Laminated glass

Patent metadata

Field	Value
Publication number	US-12022580-B2
Application number	US-201816609997-A
Country	US
Kind code	B2
Filing date	May 1, 2018
Priority date	May 2, 2017
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

Laminated glass includes: an outer glass plate having a first side and a second side; an inner glass plate that is arranged opposing the outer glass plate and has substantially the same shape as a shape of the outer glass plate; and an intermediate layer arranged between the outer and the inner glass, wherein the intermediate layer has a heat-generating layer including: a first bus bar that extends along an end portion closer to the first side; a second bus bar that extends along an end portion closer to the second side; and a plurality of heating lines arranged so as to connect the first bus bar and the second bus bar to each other, and when a predetermined voltage is applied between the first and second bus bars, an amount of heat generated per unit length of each of the heating lines is 2.0 W/m or less.

First claim

The invention claimed is:

1. A laminated glass comprising:
an outer glass plate having a first side and a second side opposing the first side;
an inner glass plate that is arranged opposing the outer glass plate and has the same shape as the outer glass plate shape; and
an intermediate layer arranged between the outer glass plate and the inner glass plate, wherein
the intermediate layer has a heat-generating layer including:
a first bus bar that at least partially extends along an end portion closer to the first side;
a second bus bar that at least partially extends along an end portion closer to the second side; and
a plurality of heating lines arranged so as to connect the first bus bar and the second bus bar to each other,

the intermediate layer comprises a first adhesion layer and a second adhesion layer,
sandwiching the heat-generating layer,
the thickness of the second adhesion layer is 0.05 to 0.4 mm,
the thickness of the first and second bus bar is 3 to 20 μm, and
each of the heating lines has an amount of heat generated per unit length thereof of 2.0 W/m or less when a predetermined voltage is applied between the first and second bus bars.

2. The laminated glass according to claim 1 , wherein the predetermined voltage is 400 V or less.

3. The laminated glass according to claim 1 , wherein the amount of heat generated per unit length of each of the heating lines is 1.5 W/m or more and 2.0 W/m or less.

4. The laminated glass according to claim 1 , wherein the heating lines are not in contact with any of the outer glass plate and the inner glass plate.

5. The laminated glass according to claim 1 , wherein
the largest value of an amount of heat generated per unit area of the intermediate layer when the voltage is applied is 400 W/m2 or more,
the plurality of heating lines are arranged in parallel, and
a distance between adjacent ones of the heating lines is 0.5 to 4.0 mm.

6. The laminated glass according to claim 1 , wherein resistance of each of the heating lines is 30Ω or more.

7. The laminated glass according to claim 6 , wherein a cross-sectional area of each of the heating lines is 200 μm 2 or less.

8. The laminated glass according to claim 7 , wherein a line width of each of the heating lines is 22 μm or less.

9. The laminated glass according to claim 6 , wherein a length of each of the heating lines between the two bus bars is greater than or equal to a distance between the first bus bar and the second bus bar.

10. The laminated glass according to claim 9 , wherein at least one of the plurality of heating lines has, between the first bus bar and the second bus bar, at least one fold-back portion at which a direction in which the heating line extends is changed.

11. The laminated glass according to claim 9 , further comprising:
at least one relay bus bar arranged along an end portion closer to the first side or the second side, at a position different from the first bus bar and the second bus bar,
wherein the plurality of heating lines are connected from the first bus bar via the at least one relay bus bar to the second bus bar.

12. The laminated glass according to claim 6 , wherein
at least some of the heating lines are formed to have a wave shape, and
an actual length of the heating lines having the wave shape relative to a length between two ends of the heating lines on the heat-generating layer is 103% or more.

13. The laminated glass according to claim 6 , wherein the heating lines are formed to have a sine wave shape, and an amplitude of the sine wave is 3 mm or more.

14. The laminated glass according to claim 6 , wherein electric resistivity of the heating lines is 3×10 −8 Ωm or less.

15. The laminated glass according to claim 14 , wherein the heating lines are made of copper.

16. The laminated glass according to claim 1 , wherein at least a portion of the first and second bus bars extends along a peripheral edge of the glass plates.

17. The laminated glass according to claim 16 , wherein a width of each of the first and second bus bars is 10 mm or less.

Assignees

• Pilkington Group Ltd
• Nippon Sheet Glass Co Ltd

Inventors

• Mellor Leigh
• Chamberlain Mark A
• Siddons Graham
• Ogawa Ryohei
• Chiba Kazuki
• Ogawa Hisashi
• Yamada Kentaro
• Sakamoto Takumitsu

Classifications

• H05B2203/016

  Heaters using particular connecting means · CPC title

• H05B2203/011

  Heaters using laterally extending conductive material as connecting means · CPC title

• H05B2203/002

  Heaters using a particular layout for the resistive material or resistive elements · CPC title

• B60S1/026

  using electrical means · CPC title

• B60J1/002

  with means for clear vision, e.g. anti-frost or defog panes, rain shields (window heating in H05B3/84, H05B3/86) · CPC title