Dic Corporation

Sun Chemical Corporation

Dic Corporation (Tokyo)

Akira Yamakami

Daisuke Watanabe

Kota Suetsugu

Philippe Schottland

Takeshi Iwasaki

Hideaki Takei

Bo Sun

Jerome Moyer

Takamine Sugiura

Yumi Kagiyama

Katsuaki Imai

Yuki Ogawa

Nana Shiraishi

Yumi Kamikawa

An adhesive tape has adhesive strength with high high-load holding power, temporal repeelability, and storage stability. The adhesive tape includes a substrate layer and an adhesive layer. The substrate layer has a breaking stress in a range of 1 to 100 MPa and an elongation at break in a range of 300% to 3000%. The adhesive layer contains a tackifier resin and a triblock copolymer with a repeating unit represented by the general formula (1): A, B, and C independently denote a repeating unit. A and C independently denote an alkyl methacrylate monomer unit and B denotes an alkyl acrylate monomer unit. p, q, and r independently denote the degree of polymerization of their respective monomer units. A and C may be the same or may denote an alkyl methacrylate monomer unit with a different chemical structure. * denotes a bonding arm to another atom.

Pressure-sensitive adhesive tape

An adhesive tape with high high-load holding power, initial adhesive strength, and repeelability is provided. An adhesive layer of the adhesive tape contains filler particles and a triblock copolymer with a repeating unit represented by the following general formula (1): A, B, and C independently denote a repeating unit. A and C independently denote an alkyl methacrylate monomer unit and B denotes an alkyl acrylate monomer unit. p, q, and r independently denote the degree of polymerization of their monomer units respectively. A and C may be the same or may denote an alkyl methacrylate monomer unit with a different chemical structure, and * denotes a bonding arm to another atom. A relationship D50/T between an average particle size D50 of the filler particles and an average thickness T of the adhesive layer ranges from 0.05 to 1.0.

A black sheet () includes a laminate of a base sheet () and an infrared reflecting layer (). The CIE color values (L*, a*, b*) and the infrared reflectance R/[%] at a wavelength of 850 nm are within the following respective ranges. 18&#x2264;L*&#x2264;36, &#x2212;3&#x2264;a*&#x2264;3, &#x2212;3&#x2264;b*&#x2264;3, 12&#x2264;R

Black sheet and black adhesive tape

The invention relates to a method for peeling a pressure-sensitive adhesive tape including: a pressure-sensitive adhesive layer. The pressure-sensitive adhesive tape has a thickness greater than 150 &#x3bc;m and smaller than 1,500 &#x3bc;m, an elongation at break of 600% to 3,000%, and a stress at break of 2.5 to 80.0 MPa. According to the invention, the conformity and the adhesion with respect to an adherend, particularly, a hard adherend, are excellent, and excellent re-peeling properties are obtained, so that the pressure-sensitive adhesive tape can be stretched and peeled off in a horizontal direction, without necessity for embrittling the pressure-sensitive adhesive tape by heating or by using an organic solvent or the like or without remaining of the pressure-sensitive adhesive on the adherend, in a case of peeling the pressure-sensitive adhesive tape.

Double-sided pressure-sensitive adhesive tape

There is provided a double-sided adhesive tape includes a foam base, a resin film disposed on a surface of the foam base, an adhesive layer disposed on a surface of the resin film, and an adhesive layer disposed on another surface of the foam base. The foam base has a density of 0.45 g/cmor less and an interlaminar strength of 10 N/cm or more. The adhesive layer has a 180&#xb0;-peel adhesion of 10 N/20 mm or more. The 180&#xb0;-peel adhesion is measured at a peeling speed of 300 mm/min when an adhesive tape including a 25-&#x3bc;m-thick PET base and a 25-&#x3bc;m-thick adhesive layer disposed on the PET base is bonded to an aluminium board at 23&#xb0; C. and 65% RH by pressing the adhesive tape against the aluminium board with one stroke of a 2-kg roller and subsequently the adhesive tape is left standing for 1 hour at 23&#xb0; C. and 50% RH.

Double-sided adhesive tape

Growing community of inventors

Kita-adachi-gun, Japan

Akira Yamakami