Composite sheet having elasticity, elastic web made from thermoplastic elastomer, and method and apparatus of manufacturing the same
AssigneesNippon Petrochemicals Company, Limited, Polymer Processing Research Institute Ltd.
InventorsKazuhiko Kurihara, Hiroshi Yazawa, Kenichi Kobayashi
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Abstract
A composite sheet comprises a nonwoven fabric and a rubber elastic material bonded onto the nonwoven fabric. The nonwoven fabric has nonelastic fibers aligned in one direction and has elongation of 100% or higher in a direction perpendicular to the aligned direction of the nonelastic fibers. The rubber elastic material is bonded to the nonwoven fabric in a pattern having orientation perpendicular to the aligned direction of the nonelastic fibers.
Claims45
A composite sheet comprising:
- a nonwoven fabric including nonelastic fibers aligned in one direction and having elongation of 100% or higher in a direction cross to the aligned direction of said nonelastic fibers;
- and
- a rubber elastic material bonded onto said nonwoven fabric in a pattern having orientation cross to the aligned direction of said nonelastic fibers.
A method of manufacturing a composite sheet comprising the steps of:
- composing a nonwoven fabric including nonelastic fibers aligned in one direction;
- and
- bonding a rubber elastic material onto said nonwoven fabric with orientation cross to the aligned direction of said nonelastic fibers.
A elastic web comprising one or a plurality of laminated elongated webs with its contractile force eliminated in an elongated state by holding one or a plurality of material webs including a thermoplastic elastomer and having air holes at a temperature equal to or higher than a flow beginning temperature of said thermoplastic elastomer in the elongated state.
A method of manufacturing a elastic web comprising the steps of:
- forming one or a plurality of material webs including a thermoplastic elastomer and including air holes;
- elongating said material web in at least one direction;
- and
- heating said elongated web at a temperature equal to or higher than a flow beginning temperature of said thermoplastic elastomer to eliminate a contractile force of said material web in the elongated state.
An apparatus for manufacturing a composite sheet comprising:
- a spinning unit for spinning nonelastic fibers to form a nonwoven fabric having said fibers aligned in one direction;
- a stretching unit for stretching the nonwoven fabric formed by said spinning unit in the same direction as the aligned direction of said fibers;
- and
- a bonding unit for bonding a rubber elastic material onto the nonwoven fabric stretched by said stretching unit with orientation cross to the aligned direction of said fibers.
Dependencies are inferred from the claim text.