Patent ID: 11970643
Assignee: NITTO DENKO CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B  H | IPC B  C

Claim 7:
8. A suction fixing sheet to be placed on a suction surface of a suction device to prevent contact between a suction target and the suction surface, the suction fixing sheet comprising:
a porous sheet having air permeability in its thickness direction; and
an adhesive layer having air permeability in its thickness direction and disposed on one surface of the porous sheet, the adhesive layer being a single layer; wherein
the adhesive layer serves as an exposed surface when the suction fixing sheet is used,
the adhesive layer is in contact with the porous sheet,
the adhesive layer comprises a crosslinked adhesive agent, and
sucked force obtained for the suction fixing sheet when the sheet area is 100 cm2 is 450 N or more, the sucked force being a value determined as per the following equation: ultimate vacuum pressure (kPa)×sheet area 100 cm2, the ultimate vacuum pressure (kPa) being caused to occur in a predetermined suction fixing stage when suction force is generated in the suction fixing stage in the state where the suction fixing sheet is fixed to the suction fixing stage with the adhesive layer interposed therebetween and a non-air permeable measurement sheet is stacked on a surface on the porous sheet side of the suction fixing sheet,
wherein an air permeability of the suction fixing sheet in an in-plane direction is 9.0 to 11.8 (L/min).