Laminate product, pulse jet filter bag, and methods for...

B - Operations – Transporting – 01 – D

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B01D 69/10 (2006.01) B01D 39/08 (2006.01) B01D 39/16 (2006.01) B01D 71/36 (2006.01) B32B 27/12 (2006.01)

Patent

CA 2337806

A laminate product is provided. The laminate product includes a first layer of porous expanded polytetrafluoroethylene membrane, and a second layer of woven fabric of polytetrafluoroethylene containing yarn. The membrane preferably has an air permeability of at least 0.31 m (0.01 cfm/ft2) 124.5 Pa at (0.5 inch water gauge), and a thickness of greater than about 12.7 µ(0.5 mil). The woven fabric preferably has a weight of between 531 g/m2 (15 ospy) and about 1023 g/m2 (30 opsy). The laminate product can be sewn to provide a filter bag for use in pulse jet filter applications.

L'invention concerne un produit stratifié. Ce produit stratifié comprend une première couche d'une membrane poreuse de polytétrafluoroéthylène expansé, et une seconde couche d'un tissu tissé en polytétrafluoroéthylène contenant un fil. La membrane présente une perméabilité à l'air d'au moins 0,01cfm/ft?2¿ sous une pression manométrique de 0,5 pouce, et une épaisseur supérieure ou égale à environ 0,5 mil. Le tissu tissé possède, de préférence, un poids compris entre environ 15 et 30 ospy. Le produit stratifié peut être cousu de façon à fournir un sac filtre utilisé dans des applications de filtre à jets pulsés.

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