Method for applying a threadlike adhesive body, and temporary-support-supported threadlike adhesive body

A temporary-support-supported threadlike adhesive body for use in applying a threadlike adhesive body to an adherend so that the applied threadlike adhesive body has a desired shape,

• wherein
• the temporary-support-supported threadlike adhesive body comprises:
• a temporary support having a first surface and a second surface opposite the first surface, wherein the first surface is embossed;
• and
• a threadlike adhesive body applied to the first surface in a shape reverse to the desired shape, wherein the threadlike adhesive body was applied to the temporary support after heating the temporary support to a temperature in a range of 40-80° C.;
• and
• the first surface of the temporary support to which the threadlike adhesive body is applied has a peel adhesive force measured by a peel test of 0.30 N/50 mm or higher, the peel test comprising:
• introducing 40 parts by weight of ion-exchanged water into a reaction vessel equipped with a cooling tube, a nitrogen introduction tube, a thermometer, and a stirrer and stirring for at least 1 hour at 60° C. while nitrogen gas is being introduced;
• introducing 0.1 part by weight of 2,2′-azobis [N-(2-carboxyethyl)-2-methylpropionamidine] n-hydrate into the reaction vessel;
• obtaining a monomer emulsion obtained by adding 98 parts by weight of 2-ethylhexyl acrylate, 1.25 parts by weight of acrylic acid, 0.75 parts by weight of methacrylic acid, 0.05 parts by weight of lauryl mercaptan, 0.02 parts by weight of γ-methacryloxypropyltrimethoxysilane, and 2 parts by weight of polyoxyethylene sodium lauryl sulfate to 30 parts by weight of ion-exchanged water to form a mixture and emulsifying the mixture, dropwise, into the reaction vessel over 4 hours while the reaction vessel is kept at 60° C.;
• holding the reaction vessel at 60° C. for 3 hours and then cooling the reaction vessel to room temperature;
• adding 10% by weight ammonia water to the reaction vessel to adjust the pH of the contents of the reaction vessel to obtain an acrylic-polymer emulsion that is an aqueous dispersion type acrylic polymer;
• adding a tackifier-resin emulsion that is an aqueous emulsion of a polymerized-rosin ester having a softening point of 160° C. to the reaction vessel in an amount of 10 parts by weight on a solid basis per 100 parts by weight of the acrylic polymer contained in the obtained aqueous dispersion type acrylic polymer;
• regulating the contents in the reaction vessel to have a pH of 7.2 and a viscosity of 10 Pa·s by using 10% by weight ammonia water as a pH regulator and poly(acrylic acid) as a thickener to obtain an aqueous dispersion type acrylic adhesive composition;
• applying the obtained aqueous dispersion type acrylic adhesive composition to a polyethylene terephthalate (PET) substrate having dimensions of 700 mm×250 mm and a thickness of 25 μm with an applicator and drying the applied aqueous dispersion type acrylic adhesive composition at 100° C. for 2 minutes to form an adhesive layer having a thickness of 40 μm to obtain an adhesive tape for release-property evaluation;
• bonding the second surface of the temporary support opposite to the first surface facing the threadlike adhesive body to a stainless steel plate using a double-faced adhesive tape;
• cutting the adhesive tape for release-property evaluation into a size having a width of 50 mm and a length of 100 mm;
• applying and press-bonding the cut adhesive tape for release-property evaluation by rolling a 2-kg roller forward and backward once, to the first surface of the temporary support to which the threadlike adhesive body is applied;
• after sitting for 20 minutes subsequent to press-bonding the cut adhesive tape for release-property evaluation to the first surface of the temporary support to which the threadlike adhesive body is applied, the cut adhesive tape for release-property evaluation is peeled from the temporary support under the conditions of a peel angle of 180° and a peel rate of 300 mm/min to measure the peel adhesive force.