Soundproofing laminated window for vehicles

• US 20020068177A1
• Filed: 12/28/2001
• Published: 06/06/2002
• Est. Priority Date: 11/26/1996
• Status: Active Grant

• Current Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Vitrage
• Inventors: Rehfeld, Marc, Garnier, Gilles, Kraemling, Franz
• Granted Patent: US 6,821,629 B2
• Time in Patent Office: Days
• US Class Current: 428/430
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10743 containing acrylate (co)polymers or salts thereof
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 17/10779 containing polyester
• CPC Class Codes: B32B 17/10816 by pressing
• CPC Class Codes: B32B 2307/102 Insulating
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: Y10T 428/24 Structurally defined web or sheet [e.g., overall dimension, etc.]
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/2495 Thickness [relative or absolute]
• CPC Class Codes: Y10T 428/24959 of adhesive layers
• CPC Class Codes: Y10T 428/24967 Absolute thicknesses specified
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick
• CPC Class Codes: Y10T 428/265 1 mil or less
• CPC Class Codes: Y10T 428/31601 Quartz or glass
• CPC Class Codes: Y10T 428/31616 Next to polyester [e.g., alkyd]
• CPC Class Codes: Y10T 428/31627 Next to aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/3163 : Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]
• CPC Class Codes: Y10T 428/31645 : Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31649 : Ester, halide or nitrile of addition polymer
• CPC Class Codes: Y10T 428/31667 : Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/31797 : Next to addition polymer from unsaturated monomers

Abstract

The invention relates to a soundproofing window in which an intermediate film provides for damping of vibrations transmitted in particular by structure-borne conduction.

Claims

1. A laminated window comprising a glass sheet and an intermediate film, wherein said film has a loss factor tan δ

greater than 0.6 and a shear modulus G′

smaller than 2×

10⁷ N/cm² in a temperature range between 10 and 60°

C. and in a frequency range between 50 and 10,000 Hz.

2. A window according to claim 1, wherein said intermediate film is associated with at least one film of normal acoustic performance.

3. A window according to claim 2, wherein the intermediate film is a thermoplastic acrylic polymer film 0.05 to 1.0 mm thick, and wherein this film is joined to a glass sheet with interposition of a polyester film 0.01 to 0.1 mm thick, and a thermoplastic cement film 0.3 to 0.8 mm thick.

4. A window according to claim 3, comprising two glass sheets each of which are respectively joined to the thermoplastic acrylic film by said thermoplastic cement film and a polyester film.

5. A window according to claim 1, further comprising a thermoplastic cement film, a polyester film interposed between the thermoplastic cement film and the intermediate film, and a polyester film juxtaposed on the other face of the intermediate film and provided on its free surface with an abrasion-resistant layer.

6. A window according to claim 1, wherein the intermediate film comprises viscoelastic polymer made of acrylic polymer without plasticizer having a shear modulus G′

between 10^4.5 Pa at 60°

C. and 10^6.5 Pa at 0°

C. as well as a loss factor tan 6 between approximately 0.8 and 1 in a temperature range of 0 to 60°

C.

7. A window according to claim 2, wherein the intermediate film comprises viscoelastic polymer made of acrylic polymer without plasticizer having a shear modulus G′

between 10^4.5 Pa at 60°

C. and 10^6.5 Pa at 0°

C. as well as a loss factor tan δ

between approximately 0.8 and 1 in a temperature range of 0 to 60°

C.

8. A window according to claim 3, wherein the intermediate film comprises viscoelastic polymer made of acrylic polymer without plasticizer having a shear modulus G′

between 10^4.5 Pa at 60°

C. and 10^6.5 Pa at 0°

C. as well as a loss factor tan 6 between approximately 0.8 and 1 in a temperature range of 0 to 60°

C.

9. A window according to claim 4, wherein the intermediate film comprises viscoelastic polymer made of acrylic polymer without plasticizer having a shear modulus G′

between 10^4.5 Pa at 60°

C. and 10^6.5 Pa at 0°

C. as well as a loss factor tan δ

between approximately 0.8 and 1 in a temperature range of 0 to 60°

C.

10. A window according to claim 5, wherein the intermediate film comprises viscoelastic polymer made of acrylic polymer without plasticizer having a shear modulus G′

between 10^4.5 Pa at 60°

C. and 10^6.5 Pa at 0°

C. as well as a loss factor tan δ

between approximately 0.8 and 1 in a temperature range of 0 to 60°

C.

11. A window according to claim 3, wherein said polyester film is a polyethylene terephthalate film.

12. A window according to claim 1, wherein one of the layers of the laminated window is provided with a layer that reflects infrared radiation.

14. A film according to claim 13, wherein said film is associated with at least one film of normal acoustic performance.

15. A film according to claim 14, wherein said film is a thermoplastic acrylic polymer film 0.05 to 1.0 mm thick, and wherein said film is joined to at least one glass sheet with interposition of a polyester film 0.01 to 0.1 mm thick and a thermoplastic cement film 0.3 to 0.8 mm thick.

16. A film according to claim 15, wherein the thermoplastic film comprises viscoelastic polymer made of acrylic polymer without plasticizer having a shear modulus G′

between 10^4.5 Pa at 60°

C. and 10^6.5 Pa at 0°

C., as well as a loss factor tan δ

between approximately 0.8 and 1 in a temperature range of 0 to 60°

C.

17. A film according to claim 13, wherein said film comprises plasticizers and polyvinylacetal resins.

13. A film designed to be used as an intermediate layer in a soundproofing laminated window, said film having a loss factor tan δ

greater than 0.6 and a shear modulus G′

smaller than 2×

10⁷ N/cm² in a temperature range between 10 and 60°

C. and in a frequency range between 50 and 10,000 Hz.

18. A method for the acoustic attenuation of noises of structure-borne origin in an article of manufacture, comprising installing a window made of at least one glass sheet and one intermediate film, wherein the intermediate film of the laminated window has a loss factor tan δ

greater than 0.6 and a shear modulus G′

smaller than 2×

10⁷ N/cm² in a temperature range between 10 and 60°

C. and in a frequency range between 50 and 10,000 Hz in said article.