Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1989-02-06
1989-11-07
Weston, Caleb
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156160, 156163, 156164, B32B 3120
Patent
active
048789747
ABSTRACT:
A method of producing a waterproof, gas-permeable composite sheet comprising the steps of: (a) preparing a film from a composition comprising 40-70 weight % of an ethylene-propylene-diene copolymer and 30-60 weight % of an ethylene-vinyl acetate copolymer; and (b) adhering the film to a woven or nonwoven fabric by hot pressing while causing the heat shrinkage of the film simultaneously, thereby making the film microporous. The composition may further contain linear low-density polyethylene to improve film-forming properties. By subjecting the hot-pressed composite sheet to a plurality of heating-cooling steps, it is provided with high heat resistance. In addition, by foaming the film and hot-pressing it to a stretchable woven or nonwoven fabric and then stretching, the composite sheet is further provided with high stretchability.
REFERENCES:
patent: 3741841 (1973-06-01), Toyoda et al.
patent: 3959051 (1976-05-01), Schirmer
Tonen Sekiyukagaku Kabushiki Kaisha
Weston Caleb
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