JP2015016641A - Molding decorative film, production method, production equipment and decorative molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems of conventional decorative films including poor foil cutting properties, absence of transparency of the film itself, poor adhesiveness between a molding and an image layer, low ink fixability and impossibility of being excellent in durability, e.g. water and weather resistance, for a wide variety of moldings and keeping a high-image-quality condition.SOLUTION: A molding decorative film A has, on one side of a substrate film a1, an image layer formed with a digital printing ink a4 on a digital anchor layer a3 through at least a surface-treated layer a2, from the side of the substrate film a1, and the digital anchor layer is based on an oil resin.

Description

  In the present invention, for example, at least a surface treatment layer, a digital anchor layer, and a digital printing ink are used on the surface of various molded products such as a synthetic resin base material, a wood base material, an inorganic base material, and a metal base material. The present invention relates to a molded product decorative film in which an image layer is laminated, a manufacturing method and manufacturing equipment, and a decorative molded product decorated with the molded product decorative film.

  Conventionally, as a decoration method for molded products, decorative layers in which image layers formed on the surface of various base materials such as synthetic resin base materials, wood base materials, inorganic base materials, metal base materials are laminated. The film was transferred by a thermal transfer method, an in-mold transfer method, a simultaneous molding method, or the like.

  The decorative film forms an image layer by pattern printing by gravure printing, silk printing, offset printing, letterpress printing, flexographic printing, or the like. In addition, the decorative film has limitations in the representation of continuous tone images, characters, fine lines, and printed pattern matching accuracy, and it may be necessary to modify the design.

  Therefore, the conventional decorative film requires printing plate making, which requires a great deal of cost and delivery time. Also, thinner and waste are used to wash the plate after printing, and these are treated as industrial waste. Therefore, it was not environmentally friendly.

  Therefore, instead of the conventional printing method, a so-called digital printing machine has been used for the formation of the image layer in the decorative film, for example, as in Patent Document 1. Japanese Patent Application Laid-Open No. H10-260260 describes that after a substrate film, a release layer, an image receiving layer, and a heat seal layer are laminated with a water-based inkjet printer, printing is performed on the molded product.

  By the way, an ink jet printing system, a laser printing system, and the like are widely used in digital printing machines. The ink used in these systems is widely used in the case of the inkjet printing system, and in the case of the laser printer system, the powder ink or the electron ink in which the powder toner contains oil is used. ing. In the case of producing a decorative film using these inks, an aqueous coating liquid is used as the receiving layer for the purpose of fixing the ink.

  From the viewpoint of digital printing ink fixability, for example, in the field of ink jet receptive layer, an ink jet receptive layer in which a water-absorbent resin such as polyvinyl alcohol (PVA) is contained in a large amount of particles such as silica is known. ing.

  However, in any case, since the above-mentioned decorative film has a water-receiving layer, it is poor in characteristics contrary to the ink fixing property, that is, water resistance (there is no problem even if wiped after water is applied). There was a problem.

  Therefore, in Patent Document 2, the base film, the solvent absorption layer, and the heat seal layer are laminated in this order in order to compensate for the poor water resistance caused by the water-receiving layer being water. A decorative film has been proposed in which the heat seal layer has an image printed by an organic solvent-based ink jet printer and the total thickness is 50 μm or less.

However, since such an ink-jet receiving layer applies a considerable amount of ink (usually 10 g / m ² or more) in order to maintain the ink fixing property, the so-called foil breakage, the film itself, The lack of transparency is a problem.

  Furthermore, when using a water-absorbing resin (aqueous coating liquid) to obtain ink fixing properties, the compatibility between the layer interface with other oil-based resins used is poor and the molded product and ink (image layer) after molding. ) Has poor adhesion, and there has been a problem of poor adhesion.

  In addition to the above, the decorative film requires ink fixability in addition to a thin film and transparency. As a result, the conventional decorative film has durability (water resistance) for a wider range of molded products. ) And high image quality could not be maintained.

JP 2009-255322 A JP 2013-56459 A

  The problem to be solved by the present invention is that the conventional decorative film is based on the fact that the ink used in the digital printing device is water-based, so that the receiving layer in the decorative film is also an aqueous coating liquid. As a result, problems such as poor foil breakage and lack of transparency of the film itself are problems, and the adhesion between the molded product and the image layer is poor and the ink fixing property is low, making it durable against a wide range of molded products. It is excellent in (water resistance) and cannot maintain a high-quality state.

  The present invention solves the above-mentioned problems, can securely form a digital printed image on the surface of the base film, has good adhesion between the image layer and the molded product after decoration of the molded product, and further improves the surface properties of the printed image. The purpose is to provide an excellent decorative film for molded products.

  In order to achieve the above object, according to the present invention, an image layer made of digital printing ink is formed on one surface of the base film on the digital anchor layer through at least the surface treatment layer from the base film side. It is a molded product decorative film, and the digital anchor layer is mainly composed of an oil-based resin as a main component.

  According to the present invention, since the digital anchor layer is mainly composed of an oil-based resin, an oil-based digital print image can be reliably formed on the base film, the image layer and the molded product have good adhesion, and printing is further performed. A molded article decorative film having excellent surface physical properties of the image can be obtained.

  In addition, since the decorative film of the present invention does not require plate making and color matching as in analog printing, a molded product decorative film can be obtained at a low cost and a short delivery time, and the printing plate can be washed. Since it is not necessary, industrial waste can be reduced and the environment is excellent.

It is a figure which shows schematic structure of the molded article decoration film of this invention. It is a figure which shows the manufacturing equipment structure of the molded article decoration film of this invention.

  As shown in the schematic cross-sectional view of FIG. 1, the molded product decorative film A of the present invention has a surface treatment layer a2, a digital anchor layer a3, a digital printing ink a4 (image layer) on one surface of the base film a1. ), The adhesive layer a5 is sequentially formed. However, the decorative film of the present invention is not limited to the laminate as illustrated in FIG.

  As the base film a1, those widely used in this field can be used, and are not particularly limited. Specific examples of the base film a1 include polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyether ketone, polyether sulfone and other highly heat-resistant polyester, polypropylene, polyolefin, polycarbonate, cellulose acetate, polyethylene derivatives, poly Examples thereof include plastic films such as vinyl chloride, polyvinylidene chloride, polystyrene, polyamide, polyimide, polymethylpentene, and ionomer, and laminates thereof.

  The plastic film may be stretched or unstretched. The thickness of the base film a1 can be appropriately selected in consideration of strength, heat resistance, and the like, but is usually appropriately selected from the range of about 1 to 100 μm. When the base film a1 is thinner than 1 μm, the strength and heat resistance are poor, and when it is thicker than 100 μm, the overall thickness of the decorative film A is increased and the followability to the surface properties (such as irregularities) of the molded product is poor.

  The surface treatment layer a2 is made of a resin excellent in transparency, scratch resistance, light resistance, and water resistance. As the resin constituting the surface treatment layer a2, fluorine resin, acrylic resin (used to include both acrylic resin and methacrylic resin), cellulose derivative resin, urethane resin, acetate vinyl resin, acrylic resin Various resins such as vinyl resin, polycarbonate resin, polyester resin, polystyrene resin, maleic anhydride resin, and silicone resin can be used, and they can be used alone or in a mixture of two or more.

  For the surface treatment layer a2, a vinyl-modified acrylic resin with a particularly high molecular weight is selected as a preferred resin. If a resin with a softening point that is too low is used, there is a tendency to cause a problem that good decoration cannot be performed due to insufficient heat resistance. Resins with a softening point that is too high are often poorly soluble and coated. There is a problem that is not suitable for.

  Moreover, you may add a hardening | curing agent to the surface treatment layer a2. The curing agent added to the surface treatment layer improves interlayer adhesion characteristics with the digital anchor layer a3. As the curing agent, an aluminum chelate curing agent, an isocyanate compound, or the like is preferable from the viewpoint that a rapid reaction needs to be completed by the heat amount of the gravure-coated dry hood.

  For the surface treatment layer a2, a leveling agent, an antifoaming agent, a surfactant, a fluorescent brightening agent, an ultraviolet absorber, a lubricant (polyethylene wax, paraffin wax, etc.) from the viewpoint of improving the coating suitability and adjusting the glossiness. ) Additives may be added.

  Moreover, in order to protect digital anchor layer a3 and digital printing effectively, and to suppress generation | occurrence | production of the foil burr | flash at the time of decoration of a molded article, the surface treatment layer a2 is 0.2-0.9 micrometer in film thickness. When the thickness is larger than 0.9 μm, foil burrs are likely to occur during molding decoration, and when it is thinner than 0.2 μm, the protection of digital printing is poor.

  The digital anchor layer a3 is composed of a porous oil-based coating liquid containing a lubricant and a binder. As the binder resin constituting the digital anchor layer a3, cellulose derivative resin, acrylic resin (used to include both acrylic resin and methacrylic resin), urethane resin, acetate vinyl resin, acrylic resin Various resins such as vinyl resins can be used, and they can be used alone or in a mixture of two or more. Among them, a preferable resin is a vinyl chloride modified acrylic resin and a vinyl chloride modified acrylic resin having a particularly high molecular weight.

  As the resin for the lubricant constituting the digital anchor layer a3, synthetic wax such as polyethylene wax, petroleum wax such as paraffin wax, and the like can be used. Among these, synthetic waxes such as polyethylene wax are preferable.

  As for the ratio of the polyethylene wax and the vinyl-modified acrylic resin, 5 to 15% polyethylene wax is added to the vinyl-modified acrylic resin 100. Preferably it is used in the range of 10-15%. When the polyethylene wax is less than 5%, the fixing property of the digital printing ink a4 is lowered, and when the polyethylene wax is more than 15%, the transparency is lowered.

  The total amount of vinyl-modified acrylic resin and polyethylene wax used is 1 to 20% by weight, preferably 5 to 7% by weight, based on the total weight of the coating solution for the digital anchor layer a3. When the total amount of the vinyl-modified acrylic resin and polyethylene wax is less than 1% by weight of the total weight, the fixing property of the digital printing ink a4 is poor and drying is slow. It becomes easy to generate | occur | produce the adhesive fall at the time.

  On the other hand, the digital anchor layer a3 preferably has a film thickness of 2 to 5 μm from the fixability of the digital printing ink a4 and the adhesion stability during molding decoration, and if it is thicker than 5 μm, the adhesion deterioration during molding decoration is reduced. It tends to occur. When the thickness is less than 2 μm, the fixability of the digital printing ink a4 is poor and drying is also slow.

  As the digital printing ink a4, various digital printing inks such as an inkjet water-based dye type, an aqueous pigment type, a solvent dye type, a solvent pigment type, a latex type, a laser powder toner type, and an indigo electro ink type can be used. . The coating material constituting the surface treatment layer a2 to the digital anchor layer a3 corresponds to all the above digital printing inks.

  The adhesive layer a5 plays a role of adhering the digital printing ink to the molded product during molding decoration. As the resin constituting the adhesive layer a5, any resin containing a conventionally known pressure-sensitive adhesive, heat-sensitive adhesive or the like can be used, and a thermoplastic resin having a glass transition point (Tg) of 20 to 70 ° C. Is preferred.

  Specific examples of such thermoplastic resins include polyester resins, vinyl chloride-vinyl acetate copolymer resins, acrylic resins, chlorinated polypropylene resins, polyethylene resins, and polyolefin resins. The adhesive layer a5 may contain additives such as an antiblocking agent, a colorant, and a lubricant.

  The molded product decorative film A of the present invention is manufactured by sequentially laminating a surface treatment layer a2, a digital anchor layer a3, a digital printing ink a4, and an adhesive layer a5 on one surface of the base film a1. The present invention sequentially and sequentially laminates and completes the production in one line process. FIG. 2 shows a schematic configuration of a production facility B for the molded product decorative film A of the present invention, and a method for producing the molded product decorative film A of the present invention is described together with the configuration of the production facility B with reference to FIG. To do.

  The base film a1 is continuously sent out from the unwinding device b1. The base film a1 enters the coating head b2, and the coating liquid that becomes the surface treatment layer a2 and the digital anchor layer a3 is applied there. As a coating method, for example, any one of a roll coater, an air knife coater, a blade coater, a rod coater, a bar coater, a comma coater, a gravure coater, and the like is used to coat the surface of the base film a1.

  The base film a1 coated on the surface is dried by a drying device b3, and then transported to a digital print head b4, and a digital image using the digital printing ink a4 is printed (formed) on the digital anchor layer a3. ) As the digital printing method, various methods such as an ink jet printing method, a laser printing method, and a thermal thermal transfer method can be used.

  The base film a1 on which the digital image is printed is conveyed to the silk print head b5. When the digital print image loses its color due to the design after molding decoration, printing is performed using a shape plate in silk printing in order to maintain concealment. If it is necessary to shape the adhesive to prevent foil burrs at the time of molding due to the characteristics of the molding resin, printing is performed using a shape plate by silk printing.

  In cases other than those described above, the concealing coating solution and the adhesive layer coating solution are applied to the base film a1 on which the digital image is printed using the coating head b7. Subsequently, the film passes through the drying device b8 and is wound by the winding device b9 to complete the roll-shaped molded product decorative film A.

  In addition, the molded article decorative film A itself of the present invention is not limited to the manufacturing equipment B of the present invention, and is manufactured by a single device, for example, when the long belt-like base film a1 is not used. Also good.

Hereinafter, the Example of the molded article decorative film A of this invention is described.
Example 1
A 25 μm thick PET film (FE2000 manufactured by FUJIMURA CHEMICAL CO., LTD.), Which is a base film a1, is fed out from the unwinding device b1, and a modified acrylic resin (DIC acrylic resin MCS5066) is formed as a surface treatment layer a2 on one side of the base film a1. It apply | coated with the gravure roll coater used as the coating head b1 so that it might become 0.7 micrometer, and it dried at the temperature of 60 degreeC with the drying apparatus b3.

  Thereafter, a digital anchor layer a3 resin (DIC chloroacetic acid biacrylic resin TA04) in which a lubricant and a vinyl chloride vinyl chloride resin are mixed as a digital anchor layer a3 is applied by a gravure roll coater using the digital print head b4, and dried. The film thickness was 2 μm.

  Next, on the digital anchor layer a3, a reverse image of a desired image was formed with the digital printing ink a4 in an HP indigo digital printing machine (WS4500) used as the digital print head b4. A clear image with no blurring could be formed.

  Thereafter, a gravure roll coater used as a coating head b7 on a digital anchor layer a3 on which an image layer has been formed so that a chlorinated polypropylene resin (DICTP-06) has a thickness of about 1 μm as an adhesive layer a5. And dried at a temperature of 60 ° C. with a drying apparatus b8.

  The decorative film A on which a digital image was formed as described above and a decorative molded product (polypropylene, thickness 3 mm) were faced to each other, and heated and pressurized at a temperature of 180 ° C. to peel off the base film a1.

  The digital image was uniformly transferred on the polypropylene molded article without any transfer omission or foil burrs. The transferred image was free from image distortion such as ink crushing and bleeding, and the adhesion to the decorative molded product was good. Further, the surface of the transfer image is provided with a surface treatment layer a1, and even if the surface is rubbed, the image is not destroyed. In addition, the ink did not discolor even when exposed outdoors. Furthermore, the water resistance was also good.

(Example 2)
A 25 μm thick PET film (FE2000 manufactured by Futamura Chemical Co., Ltd.), which is the base film a1, is sent out from the unwinding device b1, and a modified acrylic resin (Daiichi Seisaku acrylic resin TMR800) is used as a surface treatment layer a2 on one side of the base film a1. The film was applied with a gravure roll coater used as the coating head b1 so as to have a film thickness of 0.7 μm, and dried at a temperature of 60 ° C. with a drying apparatus b3.

  Thereafter, a digital anchor layer a3 resin (DIC chloroacetic acid biacrylic resin TA04) in which a lubricant and a vinyl chloride vinyl chloride resin are mixed as a digital anchor layer a3 is applied by a gravure roll coater using the digital print head b4, and dried. The film thickness was 2 μm.

  Next, on the digital anchor layer a3, a reverse image of a desired image was formed with the digital printing ink a4 in Canon LBP-5600SE used as the digital printing head b4. At this stage, there was no ink tray or bleeding. A clear image could be formed.

  Thereafter, a gravure roll coater used as a coating head b7 on a digital anchor layer a3 on which an image layer has been formed so that a chlorinated polypropylene resin (DICTP-06) has a thickness of about 1 μm as an adhesive layer a5. And dried at a temperature of 60 ° C. with a drying apparatus b8.

  The decorative film A on which a digital image was formed as described above and a decorative molded product (polypropylene, thickness 3 mm) were faced to each other, and heated and pressurized at a temperature of 180 ° C. to peel off the base film a1.

  The digital image was uniformly transferred on the polypropylene molded article without any transfer omission or foil burrs. The transferred image was free from image distortion such as ink crushing and bleeding, and the adhesion to the decorative molded product was good. Further, the surface of the transfer image is provided with a surface treatment layer a1, and even if the surface is rubbed, the image is not destroyed. In addition, the ink did not discolor even when exposed outdoors. Furthermore, the water resistance was also good.

Example 3
A 25 μm thick PET film (FE2000 manufactured by Futamura Chemical Co., Ltd.), which is the base film a1, is sent out from the unwinding device b1, and a modified acrylic resin (Daiichi Seisaku acrylic resin TMR800) is used as a surface treatment layer a2 on one side of the base film a1. It was applied with a gravure roll coater used as the coating head b1 so as to have a thickness of 0.7 μm, and dried at a temperature of 60 ° C. with a drying apparatus b3.

  Then, as a digital anchor layer a3, a resin and a resin for digital anchor layer a3 (Takamatsu oil and fat salt vinegar biacrylic resin NS-625XC) mixed with a lubricant and a vinyl vinegar resin are applied with a gravure roll coater using as a digital print head b4. The film thickness after drying was 5 μm.

  Next, on the digital anchor layer a3, a reverse image of a desired image is formed with the digital printing ink a4 in the LX900 manufactured by Nihon Electronics Industry used as the digital print head b4. At this stage, there is no ink trace or bleeding. A clear image could be formed.

  Thereafter, a gravure roll coater used as a coating head b7 on a digital anchor layer a3 on which an image layer has been formed so that a chlorinated polypropylene resin (DICTP-06) has a thickness of about 1 μm as an adhesive layer a5. And dried at a temperature of 60 ° C. with a drying apparatus b8.

  The decorative film A on which a digital image was formed as described above and a decorative molded product (polypropylene, thickness 3 mm) were faced to each other, and heated and pressurized at a temperature of 180 ° C. to peel off the base film a1.

  The digital image was uniformly transferred on the polypropylene molded article without any transfer omission or foil burrs. The transferred image was free from image distortion such as ink crushing and bleeding, and the adhesion to the decorative molded product was good. Further, the surface of the transfer image is provided with a surface treatment layer a1, and even if the surface is rubbed, the image is not destroyed. In addition, the ink did not discolor even when exposed outdoors. Furthermore, the water resistance was also good.

Example 4
A 25 μm thick PET film (FE2000 manufactured by Futamura Chemical Co., Ltd.), which is the base film a1, is sent out from the unwinding device b1, and a modified acrylic resin (Daiichi Seisaku acrylic resin TMR800) is used as a surface treatment layer a2 on one side of the base film a1. The film was applied with a gravure roll coater used as the coating head b1 so as to have a film thickness of 0.7 μm, and dried at a temperature of 60 ° C. with a drying apparatus b3.

  Then, as a digital anchor layer a3, a resin and a resin for digital anchor layer a3 (Takamatsu oil and fat salt vinegar biacrylic resin NS-625XC) mixed with a lubricant and a vinyl vinegar resin are applied with a gravure roll coater using as a digital print head b4. The film thickness after drying was 5 μm.

  Next, on the digital anchor layer a3, a reverse image of a desired image is formed with the digital printing ink a4 in the LX900 manufactured by Nihon Electronics Industry used as the digital print head b4. At this stage, there is no ink trace or bleeding. A clear image could be formed.

  Thereafter, a gravure roll used as the coating head b7 on the digital anchor layer a3 on which the image layer is formed so that a thickness of about 1 μm of chlorinated polypropylene resin (Daiichi Seika TMR2660) is formed as the adhesive layer a5. It apply | coated with the coater and it dried at the temperature of 60 degreeC with drying apparatus b8.

  The decorative film A on which a digital image is formed as described above and a decorative molded product (aluminum molded product, thickness 1.5 mm) are faced to each other, and heated and pressurized at a temperature of 180 ° C. to form a base film a1. Was peeled off.

  On the aluminum molded product, there was no transfer omission and foil burrs, and the digital image was transferred uniformly. The transferred image was free from image distortion such as ink crushing and bleeding, and the adhesion to the decorative molded product was good. Further, the surface of the transfer image is provided with a surface treatment layer a1, and even if the surface is rubbed, the image is not destroyed. In addition, the ink did not discolor even when exposed outdoors. Furthermore, the water resistance was also good.

(Example 5)
An OPP film (made by Futamura Chemical Co., Ltd.) having a thickness of 30 μm, which is a base film a1, is sent out from an unwinding device b1, and a modified acrylic resin (Daiichi Seika acrylic resin TMR800) is formed as a surface treatment layer a2 on one side of the base film a1. It was coated with a gravure roll coater used as the coating head b1 so as to have a thickness of 0.7 μm, and dried at a temperature of 60 ° C. with a drying apparatus b3.

  Then, as a digital anchor layer a3, a resin and a resin for digital anchor layer a3 (Takamatsu oil and fat salt vinegar biacrylic resin NS-625XC) mixed with a lubricant and a vinyl vinegar resin are applied with a gravure roll coater using as a digital print head b4. The film thickness after drying was 5 μm.

  Next, on the digital anchor layer a3, a reverse image of a desired image is formed with the digital printing ink a4 in the LX900 manufactured by Nihon Electronics Industry, which is used as the digital print head b4. Could be formed.

  After that, on the digital anchor layer a3 on which the image layer is formed, a gravure roll coater used as the coating head b7 so that a vinyl acrylic resin (Seiko Advance VIC800) as the adhesive layer a5 has a thickness of about 1 μm. And dried at a temperature of 60 ° C. with a drying apparatus b8.

  The decorative film A on which a digital image was formed as described above and the decorative molded product (golf ball) were faced, and heated and pressurized at a temperature of 100 ° C. to peel off the base film a1.

  On the golf ball, there was no transfer omission or foil burr, and the digital image was transferred uniformly. The transferred image was free from image distortion such as ink crushing and bleeding, and the adhesion to the decorative molded product was good. Further, the surface of the transfer image is provided with a surface treatment layer a1, and even if the surface is rubbed, the image is not destroyed. In addition, the ink did not discolor even when exposed outdoors. Furthermore, the water resistance was also good.

(Example 6)
A 50 μm-thick PET film (Teijin G2) as the base film a1 is sent out from the unwinding device b1, and a modified acrylic resin (Daiichi Seikatsu acrylic resin TMFHK111) is formed as a surface treatment layer a2 on one side of the base film a1. It was applied with a gravure roll coater used as the coating head b1 so as to have a thickness of 0.7 μm, and dried at a temperature of 60 ° C. with a drying apparatus b3.

  Then, as a digital anchor layer a3, a resin and a resin for digital anchor layer a3 (Takamatsu oil and fat salt vinegar biacrylic resin NS-625XC) mixed with a lubricant and a vinyl vinegar resin are applied with a gravure roll coater using as a digital print head b4. The film thickness after drying was 5 μm.

  Next, on the digital anchor layer a3, a reverse image of a desired image is formed with the digital printing ink a4 in the LX900 manufactured by Nihon Electronics Industry used as the digital print head b4. At this stage, there is no ink trace or bleeding. A clear image could be formed.

  After that, on the digital anchor layer a3 on which the image layer is formed, a chlorinated polypropylene as an adhesive layer a5 is applied with a gravure roll coater used as a coating head b7 so as to have a thickness of about 1 μm, and dried. It dried at the temperature of 60 degreeC with the apparatus b8.

  The decorative film A on which a digital image was formed as described above was mounted in an injection mold, and after the polypropylene resin was injected and molded, the molded product was taken out of the mold and the base film a1 was peeled off.

  The digital image was uniformly transferred on the polypropylene molded article without any transfer omission or foil burrs. The transferred image was free from image distortion such as ink crushing and bleeding, and the adhesion to the decorative molded product was good. Further, the surface of the transfer image is provided with a surface treatment layer a1, and even if the surface is rubbed, the image is not destroyed. In addition, the ink did not discolor even when exposed outdoors. Furthermore, the water resistance was also good.

(Comparative Example 1)
The comparative example 1 set it as the structure which does not put a lubricant in the digital anchor layer a3 in Example 1, and obtained the decorating film through the same structure and process after that. The decorative film of Comparative Example 1 could not form an image because the blanket was inked during digital printing.

(Comparative Example 2)
In Comparative Example 2, a known aqueous coating solution was applied to the digital anchor layer a3 in Example 3 with the same thick film as in Example 3, and thereafter, a decorative film was obtained through the same configuration and steps. In Comparative Example 2, when the decorative film was transferred to the molded product, there were many foil burrs, and the digitally printed image dropped out even when water was applied to the adhesive and lowered water resistance.

  As is apparent from the above description, the molded product decorative film A of the present invention has a suitable configuration using an oily resin, so that the close contact between the digital printed image and the molded product is good, and the surface of the printed image is further improved. Excellent physical properties. Further, according to the present invention, since a digital print image can be formed on the digital anchor layer a3 without requiring plate making and color matching as in analog printing, the molded product can be added reliably, at low cost and with short delivery time. The decorative film A can be obtained. Furthermore, since the molded product decorative film A of the present invention does not require printing plate cleaning, it is excellent in terms of environment in which industrial waste can be reduced.

A molded article decorative film a1 base film a2 surface treatment layer a3 digital anchor layer a4 digital printing ink a5 adhesive layer B decorative film manufacturing equipment b1 unwinding device b2 coating head b3 drying device b4 digital printing head b5 silk printing head b6 Drying device b7 Coating head b8 Drying device b9 Winding device

The present invention, in order to achieve the above object, on one side of the base film, the digital printing at least on the surface treatment layer digital anchor layer for fixing the digital printing ink through the substrate film side It is a molded article decorative film on which an image layer made of ink is formed, and the digital anchor layer mainly contains an oil-based resin and contains a lubricant made of synthetic wax or petroleum wax . .

According to the present invention, the digital anchor layer contains an oily resin as a main component and contains a lubricant made of synthetic wax or petroleum wax, so that an oily digital print image can be reliably formed on the base film, It is possible to obtain a molded product decorative film having good adhesion between the image layer and the molded product and having excellent surface properties of the printed image.

Then, as a digital anchor layer a3, a resin for a digital anchor layer a3 (DIC vinyl chloride biacrylic resin TA04) in which a lubricant and a vinyl chloride modified acrylic resin are mixed is applied with a gravure roll coater using a digital print head b4 and dried. The subsequent film thickness was 2 μm.

Then, as a digital anchor layer a3, a resin for a digital anchor layer a3 (DIC vinyl chloride biacrylic resin TA04) in which a lubricant and a vinyl chloride modified acrylic resin are mixed is applied with a gravure roll coater using a digital print head b4 and dried. The subsequent film thickness was 2 μm.

Then, as a digital anchor layer a3, a resin for a digital anchor layer a3 (Takamatsu oil and fat salt vinyl acrylate resin NS-625XC) in which a lubricant and a vinyl chloride modified acrylic resin are mixed is applied with a gravure roll coater using a digital print head b4. The film thickness after drying was 5 μm.

Then, as a digital anchor layer a3, a resin for a digital anchor layer a3 (Takamatsu oil and fat salt vinyl acrylate resin NS-625XC) in which a lubricant and a vinyl chloride modified acrylic resin are mixed is applied with a gravure roll coater using a digital print head b4. The film thickness after drying was 5 μm.

Then, as a digital anchor layer a3, a resin for a digital anchor layer a3 (Takamatsu oil and fat salt vinyl acrylate resin NS-625XC) in which a lubricant and a vinyl chloride modified acrylic resin are mixed is applied with a gravure roll coater using a digital print head b4. The film thickness after drying was 5 μm.

Then, as a digital anchor layer a3, a resin for a digital anchor layer a3 (Takamatsu oil and fat salt vinyl acrylate resin NS-625XC) in which a lubricant and a vinyl chloride modified acrylic resin are mixed is applied with a gravure roll coater using a digital print head b4. The film thickness after drying was 5 μm.

As apparent from the above description, moldings decorative film A of the present invention, since a suitable configuration containing a lubricant comprising at Rutotomoni synthetic wax or petroleum wax used oil resin to the digital anchor layer a3, The adhesion between the digital printed image and the molded product is good, and the surface properties of the printed image are excellent. Further, according to the present invention, since a digital print image can be formed on the digital anchor layer a3 without requiring plate making and color matching as in analog printing, the molded product can be added reliably, at low cost and with short delivery time. The decorative film A can be obtained. Furthermore, since the molded product decorative film A of the present invention does not require printing plate cleaning, it is excellent in terms of environment in which industrial waste can be reduced.

Claims (7)

  A molded article decorative film in which an image layer of a digital printing ink is formed on a digital anchor layer on at least one surface of the base film from the base film side through a surface treatment layer, the digital anchor layer Is a molded product decorative film characterized by comprising an oil-based resin as a main component.   The surface treatment layer is made of a resin excellent in transparency, scratch resistance, light resistance, and water resistance, and has a film thickness of 0.2 to 0.9 µm. the film.   The molded article decorative film according to claim 1 or 2, wherein at least a transfer release layer is formed on the surface treatment layer, and the transfer release layer is formed from an oil-based coating liquid.   The digital anchor layer is made of a porous material containing a lubricant and a binder. The binder contains 1 to 20% by mass of a thermoplastic resin based on the total solid content, and an oily system having a glass transition point (Tg) of 5 to 40 ° C. The molded article decorative film according to any one of claims 1 to 3, wherein the decorative film is made of a coating solution and has a thickness of 2 to 5 µm.   It is a manufacturing method of the molded article decorative film in any one of Claims 1-4, Comprising: In an in-line process, a surface treatment layer and a digital anchor layer are laminated | stacked one by one on a base film in order, and this digital printing machine WHEREIN: A method for producing a decorative film for molded article, comprising: forming a reverse printed image with a digital printing ink on a digital anchor layer; and then applying an adhesive.   It is a manufacturing apparatus of the molded article decoration film in any one of Claims 1-4, Comprising: Coating which coats a surface treatment layer and a digital anchor layer on lamination | stacking with respect to the strip | belt-shaped base film sent out A head, a digital print head for forming an image layer using a digital printing ink on the digital anchor layer, and a coating head for applying an adhesive on the image layer; A production facility for a decorative decorative film, characterized in that it is arranged on one side to form one line.   It is characterized by decorating a molded product using the molded product decorative film according to any one of claims 1 to 4 by any one of a thermal transfer method, an in-mold transfer method, a vacuum / pressure forming method, and a simultaneous molding method. Molded decorations to do.

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