Laminated skin-foamed core sandwich structures and method for th

Details Laminated skin-foamed core sandwich structures and method for th Laminated skin-foamed core sandwich structures and method for th

1984-12-24

1985-09-24

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

264 41, 264 465, 4283186, 4283197, B32B 518, B32B 1704

Patent

active

045432899

ABSTRACT:
Laminated skin-foamed core sandwich structures characterized by an excellent stiffness and load-bearing capability to weight ratio are prepared by heating in a closed mold a sandwich construction that comprises skin layers that comprise a thermoplastic polymer having a glass transition temperature in the range of 75.degree. to 85.degree. C. and reinforcing fibers and a core that comprises a thermoplastic polymer that is compatible with the polymer in the skin layers and that has a glass transition temperature that is 10.degree. to 20.degree. C. lower than that of the polymer in the skin layers and a blowing agent at a temperature sufficient to fuse and expand the core and to fuse the skin layers and bond them to the expanded core.

REFERENCES:
patent: 3213071 (1965-10-01), Campbell
patent: 3272688 (1966-09-01), Holmstrom et al.
patent: 4476183 (1984-10-01), Holtrop et al.
patent: 4486492 (1984-12-01), Ziliotto

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