JPH07206481A - Production of laminated glass - Google Patents

Abstract

PURPOSE:To prevent unequalness of curing reaction in the peripheral edge part and central part of a laminated plate formed by superposing a glass plate and a synthetic resin plate on each other via a polymerizable adhesive interposed therebetween and to obtain laminated glass having high transparency by covering the entire part of the outside surface of this laminated plate with a heat insulating material and curing the polymerizable adhesive. CONSTITUTION:The whole of the outside surface of the laminated plate formed by superposing the glass plate 1 and the synthetic resin plate 2 on each other via the polymerizable adhesive 3 of a cold curing type interposed therebetween is covered with the heat insulating material 4 and the polymerizable adhesive is cured. The heat insulating material 4 is exemplified by a polyethylene foam, polyurethane foam, rubber sponge, etc., of an expansion magnification of, for example, about 30 times. Its thickness is preferably about 10 to 50mm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a laminated plate of a glass plate and a synthetic resin plate, which are integrally bonded to each other with a room temperature-curing polymerization adhesive interposed therebetween to provide impact resistance, penetration resistance, and soundproof performance. The present invention relates to a method for manufacturing a laminated glass, which has improved heat insulation performance and dew condensation prevention performance, and is also lighter in weight and improved in safety performance.

[0002]

2. Description of the Related Art Conventionally, as a typical example of a method for producing a laminated glass, a method of sandwiching a film of polyvinyl butyral or the like between a glass plate and a synthetic resin plate and applying pressure to heat and adhering them is known.

There is also known a method in which a room temperature curable resin or an ultraviolet curable resin is interposed between a glass plate and a synthetic resin plate, and the resin is cured and bonded.

[0004]

However, the method of adhering using a film such as polyvinyl butyral requires a large pressurizing and heating device and requires an extremely complicated work process. It has major problems in cost and work.

Also in the method of adhering using a curable resin, the progress of the curing reaction is different between the central portion and the peripheral portion and the end portion of the laminated plate, and the peripheral portion and the end portion where the reaction heat is hard to accumulate are different from each other. The reaction tends to be delayed compared to the central part, and due to volume contraction accompanying the curing reaction, bubbles, peeling phenomena, etc. (hereinafter referred to as bubbles) may occur at the interface between the adhesive layer and the glass plate or the synthetic resin plate in this part. A non-uniform layer is likely to occur. In particular, as the size of the laminated plate increases, bubbles and the like tend to become more prominent, and further, cracks and fine cracks (crazes) (hereinafter referred to as cracks) occur.

[0006] On the other hand, there are some known methods for improving these problems. For example, JP-A-4-338.
In the 12th report, after encapsulating the room temperature curable resin containing acrylic acid ester as a main component between the plate materials of the laminated plate, the peripheral part and the end part are heated so that the temperature difference from the central part is 5 ° C or more. , A method of starting the curing reaction from the peripheral portion and the end portion to solve the problem is described.

However, even in this method, the curing reaction time varies depending on the position of the laminated plate, and it is difficult to form a uniform adhesive layer. Especially, as the size of the laminated plate becomes larger, bubbles and cracks are generated. Has a drawback that it is likely to occur.

The present invention has been made in view of such conventional problems, and in the production of laminated glass using a room temperature curable polymerization adhesive, the glass plate and the synthetic resin are interposed with the polymerization adhesive interposed. It is an object of the present invention to prevent uneven curing reaction in the peripheral portion and the central portion of a laminated plate in which plates are stacked.

[0009]

In order to solve the above-mentioned problems, the present invention provides all of the outer surfaces of laminated plates which are laminated by interposing a room temperature-curable polymerization adhesive between a glass plate and a synthetic resin plate. This is a method for producing a laminated glass, which is characterized by covering with a heat insulating material and curing the polymerization adhesive.

The present invention will be described in more detail below with reference to the drawings.

FIG. 1 shows a laminated plate obtained by laminating a glass plate 1 and a synthetic resin plate 2 using a bonding material 3 and stacking them.

The glass plate 1 is, for example, ordinary plate glass, float plate glass, tempered glass, meshed glass, etc., and has a length of 1 cm.
-5 m, width 1 cm-2 m, thickness 1-10 mm is used. The synthetic resin plate 2 is, for example, a polymethylmethacrylate plate (hereinafter referred to as an acrylic plate), a resin plate containing polymethylmethacrylate as a main component, a multilayer resin plate containing polymethylmethacrylate in the surface layer, and the like. A glass plate having the same length as the glass plate 1 and a thickness of about 1 to 50 mm is usually used. The glass plate 1 and the synthetic resin plate 2 may be laminated one by one, or may be laminated by laminating one or both of them.

The bonding material 3 is, for example, a transparent acrylic tape type one side of which is covered with a release film, and generally has a width of 1 to 20 mm and a thickness of 0.5 to 5.0 mm. It also serves as a spacer for keeping the thickness of the adhesive layer 6 (see FIG. 3) constant and as a sealing material for sealing the periphery of the adhesive layer 6.

The bonding material 3 is attached to the entire peripheral portion of one of the glass plate 1 and the synthetic resin plate 2 with the release film-free surface.

Thereafter, the other plate material is laminated, and the peeling film of the bonding material attached to the edges of the three sides while leaving one side is removed, and the peripheral edges of the glass plate 1 and the synthetic resin plate 2 are bonded. . Thereby, as shown in FIG. 3, the adhesive layer 6 is formed between the glass plate 1 and the synthetic resin plate 2.

As shown in FIG. 2, one side of the bonding material 3 on which the release film is left is an injection portion of the adhesive 8.
Since the volume of the adhesive 8 shrinks during the curing reaction, it is preferable that the amount of injection is at least the volume of the adhesive layer 6.
For this reason, when the size of the laminated plate is large, it is preferable to insert a removable spacer 9 near the injection port in advance to widen and secure a space portion necessary for the adhesive layer 6. Further, in order to reduce the residual air in the adhesive layer 6 after the injection of the adhesive agent 8 and reduce the cost, an air venting tube 7 such as an injection needle is previously attached to the end portion.
Is preferably attached.

Next, an adhesive 8 containing a certain amount of a catalyst was added,
As shown in FIG. 2, a fixed amount of the bonding material 3 is injected from one side of the laminated plate on which the release film is left.

The amount to be injected is represented by the following equation (1).

V = a × (1 + b) × 1.05 (1)

(V in the formula is the injection amount of the adhesive 8, a is the volume of the adhesive layer 6 of the laminate, and b is the volume shrinkage ratio of the adhesive 8)

When injecting the adhesive 8, the laminated plate is placed at an angle of 4
The operation becomes easier if it is tilted about 5 °. When the dimensions of the laminate are small (generally, the length and width are 30 cm or less)
However, since it is difficult to secure the space portion necessary for the injection amount of the adhesive 8 in the adhesive layer 6 with the spacer 9, in that case, it is preferable to press-fit by using the air bleeding tube 7.

After the adhesive 8 is injected, the spacer 9 on the injection port side and the release film of the bonding material 3 are removed, and the side edges of the laminate are also bonded. With this, all the peripheral portions of the laminated plates are joined.

Further, the air inside the adhesive layer 6 is extracted from the air bleeder tube 7 at the end, and after confirming that the air has been completely evacuated, the air bleeder tube 7 is removed and the trace is pressed with a clip or the like. To join.

As the room temperature curing type polymerization adhesive, for example, a monomer solution containing a methyl methacrylate monomer, a butyl acrylate monomer or the like is used. For 100 parts by weight of these monomers, a catalyst such as an organic or inorganic type is used. 0.1 to 5.0 parts by weight of a reducing agent and 0.1 to 0.1 parts by weight of an accelerator such as an organic acid salt-based or metal complex-based of various metals.
A mixture of 3.0 parts by weight and 0.1 to 1.0 parts by weight of an organic or inorganic peroxide polymerization initiator can be used.

After that, as shown in FIG. 3, the heat insulating material 4 having excellent heat retention and a smooth surface covers the entire outer surface of the laminated plate. In this case, it is preferable that the heat insulating material 4 be closely attached to the laminated plate so that there is as little space as possible.

The heat insulating material 4 on the four side surfaces is the heat insulating material 4 on the upper side.
The work is easy if the laminated plate and the heat insulating plate 4 are fixed to each other with an adhesive tape or the like before they are placed on each other. On the upper heat insulating material 4, slightly longer than the vertical and horizontal dimensions of the laminated plate (for example, 10c
m), a glass plate or a synthetic resin plate having a smooth surface and a certain weight (for example, about 50 kg) is placed as the weight 5 to enhance the adhesion between the upper heat insulating material 4 and the laminated plate. . And keep the horizontal state as it is, usually 2
Let stand for about one day in a room temperature environment of 0 to 30 ° C.

The heat insulating material 4 is made of, for example, a polyethylene foam type, a polyurethane foam type, a rubber sponge type having a foaming ratio of about 30 times, which is light and excellent in heat retention.
The size of the top and bottom is preferably at least 10% or more larger than the vertical and horizontal dimensions of the laminate, and the thickness is 1
It is preferably about 0 mm to 50 mm. The four side parts are the same as the length or width of the laminate, and the width is 10
It is preferable that the thickness is about 50 mm, and the thickness is the same as the thickness of the entire laminated plate.

Since the outer surface of the laminated plate is entirely covered with the heat insulating material 4 as described above, the heat of reaction generated by the curing reaction is prevented from being radiated to the outside. Since the temperature difference between the central part and the central part is reduced and the overall temperature difference is reduced, the curing reaction is likely to proceed uniformly, and the adhesive layer 6 becomes a uniform layer without generation of bubbles or cracks. High quality laminated glass can be manufactured relatively easily.

Moreover, according to this method, the vertical direction of the laminated plate,
It is extremely practical that it is possible to manufacture a large amount of laminated glass at a time if the laminated plate and the heat insulating material 4 are alternately stacked in multiple layers without being restricted by the lateral and thickness dimensions. Highly effective effect can be obtained.

[0030]

EXAMPLES The present invention will be described below with reference to examples.

Example 1 A float plate glass having a length of 1 m, a width of 1 m, and a thickness of 3 mm, an acrylic plate having a length and width of 10 mm and having the same dimensions as the glass, and a transparent acrylic resin having a width of 6 mm and a thickness of 1 mm. The peripheral portions were joined with a joining material to form a laminated plate. An adhesive containing the adhesive material calculated according to the formula (1) and a catalyst amount corresponding to the adhesive material was injected into the laminated plate. As an adhesive, 100 parts by weight of a monomer solution composed of a methyl methacrylate monomer and a butyl acrylate monomer, 1.0 part by weight of an organic reducing agent as a catalyst, 0.75 part by weight of an organometallic complex accelerator, and an organic peroxide. 0.3 parts by weight of an oxide-based polymerization initiator was added.

Thereafter, residual air in the adhesive layer was completely extracted, and a polyethylene foam heat insulating material having a foaming ratio of 30 times was used to form 1.2 mm in length and width on the upper and lower sides of the laminated plate, and a thickness of 15 m.
m, 1.0m long and 15m wide on four sides
m, the thickness of 14 mm was used to completely cover and tightly adhere to each other, and kept in a horizontal state and allowed to stand overnight in a room temperature environment of 22 to 28 ° C.

As a result, the obtained laminated glass of the float plate glass and the acrylic plate was of high transparency and good quality in which bubbles and cracks were not observed at all.

Example 2 The basic method of implementation is the same as that of Example 1, but the structure of the laminate was changed as shown in FIG.

That is, in the center, the height and width are 30 cm, and the thickness is 1
A 0 mm acrylic plate is installed, and the top and bottom are vertically and horizontally sandwiched by ordinary plate glass with the same dimensions as the acrylic plate and a thickness of 3 mm, and a width of 6
The peripheral portions were joined by a transparent acrylic joining material having a thickness of 1 mm and a thickness of 1 mm.

After that, the work was carried out in the same manner as described in Example 1.

As a result, the obtained laminated glass of the ordinary plate glass and the acrylic plate showed no generation of bubbles or cracks on both sides, and it had the same thickness as that of the laminated glass. Compared to the laminated glass, the weight was reduced to about 1/3 and the quality was high with high transparency.

[0038]

EFFECTS OF THE INVENTION According to the present invention, due to shrinkage and the like caused by the curing reaction of the adhesive in the laminated plate, bubbles and peeling phenomenon generated at the interface between the adhesive layer and the glass plate or the synthetic resin plate can be prevented. It is relatively easy to produce a high-quality and lightweight laminated glass having high transparency, with no generation of a uniform layer and no cracks or fine cracks (crazes).

Further, according to this method, the length, width and thickness of the laminated plate are hardly restricted, and if the laminated plate and the heat insulating material are alternately stacked in a number of layers, a large amount can be obtained at a time. A highly practical and excellent effect that a laminated plate (laminated glass) can be manufactured can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a laminated plate in which a glass plate and a synthetic resin plate are stacked with a bonding material interposed therebetween.

FIG. 2 is a perspective view showing an operation of injecting an adhesive.

FIG. 3 is a cross-sectional view showing a curing reaction of the adhesive.

FIG. 4 is a sectional view of a laminated board of Example 2.

[Explanation of symbols]

 1 Glass Plate 2 Synthetic Resin Plate 3 Bonding Material 4 Heat Insulation Material 5 Weight 6 Adhesive Layer 7 Air Venting Tube 8 Adhesive 9 Spacer

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[Procedure amendment]

[Submission date] January 20, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

However, also in this method, we have want difference occurs between the curing reaction time depending on the position of the laminate,
It has a drawback that it is difficult to form a uniform adhesive layer, and bubbles and cracks are more likely to occur as the size of the laminated plate increases.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

Next, an adhesive 8 containing a certain amount of a catalyst
The, as shown in FIG. 2, a predetermined amount injected from one side of the laminate leaving the release film of the bonding material 3.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

Since the outer surface of the laminated plate is entirely covered with the heat insulating material 4 in this way, the heat of reaction generated by the curing reaction is prevented from being radiated to the outside. for temperature differential across the temperature difference is narrowed between the parts and the central portion is reduced, the curing reaction tends to progress uniformly, the adhesive layer 6 becomes not uniform layer of occurrence of air bubbles and cracks, transparency It is possible to relatively easily manufacture a high-quality laminated glass of high quality.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

[Correction method] Change

[Correction content]

After that, residual air in the adhesive layer was completely extracted, and a polyethylene foam heat insulating material having a foaming ratio of 30 times was used to form 1.2 m in length and width and 15 m in thickness above and below the laminated plate.
m, 1.0m long and 15m wide on four sides
m, the thickness of 14 mm was used to completely cover and tightly adhere to each other, and kept in a horizontal state and allowed to stand overnight in a room temperature environment of 22 to 28 ° C.

Claims (1)

[Claims] 1. A polymerization adhesive is cured by covering the entire outer surface of a laminated plate with a room temperature curing type polymerization adhesive interposed between a glass plate and a synthetic resin plate with a heat insulating material. Method for producing laminated glass.