Nitto-denko Corporation

Masato Fujita

Takahiro Nonaka

Masahito Niwa

Kaori Miki

Hiroaki Kishioka

Hirofumi Katami

Tomohide Banba

Shou Takarada

The present invention provides an excellent optical pressure-sensitive adhesive sheet having an excellent adhesion property to an optical member. The present invention relates to an optical pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer, wherein a relative dielectric constant at a frequency of 1 MHz is 5 to 10, and an adhesion strength to a glass, which is measured with a peel angle of 180&#xb0; and a tensile speed of 300 mm/min after 30 min of laminating the optical pressure-sensitive adhesive sheet to the glass, is 3 N/20 mm to 15 N/20 mm.

Optical pressure-sensitive adhesive sheet, liquid crystal display and input device comprising the same

Disclosed is a method for detaching two plates bonded through a double-coated pressure-sensitive adhesive sheet without substantially applying such a force (load) to the plates as to cause large distortion (deformation) leading to fracture or breakage of the plates. The method detaches two plates bonded through a double-coated pressure-sensitive adhesive sheet by applying a force to at least one of the two plates at least in a direction normal to the plate at such a temperature that the double-coated pressure-sensitive adhesive sheet has a storage elastic modulus of 1.0&#xd7;10Pa or more as measured by dynamic viscoelastic measurement.

Method of detaching plates

A method of producing a flat panel display including step 1-step 4, or step 1-step 5, where at least one of the optical elements after step 4 or step 5 can be reused as an optical element in step 1:

Production method of flat panel display

Growing community of inventors

Ibaraki, Japan

Masato Fujita