Choosing the Right Polymer Processing Method

China Manufacturing Decoded

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16d ago 36:18

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In episode 293 of China Manufacturing Decoded, Adrian is joined by Sofeast’s Head of New Product Development, Paul Adams, for the final part of their trilogy on polymers.

When people think of plastics, they usually picture injection molding. But it’s far from the only available process. We'll break down the major polymer processing methods, including injection moulding, extrusion, blow moulding, thermoforming, rotational moulding, and additive manufacturing (also known as 3D printing).

They explain:

Why your product’s geometry may rule out certain methods
The strengths and weaknesses of each process
Typical products made using each technique
How process choice impacts cost, speed, surface finish, and performance

This conversation will help you match the right process to your product and avoid costly mistakes.

Episode Sections:

00:00 – Introduction
01:05 – Why process choice matters: geometry, cost, and performance
04:55 – Injection molding: strengths, limitations, and common products
10:29 – Extrusion: pipes, profiles, and aligned mechanical properties
14:23 – Blow molding: bottles, containers, and even stadium seats
21:23 – Thermoforming: clamshell packaging, tubs, and larger liners
26:24 – Rotational molding: playground equipment, cones, and kayaks
30:34 – Additive manufacturing (3D printing): filaments and prototypes
34:52 – Wrapping up: how to decide and next steps with your manufacturer

Need help choosing the right polymer for your product? Contact us for a conversation.