JP6425495B2 - METHOD FOR MANUFACTURING DECORATED MOLDED ARTICLE AND DECORATED MOLDED ARTICLE - Google Patents

Description

  The present invention relates to a method for producing a decorated molded product, and a decorated molded product produced using the method for producing a decorated molded product.

BACKGROUND ART In various products such as electric telephone covers and the like, interior products for vehicles, motorcycle cowlings and the like, designs such as patterns, designs and characters are applied to the surface of molded articles for decoration.
For example, a decorative molded product is manufactured by attaching a decorative film to the surface of a core material having a complicated surface shape such as a three-dimensional curved surface using vacuum forming, vacuum / pressure forming, etc. There is.
Here, as a decorating film, the film in which the printing layer was formed in one side of a base film, and the adhesive bond layer was formed in the other side is generally used.

In the method of manufacturing a decorated formed product using such vacuum forming or vacuum / pressure forming, after the decorative film is attached to the surface of the core material, it remains in the vicinity of the outer periphery of the decorated area of the core material. It is necessary to carry out a trimming step of removing the surplus portion of the decorative film (the portion which has not been stuck to the core material).
Therefore, various trimming methods have been proposed in order to carry out the trimming step accurately and simply in the method of manufacturing the decorated formed product (see, for example, Patent Documents 1 and 2).

JP, 2010-228143, A JP, 2013-71271, A

On the other hand, since the trimming step is a step of removing the excess portion of the decorative film as described above, it is a step which is not necessary to be carried out if there is no excess portion in the decorative film attached to the core material.
However, in the method of manufacturing a decorated molded product using vacuum molding or vacuum / pressure forming, when the decorative film is set in the molding machine, a site for holding the decorative film is required, and the decorative film itself is Generally, the decorative film is sufficiently large relative to the surface to be decorated of the core material (the surface to which the decorative film is to be attached) because it may play a role in securing the air tightness in the molding machine, etc. It was
Therefore, the trimming process is an essential process that can not be excluded in the present method of manufacturing a decorated molded product.

  The present invention is an invention made in view of such a present situation, and an object thereof is to provide a method for producing a decorative formed article which does not need to perform a trimming process after attaching a decorative film to a core material. It is.

In order to achieve the above object, the method for producing a decorative molded article of the present invention is a method for producing a decorative molded article, wherein a decorative film is attached to the surface of a core material by vacuum molding or vacuum pressure forming. A decoration film consists of a decoration field pasted to the above-mentioned core material, and a non decoration field provided around the above-mentioned decoration field, and it is characterized by performing the process of following (A)-(E) I assume.
(A) A step of forming a cut line penetrating the decorative film in the thickness direction at the boundary between the decorative area and the non-decorating area of the decorative film.
(B) A step of laminating an application film on the decorative film.
(C) A step of attaching the decorative film on which the application film is laminated to a core material.
(D) A step of peeling the application film from the decorative film attached to the core material.
(E) The process of removing the said non-decoration area | region of the said decoration film.

It is preferable to perform the process of following (F), before performing the process of said (A)-(E) in the manufacturing method of the decorating molded article of this invention.
(F) A step of determining the boundary between the above-mentioned decorated area and the above-mentioned non-decorated area.

  In the method for producing a decorative molded article of the present invention, the adhesive strength of the application film to the decorative film is preferably 1.0 to 20 N / 25 mm.

In the method for producing a decorative molded article of the present invention, the decorative film includes a base film (first base film) and an adhesive layer, and the base film (first base film) is chlorided. It is preferable to consist of a vinyl-based resin composition (firstly, a vinyl chloride-based resin composition).
Further, in the method for producing the decorative molded article, the application film includes a base film (second base film) and an adhesive layer, and the base film (second base film) is vinyl chloride. It is preferable to consist of a base resin composition (a second vinyl chloride resin composition).

  The decorated molded article of the present invention is characterized by being produced using the method of producing a decorated molded article of the present invention.

According to the method of manufacturing a decorated formed product of the present invention, a decorated formed product can be manufactured without performing a trimming process after attaching a decorated film to a core material.
The decorative molded article of the present invention is produced using the method of producing a decorative molded article of the present invention, and the core material is made of a decorative film in which a decorative area and a non-decorating area are separated in advance. It is decorated. Therefore, the edge part of a decoration film is smooth and it is a decoration molded article without hookability.

It is sectional drawing which shows typically an example of the laminated body of the decoration film and application film which are used with the manufacturing method of the decoration molded article of this invention. It is process drawing for demonstrating an example of the order of each process in the manufacturing method of the decorative molded product of this invention. (A)-(c) is a schematic diagram for demonstrating the manufacturing method of the decorating molded article of this invention. (D)-(f) is a schematic diagram for demonstrating the manufacturing method of the decorating molded article of this invention. It is process drawing for demonstrating another example of the order of each process in the manufacturing method of the decorative molded product of this invention. It is a perspective view for demonstrating the decorative molded article produced in the Example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The method for producing a decorative molded article according to the present invention is a method for producing a decorative molded article, wherein a decorative film is attached to the surface of a core material by vacuum molding or vacuum pressure forming, and the decorative film is the core It consists of the decoration area | region affixed on material, and the non-decoration area | region provided around the said decoration area | region, and performs the process of following (A)-(E).
(A) A step of forming a cut line penetrating the decorative film in the thickness direction at the boundary between the decorative area and the non-decorating area of the decorative film.
(B) A step of laminating an application film on the decorative film.
(C) A step of attaching the decorative film on which the application film is laminated to a core material.
(D) A step of peeling the application film from the decorative film attached to the core material.
(E) The process of removing the said non-decoration area | region of the said decoration film.

The method for producing a decorated molded product of the present invention decorates the surface of the core material by sticking the decorated film on which the application film is laminated to the surface of the core material by vacuum molding or vacuum pressure molding.
First, a decorative film, an application film, and a core material to be used in the method of producing a decorative molded article of the present invention will be described.

FIG. 1: is sectional drawing which shows typically the state which laminated | stacked the application film on the decoration film before bonding to a core material.
As shown in FIG. 1, the decoration film 10 used by this invention is equipped with the 1st base film 11 and the adhesive bond layer 12 laminated | stacked on the lower surface. Furthermore, in the decorative film 10, the print layer 13 is formed on the upper surface of the first base film, and the separator 14 is provided on the side of the adhesive layer 12 opposite to the base film 11.
In the above-mentioned decoration film, printing layer 13 is an arbitrary layer. Further, the separator layer is also an optional layer, and of course, it is peeled off before the decorative film is attached to the core material.
Furthermore, although not shown in FIG. 1, a surface protective layer may be laminated on the upper surface of the first base film 11 (or the upper surface of the print layer 13).

  The application film 20 used in the present invention includes a second base film 21 and an adhesive layer 22 laminated on the lower surface thereof. The application film 20 is used by being attached to the decorative film 10 with the adhesive layer 22 as shown in FIG.

  Moreover, in the method for producing a decorative molded product of the present invention, before the decorative film 10 is attached to the core material, the decorative film 10 is provided with the decorative region 10a to be attached to the core material and the periphery of the decorative region 10a. The cut line 15 which penetrates the decoration film 10 in the thickness direction is formed in the boundary with the non-decoration area | region 10b provided in these. The method of forming the cut line will be described later.

<Decorated film>
The first base film 11 constituting the decorative film 10 is made of a resin composition. Here, as the resin composition, a vinyl chloride resin composition (first vinyl chloride resin composition) is preferable.
The first vinyl chloride resin composition contains a vinyl chloride resin and a plasticizer.
Examples of the vinyl chloride-based resin include homopolymers of vinyl chloride, and copolymers of vinyl chloride and other monomers copolymerizable therewith.
Examples of the other copolymerizable monomers include vinyl esters such as vinyl acetate and vinyl propionate, olefins such as ethylene, propylene and styrene, methyl acrylate, ethyl acrylate and methyl methacrylate. ) Acrylic esters, diesters of maleic acid such as dibutyl maleate and diethyl maleate, diesters of fumaric acid such as dibutyl fumarate and diethyl fumarate, vinyl cyanides such as acrylonitrile and methacrylonitrile, vinylidene chloride, vinyl bromide and the like Examples thereof include vinyl ethers such as halogenated vinyl, methyl vinyl ether and ethyl vinyl ether. These may be used alone or in combination of two or more.

The content of the other copolymerizable monomer in the copolymer is usually 50% by weight or less, preferably 10% by weight or less. If it exceeds 50% by weight, the bending resistance of the decorative film may be reduced, and for example, it may not be suitable for application to a core material.
Among the above-mentioned vinyl chloride resins, homopolymers of vinyl chloride are preferable from the viewpoint of excellent printability and visibility and further excellent dimensional stability.

The vinyl chloride resin preferably has an average degree of polymerization of 700 to 1,400.
In this case, it is excellent in printability (for example, coloring property at the time of printing, fixing property of the ink, etc.) when forming a printing layer using solvent type ink. On the other hand, if the average degree of polymerization is less than 700, the solvent-based ink is absorbed too much, and the ink blurs in a swollen state in the film, so that the coloring property and the sharpness during printing are insufficient. Become. On the other hand, if the average degree of polymerization exceeds 1400, the absorption capacity of the solvent-based ink is low, the ink hardly penetrates into the film, and the ink adheres to the surface of the film. May lose their clarity.
In the present invention, the average degree of polymerization of the vinyl chloride resin means an average degree of polymerization measured in accordance with JIS K-6721 "Test method of vinyl chloride resin".

The plasticizer preferably has a molecular weight of 350 to 3,000.
If the molecular weight is less than 350, it is easy to bleed from the first base film, and when the plasticizer bleeds, it transfers to the adhesive layer to lower the adhesion of the adhesive layer or transfers to the surface of the base film. When the printing layer is formed, printing unevenness may occur.
On the other hand, when the molecular weight exceeds 3000, the plasticizer absorbs too much ink, and when the print layer is formed, the image may be blurred to reduce the sharpness of the print layer.

In addition, when the said plasticizer consists of a high molecular compound, the molecular weight is a number average molecular weight.
The said number average molecular weight is a measured value of polystyrene conversion by GPC (gel permeation chromatograph) measurement.
The said GPC measurement is performed according to a usual method. For example, a dilute tetrahydrofuran solution of a plasticizer to be measured is prepared, and measurement is performed using a Tosoh GPC measurement apparatus "HLC-8220GPC" at a flow rate condition of 0.6 ml / min. For the columns, "KF606M" and "KF603" manufactured by Showa Denko KK are used.

Specific examples of the plasticizer include, for example, octyl phthalate (di-2-ethylhexyl phthalate (DOP)), dibutyl phthalate, diesters of phthalic acid such as dinonyl phthalate, cyclohexane dicarboxylic acid esters, dioctyl adipate, sebacic acid Aliphatic dibasic acid diesters such as dioctyl, phosphoric acid triesters such as tricresyl phosphate and trioctyl phosphate, epoxy plasticizers such as epoxidized soybean oil and epoxy resin, polymeric polyester plasticizers, etc. .
Examples of the high-molecular polyester plasticizer include polyalkylene glycol diesters such as polyethylene glycol diesters of phthalic acid, polypropylene glycol diesters, polyethylene glycol polypropylene glycol diesters, and polyethylene glycols of aliphatic dibasic acids such as adipic acid and sebacic acid. Polyalkylene glycol diesters such as diesters, polypropylene glycol diesters, polyethylene glycol polypropylene glycol diesters, etc. may be mentioned.
These may be used alone or in combination of two or more.

  The blending amount of the plasticizer is preferably 5 to 30 parts by weight with respect to 100 parts by weight of the vinyl chloride resin. If the blending amount of the plasticizer is less than 5 parts by weight, the absorptivity of the solvent-based ink in the first base film may be insufficient and bleeding may occur, and the printability of the solvent-based ink may be inferior. On the other hand, if it exceeds 30 parts by weight, the absorbability of the solvent-based ink in the first base film becomes too good, and the dots of the ink overlap during printing, which may impair the color development of the ink.

  The first vinyl chloride resin composition is a stabilizer, a coloring agent, a foaming agent, a lubricant, a modifier, an inorganic particle and an inorganic fiber, which are generally used in the vinyl chloride resin composition as needed. And various additives such as fillers and diluents.

The thickness of the first base film 11 is preferably 40 to 300 μm.
If the thickness of the first base film 11 is less than 40 μm, the strength of the film may be insufficient and the decorative formability may be inferior. On the other hand, if it exceeds 300 μm, it may not be possible to follow the surface shape of the core material. More preferably, it is 80-200 micrometers.

The print layer 13 is formed of an image of an arbitrary pattern, characters, patterns or the like.
The printing layer 13 is preferably formed on the surface of the first base film 11 using a solvent-based ink.
The printing layer 13 formed using the solvent-based ink is fixed to the surface of the first base film in a state of being soaked in the first base film 11. Therefore, the sharpness and the fastness of the image are excellent.

As the solvent-based ink, a conventionally known solvent-based ink mainly composed of a solvent, a pigment, a vehicle, and an auxiliary agent which is further optionally blended may be used.
Above all, a solvent-based ink containing a vinyl-based resin such as a vinyl chloride-vinyl acetate copolymer-based resin, an acrylic-vinyl acetate copolymer-based resin, or an acrylic-based resin as a vehicle has adhesion to the substrate film. It is preferable at the point which is excellent in. The above vehicles may be used in combination of two or more.

Examples of the solvent include glycol ether solvents such as diethylene glycol diethyl ether, tetraethylene glycol dimethyl ether and tetraethylene glycol monobutyl ether, lactone solvents such as γ-butyrolactone, low boiling point aromatic naphtha, propylene glycol monomethyl ether acetate and the like It can be mentioned.
Examples of the pigment include carbon black (black), copper phthalocyanine (cyan), dimethylquinacridone (magenta), pigment yellow (yellow), titanium oxide, aluminum oxide, zirconium oxide, a nickel compound and the like. Various other pigments are already known as the pigment, and the present invention is not limited to the above.

  Specific examples of such solvent-based inks include, for example, SS21 ink, ES3 ink (both manufactured by Mimaki), Eco-Sol MAX (manufactured by Roland), and the like.

It does not specifically limit as method to form the printing layer 13, The conventionally well-known printing methods, such as direct gravure, offset printing, screen printing, flexographic printing, electrostatic printing, inkjet printing, can be used. Of these, inkjet printing is preferred. The reason is that it is easy to cope with high-mix, small-lot production.
Although the inkjet apparatus used by the said inkjet printing is not specifically limited, For example, CJV-30, TPC-1000 (both are made by Mimaki), XC-540, SP-300 (both made by Roland) etc. are mentioned.

The adhesive layer 12 is preferably a layer made of a hot melt adhesive (hot melt adhesive layer).
Examples of the hot melt adhesive include polyester hot melt adhesives, acrylic hot melt adhesives, rubber hot melt adhesives, silicone hot melt adhesives and the like.
Since the hot melt adhesive layer does not contain a solvent, it is suitable for performing decoration using a decoration film by vacuum forming or vacuum / pressure forming.

The thickness of the adhesive layer 12 is preferably 25 to 50 μm.
If the thickness of the adhesive layer 12 is less than 25 μm, sufficient adhesion with the core material may not be secured. On the other hand, if it exceeds 50 μm, cohesive failure may easily occur in the adhesive layer, or it may be difficult to coat the adhesive layer so that its surface is smooth.

As shown in FIG. 1, the separator 14 may be laminated on the side opposite to the first base film 11 side of the adhesive layer 13.
The separator 14 is not particularly limited, and a conventionally known one can be used. For example, a resin film such as a PET film or a polypropylene film surface-treated with a silicone resin can be suitably used.

  Moreover, in the decoration film 10, surface processings, such as embossing, may be given to the surface of the 1st base film 11 or the printing layer 13 as needed.

Furthermore, in the decorative film 10, a surface protective layer may be laminated on the upper surface of the first base film 11 or the print layer 13.
The surface protective layer is a layer formed using, for example, a vinyl chloride resin composition or an acrylic resin composition, and is transparent.
The surface protective layer may be formed using a commercially available vinyl chloride resin film or acrylic resin film.

As a surface protection layer formed using the said vinyl chloride type-resin composition, the layer which consists of a vinyl chloride type-resin composition which mix | blended the plasticizer and the stabilizer with vinyl chloride type resin, for example is mentioned.
Here, the average degree of polymerization of the vinyl chloride resin is preferably 700 to 1,500.
Moreover, as said plasticizer, plasticizers with an average molecular weight of 350-3000, such as a diethyl hexyl phthalate (DOP), are preferable.
Furthermore, as for the compounding quantity of the said plasticizer, 5-30 weight part is preferable with respect to 100 weight part of vinyl chloride-type resin.

Examples of the surface protective layer formed using the above-mentioned acrylic resin composition include those formed using acrilite, acriprene (both manufactured by Mitsubishi Rayon Co., Ltd.), Sundurene (manufactured by Kaneka Co., Ltd.), and the like.
The surface protective layer 15 is preferably a layer formed using an acrylic resin composition from the viewpoint of excellent transparency.
The thickness of the surface protective layer is usually about 40 to 200 μm.

The adhesive layer for laminating the surface protective layer to the printing layer or the like is a layer formed using, for example, an acrylic adhesive, a rubber adhesive, or a polyester adhesive, and is transparent.
Examples of the acrylic adhesive include those containing a C1 / C4 acrylic ester copolymer, a C4 acrylic ester copolymer, a C8 acrylic ester copolymer and the like as the composition of the acrylic component, The combination of the composition of the acrylic component and the curing agent may be appropriately selected in accordance with the application such as tackiness and heat resistance.

  When the above-mentioned decoration film is provided with a surface protection layer, the above-mentioned surface protection layer does not necessarily need to be laminated via an adhesive layer, and it is directly laminated on the 1st substrate film in which the printing layer was formed Also good.

The decorative film 10 can be produced by the following method.
First, a first vinyl chloride resin composition is prepared, and then the obtained first vinyl chloride resin composition is formed into a film to prepare a first base film.
The first vinyl chloride resin composition can be prepared by melt-kneading a predetermined amount of each component using a continuous kneader, a Banbury mixer, a kneader, an extruder or the like.
The film formation can be performed by calendar molding, extrusion molding, injection molding or the like.
The film formation is preferably performed by calendering. Calender molding can easily make the thickness of the base film uniform, and can form a film regardless of the composition of the vinyl chloride resin composition, and even to form a base of various sizes such as larger sizes. This is because it is suitable, and in addition, it is easy to handle small lots.
As a calender type used for the above-mentioned calendering, for example, inverted L type, Z type, upright two type, L type, inclined three type and the like can be mentioned.
Moreover, although the roll temperature at the time of calender molding may be suitably selected according to the composition of the 1st vinyl chloride resin composition, it is 140-190 degreeC normally, Preferably it is 160-180 degreeC.

Next, an adhesive layer is formed on one side of the first base film.
When the adhesive layer is made of a hot melt adhesive, the adhesive layer may be formed by a conventionally known method, and is directly applied to the first base film by using a hot melt applicator or the like. Alternatively, it may be transferred after being once applied to a separately prepared support, and then transferred. Moreover, if a separator is used as the said support body, a separator can also be laminated | stacked simultaneously with formation of a hot-melt-adhesive layer.

Furthermore, if necessary, a printing layer is formed on the side opposite to the side on which the adhesive layer of the first base film is formed. The printing layer is formed using a solvent-based ink or the like as described above.
The method of forming the print layer is as described above.
The order of the formation of the adhesive layer and the formation of the printing layer may be reversed.

Furthermore, if necessary, a surface protective layer is laminated on the first base film or the printing layer.
For example, after a transparent film to be a surface protective layer is produced by calendar molding or the like, an adhesive is applied to one side of this transparent film, and this is adhered to the surface of the first base film on which the printing layer is formed. The surface protective layer is laminated via the agent layer.
For example, after producing the above-mentioned transparent film, this transparent film may be directly stuck on the above-mentioned printing layer by a heat laminating method, and a surface protection layer may be laminated.
Although these methods can be suitably used even if it is any method, when the said printing layer is not formed, or when the design of the said printing layer is a pattern handle or a solid printing handle, When the design of the print layer is a logo or a photographic image, a method of laminating a surface protective layer through an adhesive layer is preferable. In the case of laminating by a thermal lamination method, the first base film may be stretched during the thermal lamination, which may cause distortion in the design of the print layer.
The decorative film 10 can be manufactured by passing through such a process.

<Application film>
The second base film 21 constituting the application film 20 is made of a resin composition. Here, as the resin composition, a vinyl chloride resin composition (second vinyl chloride resin composition) is preferable.

Examples of the second vinyl chloride resin composition include the same as the first vinyl chloride resin composition.
When the first base film and the second base film are made of the same kind of vinyl chloride resin composition, it starts to soften at the same temperature during heating.
In addition, when each of a 1st base film and a 2nd base film consists of a vinyl chloride-type resin composition mentioned above, both may consist of the same vinyl chloride-type resin composition completely. And different vinyl chloride resin compositions may be used.

The second vinyl chloride resin composition preferably contains a vinyl chloride resin having an average polymerization degree of 700 to 1,500 and a plasticizer having a molecular weight (or number average molecular weight) of 350 to 3,000.
Since the application film is used by being attached to the decorative film, the behavior of the second base film and the decorative film at the time of heating (for example, the behavior of drawdown of each film at the time of heat melting, etc.) Are preferred.
In the second vinyl chloride resin composition, the average polymerization degree of the vinyl chloride resin and the molecular weight of the plasticizer are the same as the average polymerization degree and plasticity of the vinyl chloride resin contained in the first vinyl chloride resin composition. More preferably, it is identical to each of the molecular weight of the agent.

In the second vinyl chloride resin composition, the blending amount of the plasticizer is preferably 15 to 30 parts by weight with respect to 100 parts by weight of the vinyl chloride resin.
When the blending amount of the plasticizer is less than 15 parts by weight, the application film (second base film) does not follow the drawdown of the decorative film (first base film) at the time of heating, and hence the core It may cause wrinkles in the decorative film attached to the material. On the other hand, if it exceeds 30 parts by weight, the application film is drawn down earlier than the decorative film at the time of heating, and the decorative film may follow the application film to deteriorate the dimensional accuracy at the time of decoration .

The thickness of the second base film is preferably 40 to 300 μm.
If the thickness of the second base film is less than 40 μm, the application film can not maintain its strength at the time of heating, and it becomes easy to draw down. As a result, the dimensional accuracy of the decorative film at the time of heat melting may deteriorate, and the sticking position accuracy after molding may also decrease.
On the other hand, if it exceeds 300 μm, the heat is hardly transmitted to the decorative film, which may adversely affect the adhesion to the core after molding. Moreover, the moldability of the edge part of a decorating film may worsen.
A more preferable thickness of the second base film is 80 to 150 μm.

The pressure-sensitive adhesive layer 22 is formed, for example, using an acrylic pressure-sensitive adhesive containing an acrylic polymer.
Examples of the acrylic polymer include homopolymers of (meth) acrylic acid alkyl esters or copolymers thereof, and (meth) acrylic acid alkyl esters and copolymerizable monomers. Among these, copolymers of (meth) acrylic acid alkyl esters are preferred.

  Specific examples of the acrylic polymer include a copolymer of 2-ethylhexyl acrylate and acrylic acid, a copolymer of 2-ethylhexyl acrylate and hydroxyethyl acrylate, and 2-ethylhexyl acrylate and methyl methacrylate. Copolymer, copolymer of 2-ethylhexyl acrylate, 2-methoxyethyl acrylate and vinyl acetate, copolymer of 2-ethylhexyl acrylate and vinyl pyrrolidone, 2-ethylhexyl acrylate, methyl methacrylate and 2-methoxyethyl The copolymer which consists of acrylates, the copolymer which consists of 2-ethylhexyl acrylate, vinyl pyrrolidone, and acrylic acid etc. are mentioned. These may be used alone or in combination of two or more.

The pressure-sensitive adhesive layer 22 may further contain a curing agent, a tackifier, a known additive, and the like.
Examples of the curing agent include isocyanate curing agents, epoxy curing agents and the like.

The thickness of the pressure-sensitive adhesive layer 22 is preferably 10 to 40 μm.
When the thickness of the pressure-sensitive adhesive layer is less than 10 μm, sufficient adhesion to the decorative film may not be secured. On the other hand, when it exceeds 40 μm, the cohesion of the pressure-sensitive adhesive decreases and When the application film is peeled off after the laminate of the decorative film and the application film is attached to the core material, adhesive residue may occur on the decorative surface.

The application film 20 can be produced by the following method.
First, a second base film is produced.
The second base film can be produced by the same method as the production of the first base film, and after preparing the second vinyl chloride resin composition, the second base film can be formed into a film by calendar molding or the like. Just do it.

Next, an adhesive layer is formed on one side of the second base film.
In the formation of the pressure-sensitive adhesive layer, for example, a pressure-sensitive adhesive layer consisting of a solvent-type or emulsion-type pressure-sensitive adhesive is formed in advance on one surface of a support, and a second base film is laminated on the pressure-sensitive adhesive layer. It can be carried out by the so-called transfer method of transferring the pressure-sensitive adhesive layer to the second base film.
The application film 20 can be manufactured through such a process.

The adhesion of the application film 20 to the decorative film 10 is preferably 1.0 to 20 (N / 25 mm).
If the adhesive strength is less than 1.0 N / 25 mm, the decorative film can not be held continuously in a series of steps of attaching the decorative film to the core material, or wrinkles appear on the surface of the attached decorative film It may occur. On the other hand, if it exceeds 20 N / 25 mm, after pasting to the core material is completed, when peeling the application film from the decorative film, it can not be peeled smoothly, and the surface of the decorative film (for example, print layer) is broken After peeling off the application film, adhesive residue may occur on the surface of the decorative film, or peeling marks may occur.

The adhesion of the application film to the decorative film is measured by a method in accordance with JIS Z0237.
Here, as a test plate (adherend), what laminated the decoration film on the aluminum plate is used. At this time, the width of the application film is 25 mm, the peeling distance is 50 mm, and the peeling speed is 300 mm / min.

<Core material>
The core material is not particularly limited as long as it is generally used for a decorative molded product, and for example, a core material made of resin, metal or ceramic can be used.
Further, the shape of the core material is also not particularly limited.

  It does not specifically limit as a material of the core material (resin core material) which consists of said resin, For example, polyethylene resin, polypropylene resin, polystyrene resin, polyethylene terephthalate resin, polyvinyl alcohol resin, vinyl chloride resin, polyamide Examples of such resins include system resins, polyacetal resins, polycarbonate resins, acrylonitrile / butadiene / styrene (ABS) resins, ionomer resins, and resin compositions in which various additives such as inorganic fibers are added to these resins.

  It does not specifically limit as a material of the core material (metal core material) which consists of said metal, For example, iron, aluminum, copper, SUS etc. are mentioned.

Next, each process performed by the manufacturing method of the decorative molded product of this invention is demonstrated.
In the manufacturing method of the said decorating molded article, the process of following (A)-(E) is performed.
(A) A step of forming a cut line penetrating the decorative film in the thickness direction at the boundary between the decorative area and the non-decorating area of the decorative film.
(B) A step of laminating an application film on the decorative film.
(C) A step of attaching the decorative film on which the application film is laminated to a core material.
(D) A step of peeling the application film from the decorative film attached to the core material.
(E) The process of removing the said non-decoration area | region of the said decoration film.

  In the production method of the present invention, the steps (A) to (E) are not necessarily performed in this order, and in the production method of the present invention, the steps are selected from among several appropriate steps. Is preferred.

First Embodiment
FIG. 2: is process drawing for demonstrating an example of the order of each process in the manufacturing method of the decorative molded product of this invention.
In the present embodiment, as shown in FIG.
(1) First, the cut line 15 which penetrates the above-mentioned decoration film in the thickness direction is formed in the boundary between the decoration field 10a of decoration film, and the non- decoration field 10b (process (A)).
In the present invention, the decoration area of the decoration film means a portion which is actually attached to the surface of the core material when the core material is decorated and remains on the surface of the decorative formed product. In addition, the non-decorated area of the decorative film is a portion which becomes unnecessary when the core material provided around the above-mentioned decorative area is decorated, and is removed in the trimming process in the conventional decorative film Part of the

Although the formation of the cut line may be performed manually, for example, using an apparatus such as an ink jet printer equipped with a cut function is preferable in terms of productivity and accuracy.
Moreover, when providing a separator in a decoration film, you may form a cut line also in a separator, and you may form a cut line only in parts other than a separator, but before performing a following process (B) Preferably, the cut line is formed only on the portion other than the separator so that the decorated area and the non-decorated area do not fall apart.

(2) Next, the application film 20 is laminated on the decorative film 10 (step (B)).
Bonding of the application film and the decorative film may be performed by a conventionally known method.
At this time, in order to bond the both at an accurate position, a mark for alignment is provided on each of the above-mentioned decoration film and the above-mentioned application film, and the above-mentioned application film is decorated based on those marks Laminate to film.

(3) Next, the non-decorated area 10b of the decorative film 10 is removed from the laminate of the decorative film 10 and the application film 20 (step (E)). At this time, if the decorative film 10 includes a separator, the separator is also removed.
Thereby, only the decoration area 10a of the decoration film 10 will remain on the lower surface of the application film 20, and this laminate will be a film used when decorating the core material using a forming apparatus.

(4) Next, the laminate of the application film 20 and the decoration area 10a of the decoration film 10 produced in the process of (3) is attached to the core material (step (C)).
In this process, the decorative film is attached to the surface of the core material by vacuum forming or vacuum / pressure forming.

Hereinafter, the method of affixing a decorative film (a laminate of a decorative film and an application film) on the surface of a core material will be described by taking vacuum / pressure forming as an example.
(A)-(f) shown to FIG. 3A and FIG. 3B are schematic diagrams for demonstrating the method to affix the laminated body of a decoration film and an application film on the surface at a core material.

  The vacuum / pressure forming apparatus 30 shown in FIGS. 3A and 3B has upper and lower forming chambers (upper forming chamber 32 and lower forming chamber 33), and the surface of the core material 31 by vacuum / pressure forming in these forming chambers. The laminated body 100 of the decoration film 10 (decoration area | region 10a) and the application film 20 is affixed on these.

First, with the upper molding chamber 32 raised (not shown), the core 31 is set on the table 35 in the lower molding chamber 33, and the laminate 100 to be attached to the core 31 is set on the upper surface of the lower molding chamber 33 Do. Thereafter, the upper molding chamber 32 is lowered by the driving device 34 to make the upper and lower molding chambers airtight (see FIG. 3A (a)).
At this time, the laminated body 100 needs to be accurately aligned with the core member 31 and set. This alignment can use, for example, positioning marks provided on the application film.

Next, the upper and lower molding chambers are vacuum-suctioned from the vacuum tank 37 through the piping 38, respectively, to be in a vacuum state (a state of extremely low pressure) (see FIG. 3A (b)).
Thereafter, the heater 36 is turned on to heat the laminate 100 (see FIG. 3A (c)). Thereby, the laminated body 100 is softened, and it becomes possible to attach the core material 31 along the surface shape.

Next, the table 35 in the lower molding chamber 33 is raised by the drive device 34, and the core material 31 is brought into contact with the softened laminate 100 (see FIG. 3B (d)).
Subsequently, the vacuum on the upper molding chamber 32 side is released to the atmospheric pressure state (the lower molding chamber 33 is in a vacuum state), and further, compressed air is introduced from the compressed air tank 39 into the upper molding chamber 32 to obtain the laminate 100. Is pressed onto the core material 31 and attached along the shape (see FIG. 3B (e)). As a result, the decorative film 10 is attached only to a predetermined position on the surface of the core material 31.

Thereafter, the insides of the upper molding chamber 32 and the lower molding chamber 33 are returned to atmospheric pressure, the upper molding chamber 32 is raised, and the core material 31 covered with the laminate 100 is taken out (see FIG. 3B (f)).
By using such a method, it is possible to obtain a core material to which a laminate of an application film and a decoration area of a decoration film is attached.

(5) Next, the application film is peeled off from the decorative film attached to the core material (step (D)).
According to the manufacturing method of the present invention, a decorative molded product can be manufactured without performing the trimming process by passing through such a process.

Second Embodiment
FIG. 4: is process drawing for demonstrating another example of the order of each process in the manufacturing method of the decorative molded product of this invention.
In the present embodiment, as shown in FIG.
(1) First, the steps (A) and (B) are performed, and the application film 20 is laminated on the decorative film 10 in which the cut line 15 is formed at the boundary between the decorative area 10a and the non-decoration area 10b. Make a body.
Specifically, the laminate may be produced in the same manner as (1) and (2) of the first embodiment.

(2) Next, the laminated body of the decoration film 10 and the application film 20 is stuck on a core material (process (C)).
In this process, the decorative film is attached to the surface of the core material by vacuum forming or vacuum / pressure forming. The specific forming method is as described above with reference to FIGS. 3A and 3B.
In the present embodiment, unlike the first embodiment, both of the decoration area 10a and the non-decoration area 10b of the decoration film 10 are bonded to the surface of the core material 31 in a state of being bonded to the application film 20. Do it.

(3) Next, the application film 20 is peeled off from the decorative film 10 attached to the core material 31 (step (D)). At this time, the non-decorated area 10b of the decorative film 10 is removed along with the peeling of the application film 20 (step (E)).
That is, in the present embodiment, when the application film 20 is peeled off, the core material to which the decorative film 10 is adhered together with the application film 20 while the non-decorated area 10 b of the decorative film 10 adheres to the application film 20 Removed from 31
According to the manufacturing method of the present invention, the decorative molded product can be manufactured without performing the trimming step also through such steps.

(Other embodiments)
The order of the steps (A) to (E) in the manufacturing method of the present invention is not limited to the order of steps of the first embodiment and the second embodiment.
For example, in the first embodiment and the second embodiment, after performing the step (A) of forming a cut line at the boundary between the decorated area and the non-decorated area of the decorated film, the application film is laminated on the decorated film Although the step (B) was performed, in the embodiment according to the method for producing a decorated formed article of the present invention, the order of performing the steps (A) and (B) may be reversed.
That is, after performing the process (B) which laminates an application film on a decoration film, you may perform the process (A) of forming a cut line in the boundary of the decoration area of a decoration film, and a non decoration area. Also in this case, the specific method is as described above.

It is preferable to perform the process of following (F), before performing the process of said (A)-(E) in the manufacturing method of the decorating molded article of this invention.
(F) A step of determining the boundary between the above-mentioned decorated area and the above-mentioned non-decorated area.
As one of the features of the method for producing a decorative formed product using vacuum forming or vacuum pressure air forming, the shape of the surface of the core material to be decorated (the surface to be decorated with the core material) is a curved surface or Even if it is a three-dimensional shape which has an unevenness | corrugation, a decorative surface may be able to be formed beautifully in a short time.
On the other hand, in the manufacturing method of the above-mentioned decorated molded product, since the decoration is performed by attaching the resin film softened by heating to the core material, the above resin film is attached to the core material before heating. It is common to deform (extend) from the state of.

The manufacturing method of the decoration film of the present invention is a method of sticking a decoration film on a predetermined position of a core material, and manufacturing a decoration forming article, without performing a trimming process. Therefore, in the production method of the present invention, in order to affix the decorative film to the predetermined position only on the surface of the core material correctly, when the decorative film is pasted to the core material, how the decorative film is deformed It is preferable to grasp information in advance and to determine the boundary between the above-mentioned decoration area and the above-mentioned decoration area based on this information, that is, the formation position of the cut line.
Therefore, in the manufacturing method of the present invention, it is preferable to carry out the step (F).

The said process (F) can be performed, for example by passing through the following process ((f1)-(f4)). That is,
(F1) First, a decorative film having a grid-like (square-like) or other pattern printing layer formed on the surface is prepared, and the application film is laminated on the decorative film to produce a laminate.
At this time, the size of the lattice (square) in the above-mentioned pattern may be, for example, about 1 to 10 mm, for example, in both vertical and horizontal directions.

(F2) Next, the laminated body produced at the said process (f1) is stuck on a core material by vacuum forming or vacuum pressure forming. Here, the methods of vacuum forming and vacuum pressure forming are as described above. Also in this process, the attachment of the laminate to the forming apparatus is performed based on the application film.

(F3) Next, the core material to which the laminate is attached is taken out from the forming apparatus, and the application film is subsequently peeled off from the decorative film. Then, the position which should trim is determined about the decoration film stuck on the to-be-decided surface of a core material. At this time, trimming may be actually performed.
The determination of the position where the trimming should be performed may be performed before peeling the application film.

(F4) Finally, based on the design of the decorative film attached to the surface to be decorated of the core material and the position to perform the trimming, among the decorative films prepared in the step (f1), actually Identify the part (decorated area) to be used for decorating the core material.
In this method, since a grid pattern is drawn on the surface of the first base film as the printing layer, the decorative film pattern (grid pattern) of the decorative film attached to the core material is used as a reference. Among them, it is possible to identify a portion that is actually used to decorate the core material, and the outer edge of the portion that is actually used to decorate the core material is the boundary between the decorated region and the non-decorated region It becomes.
By passing through such a process, the boundary between the above-mentioned decoration area and the above-mentioned non-decoration area can be determined.

  And if the boundary between the above-mentioned decoration area and the above-mentioned non-decoration area is decided once, when decorating the same core material with the same decoration film and decoration conditions, the above-mentioned decoration area and By forming the above-mentioned cut line in the boundary with the above-mentioned undecorated area, a decorated molded article can be manufactured without performing a trimming process with a manufacturing method of a decorated molded article of the present invention.

Moreover, the specific method of the process (F) of determining the boundary of the said decoration area | region and the said non-decoration area | region is not limited to the method mentioned above, If it is a method which can determine the said boundary, others The method of
For example, after the design of the print layer of the decorative film is photographed with a camera before and after molding, the amount of deformation due to sticking to the core material of the decorative film is calculated by image analysis software based on the images before and after molding The boundary between the above-mentioned decoration area and the above-mentioned non-decoration area may be determined based on the analysis result.

As described above, according to the method of manufacturing a decorated formed product of the present invention, a decorated formed product in which a decorated film is attached to the surface of a core material can be manufactured without performing a trimming process.
Further, in the method of manufacturing the decorated molded product, the decorated area and the non-decorated area of the decorated film are cut before being attached to the core material, so the above-mentioned decorating can be performed by heat treatment during molding. The end faces of the area soften and smooth. Therefore, the manufactured decorative molded product is a decorative molded product in which the end face of the decorative film is smooth, and there are few sticking and level differences.
A decorated molded article produced by using the method of producing a decorated molded article of the present invention is also one of the present invention.

  Specific examples of the above-mentioned decorative molded product are not particularly limited, and electric appliances such as covers for mobile phones and smartphones, tablets, interior products for vehicles, bike cowlings, etc. designs such as patterns, designs and characters on their surfaces And various decorative molded articles decorated with

  Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples.

<Production of Decorative Film>
(Production Example 1: Production of Decorative Film A)
(1) To 100 parts by weight of a vinyl chloride resin (manufactured by Kaneka Corp., Kanevinyl S 1008: average polymerization degree 800), 23 parts by weight of a plasticizer (manufactured by J Plus Co., DOP) is blended and melt-kneaded using a Banbury mixer The first vinyl chloride resin composition was prepared. Then, the 80-micrometer-thick vinyl chloride resin film (1st base film) was formed into a film through each roll (roll temperature, 160-180 degreeC) of a reverse L type calender apparatus.

(2) Next, a hot melt adhesive (Hibon 7603, manufactured by Hitachi Chemical Polymer Co., Ltd.) is dried and coated on the separator to a thickness of 40 μm, and this is transferred to the first base film, It was set as the laminated body on which the base film of 1, the adhesive bond layer, and the separator were laminated | stacked in this order.

(3) Next, a printing layer was formed on the surface of the first base film (the surface opposite to the side on which the adhesive layer was formed) using the following method.
An inkjet printer made by Mimaki Engineering, CJV30-60 is used as a printing apparatus, and inkjet printing is performed on the surface of a vinyl chloride resin film using ES3 ink made by Mimaki Engineering as a solvent-based ink, and a grid pattern of 5 mm grid spacing is printed. A layer was formed.
The decorative film A was produced through the process of said (1)-(3).

(Production Example 2: Production of Decorative Film B)
A decorative film B was produced in the same manner as in Production Example 1 except that the printing layer was not formed on the surface of the first base film.

(Production Example 3: Production of Decorative Film C)
On the printing layer of the decorative film A prepared in Preparation Example 1, a vinyl chloride resin film having a thickness of 80 μm prepared by the following method was dried to a thickness of 20 μm of an adhesive layer (manufactured by Soken Chemical Co., Ltd. By laminating via SK dyne 1506), the decorating film C in which the surface protective layer was formed was produced.
The vinyl chloride resin film is prepared by blending 15 parts by weight of a plasticizer (DOP, manufactured by J Plus) with 100 parts by weight of a vinyl chloride resin (manufactured by Kaneka, Kanevinyl S 1008), and melt-kneaded with a Banbury mixer After preparing a vinyl chloride resin composition, the obtained vinyl chloride resin composition was produced through each roll (roll temperature, 160 to 180 ° C.) of a reverse L-type calendar device.

<Production of application film>
(Preparation Example 4: Preparation of Application Film A)
(1) To 100 parts by weight of a vinyl chloride resin (manufactured by Kaneka Corp., Kanevinyl S 1008: average polymerization degree 800), 20 parts by weight of a plasticizer (manufactured by J Plus Co., DOP) is blended and melt-kneaded using a Banbury mixer The second vinyl chloride resin composition was prepared. Thereafter, a vinyl chloride resin film (second base film) having a thickness of 100 μm was formed through each roll (roll temperature, 160 to 180 ° C.) of the reverse L-type calendar device.

(2) Next, 100 parts by weight of an acrylic pressure-sensitive adhesive (manufactured by Soken Chemical Co., Ltd., SK dyne 1495) and 1.5 parts by weight of a curing agent (manufactured by Soken Chemical Co., Ltd., L-45) are mixed to obtain an adhesive composition. After adjusting and coating this on a separator so that it has a thickness of 20 μm after drying, it is transferred to the second base film, and a second base film, an adhesive layer and a separator are laminated in this order It was a body.
An application film A was produced through the steps (1) and (2).

(Preparation Example 5: Preparation of Application Film B)
As a pressure-sensitive adhesive composition, use is made of a pressure-sensitive adhesive composition in which 1.0 part by weight of a curing agent (manufactured by Soken Chemical Co., Ltd., L-45) is mixed with 100 parts by weight of an acrylic pressure-sensitive adhesive An application film B was produced in the same manner as in Production Example 4 except for the above.

(Production Example 6: Production of Application Film C)
As a pressure-sensitive adhesive composition, a pressure-sensitive adhesive composition in which 1.0 part by weight of a curing agent (manufactured by Soken Chemical Co., Ltd., E-50C) is mixed with 100 parts by weight of an acrylic pressure-sensitive adhesive (manufactured by Soken Chemical Co., Ltd., SK dyne 1439U) An application film C was produced in the same manner as in Production Example 4 except for the above.

(Preparation Example 7: Preparation of Application Film D)
As a pressure-sensitive adhesive composition, a pressure-sensitive adhesive composition in which 0.5 parts by weight of a curing agent (L-45, manufactured by Soken Chemical Co., Ltd.) is mixed with 100 parts by weight of an acrylic adhesive (SK Dyne 1473, manufactured by Soken Chemical Co., Ltd.) An application film D was produced in the same manner as in Production Example 4 except for the above.

(Examples 1 to 6 and Comparative Example 1)
Here, using the decorative film and the application film produced in the above-described production example, a decorative molded article 130 (see FIG. 5) having a smartphone cover as a core material was produced.
As shown in FIG. 5, the decorative molded product 130 is a decorative molded product in which the upper surface 131 a and the side surface 131 b of the cover 131 for a smartphone are decorated (hatched portions are decorated in FIG. 5) It is.

(Determined at the cut line position)
As a vacuum / pressure forming machine, using a TOM forming machine (manufactured by Cloth Applying Vacuum Co., Ltd., model number: NGF-0406), at a heating temperature of 80 to 120 ° C. of the heater, a predetermined position of the core material (base material for a smartphone cover) The laminated body of the decoration film A or C in which the printing layer of lattice pattern was formed, and the application film A was affixed on (refer FIG. 5).
Next, the core with the decorative film attached was taken out from the vacuum / pressure forming machine, and the application film was peeled off. At this time, the decorative film is attached to the entire side surface of the core material (the base material of the cover for a smartphone).
Next, in the decorative film attached to the side surface of the core material, a boundary line is provided at the boundary between the necessary part (the decorated area (hatched part in FIG. 5)) and the unnecessary part (the non-decorated part) I pulled it.
And this boundary line was determined as a boundary (cut line position) of the decoration field of a decoration film, and a non decoration field.

Example 1
(1) First, a blade (part number: SPB-0030-1) was attached to an inkjet printer (CJV30-60) manufactured by Mimaki Engineering, and cut lines were formed on the decorative film B produced by the method described above using this . At this time, as the formation position of the cut line, the formation position of the cut line determined using the above-described decorative film A was adopted.
Next, the application film A in which the separator is peeled is laminated on the decorative film B in which the cut line is formed, and subsequently, the separator of the decorative film B is peeled and the non-decorated area of the decorative film B is removed Then, a laminate was produced.

(2) Next, using a TOM forming machine (manufactured by FUJITSU Vacuum Co., Ltd., model number: NGF-0406), the predetermined heating surface temperature of the heater is 80 to 120 ° C. The laminated body produced by said (1) was affixed on the position. At this time, alignment was performed on the basis of the mark previously provided on the application film.

(3) Next, the core material to which the laminate (the decorative film and the application film) was attached was taken out from the molding machine, and then only the application film was peeled off to complete the decorative molded product.

(Example 2)
(1) The cut line was formed in the decoration film C using the method similar to an Example. At this time, as the formation position of the cut line, the formation position of the cut line determined using the above-described decorative film C was adopted.
Next, the application film A was laminated on the decorative film C in which the cut line was formed, and a laminate was produced.

(2) Thereafter, a decorated molded product was produced in the same manner as in Example 1 except that the laminate produced in (1) above was used as a laminate.

(Example 3)
A decorated molded product was produced in the same manner as in Example 1 except that the application film B was used in place of the application film A as the application film.

(Example 4)
(1) In the same manner as in Example 1, a cut line was formed on the decorative film B.
Next, the application film A in which the separator was peeled off was laminated on the decorative film B in which the cut line was formed, and subsequently, only the separator on the decorative film B was peeled off to produce a laminate.
Therefore, here, the non-decorated area of the decorative film B is in a state of being stuck to the application film A.

(2) Next, using a TOM forming machine (manufactured by FUJITSU Vacuum Co., Ltd., model number: NGF-0406), the predetermined heating surface temperature of the heater is 80 to 120 ° C. The laminated body produced by said (1) was affixed on the position. At this time, alignment was performed on the basis of the mark previously provided on the application film.

(3) Next, the core material to which the laminate (the decorative film and the application film) is attached is taken out from the molding machine, and subsequently, the application film is peeled off and the non-decorated area of the decorative film is removed. As a result, a decorated molded product was completed.

(Example 5)
A decorated molded product was produced in the same manner as in Example 1 except that the application film C was used instead of the application film A as the application film.

(Example 6)
A decorated molded product was produced in the same manner as in Example 1 except that the application film D was used in place of the application film A as the application film.

(Comparative example 1)
(1) First, the application film A in which the separator was peeled off was laminated on the decorative film B, and then the separator on the decorative film B was peeled off to prepare a laminate.
In the present comparative example, no cut line is formed on the decorative film.

(2) Next, using a TOM forming machine (manufactured by FUJITSU Vacuum Co., Ltd., model number: NGF-0406), the predetermined heating surface temperature of the heater is 80 to 120 ° C. The laminated body produced by said (1) was affixed on the position. At this time, alignment was performed on the basis of the mark previously provided on the application film.

(3) Next, the core material to which the laminate (the decorative film and the application film) was attached was taken out from the molding machine. Thereafter, the application film was peeled off, and further, unnecessary portions of the decorative film were removed by trimming to complete a decorative molded product.
In the present comparative example, the laminated body was attached in a state where the core material was fitted in the receiving jig for trimming, and after peeling of the application film, trimming was performed using a cutter.

(Evaluation)
The following evaluation was performed about the decorating molded article produced by the Example and the comparative example. The results are shown in Table 1.

(Adhesive force of application film)
After producing a laminate of the decorative film and the application film, the adhesion (N / 25 mm) of the application film to the decorative film was measured. The method of measuring the adhesion is as described above.

(Shape of end of decorative film)
The shape of the end of the decorative film (the outer edge of the decorative film present on the side surface of the core material) was observed with a microscope, magnified 100 times and observed, and the shape was evaluated according to the following criteria.
A: It was smooth.
B: The cross section was sharp.

(Tackiness of the end of the decoration film)
The end of the decorative film (the outer edge of the decorative film present on the side surface of the core material) was traced with a finger, and it was confirmed by touch whether or not the end of the decorative film was caught.

(Peelability of application film)
The laminate was attached to the core material and taken out from the molding machine, and the peelability at the time of peeling the application film was evaluated based on the following criteria.
○: There was no adhesive residue on the decorative film side, and the application film could be peeled off smoothly.
Δ: Although it was heavy peeling, it could be peeled without adhesive residue on the decorative film side.
X: After peeling, adhesive residue was generated on the decorative film side, or it was difficult to peel off by hand.

(Appearance of decorated molded products)
The appearance of the manufactured decorative molded product (presence or absence of generation of wrinkles and mold on the upper surface 131a of the smartphone cover) was visually observed and evaluated according to the following criteria. In addition, in this evaluation, when affixing a laminated body to a core material, a "wrinkling" means what arose on a decoration film, and the "mold | type" is the peeling which arose on the decoration film by peeling of an application film. I say a trace.
○: Wrinkles and type are not observed together.
Δ: Inconspicuous small wrinkles or molds are observed.
X: Wrinkles or types that are noticeable at first glance are observed.

DESCRIPTION OF SYMBOLS 10 decoration film 10a decoration area 10b non-decoration area 11 1st base film 12 adhesive layer 13 printing layer 14 separator 20 application film 21 2nd base film 22 adhesive layer 30 molding apparatus 31 core material 32 upper molding Chamber 33 Lower molding chamber 34 Drive unit 35 Table 36 Heater 37 Vacuum tank 38 Piping 39 Pressure air tank 100 Laminated body

Claims (5)

A method for producing a decorated formed product, comprising attaching a decorated film to the surface of a core material by vacuum forming or vacuum pressure forming,
The decorative film comprises a decorative area to be attached to the core and a non-decorative area provided around the decorative area.
A method for producing a decorated formed product, comprising performing the following steps (A) to (E).
(A) A step of forming a cut line which penetrates the decorative film in the thickness direction at the boundary between the decorative area and the non-decorating area of the decorative film .
(B) A step of laminating an application film on the decorative film .
(C) A step of attaching the decorative film on which the application film is laminated to a core material by vacuum forming or vacuum pressure forming .
(D) A step of peeling the application film from the decorative film attached to the core material .
(E) The process of removing the said non-decoration area | region of the said decoration film . The method for producing a decorated formed article according to claim 1, wherein the following step (F) is performed before the steps (A) to (E) are performed.
(F) A step of determining a boundary between the decorated area and the non-decorated area.   The method for producing a decorative formed article according to claim 1 or 2, wherein the adhesive strength of the application film to the decorative film is 1.0 to 20 N / 25 mm. The decorative film includes a base film and an adhesive layer,
The method according to any one of claims 1 to 3, wherein the base film comprises a vinyl chloride resin composition. The application film includes a base film and an adhesive layer,
The method for producing a decorated formed article according to any one of claims 1 to 4, wherein the base film is made of a vinyl chloride resin composition.