JPH0688372B2 - Laminated board manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Industrial Application> The present invention relates to a method for producing a laminated plate comprising at least two layers of a glass plate, a plastic plate and a plastic film, and more particularly to a method for producing a laminated plate having a small optical distortion.

<Prior Art> Conventionally, glass plates, particularly window glass for buildings, glass for automobiles and railway vehicles, showcases, protective glass for paintings, water tanks, and other glass plates that require safety such as shatterproof, tear resistance, and abrasion resistance. It has been proposed to laminate a plurality of glass plates or a plastic film in order to impart impact resistance.

Specifically, as a method of laminating a plastic film on a glass plate, a squeegee method in which a plastic film of 100 μ or less coated with an adhesive is watered using a squeegee, or a plastic film and a glass plate are placed between rubber rollers. A roller system is known. However, these methods are limited to thin films to be laminated, and adhesive layers are also limited to thin ones, and are applied to sheet-like or plate-like laminates or thick adhesive layers. Can not.

Further, a laminated glass laminated with a glass plate and a glass plate, sandwich the uneven film-like adhesive made of polyvinyl butyral between the glass plates, after removing the air in the adhesive layer by roll pressure, etc., in an autoclave A method of heating under pressure is also known. However, this method requires the use of an autoclave, requires a long time for pressurization and heating, and is poor in productivity.

<Purpose of the present invention> The present invention makes it possible to easily and efficiently use a liquid adhesive to produce a laminate having little optical distortion regardless of the thickness of the laminate and not limited to two layers and having three or more layers. It is intended to provide a method for manufacturing.

The optical distortion referred to in the present invention is a general term for the perspective distortion and double image referred to in JIS R 3212 Automotive Safety Glass Test Method.

<Structure of the Invention> In the present invention, when at least two layers selected from a glass plate, a plastic plate and a plastic film are laminated to produce a laminated plate, a delamination of a fiber aggregate is formed at least partially in the periphery of each layer. A terminal spacer provided with an air portion is arranged to form a gap between the layers, a liquid adhesive is supplied to the gap, and after sealing the periphery, air present in the gap is removed by suction, and then the adhesive is removed. A method for producing a laminated plate, which comprises curing.

Further, in the above-mentioned method, before the periphery is sealed, a pressing plate is further laminated on at least one surface of the laminated plate, and the periphery is sealed together with the pressing plate.

The present invention will be described below with reference to the drawings. In the present invention, since the plastic film can be applied almost in the same manner as the plastic plate, in the following description, the plastic plate and the plastic film are generically referred to as the plastic plate unless otherwise specified.

FIG. 1 is a cross-sectional view showing a state in which a terminal spacer 3 is arranged in the periphery between a glass plate 1 and a plastic plate 2, 3 is a terminal spacer, and 4 is an adhesive formed by the terminal spacer. It is a gap.

FIG. 2 is a view showing a sectional structure when the adhesive 5 is supplied to the gap 4. Any method may be adopted to supply the adhesive 5. For example, a method of placing the terminal spacer 3 around the glass plate 1 and supplying a predetermined amount of the adhesive 5 to the place corresponding to the gap 4 and then stacking the plastic plate 2 is performed. A method in which the plates 5 are stacked and then the adhesive 5 is injected into the gap 4 is preferable.

The terminal spacer 3 has a shape-retaining property for defining the thickness of the gap 4, and needs only to have a sealing property on the contact surface with the glass plate 1 or the plastic plate (film) 2, and one having a lower moisture permeability is preferable. preferable. If these characteristics are provided, it is not necessary to specify the material and structure.

In the present invention, as the end spacer 3, an end spacer provided with a deaeration part made of a fiber polymer at least in part is used. A preferable example of the terminal spacer 3 is shown in FIG. 3a. In Fig. 3a, a woven fabric 3-2 is used as a deaeration part in the core material, and the upper and lower parts thereof are formed into a tape shape with an adhesive butyl rubber 3-1. This terminal spacer has a relatively high viscosity of the adhesive,
It is suitable when it is difficult to supply the entire area of The presence of the woven fabric on the core facilitates degassing or removal of air in the gaps due to its selective permeability to allow air to pass through but not the adhesive. The core 3-2 may be not only a woven fabric but also a knitted fabric or a non-woven fabric, and the material forming the 2-1 part is butyl rubber, but the material is not limited to this.

In FIG. 3b, a monofilament having no air permeability is used as the core material 3-3, and the periphery thereof is covered with butyl rubber 3-1. When this terminal spacer is used, deaeration becomes difficult. When deaeration is difficult as described above, as shown in FIG. 4, a part of the terminal spacer 3 at the corner of the laminated plate is cut off, and the thread 9 is inserted as a deaeration part in the gap, and deaeration is performed from here. For example, it is easily degassed through the gaps between the fibers forming the yarn 9, but the adhesive does not pass through. Further, the degassing section is not limited to one location, and a plurality of degassing sections may be provided at locations where degassing is difficult.
Even when using the terminal spacer shown in FIG. A, it can be provided if necessary. The yarn used for the deaeration part may be a natural fiber such as cotton, a synthetic fiber, a simple fiber aggregate, or a cloth. The thickness of the terminal spacer 3, that is, the thickness of the gap 4 is not particularly limited, but is usually 0.1 to 0.8 mm.

In FIG. 5, a holding plate 6 is further stacked on the laminated plate to which the adhesive 5 shown in FIG. 2 is supplied, and the periphery of these is sealed by a sealing material 7 having an intake hole 8, and a vacuum is introduced from the intake hole 8. It is sectional drawing of the state deaerated with a pump.

The use of the holding plate 6 is preferable because it has the effect of making the thickness of the adhesive layer more uniform and improving the uniformity of the obtained laminated plate. In particular, a plastic plate having a low rigidity, particularly a plastic plate having a thickness of 2 mm or less and / or a large area, is difficult to have a flat fiber, and a great effect is obtained when such a plastic plate is used. Although the holding plate 6 can be used on only one side of the laminated plate to obtain a great effect, it may be used on both sides as necessary.

It is not necessary to consider the material of the pressing plate 6 as long as it has rigidity and can maintain the flatness by contacting with the plastic plate or the glass plate. preferable. When a pressing plate is placed on a plastic plate whose flatness is difficult to maintain,
Air is likely to remain partially on the contact surface, and it is difficult to completely remove this residual air. In such a case, if water slide glass is used as the holding plate, the water slide glass can support the plastic plate by the innumerable convex surfaces of the fine polishing surface, and the air remaining on the contact surface can be easily removed to obtain the required flat surface. Easy to get caught. Further, when the adhesive is UV-curable, it can be cured by irradiating it with a mercury lamp or a fluorescent lamp for photochemistry from the side of the glass surface, and from this point also, the glass slide is used as a holding plate. Is preferred.

The sealing material 7 may be any material that can seal the periphery of the laminated plate or the periphery of the laminated plate and the holding plate stacked on the laminated plate at the same time. For example, vinyl chloride tape with an adhesive layer on one side or soft rubber (eg silicone rubber, urethane rubber, etc.)
Tape is used. The sealing material 7 is provided with at least one intake hole 8 for removing air remaining inside the seal (the contact surface between the adhesive layer, the plastic plate or the glass plate and the pressing plate).

FIG. 6 is a cross-sectional view for schematically showing the steps described above, which is formed by arranging the terminal spacers 3 in the periphery between the glass plate 1 and the plastic plate 2 in which the planar fiber is difficult. The adhesive 5 is supplied to the gap 4, the pressing plate 6 is further overlapped, and the periphery of these is sealed by a sealing material 7 provided with an intake hole 8. The periphery of the adhesive 5 and the plastic plate 2 are shown. A space is formed between the holding plate 6 and the holding plate 6, indicating that air remains. When air is removed from the intake hole 8 by a vacuum pump after sealing in this way, residual air is removed and at the same time external pressure is applied to the entire surface to ensure planarity. After degassing in this way, the adhesive is cured. A suction device is used for degassing, and the degree of pressure reduction may be arbitrary, but 50 to 500 mmHg is usually sufficient.

FIG. 7 is a cross-sectional view showing a state after deaeration in a mode in which a pressing plate 6 is superposed on both surfaces of a laminated plate composed of a glass plate 1 and a plastic plate 2.

FIG. 8 is a cross-sectional view showing a laminated plate having a three-layer structure in which a plastic plate is used as an intermediate layer and glass plates are laminated on both sides thereof.
This laminated plate having a three-layer structure has glass with high surface hardness to prevent scratches, and a plastic plate as an intermediate layer can ensure penetration resistance and enhance shape retention. To manufacture this three-layer laminated plate, either assemble it into a three-layer structure and then seal and evacuate the surrounding area, or assemble into a three-layer structure and stack the holding plates on both sides to seal the entire circumference. To degas,
Alternatively, as shown in FIG. 5 or FIG. 7, a glass plate and a plastic plate are laminated in a two-layer structure, deaerated, and the adhesive is cured to produce a two-layer structure laminated plate. It can also be manufactured by further laminating a glass plate on the plate side. According to this method, since the flatness of the plastic plate can be increased in the first step, it is possible to manufacture a laminated plate having a three-layer structure with particularly low optical distortion.

The method of the present invention also includes an embodiment of a laminated plate of a plastic plate and a plastic plate. Since the plastic plate generally lacks rigidity and is difficult to maintain the flatness, a method of stacking the pressing plates on both sides and sealing is preferable in this embodiment. Also,
The aspect of the laminated board of a glass plate and a glass plate is also included. In this case, the holding plate may not be used, but it is preferable to use the holding plate when the glass plate is thin and / or has a large area. Further, two or more laminated plates can be simultaneously manufactured by stacking two or more laminated plates set as shown in FIG. 2 and then sealing, degassing, and curing the adhesive.

The glass plate used in the present invention is generally intended for transparent float glass, but even opaque glass, colored glass, template glass, meshed glass, cotton-containing glass, heat ray reflecting glass, heat ray absorbing glass, etc. Of course, tempered glass obtained by tempering the above glass, semi-tempered glass, chemically tempered glass and the like can also be used.

The plastic plate or the plastic film may be an opaque plastic or a colored plastic, and a film having further functionality such as a heat ray reflection film, a heat ray absorption film, a transparent conductive film, a polarizing film, a light control film is also used. be able to. Polycarbonate resin and thermoplastic polyester resin are mainly used as the material, but MMA resin, AS resin, ABS resin, PVC resin, FRP resin and the like can also be used.

The adhesive is preferably transparent and liquid, for example, a photopolymerization type or a heat polymerization type, and particularly preferably a viscosity of 200 to 5000 centipoise, preferably 400 to 2000 centipoise. Moreover, a colored laminated plate or a colored laminated film can be easily manufactured by coloring the adhesive.

Although the above description has been given of a flat laminated plate, the present invention can be similarly applied to a laminated plate having a curved surface.

<Effects of the Invention> According to the present invention, a laminated plate having a small optical strain is obtained regardless of the thickness of the laminate, and the number of laminated layers is not limited to two and is three or more.
It can be manufactured easily and efficiently, and the effect it produces is exceptional.

<Examples> Examples will be further described below.

Example 1 Float glass having a thickness of 3 mm and a curvature of 5000R (600 mm
X 700 mm), place a 0.6 mm-thick terminal spacer made of butyl rubber tape with woven cloth, supply UV-curable adhesive with a viscosity of 1200 centipoise, and then apply the thickness.
After stacking 0.5mm polycarbonate resin plate (600mm × 700mm), and further stacking 6mm-thick water glass (600mm × 700mm) with the same curvature as the float glass, seal the perimeter of them. Pressure 40mmHg by vacuum pump
Degassed with a fluorescent lamp for photochemical irradiation energy of about 4000
Cured at mJ / cm ² .

The optical distortion of the obtained laminated plate having a two-layer structure is extremely small,
It passed the JIS standard. Further, it had heat resistance at 80 ° C. for 2 hours and did not penetrate even if a 2 kg steel ball was dropped from 10 m.

Example 2 A 0.5 mm thick terminal spacer made of butyl rubber tape with woven cloth was placed around a 3 mm thick flat plate float glass (300 mm × 300 mm), and an ultraviolet curable adhesive having a viscosity of 1600 centipoise was supplied. , 125μ thick polyester film (300mm × 300mm) is placed on top of it, and 6mm thick water-shrink glass (300mm × 300mm) is placed on top of it, and then these areas are sealed and pressure is 20mmHg by vacuum pump. Was degassed with a mercury lamp and cured with irradiation energy of about 3000 mJ / cm ² .

The optical distortion of the obtained laminated plate having a two-layer structure is extremely small,
It passed the JIS standard. Further, it withstood a boiling test of boiling water for 2 hours, and when a 2 kg steel ball was dropped from 4 m, some cracks were formed in the film of the falling ball portion, but the film did not penetrate.

Example 3 A non-breathable double-sided tape having a thickness of 0.4 mm and a width of 6 mm was used as a terminal spacer around the periphery of a flat plate float glass (300 mm × 300 mm) having a thickness of 3 mm, as shown in FIG. 0.5 m
Place with m gaps, insert 20th polyester fiber into these gaps, supply UV curable adhesive with viscosity of 500 centipoise, and 125μ thick polyester film (300mm × 300mm) on it After stacking, and further stacking a 6 mm thick glass slide (300 mm x 300 mm) on top of them, the surroundings are sealed and degassed with a vacuum pump at a pressure of 20 mmHg, and the irradiation energy is about 3000 mJ / cm ² with a mercury lamp. Cured.

The optical distortion of the obtained laminated plate having a two-layer structure is extremely small,
It passed the JIS standard. Further, it withstood a boiling test of boiling water for 2 hours, and when a 2 kg steel ball was dropped from 4 m, some cracks were formed in the film of the falling ball portion, but the film did not penetrate.

[Brief description of drawings]

1, FIG. 2, FIG. 4, FIG. 5, FIG. 6, FIG. 7, and FIG. 8 are sectional views for explaining the method of the present invention.
FIG. 3 is a perspective view of the terminal spacer. 1 is a glass plate, 2 is a plastic plate, 3 is a terminal spacer, 4 is a gap for supplying an adhesive formed by the terminal spacer 3, 5 is an adhesive, 6 is a holding plate, 7 is a sealing material, and 8 is It is an intake hole.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Keijiro Umemoto 1-6-21 Nishishinbashi, Minato-ku, Tokyo Within Teijin Kasei Co., Ltd. (72) Kohei Horimoto 1-6-21 Nishishinbashi, Minato-ku, Tokyo No. Teijin Kasei Co., Ltd. (56) Reference JP-A-59-78956 (JP, A) JP-A-58-208042 (JP, A) JP-B-62-25089 (JP, B2)

Claims (2)

[Claims] 1. When a laminated plate is manufactured by laminating at least two layers selected from a glass plate, a plastic plate and a plastic film, a deaeration part consisting of a fiber aggregate is formed at least partially in the periphery of each layer. Disposing the provided terminal spacers to form a gap between the layers, supplying a liquid adhesive to the gap, sucking and removing air present in the gap after sealing the periphery, and then curing the adhesive. A method for manufacturing a laminated board, comprising: 2. When a laminated plate is manufactured by laminating at least two layers selected from a glass plate, a plastic plate and a plastic film, a deaeration part consisting of a fiber aggregate is formed at least partially in the periphery of each layer. Disposing the provided terminal spacers to form a gap between the layers, further stacking a holding plate on at least one surface thereof, supplying a liquid adhesive to the gap, sealing the periphery together with the holding plate, and then existing in the gap. A method for manufacturing a laminated board, which comprises sucking and removing the air, and then curing the adhesive.