Embossed polymer sheet

Patent metadata

Field	Value
Publication number	US-9574028-B2
Application number	US-201414219489-A
Country	US
Kind code	B2
Filing date	Mar 19, 2014
Priority date	Apr 9, 2013
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

A high frequency semi-isotropic embossed polymer interlayer sheet is disclosed. The embossed polymer interlayer sheet has a first side; a second side opposing the first side; and an embossed surface on at least one of the sides, and a surface texture ratio, Str, (as measured per ISO 25178) of between 0.1 and 0.99. The embossed polymer sheet may have at least 50 roughness peaks per centimeter (R PC, as measured per ASME B46.1 [1985]). The embossed polymer sheet may have a mottle value of less than or equal to 2.5 (as measured by a Clear Mottle Analyzer [CMA]). The embossed polymer sheet may be polyvinyl butyral.

First claim

What is claimed is:

1. An embossed polymer interlayer sheet comprising: a first side; a second side opposing the first side; and an embossed surface on at least one of the sides, wherein the embossed polymer interlayer sheet has a high frequency semi-isotropic surface having a surface texture ratio, Str, (as measured per ISO 25178) of between 0.2 and 0.99, wherein the embossed polymer interlayer sheet has a peak height distribution kurtosis, Sku, of greater than 3.0 (as measured per ISO 25178), and wherein the polymer is polyvinyl butyral.

2. The embossed polymer interlayer sheet of claim 1 , wherein the Str value (as measured per ISO 25178) is greater than 0.5.

3. The embossed polymer interlayer sheet of claim 1 , wherein the embossed polymer interlayer sheet has at least 50 roughness peaks per centimeter (R PC, as measured per ASME B46.1 (1985)).

4. The embossed polymer interlayer sheet of claim 1 , wherein the embossed polymer interlayer sheet has at least 85 roughness peaks per centimeter (R PC, as measured per ASME B46.1 (1985)).

5. The embossed polymer interlayer sheet of claim 1 , wherein the embossed polymer interlayer sheet has at least 100 roughness peaks per centimeter (R PC, as measured per ASME B46.1 (1985)).

6. The embossed polymer interlayer sheet of claim 1 , wherein the embossed polymer interlayer sheet has uniform de-airing and an average light transmission of at least 70% when placed between two glass substrates and de-aired using a cold nip roll process.

7. The embossed polymer interlayer sheet of claim 1 , wherein the embossed polymer interlayer sheet has a mottle value of less than or equal to 2.5 (as measured by a Clear Mottle Analyzer (CMA)) when laminated between two glass substrates.

8. The embossed polymer interlayer sheet of claim 1 , wherein the embossed polymer interlayer sheet has a surface roughness, Sz, of from about 5 to about 50 microns.

9. The embossed polymer interlayer sheet of claim 1 , wherein the embossed polymer interlayer sheet comprises a multi-layer sheet.

10. The embossed polymer interlayer sheet of claim 1 , wherein the Str value (as measured per ISO 25178) is between 0.2 and 0.8.

11. An embossed polymer interlayer sheet comprising: a first side; a second side opposing the first side; and an embossed surface on at least one of the sides, wherein the embossed polymer interlayer sheet has a semi-isotropic surface having a surface texture ratio, Str, (as measured per ISO 25178) of between 0.2 and 0.99 and wherein the embossed polymer interlayer sheet has at least 50 roughness peaks per centimeter (R PC, as measured per ASME B46.1 (1985)), wherein the embossed polymer interlayer sheet has a peak height distribution kurtosis, Sku, of greater than 3.0 (as measured per ISO 25178), and wherein the polymer is polyvinyl butyral.

12. The embossed polymer interlayer sheet of claim 11 , wherein the embossed polymer interlayer sheet has uniform de-airing and an average light transmission of at least 70% when placed between two glass substrates and de-aired using a cold nip roll process.

13. The embossed polymer interlayer sheet of claim 11 , wherein the embossed polymer interlayer sheet has a mottle value of less than or equal to 2.5 when laminated between two glass substrates (as measured by a Clear Mottle Analyzer (CMA)).

14. The embossed polymer interlayer sheet of claim 11 , wherein the embossed polymer interlayer sheet comprises a multi-layer sheet.

15. An embossed polymer interlayer sheet comprising: a first side; a second side opposing the first side; and an embossed surface on at least one of the sides, wherein the embossed polymer interlayer sheet has a high frequency semi-isotropic surface having at least 50 roughness peaks per centimeter (R PC, as measured per ASME B46.1 (1985)), and wherein the embossed polymer interlayer sheet has uniform de-airing and an average light transmission of at least 70% when placed between two glass substrates and de-aired using a cold nip roll process, wherein the embossed polymer interlayer sheet has a peak height distribution kurtosis, Sku, of greater than 3.0 (as measured per ISO 25178), and wherein the polymer is polyvinyl butyral.

16. The embossed polymer interlayer sheet of claim 15 , wherein the Str value (as measured per ISO 25178) is between 0.2 and 0.99.

17. The embossed polymer interlayer sheet of claim 15 , wherein the embossed polymer interlayer sheet has a mottle value of less than or equal to 2.5 when laminated between two glass substrates (as measured by a Clear Mottle Analyzer (CMA)).

18. The embossed polymer interlayer sheet of claim 15 , wherein the embossed polymer interlayer sheet comprises a multi-layer sheet.

Assignees

• Solutia Inc

Inventors

• Yacovone Vincent J

Classifications

• Y10T428/24355

  Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] · CPC title

• C08F116/06 Primary

  Polyvinyl alcohol {; Vinyl alcohol} · CPC title

• B32B17/10577

  Surface roughness · CPC title

• B32B17/10587

  created by embossing · CPC title

• B32B17/10761

  containing vinyl acetal · CPC title