Retroreflective sheet and article having retroreflectiveness

Details Retroreflective sheet and article having retroreflectiveness Retroreflective sheet and article having retroreflectiveness

1996-04-22

1998-02-03

Loney, Donald

Stock material or miscellaneous articles

Sheet including cover or casing

428421, 428520, 428913, 359529, B32B 104, G02B 5122

Patent

active

057142238

ABSTRACT:
A retroreflective article that comprises:
(a) a retroreflective layer having first and second major surfaces, and
(b) a cover layer juxtaposed against the first major surface, characterized in that:
the cover layer comprises a surface layer, an optional intermediate layer, and a back layer, with the provisos that: (i) when the intermediate layer is present in the cover layer the intermediate layer contains a vinylidene fluoride base polymer as a primary component, and the surface layer and back layer each comprise a methyl methacrylate base polymer as a primary component; and (ii) when the intermediate layer is absent from the cover layer, the surface layer comprises a methyl methacrylate base polymer (A) and a vinylidene fluoride base polymer (F) in a weight ratio A:F of 55:45 to 95:5, and the back layer comprises a methyl methacrylate base polymer and a vinylidene fluoride base polymer with the vinylidene fluoride base polymer being the primary component.

REFERENCES:
patent: 3190178 (1965-06-01), McKenzie
patent: 3684348 (1972-08-01), Rowland
patent: 4025159 (1977-05-01), McGrath
patent: 4348312 (1982-09-01), Tung
patent: 4444826 (1984-04-01), Sasaki et al.
patent: 4588258 (1986-05-01), Hoopman
patent: 4637950 (1987-01-01), Bergeson et al.
patent: 4653854 (1987-03-01), Miyata
patent: 4896943 (1990-01-01), Tolliver et al.
patent: 5069964 (1991-12-01), Tolliver et al.
patent: 5132164 (1992-07-01), Moriya et al.

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