JPH0791095B2 - Laminating body crimping device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-bonding device for a laminated body using a rubber bag system, and more particularly, to efficiently exhaust air existing between an intermediate layer and a transparent plate when manufacturing laminated glass. The present invention relates to a laminated body crimping device.

[0002]

2. Description of the Related Art A plurality of transparent plates such as an inorganic glass plate or an organic glass plate with an interlayer film made of an adhesive synthetic resin sandwiched between them is known as a laminated glass, which is a window of a traffic vehicle. Widely used for glass or window glass for construction. Such a laminated glass is manufactured by pre-compressing a laminated body in which a pair of transparent plates are superposed with an intermediate film sandwiched therebetween, and then permanently adhering them. As a method for pre-pressing the laminated body, there are a method of passing the laminated body between nipper rolls and a method of vacuum decompression. The method using vacuum decompression is generally called vacuum matching, and is classified into a gasket method in which the periphery of the laminated body is surrounded by a rubber tube and a rubber bag method in which the entire laminated body is housed in a rubber bag.

The vacuum adjustment of the rubber bag system will be described with reference to FIG. 7. First, the intermediate film 22 is provided between the pair of transparent plates 21, 21.
The laminated body 20 sandwiching the above is inserted into the rubber bag 30. Then, the inside of the rubber bag 30 is deaerated to a predetermined vacuum pressure, and the laminated body 20 in the rubber bag 30 is heated while maintaining this state. Rubber bag
The air existing between the transparent plate 20 and the intermediate film 22 is removed by the vacuum decompression inside 30. Further, due to the pressure difference between the inside and the outside of the bag body 30 due to this vacuum decompression, the laminated body 30 receives a pressure load from the outside, and is heated in this state, so that the transparent plate 21,
21 is pre-pressed via the intermediate film 22. The laminated body that has undergone the preliminary pressure bonding is sent to the main bonding step, where it is put into an autoclave and subjected to a high temperature and high pressure treatment to be a laminated glass.

[0004]

In the vacuum adjustment by the conventional rubber bag method as described above, when the unevenness formed on the surface of the intermediate film 22 of the laminate 20 is rough or the inside of the rubber bag 30 is depressurized to a high vacuum. In this case, the air existing between the transparent plate 21 and the intermediate film 22 is sufficiently removed. However, when the roughness of the irregularities formed on the surface of the intermediate film 20 is small, or when the degree of vacuum in the rubber bag 30 is relatively low, the air existing between the transparent plate 21 and the intermediate film 22 is Since it is hard to come off, the peripheral portion of the laminated body 20 is first pressure-bonded while remaining in the central portion of the laminated body 20,
A so-called peripheral seal may occur. When this peripheral sealing occurs, the laminated body 20 after pre-compression bonding is put in an autoclave and pressure-bonded under high temperature and high pressure, and bubbles may remain in the product after the main adhesion, or bubbles may appear during use of the product, which causes quality deterioration. .

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to cause a peripheral seal even when the unevenness formed on the surface is not rough or when the degree of vacuum of the bag is low. It is another object of the present invention to provide a pressure-bonding device for a laminated body that can reliably press-bond the laminated body.

[0006]

SUMMARY OF THE INVENTION A laminated body crimping device of the present invention crimps a laminated body composed of an intermediate film made of synthetic resin and transparent plates disposed on both side surfaces of the intermediate film. A pressure-bonding device for a laminate, which discharges gas that may exist between an intermediate film of the laminate and a transparent plate by heating the laminate, and the interior of the laminate is accommodated. A bag body capable of crimping the laminate by being deaerated, and a pair of parallel holding bodies provided with adjustable intervals on the outer surface in the crimping direction of the laminate housed in the bag body, And a switching means capable of switching between a state in which the pair of holding bodies are fixed with a distance between the pair of holding bodies being equal to or larger than the thickness dimension of the laminated body and a state in which the fixing is released by an operation from outside the bag body. , Which achieves the above-mentioned object.

[0007]

When the laminated body is arranged between the pair of holding bodies with a wide space kept between the pair of holding bodies and the laminated body is accommodated in the bag body and the inside of the bag body is vacuum-depressurized, the peripheral portion of the laminated body is Since the inside of the bag can be decompressed without the pressure load from the bag acting, the gas that may exist between the interlayer film and the transparent plate of the stack can be discharged from the surroundings of the stack to the outside without any trouble. You can When the switching means is switched after the stack has been sufficiently degassed, the pair of holders receives a compressive load from the bag, so that the distance between the holders becomes narrower, and as a result, the stack becomes a bag. The body is pre-compressed to a predetermined strength by receiving a predetermined pressure load from the body.

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

As shown in FIGS. 1 to 3, the pressure-bonding device for a laminated body of the present invention includes a bag body 30 to which the laminated body 20 can be crimped, and a state in which the laminated body 20 is housed in the bag body 30. And a holder 10 for

The laminated body 20 is composed of two transparent plates 21 made of transparent inorganic glass, organic glass, plastic plates, or the like.
The interlayer film 22 is sandwiched between 21. Intermediate film 22
Is formed of a thermoplastic resin having an adhesive property, and both surfaces thereof are provided with fine irregularities so as to prevent the adhesion between the films and the air existing between the intermediate layer 22 and the transparent plate 21 to be easily removed. Has been formed.

The holder 10 is a pair of holders 11 and 12 arranged facing each other in a horizontal state so that the laminated body 20 is accommodated therein.
And four arms 13 and 13 for connecting both holding bodies 11 and 12 and operating the upper holding body 11 so that the distance d between them can be changed.
, And a chain 14 as a switching means for connecting the holding bodies 11 and 12 and fixing the upper holding body 11 so that the distance d between them becomes a predetermined value.

The upper holding body 11 is constructed by providing a protective sheet 11b on the lower surface of a main body 11a made of a metal plate such as steel or aluminum having a plane sufficiently wider than the plane shape of the laminated body 20. . The protective sheet 11b is for preventing damage to the laminated body 20 caused by a difference in thermal expansion between the holding plate 11 and the upper surface of the laminated body 20, and is made of a material such as rubber, silicon rubber, or Teflon. Formed from.
As shown in FIG. 1, the holder 11 is formed in a lattice shape having a large number of square holes for weight reduction. Lower holder 12
Is a structure in which the upper holding body 11 is turned upside down, and is formed by providing a protective sheet 12b on the upper surface of the main body 12a.

The four arms 13, 13 ... Form a so-called parallel link. As a result, the upper holding body 11 swings above the lower holding body 12 while maintaining a horizontal state.
When the upper holding body 11 is located directly above the lower holding body 12, the distance d between the upper holding body 11 and the lower holding body 12 is the maximum, and as the arm 13 is tilted, the pair of holding bodies 11 is tilted. , 12 becomes smaller. When the upper holding body 11 moves to the side indicated by the arrow A, its operation is the chain.
Controlled by 14, the holding body 11 is fixed at a constant height position from the lower holding body 12. The distance d between the holding bodies 11 and 12 at this time is set to be larger than the thickness of the laminated body 20. When the upper holding body 11 moves to the arrow B side, the chain 14
Since there is no regulation by the above, the distance d between the holding bodies 11 and 12 is reduced. The operation of moving the upper holding body 11 from the fixed side to the movable side and vice versa is performed by the bag body 30 described later by the holder 10.
Even if it is housed inside, it can be easily performed from the outside of the bag body 30.

The bag body 30 is made of an elastic material that can be sealed.
The holder 10 is formed in such a size that it can accommodate the holder 10. For example, it is preferable that the outer peripheral portion of the bag body 30 has a bellows structure so that the holder 10 can be smoothly operated in the bag body 30. A deaerator (pump or the like) is connected to the bag body 30 so that the gas in the bag body 30 can be arbitrarily discharged.

Pre-compression bonding of the laminate 20 using the apparatus of the present invention is performed as follows.

As shown in FIG. 2, the bag 30 is arranged in the heating furnace 40, and the holder 10 is arranged in the bag 30. And
The stacked body 20 is housed between the holding bodies 11 and 12 in a state where the upper holding body 11 of the holding tool 10 arranged in the bag body 30 is positioned on the fixed side. When the stack 20 is completely stored, the inside of the bag 30 is heated to a predetermined degree of vacuum while being degassed. This allows
The bag body 30 contracts due to the pressure difference between the inside and outside, and the contracting force acts on the holding body 10. Since the upper holding body 11 is locked by the chain 14, the space between the holding bodies 11 and 12 is not narrowed even when the contracting force from the bag body 14 is received. Therefore, the contracting force of the bag body 30 does not act on the laminated body 20 housed between the holding bodies 11 and 12. Therefore, even if the unevenness formed on the surface of the intermediate film 22 in the laminate 20 has a small size, or even if the ability of the degassing device to depressurize the inside of the bag body 30 is low, the transparent plate 21 and the intermediate film 22 are The gas can be sufficiently discharged from the space. That is, the contraction force of the bag body 30 acts on the peripheral portion of the laminated body 20 first, so that a situation in which the peripheral seal is generated and the degassing of the central portion of the laminated body 20 becomes incomplete does not occur. .

When the inside of the bag body 30 reaches a predetermined vacuum degree, as shown in FIG.
As shown in, the upper holding body 11 is moved from the fixed side to the movable side. This operation can be easily performed from the outside of the bag body 30. When the upper holding body 11 moves to the movable side, the distance between the holding bodies 11 and 12 can be reduced, so that the contracting force of the bag body 30 acts on the laminated body 20 via the holding body 11. As a result, the laminated body 20 comes to receive a predetermined pressure-bonding load due to a pressure difference inside and outside the bag body 30. Then, in this state, by further heating the laminate 20,
20 is crimped with a predetermined strength. In this way, the laminate
The 20 is pre-compressed without creating a perimeter seal.

The width and pitch of the lattices of the holding bodies 11 and 12 ensure strength, while the bag body 30 is kept under reduced pressure.
Is preferably 5 to 50 mm in order to avoid a phenomenon in which P is drawn between the lattices and presses the laminate 20.

The pressure-bonding device for a laminate according to the present invention is not limited to the above embodiment, and may be of a jack type as shown in FIGS. 4 to 6, for example.

In this apparatus, the holder 10 is a holder on the upper stage.
4 cylinders 15 as fixing and switching means for 11,
It has 15 ... The cylinders 15 are arranged at the four corners of the lower holding body 12. The upper holding body 11 is supported by the lower holding body 12 by the piston 15a of each cylinder 15, and the holding body 11 is expanded and contracted by the piston 15a.
Is configured to be vertically driven. The lower end of the tube 15b in each cylinder 15 penetrates the bag body 30 and the furnace bottom of the heating furnace 40 and extends to the outside.

In such a device, fluid pressure is applied to the tubes 15b of the cylinders 15 to provide a space above the lower holding body 12 for accommodating the stacked body 20 and an upper holding body 11. Is fixed. In this state, the holders 11 and 12
The laminated body 20 is set between them, and the inside of the bag body 30 is evacuated.
As a result, the laminated body 20 is degassed without being subjected to the pressure-bonding load due to the pressure difference between the inside and outside of the bag body 30. Then, by releasing the fluid pressure in the tube 15b in each cylinder 15, the upper holding body 11 is no longer supported by the cylinder 15, so the contraction force inside and outside the bag body 30 causes the load to move downward. Will act on. Therefore, the laminated body 20 can be surely pre-press-bonded without fear of sealing the periphery. Note that the holders 11 and 12 are not limited to the grid shape, and may be, for example, a flat shape.

[0022]

EXAMPLES The present invention will be described below based on examples.

Example 1 An interlayer film mainly composed of polyvinyl butyral resin (a resin composition obtained by adding 40 parts by weight of triethylene glycol diethyl butyrate as a plasticizer to 100 parts by weight of polyvinyl butyral resin) Which has a pear-like roughness of 20 to 25 μm by embossing on the surface of the sheet for the purpose of preventing stickiness), was washed with water, dried and conditioned, and then at 20 ° C., a thickness of 3 mm, A laminated body was formed by sandwiching it between transparent plate glasses of 30 cm × 30 cm.

Using the parallel link type holder shown in FIGS. 1 to 3, the holder was set in a rubber bag. With the upper holder of this holder positioned on the fixed side, insert the stack into the holder and set the degree of vacuum within the bag to 100 mmHg (100 Torr).
The pressure was reduced to r). The laminated body was heated under reduced pressure until the glass surface reached 100 ° C. Next, the upper holding body was moved to the movable side and held in this state for 20 minutes, then cooled in a reduced pressure state and the reduced pressure was released at 50 ° C. Remove this stack from the bag, then put it in the autoclave, 140
It was kept at 13 ° C. and 13 kg / cm ² for 20 minutes for adhesion. The appearance of the obtained laminated glass, the adhesiveness between the glass and the interlayer film, and the heat resistance (boiling test, baking test) were measured as follows.

(A) Appearance of Laminated Glass When visually observed, the one having no bubbles and being transparent over the entire bonding surface between the plate glass and the intermediate film was evaluated as ◯. The case where air bubbles remained on the adhesive surface was designated as x. in this case,
The interlayers used in the tests all had fine embossments on their surfaces, so the laminates all appeared opaque.

(B) Adhesiveness of Laminated Glass The adhesiveness between the interlayer film and the plate glass was measured as follows. The laminated glass was adjusted by leaving it at a temperature of −18 ± 0.6 ° C. for 4 ± 0.5 hours, and the exposed degree of the film after the plate glass was peeled off by hammering the laminated glass was judged by a pre-graded limit sample. The results are shown as Pammel values according to Table 1.

[0027]

[Table 1]

(C) Heat resistance (boiling test) The laminated glass was left at room temperature for a whole day and night, and then left in boiling water at 100 ° C. for 4 hours. After that, the laminated glass was observed, and those in which no bubbles were generated were evaluated as ◯, bubbles in which a part was generated were evaluated as Δ, and those in which bubbles were generated on the entire surface of the laminated glass were evaluated as x. The results of these measurements are shown in Table 2.

(D) Heat resistance (bake test) The laminated glass was left at room temperature for a whole day and night, and then left in a 130 ° C gear oven for 4 hours. After that, the laminated glass was observed, and those in which no bubbles were generated were evaluated as ◯, bubbles in which a part was generated were evaluated as Δ, and those in which bubbles were generated on the entire surface of the laminated glass were evaluated as x. The results of these measurements are shown in Table 2.

Example 2 A laminated glass was produced in the same manner as in Example 1 except that the degree of vacuum was 190 mmHg (190 Torr). The appearance of this laminated glass, the adhesiveness between the glass and the interlayer film, and the heat resistance were measured by the same methods as in Example 1. Table 2 shows these measurement results.

Example 3 A laminated glass was produced in the same manner as in Example 1 except that the plate glass had a thickness of 5 mm. The appearance of this laminated glass, the adhesiveness between the glass and the interlayer film, and the heat resistance were evaluated in Example 1
It measured by the method similar to. Table 2 shows these measurement results.
Shown in.

Example 4 Vinyl chloride-ethylene-glycidyl methacrylate copolymer resin consisting of 93% by weight of vinyl chloride, 5% by weight of ethylene and 2% by weight of glycidyl methacrylate by the suspension polymerization method.
15 parts by weight of di-2-ethylhexyl phthalate (DOP) and 30 parts by weight of di-2-ethylhexyl adipate (DOA) as plasticizers, 100 parts by weight of plasticizer, 3 parts by weight of heat stabilizer, 0.3 part by weight of ultraviolet absorber. Was added and uniformly mixed with a super mixer, and then the obtained resin composition was extruded with an extruder to obtain a sheet having a thickness of 0.76 mm. The surface of the sheet is provided with fine irregularities with a roughness of 25 to 35 μm for the purpose of preventing adhesion, and the temperature of the resulting interlayer film is adjusted to 20 mm, and the thickness is 3 mm and 30 cm ×
A laminated body was prepared by sandwiching it between transparent plate glasses of 30 cm. Set this laminated body on the holder inside the bag and set the vacuum to 100 mmHg (10
The pressure was reduced to 0 Torr). The glass surface temperature is 140 at reduced pressure.
The laminate was heated until it reached ° C. Next, the upper holding body was switched from the fixed side to the movable side. In this state, the pressure was maintained for 20 minutes, after which the system was cooled in a reduced pressure state and the reduced pressure was released at 50 ° C. The laminated body taken out from the bag was put into an autoclave and held at 140 ° C. under 13 Kg / cm ² for 20 minutes for adhesion.
The appearance of the obtained laminated glass, the adhesiveness between the glass and the interlayer film, and the heat resistance were measured by the same methods as in Example 1.
The results are shown in Table 2.

Example 5 A laminated glass was produced in the same manner as in Example 4 except that the degree of vacuum inside the bag was 190 mmHg (190 Torr). The appearance, adhesiveness with glass, and heat resistance of this laminated glass were measured by the same methods as in Example 1. The results of these measurements are shown in Table 2.

Example 6 A laminated glass was produced in the same manner as in Example 4 except that the plate glass had a thickness of 5 mm. The appearance, adhesiveness with glass, and heat resistance of this laminated glass were measured by the same methods as in Example 1.

Comparative Example 1 A laminated glass was produced in the same manner as in Example 1 except that the laminated body was placed in a rubber bag without using a holder. The appearance of this laminated glass, the adhesiveness between the glass and the interlayer film, and the heat resistance were measured by the same methods as in Example 1.
Table 3 shows these measurement results.

Comparative Example 2 A laminated glass was produced in the same manner as in Example 2 except that the laminated body was placed in a rubber bag without using a holder. The appearance of this laminated glass, the adhesiveness between the glass and the interlayer film, and the heat resistance were measured by the same methods as in Example 1.
Table 3 shows these measurement results.

Comparative Example 3 A laminated glass was produced in the same manner as in Example 3 except that the laminated body was placed in a rubber bag without using a holder. The appearance of this laminated glass, the adhesiveness between the glass and the interlayer film, and the heat resistance were measured by the same methods as in Example 1.
Table 3 shows these measurement results.

Comparative Example 4 A laminated glass was manufactured in the same manner as in Example 4 except that the laminated body was placed in a rubber bag without using a holder. The appearance of this laminated glass, the adhesiveness with the interlayer film with the glass, and the heat resistance were measured by the same methods as in Example 1. Table 3 shows these measurement results.

Comparative Example 5 A laminated glass was produced in the same manner as in Example 5 except that the laminated body was placed in a rubber bag without using a holder. The appearance of this laminated glass, the adhesiveness of the laminated glass with the glass, and the heat resistance were measured by the same methods as in Example 1. Table 3 shows these measurement results.

Comparative Example 6 A laminated glass was produced in the same manner as in Example 6 except that the laminated body was placed in a rubber bag without using a holder. The appearance of this laminated glass, the adhesion between the glass and the interlayer film, and the heat resistance were measured by the same method as in Example 1.
The results are shown in Table 3.

[0041]

[Table 2]

[0042]

[Table 3]

As is clear from Tables 2 and 3, by using the apparatus of the present invention in the vacuum adjustment by the rubber method, the surface roughness of the intermediate film is as small as 20 to 25 μm and the vacuum degree of vacuum is low. It was confirmed that even when the pressure was 190 mmHg, which was relatively high, a peripheral seal did not occur when the laminated glass was pressure-bonded with the bag.

[0044]

The pressure-bonding device for a laminated body according to the present invention can be placed in a depressurized state in a state where a pressure-bonding load does not act on the laminated body in the bag body, so that it exists between the transparent plate and the intermediate film. The possible air can be quickly and sufficiently discharged. Moreover, when the laminated body is heated and pressure-bonded, a sufficient pressure-bonding load acts on the laminated body, so that the laminated body can be surely crimped.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a holder used in the present invention.

FIG. 2 is a schematic view illustrating a method of using the crimping device of the present invention.

FIG. 3 is a schematic view illustrating a method of using the crimping device of the present invention.

FIG. 4 is a perspective view showing another embodiment of the holder used in the present invention.

FIG. 5 is a schematic view illustrating a method of using the crimping device of the present invention.

FIG. 6 is a schematic view illustrating a method of using the crimping device of the present invention.

FIG. 7 is a schematic diagram for explaining a method for manufacturing laminated glass using a rubber method.

[Explanation of symbols]

 10 Holding tool 11 Holding body 12 Holding body 13 Switching means 14 Switching means 15 Switching means 20 Laminated body 21 Transparent plate 22 Intermediate film 30 Bag body

Claims (1)

[Claims] 1. A laminate comprising an intermediate film formed of a synthetic resin and transparent plates provided on both side surfaces of the intermediate film, which are pressure-bonded to each other, and the laminate is heated to form the laminate. A crimping device for a laminated body that discharges a gas that may exist between an intermediate film of a body and a transparent plate, the bag being capable of crimping the laminated body by containing the laminated body inside and deaerating the inside. Body and
A pair of parallel holding bodies, each of which is arranged with an adjustable interval on the outer surface in the crimping direction of the laminated body housed in the bag body;
And a switching means capable of switching between a state in which the pair of holding bodies are fixed with a distance between the pair of holding bodies being equal to or larger than the thickness dimension of the laminated body and a state in which the fixing is released by an operation from the outside of the bag body. A pressure-bonding device for a laminated body, comprising: