INTERLAYER FILM FOR LAMINATED GLASS, METHOD FOR MANUFACTURING INTERLAYER FILM FOR LAMINATED GLASS, AND LAMINATED GLASS

• US 20160361905A1
• Filed: 02/25/2015
• Published: 12/15/2016
• Est. Priority Date: 02/25/2014
• Status: Active Grant

• Current Assignee: Sekisui Chemical Company Limited (Sekisui)
• Original Assignee: Sekisui Chemical Company Limited (Sekisui)
• Inventors: Matsudou, Masaki, Yamaguchi, Kouhei, Yamamoto, Masaki, Nakajima, Daisuke, Matsumoto, Izumi
• Granted Patent: US 10,906,279 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10678 comprising UV absorbers or stabilizers, e.g. antioxidants
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2307/54 Yield strength; Tensile strength
• CPC Class Codes: B32B 2307/71 Resistive to light or to UV
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 2605/00 Vehicles
• CPC Class Codes: B32B 2605/006 Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• CPC Class Codes: B32B 27/22 using plasticisers
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: C03C 27/10 with the aid of adhesive specially adapted for that purpose

Abstract

There is provided an interlayer film for laminated glass with which the processability at the time of preparation of laminated glass can be enhanced, furthermore, a large broken piece of glass is hardly generated even when laminated glass is broken, and laminated glass can have a high level of safety. The interlayer film for laminated glass according to the present invention includes a plastic layer with a Young'"'"'s modulus of higher than or equal to 1 GPa and a first resin layer layered on a first surface of the plastic layer, is provided or not provided with a second resin layer layered on a second surface opposite to the first surface of the plastic layer, has the Young'"'"'s modulus of the plastic layer higher than the Young'"'"'s modulus of each of the first and second resin layers, and has an adhesive force between the plastic layer and each of the first and second resin layers measured in accordance with JIS K6854-2 of greater than or equal to 1 N/50 mm and less than or equal to 20 N/50 mm.

Claims

1. An interlayer film for laminated glass, comprising a plastic layer with a Young'"'"'s modulus of higher than or equal to 1 GPa and a first resin layer layered on a first surface of the plastic layer,

being provided or not provided with a second resin layer layered on a second surface opposite to the first surface of the plastic layer,

having the Young'"'"'s modulus of the plastic layer higher than the Young'"'"'s modulus of the first resin layer and having an adhesive force between the plastic layer and the first resin layer measured in accordance with JIS K6854-2 of greater than or equal to 1 N/50 mm and less than or equal to 20 N/50 mm, and

when the interlayer film is provided with the second resin layer, having the Young'"'"'s modulus of the plastic layer higher than the Young'"'"'s modulus of the second resin layer and having an adhesive force between the plastic layer and the second resin layer measured in accordance with JIS K6854-2 of greater than or equal to 1 N/50 mm and less than or equal to 20 N/50 mm.

2. The interlayer film for laminated glass according to claim 1, wherein the first resin layer contains a polyvinyl acetal resin and a plasticizer, and when the interlayer film is provided with the second resin layer, the second resin layer contains a polyvinyl acetal resin and a plasticizer.

3. The interlayer film for laminated glass according to claim 1, wherein the first resin layer and the plastic layer are subjected to thermocompression bonding by a roll-to-roll process under conditions of a heating temperature of higher than or equal to 65°

C. and lower than or equal to 150°

C., a pressure at the time of compression bonding of greater than or equal to 0.05 MPa and less than or equal to 0.5 MPa and a tensile force at the time of transportation of less than or equal to 100 N.

4. The interlayer film for laminated glass according to claim 1, being provided with the second resin layer.

5. The interlayer film for laminated glass according to claim 4, wherein the first resin layer, the plastic layer and the second resin layer are subjected to thermocompression bonding by a roll-to-roll process under conditions of a heating temperature of higher than or equal to 65°

C. and lower than or equal to 150°

C., a pressure at the time of compression bonding of greater than or equal to 0.05 MPa and less than or equal to 0.5 MPa and a tensile force at the time of transportation of less than or equal to 100 N.

6. The interlayer film for laminated glass according to claim 1, wherein the first resin layer contains an ultraviolet ray screening agent.

7. The interlayer film for laminated glass according to claim 1, being provided with the second resin layer,

wherein the second resin layer contains an ultraviolet ray screening agent.

8. The interlayer film for laminated glass according to claim 1, wherein the first resin layer contains an oxidation inhibitor.

9. The interlayer film for laminated glass according to claim 1, being provided with the second resin layer,

wherein the second resin layer contains an oxidation inhibitor.

13. Laminated glass, comprising a first laminated glass member, a second laminated glass member and an interlayer film for laminated glass according to claim 1,

the interlayer film for laminated glass being arranged between the first laminated glass member and the second laminated glass member.

10. A method for manufacturing an interlayer film for laminate glass, comprising the step of:

subjecting a first resin layer and a plastic layer with a Young'"'"'s modulus of higher than or equal to 1 GPa to thermocompression bonding by a roll-to-roll process under conditions of a heating temperature of higher than or equal to 65°

C. and lower than or equal to 150°

C., a pressure at the time of compression bonding of greater than or equal to 0.05 MPa and less than or equal to 0.5 MPa and a tensile force at the time of transportation of less than or equal to 100 N to obtain an interlayer film for laminated glass provided with the plastic layer and the first resin layer layered on a first surface of the plastic layer, or

subjecting the first resin layer, the plastic layer and a second resin layer to thermocompression bonding by a roll-to-roll process under conditions of a heating temperature of higher than or equal to 65°

C. and lower than or equal to 150°

C., a pressure at the time of compression bonding of greater than or equal to 0.05 MPa and less than or equal to 0.5 MPa and a tensile force at the time of transportation of less than or equal to 100 N to obtain an interlayer film for laminated glass provided with the plastic layer, the first resin layer layered on a first surface of the plastic layer and a second resin layer layered on a second surface opposite to the first surface of the plastic layer,

the Young'"'"'s modulus of the plastic layer being higher than the Young'"'"'s modulus of the first resin layer and the adhesive force between the plastic layer and the first resin layer measured in accordance with JIS K6854-2 being greater than or equal to 1 N/50 mm and less than or equal to 20 N/50 mm, and

when the interlayer film is provided with the second resin layer, the Young'"'"'s modulus of the plastic layer being higher than the Young'"'"'s modulus of the second resin layer and the adhesive force between the plastic layer and the second resin layer measured in accordance with JIS K6854-2 being greater than or equal to 1 N/50 mm and less than or equal to 20 N/50 mm.

11. The method for manufacturing an interlayer film for laminated glass according to claim 10, wherein the first resin layer contains a polyvinyl acetal resin and a plasticizer, and when the interlayer film is provided with the second resin layer, the second resin layer contains a polyvinyl acetal resin and a plasticizer.

12. The method for manufacturing an interlayer film for laminated glass according to claim 10, wherein an interlayer film for laminated glass provided with the second resin layer is obtained.

14. Laminated glass, comprising a first laminated glass member, a second laminated glass member and an interlayer film for laminated glass obtained by a method for manufacturing the interlayer film for laminated glass according to claim 10,

the interlayer film for laminated glass being arranged between the first laminated glass member and the second laminated glass member.