Polyvinyl WSD processing aid is one of five common plastic

Polyvinyl chloride (PVC) is one of five general-purpose plastics , its products have a wide range of uses. However , PVC thermal stability exists disadvantages must be added when a suitable heat processing stabilizer to inhibit thermal degradation. Heat stabilizers Metallic stearate commonly used in industry are mainly inorganic lead salts and organic tin, metallic soaps . However , one of the most common varieties are poisonous , which not only limits the scope of application of PVC products and harm to the environment and their use of labor health PVC products are produced with sustainable growth and rapid deepening. To protect the environment , improve the working conditions of health in recent years in Europe , America, Japan, and the country has been developed and implemented to limit the use of hazardous chemicals policies and regulations. Therefore , research and development at home and abroad are set off and promote the use of non-toxic substance heat stabilizers to replace traditional toxic varieties boom. Rare is the advantage of PVC plasticizer our resources , rare earth compounds as PVC heat stabilizer application has attracted wide attention . In principle , since the rare earth hydroxide with a weakly alkaline medium and can absorb HCl, and hence, a heat stabilizing effect PVC . But until now , although the literature involving alkaline earth metal hydroxide is calcium hydroxide as a particular application of PVC heat stabilizers , but no rare earth hydroxide is used as PVC heat stabilizers research reports . Recently , the experts for the development of cost-effective environmentally friendly zinc-based PVC heat stabilizers, inorganic compounds as application performance heat stabilizer for a more systematic study found that lanthanum hydroxide is an effective synergist heat stabilizers.

WSD plastic processing aid industry is currently technical level

According PvC plastics processing industry is currently technical level , although a variety of products , recipes using different households but still mixed metal stabilizer system based. In the past, products processing factories with one-component , single-species steady purchase Beng various additives, formulated his own mixed use , PVC stabilizer processing a variety of PVC products, now has developed into the stabilizer born less "factory according to user requirements , composite production, and can be . ne-paeks ( one package ) sold stabilizer products, deepen and broaden the technical support services , so varieties of PVC compound stabilizer designed for user needs , and many more special type of master such as liquid composite stabilizer , mainly for soft products ( films, leather , etc. ) : clean composite solid lead salt stabilizer , mainly used for rigid materials such as articles and cable : for a single machine and specialized product requirements design composite stabilizer ( such as ZFZ products dedicated to the sole material ) .Compatibility with the ratio of the composite stabilizer , based on long production experience , is still a variety of metal salts as Lord stabilizer, with its complex and adduct of synergy effect . Should , while accompanied by a variety of auxiliary stable agents, to further enhance the stabilizing effect of the metal PVC heat stabilizer salt system. In the design of the liquid component of a composite stabilizer , metal salts of the general control of the content of 2% -15 % ( of metal ion , the weight percentages ) phosphite, vinegar, 10% -50 % , 2% -10 % of antioxidant , light stabilizer 1% to 4% lubricant 1% -10 % 20% -40 % solvent . The solid composite stabilizer , generally available Pvc resin together with modified and processed cPE, EvA etc. ) as a carrier excipient , the control content of 10% -50 % metal salt ( metal ion count , percent by weight) , a lubricant 5% -15 % auxiliary stabilizer 5% -10 % .

Ideal for PVC heat WSD plastic processing aidstabilizers should be a versatile substance

Ideal for PVC heat stabilizers should be a versatile substance , or a mixture of some of the material, they are able to perform the following functions : First, replacement lively, unstable substituents ; second is to absorb and neutralize the release of PVC processing HCL, eliminating plastic additive autocatalytic degradation of HCL ; Third neutralize or inactivate catalytic degradation of metal ions and other harmful impurities ; Fourth, through various forms of chemical reactions can be blocked unsaturated bond continues to grow , inhibiting degradation coloring ; five is the best shield against ultraviolet protective effect . Generally, heat stabilizers according to their performance with the use of special , very little is used alone , but most of the species in a powder form , some of which are highly toxic chemicals. For ease of use , to prevent dust poisoning, reduce toxic substances or substitute non-toxic substances, at home and abroad in recent years developed a wide variety PVC plasticizerof composite stabilizer , for example , the world famous German brand composite stabilizer Bear series , the United States , Germany, Japan , Netherlands and other countries , or organotin compound organotin stabilizers have a considerable market in China . Therefore , the development of China's efforts to promote the use of high efficiency, low cost , no dust pollution and toxic or low toxicity of new composite stabilizer is an urgent need for the development of China's plastics industry .

the mutual solubility of the mixed resin and plastic processing aid in

 Auxiliary plasticizer; inserted only partially crystalline molecular plasticizer amorphous regions of the polymer, the plasticizer, the plasticizer is also called non-solvent. Compatibility: the ability to dissolve the plasticizer and resin mixed with each other, and is one of the most basic requirements of plasticizer. Cohesive energy density (CED): energy per unit volume of solvent evaporation. Solubility parameters: the square root of the value of the energy of vaporization per unit volume of solvent. Cloud point (Tc): dilute homogeneous polymer solution and a plasticizer, at a temperature becomes cloudy during cooling. By measuring the cloud point can be estimated plasticizer and resin compatibility. The lower the cloud point, a plasticizer compatible with the polymer, the better. Plasticizing efficiency; plasticizing efficiency of the resin reaches a certain degree of softness is called the amount of plasticizer plasticizer. Plasticizing efficiency is a relative value, the plasticizer can be used to compare the plasticizing effect. The method used for representing plasticizing efficiency glass transition temperature (Tg) and reduce the decrease in modulus is represented. Oxidation of the polymer is the time increases with the decrease of the performance of the polymer, also known as auto-oxidation. Into the induction period, a strong oxidizing period. Antioxidants; refers to polymers by oxidation and slow the aging phenomenon can play the role of a class of chemicals. Primary antioxidant; antioxidant is considered to be the main cleaning agent, a free radical, it is through the coupling reaction (i.e., the termination reaction) to give a hydrogen atom or to prevent the damaging effects of free radicals in the polymer. Secondary antioxidants; role of antioxidants is to help decompose the peroxide oxidation of the resulting polymer. Antioxidants including an aid phosphite 2, 3 thioether antioxidants, metal deactivators metal ion deactivators; preventing the heavy metal ion induced oxidation of the resulting polymer material, often referred to as metal ions blunt agent or a metal deactivator, a metal chelating agent, also known as copper inhibitors. Stabilizer: to prevent or retard the polymer during processing, storage and use of chemical aging deterioration. Thermal stabilizers; mainly for PVC and other chlorine-containing polymers, which will not affect the processing and application, but also a certain degree of thermal decomposition of delaying the action of a class of additives. Light stabilizers; Where can inhibit or slow down the aging of optical oxygen substance called ultraviolet light stabilizer or stabilizers. Radical scavengers: a class of piperidine derivatives light stabilizer with steric effects, referred to as hindered amine WSD zinc stearate  light stabilizer (HALS) - aging or photoaging: molecular material long-term or short-term exposure to the sun set under strong fluorescence, due to absorption of UV energy, causing auto-oxidation reaction, leading to degradation of the polymer, making the products discoloration, brittleness, performance degradation, which can not be reused. This process is called oxidative aging or photoaging light flame retardants; able to increase the flame resistance of the material substance called flame retardants. They are mostly first periodic table V, compound VII and combustion speed of the group III element: refers to the length of the sample per unit time of combustion. Synergistic effect: refers to two or more with the use of additives, the total effect is greater than the sum of the individual effects when used alone. Synergy system: complex flame retardant with the use of the interaction between the flame-retardant to improve performance, the system is called a synergistic effect. Synergistic systems commonly antimony - halogen system, phosphorus halide system, phosphorus - nitrogen system. Burning speed: denotes the length of the sample per unit time of WSD Aluminum hydroxide  combustion. Burning speed is horizontal and vertical burning combustion method to measure too. Oxygen index: refers to the sample continued to burn like a candle shape, nitrogen - oxygen mixed gas stream must minimum oxygen content. External friction: polymer materials during the molding process, the polymer melt friction between the surface and processing equipment. Friction: polymer material during the molding process, the molten polymer molecules exist between friction. Lubricants; polymer to reduce friction and external friction, improved melt flow plastics, polymer material during processing to prevent the sticking of the device to ensure the surface smoothness of the added substance called lubricant. Lubricants: prior to processing the plastic ingredients, add a certain compatibility with the polymer lubricant and uniformly dispersed into the material, can reduce the friction between the resin molecules sky lubrication. External lubrication in two ways: one is in the polymer material forming the lubricant coated on the surface processing apparatus, allowed to melt at processing temperatures, and the metal surface of a "thin layer" is formed, the plastic melt and processing equipment to isolate, without adhering to the equipment, or ease of stripping off the roll; Another is compatible with the polymer is very small, it is easy to migrate from inside the polymer during processing On the surface, thereby forming WSD Calcium stearate  a spacer layer material, before the processing of the ingredients added to the plastic dispersion, and migration to the surface during processing, providing lubrication. Mold release agent: Mold and machining the workpiece remain completely chemically inert substance called a release agent. Blowing agents; make a class of blowing agents are liquid or plastic state within a certain viscosity range of rubber, plastic material forming the microporous structure.

Field of PVC processing aid applications overview of some of the development

Plasticizer addition, other competitors to enter the market to make additives become more enthusiastic. " Plasticizer market WSD one pack stabilizer  is very active in recent years ." Renewable energy technologies have significant market interest , as an alternative to traditional petroleum-based plasticizer raw materials. Benzoate, phthalate plasticizers. Reportedly showed that a plasticizer having a low viscosity compared to traditional , conventional defects can be eliminated to improve the  WSD PVC plasticizer efficiency of the production process and also as a heat stabilizer and a stabilizer formulation to reduce demand .
Other PVC additives company also announced this year , and some claim that " green" ( or at least the plant ) . By chemical modification of soybean oil -based wax. The company claims that when the injection molding, its performance is superior to the fatty acid -based lubricant , stronger liquidity and dimensional stability. When used in the manufacture of rigid PVC is particularly suitable , especially cadmium or WSD Polyethylene wax  zinc extrusion steady stable PVC or tin.
Earlier this year, for the production of calendered or extruded sheet and profiles . Especially those who need to print , composite , or a combination . Pick some plant materials ( non-animal ) as is said to provide the same optical performance and handling characteristics as a standard lubricant .

plastic processing aid to promote the rapid development of other products

Reportedly showed that a plasticizer having a low viscosity compared to

traditional, conventional defects can be eliminated to improve the

efficiency of the production process and also WSD Chrolinated polyethylene  as a heat stabilizer and a

stabilizer formulation to reduce demand.
Other PVC additives company also announced this year, and some claim that

"green" (or at least the plant). By chemical modification of soybean oil-

based wax. The company claims that when the injection molding, its

performance is superior to the fatty acid-based lubricant, stronger

liquidity and dimensional stability. When used in the manufacture of rigid

PVC is particularly suitable, especially cadmium or zinc extrusion steady

stable PVC or tin.
Nevertheless, the additive has been selected several plants are relatively

common, although sometimes people living in common plants, such as

rapeseed, it is not a household name. High erucic acid rapeseed oil as raw

material, from growers in northern Europe. As  WSD PVC plasticizer a lubricant additive or

discharge, slip, or for the polyvinyl chloride, polyolefins and other

polymers, anti-blocking agent.
Today, the majority of the additive may be regarded as new tools to create

new products and performance, rather than heat and light in order to

accelerate the process or to keep the polymer. Like a toolbox, which is

rich tools also make it with the diversity of the capabilities to produce

extraordinary role and significance in the use of different combinations.
Green bioplastics widely respected in recent years, major companies are

actively developing new green materials. By changing the development of

novel plastic additive dispersed in the molecular structure, improve or

reduce the cost of the chemical nature of the  WSD chromium oxide substance. The additives to

improve the processability of PVC material, physical, chemical and other

functions, the substrate to increase the physical and chemical properties.

It is because of these companies continue to actively innovation, the PVC

industry to breathe new life.

PVC processing aid and the use of its characteristics

ACR acrylic esters (Acrylics) Abbreviation is generic acrylic ester series modifier , based acrylic ester polymer of copolymer . ACR is a copolymer of methyl methacrylate and acrylic acid ester as  WSD Calcium stearate a white flowable powder. Depending on acrylic esters , ACR different properties and uses the proceeds of its wide range of applications. ACR as processing aids , plasticizers can significantly shorten the time to accelerate melting and promote plasticized , extruded products can make to improve the balance of torque , making it even plastics ; pair of rolled products , adding ACR to overcome the surface wrinkles , help roll  WSD Plastic impact modifier package of materials , reducing air bubbles ; for vacuum forming products , adding ACR to improve melt extensibility overcome melt fracture phenomenon , easily deep drawing , and make uniform product thickness . From the looks of the article , ACR can significantly improve the surface gloss of products, to make products look smooth and delicate. The processing aids wide range of applications , in addition to rigid PVC products, the semi- rigid and soft PVC products, PVC products all have the effect of improving  WSD stearic acid processing performance for applications that require good weather resistance of opaque PVC products such as pipes, construction material ( siding, doors and windows profiles, pipe fittings , blinds, rain gutters , etc. ) as well as injection molding, blow molding products.