公开(公告)号：US20230273119A1

公开(公告)日：2023-08-31

申请号：US18111056

申请日：2023-02-17

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Bharat R. Acharya ,  Raj Rajagopal ,  Gregory W. Sitton ,  Benjamin G. Sonnek ,  Robert M. Biegler ,  Gilles J. Benoit ,  Timothy J. Lindquist ,  John A. Wheatley ,  Kristal L. Schutta ,  James A. Phipps

IPC: G01N21/31

CPC classification number: G01N21/314 ,  G01N2021/317 ,  G01N2201/0453

Abstract: An optical well is configured to receive a test sample for examining an optical characteristic of the sample at a first wavelength in a predetermined wavelength range. The optical well includes a wall having a bottom wall portion and a sidewall portion defining a chamber for receiving the test sample, and an optical film formed into a shape so that a portion of the sidewall portion includes a first portion of the optical film, and a portion of the bottom wall portion includes a second portion of the optical film. For a normally incident light, the microlayers in each of the first and second portions have an average optical reflectance of greater than about 80% in the predetermined wavelength range. The forming results in the plurality of microlayers of the integral formed optical film having a thinnest portion and a thickest portion having a thickness difference of at least 30%.

公开(公告)号：US20210394427A1

公开(公告)日：2021-12-23

申请号：US17260646

申请日：2019-07-15

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Sara Hemmer Frisco ,  Guy M. Kallman ,  Kristal L. Schutta ,  Thomas B. Stirling

IPC: B29C51/14 ,  B29C51/10 ,  B32B27/08 ,  B32B27/36 ,  B32B27/30

Abstract: A method of thermoforming a rigid film construction. The method comprises: applying a rigid film construction to a mold; and heating the rigid film construction until it conforms to the mold. The rigid film construction includes a rigid polymeric film layer; a light-modifying film layer; and a shielding film layer. The shielding film comprises polymethyl methacrylate (PMMA); and the shielding film layer contacts the surface of the mold.

公开(公告)号：US20230390991A1

公开(公告)日：2023-12-07

申请号：US18248927

申请日：2021-12-07

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Raymond P. Johnston ,  Jodi L. Connell ,  Karl J.L. Geisler ,  Jeffrey L. Solomon ,  Kristal L. Schutta ,  Conrad Lather ,  Ta-Hua Yu ,  Anthony F. Schultz ,  Duane D. Fansler ,  Richard J. Pokorny

IPC: B29C51/14 ,  B29C51/00

CPC classification number: B29C51/14 ,  B29C51/002 ,  B29K2033/12

Abstract: Presently described are methods of making an article comprising providing a structured film (1100) comprising a thermoformable planar base (212) layer and a structured surface (116, 216) layer disposed on a major surface (1200) of the planar base (212) layer wherein the structured surface (116, 216) layer comprises a different organic polymeric material than the thermoformable planar base (212) layer, and thermoforming the structured film (1100) into a thermoformed article (1000). Also described are thermoformed and thermoformable articles.