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 % .

PAFC first three outs coagulation process

PAFC is aluminum ( aluminum sulfate ) and iron coagulation hydrolysis , and set them on the merits of a new and efficient coagulant It is also the wastewater treatment coagulant. Well, you know ferric chloride coagulation in the first three kind of how it is played . We dibasic lead stearate  take a look at three stages of the coagulation process and the formation of hydraulic conditions alum status .
Condensed phases: the liquid is injected into the raw water coagulation tank with rapid coagulation in a very short period of time the process of forming a fine alum , when the water becomes more turbid , it requires water to produce intense turbulence . Beaker experiment should be fast ( 250-300 rev / min ) was stirred for 10-30S, generally no more than 2min.
Flocculation stages: yes alum  n-butyl stearate grow thicker process, requiring an appropriate degree of turbulence and sufficient residence time (10-15min), to the later observed sinking slowly gathered a large number of alum to form a clear surface layer . Beaker experiment first with 150 rev / min stirring for about 6 minutes, then 60 cycles / minute to about 4 minutes was stirred in suspension .
Settlement stage : it is carried out in the settlement pool floc settlement process , requiring slow water flow , to improve the general efficiency of the use of ramps ( plate ) settling pond , lots of thick alum perianth inclined tube ( plate ) and deposited in the  glyceryl monostearate pool wall barrier end of the upper water to clarify the water , the rest of the small particle size, density alum side down slowly , while continuing to collide knot large cloud -to-late I basically unchanged . Beaker experiments should be 20-30 rev / min slow stirring for 5 minutes, then 10 minutes of static sink , than measured turbidity . PAFC take aluminum ( such as aluminum sulfate , etc. ) , iron coagulant their respective flotation operation advantageous to improve the PAC coagulation performance ; the high turbidity water and low temperature and low turbidity water purification effect is particularly evident not add alkaline additives or other coagulant .

PVC lubricants Overview

PVC lubricants can be divided into two kinds of external lubricant and lubricant inside and outside lubricant is mainly to improve the polymer melt processing equipment with hot metal surfaces rubbing. It is compatible with the polymer is poor, easy to migrate from the melt inside out, they are able to melt the plastic and metal

The formation of a thin layer of lubricating the interface. Lubricants and polymers have good compatibility, which serve to reduce the polymer inside the role of cohesion between the polymer molecules, thereby improving the internal friction of the plastic melt heat and melt fluidity. Commonly used plastic lubricant are stearic outer

Acid and its salts; internal lubricant is a low molecular weight polymer. Some other function of the lubricant. Each lubricant has actually can achieve a desired effect, always together internal and external lubrication, except in one respect more prominent. Run the same kind of

Slip agent in the different polymers or different processing conditions will exhibit different lubrication, such as high temperature, high pressure, the internal lubricant is squeezed out and become external lubricant.
In plastic film production, we will encounter some of the adhesion phenomena, such as in the production of plastic film, is not easy to separate the two films, which gives high-speed automatic packing difficult. To overcome it, the resin can be increased by adding a small amount of surface lubricity additives, to increase

Plus external lubrication, generally referred to as anti-blocking agents or slip agents. General molecular structure of the lubricant, there will be long chain non-polar group and a polar group in two parts, they are in different compatibility of the polymer is not the same, thus showing different for internal and external lubrication

Purposes. According to chemical composition, commonly used lubricant can be divided into the following categories: fatty acids and their esters, fatty acid amides, metal soaps, hydrocarbons, silicone compounds and the like.
Lubricant actual processing plastics with a variety of effects, such as the kneading, rolling processing, to prevent adhesion polymer cartridge, inhibition of friction and heat, reduce kneading torque and loads, thus preventing polymer material thermal degradation. In the extrusion molding, can be improved

Mobility, the barrel and the polymeric material to improve adhesion of the mold, to prevent and reduce the retentate. Another film can improve the appearance and gloss

Lubricant lubrication mechanism

General molecular structure of the lubricant, there will be long chain non-polar group and a polar group in two parts, they are in different compatibility of the polymer is not the same, thus showing different internal and external lubricating effect .
External lubricant's role is mainly to improve the polymer melt processing equipment with hot metal surfaces rubbing. Poor compatibility with the polymer which is easy to migrate out from the melt, so that the plastic melt in the interface with the metal to form a thin layer of lubricant.
Lubricants and polymers have good compatibility, which serve to reduce the polymer inside the role of cohesion between the polymer molecules, thereby improving the internal friction of the plastic melt heat and melt fluidity.
External plastic lubricant can be increased in the processing of the plastic surface lubricity, reduce plastic branches and adhesion of the metal surface to be subjected to mechanical shearing force to a minimum, so as to not damage the plastic properties in the case of the easy molding purposes. PVC lubricant can be

Reduce internal friction polymer to increase the melting rate and melt the plastic deformation, reduce melt viscosity and change plasticizing properties. Each lubricant can actually achieve a demand has the role of the joint action of external lubrication is always only one aspect in more projecting

Some. A lubricant in the same or different polymers under different conditions will exhibit a different lubrication, such as high temperature, high pressure, the internal lubricant is squeezed out and become external lubricant. Generally accepted that good compatibility with the polymer, polar polar groups

The lubricant more for large internal lubricant; the contrary, as external lubricant, but there are also internal lubricant and external lubricant properties are excellent varieties.

Lubricants used in plastics

Plastic light PVC lubricant Application:
In adding a small amount of plastic blown film of this product, can accelerate the rate blown, the opening performance improvement film, surface smoothness and smooth feel greatly improved degree, the coefficient of friction between the film surface was significantly reduced; for injection molding, extrusion, drawing, and other production, can speed up the squeeze

Plastic, injection rate, increase the product's surface brightness, lubricity, external mold release properties and dispersion properties; for pumping tablets, pellets pull grains major increase the brightness, resistance to viscosity, foam stability, thermal stability, After forming pellets smooth surface smoothness, color

Bright, no precipitation, better compatibility with the resin, with good fluidity and good surface activity. Plastic brightener in Plastics Processing, is an excellent external plastic lubricant , brightener, and low viscosity, high softening point, in many polymer processing modification,

Melt, extrusion, calendering, blow molding, in particular, high filler PVC resin graft, PE is compatible with the starch and the like, graft copolymerization, in concentrated masterbatch processing, is an excellent carrier of the pigment dispersion.