Effect of CPE with different impurity particle number on PVC modification: Impurities in CPE usually refer to particles in CPE that are not plasticized or difficult to plasticize, such as hyperchlorinated CPE, yellow discolored particles, mixed with other material impurities, etc., which can usually be found by CPE spot pressure film test. This impurity particles exist in every manufacturer, but how much to say, because the reaction is not entirely possible in the chlorination reaction, the reaction time will be long, and the reaction kettle will not be clean, so this is the manufacturer's production process problem.  

ProFlame® RTF-100   Sb2O3 is commonly used as synergist in halogenated FR systems. But as antimony reserves worldwide are decreasing, Sb2O3 price is rising all the way up. Consequently, the cost for FR- treated products is also rising, compressing the profit margin for manufacturers.RTF-100  is  an  replacement  of  Sb2O3.  It  can  replace  Sb2O3  in halogen-antimony FR systems in an effective way with lower cost.   Physical and Chemical Index: Product name                        RTF-100 Whiteness,%                           >95 Average Particle size,um  0.6-1.1 Moisture,%                          <0.1 As2O3,%                           <0.04 PbO,%                               <0.065 Fe2O3,%                               <0.004 Se,%                              <0.0015 CuO,%                               <0.0035  

Effect of CPE with different ash mass fraction (ash) on PVC modification: In order to prevent CPE from caking, the line label stipulates that no more than 5% calcium powder can be added to CPE as a spacer. The regular manufacturers use mostly ultra-fine light calcium carbonate, which has high fineness, good dispersion effect, and can effectively and evenly cover the surface of CPE particles, playing a good isolation and anti-caking role. Although it is true that there will be a little dust in the sensory touch, it does not affect the toughness, tensile strength, plasticizing performance and other indicators of CPE, and can be used with confidence.   In recent years, in order to fill up and reduce costs, some manufacturers began to use granular calcium as a CPE isolator, granular calcium is composed of 85% calciu

Effect of CPE with different particle size (screen residue) on PVC modification: Chlorination process, grinding and so on have a great relationship, CPE too thick or too fine have a certain impact on PVC modification effect. The suspension chlorination of CPE is a heterogeneous reaction, and the particle size of PE has a significant effect on the uniformity of chlorination. If the particle size is small, the specific surface area of the particles is large, the chlorine atoms are easy to penetrate into the particles, and the chlorination is more uniform. If the particle is too coarse, the infiltration of chlorine into the particle is difficult, and the chlorination is not uniform. It was found through experiments that the thickness of CPE particles produced fr

Effect of CPE with different chlorine content on PVC modification: The compatibility of CPE with PVC depends on the chlorine content of CPE and the distribution of chlorine atoms on the PE molecular chain. The amount of chlorine in CPE has a great influence on the modification effect of PVC. After chlorination of the same polyethylene raw material, different chlorine content has different modification effect on PVC. CPE with chlorine content below 25% is not compatible with PVC, so it is not suitable for PVC modification. CPE with a chlorine content of more than 40% has excellent compatibility with PVC, and can be used as a plasticizer for PVC, not suitable for use as an impact modifier; CPE with a chlorine content of 35 ~ 36% has low crystallinity and glass conversion temperature, good elasticity and compatibility with PVC, and is widely used as an impact modifier for hard PVC products.

Effect of CPE with different Mooney viscosity on PVC modification: Although the CPE industry standard, Mooney viscosity has no requirements for plastic modification materials, but the Mooney viscosity of CPE can reflect the molecular mass of CPE, CPE molecular mass has a significant impact on its physical properties, such as material fluidity, aging resistance, strength and so on. High molecular quality is the product strength is high, but the molecular mass is too large, the viscosity is too large, will make the CPE modified PVC need a higher processing temperature to form, the processing temperature is too high, not only to bring difficulties to the processing process, but also to the quality of the product itself. Therefore, to ensure the physical properties of the product, the PE molecular quality is not required to be too high. The molecular weight of HDPE, a special raw material for CPE, is usually controlled at 100,000 to 150,000. The molecular mass of PE was characterized by the melt flow rate of PE, which was inversely proportional to the molecular mass. CPE Mooney viscosity can also reflect the molecular weight of CPE, high Mooney viscosity of CPE molecular weight is large, low Mooney viscosity of CPE molecular weight is small.

Effect of different volatile CPE on PVC modification: CPE manufacturers generally use aqueous phase (acid phase) suspension chlorination process, in the chlorination reaction process, some hydrogen atoms in polyethylene molecules are replaced by chlorine atoms, resulting in chlorinated polyethylene and hydrogen chloride. Since the production of CPE is carried out in suspension and hydrogen chloride is produced during this process, the volatiles in CPE products contain both water and hydrogen chloride gas that evaporates from inside CPE molecules at high temperatures. Hydrogen chloride has a catalytic effect on the decomposition of CPE, especially PVC, which will greatly accelerate the decomposition and dehydrochlorination reaction, and aggravate the degradation of PVC macromolecules and the cross-linking of broken chain molecules, thus affecting the processing and mechanical properties of PVC products [3]. Practice has shown that the volatile fraction of CPE products has a great impact on the physical properties and processing properties of CPE and PVC blends, so the volatile fraction of CPE is a very important technical quality index of chlorinated polyethylene.

ProFlame® PNPO-766 （AP766）     PNPO-766   is   a   kind   of   Halogen-Free   flame   retardant   ,   which   develops   its effectiveness through phosphorus/nitrogen synergism.When the polyolefine on exposure to flame, the carbon foam layer formed protects the polymer through its heat insulating effect to reduce further oxygen access and prevent dripping of the polymer. At the same time there are no halogen hydride gases to cause.     Benefits ►Particularly effective in thermoplastic polyolefins, urethanes (e. g. integral skin foams, rigid foams, sealants), and epoxy resins (adhesives, sealants, structural laminates, gelcoats) ►Positive secondary fire effects such as low smoke density, lower formation of toxic smoke ►Non-halogenated flame retardant with favorable environmental and health profile     Technical Data: Items                                                                                              Spec Appearance                                                                 White free-flowing powder P content, %                                                            &nbs

Polyvinyl chloride (PVC) is widely used in chemical industry, building materials and other fields because of its advantages of high strength, flame resistance and chemical corrosion resistance, and is the second largest general plastic in the world today. However, the toughness of PVC is low, so that its application is limited, so it must be toughened and modified. The commonly used impact modifiers for PVC profiles are chlorinated polyethylene (CPE) and acrylic ester (ACR) impact modifiers. Due to the high cost performance of CPE, more than 80% of domestic PVC-U products use CPE as impact modifier. The effect of CPE toughening and modifying PVC is mainly related to the CPE raw material, chlorine content and preparation conditions, and the best toughening effect is when the dosage of CPE is 6 ~ 15 parts. CPE raw material HDPE high molecular weight, generally slow plasticizing, toughening effect is good; Low  molecular weight, general plasticizing fast, suitable for high-speed extrusion. When used for toughening and modifying PVC-U products, CPE has superior comprehensive properties when the chlorine content is about 36%. The practice shows that the main performance indexes of CPE have an effect on the modification effect of PVC profile, especially the distribution of chlorine atoms on the molecular chain of CPE and the melting enthalpy indexes have a great effect on the physical properties and processing properties of CPE and PVC blends. Therefore, HG/T 2704-2010 "Chlorinated polyethylene" indust

7. Homogenization and Controlled Molding Stage   Working component: mold   The homogenized melt is pushed to the mold by the extruder and molded into the desired shape, such as sheet, tube or film through the mold. The mold design depends on the shape and specifications of the final product.   8. Cooling and Solidification Stage   Working component: water bath, cooling fan   The extruded product is quickly cooled and solidified by the cooling system to maintain its shape and dimensional stability. Cooling methods include water bath cooling, air cooling, etc.   9. Cutting and Post-processing Stage   After the cooling stage, the solidified plastic can be further processed, especially in plastic modification applications. At this stage, precision becomes critical. The solidified plastic goes through a cutting process, usually done by specialized equipment such as a granulator, to ensure that the resulting pieces or pellets are uniform in size. The choice of cutting into small pieces or pellets depends on the specific requirements of the application. The processed material is then collected and used in downstream manufacturing processes.   Conclusion   Twin-screw extruders are widely used in plastic processing and modification. Their excellent mixing, melting and reaction capabilities enable them to process various types of plastics and give them new properties, and improve the comprehensive performance of materials. Plastic pellets made by twin-screw extruders can meet the needs of different application fields.   NOVIST has long been engaged in the development and sales of additives products in the PVC industry, as well as market promotion. We can provide customers with a full set of PVC products solutions, from the start-up of the testing machine to production formula adjust

The twin screw extruder has traditionally been used to produce pellets so that the material can be continuously fed into secondary processing equipment, such as injection molding machines or single-screw extruders.  In addition, twin-screw extruders can also produce films, fibers, sheets pipes, profiles..., which is called direct extrusion. The two forms of products are obtained through basically the same production steps.    Based on this, this article mainly introduces how twin-screw extruders work so that you can understand the production of products.   Demand for Plastic Compounding and Pelletizing:   Twin screw extruders are mainly used for compounding and pelletizing of some plastic products:   Flame-retardant plastics: PA6, PA66, PET, PBT, PP, PC and other materials are improved in flame retardancy by adding flame retardants   Highly filled plastics: PE and PP are filled with 75% CaCO3 to enhance rigidity and stability   Insulating plastics: Different additives (such as flame retardants, antioxidants, etc.) are evenly dispersed in the matrix resin to ensure the uniformity and stability of insulating plastics   Thermoplastic plastics: BPAT materials are compounded with materials such as PLA and EPS to have good toughness, ductility and high temperature resistance.   Thermosensitive materials: C-PVC products are added with heat stabilizers and lubricants to facilitate subsequent extrusion molding. The functionality of the material is ensured through precise temperature control   Degradable materials: PLA and PBAT, ESR and other degradable materials are modified to improve their elongation and other problems   How Does a Twin-Screw Extruder Work？   1. Material Intake   Working components: feed hopper, feed throat

2. Material Conveyance   Working components: screw, barrel   After the material enters the extruder barrel, it is conveyed along the barrel axial direction by the rotating screw. The conveying stage is mainly to convey the material from the feed port to the compression zone and start heating.   Non-meshing twin-screw extruders cannot form a closed or semi-closed cavity, and there is no positive displacement conveying condition. The material conveying mechanism is similar to that of a single-screw extruder.   Meshing twin-screw extruders mainly convey materials by forced conveying (positive displacement conveying). Different models of twin-screw extruders have different positive displacement conveying capabilities and slight differences in conveying mechanisms. The degree of positive displacement depends on the proximity of the flight of one screw to the relative flight of the other screw. Counter-rotating extruders with tightly interlocked screw configurations produce a significant level of positive displacement conveying characteristics.   3. Compression Stage   Plastic gradually starts to melt from a solid state in the compression section while being compressed. In this section, the plastic is subjected to the effects of compression ratio and barrel heating + friction heat, the material temperature rises quickly, the friction effect inside the material is large, and the compression effect is large.   4. Melting Stage   When the material enters the melting section, it gradually heats up and begins to melt under the action of the barrel heater. At this stage, the screw continues to rotate, further compressing and advancing the molten material. The rotation of the screw not only provides propulsion, but also makes the material evenly distributed in the screw groove through the design of the thread, thereby en

PVC foaming regulator is actually a special Processing Aids, they have all the characteristics of Processing Aids, the difference is that PVC foam regulator has a higher molecular weight, larger viscosity, they are mainly used to produce PVC foaming products. Depending on the function and application area, our PVC foaming regulators are divided into 4 classifications: 1) Foam regulator for 0-8mm thin foam board and foam shoes: TF-530, TF-869

EFXPS-701 is based on the environmental protection flame retardant B264YZ , and us esgeneral-purpose polystyrene GPPS as the carrier. Using a graft polymerization process, the dispersion efficiency and flame retardant efficiency are greatly improved. The dosage of flame retardant required to achieve the same flame retardant oxygen index is lower than that of HBCD flame retardant masterbatch, which also improves foam performance and reduces the density of the product; thereby greatly reducing the flame retardant cost of the extruded board. At the same time, this product has a high decomposition temperature, does not corrode equipment, has no decomposition loss during production and processing, and will not cause screw corrosion and flame retardant performance decline.   Tech Spec: Items                                   Spec FR Content                           ≥50 % Appearance                    White granules Volatile                                  ≤0.5 % Thermal decompostion Temp   ≥245 °C Particle size                           2-3 mm   Application: EFXPS-701 is mainly designed to provide self extinguishing properties for Polystyrene foams, especially for extruded foamed Polys

EFXPS-601 is based on the environmental protection flame retardant B843,and uses general-purpose polystyrene GPPS as the carrier. Using a unique graft polymerization process, the dispersion efficiency and flame retardant efficiency are greatly improved. The dosage of flame retardant required to achieve the same flame retardant oxygen index is lower than that of HBCD flame retardant masterbatch, which also improves foam performance and reduces the density of the product; thereby greatly reducing the flame retardant cost of the extruded board. At the same time, this product has a high decomposition temperature, does not corrode equipment, has no decomposition loss during production and processing, and will not cause screw corrosion and flame retardant performance decline.     Items                                  Spec FR Content                         ≥50 % Appearance                    White granules Volatile                                  ≤0.5 % Thermal decompostion Temp    ≥245 °C Particle size                             2-3 mm   Application: EFXPS-601 is mainly designed to provide self extinguishing properties for Polystyrene foams, especially for extruded foamed Polystyrene

The latest dynamics of the 2024-2030 global and China PVC additives market show that the market has continued to grow recently, and market participants are paying close attention to changes in production capacity, output, sales volume, sales volume, price and other aspects. On a global scale, the market share analysis of major players shows fierce competition. High molecular weight acrylic copolymer processing AIDS in the industry, such as GY-PA-530, are widely used in PVC foam, WPC products and other fields. Novista is a leading brand producer and supplier for plastics additives & polymers in China.   We can supply Acrylic Processing Aid, such as ACR901, ACR175, ACR401,ACR125,etc.

Chemical Name: 2,3-D

Since acrylate is a "core-shell" structural elastomer, it is endowed with a series of advantages: excellent impact resistance "core-shell" structure has better impact resistance than network structure polymers (CPE, EVA). In terms of glass transition temperature, CPE is -10℃ ~ -20℃, and acrylic ester can reach -56℃, so the low temperature impact performance is significantly better than CPE. The glass transition temperature of the newly developed TAE-858 can reach above -60℃, and the effect of improving the low temperature impact performance of profiles is remarkable. Wide processing process range, stable operation process CPE processing temperature range is narrow, because chlorinated polyethylene structure and PVC close, high temperature (185 ° C), good mixing, easy to damage the network structure, resulting in a decline in impact resistance. If the temperature is low, the plasticization is not good, the dispersion is not good, it also affects the impact, appearance and other properties, and the acrylic impact modifier does not have the above problems, the processing temperature is wide, the operation is easy, the finished product rate is high, the production is stable and the thermal shrinkage rate is low. Good dimensional stability The PVC profile using ACR impact modifier is generally 100℃, 60 minutes shrinkage is low, generally below 1.5%. The CPE is higher, generally more than 1.5% (standard requirements ≤2.5%). The practical significance of this project is to test the longitudinal stress of the PC profile. The influence factors of longitudinal stress are t

  PVC (Polyvinyl Chloride) is a versatile and widely used polymer in various industries due to its exceptional properties. However, PVC is inherently unstable and susceptible to degradation under heat, UV exposure, and other environmental factors.   To overcome this challenge, stabilizers are added to PVC formulations. In this article, we will delve into the benefits of calcium zinc stabilizers for PVC, exploring their product grades, applications, and key features.   Understanding Calcium Zinc Stabilizers:   Calcium zinc stabilizers are a type of stabilizer commonl

The selection of PVC impact modifier should pay attention to the following aspects: 1. The compatibility with PVC resin should be moderate, if the compatibility is too large, the two are completely mixed at the molecular level, the impact modifier may play the role of a plasticizer, closely attached to the PVC molecule, and the impact force directly acts on the PVC chain, which can not improve the impact resistance. On the contrary, if the compatibility of the two is too small to reach uniform dispersion, the adhesion to PVC is lost, and the impact force cannot be absorbed. 2. The glass transition temperature should be low, which can improve the impact resistance of PVC at low temperatures. 3. The molecular weight should be high, and it is best to mildly crosslink if necessary to improve the enhancement effect.

In the realm of PVC processing, the role of lubricants is crucial in improving the flowability of resin and facilitating easy demolding of products while preventing defects due to adhesion in machinery or molds. They are categorized into external and internal lubricants based on their mechanisms of action. Commonly used PVC lubricants include calcium stearate, oxidized polyethylene wax (OPE WAX), stearic acid, glycerol monostearate, paraffin wax, polyethylene wax (PE WAX), and more. These lubricants come in various forms such as flakes, powders, and beads to cater to different production processes and application methods. It is essential to note that the performance of PVC lubricants is primarily determined by factors like molecular weight and compatibility, rather than their appearance. In recent years, there has been a growing trend towards using powdered lubricants. So, what are the advantages of powder external lubricants over flake external lubricants? 1. Uniformity: Powder lubricants can be applied more uniformly on the surface of workpieces, ensuring a more even lubrication effect compared to flake lubricants, which may lead to uneven application. 2. Precision in Dosage: Powder lubricants allow for more precise control of the amount applied, reducing wastage. On the other hand, it might be challenging to control the dosage with flake lubricants. 3. Cleanliness: The thin film formed by powder lubricants on the workpiece surface is easier to clean and does not leave behind residues that flake lubricants might, thus reducing the cleaning effort. 4. Versatility: Powder lubricants are more versatile and suitable for a range of processes and materials compared to flake lubricants,

ProFlame-PN6131 is formulated flame retardant based on organic P-Si component. It is suited for both GF-reinforced and unreinforced PA66 and HTPA system. It exhibit high heat stability and no blooming. Product benefits: 1. Less gas, less mold corrosion 2. Good machinability, no mold scale 3. Low dosage,Polyamide compounds show very good physical properties and excellent electrical properties P-N system Prof

Product name: Diammonium phosphate Chemical Formula: (NH4)2HPO4 CAS Number: 7783-28-0 PN12049 Diammonium phosphate is used as a fertilizer. When applied as plant food, it temporarily increases the soil pH, but over a long term the treated ground becomes more acidic than before upon nitrification of the ammonium. DAP can be used as a fire retardant. It lowers the combustion temperature of the material, decreases maximum weight loss rates, and causes an increase in the production of residue or char. Specification Item

In the realm of PVC processing, the role of lubricants is crucial in improving the flowability of resin and facilitating easy demolding of products while preventing defects due to adhesion in machinery or molds. They are categorized into external and internal lubricants based on their mechanisms of action. Commonly used PVC lubricants include calcium stearate, oxidized polyethylene wax (OPE WAX), stearic acid, glycerol monostearate, paraffin wax, polyethylene wax (PE WAX), and more. These lubricants come in various forms such as flakes, powders, and beads to cater to different production processes and application methods. It is essential to note that the performance of PVC lubricants is primarily determined by factors like molecular weight and compatibility, rather than their appearance. In recent years, there has been a growing trend towards using powdered lubricants. So, what are the advantages of powder external lubricants over flake external lubricants? 1. Uniformity: Powder lubricants can be applied more uniformly on the surface of workpieces, ensuring a more even lubrication effect compared to flake lubricants, which may lead to uneven application. 2. Precision in Dosage: Powder lubricants allow for more precise control of the amount applied, reducing wastage. On the other hand, it might be challenging to control the dosage with flake lubricants. 3. Cleanliness: The thin film formed by powder lubricants on the workpiece surface is easier to clean and does not leave behind residues that flake lubricants might, thus reducing the cleaning effort.