JP2005335161A - Method for manufacturing laminated sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated sheet having a mirror surface-like metallic gloss value which indicates high glossiness. <P>SOLUTION: In this method for manufacturing the laminated sheet, a mirror surface-like metallic gloss ink layer containing a fine fragment of a metallic thin film in a binding resin, is laminated on a transparent or translucent film layer and an organic solvent with not less than 30% solubility to the binding resin is applied to the ink layer. In addition, the gloss value of the laminated sheet by this method is not less than 1,300. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for producing a laminated sheet having a high specular metallic luster.

2. Description of the Related Art Conventionally, a method for producing a laminated sheet having high metallic luster using a laminated sheet having an ink film in which metal thin film pieces are dispersed in a binder resin varnish is known (see, for example, Patent Document 1). . However, when a mirror-like metallic glossy ink layer containing a metal thin film strip in a binder resin is laminated on a transparent or translucent film layer that has been conventionally used, the gloss value when viewed from the film layer side is obtained. The metallic gloss value was not sufficient. For this reason, the present condition is that the laminated sheet which has a high gloss value is not yet obtained.
JP-A-10-158561

  An object of the present invention is to provide a laminated sheet having a high specular metallic gloss value.

As a result of intensive studies to solve the above-mentioned problems, the present inventors have obtained a film by simply laminating a mirror-like metallic glossy ink layer containing metal thin film strips in a binder resin on a transparent or translucent film layer. The gloss value when viewed from the layer side is not sufficient. However, the present inventors have found that the gloss value when viewed from the film layer side is greatly improved by further applying an organic solvent on the ink layer, thereby completing the present invention.

That is, the present invention provides a transparent or translucent film layer on which a mirror-like metallic glossy ink layer containing metal thin film strips in a binder resin is laminated and then dissolved in the binder resin on the ink layer. The manufacturing method of the lamination sheet characterized by applying the organic solvent whose is 30% or more is provided.
Moreover, the glossiness value manufactured by the manufacturing method of the lamination sheet of this invention is 1300 or more, and the lamination sheet is provided.

The production method of the present invention can provide a laminated film that gives a specular metallic luster having a high gloss value.

  Below, the manufacturing method of the lamination sheet of this invention is explained in full detail.

(Film layer)
The transparent or translucent film layer used in the present invention is not particularly limited as long as the mirror-like metallic glossy ink layer can be visually recognized from the film side, and may be a single layer or a multilayer film and may contain a colorant. .

  As the transparent or translucent film layer used in the present invention, polyethylene, polypropylene, polyethylene terephthalate, cyclic olefin / ethylene copolymer, polybutylene terephthalate, acrylic resin, silicon-acrylic resin, ionomer, polystyrene, styrene / acrylonitrile resin, Thermoplastic resin films such as polyurethane, nylon, ethylene-vinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyvinyl fluoride, polyvinylidene difluorate, polycarbonate, polyarylate, and acrylic resin, unsaturated polyester resin, vinyl ester resin, A thermosetting resin film such as an epoxy resin is preferably used.

(High gloss ink)
In the mirror-like metallic glossy ink layer containing the metal thin film strip of the laminated sheet used in the present invention in the binder resin, the ink having the mirror metallic gloss, in which the metal thin film strip is dispersed in the binder resin ( Hereinafter, it is referred to as “high gloss ink”). It is preferable that content with respect to the non volatile matter in the ink of a metal thin film piece is the range of 3-60 mass%. High-gloss inks using thin metal strips are metallic inks that use conventional metal powders when the thin metal strips are oriented parallel to the surface of the object when the ink is printed or applied. A high-brightness mirror-like metallic luster having a high gloss value that cannot be obtained by the above method is obtained.

(Metal thin film strip)
Aluminum, gold, silver, copper, brass, titanium, chrome, nickel, nickel chrome, stainless steel, etc. can be used as the metal of the metal thin film strip contained in the high gloss ink used in the ink layer. As a method for forming a metal into a thin film, in the case of a metal having a low melting point such as aluminum, it is a foil if it is malleable, such as aluminum, gold, silver, copper, in the case of a metal having a high melting point and no malleability. , Sputtering and the like. Among these, the metal thin film strip obtained from the vapor deposition metal thin film is preferably used. The thickness of the metal thin film is preferably 0.01 to 0.1 μm, more preferably 0.02 to 0.08 μm. The size in the surface direction of the thin metal thin film dispersed in the ink is preferably 5 to 25 μm, more preferably 10 to 15 μm. When the size is less than 5 μm, the brightness of the coating film is insufficient, and when it exceeds 25 μm, the metal thin film strip is difficult to be oriented, so that the brightness is lowered and the ink is printed or applied by a gravure method or a screen printing method. Doing so will cause clogging of the plate.

  In the following, a method for producing a metal thin film strip will be described using a particularly preferred vapor deposition method as an example. A polyolefin film, a polyester film, etc. can be used for the support body film which vapor-deposits a metal. First, a release layer is provided on the support film by coating, and then a metal is deposited on the release layer so as to have a predetermined thickness. It is preferable to apply a topcoat layer to the vapor deposition film surface in order to prevent oxidation. The same coating agent for forming the release layer and the top coat layer can be used.

  Resin used for a peeling layer or a topcoat layer is not specifically limited. Specific examples include cellulose derivatives, acrylic resins, vinyl resins, polyamides, polyesters, EVA resins, chlorinated polypropylene, chlorinated EVA resins, petroleum resins, and the like. Solvents include aromatic hydrocarbons such as toluene and xylene, aliphatic or alicyclic hydrocarbons such as n-hexane and cyclohexane, esters such as ethyl acetate and propyl acetate, methanol, ethanol and isopropyl alcohol. Alcohols, ketones such as acetone and methyl ethyl ketone, and alkylene glycol monoalkyl ethers such as ethylene glycol monoethyl ether and propylene glycol monomethyl ether can be used.

  The metal vapor-deposited film is immersed in a solvent that dissolves the release layer and the topcoat layer and stirred. After the metal vapor-deposited film is peeled from the support film, the metal vapor-deposited film is further stirred to reduce the size of the metal thin film strip. Set to 5 to 25 μm, filter and dry. The solvent is not particularly limited except that it dissolves the resin used for the release layer or the topcoat layer. Even when the metal thin film is formed by sputtering, the metal thin film can be formed by the same method as described above. When using a metal foil, it may be pulverized to a predetermined size with a stirrer as it is in a solvent.

  The metal thin film strip is preferably surface-treated in order to enhance dispersibility in the ink. Examples of the surface treating agent include organic fatty acids such as stearic acid, oleic acid, and palmitic acid, and cellulose derivatives such as methylsilyl isocyanate, nitrocellulose, cellulose acetate propionate, cellulose acetate butyrate, and ethyl cellulose. To adsorb on the surface of the thin metal film.

(Binder resin)
As the binder resin, those usually used in conventional gravure ink, flexo ink, screen ink, paint or the like can be used. Specifically, for example, acrylic resins for paint, vinyl chloride resins, vinylidene chloride resins, vinyl chloride-vinyl acetate resins, ethylene-vinyl acetate resins, polyolefin resins, chlorinated olefin resins, polymerization resins such as ethylene-acrylic resins, Alternatively, a polyurethane resin for paint, a polyamide resin, a urea resin, an epoxy resin, a polyester resin, a petroleum resin, a cellulose derivative resin and the like are preferably used. In addition, those obtained by chemically bonding polar resins such as carboxylic acid group, phosphoric acid group, sulfonic acid group, amino group and quaternary ammonium base to these resins may be used or used in combination.

(Additive)
High gloss ink used in the ink layer, if necessary, defoaming, settling prevention, pigment dispersion, fluidity modification, antiblocking, antistatic, oxidation in the ink, unless it impairs design and spreadability. Various additives used in conventional gravure inks, flexo inks, screen inks, paints and the like can be used for the purpose of prevention, light stability, ultraviolet absorption, internal crosslinking and the like. Examples of such additives include coloring pigments, dyes, waxes, plasticizers, leveling agents, surfactants, dispersants, antifoaming agents, chelating agents, polyisocyanates, and the like.

(solvent)
As the solvent used in the high-gloss ink used in the ink layer, a known and commonly used solvent used in conventional gravure ink, flexo ink, screen ink, paint or the like can be used. Specifically, for example, aromatic hydrocarbons such as toluene and xylene, aliphatic or alicyclic hydrocarbons such as n-hexane and cyclohexane, esters such as ethyl acetate and propyl acetate, methanol, ethanol, isopropyl alcohol and the like Alcohols, ketones such as acetone and methyl ethyl ketone, and ethers such as tetrahydrofuran, ethylene glycol monoethyl ether, and propylene glycol monomethyl ether.

(Preparation method of high brightness ink)
Generally, in order to stably disperse the ink blending raw material, the pigment and other additives are finely divided to submicron by kneading using a roll mill, ball mill, bead mill, or sand mill. However, the metal thin film strip to be incorporated in the high gloss ink used for the ink layer of the thermoforming laminated sheet having excellent specularity used in the molding of the present invention has a size of 5 to 25 μm. Is preferable. When the above-mentioned kneaded meat is performed, the metal thin film pieces become fine particles, and the metallic luster is extremely lowered. Therefore, in the present invention, it is desirable not to perform kneading, but to simply mix the above-mentioned blending raw materials into an ink. For this purpose, for the purpose of improving dispersibility, it is preferable to surface-treat the metal thin film strip as described above.

(Printing or coating method)
The printing or coating method of the ink layer of the laminated sheet used in the production method of the present invention is a gravure printing, flexographic printing, a printing method such as screen printing, a gravure coater, a gravure reverse coater, a flexo coater, a blanket coater, a roll coater, Coating methods such as a knife coater, an air knife coater, a kiss touch coater, a kiss touch reverse coater, a comma coater, a comma reverse coater, and a micro gravure coater can be used. If the ink film thickness is too thin, the concealability tends to be inferior and the design property tends to be impaired. If it is too thick, the orientation of the metal thin film strips tends to be non-uniform. For this reason, as a film thickness of an ink layer, 5 micrometers or less are preferable, 0.05-5 micrometers is more preferable, Especially preferably, it is 0.5-3 micrometers.

(Organic solvent)
In the method for producing a laminated sheet of the present invention, the organic solvent applied on the ink layer after laminating the mirror-like metallic glossy ink layer has a solubility of 30% in the binder resin of the mirror-like metallic glossy ink layer. Although it is above, it is preferable that it is 40% or more, and it is still more preferable that it is 50% or more.

Here, the dissolution rate (%) with respect to the binder resin is a value obtained by the following method.
1) Binder resin solution (6.5% non-volatile content) obtained by removing foil pigment from high-brightness ink to be coated with organic solvent is coated with BC # 30 on PET film and dried with a dryer. A resin-resin sheet is obtained.
2) The above sheet is cut into 3 cm × 3 cm, and after weighing (Ag), it is infiltrated into a solvent for measuring the dissolution rate (25 ° C.).
3) After 5 minutes, the sheet is pulled up, dried with a dryer and weighed (Bg).
4) Wash the sheet of 3) with methyl ethyl ketone, dissolve the binder resin, and weigh only the PET film (Cg).
From the obtained weighed value, the dissolution rate with respect to the binder resin = (A−B) / (A−C) × 100 (%)
Thus, a dissolution rate (%) for the binder resin was obtained.
This value can be easily selected by dissolving the binder resin used in the mirror-like metallic glossy ink layer in various solvents according to the measurement method described above.

As the organic solvent used in the present invention, an organic solvent selected from at least one selected from the group consisting of esters, ketones and ethers can be mentioned as a preferred organic solvent.
More specific examples of preferred solvents include
Esters include ethyl acetate, butyl acetate,
As ketones, methyl ethyl ketone, methyl isobutyl ketone,
Examples of ethers include tetrahydrofuran.

Further, these mixed solvents and other solvents and mixed solvents of these solvents may be used.
As a preferable mixed solvent,
1) Ethyl acetate, isopropyl acetate, methyl ethyl ketone, methyl isobutyl ketone and n-propyl alcohol,
2) Ethyl acetate, isopropyl acetate, methyl ethyl ketone, isobutyl acetate and n-propyl alcohol,
3) Ethyl acetate, isopropyl acetate, methyl ethyl ketone, toluene and n-propyl alcohol,
4) A combination of ethyl acetate, isopropyl acetate, methyl ethyl ketone and isopropyl alcohol can be mentioned.
The organic solvent may contain a resin compatible with the binder resin for the purpose of adjusting the viscosity.

(Coating method of organic solvent)
The method for coating the organic solvent on the mirror-like metallic glossy ink layer is not particularly limited, but a gravure coater, gravure reverse coater, micro gravure coater, spray coater, dip coater, flexo coater, blanket coater, roll coater, knife coater. Examples thereof include a coating method using an air knife coater, a kiss touch coater, a kiss touch reverse coater, a comma coater, and a comma reverse coater.
The coating method is preferably selected in consideration of the solubility of the binder resin in the organic solvent. For example, in a coating method in which a coating roll such as a micro gravure coater and a substrate are in direct contact, if a solvent having too high a binder resin solubility is used, the high gloss ink layer is dissolved / dropped, May be significantly impaired. When such a solvent is used, coating by a spray coater is preferable.

A time (Open Time) may be provided between applying the solvent on the ink layer and forcibly drying. Depending on the combination of the binder resin and ink used in the ink layer, the thickness and the solvent to be applied, Open Time is preferably 0 to 5 minutes, more preferably 0 to 1 minutes so as not to impair productivity. .

The reason why the gloss value is improved by applying an organic solvent is presumed to be due to the following two effects.
(1) If high gloss ink is simply applied to the film, the orientation of the metal thin film strips in the high gloss ink is disturbed due to the stress caused by the coating or the distortion left by drying of the solvent in the ink. Yes. For this reason, when viewed from the film side, the original gloss of the metal thin film strip cannot be obtained. According to the production method of the present invention, after applying the high-gloss ink, the organic resin is applied to re-dissolve the binder resin and release the distortion remaining in the high-gloss ink. It is possible to smooth a metal thin film strip such as a piece.

(2) Whitening (brushing) of the binder resin, which occurs due to the influence of moisture in the air at the time of coating / drying of the high glitter ink, can be eliminated by re-dissolving the binder resin.
(Gloss value)
According to the production method of the present invention, it is possible to improve the gloss value by 20% or more, more preferably 30% or more of the gloss value when the high gloss ink is applied on the film. That is, when a normal glossy ink is applied to a film, only a gloss value of about 1000 to 1100 can be obtained, whereas a gloss value of 1200 or more, preferably 1300 or more can be obtained.

(Protective layer)
Protective layer for the purpose of improving solvent resistance, surface smoothness, heat resistance, designability, weather resistance, etc. on the surface where the transparent or translucent film layer of the laminated sheet used in the present invention and the mirror-like metallic glossy ink layer are in contact One or more layers may be provided. Although there is no restriction | limiting in particular about the kind of resin which can be used for a protective layer, Acrylic resin is preferable from points, such as the ease of adjustment of a crosslinking density, a weather resistance, and adhesiveness with a transparent film. There is no particular limitation on the crosslinking mechanism, and in the case of an acrylic resin, UV curing, EB curing, hydroxyl group-containing copolymer / isocyanate curing, silanol / water curing, epoxy / amine curing, etc. can be used. From the viewpoints of ease, weather resistance, reaction rate, presence or absence of reaction by-products, production cost, etc., hydroxyl group-containing copolymer / isocyanate curing is preferred. Further, the protective layer can be a colored layer in order to impart design properties.

This protective layer prevents the solvent in the high-brightness ink layer from penetrating into the film layer, and after the organic solvent penetrates into the ink layer by the organic solvent coating used in the production method of the present invention, Can be prevented from penetrating. For this reason, it has a function which prevents that a solvent also melt | dissolves a film layer and glossiness falls.

  Hereinafter, the present invention will be described with specific examples, but the present invention is not limited thereto. In addition, the physical-property evaluation in an Example and a comparative example was performed with the following measuring method or test method. In the examples, “part” and “%” are both based on mass.

(Gloss value measurement method)
The gloss value of the laminated sheet was determined by a 20 ° gloss measurement method based on JIS-K7105 with an incident angle of 20 ° and a light receiving angle of 20 ° from a transparent or translucent film layer. The gloss meter used was micro-TRI-Gloss (manufactured by BYK Gardner).

(Production of laminated sheet)
(1) Aluminum thin film strip Nitrocellulose (HIG7) was dissolved in a mixed solvent of ethyl acetate: isopropyl alcohol = 6: 4 to obtain a 6% solution. The solution was applied onto a polyester film with a gravure plate having a screen line number of 175 lines / inch and a cell depth of 25 μm to form a release layer. After sufficiently drying, aluminum is vapor-deposited on the release layer to a thickness of 0.04 μm, and the same nitrocellulose solution as that used for the release layer is applied to the deposited film surface under the same conditions as in the release layer. The top coat layer was formed by coating.
The deposited film is immersed in a mixed solvent of ethyl acetate: isopropyl alcohol = 6: 4 to peel the aluminum deposited film from the polyester film, and then the aluminum deposited film is pulverized with a stirrer so that the size becomes about 150 μm. An aluminum thin film strip was prepared.

(2) Aluminum thin film strip slurry Aluminum thin film strip 10 parts Ethyl acetate 35 parts Methyl ethyl ketone 30 parts Isopropyl alcohol 30 parts The above mixture was mixed and stirred, and 5 parts of a nitrocellulose solution having the following composition was added.
Nitrocellulose (HIG 1/4) 25%
Ethyl acetate: isopropyl alcohol = 6: 4 mixed solvent 75%
While maintaining the temperature at 35 ° C. or lower, the above mixture is stirred using a turbo mixer until the size of the aluminum thin film pieces becomes 5 to 25 μm, thereby preparing an aluminum thin film piece slurry (nonvolatile content 10%). did.

(Protective layer)
(Hydroxyl-containing copolymer)

  850 parts of butyl acetate and 1 part of perbutyl Z (trade name, manufactured by NOF Corporation, t-butyl peroxybenzoate) are added to a reaction vessel equipped with a temperature controller, a nitrogen introducing tube, a dropping device (2 units), and a stirring device. After charging and nitrogen substitution, the temperature was raised to 110 ° C. over 1.5 hours.

  Separately, a solution in which 660 parts of methyl methacrylate, 150 parts of t-butyl methacrylate and 190 parts of 2-hydroxyethyl methacrylate are mixed well (hereinafter referred to as a monomer solution), 200 parts of isobutyl acetate, and perbutyl O (trade name, Nippon Oil & Fat Co., Ltd.) A solution in which 9 parts of t-butyl peroxy-2-ethylhexanoate) and 2 parts of perbutyl Z (trade name, manufactured by NOF Corporation, t-butyl peroxybenzoate) are mixed well (hereinafter referred to as catalyst solution) Each was charged into a dropping device and immediately purged with nitrogen.

  The above monomer solution and catalyst solution were dropped in a reaction vessel under a nitrogen atmosphere over 5 hours while monitoring the reaction temperature so as not to increase rapidly. As a result of continuing stirring for about 15 hours after the completion of dropping, a resin composition (O-1) having a solid content of 60% was obtained. The weight average molecular weight of the obtained resin was 100,000, the hydroxyl value of the solid content was 79 KOHmg / g, and Tg was 95 ° C.

(Polyisocyanate compound)

“BURNOCK DN-981” (trade name, manufactured by Dainippon Ink & Chemicals, Inc., isocyanurate ring-containing polyisocyanate, number average molecular weight of about 1000, non-volatile content 75% (solvent: ethyl acetate), functional group number 3, NCO concentration 13 ~ 14%) is the polyisocyanate compound.

The hydroxyl group-containing copolymer and the polyisocyanate compound were blended and mixed at a ratio of 1: 1 to prepare a protective layer solution (1).

However, a weight average molecular weight shows the polystyrene conversion value of a GPC measurement result.
The solid content was calculated from the weight after taking 1 g of a sample in an aluminum dish, thinly and uniformly spreading with toluene, air-drying, and further drying in a hot air dryer at 108 ° C. for 1 hour.
The hydroxyl value was calculated from the monomer charge composition as the KOH neutralization amount, the polymer Tg was measured by DSC, and the acid value was measured by 0.05 mol · dm-3 potassium hydroxide-toluene solution titration method.

(Adjustment of high gloss ink)
Aluminum thin film slurry (non-volatile content 10%) 36 parts Binder Resin Carboxylic acid-containing vinyl acetate resin 3 parts
("Vinylite VMCH" manufactured by UCC)
Carboxylic acid-containing urethane resin 7 parts (Dainippon Ink & Chemicals "Tyforth NT810-45" nonvolatile content 45%)
Ethyl acetate 10 parts Methyl isobutyl ketone 30 parts Methyl ethyl ketone 2 parts n-Propanol 12 parts The above was mixed to prepare highly bright ink (2) having an aluminum thin film strip concentration of 37% by mass in the nonvolatile content.

(3) Film layer As the film layer, transparent, pencil hardness H, Tg 104 ° C. (JISK7121), 125 μm thick rubber-modified PMMA film A (Technoloy S001 manufactured by Sumitomo Chemical Co., Ltd.) was used.

(Comparative Example 1)
(Before organic solvent coating)
Layer structure: Film layer (rubber-modified PMMA film layer) / Protective layer / High gloss ink layer As rubber-modified PMMA film, rubber-modified PMMA film A (Technoloy S001 manufactured by Sumitomo Chemical Co., Ltd.) is added to the protective layer solution ( After coating 1) with a gravure coater with a dry film thickness of 2.0 μm, an aging treatment was performed at 50 ° C. for 4 days. Next, the high gloss ink (2) was applied on the protective layer with a gravure coater at a dry film thickness of 2.0 μm to obtain a laminated sheet A. The gloss value of the laminated sheet A was 1100.

(Example 1)
On the ink layer of the laminated sheet A obtained in Comparative Example 1, methyl ethyl ketone was applied using a # 14 bar coater and dried with a drier after 30 seconds to obtain a laminated sheet B. The gloss value of the obtained laminated sheet B was 1500 (an improvement in gloss value of 36%). However, methyl ethyl ketone is a solvent having a dissolution rate of 100% with respect to the binder resin used in the high gloss ink (2).

(Example 2)
On the ink layer of the laminated sheet A obtained in Comparative Example 1, ethyl acetate was applied using a # 14 bar coater and dried with a drier after 30 seconds to obtain a laminated sheet C. The gloss value of the obtained laminated sheet C was 1340 (an improvement in gloss value of 22%). However, ethyl acetate is a solvent having a dissolution rate of 74% with respect to the binder resin used in the high gloss ink (2).

(Example 3)
Tetrahydrofuran was coated on the ink layer of the laminated sheet A obtained in Comparative Example 1 using a # 14 bar coater, and dried with a dryer after 30 seconds to obtain a laminated sheet D. The gloss value of the resulting laminated sheet D was 1400 (27% improvement in gloss value). However, tetrahydrofuran is a solvent having a dissolution rate of 100% with respect to the binder resin used in the high glitter ink (2).

Example 4
On the ink layer of the laminated sheet A obtained in Comparative Example 1, a mixed solvent consisting of 30 parts of ethyl acetate, 18 parts of isopropyl acetate, 7 parts of methyl ethyl ketone, 31 parts of methyl isobutyl ketone and 14 parts of n-propyl alcohol was # 14. A laminated sheet E was obtained by coating using a bar coater and drying with a dryer after 60 seconds. The gloss value of the obtained laminated sheet E was 1470 (an improvement in gloss value of 34%). However, the mixed solvent used is a solvent having a dissolution rate of 100% with respect to the binder resin used in the high gloss ink (2).

(Example 5)
On the ink layer of the laminated sheet A obtained in Comparative Example 1, methyl ethyl ketone in which 10% by mass of a hydroxy group-containing vinyl chloride / vinyl acetate resin was dissolved was applied using a # 30 bar coater, and after 60 seconds, a dryer was used. The laminate sheet F was obtained by drying. The gloss value of the obtained laminated sheet F was 1330 (21% improvement in gloss value). However, the used methyl ethyl ketone is a solvent having a dissolution rate of 100% with respect to the binder resin used in the high glitter ink (2).

(Comparative Example 2)
Toluene was coated on the ink layer of the laminated sheet A obtained in Comparative Example 1 using a # 14 bar coater, and dried with a dryer after 30 seconds to obtain a laminated sheet G. The gloss value of the obtained laminated sheet G was 1060 (4% gloss value deterioration). However, the toluene used is a solvent having a solubility of 26% with respect to the binder resin used in the high gloss ink (2).

  From the above results, the method for producing a laminated sheet according to the present invention has a mirror-like metallic gloss value that can obtain a very high gloss value that cannot be obtained simply by laminating a high gloss ink layer on a film layer. It turns out that it is a manufacturing method of the lamination sheet which has.

  The laminated sheet having a high specular metallic gloss value obtained by the production method of the present invention has a high specular metallic gloss with a high gloss value that is not required for exterior coating and is used for applications such as automobile-related members, building material members, and home appliances. It can be usefully used as a molding sheet.

It is sectional drawing of the lamination sheet concerning embodiment of the lamination sheet manufactured with the manufacturing method of this invention, and is a figure explaining the case where a protective layer exists between a film layer and a high gloss ink layer.

Explanation of symbols

1 Laminated Sheet 2 Transparent Film Layer 3 Protective Layer 4 High Brightness Ink Layer

Claims (6)

After laminating a mirror-like metallic glossy ink layer containing metal thin film strips in a binder resin on a transparent or translucent film layer, the dissolution rate with respect to the binder resin is 30% or more on the ink layer. A method for producing a laminated sheet, wherein an organic solvent is applied. The method for producing a laminated sheet according to claim 1, wherein the organic solvent is an organic solvent selected from the group consisting of esters, ketones, and ethers. The method for producing a laminated sheet according to claim 1 or 2, wherein the gloss value is improved by 20% or more as compared to before coating by coating with the organic solvent. The manufacturing method of the lamination sheet in any one of Claims 1-3 in which the said organic solvent contains resin compatible with binder resin. The manufacturing method of the lamination sheet in any one of Claims 1-4 which has a protective layer in the surface where the said film layer and a mirror-like metallic luster ink layer contact | connect. A laminated sheet having a gloss value of 1300 or more produced by the method for producing a laminated sheet according to any one of claims 1 to 5.

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