Interlayer film for laminated glass and laminated glass

Patent metadata

Field	Value
Publication number	US-2016151995-A1
Application number	US-201414905995-A
Country	US
Kind code	A1
Filing date	Aug 1, 2014
Priority date	Aug 1, 2013
Publication date	Jun 2, 2016
Grant date	—

Abstract

The present invention is an interlayer film for laminated glass that includes 2 or more resin layers laminated on each other. The interlayer film for laminated glass has a large number of recesses and a large number of protrusions on at least one surface thereof. The recesses each have a groove shape with a continuous bottom. The recesses adjacent to each other are parallel to each other and regularly arranged in a line.

First claim

1 . An interlayer film for laminated glass comprising 2 or more resin layers laminated on each other,
wherein the interlayer film has a large number of recesses and a large number of protrusions on at least one surface thereof, the recesses each have a groove shape with a continuous bottom, the recesses adjacent to each other are parallel to each other and regularly arranged in a line, within the surface including the large number of recesses and the large number of protrusions, a groove depth (Rzg) of the recesses measured based on JIS B-0601 (1994) is 10 μm to 40 μm, and a 10-point average roughness (Rz) of a surface of a resin layer having the surface including the large number of recesses and the large number of protrusions measured based on JIS B 0601 (1994) is less than 2.7 μm, and the 10-point average roughness (Rz) is obtained by peeling off the resin layer having the surface including the large number of recesses and the large number of protrusions from another resin layer coming into direct contact with the aforementioned resin layer and then measuring the surface of the peeled off resin on a side of the aforementioned another resin layer that came into direct contact with the peeled off resin layer based on JIS B 0601 (1994).

2 . The interlayer film for laminated glass according to claim 1 ,
wherein the recesses adjacent to each other are parallel to each other and arranged in a line at an equal interval.

3 . The interlayer film for laminated glass according to claim 1 wherein the resin layers contain polyvinyl acetal and a plasticizer.

4 . The interlayer film for laminated glass according to claim 3 , comprising at least:
a first resin layer; and a second resin layer, wherein the amount of hydroxyl groups of the polyvinyl acetal contained in the first resin layer is different from the amount of hydroxyl groups of the polyvinyl acetal contained in the second resin layer.

5 . The interlayer film for laminated glass according to claim 3 ,
wherein the content of the plasticizer in the first resin layer with respect to 100 parts by mass of the polyvinyl acetal is different from the content of the plasticizer in the second resin layer with respect to 100 parts of the polyvinyl acetal.

6 . An interlayer film for laminated glass comprising:
2 protective layers; and a sound insulating layer laminated between the protective layers, wherein the sound insulating layer contains a plasticizer in an amount of 45 parts by mass to 80 parts by mass with respect to 100 parts by mass of polyvinyl acetal, the protective layers contain a plasticizer in an amount of 20 parts by mass to 45 parts by mass with respect to 100 parts by mass of polyvinyl acetal, the protective layers have a large number of recesses and a large number of protrusions on at least one surface thereof, the recesses each have a groove shape with a continuous bottom, the recesses adjacent to each other are parallel to each other and regularly arranged in a line, within the surface of the protective layers having the large number of recesses and the large number of protrusions, a groove depth (Rzg) of the recesses measured based on JIS B-0601 (1994) is 10 μm to 40 μm, a 10-point average roughness (Rz) of a surface of the protective layer having the surface including the large number of recesses and the large number of protrusions measured based on JIS B 0601 (1994) is less than 2.7 μm, and the 10-point average roughness (Rz) is obtained by peeling off the protective layer having the surface including the large number of recesses and the large number of protrusions from the sound insulating layer and then measuring the surface of the peeled off protective layer on a side of the sound insulating layer based on JIS B 0601 (1994).

7 . Laminated glass comprising:
a pair of glass plates; and the interlayer film for laminated glass according to claim 1 that is laminated between the glass plates.

8 . Laminated glass comprising:
a pair of glass plates; and the interlayer film for laminated glass according to claim 6 that is laminated between the glass plates.

Assignees

• Sekisui Chemical Co Ltd

Inventors

• Kitano Hirofumi
• Inui Hiroaki
• KATAYAMA Taiki
• Matsumoto Manabu
• Nakayama Kazuhiko

Classifications

• B32B2250/00

  Layers arrangement · CPC title

• B32B27/306

  comprising vinyl acetate or vinyl alcohol (co)polymers · CPC title

• B32B27/00

  Layered products comprising {a layer of} synthetic resin {(fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18)} · CPC title

• B32B27/06

  as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08)} · CPC title

• B32B27/28

  comprising synthetic resins not wholly covered by any one of the sub-groups {B32B27/30 - B32B27/42} · CPC title