JPH0526359U - Plastic / glass composite board - Google Patents

Abstract

(57) [Summary] [Purpose] High rigidity, excellent penetration resistance and impact resistance,
And to provide a light plastic / glass composite board. [Structure] A transparent hard plate made of a thermoplastic resin having a thickness of 1 to 5 mm, and a glass plate having a thickness of 1 to 3 mm attached to both surfaces of the transparent hard plate with a transparent ultraviolet-curable adhesive agent. 3 to 10 mm plastic-glass composite plate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention relates to a plastic / glass composite plate having high rigidity, excellent penetration resistance, impact resistance, and lightness, and is useful for window glass of railway vehicles, automobiles, buildings, and the like.

[0002]

[Prior Art]

 As window glass for railway cars and window glass for automobiles, it is mandatory to use laminated glass or a tempered glass in which a heat-adhesive soft film such as polyvinyl butyral resin is inserted between two glass plates from the viewpoint of safety. Has been. The usable area of the window glass of a building is determined by the height above the ground and the thickness of the glass. However, in vehicles and automobiles, the weight of glass has been reduced from the standpoint of improving fuel efficiency, energy saving, and environmental pollution, and for buildings, due to problems such as strength examination and various factors such as haddability. The demand for is becoming extremely large. In view of these points, as a measure to reduce the weight of glass, increasing the thickness of the adhesive soft film between the glasses, or as an alternative to the glass, transparent resin plates such as polycarbonate, polymethylmethacrylate, and polyvinyl chloride have been studied. There is.

[0003]

[Problems that the device is trying to solve]

 With the method of thickening the adhesive soft resin film of laminated glass, when the thickness of the resin film is 1 mm or more, it is difficult to form a bubble-free transparent film because bubbles easily enter into the resin film when the resin is applied. However, it is not possible to reduce the weight because the strength becomes weak. When the transparent resin plate is used as a substitute for glass, there are drawbacks such as easy scratching of the surface, scratch resistance, chemical resistance, and low rigidity, and its application range is limited. Although the scratch resistance of the resin surface is considerably improved by providing a hard coat layer of a crosslinkable resin on the surface of the resin plate, the pencil hardness thereof is about 4 to 5H at the most, and it is practically used. Has a limited range of use. Regarding the rigidity, it can be solved by increasing the plate thickness, but depending on the application, the thickness needs to be 2 to 3 times that of glass alone, which is counter to weight reduction and high in cost. I'm not satisfied with it. It is also conceivable that the glass plate and the resin plate are simply laminated with an adhesive, but warpage occurs, the dimensional stability is lacking, the rigidity is not sufficient, and the resin plate on one side is scratch resistant. There are problems such as poor performance. Therefore, an object of the present invention is to provide a plastic / glass composite plate which has high rigidity, excellent penetration resistance and impact resistance, and is lightweight.

[0004]

[Means for solving problems]

 The above object is achieved by the present invention described below. That is, the present invention is characterized in that a glass plate having a thickness of 1 to 3 mm is bonded to both surfaces of a transparent hard plate made of a thermoplastic resin having a thickness of 1 to 5 mm via a transparent ultraviolet-curing adhesive. Is a plastic-glass composite plate having a total thickness of 3 to 10 mm.

[0005]

[Action]

 By attaching a glass plate having a thickness of 1 to 3 mm to both surfaces of a transparent hard plate made of a thermoplastic resin having a thickness of 1 to 5 mm via a transparent ultraviolet-curing adhesive, and setting the total thickness to 3 to 10 mm, It is possible to provide a plastic / glass composite plate having high rigidity, excellent penetration resistance and impact resistance, and being lightweight.

[0006]

[Preferred embodiment]

 Next, the present invention will be described in more detail with reference to preferred embodiments. As the thermoplastic resin for the transparent hard plate used in the present invention, polycarbonate, polymethylmethacrylate, polyvinyl chloride, polystyrene, etc. or a copolymer containing them as a main component can be used, but considering the impact resistance, Polycarbonate and polyvinyl chloride are preferred. The resin plate is extruded to form a transparent plate without bubbles inside. Further, if smoothness of the plate surface is required, it may be polished.

Suitable adhesives to be applied to both sides of the resin plate are UV-curable acrylate monomers and acrylate oligomers that are non-solvent and have 1 to 3 functional groups at the ends, and this adhesive is applied to the resin plate. The resin does not dissolve and whiten when exposed to UV light, and the thermal history during UV irradiation is small, so there is no deformation of the resin plate and no thermal strain in the resin. It is possible to obtain the object of the present invention which is excellent in stability and transparency. The amount of adhesive applied is preferably about 10 to 300 μm. Curing of the adhesive may be carried out by irradiating ultraviolet rays according to a conventional method after laminating glass plates. The glass plates to be laminated on both sides of the resin plate coated with the adhesive are ordinary plate glass, and the glass thickness of the composite plate of glass / hard resin / glass is 1 mm, which is satisfactory in terms of physical properties. In consideration of workability, etc., 2 to 3 mm is preferable, and since the hard resin has a thickness of 1 mm because glass plates are laminated on both sides, it has a large deflection at the time of a falling ball impact, preferably 2 mm or more, In consideration of weight reduction, it is preferable that the thickness of the glass is thicker than that of the glass.

[0008]

【Example】

 Example 1 An acrylate-based UV-curable adhesive and (Lightweld 183, Dyma x Corporation) were applied on both sides of a polycarbonate plate having a width of 610 mm, a length of 610 mm and a thickness of 3 mm, respectively, to a thickness of 100 μm, and applied on this. Glass plates with thicknesses of 1.5 mm and 2 mm are laminated while degassing under vacuum, and ultraviolet rays are radiated from each surface to cure the adhesive, and a composite plate of polycarbonate glass with a thickness of about 6.5 mm is obtained. Obtained. The weight of this composite plate was 23% smaller than that of a glass plate of the same thickness. Based on JIS R-3205, a 1 kg copper ball was dropped from a height of 120 cm onto the obtained composite plate, but the glass on the falling ball side was cracked, but the glass fragments were detached and scattered. However, it was excellent in impact resistance. As a measure of rigidity, the amount of deflection due to its own weight was measured at 900 mm between viewpoints, but the products produced in the same manner as in the practical example had a deflection amount of 1 mm or less, which was almost negligible. For comparison, the polycarbonate plate having a thickness of 7 mm had a self-deflection amount of 13 mm.

[0009]

【effect】

 As described above, in the composite plate of the present invention, since both sides of the hard resin plate are made of glass, there is no problem in scratch resistance, and the composite plate is thinner than the plastic alone and the rigidity is remarkably improved. Further, by using a hard resin plate, the resin layer can be thickened without impairing transparency, and it is possible to obtain a product having excellent dimensional stability and being sufficiently lighter than glass alone. Further, since the hard resin plate itself is excellent in impact resistance, the composite plate has extremely excellent penetration resistance.

[0010]

[Brief description of drawings]

FIG. 1 is a diagram schematically illustrating a cross section of a composite plate of the present invention.

[Explanation of sign]

 1,5 ... Glass plate 2,4 ... Ultraviolet curing adhesive 3 ... Transparent hard resin plate 10 ... Plastic-glass composite plate of the present invention

Claims (1)

[Scope of utility model registration request] 1. A glass plate having a thickness of 1 to 3 mm is bonded to both surfaces of a transparent hard plate made of a thermoplastic resin having a thickness of 1 to 5 mm with a transparent ultraviolet-curing adhesive. Plastic-glass composite plate with a total thickness of 3 to 10 mm.