摘要:
The invention provides a transparent adhesive sheet for a flat panel display, which does not permit delamination on the adhesion surface to the glass plate even if a stress such as distortion, bending and the like is applied to the display, and does not produce bubbles in the boundary with the glass plate. The transparent adhesive sheet for a flat panel display comprised of a cured product of a composition comprising (A) a polyoxyalkylene based polymer having at least one alkenyl group in one molecule, (B) a compound having an average of not less than 2 hydrosilyl groups in one molecule, and (C) a hydrosilylation catalyst.
摘要:
The invention provides a transparent adhesive sheet for flat panel display, which shows superior level difference absorbability and does not develop bubbles in the adhesion surface to a plastic plate. The transparent adhesive sheet for flat panel display is made of a cured product of a composition comprising (A) a polyoxyalkylene based polymer having at least one alkenyl group in one molecule, (B) a compound having an average of not less than 2 and less than 5 hydrosilyl groups in one molecule, and (C) a hydrosilylation catalyst, wherein the transparent adhesive sheet has a shear storage elastic modulus (G′) of not more than 1.0×105 Pa at 25° C. and 1 Hz, and a gel fraction of not less than 40%.
摘要:
The present invention provides an optical-use pressure-sensitive adhesive sheet, which includes a pressure-sensitive adhesive layer containing a polymer formed of one or more monomer ingredients containing, as an indispensable monomer ingredient, a monomer of which homopolymer has a glass transition temperature of not lower than −10° C., said sheet having a moisture content of at least 0.65% by weight after stored in an environment at 60° C. and 95% RH for 120 hours. The pressure-sensitive adhesive layer is preferably an acrylic pressure-sensitive adhesive layer.
摘要:
The present invention provides an optical-use pressure-sensitive adhesive sheet, which includes a pressure-sensitive adhesive layer containing a polymer formed of one or more monomer ingredients containing, as an indispensable monomer ingredient, a monomer of which homopolymer has a glass transition temperature of not lower than −10° C., said sheet having a moisture content of at least 0.65% by weight after stored in an environment at 60° C. and 95% RH for 120 hours. The pressure-sensitive adhesive layer is preferably an acrylic pressure-sensitive adhesive layer.
摘要:
Provided is a pressure-sensitive adhesive sheet for optical use which less suffers from a misoperation-causing change in capacitance upon application to an optical member.The pressure-sensitive adhesive sheet for optical use includes a pressure-sensitive adhesive layer and has a dielectric constant of from 2 to 8 at a frequency of 1 MHz and a dielectric loss tangent of more than 0 and 0.2 or less at a frequency of 1 MHz. The pressure-sensitive adhesive sheet for optical use preferably has a dielectric constant at a frequency of 1.0×106 Hz being 60% or more of that at a frequency of 1.0×104 Hz. In addition, the pressure-sensitive adhesive sheet for optical use preferably has an absolute value of difference between the dielectric loss tangent at a frequency of 1.0×106 Hz and that at a frequency of 1.0×104 Hz of 0.15 or less.
摘要:
Provided is an optical pressure-sensitive adhesive sheet which excels in whitening resistance and high-temperature bonding reliability and exhibits superior bump absorptivity. The optical pressure-sensitive adhesive sheet according to the present invention includes an acrylic pressure-sensitive adhesive layer and has a moisture content of 0.65 percent by weight or more after storage in an environment of 60° C. and 95 percent relative humidity for 120 hours, in which the acrylic pressure-sensitive adhesive layer contains an acrylic polymer and has a storage shear modulus at 23° C. of from 0.8×105 to 5.0×105 Pa, and the acrylic polymer is formed from, as an essential monomer component, a monomer that will form a homopolymer having a glass transition temperature of −10° C. or higher.
摘要:
Provided is an optical pressure-sensitive adhesive sheet which excels in whitening resistance and high-temperature bonding reliability and exhibits superior bump absorptivity. The optical pressure-sensitive adhesive sheet according to the present invention includes an acrylic pressure-sensitive adhesive layer and has a moisture content of 0.65 percent by weight or more after storage in an environment of 60° C. and 95 percent relative humidity for 120 hours, in which the acrylic pressure-sensitive adhesive layer contains an acrylic polymer and has a storage shear modulus at 23° C. of from 0.8×105 to 5.0×105 Pa, and the acrylic polymer is formed from, as an essential monomer component, a monomer that will form a homopolymer having a glass transition temperature of −10° C. or higher.
摘要:
The present invention provides an optical pressure-sensitive adhesive sheet in which white turbidity is not caused by humidification and durability is excellent as well. The present invention provides an optical pressure-sensitive adhesive sheet, comprising: a pressure-sensitive adhesive layer in which a moisture ratio after storage under an environment of 60° C. and 95% RH for 120 hours is 0.65 wt % or more, and a shear storage elastic modulus at 85° C. which is measured by a dynamic viscoelastic measurement is 5.0×104 to 5.0×105 Pa, wherein a peeling distance measured by the constant-load peel test is 30 mm or less when an adherend is a polyethylene terephthalate plate, and the peeling distance measured by the following constant-load peel test is 30 mm or less when the adherend is an acrylic plate.
摘要:
Provided is an optical pressure-sensitive adhesive sheet having satisfactory colorlessness/transparency, excels in whitening resistance, high-temperature bonding reliability, bump absorptivity, and in workability. The sheet includes a plastic film substrate and, on at least one side thereof, an acrylic pressure-sensitive adhesive layer and has a moisture content of 0.65 percent by weight or more after storage in an environment of 60° C. and 95% RH for 120 hours. The plastic film substrate has a total light transmittance of 88% or more, an internal haze of 1.5% or less, a b* value of −0.5 to 0.5, and a thickness of 12 to 75 μm, the acrylic pressure-sensitive adhesive layer contains an acrylic polymer and has a storage shear modulus at 23° C. of 0.8×105 to 5.0×105 Pa, and the acrylic polymer is formed from, as an essential monomer component, a monomer forming a homopolymer with a glass transition temperature of −10° C. or higher.