公开(公告)号：US20210208320A1

公开(公告)日：2021-07-08

申请号：US16755843

申请日：2018-10-03

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Gregg A. Ambur ,  Benjamin G. Sonnek ,  Jo A. Etter ,  Timothy L. Wong ,  Thomas P. Klun ,  Richard J. Pokomy ,  Benjamin R. Coonce ,  Douglas S. Dunn ,  Henry A. Kostalik ,  Christopher S. Degraw ,  John R. Jacobson ,  Chunjie Zhang

IPC: G02B5/30 ,  B29D11/00 ,  G02B5/28

Abstract: An optical assembly including an optical element insert molded directly onto an optical stack is provided. The optical stack includes an optical film and may include a liner with the optical film being disposed between the optical element and the liner. The liner, if included, is removable from the optical film without substantial damage to the optical film. An outermost layer of the optical film may be diffusion bonded to a major surface of the optical element.

公开(公告)号：US20230364851A1

公开(公告)日：2023-11-16

申请号：US18246064

申请日：2021-10-26

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Anthony F. Schultz ,  Ta-Hua Yu ,  Duane D. Fansler ,  Karl J.L. Geisler ,  Bruce R. Broyles ,  Bhaskar V. Velamakanni ,  THomas J. Metzler ,  Jonathan E. Janoski ,  Richard J. Pokomy ,  Mark T. Gibson ,  Ahmed S. Abuelyaman

IPC: B29C51/14

CPC classification number: B29C51/14 ,  B29K2033/12

Abstract: A method of thermoforming is described. The method comprises providing a multilayer polymer film comprising at least one first thermoplastic polymer layer having a glass transition temperature (Tg) greater than 60° C. and at least one second polymer layer; and thermoforming the multilayer polymer film into a three-dimensional shape. The second polymer layer can be characterized by one or more properties selected from i) a Tg ranging from 20 to 70° C.; ii) a molecular weight between crosslinks of no greater than 20,000 g/mole; and iii) sufficient crosslinking such that the second polymer layer lacks a thermal melt or softening transition at a temperature up to the decomposition temperature of the second polymer layer. Also described are multilayer films and articles, such as orthodontic aligner and retainer trays.