Block-resistant partial polyvinyl butyval

Details Block-resistant partial polyvinyl butyval Block-resistant partial polyvinyl butyval

1994-12-19

1996-08-20

Nakarani, Dhirajlal

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428147, 428206, 4284244, 4284256, 428436, 428437, 428525, 428906, B32B 310, B32B 516

Patent

active

055477364

ABSTRACT:
A plastic sheet, preferably of plasticized partial polyvinyl butyral, for a laminated safety glazing, having means dispersed on its surface, preferably comprising a multiplicity of spaced projections, capable of resisting adhesion to a rigid panel, such as glass, of such a glazing when the sheet is laminated to the panel, the area of the sheet surface without such dispersed means having high affinity for adhesion. The projections physically block adhesion of a dispersed area of the sheet to the panel in that the means on the sheet surface have no or weak interfacial adhesion. The multiplicity of space projections also have low or no affinity for adhesion when in blocking contact with each other or with another plasticized partial polyvinyl butyral surface and thereby increase blocking resistance.

REFERENCES:
patent: 3881043 (1975-04-01), Rieser et al.
patent: 4452840 (1984-01-01), Sato et al.

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