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US 4,135,029 AGranted
Fiberglass mat
AssigneeConsolidated Fiberglass Products Company
InventorJohn R. Pfeffer
Life of this patent
Estimating the term…
Abstract
A fiberglass mat having high tear resistance which comprises a base or sheet made of chopped glass fibers, bonded together by a bonding agent. Randomly oriented, substantially continuous fiberglass strands may be embedded and bonded in the base, the strands being separated by layers of base material. The mat may also have one or more separate layers of longitudinal substantially continuous fiberglass strands, which may generally either be straight or sinusoidal, bonded into the base material.
Claims18
A fiberglass mat comprising
- a base formed by a wet process and having dispersed glass fibers bonded together by a bonding agent, said base having
- a top surface and
- a bottom surface,
- at least one distinct and separated layer of randomly oriented fiberglass strands within said base and located within a predetermined first plane intermediate said top surface and said bottom surface, and
- at least one distinct and separated layer of substantially longitudinally oriented fiberglass strands within said base and located within a predetermined second plane intermediate said top surface and said bottom surface, said first and second planes being substantially parallel to one another and separated by glass fibers and bonding agent in said base.
2 more elements
A fiberglass mat comprising
- a base formed of substantially uniformly dispersed glass fibers bonded together by a bonding agent, said base having
- a top surface, and a bottom surface, and
- a plurality of layers of randomly oriented fiberglass strands within said base and bonded thereto in distinct planes intermediate and generally parallel to said top and bottom surfaces, said distinct planes being separated from one another by glass fibers and bonding agent, said strands within each of said planes being bonded to said base and randomly bonded to one another and to themselves at longitudinally spaced locations.
A fiberglass mat comprising
- a base formed of substantially uniformly dispersed glass fibers bonded together by a bonding agent;
- and
- a plurality of separate layers of strands embedded in said base, bonded therein, and surrounded thereby, there being a volume of mat material formed of glass fibers bonded together by a bonding agent positioned between said separate layers, at least one of said layers comprising randomly oriented fiberglass strands and at least one of said layers comprising longitudinal strands of fiberglass.
A fiberglass mat comprising
- a base formed of substantially uniformly dispersed glass fibers bonded together by a bonding agent;
- and
- a plurality of separate layers of strands embedded in said base and bonded therein and surrounded thereby, there being a volume of mat material formed of glass fibers bonded together by a bonding agent positioned between said separate layers.
A fiberglass mat comprising
- a base formed of glass fibers bonded together by a bonding agent;
- and
- a plurality of separate layers of randomly oriented fiberglass strands embedded in said base and bonded therein and surrounded thereby, there being a volume of mat material formed of glass fibers bonded together by said bonding agent positioned between the layers of strands, thus providing mechanical strength at the intermediate portion of said mat between said layers of strands.
A fiberglass mat comprising
- a base formed of glass fibers bonded together by a bonding agent, said mat having a central horizontal plane;
- and
- at least two horizontal layers of fiberglass strands embedded in said base and bonded thereto, said separate layers being positioned near said central plane with ample base material between said layers to provide mechanical stength at the central part of said mat, said strands being highly resistant of tearing or severing, and providing tear-resistance in all directions throughout the mat.
Dependencies are inferred from the claim text.