PVC foam board foaming regulator

PVC foam board foaming regulator Specification

Properties
The foaming regulator used for PVC foam board is the "guardian of foam pores", which endows the melt with sufficient strength and elasticity through ultra-high molecular weight structure, achieving the core goals of "small bubbles, uniform bubbles, strong skin, and stable shape". Choosing models that are suitable for thickness and process, combined with reasonable formulas and process parameters, can significantly improve the quality and production efficiency of foam boards.

Poisonous
NO

Shelf Life
2 Years

Application
Industrial

Usage
4 8 phr

Product Type
General chemical

Physical Form
Powder

HS Code
390690

Smell
Other

Taste
Other

Shape
other

Appearance
Powder

Storage
Room Temperature

About PVC foam board foaming regulator

Foam regulator for PVC foam board is a type of ultra-high molecular weight acrylic copolymer (ACR) core processing aid designed specifically for the extrusion process of rigid PVC foam. By accurately controlling the rheological properties of the melt, it solves the problems of cell rupture, co foaming, collapse, and surface defects caused by short PVC molecular chains and low melt strength. It is a key additive for obtaining uniform cell structure and stable surface quality.

The core contradiction of foaming is the match between "bubble expansion" and "melt strength". This regulator achieves stable foaming through three main functions:

Improving melt strength and elasticity: Ultra high molecular weight long chains are wrapped around PVC molecular chains to form a mesh structure, enhancing the cohesion of the melt, effectively encapsulating foaming gas, preventing bubble coalescence, rupture, or escape, and forming uniform honeycomb like bubbles.

Regulation of plasticization and gel: Promote the uniform plasticization of PVC resin, fully dissolve and evenly nucleate the gas decomposed by foaming agent, balance the plasticization speed and foaming time, and avoid early foaming or insufficient plasticization.

Optimize surface and processability: improve melt flowability and ductility, reduce surface cracking caused by extrusion traction, and enhance skin smoothness and glossiness; Simultaneously optimize the dispersion of additives to reduce defects such as "shark skin" and "fish eyes".

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