Process for bonding and stretching nonwoven sheet

Details Process for bonding and stretching nonwoven sheet Process for bonding and stretching nonwoven sheet

D - Textiles, Paper

04

H

28/17

D04H 13/02 (2006.01) D04H 1/54 (2006.01)

Patent

CA 1279985

Title Process for Bonding and stretching Nonwoven Street Abstract Fibrous polyolefin nonwoven sheets are bonded and stretched in a continuous, multiple stage process. First, the sheet is heated without significant stretching to a temperature that is close to, but below, the melting of the polyolefin. Then, as the sheet is forwarded to a first stretching stage, the sheet temperature is decreased by 5 to 40°C and thereafter the sheet is alternately heated and cooled as it passes through successive stretching stages, before final cooling to below 60°C. In comparison to similar sheets bonded and stretched at constant temperature, the sheets produced by the process of the present invention are significantly more uniform in thickness.

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