Recyclable vehicular cushioning material and seat
AssigneeToyo Boseki Kabushiki Kaisha
InventorsHideo Isoda, Mitsuhiro Sakuda, Yoshihiro Amagi, Kenji Tanaka, Kunio Kimura, Michio Kobayashi, Tadaaki Hamaguchi, Seiji Sawahara
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Abstract
A recyclable vehicular cushioning material which is thermoformed from a web composed of three-dimensionally crimped polyester fiber having a fineness lower than 45 denier per filament and an initial tensile strength (IS) higher than 30 g/d and heat-bonding fiber containing polyester elastomer, as heat-bonding component, which are mixed and dispersed and, if necessary, interlaced, said cushioning material having a layer whose bulk density is 0.02-0.06 g/cm.sup.3.
Claims6
A vehicular cushioning material which is thermoformed from a web composed of
- (A) three-dimensionally crimped polyester fiber
- (1) having a fineness lower than 45 denier per filament,
- (2) having an initial tensile strength (IS) higher than 35 g/d,
- (3) having a crimp index (Ci) higher than 15%,
- (4) having a crimp number (Cn) greater than 10/inch, and
- (5) satisfying the following condition:
- IS.gtoreq.(.DELTA..epsilon.+0.6).sup.-2.8 .times.10.sup.3 +10
- where .DELTA..epsilon. denotes the elongation (%) at the elastic limit, including the elongation of crimp, which is measured after dry-heat treatment at 200.degree. C. for 5 minutes under no load;
- and
- (B) a heat-bonding fiber of the sheath-core type containing p2 (1) a polyester elastomer comprising a block copolymer as the heat-bonding component, and
- (2) a non-elastomeric core,
- which are mixed and dispersed and, optionally interlaced;
- said cushioning material having a layer whose bulk density is 0.02-0.06 g cm.sup.3.
Dependencies are inferred from the claim text.