Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1989-09-18
1991-04-09
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156 626, 156296, 156322, 156324, 264119, 264122, B27N 100
Patent
active
050061836
ABSTRACT:
Nonwoven fabrics are produced by mixing fibers especially textile fibers with binder powders, and by bonding the fibers and binder powders in twin-platform belt ovens for heating the powder. During this step, air is passed through the nonwoven mat or web or interlocked fibers. In order to avoid contamination of the oven with binder powder fragments detached from the nonwoven fabric, the provision is made to arrange a steaming process upstream of the air heat treatment process. The steam is to condense on the fibers or on the binder powder and to promote sticking of the powder to the fibers of the nonwoven fabric. Advantageously, a sieve drum device is employed in place of the twin-platform belt oven for the final bonding heat treatment; this device can operate herein in a much more economical fashion than the oven.
REFERENCES:
patent: 3619322 (1971-11-01), Fleissner
patent: 3770374 (1973-11-01), Fleissner
patent: 3865661 (1975-02-01), Hata et al.
patent: 3989788 (1976-11-01), Estes, Jr. et al.
patent: 4363680 (1982-12-01), Buck, Jr. et al.
patent: 4906309 (1990-03-01), Bichot et al.
Aftergut Jeff H.
Ball Michael W.
Fleissner Maschinenfabrik AG
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