Question 1

What is the significance of the K-value in PVC resin?

Accepted Answer

The K-value indicates the molecular weight and degree of polymerization of the PVC resin. A higher K-value (like K-67) offers better mechanical properties but requires higher processing temperatures, making it ideal for pipes. Lower K-values (like K-57) are easier to process and are used for injection molding.

Question 2

Is BIS certification mandatory for importing PVC resin into India?

Accepted Answer

Yes, the Department of Chemicals and Petrochemicals in India has mandated BIS certification (IS 17658) for PVC imports to ensure quality standards and safety.

Question 3

What is the difference between Suspension and Emulsion PVC?

Accepted Answer

Suspension PVC has larger particle sizes (100-150 microns) and is used for rigid applications like pipes and profiles. Emulsion (or paste) PVC has much smaller particle sizes (1-2 microns) and is used with plasticizers to form plastisols for coatings, toys, and synthetic leather.

Question 4

How does moisture affect PVC resin during processing?

Accepted Answer

Excess moisture can cause surface defects, bubbles, and structural weaknesses in the extruded or molded final product. It is critical to store PVC in dry conditions and pre-dry if necessary.

Question 5

What are the primary feedstocks influencing PVC prices in India?

Accepted Answer

PVC pricing is highly sensitive to the global costs of ethylene (derived from crude oil or shale gas) and chlorine (produced via chlor-alkali electrolysis), as well as ocean freight rates for imported resins.

Polyvinyl Chloride PVC Suppliers In India

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Agricultural Piping

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Window Profiles

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