Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1996-04-10
1999-03-16
Chen, Vivian
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
428172, 428187, 428206, 428209, 428210, 4284231, 4284242, 4284244, 4284248, 4284256, 428502, 428913, 4289133, 428914, 4271634, 427180, 427202, 427203, 359529, 359534, 359535, 359536, 359538, 359540, 359541, B32B 516, B32B 1508, B32B 2740, G02B 5128
Patent
active
058827714
ABSTRACT:
The present invention provides a retroreflective sheeting including: optical elements arranged in substantially a monolayer; a spacing layer in which the optical elements are at least partially embedded; a specularly reflecting layer underlying the spacing layer; and a bead bond layer in which the optical elements are at least partially embedded. The bead bond layer includes an aminoplast-crosslinked polymer comprising urethane groups, wherein prior to crosslinking the polymer has a glass transition temperature (Tg) of less than about 0.degree. C.
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Klein Deana A.
Spawn Carol-Lynn
Chen Vivian
Cleveland David R.
Hanson Karl G.
Minnesota Mining and Manufacturing Company
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