Interlayer for laminated glass, laminated glass, production method for embossing roll, and production method for interlayer for laminated glass

Patent metadata

Field	Value
Publication number	US-11318718-B2
Application number	US-202117148069-A
Country	US
Kind code	B2
Filing date	Jan 13, 2021
Priority date	Apr 10, 2015
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

The present invention aims to provide an interlayer film for a laminated glass having recesses in the shape of engraved lines on both surfaces to exhibit excellent deaeration properties in production of a laminated glass and suppressing formation of a moire pattern when unwound from a rolled body thereof. The present invention also aims to provide a laminated glass including the interlayer film for a laminated glass, a method for producing an embossing roll suitably used for production of the interlayer film for a laminated glass, and a method for producing the interlayer film for a laminated glass. The present invention relates to an interlayer film for a laminated glass, having a large number of recesses on both surfaces, the recesses each having a groove shape with a continuous bottom and being regularly adjacent and parallel to each other, the interlayer film having a glossiness on a surface with the large number of recesses measured in conformity with JIS Z 8741-1997 of higher than 3% or a haze value measured in conformity with JIS K 7105-1981 of 87% or lower.

First claim

The invention claimed is:

1. A method for producing an embossing roll, comprising:
an embossing roll production step 1 of forming protrusions and recesses on a metal roll by blasting with an abrasive material;
an embossing roll production step 2 of grinding a portion of each protrusion on the metal roll provided with the protrusions and recesses into a flat surface portion; and
an embossing roll production step 3 of forming protrusions and recesses by blasting with an abrasive material finer than the abrasive material used in the embossing roll production step 1,
wherein a grain size of the abrasive material used in the embossing roll production step 3 is F150 to F360 or #240 to #700 as defined in JIS R6001 (1998).

2. The method for producing an embossing roll according to claim 1 ,
wherein the abrasive material used in the embossing roll production step 3 has a grain diameter at a cumulative height of 3% in conformity with JIS R6001 (1998) of 150 μm or less and a grain diameter at a cumulative height of 94% in conformity with JIS R6001 (1998) of 11 μm or more.

3. The method for producing an embossing roll according to claim 1 ,
wherein the grain size of the abrasive material used in the embossing roll production step 3 is #240 to #400 as defined in JIS R6001 (1998).

Assignees

• Sekisui Chemical Co Ltd

Inventors

• Nakayama Kazuhiko
• Omizu Morimasa
• Kondou Masaya

Classifications

• B32B38/06

  Embossing · CPC title

• B32B17/10761

  containing vinyl acetal · CPC title

• B24C3/32

  designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks (B24C3/08, B24C3/18 take precedence) · CPC title

• E06B3/6608

  without separate spacing elements (E06B3/6707 and E06B3/6715 take precedence) · CPC title

• E06B3/6775

  Evacuating or filling the gap during assembly · CPC title