Back SearchTitle: EFFECT OF WELD LINES ON THE INJECTION MOULDING OF STRUCTURAL FOAMS. I. FOAM MORPHOLOGY
Page Range: p.313-327
Author(s): Leduc S; Rodrigue D
File size: 2109K
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Issue Year: cp
Volume: 24
Issue No: No. 6
Abstract
The effects of injection moulding conditions on weld lines and the morphology of high density polyethylene structural foams were investigated experimentally for variations in density related to screw stroke (amount of material injected) and injection speed, using optical microscopy. The results are discussed in terms of cell size and skin thickness. 16 refs.
Title: PREDICTION OF CUSHION CURVES FOR CLOSED CELL POLYETHYLENE-BASED FOAMS. PART I. MODELLING
Page Range: p.329-346
Author(s): Ruiz-Herrero J L; Rodriguez-Perez M A; de Saja J A
File size: 218K
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Issue Year: cp
Volume: 24
Issue No: No. 6
Abstract
The prediction of the cushioning performance of closed-cell polyethylene foams under compressive impacts was investigated using simple theoretical models amended to take into account the variation of gas volume with density, the effect of the falling weight, and the base polymer effect. The predictions of the models are discussed in comparison with experimental data. 23 refs.
Title: CRITICAL ISSUES IN EXTRUSION FOAMING OF PLASTIC/WOODFIBER COMPOSITES (REVIEW)
Page Range: p.347-362
Author(s): Rizvi G M; Guo G; Park C B; Kim Y S
File size: 1311K
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Issue Year: cp
Volume: 24
Issue No: No. 6
Abstract
Recent developments in the foaming of composites of various polymers such as high-density polyethylene or polystyrene with wood fibres are reviewed. Critical issues in extrusion foaming of the composites, including fibre dispersion, viscosity, volatiles from wood fibres, processing conditions, and the use of chemical or physical blowing agents, are discussed. 36 refs.