Pressure-sensitive adhesive sheet

Details Pressure-sensitive adhesive sheet Pressure-sensitive adhesive sheet

1996-07-10

2000-06-13

Davis, Jenna

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428214, 428354, 428355, 428355AC, 428355BL, C09J 702

Patent

active

060747293

ABSTRACT:
A pressure-sensitive adhesive sheet 1A is for use by sticking onto a liquid crystal cell, and it has a construction wherein the pressure-sensitive adhesive layer 3 is joined to one side of the base material layer 2 which is constructed with a light-polarizing sheet and a release sheet 4 stuck onto the other side from the base material layer 2 of the pressure-sensitive adhesive layer 3. The pressure-sensitive adhesive layer 3 is constructed as a laminate with the layers 31 and 32. An acrylic-based pressure-sensitive adhesive, for example, can be used for the pressure-sensitive adhesives from which the layers 31 and 32 are constructed, but the shear elastic modulus or the relaxation elastic modulus of the layer 32 is set lower than that of the layer 31 as a result of a difference in the composition of the pressure-sensitive adhesive, the degree of crosslinking or the amount of plasticizer added in the layers 1 and 32. The stress which is produced by contraction, for example, of the base material layer is relieved and stress concentration can be reduced. In particular, white marking and color unevenness of the liquid crystal cell can be suppressed.

REFERENCES:
patent: 3032438 (1962-05-01), Gaynes
patent: 3161533 (1964-12-01), Gaynes
patent: 3812005 (1974-05-01), Katagiri
patent: 4112177 (1978-09-01), Salditt
patent: 4260659 (1981-04-01), Gobran

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