公开(公告)号：US20220080556A1

公开(公告)日：2022-03-17

申请号：US17416784

申请日：2019-12-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Michihiro Yamahara ,  Naohiro Nagafuchi ,  Mayumi Yoshikawa ,  Masashi Nakayama ,  Shoichi Masuda

IPC: B24D13/04 ,  B24D18/00

Abstract: Object: To provide a grinding wheel and a method of manufacturing a grinding wheel having added value while providing a suppressed manufacturing cost. Solution Means: The grinding wheel is a grinding wheel including an abrasive portion including nonwoven fabric, wherein the abrasive portion includes an outer peripheral portion formed with the nonwoven fabric including abrasive grains on an outer peripheral side, and an inner peripheral portion formed with the nonwoven fabric not including the abrasive grains, and a ratio of a thickness in a radial direction of the outer peripheral portion to a thickness in a radial direction of the abrasive portion is from 3% to 60%.

公开(公告)号：US20200306933A1

公开(公告)日：2020-10-01

申请号：US16954633

申请日：2019-01-02

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Yoko Nakamura ,  Yoshihiko Tasaka ,  Naohiro Nagafuchi

IPC: B24D11/02 ,  B24D3/00

Abstract: Object: To provide a polishing sheet capable of efficiently polishing a hard material such as a metal product so as to form a smooth surface with minimal unevenness. Solution: A polishing sheet (10) including: a substrate (11); a plurality of three-dimensional elements (12) containing abrasive grains and a binding material; and an intermediate layer (13) provided between the three-dimensional elements (12) and the substrate (11) so as to join the substrate (11) and the three-dimensional elements (12), wherein a Youngs modulus of the substrate (11) at 25° C. is not less than 3.0×109Pa; and a Youngs modulus of the intermediate layer (13) at 25° C. is not less than 1.0×107Pa and not greater than 5.0×108Pa.

公开(公告)号：US20180043507A1

公开(公告)日：2018-02-15

申请号：US15557601

申请日：2016-03-25

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Tsukio Sato ,  Naohiro Nagafuchi ,  Shinji Matsumoto

IPC: B24D7/02 ,  B24D18/00 ,  B24D7/16

Abstract: A grinding disc includes an inner layer (20) which is made of grindable material (containing abrasive particles) and an outer layer (20) which covers at least a portion of the surface of the inner layer (50) and which is made of non-grindable material (i.e. not-containing abrasive grain).