Laminated glass, and method for producing same
First Claim
Patent Images
1. A laminated glass comprising a first glass substrate, a first adhesive layer, a heat reflective film, a second adhesive layer and a second glass substrate, laminated in this order,wherein the heat reflective film comprises a resin film having a thermal shrinkage in a direction that a thermal shrinkage becomes maximum, of 0.5% or more and 3% or less and a thermal shrinkage in a direction orthogonal to the direction of 0.1% or more and 2% or less, and a heat reflective coating formed on the resin film;
- the first adhesive layer and the second adhesive layer comprise a polyvinyl butyral film having a thermal shrinkage in a direction that a thermal shrinkage becomes maximum, of 0.5% or more and 3% or less and a thermal shrinkage in a direction orthogonal to the direction of −
2.5% or more and −
0.5% or less; and
the direction that a thermal shrinkage becomes maximum, of the resin film and the direction that a thermal shrinkage becomes maximum, of the polyvinyl butyral film are orthogonal to each other;
provided that the thermal shrinkage of the resin film is a thermal shrinkage when the resin film is maintained at 150°
C. for 30 minutes, and the thermal shrinkage of the polyvinyl butyral film is a thermal shrinkage when the polyvinyl butyral film is maintained at 60°
C. for 30 minutes.
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Abstract
The present invention relates to a laminated glass including a first glass substrate, a first adhesive layer, a heat reflective film, a second adhesive layer and a second glass substrate, laminated in this order, in which the heat reflective film includes a resin film having specific thermal shrinkages in a direction that a thermal shrinkage becomes maximum and in a direction orthogonal to the direction, and a heat reflective coating formed on the resin film; the first adhesive layer and the second adhesive layer include a polyvinyl butyral film having thermal shrinkages in a direction that a thermal shrinkage becomes maximum and in a direction orthogonal to the direction; and the direction that a thermal shrinkage becomes maximum, of the resin film and the direction that a thermal shrinkage becomes maximum, of the polyvinyl butyral film are orthogonal to each other.
3 Citations
11 Claims
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1. A laminated glass comprising a first glass substrate, a first adhesive layer, a heat reflective film, a second adhesive layer and a second glass substrate, laminated in this order,
wherein the heat reflective film comprises a resin film having a thermal shrinkage in a direction that a thermal shrinkage becomes maximum, of 0.5% or more and 3% or less and a thermal shrinkage in a direction orthogonal to the direction of 0.1% or more and 2% or less, and a heat reflective coating formed on the resin film; -
the first adhesive layer and the second adhesive layer comprise a polyvinyl butyral film having a thermal shrinkage in a direction that a thermal shrinkage becomes maximum, of 0.5% or more and 3% or less and a thermal shrinkage in a direction orthogonal to the direction of −
2.5% or more and −
0.5% or less; andthe direction that a thermal shrinkage becomes maximum, of the resin film and the direction that a thermal shrinkage becomes maximum, of the polyvinyl butyral film are orthogonal to each other; provided that the thermal shrinkage of the resin film is a thermal shrinkage when the resin film is maintained at 150°
C. for 30 minutes, and the thermal shrinkage of the polyvinyl butyral film is a thermal shrinkage when the polyvinyl butyral film is maintained at 60°
C. for 30 minutes. - View Dependent Claims (2, 3, 4)
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5. A method for manufacturing a laminated glass, the method comprising:
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an intermediate production step of overlaying first and second polyvinyl butyral films on both surfaces of a heat reflective film, followed by heating and pressuring, thereby obtaining an intermediate; and a pressing step of overlaying first and second glass substrates on both surfaces of the intermediate, followed by heating and pressuring, thereby obtaining a laminated glass, wherein the heat reflective film comprises a resin film having a thermal shrinkage in a direction that a thermal shrinkage becomes maximum, of 0.5% or more and 3% or less and a thermal shrinkage in a direction orthogonal to the direction of 0.1% or more and 2% or less, and a heat reflective coating formed on the resin film; the first and second polyvinyl butyral films have a thermal shrinkage in a direction that a thermal shrinkage becomes maximum, of 0.5% or more and 3% or less and a thermal shrinkage in a direction orthogonal to the direction of −
2.5% or more and −
0.5% or less; andin the intermediate production step, the heat reflective film and the first and second polyvinyl butyral films are overlaid such that the direction that a thermal shrinkage becomes maximum, of the resin film and the direction that a thermal shrinkage becomes maximum, of the first and second polyvinyl butyral films are orthogonal to each other; provided that the thermal shrinkage of the resin film is a thermal shrinkage when the resin film is maintained at 150°
C. for 30 minutes, and the thermal shrinkage of the polyvinyl butyral film is a thermal shrinkage when the polyvinyl butyral film is maintained at 60°
C. for 30 minutes. - View Dependent Claims (6, 7, 8)
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9. A method for manufacturing a laminated glass, the method comprising:
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a lamination step of overlaying a first glass substrate, a first polyvinyl butyral film, a heat reflective film, a second polyvinyl butyral film and a second glass substrate in this order to obtain an unpressed laminated glass; and a pressing step of heating and pressuring the unpressed laminated glass to obtain a laminated glass; wherein the heat reflective film comprises a resin film having a thermal shrinkage in a direction that a thermal shrinkage becomes maximum, of 0.5% or more and 3% or less and a thermal shrinkage in a direction orthogonal to the direction of 0.1% or more and 2% or less, and a heat reflective coating formed on the resin film; the first and second polyvinyl butyral films have a thermal shrinkage in a direction that a thermal shrinkage becomes maximum, of 0.5% or more and 3% or less and a thermal shrinkage in a direction orthogonal to the direction of −
2.5% or more and −
0.5% or less; andin the lamination step, the heat reflective film and the first and second polyvinyl butyral films are overlaid such that the direction that a thermal shrinkage becomes maximum, of the resin film and the direction that a thermal shrinkage becomes maximum, of the first and second polyvinyl butyral films are orthogonal to each other; provided that the thermal shrinkage of the resin film is a thermal shrinkage when the resin film is maintained at 150°
C. for 30 minutes, and the thermal shrinkage of the polyvinyl butyral film is a thermal shrinkage when the polyvinyl butyral film is maintained at 60°
C. for 30 minutes. - View Dependent Claims (10, 11)
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Specification
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Current AssigneeAGC, Inc.
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Original AssigneeAsahi Glass Company, Limited (AGC, Inc.)
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InventorsHino, Yuichi
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Primary Examiner(s)Nakarani, D. S.
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Application NumberUS13/531,855Publication NumberTime in Patent Office211 DaysField of Search156/103, 156/106, 428/332, 428/336, 428/436, 428/437US Class Current428/332CPC Class CodesB32B 17/10005 laminated safety glass or g...B32B 17/10036 comprising two outer glass ...B32B 17/10174 Coatings of a metallic or d...B32B 17/10761 containing vinyl acetalB32B 17/10871 in combination with particu...B32B 2367/00 Polyesters, e.g. PET, i.e. ...Y10T 428/26 Web or sheet containing str...Y10T 428/265 1 mil or lessY10T 428/269 including synthetic resin o...Y10T 428/31616 Next to polyester [e.g., al...Y10T 428/31627 Next to aldehyde or ketone ...Y10T 428/3163 Next to acetal of polymeriz...
