公开(公告)号：US11543572B2

公开(公告)日：2023-01-03

申请号：US16652626

申请日：2018-09-28

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Robert M. Jennings ,  Gregg A. Ambur ,  Jo A. Etter ,  Benjamin G. Sonnek ,  Zhisheng Yun

IPC: G02B5/30 ,  G02B6/27 ,  B32B7/035 ,  G02B27/14 ,  G02B6/293 ,  G02B17/08 ,  G02B27/01

Abstract: Shaped optical films and methods of shaping optical films are described. The method includes securing at least portions of a perimeter of the optical film in a first plane so that the secured portions do not move relative to one another; and stretching the optical film by displacing a portion of the optical film along at least a first direction perpendicular to the first plane such that one of a radial and circumferential stretching of the optical film is substantially constant from a center to the perimeter of the optical film, and the other one of the radial and circumferential stretching of the optical film substantially changes from the center to the perimeter of the optical film. The optical film is a reflective polarizer including a plurality of alternating polymeric layers.

公开(公告)号：US20220395962A1

公开(公告)日：2022-12-15

申请号：US17774700

申请日：2020-10-29

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Bruce A. Sventek ,  David G. Baird ,  Stephen C. Loper ,  Samad Javid ,  Jason D. McNulty ,  Benjamin G. Sonnek

IPC: B24D5/02

Abstract: The disclosure is generally directed to a method of manufacturing an abrasive rotary tool using a molded elastic layer. A mold includes a cavity with a peripheral surface. An abrasive sheet is positioned so that a working surface of the abrasive sheet is positioned along at least a portion of the peripheral surface. A spindle is positioned within the mold to create a region between the spindle and the abrasive sheet. An elastomeric precursor material is injected into the region and solidified to form an elastic layer. As a result, the elastic layer is in direct contact with at least a portion of the opposed surface of the abrasive sheet and at least a portion of the exterior surface of the spindle. In this way, an abrasive rotary tool may be manufactured without using adhesive layers and/or fastening means.

公开(公告)号：US20220146803A1

公开(公告)日：2022-05-12

申请号：US17583598

申请日：2022-01-25

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jo A. Etter ,  Timothy L. Wong ,  Zhisheng Yun ,  Gregg A. Ambur ,  Benjamin G. Sonnek ,  Robert M. Jennings

IPC: G02B17/08 ,  G02B5/30 ,  G02B27/28

Abstract: A method of fabricating an optical assembly includes providing a first mold having a first curved mold surface; placing a substantially flat reflective polarizer; on the first curved mold surface and applying at least one of pressure and heat to at least partially conform the reflective polarizer to the first curved mold surface; providing a second mold comprising a second mold surface, the first and second mold surfaces defining a mold cavity therebetween; substantially filling the mold cavity with a flowable material having a temperature greater than a glass transition temperature of the reflective polarizer; and solidifying the flowable material to form a solid optical element bonded to the reflective polarizer. A maximum variation of an orientation of a pass polarization state across the bonded reflective polarizer is within about 3 degrees of a maximum variation of the orientation of the pass polarization state across the substantially flat reflective polarizer.

公开(公告)号：US11262565B2

公开(公告)日：2022-03-01

申请号：US16495356

申请日：2018-05-14

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jo A. Etter ,  Timothy L. Wong ,  Zhisheng Yun ,  Gregg A. Ambur ,  Benjamin G. Sonnek ,  Robert M. Jennings

IPC: G02B17/08 ,  G02B5/30 ,  G02B27/28

Abstract: Optical systems for displaying an image are described. The optical systems include spaced apart first and second optical lenses. A partial reflector is disposed on and conforms to a major surface of the first optical lens where the major surface can have a best-fit spherical radius of curvature in a range from 20 mm to 200 mm. A reflective polarizer is disposed on and conforms to a major surface of the second optical lens where the major surface can have a best-fit spherical radius of curvature in a range from 14 mm to 250 mm. A retarder layer is disposed between the reflective polarizer and the partial reflector. The first optical lens can have an optical birefringence of less than 15 nm/cm and the second optical lens can have an optical birefringence of greater than 15 nm/cm. A method of fabricating an optical assembly is described.

公开(公告)号：US10442967B2

公开(公告)日：2019-10-15

申请号：US15748267

申请日：2016-08-12

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Christopher B. Walker, Jr. ,  Abdullahi A. Mohamud ,  Mary M. Caruso Dailey ,  Benjamin G. Sonnek

IPC: B32B3/00 ,  C09J175/04 ,  B32B7/00 ,  B32B7/02 ,  B32B7/04 ,  B32B9/00 ,  B32B9/04 ,  B32B15/00 ,  B32B15/04 ,  B32B15/08 ,  B32B15/095 ,  B32B27/00 ,  B32B27/06 ,  B32B27/08 ,  B32B27/16 ,  B32B27/18 ,  B32B27/26 ,  B32B27/28 ,  B32B27/30 ,  B32B27/40 ,  B32B3/02 ,  B32B3/08 ,  B32B3/10 ,  B32B3/14 ,  B29C51/00 ,  B29C71/04 ,  C09J175/14 ,  B29K75/00 ,  B29K105/16

Abstract: There is provided an article having at least a first surface having: a binder resin layer comprising an actinic radiation reactive polyurethane dispersion, where the binder resin layer has a first major surface opposite a second major surface; and a plurality of microspheres partially embedded and adhered to the first major surface of the binder resin layer. There is also provided a thermoset article derived from such thermoformable articles.