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US 5,328,937 AGranted
Foam based cork substitute
AssigneeGaska Tape, Inc.
InventorLawrence A. Cascino
Life of this patent
Estimating the term…
Abstract
A foam spacer which is usable as a cork substitute in the base cushion layer of a glass spacer. The spacer, which is adapted to replace natural cork spacers is preferably laminated to a tack layer or otherwise adhered to a surface. The spacer is formed from a plasticized foamable resin which includes a quantity of incorporated reinforcing agents.
Claims12
A foam layer comprising:
- 100-120 parts by weight of a foamable vinyl chloride resin;
- 40-50 parts by weight of a phthalate plasticizer;
- 35-50 parts by weight of ceramic fibers of a length between 5 microns-30 microns and a thickness of between 0.5 microns-10 microns;
- and
- a blowing agent wherein said foam layer is possessed of strength and recovery properties similar to those of natural cork.
2 more elements
A method of making a foam layer which mimics the physical properties of cork comprising the steps of:
- a) providing a quantity of foamable vinyl chloride resin, phthalate plasticizer and reinforcing ceramic fibers of a length between 5 microns-30 microns and of a thickness between 0.5 microns-10 microns;
- b) mixing said foamable resin;
- phthalate plasticizer and ceramic fibers to form a plastisol;
- c) casting said plastisol onto a release surface, and
- d) heating said plastisol to expand the plastisol and form said foam layer.
2 more elements
Dependencies are inferred from the claim text.