Difference Between UPVC and CPVC | UPVC vs CPVC

Key Difference – UPVC vs CPVC

PVC or polyvinylchloride is a synthetic thermoplastic often made by the suspension or emulsion polymerization of acetylene and anhydrous hydrochloride acid. It is one of the oldest and most common plastics. During its production process, various chemicals such as impact modifiers, plasticizers, fillers, reinforcing agents, lubricants, and stabilizers can be added in order to widen the uses of PVC. PVC may be available in the forms of flexible thin films, rigid plastics, foams or elastomers. Depending on the addition of certain ingredients, different types of PVCs are formed; namely, PPVC (plasticized PVC), PVCA (polyvinyl chloride acetate), UPVC and CPVC. In this article, the difference between UPVC and CPVC is highlighted. UPVC stands for unplasticized PVC, whereas CPVC stands for post-chlorinated PVC. The key difference between UPVC and CPVC is that UPVC is produced without the addition of plasticizers, whereas CPVC is produced by post-chlorination of PVC to enhance the chlorine content in the polymer.


1. Overview and Key Difference
2. What is UPVC
3. What is CPVC
4. Side by Side Comparison – UPVC vs CPVC in Tabular Form
5. Summary

What is UPVC?

UPVC is the PVC type contains no plasticizers. UPVC can be manufactured by calendaring, extrusion, and injection moulding. UPVC is well known for its low water absorption. In addition, it offers good resistance to alkalis, oils, acids and inorganic chemicals. However, it is not compatible with ketones, chlorinated and aromatic hydrocarbons, aromatic ethers, esters, amines. UPVC is widely used in many applications including electrical insulation applications, pipes, sheets and films, window frames, translucent glazing, gaskets, seal frames, packaging, flexible toys, books, bottles, office equipment, etc. UPVC possess high tensils strength and high impact strength.

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