Method for forming a composite elastic material

B - Operations – Transporting – 32 – B

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B32B 3/24 (2006.01) A61F 13/15 (2006.01) B29D 7/00 (2006.01) B32B 27/06 (2006.01) B32B 38/04 (2006.01)

Patent

CA 2258845

A method for forming a composite elastic material. A thermoplastic film (130) is extruded from an extruder (132). The thermoplastic film (130) is fed while still in a molten condition onto a rotating forming structure (115) exhibiting a multiplicity of apertures therein. A pneumatic vacuum is applied to the thermoplastic film (130) to produce apertures in the thermoplastic film. An elastic member (100) having at least one elastic strand is placed against a surface of the thermoplastic film (130) while the thermoplastic film (130) is still in a molten condition.

L'invention concerne un procédé de formation d'un matériau élastique composite. Un film thermoplastique (130) est extrudé dans une extrudeuse (132), et est amené, toujours à l'état fondu, sur une structure de formation rotative (115) présentant une multitude de trous. Le film thermoplastique (130) est soumis à une aspiration pneumatique de sorte que des trous soient formés dans celui-ci, et un élément élastique (100), constitué d'au moins un fil de base élastique, est placé contre une surface du film thermoplastique (130) alors que ce dernier est toujours à l'état fondu.

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