Adhesion and Softening Point of Chlorinated polypropylene CPP with Varying Chlorine Content

The chlorine content has a key impact on the performance of chlorinated polypropylene CPP.

Adhesion and Chlorine Content

In terms of adhesion, low-chlorinated chlorinated polypropylene CPP (26%-28%) and benzene-soluble CPP (28%-35%) show stronger adhesion to PP films and paper, making them suitable for ink primers.

Ester-soluble chlorinated polypropylene CPP (36%-40%) has an advantage in compatibility with other resins, making it suitable for inks with complex formulations.

Softening Point and Chlorine Content

Regarding the softening point, according to the "chlorine content vs. softening point diagram," higher chlorine content generally corresponds to a lower softening point—for example, CPP with a chlorine content of 22% has a softening point of approximately 100℃, while ester-soluble CPP with a chlorine content of 41% has a softening point of approximately 70℃.

How to choose the right chlorinated polypropylene?

 If your customers pay more attention to heat resistance, we recommend choosing low-chlorine or medium-chlorine products;

if better film-forming properties are required, high-chlorine ester-soluble products are more suitable.

If you are still unsure, you can click Contact iSuoChem to request a free sample, and a professional engineer will reply to you via email.