JP2002049315A - Marking film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a marking film which has excellent weatherability for a long period of time, has adequate pliability and shape follow-up characteristic, and is therefore excellent in cubic surface formability and workability. SOLUTION: This marking film is laminated with a UV shieldable film layer, adhesive layer, colored base material layer, tacky adhesive layer and release material layer in this order and is characterized in that that the 2% module defined in the text is 5.88 to 19.60 N/15 mm. The 2% modulus of the UV shieldable film layer is 3.92 to 14.70 N/15 mm and/or the thickness thereof is 10 to 50 μm. The 2% modulus of the colored base material layer is 2.94 to 14.70 N/15 mm and/or the thickness thereof is 30 to 100 μm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marking film suitable as an advertisement sticker, a decoration sticker, a display sticker, and the like. The marking film according to the present invention includes a marking sheet.

[0002]

2. Description of the Related Art In general, a marking film is made of a vinyl chloride resin film as a base material layer. The base material layer is kneaded with a pigment according to the application and purpose, and is colored, printed or painted. A suitable adhesive (pressure-sensitive adhesive) or a heat-sensitive adhesive is applied to one side of the base material layer according to the application or purpose to form a pressure-sensitive adhesive layer, and if necessary, a pressure-sensitive adhesive A layer of release material such as release paper or a release film is laminated for the purpose of protecting the layer. In use, the release material layer is peeled off and the exposed adhesive layer is applied to the adherend. It is used by the method of sticking to the place.

[0003] This marking film is often used outdoors, for example, for signs, billboards, shutters,
Advertising stickers used for shop windows, etc .;
Widely used for outdoor applications such as decorative stripe stickers used for vehicles such as automobiles and motorcycles and ships such as motor boats; and display stickers used for traffic signs, road signs, and information boards. For this reason, the marking film is required to have excellent weather resistance, and also have appropriate flexibility and shape followability for attaching to a cubic curved surface.

Since conventional marking films are often used outdoors, light stabilizers and ultraviolet absorbers are added to ensure weather resistance. However, in order to secure weather resistance over a long period of time, A method of coating (coating) an ultraviolet shielding material on the surface of a marking film, a method of laminating (laminating) an ultraviolet shielding film, or a method of applying an ultraviolet shielding film to the surface of a marking film after applying the marking film. Are being considered and implemented.

However, the method of applying an ultraviolet shielding material on the surface of a marking film requires a sufficiently thick coating of the ultraviolet shielding material in order to obtain a desired effect of improving weather resistance. And it is difficult to design for ensuring adhesion to the base material layer constituting the marking film.

In the method of laminating the ultraviolet shielding film on the surface of the marking film, the lamination of the ultraviolet shielding film increases the thickness of the entire marking film. There is a problem that is lost. Further, the method of attaching the ultraviolet shielding film to the surface of the marking film after the application thereof has a problem that it takes twice as much labor for the application.

[0007] As an example of the marking film, for example, in Japanese Patent Application Laid-Open No. 10-71681, "A film made of a soft vinyl chloride resin composition containing an ultraviolet absorber or a hindered amine compound is used as a base layer, No. 4, pp. 7-28, 1989, discloses a decorative coating film (marking film) in which a hot melt adhesive layer made of an ethylene-vinyl acetate copolymer is formed on one side.

However, the decorative coating film (marking film) disclosed in the above publication defines the vinyl acetate content of the ethylene-vinyl acetate copolymer and the melt flow rate (MFR) in specific ranges. This is intended to improve the adhesion of the hot melt adhesive to the soft vinyl chloride resin film, but does not solve the above-mentioned problems.

[0009]

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a tertiary curved surface workability and workability since it has excellent weather resistance over a long period of time and has appropriate flexibility and shape followability. Another object of the present invention is to provide an excellent marking film.

[0010]

According to the first aspect of the present invention, there is provided a marking film comprising an ultraviolet shielding film layer,
An adhesive layer, a colored base material layer, a pressure-sensitive adhesive layer, and a release material layer are laminated in this order, and a 2% modulus defined in the text is 5.88 to 19.60 N / 15 mm. I do.

The marking film according to the second aspect of the present invention is the marking film according to the first aspect, wherein the 2% modulus defined in the text of the ultraviolet shielding film layer is 3.92 to 14.70 N. / 15m
m, and a 2% modulus defined in the text of the colored base material layer is 2.94 to 14.70 N / 15 mm.

Further, in the marking film according to the third aspect of the present invention, in the marking film according to the first or second aspect, the ultraviolet shielding film layer has a thickness of 10 to 50 μm, and the colored substrate layer Has a thickness of 30 to 100 μm.

The marking film of the present invention has a 2% modulus measured by the following measuring method of from 5.88 to 19.
It is necessary to be 60 N / 15 mm, preferably 6.86 to 11.76 N / 15 mm.

[Measurement method of 2% modulus] Using a Tensilon tensile tester (trade name "UCT-500", manufactured by Orientec Co., Ltd.), cut into 15 mm width under the conditions of a chuck interval of 100 mm and a pulling speed of 200 mm / min. A tensile test was performed on the sample thus obtained, and the tensile strength at 2% elongation (N / 15
mm).

If the above-mentioned 2% modulus of the marking film is less than 5.88 N / 15 mm, the stiffness of the marking film will be insufficient, and the workability will be reduced, or the film will have insufficient strength and will tear during use. On the contrary, the 2% modulus of the marking film is 19.6
If it exceeds 0 N / 15 mm, the film strength will be too high, and the flexibility and shape following properties will be poor, or the cutting properties of the cutting machine will be reduced.

The UV-shielding film used for the UV-shielding film layer constituting the marking film of the present invention is not particularly limited, but, for example, an acrylic resin, a fluorine-based resin, A film formed by using a thermoplastic resin such as a vinyl-based resin, adding a UV absorber to the thermoplastic resin, and kneading the thermoplastic resin composition is formed. The thermoplastic resin used as the main component may be used alone or in combination of two or more. However, in order to secure excellent weather resistance over a long period of time, an acrylic resin or a fluorine resin may be used. It is preferable to use a system resin. The acrylic resin and the fluorine resin may be used alone or in combination.

The ultraviolet absorber is not particularly limited, and examples thereof include a benzophenone-based ultraviolet absorber, a benzotriazole-based ultraviolet absorber, and a cyanoacrylate-based ultraviolet absorber. Can be These ultraviolet absorbers may be used alone or in combination of two or more.

In the above-mentioned thermoplastic resin composition for obtaining an ultraviolet shielding film, other than the thermoplastic resin as the main component and the above-mentioned ultraviolet absorber, if necessary, as long as the object of the present invention is not hindered. , Inorganic or organic fillers,
One of various additives such as softener, plasticizer, surfactant, antioxidant (antiaging agent), heat stabilizer, light stabilizer, lubricant, antistatic agent, antiblocking agent, coloring agent, organic solvent, etc. Alternatively, two or more kinds may be added.

In general, a marking film is required to have multi-color compatibility. In order to achieve the multi-color compatibility, the ultraviolet shielding film layer is preferably transparent or translucent. Therefore, it is preferable that the thermoplastic resin composition does not contain an ultraviolet absorber or various additives which may inhibit the transparency of the ultraviolet shielding film.

The method of forming the ultraviolet shielding film comprising the above-mentioned thermoplastic resin composition is not particularly limited, but examples thereof include an extrusion molding method, a calendar molding method, an inflation molding method and a casting molding method. Film forming method, and any forming method may be adopted. Further, the ultraviolet shielding film thus obtained may be a single layer ultraviolet shielding film or a multilayer ultraviolet shielding film of two or more layers.

The ultraviolet shielding film layer constituting the marking film of the present invention has a thickness of 2
The% modulus is preferably from 3.92 to 14.70 N / 15 mm.

If the above-mentioned 2% modulus of the ultraviolet ray shielding film layer is less than 3.92 N / 15 mm, the obtained marking film will have insufficient rigidity and workability will be reduced.
When the film strength is insufficient, the film may be apt to tear during use. Conversely, when the above-mentioned 2% modulus of the ultraviolet shielding film layer exceeds 14.70 N / 15 mm, the film strength of the obtained marking film may be reduced. If it is too high, the flexibility and shape followability may be poor, or the cutting performance of the cutting machine may be reduced.

The method for controlling the above-mentioned 2% modulus of the ultraviolet ray shielding film layer to be in the range of 3.92 to 14.70 N / 15 mm is not particularly limited. Examples thereof include a method of adjusting the thickness, a method of appropriately setting and selecting the glass transition temperature (Tg) of the thermoplastic resin used as a main component and the composition of the thermoplastic resin composition.

The ultraviolet shielding film layer constituting the marking film of the present invention has a thickness of 10 to 50.
μm, more preferably 20 to 40 μm.
μm.

The thickness of the ultraviolet shielding film layer is 10 μm
If it is less than, the temporal deterioration of the ultraviolet shielding property is increased, and the long-term weather resistance of the obtained marking film may be insufficient.On the contrary, when the thickness of the ultraviolet shielding film exceeds 50 μm, When the above-mentioned 2% modulus of the ultraviolet ray shielding film exceeds 14.70 N / 15 mm, the flexibility and shape followability of the obtained marking film may be insufficient.

The coloring substrate used for the coloring substrate layer constituting the marking film of the present invention is not particularly limited. For example, a vinyl chloride resin, an acrylic resin, a urethane resin A film formed by using a thermoplastic resin such as a resin or an olefin-based resin, and adding a pigment or a dye as a colorant to the thermoplastic resin and kneading the thermoplastic resin composition into the mixture, is exemplified. The thermoplastic resin used as the main component may be used alone, or two or more kinds may be used in combination.

The pigment or dye used as the colorant is not particularly limited, but examples thereof include rutile titanium oxide, quinacridone, diketopyrrolopyrrole, cyanine green, and cyanine blue. These pigments and dyes may be used alone or in combination of two or more, but it is preferable to select and use pigments and dyes having excellent weather resistance.

In the above-mentioned thermoplastic resin composition for obtaining a colored base material, in addition to the thermoplastic resin as a main component and a pigment or a dye as a coloring agent, the thermoplastic resin composition is required as long as the achievement of the object of the present invention is not hindered. Accordingly, inorganic or organic fillers, softeners, plasticizers, surfactants, antioxidants (antiaging agents),
One of various additives such as a heat stabilizer, a light stabilizer, an ultraviolet absorber, a lubricant, an antistatic agent, an antiblocking agent, and an organic solvent.
Seeds or two or more kinds may be added.

The method for molding the colored substrate comprising the thermoplastic resin composition is not particularly limited,
For example, a general method of forming a film base such as an extrusion molding method, a calendar molding method, an inflation molding method, and a casting molding method may be mentioned, and any molding method may be employed. The colored substrate thus obtained is
It may be a colored substrate composed of a single layer or a colored substrate composed of two or more layers.

The colored base layer constituting the marking film of the present invention preferably has a 2% modulus of 2.94 to 14.70 N / 15 mm as measured by the above-mentioned measuring method.

The 2% modulus of the colored base material layer is 2.9.
If the thickness is less than 4 N / 15 mm, the obtained marking film may have insufficient stiffness to reduce workability, or the film strength may be insufficient to easily cause tearing during use. 13. the 2% modulus of the layer is 14.
If it exceeds 70 N / 15 mm, the film strength of the obtained marking film may be too high, resulting in poor flexibility and shape following properties, or a decrease in cutting properties by a cutting machine.

The above 2% modulus of the colored base material layer is set to 2.9.
As a method of making the range of 4 to 14.70 N / 15 mm, although not particularly limited, for example,
Examples thereof include a method of adjusting the thickness of the colored base material layer and a method of appropriately setting and selecting the glass transition temperature (Tg) of the thermoplastic resin used as a main component and the composition of the thermoplastic resin composition.

The thickness of the colored base layer constituting the marking film of the present invention is preferably 30 to 100 μm, more preferably 40 to 60 μm.

If the thickness of the colored base material layer is less than 30 μm, the obtained marking film will have insufficient rigidity, resulting in reduced workability, and insufficient film strength, which will tend to cause tearing during use. On the contrary, when the thickness of the colored base layer exceeds 100 μm, the above-mentioned 2% modulus of the colored base layer exceeds 14.70 N / 15 mm, and the flexibility and shape followability of the obtained marking film are insufficient. It may be.

In the marking film of the present invention,
The ultraviolet shielding film layer and the colored base layer are laminated via an adhesive layer.

The adhesive used for the adhesive layer may be any adhesive as long as it can suitably bond the ultraviolet shielding film layer and the colored base material layer, and is particularly limited. Although not a thing, for example, urethane adhesive, acrylic adhesive, ethylene-vinyl acetate copolymer adhesive, vinyl chloride-vinyl acetate copolymer adhesive, styrene-conjugated diene block copolymer adhesive, rubber Conventionally known various adhesives such as a system-based adhesive can be used, and are preferably used. These adhesives may be used alone or in combination of two or more.

The form of the adhesive is not particularly limited. For example, a solvent-type adhesive, an emulsion-type adhesive, a hot-melt-type adhesive, a reactive-type adhesive, a photopolymerizable monomer type or oligomer type can be used. Any form such as an adhesive, a pressure-sensitive adhesive (pressure-sensitive adhesive), and a heat-sensitive adhesive may be used.

The preferred method of bonding the ultraviolet light shielding film layer and the colored base material layer is not particularly limited. For example, a dry lamination method using a urethane-based adhesive or the like, an ultraviolet light shielding film layer, After forming a pressure-sensitive adhesive layer or a heat-sensitive adhesive layer on one of the adhesive surfaces of the colored base material layer, a method of laminating the adhesive layer on the other adhesive surface, a method of heat laminating, or the like can be used.

The pressure-sensitive adhesive used for the pressure-sensitive adhesive layer constituting the marking film of the present invention is not particularly limited. For example, an acrylic pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a polyvinyl ether-based pressure-sensitive adhesive, A silicone-based pressure-sensitive adhesive and the like can be mentioned, and among them, an acrylic-based pressure-sensitive adhesive is preferably used because of its excellent weather resistance and transparency.

The acrylic pressure-sensitive adhesive is not particularly limited, but, for example, the alkyl group has 4 to 1 carbon atoms.
2, a homopolymer of an alkyl (meth) acrylate monomer or a copolymer of alkyl (meth) acrylate monomers, or a copolymer of an alkyl (meth) acrylate monomer and a polymerizable monomer copolymerizable with the alkyl (meth) acrylate monomer. It is mainly composed of a copolymer or the like. In addition, (meth) acrylate referred to in the present invention means acrylate or methacrylate.

The alkyl (meth) acrylate monomer having 4 to 12 carbon atoms in the alkyl group is not particularly limited. For example, n-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, Examples include isooctyl (meth) acrylate, n-octyl (meth) acrylate, isononyl (meth) acrylate, and lauryl (meth) acrylate. These alkyl (meth) acrylate monomers may be used alone or in combination of two or more. However, it is necessary to adjust the adhesiveness (tack) and the balance between the adhesive strength and the cohesive strength of the obtained adhesive. In order to make the homopolymer excellent, an alkyl (meth) acrylate monomer having a glass transition temperature (Tg) of a homopolymer of -50 ° C. or less is used as a main component, and is mixed with a methyl (meth) acrylate or ethyl (meth) acrylate. It is preferable to use an alkyl (meth) acrylate monomer having 1 to 3 carbon atoms in the alkyl group.

The polymerizable monomer copolymerizable with the alkyl (meth) acrylate monomer is not particularly limited, but includes, for example, (meth) acrylic acid, maleic acid, maleic anhydride, fumaric acid, Carboxyl group-containing monomers such as itaconic acid, and 2-hydroxyethyl (meth) acrylate, 4-hydroxybutyl acrylate, polyoxyethylene (meth) acrylate, polyoxypropylene (meth) acrylate, and caprolactone-modified (meth) acrylate And a hydroxyl group-containing monomer. These polymerizable monomers may be used alone or in combination of two or more.

The form of the pressure-sensitive adhesive used in the present invention including the above-mentioned acrylic pressure-sensitive adhesive is not particularly limited.
For example, any form such as a solvent-type adhesive, an emulsion-type adhesive, a hot-melt-type adhesive, and a monomer-type or oligomer-type adhesive capable of performing bulk polymerization such as photopolymerization by irradiation with ultraviolet light may be used. The pressure-sensitive adhesive may be a cross-linking type, a non-cross-linking type, a one-part type, or a multi-part type of two or more parts.

In the above-mentioned pressure-sensitive adhesive, a tackifier, a coupling agent, an inorganic or organic filler, a softener, a plasticizer, a surface active Addition of one or more of various additives such as chemicals, antioxidants (antiaging agents), heat stabilizers, light stabilizers, ultraviolet absorbers, colorants, defoamers, antistatic agents, flame retardants, etc. It may be.

The thickness of the pressure-sensitive adhesive layer formed using the above-mentioned pressure-sensitive adhesive after drying is not particularly limited.
It is preferably from 50 μm to 50 μm. When the thickness of the pressure-sensitive adhesive layer after drying is less than 20 μm, the resulting marking film may have insufficient tackiness or tackiness, and conversely, the dried pressure-sensitive adhesive layer may have a thickness of 50 μm. If it exceeds, the pressure-sensitive adhesive layer (glue) tends to seep out from the end of the obtained marking film, and dust adheres to it, or the pressure-sensitive adhesive layer causes cohesive failure when the marking film is peeled off after use, Adhesive residue may occur on the surface of the adherend.

The release material used for the release material layer constituting the marking film of the present invention is not particularly limited, and examples thereof include a silicone resin-based release agent and a long-chain alkyl group pendant graft polymer-based release agent. A release paper or a release film obtained by subjecting at least one surface of paper or a plastic film to a release treatment with a release agent or the like may be used.

The method for producing the marking film of the present invention is not particularly limited. For example, a pressure-sensitive adhesive is applied to the release-treated surface of the release material by a predetermined method such as reverse coating or hot melt coating. After applying a coating so as to have a thickness and, if necessary, drying and cooling, etc., and forming a pressure-sensitive adhesive layer having a predetermined thickness after drying, the pressure-sensitive adhesive layer and the UV-shielding A desired marking film can be obtained by laminating the film on the other side of the colored base material layer laminated by the above-mentioned bonding method and transferring the pressure-sensitive adhesive layer to the colored base material layer side. Incidentally, the method for producing the marking film of the present invention is not limited to the above method, after first laminating the pressure-sensitive adhesive layer and the release material layer on one surface of the colored base material layer, the other of the colored base material layer May be a method of laminating an ultraviolet shielding film on the surface of
A method of simultaneously laminating the ultraviolet shielding film on one surface of the colored base material layer and laminating the pressure-sensitive adhesive layer and the release material layer on the other surface of the colored base material layer may be adopted.

FIG. 1 is a sectional view showing the layer structure of the marking film of the present invention. As shown in FIG. 1, the marking film of the present invention has a five-layer structure in which an ultraviolet shielding film layer, an adhesive layer, a colored base material layer, an adhesive layer, and a release material layer are laminated in this order.

(Action) The marking film of the present invention
Since the ultraviolet shielding film layer is provided as the outermost layer on the surface side, excellent weather resistance is exhibited over a long period of time. In addition, the marking film of the present invention has a specific range of 2% modulus and has appropriate flexibility and shape followability, so that it exhibits excellent cubic curved surface workability and workability.

In particular, when the 2% modulus and the thickness of the ultraviolet ray shielding film layer and the colored base material layer are set to specific ranges, the above-mentioned properties are remarkably excellent.

[0051]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto. In the examples, “parts” means “parts by weight”.

Example 1 (1) Preparation of UV Shielding Film Layer Acrylic resin obtained by copolymerizing an acrylic monomer mixture consisting of 75 parts of methyl methacrylate, 20 parts of n-butyl acrylate and 5 parts of ethyl acrylate. Using an acrylic resin composition obtained by adding 5 parts of an ultraviolet absorber (trade name “LA36” manufactured by Asahi Denka Kogyo Co., Ltd.) to 100 parts of a resin (weight average molecular weight: 400,000, Tg: 70 ° C.), Extrusion was performed with a mold extruder to produce an ultraviolet shielding film layer having a thickness of 30 μm.

(2) Preparation of Colored Substrate Layer 100 parts of vinyl chloride resin (trade name "PSH-10", manufactured by Kaneka Chemical Co., Ltd.), plasticizer (trade name "P-300", manufactured by Asahi Denka Kogyo KK) ), 35 parts, white pigment (trade name "VT-77")
1 ", 45 parts by Dainichi Seika Kogyo Co., Ltd., stabilizer (trade name" A
A colored organosol composition comprising 10 parts of "C-110" (manufactured by Asahi Denka Kogyo Co., Ltd.) and 80 parts of an organic solvent (trade name "Solvesso", manufactured by Mitsubishi Chemical Corporation) was prepared. Next, using a comma coater, the colored organosol composition is coated on a process paper coated with an alkyd resin so as to have a thickness of 50 μm after drying, and dried to a thickness of 5 μm.
A colored substrate layer of 0 μm was produced.

(3) Preparation of Marking Film Using a comma coater, a two-part crosslinkable acrylic solvent is placed on the release surface of release paper (release material layer) that has been release-treated with a silicone release agent. The thickness after drying the mold adhesive is 30
μm and dried, and the thickness after drying is 3
An acrylic pressure-sensitive adhesive layer having a thickness of 0 μm was formed. Next, after laminating this pressure-sensitive adhesive layer on one side (the side not in contact with the process paper) of the colored base material layer obtained in (2), the other side of the colored base material layer (process paper) The process paper on the surface in contact with (a) is peeled off, and the other surface where the colored base material layer is exposed is dry-laminated using a urethane-based adhesive to obtain (1)
One surface of the ultraviolet shielding film layer obtained in step was bonded and laminated to prepare a marking film.

Example 2 In the production of a colored base material layer,
Polypropylene resin (weight average molecular weight: 250,000, elution amount at each temperature by cross fractionation method: 0) for the intermediate layer
-10 ° C = 48% by weight, more than 10 ° C and 70 ° C or less = 19
Weight%, more than 70 ° C and less than 95 ° C = 5% by weight, more than 95 ° C and less than 125 ° C = 28% by weight, manufactured by Montell JPO)
Using a colored polypropylene-based resin composition in which 4 parts of a cyanine blue pigment is added to 100 parts, a homopolypropylene resin for both outer layers (melt index: 3.
(9 g / 10 min) using a T-type multilayer extruder to form a film having a thickness of 40 μm, and then in-line, corona discharge treatment (42 × 10 ⁻⁵ N / cm) on both outer layer surfaces. Thus, a colored base material layer was produced. Next, a marking film was produced in the same manner as in Example 1 except that the above-mentioned colored base material layer was used.

(Example 3) An acrylic resin obtained by copolymerizing an acrylic mixed monomer comprising 70 parts of methyl methacrylate, 25 parts of n-butyl acrylate and 5 parts of ethyl acrylate in the preparation of an ultraviolet shielding film layer. (Weight average molecular weight: 400,000, Tg: 60 ° C) 1
Example 1 except that an acrylic resin composition to which 5 parts of an ultraviolet absorbent "LA36" was added to 00 parts was used.
In the same manner as in the above, an ultraviolet shielding film layer was produced. Next, a marking film was produced in the same manner as in Example 1 except that the above-mentioned ultraviolet shielding film layer was used.

Example 4 In producing a marking film, the thickness after drying formed in Example 1 was 30 μm instead of the dry lamination method using a urethane-based adhesive.
Example 1 except that the acrylic pressure-sensitive adhesive layer was laminated on one surface of the ultraviolet ray shielding film layer, and this pressure-sensitive adhesive layer was bonded to the other exposed surface of the colored base material layer. Similarly, a marking film was produced.

Comparative Example 1 An ultraviolet shielding film layer and a marking film were produced in the same manner as in Example 1 except that the thickness of the ultraviolet shielding film layer was changed to 8 μm.

Comparative Example 2 An ultraviolet shielding film layer and a marking film were produced in the same manner as in Example 1 except that the thickness of the ultraviolet shielding film layer was changed to 60 μm.

Comparative Example 3 The procedure of Example 1 was repeated except that the thickness of the ultraviolet shielding film layer was 8 μm and the thickness of the colored base material layer was 20 μm. A material layer and a marking film were produced.

(Comparative Example 4) The thickness of the colored base material layer was set to 120 μm.
A colored substrate layer and a marking film were produced in the same manner as in Example 1 except that m was used.

Comparative Example 5 A marking film was produced in the same manner as in Example 1 except that the ultraviolet shielding film layer was not laminated on the other exposed surface of the colored base material layer.

The 2% modulus of the ultraviolet shielding film layer, the colored base material layer and the marking film produced or used in Examples 1 to 4 and Comparative Examples 1 to 5 were measured by the above-mentioned measuring method. The results were as shown in Table 1.

Examples 1 to 4 and Comparative Examples 1 to 4
The performance (tertiary curved surface workability, flat sticking workability, weather resistance) of the marking film produced in Comparative Example 5 was evaluated by the following methods. The results were as shown in Table 1.

FIG. 2 is a sectional view showing a corrugated plate used for evaluation of tertiary curved surface workability. After releasing the release material layer (release paper) of the marking film,
The adhesive layer side of the marking film is adhered to the ridge of the corrugated plate having a cubic curved surface as shown in (3), and then pressed and adhered to the valley of the corrugated plate by using a special construction tool. After standing for days, the presence or absence of floating of the marking film was visually observed, and the tertiary curved surface workability was evaluated according to the following criteria. [Judgment Criteria] ○ ‥‥ Since the marking film had appropriate flexibility and shape followability, it could be applied without any problem. In addition, no lifting occurred at the peaks and valleys of the corrugated plate. X The construction was difficult because the flexibility and shape followability of the marking film were insufficient. In addition, significant lifting occurred in the valley of the corrugated plate

Flat sticking workability: Marking film 1
A flat plate was attached to a 000 mm x 2000 mm acrylic plate, and the workability at that time was evaluated according to the following criteria. [Judgment Criteria] ○ ‥‥ Marking film had moderate flexibility, excellent workability during flat application × ‥‥ Marking film was too soft or too hard,
Workability when flat pasting was poor because flexibility was not moderate

Weather resistance: The marking film was subjected to accelerated exposure for 400 hours using a super UV tester (manufactured by Dainippon Plastics Co., Ltd.), and the color difference before and after the accelerated exposure was measured. The criterion for determining whether the weather resistance is good or bad is that the color difference is good when the color difference is 0 to 5 or less.
If more than 5 and 8 or less, it is slightly defective, and if more than 8, it is defective.

[0068]

[Table 1]

As is clear from Table 1, the marking films of Examples 1 to 4 according to the present invention were all excellent in tertiary curved surface workability, workability in flat sticking, and weather resistance.

On the other hand, the ultraviolet shielding film layer 2
The marking film of Comparative Example 1 in which the% modulus was less than 3.92 N / 15 mm and the thickness was less than 10 μm was inferior in weather resistance. Further, the marking film of Comparative Example 5 in which the ultraviolet ray shielding film layer was not provided had extremely poor weather resistance.

The 2% modulus is 19.60 N / 1.
The marking films of Comparative Examples 2 and 4, which exceeded 5 mm and were thick, were poor in flexibility and shape followability, and thus poor in tertiary curved surface workability.

Further, the 2% modulus is 5.88 N / 1.
The marking film of Comparative Example 3 having a thickness of less than 5 mm and having a small thickness was too soft, and thus had poor workability in flat sticking and poor weather resistance.

[0073]

The marking film of the present invention has a structure in which an ultraviolet shielding film layer, an adhesive layer, a colored base material layer, a pressure-sensitive adhesive layer and a release material layer are laminated in this order.
Since the% modulus is set to be in a specific range, it has both excellent weather resistance over a long period of time and excellent tertiary curved surface workability and workability. In particular, the use of an ultraviolet-shielding film layer and a colored base layer having a specific range of a 2% modulus or thickness in the specific range significantly improves the above performance.

Therefore, the marking film of the present invention
It is suitably used as a marking film for outdoor use such as, for example, advertisement stickers, decorative stickers, display stickers, etc., as well as indoor use.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a layer structure of a marking film of the present invention.

FIG. 2 is a cross-sectional view showing a corrugated plate used for evaluation of tertiary curved surface workability.

Claims (3)

[Claims] 1. An ultraviolet shielding film layer, an adhesive layer, a colored base material layer, a pressure-sensitive adhesive layer and a release material layer are laminated in this order, and a 2% modulus defined in the text is 5.8.
A marking film having a thickness of 8 to 19.60 N / 15 mm. 2. The UV shielding film layer has a 2% modulus defined in the text of 3.92 to 14.70 N / 15 m.
2. The marking film according to claim 1, wherein the 2% modulus defined in the text of the colored base material layer is 2.94 to 14.70 N / 15 mm. 3. The thickness of the ultraviolet shielding film layer is from 10 to 10.
50 μm, and the thickness of the colored base material layer is 30 to 100 μm
The marking film according to claim 1 or 2, wherein: