A mat useful for reinforcing composite materials is made up of at least first and second sets of fibers, the first set of fibers laid as a ply in spaced apart parallel relationship in the direction of construction and the second set laid as a ply in spaced apart parallel relationship perpendicular t
A mat useful for reinforcing composite materials is made up of at least first and second sets of fibers, the first set of fibers laid as a ply in spaced apart parallel relationship in the direction of construction and the second set laid as a ply in spaced apart parallel relationship perpendicular to the direction of construction. These fibers define interstices, into which a continuous filament is knitted to provide stability. The filament has a core portion and a sheath portion, the sheath portion having a lower melting point than the core portion. The sheath portion is thermally fusible to form a plurality of closed loops in which the respective sets of fibers are entrapped. The fibers are glass or glass rovings and the filament is a polyester, the core portion being a high-viscosity poly(ethylene terephthalate) and the sheath portion being a low-viscosity poly(ethylene terephthalate).
대표청구항▼
What is claimed is: 1. A mat for reinforcing composite materials comprising a plurality of first and second sets of fibers, each of said first and second set of fibers include a plurality of fibers, glass ravings or combinations thereof, said plurality of said first set of fibers laid as a ply in s
What is claimed is: 1. A mat for reinforcing composite materials comprising a plurality of first and second sets of fibers, each of said first and second set of fibers include a plurality of fibers, glass ravings or combinations thereof, said plurality of said first set of fibers laid as a ply in spaced apart parallel relationship in a direction of construction, said plurality of said second set of fibers laid as a ply in spaced apart parallel relationship in a direction non-parallel to said direction of construction wherein said plurality of said second set of fibers has a position relative to said plurality of said first set of fibers to form a plurality of interstices, and a filament at least partially knitted into a plurality of said interstices to provide stability to said plurality of said first and second set of fibers, said filament encircling a plurality of said fibers in one of said first sets of fibers and a plurality of fibers in one of said second set of fibers at said interstices of said first and second set of fibers so as to at least partially secure said plurality of fibers together at said interstices, said filament including an outer surface having a lower melting point than said plurality of said first and second set of fibers, said filament thermally fused together at overlapping regions of said filament at said interstices to form a plurality of closed loops about a plurality of fibers in each of said first and second set of fibers, said plurality of fibers of said first and second set of fibers being in a non-melted state relative to one another, at least a portion of said fibers are not bonded with said filament. 2. The reinforcing mat as defined in claim 1, including a third set of fibers laid as a ply between said first and said second sets of fibers, each of said third set of fibers includes a plurality of fibers, glass rovings or combinations thereof, said third set of fibers laid in spaced apart parallel relationship and non-parallel to said direction of construction, a plurality of fibers of said third set of fibers at least partially entrapped within a plurality of said closed loops. 3. The reinforcing mat as defined in claim 1, wherein the filament is a mono-filament construction. 4. The reinforcing mat as defined in claim 2, wherein the filament is a mono-filament construction. 5. The reinforcing mat as defined in claim 1, wherein said filament includes a core portion and a sheath portion, said sheath portion having a melting point that is lower than a melting point of said core portion. 6. The reinforcing mat as defined in claim 2, wherein said filament includes a core portion and a sheath portion, said sheath portion having a melting point that is lower than a melting point of said core portion. 7. The reinforcing mat as defined in claim 4, wherein said filament includes a core portion and a sheath portion, said sheath portion having a melting point that is lower than a melting point of said core portion. 8. The reinforcing mat as defined in claim 5, wherein said filament includes a high-viscosity polyester core portion and a low-viscosity polyester sheath portion. 9. The reinforcing mat as defined in claim 6, wherein said filament includes a high-viscosity polyester core portion and a low-viscosity polyester sheath portion. 10. The reinforcing mat as defined in claim 7, wherein said filament includes a high-viscosity polyester core portion and a low-viscosity polyester sheath portion. 11. The reinforcing mat as defined in claim 3, including a fourth set of fibers laid substantially perpendicular to said third set of fibers, each of said fourth set of fibers include a plurality of fibers , glass rovings or combinations thereof, a plurality of said fibers of said fourth set of fibers at least partially entrapped within a plurality of said closed loops. 12. The reinforcing mat as defined in claim 2, including a fourth set of fibers laid substantially perpendicular to said third set of fibers, each of said fourth set of fibers include a plurality of fibers, glass rovings or combinations thereof, a plurality of said fibers of said fourth set of fibers at least partially entrapped within a plurality of said closed loops. 13. The reinforcing mat as defined in claim 10, including a fourth set of fibers laid substantially perpendicular to said third set of fibers, each of said fourth set of fibers include a plurality of fibers, glass rovings or combinations thereof, a plurality of said fibers of said fourth set of fibers at least partially entrapped within a plurality of said closed loops. 14. The reinforcing mat as defined in claim 9, including a fourth set of fibers laid substantially perpendicular to said third set of fibers, each of said fourth set of fibers include a plurality of fibers, glass rovings or combinations thereof, a plurality of said fibers of said fourth set of fibers at least partially entrapped within a plurality of said closed loops. 15. The reinforcing mat as defined in claim 9, wherein at least a portion of said fibers of said third set of fibers are not bonded with said filament. 16. The reinforcing mat as defined in claim 13, wherein at least a portion of said fibers of said third set of fibers are not bonded with said filament. 17. The reinforcing mat as defined in claim 14, wherein at least a portion of said fibers of said fourth set of fibers are not bonded with said filament. 18. The reinforcing mat as defined in claim 16, wherein at least a portion of said fibers of said fourth set of fibers are not bonded with said filament.
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이 특허에 인용된 특허 (9)
Bruner Jeffrey W. ; Stevenson Peter E., Bonded composite knitted structural textiles.
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