Processing Characteristics of Thermoplastic Sheet Composites
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D. M. Bigg
Abstract
While there are several alternatives for producing thermoplastic sheet composites, only two have the characteristics needed for large scale manufacturing; continuous melt impregnation, and deposition of a polymer-impregnated, fiber-dispersed mat from an aqueous slurry. The most important factor affecting the melt impregnation process was found to be the rate of penetration of the molten polymer into the fiber structure. While Darcy's Law, using the Kozeny-Carmen permeation coefficient, provides an initial estimate of penetration rate, it does not adequately consider the slow flow around closely spaced fibers. The slurry deposition process incorporates the polymer directly within the fiber structure, and is not flow rate limited. The most important parameter affecting the consolidation of slurry formed mats was found to be the rate of heat transfer prior to consolidation. In both processes the time of contact between the molten polymer and glass fiber was shown to be important to the development of good adhesion.
© 1992, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Continuous Mixing and Compounds
- Starve-fed Flow in Co-Rotating Twin Screw Extruders
- Process for Improvement in Toughness of Unsaturated Polyester with Elastomer
- Mechanical Properties of Thermoplastic Polyurethane Blends and Copolymers of Styrene and Acrylonitrile
- Extrusion
- Mixing on Melting in Single Screw Extrusion
- Numerical Study of Slip at the Walls in the Extruder
- Elimination of Sag in Plastic Pipe Extrusion
- Fibers and Film
- Issues Concerning the Rate of Heat Transfer from a Spinline
- Skew Stretched Polycarbonate Films
- Molding
- Molecular Orientation in Injection-Molded Polypropylene Copolymers with Ethylene
- Melt-recrystallization of Talc-filled Polypropylene Injection Moldings
- Processing Characteristics of Thermoplastic Sheet Composites
- Rapid Communication of Recent Advances
- The Face-relief Strategy for Design of Profile Dies
Articles in the same Issue
- Contents
- Contents
- Continuous Mixing and Compounds
- Starve-fed Flow in Co-Rotating Twin Screw Extruders
- Process for Improvement in Toughness of Unsaturated Polyester with Elastomer
- Mechanical Properties of Thermoplastic Polyurethane Blends and Copolymers of Styrene and Acrylonitrile
- Extrusion
- Mixing on Melting in Single Screw Extrusion
- Numerical Study of Slip at the Walls in the Extruder
- Elimination of Sag in Plastic Pipe Extrusion
- Fibers and Film
- Issues Concerning the Rate of Heat Transfer from a Spinline
- Skew Stretched Polycarbonate Films
- Molding
- Molecular Orientation in Injection-Molded Polypropylene Copolymers with Ethylene
- Melt-recrystallization of Talc-filled Polypropylene Injection Moldings
- Processing Characteristics of Thermoplastic Sheet Composites
- Rapid Communication of Recent Advances
- The Face-relief Strategy for Design of Profile Dies
