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The function of wood plastic lubricant

Wood-plastic lubricants are dedicated to the production and processing of wood-plastic composite materials: improve their processing fluidity, improve product appearance quality, ensure product physical properties, reduce the friction between polymer compounds and processing machinery, and reduce equipment wear , A lubricant that enables smooth extrusion molding. The quality of wood-plastic lubricants has a great influence on the service life of molds, barrels and screws in wood-plastic processing, 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. Influence. However, if the presence of stearate in wood-plastic lubricants is combined with MAH-use, the cross-linking effect of maleic anhydride will be weakened, and the efficiency of cross-linking agent and lubricant will be reduced.

The selection of wood-plastic lubricants considers the following requirements:

It has good compatibility with resin at high temperature, can produce a certain plasticizing effect, reduce the cohesive energy of the molecules in the resin, weaken the friction between the molecules, reduce the melt viscosity of the resin, improve the melt fluidity, and promote the resin Sliding of particles, etc.

Professional wood-plastic lubricants are multi-functional, the purpose is to make the processing equipment play the best operating characteristics, increase output, and improve product quality:

1. Intermolecular interaction of polymer/polymer.

2. Speed up the plasticizing effect.

3. Reduce melt viscosity.

4. Reduce torque and energy consumption.

5. Interface interaction of polymer/filler

6.Promote the dispersion of wood flour or natural fiber fillers.

7. Contribute to the wetting of the filler.

8.Lubricate the filled polymer and the heated or cooled metal interface.

9.Improve the demouldability of the material in the extrusion barrel and the die surface.

10.Reduce friction and wear.

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 foaming agent supplier, if you need it, please contact us.

Classification of pvc stabilizers

Broadly speaking, all additives that can improve the thermal stability of polymers are called thermal stabilizers. Due to the poor thermal stability of polyvinyl chloride, most of the PVC stabilizers in the world are used for polyvinyl chloride. Therefore, the PVC stabilizer usually refers to the heat stabilizer of polyvinyl chloride and its copolymers.

Generally classified according to the chemical composition of the heat stabilizer, it can be basic lead salt, metal soap, organotin, epoxy compound, phosphite, polyol, etc. According to the effect, PVC stabilizers can be divided into main stabilizers and auxiliary stabilizers. The auxiliary stabilizer itself has only a small stabilizing effect or no thermal stabilization effect, but it has a synergistic effect when used with the main stabilizer; the main stabilizer is generally a metal-containing heat stabilizer. Pure organic compounds such as epoxy compounds, phosphites, and polyols are generally used as auxiliary stabilizers.

Because to achieve good stability of polyvinyl chloride, it is often necessary to use multiple PVC heat stabilizers at the same time. Therefore, some commercial PVC stabilizers are compounded by multiple ingredients to become composite stabilizers, such as barium cadmium stabilizer, barium zinc stabilizer These composite stabilizers are usually added with lubricants and other additives needed for PVC processing to facilitate the use of users. There are many types of compound stabilizers, including powder, paste, and liquid.

Therefore, there are several categories of heat stabilizers:

1. Lead salt composite stabilizer

2. OBS organic-based stabilizer

3. Organotin stabilizer

4. Liquid composite stabilizer

5. Calcium and zinc compound stabilizer

6. Barium-zinc composite stabilizer

7. Potassium-zinc compound stabilizer

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. Our company's foaming agent for sale, if you need it, please contact us.

Tips about wood-plastic lubricants

Wood-plastic lubricants refer to the production and processing of wood-plastic composite materials (WPC): improve its processing fluidity, improve product appearance quality, ensure product physical properties, reduce the friction between polymer compounds and processing machinery, and reduce The abrasion of the equipment is a lubricant that enables smooth extrusion and molding. The quality of wood-plastic lubricants has a great influence on the service life of molds, barrels and screws in wood-plastic processing, 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. Influence. However, if the presence of stearate in wood-plastic lubricants is combined with MAH-use, the cross-linking effect of maleic anhydride will be weakened, and the efficiency of cross-linking agent and lubricant will be reduced.

Professional wood-plastic lubricants are multi-functional, the purpose is to make the processing equipment play the best operating characteristics, increase output, and improve product quality:

1. Intermolecular interaction of polymer/polymer;

2. Speed up the plasticizing effect;

3. Reduce melt viscosity;

4. Reduce torque and energy consumption;

5. Interface interaction of polymer/filler;

6. Promote the dispersion of wood flour or natural fiber fillers;

7. Contribute to the wetting of the filler;

8. Lubricate the filled polymer and the heated or cooled metal interface;

9. Improve the demouldability of the material in the extrusion barrel and the die surface;

10. Reduce friction and wear;

Generally speaking, the amount of lubricant used in wood-plastic composites (WPC) is twice that of ordinary plastics. For wood-plastic composite materials with a wood fiber content of 50% to 60%, the amount of lubricant for HDPE-based materials is 4% to 5%, the amount of lubricant for PP-based materials is 1% to 2%, and the amount of lubricant for PVC-based materials is lubricated. The dosage of the agent is 5%~10%; but the actual dosage may be adjusted according to the different formulations and processes of the enterprise.

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 agent supplier, if you need it, please contact us.

Features of microsphere foaming agent

Expandable microsphere foaming agent is a new type of special foaming agent produced in Japan. Expandable microsphere foaming agent is a kind of milky white tiny spherical plastic particles with a diameter of 10-45 microns. When heated to a certain temperature, the volume of the foaming agent can rapidly expand to several tens of times of itself, so as to achieve the foaming effect. When heated to a certain temperature, the thermoplastic shell softens and the gas inside the shell expands, and the volume of the foaming agent can be increased to several tens of times by itself, while the core-shell structure is not destroyed, so as to achieve the foaming effect.

Performance characteristics of expandable microsphere foaming agent:

1. Good mechanical properties:

Unlike other types of foaming agents, the expandable microsphere foaming agent has no cells, thereby avoiding the disadvantages of uneven cells, cell rupture, and poor cell resilience. The complete spherical structure ensures good mechanical properties.

2. Wide foaming temperature range, easy to process

The foaming temperature ranges from 70°C to 200C, and the most suitable type of microspheres can be selected according to various processing temperatures and process requirements.

3. Excellent flexibility:

The thermoplastic shell has excellent pressure resistance, the surface can withstand a pressure of 300 kg/cm², and its good resilience can withstand multiple cycles of pressurization/pressure relief without breaking.

4. Excellent foaming performance:

It can have an independent foaming effect that is 20-70 times the original, and it is still a complete closed body after foaming, with a foaming effect that traditional chemical foaming agents can't match.

5. Environmental performance:

Polymer microspheres are non-toxic and non-polluting, and can be used as environmentally friendly foaming agents in high-end products and high value-added products.

6. Diversity to choose from:

Customers can choose products with different foaming requirements according to their actual needs.

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 also a meltblown additives manufacturer, if you need it, you can contact us.

Do you know electret masterbatch

Electret masterbatch is a special functional masterbatch used with electret equipment. With the rapid spread of the global epidemic, the market demand for melt blown cloth has surged. With the massive increase in the production capacity of 95 and 99 melt blown cloth, As one of the important raw materials for the production of meltblown cloth, the production capacity of high-end electret masterbatches has also begun to be in a hurry. Since the outbreak of the new crown epidemic in 2020, masks have been an indispensable daily necessities in this environment, and they have also pushed masks to the forefront, causing the market's mask prices to skyrocket and sell out.

To put it simply, the electret masterbatch is a special functional masterbatch for meltblown cloth. The principle of action: a micron-level powder compounded by dispersant. It has the function of producing electric ions and storing electric charges. Under the action of the initiator, the magnesium-lithium tourmaline permanently releases electric charges and negative air ions, which increases the ability of the mask to absorb electrostatically and sterilize negative ions, and effectively block droplets, dust, and viruses below micrometers etc.

After the electret is heated and pressurized, the discharge performance of the magnesium lithium tourmaline will be further strengthened, and the effect will be doubled every ten degrees of temperature increase, and the finer the fineness, the more static electricity is generated, and the adsorption capacity is also enhanced.

Medical masks are generally divided into three layers: the first layer is a waterproof and sterile layer, the second layer is a filter electret layer, and the third layer is a water-absorbing and skin-friendly layer. The main function of virus filtering for masks is the extremely fine and electrostatically charged middle layer filter cloth-meltblown non-woven fabric.

The second layer of electret melt-blown cloth with electret masterbatch and high-voltage piezoelectric treatment is the most important part. The melt-blown cloth will only be charged after electret treatment, so that it will be charged to the same charged The 0.3 micron virus particles have an efficient adsorption effect. To allow this static electricity to be stored, the material composition and structure are required to allow the electret to facilitate charge retention. In the process of electrostatic storage and charge retention, the addition of electret masterbatch plays a vital role. Its magic is that adding a small amount of electret masterbatch can increase the density and depth of the charge trapping energy trap in the meltblown nonwoven fabric, effectively release negative ions and store charges to improve the comprehensive filtration of the meltblown nonwoven fabric. Effectiveness and resistance to thermal degradation. Under the condition of the same fiber fineness and gram weight, it can reduce the resistance of non-woven products and improve the filtration efficiency of non-woven products.

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 manufacturer of meltblown additives, if you need it, please contact us.

The working principle of electret masterbatch

Electret masterbatch is a kind of resin material modified functional masterbatch. Its product is based on high-quality polypropylene as the main substrate; at the same time, it uses high polymer resin, polymer resin, high crystalline resin, nucleating agent, and high-quality initiator. And many other high-quality resins are mixed and modified and granulated. The characteristic of its product is that after adding a small amount of electret masterbatch in the production and processing process, the resin material of the product can be quickly dispersed evenly, and the charge molecules in the electret masterbatch can effectively increase the charge trapping energy trap in the meltblown non-woven fabric. Density and depth, in addition, it can effectively release negative ions and store charges; thereby improving the comprehensive filtration efficiency and thermal attenuation resistance of the meltblown non-woven fabric. Under the same fiber fineness and gram weight, it can reduce the resistance of non-woven products and improve the filtration efficiency of non-woven products.

Principle of action:

1. Micron-level powder compounded by dispersant. It has the function of producing electric ions and storing charges. Under the action of the initiator, the magnesium-lithium tourmaline releases electric charges and air-led ions, which increases the ability of the mask to absorb electrostatically and sterilize negative ions, and effectively block droplets, dust, and viruses below micrometers.

2. After the electret is heated and pressurized, the discharge performance of the magnesium-lithium tourmaline will be further strengthened, and the effect will be doubled every ten degrees of temperature increase, and the finer the fineness, the more static electricity is generated, and the adsorption capacity is also enhanced. Add effects.

3. Adding a small amount of electret masterbatch can increase the density and depth of the charge trapping energy trap in the meltblown non-woven fabric, effectively release negative ions and store charges, and improve the comprehensive filtering effect and resistance of the meltblown non-woven fabric. Thermal decay performance. Under the condition of the same fiber fineness and gram weight, it can reduce the resistance of melt-blown non-woven products, and at the same time improve the filtering effect of melt-blown non-woven products.

In the electret process:

Using high-voltage charging, reducing the charging distance, appropriately extending the charging time or using high-temperature electricity, heat treatment after electret, etc., can improve the charge storage stability of the material to a certain extent. At the same time, attention should be paid to keeping the material sealed and avoiding direct contact with humid environmental conditions to a certain extent, which helps to maintain the charge stability of the material.

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 also a supplier of Meltblown additives. If you need our products, please contact us.

Tips about AC foaming agent

Azodicarbonamide is traded as AC foaming agent or ADC foaming agent (Foamer ADC). It is a white or light yellow powder, non-toxic, odorless, non-flammable, and self-extinguishing. Soluble in alkali, insoluble in gasoline, alcohol, benzene, pyridine and water.

Azodicarbonamide is a kind of foaming agent commonly used in industry. It can be used in the production of yoga mats and rubber soles to increase the elasticity of products. It can also be used in the food industry to increase the strength and flexibility of the flour dough.

The raw material hydrazine hydrate used in the production process is highly corrosive and highly toxic. It can corrode glass, rubber, leather and cork. Vapors and liquids can corrode the skin, eyes, nose, throat and mucous membranes. The production equipment should be sealed to prevent direct contact with the human body. Acute toxicity: use plastic-lined paper bags or cardboard drums for airtight packaging. Store in a cool, ventilated warehouse. Keep away from fire and heat sources. Avoid direct sunlight, keep away from open flames and heat sources. It should be stored separately from oxidants, acids and alkalis, and mixed storage and transportation should not be avoided.

Transportation precautions: During the iron transportation, ensure that the container does not leak, collapse, fall, or be damaged. Mixed shipment and transportation with oxidants, acids, alkalis, etc. is strictly prohibited. Avoid exposure to the sun, rain, and high temperature during transportation. Stay away from fire and heat sources during stopovers. After the vehicle is transported, it should be thoroughly cleaned, and it is forbidden to drop off during railway transport.

It can be used as a foaming agent to foam a variety of foam plastics, such as PVC, EVC, PP, PE, PS and other plastics. The ultra-fine powder is suitable for the foaming of plastic products with high requirements, dense and uniform pore size in imitation leather, artificial leather and EVA shoe materials. The products using azodicarbonamide have good elasticity, uniform bubble diameter and good strength. It can also be used in the food industry to increase the strength and flexibility of the dough, has a bleaching effect, and can also make bread look better. According to China's "GB2760-2011 Standard for the Use of Food Additives", azoformamide is a legal food additive and can be used as a flour treatment agent in wheat flour. The maximum use amount is 0.045g/kg.

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. We are Processing Aid K128P manufacturer, if you need it, please contact us.

Classification and function of plastic additives

Commonly used additives for plastics can be roughly divided into the above three categories. In the narrow sense, additives actually refer to processing aids and functional additives, and do not include fillers. Next, we will give you a detailed introduction to each type of additives. Plastic processing additives can be divided into three categories based on their uses:

(1) Lubricant: The role of lubricant is to reduce the friction between materials and the surface of materials and processing equipment, thereby reducing the flow resistance of the melt, reducing the viscosity of the melt, improving the fluidity of the melt, and avoiding the melt and the equipment Adhesion to improve the surface finish of the product.

Lubricants can be divided into internal lubricants and external lubricants according to their functions. The essence is what we usually call plasticizers and mold release agents. It's just that they are called differently in different resins. For example, plasticizers are usually used more in the processing of pvc resins, and the essence is also the effect of internal lubrication. The distinction between internal and external lubricants is mainly based on their compatibility with resins. The internal lubricant has a high affinity with the resin, and its role is to reduce the force between macromolecules; the external lubricant has a small affinity with the resin, and its role is to reduce the friction between the resin and the processing machinery.

(2) Heat stabilizer: During the processing and molding process of plastics, heat will be generated due to heating, friction or shearing, or the performance of plastic products will deteriorate due to heat during use. In order to prevent the degradation and aging of the plastic when heated, it is necessary to add a substance that will not cause decomposition and change when the plastic is heated. This substance is called a heat stabilizer. Mainly used in the processing of PVC resin.

Pure PVC resin is extremely sensitive to heat. When the heating temperature reaches above 90°C, slight thermal decomposition will occur; when the temperature reaches 120°C, significant thermal decomposition will occur, making the color of PVC resin gradually darker. The thermal degradation mechanism of PVC is very complicated, but the essence of the thermal decomposition reaction of PVC is a series of reactions caused by the HCl removal reaction, which finally leads to the rupture of macromolecules.

(3) Foaming agent: The so-called foaming agent is a substance that makes the target substance pores. It can be divided into three categories: chemical foaming agent, physical foaming agent and surfactant. Chemical blowing agents are those compounds that can release two CO2 and N2 gases after being heated and decomposed, and form pores in the polymer composition; physical blowing agents are the physical form of the foam pores through a certain substance The change is formed by the expansion of compressed gas, the volatilization of liquid or the dissolution of solid; foaming agents have high surface activity, can effectively reduce the surface tension of the liquid, and are surrounded by the arrangement of the double electron layer on the surface of the liquid film Air forms bubbles, and then a single bubble forms foam.

Product application of calcium zinc stabilizer

The appearance of calcium zinc stabilizer is mainly white powder, flake and paste. Powdered calcium-zinc stabilizer is used as the most widely used non-toxic PVC stabilizer, commonly used in food packaging, medical equipment, wire and cable materials, etc. At present, PVC calcium-zinc stabilizers that can be used for rigid pipes have appeared in China.

The thermal stability of powdered calcium-zinc stabilizer is not as good as that of lead salt, and it has certain lubricity, poor transparency, and easy to bloom. In order to improve its stability and transparency, antioxidants such as hindered phenols, polyols, phosphites and β-diketones are often added for improvement.

The two systems of calcium zinc stabilizers are mainly divided into hydrotalcite system and zeolite system.

Applications:

CH400, CH401, CH402 calcium-zinc composite heat stabilizer is an environmentally friendly, high-efficiency, multifunctional liquid calcium-zinc composite heat stabilizer. Excellent thermal stability and transparency, it will not cause surface precipitation and migration when used in PVC products, and it is more effective when used together with heat-resistant oil, epoxy methyl ester, and epoxy soybean oil. It is suitable for PVC slurry processing, and is widely used in PVC processing technology such as slush molding, plastic coating, and dipping.

The product not only has good compatibility and viscosity control, but also provides good initial coloring and color retention. This product has proven to be an excellent heat stabilizer. Good compatibility, low volatility, low migration, good light resistance, suitable for PVC products industries such as soft pipes, granulation, calendered film, toys, conveyor belts, advertising cloths, wallpaper, etc.

(1) It can replace organotin stabilizers and lead salt stabilizers to meet the environmental and sanitary requirements of non-toxic wires and cables.

(2) It has excellent initial whiteness and thermal stability, and is resistant to vulcanization pollution.

(3) It has good lubricity and unique coupling effect, endows the filler with good dispersibility, enhances the package with resin, improves product performance, reduces mechanical wear, and prolongs the service life of equipment.

(4) It has both toughening and melting promotion effects, and good plasticizing fluidity.

(5) It can give the PVC mixture good uniform plasticization and high-speed melt fluidity, and make the surface of the product smooth.

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. Our company has advanced technology and rich production experience. If you are interested in our products, please contact us.

Advantages of calcium and zinc stabilizers

At present, the world's PVC heat stabilizers mainly include lead salts, composite calcium and zinc, organic tin, organic antimony, organic auxiliary heat stabilizers, and rare earth compounds. The largest output is still the traditional lead salt stabilizers and calcium-zinc composite stabilizers. Our country is currently dominated by these two types of stabilizers. With the development of the industry’s lead removal, calcium-zinc stabilizers have basically become our country’s PVC stabilizers. The direction of development.

So what are the advantages of calcium and zinc stabilizers?

1. Green and environmental protection

There is no heavy metal elements (lead, barrier), which can meet the requirements of the latest environmental protection standards of various countries (such as the EU RHOS directive, REACH directive, etc.).

2. Resistance to vulcanization pollution

In the field of PVC door and window profiles, the use of composite lead heat stabilizers in parts of northern my country (a large amount of sulfur-containing coal causes acid rain) is prone to blackening, while calcium-zinc heat stabilizers will not be polluted.

3. Good system switching characteristics

When the traditional composite lead thermal stabilizer is converted to an organotin thermal stabilizer, cross-contamination will occur, resulting in high system switching costs. However, the calcium-zinc thermal stabilizer does not react with these two thermal stabilizers, and the mutual switching cost is low.

4. The density is low, and the amount of calcium carbonate can be appropriately increased to reduce the cost

Compared with the composite lead heat stabilizer, the density of the calcium-zinc heat stabilizer itself is about 40% lower, and the weight of the PVC product is reduced by about 2% on average only by switching the heat stabilizer.

It has good dispersibility, compatibility, processing fluidity, wide adaptability, excellent surface finish with PVC resin during processing; excellent thermal stability, small initial hue, no segregation; no heavy metals and other toxic components , No vulcanization; Congo red has a long test time, has excellent electrical insulation, no impurities, and has high efficiency and weather resistance; wide application range, strong practicability, low dosage, and versatility; in white products, whiteness Better than its similar products.

Variety specifications and uses

According to different uses, there are different varieties of calcium-zinc composite stabilizers: CZ-1, CZ-2, CZ-3, etc., which are used for pipes, profiles, pipe fittings, plates, injection molding, blown film, cable materials and other plastic products.

JOYSUN is a technical service provider and promoter in the field of plastics and rubber. Our vision is to be a sustainable new material and new auxiliary enterprise. We have advanced technology and excellent product quality. If you need it, please contact us.

Characteristics of microsphere foaming agent

When heated to a certain temperature, the thermoplastic shell softens and the gas inside the shell expands, and the volume of the foaming agent can be increased to several tens of times by itself, while the core-shell structure is not destroyed, so as to achieve the foaming effect.

Performance characteristics of expandable microsphere foaming agent:

1. Good mechanical properties:

Different from other types of foaming agents, the expandable microsphere foaming agent has no cells, thereby avoiding the disadvantages of uneven cells, cell rupture, and poor cell resilience. The complete spherical structure ensures good mechanical properties.

2. Wide foaming temperature range, easy to process:

The foaming temperature ranges from 70°C to 200°C, and the most suitable type of microspheres can be selected according to various processing temperatures and process requirements.

3. Excellent flexibility:

4. Excellent foaming performance:

It can have an independent foaming effect up to 50-150 times the original, and it is still a complete closed body after foaming, with a foaming effect that traditional chemical foaming agents can't match.

5. Environmental performance:

The polymer microspheres are non-toxic and pollution-free, and can be used as environmentally friendly foaming agents in high-end products and high value-added products.

6. Diversity to choose from:

Customers can choose products with different foaming requirements according to their actual needs.

Expandable microsphere foaming agent is simple to use, add it to the formula, mix and stir evenly, without adjusting the original process, the addition amount is generally 1-3% according to the industry and the effect achieved.

JOYSUN company was established in 2005, focusing on Foaming agents. Welcome to contact us to talk more about your business, thank you!

What is OBSH foaming agent

OBSH foaming agent is a special foaming agent for rubber, which has the characteristics of uniform nucleation, fine and uniform foaming pore size. OBSH foaming agent decomposes stable gas components and can obtain products with good cell structure. It is a high-quality foaming agent for rubber products. OBSH foaming agent has no induction period for decomposition, fast decomposition speed, gentle outgassing and no sudden and other characteristics. Makes the foaming process easy to control.

OBSH is far more expensive than blowing agents AC and H, but its decomposition temperature is lower and can be used for polymers processed within its decomposition temperature range. It also has some other characteristics and occupies a certain position in the processing field of rubber and plastic materials.

It is mixed with foaming agent AC with a decomposition temperature of one low and one high, and the amount is 10-50% of AC. It is used in many foaming formulations of PVC and PE. OBSH plays the role of activating AC. Its decomposition heat is greater than AC (AC exothermic 41.84 kJ/mol), which promotes the complete decomposition of AC below the normal decomposition temperature, the product surface is not yellow, and the cell structure is uniform. The made wallpaper has a look and feel of suede, and the whiteness is very high (can reduce the amount of white powder).

Compared with blowing agent H, OBSH has a small heat release, which is beneficial to control the closed-cell foaming of thick-layer PVC, and will not accumulate heat to cause central coking. Color sponge.

It is also widely used in the production of sponge sheets, carpet linings, furniture coverings such as armrests, cushions, car door seals, shoe soles, gymnastics mats and floats. OBSH pyrolysis does not produce ammonia, so it does not corrode the mold made of sensitive copper, and the product has no peculiar smell. However, due to its pyrolysis will generate moisture, it cannot be used in water-sensitive formulations. In addition, it has a slight inhibitory effect on isoprene, styrene-butadiene, butyl, butadiene rubber and other rubbers, so attention should be paid when using it.

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 PE WPC Lubricant & Compatilizer factory. If you are interested in our products, please contact us.

#OBSH foaming agent

The role of processing aids

The role of processing aids：

Due to the poor ductility of PVC melt, it is easy to cause melt fracture; PVC melt relaxes slowly, which easily causes the surface of the product to be rough and dull Ze and shark skin, etc. Therefore, it is often necessary to add processing aids during PVC processing to improve the above-mentioned defects of its melt.

Processing aids are additives that can improve the processing performance of resins. There are three main ways of action: promoting resin melting, improving melting body rheological properties and lubrication function.

1. Promote resin melting: When PVC resin is heated and melted under a certain shear force, the processing modifier is the first. It melts and adheres to the surface of the PVC resin particles. Its compatibility with the resin and its high molecular weight increase the viscosity and friction of the PVC, thereby effectively transferring the shear stress and heat to the entire PVC resin and accelerating the melting of the PVC.

2. Improve melt rheological properties: PVC melt has the disadvantages of poor strength, poor ductility and melt fracture, while processing modifiers can improve the above-mentioned rheology of the melt. Its mechanism of action is to increase the viscoelasticity of PVC melt, thereby improving mold release expansion and increasing melt strength.

3. Provide lubricity: the compatible part of the processing modifier and PVC is first melted to promote melting, but is not compatible with PVC. The content part migrates out of the molten resin system, thereby improving mold release.

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. Our vision is to be a sustainable new material and new auxiliary enterprise. In addition, we are also a PVC Ca-Zn stabilizer supplier, if you need it, please contact us.

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.

#wood-plastic lubricant processing #JOYSUN

The role of electret masterbatch

Under the epidemic situation, masks have become a necessity. As the core of the mask, the meltblown cloth is essential to maintain long-term effectiveness. The addition of electret masterbatch to the meltblown cloth can well extend its validity period. Why must electret masterbatch be added to the meltblown material? What is the role of electret masterbatch? The editor of Sino-Singapore Huamei will answer for you.

The biggest role of electret masterbatch is to help the melt blown cloth that meets the N95 standard to store charges and extend its validity period. Electret treatment of the meltblown cloth is equivalent to charging the meltblown cloth, storing more electric charges, and making the filtration efficiency of the meltblown cloth ≥95%.

The core material of electret masterbatch is a charge initiator. According to different types of charge initiators, electret masterbatches on the market can be divided into two categories: one is organic electret masterbatch, and the other is inorganic Class of electret masterbatch.

The organic electret masterbatch is transparent in appearance, looks very beautiful, and the filter performance is very good in all aspects, but it also has some shortcomings, for example, the electrostatic field is extremely unstable, which will cause instability in rate and efficiency, and organic The attenuation of the charge on the material will also cause the rate-effect attenuation. So far, no charge initiator of organic materials has been found that can store the charge for more than three months without attenuation! When the inorganic charge initiator reaches 1% in the final product, its charge storage capacity can reach more than 12 months without decay.

More importantly, after adding the electret masterbatch, the melt blown cloth filter has a long-term effect of more than 1 year, high charge retention rate and good stability.

It is worth noting that the effect of electret is related to polypropylene raw materials, production process, fiber size, weight, electret equipment, electret power supply voltage, etc., and can be used in batches only after the actual trial test is qualified.

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 also a foaming agent manufacturer, if you need it, please contact us.

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

Advantages of foaming agent

The plant-based cement foaming agent is made of imported high-quality natural plant polymer materials as raw materials, and is formed through a series of complex chemical reactions. The product is a light yellow pure and transparent oily liquid. Insensitive to hard water, non-toxic, odorless, and non-sediment. The pH value is close to neutral, non-corrosive to cement and metals, and does not pollute the environment. The foaming agent is storage-resistant, hard to deteriorate, has excellent foaming performance, is rich in foam, and has moderate foam stability. Using this foaming agent to make foamed cement has the characteristics of low consumption, low cost and stable quality. Each barrel of foaming agent (200kg) can produce about 500 cubic meters of foamed cement, so it is widely used in floor heating projects and In roof insulation projects, construction costs can be significantly reduced.

Animal cement foaming agent is made of selected animal (bovine, sheep) keratin protein as the main raw material, after a series of hydrolysis reactions, heating and dissolving, diluting, filtering, and shrinking at high temperature. It is produced by foaming equipment and manufacturing process. The production process implements strict quality management. The product is dark brown viscous liquid, low impurity content, light irritating odor, uniform quality, good quality consistency, good foaming and excellent The foam stability is a new generation of animal cement foaming agent. Due to the high surface strength of the foam produced by the foaming agent, the foam is extremely stable, and the foamed cement made with it is in a mutually independent closed state, and the foamed cement product is not connected to the bubbles. The permeability resistance of the foamed cement product is very high. good.

1. Under the same density, compared with foamed cement made with vegetable foaming agent, it has better sealing and heat preservation and higher strength.

2. Due to its excellent foam stability, the thickness of the foamed cement poured at one time can reach more than 1.5 meters without collapsing, so it is suitable for the production of foamed bricks, lightweight boards and lightweight walls.

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 professional OBSH foaming agent factory, if you need it, please contact us.

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