Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1989-10-12
1992-02-11
Robinson, Ellis P.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
428192, 428194, 428195, 428207, 428213, 428215, 428210, 428220, 428437, 428906, 2641771, B32B 300
Patent
active
050875027
ABSTRACT:
A process for forming intermediate sheeting for forming shaped interlayer blanks comprising extruding plasticized polyvinyl butyral melt into an endless straight-sided sheet having a gradient color band extending along one side, the melt forming the region of the sheet laterally of the color band extruding at a greater thickness than that forming the portion containing the color band, thereby providing a wedge-shaped thickness profile in the sheet, quenching the extruded sheet to set the polymer and winding the sheet in roll form. The intermediate sheet is at least about twenty inches wide and the wedge-shaped cross section gradually increases from about 28 to 32 mils at one edge to about 33 to 40 mils at the other edge.
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Bourcier David P.
Esposito Robert A.
Farrington William J.
Loney Donald J.
Monsanto Company
Murphy Michael J.
Robinson Ellis P.
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