Plastic Industry Terms
There are 412 entries in this glossary.
All
| Term | Definition |
|---|---|
| Necking |
The localizing reduction in cross-section which may occur in a material when deformed. (ASTM D-883-65T). This phenomenon can occur in extrusion under certain conditions as the extrudate leaves the die, but the term most often refers to the cold drawing of fibres at temperatures below their melting points. Fibres of cyrstalline and some crystalline thermpolastics, e.g. polyethylene, exhibit necking at a critical stress near the yield point. |