US 12,214,575 B2
Member supplying sheet
Hiroki Kigami, Osaka (JP)
Assigned to NITTO DENKO CORPORATION, Osaka (JP)
Appl. No. 17/790,851
Filed by NITTO DENKO CORPORATION, Osaka (JP)
PCT Filed Jan. 8, 2021, PCT No. PCT/JP2021/000562
§ 371(c)(1), (2) Date Jul. 5, 2022,
PCT Pub. No. WO2021/141124, PCT Pub. Date Jul. 15, 2021.
Claims priority of application No. 2020-002006 (JP), filed on Jan. 9, 2020.
Prior Publication US 2023/0045951 A1, Feb. 16, 2023
Int. Cl. B32B 27/32 (2006.01); B32B 3/08 (2006.01); B32B 7/12 (2006.01); B32B 27/30 (2006.01)
CPC B32B 27/322 (2013.01) [B32B 3/085 (2013.01); B32B 7/12 (2013.01); B32B 27/30 (2013.01); B32B 2307/54 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A member supplying sheet, the member supplying sheet being for protective cover member supply and comprising:
one or more protective cover members each configured to be placed on a face of an object to prevent a foreign matter from entering an opening of the face; and
a substrate sheet having a surface where the one or more protective cover members are placed, wherein
the protective cover member comprises a laminate including: a protective membrane having a shape configured to cover the opening when the protective cover member is placed on the face; and an adhesive layer,
wherein the protective membrane has gas permeability in a thickness direction of the protective membrane, the gas permeability being 100 sec/100 mL or less as expressed in terms of a Gurley air permeability obtained according to a Gurley Method B of gas permeability measurement specified in JIS L 1096,
the protective membrane includes a stretched porous polytetrafluoroethylene membrane, and wherein, in a direction in which the protective membrane and adhesive layer are stacked, opposing side edges of the adhesive layer are aligned with opposing side edges of the protective membrane,
the protective cover member is placed on the surface of the substrate sheet via the adhesive layer, and
the substrate sheet has the following property A and property B:
A: a tensile stress at 10% stretching in a tensile test is 15 N/5 mm or less in at least one in-plane direction; and
B: a peel force of the surface is 0.4 N/50 mm or less, the peel force being evaluated by a peel test in which the substrate sheet adhered to an adhesive tape via the surface is peeled off at 180° with respect to the adhesive tape.