Structural laminate
AssigneeThe Celotex Corporation
InventorsDonald E. Hipchen, Michael J. Skowronski, Joseph R. Hagan
Life of this patent
Estimating the term…
Abstract
A structural laminate comprises at least one planar facing sheet with a rigid foam attached to one surface of the facing sheet. The rigid foam may be any polymeric material which is capable of being foamed. Distributed substantially evenly throughout the foam is a mat of long straight glass fibers arranged in layers substantially parallel to the facing sheet. The process for producing this structural laminate comprises the steps of contacting a thin, substantially incompressible yet expansible mat of long straight glass fibers with a foam-forming mixture on each face of the mat, and passing the facing sheets having the mat and the foam-forming mixture there between through the nip of two rotating rolls.
Claims15
A structural laminate comprising:
- A. at least one planar facing sheet;
- B. a rigid foam attached to one surface of the facing sheet, the rigid foam formed from a foam-forming mixture;
- and
- C. glass fibers wherein:
- I. the glass fibers are distributed substantially evenly throughout the rigid foam,
- II. the glass fibers are straight,
- III. the glass fibers are greater than one foot in length,
- IV. the glass fibers are arranged in layers,
- V. each layer of glass fibers is substantially parallel to the facing sheet, and
- VI. the rigid foam completely fills the interstices between the glass fibers, the glass fibers being held in fixed relationship with respect to each other solely by the rigid foam.
A structural laminate comprising:
- A. two planar facing sheets;
- B. a rigid foam attached between the facing sheets, the rigid foam formed from a foam-forming mixture;
- and
- C. glass fibers wherein:
- I. the glass fibers are distributed substantially evenly throughout the rigid foam,
- II. the glass fibers are non-crimped,
- III. the glass fibers are greater than one foot in length,
- IV. the glass fibers are arranged in layers,
- V. each layer of glass fibers is substantially parallel to the facing sheet,
- VI. the glass fibers within each layer are substantially parallel,
- VII. the glass fibers in each layer are at an acute angle to the glass fibers in each next adjacent layer, and
- VIII. the rigid foam completely fills the interstices between the fibers, the fibers being held in fixed relationship with respect to each other solely by the rigid foam.
A structural laminate comprising:
- A. two planar facing sheets;
- B. a rigid foam attached between the facing sheets, the rigid foam formed from a foam-forming mixture;
- and
- C. glass fibers wherein:
- I. the glass fibers are distributed substantially evenly throughout the rigid foam,
- II. the glass fibers are non-crimped,
- III. the glass fibers have an average length which is from five to twleve feet,
- IV. the glass fibers are arranged in layers,
- V. each layer of glass fibers is substantially parallel to the facing sheet,
- VI. the glass fibers within each layer are substantially parallel;
- VII. the glass fibers in each layer are at an angle of less than 60.degree. to the glass fibers in each next adjacent layer, and
- VIII. the rigid foam completely fills the interstices between the fibers, the fibers being held in fixed relationship with respect to each other solely by the rigid foam.
Dependencies are inferred from the claim text.