JP6561588B2 - Organic glass laminate including heating wire layer - Google Patents

Description

  The present invention relates to an organic glass laminate including a heating wire layer. More specifically, the present invention is an organic glass laminate including a heating wire layer, and has excellent wear resistance and weather resistance, while suppressing whitening of the adhesive layer due to heat generation of the heating wire layer, and sufficient The present invention relates to an organic glass laminate that can ensure a good visibility. Furthermore, this invention relates to the manufacturing method of the organic glass laminated body which uses the sheet | seat for organic glass lamination | stacking used in order to manufacture the said organic glass laminated body, and the said sheet | seat for organic glass lamination | stacking.

  Conventionally, polycarbonate, polymethyl methacrylate, polyacrylate, polyethylene terephthalate, polyethylene naphthalate, polyolefin, ABS, and the like are known as resin materials for organic glass. Among these, polycarbonate has excellent transparency, mechanical strength, workability, lightness, and heat resistance, and has been attempted to be used as a resin glass for vehicles and windows of buildings. On the other hand, organic glass has low thermal conductivity, and when condensation or fogging occurs on windows made of organic glass, it is difficult to remove with the heat naturally generated by vehicles and buildings, and the field of view is There is a drawback of being disturbed.

  Therefore, conventionally, an organic glass has been developed that can remove dew condensation and fogging by arranging a heating wire layer on the organic glass and causing a current to flow through the heating wire layer to generate heat. For example, Patent Document 1 discloses a vehicle resin glass in which a transparent conductive layer functioning as a heating wire is formed on a transparent resin substrate, and a primer layer and a hard coat layer are sequentially provided thereon.

  Moreover, in patent document 1, the aspect which forms a transparent conductive layer directly on a transparent resin substrate in the said resin glass for vehicles, and the aspect which forms a transparent conductive layer on a transparent resin substrate through an contact bonding layer are disclosed. Yes. However, in the embodiment in which the transparent conductive layer is directly formed on the transparent resin substrate, the transparent conductive layer, the primer layer, and the hard coat layer may be sequentially laminated on the transparent resin substrate that is rigid and relatively difficult to handle. It is necessary and has drawbacks in terms of manufacturing simplicity. On the other hand, in the embodiment in which the transparent conductive layer is formed on the transparent resin substrate via the adhesive layer, after forming the transparent conductive layer, the primer layer, and the hard coat layer using a film having low rigidity and easy handling, these Since these layers are collectively bonded to the transparent resin substrate via the adhesive layer, there is an advantage that the production can be easily performed. However, when the adhesive layer is interposed between the transparent conductive layer and the transparent resin substrate as described above, it is required to design the adhesive layer so that the adhesive layer is not adversely affected by the heat generated by the transparent conductive layer. In No. 1, no design guideline for the adhesive layer based on this viewpoint is shown.

  Furthermore, in Patent Document 1, the transparent conductive layer that functions as a heating wire is formed using a metal paste containing metal fine particles and a binder resin. However, when the metal paste is used, the resistance increases. There are drawbacks. Therefore, in the technique of Patent Document 1, in order to achieve sufficient heat generation efficiency, it is necessary to increase the line width and layer thickness of the transparent conductive layer and decrease the aperture ratio. However, an increase in the line width and a decrease in the aperture ratio of the transparent conductive layer causes a reduction in visibility, and an increase in the film thickness of the transparent conductive layer makes it difficult to stack with other layers. For this reason, the technique of Patent Document 1 also has a drawback that it is impossible to achieve both excellent visibility and heat generation efficiency.

JP 2014-218103 A

  The inventor conducted various studies to verify the performance of the organic glass laminate, and in the conventional organic glass laminate in which the organic glass substrate, the adhesive layer, the heating wire layer, and the hard coat layer were sequentially laminated, When the heating wire layer is heated by the above, it has been found that the adhesive layer is likely to be whitened and the appearance properties are easily impaired. Such whitening of the adhesive layer reduces the field of view, so that when used as a vehicle window or the like, sufficient safety cannot be ensured.

  Therefore, an object of the present invention is an organic glass laminate having a laminated structure in which an organic glass substrate, an adhesive layer, a heating wire layer, and a hard coat layer are sequentially laminated, and has excellent wear resistance and weather resistance. On the other hand, it is an object of the present invention to provide an organic glass laminate in which whitening of the adhesive layer due to heat generation of the heating wire layer is suppressed and sufficient visibility can be secured.

  The present inventor made extensive studies to solve the above problems, and found that an organic glass substrate, a first adhesive layer, a partially provided heating wire layer, and a hard coat layer were sequentially laminated. In the above, the hard coat layer is formed of a cured product of a resin composition containing a curable resin, and the glass transition point of the adhesive layer is set to 80 to 250 ° C., thereby providing excellent wear resistance and weather resistance. It was found that whitening of the adhesive layer due to heat generation of the heating wire layer can be effectively suppressed, and sufficient visibility can be secured. Furthermore, by using a metal foil as the heating wire layer, the resistance during energization can be greatly reduced, so even if the heating wire layer width is set to 10 μm or less and the aperture ratio is set to 80% or more, it is sufficient. It has also been found that excellent heat generation efficiency can be obtained. The present invention has been completed by further studies based on these findings.

That is, this invention provides the invention of the aspect hung up below.
Item 1. An organic glass substrate, a first adhesive layer, a partially provided heating wire layer, and a hard coat layer are laminated in this order,
The hard coat layer is formed of a cured product of a resin composition containing a curable resin, and the glass transition point of the first adhesive layer is 80 to 250 ° C.
The organic glass laminated body characterized by the above-mentioned.
Item 2. Item 2. The organic glass laminate according to Item 1, wherein the heating wire layer is formed of a metal foil.
Item 3. The organic glass laminated body of claim | item 1 or 2 whose line | wire width of the said heating wire layer is 3-100 micrometers.
Item 4. Item 4. The organic glass laminate according to any one of Items 1 to 3, wherein an aperture ratio of the heating wire layer is 70% or more.
Item 5. Item 5. The organic glass laminate according to any one of Items 1 to 4, wherein the curable resin used for forming the hard coat layer is an ionizing radiation curable resin.
Item 6. Item 6. The organic glass laminate according to any one of Items 1 to 5, which has a primer layer between the heating wire layer and the hard coat layer.
Item 7. Item 7. The organic glass laminate according to any one of Items 1 to 6, comprising a resin film layer between the heating wire layer and the hard coat layer.
Item 8. Item 8. The organic glass laminate according to any one of Items 1 to 7, which has a second adhesive layer between the heating wire layer and the hard coat layer.
Item 9. The organic glass laminated body in any one of claim | item 1 -8 which has the colored layer formed partially between the said organic glass base | substrate and a hard-coat layer.
Item 10. The sheet for organic glass lamination used in order to manufacture the organic glass laminated body in any one of claim | item 1 -9,
At least a first adhesive layer, a partially provided heating wire layer, and a hard coat layer are laminated on the base film,
The hard coat layer is formed of a cured product of a resin composition containing a curable resin, and the glass transition point of the first adhesive layer is 80 to 250 ° C.
Sheet for organic glass lamination.
Item 11. The base film is a resin film layer;
On one surface of the base film, at least the heating wire layer and the first adhesive layer are laminated in this order from the base film side, and at least the hard coat layer is laminated on the other surface,
Item 11. The organic glass laminating sheet according to Item 10, which is used by laminating the organic glass laminating sheet itself on the organic glass substrate.
Item 12. The base film is a resin film layer;
At least the base film, the first adhesive layer, the heating wire layer, and the hard coat layer are laminated in this order,
Item 11. The organic glass laminating sheet according to Item 10, which is used by laminating the organic glass laminating sheet itself on the organic glass substrate.
Item 13. The base film is a release film layer that can be released from the hard coat layer,
On the release film layer, at least the hard coat layer, the heating wire layer, and the first adhesive layer are laminated in this order,
Item 11. The organic glass lamination sheet according to Item 10, which is used for transferring the first adhesive layer, the heating wire layer, the front and the hard coat layer onto an organic glass substrate.
Item 14. Item 15. An organic glass laminate comprising a lamination step of laminating at least a first adhesive layer, a heating wire layer, and a hard coat layer on an organic glass substrate using the organic glass lamination sheet according to any one of Items 10 to 13. Body manufacturing method.
Item 15. Item 15. The method for producing an organic glass laminate according to Item 14, wherein an organic glass resin is injected into the organic glass lamination sheet according to any one of Items 10 to 13 in the lamination step.
Item 16. Item 15. The method for producing an organic glass laminate according to Item 14, wherein in the lamination step, the organic glass laminate sheet according to any one of Items 10 to 13 is pressure-bonded to a preformed organic glass substrate.

  In the organic glass laminate of the present invention, the first adhesive layer interposed between the organic glass substrate and the heating wire layer satisfies the predetermined glass transition point, thereby whitening the first adhesive layer due to heat generation of the heating wire layer. It can be effectively suppressed and sufficient visibility can be secured.

  In addition, in the organic glass laminate of the present invention, when a metal foil is used as the heating wire layer, a high heating efficiency is recognized even in a heating wire layer having a line width of 10 μm or less and an aperture ratio of 80% or more. It is also possible to achieve both visibility and high heat generation efficiency.

  Furthermore, since the surface of the organic glass laminate of the present invention is covered with a hard coat layer containing an ultraviolet absorber, it can also have excellent weather resistance and abrasion resistance.

It is a figure which shows the cross-section of the organic glass laminated body of this invention. In the organic glass laminated body of this invention, it is the schematic which shows the arrangement | positioning relationship between the heating wire layer 3 and the 1st contact bonding layer 2. FIG. It is a figure which shows the cross-section of the organic glass laminated body of this invention. It is a figure which shows the cross-section of the organic glass laminated body of this invention. It is a figure which shows the cross-section of the organic glass laminated body of this invention. It is a figure which shows the cross-section of the organic glass laminated body of this invention. It is a figure which shows the cross-section of the organic glass laminated body of this invention. It is a figure which shows an example of the cross-section of the organic glass lamination sheet used for the transfer method. It is a figure which shows an example of the cross-section of the organic glass lamination sheet used for the transfer method. It is a figure which shows an example of the cross-sectional structure of the sheet | seat for organic glass lamination used for the laminating method.

1. Organic glass laminate The organic glass laminate of the present invention comprises an organic glass substrate, a first adhesive layer, a partially provided heating wire layer, and a hard coat layer, which are laminated in this order. It is formed by the hardened | cured material of the resin composition containing curable resin and a ultraviolet absorber, and the glass transition point of the said 1st contact bonding layer is 80-250 degreeC, It is characterized by the above-mentioned. Hereinafter, the organic glass laminate of the present invention will be described in detail.

As shown in FIG. 1, the organic glass laminate of the present invention comprises at least an organic glass substrate 1, a first adhesive layer 2, a partially provided heating wire layer 3, and a hard coat layer 4 in this order. It has a laminated structure.

  In the organic glass laminate of the present invention, as shown in FIG. 2, the heating wire layer 3 has a first adhesion except for the surface on the hard coat layer 4 side (that is, the side surface and the surface on the first adhesive layer 2 side). It is provided in a state embedded in the layer 2.

  Moreover, the primer layer 5 may be provided in the organic glass laminated body of this invention between the said heating wire layer 3 and the hard-coat layer 4, as needed. The primer layer 5 plays a role of improving the adhesiveness of the hard coat layer 4. In the organic glass laminated body of this invention, the schematic diagram of the cross section of the aspect in which the primer layer 5 is provided is shown in FIG.

  Moreover, the resin film layer 6 may be provided in the organic glass laminated body of this invention between the said heating wire layer 3 and the said hard-coat layer 4 as needed. The resin film layer 6 serves as a base material that supports the heating wire layer 3. When the primer layer 5 is provided, the resin film layer 6 may be provided between the heating wire layer 3 and the primer layer 5. In the organic glass laminated body of this invention, the schematic diagram of the cross section of the aspect in which the primer layer 5 and the resin film layer 6 are provided is shown in FIG.

  Furthermore, in order to improve the adhesiveness between the heating wire layer 3 and the hard coat layer 4, the organic glass laminate of the present invention is provided with a second adhesive layer 7 between these layers as necessary. It may be done. When the primer layer 5 is provided, the second adhesive layer 7 may be provided between the heating wire layer 3 and the primer layer 5. In the organic glass laminated body of this invention, the schematic diagram of the cross section of the aspect in which the primer layer 5 and the 2nd contact bonding layer 7 are provided is shown in FIG.

  Moreover, in the organic glass laminated body of the present invention, concealment of the adhesive application part when fixing the organic glass laminated body of the present invention at any location between the organic glass substrate 1 and the hard coat layer 4, information display, A partially formed colored layer 8 may be provided for the purpose of imparting design properties or the like. The colored layer 8 is, for example, between the organic glass substrate 1 and the first adhesive layer 2, between the first adhesive layer 2 and the heating wire layer 3, and / or between the heating wire layer 3 and the hard coat layer 4. Is provided. Moreover, when providing the primer layer 5 in the organic glass laminated body of this invention, the colored layer 8 is the 1st contact bonding layer 2 and the heating wire layer 3 between the organic glass base | substrate 1 and the 1st contact bonding layer 2, for example. , Between the heating wire layer 3 and the primer layer 5 and / or between the primer layer 5 and the hard coat layer 4. Moreover, when providing the primer layer 5 and the resin film layer 6 in the organic glass laminated body of this invention, the colored layer 8 is the 1st contact bonding layer 2 between the organic glass base | substrate 1 and the 1st contact bonding layer 2, for example. Between the heating wire layer 3, between the heating wire layer 3 and the resin film layer 6, between the resin film layer 6 and the primer layer 5, and / or between the primer layer 5 and the hard coat layer 4. It is done. Moreover, when providing the primer layer 5 and the 2nd contact bonding layer 7 in the organic glass laminated body of this invention, the colored layer 8 is a 1st contact bonding layer between the organic glass base | substrate 1 and the 1st contact bonding layer 2, for example. 2 between the heating wire layer 3, between the heating wire layer 3 and the second adhesive layer 7, between the resin film layer 6 and the primer layer 5, and / or between the primer layer 5 and the hard coat layer 4. Is provided. In the organic glass laminate of the present invention, FIG. 6 shows a schematic diagram of a cross-section of an embodiment in which the primer layer 5, the resin film layer 6, and the colored layer 8 are provided. The primer layer 5, the second adhesive layer 7, and the colored layer FIG. 7 shows a schematic diagram of a cross section of the embodiment in which 8 is provided.

The following composition of the layers constituting the organic glass laminate, the composition of each layer constituting the organic glass laminate of the present invention, physical properties, thicknesses, etc. of explaining.

[Organic glass substrate 1]
In the organic glass laminate of the present invention, the type of organic glass used for the organic glass substrate 1 is not particularly limited as long as it is transparent and strong and can be used as a substitute for the current glass. Examples include polycarbonate, polymethyl methacrylate, polyacrylate, polyethylene terephthalate, polyethylene naphthalate, polyolefin, ABS, and the like. Among these organic glasses, polycarbonate is excellent in impact resistance, transparency and heat resistance, and is preferably used.

When using polycarbonate as the organic glass substrate 1, for the melt volume rate (MVR) is not particularly limited, 6~25cm ^3/10 min about, and preferably about 6~12cm ^3/10 min. Since the lower the melt volume rate, the better the impact resistance, a polycarbonate resin having an appropriate melt volume rate may be selected according to the use of the organic glass laminate of the present invention. The melt volume rate is a value measured under conditions of a temperature of 300 ° C. and a load of 1.2 kgf in accordance with JIS K 7210-1999.

  In the organic glass laminate of the present invention, the organic glass substrate 1 may be formed by laminating a plurality of organic glasses of the same or different types. As one aspect of the organic glass substrate 1 in which a plurality of organic glasses are laminated, there is a structure in which a polycarbonate substrate and a substrate made of another organic glass are laminated. For example, an organic glass substrate 1 in which a polycarbonate substrate and a polymethylmethacrylate substrate are sequentially stacked from the hard coat layer 4 side, or a polymethyl methacrylate substrate, a polycarbonate substrate, and a polymethyl methacrylate substrate are sequentially stacked from the hard coat layer 4 side. By using the organic glass substrate 1, it is possible to have both the impact resistance of the polycarbonate substrate and the high hardness of the polymethylmethacrylate substrate.

  Further, when the organic glass substrate 1 has a plurality of laminated structures, two or more polycarbonate substrates having different compositions such as physical properties, chemical compositions, and additive amounts may be laminated. For example, by using the organic glass substrate 1 in which a hard polycarbonate substrate having a high molecular weight and a soft polycarbonate substrate having a low molecular weight are laminated in order from the hard coat layer 4 side, in addition to the impact resistance by the polycarbonate substrate, weather resistance can be improved. It becomes possible to have higher together. Alternatively, in the case of the organic glass substrate 1 having a three-layer structure composed of the first polycarbonate substrate, the second polycarbonate substrate, and the third polycarbonate substrate from the hard coat layer 4 side, the first polycarbonate substrate and the second polycarbonate substrate By setting the amount of the ultraviolet absorber contained in the polycarbonate substrate higher than the amount of the ultraviolet absorber contained in the second polycarbonate substrate, the function as the core material of the second substrate is enhanced, It is possible to ensure excellent impact resistance and to have higher weather resistance.

  Thus, the organic glass base | substrate 1 with which the same or different kind of organic glass is laminated | stacked can be prepared by coextrusion, for example.

  The shape of the organic glass substrate 1 is not particularly limited and may be appropriately set according to the use of the organic glass laminate to be produced. However, the thickness is usually 0.5 to 50 mm, preferably 0.8 to 20 mm. More preferably, 1.0-5 mm is mentioned.

[First adhesive layer 2]
The first adhesive layer 2 is a layer provided to adhere the heating wire layer 3 to the organic glass substrate 1. Moreover, in the organic glass laminated body of this invention, the 1st contact bonding layer 2 whose glass transition point is 80-250 degreeC is employ | adopted, and the heating wire layer 3 is embed | buried under the said 1st contact bonding layer 2, and the heating wire layer 3 It is possible to suppress whitening of the first adhesive layer 2 due to heat generation.

  Although the 1st contact bonding layer 2 should just be a contact bonding layer comprised by adhesive resins, such as a heat sensitive adhesive and a pressurization adhesive, Preferably the heat seal layer which expresses the welding effect | action by heating is mentioned. Specific examples of the adhesive resin constituting the first adhesive layer 2 include acrylic resin, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer resin, styrene-acryl copolymer resin, polyester resin, polyamide. Examples thereof include resins and polyolefin resins. Among the adhesive resins, an acrylic resin is preferably used from the viewpoint of more effectively suppressing the whitening of the first adhesive layer 2 due to heat generated by the heating wire layer 3. These adhesive resins may be used individually by 1 type, and may be used in combination of 2 or more type.

  About the glass transition point of the 1st contact bonding layer 2, the range of 80-250 degreeC should just be satisfied. When the glass transition point of the first adhesive layer 2 is less than 80 ° C., whitening occurs due to heat generation of the heating wire layer 3, and the visual field tends to be impaired, and when the glass transition point of the first adhesive layer 2 exceeds 250 ° C. Adhesion with the organic glass substrate 1 becomes insufficient. From the viewpoint of more effectively suppressing whitening due to heat generation of the heating wire layer 3, the glass transition point of the first adhesive layer 2 is preferably 80 to 160 ° C, more preferably 100 to 120 ° C.

  In the present specification, the glass transition point of the first adhesive layer 2 is a value measured by a dynamic viscoelasticity measurement method (DMA; Dynamic Mechanical Analysis). Specifically, with respect to the adhesive layer 2, the storage elastic modulus is within a range of 0 to 200 ° C. with an observation length of 15 mm, a temperature increase rate of 5 ° C./min, and a measurement frequency of 1 Hz with a dynamic viscoelasticity measuring device. The loss elastic modulus is measured, the peak top of tan δ, which is a value obtained by dividing the loss elastic modulus by the storage elastic modulus, is determined, and the temperature of the peak top is specified as the glass transition point.

  In order to satisfy the glass transition point with respect to the first adhesive layer 2, the type or combination of adhesive resins used for forming the first adhesive layer 2 may be appropriately set.

  The thickness of the first adhesive layer 2 is usually 0.1 to 25 μm, preferably 1 to 20 μm, more preferably 2 to 15 μm.

  The first adhesive layer 2 is formed by applying an adhesive resin on a predetermined layer to be laminated by a method such as die coating, gravure coating, bar coating, roll coating, reverse roll coating, comma coating, etc. Done. The formation of the first adhesive layer 2 can also be performed by a method in which a film formed of an adhesive resin is thermally fused on a predetermined layer.

[Heating wire layer 3]
The heating wire layer 3 is a layer that is partially provided between the first adhesive layer 2 and the hard coat layer 4. The heating wire layer 3 generates heat when energized, and plays a role in preventing and removing condensation and fogging in the organic glass laminate. Fulfill.

  The heating wire layer 3 should just be connected to the electrode for supplying an electric current to the heating wire layer 3 in the organic glass laminated body of this invention. The power source is usually arranged at the end of the organic glass laminate of the present invention, and the constituent material is not particularly limited as long as it exhibits conductivity. For example, the power source is the same constituent material as the heating wire layer 3. Can be formed.

  Moreover, the heating wire layer 3 is partially provided to such an extent that the visual field of the organic glass laminate is not hindered, and a portion other than the surface on the hard coat layer 4 side is embedded in the first adhesive layer 2. Thus, when the heating wire layer 3 is provided in a state of being embedded in the first adhesive layer 2, in the conventional organic glass laminate, whitening easily occurs due to heat generation of the heating wire layer 3, In the present invention, as described above, since the first adhesive layer 2 has a predetermined glass transition point, the whitening can be suppressed.

  The heating wire layer 3 is not particularly limited as long as it is conductive and can generate heat when energized, and may be formed of a metal foil, and may include metal fine particles and a binder resin. You may form using the metal paste containing. The constituent material of the heating wire layer 3 is preferably a metal foil from the viewpoint of increasing the heat generation efficiency with low resistance. By using the heating wire layer 3 made of metal foil, the wire width of the heating wire layer 3 can be reduced and the aperture ratio can be increased, so that both excellent visibility and high heat generation efficiency can be achieved. .

  When the heating wire layer 3 is formed of a metal foil, the constituent metal of the metal foil is not particularly limited as long as it is conductive and can generate heat when energized. For example, copper, gold, silver , Iron, nickel, chromium, aluminum, and alloys thereof (for example, stainless steel). Among these, copper is preferably used from the viewpoint of further increasing the heat generation efficiency.

  When the heating wire layer 3 is formed of a metal foil, the metal foil may be subjected to blackening treatment as necessary in order to prevent light reflection. The blackening treatment may be performed by roughening and / or blackening the surface of the metal foil, by a plating method such as black nickel plating, tin-nickel alloy plating, black chrome plating, or a chemical conversion treatment method for blackening with a chemical. It can be carried out.

  The heating wire layer 3 made of a metal foil can be formed by, for example, a photolithography method. A technique for processing a metal foil into a predetermined shape by a photolithography method is described in, for example, International Publication No. 05/060326, and the heating wire layer 3 made of the metal foil can be formed according to a known method.

  As a method of forming the heating wire layer 3 made of metal foil by photolithography, specifically, after laminating the metal foil on a predetermined layer, a resist layer having a predetermined shape is formed on the surface of the metal foil. It is possible to form the heating wire layer 3 made of a metal foil of a predetermined shape by removing the resist layer after etching the portion of the metal foil that is not covered with the resist layer by etching. it can.

  Masking with a resist layer is performed by, for example, applying a photosensitive resist on a metal foil, drying the photosensitive resist, and then closely exposing the photosensitive resist with a predetermined shape of the original, developing with water, hardening, etc. And baking. As the photosensitive resist, it is possible to use a resist such as casein, polyvinyl alcohol, gelatin or the like to which dichromate is added. The photosensitive resist can be applied onto the metal foil by a method such as curtain coating or pouring on the surface of the metal foil. Moreover, you may use the dry film resist which does not apply | coat a photosensitive resist, In this case, workability | operativity improves. The baking temperature condition may be set as appropriate according to the type of resist to be used. In case of a casein resist, it is usually performed at 100 to 300 ° C.

  Etching the metal foil can be performed using an etchant that can etch the metal foil. Examples of the etching solution include an aqueous solution containing ferric chloride, cupric chloride, and the like. Moreover, you may wash with water after an etching as needed.

  The removal of the resist layer after the etching can be performed by using an alkali solution.

  In addition, when the heating wire layer 3 is formed using a metal paste containing metal fine particles and a binder resin, the material of the metal fine particles to be used is particularly limited as long as it is conductive and can generate heat when energized. Although it does not restrict | limit, For example, metals, such as copper, silver, gold | metal | money, nickel, chromium, aluminum, tungsten, iron, and these alloys (stainless steel); Metal compounds, such as a tin oxide and a zinc oxide, are mentioned. These metal fine particles may be used alone or in combination of two or more.

  Further, the type of binder resin used in the metal paste is not particularly limited. For example, urethane resin, (meth) acrylic resin, (meth) acrylic / urethane copolymer resin, vinyl chloride / vinyl acetate copolymer Examples thereof include coalescence, polyester resin, butyral resin, chlorinated polypropylene, and chlorinated polyethylene. These binder resins may be used individually by 1 type, and may be used in combination of 2 or more type.

  In the metal paste, the ratio between the metal fine particles and the binder resin may be appropriately set in consideration of the heat generation efficiency to be provided. For example, the binder resin is 0.1 to 80 mass per 100 mass parts of the metal fine particles. Parts, preferably 5 to 25 parts by mass.

  When the heating wire layer 3 is formed of a conductive composition containing metal fine particles and a binder resin, the conductive composition may be formed on a predetermined layer by a technique such as screen printing.

  The shape of the heating wire layer 3 is not particularly limited as long as the organic glass laminate can be heated by heat generation and the visibility can be secured, and examples thereof include a line segment group shape and a mesh shape. In the case of a mesh shape, the shape of the unit cell is not particularly limited, but is, for example, a triangle such as a regular triangle or an unequal triangle; a square such as a square, a rectangular trapezoid, or a rhombus; a polygon such as a hexagon or an octagon; A circle, an ellipse, etc. are mentioned. In the case of a mesh shape, the unit cell may be a random polygon or circular pattern.

  The aperture ratio of the heating wire layer 3 may be appropriately set according to the heat generation efficiency of the heating wire layer 3, the visual field to be secured, etc., for example, 70% or more, preferably 75 to 99%, more preferably 80. -95%. Here, the aperture ratio of the heating wire layer 3 is the ratio of the area of the region where the heating wire layer 3 is not provided to the total area of the organic glass laminate.

  In addition, the line width of the heating wire layer 3 may be appropriately set according to the constituent material, the heat generation efficiency to be provided, and the like, and examples thereof include 3 to 100 μm. More specifically, in the case of the heating wire layer 3 made of a metal foil, the wire width of the heating wire layer 3 is preferably 3 to 50 μm, more preferably 5 to 15 μm. In the case of the heating wire layer 3 made of metal foil, even with such a thin line width, high heat generation efficiency is possible, and a further excellent visibility can be secured. Moreover, if the heating wire layer 3 is formed of a metal paste, the line width of the heating wire layer 3 is preferably 30 to 100 μm, more preferably 30 to 50 μm.

[Hard coat layer 4]
The hard coat layer 4 is a surface layer provided on the heating wire layer 3 and is formed by a cured product of a resin composition containing a curable resin. The hard coat layer 4 makes it possible to provide the organic glass laminate with excellent weather resistance and wear resistance.

(Curable resin)
The curable resin used for forming the hard coat layer 4 is not particularly limited as long as it is a resin that is cured by crosslinking, but, for example, an ionizing radiation curable resin, a thermosetting resin, a room temperature curable resin, One-component reaction curable resin, two-component reaction curable resin, and the like can be given. Among these curable resins, ionizing radiation curable resins are preferably used from the viewpoint of more effectively providing excellent weather resistance and abrasion resistance.

  Specific examples of the ionizing radiation curable resin include those obtained by appropriately mixing prepolymers, oligomers, and / or monomers having functional groups (polymerizable unsaturated bonds and / or epoxy groups) in the molecule. Here, the ionizing radiation refers to an electromagnetic wave or a charged particle beam having an energy quantum capable of polymerizing or cross-linking molecules. Usually, ultraviolet rays or electron beams are used, but ultraviolet rays contained in the hard coat layer 4 are used. In order to prevent the hard coat layer 4 from being insufficiently cured by the action of the absorbent, an electron beam is preferable.

  The type of ionizing radiation curable resin used for the hard coat layer 4 is not particularly limited, but as a suitable example of the ionizing radiation curable resin, two or more polymerizable unsaturated bonds (bifunctional) are present in the molecule. And the like). In the present invention, (meth) acrylate means acrylate or methacrylate, and other similar notations have the same meaning.

  The number of functional groups of the polyfunctional (meth) acrylate is not particularly limited as long as the glass transition point described above can be satisfied, but is, for example, 2 to 50, preferably 2 to 8, and more preferably 2 to 6. Is mentioned.

  Specific examples of the polyfunctional (meth) acrylate include urethane (meth) acrylate, caprolactone-modified urethane (meth) acrylate, (meth) acrylate having an alicyclic or aliphatic heterocyclic ring, polycarbonate (meth) acrylate, and penta Examples include erythritol (meth) acrylate, epoxy (meth) acrylate, polyester (meth) acrylate, polyether (meth) acrylate, polybutadiene (meth) acrylate, silicone (meth) acrylate, and aminoplast resin (meth) acrylate.

  Here, the urethane (meth) acrylate can be obtained, for example, by esterifying a polyurethane oligomer obtained by the reaction of a polyol such as polyether polyol, polyester polyol, or polycarbonate polyol and polyisocyanate with (meth) acrylic acid. it can. Caprolactone-modified urethane (meth) acrylate can be obtained, for example, by reaction of caprolactone-modified polyol, polyisocyanate, and hydroxy (meth) acrylate. The polycarbonate (meth) acrylate can be obtained, for example, by esterifying part or all of the polycarbonate polyol hydroxyl group with (meth) acrylic acid. Pentaerythritol-based (meth) acrylate can be obtained, for example, by esterifying some or all of the hydroxyl groups of pentaerythritol or a polymer thereof with (meth) acrylic acid. Epoxy (meth) acrylate can be obtained, for example, by reacting (meth) acrylic acid with an oxirane ring of a relatively low molecular weight bisphenol type epoxy resin or novolak type epoxy resin and esterifying it. Also, a carboxyl-modified epoxy (meth) acrylate obtained by partially modifying this epoxy (meth) acrylate with a dibasic carboxylic acid anhydride can be used. Polyester (meth) acrylate is obtained by esterifying the hydroxyl group of a polyester oligomer having hydroxyl groups at both ends obtained by condensation of a polyvalent carboxylic acid and a polyhydric alcohol with (meth) acrylic acid, for example, or It can be obtained by esterifying the terminal hydroxyl group of an oligomer obtained by adding an alkylene oxide with (meth) acrylic acid. The polyether (meth) acrylate can be obtained by esterifying the hydroxyl group of the polyether polyol with (meth) acrylic acid. Polybutadiene (meth) acrylate can be obtained by adding (meth) acrylate acid to the side chain of the polybutadiene oligomer. Silicone (meth) acrylate can be obtained by modifying silicone having a polysiloxane bond in the main chain with (meth) acrylic acid. The aminoplast resin (meth) acrylate can be obtained by modifying an aminoplast resin having many reactive groups in a small molecule with (meth) acrylic acid.

  These polyfunctional (meth) acrylates may be used individually by 1 type, and may be used in combination of 2 or more type.

  Among these polyfunctional (meth) acrylates, in order to more effectively provide the organic glass laminate with excellent weather resistance and abrasion resistance, preferably trifunctional or higher (meth) acrylate and bifunctional The combination with (meth) acrylate is mentioned.

  When using a combination of trifunctional (meth) acrylates and bifunctional (meth) acrylates, these ratios may be appropriately set according to the type of each (meth) acrylate to be combined, The bifunctional (meth) acrylate is 1 to 150 parts by mass, preferably 5 to 120 parts by mass, and more preferably 10 to 100 parts by mass with respect to 100 parts by mass of the trifunctional or higher functional (meth) acrylate.

  Hereinafter, the combination of (i) trifunctional or higher (meth) acrylate and bifunctional (meth) acrylate will be described.

<(I) Trifunctional or higher functional (meth) acrylate>
Examples of the tri- or more functional (meth) acrylate include urethane (meth) acrylate, caprolactone-modified urethane (meth) acrylate, polycarbonate (meth) acrylate, pentaerythritol (meth) acrylate, epoxy (meth) acrylate, and polyester (meth) ) Acrylate, polyether (meth) acrylate, polybutadiene (meth) acrylate, silicone (meth) acrylate, aminoplast resin (meth) acrylate, and the like. These trifunctional or higher functional (meth) acrylates may be used alone or in combination of two or more.

  The number of functional groups of the (meth) acrylate having 3 or more functional groups is not particularly limited as long as it is 3 or more, but satisfies the glass transition point described above, and more effectively has excellent weather resistance, abrasion resistance, and bending. From the viewpoint of providing processing followability, for example, 3 to 50, preferably 3 to 8, and more preferably 4 to 6 are mentioned.

  The average molecular weight of the tri- or higher functional (meth) acrylate varies depending on the type and cannot be uniformly defined. For example, 200 to 100,000, preferably 500 to 50,000, and more preferably 1000 to 30,000 can be mentioned. . Here, the average molecular weight of tri- or higher functional (meth) acrylate is a weight average molecular weight measured by GPC analysis and converted to standard polystyrene.

  Among these tri- or higher functional (meth) acrylates, urethane is preferable from the viewpoint of satisfying the glass transition point described above and further effectively providing the organic glass laminate with excellent weather resistance and wear resistance. (Meth) acrylate, more preferably, urethane (meth) acrylate having a skeleton such as polyether, polyester, and polycarbonate.

  These trifunctional or higher functional (meth) acrylates may be used alone or in combination of two or more.

<(Ii) Bifunctional (meth) acrylate>
About the kind of bifunctional (meth) acrylate, what is necessary is just to select a bifunctional thing suitably in the (meth) acrylate mentioned above.

  A suitable example of the bifunctional (meth) acrylate is caprolactone-modified urethane acrylate from the viewpoint of providing further excellent weather resistance and abrasion resistance.

  Bifunctional caprolactone-modified urethane (meth) acrylate (hereinafter sometimes referred to as “(ii-1) bifunctional (meth) acrylate”) is composed of caprolactone-modified diol, polyisocyanate, and hydroxy (meth) acrylate. It can obtain by reaction of.

  The caprolactone-modified diol preferably has two hydroxyl groups and has a weight average molecular weight of preferably 500 to 3000, more preferably 750 to 2000. In addition, diols other than caprolactone-modified diol, for example, diols such as ethylene glycol, diethylene glycol, 1,4-butanediol, 1,6-hexanediol, and the like are mixed and used as a constituent raw material in an arbitrary ratio. You can also

  As the polyisocyanate, a diisocyanate having two isocyanate groups is preferable, and isophorone diisocyanate, hexamethylene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, trimethylhexamethylene diisocyanate, and the like are preferable from the viewpoint of suppressing yellowing. Moreover, as a hydroxy (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, caprolactone modified | denatured 2-hydroxyethyl (meth) acrylate, etc. are mentioned preferably.

  The bifunctional caprolactone-modified urethane (meth) acrylate can be synthesized by a reaction of these polycaprolactone-based diols, polyisocyanates, and hydroxy (meth) acrylates. As a synthesis method, a polycaprolactone-modified diol and polyisocyanate are reacted to form a polyurethane prepolymer containing -NCO groups (isocyanate groups) at both ends, and then reacted with hydroxy (meth) acrylate. Is preferred. The reaction conditions and the like may be in accordance with conventional methods.

  As an average molecular weight of bifunctional caprolactone modified urethane (meth) acrylate, 1000-12000, for example, Preferably 1000-10000 are mentioned. Here, the average molecular weight of the bifunctional (meth) acrylate is a weight average molecular weight measured by GPC analysis and converted to standard polystyrene.

  The ratio of the trifunctional or higher functional (meth) acrylate to the bifunctional (meth) acrylate may be appropriately set according to the type of each (meth) acrylate to be combined. A bifunctional (meth) acrylate is 1-150 mass parts with respect to 100 mass parts, Preferably 5-120 mass parts, More preferably, 10-100 mass parts is mentioned.

(Other additives)
In order to further improve the weather resistance, it is desirable that the hard coat layer 4 contains an ultraviolet absorber in addition to the curable resin.

  Although it does not restrict | limit especially about the kind of ultraviolet absorber used for the hard-coat layer 4, For example, a hydroxyphenyl triazine type compound, a benzotriazole type compound, a benzophenone type compound, an oxalic acid anilide type compound, a salicylic acid phenyl ester type compound, Examples include acrylonitrile compounds. Among these, hydroxyphenyl triazine compounds and benzotriazole compounds are preferable, and hydroxyphenyl triazine compounds are more preferable. These ultraviolet absorbers may be used alone or in combination of two or more.

  When the hard coat layer 4 contains an ultraviolet absorber, the ratio of the curable resin and the ultraviolet absorber is not particularly limited. For example, from the viewpoint of effectively protecting the curable resin of the hard coat layer 4, The amount may be 0.1 to 10 parts by weight, preferably 0.2 to 10 parts by weight, more preferably 0.5 to 5 parts by weight, and particularly preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of the total amount of the curable resin. 7-2 mass parts is mentioned.

  Furthermore, the hard coat layer 4 may contain a light stabilizer as necessary in order to further improve the weather resistance. The light stabilizer is preferably a hindered amine light stabilizer (HALS). Moreover, as a suitable example of a light stabilizer, the reactive hindered amine light stabilizer which has reactivity with curable resin, ie, has a reactive group in a molecule | numerator, is mentioned. By using such a reactive hindered amine light stabilizer, hard coat properties (such as scratch resistance) can be improved without causing cross-linking inhibition, and bleed out can be reduced. Stickiness of the surface of the hard coat layer 4 and adhesion failure with the primer layer 5 provided as necessary can be effectively suppressed. Specific examples of the reactive group include functional groups having an ethylenic double bond such as a (meth) acryloyl group, a vinyl group, and an allyl group. As such a light stabilizer, for example, 1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate (manufactured by BASF, trade name “Sanol LS-3410”) or (Hitachi Chemical Co., Ltd.) And 2,2,6,6-tetramethyl-4-piperidinyl methacrylate (manufactured by Hitachi Chemical Co., Ltd., trade name “FA-712HM”) and the like. . These light stabilizers may be used individually by 1 type, and may be used in combination of 2 or more type.

  Although it does not restrict | limit especially about content of the light stabilizer in the hard-coat layer 4, For example, 0.5-10 mass parts with respect to 100 mass parts of total amounts of ionizing radiation-curable resin, Preferably 1-8 mass parts, More preferably, 2-6 mass parts is mentioned.

  Moreover, you may contain various additives other than the above in the hard-coat layer 4 in the range which does not impair the effect of this invention as needed. Examples of such additives include wear resistance improvers, polymerization inhibitors, crosslinking agents, infrared absorbers, antistatic agents, adhesion improvers, leveling agents, thixotropic agents, coupling agents, and lubricants. , Antifouling agents, plasticizers, antifoaming agents, fillers, colorants, fillers and the like. For example, the hardness and heat resistance of the hard coat layer 4 can be improved by adding filler particles (silica particles) having higher hardness and heat resistance than the resin component.

(Thickness of hard coat layer 4)
The thickness of the hard coat layer 4 is not particularly limited, but is usually 1 to 10 μm, preferably 1.5 to 6 μm, from the viewpoint of providing further excellent weather resistance, wear resistance, and bending followability. Is mentioned.

(Method for forming hard coat layer 4)
The hard coat layer 4 may be formed by a method corresponding to the type of curable resin to be used. For example, if a thermosetting resin, a room temperature curable resin, a one-component reactive curable resin, or a two-component reactive curable resin is used, these resins, an ultraviolet absorber, and various additions as necessary The resin composition for the hard coat layer 4 mixed with the agent is applied to a predetermined arrangement site by a method such as gravure coating, bar coating, roll coating, reverse roll coating, comma coating, and heated as necessary. Therefore, the resin composition may be cured.

  The resin composition for the hard coat layer 4 may be one obtained by dissolving or dispersing a curable resin and an additive added as necessary in a solvent. The solvent used in the resin composition for the hard coat layer 4 may be any solvent as long as it exhibits solubility or compatibility with the curable resin and additives added as necessary. What is necessary is just to select suitably according to the application | coating method of the resin composition for layer 4, the drying method at the time of formation of the hard-coat layer 4, etc., but from a viewpoint of the solubility or compatibility with a curable resin, a drying property, etc. Solvents are preferred. Examples of the organic solvent include, but are not limited to, alcohols such as methanol, ethanol, and isopropanol; esters such as ethyl acetate, butyl acetate, and propylene glycol monomethyl ether acetate; acetone, methyl ethyl ketone, cyclopentanone, cyclohexanone, and isobutyl ketone. And ketones such as methyl isobutyl ketone. These organic solvents may be used individually by 1 type, and may be used in combination of 2 or more type.

  If an ionizing radiation curable resin is used, a resin composition for a hard coat layer in which an ionizing radiation curable resin, an ultraviolet absorber, and various additives as necessary are mixed with a gravure coat The coating composition may be applied to a predetermined arrangement site by a method such as bar coating, roll coating, reverse roll coating, or comma coating, and the resin composition may be irradiated with an ionizing radiation such as an electron beam or an ultraviolet ray to be cured.

  When an electron beam is used for curing the ionizing radiation curable resin, the acceleration voltage can be appropriately selected according to the type of ionizing radiation curable resin to be used, the thickness of the hard coat layer 4, etc. About 300 kV. The irradiation dose is preferably such that the crosslinking density of the resin layer is saturated, and is usually selected in the range of 5 to 300 kGy (0.5 to 30 Mrad), preferably 10 to 100 kGy (1 to 10 Mrad). Furthermore, there is no restriction | limiting in particular as an electron beam source, For example, various electron beam accelerators, such as a cock loft Walton type, a van de Graft type, a resonance transformer type, an insulated core transformer type, or a linear type, a dynamitron type, a high frequency type etc. Can be used.

  By adding various additives to the hard coat layer 4 thus formed, a hard coat function, an antifogging coat function, an antiglare coat function, an antireflection coating function, an ultraviolet shielding coating function, an infrared shielding coating function, etc. You may perform the process which provides this function.

[Primer layer 5]
The primer layer 5 is a layer provided as necessary between the heating wire layer 3 and the hard coat layer 4, and plays a role of improving the adhesion of the hard coat layer 4. When providing the resin film layer 6 described later, the primer layer 5 is preferably provided between the resin film layer 6 and the hard coat layer 4. Moreover, when providing the 2nd contact bonding layer 7 mentioned later, it is preferable to provide the primer layer 5 between the 2nd contact bonding layer 7 and the hard-coat layer 4. FIG.

  The primer layer 5 is formed using a binder resin. The binder resin is not particularly limited. For example, urethane resin, (meth) acrylic resin, (meth) acrylic / urethane copolymer resin, vinyl chloride / vinyl acetate copolymer, polyester resin, butyral resin, chlorinated polypropylene And chlorinated polyethylene. These binder resins may be used individually by 1 type, and may be used in combination of 2 or more type. Among these binder resins, a urethane resin is preferable, and a polyurethane containing an acrylic component is more preferable.

  As the urethane resin, polyurethane having a polyol (polyhydric alcohol) as a main ingredient and an isocyanate as a crosslinking agent (curing agent) can be used. The polyol may be any compound having two or more hydroxyl groups in the molecule, and specific examples include polyester polyol, polyethylene glycol, polypropylene glycol, acrylic polyol, polyether polyol and the like. Specific examples of the isocyanate include polyvalent isocyanate having two or more isocyanate groups in the molecule; aromatic isocyanate such as 4,4-diphenylmethane diisocyanate; hexamethylene diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, Examples include aliphatic (or alicyclic) isocyanates such as hydrogenated diphenylmethane diisocyanate.

  Among the urethane resins, acrylic polyol or polyester polyol is preferably used as the polyol from the viewpoints of improving adhesion to the hard coat layer 4, reducing interaction after laminating the hard coat layer 4, and improving moldability. And a combination of hexamethylene diisocyanate and 4,4-diphenylmethane diisocyanate as a cross-linking agent; and a combination of acrylic polyol and hexamethylene diisocyanate is more preferable.

  Although it does not restrict | limit especially about the thickness of the primer layer 5, For example, 0.5-20 micrometers, Preferably 1-10 micrometers is mentioned.

  Primer layer 5 includes gravure coat, gravure reverse coat, gravure offset coat, spinner coat, roll coat, reverse roll coat, kiss coat, wheeler coat, dip coat, silk screen solid coat, wire bar coat, flow coat, comma coat, coat It is formed by applying a resin composition for forming a primer layer containing a binder resin on a predetermined layer by a usual coating method such as flow coating, brush coating, spray coating, or transfer coating method. Here, the transfer coating method is a method in which a primer layer coating is formed on a thin sheet (film substrate), and then the surface of a predetermined layer is coated.

[Resin film layer 6]
The resin film layer 6 is a layer provided as necessary between the heating wire layer 3 and the hard coat layer 4 for supporting the heating wire layer 3 or the like.

  In the organic glass laminate of the present invention, the resin film layer 6 can use a transparent resin used for a general transparent substrate film. Examples of the resin constituting the resin film layer 6 include cycloolefin resins obtained from cycloolefins such as norbornene, dicyclopentadiene, and tetracyclododecene, silicone resins, polycarbonate resins, epoxy resins, polymethyl methacrylate, and polymethacrylate. Preferred examples include resins such as acrylic resins such as butyl acid, phenol resins, polyimide resins, benzoxazine resins, oxetane resins, polyester resins such as polyethylene terephthalate resins and polybutylene terephthalate resins. Among these, from the viewpoint of providing more excellent transparency, a polycarbonate resin, an acrylic resin, a polyester resin, and a polyester resin are more preferable.

  Moreover, in addition to the transparent resin mentioned above, the resin film layer 6 may contain various additives as needed. Examples of such additives include plasticizers, stabilizers, matting agents, ultraviolet absorbers, infrared absorbers, and the like.

  Furthermore, the resin film layer 6 may be subjected to a surface treatment such as corona discharge, glow discharge, UV irradiation or the like, if necessary.

  The thickness of the resin film layer 6 is usually 50 to 300 μm, preferably 75 to 200 μm, and more preferably 75 to 150 μm.

[Second adhesive layer 7]
The second adhesive layer 7 is a layer provided as necessary between these layers in order to improve the adhesion between the heating wire layer 3 and the hard coat layer 4.

  The second adhesive layer 7 may be an adhesive layer made of an adhesive resin such as a heat-sensitive adhesive or a pressure adhesive, and preferably includes a heat seal layer that exhibits a welding action by heating. The type of adhesive resin constituting the second adhesive layer 7 is the same as that exemplified for the first adhesive layer 2.

  Further, the glass transition point of the second adhesive layer 7 is not particularly limited, but it is desirable to have the glass transition point indicated by the first adhesive layer 2.

  The thickness of the second adhesive layer 7 is usually 1 to 20 μm, preferably 1.5 to 10 μm, and more preferably 2 to 5 μm.

  The second adhesive layer 7 is formed by applying an adhesive resin onto a predetermined layer to be laminated by a method such as gravure coating, bar coating, roll coating, reverse roll coating, comma coating, or the like. . The second adhesive layer 7 can also be formed by heat-sealing a film formed of an adhesive resin on a predetermined layer to be laminated.

[Colored layer 8]
The colored layer 8 is provided between the organic glass substrate 1 and the hard coat layer 4 for the purpose of concealing the adhesive application portion when fixing the organic glass laminate of the present invention, providing information display, and imparting design properties. It is a layer provided as needed.

  For example, when the organic glass laminate of the present invention is used as a window frame member of an automobile, the fixing method of the organic glass laminate can be selected by fixing with an adhesive, fitting, screwing, etc. For simplicity, fixing with an adhesive is preferred. At that time, if the entire surface of the organic glass laminate is transparent, the adhesive application part is likely to be visually recognized, and the appearance may be impaired. By providing the colored layer 8 for the purpose of concealment in a region corresponding to a region that is not desired to be visually recognized from the outside, the region can be concealed. In addition, when it is desired to give information such as a manufacturer, regulation, or a design such as a pattern, the information display or design can be given by the colored layer 8.

  In the organic glass laminate of the present invention, as the colored layer 8, two or more layers having different color tones may be provided at the same or different arrangement locations. For example, a black colored layer 8 and a white colored layer 8 may be provided in this order from the organic glass substrate 1 side, and a white colored layer 8 and black may be provided from the organic glass substrate 1 side. The colored layer 8 exhibiting may be provided in this order.

  Further, the shape of the colored layer 8 is not particularly limited as long as it is partially provided when viewed from the direction perpendicular to the surface direction of the organic glass laminate of the present invention. What is necessary is just to set suitably according to. For example, if the colored layer 8 is provided for the purpose of concealing the adhesive application portion when fixing the organic glass laminate of the present invention, it is a frame shape that conceals the outer edge of the organic glass laminate of the present invention. It is preferable. Thus, when it is the frame shape which conceals the outer edge part of the organic glass laminated body of this invention, what is necessary is just to set the width | variety of the colored layer 8 to about 10-200 mm, for example. Furthermore, when providing the frame-shaped colored layer 8 which conceals the outer edge part of the organic glass laminated body of this invention, the said frame-shaped colored layer 8 and the area | region where the said frame-shaped colored layer 8 is not provided In the vicinity of the boundary, a colored layer 8 having a gradation pattern may be further provided. Such a gradation pattern is, for example, a pattern such as a circle (dot), a rectangle (line), a square, or a triangle, and the pattern becomes smaller as the pattern moves away from the frame-shaped colored layer 8. It may be set so that the color of is lighter.

  Moreover, if the colored layer 8 is provided for the purpose of providing information display or design, the shape of the colored layer 8 is a character, symbol, number, pattern, etc. including a company logo, trademark, and regulatory instructions. Good.

  The color tone exhibited by the colored layer 8 is not particularly limited, and any one of colored transparent, colored translucent, colored opaque, and the like may be adopted depending on the purpose. For example, when the colored layer 8 is used for the purpose of partially concealing the lower part, it is preferably colored and opaque.

More specifically, if the colored layer 8 is provided for the purpose of concealment, the higher the OD (Optical Density; optical density) value of the colored layer 5 is preferable, from the viewpoint of imparting excellent concealability. Specifically, it is 3 or more, preferably 4 or more, more preferably 5 or more. Here, the OD value of the colored layer 8 is a value obtained by the following method.
(Measurement method of OD value of colored layer 8)
In the organic glass laminate of the present invention, the OD value (OD _low value) of the part where the colored layer 8 is not provided and the OD value (OD _high value) of the part where the colored layer 8 is provided are measured. The value obtained according to the calculation formula (OD _high value−OD _low value) is the OD value of the colored layer 8. Here, the OD _low value and the OD _high value are values measured at a central wavelength of 555 nm using a transmission densitometer.

  Moreover, the OD value of the colored layer 8 described above can be satisfied by appropriately setting the type and content of the pigment or dye used for forming the colored layer 8.

  The colored layer 8 is formed of a colorant and a binder resin.

  As the coloring agent, either a pigment or a dye may be used, or both of them may be used. From the viewpoint of durability and weather resistance, a pigment is preferably used. Further, the color exhibited by the colorant may be appropriately set according to the purpose of the colored layer 8, but a black pigment is preferable when it is provided for the purpose of concealment. The type of black pigment is not particularly limited, and examples thereof include carbon black, titanium black, perylene black, and azomethine azo black.

  Further, the binder resin is not particularly limited, but acrylic resin, vinyl chloride resin, vinyl acetate resin, polyester resin, polyamide resin, polyolefin resin, urethane resin, and copolymer resin of these resins (for example, urethane- Acrylic copolymer resin, etc.). These binder resins may be either a one-component curable type or a two-component curable type. Moreover, these binder resins may be used alone or in combination of two or more.

  In addition, for the colored layer 8, as necessary, a polymerization inhibitor, a crosslinking agent, an infrared absorber, an antistatic agent, an adhesion improver, a leveling agent, a thixotropic agent, a coupling agent, a plasticizer, an antifoaming agent Additives such as agents, fillers, colorants, fillers may be included.

  The thickness of the colored layer 8 may be appropriately set depending on the purpose, the OD value to be set, the type and content of the colorant to be used, and is usually 0.1 to 20 μm, preferably 1 to 15 μm. More preferably, 3-10 micrometers is mentioned.

  The colored layer 8 is formed by using an ink composition for the colored layer 8 containing a colorant, a binder resin, and an additive that is added if necessary, gravure coating, screen printing, offset printing, flexographic printing, comma coating, It is carried out by coating on a predetermined layer by a method such as ink jet or dispenser.

  The ink composition for forming the colored layer 8 may be one obtained by dissolving or dispersing a colorant, a binder resin, and an additive added as necessary in a solvent. The solvent used in the ink composition for the colored layer 8 may be any solvent as long as it exhibits solubility or compatibility with the colorant, binder resin, and additive added as necessary. What is necessary is just to select suitably according to the coating method of the ink composition for layer 8, the drying method at the time of colored layer 8 formation, etc., but from a viewpoint of solubility or compatibility with a colorant and a binder resin, drying property, etc. Organic solvents are preferred. Examples of the organic solvent include, but are not limited to, alcohols such as methanol, ethanol, and isopropanol; esters such as ethyl acetate, butyl acetate, and propylene glycol monomethyl ether acetate; acetone, methyl ethyl ketone, cyclopentanone, cyclohexanone, and isobutyl ketone. And ketones such as methyl isobutyl ketone. These organic solvents may be used individually by 1 type, and may be used in combination of 2 or more type.

Use of Organic Glass Laminate The organic glass laminate of the present invention can prevent or eliminate the formation of condensation and fogging while ensuring sufficient visibility due to the heat generated by the heating wire layer 3, and has excellent weather resistance and resistance. Since it has abrasion, it is suitably used as an exterior member.

  Specific uses of the organic glass laminate of the present invention include automobiles, railways, etc. (various windows, sunroofs, roof panels, window reflectors, turn signal lamp lenses, side mirrors, headlamp covers, etc.); balcony partitions Examples include building members such as boards, roof members such as terraces and carports, entrance doors, windows of buildings; wall materials such as soundproof walls and windbreak walls; and lenses used for traffic lights. Among these, since the exterior member for vehicles, especially the window for vehicles, is highly required to secure visibility, prevent and remove condensation and fogging, weather resistance, and wear resistance, the organic glass of the present invention. It is particularly suitable as a laminate.

  What is necessary is just to attach the organic glass laminated body of this invention to a predetermined | prescribed site | part according to the use in the state which connected the power supply which supplies electric power to the electrode to which the heating wire layer 3 is connected.

Production method of organic glass laminate The production method of the organic glass laminate of the present invention is not particularly limited as long as the layer structure described above can be formed. For example, each layer other than the organic glass substrate 1 is laminated in advance. A method for laminating an organic glass lamination sheet and laminating at least the first adhesive layer 2, the heating wire layer 3, and the hard coat layer 4 on the organic glass substrate 1 using the organic glass lamination sheet (hereinafter, And a method of sequentially laminating each layer on the glass substrate 1 (hereinafter also referred to as “second method”). The first method is suitable as a method for producing an organic glass laminate of the present invention because an organic glass laminate can be produced efficiently. Hereinafter, the first method and the second method will be described.

[First method]
In the first method, using a sheet for laminating an organic glass in which at least a first adhesive layer 2, a heating wire layer 3, and a hard coat layer 4 are laminated on a substrate film, The process of laminating | stacking 1 adhesive layer 2, the heating wire layer 3, and the hard-coat layer 4 in this order is performed.

  As a method of laminating each layer on the organic glass substrate 1 using the organic glass laminating sheet, each layer provided on the organic glass laminating sheet is transferred to the organic glass substrate 1 so that each layer is formed on the organic glass substrate 1. (Hereinafter also referred to as “transfer method”); and a method of laminating each layer on the organic glass substrate 1 by laminating the organic glass laminating sheet itself on the organic glass (hereinafter referred to as “lamination method”). , Sometimes referred to as “laminate method”).

  The organic glass laminating sheet only needs to have at least the adhesive layer 2, the heating wire layer 3, and the hard coat layer 4 laminated on the base film, and the layer structure depends on the transfer method or the laminating method. Is set as appropriate.

  Specifically, for the organic glass lamination sheet used in the transfer method (hereinafter sometimes referred to as “transfer sheet”), the release film layer 9 is used as a base film, and the release is performed. It is sufficient that at least the hard coat layer 4, the heating wire layer 3, and the first adhesive layer 2 are laminated on the film layer 9 in this order. Moreover, when providing the primer layer 5, the resin film layer 6, the 2nd contact bonding layer 7, and / or the colored layer 8 in the organic glass laminated body to manufacture, these layers are predetermined arrangement | positioning on the transfer sheet. It suffices if they are laminated. As an example of a suitable layer structure of the transfer sheet, a release film layer 9, a hard coat layer 4, a primer layer 5, a heating wire layer 3, and a first adhesive layer 2 are laminated in this order. Examples include a layer structure. The laminated structure of the transfer sheet is shown in FIG. Further, as another example of a suitable layer structure of the transfer sheet, a release film layer 9, a hard coat layer 4, a primer layer 5, a second adhesive layer 7, a heating wire layer 3, A layer structure in which the first adhesive layer 2 is laminated in this order is exemplified. The laminated structure of the transfer sheet is shown in FIG.

  In the transfer sheet, the resin constituting the release film layer 9 is not particularly limited as long as it has releasability from the hard coat layer 4. For example, polyolefin resins such as polyethylene and polypropylene; polyvinyl chloride; , Vinylidene chloride, polyvinyl alcohol, vinyl resins such as ethylene / vinyl acetate copolymer, ethylene / vinyl alcohol copolymer; polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate; poly (meth) acrylic Acrylic resins such as methyl acrylate and poly (meth) acrylate; styrene resins such as polystyrene, acrylonitrile / butadiene / styrene copolymers, cellulose triacetate, cellophane, polycarbonate, polyurethane, etc. It is utilized by Tomah resin. Among these resins, polyester resins are preferable, and polyethylene terephthalate is more preferable because of good moldability and release characteristics.

  The release film layer 9 may be a single layer formed using a single resin, or may be a multilayer formed using the same or different resins. Further, the release film layer 9 may be subjected to any coating or treatment in order to adjust the peel strength.

  Furthermore, the release film layer 9 may be provided with a release layer on the surface in contact with the hard coat layer 4 as necessary in order to adjust the peel strength with respect to the hard coat layer 4. As an example of a suitable layer structure of the transfer sheet provided with the release layer, the release film layer 9, the release layer, the hard coat layer 4, the primer layer 5, the heating wire layer 3, and the first A layer structure in which the adhesive layer 2 is laminated in this order is exemplified.

  The release layer is formed of a thermoplastic resin that can adjust the peel strength with respect to the hard coat layer 4. Specific examples of the thermoplastic resin forming the release layer include silicone resin, fluorine resin, acrylic-melamine resin, polyester resin, polyolefin resin, polystyrene resin, polyurethane resin, vinyl chloride-vinyl acetate resin, and the like. It is done. The thickness of the release layer is usually 0.1 to 10 μm, preferably 0.2 to 8 μm, and more preferably 0.3 to 5 μm.

  The release layer is formed by applying a thermoplastic resin onto the release film layer 9 by a method such as gravure coating, bar coating, roll coating, reverse roll coating, or comma coating.

  Although it does not restrict | limit especially as thickness of the film layer 9 for mold release, Usually, 20-200 micrometers, Preferably it is 30-100 micrometers, More preferably, 40-80 micrometers is mentioned.

  Moreover, about the organic glass lamination sheet | seat (henceforth a "1st lamination sheet") used by the laminating method, the resin film layer 6 is used as a base film, and the resin film layer 6 is used. It is sufficient that at least the first adhesive layer 2, the heating wire layer 3, and the hard coat layer 4 are laminated. Specifically, at least the heating wire layer 3 and the first adhesive layer 2 are laminated in this order on one surface of the resin film layer 6 from the resin film layer 6 side, and on the other surface of the resin film layer 6, It is sufficient that at least the hard coat layer 4 is laminated in this order. Moreover, when providing the primer layer 5, the 2nd contact bonding layer 7, and / or the colored layer 8 in the organic glass laminated body to manufacture, these layers should just be laminated | stacked by the predetermined arrangement | positioning on the sheet | seat for lamination. . As an example of a suitable layer structure of the laminating sheet, a layer in which the first adhesive layer 2, the heating wire layer 3, the resin film layer 6, the primer layer 5, and the hard coat layer 4 are laminated in this order. Structure is mentioned. The laminated structure of the laminating sheet is shown in FIG.

  As another aspect of the laminating sheet, the resin film layer 6 is used as a base film, and at least the resin film layer 6, the first adhesive layer 2, the heating wire layer 3, and the hard coat layer 4 are A stacked structure in which the layers are stacked in order is mentioned. Moreover, when providing the primer layer 5, the 2nd contact bonding layer 7, and / or the colored layer 8 in the organic glass laminated body to manufacture, these layers should just be laminated | stacked by the predetermined arrangement | positioning on the sheet | seat for lamination.

  As a method of laminating the organic glass laminating sheet on the organic glass substrate 1, specifically, a method of pressure bonding the first organic glass laminating sheet to the preformed organic glass substrate 1 (hereinafter referred to as “crimping method”) And a method of laminating an organic glass resin by integrating it with an organic glass laminating sheet (hereinafter, also referred to as “injection molding integrated method”). Hereinafter, the method for producing the organic glass laminate of the present invention will be described by being divided into a pressure bonding method and an injection molding integrated method.

  Specifically, as the pressure bonding method, the organic glass substrate 1 is formed by extrusion molding or the like, and immediately after or after cooling, the sheet for laminating organic glass is pressure bonded to the organic glass substrate 1 using a roll or the like and laminated. The method of doing is mentioned. When the first organic glass laminating sheet is pressure-bonded to the organic glass substrate 1, the organic glass laminating sheet may be heated. The heating of the organic glass laminating sheet can be performed by preheating the organic glass laminating sheet before pressure bonding, heating simultaneously with pressure bonding with a hot-pressure roll, or the like. Moreover, you may preheat the organic glass base | substrate 1 before crimping | bonding the 1st organic glass lamination sheet.

  In addition, when a transfer sheet is used, the release film layer 9 may be peeled off after the transfer sheet is pressure-bonded to the organic glass substrate 1.

  Further, after the transfer sheet is pressure-bonded to the organic glass substrate 1, bending may be performed as necessary. Moreover, when the organic glass lamination sheet is a transfer sheet, the bending process may be performed either before or after the release of the base film 1 for release. The bending method is not particularly limited and includes, for example, cold bending, hot bending, and the like, but hot bending is preferable from the viewpoint of workability.

  Specific examples of the injection molding integrated method include a method of injecting and molding an organic glass resin to the first adhesive layer 2 of the organic glass laminating sheet.

More specifically, as an embodiment of a method for integrating the organic glass laminating sheet and the organic glass substrate 1 by the injection molding integration method, there is a method of performing the following Steps I to II.
Step I: Insert the first organic glass laminating sheet into the injection mold so that the surface of the first adhesive layer 2 is disposed on the organic glass resin side, close the injection mold, and the fluidized organic glass resin. Is injected into an injection mold to integrate the organic glass substrate 1 and the organic glass lamination sheet.
Step II: When a transfer sheet is used, the release film layer 9 is peeled off and removed.

  In order to facilitate integration of the organic glass laminating sheet with the injected resin in the step I, the organic glass laminating sheet is preliminarily prepared as necessary before inserting the organic glass laminating sheet into the injection mold. You may heat. Moreover, the injected organic glass resin and the organic glass laminating sheet can be integrated by the residual heat of the injected organic glass without preheating the organic glass laminating sheet. In the first step I, the organic glass lamination sheet inserted into the injection mold may be attached to the injection mold by vacuum suction or the like before injecting the organic glass resin.

  In the step II, the release film layer 9 may be peeled off simultaneously with the separation of the injection mold or after the separation of the injection mold. Alternatively, the release film layer 9 may not be peeled off until the organic glass laminate is used, and the state where the release film layer 9 is attached may be maintained.

Moreover, the method of implementing the following 1st process-5th process as another aspect of the method of integrating the organic glass lamination sheet and the organic glass base | substrate 1 by the injection molding integrated method is mentioned.
1st process: It supplies and fixes so that the surface by the side of the 1st resin layer 2 of the sheet | seat for organic glass lamination may face the cavity side between a pair of male and female molds in the mold open state. Further, the surface of the organic glass lamination sheet on which the organic glass resin is injected is heated and softened, and vacuum suction is performed from the mold side facing the surface opposite to the organic glass resin lamination sheet. Is closely adhered along the shape of the movable mold to preform the first organic glass laminating sheet.
Second step: After both molds are clamped, the organic glass substrate 1 and the organic glass are laminated by injecting, filling, and solidifying a fluidized organic glass resin in a cavity formed by both molds. The sheets are laminated and integrated.
Third step: The movable mold is separated from the fixed mold, and the organic glass laminate in which the organic glass substrate 1 and the organic glass lamination sheet are integrated is taken out.
Fourth step: An excess portion of the organic glass laminate is trimmed and adjusted to a desired shape.
Fifth step: When a transfer sheet is used, the release film layer 9 is peeled and removed. In addition, this 5th process may be performed simultaneously with separation of the metal mold | die in the said 3rd process, and may be performed between the said 3rd process and the said 4th process.

  Further, after predetermined layers are laminated on the organic glass substrate 1 by an injection molding integrated method, bending may be performed as necessary.

[Second method]
In the second method, at least the first adhesive layer 2, the heating wire layer 3, and the hard coat layer 4 are sequentially laminated on the organic glass substrate 1 in this order. In the second method, the heating wire layer 3 may be laminated by previously forming the heating wire layer 3 on the resin film layer 6 and laminating the heating wire layer 3 on the first adhesive layer 2. Moreover, when providing the primer layer 5, the resin film layer 6, the 2nd contact bonding layer 7, and / or the colored layer 8 in an organic glass laminated body, what is necessary is just to laminate | stack so that these layers may become predetermined arrangement | positioning. The method for forming each layer is as described above.

  In the second method, bending may be performed as necessary during the formation of each layer or after the formation of all the layers.

2. Sheet for organic glass laminate The present invention provides an organic glass laminate sheet for producing an organic glass laminate by the first method. About the layer structure of the said sheet | seat for organic glass lamination | stacking, it sets suitably according to a use mode (a distinction of the transfer method or the lamination method). The layer structure of the organic glass lamination sheet for each use mode is as described above.

  Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples. However, the present invention is not limited to the examples.

1. Manufacture of organic glass laminates
Example 1
Manufacture of organic glass laminating sheets (laminate sheets) Resin film layer (100 μm thick ) made of biaxially stretched polyethylene terephthalate and dry laminate adhesive (two-component curable urethane adhesive; main ingredient Takelac A made of polyester urethane polyol) -310 (manufactured by Takeda Pharmaceutical Company Limited) and xylene diisocyanate curing agent Takenate A-10 (manufactured by Takeda Pharmaceutical Company Limited)) were bonded to each other by dry lamination. Next, a heating wire layer made of a copper foil having a mesh shape (opening ratio: 91%) was formed by a photolithography method under the following conditions.

  First, a casein photosensitive resist was applied on a copper foil by a dipping method. Then, using a negative pattern plate having a mesh portion having an opening of a square shape, a line width of 22 μm, a line interval (pitch) of 300 μm, a bias angle of 49 degrees, and a frame portion having a width of 15 mm surrounding the mesh portion, Was exposed to ultraviolet rays for close contact exposure. Subsequently, after carrying out water development and film hardening, it was further heated and baked. Then, using the ferric chloride aqueous solution as an etching solution, spraying was performed by a spray method to etch the unmasked region of the copper foil to form an opening. Then, the heating wire layer which consists of a copper foil of mesh shape (94% of open area ratio) was formed on the resin film layer by performing water washing, peeling a resist, wash | cleaning, and drying with warm air.

  Next, the surface of the resin film layer on which the heating wire layer is laminated is subjected to corona discharge treatment, and then the primer layer forming resin composition shown below is applied by the gravure reverse method. Then, a primer layer having a thickness of 3 μm is formed, and the resin composition for forming a hard coat layer shown below is applied on the primer layer so that the thickness after curing is 3 μm, and then irradiated with an electron beam. A hard coat layer was laminated on the primer layer by curing at 10 Mrad.

<Resin composition for forming primer layer>
・ Polycarbonate urethane acrylic copolymer ^{* 1} : 100 parts by mass ・ Hydroxyphenyltriazine UV absorber ^{* 2} : 17 parts ・ Hydroxyphenyltriazine UV absorber ^{* 3} : 13 parts ・ Hindered amine light stabilizer ^{* 4} : 8 parts by mass · Antiblocking agent ^{* 5} : 9 parts by mass · Curing agent (hexane methylene diisocyanate): 25 parts by mass * 1: Polyurethane-acrylic acrylic copolymer has a urethane component content of 30% by mass and a mass average A molecular weight of 50000 was used.
* 2: Tinuvin 400 (trade name), 2- [4-[(2-hydroxy-3-dodecyloxypropyl) oxy] -2-hydroxyphenyl] -4,6-bis (2,4-dimethylphenyl)- 1,3,5-triazine, manufactured by BASF Japan Ltd. * 3: Tinuvin 479 (trade name), 2- (2-hydroxy-4- [1-octyloxycarbonylethoxy] phenyl) -4,6-bis (4 -Phenylphenyl) -1,3,5-triazine, manufactured by BASF Japan Ltd. * 4: Tinuvin 123 (trade name), bis (1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate ), Manufactured by BASF Japan Ltd. * 5: silica particles, average particle size: 3 μm.

<Resin composition for forming hard coat layer>
-Hexafunctional urethane acrylate (molecular weight of about 1,000): 60 parts by mass-Bifunctional caprolactone-modified urethane acrylate (molecular weight of about several thousand): 40 parts by mass-Hydroxyphenyltriazine-based UV absorber: 0.7 parts by mass (BASF Japan) "Tinuvin479" manufactured by Co., Ltd.)
-Light stabilizer having a reactive functional group (1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate, "Sanol LS-3410" manufactured by Nippon Emulsifier Co., Ltd.): 4.2 parts by mass Reactive silicone compound (polyether-modified silicone oil): 0.3 part by mass / Scratch resistant filler (silica particles, average particle size: 2 μm): 2 parts by mass

  Next, on the surface of the heating wire layer side, a heat-fusible acrylic resin (glass transition point 105 ° C., molecular weight 100,000) was applied by a die coating method to a thickness of 10 μm to form a first adhesive layer. . Thus, an organic glass laminating sheet (laminating sheet) in which the first adhesive layer, the heating wire layer, the resin film layer, the primer layer, and the hard coat layer were sequentially laminated was obtained.

Production of organic glass laminate Using the organic glass laminate sheet (laminate sheet) obtained above, an injection molding integration method was performed to integrate the polycarbonate substrate. Specifically, an organic glass laminating sheet is placed between a pair of male and female molds (movable mold and fixed mold) in an open state, and a resin film is placed in the cavity so that the first adhesive layer is in contact with the resin. Supplied and fixed. Thereafter, the resin film layer of the organic glass laminating sheet is heated to 100 ° C. to be softened, and the softened organic glass laminating sheet is moved by vacuum suction from the mold side facing the hard coat layer side. A sheet for organic glass lamination was preformed by adhering along the shape of the mold. Next, after both molds are clamped, the polycarbonate substrate and the organic glass lamination sheet formed by injecting, filling and solidifying the polycarbonate resin in a fluid state into the cavity formed by both molds Were laminated and integrated. Thereafter, the movable mold was separated from the fixed mold to obtain an organic glass laminate in which a polycarbonate substrate, a first adhesive layer, a heating wire layer, a resin film layer, a primer layer, and a hard coat layer were laminated in this order.

Example 2
Production of Organic Glass Laminating Sheet (Transfer Sheet) The resin composition for forming the hard coat layer used in Example 1 was formed into a release film layer (thickness 75 μm) made of polyethylene terephthalate, and the thickness after curing was The hard coat layer was laminated on the film layer for mold release by coating so that it might be set to 3 micrometers, and hardening by electron beam irradiation 10Mrad. Next, after the corona discharge treatment was applied to the hard coat layer, the primer layer-forming resin composition used in Example 1 was applied by a gravure reverse method to form a primer layer having a thickness of 3 μm. Further, a heat-fusible acrylic resin (glass transition point 105 ° C., molecular weight 100,000) was applied on the primer layer by a gravure reverse method to form a second adhesive layer having a thickness of 4 μm. Furthermore, a copper foil having a thickness of 10 μm was adhered on the second adhesive layer by a laminating method, and a heating wire layer made of a mesh-shaped copper foil was formed by a photolithography method under the same conditions as in Example 1.

  Next, on the surface of the heating wire layer side, a heat-fusible acrylic resin (glass transition point 105 ° C., molecular weight 100,000) was applied by a die coating method to a thickness of 10 μm to form a first adhesive layer. . Thus, an organic glass laminating sheet (transfer sheet) in which the first adhesive layer, the heating wire layer, the second adhesive layer, the primer layer, the hard coat layer, and the release film layer were sequentially laminated was obtained.

Production of Organic Glass Laminate After using the organic glass laminating sheet (transfer sheet) obtained above under the same conditions as in Example 1, the release film layer was peeled off and polycarbonate An organic glass laminate was obtained in which a base, a first adhesive layer, a heating wire layer, a second adhesive layer, a primer layer, and a hard coat layer were sequentially laminated.

Example 3
Production of Organic Glass Laminating Sheet (Transfer Sheet) The resin composition for forming the hard coat layer used in Example 1 was formed into a release film layer (thickness 75 μm) made of polyethylene terephthalate, and the thickness after curing was The hard coat layer was laminated on the film layer for mold release by coating so that it might be set to 3 micrometers, and hardening by electron beam irradiation 10Mrad. Next, after the corona discharge treatment was applied to the hard coat layer, the primer layer-forming resin composition used in Example 1 was applied by a gravure reverse method to form a primer layer having a thickness of 3 μm. Furthermore, a copper paste (trade name “CP4121”, manufactured by Asahi Glass Co., Ltd., containing 100 parts by mass of Cu and 22 parts by mass of binder resin) is printed on the primer layer by mesh printing and baked at 120 ° C. for 30 minutes. Then, a mesh-shaped heating wire layer (line width 50 μm, space 450 μm, thickness 10 μm, aperture ratio 81%) was formed.

  Next, on the surface of the heating wire layer side, a heat-fusible acrylic resin (glass transition point 105 ° C., molecular weight 100,000) was applied by a die coating method to a thickness of 10 μm to form a first adhesive layer. . Thus, an organic glass laminating sheet (transfer sheet) in which the first adhesive layer, the heating wire layer, the primer layer, the hard coat layer, and the release film layer were sequentially laminated was obtained.

Production of Organic Glass Laminate After using the organic glass laminating sheet (transfer sheet) obtained above under the same conditions as in Example 1, the release film layer was peeled off and polycarbonate An organic glass laminate in which a base, a first adhesive layer, a heating wire layer, a primer layer, and a hard coat layer were laminated in order was obtained.

Example 4
Production of Organic Glass Laminating Sheet (Transfer Sheet) The resin composition for forming the hard coat layer used in Example 1 was formed into a release film layer (thickness 75 μm) made of polyethylene terephthalate, and the thickness after curing was The hard coat layer was laminated on the film layer for mold release by coating so that it might be set to 3 micrometers, and hardening by electron beam irradiation 10Mrad. Next, after the corona discharge treatment was applied to the hard coat layer, the primer layer-forming resin composition used in Example 1 was applied by a gravure reverse method to form a primer layer having a thickness of 3 μm. Furthermore, on the primer layer, an ink composition for a colored layer (black pigment: 210 parts by mass of carbon black (average particle size 24 nm), binder resin: 100 parts by mass of vinyl chloride resin, and 100 parts by mass of acrylic resin) Content) was applied three times by gravure direct method to form a colored layer (thickness 5 μm) having a frame shape (shape having an opening) having a length of 170 mm, a width of 100 mm, and a width of 20 mm. On the colored layer, a heat-sealing resin (acrylic resin) was applied by a gravure reverse method to form a second adhesive layer having a thickness of 4 μm, and further a copper foil (thickness 10 μm) was bonded by dry lamination. . Next, a heating wire layer made of a mesh-shaped copper foil was formed by photolithography under the same conditions as in Example 1. Further, a heat-bonding acrylic resin (glass transition point 105 ° C., molecular weight 100,000) was applied to the surface on the heating wire layer side so as to have a thickness of 10 μm by a die coating method to form a first adhesive layer. . Thus, an organic glass laminating sheet (transfer sheet) in which the first adhesive layer, the heating wire layer, the second adhesive layer, the colored layer, the primer layer, the hard coat layer, and the release film layer are sequentially laminated is obtained. It was.

Production of Organic Glass Laminate After using the organic glass laminating sheet (transfer sheet) obtained above under the same conditions as in Example 1, the release film layer was peeled off and polycarbonate An organic glass laminate was obtained in which a base, a first adhesive layer, a heating wire layer, a colored layer, a primer layer, and a hard coat layer were sequentially laminated.

Example 5
Manufacture of organic glass laminating sheets (laminate sheets) Resin film layer (100 μm thick ) made of biaxially stretched polyethylene terephthalate and dry laminate adhesive (two-component curable urethane adhesive; main ingredient Takelac A made of polyester urethane polyol) -310 (manufactured by Takeda Pharmaceutical Company Limited) and xylene diisocyanate curing agent Takenate A-10 (manufactured by Takeda Pharmaceutical Company Limited)) were bonded to each other by dry lamination. Next, a heating wire layer made of a mesh-shaped copper foil was formed by photolithography under the same conditions as in Example 1. Next, after the corona discharge treatment is performed on the surface opposite to the heating wire layer of the resin film layer on which the heating wire layer is laminated, an ink composition for a colored layer (black pigment: carbon black (average particle size) 24 nm) 210 parts by mass, binder resin: containing 100 parts by mass of vinyl acetate resin and 100 parts by mass of acrylic resin) by gravure direct method three times by overcoating, length 170 mm, width 100 mm, A colored layer (thickness 5 μm) having a frame shape (a shape having an opening) with a width of 20 mm was formed.

  Furthermore, the primer layer-forming resin composition used in Example 1 was applied to the colored layer side surface by a gravure reverse method to form a primer layer having a thickness of 3 μm. Next, the resin composition for forming the hard coat layer used in Example 1 is applied onto the primer layer so that the thickness after curing is 3 μm, and is cured by electron beam irradiation of 10 Mrad. A hard coat layer was formed. Further, a heat-bonding acrylic resin (glass transition point 105 ° C., molecular weight 100,000) was applied to the surface on the heating wire layer side so as to have a thickness of 10 μm by a die coating method to form a first adhesive layer. . Thus, an organic glass laminating sheet (laminating sheet) in which the first adhesive layer, the heating wire layer, the resin film layer, the colored layer, the primer layer, and the hard coat layer were sequentially laminated was obtained.

Production of organic glass laminate Using the organic glass laminate sheet (laminate sheet) obtained above, injection molding was performed under the same conditions as in Example 1, and the polycarbonate substrate, the first adhesive layer, the heating wire layer, An organic glass laminate in which a resin film layer, a colored layer, a primer layer, and a hard coat layer were sequentially laminated was obtained.

Comparative Example 1
Production of Organic Glass Laminating Sheet (Laminated Sheet) A first adhesive made of a heat-fusible acrylic resin having a glass transition temperature of 15 ° C. and a thickness of 30 μm, using a pressure-sensitive adhesive film with a separator instead of a heat-fusible acrylic resin. An organic glass laminating sheet (laminating sheet) in which a first adhesive layer, a heating wire layer, a resin film layer, a primer layer, and a hard coat layer are laminated in order under the same conditions as in Example 1 except that an adhesive layer is formed )

Production of Organic Glass Laminate On one side of a polycarbonate plate having a thickness of 3 mm, the organic glass lamination sheet (laminate sheet) obtained above was placed so that the first adhesive layer was on the polycarbonate plate side. The organic glass laminating sheet and the polycarbonate plate were integrated by heat treatment and pasting at 5 ° C. for 5 minutes. Thus, an organic glass laminate in which a polycarbonate substrate, a first adhesive layer, a heating wire layer, a resin film layer, a primer layer, and a hard coat layer were laminated in order was obtained.

2. Method for evaluating performance of organic glass laminate The obtained organic glass laminate was evaluated for the resistance at the time of energization, heat generation efficiency, wear resistance, weather resistance, and appearance after energization by the following methods.

(Resistance and heat generation efficiency when energized)
A conductive copper foil tape (manufactured by Nisshin EM Co., Ltd.) was bonded to the end of the heating wire layer in the obtained organic glass laminate to form a simple take-out part. A power supply device was connected to the extraction portion, a DC voltage of 2 V was applied, and resistance and heat generation efficiency were calculated. The resistance was calculated from the current value when a DC voltage of 2V was applied. Further, the heat generation efficiency was calculated from the heat generation amount by applying a DC voltage of 2 V according to the following formula.
Heat generation efficiency (W / m ² ) = voltage (2 V) × current value (A) ÷ area of organic glass laminate (m ² )

(Abrasion resistance)
Based on ASTM D1044-08E1, CS-10F was used for the wear wheel, and the Taber abrasion test was performed under the conditions of 50 rpm and 500 g load. About four places of each organic glass laminated body before and after a Taber abrasion test, haze was measured according to the method of JISK7136 using the haze meter (Nippon Denshoku Industries NDH-2000), and the average value was calculated | required. The haze difference (ΔH) before and after the Taber abrasion test was determined by subtracting the haze before the Taber abrasion test from the haze after the Taber abrasion test. Based on the haze difference (ΔH), the wear resistance was evaluated according to the following criteria.
○: Haze difference (ΔH) less than 10% ×: Haze difference (ΔH) 10% or more

(Weatherability)
The obtained organic glass laminate was stored in a constant temperature and humidity chamber (85 ° C., relative humidity 85% RH) for 1000 hours, and then a tape peeling test was performed in accordance with JIS K5400. Sex was evaluated.
(Circle): The surface area peeled by the tape peeling test is less than 10%.
(Triangle | delta): The surface area peeled by the tape peeling test is 10% or more and less than 50%.
X: The surface area peeled by the tape peeling test is 50% or more.

(Appearance after energization)
A conductive copper foil tape (manufactured by Nisshin EM Co., Ltd.) was bonded to the end of the heating wire layer in the obtained organic glass laminate to form a simple take-out part. A power supply device was connected to the extraction portion, and after applying a DC voltage of 2 V for 15 minutes, the haze of each organic glass laminate was measured. In addition, haze was measured in accordance with the method described in JIS K7136 using a haze meter (NDH-2000 manufactured by Nippon Denshoku Industries Co., Ltd.) at four locations of each organic glass laminate, and the average value was calculated.

By subtracting the haze before energization from the haze after energization, the haze difference (ΔH) before and after energization was determined. Based on the haze difference (ΔH), the appearance after energization was evaluated according to the following criteria.
○: ΔH <0.5%
Δ: 0.5% ≦ ΔH <2%
×: 2% ≦ ΔH

3. Performance Evaluation Results of Organic Glass Laminates Table 1 shows the performance evaluation results of each organic glass laminate. From this result, the organic glass laminate (Examples 1 to 5) in which the glass transition point of the first adhesive layer satisfies 180 to 250 ° C. does not show whitening after energization, has a stable appearance, and is visible even after energization. It was in a state that could be sufficiently secured. Moreover, the organic glass laminated body of Examples 1-5 was also equipped with the outstanding abrasion resistance. Furthermore, the organic glass laminates of Examples 1 to 5 have weather resistance that is sufficiently acceptable for exterior applications such as vehicle windows, and particularly excellent weather resistance in the organic glass laminates of Examples 2 to 5. It had sex.

  In addition, in the organic glass laminate, when it has a heating wire layer made of a metal foil, the resistance during energization is lower than when it is formed of a conductive composition containing metal fine particles and a binder resin. Even when the aperture ratio was set to 90% and a sufficient field of view was ensured, sufficient heat generation efficiency could be achieved.

DESCRIPTION OF SYMBOLS 1 Organic glass base | substrate 2 1st contact bonding layer 3 Heating wire layer 4 Hard coat layer 5 Primer layer 6 Resin film layer 7 2nd contact bonding layer 8 Colored layer 9 Film layer for mold release

Claims (16)

An organic glass substrate, a first adhesive layer, a partially provided heating wire layer, and a hard coat layer are laminated in this order,
The hard coat layer is formed with a cured product of a resin composition containing a curable resin, and Ri a glass transition point of 80 to 250 ° C. der of the first adhesive layer,
The adhesive resin constituting the first adhesive layer is made of acrylic resin, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer resin, styrene-acrylic copolymer resin, polyester resin, polyamide resin, and polyolefin resin. Ru least 1 Tanedea selected from the group consisting of,
The organic glass laminated body characterized by the above-mentioned.   The organic glass laminate according to claim 1, wherein the heating wire layer is formed of a metal foil.   The organic glass laminated body of Claim 1 or 2 whose line | wire width of the said heating wire layer is 3-100 micrometers.   The organic glass laminated body in any one of Claims 1-3 whose aperture ratio of the said heating wire layer is 70% or more.   The organic glass laminated body in any one of Claims 1-4 whose curable resin used for formation of the said hard-coat layer is an ionizing radiation curable resin.   The organic glass laminated body in any one of Claims 1-5 which has a primer layer between the said heating wire layer and the said hard-coat layer.   The organic glass laminated body in any one of Claims 1-6 which has a resin film layer between the said heating wire layer and the said hard-coat layer.   The organic glass laminated body in any one of Claims 1-7 which has a 2nd contact bonding layer between the said heating wire layer and the said hard-coat layer.   The organic glass laminated body in any one of Claims 1-8 which has the colored layer formed partially between the said organic glass base | substrate and a hard-coat layer. An organic glass substrate, a first adhesive layer, a partially provided heating wire layer, and a hard coat layer are laminated in this order, and the hard coat layer is formed of a cured product of a resin composition containing a curable resin. And an organic glass laminate sheet used for producing an organic glass laminate in which the glass transition point of the first adhesive layer is 80 to 250 ° C. ,
At least a first adhesive layer, a partially provided heating wire layer, and a hard coat layer are laminated on the base film,
The hard coat layer is formed of a cured product of a resin composition containing a curable resin, and the glass transition point of the first adhesive layer is 80 to 250 ° C.
Sheet for organic glass lamination. The base film is a resin film layer;
On one surface of the base film, at least the heating wire layer and the first adhesive layer are laminated in this order from the base film side, and at least the hard coat layer is laminated on the other surface,
The organic glass laminating sheet according to claim 10, which is used by laminating an organic glass laminating sheet itself on an organic glass substrate. The base film is a resin film layer;
At least the base film, the first adhesive layer, the heating wire layer, and the hard coat layer are laminated in this order,
The organic glass laminating sheet according to claim 10, which is used by laminating an organic glass laminating sheet itself on an organic glass substrate. The base film is a release film layer that can be released from the hard coat layer,
On the release film layer, at least the hard coat layer, the heating wire layer, and the first adhesive layer are laminated in this order,
The sheet for laminating organic glass according to claim 10, which is used for transferring the first adhesive layer, the heating wire layer, the front and the hard coat layer onto an organic glass substrate.   An organic glass comprising a laminating step of laminating at least a first adhesive layer, a heating wire layer, and a hard coat layer on an organic glass substrate using the organic glass laminating sheet according to claim 10. A manufacturing method of a layered product.   The manufacturing method of the organic glass laminated body of Claim 14 which inject | emits organic glass resin with respect to the sheet | seat for organic glass lamination | stacking in any one of Claims 10-13 in the said lamination process. The method for producing an organic glass laminate according to claim 14, wherein in the laminating step, the organic glass laminate sheet according to claim 10 is pressure-bonded to a pre-formed organic glass substrate.