US 2026/0264371 A1 · INTERMEDIATE FILM FOR LAMINATED GLASS, AND LAMINATED GLASS

Abstract

Provided is an interlayer film for laminated glass that is less likely to curve. An interlayer film for laminated glass according to the present invention includes a first resin layer containing a thermoplastic resin; a second resin layer containing a thermoplastic resin; and an optical film, and the first resin layer is arranged on a first surface side of the optical film, the second resin layer is arranged on a second surface side opposite to the first surface of the optical film, a thickness T1 of the first resin layer is smaller than a thickness T2 of the second resin layer, a ratio of a heat shrinkage rate A1 of the first resin layer in a direction where heat shrinkage rate of the first resin layer becomes maximum to a heat shrinkage rate A2 of the second resin layer in a direction where heat shrinkage rate of the second resin layer becomes maximum is more than 1 and 5 or less.

Claims22

Dependent claims

An interlayer film for laminated glass, comprising:

a first resin layer containing a thermoplastic resin;
a second resin layer containing a thermoplastic resin;
and
an optical film,
wherein the first resin layer being arranged on a first surface side of the optical film, the second resin layer being arranged on a second surface side opposite to the first surface of the optical film,
a thickness T1 of the first resin layer being smaller than a thickness T2 of the second resin layer,
a ratio of a heat shrinkage rate A1 of the first resin layer in a direction where heat shrinkage rate of the first resin layer becomes maximum to a heat shrinkage rate A2 of the second resin layer in a direction where heat shrinkage rate of the second resin layer becomes maximum being more than 1 and 5 or less.

4 more elements

An interlayer film for laminated glass comprising:

a first resin layer containing a thermoplastic resin;
a second resin layer containing a thermoplastic resin;
and
an optical film,
wherein the first resin layer being arranged on a first surface side of the optical film, the second resin layer being arranged on a second surface side opposite to the first surface of the optical film,
a thickness T1 of the first resin layer being smaller than a thickness T2 of the second resin layer,
a ratio of a heat shrinkage rate A1 of the first resin layer in a direction where heat shrinkage rate of the first resin layer becomes maximum to a heat shrinkage rate A2 of the second resin layer in a direction where heat shrinkage rate of the second resin layer becomes maximum being more than 1,
a value X determined by a formula (X) below from the heat shrinkage rate A1 of the first resin layer in the direction where heat shrinkage rate of the first resin layer becomes maximum, the heat shrinkage rate A2 of the second resin layer in the direction where heat shrinkage rate of the second resin layer becomes maximum, the thickness T1 of the first resin layer, and the thickness T2 of the second resin layer being more than 0.5 and 2.5 or less:
Value
⁢
X
=
(
A
⁢
1
×
T
⁢
1
)
/
(
A
⁢
2
×
T
⁢
2
)
.
(
X
)

32 more elements

Dependencies are inferred from the claim text.

Intermediate film for laminated glass, and laminated glass

Life of this patent

Intermediate film for laminated glass, and laminated glass

Life of this patent

Abstract

Claims22