公开(公告)号：US20200002109A1

公开(公告)日：2020-01-02

申请号：US16367254

申请日：2019-03-28

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： MASASHI HAMAKUBO ,  TOSHIYUKI HIRAI ,  YOSHIHIRO YAMADA

IPC: B65H3/06 ,  C08K3/36 ,  C08L23/16 ,  C08K3/013 ,  B65H3/52

Abstract: Provided are a rubber composition capable of imparting a high tensile strength to a roller main body so as to be able to be used for equipment that allows paper to pass through at high speed, while maintaining high abrasion resistance of the roller main body and a favorable paper feeding performance of the paper feeding roller; and a paper feeding roller. There is provided a rubber composition contains: a rubber that includes a non-oil extended EPDM having an ethylene content of 55 to 72%; and more than 20 parts by mass and 30 parts by mass or less of a filler, and 2.5 parts by mass or more of a peroxide crosslinking agent per 100 parts by mass of the rubber, in which the filler contains 15 to 30 parts by mass of an amorphous silica per 100 parts by mass of the rubber.

公开(公告)号：US20230192432A1

公开(公告)日：2023-06-22

申请号：US17866556

申请日：2022-07-18

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： MASASHI HAMAKUBO ,  RYOSUKE FUJII ,  SATOSHI ITO

IPC: B65H27/00

CPC classification number: B65H27/00 ,  B65H2404/19

Abstract: A sheet transport roller having a high friction coefficient and a rubber composition for forming a roller main body thereof. The rubber composition of the present disclosure, which is a rubber composition for forming the roller main body of the sheet transport roller, contains a rubber component containing an ethylene-α-olefin copolymer and a rosin component.

公开(公告)号：US20230193008A1

公开(公告)日：2023-06-22

申请号：US17888492

申请日：2022-08-16

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： RYOSUKE FUJII ,  MASASHI HAMAKUBO

IPC: C08L23/16 ,  C08J3/00 ,  C08J3/24 ,  B65H27/00

CPC classification number: C08L23/16 ,  B65H27/00 ,  C08J3/005 ,  C08J3/247 ,  B65H2404/10 ,  C08J2323/16 ,  C08J2445/02 ,  C08L2312/00

Abstract: A rubber composition capable of manufacturing a sheet transport roller having an excellent friction coefficient and wear resistance. A sheet transport roller rubber composition contains an ethylene-α-olefin-diene copolymer as a base rubber, a sulfur-based crosslinking agent, and a coumarone-indene resin. It is preferable that the sheet transport roller rubber composition be obtained by mixing the base rubber and the coumarone-indene resin at a temperature equal to or higher than a softening point of the coumarone-indene resin to prepare a mixture, and then mixing this mixture with a sulfur-based crosslinking agent.

公开(公告)号：US20200002519A1

公开(公告)日：2020-01-02

申请号：US16365686

申请日：2019-03-27

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： MASASHI HAMAKUBO ,  HIROFUMI KONISHI ,  YUDAI OKUNO

IPC: C08L23/16 ,  B65H3/06

Abstract: Provided are a rubber composition which is a base of a roller main body and capable of imparting favorable flexibility to the roller main body while maintaining high abrasion resistance to form, for example, a paper feeding roller that has a favorable paper feeding performance and can be used as a paper supply roller or the like; and a paper feeding roller in which the roller main body is formed using the rubber composition. There is provided a rubber composition contains a rubber that includes 20 to 80 parts by mass of a non-oil extended EPDM having an ethylene content of 55% to 72%, and an oil extended EPDM; and 20 parts by mass or less of a filler and 2.5 parts by mass or more of a peroxide crosslinking agent per 100 parts by mass of the rubber.

公开(公告)号：US20190016875A1

公开(公告)日：2019-01-17

申请号：US15990835

申请日：2018-05-29

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： YUDAI OKUNO ,  MASASHI HAMAKUBO ,  AKIHIRO MINE ,  TOSHIYUKI HIRAI ,  YOSHIHIRO YAMADA

IPC: C08L9/00 ,  B41J13/076 ,  B65H5/06

CPC classification number: C08L9/00 ,  B41J13/076 ,  B65H5/06 ,  B65H2401/111 ,  B65H2404/19 ,  B65H2515/716 ,  C08K3/017 ,  C08L23/16 ,  C08L2201/04 ,  C08L2205/025 ,  C08L2205/03 ,  C08L91/00

Abstract: There is provided a rubber composition in which an antistatic agent is uniformly dispersed and the rubber composition has antistatic ability, coefficient of friction, and wear resistance. A rubber composition includes 7 parts by mass or more of a polyether/polyolefin block copolymer resin with respect to 100 parts by mass of a rubber component, and the total amount or a part of a rubber component is mixed with a polyether/polyolefin block copolymer resin at a temperature that is equal to or higher than a melting point of the polyether/polyolefin block copolymer resin.