Automotive window glass

• US 5,336,565 A
• Filed: 07/13/1993
• Issued: 08/09/1994
• Est. Priority Date: 02/28/1991
• Status: Expired due to Term

• Current Assignee: Nippon Sheet Glass Company Limited (Nippon Telegraph and Telephone Corporation)
• Original Assignee: Nippon Sheet Glass Company Limited (Nippon Telegraph and Telephone Corporation)
• Inventors: Nakai, Hidemi, Muromachi, Takashi, Kawaguchi, Jun
• Primary Examiner(s): Turner, A. A.
• Application Number:
  US08/091,469
• Time in Patent Office: 392 Days
• Field of Search: 428/698, 428/432, 428/426, 428/437, 428/913, 428/336, 428/434, 428/433, 428/469, 428/472, 359/359
• US Class Current: 428/432
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: C03C 17/225 Nitrides
• CPC Class Codes: C03C 2217/281 Nitrides
• CPC Class Codes: C03C 2218/154 by sputtering
• CPC Class Codes: Y10T 428/265 1 mil or less
• CPC Class Codes: Y10T 428/3163 Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]

Abstract

In an automotive window glass having a pair transparent sheet glasses that are stuck to each other with a transparent resin film, the inner surface of one of the pair of sheet glasses, which faces the transparent resin film, is coated with a heat-ray intercepting film that is composed of any one of the following chemical formulas whose atomic ratios are defined.

(A) ZrN_x O_y : 0.5≦x≦0.8, and 0.8≦x+y≦1.2

(B) TiN_x O_y : 0.2≦y≦0.8, and 1.4≦x+y≦1.8

(C) CrN_x O_y : 0.1≦y≦0.8, and 1.4≦x+y≦1.8

Claims

1. An automotive window glass comprising a pair of transparent sheet glasses and a transparent resin film with which the pair of sheet glasses are stuck together,

further comprising a second film sandwiched between one of said pair of sheet glasses and said transparent resin film so as to screen the inside of a car from solar radiation with visible-light reflectivity between 7.7 and 9.5, said second film having any of one of the following compositions represented by chemical formulas whose atomic rates are defined;

(A) ZrN_x O_y;

0.5≦

x≦

0.8, and 0.8≦

x+y≦

1.2

(B) TiN_x O_y;

0.2≦

y≦

0.8, and 1.4≦

x+y≦

1.8

(C) CrN_x O_y;

0.1≦

y≦

0.8, and 1.4≦

x+y≦

1.8

2. An automotive window glass according to claim 1 in which said second film has such a thickness as to transmit seventy percent or more of visible light.

3. An automotive window glass according to any one of claims 1 and 2 in which an antenna conductor is provided on the outer surface of the other of said pair of sheet classes, or between the inner surface of said other sheet glass and said transparent resin film.

4. An automotive window glass according to claim 1, wherein said second film has a sheet of resistivity which is more than 1 KΩ

/□

.

5. An automotive window glass according to claim 1, wherein said second film has a thickness between 3 and 15 nm.

6. An automotive window glass according to claim 1, wherein said automotive window glass and a window glass without said second film have differences on the Hunter chromaticity plane on coordinates a and b, Δ

a being between -5 and +5, Δ

b being between -5 and +5.

7. An automotive window glass according to claim 1, wherein said second film has a single layer structure.