Water vapor permeable microporous sheet materials and their meth

Details Water vapor permeable microporous sheet materials and their meth Water vapor permeable microporous sheet materials and their meth

1973-06-11

1978-05-16

Anderson, Philip

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

260 25AY, 264 41, 264 451, 264 458, 264 49, 428306, 428904, B29D 2704, B32B 326

Patent

active

040900100

ABSTRACT:
There is disclosed a process in which both non-solvent e.g., water and filler particles e.g., microscopic sodium chloride are added in certain proportions to a polymer solution e.g., polyurethane in dimethylformamide preferably at elevated temperature and coagulated by immersion in non-solvent. This results in a more rapid coagulation time than when solvent or filler alone are used and also results in a microporous product of improved properties and novel pore structure.

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Bernhardt, Ernest C., Edt. "Processing of Thermoplastic Materials," New York, Reinhold, .COPYRGT. 1959, pp. 15-22.
McKelvey, James M. "Polymer Processing," New York, John Wiley and Sons, .COPYRGT. 1962, pp. 31-36.
Dunn; Jerome L. and Charles Kahn, "Flow Control of Plastisols," in 1970-1971 Modern Plastics Encyclopedia, pp. 372, 376, 378, 380.

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