Composite panel and box body manufacturer

Leading Composite Panel and Box Body Manufacturer in China.

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Nonwoven Polypropylene Honeycomb

Structural Diagram

Details

Adding a layer of non-woven fabric to the PP honeycomb core has the following benefits:

Enhanced structural stability: Non-woven fabric can increase the flatness and uniformity of the honeycomb core surface, so that the honeycomb core can disperse stress more evenly when subjected to external forces, reduce the possibility of local deformation and damage, and thus improve the stability and bearing capacity of the entire structure.

Increase glue attachment area: Non-woven fabric has a porous, fiber-interwoven structure with a large surface area. Compared with the smooth surface of the PP honeycomb core, non-woven fabric can provide more attachment points for glue, so that the glue can better penetrate and adhere between the fibers, thereby increasing the contact area between the glue and the material and improving the bonding effect.

Buffering glue shrinkage stress: During the curing process of glue, a certain degree of shrinkage usually occurs. Non-woven fabric has a certain degree of flexibility and elasticity, which can buffer the shrinkage stress generated when the glue is cured to a certain extent. This helps to reduce the risk of cracking or debonding of the bonding interface due to glue shrinkage, and improve the durability and fatigue resistance of the bonded joint.

Improved bonding strength: The composite structure of non-woven fabric and PP honeycomb core can make the glue have better bonding performance by increasing the adhesive adhesion area, improving the uniformity of glue distribution and buffering shrinkage stress, thereby significantly improving the bonding strength. Whether under static or dynamic loads, it can make the bonding part more solid and less prone to damage.

Learn more: https://topologroup.com/nonwoven-polypropylene-honeycomb/

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Gelcoat GRP, FRP, GFRP Sheet Rolls For Camper RVs, Travel Trailers

Fiberglass panels are increasingly being used as a skinning material for both the interior and exterior of RVs. Fiberglass panels are favored for their durability, lightweight properties, and weather resistance. TOPOLOGROUP, a fiberglass reinforced composite materials manufacturer in China, provides high-quality fiberglass panels for RV structure construction.

Product Features

Durability

RV fiberglass panels are a tough and strong material that can withstand minor impacts without denting. This makes the RV capable of withstanding adverse weather conditions

Lightweight One of the main advantages of fiberglass panels is their low weight. This helps reduce the overall weight of the RV, improves fuel efficiency and makes the vehicle easier to tow.

Weather Resistance Fiberglass panels are resistant to moisture, rust, corrosion and UV rays, ensuring that the RV will remain in good condition even when exposed to rain, snow, moisture or hot sun.

Aesthetics RV fiberglass panels have a flat and smooth appearance and can be painted in any pattern the user prefers.

Easy Maintenance Fiberglass panels are relatively easy to clean and maintain, and can be easily repaired if damaged.

Thermal Insulation Fiberglass panels are low in thermal conductivity, which can reduce heat transfer between the interior and exterior of the RV, helping to maintain a comfortable internal temperature in the RV.

Weather Resistant Gel-coat

Gel coat is a material used on the surface of fiberglass reinforced plastics. It provides a smooth, hard surface and aesthetic effect for RV fiberglass panels. In order to obtain better performance, we use marine gel coat, which is weather-resistant and can maintain bright colors for a long time without fading or chalking.

Surface Treatment

The surface of the RV fiberglass panel can be processed into different styles.

Glossy Surface

Matte Surface

Embossed Pattern Surface

Fabric Pattern Surface

Surface Color

By adjusting the color of the gel coating, FRP panels can achieve a rich variety of surface colors and finishes, allowing RV bodies to present different visual styles and brand images. Customers can customize panel colors according to project requirements, vehicle design concepts, or corporate brand standards. To ensure accurate color matching during production, please

Fiberglass Sandwich Panels for RVs

Using fiberglass sandwich panels to build modular RVs makes building RVs more efficient, more stable and reliable, and more personalized. This construction method is suitable for off-road trailers, expedition vehicles, C class RVs, teardrop RVs, campers, etc. Fiberglass panels can be combined with a variety of core materials (foam, honeycomb, plywood) to form sandwich panels that meet application requirements.

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Choose TOPOLOGROUP Solutions

As a professional RV panel manufacturer, TOPOLOGROUP provides reliable body structure solutions for various types of RVs, including expedition trucks, off-road trailers, truck campers, caravans, and teardrop trailers.

☑ High-quality raw materials are the foundation for creating durable and lightweight RV body panels. We carefully select premium core materials and FRP skins to ensure superior insulation, strength, and weather resistance.

☑ Meanwhile, we continuously optimizes RV body structure design to achieve better lightweight performance, durability, water resistance, and long-term reliability.

☑ From panel production to CNC machining and customized manufacturing, we offer comprehensive manufacturing support to improve efficiency and product quality.

Learn more: https://topologroup.com/rv-fiberglass-panels/

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Truck Camper Composite Panels

FRP (GRP) sandwich panels are one of the best materials for building truck campers. These high-quality composite panels greatly improve the comfort, durability and aesthetics of campers. As a leader in China’s composite material manufacturing industry, TOPOLOGROUP supplies high-quality truck camper composite panels for RV manufacturers in the global market.

Application Scope

Wall panels.

Roof panels.

Floors.

FRP composite panels for truck campers

01. FRP style FRP sheets are lightweight, rigid, waterproof and easy to clean. They are a preferred material to replace aluminum sheets as the composite panel skin for campers. TOPOLOGROUP has developed a variety of flat FRP for composite panels. Users can choose the preferred surface color and pattern to match the design style.

02. Core material series

TOPOLOGROUP provides different series of foams as the core material of composite panels. Their differences in weight, insulation, waterproofness and strength allow camper builders to choose according to actual needs.

PVC foam core series

XPS foam core series

PET foam core series

Processing of composite panels for truck campers

After the composite panel is pressed, only a primary product is obtained. To obtain a panel that meets the assembly requirements, a series of mechanical processing is required. CNC machine processing is an efficient choice to speed up the processing speed and improve the processing accuracy. The edges of the composite panel will be trimmed flat, and the milling cutter will process the location for installing doors, windows, skylights, air conditioners, vents, and trunks.

Connecting profiles for composite panels

To connect the composite panels tightly, it is necessary to design a reasonable connecting profile. We customize personalized aluminum extrusions as connecting trims. These aluminum profiles are usually 6061 grades with good mechanical properties and can be heat treated and welded. They are not only strong and durable, but also enhance the overall aesthetics of the camper.

Learn more: https://topologroup.com/truck-camper-composite-panels/

For more information about composite panels for truck campers, please consult us and we will provide you with high-level solutions.

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Fiberglass Reinforced Polyurethane Board

High-density fiberglass reinforced polyurethane board is an advanced composite material, which is composed of polyurethane prepreg and glass fiber, and has the advantages of high strength, high modulus, corrosion resistance, wear resistance, etc. It is increasingly being used as a sustainable and high-performance substitute for wood in various applications. It can be used in a variety of demanding applications, especially in industries that require durability.

Structure Diagram

Description

High Strength Fiberglass reinforcements add strength, allowing the board to withstand mechanical stress and impact without cracking or bending.

Moisture Resistance The combination of fiberglass and polyurethane resists moisture absorption, making it suitable for wet environments or applications where moisture is a concern.

Durability and Longevity The material is extremely durable and can withstand environmental stress, wear and tear, and impact for long periods of time, providing long-term value.

Nail Holding Power It offers the same nail holding ability as wood but is less prone to cracking, making it more effective at securely holding nails, screws, and other fasteners over time.

Diverse Surface Treatments The surface can be treated to be non-slip or flat, depending on application requirements.

Density and Strength Generally speaking, the higher the density of Fiberglass reinforced polyurethane board, the higher its strength. However, there is a critical point between the two. An increase in density does not necessarily lead to a corresponding increase in strength, but may lead to a decrease in other strengths.

Specifications

Core Material

Polyurethane (PU)

Reinforcement Material

Fiberglass

Thickness

10 mm – 100 mm

Size

1220 mm × 2440 mm

Customizable

Density

500 – 800 kg/m³

Customizable

Compressive Strength

0.3 – 0.6 MPa

Thermal Conductivity (k-value)

0.022 – 0.028 W/m·K

Thermal Resistance (R-value)

3.5 – 5.0 m²·K/W

Fire Resistance

Class B2

Moisture Absorption

< 2%

Water Vapor Permeability

< 0.1 perms

Flexural Strength

200 MPa

Flexural Modulus

4000 MPa

Typical Applications

Truck and trailer floors.

Composite panel embedded parts.

Building formwork.

Wall panels.

Platform floors.

Partitions, etc.

Learn more: https://topologroup.com/fiberglass-reinforced-polyurethane-board/

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Thermoplastic Unidirectional Prepreg Tape

Thermoplastic prepregs are advanced composite materials made from continuous reinforcing fibers (such as carbon, glass, or aramid fibers) pre-impregnated in a thermoplastic resin matrix.

TOPOLOGROUP – Expert in Thermoplastic Composites

As a leading manufacturer of high-performance thermoplastic prepregs in China, TOPOLOGROUP’s independently developed core technologies continue to provide global companies with thermoplastic unidirectional prepreg tapes and thermoplastic composite sheets for a wide range of applications, helping customers create more efficient and environmentally friendly solutions.

Unidirectional (UD) continuous fibers are laid uniformly in a single direction and firmly impregnated with the resin, resulting in extremely high tensile and flexural strength in the fiber direction. These UD tapes are designed for high-performance applications due to their superior mechanical properties, recyclability, and processing advantages.

Performance Advantages ☑ High strength and high stiffness

Thermoplastic prepregs are reinforced with continuous fibers, which have superior mechanical properties, making them resistant to wear, pressure, and breakage.

☑ Lightweight

Typically with a density of around 1.6g/cm³, these materials are widely used in industries such as aerospace, automotive, and sports equipment, where reducing weight without compromising strength is crucial.

☑ Fast Processing

Thermoplastic prepregs do not require curing, as thermosets do. Instead, they are compacted and formed by applying heat and pressure, which reduces production cycles and increases manufacturing output.

☑ Recyclability

Unlike thermoset prepregs, thermoplastic prepregs can be reheated, reshaped, and recycled, contributing to more sustainable manufacturing practices.

Specifications

Fiber Type

Glass fiber

Carbon fiber

Aramid fiber

Fiber Content

50% – 70%

Resin Types

PP (Polypropylene)

PPS (Polyphenylene Sulfide)

PE (Polyethylene)

PA (Polyamide)

PEI (Polyetherimide)

PC (Polycarbonate)

PEEK (Polyetheretherketone)

PET (Polyethylene Terephthalate)

PSU (Polysulfone)

Color

Black

Amber

Natural

Core Selection

3 inches

6 inches

UD Tape Thickness

0.15 mm – 0.40 mm

Coil Width

10 mm – 650 mm

Area Weight

240 g/㎡ – 600 g/㎡

Length Selection

1000 m/roll

1500 m/roll

2000 m/roll

Custom lengths available

Production Process of Thermoplastic Prepreg Tape

The most common preparation process is melt impregnation. Fibers are drawn from a fully automated tensioned fiber unwinder and passed through a mechanical unwinding and heating mechanism to evenly spread and preheat the fibers. Simultaneously, a resin melt metering extruder melts the thermoplastic resin. The extruded, high-temperature resin comes into contact with the fibers in the melt impregnation die, fully impregnating the fibers with the resin. The fibers then pass through cooling rollers for cooling and shaping, pass through a waste trimming device, and finally are wound up by a winder to produce a continuous fiber-reinforced thermoplastic unidirectional tape.

Thermoplastic Composite Laminates

The thermoplastic prepreg is cut and stacked according to the design angle requirements, then heated to a certain temperature by a heater, and then a certain pressure is applied in a press, and the pressure is maintained at a certain temperature for a suitable time, and finally cooled to form a laminated sheet. This thermoplastic composite laminate has a larger area and thicker thickness. Learn More

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Lightweight Reinforced Thermoplastic - lwrt

LWRT (Lightweight Reinforced Thermoplastics) is a composite material made of glass fiber and polypropylene fiber through combing, web laying, needle punching and hot pressing. Its surface is often covered with fabric or film. It is an advanced variation of glass mat reinforced Thermoplastics (GMT) designed to provide enhanced performance for specific applications where weight reduction is a top priority. While both materials belong to the family of thermoplastic composites, LWRT is unique in that it incorporates lighter, often shorter, reinforcement fibers or other lightweight materials. Despite its lower density, LWRT maintains a balance of properties, with good impact resistance, sound absorption, and thermal stability.

LWRT Offers Better Performance

Health & Environmental Protection

The main components of LWRT sheets are glass fiber and polypropylene, without any residual or volatilized harmful substances such as benzene, aldehydes, and phenols. Experiments have shown that LWRT interior panels have no odor at a high temperature of 90°C.

LWRT materials are recyclable, which is conducive to the sustainable development of the economy.

Safe and reliable

LWRT sheets provide good flame retardant properties and extremely low burning speed (≤30mm/min), reducing the possibility of fire. Fiberglass felt can effectively absorb impact force and protect the human body.

Fiberglass felt can effectively disperse and absorb external impact force through its excellent impact resistance, reduce damage to objects or human body, and provide better safety protection for users.

How TOPOLOGROUP Optimizes LWRT Performance

The surface of LWRT can be coated with a decorative layer of various patterns to exert its artistic effect.

Without sacrificing performance, the overall weight of the new TOPOLOGROUP LWRT material is 20-30% lower than that of the ordinary material.

As a further improvement, other auxiliary layer materials are added to enhance the performance of LWRT.

Application of LWRT in the Automotive Industry

Lightweight Reinforced Thermoplastic is increasingly being used in the automotive industry due to its outstanding properties such as lightweight, durability, and cost-effectiveness. Its versatility and performance make it an ideal material for various automotive applications, especially in the pursuit of reducing vehicle weight and improving fuel efficiency without compromising safety or performance. LWRT is widely used in automobile dash isolation PA dinners, headliners, absorption pads, floor carpets, wheel guards, trunk mats, etc. Especially in the field of new energy vehicles, it greatly improves the driving experience.

Other Applications

Electronics: electronic product housings and other accessories, etc.

Aerospace: aircraft interiors.

Architectural and Industrial Products: lightweight structures, building materials, etc.

Pour en savoir plus : https://topologroup.com/lightweight-reinforced-thermoplastic/

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Anti-Slip Polypropylene Honeycomb Panels

Are you looking for a more reliable and durable lightweight flooring for your project? Are you fed up with the heavy, easily damaged wood and bamboo floors, or the diamond metal floors that easily become smooth? Anti-slip polypropylene honeycomb sandwich panels may be your right choice. Through the thermoplastic composite process, the embossed texture CFRT (continuous fiber reinforced thermoplastic) and honeycomb structure polypropylene plastic are firmly composited. It easily combines multiple benefits such as lightweight, firmness, durability, anti-slip, and easy to process.

Feature Description

Lightweight

The honeycomb structure makes its density much lower than that of solid wood, plywood, aluminum, and steel anti-slip plates, making it very easy to operate, carry, and install.

Anti-slip

The protective texture is dense and neat, and dust, rain, etc. will not affect the anti-slip effect, effectively preventing operators from falling and goods from sliding

Structural strength

The CFRT (Continuous Glass Fiber Reinforced Thermoplastic) skin offers excellent compression, impact, and abrasion resistance, capable of withstanding impacts from sharp, rough, and extremely heavy objects. The CFRT combined with a high-modulus polypropylene honeycomb core provides unprecedented structural strength.

Durable

The thermoplastic material makes it completely waterproof and chemical-resistant. It can also be safely constructed in high temperature and heavy rain weather. Double-sided anti-slip, doubles the service life.

100% recyclable

Made entirely of recyclable thermoplastic polypropylene, it’s a focal point for sustainability.

Easy to process

It can be cut to any size required and fixed to the carrier using rivets, bolts or glue.

Structural Diagram

Efficient Production Process

The CFRT sheets are introduced onto the upper and lower surfaces of the honeycomb core, softened by a preheating roller conveyor with anti-skid belts, and then the skin and core are continuously pressed together. After passing through a cooling roller conveyor, they are shaped and an anti-skid texture is pressed onto the surface. This is a very efficient production process with a maximum speed of 6.0m/min.

Applications

The convenience offered by non-slip polypropylene honeycomb panels, combined with their recyclability, is making them increasingly popular in a sustainable economy. They are widely used as flooring materials in the transportation and construction industries.

Vehicle floors

Dry freight truck floors.

Dropside truck floors.

Tipper truck floors.

Trailer ramp doors.

Building floors

Scaffolding floors.

Walkways.

Stair treads.

Temporary stages.

Pour en savoir plus : https://topologroup.com/anti-slip-polypropylene-honeycomb-panels/

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PVC Foam Sandwich Panels

The new PVC foam sandwich panel developed by TOPOLOGROUP, as a composite panel with excellent performance, cleverly integrates the unique characteristics of PVC foam core material, and on this basis, through structural innovation and material optimization, it has greatly expanded the application direction and become an ideal choice in multiple fields.

PVC Foam Sandwich Panel Manufacturer

As China’s leading PVC foam sandwich panel manufacturer, TOPOLOGROUP has won the favor of global customers with its high-quality, high-specification and high-performance products. Its customized service is one of its core competitive advantages. By deeply meeting the personalized needs of different industries and scenarios, it provides customers with a full-chain solution from material selection to finished product delivery.

Product Profiles

The structure of PVC sandwich panels is simple. It usually consists of skin material and foam core material, which are bonded by high-strength glue.

The pore size of PVC foam surface is large, so it can firmly absorb adhesive, so its surface usually does not need to be grooved for diversion adhesive.

Rigid PVC foam is harder than other brittle foams (PU, XPS, etc.), so the structural strength of PVC sandwich panels is higher, and it usually does not need to embed skeleton materials to increase strength.

PVC Foam

As a thermal insulation material with excellent comprehensive performance, PVC (polyvinyl chloride) foam has significant advantages in:

Lightweight

High strength and rigidity

Good Water Resistance

Chemical Resistance

Excellent Thermal Insulation

Flame Retardant

Easy to Process

Skin and performance

As a core material with excellent performance, PVC foam, when combined with skins of different materials, can give full play to the characteristics of each material to form a composite panel with differentiated characteristics and exclusive application scenarios.

FRP Skin PVC Foam Core Sandwich Panels

FRP (Glass Fiber Reinforced Plastic, also known as GRP) is a composite material with glass fiber as reinforcement and resin as matrix. It is lightweight, waterproof, and heat-insulating. When combined with PVC foam core, it forms a composite panel with multiple advantages.

CFRT Skin PVC Foam Core Sandwich Panels

CFRT (Continuous Fiber Reinforced Thermoplastic) is a new high-performance FRP material. It is made of multiple layers of thermoplastic UD tapes laid at different angles. It has high tensile and compressive strength and is very durable.

Aluminum Skin PVC Foam Core Sandwich Panels

The skin of the sandwich panel with aluminum alloy sheet is a lightweight and durable choice, with a variety of choices in aluminum sheet color and texture.

Applications

Given the excellent performance of PVC foam sandwich panels, it is widely used in high-standard and luxurious products.

RV bodies

Truck camper bodies

Off-road trailers.

Expedition trucks.

Caravans. .

Teardrop trailers.

Rooftop tents, etc.

Truck & trailer bodies

Refrigerated trucks.

Dry cargo trucks.

Ambulance boxes.

Food trailers.

Day-old chicken transport trucks.

Airline containers.

Portable trailers, etc.

Buildings

(Wall panels, partitions, roof panels, door panels of permanent or movable buildings.)

Factory buildings.

Outdoor temporary housing.

Clean rooms.

Cold rooms.

Warehouses.

Hotels.

Industrial equipment housings, etc.

Furniture

Cabinets.

Bed panels.

Desktop panels.

Partitions, etc.

Marines

(Floor panels, wall panels, roof panels, etc. of rooms for boats.)

Yachts.

Cruise ships.

Fishing boats.

Patrol boats, etc.

Public transportation

(Floors, partitions)

Subway.

Light rail.

Tram.

High-speed rail.

Bus.

Materials and Processing

High-quality raw materials

PVC foam is colorless, odorless, uniform in specifications and color.

The skin material meets various mechanical and chemical performance tests.

Advanced composite technology

High-pressure vacuum composite technology allows the foam core and skin material to achieve high-strength bonding and extremely flat surface of the sandwich panel. The maximum size of our composite panels can reach 12mx3.2m.

High-precision CNC machining

High-precision CNC machining can achieve precise molding of complex-shaped panels in one processing. Our factory is equipped with multiple high-precision CNC machining platforms, which are designed to meet the needs of large-scale and high-difficulty panel processing.

Pour en savoir plus : https://topologroup.com/pvc-foam-sandwich-panels/

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PET Foam Sandwich Panels

Lightweight, Durable, Eco-friendly

PET foam sandwich panels are a new type of foam composite panel. Compared with other common foam sandwich panels (such as polystyrene (EPS) and polyurethane (PU) foam panels), it not only performs well in performance, but also has significant environmental protection and recyclability advantages. Therefore, it has been widely used in many industries. It is made of polyethylene terephthalate (PET) foam as the core material, combined with different types of skin materials (such as metal, fiber reinforced plastic, aluminum foil, wood, etc.) to form a lightweight, high-strength, excellent thermal insulation and sound insulation composite panel.

TOPOLOGROUP – Innovative Sandwich Panel Manufacturer

TOPOLOGROUP is a leading PET foam sandwich panel manufacturer in China, focusing on the research, development, production and sales of high-performance composite materials. As a technology-driven company, TOPOLOGROUP uses advanced production processes and equipment to provide a variety of PET foam sandwich panels of different specifications and application scenarios to meet the needs of different industries for lightweight, high-strength and environmentally friendly materials.

Specifications

Standard Structure Inner facing + PET foam core + Outer facing

Facing Options

FRP/GRP (Glass Fiber Reinforced Plastic) sheet

CFRT (Continuous Fiber Reinforced Thermoplastic)

Aluminum sheet

Coated steel sheet

Wood (plywood, MDF)

PVC (Polyvinyl Chloride) plastic

PET (Polyethylene Terephthalate) plastic

Core Material PET (Polyethylene Terephthalate) foam

Density: 60–300 kg/m³

Composite Method Adhesive bonding or thermal composite

Dimensions

Thickness: 10–150 mm

Length: ≤ 12,000 mm

Width: ≤ 3,200 mm

Structural Diagram

As a composite material that is both lightweight and high-performance, the classic three-layer structure (facing – core – facing) of PET sandwich panels is the core design to achieve structural stability and functional diversity. This composite form seems simple, but through the synergy of each layer of material, it achieves an efficient balance in mechanical properties, lightweight and application adaptability.

Common Applications of PET Foam Sandwich Panels

Truck Bodies

Box truck bodies made of fiberglass facing PET sandwich panels are light, strong and durable.

Public Transportations

In buses, subways, high-speed trains and other means of transportation, fiberglass facing PET foam sandwich panels are used in floors and other parts to reduce the weight of the vehicle.

RVs

Fiberglass facing PET sandwich panels are used as wall panels, and Plywood facing PET sandwich panels are used as floors.

Furniture

PVC/PET facing PET foam sandwich panels are used in the production of modular furniture (such as partitions, bookcases, desktops, bed frames, cabinets, bathroom wall panels, etc.).

Learn more: https://topologroup.com/pet-foam-sandwich-panels/

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Polyurethane Foam Sandwich Panels

As a professional flat sandwich panel manufacturer, TOPOLOGROUP relies on rich manufacturing experience, advanced production equipment and excellent technology to customize PU sandwich panels for enterprises and individuals around the world. These panels have shown reliability and stability in local engineering projects.

Skin Types of Polyurethane Foam Sandwich Panels

When designing PU sandwich panels, a wide variety of surface materials can be taken into account. Relying on high-performance adhesives, polyurethane foam cores can be used with different surface materials, such as metal (aluminum, steel), plastic (FRP, CFRT), so that makes the final panel meet different application requirements. If you require unique surface materials to be applied to PU sandwich panels, we will custom make these panels for you.

FRP Skin PU Panels

CFRT Skin PU Panels

Aluminum Skin PU Panels

Coated Steel Skin PU Panels

Common Application of PU Foam Sandwich Panels

Truck & Trailer Bodies

Used in the bodies of refrigerated trucks and insulated trucks, etc., to help maintain a low temperature environment and ensure the transportation and storage of perishable items.

Modular Buildings

Used as exterior wall panels, roof panels and interior wall panels, especially suitable for buildings that require insulation, such as cold storage, refrigerated warehouses, offices and commercial buildings.

Agricultural Greenhouses

Used in greenhouses and agricultural buildings, it provides excellent thermal insulation performance, helps regulate indoor temperature and prolongs the crop growing season.

Industrial Facilities

Used in the shell of industrial equipment, providing insulation and waterproofing functions.

How We Provide High Standard PU Foam Sandwich Panels

01. Insulated PU (polyurethane) Foam Core

02. PU foam sandwich panels are made by spray adhesive technology

03. How to increase the structural strength of PU foam sandwich panels

04. High-precision CNC machining

Learn more: https://topologroup.com/pu-foam-sandwich-panels/

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XPS Foam Sandwich Panels

Reasons for choosing XPS foam as core material

Excellent thermal insulation performance

Extremely lightweight

High Compressive Strength

Excellent waterproof and moisture-proof performance

Good fire resistance

Understanding common types

FRP Sheet + XPS Foam

CFRT Sheet + XPS Foam

Aluminum Sheet + XPS Foam

Coated Steel Sheet + XPS Foam

Composite Panel Manufacturer in China

Laser positioning ensures the accuracy of sandwich panels.

Automatic glue spraying ensures uniform distribution of adhesive.

Vacuum high-pressure composite ensures the bonding strength of sandwich panels.

CNC machining completes the processing of complex shapes.

Applications

XPS foam sandwich panels are used in a variety of industries that require insulation, lightweight construction and durability, including construction, refrigeration, transportation and marine applications.

Learn more: https://topologroup.com/xps-foam-sandwich-panels/

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GRP/FRP Plywood Panels

GRP/FRP plywood panels are composite materials that combine FRP (fiberglass reinforced plastic or GRP) with plywood. The sandwich panels are known for their strength, durability, cost-effectiveness, and environmental friendliness, making them an ideal choice for various applications.

Product Advantages

High Strength FRP plywood panels offer excellent compression and bending resistance. They are not easily deformed under external forces, providing additional structural support, making them suitable for applications that require heavy load-bearing.

Durability Enhanced by FRP, the panels offer superior corrosion resistance and UV protection, allowing them to be used for extended periods in harsh environments. They are especially suitable for areas with high humidity and intense UV exposure.

Cost-Effective Compared to other high-strength materials, FRP plywood panels offer significant cost advantages. With mature production processes, they provide more efficient material utilization, making them a great option for projects with limited budgets but high-performance requirements.

Environmental protection Plywood is a renewable resource. Compared with traditional wood, plywood has higher production efficiency and can make full use of wood resources, thus reducing waste.

Innovative FRP Sandwich Panel Manufacturer

TOPOLOGROUP is an FRP plywood panel manufacturer in China. We provide a variety of customized sandwich panel services. Our factory is equipped with industry-leading composite panel production lines, using unique production processes to meet users’ personalized design requirements.

One-piece vacuum composite process: The sandwich panel is laminated under high pressure in a vacuum environment. The surface of the panel after molding is flat, and tightly bonded, and the strength is far superior to ordinary composite panels.

Extraordinary size customization: The size of the composite panel can reach 12mx3.2m. (The current maximum size of the container is 40 feet (12.03 meters)

Any shape can be processed: High-precision CNC processing can meet any personalized design needs and maintain the consistency of product precision.

Structural Diagram

FRP plywood panels are typical 3-layer sandwich panels with a middle layer of plywood and two outer layers of FRP sheets bonded together with adhesive.

Applications

FRP plywood panels are valued for their ability to combine the structural benefits of plywood with the protective and durable properties of FRP, making them suitable for a wide range of demanding applications.

Truck & Trailer Bodies

FRP plywood panels are commonly used in the construction of dry freight truck bodies, and trailers. Their strength and durability make them ideal for withstanding the rigors of transportation.

Bus and RV Construction

These panels are used in the walls, floors, and roofs of buses, RVs, and other specialty vehicles due to their lightweight and robust properties.

Modular Buildings

FRP plywood panels are used in modular building construction, including temporary structures and portable buildings, where quick assembly and durability are crucial.

Marine Applications

In the marine industry, these panels are used in boat decks, bulkheads, and cabin structures due to their resistance to moisture and corrosion.

Agricultural Structures

FRP plywood panels are used in farm equipment and storage units due to their durability and ease of maintenance.

Learn more: https://topologroup.com/frp-plywood-panels/

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GRP / FRP Sandwich Panels

FRP sandwich panels, short for fiberglass reinforced sandwich panels, also known as GRP sandwich panels, are made of flat FRP sheets as the skin and core material. As a new type of composite material, it is increasingly demonstrating its excellent performance in various industries.

We are China’s most innovative FRP sandwich panel manufacturer, providing customized solutions to global customers, solving difficult problems in material application and breaking the limitations of traditional material applications.

We strive to address the following material properties:

Lightweight.

High strength.

Durability.

Waterproof.

Thermal insulation.

Aesthetics.

Ease of cleaning.

Easy processing.

Types of FRP sandwich panels

FRP sheets can be composites with many materials through adhesives. Commonly, core materials include foam (XPS, PET, PVC, PU, ​​etc.), honeycomb (polypropylene), plywood, etc. Using different core materials can bring different application effects to GRP sandwich panels, such as foam core has advantages in thermal insulation, honeycomb core is lighter, and plywood has higher strength. Or different materials can be combined together as core materials to make the panel gain multiple advantages.

Foam Core Panels

Honeycomb Core Panels

Plywood Core Panels

Applications of FRP Sandwich Panels

Fiberglass sandwich panels have replaced metal and wood in many fields, giving full play to their performance advantages and becoming an indispensable material choice in economic development.

Weather-resistant FRP Sheets

As a professional composite sandwich panel manufacturer in China, TOPOLOGROUP offers high-quality FRP sheets. Featuring a weather-resistant coating, these sheets are durable and fade-resistant, withstanding diverse weather conditions, including rain, snow, hail, frost, and intense sunlight. To meet the personalized needs of customers, we offer customizable colors (RAL colors) and surface processing options, including various patterns and textures. Our technicians will tailor the thickness of the FRP sheets to your specific strength requirements for optimal mechanical performance.

Custom colors: RAL color series.

Custom surface textures: Glossy, matte, embossed, rough, etc.

Custom sizes: Max. 3.2 x 12m.

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How to enhance the structural strength of foam core FRP sandwich panels?

Larger area, higher load-bearing capacity and impact resistance

Pre-embedded frame

Build an internal support frame to enhance load-bearing capacity

Pre-embedded frame inside the foam core panel is like implanting “skeleton” into the panel, which can fundamentally improve the anti-deformation ability and dimensional stability, especially suitable for large-size panels.

Adding an energy-absorbing layer

Build an internal support frame to enhance load-bearing capacity

On the side of the panel that is often subjected to force, add an energy-absorbing layer (usually plywood, composite materials, etc.) between the skin and the foam core. Just like adding a “cushion” to the panel, it can absorb external impact forces (such as collision, extrusion, vibration) through material deformation or energy conversion, reducing damage to the internal core structure.

Post-processing of FRP sandwich panels

High-precision CNC machining easily handles complex designs

Learn more: https://topologroup.com/frp-sandwich-panels/

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Removable Insulated Partitions for Refrigerated Truck Bodies

Enable Flexible Multi-Temperature Transport in One Vehicle

It may seem inconceivable for a single refrigerated truck to carry cargo requiring different temperature settings simultaneously. Yet technically, all it takes is a high-performance insulated partition. With this partition, the refrigerated container is no longer limited to cold-chain goods alone—ambient-temperature cargo and temperature-sensitive freight can now be transported together in one vehicle. Once users discover these insulated partitions, there is little need to dwell on their basic advantages. What truly makes them the preferred choice for refrigerated truck body designers is their innovative, breakthrough structural design.

Rigid Structural Support

Like other structural modules of the refrigerated truck body, the partition is engineered from a composite of fiberglass sheets and insulated foam core. It maintains a rigid structure, combining lightweight properties with exceptional thermal insulation. Far more reliable and durable than any flexible partition alternative.

Reinforced Frame: Built-in non-metallic structural support maintains rigidity, is not easily deformed during transportation, and can withstand internal air pressure and temperature stress.

Outer Skin: High-strength fiberglass (FRP) panel, corrosion-resistant, impact-resistant, easy to clean, and meets food-grade and cold chain logistics standards.

Insulation Core Material: Rigid insulation foam (such as polyurethane foam, extruded polystyrene), with low thermal conductivity and stable long-term insulation performance.

Exceptional Mobility

The partition glides smoothly along pre-installed rails, allowing flexible adjustment of compartment sizes based on cargo volume. This optimizes cooling efficiency and energy performance. When not in use, it can be fully retracted without occupying valuable cargo space.

It can be easily moved along the tracks, dividing the cargo space into multiple temperature zones as needed.

The proportion of each temperature zone can be freely adjusted according to the cargo volume to maximize refrigeration efficiency and space utilization.

When not in use, it can be folded, stacked, or stowed to one side, completely restoring the standard refrigerated box space without occupying effective loading area.

Perfect Sealing Performance

The edges of the partition are fitted with high-elasticity, low-temperature-resistant EPDM rubber seals, delivering an airtight barrier that completely blocks moisture transfer between separate temperature zones. Ensure that frozen goods at -18℃ and fresh goods at 2–8℃ are transported in the same vehicle to prevent damage or freezing.

Partition System Overview

The partition system is fully customizable in terms of materials, dimensions, thickness and internal structure, tailored precisely to individual clients' requirements and design preferences.

Dimensions (width, height, thickness) are customizable.

Insulation layer thickness can be adjusted according to temperature difference requirements.

Single-panel, multi-fold, or split-type structures are available.

Partner with a trusted refrigerated truck body manufacturer to explore more integrated solutions for your projects.

Learn More：https://topologroup.com/removable-insulated-partitions-for-refrigerated-truck-bodies/

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Recyclable Foam Composite Panels for Modular Housing

A New Generation Solution for Modular Construction

Are you still using traditional steel or timber structures for modular housing? Or perhaps you’ve already adopted the increasingly popular SIP panels? As the construction industry continues to demand lighter, more sustainable, and higher-performance materials, a new solution is emerging—reshaping the way modular buildings are designed and built. PET foam core composite panels, made from recyclable foam materials, are now entering the construction market as an innovative alternative. They not only improve traditional building methods but also strike an ideal balance between performance and sustainability.

Advanced Panel Structure

Outer layer

A lightweight fiberglass surface layer ensures excellent weather resistance and long-term durability.

Core Material

Rigid, recyclable PET foam core providing outstanding strength-to-weight performance.

Why choose PET foam as the panel core？

Recyclable & Eco-Friendly

Lightweight Construction

Excellent Water Resistance

Structural Stability & Durability

Thermoplastic FRP or Thermoset FRP as Skin？

We offer two types of fiberglass-reinforced skin PET foam composite panels, each engineered for high strength, lightweight performance, and excellent dimensional stability.

FRP Skin PET Foam Sandwich Panels

Panel Structure

FRP sheet + PET foam + FRP sheet.

Feature

Lightweight, UV-resistant FRP (Fiberglass Reinforced Plastic) surface layer ensures excellent weather resistance and long-term durability.

CFRT Skin PET Foam Sandwich Panels

Panel Structure

CFRT sheet + PET foam + CFRT sheet.

Feature

Lightweight and wear-resistant CFRT (Continuous Fiber Reinforced Thermoplastic) sheets offer excellent rigidity and outstanding impact resistance.

A Revolution in Modular Construction Efficiency

Prefabricated PET composite panels are reshaping the modular housing construction process through standardized production and simplified installation.

Prefabricated Production

Composite panels undergo precise processing in the factory, including cutting, drilling, and chamfering, with dimensional errors controlled within ±2mm. Customized specifications can be produced according to house design drawings, along with prefabricated accessories such as door and window opening reinforcements and corner connectors, reducing on-site processing.

Rapid Assembly

Modular kit packaging, with panels separated by cushioning foam, minimizes damage during transportation. Due to the lightweight of individual panels, small modular houses can be manually handled and installed by 2-3 workers, while large modules require only a small crane. Compared to the 10-ton cranes required for traditional SIP panels, equipment rental costs are significantly reduced.

TOPOLOGROUP – Building the Next Generation of Modular Housing Solutions

01. Customization Options

We offer flexible customization to meet diverse project requirements:

Panel Thickness: 50mm – 200mm.

Panel Dimensions: Up to 3m × 12m.

Color Options: Fully customizable according to the RAL color chart.

Functional Upgrades: Optional enhancements including

These options ensure suitability for a wide range of applications, including residential, commercial, healthcare, and cultural tourism projects.

02. Design Optimization Support

Our professional engineering team provides integrated design solutions tailored to your project conditions, including:

Panel layout optimization.

Structural joint reinforcement.

Thermal insulation and energy efficiency design.

All solutions are developed based on local climate conditions, geological factors, and functional requirements, ensuring optimal performance and long-term reliability.

Learn more:https://topologroup.com/recyclable-foam-composite-panels-for-modular-housing/

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Capsule House Flooring

Composite flooring is the future trend

Flooring, a crucial component for both structural integrity and living experience, must simultaneously consider “structural stability, scenario adaptability, and overall cost-effectiveness.” This necessitates the use of traditional wooden flooring (heavy, susceptible to moisture, and complex to maintain), making new composite materials an inevitable choice. Traditional wood flooring has long been problematic in the application of luxury portable capsule houses: not only are initial purchase costs high, but the complex installation process also requires additional labor and time. Furthermore, long-term maintenance, such as moisture control, insect prevention, and warping repair, also demands significant investment. This contradicts the core positioning of capsule houses as “efficient and convenient,” and fails to meet their demands for a luxurious living experience. In contrast, the emergence of wood-grain vinyl leather composite flooring with an innovative integrated structure offers an ideal alternative that combines economy and high performance, bringing dual value innovation to both residents and builders.

What types of composite flooring structures do we offer for capsule houses?

PET Foam Core Flooring

Vinyl Leather + CFRT Skin PET Foam Sandwich Panel

PP honeycomb core flooring

Vinyl leather + CFRT Skin PP Honeycomb Sandwich Panel

XPS Foam Core Flooring

Vinyl Leather + FRP Skin XPS Foam Sandwich Panel

Surface Pattern

We offer a variety of vinyl leather textures, from modern minimalist finishes to classic wood grain finishes, providing a diverse range of flooring options to complement any interior theme.

The core advantages of new composite flooring replacing wooden flooring

For residents

Upgraded living comfort

Health and environmental friendliness

Easy to clean and maintain

High adaptability

For capsule home builders

Affordable

Environmentally friendly

Easy to process

Quick installation

Learn more: https://topologroup.com/capsule-house-flooring/

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Dry Van Bodies

TOPOLOGROUP is a professional manufacturer and designer of dry van bodies for trucks and trailers.

 CKD, SKD, CBU: We provide flexible solutions including CKD (Completely Knocked Down), SKD (Semi Knocked Down), and CBU (Completely Built Up) van body options to meet the diverse needs of global customers.  Optimized design: With strong engineering capabilities, we offer professional van body design, customization, and structural optimization services, ensuring high performance, durability, and cost-efficiency.  Custom accessories: In addition, TOPOLOGROUP supplies a wide range of high-quality van body assembly parts such as subframes, hinges, locks, corner caps, and aluminum profiles, enabling customers to build reliable and efficient logistics vehicles with ease.

Features

☑ Lightweight and Durable

The van body is constructed from high-performance composite panels, precisely connected via high-strength aluminum alloy profiles, resulting in a sturdy yet lightweight structure. This design not only enhances the overall durability of the van, but also effectively reduces vehicle weight, improving transport efficiency and fuel or power efficiency.

☑ Sealed Structure

The van body features a fully enclosed design, with the top, sides, and rear doors completely covering the cargo, effectively protecting it from rain, dust, wind, and the sun.

Dimension and Application

TOPOLOGROUP manufactures dry van bodies from 13-53 feet and for many types of cargo transport.Size (Length x Width x Height)Capacity (Cubic Feet)Use20 ft x 8 ft x 8.5 ft1,600Small deliveries24 ft x 8 ft x 8.5 ft1,920Regional deliveries26 ft x 8.5 ft x 13.5 ft1,900Box trucks/local use30 ft x 8.5 ft x 13.5 ft2,400Larger regional freight40 ft x 8.5 ft x 13.5 ft3,000Intermodal transport45 ft x 8.5 ft x 13.5 ft3,400Specialized freight48 ft x 8 ft x 8.5 ft3,200Standard dry freight53 ft x 8 ft x 8.5 ft3,800Full-load shippingModular dry van bodies - Make assembly easier

Quick assembly of the box body

Modular dry van bodies are designed to be flexible and efficient. They are made of interchangeable parts that can be quickly installed and removed. It is simple to operate and has very low maintenance costs. We can configure the box according to specific transportation needs.

Learn more: https://topologroup.com/dry-van-bodies