Westlake 5305

Producer

Westlake Corporation

Polymer

PVC

Type

Suspension resin

K-value

59

Inherent viscosity

0.73 dl/g

Producer lists it for

Extruded or calendered sheet · Foam · Rigid profile products

What that means in practice

K59 at IV 0.73. Same viscosity as 1195 but pointed at a completely different job — sheet, foam and rigid profile rather than bottles and fittings. A clean illustration that viscosity alone does not tell you what a grade is for.

If K-values are not something you work with daily, our PVC grades and pricing guide explains what they measure and how prime, off-spec, regrind and regranulate differ.

What to check before buying Westlake 5305

• 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?

Browse the board to see what is listed today — public, no account needed. Nothing matching? Post a Wanted requirement with the grade and tonnage you need and sellers come to you. Selling it? List it — free, no commission.