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3. Process improvement
Technological advances have been implemented industrially to improve process control and the quality of injected parts:
control of foam expansion to achieve the highest possible expansion rate without penalizing the product's final properties. To achieve this, the core-back process was introduced.
improving the surface appearance of the parts obtained by pressurizing the cavity before filling.
3.1 Core-back mold opening
The polymer is injected into a thin cavity (figure 10 , step 1). After a very short holding time (step 2), during which solid skins are formed, the mold...
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Influence of material on morphology
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...Standards and norms
- AFNOR Plastics – Determination of tensile strength - NF EN ISO 8256-1 AFNOR - 2005
- AFNOR Plastics – Determination of compression properties - NF EN ISO 604 AFNOR - 2004
- AFNOR Plastics – Determination of Izod shock resistance - NF EN ISO 180 AFNOR - 2001
Patents
Nabeth, B.et al, Polypropylene resin formulation, FR 2, 978, 444.
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