JP2015071720A - Resin film with coated film and resin film roll with coated film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin film with coated film capable of preventing reduction of a yield by appearance damage without deteriorating appearance of a coating face even when taken up in the form of a roll and a resin film roll with coated film obtained from the same.SOLUTION: There is provided a resin film with coated film having a curable coated film on a surface of a base material film and surface hardness of a surface of the base material film Rz of 6.0 or more.

Description

  The present invention is suitable for an adhesive film (tape) for industrial use, a decorative adhesive film (tape) such as a sticker, a label, a marking film, etc., or a decorative sheet, which is pasted to give design to a signboard or a car. It is related with the resin film with a coating film used for the laminated | multilayer film used for. In more detail, this invention relates to the resin film with a coating film which has a curable coating film.

  Conventionally, an adhesive film (tape) for industrial use, a sticker that is pasted to give design to a signboard or a car, a decorative adhesive film (tape) such as a label and a marking film, or a decorative sheet is colored. Films made of polyvinyl chloride resin having excellent properties, workability, scratch resistance, weather resistance, and the like have been frequently used. However, in recent years, there has been a demand for an alternative to a material with a small environmental load for reasons such as reduction of processing costs related to waste processing, and the use of polyolefin-based resins has been studied.

  JP-A-2006-142668 (Patent Document 1) discloses an adhesive film such as a marking film using a polyolefin-based resin as a base material. In the same document, it is excellent in scratch resistance, flexibility, curved surface followability, pasting workability, etc., and the demand for a film having excellent adhesion and followability between the base film and the coating layer. On the other hand, a film with a coating film is described in which an elastomer component is blended with a base material, and an acrylic-modified urethane coating film is further laminated on the base material to improve the above performance.

  Japanese Patent Application Laid-Open No. 8-72205 (Patent Document 2) discloses a film with a coating film having a coating film of an ultraviolet curable resin as a decorative sheet having excellent wear resistance and scratch resistance.

However, when the coating film is curable, when the film is wound into a roll, the surface of the coating film layer of the base film and the back surface of the base film (the surface on the side having no coating film) are in contact with each other. However, if it is wound into a roll with the coating film not sufficiently cured, the surface of the coating layer that is not sufficiently cured is affected by the surface shape on the back side of the base film. It hardened | cured and white blur etc. might generate | occur | produce on the surface of the coating-film layer.
As a result, when processing decorative films such as marking films, decorative adhesive films, industrial adhesive films, decorative sheets, etc., secondary processing is required for products and parts that require a particularly precise appearance. In this case, there is a problem that the surface of the coating layer is inferior and cannot be used.

JP 2006-142668 A JP-A-8-72205

  The present invention provides a resin film with a coating film and a resin film with a coating film capable of suppressing a decrease in yield due to appearance damage without losing the appearance of the coating film surface even when wound into a roll. The purpose is to provide a roll.

That is, the present invention
[1] A resin film with a coating film having a curable coating film on the surface of the substrate film, wherein the surface roughness Rz of the back surface of the substrate film is 6.0 or more. Resin film.
[2] The resin film with a coating film according to [1], wherein the surface roughness Ra of the back surface of the base film is 0.5 or more.
[3] The resin film with a coating film according to [1] or [2], wherein the base film contains a polyolefin resin.
[4] The resin film with a coating film according to [3], wherein the polyolefin-based resin contains a polypropylene-based thermoplastic elastomer produced by a multistage polymerization method.
[5] The resin film with a coating film according to [3] or [4], wherein the polyolefin-based resin has a tensile modulus of 100 to 1000 MPa.
[6] The resin film with a coating film according to any one of [1] to [5], wherein the curable coating film is a thermosetting coating film.
[7] A resin film roll with a coating film in which the resin film with a coating film according to any one of [1] to [6] is wound.
Is provided.

  Although the resin film with a coating film and the resin film roll with a coating film of the present invention have a curable coating film, white blur or the like is generated on the surface of the coating film layer even when the film is wound into a roll. Can be suppressed, and has an excellent appearance.

  Details of the present invention will be described below.

The resin film with a coating film of the present invention has a surface roughness Rz (the surface of the base film opposite to the surface of the base film on which the curable coating film is provided (hereinafter referred to as “front surface”) (hereinafter referred to as “the back surface”). It is important that the maximum height roughness) is 6.0 or more. The surface roughness Rz of the back surface of the base film is more preferably 6.4 or more, and more preferably 8.0 or more.
When the surface roughness Rz is 6.0 or more, when the film is rolled, the appearance of the surface of the coating layer does not become fuzzy even if the tightening pressure of the film to be wound is high, and the appearance is good. Yield can be improved.
Moreover, although the upper limit of Rz is not specified in particular, it is preferably 15.0 or less in consideration of the case where different layers are laminated in the subsequent step on the back surface of the base film.
The “surface roughness” as used in the present invention refers to that defined in JIS B0601 (2001).

The surface roughness Ra (arithmetic mean roughness) of the back surface of the base film of the resin film with a coating film of the present invention is preferably 0.5 or more. The surface roughness Ra of the back surface of the base film is more preferably 0.6 or more, and more preferably 0.7 or more.
When the surface roughness Ra is 0.5 or more, when the resin film with a coating film is made into a roll, the appearance of the surface on the coating film side is fluffy even if the tightening pressure of the film to be wound is relatively high. The appearance can be improved without increasing the yield.
The upper limit of Ra is not particularly specified, but is preferably 2.0 or less in consideration of the case where different layers are laminated in the subsequent step on the back surface of the base film.

<Polyolefin resin>
The base film preferably contains a polyolefin resin. The content of the polyolefin resin is preferably 40 to 100% by weight, and more preferably 50 to 100% by weight, based on the total weight of the resin components constituting the base film. By including the polyolefin resin, various performances such as followability to a curved surface are improved.

  Examples of the polyolefin resin used in the present invention include a polyethylene resin, a polypropylene resin, and a mixture thereof.

  Polyethylene resins include ethylene homopolymers, copolymers of ethylene as the main component with other monomers copolymerizable with ethylene (low density polyethylene (LDPE), high pressure low density polyethylene, linear Examples thereof include low density polyethylene (LLDPE), high density polyethylene (HDPE), ethylene-α-olefin copolymers (metallocene polyethylene, etc.) obtained by polymerization using a metallocene catalyst, and mixtures thereof.

Examples of the polypropylene resin include a propylene homopolymer (homopolypropylene), a propylene copolymer, a reactor type polypropylene thermoplastic elastomer, and a mixture thereof. Moreover, as a polypropylene resin used for this invention, a bending elastic modulus ("bending elastic modulus" as used in the present invention means what was obtained according to JISK7171) is 50-900 Mpa, Especially 100-700 Mpa is preferable. .
The propylene copolymer may be a random copolymer of propylene and ethylene or other α-olefin (random polypropylene), a block copolymer (block polypropylene), a block copolymer containing a rubber component, or a graft copolymer. Examples include coalescence. The other α-olefin copolymerizable with propylene is preferably one having 4 to 12 carbon atoms, such as 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 4 -Methyl-1-pentene, 1-decene, etc. are mentioned, The 1 type (s) or 2 or more types of mixture is used. Usually, the mixing ratio of the α-olefin is about 1 to 10% by weight with respect to propylene.

  Reactor-type polypropylene-based thermoplastic elastomers are produced by low-crystalline propylene homopolymers (such as Prime TPO manufactured by Prime Polymer Co., Ltd.) having a crystal melting heat (ΔH) of 100 g / J or less, or by a multistage polymerization method. And polypropylene-based thermoplastic elastomers (Cataloy manufactured by Sun Allomer Co., Ltd., Zelas manufactured by Mitsubishi Chemical Co., Ltd., WELNEX manufactured by Nippon Polypro Co., Ltd., etc.).

  The heat of crystal fusion (ΔH) is the crystal on the DSC chart when the resin is melted once above the melting point using a differential scanning calorimeter (DSC) and then cooled at a rate of 10 ° C./min. It is a value calculated from the peak area.

  In the present invention, the multi-stage polymerization method is a polymerization method in which a plurality of types of polymers can be continuously produced by performing multi-stage polymerization of two or more stages, rather than completing the polymerization once. This is a method completely different from the so-called normal polymer blend method in which a mixed resin composed of different kinds of polymers is obtained using a mechanical method. By this method, it is possible to produce a blend type copolymer resin at a molecular level. If such a polymerization method is adopted, for example, it is possible to contain up to about 80 to 95% by weight of the second component with respect to polypropylene, and for the first time to have the same physical properties as plasticized polyvinyl chloride resin. It becomes possible.

The polypropylene-based thermoplastic elastomer obtained by the multistage polymerization method is a copolymer obtained by multistage polymerization of (i) a hard segment and (ii) a soft segment in two or more stages in a reactor.
(I) As the hard segment, a propylene homopolymer block or a copolymer block of propylene and an α-olefin, for example, 2 such as propylene / ethylene, propylene / 1-butene, propylene / ethylene / 1-butene, etc. Examples include original or ternary copolymer blocks. (Ii) As the soft segment, an ethylene homopolymer block or a copolymer block of ethylene and α-olefin, such as ethylene / propylene, ethylene / 1-butene, ethylene / propylene / 1-butene, etc. Binary or ternary copolymer block of The polyolefin resin copolymerized by such a specific polymerization method is disclosed in, for example, Japanese Patent Laid-Open No. 4-224809, but as an actual commercial product, there is a product made by Sun Allomer (trade name = Cataloy). It is done.

In the present invention, among polypropylene-based thermoplastic elastomers produced by a multistage polymerization method, in particular, the melt flow rate (MFR) is 0.1 to 30, and the proportion of xylene solubles at 23 ° C. is 30 to 30. 75% by weight, preferably 40-60% by weight is preferred. Here, MFR is a value measured according to JISK7210. The proportion of xylene solubles is determined as follows.
1 g of sample is placed in 300 ml of xylene in an oil bath and dissolved at 140 ° C. with stirring. From 1 hour after the addition of the sample, the mixture of the sample and xylene is cooled to 100 ° C. within 1 hour while continuing to stir. Thereafter, the mixture of the sample and xylene is transferred to a quenching oil bath, rapidly cooled to 23 ° C. ± 2 ° C. while stirring, and kept at that temperature for 20 minutes or more. The resulting precipitate is removed by natural drying with filter paper. The filtrate is evaporated to dryness using an evaporator, and the resulting solid is dried under reduced pressure at 120 ° C. for 2 hours and then allowed to cool to room temperature. The solid content is measured to calculate the room temperature xylene solubles.

Also, other synthetic resins can be mixed with the polyethylene resin and / or the polypropylene resin. Examples of other resins to be mixed include diene rubbers (elastomers) such as isoprene rubber, butadiene rubber, butyl rubber, propylene-butadiene rubber, acrylonitrile-butadiene rubber, and acrylonitrile-isoprene rubber, ethylene-propylene copolymer rubber, and ethylene-propylene non-propylene rubber. Polyolefin thermoplastic elastomers other than the above reactor type polypropylene thermoplastic elastomers such as conjugated diene rubber and ethylene-butadiene copolymer rubber, and styrene-butadienes such as styrene-butadiene copolymer rubber (SBR) and styrene-butadiene block copolymers Styrene thermoplastic elastomers (including these hydrogenated products) such as styrene thermoplastic elastomers and styrene-isoprene copolymer rubbers.
Other synthetic resins such as the elastomer component can be blended in an amount of 0 to 60% by weight based on the total weight of the resin component constituting the base film.

As a resin component which comprises a base film, what contains 40-100 weight% of polypropylene resins with respect to the total weight of a resin component, especially 50-100 weight% is preferable, and resin other than a polypropylene resin is 50. Those containing ˜0% by weight are preferred.
Among them, it is preferable to contain a polypropylene-based thermoplastic elastomer produced by a multistage polymerization method as a polypropylene-based resin, and the content of the polypropylene-based thermoplastic elastomer is preferably 40 with respect to the total weight of the polypropylene-based resin. ~ 100% by weight. It is preferable to contain the polypropylene-based thermoplastic elastomer in the above-described amount because the flexibility of the base film is excellent and the curved shape conformability when a film with a coating film is excellent.
Examples of resins other than polypropylene resins include the above-mentioned polyethylene resins and elastomers. Among these resins, low density metallocene polyethylene having a density of 0.900 g / cm ³ or less, polyolefin thermoplastic elastomer, and hydrogenated styrene-butadiene copolymer. At least one selected from polymerized rubber is preferred.

The base film may be a single layer or a multilayer having two or more layers, for example, a three-layer having an inner layer, an intermediate layer and an outer layer, or a multilayer having three or more layers. When the base film is a multilayer, a layer in which the tensile elastic modulus (E1) of the inner layer and the tensile elastic modulus (E2) of the layer excluding the inner layer have a relationship of E1 ≧ E2 (this is a layer of three or more layers) Assuming that only the inner layer is taken out from the base film made of the film, the tensile elastic modulus (E1) of the film 1 composed only of the inner layer and the tensile elastic modulus (E2) of the film 2 composed of the layers excluding the inner layer Is preferably in a relationship of E1 ≧ E2. In addition, an inner layer means the layer by which the adhesive layer is laminated | stacked when a base film is post-processed for adhesive films, and the layer on the opposite side is called an outer layer. The “tensile modulus” as used in the present invention refers to a value measured in accordance with JISK7127.
Moreover, when the base film is a multilayer having at least an inner layer, an intermediate layer, and an outer layer, it is preferable that the thickness of the intermediate layer is 50% or more of the total thickness of the base film.
The base film may have at least one other layer between the inner layer and the intermediate layer and between the outer layer and the intermediate layer. In this case, the other layer may contain a polyolefin-based resin, but other resin, for example, a resin that enhances the adhesion between the inner layer (and / or outer layer) and the intermediate layer. It may be.

As a preferred embodiment of the base film, specifically, for example, (1) 95 to 50% by weight of a polypropylene resin comprising 0 to 100% by weight of homopolypropylene and 100 to 0% by weight of random polypropylene and a hydrogenated styrene-butadiene copolymer are used. A film containing 5 to 50% by weight of polymer rubber, (2) 90 to 20% by weight of a polypropylene resin consisting of 0 to 100% by weight of homopolypropylene and 100 to 0% by weight of a random polypropylene, and a polyolefin-based thermoplastic elastomer and / or A film containing 10 to 80% by weight of a low density metallocene polyethylene having a density of 0.900 g / cm ³ or less, and (3) containing 40 to 100% by weight of a homopolypropylene and / or a reactor-type polypropylene thermoplastic elastomer. Film, (4) many A film having a layer containing 40 to 100% by weight of a polyolefin resin produced by a multistage polymerization method such as a polypropylene thermoplastic elastomer produced by a polymerization method, (5) having at least an inner layer, an intermediate layer and an outer layer, The layer is a layer containing 40 to 100% by weight of a polyolefin resin produced by a multistage polymerization method such as a polypropylene thermoplastic elastomer produced by a multistage polymerization method, and the inner layer and / or the outer layer is produced by a multistage polymerization method. A film that is a layer containing a polyolefin resin other than the polyolefin resin that is made, that is, the inner layer and / or the outer layer is a layer containing another polyolefin resin instead of the polyolefin resin produced by the multistage polymerization method, Or polyolefin resin manufactured by multi-stage polymerization method Ete film is a layer containing the other polyolefin resins, and the like.

The polyolefin resin used for the base film of the present invention preferably has a tensile modulus of 100 to 1000 MPa, more preferably 150 to 700 MPa, and even more preferably 150 to 400 MPa. When the tensile modulus of the polyolefin resin is 100 MPa or more, the sticking property of the film with a coating film to the adherend, and when the film with a coating film is peeled from the adherend, the film is stretched and difficult to peel off. It can suppress that it is inferior to handleability, such as becoming, and can suppress further that a film becomes sticky and becomes easy to block. Moreover, there is no possibility that it is inferior to a softness | flexibility by making a tensile elasticity modulus 1000 Mpa or less, and to be inferior to the workability with respect to a curved surface or bending.
Although the thickness of a base film is suitably selected in consideration of a resin composition, concealability, and followability of a curved surface, it is usually 30 to 500 μm, preferably 50 to 300 μm.

The base film of the present invention preferably contains a light stabilizer such as an ultraviolet absorber and / or a hindered amine light stabilizer (HALS) from the viewpoint of weather resistance.
A well-known thing can be used for a ultraviolet absorber and / or a hindered amine light stabilizer.

  Examples of the ultraviolet absorber include salicylic acid ester-based, benzophenone-based, benzotriazole-based, cyanoacrylate-based, and triazine-based ultraviolet absorbers.

  Examples of hindered amine light stabilizers include 2,2,6,6-tetramethylpiperidinyl-4-benzoate, bis (2,2,6,6-tetramethyl-4-piperidinyl) sebacate, and tris (2,2 , 6,6-tetramethyl-4-piperidinyl) phosphite (“Kimasoap 944” manufactured by BASF Corporation), 1,3,8-triaza-7,7,9,9-tetramethyl-3-n-octylpyro [4,5] Decane-2,4-dione (“TINUVIN 144” manufactured by BASF Corporation), 1,2,3,4-tetra (4-carbonyloxy-2,2,6,6-tetramethylpi Peridinyl) -butane, 1,3,8-triaza-7,7,9,9-tetramethyl-2,4-dioxo-spiro [4,5] decane, tri (4-acetoxy-2,2,6 , 6-Tetramethylpiperidi Nyl) amine, 4-stearoyloxy-2,2,6,6-tetramethylpiperidine, 4-benzyloxy-2,2,6,6-tetramethylpiperidine, 4-phenylcarbamoyloxy-2,2,6 6 tetramethylpiperidine, 4-p-toluenesulfonyloxy-2,2,6,6-tetramethylpiperidine, bis (2,2,6,6-tetramethyl-4-piperidinyl) terephthalate, and the like.

  Moreover, a coloring agent, a filler, a slip agent (lubricant), an antiblocking agent, etc. can be added to the base film of this invention in the range which does not impair the objective and performance as needed.

Examples of a method for forming the base film of the present invention include generally known film forming methods such as an extrusion forming method such as a T-die forming method, an inflation forming method, and a calendar forming method.
Further, when the base film is a multilayer film, as a method of laminating each layer, a method of laminating individual formed films (layers) with a laminator or a method of pressure laminating simultaneously with film formation can be used. A method of producing a multilayer film simultaneously with molding by the T-die extrusion method is preferable because the number of steps can be reduced.

For example, when the molten resin is nipped with a cooling roll and cooled in a T-die molding method or a calendar molding method, the surface irregularity of the base film is arbitrarily increased by changing the surface shape of the cooling roll. Can be typed. Moreover, the surface shape according to the surface shape of a nip roll can also be shape | molded by nipping the film after shaping | molding with the heated roll.
Moreover, you may shape | mold into arbitrary surface shapes by the method of other well-known surface unevenness | corrugation control.

As the curable coating film of the present invention, a type of coating film that is cured by a method such as thermal curing, ultraviolet curing, or electron beam curing can be used.
In the present invention, the effect of the present invention is particularly effective in a coating film of a type that requires a certain amount of time for curing, such as a thermosetting type.
In other words, in the production method for forming a coating film on a base film, if the film has a winding process immediately after coating, the coating film may not be cured sufficiently, and the film is not rolled and is not sufficiently cured. Therefore, the surface on the opposite side of the base film and the coating surface are in close contact with each other, and appearance defects such as white blurring tend to occur on the surface of the coating film.

The composition of the curable coating film of the present invention is not particularly limited. For example, in the case of a thermosetting type, JP 2006-142667 A, JP 2006-142668 A, and JP 2007. A thermosetting coating disclosed in Japanese Patent No. -83530 can be used.
For example, a radical polymerizable unsaturated monomer containing diisocyanate, high molecular weight polyol and / or urethane resin, or a composition containing acrylic modified urethane resin, acrylic polyol and / or isocyanate compound, etc. is used. Can do.

  The coating layer of the present invention preferably contains an ultraviolet absorber and / or a hindered amine light stabilizer for the purpose of imparting weather resistance under long-term and severe conditions outdoors. As the ultraviolet absorber and the light stabilizer, those mentioned in the description of the base film can be used.

  Moreover, you may mix | blend an antioxidant, an antistatic agent, organic type and / or inorganic type powder, etc. in the coating layer of this invention in the range which does not impair the performance.

  Moreover, it is preferable that the thickness of the coating film of this invention is 0.5-30 micrometers, 1-20 micrometers is more preferable, and 1-10 micrometers is further more preferable. By setting the thickness to 0.5 μm or more, there is no possibility of being inferior in scratch resistance. Moreover, generation | occurrence | production of the curl of the film with a coating film and generation | occurrence | production of the crack of a coating-film layer can be suppressed more by making thickness into 30 micrometers or less.

The resin film with a coating film of the present invention can be used as various decorative pressure-sensitive adhesive tapes by forming a pressure-sensitive adhesive layer on the surface of the base film on which the coating film layer is not formed.
As the pressure-sensitive adhesive, either an acrylic or rubber-based pressure-sensitive adhesive may be used, but when the laminated film is used outdoors, an acrylic pressure-sensitive adhesive having high weather resistance is preferable. As an acrylic adhesive, what consists of acrylic polymers, such as a polymer of a (meth) acrylic acid ester monomer, is mentioned. Examples of the (meth) acrylic acid ester monomer include (meth) acrylic acid esters of alcohols having an alkyl group having 2 to 12 carbon atoms, preferably an alkyl group having 4 to 12 carbon atoms. N-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, n-octyl (meth) acrylate, isononyl (meth) acrylate, lauryl (meth) acrylate, etc. Can be mentioned. These can be used alone or in combination of two or more. In view of the balance between adhesiveness and cohesiveness, etc., the homopolymer glass transition temperature (Tg) is usually -50 ° C. or less and the main component is (meth) acrylic acid ester, and lower alcohols such as ethyl (meth) acrylate ( It is preferable to use a (meth) acrylic acid ester in combination. Moreover, as an acrylic polymer of the said acrylic adhesive, the monomer copolymerizable with these other than said vinyl monomer may be copolymerized. As such a copolymerizable monomer, a carboxyl group-containing monomer such as (meth) acrylic acid, maleic acid, fumaric acid or itaconic acid or its anhydride, 2-hydroxyethyl (meth) acrylate, Examples thereof include hydroxyl group-containing monomers such as 4-hydroxybutyl acrylate, polyoxyethylene (meth) acrylate, polyoxypropylene (meth) acrylate, or caprolactone-modified (meth) acrylate.

The pressure-sensitive adhesive is a solvent-type acrylic pressure-sensitive adhesive polymerized in a solvent, an emulsion-type pressure-sensitive adhesive polymerized in water, or a block polymerization pressure-sensitive adhesive that is irradiated with ultraviolet rays on a monomer mixture. Also good.
The thickness of the pressure-sensitive adhesive layer varies depending on the composition of the pressure-sensitive adhesive and is not particularly limited, but is usually 20 to 50 μm.

  Formation of the pressure-sensitive adhesive layer on the base film is performed, for example, by dissolving a composition in which the above-mentioned pressure-sensitive adhesive and other components as necessary are mixed in a known organic solvent, and further diluting agent if necessary. Prepare a suitable concentration using, apply to the release material (eg release paper coated with silicon) by a known method such as bar coating, knife coating, roll coating, die coating or gravure roll coating, and then dry with hot air It is manufactured by laminating a pressure-sensitive adhesive layer on the surface opposite to the surface of the base film on which the coating film layer is formed after drying using a machine or the like.

  Moreover, in order to improve adhesiveness between the base film and the coating layer and / or between the base film and the pressure-sensitive adhesive layer, the resin film with a coating film of the present invention includes an acrylic resin, A primer layer containing urethane resin, acrylic-modified urethane resin or a mixture thereof (preferably containing 50 to 100% by weight) may be provided.

  Examples of the acrylic resin used in the primer layer include a polymer of alkyl (meth) acrylate, a copolymer of alkyl (meth) acrylate and a copolymerizable monomer, or a mixture thereof. Examples of the alkyl group of the alkyl (meth) acrylate include a methyl group, an ethyl group, a butyl group, a 2-ethylhexyl group, and an octyl group. Examples of the copolymerizable monomer include hydroxyalkyl esters of (meth) acrylic acid (for example, hydroxyethyl ester, hydroxybutyl ester or hydroxyhexyl ester), (meth) acrylic acid glycidyl ester, (meth) acrylic acid, Itaconic acid, maleic anhydride, (meth) acrylic acid amide, (meth) acrylic acid N-hydroxymethylamide, (meth) acrylic acid alkylaminoalkyl (for example, dimethylaminoethyl methacrylate or t-butylaminoethyl methacrylate), Examples thereof include vinyl acetate, styrene, acrylonitrile and the like.

Examples of the urethane-based resin used for the primer layer include those obtained by reacting a polyol and an isocyanate compound. Examples of the polyol include the above-described polyester polyol and acrylic polyol, and the above-mentioned isocyanate compound can also be used.
Examples of the acrylic-modified urethane resin used for the primer layer include a resin obtained by copolymerizing the above urethane resin and an acrylic component composed of a radical polymerizable unsaturated monomer and / or a polymer thereof. In the case where the acrylic-modified urethane resin has a hydroxyl group, it can be further crosslinked with an isocyanate compound.
The primer layer may be formed in accordance with the above-described formation of the coating layer or the pressure-sensitive adhesive layer. The roll of the resin film with a coating film is not limited in the number of turns, but is preferably 10,000 m or less, more preferably 5000 m or less in terms of handling.

  Another embodiment of the present invention is a resin with a coating film in which the surface roughness Rz of at least the back surface of the substrate film of the resin film with a coating film having a curable coating film on the surface of the substrate film is 6.0 or more. It is the resin film roll with a coating film by which the film was wound up in roll shape.

The winding method of the resin film roll with a coating film is not particularly limited, and a center wind method, a surface wind method, or the like can be used.
Moreover, although the width | variety of a film roll is not specifically limited, From the ease of handling, it is preferable that the width | variety of a film roll is 250 mm-2500 mm, More preferably, it is 300 mm-2000 mm.
Further, the winding length of the film roll is not particularly limited, but is preferably 100 m to 10000 m, and more preferably 200 m to 7000 m, from the viewpoint of ease of winding and handling.
Moreover, as a winding core, a paper tube, a plastic core, and a metal core, such as 1 inch-10 inches, can be used normally.

The resin film roll with a coating film can be stored and transported by covering the resin film roll with a coating film with a packaging film, cardboard or the like in order to prevent scratches, dust and dirt.
The resin film roll with a coating film of the present invention is stored and transported in this state, and even when the resin film with a coating film is used, the appearance of the surface of the coating film layer is good without being fuzzy and the yield is improved. Can be improved.

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.

<Example 1>
(1) Production of base film (A) From 100 parts by weight of propylene random copolymer (Grand Polymer Co., Ltd., Grand Polypro F327) and 0.1 part by weight of hindered amine light stabilizer (BASF Co., Ltd.) Using the resulting mixture, a polyolefin resin film having a thickness of 0.1 mm was formed by an extrusion molding machine manufactured by Mitsubishi Heavy Industries, Ltd.
At that time, in the chill roll on the side in contact with the back surface of the base film, the surface of the chill roll is subjected to surface processing so that the surface roughness is 1 to 2 times the Rz and Ra values which are the target values of the surface roughness of the film. The nip line pressure of the cooling roll is in the range of 0.1 to 10 MPa so that the surface roughness of the back surface of the base film becomes the values shown in Tables 1 (A) to (E) using the cooling roll. It adjusted and produced the film of Table 1 (A)-(E).
Next, the surface opposite to the back surface of the base film formed with surface irregularities with a cooling roll (coating surface side) is subjected to corona treatment so that the Nure index is 45 mN / m to produce a base film. did.
The surface roughness of each film was measured by taking a surface observation image using a laser microscope VK-X100 manufactured by Keyence Corporation and analyzing the obtained image.
Moreover, the tensile elasticity modulus of the obtained film was 600 MPa.

(2) Formation of coating layer (2-1) Production of acrylic modified urethane resin (a) Isophorone diisocyanate 31.4 weight in a four-necked flask equipped with a stirrer, reflux condenser, dropping funnel and thermometer 128.4 parts by weight of polycarbonate glycol (Placcel CD220, hydroxyl value 56.1 KOHmg / g, weight average molecular weight 2000 manufactured by Daicel Chemical Industries, Ltd.) melted while stirring at 90 ° C. (Blemmer GLM, manufactured by NOF Corporation) 2.2 parts by weight and 0.02 parts by weight of methylhydroquinone were added dropwise over about 1 hour. After keeping the internal temperature at 90 ° C. and reacting for 4 hours, 208.9 parts by weight of methyl ethyl ketone was added, and the mixture was diluted by stirring at 60 ° C. for 1 hour. Next, a solution of 8.7 parts by weight of isophoronediamine and 52.2 parts by weight of isopropanol was added dropwise over 1 hour with stirring, and 3.3 parts by weight of di-n-butylamine was further added to block the ends. Subsequently, 157.9 parts by weight of methyl methacrylate, 16.1 parts by weight of 2-hydroxyethyl methacrylate, and 385.4 parts by weight of methyl ethyl ketone were charged and heated to 70 ° C. in a nitrogen stream to 5.2 weights of azobisisobutyronitrile. The portion was divided into 3 portions and added at 1 hour intervals, and the reaction was further continued for 10 hours. The resulting acrylic modified urethane resin (a) solution (main agent solution) had a resin solid content concentration of 35% by weight, a viscosity of the resin solution of 500 mPa · s, and a weight average molecular weight of the acrylic modified urethane resin (a) resin of 47,000. It was.

(2-2) Production of acrylic polyol (b) 100 parts by weight of solvent naphtha (solvent) was charged into a flask equipped with a stirrer, a temperature controller, and a dehydrator with a condenser, and heated with stirring to a solvent temperature of 100. Raised to ° C. Subsequently, methyl methacrylate (180 parts by weight), 2-ethylhexyl acrylate (80 parts by weight), 2-hydroxyethyl methacrylate (136 parts by weight), and methacrylic acid (4 parts by weight) are each added dropwise over 2 hours, and then for 4 hours. To produce an acrylic polyol (b).
60 parts by weight of the acrylic modified urethane resin (a) obtained in (2-1), 24 parts by weight of the acrylic polyol (b) obtained in (2-2) and an isocyanate compound (Duranate TPA- manufactured by Asahi Kasei Chemicals) 90E) was mixed at a ratio of 15 parts by weight to prepare a coating layer forming coating material (c).

Evaluation method <Press evaluation of resin film with coating film>
After coating the coating layer forming coating (c) on the corona-treated surface of the base film obtained in (1) with a bar coater, it is heated and dried in a hot air drying oven at 80 ° C. for 1 minute. After that, the surface of the coating film layer coated with the coating film for forming a coating film layer (c) and the back surface of the base film obtained in (1) (surface on which the shape of the surface was shaped) were overlapped, Were pressed for 1 minute at press pressures of 0.5, 1.0, and 1.5 MPa, respectively.
In addition, the thickness of the coating layer after drying was 2 μm.
Next, the surface on the coating film side of the resin film with a coating film after pressing at each pressure was visually observed. The results are shown in Table 2.
In the evaluation, “◯” indicates that the appearance is acceptable, and “×” indicates that the appearance is not acceptable.
The press pressure of 0.5 MPa was obtained by applying the surface shape of the base film obtained in (1) to D. After applying the paint on the corona-treated surface side with a reverse roll coater, This is the pressure when a defect in appearance occurs in a film roll that has been heated and dried for 1 minute in a hot air drying oven and wound with a winder.

<Evaluation results>
From Table 2, it was confirmed that Examples 1 and 2 had good appearance even at a press pressure of 1.5 MPa, and Example 3 had a good appearance even at a press pressure of 1.0 MPa.
On the other hand, Comparative Examples 1 and 2 were results in which white blur occurred on the surface on the coating layer side even at a press pressure of 0.5 MPa, and the appearance was not excellent.

Claims (7)

  A resin film with a coating film having a curable coating film on the surface of the substrate film, wherein the surface roughness Rz of the back surface of the substrate film is 6.0 or more.   The resin film with a coating film according to claim 1, wherein the surface roughness Ra of the back surface of the base film is 0.5 or more.   The said base film contains polyolefin resin, The resin film with a coating film of Claim 1 or 2 characterized by the above-mentioned.   The resin film with a coating film according to claim 3, wherein the polyolefin-based resin contains a polypropylene-based thermoplastic elastomer produced by a multistage polymerization method.   The resin film with a coating film according to claim 3 or 4, wherein the polyolefin resin has a tensile modulus of 100 to 1000 MPa.   The resin film with a coating film according to any one of claims 1 to 5, wherein the curable coating film is a thermosetting coating film.   The resin film roll with a coating film by which the resin film with a coating film of any one of Claims 1-6 was wound up.