C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 133/08 (2006.01) C09J 7/02 (2006.01) C09J 133/06 (2006.01) G02B 5/12 (2006.01) G02B 5/124 (2006.01) C08L 33/06 (2006.01) C08L 61/00 (2006.01)
Patent
CA 2206298
A retroreflective sheet comprises a film having a substantially flat surface and a large number of pyramidal projections having retroreflectivity on the opposite surface, and a colored layer and an adhesive layer disposed on the surface of the film having the projections. The adhesive layer comprises a heat-sensitive adhesive containing an acrylic polymer and a phenolic resin, and exhibits an elastic modulus (by dynamic viscoelasticity measurement, compression mode) at 30 ~C ranging from about 1 x 106 to 1 x 108 dyn/cm2.
Cette invention concerne des feuilles rétroréfléchissantes se composant d'un film ayant une surface sensiblement plate, et une autre face comportant un grand nombre de saillies pyramidales rétroréfléchissantes. Ces feuilles comportent également une couche colorée ainsi qu'une couche adhésive disposées sur la surface du film comportant les projections. La couche adhésive se compose d'un adhésif thermosensible, lequel contient un polymère acrylique et une résine phénolique, et présente un module élastique (par mesure de viscoélasticité dynamique, mode de compression) qui varie, à une température de 30 ~C, entre 1 x 10?6¿ et 1 x 10?8¿ dyn/cm?2¿.
Smart & Biggar
The Minnesota Mining & Manufacturing Company
LandOfFree
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