IP Library › Granted Patent US 12668041
Granted Patent B2
US 12668041 · App. 18/152,807 · Granted Jun 30, 2026

Protective display film with glass

Inventors: Joseph W. Woody, V (Woodbury, MN); David Scott Thompson (Bayport, MN); Catherine A. Leatherdale (Woodbury, MN); Ryan M. Braun (St. Paul, MN); Michael A. Johnson (Stillwater, MN); Steven D. Solomonson (Shoreview, MN); John J. Stradinger (Roseville, MN); Lyudmila A. Pekurovsky (Bloomington, MN); Joseph D. Rule (Woodbury, MN); Peter D. Condo (Lake Elmo, MN)
Assignee: 3M Innovative Properties Company
B32B17/06B32B7/12B32B27/308B32B27/40H10K59/873H10K77/111B32B2307/56B32B2315/08B32B2333/04B32B2375/00B32B2457/206H10K2102/311
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Quick Facts
Patent No.
US 12668041
App. No.
18/152,807
Granted
Jun 30, 2026
Kind
B2
Abstract

A display film includes a transparent glass layer having a thickness of 250 micrometers or less, or in a range from 25 to 100 micrometers. A transparent energy dissipation layer is fixed to the transparent glass layer. The transparent energy dissipation layer has a glass transition temperature of 27 degrees Celsius or less and a Tan Delta peak value of 0.5 or greater, or from 1 to 2.

Claims (31)

1 . A display film comprising:

a transparent glass layer having a thickness of 250 micrometers or less; and

a transparent energy dissipation layer fixed to the transparent glass layer, the transparent energy dissipation layer comprising a cross-linked polyurethane and having a glass transition temperature 27 degrees Celsius and negative 25 degrees Celsius and a Tan Delta peak value between 0.5 and 2.0,

wherein the display film has a haze of 2.0% or less.

2 . The display film according to claim 1 , wherein the transparent energy dissipation layer comprises a cross-linked polyurethane acrylate layer.

3 . The display film according to claim 1 , wherein the transparent energy dissipation layer has a glass transition temperature 10 degrees Celsius and negative 25 degrees Celsius.

4 . The display film according to claim 1 , wherein the transparent energy dissipation layer has a thickness in a range from 20 to 200 micrometers.

5 . The display film according to claim 1 , wherein the transparent energy dissipation layer is directly fixed to the transparent glass layer.

6 . The display film according to claim 1 , wherein the transparent energy dissipation layer is fixed to the transparent glass layer by an intermediate adhesive layer.

7 . The display film according to claim 1 , further comprising a protective layer fixed to the transparent glass layer, and the transparent glass layer separates the transparent energy dissipation layer from the protective layer.

8 . The display film according to claim 7 , further comprising an optically clear adhesive layer separating the protective layer from the transparent glass layer.

9 . The display film according to claim 1 , further comprising a coupling layer disposed on the transparent energy dissipation layer, and the transparent energy dissipation layer separates the coupling layer from the transparent glass layer, the coupling layer having a shear modulus of 200 kPa or less over a temperature range from −40 degrees Celsius to 70 degrees Celsius.

10 . The display film according to claim 9 , further comprising a release liner contacting the coupling layer.

11 . The display film according to claim 1 , wherein the transparent energy dissipation layer has a Tan Delta peak value of 0.5 or greater, and the transparent energy dissipation layer has a cross-link density in a range from 0.1 to 1.0 mol/kg.

12 . The display film according to claim 1 , wherein the display film has a visible light transmission of 85% or greater.

13 . The display film according to claim 1 , wherein the display film has a thickness in a range from 30 to 300 micrometers.

14 . A display film comprising:

a transparent glass layer having a thickness of 250 micrometers or less;

a transparent energy dissipation layer fixed to the transparent glass layer, the transparent energy dissipation layer comprising a cross-linked polyurethane and having glass transition temperature 27 degrees Celsius and negative 25 degrees Celsius and a Tan Delta peak value between 0.5 and 2.0; and

a protective layer fixed to the transparent glass layer, the transparent glass layer separates the transparent energy dissipation layer from the protective layer,

wherein the display film has a haze of 2.0% or less.

15 . The display film according to claim 14 , further comprising a coupling layer disposed on the transparent energy dissipation layer, the transparent energy dissipation layer separates the coupling layer from the transparent glass layer.

16 . The display film according to claim 15 , further comprising a release liner contacting the coupling layer.

17 . A display film comprising:

a transparent glass layer having a thickness of 250 micrometers or less;

a transparent energy dissipation layer fixed to the transparent glass layer, the transparent energy dissipation layer comprising a crosslinked polyurethane and has a glass transition temperature 27 degrees Celsius and negative 25 degrees Celsius, a Tan Delta peak value between 0.5 and 2.0;

an optically clear adhesive layer disposed on the transparent glass layer; and

a protective layer disposed on the optically clear adhesive layer, and the optically clear adhesive layer separates the transparent energy dissipation layer from the protective layer,

wherein the display film has a haze of 2.0% or less.

18 . The display film according to claim 17 , further comprising a coupling layer disposed on the transparent energy dissipation layer, the transparent energy dissipation layer separates the coupling layer from the transparent glass layer.

19 . The display film according to claim 18 , further comprising a release liner contacting the coupling layer.