Thermally apertured nonwoven product and process for making same

Details Thermally apertured nonwoven product and process for making same Thermally apertured nonwoven product and process for making same

1995-06-05

1997-08-12

Stemmer, Daniel

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 628, 1563096, 428137, B32B 310, B32B 3120

Patent

active

056561199

ABSTRACT:
A process for producing an apertured nonwoven fabric combines one or two outer nonwoven layer(s) with a layer of polymeric material having a lower melting temperature and a property of shrinking when melted. Heat and pressure are applied through a calender roll such that the polymeric material becomes bonded to the fibers of the nonwoven layer(s) and simultaneously shrinks and takes back the fibers away from the calendering points, thereby generating apertures through the nonwoven fabric. Preferably, the fibers are polyethylene or polypropylene fibers, and the layer of polymeric material is a thin plastic film of polyethylene stretch-wrap, elastomeric, or heat shrink material. One outer nonwoven layer may be combined with the plastic film layer to form a bi-laminate product, or two outer nonwoven layers may be combined with an intermediate plastic film to form a tri-laminate product. Low denier polypropylene/polyethylene bi-component fibers or a blend of higher and lower melting fibers may also be used. Apertured products can also be obtained with non-thermoplastic outer layers and an intermediate plastic film layer.

REFERENCES:
patent: 3221738 (1965-12-01), Ekberg et al.
patent: 3507943 (1970-04-01), Such et al.
patent: 3542634 (1970-11-01), Such et al.
patent: 3575764 (1971-04-01), McFarren
patent: 3620906 (1971-11-01), Hannes
patent: 3678933 (1972-07-01), Moole
patent: 3695967 (1972-10-01), Ross
patent: 3850785 (1974-11-01), McQuade et al.
patent: 3925127 (1975-12-01), Yoshioka
patent: 4184902 (1980-01-01), Karami
patent: 4348444 (1982-09-01), Craig
patent: 4355066 (1982-10-01), Newman
patent: 4588630 (1986-05-01), Shimalla
patent: 4726976 (1988-02-01), Karami et al.
patent: 4758297 (1988-07-01), Calligarich
patent: 4780352 (1988-10-01), Palumbo
patent: 4842596 (1989-06-01), Kielpikowski et al.
patent: 5364681 (1994-11-01), Pate
McGraw-Hill Dictionary of Scientific and Technical Terms, 3rd, Ed., (1984), p. 238.
Encyclopedia of Polymer Science and Engineering, vol. 7, p. 98 (.COPYRGT.)1937.

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