PVC pipe processing aid

PVC pipe processing aid Specification

Shape
Granules

Storage
Room Temperature

Properties
Promotes plasticization Increases melt strength Eliminates sharkskin and melt fracture Improves filler dispersion Facilitates demolding

Physical Form
Powder

Shelf Life
2 Years

HS Code
3906909090

About PVC pipe processing aid

Core Functions (for PVC Pipes):

Promoting Plasticization: Plasticization is the process by which PVC resin particles melt and homogenize under heat and shear. Processing aids significantly accelerate plasticization, lower processing temperatures, and make the material more uniform, thereby improving the mechanical strength and dimensional stability of the pipe.

Increasing Melt Strength: PVC melt has low viscosity and is prone to cracking. Processing aids increase the viscoelasticity and strength of the melt, preventing sagging, tearing, or surface roughness during extrusion (especially upon exiting the die), ensuring stable pipe shape and smooth inner and outer walls.

Eliminating Shark Skin and Melt Fracture: At high extrusion speeds, rough and irregular defects easily appear on the pipe surface. Processing aids effectively improve this situation, allowing for higher production speeds.

Improving Filler Dispersion: Helps fillers such as calcium carbonate disperse more evenly in the PVC matrix, improving the consistency of pipe performance.

Easy Demolding: Some processing aids have a certain external lubricating effect, facilitating smooth demolding of the pipe.

Main Types (Chemical Composition): PVC processing aids used for pipes are mainly high molecular weight acrylate copolymers, commonly including:

PMMA series: Polymethyl methacrylate (PMMA) copolymers, the most common, with good overall performance.

ACR series: Acrylate copolymers, the mainstream processing aids, which promote plasticization and improve melt strength.

AMS series: Oligomers of -methylstyrene, lower in price, but with slightly inferior performance to ACR.

For PVC pipes, ACR-type processing aids are the most common choice due to their superior performance.

Tell us about your requirement