JP2002103455A - Method for adhering sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To raise a yield without generating foam, streak or the like in a sheet internally provided in a laminated glass by adhering the sheet using a resin which does not normally exhibit adhesive properties at a lower tempera ture than a softening point but exhibits the adhesive properties by absorbing a moisture as an adhesive layer to a surface to be adhered by a uniform adhe sive force in the surface of the adhesive surface of the sheet, temporarily adher ing the sheet to the laminating surface side of the laminated glass, and accurate ly holding the position adhered to the laminating surface side of the glass up to pressurizing and heating steps by an autoclave for manufacturing the laminat ed glass. SOLUTION: A method for adhering the sheet comprises the steps of condensing the moisture on the surface of the adhesive surface of the sheet having the adhesive layer made of the resin which develops the adhesive properties by absorbing the water and/or the surface of the side to be adhered for adhering the sheet to develop adhesive properties on the adhesive layer of the sheet, and adhering the sheet to the surface of the side to be adhered by an adhering means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching a sheet to be adhered to a surface to be adhered by wetting an adhesive surface side of a sheet having an adhesive layer made of a resin exhibiting tackiness by absorbing moisture with an appropriate amount of moisture. Regarding how to wear.

Further, the present invention provides a functional sheet such as a hologram element for HUD, decoration, and 3D image, a light shielding sheet for shade band, etc. on an interlayer of laminated glass for vehicle windows or architectural windows. The present invention relates to a method for manufacturing a laminated glass in which a colored sheet, a decorative sheet on which patterns and patterns are printed, a metal-deposited sheet such as a half mirror, a polarizing sheet, a retardation sheet, or a flat lens are provided.

[0003]

2. Description of the Related Art Polyvinyl butyral (hereinafter abbreviated as PVB), ethylene-vinyl acetate copolymer (hereinafter referred to as E)
VA), and a thermal adhesive such as a cross-linked ethylene-vinyl acetate copolymer (hereinafter abbreviated as a cross-linked EVA) is heated to a softening point or higher to be melted by heat and fused to be bonded. Are used as interlayer films of laminated glass for automobiles or buildings.

For example, when manufacturing a laminated glass for a windshield of an automobile using PVB as an intermediate film, the P
After sandwiching a sheet made of VB between two pieces of curved glass processed into the shape of a windshield, from the curved glass,
The protruding PVB sheet is cut in accordance with the shape of the curved glass, and the periphery is sealed with an annular device made of a tube with a cut inside made exclusively for the production of laminated glass, and placed in an autoclave that is a pressure heating device. Put,
After degassing the inside of the laminated glass with an annular device, the laminated glass is heated under pressure, the intermediate film made of PVB is thermally melted, and the two glass sheets are bonded and integrated.

[0005] Manufacturing conditions for producing laminated glass, that is, heating and pressurizing in a autoclave a glass sheet having a PVB sheet sandwiched as an intermediate film between two sheet glasses are usually performed at a heating temperature of 120 ° C to 145 ° C. , Pressure, 1.
^{03 × 10 6 Pa / m 2} ~1.27 × 10 6 Pa / m 2, that is, ^{10.5kg / cm 2 ~13.0kg / cm 2} .

An intermediate film made of PVB has an embossed surface so that it is easily degassed from a state where air is interposed between the glass and the glass. The laminated body sandwiching the embossed PVB interlayer between two glass sheets is degassed and heated in an autoclave to obtain a laminated glass with good visibility without bubbles due to residual air. Can be

On the other hand, windshields for automobiles, particularly windshields, have a head-up display (hereinafter referred to as H).
UD).
When a holographic element or a combiner film such as a half mirror, a rotator film or the like is used to form the hologram element, a hologram sheet is adhered to a part of the windshield.

When a HUD is provided on a windshield,
It is easy to attach a combiner film consisting of a hologram element etc. to the glass surface inside the car using a double-sided adhesive sheet, etc., but it is easy to damage the combiner surface or to deteriorate the adhesive layer due to changes in the indoor environment. There's a problem. Japanese Patent Application Laid-Open No. H10-107702 discloses a display device that not only does not produce a double image when used in a HUD but also allows a display image to be clearly recognized.
In the display device disclosed in Japanese Patent Application Laid-Open No. 115802/115, the combiner film is attached to the lamination surface side of the laminated glass and is internally provided by being sandwiched and integrated.

[0009] In other words, Japanese Patent Application Laid-Open No. H10-115802 discloses that an optical rotator layer, a translucent reflection layer, and a rotator layer are provided on the indoor side or on the outdoor side of a laminated glass in which two transparent plate-like bodies are bonded with an intermediate film. To laminated glass in which optical rotator layers are laminated in order,
A display device, characterized in that display information from a display device is polarized into a P-wave and radiated at an angle near the Brewster angle, and reflected on the display device for display. An optical rotator layer is adhered to the interior and exterior surfaces of the laminated glass in which the bodies are bonded with an interlayer, and a translucent reflective layer is laminated on at least one of the optical rotator layers on the surface of the interlayer. Disclosed is a display device characterized in that display information from a display device is polarized into P-waves, illuminated at an angle near the Brewster angle, reflected on the display device side, and displayed on the laminated glass. Have been.

[0010]

However, in order to produce a display device disclosed in Japanese Patent Application Laid-Open No. H10-115802, a laminated glass is required to adhere a combiner film to a laminated glass. After bonding the combiner film to the mating surface side of the glass plates, in a process after sandwiching PVB as an intermediate film between two single sheets of glass, pressurizing and heating in an autoclave to melt the PVB, the two glass plates are bonded together. Since the above-described steps for integrating are present, it has been difficult to select an adhesive that can withstand pressure and heating in an autoclave and reduced pressure between two glass plates.

In order to obtain a clear display image when the HUD is used, the adhesive is required to have a refractive index which does not change from that of glass. Requires a long life without discoloration or peeling.

In order to withstand the laminated glass manufacturing process using an autoclave, obtain a clear display image, and extend the life of the combiner sheet, the adhesive used to attach the combiner sheet to the laminated surface of the laminated glass is made of PVB.
However, usually, PVB does not exhibit tackiness or adhesiveness at a temperature lower than the softening point, and even if a combiner sheet laminated with PVB as an adhesive layer is sandwiched in a predetermined position on a windshield, the combiner sheet may be used. There is a problem that it is difficult to keep the sheet at a predetermined position on the mating surface side with good positional accuracy until the final adhesion by pressurizing and heating in the autoclave.

Further, since the combiner sheet using PVB as an adhesive layer is thin, it is not embossed on the surface of PVB, and the air between the combiner sheet and the glass surface is removed when heat-sealed in an autoclave. There is a concern that wrinkles and streaks may occur in the combiner sheet or bubbles may be formed without being noticed.

[0014]

SUMMARY OF THE INVENTION The present invention is directed to a tackiness (adhesion caused by an intermolecular force acting between the same substances being destroyed by the action of another substance) due to the absorption of water by PVB. Paying attention to showing
The surface of the VB is wetted with an appropriate amount of moisture to cause the PVB to exhibit adhesiveness, and a sheet laminated with the PVB as an adhesive layer is adhered to and adhered to a glass surface, and a laminated glass is produced in a later step. Therefore, when the sheet is heat-sealed in an autoclave, wrinkles and streaks are suppressed.

The method for sticking a sheet of the present invention can be applied to resins other than PVB as long as the resin exhibits tackiness.

PVB is a resin that exhibits tackiness by absorbing moisture, that is, a resin exhibiting tackiness by absorbing moisture. In addition, aldehydes are reacted with polyvinyl alcohol represented by PVB. It is present in polyvinyl acetal resins, cellulosic resins, and the like. In addition, even if the resin does not exhibit tackiness to moisture, by adding a tackifier having an effect of imparting tackiness by absorbing moisture, the resin may exhibit tackiness by absorbing moisture. is there.

According to the present invention, an adhesive surface of a sheet having an adhesive layer made of a resin exhibiting tackiness by absorbing moisture, and / or
Or, on the surface to be adhered to which the sheet is adhered, moisture is condensed to cause the adhesive layer of the sheet to exhibit adhesiveness, and the sheet is adhered to the surface to be adhered by attaching means. This is a method of attaching a sheet to be performed.

Further, the present invention is characterized in that the means for condensing moisture on the surface of the sheet or the surface on the side to which the sheet is adhered is a cooling device or a steam generating device. It is a method of sticking the sheet.

Further, the present invention is the above-mentioned sheet sticking method, wherein the sticking means for sticking the sheet is a pressure roller.

Further, the present invention is the above-mentioned sheet sticking method, characterized in that said sheet is a sheet having polyvinyl butyral as an adhesive layer.

Further, according to the present invention, after the bonding surface of the sheet is bonded to the bonding surface side of one glass plate of the laminated glass by the above-described bonding method of the sheet, the intermediate film and the other glass plate are laminated. A method for producing a laminated glass, wherein the adhesive layer and the intermediate film of the sheet are heated and melted by heating, and the sheet is fused and sandwiched and integrated with the glass surface.

Further, according to the present invention, the bonding surface of the sheet is bonded to the bonding surface side of one glass plate of the laminated glass by the above-described bonding method of the sheet, and the bonding layer of the sheet is formed at a temperature lower than the softening point. After drying by heating, the intermediate film and the other glass plate are stacked, and the adhesive layer and the intermediate film of the sheet are heated and melted by heating, and the sheet is fused to the glass surface and sandwiched and integrated. This is a method for producing glass.

Further, according to the present invention, the sheet may be a HUD.
Holographic projection sheet, shade sheet for shade band, colored sheet, decorative sheet printed with patterns and patterns, metal-deposited sheet such as half mirror, polarizing sheet, retardation sheet or flat lens Is a method for producing a laminated glass as described above.

For example, in order to sandwich a combiner sheet for HUD at a predetermined position on the mating surface side of a windshield of an automobile, the sheet must be maintained with high positional accuracy until final bonding by heating and pressurizing treatment in an autoclave. No. By pasting the sheet to the mating surface of the glass in advance, the sheet can be kept with good positional accuracy at the time of final bonding, and in addition, it can cause misalignment when moving, transferring, etc. until final bonding. Absent.

When PVB is heated to a temperature higher than the softening point, it functions as a heat-bonding material exhibiting adhesiveness by being melted and fused, but exhibits no adhesiveness or tackiness at a temperature lower than the softening point.

However, the present inventors have noticed that, in a working environment at a temperature lower than the softening point, PVB exhibits tackiness by absorbing moisture, and uses PVB as an adhesive layer to form a polyethylene terephthalate resin (hereinafter, referred to as an adhesive layer). , PET
Using a laminated sheet laminated with
PVB as an intermediate film after attaching to the mating surface of one glass plate that becomes a laminated glass by wetting the PVB surface
The sheet and the other glass plate were stacked, and thereafter, they were permanently bonded in an autoclave, and an attempt was made to produce a laminated glass in which the sheet was provided.

When the sheet is brought into direct contact with water, that is, when the sheet is immersed in water, the adhesive layer of the sheet absorbs too much water and the PVB layer swells, and the sheet is placed on the side of the laminated surface that becomes the inner surface of the laminated glass. After the actual adhesion by the autoclave after sticking, foaming was observed in the portion of the laminated glass where the sheet was provided.

Further, the PVB surface of the sheet is wiped with a wet cloth or the like, and moisture is transferred with a painted roll.
Although a method such as spraying with water was also performed, it was difficult to uniformly wet the entire PVB surface with an appropriate amount of moisture, and wrinkles and streaks were generated on the sheet in the laminated glass after the final adhesion by the autoclave.

If the amount of water given to the PVB surface is not too large and the entire surface is not uniformly wet, the sheet will be partially fixed to the glass surface when affixed, and the After the actual bonding, wrinkles and streaks are generated on the sheet in the laminated glass.

The present inventors have made intensive studies and found that in order to make the PVB surface, which is the bonding surface of the sheet, the entire PVB surface uniformly wet without too much water content,
It was found that it is better to condense water on the PVB surface.

That is, PV of a sheet having PVB as an adhesive layer
As a method of condensing moisture on the B side, a method of putting the sheet in a refrigerator or the like as a cooling device and cooling the sheet, taking out the sheet in a working environment, and condensing moisture in the air on the PVB surface in the working environment, or And a method of condensing the steam generated by the steam generator on the PVB surface.

Usually, in the process of manufacturing a laminated glass, the work of sandwiching an interlayer film made of PVB or the like between a pair of glasses is performed by controlling the temperature and humidity of a semi-clean room or more so as to prevent dust or the like from entering the interlayer of the laminated glass. It is performed in a clean working environment. Therefore, even when a sheet that exhibits adhesiveness by absorbing moisture is attached by the sheet attaching method of the present invention, the temperature and humidity are controlled in a quasi-clean room or higher in a clean environment so that dust and the like are not mixed. Must be done in The sticking of the sheet by the sheet sticking method of the present invention,
It is preferable to carry out the working under a temperature- and humidity-controlled working environment so that moisture easily condenses or dew on the sticking surface.

The present inventors have made intensive studies and found that the sheet may be adhered after water is condensed on the glass surface on which the film is to be adhered. It was found that the tackiness was obtained on the PVB surface in the same manner as in the case of setting.

As a method of condensing moisture on the glass surface to be adhered, a method of cooling the glass surface and condensing moisture in the air on the glass surface to be adhered, or a method of generating from a steam generator. There is a method of condensing the water vapor on the glass surface on the side to be attached.

The present inventors have made intensive studies and found that PVB
After applying a uniform amount of moisture to the PVB surface of the sheet having the adhesive layer or the surface on the side to which the sheet is to be adhered to develop adhesiveness, the sheet is attached while being pressed by a pressing means such as a pressing roller. It was found that the sheet with PVB as the adhesive layer was not easily detached from the surface to which it was adhered by adhering it to the surface to be adhered while making the foam adhere to the surface without chewing. If a pressure roller is used, the material used for the roll and the shape of the roll,
By devising the shape of the table on which the glass plate is placed,
The sheet can be efficiently and continuously stuck to curved glass for automotive window glass as well as flat glass for architectural window glass.

Further, according to the method for attaching a sheet of the present invention,
Sheets with PVB adhered to the glass surface as the adhesive layer are:
After applying moisture and applying by a pressure roller, it does not foam due to evaporation of moisture in the post-adhesion autoclave to remove moisture condensed on the glass surface excluding the part where the sheet is attached. like,
Even when heated to a temperature higher than room temperature and dried, it does not peel off, so it is preferable to heat to a temperature higher than room temperature and dry. Further, it was confirmed that the adhesive strength was further increased by heating and drying the sheet. This is an effect of bringing the sheet into close contact with the glass surface by a pressure roller at the time of sticking.

In the method of sticking a sheet of the present invention, the method of supplying water to a resin that exhibits tackiness by absorbing water is performed so that the entire resin as a sticking surface shows a uniform adhesive force. It is necessary to uniformly supply an appropriate amount of water to the adhesive surface of the sheet, and / or it is preferable to condense the water on the surface on the side to which the sheet is adhered,
Regarding the method of uniformly coagulating without unevenness, cooling the sheet or the surface to be adhered to condense moisture in the air, a hot water bath, the bonding surface of the sheet using a steam generator such as an ultrasonic type, and And / or condensing moisture on the surface on the side to which the sheet is attached.

According to the method of sticking a sheet of the present invention, HUD can be used in laminated glass for vehicle windows and architectural windows.
Holographic projection sheet, shade sheet for shade band, colored sheet, decorative sheet on which patterns and patterns are printed, metal evaporated sheet such as half mirror, polarizing sheet, retardation sheet, or for 3D image A laminated glass in which the sheet is provided with good positional accuracy is obtained by sandwiching and integrating a flat lens and the like.

For example, in Europe and the United States, besides the front window of the car, the side window of the car,
Laminated glass may also be used for the rear window. Even in such a case, according to the laminated glass manufacturing method of the present invention, a shade band light-shielding sheet, a colored sheet, a decorative sheet on which patterns and patterns are printed, a half mirror It is possible to provide a side window and a rear window with functionality and decorativeness by installing a metal vapor-deposited sheet such as the above, a flat lens, or the like inside the laminated glass with high durability.

[0040]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 (a) is a cross-sectional view of a sheet used in the method for attaching a sheet according to the present invention. Further, by the method of sticking the sheet of the present invention, after being placed and positioned in one glass plate surface constituting the laminated glass, the intermediate film and the other glass plate are stacked and subjected to pressure and heat treatment in an autoclave. FIG. 1B is a cross-sectional view of an example of a laminated glass manufactured by the above method, in which a sheet is internally provided. According to the method of sticking a sheet of the present invention, after being placed and positioned in one glass plate surface constituting a laminated glass, the interlayer film and the other glass plate are stacked and pressurized and heat-treated in an autoclave. FIG. 2 is a front view of the laminated glass for a windshield of an automobile.

The laminated glass shown in FIG. 1 and FIG.
This is one embodiment of the laminated glass produced by the method for attaching a sheet of the present invention, and the present invention is not limited to the laminated glass shown in FIGS. 1 and 2.

As shown in FIG. 1A, which is a cross-sectional view of the sheet used in the method of sticking the sheet of the present invention, the sheet 1 positioned by sticking by the sheet sticking method of the present invention. Is a sheet 1 on which a resin 2 and a functional sheet 3 that exhibit adhesiveness by absorbing moisture are laminated.

The resin 2 may exhibit tackiness by absorbing moisture under a working environment, and examples thereof include PVB.

The functional sheet 3 is a hologram projection sheet for HUD, decoration, and 3D images, a metal deposition sheet such as a half mirror, a light-shielding sheet for a shade band, a coloring sheet, a decoration sheet on which patterns and patterns are printed. , A polarizing sheet, a retardation sheet, or a flat lens, and a sheet cut into a desired shape can be used. In particular, in the case of a decorative sheet, a decorative sheet having a complicated shape can be provided inside the laminated glass with high positional accuracy by the method for attaching a sheet of the present invention.

The glass plates 4, 4 'shown in FIG. 1 (b), which is a cross-sectional view of a portion where the sheet 1 is provided inside the laminated glass by the method of attaching a sheet of the present invention, are laminated glass for a front of an automobile. In the case of (1), a float plate glass is usually used, but it can be used without particular limitation on the type of glass. In the case of a laminated glass for an automobile, PVB is usually used for the interlayer film 5.
A, a cross-linked EVA or the like may be used.

For example, a sheet 1 for HUD is a front view of an example of a laminated glass for an automobile in which a sheet is usually provided in a laminated glass by a method of attaching a sheet according to the present invention in a windshield of an automobile. As shown in (1), it is required to be arranged at a lower position in front of the driver with high positional accuracy.

The method of sticking the sheet 1 of the present invention is most suitable when the sheet 1 is provided with high positional accuracy in a laminated glass of a vehicle or the like. Further, for example, PVB is used as an adhesive layer. The seat 1 can be internally provided with high durability.

[0048]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. 1 which is a cross-sectional view of a portion where a sheet 1 is internally provided in a laminated glass by the method of attaching a sheet according to the present invention. The present invention
The present invention is not limited to the first to third embodiments. Example 1 Under a clean working environment adjusted to a room temperature of 25 ° C. and a relative humidity of 50 wt%, a plastic bag containing ice water and having a freely deformable shape is placed on the outside of a curved glass 4 having a thickness of 2 mm for a laminated glass for automobiles. After dew condensation on the mating surface side to be stuck to the surface to be adhered, PVB was used as the adhesive layer 2 in size 10c.
mx20cm, 0.05mm thick PET3 and PVB
2 is bonded to an adhesive surface 2 made of a PVB layer.
Was placed on a site where the glass surface was dewed.

When the sheet 1 was pressed by a pressure roller so that bubbles did not enter between the sheet 1 and the glass surface, P
The VB adhesive layer absorbs the condensed water and develops adhesiveness,
The sheet 1 was stuck to a predetermined position on the curved glass 4.

Thereafter, hot air is applied to the outside surface of the vehicle so as to remove water condensed on the glass surface excluding the portion where the sheet 1 is adhered, and to prevent foaming in a subsequent autoclave treatment step. The sheet 1 was dried by heating through the glass 4, but the sheet 1 was in close contact with the mating surface and the sticking position did not shift. In the affixed state, the PVB sheet 5 as an intermediate film having a thickness of 0.76 mm embossed on the surface and another curved glass 4 ′ having a thickness of 2 mm which becomes the inside of the laminated glass on the car are laminated, and the curved glass is laminated. After cutting off the portion of the PVB sheet 5 protruding from 4, 4 ', using a cutter, the PVB sheet 5 was attached to an annular exclusive device made of a rubber tube, placed in an autoclave, and the inside of the autoclave was sealed. Using a rotary pump, two pieces of curved glass 4 and 4
Degass the air during the
The temperature was kept at 130 ° C. for 1 hour while pressurizing with kg / cm ² with air. After the inside of the autoclave was cooled naturally, the pressure was gradually released, and the produced laminated glass was taken out. The sheet 1 was provided at a predetermined position in the laminated glass without any wrinkles or bubbles, and a good quality was obtained. Condition. Example 2 Size of 10 cm × 20 cm, thickness of 0.05 m, using PVB2 as an adhesive layer, refrigerated in a refrigerator room adjusted to 5 ° C.
m, a sheet 1 in which PET3 and PVB2 are laminated is taken out in a clean working environment adjusted to a room temperature of 25 ° C. and a relative humidity of 50% by weight, and is allowed to condense on the entire surface. The sheet 1 was placed on the surface to be the mating surface of the glass 4 with the adhesive layer 2 made of a PVB layer facing down.

When the sheet 1 was pressed by a pressure roller so as to prevent bubbles from entering between the sheet 1 and the glass surface, P
The VB adhesive layer 2 absorbs the dewed water and exhibits adhesiveness, and the sheet 1 is attached to the glass 4 at a predetermined attachment position.

Thereafter, the curved glass 4 is exposed to hot air from the surface outside the vehicle so as to remove water condensed on the glass surface excluding the portion where the sheet is adhered and to prevent foaming in the autoclave treatment step which is a subsequent step. And heat through
The sheet 1 was dried, but the sheet 1 was in close contact with the mating surface and the sticking position was not shifted. In the bonded state, a PVB sheet 5 as a 0.76 mm-thick intermediate film embossed on the surface and another 2 mm-thick curved glass 4 ′ serving as an inner side of the laminated glass are laminated, and the curved glass 4 After cutting off the portion of the PVB sheet 5 protruding from 4 'with a cutter, the PVB sheet 5 was attached to a ring-shaped special device made of a rubber tube, placed in an autoclave, and the autoclave was sealed. Thereafter, a laminated glass was produced under the same conditions as in Example 1.

The sheet 1 was provided in a predetermined position in the laminated glass without wrinkles or bubbles, and was in a good condition. Example 3 In a clean working environment adjusted to a room temperature of 20 ° C. and a relative humidity of 40 wt%, a size of 10 cm × PVB2 as an adhesive layer was used.
A sheet 1 having a thickness of 20 cm and a thickness of 0.05 mm in which PET3 and PVB2 are laminated is held over a steam generated from a warm bath adjusted to a temperature of 80 ° C. so that the PVB surface hits the sheet 1.
After the vapor is uniformly condensed on the entire surface, the sheet 1 is placed on the surface to be the outside facing surface of the curved glass 4 for a laminated glass for vehicles having a thickness of 2 mm with the adhesive layer made of the PVB layer 2 downward. Was placed.

When the sheet 1 was pressed with a pressure roller to prevent bubbles from entering between the sheet 1 and the glass surface, P
The VB adhesive layer 2 absorbs the condensed moisture to exhibit adhesiveness, and the sheet 1 is attached to the curved glass 4 at a predetermined attaching position.

Thereafter, the sheet 1 was dried by applying hot air to the outside of the vehicle and heating it through the glass 4 to prevent foaming in the subsequent autoclave treatment step.
The sheet 1 was in close contact with the mating surface, and the sticking position did not shift. In the attached state, a PVB sheet 5 as an intermediate film having a thickness of 0.76 mm embossed on the surface, and another thickness 2 mm on the inside of the laminated glass on the vehicle interior
Of the curved glass 4 ′, cut off the PVB sheet 5 at the portion protruding from the curved glass 4 and 4 ′, attach it to an annular special device made of a rubber tube, put it in the autoclave, and seal the autoclave. did. Thereafter, a laminated glass was produced under the same conditions as in Example 1.

The sheet 1 was provided at a predetermined position in the laminated glass without generating wrinkles or bubbles, and was in a good condition. Comparative Example 1 In a clean working environment adjusted to a room temperature of 20 ° C. and a relative humidity of 40 wt%, a size of 10 cm × PVB2 as an adhesive layer was used.
After spraying water on the PVB side surface of the sheet 1 in which PET3 and PVB2 each having a thickness of 20 cm and 0.05 mm are laminated, water is sprayed on the PVB side surface. The sheet 1 was placed with the adhesive layer composed of the PVB layer 2 facing down.

When the sheet 1 was pressed with a pressing roller so that bubbles did not enter between the sheet 1 and the glass surface, P
The VB adhesive layer 2 absorbs the sprayed water and exhibits adhesiveness, and the sheet 1 is attached to the curved glass 4 at a predetermined attaching position.

Thereafter, the curved glass is exposed to hot air from the surface outside the vehicle so as to remove water condensed on the glass surface excluding the portion where the sheet 1 is adhered, and to prevent foaming in an autoclave treatment step which is a subsequent step. 4, the sheet 1 was dried, but the sheet 1 was in close contact with the mating surface and the sticking position was not shifted. In the affixed state, a PVB sheet 5 as an intermediate film having a thickness of 0.76 mm embossed on the surface, and another curved glass 4 ′ having a thickness of 2 mm serving as an inner side of the laminated glass are laminated.
Part of PVB sheet 5 protruding from curved glass 4, 4 '
Was cut off with a cutter, attached to a special annular device made of a rubber tube, placed in an autoclave, and the inside of the autoclave was sealed. Thereafter, a laminated glass was produced in the same manner as in Example 1.

The sheet 1 in the produced laminated glass had wrinkles, and the laminated glass could not be used as a product. This is probably because the amount of water absorbed by the PVB2 was not uniform in the PVB plane, and at the same time, a part of the PVB2 that absorbed too much water was present in the PVB plane. Comparative Example 2 In a clean working environment adjusted to a room temperature of 20 ° C. and a relative humidity of 40 wt%, a size of 10 cm × PVB2 as an adhesive layer.
After wiping the PVB surface of the sheet 1 in which PET3 and PVB2 each having a thickness of 20 cm and 0.05 mm are laminated with a wet cloth,
The sheet 1 was placed on the surface to be the laminated surface of the curved glass 4 for laminated glass for automobiles having a thickness of 2 mm with the adhesive layer composed of the PVB layer 2 facing down.

When the sheet 1 was pressed with a pressure roller so as to prevent bubbles from entering between the sheet 1 and the glass surface, P
The VB adhesive layer absorbs moisture on the surface and develops adhesiveness, and the sheet 1 is stuck to a predetermined sticking position of the curved glass 4.

Thereafter, the curved glass is exposed to hot air from the outer side of the vehicle so as to remove water condensed on the glass surface excluding the portion where the sheet 1 is adhered and to prevent foaming in the autoclave treatment step which is a subsequent step. 4, the sheet 1 was dried, but the sheet 1 was in close contact with the mating surface and the sticking position was not shifted. In the affixed state, a PVB sheet 5 as an intermediate film having a thickness of 0.76 mm embossed on the surface, and another curved glass 4 ′ having a thickness of 2 mm serving as an inner side of the laminated glass are laminated.
Part of PVB sheet 5 protruding from curved glass 4, 4 '
Was cut off with a cutter, attached to a special annular device made of a rubber tube, placed in an autoclave, and the inside of the autoclave was sealed. Thereafter, a laminated glass was produced in the same manner as in Example 1.

The sheet 1 in the produced laminated glass had wrinkles and see-through distortion, and the laminated glass could not be used as a product. The amount of water absorbed in the PVB2 was not uniform in the PVB plane, and at the same time, there was a site in the PVB plane that absorbed too much water, and the PVB absorbed the water and wetted the PVB that had swollen and became soft. It is considered that when the cloth was brought into contact, the sheet 1 was deformed and the thickness became uneven. Comparative Example 4 Under a clean working environment adjusted to a room temperature of 20 ° C. and a relative humidity of 40 wt%, a roll wetted with water, which can be freely deformed into a shape along a curved surface, having a thickness of 2 mm was used as a curved glass 4 for laminated glass for automobiles. After the water is transferred to the mating surface side to be stuck to the inside surface of the car, and the PVB is used as the adhesive layer 2, the PE having a size of 10 cm × 20 cm and a thickness of 0.05 mm is formed.
The sheet 1 in which T3 and PVB2 were laminated was placed on a portion of the glass surface to which moisture was transferred, with the adhesive surface formed of the PVB layer facing down.

When the sheet 1 was pressed with a pressure roller so that bubbles did not enter between the sheet 1 and the glass surface, P
The VB adhesive layer absorbs the transferred moisture to exhibit adhesiveness, and the sheet 1 is stuck to a predetermined position on the curved glass 4.

Thereafter, hot air is applied to the outside surface of the vehicle so as to remove moisture transferred to the glass surface excluding the portion to which the sheet 1 is adhered and to prevent foaming in a subsequent autoclave treatment process. The sheet 1 was dried by heating through the glass 4, but the sheet 1 was in close contact with the mating surface, and the sticking position was not shifted. In the affixed state, a PVB sheet 5 as an intermediate film having a thickness of 0.76 mm embossed on the surface, and another curved glass 4 ′ having a thickness of 2 mm serving as an inner side of the laminated glass are laminated.
Part of PVB sheet 5 protruding from curved glass 4, 4 '
Was cut off with a cutter, attached to a special annular device made of a rubber tube, placed in an autoclave, and the inside of the autoclave was sealed. Thereafter, a laminated glass was produced in the same manner as in Example 1.

The sheet 1 in the produced laminated glass had wrinkles, and the laminated glass could not be used as a product. The water transferred on the glass surface was in an uneven adhesion state due to the difference in wettability of the glass surface, and the amount of water absorbed in the PVB2 was not uniform in the PVB surface. PV not expressed
It seems that air remained between the side B and the glass surface after the application, and the adhesion state of the sheet 1 before the autoclave treatment was not preferable.

[0066]

According to the present invention, a sheet using, as an adhesive layer, a resin which does not normally exhibit tackiness at room temperature but becomes tacky by absorbing moisture is used on the adhesive surface of the sheet. It is possible to adhere to the surface to be adhered with uniform in-plane adhesive force.

For example, a sheet having PVB as an adhesive layer can be adhered to the laminated surface side of a laminated glass by the method of laminating a sheet of the present invention, and the subsequent autoclave for producing the laminated glass can be used. Until the pressing and heating step, the position of the laminated glass on the laminated surface side is accurately maintained to simplify the manufacturing process of the laminated glass with the sheet inside and to reduce appearance defects such as bubbles, streaks or wrinkles on the sheet. The generation is suppressed, and the yield is increased.

For the resin used as the adhesive layer, for example, PV
By using B, it is possible to provide a seat with high durability in a laminated glass for vehicle windows, architectural windows, and the like.

The sheets to be provided include hologram projection sheets for HUD, decoration, and 3D images, light-shielding sheets for shade bands, coloring sheets, decorative sheets on which patterns and patterns are printed, and metal sheets such as half mirrors. Examples include a vapor deposition sheet, a polarizing sheet, a retardation sheet, and a flat lens.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of a sheet used in the method for attaching a sheet of the present invention. (B) It is sectional drawing of the site | part where the sheet | seat was installed in the laminated glass by the sheet sticking method of this invention.

FIG. 2 is a front view of an example of a laminated glass for an automobile in which a sheet is internally provided by the method for attaching a sheet according to the present invention.

[Explanation of symbols]

Reference Signs List 1 sheet 2 polyvinyl butyral (PVB) 3 functional sheet or polyethylene terephthalate (PET) 4, 4 'curved glass 5 interlayer

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B29L 31:58 B29L 31:58 (72) Inventor Takashi Yamate 1510 Oguchicho, Matsusaka-shi, Mie Central Glass Co., Ltd. F-term in glass laboratory (reference) 4F211 AA23 AD04 AD05 AG03 AH26 AK01 AK02 AM27 AM32 TA01 TA03 TC02 TD11 TH02 TH06 TH09 TJ30 TN52 TN58 TQ03 TQ10 TQ11 TW06 TW35 4G061 AA02 AA25 BA02 BA12 DA02 CD12

Claims (7)

[Claims] 1. A sheet in which water is condensed on an adhesive surface of a sheet having a resin that exhibits tackiness by absorbing moisture and / or on a surface to be adhered on which the sheet is adhered. A method for adhering a sheet, characterized in that the adhesive layer is made to exhibit tackiness and is adhered to the surface to be adhered by an adhering means. 2. The device according to claim 1, wherein the means for condensing moisture on the surface of the sheet or the surface on the side to which the sheet is to be adhered is a cooling device or a steam generating device. How to stick the sheet. 3. The method according to claim 1, wherein the sticking means for sticking the sheet is a pressure roller. 4. The method according to claim 1, wherein the sheet is a sheet using polyvinyl butyral as an adhesive layer. 5. The bonding method of a sheet according to claim 1, wherein the bonding surface of the sheet is bonded to a bonding surface of one glass plate of the laminated glass, and then the intermediate film and the other. A method for producing a laminated glass, comprising laminating the glass plates described above, heat-fusing the adhesive layer and the intermediate film of the sheet by heating, fusing the sheet to the glass surface, and holding and integrating the laminated sheet. 6. The bonding method of a sheet according to claim 1, wherein the bonding surface of the sheet is bonded to the bonding surface of one glass plate of the laminated glass, and the bonding layer of the sheet is softened. After heating and drying at a lower temperature, the intermediate film and the other glass plate are stacked, and the heating is performed to heat-melt the adhesive layer and the intermediate film of the sheet, and the sheet is fused and bonded to the glass surface to be integrated. Characteristic method of manufacturing laminated glass. 7. A metal-deposited sheet such as a hologram projection sheet for HUD, decoration, and 3D image, a light-shielding sheet for shade band, a colored sheet, a decorative sheet on which patterns and patterns are printed, and a half mirror. The method for producing a laminated glass according to claim 5, wherein the method is a polarizing sheet, a retardation sheet, or a flat lens.