Fusion of thermoplastic fabrics
First Claim
Patent Images
1. A method for preparing fused fabric which consists essentially of:
- (a) contacting a feed fabric comprising a substantial portion of thermoplastic fibers with a wetting agent consisting essentially of water to form a wetted fabric; and
thereafter(b) subjecting said wetted fabric to a temperature and a nip pressure along the entire length of the nip sufficient to cause fusion of at least a portion of the fibers along the entire length and width of the feed fabric.
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Accused Products
Abstract
Process and apparatus are provided for production of novel fused fabrics by treating a feed fabric comprising a substantial portion of thermoplastic fibers with wetting agent then subjecting the wetted fabric to conditions of temperature and pressure suitable to cause fusing together of at least some fibers of the fabric.
33 Citations
44 Claims
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1. A method for preparing fused fabric which consists essentially of:
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(a) contacting a feed fabric comprising a substantial portion of thermoplastic fibers with a wetting agent consisting essentially of water to form a wetted fabric; and
thereafter(b) subjecting said wetted fabric to a temperature and a nip pressure along the entire length of the nip sufficient to cause fusion of at least a portion of the fibers along the entire length and width of the feed fabric. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 38, 39, 40, 41, 42, 43)
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22. A method according to claim 2l wherein said sponge-off roll is covered with at least one layer of non-woven polypropylene fabric.
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27. A method for preparing fused fabric which consists essentially of:
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(a) contacting a feed fabric comprising a substantial portion of thermoplastic fiber with a wetting agent consisting essentially of water to form a wetted fabric; and
thereafter(b) passing the wetted fabric to the nip of nip rolls wherein at least one of the nip rolls is heated, said nip having a first temperature sufficient to raise the temperature of the wetting agent to a second temperature which is sufficient to raise the temperature of at least a portion of the fibers along the entire length and width of the fabric to their softening or stick point. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 44)
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Specification