Press-cushion sheet
AssigneeTeijin Limited
InventorsNoboru Takimoto, Syuichi Shimeno, Makoto Tanaka, Tadashi Seki
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Abstract
A press-cushion sheet having an enhanced durability in practical use comprises a three- to six-ply woven fabric composed of heat resistant fiber spun warp and weft yarns with a cotton count of 2 to 10 and having warp and weft densities of 80-170 yarns/2.54 cm and 50-160 yarns/2.54 cm respectively, the individual warp yarns in the fabric are bent in the form of waves and have a bending coefficient (BC) of from 1 to 30 determined in accordance with the equation (I): ##EQU1## wherein d represents a thickness of the fabric and n represents the wave number of the warp yarns bent in the form of waves, per 10 cm of the fabric, and optionally, a heat-resistance resin impregnated in the fabric.
Claims8
A press-cushion sheet comprising a multiple-ply woven fabric having three- to six-ply weave structure and composed of warps and wefts consisting of heat-resistant fiber spun yarns with a cotton count of 2 to 10 and having a warp density of from 80 to 70 yarns/2.54 cm and a weft density of from 50 to 60 yarns/2.54 cm, said warp yarns being bent in the form of waves in the three- to six-ply weave structure, and having a bending coefficient of from 1 to 30 determined in accordance with the equation (I):
- ##EQU2## wherein BC represents the bending coefficient of each warp yarn, d represents a thickness in mm of the multiple-ply woven fabric and n represents the wave number of the warp yarns bent in the form of waves, per 10 cm of the multiple-ply woven fabric in the warp direction thereof.
Dependencies are inferred from the claim text.