Glass and polymer film assemblies and methods of making

Patent metadata

Field	Value
Publication number	US-10688768-B2
Application number	US-201515326215-A
Country	US
Kind code	B2
Filing date	Jul 31, 2015
Priority date	Aug 15, 2014
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A glass and polymer film assembly including a glass film and a polymer film bonded to a surface of the glass film. The polymer film is directly bonded to the glass film by applying the polymer to the glass film when the glass film is above a bonding temperature of the polymer film. The glass film may have a thickness less than about 1 mm and the polymer film may be an oriented semicrystalline homopolymer which is permanently bonded to a major surface of the glass film.

First claim

What is claimed is:

1. A method of forming a glass and polymer film assembly, comprising the steps of:
providing a first film comprising an oriented first polymer layer and a glass layer releasably bonded to the first polymer layer;
providing a glass sheet having a first major surface and a second major surface opposite the first major surface, the glass sheet having a thickness less than about 1 mm;
applying the first film directly to the first major surface of the glass sheet such that the first polymer layer contacts the first major surface of the glass sheet, wherein the glass sheet is at a temperature above a bonding temperature of the first polymer layer during the step of applying the first film;
allowing the first polymer layer to permanently bond to the first major surface of the glass sheet, wherein the first polymer layer remains oriented after being bonded to the glass sheet and
removing the glass layer from the first polymer layer after the first polymer layer has been permanently bonded to the first major surface of the glass sheet.

2. The method of claim 1 , wherein the first polymer layer is a homopolymer layer.

3. The method of claim 1 , further comprising the steps of:
providing a second film, the second film comprising an oriented second polymer layer; and
applying the second film directly to the second major surface of the glass sheet such that the second polymer layer contacts the second major surface of the glass sheet, wherein the glass sheet is at a temperature above a bonding temperature of the second polymer layer during the step of applying the second film; and
allowing the second polymer layer to bond to the second major surface of the glass sheet, and wherein the second polymer layer remains oriented after being bonded to the glass sheet.

4. The method of claim 3 , wherein the step of applying the second film occurs concurrently with the step of applying the first film.

5. The method of claim 3 , wherein the first and second polymer layers are homopolymer layers.

6. The method of claim 5 , wherein the first and second polymer layers have balanced degrees of orientation.

7. The method of claim 1 , wherein the bonding temperature is above room temperature.

8. The method of claim 1 , wherein a temperature at an interface between the first polymer layer and the glass sheet is above the bonding temperature for a time in a range of about 0.01 milliseconds to about 1 millisecond.

9. A method of forming a glass and polymer film assembly, comprising the steps of:
providing a first film comprising an oriented first polymer layer and a glass layer releasably bonded to the first polymer layer;
providing a molten glass at a first temperature;
forming a glass sheet by cooling the molten glass to a second temperature higher than a bonding temperature of the first polymer layer and higher than room temperature, the glass sheet having a first major surface and a second major surface opposite the first major surface;
applying the first film directly to the first major surface of the glass sheet such that the first polymer layer contacts the first major surface of the glass sheet, wherein the glass sheet is at the second temperature during the step of applying the first film;
allowing the first polymer layer to permanently bond to the first major surface of the glass sheet, wherein the first polymer layer remains oriented after being bonded to the glass sheet; and
removing the glass layer from the first polymer later after the first polymer layer has been permanently bonded to the first major surface of the glass sheet.

10. The method of claim 9 , wherein the first polymer layer is a homopolymer layer.

11. The method of claim 9 , further comprising the steps of:
providing a second film, the second film comprising an oriented second polymer layer; and
applying the second film directly to the second major surface of the glass sheet such that the second polymer layer contacts the second major surface of the glass sheet, wherein the glass sheet is at a temperature above a bonding temperature of the second polymer layer during the step of applying the second film; and
allowing the second polymer layer to bond to the second major surface of the glass sheet, wherein the second polymer layer remains oriented after being bonded to the glass sheet.

12. The method of claim 11 , wherein the step of applying the second film occurs concurrently with the step of applying the first film.

13. The method of claim 11 , wherein the first and second polymer layers are homopolymer layers.

14. The method of claim 9 , wherein the glass sheet has a thickness less than about 1 mm.

15. The method of claim 9 , wherein a temperature at an interface between the first polymer layer and the glass sheet is above the bonding temperature of the first polymer layer for a time in a range of about 0.01 milliseconds to about 1 millisecond.

Assignees

• 3M Innovative Properties Co

Inventors

• Ouderkirk Andrew J

Classifications

• B32B38/10 Primary

  Removing layers, or parts of layers, mechanically or chemically · CPC title

• B29C65/028 Primary

  making use of inherent heat, i.e. the heat for the joining comes from the moulding process of one of the parts to be joined · CPC title

• B32B17/10

  of synthetic resin · CPC title

• B32B2309/10

  linear, e.g. length, distance, width · CPC title

• B32B37/144

  using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding (constructional features for tensioning B32B38/1825) · CPC title