Laminate material having a microfibrous polyurethanic base sheet

Details Laminate material having a microfibrous polyurethanic base sheet Laminate material having a microfibrous polyurethanic base sheet

1992-12-29

1994-01-11

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

156 622, 156167, 156242, 156279, 156283, 156290, 1563082, 428220, 428246, 428253, 428280, 428282, 428284, 428287, 428297, 428298, 428300, 428296, 4283044, 4284231, 4284235, 4284237, 428903, 428904, 4289044, 428920, 428402, B32B 700

Patent

active

052779696

ABSTRACT:
An imitation leather laminate material comprises a base sheet consisting of 50 to 90% by weight of a microfiber felt wherein said microfibers are polyethylene terephthalate or polyamide 6 or polyamide 6--6 of from 0.05 to 0.4 denier, and 50 to 10% by weight of a polyurethane-polyurea polymer having an average molecular weight corresponding to a polymer solution viscosity within the range from 10,000 to 50,000 centipoise (cps) when the solution is 25% by weight in dimethylformamide at a temperature of 20.degree. C.; the resulting base sheet has final weight within 140 to 450 g/m.sup.2 and density within 0.20 to 0.40 g/cm.sup.3 and is backed with one or more functional substrates adhered thereto.

REFERENCES:
patent: 3531368 (1970-09-01), Okamoto et al.
patent: 4663222 (1987-05-01), Ohue et al.
patent: 4868032 (1989-09-01), Elan et al.
patent: 5036551 (1991-08-01), Dailey et al.
patent: 5073436 (1991-12-01), Antonacci et al.

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