Polyvinyl chloride film and multilayered film

Abstract

To provide a polyvinyl chloride film excellent in weatherability and transparency and to provide a multilayered film using the polyvinyl chloride film.SOLUTION: There is provided a polyvinyl chloride film which contains a polyvinyl chloride, a plasticizer and an ultraviolet absorber and has a thickness of 50 μm or more, wherein the plasticizer is an ester compound having no aromatic ring, the ultraviolet absorber is a compound which is solid at 20°C and contains a 2,4,6-triphenyl-1,3,5-triazine skeleton and has a molecular structure in which only one hydroxyl group is bonded to the skeleton and 0.5 pt.wt. or more and 3 pts.wt. or less of the ultraviolet absorber is blended based on 100 pts.wt. of the polyvinyl chloride.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a polyvinyl chloride film and a multilayer film.

Background Art

[0002] Conventionally, for decoration and protection, a decorative film has been attached to the surface of a base material. As the decorative film, a multilayer film formed by laminating at least one resin film, a design layer, and an adhesive layer or an adhesive layer is widely used, and a transparent film for protecting the design layer may be disposed on the outermost surface of the multilayer film. As this transparent film, a polyvinyl chloride film may be used.

[0003] An ultraviolet absorber may be blended in the polyvinyl chloride film in order to prevent deterioration by ultraviolet rays (see, for example, Patent Documents 1 to 3).

[0004] Patent Document 1 discloses a vinyl chloride resin composition containing, as component (A), 0.01 to 10.0 parts by mass of an organic acid zinc salt, as component (B), 0.01 to 10.0 parts by mass of a β-diketone compound, and as component (C), one or more triazine compounds having a specific molecular structure in an amount of 0.01 to 20.0 parts by mass with respect to 100 parts by mass of the vinyl chloride resin.

[0005] Patent Document 2 discloses a decorative sheet in which a base material layer, a metal thin film layer, and an adhesive layer are laminated and integrated in this order, and the base material layer contains 100 parts by weight of a vinyl chloride resin, 0.02 to 5 parts by weight of a hindered amine light stabilizer having one or more triazine skeletons and two or more specific piperidine ring structures and having a number average molecular weight of 500 or more, and 0.01 to 0.1 parts by weight of a triazine-based ultraviolet absorber.

[0006] Patent Document 3 discloses a decorative material in which a base material, an adhesive layer, and a top film are laminated in this order. The base material is made of an acrylonitrile-butadiene-styrene copolymer resin. The adhesive layer is a cured product of an adhesive composition containing an acrylic adhesive and an epoxy curing agent. The top film contains polyvinyl chloride and an ultraviolet absorber, and the content of the ultraviolet absorber is 0.1 to 5 parts by weight with respect to 100 parts by weight of the polyvinyl chloride. A benzophenone-based ultraviolet absorber and a benzotriazole-based ultraviolet absorber are exemplified as the ultraviolet absorber.

[0007] In addition, an ultraviolet absorber is also blended into the resin film constituting the multilayer film. Patent Document 4 discloses a decorative sheet having a base material layer, a transparent resin layer, and a surface protection layer in this order, wherein at least one of the base material layer and the transparent resin layer is composed of a resin composition containing a resin having an ultraviolet absorption wavelength of at least 360 to 380 nm, and the absorbance A at a wavelength of 360 to 380 nm of the surface protection layer, measured in accordance with JIS K0115:2004 11 is more than 0.1, and the absorbance A at a wavelength of 360 to 380 nm of the transparent resin layer and the surface protection layer 12 is more than 0.3. It is described that a triazine-based ultraviolet absorber is included in at least one of the transparent resin layer and the surface protection layer.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0009] By the way, in order to utilize the decorative film for outdoor applications, the decorative film has been required to have weather resistance that can withstand long-term use. For this reason, there is a demand for a polyvinyl chloride film used as a transparent film disposed on the outermost surface of a multilayer film to have weather resistance and transparency superior to those of conventional ones.

[0010] The present invention has been made in view of the above circumstances, and an object thereof is to provide a polyvinyl chloride film excellent in weather resistance and transparency, and a multilayer film using the polyvinyl chloride film.

Means for Solving the Problems

[0011] The polyvinyl chloride film of the present invention is a polyvinyl chloride film containing polyvinyl chloride, a plasticizer, and an ultraviolet absorber, having a thickness of 50 μm or more, wherein the plasticizer is an ester compound not containing an aromatic ring, and the ultraviolet absorber is a compound having a molecular structure containing a 2,4,6-triphenyl-1,3,5-triazine skeleton and having only one hydroxyl group bonded to the skeleton and being solid at 20 °C, and 0.5 part by weight or more and 3 parts by weight or less of the ultraviolet absorber is blended with respect to 100 parts by weight of the polyvinyl chloride.

[0012] The ultraviolet absorber is preferably 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-[2-(2-ethylhexanoyloxy)ethoxy]phenol or 2-[4,6-bis(1,1'-biphenyl-4-yl)-1,3,5-triazin-2-yl]-5-[(2-ethylhexyl)oxy]phenol.

[0013] In the polyvinyl chloride film of the present invention, it is preferable that 15 parts by weight or more and 50 parts by weight or less of the plasticizer is blended with respect to 100 parts by weight of the polyvinyl chloride.

[0014] The polyvinyl chloride film of the present invention preferably further contains an acrylic resin containing an epoxy group.

[0015] The polyvinyl chloride film of the present invention preferably has a thickness of 300 μm or less.

[0016] The multilayer film of the present invention is a multilayer film including an adhesive layer and a resin film, characterized in that the above polyvinyl chloride film is disposed on the outermost surface.

Effects of the Invention

[0017] According to the present invention, it is possible to provide a polyvinyl chloride film excellent in weather resistance and transparency, and a multilayer film using the polyvinyl chloride film.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0019] The polyvinyl chloride film of the present invention is a polyvinyl chloride film containing polyvinyl chloride, a plasticizer, and an ultraviolet absorber, having a thickness of 50 μm or more, wherein the plasticizer is an ester compound not containing an aromatic ring, the ultraviolet absorber has a molecular structure containing a 2,4,6-triphenyl-1,3,5-triazine skeleton and having only one hydroxyl group bonded to the skeleton, and is a solid compound at 20 °C, and 0.5 parts by weight or more and 3 parts by weight or less of the ultraviolet absorber is blended with respect to 100 parts by weight of the polyvinyl chloride.

[0020] <Polyvinyl Chloride (PVC)> As the above polyvinyl chloride, for example, a homopolymer of vinyl chloride is preferably used, and it may also be a copolymer of vinyl chloride and other monomers.

[0021] Examples of the above other monomers include vinyl esters such as vinyl acetate and vinyl propionate; olefins such as ethylene, propylene, and styrene; (meth)acrylic acid esters such as methyl acrylate, ethyl acrylate, and methyl methacrylate; maleic acid diesters such as dibutyl maleate and diethyl maleate; fumaric acid diesters such as dibutyl fumarate and diethyl fumarate; vinyl cyanides such as acrylonitrile and methacrylonitrile; vinyl halides such as vinylidene chloride and vinyl bromide; and vinyl ethers such as methyl vinyl ether and ethyl vinyl ether. These may be used alone or in combination of two or more. The content of the copolymer of the above other monomers is usually 50% by weight or less, preferably 10% by weight or less. If it exceeds 50% by weight, the flex resistance of the polyvinyl chloride film may decrease.

[0022] The average degree of polymerization of polyvinyl chloride is not particularly limited and is adjusted according to the required hardness of the film and the amount of plasticizer used for hardness adjustment. For example, it is set to 800 to 1300. The preferred upper limit of the above average degree of polymerization is 1050. When the average degree of polymerization is within the range of 800 to 1300, the moldability at a relatively low temperature is particularly good. On the other hand, if the average degree of polymerization is less than 800, it may be difficult to maintain the embossed shape during molding. On the other hand, if the average degree of polymerization exceeds 1300, the followability to the surface shape of the substrate may be insufficient.

[0023] <Plasticizer> The above plasticizer is not particularly limited as long as it is an ester compound (aliphatic ester) that does not contain an aromatic ring, and those conventionally blended with polyvinyl chloride can be used. By blending an aliphatic ester, a flexible film with good elongation and difficult to break can be obtained while ensuring weather resistance. As a result, it is easy to form into a film shape, and excellent followability to the surface shape of the base material can be obtained even when pasting on the base material. On the other hand, when an ester compound containing an aromatic ring (aromatic ester) such as a phthalic acid ester containing a benzene ring is used, the light absorption is large due to the influence of conjugated double bonds, and sufficient weather resistance cannot be obtained.

[0024] The aliphatic ester may be an acyclic aliphatic ester or a cyclic aliphatic ester (alicyclic ester). As the acyclic aliphatic ester, for example, an adipic acid ester or a polyester in which adipic acid is bonded to a polyalcohol is preferably used. As the alicyclic ester, for example, a cyclohexane-based carboxylic acid ester is preferably used.

[0025] The number average molecular weight of the plasticizer is preferably 350 to 3000. If the number average molecular weight is less than 350, the plasticizer may bleed to the film surface. On the other hand, if the number average molecular weight exceeds 3000, the effect of softening the film by adding the plasticizer cannot be sufficiently obtained, and the polyvinyl chloride film may become too hard, resulting in a possible decrease in workability. The molecular weight of the plasticizer is preferably 420 or more.

[0026] The content of the plasticizer in the polyvinyl chloride film is preferably 10 to 80 parts by weight with respect to 100 parts by weight of polyvinyl chloride. If the above content is less than 10 parts by weight, the polyvinyl chloride film may become too hard, resulting in a possible decrease in workability. If the above content exceeds 80 parts by weight, the plasticizer may bleed (float) to the film surface. A more preferable lower limit of the content is 15 parts by weight, and a more preferable upper limit of the content is 50 parts by weight.

[0027] <Ultraviolet absorber> The above ultraviolet absorber is a solid compound at 20 °C, having a molecular structure containing a 2,4,6-triphenyl-1,3,5-triazine skeleton and with only one hydroxyl group bonded to the above skeleton. By containing the 2,4,6-triphenyl-1,3,5-triazine skeleton, it is possible to improve the weather resistance compared to the case of using benzophenone-based ultraviolet absorbers or benzotriazole-based ultraviolet absorbers. Also, since there is only one hydroxyl group bonded to the above skeleton, there is less steric hindrance, and high compatibility with polyvinyl chloride can be ensured. If the compatibility with polyvinyl chloride is not sufficient, the transparency of the film will decrease, or bleed-out (precipitation) on the film surface will occur, causing a decrease in adhesion characteristics and laminating properties. Also, if a liquid ultraviolet absorber is used, bleed-out will occur, so a solid compound is used. The melting point of the above ultraviolet absorber is preferably lower than the temperature during melt-kneading of the raw material of the polyvinyl chloride film. Specifically, it is preferably 100 to 130 °C. Also, the above ultraviolet absorber is preferably in powder form at 20 °C.

[0028] Preferred examples of the ultraviolet absorber include 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-[2-(2-ethylhexanoyloxy)ethoxy]phenol shown in the following chemical formula (1), and 2-[4,6-bis(1,1'-biphenyl-4-yl)-1,3,5-triazin-2-yl]-5-[(2-ethylhexyl)oxy]phenol shown in the following chemical formula (2).

[0029]

Chemical formula

[0030]

Chemical formula

[0031] The content of the ultraviolet absorber in the polyvinyl chloride film is 0.5 parts by weight or more and 3 parts by weight or less with respect to 100 parts by weight of polyvinyl chloride. If the above content is less than 0.5 parts by weight, sufficient weather resistance cannot be obtained. If the above content exceeds 3 parts by weight, the ultraviolet absorber may migrate to the surface of the polyvinyl chloride film and bleed out. When bleeding out occurs, the transparency and adhesive properties of the polyvinyl chloride film will deteriorate.

[0032] <Epoxy group-containing resin> The polyvinyl chloride film may further contain an epoxy group-containing resin. By blending an epoxy group-containing resin, the processability of the polyvinyl chloride film can be improved. As the epoxy group-containing resin, for example, an epoxy group-containing acrylic resin is preferably used. In addition, it is preferable that the polyvinyl chloride film does not contain epoxy group-containing soybean oil (epoxidized soybean oil). When it contains epoxy group-containing soybean oil, it is preferably 1 part by weight or less with respect to 100 parts by weight of polyvinyl chloride. If epoxy group-containing soybean oil is contained, the weather resistance and adhesive properties of the polyvinyl chloride film may deteriorate.

[0033] The polyvinyl chloride film may contain other additives such as an anti-shrinkage agent, a stabilizer, a colorant (pigment), a foaming agent, a lubricant, a modifier, a filler, a diluent, etc. as required. As these additives, those generally blended with polyvinyl chloride can be used.

[0034] The polyvinyl chloride film can be formed into a film shape by a conventionally known forming method such as calendering, extrusion molding, injection molding, etc. The thickness of the polyvinyl chloride film is set to 50 μm or more. If the above thickness is less than 50 μm, the strength of the film itself is insufficient, and sufficient durability and weather resistance cannot be obtained. The above polyvinyl chloride film preferably has a thickness of 300 μm or less. When the above thickness exceeds 300 μm, the firmness of the film is too strong, and there is a risk that it will be difficult to attach it to the base material. Also, if the amount of the ultraviolet absorber is not increased according to the above thickness, there is a risk that the effect of improving the weather resistance cannot be sufficiently obtained. However, if the amount of the ultraviolet absorber increases, the ultraviolet absorber may migrate to the surface of the polyvinyl chloride film and bleed out.

[0035] The above polyvinyl chloride film may have embossing on its surface. Embossing is to press a mold against the film surface to impart an embossed shape (concave-convex shape). Since the above polyvinyl chloride film has good moldability at a relatively low temperature (about 130°C), it is suitable for embossing, and the quality such as weather resistance does not deteriorate due to embossing. Embossing may be performed on the entire surface of the film or partially. The designability of the above polyvinyl chloride film can be changed according to the specifications of the embossing.

[0036] The polyvinyl chloride film of the present invention may be used as a single-layer film or as part of a multi-layer film. The polyvinyl chloride film of the present invention can be integrated with other films through an adhesive layer or by lamination. As the multi-layer film containing the above polyvinyl chloride film, those in which the above polyvinyl chloride film is arranged on the outermost surface are preferably used.

[0037] The multilayer film of the present invention is a multilayer film including an adhesive layer and a resin film, characterized in that the polyvinyl chloride film is disposed on the outermost surface. According to the multilayer film of the present invention, since the outermost surface is constituted by a polyvinyl chloride film excellent in weather resistance and transparency, it is possible to protect the color and pattern of the design layer provided in a layer lower than the polyvinyl chloride film without impairing them. Therefore, it is possible to realize a high-quality decorative film excellent in weather resistance applicable to outdoor use.

[0038] FIG. 1 is a cross-sectional view schematically showing an example of the multilayer film of the present invention. The multilayer film 21 shown in FIG. 1 has a structure in which the polyvinyl chloride film (top film) 10, the adhesive layer 12, the design layer 14, the resin film (base film) 16, and the adhesive layer 18 are laminated in this order, and is attached to the base material 50 by the adhesive layer 18.

[0039] The adhesive layer 12 may be an adhesive layer formed of an adhesive, or may be an adhesive layer formed of a cured product of an adhesive. As the adhesive, for example, an acrylic adhesive, a rubber adhesive, a silicone adhesive, or the like can be used.

[0040] The design layer 14 is not particularly limited as long as it is a layer in which a design to be imparted to the multilayer film is formed. For example, it may be a printed layer formed by printing, or may be a vapor deposition layer formed by vapor depositing a metal or the like. The type of the design is not particularly limited, and any color and pattern can be imparted.

[0041] The printing method for forming the printed layer is not particularly limited, and examples thereof include inkjet printing and gravure printing. Specific examples of inkjet printing include a method of discharging a vinyl chloride-vinyl acetate copolymer·acrylic ink onto the base film 16 by an inkjet printer. Specific examples of gravure printing include a method of using a one-component curable ink or a two-component curable ink.

[0042] The design layer 14 may cover the entire surface of the base film 16, or may partially cover it. For example, when the printing layer has a planar shape corresponding to any pattern, information, etc., it will partially cover the surface of the base film 16. Further, a surface treatment may be applied to the surface of the base film 16 to improve the fixing property of the design.

[0043] The resin film (base film) 16 is a layer serving as a base on which the design layer 14 is formed. The base film 16 preferably contains polyvinyl chloride. The polyvinyl chloride in the base film 16 may be the same as or different from the vinyl chloride resin in the top film 10 in terms of composition, average molecular weight, etc.

[0044] The base film 16 preferably contains a plasticizer. The plasticizer in the base film 16 may be the same as or different from the plasticizer in the top film 10 in terms of composition, content, number average molecular weight, etc. Since the top film 10 and the base film 16 are laminated, it is preferably basically the same hardness. Therefore, if the top film 10 and the base film 16 have the same thickness, it is preferable that the content of the plasticizer is also the same.

[0045] The base film 16 may contain additives such as an anti-thermal shrinkage agent, a stabilizer, a coloring agent (pigment), a foaming agent, a lubricant, a modifier, a filler, a diluent, etc. as necessary. As these additives, those generally blended with polyvinyl chloride can be used, and they may be the same as or different from the additives in the top film 10. Note that, unlike the top film 10, the base film 16 may not contain an ultraviolet absorber.

[0046] The base film 16 can be formed into a film shape by a conventionally known molding method such as calender molding, extrusion molding, injection molding, etc. The thickness of the base film 16 is not particularly limited, and is, for example, 50 to 300 μm.

[0047] The adhesive layer 18 may be an adhesive layer formed of an adhesive, or may be an adhesive layer formed of a cured product of an adhesive, similar to the adhesive layer 12. As the adhesive, for example, an acrylic adhesive, a rubber-based adhesive, a silicone-based adhesive, or the like can be used.

[0048] The material of the base material 50 is not particularly limited, and examples thereof include resins such as polycarbonate resins, acrylic resins, and styrene resins, acrylonitrile-butadiene-styrene copolymers (ABS resins); metals such as iron, copper, and aluminum; alloys, and the like. Further, the shape of the base material 50 is not particularly limited, and for example, it may be flat or may have a three-dimensional curved surface. By using polyvinyl chloride as the top film 10 and the base film 16, it is possible to produce a multilayer film 21 that is flexible and has excellent coating properties that are less likely to break due to stretching.

[0049] Further, FIG. 1 shows a state where the multilayer film is attached to the base material 50. Before attachment to the base material 50, a separator is usually attached to the surface of the adhesive layer 18. The separator may be peeled off immediately before attachment to the base material 50. By providing a separator, it is possible to prevent the adhesive layer 18 from being exposed during the production, transportation, and storage of the multilayer film, thereby preventing deterioration of the adhesive layer 18 and improving the handleability of the multilayer film.

[0050] The separator is not particularly limited, and those that can be easily peeled off without damaging the adhesive layer 18 are preferable. For example, polyester, polyvinyl chloride, polyvinylidene chloride, polyethylene terephthalate, polypropylene, or the like, which has been subjected to an easy-peeling treatment by applying a silicone resin, a fluororesin, or the like to the surface in contact with the adhesive layer 18 (release film); paper such as high-quality paper and glassine paper (release paper); multilayer films of paper and a coating layer, and the like.

[0051] Figure 2 is a cross-sectional view schematically showing another example of the multilayer film of the present invention. The multilayer film 22 shown in Figure 2 has a structure in which the polyvinyl chloride film (top film) 10, the design layer 14, the resin film (base film) 16, and the adhesive layer 18 are laminated in this order, and is attached to the base material 50 by the adhesive layer 18. That is, the multilayer film 22 in Figure 2 is different from the multilayer film 21 in Figure 1 in that the top film 10 and the design layer 14 are laminated without passing through the adhesive layer 12. The multilayer film 22 in Figure 2 can be produced by using a method such as thermally laminating the top film 10 on the design layer 14.

[0052] The use of the multilayer film of the present invention is not particularly limited, but from the viewpoint of taking advantage of the excellent weather resistance obtained by using the polyvinyl chloride of the present invention as the top film 10, it is suitable for outdoor applications such as signboards installed outdoors; exterior finishes of vehicles such as railways and automobiles; building materials such as entrance doors, window frames, and eaves; and exterior structures of buildings such as fences for blinds. Further, according to the multilayer film of the present invention, designability equivalent to that of painted products can be obtained by a simpler and safer method than painting.

Examples

[0053] Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples only.

[0054] <Example 1> To 100 parts by weight of polyvinyl chloride with an average degree of polymerization of 1000, 25 parts by weight of an aliphatic linear high molecular weight polyester (manufactured by ADEKA, "PN-7535") as a plasticizer, 1 part by weight of 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-[2-(2-ethylhexanoyloxy)ethoxy]phenol (manufactured by ADEKA, "ADEKA STAB LA-46") as an ultraviolet absorber, 3 parts by weight of an epoxy group-containing acrylic resin (manufactured by Mitsubishi Chemical Corporation, "Metablen P-1901"), 0.1 part by weight of a silica compound (manufactured by Tokuyama Corporation, "Fine Seal B"), 0.1 part by weight of hydrotalcite (manufactured by Kyowa Chemical Industry Co., Ltd., "MAGCELER 1"), 1.5 parts by weight of an acrylic processing aid (manufactured by Mitsubishi Chemical Corporation, "Metablen P-530"), and 4 parts by weight of a barium-zinc-based heat stabilizer (manufactured by ADEKA, "ADEKA STAB AC-258") were added to obtain a PVC compound. The obtained PVC compound was melt-kneaded at 180°C for 10 minutes using a twin-screw roll and then subjected to calender molding to form a sheet with a thickness of 70 μm to produce a polyvinyl chloride film.

[0055] <Examples 2 to 12> As shown in Table 1 below, a polyvinyl chloride film was produced in the same manner as in Example 1, except that the types and blending amounts of the plasticizer, ultraviolet absorber, and epoxy compound (epoxy group-containing acrylic resin or epoxidized soybean oil) were adjusted to change the composition of the PVC compound.

[0056] <Comparative Examples 1 to 11> As shown in Table 2 below, a polyvinyl chloride film was produced in the same manner as in Example 1, except that the composition of the PVC compound or the thickness of the polyvinyl chloride film was changed.

[0057] <Evaluation Test> The polyvinyl chloride films produced in the examples and comparative examples were evaluated as follows: (1) Weather resistance; (2) Heat resistance; (3) Tensile strength. The results are shown in Tables 1 and 2 below.

[0058] (1) Weather resistance The polyvinyl chloride film was placed in an accelerated weathering tester (metal weather meter) for 500 hours and irradiated with light. The chromaticity of the polyvinyl chloride film before irradiation, after 300 hours of irradiation, and after 500 hours of irradiation was measured with a color difference meter, and the degree of color change was determined based on the color difference Δb from before irradiation. (Judgment Criteria) ◎: Δb value is 5 or less 〇: Δb value is greater than 5 and 10 or less ×: Δb value is greater than 10 and 20 or less ××: Δb value is greater than 20

[0059] (2) Transparency The haze (yellowness index: YI value) of the polyvinyl chloride film was measured. (Judgment Criteria) 〇: YI value is less than 5 ×: YI value is 5 or more

[0060] (3) Bleed-out The polyvinyl chloride film was left in an environment of 50 °C and 90% RH for 1 month, and the degree of exudation (precipitation state) on the surface was visually confirmed. (Judgment Criteria) 〇: There is no exudation on the surface and the transparency has not changed. ×: There is exudation on the surface and the transparency has decreased.

[0061]

Table 1

[0062]

Table 2

[0063] In Tables 1 and 2 above, the unit of compounding amount "PHR" represents the number of parts by weight relative to 100 parts by weight of polyvinyl chloride. Also, the details of the plasticizer, ultraviolet absorber, and epoxy compound shown in Tables 1 and 2 above are as follows.

[0064] <Plasticizer> PN-7535: Manufactured by ADEKA, "ADEKA Sizer PN-7535" (aliphatic linear high molecular weight polyester) DINCH: Manufactured by BASF Japan, "Hexamoll® DINCH®" (alicyclic ester) PN-7160: Manufactured by ADEKA, "ADEKA Sizer PN-7160" (aliphatic linear low molecular weight polyester) DINP: Diisononyl phthalate (manufactured by J Plus) DOTP: Bis(2-ethylhexyl) terephthalate (manufactured by J Plus)

[0065] <UV Absorbent> LA-46: Manufactured by ADEKA, "ADEKA STAB LA-46" (the compound of the above chemical formula (1), melting point 106 - 108°C) 1413: Manufactured by ADEKA, "ADEKA STAB 1413" (benzophenone-based UV absorbent) Tinuvin 1600: Manufactured by BASF Japan, "Tinuvin® 1600" (the compound of the above chemical formula (2), melting point 120 - 130°C) LA-29: Manufactured by ADEKA, "ADEKA STAB LA-29" (benzotriazole-based UV absorbent) LAF-70: Manufactured by ADEKA, "ADEKA STAB LAF-70" (contains a 2,4,6-triphenyl-1,3,5-triazine skeleton and has a molecular structure with three hydroxyl groups bonded to the above skeleton)

[0066] <Epoxy Compound> P-1901: Manufactured by Mitsubishi Chemical, "Metablen P-1901" (acrylic resin containing epoxy groups) G-0150M: Manufactured by NOF Corporation, "Marprooff® G-0150M" (acrylic resin containing epoxy groups) O-130P: Manufactured by ADEKA, "ADEKA Sizer O-130P" (epoxidized soybean oil)

[0067] As can be seen from Table 1, the polyvinyl chloride films of Examples 1 to 12 were excellent in weather resistance and transparency, and no decrease in transparency due to bleed-out after standing in a high-humidity environment was observed. On the other hand, the polyvinyl chloride films of Comparative Examples 1 to 11 were evaluated as × or ×× in one or more of the evaluation results of weather resistance, transparency, and bleed-out, and did not have sufficient performance.

Explanation of Signs

[0068] 10 Polyvinyl chloride film 12, 18 Adhesive layer 14 Design layer 16 Resin film 21, 22 Multilayer film 50 Substrate

Claims

1. A polyvinyl chloride film containing polyvinyl chloride, a plasticizer, and an ultraviolet absorber, The thickness is 50 μm or more, The plasticizer is an ester compound that does not contain an aromatic ring, the ultraviolet absorber is a compound that is solid at 20° C. and has a molecular structure in which a 2,4,6-triphenyl-1,3,5-triazine skeleton is included and only one hydroxyl group is bonded to the skeleton; A polyvinyl chloride film, characterized in that the ultraviolet absorbing agent is blended in an amount of 0.5 parts by weight or more and 3 parts by weight or less per 100 parts by weight of the polyvinyl chloride.

2. The polyvinyl chloride film according to claim 1, characterized in that the ultraviolet absorber is 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-[2-(2-ethylhexanoyloxy)ethoxy]phenol or 2-[4,6-bis(1,1'-biphenyl-4-yl)-1,3,5-triazin-2-yl]-5-[(2-ethylhexyl)oxy]phenol.

3. 3. The polyvinyl chloride film according to claim 1, wherein the plasticizer is blended in an amount of 15 parts by weight or more and 50 parts by weight or less per 100 parts by weight of the polyvinyl chloride.

4. 4. The polyvinyl chloride film according to claim 1, further comprising an epoxy group-containing acrylic resin.

5. 5. The polyvinyl chloride film according to claim 1, having a thickness of 300 μm or less.

6. A multilayer film including an adhesive layer and a resin film, The polyvinyl chloride film according to any one of claims 1 to 5 is disposed on the outermost surface. A multilayer film characterized by:

Images