1918results about "Film/foil adhesive release liners" patented technology

The present invention provides a double-sided pressure-sensitive adhesive tape having a thin overall thickness, having a foam layer, and excellent removability. The double-sided adhesive tape of the present invention is characterized in that it has a total thickness of 500 μm or less, has a foam layer, a reinforcing layer, and an adhesive layer as two surface layers, and the adhesive layer of at least one surface layer is composed of An adhesive composition formed of an acrylic polymer, a tackifying resin and a crosslinking agent, the acrylic polymer is formed of a (meth)acrylic acid alkyl group having a straight chain or branched chain alkyl group with 4 to 9 carbon atoms Esters are constituted as essential monomer components.

An exemplary moisture barrier membrane 10 comprises a waterproof adhesive layer, (14) a carrier support, (12) and a release liner (16) composite having a paper sheet, (20) cutting strings, (22) a polyolefin (24) coating or film for holding the strings against the paper and apart from the waterproof adhesive layer, and a release agent (26) such as silicone or wax over the polyolefin coating or film. This construction allows for relatively thin paper and strings to be used, such that tear resistance is conferred upon the release liner composite as a whole.

The invention provides an optical-use adhesive sheet excellent in adhesiveness under bending, twisting or distorting stress. The optical-use adhesive sheet has an adhesive layer having a storage elastic modulus at 80 DEG C of at least 2.0X10 4 Pa and a loss elastic modulus at 80 DEG C of at least 1.0X10 4 Pa, the optical-use adhesive sheet is characterized in that the adhesive sheet has a peel force, as measured in the L-shape peel test, of at least 0.16 MPa, and has a peel distance, as measured in the constant-load peel test, of at most 50 mm. In the L-shape peel test, an L-shaped stainless steel clamp is adhered with an acrylicresin plate through the adhesive sheet, the acrylicresin plate and the stainless steel clamp are processed for 15 minutes at 50 DEG C under 5 atm, and then, the stainless steel clamp is drawn along a direction vertical to a surface of the acrylicresin plate so as to test the peel force. In the constant-load peel test, a double-faced adhesive sheet is adhered on the acrylicresin plate, then, the acrylicresin plate and the double-faced adhesive sheet are processed for 10 minutes at 50 DEG C under 5 atm, and then, a load of 100gf is applied along the direction vertical to the surface of the acrylicresin plate on a tail end in a length direction of the adhesive sheet so as to test the peel distance of the adhesive sheet after 3 hours.

A process includes (i) the steps of adhering a pressure-sensitive adhesive layer supported on a base material to a release layer containing a mixture of a polyethylene and an ethylene / alpha-olefin copolymer and aging the resultant structure at 40 to 75° C. for 6 hours or more or (ii) the steps of adhering a pressure-sensitive adhesive layer supported on a base material to a release layer containing a linear ethylene-based resin in which the content of components eluted at 30° C. or lower measured by the temperature rising elution fractionation method is 3 to 30 wt % and aging the resultant structure at 55 to 75° C. for 6 hours or more, to thereby regulate the pressure-sensitive adhesive layer so as to have a peel force of 0.5 to 5 N / 50 mm when peeled from the release layer at an angle of 180° and a rate of 2 m / min together with the support base material.