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2021 / 09 / 15
Calcium-based stabilisers (including Ca-Zn ones) are now largely used in wires and cables, in window and technical profiles (also foamed ones), and in any type of pipes (such as soil and sewer pipes, foam core pipes, pressure pipes, corrugated pipes, land drainage pipes and cable ducting) as well as the corresponding fittings. Calcium-based stabilisers have also been introduced in PVC rigid calendering film production when improved organoleptics characteristics are required, for instance as alternative to tin mercaptides in transparent food packaging application or as alternative to tin carboxylates in PVC blown films shrinkable and for candy wrap. Similarly, calcium-based stabilisers are now an alternative to Liquid Mixed Metals (LMM) for several flexible applications, especially for the indoor ones, when stringent air quality requirements are in place.
Test methods on flame retardant
2021 / 09 / 11
Common flame retardant tests include combustion tests, limit oxygen index, glow wire tests, and smoke test. The purpose of the flame retardant test is to evaluate the burning characteristics of the material, that is, to test the sample using conditions that simulate actual combustion, and evaluate the burning characteristics of the sample from different dimensions such as ignitability, ignitability, fumes, and flammability. First. Burning test The combustion test refers to igniting the sample by means of an open flame, and comprehensively evaluating the flammability of the sample according to indicators such as burning speed, flame duration, and presence or absence of molten droplets. Because of its scientific evaluation method and universality, UL94 is widely used in flame retardant evaluation of various materials. Most of the combustion test standards are based on and improved based on the UL94 combustion evaluation method. Second, the limit oxygen index test The limiting oxygen index evaluates the flammability of the sample. Under the specified test conditions, the minimum oxygen concentration that can just maintain the material's combustion is determined. The test method is to fix the sample vertically in the combustion cylinder and fill it with a certain concentration of oxygen and nitrogen, ignite the top of the sample with an igniter, observe the sample combustion, and adjust the oxygen concentration accordingly, until the measurement sample just maintains the lowest level of equilibrium combustion. Oxygen concentration, expressed as a percentage of oxygen content. Third, the glow wire test
EEE Products that Use Flame Retardants
2021 / 09 / 11
The use of electrical and electronic equipment (EEE) is pervasive everywhere we live, work and do business. We rely on these products and devices to work properly-and safely-and we rarely think about how they are made. Flame retardants are incorporated into a wide variety of electrical and electronic products used by consumers, businesses, and the medical and transportation industries to meet fire safety standards. These include complex electrical and electronic devices that demand high performance electrical properties, but must also have important fire-resistant characteristics, such as those used in military applications. The diverse EEE applications and product uses, from the USB ports and insulated cables we plug into our computers to the printed wiring boards in the control panels of jets, all have different flame retardant needs. As a result, flame retardant solutions are carefully matched to the materials used in each application. Learn more about how flame retardants work. Some of the many examples of products that rely on flame retardants to achieve flammability standards include: Consumer electronics (i.e., smart phones, TV sets, DVRs, laptops) Communication and information technology (IT) equipment (i.e., microprocessors, computer servers, modems, printers, copy machines, fax machines, radio
Why are flame retardants still necessary?
2021 / 09 / 11
According to the National Fire Protection Association (NFPA), the number of reported fires in the United States decreased by seven percent from 2008 to 2009. In addition, between 1977 and 2009, civilian fire deaths declined from 7,395 to 3,010 respectively. Flame retardants have played a key role in reducing the incidence of fire. Unfortunately, despite the perceptions of some that fires are no longer a cause for concern, fire dangers continue to exist. The NFPA reported that in 2009: 1,348,500 fires were reported in the United States These fires caused 3,010 civilian deaths and 17,050 civilian injuries. All fires caused $12.5 billion in property damage. A fire department responded to a fire every 23 seconds. One civilian fire injury was reported every 31 minutes. One civilian fire death occurred every two hours and 55 minutes. Flame retardants have proven to work and continue to be an important component in the overall effort to address the dangerous consequences of fire, prevent fire-related injuries and protect lives. The use of flame retardants in upholstered furniture is a clear ex
2021 / 09 / 10
PVC is the three-letter acronym used to describe polyvinyl chloride, a synthetic plastic and highly versatile material. PVC is widely used within modern society and sector applications as pipe for transporting fluids from water to chemicals to ingredients. uPVC stands for unplasticized polyvinyl chloride and is PVC without plasticizing (flexibility) agents added. PVC and uPVC is often used to refer to the same product and most standard PVC pipe is actually uPVC pipe. At its basic level, PVC is a repeating macromolecule of individual vinyl chloride (VC) monomer units that have been joined together by chemical reaction to produce the polymer polyvinyl chloride, PVC. To classify the polymer, PVC belongs to the thermoplastic division of plastic materials. As a thermoplastic, this means PVC softens when heated and can become molten for use in production or recycled for reuse. This is similar to olefins such as polyethylene and polypropylene that are also thermoplastics. Also similar to olefins, PVC is derived from the refinery process of natural oil resources that make modern fuels. Ethylene gas and chlorine from rock salt (NaCl) are reacted together to produce vinyl chloride, which is then further refined to produce polyvinyl chloride, also known as PVC.
PVC CHARACTERISTICS AND PROPERTIES
2021 / 09 / 10
PVC as a material is fairly durable, flexible, and resistant to many harsh working conditions that can involve chemicals, soil, water, wastewater and water pressure. As a plastic, PVC is naturally resistant to corroding, rusting and the effects of weathering, excluding PVC`s long term sensitivity to continuous ultraviolet (UV) sun exposure. Within chemical handling and processing, PVC offers sufficient chemical strength and compatibility with many corrosives, strong and weak acids, weak bases and caustics as well as halide / brine solutions.Example of Physical PVC Pipe When compared to many metallic materials that are used for similar applications, products made from PVC are lightweight, more easily maneuvered, can exhibit less chemical reactivity. They also often report lower purchase and installation costs that in turn promotes a greater service life to cost ratio. Plumbing and equipment manufactured from PVC can have a service life potential of 100 years or more when employed within ideal, non-damaging work environments. In terms of working conditions, properties and sensitivity, PVC can be susceptible to elevated temperatures, scenarios that can experience freezing fluids, applications involving pressurized gases and long term outdoor installation with sun exposure. Maximum service temperatures for PVC cap around 140°F (60°C) where softening of the PVC material can begin to occur. Minimum temperatures for PVC are relevant whenever hand
2021 / 09 / 10
Example of PVC Pipe Use First implemented in the 1920s, PVC is now heavily used within water delivery pipes, venting and duckwork for structures, appliances and equipment, plumbing conveyance of sewage and wastes, chemical fluid transfer, in construction engineering as well as an array of individual, unique items and consumer products. When used in applications, PVC is considered non-toxic and relatively inert when manufactured free of specific, potentially harmful additives to the base resin material, such as lead. The most common form of PVC is unplasticized PVC (uPVC) and is the type of PVC used to fabricate rigid materials such as pipes, sheets and structural equipment. The other common PVC type is plasticized PVC where, as the name indicates, has had plasticizing agents added to the resin that increase the material`s flexibility. Plasticized PVC is often used to produce flexible tubing, apparel wear and PVC hoses. Most often whenever the PVC acronym is mentioned, the use of uPVC as the material type is implicated and understood less otherwise stated. Unplasticized PVC is acceptable for ANSI and NSF 61 certification for its use in handling potable, drinkable water. Other common PVC use design certifications include ASTM D1785, D2241, D2729, D3034 and AWWA C900/909. These various design approvals and manufacturing standards for polyvinyl chloride approve the polymer for its use within the many modern application scenarios that PVC is now commonly used within.
2021 / 09 / 10
As one of the most important impact modifiers for PVC, MBS resin can not only toughen PVC, but also keep the transparency of PVC to the maximum extent. At the same time, compared with other impact modifiers, MBS resin can also greatly improve the toughness of products at the same dosage. Therefore, MBS resin is widely used in the processing and application of engineering plastics such as PVC and PBT / PC.
ASA High Rubber Powder introduction
2021 / 09 / 10
This is our self-developed product,it is a ternary graft copolymer which is made up of acrylonitrile (A), styrene (S) and acrylate(A).Due to the introduction of excluding double bond of acrylic ester rubber replaced the butadiene rubber, the weather resistance has a substantial improvement,about 10 times higher than ABS high rubber powder and mechanical properties, process ability, electrical insulation,chemical resistance character is also improved.In addition, ASA resin made from high rubber content ASA has good coloration. Due to its excellent weather fastness, ASA resin can be dyed into various bright colors without fading easily.Products processed with ASA resin do not need surface protection such as spray painting or electroplating, but can be directly used outdoors and exposed to the sun for 9 to 15 months. The impact strength and elongation hardly decrease, and the color hardly changes.
ASA High Rubber Powder Application
2021 / 09 / 10
ASA High Rubber Powder Application 1. Application in architecture and bathroom ASA has excellent oil and chemical resistance, so it can be used to make water tank, drains pipe and pipe fittings, swimming pool pumps and filter shells, hot springs, pool steps and other products. At the same time, ASA has excellent weather resistance and good color stability. It is also used to make signboards, posting boxes, light household wall panels, flowerpots, louver frame and and decorations. 2. Application in automobiles and motorcycles ASA has excellent weather resistance, even after a long time of exposure to the sun and rain,it will not appear gray, and it has excellent chemical resistance and environmental stress cracking resistance, can withstand hot water treatment and detergent cleaning. It is mainly used in the rear reflector, radiator grille, door column decorative plate, window frame, roof vent fence, streamline cover and lamp shell of automobile. ASA is also used more and more in interiors decoration , such as instrument and decorative panels, as well small low-seat and streamlined covers motorcycles. For example, Honda, TVS, Suzuki and other locomotive brands are widely used. 3. Application in electronic and electrical engineering ASA has good weather resistance,because the satellite antenna is placed in the open air, strong winds and changing climate will cause serious erosion to the external parts of the antenna, and unsuitable materials will rust and brittle. The mobile antenna, TV antenna parts,cable connection box and the protective case of satellite electronic device made by ASA solve the problem well. At the same time, because of its excellent chemical resistance, heat resistance, coloring stability, excellent oil resistance and other characteristics, it can be used to make washing machine panel, refrigerator handle, sewing machine, microwave oven and other household dur
2021 / 09 / 04
A smoldering cigarette could turn an apartment without flame retardant protection into an inferno in less than 3 minutes. However, if the chair, bedding, or carpet where the cigarette lay, had flame retardant, the fire might never have started. And if a fire did start, the flame retardants would have reduced the heat and spread of the fire, taking 10-15 minutes to be deadly. Flame retardants provide time: time to leave in safety. It's been proven many times that flame retardants save lives. Here are a couple excerpts from the video below asking "Do Flame Retardants Work?" produced by American Chemistry. "There's plenty of evidence that flame retardants work. There have been numerous studies that have concluded that when you put the right amount of the right type of flame retardant with the right material, they make a massive difference in terms of heat release, which is the principal property of a fire. A study at the National Bureau of Standards comparing products treated with flame retardants, against those that were not treated, found a significant increase in the amount of time for escape and rescue." - Marco Hirshler, President & Technical Director, GBH International "A recent Air France flight that crashed, off the runway in Paris, 353 people aboard. the plane was completely destroyed by fire, but all 353 passengers were able to get off unhurt, because the interior of the plane was heavily flame retarded, which gave them t
2021 / 09 / 04
Three components must be present in order for a fire to occur: oxygen (or an oxidizing agent), heat and fuel. This is often represented by the "fire triangle" or "combustion triangle." The fire tetrahedron represents the addition of a component, the chemical chain reaction, to the three already present in the fire triangle. After the fire ignites, an exothermic chain reaction keeps the fire going until something is introduced into the fire that blocks it. Water is one of the most common choices of fire suppressants. But in some cases, water will not suppress the fire, and may even make it worse. Flame retardant chemicals were developed to block the other elements that were part of the "fire triangle." Flame retardant chemicals may block the oxygen (foams), hydrated flame retardant chemicals release water (aluminum trihydrate and magnesium hydroxide) and halogenated flame retardant chemicals (bromine and chlorine) remove free radicals and create a barrier of inert gas that suppresses the chemical reaction creating the fire. Most items will release flammable gases when they burn, which are a catalyst for the fire. The fire is aided with the oxygen in the air. Some materials, like wood, do not produce gases when they burn. Instead, they produce a "char" as the result of smoldering, and often times can extinguish themselves. Natural charring has been adopted in some flame retardants, allowing them to create a char on the product that is burning. Much like the wood that stops burning from the char, these materials will self-extinguish when the char forms and smothers the fire.
Halogen free flame retardant for glass fibre nylon of original color, light color
2021 / 09 / 04
Novista®PN2131C is equivalent to Exolit OP1312, used for GF nylon6/PA6 Novista®PN4131C is equivalent to Exolit OP1314, used for GF nylon66/PA66 Novista®PN5131 is equivalent to Exolit OP1400, used for 9T nylon, 10T nylon, PPA. Flame-retardant nylon is one of many modified varieties of nylon. It can be used in automobile ignition system components, solar photovoltaic cell components, home appliance plugs and sockets, electrical circuit breakers and so on. The flame retardant rating of nylon before modification is around UL94 V-2. By adding flame retardant to nylon for modification, the flame retardant rating after modification can reach UL94V-0. The processing temperature of nylon is relatively high. For example, the melting temperature of PA6 is 230-280
what do you know about the pvc processing aid?
2021 / 09 / 03
When I first came into contact with this line, I heard that my predecessors often said: Our products are "industrial MSG", the amount of use is small, but the effect can not be underestimated. The performance quality of PVC products is directly related to it. Later, it was found that many times including the industry. People have more or less misunderstanding about the classification and function of ACR. They have carefully combed the understanding of PVC processing aids in these years, hoping to help friends to improve their understanding! From a large category, PVC processing aids ACR can be divided into three broad categories: 1. Promote plasticizing processing aids: This type is widely used in hard PVC products. Its main function is to promote plasticization, improve melt rheological properties and improve the dispersibility of other additives, and improve the apparent quality of products. Applicable to most PVC products such as profiles, pipes, plates (rolls), reference dosage 1-2phr 2. Foaming regulator: PVC foaming regulator can greatly increase the melt strength of PVC material due to its high molecular weight, thus effectively encapsulating the foaming gas to form a uniform honeycomb structure and prevent gas from escaping. PVC foaming regulator is also beneficial to the dispersion of other additives including foaming agents, improving the surface quality of products and improving gloss. Applicable to foamed sheet, foamed rod, foamed tube, foamed profile, foamed wood and plastic, etc., reference dosage 4-8phr 3. External lubrication type processing aid: It has the same good metal stripping property as oxidized polyethylene wax. The difference is that it has good compatibility with PVC, and can also incre
2021 / 09 / 03
In 2021, the domestic PVC production increased significantly, reaching 1.9799 million tons, 1.8643 million tons and 1.9423 million tons respectively from January to March, with a year-on-year growth rate of 9.99%, 25.21% and 10.21% respectively. The reason is that the epidemic situation has been effectively controlled, and the self-produced calcium carbide enterprises in Northwest China are highly profitable and have high enthusiasm to start. In terms of imports, the total imports from January to February were 67300 tons, a year-on-year decrease of 21900 tons, while in terms of exports, the total imports in the current period increased 218300 tons. At present, the export window has been opened, and the domestic PVC export momentum will continue until June. In fact, not only the direct export volume of powder increased, but also the export volume of finished products continued to improve. From January to February, the export volume of PVC paving materials was 459900 tons and 350200 tons respectively, with a year-on-year increase of 126600 tons and 130000 tons respectively, with a year-on-year increase of 37.98% and 59.04%. In fact, in June 2020, the export cycle of PVC products has started, and the export volume of PVC flooring materials has increased by more than 30% on a year-on-year basis. It can be said that the power of PVC rising market from the middle of 2020 comes from the strong overseas demand. First, the residential sector to increase leverage to buy a house led to the demand for PVC products. PVC, as a back-end variety of real estate, the recovery of real estate sales has an obvious direction effect on the demand for PVC. Most foreign orders of Chinese PVC flooring enterprises have been arranged until June, which confirms the boom of overseas demand to a certain extent. On the whole, the short-term price of PVC went down, but there was a strong upward drive in the third and fourth quarters. Whe
Advantages of ACR Impact Modifier Products:
2021 / 09 / 03
As an ideal rigid PVC processing aid, ACR impact modifier has been widely recognized, and can be added to any rigid PVC products according to different processing needs. Application: The average molecular weight of the modified ACR is much higher than that of the common PVC resin. Its main function is to promote the melting of PVC resin, change the rheological properties of the melt and improve the surface quality of products. Application scope: 1: profile 2: pipe 3: pipe fittings 4: plate 5: gusset plate, etc. In the production of PVC products, ACR impact modifier can effectively improve the processing properties of PVC profile formula, promote the plasticization of PVC particles, reduce the processing temperature and melt viscosity, improve the plasticization properties of PVC and also ensure good processing fluidity. At the same time, due to its good compatibility with PVC, Can be more advantageous to adapt to the production of low cost, good physical and mechanical properties of PVC products. At present, it has been widely used in the production of PVC profiles, pipes, pipe fittings, plates and wood-plastic products. Advantages of ACR Impact Modifier Products: 1. The special bimodal molecular structure can rapidly promote the plasticization of PVC in the process of processing and still maintain good processing fluidity; 2, special production process, the product particle size is far less than the traditional ACR additives, in the PVC products in the dry mixture dispersion probability is greater, the distribution is more uniform, so that the production and product performance is more stable; 3. With special production technology and raw materials, the unit cost of the product is more than 20% lower than that of traditional ACR additives, which greatly saves the production cost for customers; 4. Excellent formula design gives excell
2021 / 09 / 02
CPVC resins require compounding with a variety of additives in order to make them processable into parts. These additives can take a number of forms: - Heat stabilizers - to protect the polymer during high-temperature processing - UV stabilizers - to protect the polymer for outdoor applications - Impact modifiers - to improve durability and strength - Processing aids and lubricants - to assist with the formation of prod
2021 / 09 / 02
How PVC, CPVC, and PEX Are Used in the Home? Plumbing pipe is primarily used in three ways in your home, to: Bring water from the local water utility to your house through water service lines. Deliver hot and cold drinking water to your faucets, showers, toilets and appliances through water distribution systems inside your home. Collect and remove water, sewer gases and waste from toilets, showers, sinks and appliances through drain-waste-vent (DWV) systems. Based on these three functions, PVC, CPVC and PEX may work for some applications, but not others. While PVC is excellent for water service lines and DWV applications, it`s not recommended for hot-water distribution systems because it can only withstand temperatures up to 140℉. CPVC and PEX, however, can withstand temperatures up to 200℉. Most water heaters are set to heat water to no more than 140℉. Average Lifespan PVC, CPVC and PEX have been in use in residential plumbing applications for decades. Historical information, as well as independent research studies, indicate that PVC, CPVC and PEX can have a 50+ year life when installed correctly under the proper conditions. Are CPVC, PVC & PEX Safe for Drinking Water? All plastics used in potable water systems must be tested regularly and certified by a third-party certifier as meeting the strict public health requirements of NSF/ANSI/CAN 61. NSF International is an independent, accredited organization that develops public health standards and certification programs to help protect the world`s food, water, consumer products and environment. This testing ensures that drinking water carried by plastic pipe meets the strictest health effects standards. You can look for the NSF (or other third party) certification to rest assured that y
2021 / 09 / 02
In 1960, CPVC (Chlorinated Polyvinyl Chloride) was developed as a tough, reliable plumbing material. Today, millions of homes and businesses around the world trust our products to deliver clean, safe drinking water. Chlorinated Polyvinyl chloride (CPVC) is a specially engineered thermoplastic polymer widely used for the transportation of potable Hot & Cold water in plumbing applications, water in fire sprinklers piping, and chemicals in industrial applications. CPVC is a modified version of PVC. PVC is a higher polar polymer that allows working with a wide range of additives that permit a broad range of physical property characteristics. This allows many different compositions of PVC compounds and allows a great diversity of applications from rigid PVC used in pipes to flexible PVC used in packaging etc. As CPVC is a modified version of PVC, it has a higher level of chlorine than PVC. CPVC becomes an even higher polar polymer, and this polarity permits the use of a wide range of additives that can be incorporated into it. However, due to the higher chlorine content, the use of additives becomes very selective and hence needs more precision.
Flame retardant (HFFR) in glass fiber reinforced PA6
2021 / 08 / 28
PA6 glass fiber reinforced composite material uses glass fiber as a filler, which does not improve the flame resistance of the composite material because of the high flame retardant properties of glass fiber. Easier to burn. The wick effect of PA6 glass fiber reinforced material The so-called "candle wick" effect means that the candle needs a wick to burn. It originated from the research and explanation of the "spontaneous combustion" of the human body in academia. The PA6 material contains amide bonds, which is flammable. When ignited, it melts into droplets and then ignites. The flame is yellow and emits a paste smell similar to that of wool and nails. After the PA6 glass fiber reinforced material is ignited, the resin matrix is first melted, and the filled glass fiber is like the wick of a candlestick. The nearby melted PA6 melt is transported to the flame with the highest temperature to be gasified, which accelerates the cycle of combustion. Therefore, the flame retardancy of PA6 glass fiber reinforced materials is worse than that of pure PA6, especially PA6 reinforced with long glass fibers is more flammable. Traditional flame retardants, such as brominated polystyrene and brominated epoxy resins, can be used for flame retardant treatment of glass fiber reinforced PA6, but the application of such flame retardants is increasingly restricted due to the toxicity of halogen after combustion. , New halogen-free flame retardants, melamine cyanurate, melamine polyphosphate, organic hypophosphite,
2021 / 08 / 28
As the name suggests, flame retardants are used to prevent materials from being ignited and to inhibit the spread of fire. They are mainly designed for flame retardant polymer materials. Generally speaking, flame retardants mainly play the role of heat absorption, covering, chain inhibition and asphyxiation of non-combustible gases to achieve flame retardant effects. The material processed with flame retardant can effectively prevent and delay the spread of flame when it is attacked by external fire sources. Flame retardants are divided into two categories: organic flame retardants and inorganic flame retardants. Among them, organic flame retardants include organic phosphorus flame retardants and organic halogen flame retardants, and representative products of organic halogen flame retardants It is an organic bromine flame retardant; inorganic flame retardants are mainly various metal oxides. The classification of flame retardant products is shown in the figure below: Flame retardant classification The three major categories of organic halogen, organic phosphorus and inorganic flame retardants have great differences in performance, flame retardant efficiency and environmental protection, and their application fields are also different. The specific differences of the three types of flame retardants are shown in the following table: Various flame retardant properties Compared with organic halogen flame retardants, organophosphorus flame retardants are characterized by low toxicity, less smoke, low cor
Flame Retardants: Preventing Fires and Protecting Consumers
2021 / 08 / 28
As consumer products continue to evolve and improve, from lighter and faster computers to energy-saving building materials and construction methods to more fuel-efficient cars, fire safety technology allows these products to comply with domestic safety standards and laws. Flame retardants are materials that can be used in products, made from plastics, textiles, foams or wood, to reduce the chances of a fire starting and to delay the spread of fire once it starts. Flame retardant compounds help mitigate fire danger - Increase plastic`s ignition resistance - Reduce the speed of flame spread - Reduce heat release - Reduce smoke & fume generation Novista Group produce flame retardant APP (ammonium polyphosphate), MCA (melamine cyanurate)and DBDPE (Decabromodiphenyl Ethane), good quality and favorable price. REACH and RoHS certificated. Novista Group supplies DBDPE, BDDP, FR245, SR130 to global market.
HOW FUSION IS PROMOTED BY PROCESS AIDS DURING PVC PROCESSING?
2021 / 08 / 27
Introduction: Process aids (PA) are unique additives that dramatically improve the processability of PVC, at relatively lower concentration. Besides, they are used to achieve processing improvements, higher productivity, and better product quality. Nature of process aids: Process aids are random copolymers, whose major component is methyl methacrylate. Other component may be styrene or acrylonitrile. They are PVC compatible. Process aids are produced by emulsion polymerization. Processing aids have two categories – 1. That promotes fusion and adds rubber elasticity during processing, and 2. That adds lubricity during processing. Processing Aids that promotes fusion – They are acrylic polymer, high molecular weight MMA copolymers (MMA / styrene) or Acrylonitrile styrene. Modified rheology (Viscosity & Elasticity) and morphology (how primary particles arrange – fuse together) of PVC compound during processing is a function of molecular weight of process aid. No alt text provided for this image Selection of molecular weight of process aids depend upon the process: Lower the molecular weight of process aids and softening temperature, greater is the effect on fusion. They are used in rigid extrusion. Medium molecular weight processing aids are used for calendaring process. Medium – high molecular weight processing aids are used in injection moulding as well as thermoformed products. High molecular weight process aids are used in
What Are The Functions Of PVC Processing Aids?
2021 / 08 / 27
PVC processing aids as the name suggests, it is a help PVC processing products, its use can make our processing better. Now let's have a look its functions. Due to the poor ductility of PVC melt, it is easy to cause the melt to break, and the PVC melt to relax, which easily leads to the defects of rough and dull surface. Therefore, in order to improve the melt defects, PVC processing aids are often added in PVC processing. There are three main action modes of processing aids: promoting resin melting, improving melt rheological properties and giving lubricating properties. It plays a lot of roles in our processing. Our processing is inseparable from it, but we still need to choose good products and use them correctly.
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