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Tips about PP resin

PP resin is polypropylene resin, its chemical and physical properties are a kind of semi-crystalline material. It is harder than PE and has a higher melting point.

Polypropylene resin has the lowest density among general-purpose plastics. It is a milky white highly crystalline polymer, non-toxic and odorless; it has good mechanical properties, rigidity, abrasion resistance, and hardness; it has good heat resistance and poor cold resistance; It does not absorb water, has good chemical stability, but is not resistant to sunlight and has poor thermal stability; it is flammable and smells of oil when burned; it has good electrical insulation and voltage resistance; the film is transparent and has poor permeability to air and water vapor; used for molding Film, silk and other products are better, but dyeing, printing, and adhesion are poor.

PP Polypropylene chemical and physical properties PP is a semi-crystalline material. It is harder than PE and has a higher melting point. Since homopolymer PP is very brittle when the temperature is higher than 0C, many commercial PP materials are random copolymers with 1 to 4% ethylene or clamp copolymers with higher ethylene content. Copolymer PP material has lower thermal distortion temperature (100C), low transparency, low gloss, low rigidity, but has stronger impact strength. The strength of PP increases with the increase of ethylene content. The Vicat softening temperature of PP is 150C. Due to the high crystallinity, the surface rigidity and scratch resistance of this material are very good.

PP does not have the problem of environmental stress cracking. Usually, the PP is modified by adding glass fiber, metal additives or thermoplastic rubber. The flow rate MFR of PP ranges from 1 to 40. PP materials with low MFR have better impact resistance but lower elongation strength. For materials with the same MFR, the strength of the copolymer type is higher than that of the homopolymer type. Due to crystallization, the shrinkage rate of PP is quite high, generally 1.8~2.5%. And the direction uniformity of shrinkage is much better than that of PE-HD and other materials. Adding 30% of glass additives can reduce the shrinkage to 0.7%. Both homopolymer and copolymer PP materials have excellent moisture absorption, acid and alkali corrosion resistance, and solubility resistance. However, it has no resistance to aromatic hydrocarbons (such as benzene) solvents, chlorinated hydrocarbons (carbon tetrachloride) solvents, etc.

JOYSUN was established in 2005, focusing on the production of plastic rubber foaming agents, WPC additives and PVC calcium-zinc stabilizers, with R&D and export services. In addition to production aids, JOYSUN is also a technical service provider and promoter in the field of plastics and rubber. We are a wood-plastic lubricant processing factory, if you need it, please contact us.

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Acrylate processing aid

In the process of development and application of processing aids, the product components are roughly divided into the following categories: methyl methacrylate (MMA)/acrylate copolymer, MMA/styrene copolymer, acrylonitrile/styrene, etc. The most used and effective is MMA/acrylate copolymer.

The impact modifier ACR and the processing aid ACR are both acrylate polymers, but their properties are quite different due to their different formulation ratios and structures. In impact ACR, methyl methacrylate accounts for about 10-20%, while acrylic Esters account for about 80-90%. The impact modifier ACR has a core-shell structure like MBS. Compared with impact modifiers such as MBS and CPE, its processing performance and weather resistance are good, and the surface finish is high. It is especially suitable for outdoor products. In foreign countries, acrylic impact modifiers are environmentally friendly, have excellent performance and weather resistance. High performance has replaced CPE impact modifier.

Domestic research on counteracting ACR was earlier, but the real industrial production was still in the late 1990s. However, due to the large domestic CPE production capacity and low price, downstream customers have low product quality requirements. As a result, the price is 1/3 higher than that of CPE and the added amount of impact ACR is difficult to be promoted in the market.

K278P is a PVC foaming regulator with medium melt strength, which can significantly promote the low-temperature melting of PVC, effectively reduce the plasticizing temperature and shorten the plasticizing time. In addition, it can also enhance the cohesion and uniformity of the PVC melt, while broadening the processing temperature range, it gives the PVC polymer higher melt strength, elongation and elasticity, and reduces the pulsation and instability of the melt. Promote surface brightness and smoothness. This product has good dispersibility and good PVC processing fluidity. It is suitable for the production and processing of various PVC foamed building materials and profiles, effectively improving production efficiency. By increasing the melt strength, the cell structure of PVC foamed products can be made uniform. The use of foaming agent together can reduce the density of the products. Suitable for processes with slower plasticization speed.

JOYSUN was established in 2005, focusing on the production of plastic rubber foaming agents, WPC additives and PVC calcium-zinc stabilizers, with R&D and export services. In addition to production aids, JOYSUN is also a technical service provider and promoter in the field of plastics and rubber. Its core business is the production and sales of foaming agents, stabilizers, lubricants and new additives in plastic additives. We are a foaming agent factory, if you need it, please contact us.

#Acrylate processing aid #JOYSUN #foaming agent factory

The development trend of PVC stabilizers

The development of PVC stabilizers has brought a lot of convenience to our lives. The research and development of each additive will derive PVC products that affect our lives. The PVC material is polyvinyl chloride, which can be seen everywhere in our lives. Pipe fittings, oil pipes, centrifugal pumps and blowers, etc. Polyvinyl chloride hard boards are widely used in the chemical industry to make linings for various storage tanks, corrugated boards for buildings, door and window structures, wall decorations and other construction materials. Due to its excellent electrical insulation performance, it can be used to manufacture plugs, sockets, switches and cables in the electrical and electronic industries. In daily life, PVC is used to make sandals, raincoats, toys and artificial leather.

The increase in demand for PVC products drives the development of the PVC stabilizer industry. PVC products affect our lives, so the development of PVC stabilizers is getting closer and closer to life and affecting life. Industrial development PVC stabilizer industry is also developing rapidly. The development trend of additives is also toward non-toxic, multifunctional, compounding, molecular weight, compound additives and rapid progress in container technology.

Trend of multifunctional chemical additives

Great progress has been made in the development of multifunctional additives. Antistatic plasticizers, flame retardant plasticizers, and multifunctional stabilizers have all come out.

PVC stabilizer compound additives and containerization trend

According to the principle of synergy between various additives, compounding the additives into a package is helpful to facilitate plastic processing and full automation. Compound products mostly appear in the application system of hindered phenol main antioxidants and phosphite auxiliary antioxidants, while the wheat chemical additives are mainly used in the field of PVC processing.

High molecular weight trend of PVC stabilizers

The development progress of stabilizing additives, plasticizers, flame retardants and other varieties reflect this trend. In terms of stabilizing additives, the high 150 molecular weight hindered amine light stabilizer also shows thermal oxidation resistance, high molecular weight plasticizers are resistant to extraction; high molecular weight flame retardants have heat resistance and resin compatibility Improved.

The future of PVC stabilizers will definitely be towards green, healthy and environmentally friendly diversified development. Integration into our lives.

JOYSUN was established in 2005, focusing on the production of plastic rubber foaming agents, WPC additives and PVC calcium-zinc stabilizers, with R&D and export services. In addition to production aids, JOYSUN is also a technical service provider and promoter in the field of plastics and rubber. We are Meltblown additives supplier, if you need it, please contact us.

#PVC stabilizers #JOYSUN #Meltblown additives supplier

Advantages of PP wood-plastic composite materials

PP wood-plastic composite material is a new type of composite material that has flourished at home and abroad in recent years. It refers to the use of polypropylene, mixed with wood flour, rice husk, bamboo powder and other plant fibers to form new wood materials, mixed and granulated. Composite particles are raw materials for the production of plates or profiles, mainly used in building materials, furniture, logistics packaging and other industries. PE wood-plastic composite materials must be prepared into particles before they can be used.

Material performance advantages

1. Good processing performance

Wood-plastic composite materials contain plastics and fibers, so they have similar processing properties to wood. They can be sawed, nailed, and planed, and can be completed with woodworking tools, and the nail-holding power is significantly better than other synthetic materials. The mechanical properties are better than wood materials. The nail holding force is generally 3 times that of wood and 5 times that of particleboard.

2. Good strength performance

The wood-plastic composite material contains plastic, so it has a good elastic modulus. In addition, because it contains fiber and is fully mixed with plastic, it has physical and mechanical properties such as compression resistance and bending resistance equivalent to hardwood, and its durability is significantly better than ordinary wood materials. The surface hardness is high, generally 2 to 5 times that of wood.

3. It has water resistance, corrosion resistance and long service life

Compared with wood, wood-plastic materials and their products are resistant to strong acid and alkali, water and corrosion, and do not breed bacteria, are not easy to be eaten by insects, and do not grow fungi. The service life is long, up to more than 50 years.

4. Excellent adjustable performance

Through additives, plastics can undergo changes such as polymerization, foaming, curing, modification, etc., thereby changing the density and strength of wood-plastic materials, and can also meet special requirements such as anti-aging, anti-static, and flame retardant.

5. Long service life

It has ultraviolet light stability and good colorability. Can be used outdoors for a long time.

6. Recycle

Its biggest advantage is to turn waste into treasure, and it can be 100% recycled and reproduced. It can be decomposed and will not cause "white pollution". It is a truly green and environmentally friendly product.

JOYSUN was established in 2005, focusing on the production of plastic rubber foaming agents, WPC additives and PVC calcium-zinc stabilizers, with R&D and export services. In addition to production aids, JOYSUN is also a technical service provider and promoter in the field of plastics and rubber. In addition, we are foaming agents supplier, if you need it, please contact us.

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Detailed explanation of wood plastic material additives

Wood-plastic composites often have some additives added, such as coupling agents, light stabilizers, pigments, lubricants, fungicides and foaming agents. The following table lists commonly used additives and their roles in composite materials.

Wood-plastic composite materials often need to add lubricants to improve the fluidity of the melt and the surface quality of the extruded products. Lubricants are divided into internal lubricants and external lubricants. The choice of internal lubricant is related to the matrix resin used. It must have good compatibility with the resin at high temperatures, and produce a certain degree of plasticization, reduce the cohesive energy between the molecules in the resin, and weaken the interaction between the molecules. Friction to achieve the purpose of reducing the melt viscosity of the resin and improving the melt fluidity. The external lubricant actually plays the role of lubricating the interface between the resin and the wood powder in the plastic molding process, and its main function is to promote the sliding of the resin particles. Generally, a kind of lubricant often has both internal and external lubricating properties. Lubricants have a certain impact on the service life of the mold, barrel, and screw, the production capacity of the extruder, the energy consumption in the production process, the surface finish of the product and the low-temperature impact performance of the profile. Commonly used lubricants are: polyethylene wax, paraffin wax, oxidized polyethylene wax and so on.

Wood-plastic composite materials have many advantages, but due to the combination of resin and wood powder, their ductility and impact resistance are reduced, the material is brittle, and the density is nearly twice that of traditional wood products, which limits its wide use. However, the foamed wood-plastic composite material has a good cell structure, which can passivate the crack tip and effectively prevent the expansion of the crack, thereby significantly improving the impact resistance and ductility of the material, and greatly reducing the density of the product . There are many types of blowing agents, and there are mainly two commonly used ones: endothermic blowing agents (such as sodium bicarbonate NaHC03) and exothermic blowing agents (azodicarbonamide AC). The viscoelasticity of the material melt and the foaming form have different effects, so the appropriate foaming agent should be selected according to the use requirements of the product.

JOYSUN company was established in 2005, focusing on producing plastic & rubber foaming agent, WPC additives and PVC Ca-Zn stabilizer, is qualified for R & D and provides export service as well. Besides producing additives, JOYSUN is technical service provider and promoter in plastic & rubber field. In addition, we are also a PVC Ca-Zn stabilizer supplier, if you need it, please contact us.

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What is a processing aid

release time:2021-08-09source:Zhejiang Joysun Advanced Material Co.,LtdViews:26

Processing aids are substances that play an auxiliary role, and generally have the functions of aiding filtration, clarification, adsorption, lubrication, demoulding, decolorization, peeling, extracting solvents, and nutrients for fermentation. Some are used in food, some are used in manufacturing and so on.

1. Definition of processing aids"Auxiliary" is a widely used concept, and various materials have their own additives. Generally speaking, additives are various auxiliary chemicals that need to be added during the production or processing of certain materials and products. Since most additives are added to materials or products during processing, they are often referred to as "additives" or "compounding agents".

2. Function and classification of additivesPlastic processing aids are inorganic and organic; there are single compounds and mixtures; there are low-molecular compounds and high-molecular polymers. Therefore, the classification of additives is more complicated. Generally speaking, the classification of plastic processing aids is based on their functions.

Stabilizer

Such additives give plastic products stable performance and prevent or delay the aging degradation of resin during storage, processing and use. Mainly include antioxidants, light stabilizers, heat stabilizers and anti-fungal agents.

Processing aids

Its function is to improve the processing performance of plastics, usually including lubricants, mold release agents, and processing modifiers. Lubrication and release agents reduce the friction during resin processing, prevent plastics from sticking to processing equipment or molds, improve production efficiency and ensure smooth surface of products. Processing aids, also known as processing modifiers, promote resin melting and improve thermal deformation and product surface gloss.

Functional additives

Functional additives cover a wide range and can be roughly divided into: additives to improve mechanical and physical properties, softening and lightweight additives, apparent performance modifiers, antistatic agents, flame retardants, etc.

JOYSUN was established in 2005, focusing on the production of plastic rubber foaming agents, WPC additives and PVC calcium-zinc stabilizers, with R&D and export services. In addition to production aids, JOYSUN is also a technical service provider and promoter in the field of plastics and rubber. Otherwise, PVC Ca-Zn stabilizer for sale, if you need it, please contact us.

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