WO2020116437A1 - Laminate - Google Patents

Abstract

The present invention pertains to a laminate which has a glass plate and an adhesive layer and in which: the adhesiveness force (according to JISZ0237:2009) between the adhesive layer and a resin layer is at least 4N/25 mm when the resin layer is adhered to the glass plate via the adhesive layer; a load is gradually applied to an adhesive interface between the adhesive layer and the resin layer by causing the resin layer to be relatively spaced apart, at a speed of 5 mm/min, from the laminate to which the resin layer is adhered; a relative shear offset amount between the adhesive layer and the resin layer is at least 3 mm when the maximum value of a test force required for peeling the adhesive interface has been obtained; and the adhesive layer is an optically transparent adhesive.

Description

Laminate

The present invention relates to a laminate having a glass plate and an adhesive layer.

Patent Document 1 discloses a transparent laminate used for windows such as automobiles and buildings, or for displaying displays such as liquid crystal displays. The laminated body of Patent Document 1 uses an optically transparent pressure-sensitive adhesive (OCA) as an adhesive layer for adhering a glass plate and a resin plate, and the adhesive layer has a predetermined viscoelastic property. By providing the above, it is possible to manufacture a laminate at room temperature without the need for high temperature and high pressure treatment by an autoclave.

Japanese Patent Laid-Open No. 2012-31059

However, the laminated body of Patent Document 1 is not assumed to be a large-sized laminated body (for example, a diagonal length of 0.5 m or more), and for example, a home door of a railway station, an automobile, a railway, etc. When it is applied to a large-sized opening member such as a vehicle window, there are the following problems.

That is, when the laminate is heated by sunlight or the like, a dimensional difference occurs between the glass plate and the resin plate due to the size and the difference in the coefficient of thermal expansion between the glass and the resin. As a result, there is a problem that the laminated body warps and peels off at the end portions of the laminated body. That is, the laminate of Patent Document 1 can secure the adhesive force between the pressure-sensitive adhesive layer and the resin plate if the size is small, but if the size is large, the adhesive force is insufficient especially at the end portion of the laminate. To do. As a result, the flat shape cannot be maintained or the adhesive force at the end cannot be secured, so that the above-mentioned problem occurs. The adhesion force here means a force including an adhesive force and an adhesive force.

The present invention has been made in view of the above circumstances, and in a laminated body in which a glass plate and a resin layer are laminated at room temperature via an adhesive layer, the adhesive layer and the resin layer are formed at the end of the laminated body. It is an object of the present invention to provide a laminate capable of enhancing the adhesion.

One embodiment of a laminate according to the present invention is a laminate having a glass plate and an adhesive layer in order to achieve the object of the present invention, wherein a resin layer is adhered to the glass plate via an adhesive layer. The adhesive strength between the adhesive layer and the resin layer at that time, the 90-degree peeling adhesive strength obtained by the peeling test method based on JIS Z0237:2009 is 4 N/25 mm or more, and the resin layer was adhered. In a test body obtained by cutting the laminated body into a size of 20 mm×30 mm, the glass plate and the resin layer were moved at a speed of 5 mm/min. By applying a load to the bonding interface between the adhesive layer and the resin layer by separating the adhesive layer and the resin layer, the adhesive layer and the resin layer when the maximum value of the test force for peeling the bonding interface is obtained. The relative shear displacement is 3 mm or more, and the adhesive layer is an optically transparent adhesive.

One embodiment of a laminate according to the present invention is, in order to achieve the object of the present invention, a glass plate, an adhesive layer and a resin layer is a laminate configured by laminating in order, an adhesive layer and a resin layer The adhesive strength of 90 degrees peeling adhesive strength obtained by the peeling test method based on JIS Z0237:2009 is 4 N/25 mm or more, and the laminate cut into a size of 20 mm×30 mm, The glass plate and the resin layer were placed at a speed of 5 mm/min. By applying a load to the bonding interface between the adhesive layer and the resin layer by separating the adhesive layer and the resin layer, the adhesive layer and the resin layer when the maximum value of the test force for peeling the bonding interface is obtained. The relative shear displacement is 3 mm or more, and the adhesive layer is an optically transparent adhesive.

In order to achieve the object of the present invention, one embodiment of the laminated body according to the present invention is configured by laminating a first glass plate, a first adhesive layer, a resin layer, a second adhesive layer and a second glass plate in order. And the adhesive force between the first adhesive layer and the resin layer and the adhesive force between the second adhesive layer and the resin layer, which were obtained by the peel test method according to JIS Z0237:2009. In a test body having both peeling and peeling adhesive strengths of 4 N/25 mm or more, and a laminate cut into a size of 20 mm×30 mm, the first glass plate and the resin layer were moved at a speed of 5 mm/min in the long side direction of the laminate. ． By applying a load to the bonding interface between the first adhesive layer and the resin layer by relatively separating the first adhesive layer and the resin layer, and obtaining the maximum value of the test force for peeling the bonding interface. And the resin layer have a relative shear displacement amount of 3 mm or more, and in the test body, the second glass plate and the resin layer were moved at a speed of 5 mm/min. By applying a load to the joint interface between the second adhesive layer and the resin layer by relatively separating the second adhesive layer and the resin layer, and obtaining the maximum value of the test force for peeling the joint interface. The relative shear displacement between the resin layer and the resin layer is 3 mm or more, and the first adhesive layer and the second adhesive layer are optical transparent pressure-sensitive adhesives.

In order to achieve an object of the present invention, an embodiment of a laminate according to the present invention is configured by sequentially laminating a first resin layer, a first adhesive layer, a glass plate, a second adhesive layer and a second resin layer. And the adhesive force between the first adhesive layer and the first resin layer and the adhesive force between the second adhesive layer and the second resin layer, which are in accordance with JIS Z0237:2009. The 90 degree peeling adhesive strength obtained in the peeling test method is both 4 N/25 mm or more, and in the test body obtained by cutting out the laminate to a size of 20 mm×30 mm, the glass plate and the first resin layer are A speed of 5 mm/min. By applying a load to the joint interface between the first adhesive layer and the first resin layer by separating them relatively with each other, and when the maximum value of the test force for peeling the joint interface is obtained. The relative shear displacement between the first adhesive layer and the first resin layer is 3 mm or more, and in the test body, the glass plate and the second resin layer are arranged in the long side direction of the laminate. Speed 5 mm/min. By applying a load to the joint interface between the second adhesive layer and the second resin layer by relatively separating them with each other to obtain the maximum value of the test force for peeling the joint interface. The relative shear displacement between the second adhesive layer and the second resin layer is 3 mm or more, and the first adhesive layer and the second adhesive layer are optical transparent pressure-sensitive adhesives.

According to the present invention, in a laminated body in which a glass plate and a resin layer are laminated at room temperature via an adhesive layer, the adhesion between the adhesive layer and the resin layer can be increased.

FIG. 1 is an enlarged cross-sectional view of a main part of the laminated body according to the first embodiment. FIG. 2 is an enlarged cross-sectional view of a main part of the laminated body according to the second and third embodiments. FIG. 3 is a side view of the evaluation sample reinforced by the support film. FIG. 4 is a schematic diagram of a peeling test method based on JISZ0237:2009. FIG. 5 is a table showing various physical properties of the laminates according to each example and comparative example. FIG. 6 is a schematic view of a shear adhesive strength test method. FIG. 7 is a graph showing the correlation between the peeling stress and the shear shift amount of the laminates according to each example and comparative example. FIG. 8 is an enlarged cross-sectional view of a main part of a laminated body having a five-layer structure. FIG. 9 is an enlarged cross-sectional view of a main part of a laminated body having a three-layer structure.

Hereinafter, preferred embodiments of the laminate according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an enlarged cross-sectional view of a main part of the laminated body 10 according to the first embodiment. FIG. 2 is an enlarged cross-sectional view of a main part of the laminated body 12 according to the second and third embodiments.

A laminated body 10 of Example 1 shown in FIG. 1 is a laminated body having a glass plate 14 and one adhesive layer 16, and a resin layer 18 is adhered to the glass plate 14 via the adhesive layer 16. .. The laminated body 12 of Example 2 and Example 3 shown in FIG. 2 is a laminated body having two layers of adhesive layers 20 and 22 in addition to the glass plate 14, and a resin layer with the adhesive layers 20 and 22 interposed therebetween. 18 is adhered to the glass plate 14. Examples of the glass plate 14 include unstrengthened soda-lime glass, chemically strengthened glass, or air-cooled tempered glass (also referred to as physical tempered glass). Examples of the resin layer 18 include highly transparent resins such as polycarbonate, acrylic, polypropylene, polyethylene, and cycloolefin polymer (COP). Further, the material is not limited to a transparent material and may be a non-transparent material such as CFRP (carbon fiber reinforced resin). The laminated body is not limited to a flat plate, and includes a 3D shape such as a curved surface.

In the laminated body 10 of Example 1 shown in FIG. 1, the adhesive force between the adhesive layer 16 and the resin layer 18 when the resin layer 18 is adhered to the glass plate 14 via the adhesive layer 16, the JIS Z0237: Relative shearing between the adhesive layer 16 and the resin layer 18 when the 90-degree peeling adhesive force obtained by the peel test method based on 2009 is 4 N/25 mm or more and the maximum value of the peel stress is obtained. The deviation amount is set to 3 mm or more. In addition, the maximum value of the peeling stress means a glass plate and a resin layer in a long side direction of the laminate at a speed of 5 mm/min. It means that the load is applied to the bonding interface between the adhesive layer and the resin layer and the maximum value of the test force applied to the peeling of the bonding interface is caused by the relative separation.
In addition, in a test body obtained by cutting out a laminated body to which a resin layer is adhered to a size of 20 mm×30 mm, the glass plate and the resin layer were moved at a speed of 10 mm/min. By applying a load to the bonding interface between the adhesive layer and the resin layer by separating the adhesive layer and the resin layer, the adhesive layer and the resin layer when the maximum value of the test force for peeling the bonding interface is obtained. 3 mm or more is preferable, and 4.5 mm or more is more preferable as the relative shear shift amount.

Similarly, in the laminated bodies 12 of Example 2 and Example 3 shown in FIG. 2, the adhesive layers 20 and 22 and the resin layer 18 when the resin layer 18 is adhered to the glass plate 14 via the adhesive layers 20 and 22. The adhesive layer 20 when the peeling test method based on JIS Z0237:2009 has a peeling adhesive strength of 4 N/25 mm or more and the maximum value of peeling stress is obtained. , 22 and the resin layer 18 have a relative shear displacement amount of 3 mm or more. In addition, the maximum value of the peeling stress means that a glass plate and a resin layer were cut at a speed of 5 mm/min. It means that the load is applied to the bonding interface between the adhesive layer and the resin layer and the maximum value of the test force applied to the peeling of the bonding interface is caused by the relative separation.
In addition, in a test body obtained by cutting out a laminated body to which a resin layer is adhered to a size of 20 mm×30 mm, the glass plate and the resin layer were moved at a speed of 10 mm/min. By applying a load to the bonding interface between the adhesive layer and the resin layer by separating the adhesive layer and the resin layer, the adhesive layer and the resin layer when the maximum value of the test force for peeling the bonding interface is obtained. 3 mm or more is preferable, and 4.5 mm or more is more preferable as the relative shear shift amount.

Hereinafter, using the adhesive layer 16 of Example 1, the adhesive layers 20 and 22 of Examples 2 and 3, and all seven types of adhesive layers of Comparative Examples 1 to 4, the above-mentioned adhesive force was obtained. The test comparing the shear shift amount will be described. Each adhesive layer is an optically transparent adhesive, the adhesive layer 16 of Example 1 is manufactured by AGC, product name: CCF (model number: AD24), and the adhesive layer 20 of Example 2 is manufactured by AGC, product. Name: CCF (model number: AD20), adhesive layer 22 of Example 2 manufactured by Mitsubishi Chemical Co., product name: ClearFit (model number: G6.0), adhesive layer of Comparative Example 1 manufactured by Nitto Denko Corporation, product Name: LUCIACS CS9867US, the adhesive layer of Comparative Example 4 was Tosoh Corporation, ethylene-vinyl acetate copolymer (EVA) film, product name: Mersen (model number: G7050). The adhesive layers 20 and 22 of Example 3 are both the same member as the adhesive layer 16 of Example 1, and the adhesive layer of Comparative Example 2 is the same member as the adhesive layer 22 of Example 2. The adhesive layer 3 is the same member as the adhesive layer 20 of the second embodiment.

The adhesive layer 16 and the adhesive layer 20 are acrylic pressure-sensitive adhesives obtained by ultraviolet curing a raw material containing a reactive oligomer having a molecular weight of 10,000 or more as a curable component in a considerable amount (30% or more), and its gel fraction is It was 40%.

The adhesive layer 22 and the adhesive layer of Comparative Example 1 were made of a monofunctional (meth)acrylate component having a molecular weight of 200 or less as a raw material, and were made into a (meth)acrylic acid ester-based copolymer by solution polymerization, and then three-dimensionalized by a crosslinking agent. It was an acrylic pressure-sensitive adhesive, and its gel fraction was 60% or more.

The adhesive layer of Comparative Example 4 was a thermoplastic interlayer film made of an ethylene vinyl acetate copolymer having a molecular weight of 1,000,000 or more.

90-degree peeling adhesive strength is measured by the peel test method according to JIS Z0237:2009. The details of the method are shown below.

First, as shown in FIG. 3, a total of seven types of adhesive layers corresponding to the adhesive layer 16 of Example 1, the adhesive layers 20 and 22 of Examples 2 and 3 and the adhesive layers of Comparative Examples 1 to 4 were prepared. The evaluation sample 24 was prepared. This evaluation sample 24 is cut into a size of 25 mm in width and 50 mm in length.
In the evaluation sample 24 of Comparative Example 4, the EVA film serving as the adhesive layer of Comparative Example 4 was sandwiched between the support film 28 and the polycarbonate substrate 26, placed in a vacuum pack, and preliminarily degassed. A uniform laminate was obtained by holding the mixture under a pressure of 1.3 MPa for about 1 hour. An evaluation sample 24 was obtained by cutting this laminated body into a width of 25 mm and a length of 50 mm.

The pressure-sensitive adhesive surface of each of the evaluation samples 24 was pressure-bonded to the surface 26A of a polycarbonate substrate (Carbograss (registered trademark) polish manufactured by AGC, Inc.) 26 having a thickness of 5 mm shown in FIG. The polycarbonate base material 26 corresponds to a resin layer. However, in Example 3, as the resin layer, a polycarbonate substrate (Carbograss (registered trademark) polish manufactured by AGC Co., Ltd.) having a hard coat layer containing an acrylic component on the surface was used. The adhesive layers 20 and 22 of Examples 2 and 3 were so arranged that the adhesive layer 22 was in contact with the polycarbonate substrate 26.
As pressure-bonding conditions, roll pressure-bonding was performed for 5 seconds at a pressure of 0.2 MPa in an environment of 23° C. and 65% RH corresponding to room temperature. Note that, in FIGS. 3 and 4, the same reference numeral (24) is attached to the evaluation samples for convenience.

Next, in order to suppress the elongation of the evaluation sample 24 during the peeling test, a supporting film (made by Mitsubishi Plastics Co., Ltd., DIAFOIL S-100, made of polyethylene terephthalate (PET) having a thickness of 38 μm) is attached to the non-measurement adhesive surface of the evaluation sample 24 The film) 28 was roll-pressed and left standing and cured for 1 day.

Next, using a strength measuring instrument (manufactured by Shimadzu Corporation, product name: precision universal testing machine "Autograph AG-X plus"), 90 degrees peeling adhesion of all seven types of evaluation samples 24 was measured. Specifically, the evaluation sample is obtained by pulling the support film 28 (see FIG. 4) pressure-bonded to the evaluation sample 24 against the surface 26A of the polycarbonate substrate 26 in the direction of arrow A forming 90 degrees at a peeling speed of 50 mm/min. The adhesive surface 24 to be measured is peeled off from the surface 26A of the polycarbonate substrate 26. Then, the tensile strength at this time was measured with a load cell, and the 90-degree peeling adhesive strength of the evaluation sample 24 was measured. The results are shown in "Adhesion" in the table of FIG.

According to FIG. 5, the 90-degree peeling adhesive force of the evaluation sample 24 corresponding to the adhesive layer 16 of Example 1 is 5.6 N/25 mm, and the evaluation sample corresponding to the adhesive layers 20 and 22 of Example 2 is shown. The 90-degree peeling adhesive force of 24 was 15.2 N/25 mm, and the 90-degree peeling adhesive force of the evaluation sample 24 corresponding to the adhesive layers 20 and 22 of Example 3 was 15.6 N/25 mm. On the other hand, the 90-degree peeling adhesion of the evaluation sample 24 corresponding to the adhesive layer of Comparative Example 1 was 10.3 N/25 mm, and the 90-degree peeling of the evaluation sample 24 corresponding to the adhesive layer of Comparative Example 2 was removed. The adhesive force was 15.2 N/25 mm, and the 90-degree peeling adhesive force of the evaluation sample 24 corresponding to the adhesive layer of Comparative Example 3 was 3.2 N/25 mm, which corresponds to the adhesive layer of Comparative Example 4. The peeling adhesive strength of the evaluation sample 24 was 60 N/25 mm.

ㆍMeasure the shear displacement as follows.

First, all seven types of evaluation samples corresponding to the adhesive layer 16 of Example 1, the adhesive layers 20 and 22 of Examples 2 and 3, and the adhesive layers of Comparative Examples 1 to 4 and the glass plate of the base material. The soda-lime glass plate and the polycarbonate plate corresponding to the resin layer are cut into a size of 20 mm×30 mm in advance and roll-pressed for 5 seconds at a pressure of 0.2 MPa in an environment of 23° C. and 65% RH to form a test body. The laminated body 30 shown in FIG. 6 was obtained.
In the evaluation sample of Example 3, as the polycarbonate, a polycarbonate substrate (Carbograss (registered trademark) polish manufactured by AGC Co., Ltd.) having a hard coat layer containing an acrylic component on the surface was used for evaluation. I got a sample. In the evaluation sample of Comparative Example 4, an EVA film of the same size was sandwiched between the glass plate and the polycarbonate plate cut into the size of 20 mm×30 mm, and the evaluation sample was obtained under the above heating and laminating conditions.
According to the laminated body 30 of FIG. 6, the polycarbonate plate 34 is bonded to the soda-lime glass plate 36 via the evaluation sample 32. In FIG. 6, the same reference numeral (32) is attached to the evaluation sample for convenience.

Next, using a measuring instrument (manufactured by Shimadzu Corporation, product name: precision universal testing machine "Autograph AG-X plus"), the shear displacement of the laminate 30 produced in the above process was measured under an environment of 25°C. Measure at.

First, a metal fixture (not shown) placed on the upper part of the measuring instrument grips the upper end surface of the polycarbonate plate 34 shown in FIG. At this time, the entire upper surface of the polycarbonate plate 34 is held by the upper fixture so that the load is uniformly applied to the upper surface of the polycarbonate plate 34. Similarly, a metal fixture (not shown) arranged in the lower part of the measuring instrument is made to grip the lower end surface of the soda lime glass plate 36 shown in FIG. At this time, the entire lower end surface of the soda lime glass plate 36 is held by the lower fixture so that the load is uniformly applied to the lower end surface of the soda lime glass plate 36.

Next, as indicated by arrows B and C, the polycarbonate plate 34 and the soda lime glass plate 36 are relatively separated from each other, that is, the long side direction of the laminated body 30, and the upper and lower fixtures are moved at a speed of 5 mm/min. Move relatively. By such movement, a load is applied to the bonding interface between the evaluation sample 32 and the polycarbonate plate 34, and the relative value between the evaluation sample 32 and the polycarbonate plate 34 when the maximum value of the test force for peeling at the bonding interface is obtained. The amount of shear displacement is measured. The results are shown in the graph of FIG. During the test using the measuring instrument, the load is also applied to the joint interface between the soda lime glass plate 36 and the evaluation sample 32, but the element for solving the problem of the present invention is the evaluation sample 32 and the evaluation sample 32. Since the test force is related to the peeling of the bonding interface with the polycarbonate plate 34, the test force will be described here.

The vertical axis of the graph in FIG. 7 represents the peeling stress (N/mm ² ) which is the test force for peeling the polycarbonate plate 34 from the evaluation sample 32, and the horizontal axis represents the relative strength between the evaluation sample 32 and the polycarbonate plate 34. The shear shift amount (mm) is shown. Here, the test force applied to the peeling means the peeling stress applied to the bonding interface between the evaluation sample 32 and the polycarbonate plate 34. Further, in the table of FIG. 5, in each evaluation sample 32, the relative shear displacement amount (mm) between the evaluation sample 32 and the polycarbonate plate 34 when the maximum value of the test force (N) for peeling is obtained. It is shown.

According to FIG. 5, the shear shift amount of the evaluation sample 32 corresponding to the adhesive layer 16 of Example 1 is 8.4 mm, and the evaluation sample 32 corresponding to the adhesive layers 20 and 22 of Example 2 and Example 3 is shown. The amount of shear deviation was 4.2 mm and 13.2 mm, respectively. On the other hand, the shear shift amount of the evaluation sample 32 corresponding to the adhesive layer of Comparative Example 1 is 1.4 mm, and the shear shift amount of the evaluation sample 32 corresponding to the adhesive layer of Comparative Example 2 is 1.9 mm. The amount of shear deviation of the evaluation sample 32 corresponding to the adhesive layer of Comparative Example 3 was 4.2 mm, and the amount of shear deviation of the evaluation sample 32 corresponding to the adhesive layer of Comparative Example 4 was 1.2 mm.

[Heat test]
Next, a heating test was performed in order to reproduce a state in which the laminated body was heated by sunlight or the like.

As a glass plate constituting a laminate for a heating test that reproduces the laminate 40 having a five-layer structure shown in FIG. 8, a rectangular glass plate having a length of 998 mm, a width of 998 mm, and a thickness of 0.55 mm was prepared as in Example 1 and A pair of first glass plate 42 and second glass plate 50 was prepared for each of all five types of laminates of Example 2 and Comparative Examples 1 to 3. As a resin layer sandwiched between the pair of glass plates, a rectangular polycarbonate plate 46 having a length of 1000 mm, a width of 1000 mm and a thickness of 5 mm was prepared. The polycarbonate plate used was one that had been previously dried in an oven at 80° C. for about 12 hours.

Next, a first adhesive layer 44 having a length of 996 mm and a width of 996 mm was attached to one surface of the polycarbonate plate 46 by a roll laminator machine, and a glass plate corresponding to the first glass plate 42 was also attached thereon. The first adhesive layer 44 corresponds to the adhesive layer 16 of Example 1, the adhesive layers 20 and 22 of Example 2, and all five types of adhesive layers of Comparative Examples 1 to 3, and their thicknesses are As shown in FIG.
Thereafter, this is reversed, and the second adhesive layer 48 and another glass plate corresponding to the second glass plate 50 are attached to the other surface of the polycarbonate plate 46 in the same manner as described above, and the result shown in FIG. A laminated body 40 having a layered structure was manufactured. The second adhesive layer 48 corresponds to the adhesive layer 16 of Example 1, the adhesive layers 20 and 22 of Example 2, and all five types of adhesive layers of Comparative Examples 1 to 3, and their thickness is as shown in FIG. As shown in.

According to the laminated body 40 of FIG. 8, the first glass plate 42, the first adhesive layer 44, the polycarbonate plate 46, the second adhesive layer 48, and the second glass plate 50 are laminated in this order. Further, in FIG. 8, for convenience, the same reference numeral (40) is attached to the laminated body, the same reference numeral (44) is attached to the first adhesive layer, and the same reference numeral (48) is attached to the second adhesive layer. ing.

It is for a heating test that reproduces the laminated body 60 having the three-layer structure shown in FIG. 9, and for all two types of laminated bodies corresponding to Example 3 and Comparative Example 4, the first glass plate 62 that constitutes such laminated body. A rectangular glass plate having a length of 300 mm, a width of 300 mm and a thickness of 3.0 mm was prepared. In addition, a rectangular polycarbonate plate 66 having the same dimensions as this and a thickness of 1.5 mm was prepared. As the polycarbonate plate of Example 4, a polycarbonate substrate (Carboglass (registered trademark) polish manufactured by AGC Co., Ltd.) having a hard coat layer containing an acrylic component on its surface was used. The polycarbonate plate used was one that had been previously dried in an oven at 80° C. for about 12 hours.

In Example 3, the first adhesive layer 64 having a length of 298 mm and a width of 298 mm was attached by a roll laminator machine in the same process as in Examples 1 and 2, and the first glass plate 62 was further formed thereon. Corresponding glass plates were also stuck together to obtain a laminate 60 having a three-layer structure shown in FIG.

In Comparative Example 4, an EVA film corresponding to the first adhesive layer 64 having a length of 298 mm and a width of 298 mm was sandwiched between the glass plate corresponding to the 300 mm square first glass plate 62 and the polycarbonate plate 66, and the heating was performed. Under the combined condition, a laminate 60 having a three-layer structure shown in FIG. 9 was obtained.

A heating test (conditions: standing in a constant temperature bath at 60° C. for 24 hours) was performed on the above-described seven types of laminates 40 and 60, and as the first adhesive layer 44 and the second adhesive layer 48, In the laminated body 40 using the adhesive layers of Comparative Examples 1 to 3, it was confirmed that the polycarbonate plate 46 was separated from the first adhesive layer 44 and the second adhesive layer 48 at the end portion of the laminated body 40. On the other hand, in the laminated body 40 using the adhesive layer 16 of Example 1 and the adhesive layers 20 and 22 of Example 2 as the first adhesive layer 44 and the second adhesive layer 48, the above-mentioned edge peeling does not occur. I could not confirm.
In addition, in the laminate 60 using the adhesive layer of Comparative Example 4 as the first adhesive layer 64 shown in FIG. 9, although the peeling at the edge was not confirmed, the edge of the laminate 60 warped with respect to the center. It was confirmed that the value was as large as 3.8 mm. On the other hand, in the laminated body 60 using the adhesive layer of Example 3 as the first adhesive layer 64, no edge peeling was confirmed, and the warpage was 0.2 mm, which was suppressed to a level having almost no influence. Was there.
The warp is a thread from the one long side of the test piece to the other long side on the concave side of the test piece, with the long side of the test piece standing horizontally and the short side of the test piece standing vertically. It is the distance from the center of the concave surface of the test body to the thread when the yarn is crossed.

Here, when the results of the above-mentioned heating test are verified based on the test results of the 90-degree peeling adhesive force and the shear shift amount, the adhesion of Comparative Examples 1 and 2 having high 90-degree peeling adhesive force (N/25 mm) Even if a layer is used, the amount of shear displacement (mm) is small, and therefore the adhesive layer cannot follow the thermal expansion of the polycarbonate plate 46 and expand, and it is considered that the above peeling occurred. When the adhesive layer of Comparative Example 3 was used, the shear deviation amount (mm) was larger than that of Comparative Examples 1 and 2, but the 90-degree peeling adhesive force (N/25 mm) was small. It is considered that the peeling occurred due to the stress generated during the thermal expansion.
In Comparative Example 4, the 90° peeling adhesive strength (N/25 mm) was high, and thus peeling was suppressed, but it is considered that the laminate was largely warped due to the stress applied to the adhesive layer.

On the other hand, when the adhesive layer 16 of Example 1 is used, the 90-degree peeling adhesive force (N/25 mm) is small as compared with Comparative Examples 1 and 2, but the shear displacement amount (mm) is large. Therefore, it is considered that the adhesive layer was able to follow the thermal expansion of the polycarbonate plate 46 and expand, and the above peeling did not occur. Further, when the adhesive layers 20 and 22 of Example 2 were used, the shear displacement amount (mm) was the same as that of Comparative Example 3, but the 90-degree peeling adhesive force (N/25 mm) was large, so that It is considered that the above peeling did not occur due to the stress generated during thermal expansion. Further, also in Example 4, since the amount of shear deviation was large and the 90-degree peeling adhesive strength was also high, it is considered that the warp could be suppressed even in the asymmetrical laminated structure having the three-layer structure as shown in FIG. ..

Based on the above verification results, the peeling phenomenon of the resin layer with respect to the adhesive layer is controlled not only by the 90 degree peeling adhesive force (N/25 mm) but also by the shear shift amount (mm). It turned out to be Further, the shear shift amount can also be expressed as elongation force. Further, it is preferable that the 90-degree peeling adhesive strength (N/25 mm) is 4 N/25 mm or more, and the shear displacement is 3 mm or more, which are suitable values for achieving the object of the present invention. found.

Not only when the laminated body has a configuration in which the first glass, the first adhesive layer, the resin layer, the second adhesive layer, and the second glass plate are sequentially laminated as described above, the first resin layer, the first resin layer, and the first resin layer Similarly, in the case where the adhesive layer, the glass plate, the second adhesive layer, and the second resin layer are laminated in this order, the 90-degree peeling adhesive force (N/25 mm) between the adhesive layer and the resin layer is 4 N/ A value of 25 mm or more and a shear displacement amount of 3 mm or more are suitable numerical values for achieving the object of the present invention.
In this case, the 90-degree peeling adhesive force means the 90-degree peeling adhesive force between the first adhesive layer and the first resin layer, and the 90-degree peeling adhesive force between the second adhesive layer and the second resin layer. Both are 4 N/25 mm or more. In addition, the shear displacement amount means that the relative shear displacement amount between the first adhesive layer and the first resin layer and the relative shear displacement amount between the second adhesive layer and the second resin layer are both 3 mm or more. Means there is.

Therefore, according to the laminated body 10 of Example 1, the laminated body 12 of Example 2, and the laminated body 60 of Example 3, the 90-degree peeling adhesive force (N/25 mm) is 4 N/25 mm or more, Moreover, since the shear displacement amount (mm) is set to 3 mm or more, in a laminated body in which a glass plate and a resin layer are laminated at room temperature via an adhesive layer, an adhesive layer is formed at an end portion of the laminated body. It is possible to enhance the adhesion with the resin layer. As a result, the present invention can be applied to home doors, windows of vehicles such as automobiles and railroads, etc. as a large-sized opening member that requires a diagonal length of 0.5 m or more, particularly 1 m or more.
The 90-degree peeling adhesive strength (N/25 mm) is preferably 5 N/25 mm or more, more preferably 10 N/25 mm or more, still more preferably 15 N/25 mm or more. The upper limit of the 90-degree peeling adhesive strength (N/25 mm) is not particularly limited, but may be 50 N/25 mm or less.
The shear displacement (mm) is preferably 4 mm or more, more preferably 8 mm or more. The upper limit of the shear displacement (mm) is not particularly limited, but may be 15 mm or less. Further, the speed of relatively separating is 10 mm/min. In such a case, the shear displacement amount is preferably 3 mm or more, more preferably 4.5 mm or more, further preferably 8 mm or more, and particularly preferably 12 mm or more. The speed of relatively separating is 10 mm/min. In this case, the upper limit of the shear displacement amount is not particularly limited, but may be 25 mm or less.

Further, as the first adhesive layer 44 and the second adhesive layer 48 of FIG. 8, the adhesive layer 16 of the laminate 10 of Example 1 or the adhesive layers 20 and 22 of the laminate 12 of Example 2 are applied to the laminate 40. However, since the above 90 degree peeling adhesive strength (N/25 mm) is 4 N/25 mm or more and the shear displacement amount (mm) is set to 3 mm or more, the glass plate at room temperature is In the laminated body in which the resin layer and the resin layer are laminated via the adhesive layer, the adhesion between the adhesive layer and the resin layer can be increased. Thereby, the same effects as those of the laminated body 10 of the first embodiment and the laminated body 12 of the second embodiment can be obtained.

Further, in the present embodiment, the content of the component having a low glass transition point Tg in the adhesive layer is preferably 5% or more with respect to the entire adhesive layer. Thereby, the adhesive force of the resin layer and the glass plate to the adhesive layer can be improved. The content of the component having a low glass transition point Tg in the adhesive layer is preferably 8% or more, more preferably 10% or more, based on the entire adhesive layer. The upper limit of the content of the component having a low glass transition point Tg in the adhesive layer is not particularly limited, but may be 40% or less.

Further, in this embodiment, the content of the plasticizer component in the adhesive layer is preferably 40% or less with respect to the entire adhesive layer. The smaller the content of the plasticizer component in the adhesive layer, the greater the 90-degree peeling adhesive strength and the shear deviation between the adhesive layer and the resin layer. The content of the plasticizer component in the adhesive layer is more preferably 20% or less with respect to the entire adhesive layer. The upper limit of the content of the plasticizer component in the adhesive layer is not particularly limited, but may be 1% or less.

In addition, the adhesive layer of the present embodiment is not limited to the acrylic adhesive, and for example, a silicone adhesive, a rubber adhesive, or a urethane adhesive can be used.

Also, the adhesive layer of the present embodiment preferably contains a silane coupling agent. Thereby, the mechanical strength of the laminate can be improved. The adhesive layer containing a silane coupling agent means that the adhesive layer is mixed with the silane coupling agent, the surface layer of the adhesive layer is coated with the silane coupling agent, and the adhesive layer is adhered to the adhesive layer. It includes a form in which a silane coupling agent is applied to the surface layer of the resin layer. As the silane coupling agent, acrylic silane having a functional group capable of reacting with the adhesive layer is preferable. As a result, the adhesive force at the interface between the resin layer and the adhesive layer can be improved and peeling at the bonded interface can be suppressed. Further, as a method of surface treatment without using a silane coupling agent, there is a treatment of forming a thin film of silicon oxide through an oxidative flame by a frame burner.

The adhesive layer of this embodiment may further contain an additive such as an ultraviolet absorber. As a result, when the laminate is used in an environment where it is exposed to sunlight, such as outdoors, deterioration of quality such as brittleness and yellowing caused by decomposition of the resin layer due to short wavelength light contained in sunlight Can be suppressed. Any material can be used as the ultraviolet absorber, but in consideration of the transparency of the laminate, the transmittance of the entire laminate is 70% or more at a wavelength of 420 to 700 nm. It is preferably designed as follows. In this case, it is preferable that the deviation of the transmittance value is less than 10% in the wavelength region. As a means for achieving the above, it is also possible to add a complementary color agent to the resin layer.

Moreover, the laminated body of this embodiment may have two or more adhesive layers. In that case, the 90-degree peeling adhesive force between the adhesive layer arranged on the resin layer side and the resin layer is 4 N/25 mm or more, and the shear peel strength between the adhesive layer arranged on the resin layer side and the resin layer is high. In the evaluation, the shear displacement amount may be 3 mm or more. In this case, it is preferable that the adhesive force between the two adhesive layers has physical properties higher than the adhesive force between the adhesive layer and the resin layer. Thereby, when the resin layer expands in a high temperature environment, the peeling of the end portion can be suppressed by the relaxing effect of the adhesive layer arranged on the glass plate side while maintaining the adhesive state between the resin layer and the adhesive layer.
Further, the laminate of the present embodiment may have a thermoplastic interlayer film between the adhesive layer and the glass plate or the resin layer. Examples of the thermoplastic interlayer film include polyvinyl butyral (PVB), EVA or COP, thermal polyurethane, thermoplastic polyurethane, and ionomer-based films which are used for general laminated glass. This makes it possible to impart properties such as impact resistance, ultraviolet resistance, and penetration resistance.

From the viewpoint of weight reduction, the glass plate of the present embodiment preferably has a thickness of 3 mm or less. The thickness of the glass plate is preferably 70% or less with respect to the total thickness of the laminate. Further, the thickness of the glass plate is preferably thinner than the thickness of the resin layer. Since this makes it possible to reduce the weight of the laminated body, it is also applicable to the movable opening member such as the above-mentioned platform doors, windows of vehicles such as automobiles and railroads. The thickness of the glass plate is preferably 3 mm or less, more preferably 1.1 mm or less, and particularly preferably 0.7 mm or less. By doing so, the weight of the glass single plate having the same thickness can be reduced to about 60% or less.
Further, from the viewpoint of the rigidity of the laminate, the thickness of the glass plate is preferably 2 mm or more. For example, when it is supposed to be used as an opening of a moving body, strong impact may be applied to the laminated body due to strong wind pressure when passing through a tunnel or when vehicles pass each other. Also in that case, the influence of warpage and cracks can be suppressed by maintaining the rigidity of the laminated body. Thus, the thickness of the glass plate can be arbitrarily set depending on the application.

Also, the thickness of the adhesive layer is preferably 50 μm or more, and preferably less than 3 mm. When the thickness is 50 μm or more, even if bubbles remain at the interface with the glass plate or the resin layer during bonding, they are likely to disappear. Moreover, if the thickness is less than 3 mm, the rigidity of the laminate can be ensured. In particular, when the laminated body becomes large, handling becomes easy. The thickness of the adhesive layer is more preferably 100 μm or more, and particularly preferably 200 μm or more. Further, the thickness of the adhesive layer is more preferably 2 mm or less, and particularly preferably 1 mm or less. Within the above range, it is possible to alleviate internal stress applied to the adhesive layer due to the dimensional difference generated between the glass plate and the resin layer in a high temperature environment, and to ensure bubble extinction during bonding and rigidity of the laminate. It is possible.

A value obtained by dividing the shear displacement (unit: mm) by the thickness of the adhesive layer (unit: mm) is preferably 10 mm/mm or more. If the value obtained by dividing the shear displacement (unit: mm) by the thickness of the adhesive layer (unit: mm) is 10 mm/mm or more, the adhesion between the adhesive layer and the resin layer at the end of the laminate can be increased. it can. The value obtained by dividing the shear displacement (unit: mm) by the thickness of the adhesive layer (unit: mm) is more preferably 20 mm/mm or more, further preferably 30 mm/mm or more. The upper limit of the value obtained by dividing the shear displacement (unit: mm) by the thickness of the adhesive layer (unit: mm) is not particularly limited, but may be 50 mm/mm or less.

The shape of the laminated body of the present embodiment is not particularly limited, but may be a quadrangle, preferably a rectangle. The rectangular shape is easy to apply to an opening member such as a home door of a railway station, a window of a vehicle such as an automobile or a railroad. Further, the glass plate and the resin layer may have a notch at a part of a corner between the end surface and the main surface when the respective sections are viewed in cross section. For example, the presence of the notch allows the surface of the laminate to be fitted so as to be flush with the surface of the vehicle when it is incorporated into the vehicle, which leads to improved fuel efficiency.

As the structure of the laminate of the present embodiment, a pair of glass plates in the outermost layer, a five-layer structure in which a resin layer is arranged inside via an adhesive layer, or a pair of resin layers in the outermost layer, via an adhesive layer A symmetric structure such as a five-layer structure in which a glass plate is arranged inside can be mentioned. The symmetrical structure is preferable because the stress applied to the adhesive layer can be canceled by the dimensional difference between the glass plate and the resin layer caused by heating even when a large opening member is assumed.
Even with an asymmetrical configuration in which a glass plate is disposed on one outermost layer and a resin layer is disposed on the other outermost layer via an adhesive layer, the configuration of this embodiment causes warpage and peeling at the end. It is preferable since it can be suppressed and can be stably used even in a high temperature environment.

In the structure of the laminated body of the present embodiment, a functional film or film having heat ray reflection, a screen, and dimming performance may be further enclosed. Examples of the functional film as described above include a PET substrate provided with a sputtered film or a functional layer capable of selectively reflecting an arbitrary wavelength with a liquid crystal polymer. It is also possible to directly form the functional layer on the adhesive layer without using the PET base material.

Further, in the case of the laminate of the present embodiment having a rectangular shape, the diagonal length is preferably 0.5 m or more, more preferably 1 m or more. If the diagonal length is 0.5 m or more, it can be applied to large-sized opening members such as platform doors of railway stations, windows of vehicles such as automobiles and railways.

Further, in the case of a rectangular shape, the laminate of the present embodiment preferably has a short side length of 300 mm or more, and more preferably 700 mm or more. If the length of the short side is 300 mm or more, it can be applied to large-sized opening members such as platform doors of railway stations, windows of vehicles such as automobiles and railways.

Further, as the resin layer of the present embodiment, it is preferable to use a resin layer provided with a hard coat layer as a surface treatment. Examples of the material for forming the hard coat layer include acrylic compounds including urethane, epoxy, and polyester compounds, epoxy resins, vinyl ether compounds, and oxetane compounds. In particular, when a material having a reactive component such as an acrylic compound is contained as a hard coating agent, the SP value (solubility parameter) becomes close to that of the adhesive layer component, or both react to increase the adhesive force between layers, resulting in high temperature. Edge peeling in the environment can be suppressed.

Here, an example for obtaining the 90-degree peeling adhesive strength (N/25 mm) specified in this embodiment will be described.

　In order to secure 90-degree peeling adhesive strength to the base material, it is desirable to contain a component with a low glass transition point Tg as a raw material. Examples of the component having a low glass transition point Tg include monomers having a molecular weight of 125 to 600. Here, the component having a low glass transition point Tg is a component having a glass transition point Tg of 0° C. or lower. For example, as an acrylic monomer, a (meth)acrylic acid alkyl ester having an alkyl group having 4 to 12 carbon atoms, methoxymethyl (meth)acrylate, ethoxymethyl (meth)acrylate, methoxyethyl (meth)acrylate, Examples thereof include alkoxyalkyl (meth)acrylates such as ethoxyethyl (meth)acrylate, and one or more of them can be used. Note that (meth)acrylic acid means at least one of acrylic acid and methacrylic acid.

Further, it is important that the storage shear modulus G′ (also referred to as storage modulus) at an environmental temperature of 25° C. and a frequency of 1 Hz is in the range of 5×10 ³ to 5×10 ⁵ Pa. When the adhesive layer has the above physical properties, the cohesive force of the adhesive layer can be maintained at a level that can withstand a practical use environment. The practical use environment may be a cycle of high temperature, high humidity, low temperature to high temperature, or the like.
In order to keep the storage shear modulus within the above range, the content ratio of the component having a low glass transition point Tg is preferably 30% or less with respect to all the curable components contained in the adhesive layer. By setting it to 30% or less, it is possible to prevent the storage shear elastic modulus from exceeding 5×10 ⁵ Pa and prevent bubbles from remaining at the interface and becoming a defect when laminated with a glass plate or a resin layer. it can. Another advantage of setting the storage shear elastic modulus of the adhesive layer in the above range is that the warpage of the laminate in a high temperature environment such as 60 degrees can be suppressed. In particular, in the case of assuming an asymmetrical structure in which a glass plate and a resin layer are respectively arranged as outermost layers as a laminated body, warpage is likely to occur in a high temperature environment due to a dimensional difference generated between the glass plate and the resin layer. Even in that case, by setting the storage shear elastic modulus of the adhesive layer in the above range, it can be applied to a window member having a large opening. Particularly preferably, the storage shear elastic modulus G′ is 2×10 ⁴ to 3×10 ⁵ Pa. Accordingly, even when assuming that the adhesive layer is a thick film having a thickness of 1 mm or the like, the adhesive layer alone can be stably handled, and the rigidity of the laminated body can be secured.

▽It is also important to make the SP values of the adhesive layer and resin layer close to each other as a method of increasing the 90-degree peeling adhesive strength. As a preferable range, the difference between the SP values of the both is preferably 5 or less. Further, it is possible to have a 90-degree peeling adhesive force defined by using an adhesive layer containing a modifier such as tackifier. When two different kinds of adhesive layers as shown in FIG. 2 are laminated, the storage shear elastic modulus G'indicates bulk physical properties in a structure in which two layers are laminated.

The storage shear modulus G′ of each evaluation sample 32 is shown in the table of FIG. The storage shear modulus evaluation sample 32 is measured as follows.
The storage shear modulus evaluation sample 32 of each adhesive layer was measured using a rheometer (Physica MCR301 manufactured by Anton Paar). An OCA film to be each adhesive layer was sandwiched between a stage made of soda lime glass and a measuring spindle, a dynamic shear strain of 1% was applied, the measurement frequency was set to 1 Hz, and measurement was performed in an environment of 25°C ..

Further, an example for obtaining the shear displacement amount (mm) specified in the present embodiment will be described. As a design guideline for obtaining an adhesive layer having a large amount of shear displacement, it is common to use a resin design that has a relatively low crosslink density and a three-dimensional structure with a large gel fraction. The gel fraction is preferably 20% or more and 50% or less. When the gel fraction of the adhesive layer is 50% or less, the crosslinking density is prevented from becoming too high and the shear shift amount is insufficient, and peeling failure occurs even in the state where the laminate is heated by sunlight or the like. Can be suppressed. Further, when the gel fraction is 50% or less, the adhesive force can be enhanced without curing the adhesive layer by ultraviolet irradiation. On the other hand, when the gel fraction is 20% or more, the elastic modulus of the adhesive layer is prevented from becoming too low, and it becomes easy to handle it as a self-supporting film.
For example, a polymer using a reactive component having a large molecular weight such as a urethane oligomer as a raw material is particularly effective. The reactive oligomer preferably has a number average molecular weight of 1,000 to 100,000, more preferably 10,000 or more, and further preferably 70,000 or less.
From the viewpoint of mechanical properties of the adhesive layer, it is preferable that one molecule has an average of 1.8 to 4 reactive functional groups. In addition to the urethane oligomer, examples of the reactive oligomer include poly(meth)acrylate of polyoxyalkylene polyol and poly(meth)acrylate of polyester polyol. Here, the (meth)acrylate means at least one of acrylate and methacrylate.

It is also effective to add a plasticizer as another method for obtaining the shear displacement amount (mm) specified in this embodiment. Examples of the plasticizer include esterified products, polyols, esterified products thereof, soft acrylic resins, elastomers, and the like. Tackifiers such as terpene resin are generally known. As an adverse effect on the use of the plasticizer, there is a case where the adhesion to the glass plate or the base material corresponding to the resin layer is reduced. To prevent this, the content of the plasticizer component in the adhesive layer is preferably 40% or less. Further, the use of supramolecules such as slide ring materials is also effective in obtaining an adhesive layer having a large shear displacement amount.

When the adhesive layer of the present embodiment is composed of a laminate of two or more adhesive layers, the difference in the content of the plasticizer with respect to the entire composition constituting the adhesive layer between the adhesive layers is less than 40%. Is preferable, and less than 20% is more preferable. When the difference in the content of the plasticizer between the two adhesive layers is large, the plasticizer component migrates from the adhesive layer having a large content of plasticizer to the side of the adhesive layer having a small content of the plasticizer, particularly the resin layer and the adhesive layer. It may cause a decrease in adhesion with. In addition, in some cases, the haze of the adhesive layer may increase, which may affect the transparency of the laminate.

Although the present invention has been described in detail and with reference to particular embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. This application is based on the Japanese patent application filed on Dec. 6, 2018 (Japanese Patent Application No. 2018-229153), the contents of which are incorporated herein by reference.

10... Laminated body, 12... Laminated body, 14... Glass plate, 16... Adhesive layer, 18... Resin layer, 20... Adhesive layer, 22... Adhesive layer, 24... Evaluation sample, 26... Polycarbonate base material, 28... Support film , 30... Laminated body, 32... Evaluation sample, 34... Polycarbonate plate, 36... Soda-lime glass plate, 40... Laminated body, 42... First glass plate, 44... First adhesive layer, 46... Polycarbonate plate, 48... 2 adhesive layer, 50... 2nd glass plate, 60... laminated body, 62... 1st glass plate, 64... 1st adhesive layer, 66... Polycarbonate plate

Claims (25)

1. A laminate having a glass plate and an adhesive layer,
   It is the adhesive force between the adhesive layer and the resin layer when the resin layer is adhered to the glass plate via the adhesive layer, and the 90-degree peeling obtained in the peel test method according to JIS Z0237:2009. Adhesive force is 4N/25mm or more,
   In addition, in the test body obtained by cutting the laminated body to which the resin layer is adhered into a size of 20 mm×30 mm, the glass plate and the resin layer are moved at a speed of 5 mm/min. By applying a load to the bonding interface between the adhesive layer and the resin layer by relatively separating the adhesive layer and the adhesive layer when the maximum value of the test force for peeling the bonding interface is obtained. And the relative shear displacement between the resin layer and the resin layer is 3 mm or more,
   A laminate, wherein the adhesive layer is an optically transparent pressure-sensitive adhesive.
2. In a test body obtained by cutting the laminated body to which the resin layer is adhered into a size of 20 mm×30 mm, the glass plate and the resin layer are moved in the longitudinal direction of the laminated body at a speed of 10 mm/min. By applying a load to the bonding interface between the adhesive layer and the resin layer by relatively separating the adhesive layer and the adhesive layer when the maximum value of the test force for peeling the bonding interface is obtained. The laminate according to claim 1, wherein the relative shear displacement between the resin layer and the resin layer is 3 mm or more.
3. A laminated body constituted by laminating a glass plate, an adhesive layer and a resin layer in order,
   The adhesive force between the adhesive layer and the resin layer, the 90-degree peeling adhesive force obtained by the peeling test method based on JIS Z0237:2009 is 4 N/25 mm or more,
   In addition, in a test body obtained by cutting the laminated body into a size of 20 mm×30 mm, the glass plate and the resin layer were moved in the long side direction of the laminated body at a speed of 5 mm/min. By applying a load to the bonding interface between the adhesive layer and the resin layer by relatively separating the adhesive layer and the adhesive layer when the maximum value of the test force for peeling the bonding interface is obtained. And the relative shear displacement between the resin layer and the resin layer is 3 mm or more,
   A laminate, wherein the adhesive layer is an optically transparent pressure-sensitive adhesive.
4. In a test body obtained by cutting the laminate into a size of 20 mm×30 mm, the glass plate and the resin layer were moved at a speed of 10 mm/min in the long side direction of the laminate. By applying a load to the bonding interface between the adhesive layer and the resin layer by relatively separating the adhesive layer and the adhesive layer when the maximum value of the test force for peeling the bonding interface is obtained. The laminate according to claim 3, wherein the relative shear displacement between the resin layer and the resin layer is 3 mm or more.
5. The laminate according to any one of claims 1 to 4, wherein a value obtained by dividing the shear displacement amount (unit: mm) by the thickness of the adhesive layer (unit: mm) is 10 mm/mm or more.
6. The laminate according to any one of claims 1 to 5, wherein the gel fraction of the adhesive layer is 20% or more and 50% or less.
7. The laminate according to any one of claims 1 to 6, wherein the content of the plasticizer component in the adhesive layer is 40% or less.
8. The laminate according to any one of claims 1 to 7, wherein the adhesive layer contains a silane coupling agent.
9. The laminate according to any one of claims 1 to 8, wherein the adhesive layer is composed of two or more layers.
10. The laminate according to any one of claims 1 to 9, wherein the glass plate has a thickness of 3 mm or less.
11. The laminate according to any one of claims 1 to 10, wherein the laminate has a rectangular shape and a diagonal length of 0.5 m or more.
12. A laminated body configured by laminating a first glass plate, a first adhesive layer, a resin layer, a second adhesive layer and a second glass plate in order,
    90 degree peeling adhesion obtained by a peeling test method based on JIS Z0237:2009, which is the adhesive force between the first adhesive layer and the resin layer and the adhesive force between the second adhesive layer and the resin layer. Both forces are 4N/25mm or more,
    In addition, in a test body obtained by cutting the laminated body into a size of 20 mm×30 mm, the first glass plate and the resin layer were moved at a speed of 5 mm/min. By applying a load to the joint interface between the first adhesive layer and the resin layer by relatively separating the joint layer from each other, and obtaining the maximum value of the test force for peeling the joint interface. The relative shear displacement between the first adhesive layer and the resin layer is 3 mm or more,
    In the test body, the second glass plate and the resin layer were moved at a speed of 5 mm/min. By applying a load to the bonding interface between the second adhesive layer and the resin layer by relatively separating the two bonding layers with each other to obtain the maximum value of the test force for peeling the bonding interface. The relative shear displacement between the second adhesive layer and the resin layer is 3 mm or more,
    A laminated body, wherein the first adhesive layer and the second adhesive layer are optical transparent pressure-sensitive adhesives.
13. In a test body obtained by cutting the laminate into a size of 20 mm×30 mm, the first glass plate and the resin layer were moved at a speed of 10 mm/min. By applying a load to the joint interface between the first adhesive layer and the resin layer by relatively separating the joint layer from each other, and obtaining the maximum value of the test force for peeling the joint interface. The relative shear displacement between the first adhesive layer and the resin layer is 3 mm or more,
    In the test body, the second glass plate and the resin layer were moved at a speed of 10 mm/min. By applying a load to the bonding interface between the second adhesive layer and the resin layer by relatively separating the two bonding layers with each other to obtain the maximum value of the test force for peeling the bonding interface. The laminate according to claim 12, wherein a relative shear displacement amount between the second adhesive layer and the resin layer is 3 mm or more.
14. The laminated body according to claim 12 or 13, wherein the thickness of the first glass plate and the second glass plate is 3 mm or less.
15. The laminate according to any one of claims 12 to 14, wherein the first glass plate and the second glass plate have a thickness smaller than that of the resin layer.
16. A laminated body configured by laminating a first resin layer, a first adhesive layer, a glass plate, a second adhesive layer, and a second resin layer in order,
    The adhesive force between the first adhesive layer and the first resin layer and the adhesive force between the second adhesive layer and the second resin layer, which were obtained by a peel test method according to JIS Z0237:2009. Both the peeling and peeling adhesive strength is 4N/25mm or more,
    In addition, in a test body obtained by cutting the laminated body into a size of 20 mm×30 mm, the glass plate and the first resin layer were moved in the long side direction of the laminated body at a speed of 5 mm/min. By applying a load to the joint interface between the first adhesive layer and the first resin layer by separating them relatively with each other, and when the maximum value of the test force for peeling the joint interface is obtained. The relative shear displacement between the first adhesive layer and the first resin layer is 3 mm or more,
    In the test body, the glass plate and the second resin layer were moved at a speed of 5 mm/min. By applying a load to the joint interface between the second adhesive layer and the second resin layer by relatively separating them with each other to obtain the maximum value of the test force for peeling the joint interface. The relative shear displacement between the second adhesive layer and the second resin layer is 3 mm or more,
    A laminated body, wherein the first adhesive layer and the second adhesive layer are optical transparent pressure-sensitive adhesives.
17. In a test body obtained by cutting out the laminate to a size of 20 mm×30 mm, the glass plate and the first resin layer were moved at a speed of 10 mm/min. By applying a load to the joint interface between the first adhesive layer and the first resin layer by separating them relatively with each other, and when the maximum value of the test force for peeling the joint interface is obtained. The relative shear displacement between the first adhesive layer and the first resin layer is 3 mm or more,
    In the test body, the glass plate and the second resin layer were moved at a speed of 10 mm/min. By applying a load to the joint interface between the second adhesive layer and the second resin layer by relatively separating them with each other to obtain the maximum value of the test force for peeling the joint interface. 17. The laminate according to claim 16, wherein the relative shear displacement between the second adhesive layer and the second resin layer is 3 mm or more.
18. The laminate according to claim 16 or 17, wherein the glass plate has a thickness of 3 mm or less.
19. The laminate according to any one of claims 16 to 18, wherein the glass plate has a thickness smaller than that of the first resin layer and the second resin layer.
20. The laminate according to any one of claims 12 to 19, wherein a value obtained by dividing the shear displacement (unit: mm) by the thickness of the adhesive layer (unit: mm) is 10 mm/mm or more.
21. The laminate according to any one of claims 12 to 20, wherein the content of the plasticizer component in each of the first adhesive layer and the second adhesive layer is 40% or less.
22. The laminate according to any one of claims 12 to 21, wherein the first adhesive layer and the second adhesive layer contain a silane coupling agent.
23. The laminate according to any one of claims 12 to 22, wherein at least one of the first adhesive layer and the second adhesive layer is composed of two or more layers.
24. The laminate according to claim 23, wherein the adhesive layer composed of two or more layers has a plasticizer content difference of less than 40% with respect to the entire composition forming the adhesive layer between the adhesive layers.
25. The laminate according to any one of claims 12 to 24, wherein the laminate has a rectangular shape and a diagonal length of 0.5 m or more.

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