Formolon 622R

Producer

Formosa Plastics Corporation, U.S.A.

Polymer

PVC

Type

Suspension resin

K-value

61

Producer lists it for

Rigid calendering · Rigid foam and profile · Bottles

What that means in practice

Despite the 622 name this is K61, not K65 — closer to 616K than to the rest of its own family, and listed for the same rigid calendering, foam profile and bottle work. A good example of why the number in the grade name is not the K-value.

If K-values are not something you work with daily, our PVC grades and pricing guide explains what the number is measuring and how rigid, flexible, resin, compound and regrind differ.

What to check before buying Formolon 622R

• Confirm the K-value on the batch, not just the grade name — low-K grades are chosen for flow, and a drift upward changes how it fills.
• Ask what it was intended for. Low-K resin sold as general-purpose will disappoint in an application that needed mechanical strength.
• For anything moulded, ask about colour consistency and regrind content if it is not prime.

Buying or selling this?

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