Process for developing porosity in air impervious film and artic

Details Process for developing porosity in air impervious film and artic Process for developing porosity in air impervious film and artic

1983-10-19

1985-10-22

Anderson, Philip

Beds

Bedclothing

And means to facilitate changing thereof

5481, 264 468, 264101, 264156, 297256, 297DIG1, A47C 2714, B29D 2704

Patent

active

045479208

ABSTRACT:
A process for developing porosity in air impervious film. The process is disclosed for fabricating a cushion article having a cover provided with increased air flow capabilities. A covering is provided for a cushion body, the covering including a laminated film and, preferably, an outer fabric layer. The film includes a first layer having a relatively high temperature melting point and a second layer having a relatively low temperature melting point. The first layer includes perforations, and the second layer is continuous and air impervious. The laminated film is heated at a temperature which approaches or is above the melting temperature of the second layer but below the melting temperature of the first layer to melt the second layer at least in areas coincident with the perforations in the first layer to form air flow passages through the film laminate.

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