Reinforcement sheet
AssigneesTeijin Limited, Gunze Limited
InventorsToshimasa Kuroda, Yoshimi Tanaka, Takashige Oka, Kouichi Yamada, Nobutaka Kiyohara, Akihiro Sato, Mitsuo Hosoi
Life of this patent
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Abstract
The disclosed reinforcement sheet is a knitted fabric formed from a plurality of reinforcing yarns 5 and a plurality of matrix yarns 9, wherein the reinforcing yarns are held in the linear state without being bent, arranged in parallel to and spaced from one another in a matrix knitting structure, and the matrix yarns cover the linear reinforcing yarns, without bending the linear reinforcing yarns, to form the matrix knitting structure.
Claims9
A reinforcement sheet having a knitting structure comprising a plurality of reinforcing yarns 5, a plurality of matrix yarns 9 and a plurality of heat-fusion-bondable yarns 6 (6a, 6b, 6c), wherein (1) the reinforcing yarns are held in the linear state without being bent, and at least one reinforcing yarn is doubled, mixed, entangled, or double-twisted with at least one heat-fusion-bondable yarn or arranged between at least two heat-fusion-bondable yarns 6 to form composite yarns, (2) the composite yarns are arranged in parallel to and spaced from one another, (3) the matrix yarns are knitted around the composite yarns to cover the composite yarns whereby a plurality of repeating knitting units P, which are in parallel to one another, are formed and said knitting units are connected to one another to form a continuous matrix knitting structure, (4) the total volume fraction of the composite yarns is 30 to 60%, and (5) the volume ratio of the reinforcing yarns to the entire sheet is 40 to 70%.
Dependencies are inferred from the claim text.