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US 4,820,568 AGranted
Composite and article using short length fibers
AssigneeAllied-Signal Inc.
InventorsGary A. Harpell, H. L. Li, Y. D. Kwon, D. C. Prevorsek
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AssigneeAllied-Signal Inc.
InventorsGary A. Harpell, H. L. Li, Y. D. Kwon, D. C. Prevorsek
Estimating the term…
The present invention is an improved prepreg layer, multilayer composite based on the improved prepreg layer, and article made from the multilayer composite. The prepreg layer of the present invention comprises an array of at least two adjacent, coplanar fibrous elements. Each element comprises a plurality of unidirectional coplanar fibers embedded in a polymeric matrix. The fibers are up to eight inches, preferably one to eight inches, and more preferably two to six inches long. The prepreg layer of the present invention is useful to make a multilayer composite comprising a plurality of the prepreg layers as recited above. The fibers of adjacent layers are at an angle of about 90.degree. from each other. The composite preferably has 2 to 500, more preferably 10 to 150, and most preferably 60 to 120 layers.
A prepreg layer comprising an array of at least two adjacent coplanar fibrous elements, with each element comprising a plurality of unidirectional fibers embedded in a polymeric matrix, the fibers being up to eight inches in length, the adjacent elements connected by the polymer matrix.
A multilayer composite comprising a plurality of prepreg layers where each prepreg layer comprises an array of at least two adjacent coplanar fibrous elements, with each element comprising a plurality of unidirectional fibers embedded in a polymeric matrix, the fibers being up to eight inches in length and the fibers of adjacent layers being of an angle of about 90.degree. from each other.
An article comprising a multilayer composite comprising a plurality of prepreg layers, where each prepeg layer comprises an array of at least two adjacent fibrous elements, with each element comprising a plurality of unidirectional fibers embedded in a polymeric matrix, the fibers being up to eight inches in length and the fibers of adjacent layers being at an angle of about 90.degree. from each other.
A multilayer composite comprising a plurality of prepreg layers where each prepreg layer comprises an array of at least two adjacent coplanar fibrous elements, with each element comprising a plurality of square woven fibers embedded in a polymeric matrix, the fibers being up to eight inches in length.
Dependencies are inferred from the claim text.