A compound is defined as a substance formed when two or more elements are chemically bonded together. PVC Compound is the English name for PVC modified material.

We have previously introduced the difference between PVC rigid and flexible compounds.The difference between rigid and flexible PVC compounds, in a word is – plasticizer.

The following are some of the additives commonly used in vinyl compounds formulations.

1.PLASTICIZERS——promotes flexibility and inhibits brittleness

Plasticizers, which are typically liquid chemical compounds, are added to PVC resin to make it flexible. The more plasticizer added to a compound, the softer and more flexible the PVC becomes. All flexible vinyl compounds contain plasticizers or alloys in order to make them less rigid and easier to process.

2.STABILIZERS——to maintain it in a stable or unchanging

Stabilizers are essential in PVC compounds because PVC resin can degrade when exposed to elevated temperatures. Heat stabilizers help to diminish breakdown and enhance heat stability. UV stabilizers are used in compounds that may encounter direct, extended contact with sunlight.

3.LUBRICANTS——minimizing friction

Lubricants are added to compounds to assist in the manufacturing process. They help with melt viscosity, compound flow, and to minimize both processing and molecular friction.

4.FILLERS——increase volume, opacity, or strength

Fillers are solid materials of varying particle sizes used in the formulation of PVC compounds to improve impact performance, opacity and to add stiffness and tensile strength. Particle size and ratio of filler to resin are considerations when determining how much filler can be used without degrading the performance of a compound.

5.FUNCTIONAL ADDITIVES——typically to improve an aspect of performance

Several other types of additives may be introduced to a compound to enhance or create a unique property within the compound.

6.ALLOYING POLYMERS

A polymer blend or mixture in which polymer(s) blend toegether with PVC to create a new material with different physical properties than PVC alone

Blends are created when PVC compound is blended with another polymer to achieve enhanced performance. Many times these blended compounds are used in harsh environments or when abrasion and chemical resistance is required.

 (Disclaimer: All the tutorials and resources included in this site are from the Internet, and the copyrights are owned by the original author and its website. Although this site strives to preserve the original copyright information, it may not be able to determine its origin due to various reasons. The true source, please forgive the original author! If you have any objection to the attribution of the tutorial and resources of this site, please notify us immediately, the situation is true, we will delete it in the first time.)