JPS62297136A - Manufacture of laminate - Google Patents

Abstract

PURPOSE:To reduce the production cost and at the same time obtain a plastic film with good surface quality by a method wherein a laminate is produced by fixing the plastic film to a plate-like body under pressure by evacuating a vacuum bag, which is made of the plastic film of the laminate and in which the plate-like body is put, for pressure-fixing. CONSTITUTION:When the manufacture of a laminate 1, which is produced by laminating a plastic film 3 onto at least either one of plate-like bodies 2 and 12, is intended, the plate-like body 12 is arranged in a vacuum bag 10, which is made of the plastic film to be laminated onto the plate-like bodies 2 and 12, so as to evacuate the vacuum bag 10 in order to fix the plastic film to the plate-like body under pressure. A laminate 1, in which the plastic film is laminated onto at least either one of the plate-like bodies, is cut off from the vacuum bag. With no various defects such as unevenness, wrinkles, cracks, deformation, transparently observable strain and the like developed in the plastic film, a laminate with favorable quality is obtained.

Description

[Detailed description of the invention] 3. Detailed description of the invention [Industrial application field] The present invention relates to a method for manufacturing a laminate.

[Prior Art] As a conventional method for manufacturing laminated glass in which two glass plates are laminated and laminated with an interlayer film, there is a method using a pre-pressing rubber bag. In this method, a laminate with a laminated interlayer film sandwiched between two glass plates is placed in a pre-pressing rubber bag, the bag is evacuated, the entire bag is heated, and the glass plates and the laminated interlayer film are bonded by thermocompression. However, for example, when manufacturing pie layer type safety glass in which a plastic film is bonded to a glass plate, if the above-mentioned pre-pressed rubber bag method is used, unevenness and wrinkles on the inside of the pre-pressed rubber bag will be removed from the plastic film. A problem was discovered in which the glass was transferred to the surface of the glass, resulting in a serious drawback as a safety glass. or.

As an improved manufacturing method for the above-mentioned safety glass, a cover glass plate having the same shape as the safety glass to be manufactured is layered on a plastic film of a laminate of a glass plate and a plastic film, and a pre-pressing rubber bag method etc. JP-A-58-194533 and JP-A-58-1 disclose a method of obtaining the above-mentioned type of safety glass by thermally pressing a glass plate and a plastic film and peeling off a cover glass plate.
This is proposed in Japanese Patent No. 194534. According to this method, thermocompression bonding of thermoconcave plastic films is possible, but for thermosetting plastic films,
This method has the disadvantage that dents are formed on the mold release surface due to the influence of dust present at the interface, and a highly dust-free chamber is required.

Further, there was also a decrease in yield due to insufficient mold release force during mold release.

In addition, the applicant has also filed Japanese Patent Application No. 59-255037 (
s, we have proposed a method for manufacturing the aforementioned pie-layer type safety glass using conventional laminated glass using a vacuum bag and a vacuum packaging machine. In this method, the laminate is placed in a heat-sealable vacuum bag, the vacuum chamber is evacuated, the opening of the vacuum bag is heat-sealed, and the entire vacuum bag is heated to a predetermined temperature. It is something to do. According to this method, if a glass plate or a hard plastic film is placed on the surface, a good quantity can be produced, but if a soft and easily damaged plastic film is placed on the surface, the plastic The film may be deformed and perspective distortion may occur.

[Problems to be Solved by the Invention] The present invention relates to the production of a laminate in which a plastic film is laminated on at least one side of a plate-shaped body, and particularly to the production of a safety glass laminate in which a plastic film is laminated on at least one side of a glass plate. In this case, the plastic film is uneven.

The object of the present invention is to provide a manufacturing method for obtaining a laminate of good quality without causing various defects such as wrinkles, scratches, deformation, and perspective distortion.

[Structure of the Invention] The present invention was invented as a result of research based on the above-mentioned object, and the gist thereof is that at least one of the plate-shaped bodies
When manufacturing a laminate made of plastic films,
The plate-like body is placed in a vacuum bag in which at least the laminated side surface of the plate-like body is made of a plastic film to be laminated to the plate-like body, the inside of the vacuum bag is evacuated, and the plate-like body and the plastic film are evacuated. The present invention relates to a method for producing a laminate, characterized in that the laminate is pressure-bonded with a film, and then a laminate in which a plastic film is laminated on at least one side of the plate-shaped body is cut out from the vacuum bag.

The present invention will be explained in more detail below.

1 to 5 schematically show some of the configurations of a single body 1 manufactured according to the present invention, and FIG. FIG. 2 is a cross-sectional view of the laminated body obtained by applying an adhesive layer 4 on one side of the plate-shaped body 2.
FIG. 3 is a cross-sectional view of a laminate in which a plastic film 3 is laminated with a plastic film 3 interposed therebetween.
FIG. 4 is a cross-sectional view of a laminate 1 in which a plastic film 3 is laminated on one side of a laminated type plate-like body 2, and FIG. Plastic film 3 on both sides of plate-shaped body 2
FIG. 2 is a cross-sectional view of a laminate 1 obtained by laminating the following with an adhesive layer 4 interposed therebetween.

The plate-like body 2 in the present invention is a base on which a plastic film is laminated, and representative examples include an inorganic glass plate, a plastic plate made of polycarbonate, acrylic resin, and various other plastics, but the plate is of course not limited to these. The shape of the plate-like body 2 is not particularly limited, and the plastic film 3 may be a thermoplastic film, a thermosetting plastic film, or a thermoplastic film and a thermoplastic film, depending on the purpose. A plastic film made of multiple layers of curable plastic film,
Various plastic films can be used, such as a plastic film with an adhesive layer 4 formed on the laminated surface side of the plate-shaped body 2, and a plastic film subjected to various processing.

Typical examples of the laminate of the present invention include automobiles in which the plate-shaped body is a transparent glass plate and a plastic film is laminated on the glass plate to increase safety when the glass plate is broken;
This is safety glass for railways, ships, aircraft, and other various transportation vehicles, for architecture, and for various types of equipment. In the case of such safety glass, a transparent plastic film that has functions such as reducing skin damage caused by glass plate breakage in the event of a collision, and also has functions such as penetration resistance and scratch resistance,
For example, a laminated plastic film of polyethylene terephthalate film, nylon film, self-healing thermosetting polyurethane film, etc. and an adhesive interlayer film such as polyvinyl butyral or ethylene-vinyl acetate copolymer, or a laminated surface with a glass plate. Plastic films such as polyethylene terephthalate film, nylon film, self-healing thermosetting urethane with an adhesive layer on the side, or single-layer or multi-layer films of polyurethane, such as a thermoplastic urethane layer on the side laminated with the glass plate. Typical examples include a plastic film having a self-healing thermosetting urethane layer on the outside, or a plastic film made of surface-modified thermoplastic urethane.

The side of the plastic film that is laminated onto the plate-like body is
It is best to emboss the entire surface to ensure sufficient ventilation and pre-crimping or crimping. The depth of such embossing is 0.1 to 5 μm, more preferably 1.5 μm. It is in the range of Q to 2.5 μm. Further, the plastic film or each film constituting the plastic film can be subjected to various treatments such as corona discharge treatment to improve adhesiveness.

The glass plate of the above-mentioned safety glass may be bent or strengthened, or may be coated with a transparent surface such as a conductive coat, a heat ray reflective coat, a colored coat, or a hard coat.
A translucent coating or an opaque surface coating may be applied partially or completely.The thickness of the glass plate is 1.0 to 20 layers, especially for automobiles, 2.0-2.
Approximately 8.0 m+s is appropriate.

In manufacturing a laminate according to the present invention, a vacuum bag is prepared in which the plate-shaped body is placed. This vacuum bag is constructed of a plastic film constituting the laminate, at least on the side that is laminated to the plate-shaped body. Specifically, the entire vacuum bag may be made from a plastic film that constitutes a laminate, or one side of the vacuum bag may be made from a plastic film laminated to a plate, and the other side may be made from a plastic film made of another material. It may be made of a base film or a flexible base sheet, or the part that is laminated to the plate-like body of the vacuum bag may be made of the plastic film that constitutes the laminate, and the other parts may be made of other plastic materials. The parts of the vacuum bag laminate that are not made of plastic film, such as the above-mentioned base film or base sheet, which may be made of film or flexible sheet, are made of one or more layers of plastic film. A film or flexible plastic sheet is used. Such materials can be made by placing a plate-shaped body in a vacuum bag, evacuating the bag, pre-pressing it, and then heating or heating and pressurizing the plate-shaped body in a heating chamber or an autoclave without removing it from the vacuum bag. In the case of main compression bonding, it is preferable to use a material that has heat resistance that corresponds to the heating so that it will not melt or soften even at the heating temperature, for example, 5G-150°C. It is preferable that a vacuum bag with good airtightness can be made by heat-sealing, adhesion, etc. with the plastic film constituting the laminate.

For example, when sealing a vacuum bag after degassing is performed by heat fusion, a thermoplastic single-layer plastic film made of polyethylene, polypropylene, vinyl chloride resin, ethylene-vinyl acetate copolymer, polyurethane, unstretched nylon, etc. Alternatively, a typical example is a two-layer type in which a heat-sealed plastic film is used as the inner side and a nylon film or polyester film is attached as the outer side, but it is of course limited to these. When sealing the vacuum bag after degassing the vacuum bag by heat sealing, the entire vacuum bag or at least the opening of the vacuum bag should be sealed with heat sealable or hot melt adhesive. It is appropriate to have gender. Further, the opening of the vacuum bag may be sealed by using a material having adhesive or adhesive properties on the joint surface of the sealing portion of the opening of the vacuum bag, or by further applying heat.

The shape of the vacuum bag is selected according to the shape of the laminate to be created, and is not particularly limited. For example, one side of the vacuum bag may be made of plastic film constituting the laminate. It is suitable for use if the back surface is made of a base plastic film or a plastic film constituting the same laminate as above, and which is made into a bag by sealing two or three sides of the periphery in advance. The vacuum bags shown in Figures 6 to 8 are bag-shaped with an open end on one side, and with this type, the sealing process is easy because it is only necessary to seal the - side by heat sealing. .

In addition, in a vacuum chamber, a vacuum bag is made by heat sealing from the plastic film constituting the laminate, or a continuous plastic film such as a strip or bag strip made of the film and a base film, and a plate-like material is attached to the vacuum bag. You may also include

As a method for manufacturing a laminate according to the present invention, an example in which the plate-like body is a glass plate will be explained. First, a veneer type that has been thoroughly cleaned, dried, and dust removed so that it can be used for lamination.
Alternatively, a glass plate, such as a laminated glass type, is placed in a prepared vacuum bag so that the plastic film side for forming the laminate of the bag becomes the plastic film lamination side of the plate-like body. Such a vacuum bag should also be thoroughly cleaned, dried, and dusted, especially the inner surface that will be laminated with the glass plate. In addition, if the pressure bond between the glass plate and the laminated plastic film is insufficient, the inner surface side that will be laminated with the glass plate should be thoroughly cleaned. There is no problem even if an adhesive interlayer is layered on the surface side or an adhesive layer is formed on the laminated surface side of the glass plate surface.The work of placing this plate-like body into a vacuum bag can be done in the atmosphere or in a clean room. This may be carried out in a vacuum chamber or may be carried out in a vacuum chamber before degassing.

Once the glass plate is placed in the vacuum bag, the inside of the vacuum bag is evacuated to perform preliminary pressure bonding, and then the vacuum bag is preferably sealed. If this evacuation step is carried out at a temperature of 20° C. or lower, the evacuation can be carried out more efficiently, and defects in transparency due to the formation of an air layer at the interface between the film and the glass due to vacuum defects can be reduced.

In this process, as shown in FIG. 6, after the plate-shaped body 12 is placed inside the vacuum bag 10 whose sealing area at least near the opening ll of the vacuum bag IO is heat-sealable, the vacuum bag JO is placed inside the vacuum chamber 13. Alternatively, the plate-shaped body 12 is placed in the same vacuum bag lO placed in the vacuum chamber 13, the opening of the vacuum bag lO is opened by an appropriate means, and then the vacuum bag lO is placed in the vacuum chamber 13.
3 is evacuated to vacuum using the exhaust pipe 14, and the vacuum chamber 13 is
The inside of the vacuum bag 1G is evacuated, and then the opening 11 of the vacuum bag 10 is heat-sealed with a heat sealing member 15, 18 to seal the vacuum bag 10, or as shown in FIG. After putting the plate-shaped body 12 into a vacuum bag 10 whose opening 11 is heat-sealable, the vacuum bag 10 is put into the vacuum chamber 13, or the same vacuum bag 10 as described above is placed in the vacuum chamber 13. The plate-shaped body 12 is placed inside, the opening of the vacuum bag 10 is opened by an appropriate means, and then the inside of the vacuum chamber 13 and the vacuum bag 10 are connected to the suction and exhaust pipe 17 for the vacuum chamber and the vacuum bag 10. The inside of the vacuum chamber 13 and the inside of the vacuum bag 10 are evacuated by the exhaust pipe 14 of the vacuum bag 10, and then the opening 11 of the vacuum bag 10 is sealed with a heat seal member 15.
18 to seal the vacuum bag IO. Alternatively, as shown in FIG. 8, after placing the plate-shaped body 12 in a vacuum bag 10 whose opening 11 is heat-sealable, the plate-like body 12 is sucked and exhausted through the exhaust pipe insertion port of the vacuum bag 1° without being placed in the vacuum chamber. The pipe 17 is connected, the pipe 14 is evacuated, the inside of the vacuum bag 10 is evacuated, and then the vacuum bag 1 is evacuated.
0 may be heat-sealed with a heat-sealing member 15.18 to seal the vacuum bag 10. After the vacuum bag containing the plate-shaped body is evacuated in a vacuum chamber and sealed, Air introduction pipe into the vacuum chamber 21. Alternatively, air is introduced through the suction and exhaust pipe 17 to release the vacuum, and the vacuum bag lO containing the plate-shaped body is taken out from the vacuum chamber.

The temperature in the process of vacuuming the vacuum bag and pre-pressing is 40℃.
The temperature is preferably 0.degree. C. or less, more preferably 20.degree. C. or less.

The examples shown in FIGS. 6 to 8 are vacuum bags that are sealed by heat sealing.
Not by heat sealing, but by applying adhesiveness or adhesiveness to the sealed part of the opening of the vacuum bag, and applying pressure, pressure bonding, or heating.

Such an opening may be sealed.

It should be noted that the plate-shaped body and the plastic film can be sufficiently bonded together simply by vacuum degassing inside the vacuum bag.
Evening!岱ME■ 口蔗の、So - 11/ l÷
Asu f 1. Similarly, sealing of the opening of the vacuum bag is not necessarily necessary, or even if the plate-shaped body and the plastic film are sufficiently crimped by heating the vacuum bag while continuing to evacuate the vacuum bag, sealing the opening of the vacuum bag is not necessarily necessary. do not.

In this way, the degassed vacuum bag containing the plate-like material can be placed in the heating chamber while still in the vacuum bag, or heated while passing through the heating zone, or heated inside the vacuum chamber to form the plate-like material. and the plastic film of the vacuum bag laminate. In some cases, after the heat treatment as described above, the plate is further placed in an autoclave and heated and pressurized, or alternatively, the sheet is placed in an autoclave and heated and pressurized without performing the heat treatment as described above. The plastic film on the side of the bag laminate that will become the plastic film may be crimped.

The temperature conditions for the normal pressure lower jaw heat treatment in the heating chamber described above vary depending on the type of plastic film, adhesive interlayer film, or adhesive used, and appropriate conditions are selected depending on the type, but generally speaking For example, if the plastic film is thermosetting polyurethane with an adhesive layer, the above heat treatment temperature is 80°C.
~! 50℃, the laminated side is thermoplastic polyurethane,
In the case of a plastic film with thermosetting urethane on the outside, the above heat treatment temperature is 80°C to 150°C, and in the case of a plastic film made of adhesive intermediate film material polyethylene terephthalate, the above heat treatment temperature is 80°C to 150°C. The temperature is 80°C to 150°C. Appropriate heat treatment time in the heating chamber is about 3 to BO minutes.For example, after such heat treatment, a heat compression treatment may be performed in an autoclave as necessary.In this case, normally 80~IEIO℃ in autoclave, 2~10kg
The mixture is held under heat and pressure of about 1/cm2 for 15 minutes to 2 hours.

In addition, when attaching the plastic film of the vacuum bag to the plate-shaped object, if the entire surface side is embossed, vacuum evacuation will be easier, so there will be no pressure treatment under heating in an autoclave. In some cases, compression bonding is possible by heat treatment in a heating chamber. In this case,
Manufacturing costs can be reduced. It should be noted that if the adhesion between the plate-shaped body and the plastic film is sufficient only by evacuation treatment in a vacuum bag without heat treatment in a heating chamber or autoclave, the above-described heat treatment is not necessary.

Of course, the lamination and pressure bonding operation of a plurality of plate-shaped members using vacuum bags and the plastic film of the vacuum bag may be performed simultaneously in a vacuum chamber, or may be performed continuously.

In the illustrated vacuum chamber, the upper lid 18 is removed from the lower plate 19 so that the plate-shaped object can be placed in the vacuum chamber, and then, when the upper lid is closed, the inside of the vacuum chamber is sealed by the backing 20. However, there are various types of vacuum chamber opening/closing or opening/closing mechanisms for transporting the plate-like object or the vacuum bag containing the plate-like object into the vacuum chamber. Can be adopted.

After heat treatment in a heating chamber or after heating and pressurizing in an autoclave, remove from the heating chamber or autoclave and cool to room temperature as necessary.Next, the plastic film attached to the plate of the vacuum bag is cut according to the outline of the plate to obtain a laminated body of the plate and the plastic film. When cutting such a plastic film, it may be cut to match the contour of the plate-like object, or it may be cut to a predetermined width around the plate-like object, or so that trimmings of the plastic film are formed at necessary locations. Alternatively, the plastic film may be cut so as to form a margin around the plate or at a necessary location.

"Example" The present invention will be explained below with reference to the drawings.

Example 1 Self-healing thermosetting polyurethane M (layer thickness: 0.2+am) as the surface layer, thermoplastic polyurethane M (layer thickness: 0.7μm) as the intermediate layer, and adhesive layer for attaching to the glass plate. Low thermoplastic polyurethane layer (M thickness 0.0
A plastic film with a three-layer structure consisting of 3mm) and embossed to a depth of 2μm on the entire surface of the adhesive layer, and a base plastic film consisting of the same plastic film as above were prepared, and both films were cut into a predetermined shape. Then, the periphery was heat-sealed to make an envelope-shaped vacuum bag as shown in Figure 8. This envelope-shaped vacuum bag was made so that the adhesive layer of the plastic film was on the inner surface of the vacuum bag. The size is 1500mm in height
It is 850H wide.

The bag-making work was carried out in a class 1000 dust-free room, and the film was sufficiently dusted using a suction-type static eliminating dust remover before bag-making.

Regarding this vacuum bag, the 1320 bag has also been sufficiently dust removed.
a+mX 820 mm First, the glass plate was placed in a heating chamber with an atmosphere of A safety glass laminate consisting of a plastic film and a glass plate was created.

The safety glass thus obtained had the embossment of the plastic film disappeared, had good transparency, was free of scratches, irregularities, wrinkles, etc., and had excellent surface properties with little distortion in perspective.

Example 2 In a plastic film having the same structure as Example 1,
The embossing depth was 1.5 μm and the unstretched nylon film as the base film were dusted in the same manner as in Example 1 using a suction type dust remover in a class 1000 dust-free room. A vacuum bag was made in the same manner. A bent glass plate (1320mm x 820++s x 3mm) that has been thoroughly cleaned and dust removed is placed in this vacuum bag.
I put it in.

This bag was placed in a vacuum chamber equipped with a heat sealing device, and the vacuum chamber and the inside of the vacuum bag were evacuated to a degree of vacuum of about 2 mmHH.

After evacuation, the vacuum bag was sealed using a heat sealing device located inside the vacuum chamber. As a result, even if the vacuum chamber is opened to the atmosphere,
It was possible to maintain a vacuum inside the bag. Thereafter, it was heated to bring the atmosphere to 100°C. After the temperature of the glass plate exceeded 87°C, it was maintained for 10 minutes, and then taken out from the heating chamber and cooled. After cooling, the portion of the vacuum bag without the glass plate and the base film were removed, thereby making it possible to obtain a laminate with good transparency.

Example 3 A self-healing thermosetting polyurethane layer (layer thickness 0.4+v) as a surface layer, and an ethylene-vinyl acetate copolymer (layer thickness 0.03 mm) as an adhesive layer for bonding to a glass plate.
It has a two-layer structure consisting of
Prepare a plastic film with μm embossing and a base plastic film made of polyethylene film (thickness: 125 μm). Cut both films into a predetermined shape, heat seal the periphery, and as shown in Figure 8. I made an envelope-shaped vacuum bag. This envelope-shaped vacuum bag has one side made of the above-mentioned two-layer plastic film 22.
The bag was made so that the other side was the polyethylene film 23 and the adhesive layer of the plastic film was on the inner surface of the vacuum bag. The size is 1500mm in height,
It is 850 liters wide.

The bag-making work was carried out in a class 1000 dust-free room, and the film was sufficiently dusted using a suction-type static eliminating dust remover before bag-making.

Regarding this vacuum bag, the 1320 bag has also been sufficiently dust removed.
! IIIX 820 s + m First, put it in a heating chamber and gradually heat it to 105℃.
The vacuum bag was then taken out from the heating chamber and the plastic film was cut along the glass plate shape 12. Tori cormorant #
I created a wood-to-fu 13 seaweed.

The safety glass obtained in this way eliminates the embossment on the plastic film, has good transparency, and is free from scratches.
It had excellent surface properties with no irregularities or wrinkles, and little perspective distortion.

Example 4 A biaxially oriented polyethylene terephthalate film (DI thickness 125 μm) subjected to a surface hardening process was used as the surface layer, and a polyvinyl butyral film (film thickness 0.38 μm) was used as the adhesive intermediate layer.
Prepare a plastic film with a two-layer structure consisting of 1 mm) and embossed to a depth of 5 μm on the entire surface of the adhesive layer, and a base plastic film with a 2-layer structure consisting of nylon and polyethylene. The polyvinyl butyral film was cut into a shape, the polyethylene layer was placed on the inner surface of the bag, and the periphery was heat-sealed to produce a vacuum bag. This envelope-shaped vacuum bag has the two-layered plastic film 22 on one side and the two-layered base plastic film 23 on the other side, and the adhesive layer of the plastic film is on the inner surface of the vacuum bag. The bag was made in this way. The size is 1 vertically
50 (1wm, width 850II11).

Bag-making work is carried out in a class 1000 dust-free room.

The film was then sufficiently dusted using a suction-type static eliminating and dust removing device before being made into bags.

Regarding this vacuum bag, the 1320 bag has also been sufficiently dust removed.
+smX 820 m+sX 3mm bent glass plate was inserted. This bag was placed in a vacuum chamber equipped with a heat sealing device as shown in FIG. 6, and the vacuum chamber and the inside of the vacuum bag were evacuated to a degree of vacuum of about 2 mmHg. After evacuation, the vacuum bag was sealed using a heat sealing device located inside the vacuum chamber. After that, it was first placed in a heating chamber with an atmosphere of 60°C, and gradually heated to 110°C, and held for 15 minutes.Then, the vacuum bag was removed from the heating chamber, and the plastic film was cut along the glass plate shape 12, and the plastic film and glass A safety glass laminate consisting of laminated plates was created.

The safety glass obtained in this way eliminates the embossment on the plastic film, has good transparency, and is free from scratches.
It had excellent surface properties with no irregularities or wrinkles, and little perspective distortion.

Comparative Example 1 The plastic film and glass plate described in Example 1 (dimensions: 300 mm x 300 mm each) were placed in a vacuum bag made of a silicone rubber sheet with a smooth surface and 2 mm thick.
) was inserted. At this time, as in Example 1, the film and glass were sufficiently cleaned and dust removed. Dust was also removed from the vacuum bag.

The inside of the vacuum bag was evacuated, and the entire bag was heated to 100° C. and held for 10 minutes. When this was cooled and the laminate inside the bag was taken out, there was dust between the silicone rubber sheet and the plastic film attached to the glass plate, resulting in an uneven surface.

Comparative Example 2 On the thermosetting polyurethane side of the same plastic film as in Example 1, a release-treated glass made of polymethylsiloxane baked at 330°C was used, and on the low thermoplastic polyurethane side, a cleaned glass plate was used as a class 1000 dust-free glass plate. Laminated indoors. The size of such plastic film and glass plate is 200+om x 200mm, respectively.

Put this in a vacuum rubber bag, and after vacuum degassing, put it in an autoclave and heat it for 2 hours at 130℃ in an atmosphere of 10kg/c+a2.
The mixture was held for 0 minutes, then the pressure was reduced and the mixture was cooled.

When the release-treated glass of the press-bonded laminate was peeled off, dents were partially formed due to dust mixed in at the interface between the release-treated glass and the film.

``Effects of the Invention'' As described above, according to the present invention, when manufacturing a laminate in which a plate-shaped body and a plastic film are bonded together, part or all of the vacuum bag used for crimping is bonded to the laminate. The plate-shaped body is placed in a vacuum bag, evacuated, the plate-shaped body and the plastic film are crimped together, and then a plastic pick-up 11/F is used.
11 橢 0 田 z 1 can be used as a base material, and since at least a part of the vacuum bag also serves as a plastic film to be attached to the plate, material costs can be reduced. It can be reduced. Furthermore, compared to conventional pre-press rubber bags, the vacuum bag used in the present invention can be easily manufactured by using a plastic film attached to a plate-shaped body, or by heat sealing using such a plastic film and a base film. It is easy to make and can reduce manufacturing costs.

In addition, in the present invention, the plate-shaped body is placed in a vacuum bag, the inside of the vacuum bag is evacuated, and the opening of the vacuum bag is then sealed. The pre-press bonding can be carried out by heating the pre-press bonded laminate in a heating chamber under normal pressure, or by heating and pressurizing it in an autoclave. The advantage is that the crimping manufacturing process can be simplified and the manufacturing time can be further shortened. In addition, the vacuum bag of the present invention is thin and light, so it has an energy saving effect against heat.Furthermore, in the conventional pre-crimping method using a pre-crimped rubber bag or the pre-crimping method using nipper rolls, the vacuum bag is thin and light, so -Due to the structure of the roll, during preliminary pressure bonding of a laminate having a plastic film on the surface, wrinkles, irregularities, and scratches from the pressure bag are transferred to the plastic film, resulting in a laminate with many surface defects. Since there is no material that transfers the above-mentioned defects to the upper surface of the plate-shaped body on the plastic film side during pressure bonding, a plastic film with good surface quality can be obtained. In particular, as described above, the present invention can significantly reduce wrinkles, unevenness, and optical distortion on the surface of the plastic film compared to conventional methods, so it can be used as a single film for windows of automobiles, other various transportation vehicles, aircraft, etc. A plastic film that is tear-resistant, scratch-resistant, and, in some cases, puncture-resistant, is attached to the interior side of a plate glass plate or laminated glass plate to prevent skin damage to passengers when the glass plate breaks. It is ideal for manufacturing safety glass that requires high quality surface finish.

According to the present invention, since a vacuum bag that can be applied to various shapes and configurations is used, it has the advantage that it can be applied to the production of end layer bodies with complicated curved shapes compared to conventional rubber crimping. It is something that can be demonstrated.

[Brief explanation of the drawing]

1-5 show cross-sectional views of various types of laminates produced according to the invention, and FIGS. 6-8 are illustrations showing the lamination apparatus used to carry out the invention. It is a diagram. 1; Laminated body 2, 12: Plate body 3; Plastic film 4; Adhesive layer 5; Adhesive interlayer film 1o; Vacuum bag 13; Vacuum chamber 14; Exhaust pipe 15.113
; Heat seal member 17; Intake/exhaust pipe 21; Atmospheric introduction pipe difference 10 20th J r9 gear ÷ 12 Chire e

Claims (10)

[Claims] (1) When manufacturing a laminate in which a plastic film is laminated on at least one side of a plate-shaped body, at least the laminated side of the plate-shaped body is placed in a vacuum bag made of the plastic film to be laminated to the plate-shaped body. The inside of the vacuum bag is evacuated, the plate-shaped body and the plastic film are crimped together, and then the laminate in which the plastic film is laminated on at least one side of the plate-shaped body is removed from the vacuum bag. A method for manufacturing a laminate, characterized by cutting it out. (2) The laminate according to claim 1, wherein the opening of the vacuum bag is sealed after a plate-shaped body is placed in the vacuum bag and the inside of the vacuum bag is evacuated. manufacturing method. (3) The method for manufacturing a laminate according to claim 2, wherein the opening of the vacuum bag is sealed by heat fusion. (4) Claim 1, characterized in that the plate-shaped body is placed in the vacuum bag and the interior of the vacuum bag is evacuated, and then the plate-shaped body and the plastic film are crimped together by heating. A method for manufacturing the laminate described above. (5) After placing the plate-shaped body in the vacuum bag and evacuating the inside of the vacuum bag, sealing the opening of the vacuum bag, and then heating to press the plate-shaped body and the plastic film together. A method for producing a laminate according to claim 1, characterized in that: (6) A method for manufacturing a laminate according to claim 1, characterized in that a plate-like body is placed in the vacuum bag, and the vacuum bag is continuously evacuated and then thermocompression bonded. (7) Place the vacuum bag containing the plate into a vacuum chamber, evacuate the inside and outside of the vacuum bag at the same time in the vacuum chamber, seal the vacuum bag, and then bring the outside of the vacuum bag to atmospheric pressure. 2. The method for manufacturing a laminate according to claim 1, wherein the plate-shaped body and the plastic film are bonded by thermocompression by heating. (8) One side of the vacuum bag is made of a plastic film laminated to the plate-like body, the back side is made of a base film, and the bag is made by sealing two or three sides of the periphery in advance. A method for producing a laminate as claimed in claim 1. (9) Claim 1, characterized in that the plastic film to be laminated on the plate-shaped body of the vacuum bag is embossed with a depth of 0.1 to 5 μm on the plate-shaped body side.
2. Method for manufacturing a laminate described in Section 1. (10) The method for manufacturing a laminate according to claim 1, wherein the plate-like body is a glass plate.