초록 ▼

The invention relates to an interlayer for use with a laminated glazing. The interlayer may be formed from at least two sheets of polyvinyl butyral provided with a reinforcement inserted therebetween, with the elastic energy needed to deform the interlayer in tension being at least 80 J/m 2 in all

The invention relates to an interlayer for use with a laminated glazing. The interlayer may be formed from at least two sheets of polyvinyl butyral provided with a reinforcement inserted therebetween, with the elastic energy needed to deform the interlayer in tension being at least 80 J/m 2 in all directions.

대표청구항 ▼

1. An interlayer for a laminated glazing, the interlayer comprising a pair of outer sheets formed from polyvinyl butyral and a reinforcement, which is a grid-like or mesh pattern of yarn arranged in at least two different directions, disposed therebetween, the interlayer having a tensile strength su

1. An interlayer for a laminated glazing, the interlayer comprising a pair of outer sheets formed from polyvinyl butyral and a reinforcement, which is a grid-like or mesh pattern of yarn arranged in at least two different directions, disposed therebetween, the interlayer having a tensile strength such that the elastic energy needed to deform the interlayer is at least about 80 J/m 2 in all directions. 2. The interlayer of claim 1, wherein the yarn is selected from the group consisting of glass yarn and nylon yarn. 3. The interlayer of claim 1, wherein the elastic energy (Et r ) is determined by the formula: Et r =σ e 2 πr 2 n/ 2 Y wherein σ e is tensile yield strength,Y is Young's modulus,r is the radius of the yarn, andn is the number of yarns per unit length. 4. An interlayer for a laminated glazing, the interlayer comprising a pair of outer sheets formed from polyvinyl butyral and a reinforcement consisting of (1) at least one polyester film having a thickness greater than 70 μm or (2) two polyester films separated by a PVB sheet, disposed therebetween, the interlayer having a tensile strength such that the elastic energy needed to deform the interlayer is at least about 80 J/m 2 in all directions. 5. The interlayer of claim 4, wherein said thickness is at least 80 μm. 6. The interlayer of claim 4, wherein the polyester is polyethylene terephthalate. 7. The interlayer of claim 6, wherein the interlayer comprises two polyethylene terephthalate films. 8. A laminated glazing, comprising:a pair of glass sheets and an interlayer comprising a pair of outer sheets formed from polyvinyl butyral and a reinforcement, which is a grid-like or mesh pattern of yarn arranged in at least two different directions, disposed therebetween, the interlayer having a tensile strength such that the elastic energy needed to deform the interlayer is at least about 80 J/m 2 in all directions. 9. The laminated glazing of claim 8, wherein the glazing is configured and dimensioned as a movable glazing for a vehicle. 10. The laminated glazing of claim 8, wherein the glazing is curved in at least one direction. 11. The laminated glazing of claim 8, wherein the glass sheets have a thickness ranging from about 1 mm to about 3 mm. 12. The laminated glazing of claim 8, wherein at least one of the glass sheets comprises at least two glass sheets. 13. A laminated glazing, comprising:an interlayer comprising a pair of outer sheets formed from polyvinyl butyral and a reinforcement consisting of (1) at least one polyester film having a thickness greater than 70 μm or (2) two polyester films separated by a PVB sheet, disposed therebetween, the interlayer having a tensile strength such that the elastic energy needed to deform the interlayer is at least about 80 J/m 2 in all directions. 14. The laminated glazing of claim 13, wherein the glazing is configured and dimensioned as a movable glazing for a vehicle. 15. The laminated glazing of claim 13, wherein the glazing is curved in at least one direction. 16. The laminated glazing of claim 13, wherein the glass sheets have a thickness ranging from about 1 mm to about 3 mm. 17. The laminated glazing of claim 13, wherein at least one of the glass sheets comprises at least two glass sheets.