Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1990-04-05
1991-12-31
Ryan, Patrick J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
428136, 428149, 428172, 428325, 428354, 4284231, 428413, 4284744, 428480, 428913, 404 14, G02B 512, E01F 904, B32B 516
Patent
active
050771175
ABSTRACT:
A pavement marking material comprises a flexible base sheet that is conformable to an irregular pavement surface. A durable, wear-resistant, polymeric top layer is adhered to one surface of the base sheet. The top layer is capable of undergoing brittle fracture at a temperature from 0.degree. C. to 45.degree. C. such that when the base sheet conforms an irregular surface, the top layer readily forms ruptures to relieve stress build-up in the top layer as the regions of the top layer defined by the ruptures remain adhered to, and follow the conformance of, the base sheet. A plurality of particles are embedded in and protrude from the top layer. The particles comprise retroreflective beads and skid-resistant granules. In a preferred embodiment, the top layer is characterized by a Young's modulus of from about 50,000 psi to about 300,000 psi, and a percent elongation at break of from about 4% to about 35%.
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Grunzinger, Jr. Raymond E.
Harper James H. C.
Griswold Gary L.
Kagan David B.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Ryan Patrick J.
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