Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1983-01-17
1985-01-15
Bell, James J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
156220, 156290, 428156, 428170, 428195, 428288, 428296, 428903, B32B 514
Patent
active
044938683
ABSTRACT:
Production of high bulk nonwoven materials particularly useful as wipers and the like having a varying pattern of bonds and cloth-like feel. In one embodiment the method includes opposed, varying, high density bonding patterns on opposite sides of the materials formed by contact with surfaces having varyingly shaped or sided lands and grooves. Where both surfaces are contacted by such lands and grooves, increased spacing in the unbonded areas permits high loft, essentially unbonded fiber portions between the bond points. Construction of the individual land areas is preferable with tapered sides with vertical so as to permit engraving and high bond density and pattern depth while reducing wear. Resulting products have unique softness and absorbency characteristics for improved wipers because of the bond constructions. In addition, a wide variety of attractive patterns may be obtained. Preferred thermoplastic materials include spunbonded or meltdown polypropylene alone or in combination with wood cellulose and/or staple textile fibers.
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patent: 4078124 (1978-03-01), Prentice
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patent: 4170680 (1979-10-01), Cumbers
patent: 4315965 (1982-02-01), Mason et al.
patent: 4333979 (1982-06-01), Sciaraffa et al.
Bell James J.
Herrick William D.
Kimberly-Clark Corporation
Olevsky Howard
Peters R. Jonathan
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