Suction chucking temporary fixing member

An adsorption temporary fixing material, comprising an adsorption temporary fixing sheet including a foam layer having an open-cell structure,

• wherein the adsorption temporary fixing material includes the foam layer in an entirety of the sheet or on at least one surface thereof,
• wherein a shear adhesive strength of a surface of the foam layer with a SUS304BA plate at 23° C. is 1 N/100 mm2 or more at a tensile rate of 50 mm/min,
• wherein a peel strength of the surface of the foam layer from the SUS304BA plate at 23° C. is 1 N/20 mm or less at a peel angle of 180° and a tensile rate of 300 mm/min,
• wherein a weight change ratio after the adsorption temporary fixing material has been immersed in distilled water for 1 minute and then water droplets have been wiped off the surface thereof is 50% or less,
• wherein the foam layer comprises a silicone foam layer,
• wherein the silicone foam layer is formed by thermal curing of a silicone resin composition, and
• wherein the silicone resin composition comprises at least:
• (A) 100 parts by weight of an organopolysiloxane having at least two alkenyl groups in a molecule thereof;
• (B) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms in a molecule thereof in such an amount that a number of moles of the silicon atom-bonded hydrogen atoms in the component (B) is from 0.4 mol to 20 mol with respect to 1 mol of the alkenyl groups in the component (A);
• (C) 100 parts by weight to 1,000 parts by weight of a mixture including water and an inorganic thickener;
• (D) 0.1 part by weight to 15 parts by weight of surfactants including (D-1) a nonionic surfactant having an HLB value of 3 or more and (D-2) a nonionic surfactant having an HLB value of less than 3, provided that a weight ratio of the component (D-1) to the component (D-2) is at least 1;
• (E) a hydrosilylation reaction catalyst;
• and
• (F) 0.001 part by weight to 5 parts by weight of a curing retarder.