JP4052988B2 - Glossy film - Google Patents

Description

  The present invention is useful as a base material for labels such as high-priced product authentication labels, unsealing prevention labels, content refill prevention labels, anti-replacement labels, tamper-proof labels, etc. The present invention relates to a glossy film that is useful for preventing re-sticking because wrinkles are formed in the glossy layer when it is peeled off after sticking, and it can be clearly seen that it has peeled off.

After the peeled label is replaced, an adhesive label for preventing replacement or an adhesive label that cannot be replaced, which can be easily understood as being peeled, is required and put into practical use. For example, in Patent Document 1, a combination of a plurality of adhesive layers and a hologram layer is used to partially change the adhesive strength, and at the time of peeling, the hologram layer partially remains on the adherend together with the adhesive layer. Preventing is disclosed. Patent Document 2 discloses that a notch is made in the label portion so that the hologram layer is surely broken when the label having the hologram layer is peeled off.
However, these pressure-sensitive adhesive labels have a problem that the configuration is complicated and the manufacturing cost is high.

  In Patent Document 3, the force required to peel the first layer from the second layer with the release agent is a, the adhesive force of the adhesive layer with the adherend is b, and the release sheet is the adhesive. When the force required to peel from the layer is c, a method for producing an anti-replacement label satisfying the following formula, c <a <b, (a) forming an adhesive layer on the release sheet; And (b) laminating a release agent layer containing wax on one main surface of the first layer, and (c) laminating and laminating the surface of the second layer laminated on the first layer. A process for producing a label for preventing reattachment, including a step, but this process is complicated, and when pulp paper is used for the surface material of the first layer, the water resistance is poor, so There is a drawback that when touched, it is easily broken and peeled off from the adherend substrate.

JP 2000-194265 A JP 2000-284673 A JP-A-8-99377

  The present invention solves these problems of the background art, and an object to be solved is to provide a film for preventing reattachment having a simple structure and excellent characteristics. That is, the present invention provides a film that is excellent in water resistance as a base material such as an anti-sticking label and does not require special processing for initiating destruction.

The present invention provides at least one surface of a base layer (A) made of a thermoplastic resin having a compression thickness of 15 μm or more when loaded with 32 kgf / cm ^{2 in the} thickness direction and having a porosity of 20 to 60%. One or more methods selected from the group consisting of metal direct vapor deposition, metal transfer vapor deposition, metal foil transfer, metal powder-containing paint coating, pearl pigment-containing paint coating, and a method of exposing and developing interference fringes on a photosensitive resin. And a glossy film (B) having a diffuse reflectance of 0 to 50% .
At that time, the opacity of the base layer (A) is preferably 60 to 100%, the thickness of the base layer (A) is preferably 20 to 500 μm, and the base layer (A) preferably has a multilayer structure. . Moreover, it is preferable that the base layer (A) includes at least a layer stretched in the uniaxial direction. The base layer (A) preferably contains one or more thermoplastic resins selected from polyolefin resins and polyester resins.

Further, it is preferable that the thickness of the gloss layer (B) is 0.02～100Myuemu.
Furthermore, any one of handwriting, printing, computer printing, engraving, laser processing, embossing, and hologram processing is performed directly on the gloss layer (B) or via an easy adhesion layer and / or a processing layer. It is preferable to form any one or more of characters, images, and background patterns by the above method.
Furthermore, it is preferable to provide an adhesive layer (C) at least on the side opposite to the glossy layer (B) side, and release paper (D) may be laminated on the adhesive layer (C).

  The glossy film of the present invention does not require special processing for initiating peeling, and is deformed with a small force. Therefore, the fact of peeling can be visually recognized by the appearance change after peeling. It can be effectively used for a wide range of applications.

Hereinafter, the glossy film of the present invention will be described in more detail.
As described above, the glossy film of the present invention is composed of a base layer (A) and a glossy layer (B). If necessary, an adhesive layer (C), release paper (D), or other laminated film may be provided. good.
When the glossy film of the present invention is adhesive-processed and attached to an adherend, it is assumed that the peeling of the film of the present invention proceeds by cohesive failure and / or interfacial peeling of the adhesive layer (C), At this time, the glossy film of the present invention causes irreversible compression deformation in the base layer (A), and wrinkles and deformation also occur in the glossy layer (B). .

[Base layer (A)]
The base layer (A) of the present invention is characterized in that the compression thickness when a load of 32 kgf / cm ^{2 in the} thickness direction is applied is 15 μm or more. If the compression thickness is less than this range, it is not preferable because the film of the present invention that has been adhesive-processed and stuck to an adherend is peeled off without causing wrinkles or deformation.
The compression thickness is determined by attaching a pressure unit to the tensile tester “Autograph AGS-5kND” (manufactured by Shimadzu Corporation), and measuring the thickness displacement when a load of 32 kgf / cm ^{2 is} applied with the CCD laser displacement sensor “LK3100” (( Measured by Keyence Corporation).

The porosity of the base layer (A) of the present invention is 20 to 60%. When the porosity is less than 20 %, it is not preferable because the film can be reattached without causing wrinkles or deformation when the film adhered to the adherend is peeled off. If the porosity exceeds 60%, the glossy film tends to be wrinkled or deformed even during normal use or processing, and it is difficult to handle.
The porosity is obtained by the following formula.
Porosity (%) = (ρ0 -ρ) / ρ0 × 100
(Where ρ0 is the true density and ρ is the density)
The density and true density were measured according to JIS-P-8118. Unless the material before stretching contains a large amount of air, the true density is approximately equal to the density before stretching.

The opacity of the present invention is based on JIS-P-8138, and a black and white standard plate is applied to the back of the measurement sample, and the ratio of light reflectance (black plate / white plate) is expressed as a percentage. . The opacity of the base layer (A) is preferably 60 to 100%, more preferably 80 to 100%. If the opacity is less than 60%, the concealing property of the glossy film is inferior, which is not preferable.
The thickness of the base layer (A) of the present invention is preferably 20 to 500 μm, and more preferably 20 to 400 μm. If the wall thickness is less than 20 μm, the gloss film is insufficient in strength, which is not preferable. If the thickness exceeds 500 μm, the strength of the glossy film becomes too high, and it is not preferred that the glossy film that has been adhesively processed and pasted on the adherend does not easily wrinkle or deform, and can be replaced. .

The base layer (A) of the present invention is composed of a thermoplastic resin, an inorganic fine powder and / or an organic filler.
Examples of the thermoplastic resin include ethylene resins such as high density polyethylene, medium density polyethylene, and low density polyethylene, or polyolefin resins such as propylene resin, polymethyl-1-pentene, and ethylene-cyclic olefin copolymer; nylon-6 Polyamide resins such as nylon-6,6, nylon-6,10, nylon-6,12; thermoplastic polyester resins such as polyethylene terephthalate and copolymers thereof, polyethylene naphthalate, aliphatic polyester; polycarbonate, attack Examples thereof include thermoplastic resins such as tick polystyrene, syndiotactic polystyrene, and polyphenylene sulfide. These may be used in combination of two or more. Among these, it is preferable to include one or more thermoplastic resins of polyolefin resins and polyester resins.
Among them, it is preferable to use a polyolefin-based resin excellent in processability, and among the polyolefin-based resins, a propylene-based resin and an ethylene-based resin are more preferable in terms of cost, water resistance, and chemical resistance.

  As such propylene-based resin, propylene homopolymer which is mainly composed of polypropylene and propylene which are isotactic or syndiotactic and various degrees of stereoregularity, and ethylene, butene-1, hexene-1, Copolymers with α-olefins such as heptene-1,4-methylpentene-1 are used. This copolymer may be a binary system, a ternary system, or a quaternary system, and may be a random copolymer or a block copolymer.

  As the inorganic fine powder, one having a particle size of usually 0.01 to 15 μm, preferably 0.01 to 8 μm, more preferably 0.03 to 4 μm is used. Specifically, calcium carbonate, calcined clay, silica, diatomaceous earth, talc, titanium oxide, barium sulfate, alumina, or the like can be used. You may use these in mixture of 2 or more types.

  As the organic filler, it is preferable to select a different type of resin from the thermoplastic resin that is the main component. For example, when the thermoplastic resin film is a polyolefin resin film, the organic filler may be polyethylene terephthalate, polybutylene terephthalate, polycarbonate, nylon-6, nylon-6,6, a cyclic olefin homopolymer or a cyclic olefin. Examples thereof include a copolymer of ethylene and ethylene having a melting point of 120 ° C. to 300 ° C. or a glass transition temperature of 120 ° C. to 280 ° C.

  Furthermore, you may mix | blend a stabilizer, a light stabilizer, a dispersing agent, a lubricant, etc. as needed. Stabilizers such as sterically hindered phenols, phosphorus-based, and amine-based stabilizers are 0.001 to 1% by weight, and light stabilizers include sterically hindered amine-based, benzotriazole-based, and benzophenone-based light stabilizers. 0.001 to 1% by weight of the inorganic fine powder dispersant, for example, silane coupling agents, higher fatty acids such as oleic acid and stearic acid, metal soaps, polyacrylic acid, polymethacrylic acid or salts thereof May be blended in an amount of 0.01 to 4% by weight.

The thermoplastic resin film forming the base layer (A) of the present invention may have a single layer structure or a multilayer structure. In the case of a multilayer structure, a two-layer structure or a structure having three or more layers may be used. In the case of a single layer structure, the film may be non-stretched, uniaxially stretched, or biaxially stretched. In the case of a two-layer structure, any combination of non-stretching / uniaxial stretching, non-stretching / biaxial stretching, monoaxial stretching / uniaxial stretching, monoaxial stretching / biaxial stretching, biaxial stretching / biaxial stretching, It doesn't matter. In the case of a structure of three or more layers, the single layer structure and the two layer structure may be combined, and any combination may be used.
The base layer (A) of the present invention has a multilayer structure, and is preferably a structure including a layer extended in at least a uniaxial direction in terms of function expression of the present invention.

When the base layer (A) is a single-layer polyolefin-based resin film and contains an inorganic fine powder and / or an organic filler, usually 40 to 99.5% by weight of a polyolefin-based resin, an inorganic fine powder and / or an organic filler It consists of 60 to 0.5% by weight, preferably 50 to 97% by weight of polyolefin-based resin, and 50 to 3% by weight of inorganic fine powder and / or organic filler.
When the base layer (A) has a multilayer structure and the base material layer and the surface layer constituting the base layer contain an inorganic fine powder and / or an organic filler, the base material layer usually has a polyolefin resin of 40 to 99.5 wt. %, Inorganic fine powder and / or organic filler 60 to 0.5 wt%, the surface layer consists of polyolefin resin 25 to 100 wt%, inorganic fine powder and / or organic filler 75 to 0 wt%, preferably The base material layer is made of 50 to 97% by weight of polyolefin resin, 50 to 3% by weight of inorganic fine powder and / or organic filler, and the surface layer is 30 to 97% by weight of polyolefin resin, 70% of inorganic fine powder and / or organic filler. ~ 3% by weight.

[Formation of base layer (A)]
The method for forming the base layer (A) of the present invention is not particularly limited, and various known methods can be used. Specific examples include a single-layer or multilayer T-die or I-die connected to a screw-type extruder. Cast molding to extrude the molten resin into a sheet shape using a circular die, inflation molding to extrude the molten resin into a tube shape with an air pressure inside, and roll the kneaded material with multiple hot rolls into a sheet shape And calendering, rolling forming, and the like.

[Lamination]
The base layer (A) constituting the glossy film of the present invention is preferably a laminate of a number of layers. Various known methods can be used for such a lamination method. Specific examples include a multi-layer die method in which dies are laminated in a die using a feed block and a multi-manifold, and an extrusion lamination method in which a plurality of dies are used. is there. It is also possible to use a combination of multilayer dies and extrusion lamination.

[Stretching]
Stretching can be performed by any of various methods that are usually used. As the stretching method, when a cast film is stretched, longitudinal stretching using the peripheral speed difference of the roll group, lateral stretching using a tenter oven, rolling, simultaneous biaxial stretching using a combination of a tenter oven and a linear motor, etc. Can be mentioned. In addition, examples of the method for stretching the inflation film include simultaneous biaxial stretching by a tubular method. The draw ratio is not particularly limited, and is appropriately determined in consideration of the characteristics of the thermoplastic resin used. For example, when a propylene homopolymer or a copolymer thereof is used as a thermoplastic resin, it is about 1.2 to 12 times, preferably 2 to 10 times when stretched in one direction, and biaxially stretched. Is an area magnification of 1.5 to 60 times, preferably 4 to 50 times. When using other thermoplastic resins, it is about 1.2 to 10 times, preferably 2 to 5 times when stretched in one direction, and 1.5 to 20 times in area magnification in the case of biaxial stretching. Preferably it is 4 to 12 times.

  The stretching temperature can be performed within a known temperature range suitable for thermoplastic resins having a glass transition temperature or higher but not higher than the melting point of the crystal part. Specifically, when the thermoplastic resin is a propylene homopolymer (melting point 155 to 167 ° C.), it is 100 to 164 ° C., and when it is a high density polyethylene (melting point 121 to 134 ° C.), it is 70 to 133 ° C. 1 to 70 ° C lower temperature. In addition, polyethylene terephthalate (melting point: 246 to 252 ° C.) is selected at a temperature at which crystallization does not proceed rapidly. The stretching speed is preferably 20 to 350 m / min.

[Glossy layer (B)]
The gloss layer (B) of the present invention is a method of direct metal deposition, metal transfer deposition, metal foil transfer, metal powder-containing paint coating, pearl pigment-containing paint coating, and a method of exposing and developing interference fringes on a photosensitive resin. It is formed by either of them.
Formation of the gloss layer (B) by direct vapor deposition of metal is performed by applying an anchor coating agent on at least one surface of the base layer (A), and then directly depositing aluminum or silver on the surface to form the gloss layer (B) as the base layer (A ) Provide on top. If the deposition surface of the base layer (A) is rough, the diffuse reflectance of the glossy layer (B) is improved and the gloss tends to be lost.

Formation of the glossy layer (B) by metal transfer vapor deposition uses a thermoplastic resin film as a release film, a release agent is applied onto the release film to form a release layer, and the surface of the release layer The substrate provided with a metal vapor deposition layer is dry laminated on the entire surface of the base layer (A) having an adhesive layer on the surface, the release film is peeled off, and the gloss layer (B) is provided on the base layer (A). When the deposition surface of the release film is rough, the diffuse reflectance of the glossy layer (B) is improved and the gloss tends to be lost.
Formation of the glossy layer (B) by metal foil transfer is so-called hot stamping, and a release film having a metal vapor deposition layer provided in the same manner as metal transfer vapor deposition is used as a transfer foil to form a base layer (A ) Is transferred to at least a part of the entire surface or the entire surface, and a glossy layer (B) is provided.

The thickness of the glossy layer (B) formed by direct metal deposition, metal transfer vapor deposition, and metal foil transfer is 0.02 to 100 μm and exhibits a metallic luster.
Formation of the luster layer (B) by coating with a metal powder-containing paint or a pearl pigment-containing paint uses a metal powder and / or pearl pigment, a resin as a binder, and a general inorganic and / or organic filler as a solvent. Can be mixed and diluted.
As the metal powder, aluminum flakes, aluminum paste, and other metal powders are used.
The pearl pigment is obtained by coating thin plate-like mica particles with a metal oxide such as titanium dioxide, zirconium oxide, or iron oxide, and has an average particle diameter of 1 to 150 μm.

  Resins that are binders include styrene / maleic anhydride copolymers, styrene / alkyl acrylate copolymers, polyvinyl alcohol, ethylene / vinyl alcohol copolymers containing silanol groups, polyvinyl pyrrolidone, ethylene / vinyl acetate copolymer. Polymers, methyl ethyl cellulose, sodium polyacrylate, casein, starch, polyethylene polyamine, polyester, polyacrylamide, vinylpyrrolidone / vinyl acetate copolymer, cation-modified polyurethane resin, and the like can be used as a solution resin or an emulsion.

The following can be used as a general inorganic and / or organic filler.
As the inorganic filler, those having a primary or secondary particle size of usually 0.01 to 15 μm can be used. For example, calcium carbonate, calcined clay, silica, diatomaceous earth, talc, titanium oxide, barium sulfate, alumina, zeolite and the like can be used.
Examples of the organic filler include polyolefin, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, nylon-6, nylon-6,6, polystyrene, acrylic resin, cyclic olefin homopolymer, cyclic olefin and ethylene copolymer, and these Various hollow fillers using these resins can be used.

In forming a paint, the metal powder and / or pearl pigment, a resin as a binder, and a general inorganic and / or organic filler can be used alone and / or in combination.
In addition to the above, an ultraviolet absorber, a surfactant and the like can be used as necessary.
The blending ratio of the metal powder and / or pearl pigment and the binder resin is preferably in the range of 10/100 to 80/100 in terms of solid content weight ratio.

The coating method to the base layer (A) of the gloss layer paint is performed by a roll coater, blade coater, bar coater, air knife coater, size press coater, gravure coater, reverse coater, die coater, lip coater, spray coater, etc. If necessary, smoothing is performed, and excess solvent is removed through a drying step.
Coating amount is 0.1 to 50 g / m ² as solid content after drying is preferably 1 to 30 g / m ^2.

The formation of the glossy layer (B) by exposing and developing the interference fringes on the photosensitive resin can use general hologram processing. The method of forming the hologram layer on the base layer (A) as the glossy layer (B) includes a method in which a photosensitive resin layer is directly coated on the base layer (A), the interference fringes are exposed and developed, and a metal transfer deposition method. In addition, as in the case of metal foil transfer, a method can be used in which interference fringes are exposed and developed on the photosensitive resin layer coated on the release film, and then the formed hologram layer is transferred onto the base layer (A). The release film is preferably transparent for the convenience of forming interference fringes described later.
The transfer method is easy to use because of the processability of the hologram itself and the ability to form a partially glossy layer (B) on the base layer (A).

As the hologram forming material, known materials such as a silver salt material, a dichromated gelatin emulsion, a photopolymerizable resin, and a photocrosslinkable resin are used. Generally, it can be used as a paint having a solid content of about 15 to 25% by a combination of a binder resin, a photopolymerizable compound, a photopolymerization initiator, a sensitizer, and a solvent.
The coating is applied directly on the base layer (A) or on the transparent release film, dried and solidified, and adjusted to a thickness of 0.1 to 50 μm. In the case of direct coating on the base layer (A), a peelable transparent protective film can be pasted on the coating layer.

The exposure of the interference fringes on the coating layer is recorded by using a two-beam laser beam from the transparent protective film or transparent release film side, or the interference light between the object beam and the reference beam is recorded. The original plate is adhered to the coating layer, laser light is incident from the transparent release film side, reflected light from the original plate and interference fringes of the incident light are recorded, and hologram information can be recorded.
Thereafter, the photopolymerization initiator is decomposed by irradiation with ultraviolet rays or electron beams, and the photopolymerizable compound is diffused and transferred by heating to stabilize the interference fringes.

The gloss layer (B) formed by the above methods can be colored by adding a color pigment in the layer, or by providing a transparent layer containing a color pigment on the gloss layer (B).
The glossy layer (B) of the present invention has a diffuse reflectance of 0 to 50% measured by the method described in JIS-Z-8722 . If the diffuse reflectance is more than 50%, gloss is lost, undesirably difficult wrinkles or deformation is clearly visible that occur when peeling the present film stuck adhesive processed in the adherend.

The thickness of the glossy layer (B) of the present invention is preferably 0.02 to 100 μm, and more preferably 0.02 to 80 μm. When the thickness is less than 0.02 μm, the diffuse reflectance is not in the desired range, which is not preferable. On the other hand, when the thickness exceeds 100 μm, wrinkles and deformation are less likely to occur when the present film that has been adhesive-processed and attached to an adherend is peeled off.
One or more methods selected from handwriting, printing, computer printing, engraving, laser processing, embossing, and hologram processing, directly on the glossy layer (B) or via an easy-adhesion layer and / or a processing formation layer Thus, any one or more of characters, images, and background patterns can be formed. With these recorded information, the deformation of the recorded information itself can be remarkably visually recognized along with the wrinkles and deformation that occur when peeling the film that has been adhesive-processed and pasted on the adherend, making it easier to recognize the fact of pasting. Therefore, it is preferable.

[Adhesive layer (C)]
The glossy film of the present invention can be provided with an adhesive layer (C) on the side opposite to the glossy layer (B) side, if necessary.
The adhesive strength (or cohesive strength) of the adhesive layer (C) when the label provided with the adhesive layer (C) is attached to the adherend and peeled is such that irreversible compression deformation occurs in the base layer (A). It is preferable to select a material that is weaker than the strength (or cohesive force) of the substrate (A) so that the base layer (A) does not break.
Typical examples of such adhesives include rubber adhesives, acrylic adhesives, and silicone adhesives. Specific examples of rubber adhesives include polyisobutylene rubber, butyl rubber and a mixture thereof, or these rubbers. And a tackifier such as abietic acid rosin ester, terpene / phenol copolymer, terpene / indene copolymer and the like. As specific examples of the acrylic pressure-sensitive adhesive, the glass transition point of 2-ethylhexyl acrylate / n-butyl acrylate copolymer, 2-ethylhexyl acrylate / ethyl acrylate / methyl methacrylate copolymer, or the like is −20 ° C. or lower. Things.

As a form of these pressure-sensitive adhesives, a solvent type, an emulsion type, a hot melt type, and the like are used, and they are generally laminated by applying a solvent type or an emulsion type. Such coating is performed by a roll coater, blade coater, bar coater, air knife coater, gravure coater, reverse coater, die coater, lip coater, spray coater, comma coater, etc. The adhesive layer (C) is formed.
The pressure-sensitive adhesive layer (C) is generally formed by applying a pressure-sensitive adhesive to the release paper (D) described later, drying as necessary, and laminating a glossy film on the pressure-sensitive adhesive layer. However, it can also be formed by directly applying an adhesive to the glossy film as required. The coating amount of the pressure-sensitive adhesive is not particularly limited, but is usually in the range of ^{3 to} 60 g / m ² , preferably 10 to 40 g / m ² in terms of solid content.

When the adhesive force between the glossy film and the pressure-sensitive adhesive is small, it is preferable to apply an anchor coating agent to the surface of the glossy film that contacts the pressure-sensitive adhesive before laminating or coating the pressure-sensitive adhesive. As the anchor coating agent, polyurethane, polyisocyanate / polyether polyol, polyisocyanate / polyester polyol / polyethyleneimine, alkyl titanate, etc. can be used, and these are generally organic solvents such as methanol, ethyl acetate, toluene, hexane, Used by dissolving in water. Coated amount of anchor coating agent, 0.01-5 g / m ² by solid content after coating and drying, is preferably in the range of 0.02~2g / m ^2.

[Release paper (D)]
If necessary, a release paper (D) can be provided on the adhesive layer (C). The release paper (D) provided on the glossy film via the adhesive layer (C) is subjected to silicone treatment on the surface in contact with the adhesive layer (C) in order to improve the peelability from the adhesive layer (C). It is common. The release paper (D) can be a general one, and high-quality paper or kraft paper can be used as it is, or calendered, resin-coated, film-laminated, glassine paper, coated paper, plastic film For example, a silicone treated product can be used.

Hereinafter, the present invention will be described more specifically with reference to Examples, Comparative Examples, and Test Examples. The materials, amounts used, ratios, operations, and the like shown below can be changed as appropriate without departing from the spirit of the present invention. Therefore, the scope of the present invention is not limited by the specific examples shown below. The% described below is% by weight unless otherwise specified.
Table 1 summarizes the thermoplastic resins and fillers used in the production examples of the present invention.
Table 2 summarizes the thermoplastic resin compositions used in Examples and Comparative Examples of the present invention.

[Manufacture of base layer (A)]
(Production Example 1)
The thermoplastic resin composition a shown in Table 2 is the composition (A1), the thermoplastic resin composition b is the composition (A2), and the thermoplastic resin composition c is the composition (A3). The mixture was melt kneaded at 250 ° C. using an extruder.
Thereafter, each was supplied to one coextrusion die and laminated (A2 / A1 / A3) in the die, then extruded into a sheet shape, cooled to 60 ° C. with a cooling roll, and a laminated film was obtained.
This film was reheated to 145 ° C., then stretched 5 times in the machine direction by utilizing the peripheral speed difference of many roll groups, reheated to 150 ° C., and stretched 8.5 times in the transverse direction by a tenter. . Then, after annealing at 160 ° C., cooling to 60 ° C., slitting the ears, and having a three-layer structure (biaxial stretching / biaxial stretching / biaxial stretching) thickness 54 μm (A2 / A1 / A3 = 4 μm) / 46 μm / 4 μm), a base layer having a porosity of 40%, a compressed thickness of 22.4 μm when loaded with 32 kgf / cm ^{2 in the} thickness direction, an opacity of 90%, and a density of 0.78 g / cm ³ A) was obtained.

(Production Example 2)
Table 2 shows the thermoplastic resin composition d as the composition (A1), which is kneaded by an extruder set at a temperature of 270 ° C., then extruded into a sheet shape by a die, further cooled by a cooling device, and unstretched. A film was obtained. This film was reheated to a temperature of 150 ° C. and then stretched 5 times in the machine direction to obtain a 5 times longitudinally stretched film.
The thermoplastic resin composition e shown in Table 2 was used as the composition (A2), kneaded at 210 ° C. with another extruder, and then extruded into a sheet by a die. The laminate was laminated on both sides of the double-longitudinal stretched film to obtain a laminated film having a three-layer structure. Next, this three-layer laminated film was cooled to a temperature of 60 ° C., then reheated to a temperature of 155 ° C., stretched 9 times in the transverse direction using a tenter, and annealed at a temperature of 165 ° C. After cooling to a temperature of 60 ° C. and slitting the ears, the thickness of the three-layer structure (uniaxial stretching / biaxial stretching / uniaxial stretching) is 110 μm (A2 / A1 / A2 = 25 μm / 60 μm / 25 μm). With the laminated film, a base layer (A) having a porosity of 32%, a compression thickness of 24.3 μm when loaded with 32 kgf / cm ^{2 in the} thickness direction, an opacity of 94%, and a density of 0.77 g / cm ³ was obtained.

(Production Example 3)
The thermoplastic resin composition f shown in Table 2 was used as the composition (A1) and kneaded in an extruder set at a temperature of 270 ° C., and then extruded into a sheet by a die and further cooled by a cooling device. An unstretched film was obtained. This film was reheated to a temperature of 160 ° C. and then stretched 4 times in the longitudinal direction to obtain a 4 times longitudinally stretched film.
The thermoplastic resin composition g shown in Table 2 was used as the composition (A2), kneaded at 230 ° C. in another extruder, and then extruded into a sheet shape by a die. The laminate was laminated on both sides of the double-longitudinal stretched film to obtain a laminated film having a three-layer structure. Next, this three-layer laminated film was cooled to a temperature of 60 ° C., then reheated to a temperature of 170 ° C., stretched 9 times in the transverse direction using a tenter, and annealed at a temperature of 170 ° C. After cooling to a temperature of 60 ° C. and slitting the ears, the thickness of the three-layer structure (uniaxial stretching / biaxial stretching / uniaxial stretching) is 65 μm (A2 / A1 / A2 = 15 μm / 35 μm / 15 μm). A base layer (A) having a porosity of 5%, a compression thickness of 9.6 μm when loaded with 32 kgf / cm ^{2 in the} thickness direction, an opacity of 30%, and a density of 1.01 g / cm ³ was obtained from the laminated film.

(Production Example 4)
A commercially available transparent PET film having a thickness of 50 μm (trade name “Diafoil T600E”, manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.) was used as the base layer (A). The PET film has a porosity of 0%, a compressed thickness of 2.3 μm when loaded with 32 kgf / cm ^{2 in the} thickness direction, an opacity of 3.5%, and a density of 1.4 g / cm ³ .
The production results of the base layer (A) are summarized in Table 3.

[Preparation of transfer foil for glossy layer (B)]
(Production Example 5)
Metal foil Commercially available aluminum-deposited transfer foil (trade name “AFU silver”, film thickness 42 μm, manufactured by Murata Gold Foil Co., Ltd.) was used as the transfer foil for the gloss layer (B).
(Production Example 6)
Hologram foil A commercially available hologram transfer foil (trade name “hologram pattern film KP32”, film thickness 74 μm, manufactured by Nippon Koban Co., Ltd.) was used as the transfer foil for the gloss layer (B).

[Examples 1-3 and Comparative Examples 1-3]
[Formation of glossy layer (B)]
A urethane adhesive “manufactured by Toyo Morton Co., Ltd.” as an anchor agent on the (A2) layer surface of the base layer (A) obtained in Production Example 1 and on one side of the base layer (A) obtained in Production Examples 2 to 4 A mixture of BLS-2080A ”and curing agent“ BLS-2080B ”was applied and dried so that the coating amount after drying was 1 g / m ² .
Next, the transfer foils obtained in Production Examples 5 and 6 were transferred to the anchor agent-coated surface of the base layer (A) by a foil stamper “MP-6A” manufactured by Navitas to form a gloss layer (B). Further, fine characters were printed as a background pattern on the glossy layer (B) by UV offset printing to give Examples 1 to 3 and Comparative Examples 1 to 3 of the gloss film of the present invention. The results are shown in Table 4.

[Test example]
Laminating a polyethylene film on both surfaces of woodfree paper, wall thickness was subjected to silicone treatment on one side 173Myuemu, the silicone-treated surface of the release paper of density 0.9 g / cm ³ (release paper (D)), Toyo Ink Mfg. (Co. ) Pressure sensitive adhesive “Olivein BPS-1109” (trade name) made by applying with a comma coater so that the solid content is 25 g / m ² and drying to form an adhesive layer (adhesive layer (C)) Then, the glossy films prepared in Examples 1 to 3 and Comparative Examples 1 to 3 were laminated so that the gloss layer (B) side and the opposite surface side were in contact with each other, and a laminate consisting of gloss film / adhesive layer / release paper A structural label was obtained.

[Evaluation]
The opacity, porosity, and compression thickness were measured or calculated by the methods described above. The results are shown in Table 3. (Diffuse reflectance)
The diffuse reflectance was determined by calculating the average value of the diffuse reflectance of each wavelength measured in the wavelength range of 400 to 700 nm using an optical trap according to JIS-Z8722.

(Ease of deformation during peeling)
The labels were cut into 5 cm × 5 cm squares, the release paper was peeled off, and then stuck on the glass. After sticking, one of the four sides was held by hand, peeled off from the glass, and the ease of deformation of the glossy film when peeled was evaluated as follows.
Ease of deformation ○ Good Wrinkles on glossy surface, uneven gloss and remarkable deformation of printed characters × Defects Little change in appearance and deformation compared to before peeling.
The results are shown in Table 4.

  The glossy film of the present invention can be effectively used for a wide range of applications such as a label for preventing replacement and a label for preventing falsification.

Claims (10)

Direct metal deposition on at least one surface of a base layer (A) made of a thermoplastic resin having a compression thickness of 15 μm or more when loaded with 32 kgf / cm ^{2 in the} thickness direction and having a porosity of 20 to 60% , Formed by any one or more of metal transfer vapor deposition, metal foil transfer, metal powder-containing paint coating, pearl pigment-containing paint coating, and photosensitive resin exposure and development, diffuse reflection A glossy film comprising a glossy layer (B) having a rate of 0 to 50% .   The gloss film according to claim 1, wherein the opacity of the base layer (A) is 60 to 100%.   The glossy film according to claim 1 or 2, wherein the thickness of the base layer (A) is 20 to 500 µm.   The glossy film according to any one of claims 1 to 3, wherein the base layer (A) has a multilayer structure.   The glossy film according to any one of claims 1 to 4, wherein the base layer (A) includes a layer stretched in at least one axial direction.   The glossy film according to any one of claims 1 to 5, wherein the base layer (A) contains a thermoplastic resin containing at least one of a polyolefin resin and a polyester resin. The glossy film according to any one of claims 1 to 6, wherein the glossy layer (B) has a thickness of 0.02 to 100 µm.   One or more methods selected from handwriting, printing, computer printing, engraving, laser processing, embossing, and hologram processing, directly on the glossy layer (B) or via an easy-adhesion layer and / or a processing layer The gloss film according to claim 1, wherein at least one of a character, an image, and a background pattern is formed.   A label, wherein an adhesive layer (C) is provided on the side opposite to the glossy layer (B) side of the glossy film according to claim 1.   The label according to claim 9, wherein a release paper (D) is laminated on the adhesive layer (C).