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US 5,938,878 AGranted
Polymer structures with enhanced properties
AssigneeSentinel Products Corp.
InventorsRobert F. Hurley, Matthew L. Kozma, John D. Bambara, Scott C. Smith, Richard Bambara
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Abstract
Polymer structures having a laminated surface and enhanced physical properties that can be used for packaging, athletic gear (e.g., padding, water sport equipment), gaskets, and protective garments are described. The structures include a core of a relatively high density material and one or more layers laminated to the surfaces of the core material of relatively low density polymer foam. The structures can be stiff or flexible. The foam layers improve the softness of the surfaces of the core material.
Claims9
A method of producing a laminated foam comprising:
- providing a core structure having a first surface and a second surface and including a foamed polyolefin having a density of between 12 and 59 pounds per cubic foot;
- and
- laminating a first polymer foam layer to the first surface of the core structure,
- the core material and the first polymer foam layer each including a polyethylene and
- the first polymer foam layer being characterized by:
- (a) an average foam density between about 2 and 10 pounds per cubic foot and which is less than the density of the core material;
- and
- (b) a compression resistance (at 25%) which is less than the compression resistance (at 25%) of the core material.
5 more elements
Dependencies are inferred from the claim text.