What role will ACR processing aids play in PVC?

What role will ACR processing aids play in PVC? ACR processing aids can promote the plasticization mechanism. Only materials with uniform and good plasticization can produce PVC products with good appearance and mechanical properties. Because PVC processing aids The agent has the following characteristics, and the ACR processing aid can make PVC have the function of promoting plasticization.

The characteristics of ACR processing aids are:

1. The melting temperature is lower than that of PVC, and the ACR processing aid melts before PVC during processing.

2. Because of its good compatibility with PVC, it can stick PVC particles after melting during processing, increase internal friction, increase shear torque, generate internal heat, make the temperature distribution in the material uniform, and the degree of plasticization is uniform, thereby Promote the uniform plasticization of PVC materials.

3. The processing aid has a sufficiently large molecular weight, which increases the viscosity (or strength) of the melt during processing, increases the pressure of the melt, and prevents the slippage of the material, thereby increasing the shear torque and making the melt and the metal The frictional heat on the surface is greatly increased, which promotes the mixing uniformity and plasticization degree of the PVC compound.

 Nowadays, plastic products are popular, and plastic materials are constantly being developed and applied. There is also a great demand for plastic processing aids. The development of science and technology has promoted the progress of the industry. ACR series processing aids are commonly used processing aids, which have good thermal stability and aging resistance, improve the properties of substances, and improve practicability.

ACR processing aid is prepared by graft polymerization of methyl methacrylate to alkyl acrylate elastomer, and has a "core-shell" structure. Its "core" is a type of low-crosslinked acrylic rubber polymer, and the "shell" is a methyl methacrylate graft polymer with good compatibility with PVC. It is widely used in PVC products in China. The main purpose of processing ACR is to improve the processing performance of PVC. It is usually produced by graft copolymerization of methyl methacrylate, methacrylates and acrylates. PVC type, but the heat and shear force transmission of PVC resin itself is not strong, and the melt formed is not uniform. After ACR modifier, it can obviously improve the characteristics of PVC and product surface gloss.

 The performance of plastic products is closely related to processing aids. The development of high technology has greatly helped plastic materials, improving their performance and becoming a more widely used material. Among them, plastic processing aids have been promoted, and there are more and more types, which are more and more convenient for the improvement of material properties.