Introduction
Injection-molding grade selection begins with part geometry and performance. Melt flow is useful only with its stated test condition and must be balanced with impact, stiffness, shrinkage, surface and cycle requirements.
Material Properties
- Melt flow under the specified load and temperature
- Homopolymer or copolymer impact–stiffness balance
- Color, shrinkage and any documented compliance requirements
Applications
- Household containers and consumer products
- Appliance components and industrial housings
- Selected automotive and packaging parts
Processing Methods
- Share gate design, wall thickness, flow length and machine capacity.
- Compare documented grades before conducting a machine trial.
- Evaluate molded parts after the required conditioning and test procedure.
Advantages
- More relevant grade shortlists
- Fewer avoidable molding trials
- Clearer technical inquiry documents
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