Experimental analysis of plastic sheet extrusion

Marinelli, J. M.; Lee, L. James

doi:10.1002/adv.1985.060050402

Adv Polym Technol

1985

DOI: 10.1002/adv.1985.060050402

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Experimental analysis of plastic sheet extrusion

J. M. Marinelli

L. James Lee

Abstract: Analysis of a plastic sheet extrusion line was carried out using a 2. 5-in. extruder

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1989

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Analysis of molecular orientation and internal stresses in extruded plastic sheets

Chan

Lee

1989

Polymer Engineering & Sci

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The development of molecular orientation and internal stresses in extruded sheet made of polypropylene was analyzed, and their correlations to operating conditions such as draw ratio, cooling rate, die temperature, melt temperature, and die gap opening were studied. Measurements of attenuated‐total‐reflectance infrared dichroic ratio for the surface molecular orientation, birefringence for the orientation stress distribution in the thickness direction, and free shrinkage ratio for the overall frozen‐in stresses were carried out to determine the amount of orientation stresses in the extruded samples. As expected, the overall orientation stress depends strongly on draw ratio, while higher melt temperature reduces the overall orientation. It was found that faster cooling rates and lower die temperatures cause surface orientation stresses to increase as the core orientation stresses remain almost unchanged.

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Analysis of molecular orientation and internal stresses in extruded plastic sheets

Chan

Lee

1989

Polymer Engineering & Sci

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Experimental analysis of plastic sheet extrusion

Abstract: Analysis of a plastic sheet extrusion line was carried out using a 2. 5-in. extruder

Cited by 1 publication

References 22 publications

Analysis of molecular orientation and internal stresses in extruded plastic sheets

Analysis of molecular orientation and internal stresses in extruded plastic sheets

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