Integral Foam Based on Polycarbonates

Shutov, Fjodor A.; Henrici‐Olivé, G.; Olivé, S.

doi:10.1007/978-3-662-02486-7_19

Cited by 1 publication

(1 citation statement)

References 6 publications

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“…One of them is gas counter pressure (GCP), which was introduced by Balevski et al in 1978 [ 6 ]. Later, Allied Chemical Corporation introduced the Allied process [ 7 ]. In GCP IM the gas exists in the cavity before and throughout the whole process, which can avoid polymer melt bubbling and serve as packing pressure.…”

Section: Introductionmentioning

confidence: 99%

Effect of Gas Counter Pressure on the Surface Roughness, Morphology, and Tensile Strength between Microcellular and Conventional Injection-Molded PP Parts

et al. 2022

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Microcellular injection-molded parts have surface defect problems. Gas counter pressure (GCP) is one of the methods to reduce surface defects. This study investigated the effect of GCP on the surface roughness, morphology, and tensile strength of foamed and conventional injection-molded polypropylene (PP) products. GCP is generated by filling up the mold cavity with nitrogen during the injection-molding (IM) process. It can delay foaming and affect flow characteristics of microcellular and conventional injection-molding, which cause changes in the tensile strength, flow length, cell morphology, and surface quality of molded parts. The mechanism was investigated through a series of experiments including tuning of GCP and pressure holding duration. Surface roughness of the molded parts decreased with the increase in GCP and pressure holding duration. Compared to microcellular IM, GCP-assisted foaming exhibited much better surface quality and controllable skin layer thickness.

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Section: Introductionmentioning

confidence: 99%