High pressure laminates
First Claim
1. In a high pressure decorative laminate comprising a plurality of layers and adhesive means rigidly securing said layers together to provide a self-sustaining laminate, said layers including a plurality of phenolic layers, and a synthetic resin-containing layer having a tendency to shrink under conditions of low humidity thereby tending to cause deformation of the laminate, the improvement comprising the fact that said plurality of layers includes two steel foil layers, each layer being at least approximately 0.002 inch in thickness, both steel foil layers being located on the same side of said synthetic resin-containing layer but being separated from each other by at least one of said phenolic layers.
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Accused Products
Abstract
Dimensional stability of melamine decorative laminates is improved by a pair of spaced, foraminous steel foil layers, which resist shrinkage of the melamine layer. Steel foil layers are also used to prevent splitting of low-strength wallboard cores as a result of shrinkage of melamine facings, and each facing need have only a single steel foil layer in the case of a wallboard.
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Citations
21 Claims
- 1. In a high pressure decorative laminate comprising a plurality of layers and adhesive means rigidly securing said layers together to provide a self-sustaining laminate, said layers including a plurality of phenolic layers, and a synthetic resin-containing layer having a tendency to shrink under conditions of low humidity thereby tending to cause deformation of the laminate, the improvement comprising the fact that said plurality of layers includes two steel foil layers, each layer being at least approximately 0.002 inch in thickness, both steel foil layers being located on the same side of said synthetic resin-containing layer but being separated from each other by at least one of said phenolic layers.
- 6. In a wallboard comprising a low-strength wallboard core having facings on both of its sides, at least one of said facings comprising a synthetic resin-containing layer having an exposed surface and having a tendency to shrink under conditions of low humidity thereby tending to cause said core to split, the improvement comprising a first sheet of steel secured between the core and the exposed surface of the synthetic resin-containing layer, and a second sheet of steel secured on the opposite side of said core each of said steel sheets being at least approximately 0.002 inch in thickness.
Specification