# US 12,594,744 B2 · Interlayer film for laminated glass, and laminated glass

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,594,744 B2
- Document ID: US12594744B2
- Status: Granted
- Kind: B2
- Application number: 17/798,443
- Filed: 2021-03-30
- Published: 2023-04-06
- Granted: 2026-04-07
- Earliest claimed: 2020-03-30
- Assignees: Sekisui Chemical Co., Ltd.
- Applicants: Sekisui Chemical Co., Ltd.
- Inventors: Jun Ishida; Hiromitsu Nishino
- Web page: https://patentgrep.com/patent/US12594744B2

## CPC

- B32B 17/10568: {varying in thickness}
- B32B 3/263: {characterised by a layer having non-uniform thickness}
- B32B 7/027: Thermal properties
- B32B 17/10036: {comprising two outer glass sheets}
- B32B 27/08: of synthetic resin
- B32B 27/30: comprising vinyl {(co)polymers; comprising acrylic (co)polymers}
- B60K 35/23: Head-up displays [HUD] (optical aspects of head-up displays G02B27/01)
- B32B 2250/05: 5 or more layers
- B32B 2250/42: Alternating layers, e.g. ABAB(C), AABBAABB(C)
- B32B 2307/102: Insulating
- B32B 2307/412: Transparent
- B32B 2307/732: Dimensional properties
- B32B 2307/7376: Thickness
- B60K 35/415: {Glare prevention}
- B60K 35/50: Instruments characterised by their means of attachment to or integration in the vehicle (B60K35/231 takes precedence)
- B60K 35/60: Instruments characterised by their location or relative disposition in or on vehicles (arrangements of lighting devices on dashboards B60Q3/10)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES

## Abstract

Provided is an interlayer film for laminated glass capable of preventing a winding core from falling off a roll body of the interlayer film. The interlayer film for laminated glass according to the present invention includes one end and the other end being on an opposite side of the one end, the one end having a thickness of 1.05 mm or less, a first resin layer having a glass transition temperature of less than 15° C., a second resin layer having a glass transition temperature of 15° C. or more, and a region where a total number of laminated layers of the first resin layer and the second resin layer in a thickness direction is five or more, and in the region where the total number of laminated layers is five or more, the region has Y1/Z being 1.01 or more when a thickness by one layer of surface layers is denoted by Y1 μm and a thickness by one layer of layers neighboring the surface layers is denoted by Z μm.

## Claims

### Claim 1

An interlayer film for laminated glass, the interlayer film comprising:
one end and the other end being on an opposite side of the one end, the one end having a thickness of 1.05 mm or less;
a first resin layer having a glass transition temperature of less than 15° C.;
a second resin layer having a glass transition temperature of 15° C. or more; and
a region where a total number of laminated layers of the first resin layer and the second resin layer in a thickness direction is five or more and ten or less,
the region where the total number of laminated layers is five or more and ten or less, the region having Y1/Z being 3.67 or more and 6.19 or less when a thickness by one layer of surface layers is denoted by Y1 μm and a thickness by one layer of layers neighboring the surface layers is denoted by Z μm,
wherein the interlayer film has a length L from the one end and the other end of the interlayer film and the length L is 0.5 m or more, and
wherein, when an average thickness of a layer other than surface layers in a region from a position of 50 mm to a position of 150 mm from the one end of the length L of the interlayer film is denoted by Y5 μm and an average thickness of a layer other than surface layers in a region from a position of 50 mm to a position of 150 mm from the other end of the length L of the interlayer film is denoted by Y6 μm, Y6/Y5 is 1.20 or more and 2.5 or less.

### Claim 2 (depends on 1)

The interlayer film for laminated glass according to claim 1, wherein the other end has a thickness that is larger than a thickness of the one end.

### Claim 3 (depends on 1)

The interlayer film for laminated glass according to claim 1, having a region where the first resin layer and the second resin layer are alternately laminated in the thickness direction.

### Claim 4 (depends on 1)

The interlayer film for laminated glass according to claim 1, wherein a surface layer is the second resin layer.

### Claim 5 (depends on 1)

The interlayer film for laminated glass according to claim 1, wherein when a thickness of the interlayer film is denoted by X μm, and a thickness by one layer of surface layers is denoted by Y2 μm, the interlayer film has a region where Y2/X is 0.3 or less.

### Claim 6 (depends on 1)

The interlayer film for laminated glass according to claim 1,
wherein an average thickness of each surface layer in a region from a position of 100 mm to a position of 400 mm from the one end of the length L of the interlayer film is less than 300 μm.

### Claim 7 (depends on 1)

The interlayer film for laminated glass according to claim 1,
wherein when an average thickness of a surface layer in a region from a position of 50 mm to a position of 150 mm from the one end of the length L of the interlayer film is denoted by Y3 μm, and an average thickness of a surface layer in a region from a position of 50 mm to a position of 150 mm from the other end of the length L of the interlayer film is denoted by Y4 μm, Y4/Y3 is 2.5 or less.

### Claim 8 (depends on 1)

The interlayer film for laminated glass according to claim 1, wherein
the interlayer film has a region for display corresponding to a display region of a head-up display, and
an average thickness of each surface layer in the region for display is less than 300 μm.

### Claim 9 (depends on 1)

The interlayer film for laminated glass according to claim 1, wherein when a total thickness of layers of the first resin layer is denoted by T1 μm, and a total thickness of layers of the second resin layer is denoted by T2 μm, the interlayer film has a region where T2/T1 is 1 or more.

### Claim 10 (depends on 1)

The interlayer film for laminated glass according to claim 1, wherein a wedge angle θ of the interlayer film is 0.05 mrad or more.

### Claim 11 (depends on 1)

A laminated glass comprising:
a first lamination glass member;
a second lamination glass member; and
the interlayer film for laminated glass according to claim 1,
the interlayer film for laminated glass being arranged between the first lamination glass member and the second lamination glass member.