Energy-beam-curable thermal-releasable pressure-sensitive...

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

Reexamination Certificate

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Details

C156S275500, C156S275700, C428S040200, C428S041800, C428S042300, C428S200000, C428S202000, C428S343000, C428S345000, C428S352000, C428S3550RA, C428S3550BL

Reexamination Certificate

active

07147743

ABSTRACT:
An energy-beam-curable thermal-releasable pressure-sensitive adhesive sheet having, on at least one side of a base material, an energy-beam-curable thermo-expandable viscoelastic layer containing thermo-expandable microspheres and a pressure-sensitive adhesive layer stacked in this order. The pressure-sensitive adhesive layer has a thickness of about 0.1 to 10 μm and can be formed from a pressure-sensitive adhesive. The energy-beam-curable thermo-expandable viscoelastic layer, on the other hand, can be formed from a tacky substance. The energy-beam-curable thermal-releasable pressure-sensitive adhesive sheet according to the invention has adhesion enough to withstand a carrying step of an adherend, causes neither winding up of the adhesive nor chipping upon cutting and facilitates peeling and collection of cut pieces after cutting. In addition, it exhibits low contamination on the adherend after peeling.

REFERENCES:
patent: 4176702 (1979-12-01), Seiberling
patent: 5441810 (1995-08-01), Aizawa et al.
patent: 2004/0000370 (2004-01-01), Kiuchi
patent: 0 612 823 (1994-08-01), None
patent: 1 033 393 (2000-09-01), None
patent: 11-166164 (1999-06-01), None
patent: WO 00/18848 (2000-04-01), None

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