JPWO2013161291A1 - Laminate and its construction method - Google Patents

Abstract

A laminate comprising a transparent resin layer containing polyolefin, an adhesive layer having an adhesive strength within a range of 0.01 N / 25 mm to 10 N / 25 mm, and a base material layer containing polyolefin in this order. And a molded body using the laminate.

Description

  The present invention relates to a laminate suitable for decorating, a molded body using the laminate, and a method for producing the molded body.

In general, decoration of automobiles and motorcycles, interior and exterior of homes, housings for home appliances, building materials, information devices, and the like is performed by printing on the resin surface. In this case, there is a problem that the printed layer on the resin surface is peeled off depending on the state of use.
On the other hand, the decoration method which provides a transparent resin layer in a resin surface layer and provides a printing layer in the back surface part of a transparent resin layer is proposed (for example, patent documents 1, 2).
In the decorating method, conventionally, the same material or a different material as the transparent resin layer is used for the backing film or backing sheet that protects the printing surface of the transparent resin layer. Methods such as laminating, heat laminating and hot melt laminating are used. However, each of them has a problem that a large-scale apparatus is required, workability is poor, a yield is poor, and a processing amount is large at one time.

JP 2007-118597 A JP 2000-141401 A

The present invention provides a laminate capable of neatly forming a printed pattern and color on the surface of the object to be decorated, and a molded body neatly formed of the printed pattern and color on the surface of the object to be decorated. For the purpose.
In order to achieve the above-mentioned object, the present inventor has conducted earnest research and uses a laminate in which two films are bonded together at a room temperature through an adhesive layer having a predetermined adhesive strength. It has been found that by welding with heat during processing, decoration by a laminate (laminated body) can be realized more simply and with a smaller quantity than the conventional method, and the present invention has been completed.

According to this invention, the following laminated bodies, the manufacturing method of a laminated body, a molded object, and the manufacturing method of a molded object are provided.
1. A transparent resin layer containing polyolefin,
A laminate comprising an adhesive layer having an adhesive strength within a range of 0.01 N / 25 mm to 10 N / 25 mm, and a base material layer containing polyolefin in this order.
2. A transparent resin layer containing polyolefin,
Printing layer,
A laminate comprising an adhesive layer having an adhesive strength within a range of 0.01 N / 25 mm to 10 N / 25 mm, and a base material layer containing polyolefin in this order.
3. The laminate according to 1 or 2, wherein the adhesive layer contains a tackifier and at least one selected from the group consisting of a styrene elastomer, ethylene vinyl alcohol, polyethylene, and polyolefin.
4). 4. The laminate according to 3, wherein the adhesive layer contains a styrene elastomer, a polyolefin, and a tackifier.
5. The styrenic elastomer has a general formula
A-B-A, or
AB
(Wherein, A is a styrene polymer block, and B is a butadiene polymer block, an isoprene polymer block, or a polymer block obtained by hydrogenating these). The laminate according to 3 or 4, which is characterized in that it exists.
6). The laminate according to any one of 1 to 5, wherein the transparent resin layer has a haze value of 0.1% to 60%.
7). First, a multilayer film (1) is formed by laminating at least an adhesive layer (1a) having an adhesive strength within a range of 0.01 N / 25 mm to 10 N / 25 mm and a base material layer (1b) containing polyolefin. And a second step of bonding the adhesive layer (1a) of the multilayer film (1) to a transparent resin sheet (2) including a layer containing polyolefin. Method.
8). The method for producing a laminate according to 7, wherein the adhesive layer (1a) and the base material layer (1b) are multilayered by multilayer extrusion molding or lamination.
9. The second step is a step of bonding the adhesive layer (1a) of the multilayer film (1) to the printed surface of the transparent resin sheet (2) on which a pattern and / or color is printed. The manufacturing method of the laminated body of 7 or 8 characterized by the above-mentioned.
10. To the transparent resin sheet (2) including a layer containing polyolefin, an adhesive layer (1a) having an adhesive strength within a range of 0.01 N / 25 mm to 10 N / 25 mm and a base material layer (1 b) containing polyolefin The laminated body formed by bonding the said adhesion layer (1a) of the multilayer film (1) laminated | stacked.
11. A molded body using the laminate according to any one of 1 to 6 and 10.
12 12. The molded body according to 11, further comprising a base resin layer on the base layer side of the laminate.
13. 13. The molded body according to 12, wherein the base resin layer is formed by injection molding.
14. A method for producing a molded body, wherein the laminate (I) according to any one of 1 to 6 and 10 is heated to have a desired shape.
15. A step of inserting the laminate (I) according to any one of 1 to 6 and 10 into a mold, and a resin on the base layer (1a) side of the laminate (I) inserted into the mold A method for producing a molded body comprising an injection step of injecting and providing a base resin layer (II).

According to the present invention, a laminate capable of neatly forming a printed pattern and color on the surface of the object to be decorated, and a molded body neatly formed of the printed pattern and color on the surface of the object to be decorated. Can be provided.
According to the present invention, decoration processing can be performed simply and inexpensively as compared with a conventional laminating method.
Since it is possible to use a laminate in which a multilayer film consisting of an adhesive layer / base material layer is attached to a transparent resin sheet that has undergone printing processing at room temperature, facilities such as thermal lamination, dry lamination, and extrusion lamination are no longer necessary. Limits due to processability and processing amount are reduced.
When the laminate is manufactured, the films can be bonded at room temperature, so that there is little risk of positional displacement, sagging of the printed surface, wrinkles, and the like based on the difference in thermal expansion coefficient between the film materials.
In addition, since the adhesive strength of the adhesive layer of the laminate is moderate, it is possible to reattach when misalignment occurs, yield in the production of the laminate, and further yield in the production of the molded body using the laminate. Can also be expected.
In addition, when a base resin layer is provided on the base material layer side of the laminate by injection molding, the adhesive layer and the transparent resin layer of the laminate are thermally welded by heat during injection molding of the base resin layer material. Therefore, it is expected to shorten the manufacturing process.

It is a schematic diagram which shows one Embodiment of the laminated body of this invention which consists of a transparent resin layer / adhesion layer / base material layer. It is a schematic diagram which shows one Embodiment of the laminated body of this invention which consists of a transparent resin layer / printing layer / adhesion layer / base material layer. It is a schematic diagram which shows one Embodiment of the molded object of this invention which consists of a transparent resin layer / printing layer / adhesion layer / base material layer / base material resin layer.

  The laminate of the present invention includes a transparent resin layer containing polyolefin, an adhesive layer having an adhesive strength within a range of 0.01 N / 25 mm to 10 N / 25 mm, and a base material layer containing polyolefin in this order. It is characterized by becoming.

In the specification of the present application, the “laminate” means a laminate having a planar shape, and a substrate layer, an adhesive layer and a transparent resin layer or a transparent resin sheet bonded together.
In the specification of the present application, the “laminate” has a planar shape and means a laminate of a base material layer, an adhesive layer, a printed layer, and a transparent resin layer or a transparent resin sheet.
The “molded product” means a product obtained by heating the “laminate” and thermally welding the adhesive layer of the laminate to the transparent resin layer. However, in a molded body having a base resin layer, in order to distinguish it from the base resin layer portion, the heated laminate (which itself is a molded body) is referred to as a “laminate portion”.

  The transparent resin layer is a transparent sheet or transparent film containing polyolefin. Here, “transparent” means that the haze value is in the range of 0.1% to 60%, preferably 0.1 to 30%. If the haze value is within the above range, a print or the like applied on one surface can be sufficiently seen from the surface of the molded body, and a molded body having a good design can be obtained.

  The polyolefin contained in the transparent resin layer is preferably a propylene resin.

If necessary, the transparent resin layer may contain a resin such as a metallocene ethylene-α-olefin copolymer, a polyolefin elastomer, and a low stereoregular olefin polymer.
In the case of blending the resin, when the total amount of the resin is 100% by weight, the blending amount of the polyolefin is preferably 80% by weight or more, more preferably 90% by weight or more, and further preferably 95% by weight or more. .

  Furthermore, you may mix | blend additives, such as a pigment, anti-aging agent, a stabilizer, a ultraviolet absorber, a nucleating agent, with a transparent resin layer as needed.

  The thickness of the transparent resin layer may be appropriately selected according to the purpose, but is preferably in the range of 20 to 1,500 μm. The transparent resin layer may be formed of a single layer or a plurality of layers.

  The transparent resin layer uses, for example, a rapid cooling method disclosed in Japanese Patent No. 4237275, a rapid cooling and heating method disclosed in Japanese Patent No. 3193801, and a nucleating agent disclosed in Japanese Patent Application Laid-Open No. 2002-226647. What was manufactured by the method which did it can be used suitably.

  Moreover, a commercially available sheet | seat or film may be used for a transparent resin layer, for example, using pure thermo AG-301X, super pure array EG-170TC (all are a registered trademark, Idemitsu Unitech Co., Ltd. product), etc. are used. it can.

  A base material layer will not be specifically limited if it is a sheet | seat or film containing the polyolefin generally used as a support body.

  Examples of the polyolefin that can be used as the base material layer include low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, ethylene-α olefin copolymer, ethylene-vinyl acetate copolymer, and ethylene-ethyl acrylate. Examples thereof include a copolymer, an ethylene-methyl methacrylate copolymer, an ethylene-n-butyl acrylate copolymer, and polypropylene (homopolymer, random copolymer, block copolymer). These resins may be used alone or as a mixture in any combination. In particular, block copolymer polypropylene (BPP) is preferable as the material of the base material layer. By using BPP, tear strength and impact strength can be improved, and heat resistance and rigidity can be imparted.

You may mix | blend additives, such as a pigment, anti-aging agent, a stabilizer, and an ultraviolet absorber, with a base material layer as needed.
Furthermore, the base material layer may be formed of a plurality of layers. The total thickness of the single-layer or multiple-layer base material layer is preferably, for example, 30 to 1,000 μm.

  The pressure-sensitive adhesive layer preferably contains a tackifier, and one or more selected from the group consisting of a styrene elastomer, ethylene vinyl alcohol, polyethylene and polyolefin, a styrene elastomer, a polyolefin, a tackifier, It is more preferable to contain. The pressure-sensitive adhesive layer can be composed of 90% or more, 95% or more, or 98% or more from one or more selected from the group consisting of a tackifier, styrene elastomer, ethylene vinyl alcohol, polyethylene, and polyolefin.

The styrenic elastomer compounded in the adhesive layer is a general formula
A-B-A, or
AB
It is a block copolymer represented by these. As the constituent component A, that is, the styrene polymer block, those having an average molecular weight of about 12,000 to 100,000 and a glass transition temperature of 20 ° C. or more are preferable.
The other component B, that is, a butadiene polymer block, an isoprene polymer block, or a polymer block obtained by hydrogenating these, has an average molecular weight of about 10,000 to 300,000 and a glass transition. A temperature of −20 ° C. or lower is preferable.
A preferable weight ratio of the component A and the component B is A / B = 5/95 to 50/50, more preferably 10/90 to 30/70. The weight ratio of the ternary block copolymer represented by the general formula A-B-A and the binary block copolymer represented by the general formula AB is A-B-A / A-B = 100 / 0 to 20/80, more preferably 100/0 to 50/50.

  Examples of the polyolefin blended in the adhesive layer include, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, ethylene-α olefin copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate. Examples thereof include a copolymer, an ethylene-methyl methacrylate copolymer, an ethylene-n-butyl acrylate copolymer, and polypropylene (homopolymer, random copolymer, block copolymer). Of these polyolefins, polypropylene is preferred. Polypropylene has good compatibility with styrene-based elastomers, is excellent in heat resistance, and is less susceptible to contamination of the adherend due to bleeding.

As the tackifier added to the adhesive layer, a resin that is selectively compatible with the styrene elastomer can be used.
Examples of such resins include aliphatic hydrocarbon resins, terpene resins, coumarone / indene resins, aromatic hydrocarbon resins, and rosin resins.

  Moreover, you may mix | blend additives, such as softeners, such as a liquid polymer and paraffin oil, a filler, a pigment, an antiaging agent, a stabilizer, and an ultraviolet absorber, with the adhesion layer.

It is preferable that an adhesion layer contains 10-200 weight part polyolefin and 3-100 weight part tackifier with respect to 100 weight part of styrene-type elastomers.
The polyolefin content is preferably 15 to 100 parts by weight, more preferably 20 to 60 parts by weight, and the tackifier content is preferably 5 to 50 parts by weight.

  The thickness of the pressure-sensitive adhesive layer is 5 μm or more and 25 μm or less, preferably 10 μm or more and 20 μm or less.

The adhesive strength of the adhesive layer is in the range of 0.01 N / 25 mm to 10 N / 25 mm, and preferably in the range of 0.05 N / 25 mm to 1.5 N / 25 mm. If the adhesive strength is less than 0.01 N / 25 mm, handling may deteriorate, such as peeling by conveyance until thermoforming. If it exceeds 10 N / 25 mm, re-bonding at the time of misalignment becomes difficult, and the yield is low. May get worse.
Here, the adhesive strength is such that a multilayer film composed of a base material layer and an adhesive layer is pressure-bonded to an adherend (transparent resin layer) under conditions of a linear pressure of 0.38 MPa and 2 m / min, and stored at 23 ° C. for 24 hours. To do. Then, using a tensile tester, peeling is performed at a pulling speed of 0.3 m / min and 180 ° peel, and the resistance value at that time is defined as the adhesive strength.

  In order to make the adhesive strength of the adhesive layer within a predetermined range, the blending amounts of styrene elastomer, polyolefin, tackifier and the like constituting the adhesive layer may be adjusted.

Moreover, it is preferable that the laminated body of this invention further comprises a printing layer between the said transparent resin layer and the said adhesion layer.
The print layer is formed by printing a pattern and / or color on one side of the transparent resin layer by a method such as screen printing, offset printing, or gravure printing. By adhering the adhesive layer of the multilayer film to the printed surface, the printed pattern and color can be protected.

The ink used when printing on one side of the transparent resin layer is not particularly limited, and may be appropriately selected according to the material of the transparent resin layer. For example, in the case of screen printing, Teikoku Ink Manufacturing Co., Ltd., IPX-HF979 black, POS-911 black, etc. are mentioned.
In the case of screen printing, for example, the printing layer can be formed by printing using T-250 mesh and drying in a drying furnace at 60 ° C. for 90 minutes.

  FIG. 1 shows a laminate I which is an embodiment of the present invention. The laminate I has a three-layer structure as shown in FIG. 1 and is composed of a multilayer film 1 and a transparent resin layer 2, and the multilayer film 1 is composed of an adhesive layer 1a and a base material layer 1b.

  FIG. 2 shows a laminate I which is another embodiment of the present invention. The laminate I has a four-layer structure as shown in FIG. 2, and is composed of a multilayer film 1, a transparent resin layer 2, and a printing layer 2a. The multilayer film 1 is composed of an adhesive layer 1a and a base material layer 1b. The print layer 2 a is inside the transparent resin layer 2 (on the adhesive layer 1 a side) and is in contact with the adhesive layer 1 a of the multilayer film 1.

The method for producing the laminate of the present invention comprises:
First, a multilayer film (1) is formed by laminating at least an adhesive layer (1a) having an adhesive strength within a range of 0.01 N / 25 mm to 10 N / 25 mm and a base material layer (1b) containing polyolefin. And a second step of bonding the adhesive layer (1a) of the multilayer film (1) to a transparent resin sheet (2) including a layer containing polyolefin.

  In the first step, the pressure-sensitive adhesive layer (1a) and the base material layer (1b) are preferably multilayered by multilayer extrusion molding or lamination. Conventionally known methods can be used for multilayer extrusion molding and laminating for multi-layering the adhesive layer (1a) and the base material layer (1b), and examples thereof include a two-layer coextrusion method.

According to the said method, a base material layer (1b) and an adhesion layer (1a) can be laminated | stacked at a time without a solvent. By multilayering the adhesive layer (1a) and the base material layer (1b) in advance, a laminate can be formed with a relatively simple manufacturing apparatus.
Moreover, the manufacturing cost of a laminated body can be restrained cheaply by simplification of a manufacturing process. Furthermore, in the multilayer film formed by the coextrusion method, while the interlayer strength between the surface of the base material layer and the adhesive layer is strong, the adhesive strength of the adhesive layer is moderate, so re-bonding at the time of misalignment Therefore, even if the transparent resin sheet (2) is peeled off, it is difficult for adhesive to remain.

In the second step, the adhesive layer (1a) of the multilayer film (1) is bonded to the transparent resin sheet (2) including a polyolefin-containing layer on the adhesive layer (1a) side to form a laminate. . When the transparent resin sheet (2) is a sheet composed of a plurality of layers, a layer containing a polyolefin (transparent resin layer) is bonded to the adhesive layer (1a). Bonding is usually performed at room temperature. When the adhesive layer has a predetermined adhesive strength and is bonded at room temperature, even if there is a positional shift, it can be peeled off once and bonded again, and the yield of the laminate is improved.
The transparent resin sheet may be composed of only “a layer containing polyolefin”, but may include other layers.

  Moreover, a 2nd process is a process of bonding the said adhesion layer (1a) of the said multilayer film (1) to this printing surface of the said transparent resin sheet (2) on which the pattern and / or color were printed. Is preferred. By this step, a laminate having a pattern and / or color used for decoration can be produced.

The molded body of the present invention is characterized by using the laminate of the present invention.
The molded body of the present invention preferably further has a base resin layer on the base layer side. Thus, the decorated molded object can be easily obtained by using the laminated body of this invention.
The schematic diagram of one Embodiment of the molded object of this invention which consists of a transparent resin layer / printing layer / adhesion layer / base material layer / base material resin layer is shown in FIG.
This molded body III is composed of a laminate portion I and a base resin layer II, and the laminate portion I is composed of a transparent resin layer 2, a printing layer 2a, and a multilayer film 1. The multilayer film 1 is a laminate film of an adhesive layer 1a and a base material layer 1b, and the adhesive layer 1a is fused to the printing layer 2a. For example, the base resin layer II is formed by injection-molding polypropylene, the adhesive layer 1a is made of a styrene-based elastomer, polyolefin, and a tackifier, and the base material layer 1b is made of polypropylene.

  The base resin layer is made of a resin that can be welded to the base material layer 1 b of the multilayer film 1. For example, it is preferably made of an olefin resin and a propylene resin, but this is not a limitation.

  Although the method for providing the base resin layer is not particularly limited, it is preferably formed by injection molding.

  The manufacturing method of the molded object of this invention is characterized by including the process which heats the laminated body (I) of this invention, and makes it a desired shape.

In order to produce a molded body having a desired shape, it is preferable to use a mold. When using a metal mold | die, the timing which heats laminated body (I) may be before putting in a metal mold | die, and may be after putting into a metal mold | die. The laminated body of the present invention can be formed into a desired shape by being inserted into a mold and then heated by the molten injection resin. In this case, after inserting into a metal mold | die, it can also be made into a final shape with the heat | fever etc. of the molten injection resin after making it into a desired shape by mold closing.
In the molding process, at least one surface of the laminate (I) is heated to a range of 100 ° C. to 170 ° C. with an infrared heater, a heating plate, etc., and pressed against the mold by a method such as vacuum, compressed air, or vacuum / compressed air. May be performed. The heating may be performed simultaneously with the formation of the base resin layer by the heat of the molten injection resin in a state where the laminate (I) is inserted into the mold. In this case, the transparent resin layer and the adhesive layer, and the base material layer and the base resin layer can be welded simultaneously with the shaping.
In the case where a base resin layer is provided on the base material layer side of the laminate by injection molding, the base resin layer and the base material layer of the laminate are formed by heat during injection molding of the base resin layer material. Welded.

In this step, the adhesive layer (1a) and the transparent resin sheet (2) are thermally welded by applying heat to the laminate (I).
Here, the heating of the laminate (I) is such that the pressure-sensitive adhesive layer (1a) and the transparent resin sheet (2) are thermally welded, and the multilayer film (1) can be easily maintained in the transparent resin sheet (2) while maintaining its shape. It is sufficient that the temperature and time are sufficient to make it impossible to peel off the film. The heating temperature is preferably in the range of 100 ° C. to 170 ° C., more preferably 120 ° C. to 160 ° C., as the sheet surface temperature. If it is the said temperature range, sufficient heat welding will be achieved. Moreover, what is necessary is just to adjust a heating time suitably according to a heating method. The said heating can also be implemented by making injection resin contact the at least single side | surface of laminated body (I), for example.

In the method for producing a molded body of the present invention, the step of inserting the laminate (I) into a mold, and injecting a resin onto the substrate layer side of the laminate (I) inserted into the mold, An injection step of providing the resin layer (II).
The material of the base resin layer (II) is as described in the description of the molded body of the present invention.

  Specifically, in the injection step, the mold in which the laminate (I) of the present invention is inserted is closed to obtain a desired shape, and then a molten molding resin is injected into the mold cavity to be molded. At the same time that the adhesive layer (1a) of the laminate (I) and the transparent resin sheet (2) are thermally welded by the heat of the resin, the substrate layer (1b) and the substrate resin layer (II) of the laminate (I) ) Are thermally welded, and at the same time as the molding resin is solidified, a decorative resin molded product in which the decorative sheet (molded body) made of the laminate (I) of the present invention is integrally bonded to the surface of the molding resin is obtained. .

It is possible to easily manufacture a resin molded product having a decorated three-dimensional shape by the molded body of the present invention in which the printing surface (printing layer) of the transparent resin layer (2) and the adhesive layer are thermally welded. it can.
According to the method for producing a molded body of the present invention using the laminate of the present invention, a large-scale apparatus is not required, and the laminated body of the present invention can be easily reattached to a transparent resin layer having a printed layer. Therefore, the yield can be improved, and further, by using the laminate of the present invention, a molded product can be produced without any particular limitation on the amount of processing at one time.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited at all by these Examples.

The materials used for the production of the laminates and molded bodies in the examples are as follows.
-Transparent polypropylene sheet: Pure Thermo (registered trademark) AG-301X, manufactured by Idemitsu Unitech Co., Ltd., thickness 0.2 mm

Adhesive layer material: 100 parts by weight of a styrene elastomer containing a vinyl-polyisoprene block, 35 parts by weight of a propylene homopolymer, and 16 parts by weight of a copolymer petroleum resin of an aromatic petroleum resin and dicyclopentadiene as a tackifier Were mixed to prepare an adhesive layer material.
The adhesive strength of the adhesive layer was 1.1 N / 25 mm. The adhesive strength was measured by pressing a multilayer film composed of a base material layer and an adhesive layer onto an adherend (polypropylene transparent resin sheet) under conditions of a linear pressure of 0.38 MPa and 2 m / min, and 24 ° C. at 24 ° C. Save time. Thereafter, using a tensile tester, the adherend was peeled off at a pulling rate of 0.3 m / min and 180 ° peel, and the resistance value at that time was defined as the adhesive strength.

・ Base material: Polypropylene block copolymer (BPP)

  The adhesive layer material and the base material layer material are coextruded by a two-layer coextrusion method so that the adhesive layer has a thickness of 11 μm and the base material layer has a thickness of 39 μm. Obtained.

Example 1
A multilayer film of adhesive layer / base material layer was laminated to a transparent polypropylene sheet having a thickness of 0.2 mm at room temperature with the adhesive layer side facing the transparent polypropylene sheet. The laminate was thermoformed (heated to a sheet surface temperature of 135 ° C. with an infrared heater) to weld the adhesive layer to obtain a formed body.

Example 2
An ink layer is applied to one side of a transparent polypropylene sheet having a thickness of 0.2 mm by screen printing, and the multilayer film of the adhesive layer / base material layer is laminated at room temperature with the adhesive layer side facing the ink layer. It was. The pressure-sensitive adhesive layer was welded by thermoforming the laminated body (heating the sheet surface temperature to 135 ° C. with an infrared heater) to obtain a molded body.

Example 3
An ink layer is applied to one side of a transparent polypropylene sheet having a thickness of 0.2 mm by offset printing, and the multilayer film of the adhesive layer / base material layer is laminated at room temperature with the adhesive layer side facing the ink layer. It was. The pressure-sensitive adhesive layer was welded by thermoforming the laminated body (heating the sheet surface temperature to 135 ° C. with an infrared heater) to obtain a molded body.

Example 4
An ink layer is applied to one side of a transparent polypropylene sheet having a thickness of 0.2 mm by gravure printing, and a multilayer film of adhesive layer / base material layer is laminated at room temperature with the adhesive layer side facing the ink layer. It was. The pressure-sensitive adhesive layer was welded by thermoforming the laminated body (heating the sheet surface temperature to 135 ° C. with an infrared heater) to obtain a molded body.

Examples 5-7
After inserting the laminated body (before thermoforming) obtained in Examples 2 to 4 into an injection mold and closing the mold to a desired shape, polypropylene resin (base resin) ) To obtain a molded body in which the base material resin layer was integrated on the base material layer side.

<Evaluation of molded body>
Evaluation Example 1
The adhesion strength between the adhesive layer and the transparent resin layer of the molded bodies obtained in Examples 1 to 4 was measured and evaluated as follows. The results are shown in Table 1.
Each molded body is cut to a width of 25 mm, and the film of the adhesive layer / base material layer is peeled from the transparent resin layer at a tensile rate of 0.3 m / min and 180 ° peel with a tensile tester, and the resistance value at that time Was the welding strength. When it was completely welded and the adhesive layer / substrate layer film could not be peeled off from the transparent resin layer, it was expressed as “welding”.

Evaluation example 2
The welding strength between the adhesive layer and the transparent resin layer of the molded body having the base resin layer obtained in Examples 5 to 7 was measured and evaluated as follows. The results are shown in Table 2.
A 15 mm width cut was made in the laminate on the base resin of the molded body, and with a tensile tester, the tensile speed was 0.3 m / min, and the 180 ° peel from the transparent resin layer to the adhesive layer / base material layer. The film was peeled off, and the resistance value at that time was measured as the welding strength.
The adhesion was marked as ◯ at 10 N / 15 mm or more, Δ at 5 N / 15 mm or more, and x at less than that.

  In the molded bodies obtained in Examples 2 to 7 in which the transparent resin layer was printed, the printed patterns and / or colors were neatly formed on the molded body surface.

By using the laminate of the present invention, it is possible to perform a beautiful decoration process on the surface of the object.
The laminate and molded body of the present invention are useful in the decoration technology of resin molded products having a three-dimensional shape by insert molding, such as decoration of interior and exterior of automobiles and two-wheeled vehicles, home appliance housings, building materials, information devices, etc. Used as a nameplate.

Although several embodiments and / or examples of the present invention have been described in detail above, those skilled in the art will appreciate that these exemplary embodiments and / or embodiments are substantially without departing from the novel teachings and advantages of the present invention. It is easy to make many changes to the embodiment. Accordingly, many of these modifications are within the scope of the present invention.
The contents of the documents described in this specification and the specification of the Japanese application that is the basis of Paris priority of the present application are all incorporated herein.

Claims (15)

A transparent resin layer containing polyolefin,
A laminate comprising an adhesive layer having an adhesive strength within a range of 0.01 N / 25 mm to 10 N / 25 mm, and a base material layer containing polyolefin in this order. A transparent resin layer containing polyolefin,
Printing layer,
A laminate comprising an adhesive layer having an adhesive strength within a range of 0.01 N / 25 mm to 10 N / 25 mm, and a base material layer containing polyolefin in this order.   The laminate according to claim 1 or 2, wherein the pressure-sensitive adhesive layer contains a tackifier and at least one selected from the group consisting of a styrene-based elastomer, ethylene vinyl alcohol, polyethylene, and polyolefin.   The laminate according to claim 3, wherein the adhesive layer contains a styrene elastomer, a polyolefin, and a tackifier. The styrenic elastomer has a general formula
A-B-A, or
AB
(Wherein, A is a styrene polymer block, and B is a butadiene polymer block, an isoprene polymer block, or a polymer block obtained by hydrogenating these). The laminate according to claim 3 or 4, wherein the laminate is provided.   The laminate according to any one of claims 1 to 5, wherein the transparent resin layer has a haze value of 0.1% to 60%. A first step of forming a multilayer film by laminating at least an adhesive layer having an adhesive strength within a range of 0.01 N / 25 mm to 10 N / 25 mm and a base material layer containing polyolefin; and a layer containing polyolefin The manufacturing method of the laminated body characterized by having a 2nd process of bonding the said adhesion layer of the said multilayer film to the transparent resin sheet containing this.   The method for producing a laminate according to claim 7, wherein the adhesive layer and the base material layer are multilayered by multilayer extrusion molding or lamination.   9. The method according to claim 7, wherein the second step is a step of bonding the adhesive layer of the multilayer film to the printed surface of the transparent resin sheet on which a pattern and / or color is printed. The manufacturing method of the laminated body of description.   The above-mentioned adhesion of a multilayer film obtained by laminating an adhesive layer having an adhesive strength within a range of 0.01 N / 25 mm to 10 N / 25 mm and a base material layer containing polyolefin on a transparent resin sheet containing a layer containing polyolefin A laminate made by laminating layers.   The molded object using the laminated body in any one of Claims 1-6 and 10.   The molded body according to claim 11, further comprising a base resin layer on the base layer side of the laminate.   The molded body according to claim 12, wherein the base resin layer is formed by injection molding.   The manufacturing method of the molded object characterized by applying heat to the laminated body in any one of Claims 1-6 and 10, and making it into a desired shape. A step of inserting the laminate according to any one of claims 1 to 6 and 10 into a mold, and injecting a resin to a base layer side of the laminate inserted into the mold to provide a base resin layer The manufacturing method of the molded object characterized by having an injection process.

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