Methods of making articles using structured tapes

Patent metadata

Field	Value
Publication number	US-9855730-B2
Application number	US-201514968362-A
Country	US
Kind code	B2
Filing date	Dec 14, 2015
Priority date	Dec 21, 2012
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

Methods of making articles using structured tapes are disclosed. The structured tapes may include a structured template layer having a structured surface and an opposed second surface and an uncured backfill layer, the uncured backfill layer has a lower refractive index than the structured template layer, and the uncured backfill layer has a structured surface conforming to the structured surface of the structured template layer and an opposed second surface. The structured tapes may include a structured template layer having a structured surface and an opposed second surface and an uncured backfill layer, the uncured backfill layer has a higher refractive index than the structured template layer, and the uncured backfill layer has a structured surface conforming to the structured surface of the structured template layer and an opposed second surface. The structure tapes may be laminated via the uncured backfill layer to a receptor substrate to form an article.

First claim

What is claimed is:

1. A method of making an article comprising:
providing a structured tape comprising:
a carrier;
a structured template layer having a structured surface and an opposed second surface, wherein the opposed second surface of the structured template layer is in contact with the carrier;
an uncured backfill layer, wherein the uncured backfill layer has a lower refractive index than the structured template layer, and the uncured backfill layer has a structured surface conforming to the structured surface of the structured template layer and an opposed second surface;

laminating the opposed second surface of the uncured backfill layer to a receptor substrate, without an adhesion promotion layer and wherein the uncured backfill layer is tacky, to form an article.

2. The method of making the article of claim 1 , wherein the refractive index of the uncured backfill layer is less than or equal to 1.55.

3. The method of making the article of claim 1 , wherein the uncured backfill layer comprises a polymerizable composition of monomers capable of being cured by actinic radiation.

4. The method of making the article of claim 1 , wherein the structured template layer is a permanent crosslinked polymer network.

5. The method of making the article of claim 1 , wherein the structured template layer is an extrudable polymer.

6. The method of making the article of claim 1 , further comprising exposing the article to blanket actinic radiation to cure the uncured backfill layer, thereby forming a structured, cured backfill layer having a lower refractive index than the structured template layer.

7. The method of making the article of claim 6 , further comprising removing the carrier after exposing the article to blanket actinic radiation to cure the uncured backfill layer.

Assignees

• 3M Innovative Properties Co

Inventors

• Wolk Martin B
• Free Michael Benton
• Vogel-Martin Margaret M
• Schwartz Evan L
• Mazurek Mieczyslaw H
• Collier Terry O

Classifications

• B29C35/0805 Primary

  using electromagnetic radiation · CPC title

• B29C37/0067

  Using separating agents during or after moulding; Applying separating agents on preforms or articles, e.g. to prevent sticking to each other (separating agents B29C33/60) · CPC title

• B29C2035/0827

  using UV radiation · CPC title

• G03F7/2014

  Contact or film exposure of light sensitive plates such as lithographic plates or circuit boards, e.g. in a vacuum frame · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title