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Laminated glass and automobile window
| Details |
Inventors: Yoshizawa, Hideo;
Assignee: Nippon Sheet Glass Co., Ltd. (Osaka, JP)
Primary Examiner: Nakarani; D. S.
Assistant Examiner:
Attorney, Agent or Firm: Merchant & Gould P.C.
The force, by which the glass sheets of a laminated glass push onto each other, is applied to the edges of the laminated glass to prevent the delamination of the laminated glass caused by moisture penetrating or diffusing from these edges into the intermediate film. A pair of glass sheets having different curvatures, in which if the pair of glass sheets are laid on each other, aligning their edges, their central portions are apart from each other and do not adhere to each other, and in which if bent, their surfaces adhere to each other, are bonded with a PVB film, while being bent so that their surfaces adhere to each other to form a laminated glass. At the edges of the laminated glass, in the portion where the glass sheets try to regain their original shapes to push onto each other through the intermediate film, the delamination of the glass sheets is inhibited. |
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DETAILED DESCRIPTION In the light of the above problems, it is an object of the present invention to provide a laminated glass that is adapted to inhibit the delamination caused by the penetration of moisture from its edges and does not cause a new problem from a viewpoint of appearance or the like, and an automobile window comprising the same.
In order to achieve the above object, an embodiment of the laminated glass of the present invention comprises a pair of glass sheets having different cross-sectional shapes.
The glass sheets are bonded with an intermediate film while being deformed in such a manner that surfaces of the glass sheets adhere to each other so that the glass sheets push onto each other through the intermediate film in a region including at least a part of the edges of the glass sheets.
According to such a laminated glass, the delamination of the glass sheets at the edge of the laminated glass is inhibited even if the adhesive strength of the intermediate film is decreased by the penetration of moisture because the force by which the glass sheets push onto each other acts on the edge of the laminated glass.
The edge of the glass, where the force by which the glass sheets push onto each other is applied, may be the entire edges of the laminated glass (that is, the entire periphery of the laminated glass) or a part of the edges.
However, it is preferable that such an edge includes at least an edge that can be exposed to the air in use.
Also, the laminated glass can be adapted to inhibit the delamination of the glass sheets without using an edge protective material such as a gasket, provides excellent appearance, and does not require a new member or material which increases the manufacturing cost.
Another embodiment of the laminated glass of the present invention is produced by bonding the surfaces of glass sheets are that are not parallel to each other with an intermediate film.
When the glass sheets are superimposed on each other without the intermediate film so that the surfaces to be bonded face each other, the surfaces of the glass sheet are separate from each other in at least a part of the surfaces in such a range that the surfaces adhere to each other when at least one of the glass sheets is elastically deformed
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Manufacturing Materials 
