Barrier fabrics and methods of making same

Details Barrier fabrics and methods of making same Barrier fabrics and methods of making same

1992-09-22

1993-08-17

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156243, 128849, 428241, 428257, 428258, 428266, 428405, 428446, 428447, B32B 3104

Patent

active

052365328

ABSTRACT:
A liquid impermeable barrier fabric which resists penetration of liquids under finite hydraulic heads and maintains that capable after upwards of 75 institutional washing/sterilization cycles. The barrier fabric is structurally characterized by a silicone membrane attached to a fabric substrate. The substrate is a tightly woven fabric which is constructed of polyester yarns. Attachment of the membrane to the fabric substrate by a bonding mechanism in which the silicone material is in intimate contact with a substantial portion of the looped portions of the yarn, which define the surface of the fabric. This bonding mechanism also includes hydrophilicity of the yarn surfaces with which the silicone is in intimate contact. The fabric is treated with a hydrophilic finish to provide this aspect of the bonding mechanism. This barrier fabric is provided through the use of coating/calendaring apparatus. A film of highly viscous, uncured silicone is formed with a Mooney viscosity of 45 and then pressed between rollers, into a fabric web, to attain the referenced intimate contact. The silicone is then cured.

REFERENCES:
patent: 3956048 (1976-05-01), Nordgren
patent: 4898761 (1990-02-01), Dunaway et al.
patent: 4929303 (1990-05-01), Sheth
patent: 5027438 (1991-07-01), Schwarze et al.
patent: 5169712 (1992-12-01), Tapp

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