公开(公告)号：US20210362453A1

公开(公告)日：2021-11-25

申请号：US17050023

申请日：2019-05-24

Applicant: NITTO DENKO CORPORATION

Inventor： Masahiro ARAI

IPC: B30B15/06 ,  B32B27/32 ,  B32B27/10 ,  B32B7/12 ,  B32B27/36 ,  B32B29/00 ,  B32B27/16

Abstract: The workpiece protection sheet is used between a suction table and a workpiece in a state where the workpiece protection sheet is sucked to the suction table when the workpiece is pressed on the suction table. The workpiece protection sheet includes a base layer and an ultrahigh molecular weight polyethylene porous layer, an air permeability in a thickness direction of the workpiece protection sheet measured such that the base layer side is at an upstream side of airflow during measuring is 4000 seconds/100 mL or more as represented by a Gurley air permeability measured according to Method B of air permeability measurement specified in JIS L1096, a suction surface to be sucked to the suction table is composed of the base layer, and a contact surface to be in contact with the workpiece is composed of the ultrahigh molecular weight polyethylene porous layer.

公开(公告)号：US20230158718A1

公开(公告)日：2023-05-25

申请号：US17916100

申请日：2021-03-23

Applicant: NITTO DENKO CORPORATION

Inventor： Yuuzou MURAKI ,  Masahiro ARAI ,  Kurato AKIBA ,  Toshimitsu TACHIBANA

IPC: B29C39/26 ,  C08J5/18 ,  B29C43/34 ,  B29C55/00 ,  B29C55/04

CPC classification number: B29C39/26 ,  C08J5/18 ,  B29C43/34 ,  B29C55/005 ,  B29C55/04 ,  C08J2327/18

Abstract: A heat-resistant release sheet is configured to be disposed, when a resin or a target including a resin is used in a step involving heating and melting of the resin, between the resin or the target and a member to be brought into contact with the resin or the target to prevent direct contact between the resin or the target and the member. The sheet includes a skived sheet including polytetrafluoroethylene (PTFE) or a modified PTFE. A content of a tetrafluoroethylene (TFE) unit in the modified PTFE is 99 mass % or more. In each of two directions being in-plane directions of the heat-resistant release sheet and being perpendicular to each other, a rate of dimensional shrinkage induced by heating at 175° C. for 30 minutes is more than 0%. The sheet includes the skived sheet including the heat-resistant resin but prevents occurrence of problems attributable to inclusion of the skived sheet.

公开(公告)号：US20210348033A1

公开(公告)日：2021-11-11

申请号：US17274288

申请日：2019-09-06

Applicant: NITTO DENKO CORPORATION

Inventor： Masahiro ARAI

IPC: C09J7/26 ,  B25B11/00

Abstract: The present disclosure provides 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 including: 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; wherein the adhesive layer includes a crosslinked adhesive agent, and sucked force obtained for the suction fixing sheet when the sheet area is 100 cm2, the sucked force being measured by a predetermined method, is 450 N or more. The suction fixing sheet of the present invention can suppress a decrease in processing accuracy of a suction target even when the sheet is used under high temperature conditions.

公开(公告)号：US20200277518A1

公开(公告)日：2020-09-03

申请号：US16645691

申请日：2018-09-12

Applicant: NITTO DENKO CORPORATION

Inventor： Masahiro ARAI ,  Hiromitsu MORISHITA

IPC: C09J7/38 ,  C09J7/26 ,  C09J133/04 ,  C09J183/04

Abstract: The suction fixing sheet of the present disclosure is 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 includes a porous sheet having air permeability in its thickness direction; and a double-sided pressure-sensitive adhesive sheet provided with a substrate, having air permeability in its thickness direction, and disposed on one surface of the porous sheet, or a double-sided pressure-sensitive adhesive layer unprovided with a substrate, formed of a crosslinked pressure-sensitive adhesive, having air permeability in its thickness direction, and disposed on one surface of the porous sheet. The ratio of the thickness of the porous sheet to the thickness of the double-sided pressure-sensitive adhesive sheet or the double-sided pressure-sensitive adhesive layer is 8.0 or more.