Stretch composite fabric and expanded porous...

B - Operations – Transporting – 32 – B

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B32B 5/24 (2006.01) A41D 31/00 (2006.01) A41D 31/02 (2006.01) B29C 55/02 (2006.01) B32B 27/30 (2006.01) B32B 37/00 (2006.01) C08J 9/00 (2006.01)

Patent

CA 2654885

A stretch composite fabric which comprises a stretch porous polytetrafluoroethylene film which has been burned and a stretch cloth laminated thereto while maintaining a flat state. The fabric has a tensile stress at 10% elongation, as measured in at least one direction, of 1.8 N/15 mm or less. When a 5 cm-width test piece of the stretch composite fabric is elongated in the lengthwise direction under a load of 300 g and then released from the stress, the recovery from elongation (R) which is given by the following equation is preferably 70% or more. R=(L2-L3)/(L2-L1)~100 (In the equation, L1, L2, and L3 indicate the lengths of the composite fabric before loading, under loading, and after load removal, respectively.)

Tissu composite extensible, lequel comprend un film de polytétrafluoroéthylène poreux extensible qui a été brûlé et une étoffe extensible stratifiée sur celui-ci tout en les maintenant à plat. Le tissu a une contrainte à la traction à 10 % d'allongement, telle que mesurée dans au moins une direction, inférieure ou égale à 1,8 N/15 mm. Lorsqu'on étire une éprouvette de 5 cm de large du tissu composite extensible dans la direction de la longueur sous une charge de 300 g et qu'on relâche ensuite la contrainte, la récupération après l'allongement (R), laquelle est donnée par l'équation suivante, est de préférence supérieure ou égale à 70 %. R=(L2-L3)/(L2-L1)OE00 (Dans l'équation, L1, L2 et L3 représentent leslongueurs du tissu composite avant application de la charge, sous la charge et après avoir enlevé la charge, respectivement.)

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