JP5185653B2 - Laminate for producing nameplate - Google Patents

Description

  The present invention relates to a laminate for producing nameplates used for producing nameplates (including display plates and panels) used for home appliances, cosmetic mirror products, various mechanical devices and the like.

  In this type of nameplate-producing laminate, a decorative pattern is provided on one side of a base material (PET film) by printing a pattern or metallization, and an adhesive layer is provided on the opposite side. An in-mold molded product obtained by forming a decorative sheet, inserting the decorative sheet into an in-mold molding die, and injecting a molten resin (mainly used for a liquid crystal display unit of a portable information terminal device, etc. Display portion window) has been reported (see Patent Document 1). However, while this laminate for producing a nameplate can be produced at a low cost, there is a fine unevenness at the interface between the adhesive layer and the PET film or the interface between the injection resin and the adhesive layer, and the reflected light is distorted. When the reflected image is seen, it appears that there are innumerable scars such as yuzu skin, so that the design property is inferior.

In order to solve this point, in Patent Document 2, in a laminate for producing a nameplate having a laminated structure in which an adhesive layer and a metal vapor deposition film are laminated in order from the viewing side on the back side of a transparent substrate made of a synthetic resin. Disclosure that by prescribing the thickness of the PET film, distortion (fluctuation) due to reflected light can be eliminated, and when the reflected image of the fluorescent lamp is viewed, it is possible to prevent the skin-like scratches from being visible. There is.
Japanese Patent Laid-Open No. 2004-50778 JP 2007-152846 A

  However, the structure disclosed in Patent Document 2 has a problem in that external light such as a fluorescent lamp is reflected on the surface of the nameplate when visually recognized, and thus the design of the nameplate is impaired. It was.

  In view of such a current situation, an object of the present invention is to prevent reflection of external light such as a fluorescent lamp in a laminate for producing a nameplate formed by laminating a light reflecting layer with an adhesive layer on a transparent substrate. .

  As a result of various investigations to solve the above problems, the present inventors have blended a colorant and light diffusing fine particles into the pressure-sensitive adhesive layer in the laminate for producing a nameplate, and further mapping the laminate for producing the nameplate It has been found that by adjusting the measured value of nature to a specific range, the reflection of external light can be prevented, and the present invention has been completed.

  That is, the present invention is a laminate for producing a nameplate having a laminate structure in which a pressure-sensitive adhesive layer and a light-reflecting substrate that reflects light incident from the transparent substrate are sequentially laminated on a transparent substrate. The pressure-sensitive adhesive layer contains a color material (a) and light diffusing fine particles (b), and the image clarity measurement value of the laminate for producing a nameplate is 70 to 98.

  Preferably, the light diffusing fine particles have a volume average particle diameter of 2.0 to 30.0 μm, and in the pressure-sensitive adhesive layer, the amount of the light diffusing fine particles based on 100 parts by weight of the solid content of the pressure-sensitive adhesive is 0.00. 1 to 40 parts by weight.

  Preferably, the colorant (a) and the light diffusing fine particles (b) are contained at a weight ratio of (a) :( b) of 1: 1 to 30: 1 or 1: 1 to 1: 400. To do.

  Preferably, the transparent substrate is a light-transmitting sheet-like or plate-like molded body, and has a total light transmittance of 50% or more.

  By this invention, the laminated body for nameplate preparation which can prevent reflection of external light, such as a fluorescent lamp, can be provided. In addition, the laminate for producing a nameplate of the present invention has good dispersibility of fine particles in the pressure-sensitive adhesive layer, and is excellent in the surface feel and durability of the pressure-sensitive adhesive layer. Furthermore, in the present invention, since a color material is blended in the pressure-sensitive adhesive layer, it can be easily colored in an arbitrary color tone as compared with the case where the color material is kneaded with the resin.

  An example of a specific configuration of the laminate for producing a nameplate according to the present invention is shown in FIG. In FIG. 1, a pressure-sensitive adhesive layer 2 is laminated on a transparent substrate 1, and a light-reflective substrate 3 is laminated on the pressure-sensitive adhesive layer 2. The light-reflective substrate 3 is a so-called metal vapor deposition film, and includes a metal vapor deposition layer 3a and a base film 3b. The light reflective substrate 3 is laminated so that the metal vapor-deposited layer 3a and the pressure-sensitive adhesive layer 2 are in contact with each other.

(Transparent substrate)
The transparent base material that can be used in the laminate for producing a nameplate according to the present invention is not particularly limited in shape and material as long as it is a light-transmitting sheet-like or plate-like molded article. What consists of transparent resin which can be aimed at is preferable. Examples of such transparent resins include hydrophilic polymer films such as polyvinyl alcohol (PVA), partially formalized polyvinyl alcohol films, ethylene / vinyl acetate copolymer partially saponified films, polyethylene terephthalate (PET), and polycarbonate. A known transparent resin film such as (PC), polymethyl methacrylate (PMMA), triacetyl cellulose (TAC), polyarylate, polyimide, polyether, polycarbonate, cycloolefin resin, norbornene resin is preferably used. Can do. Among these, it is preferable to use PET, PC, PMMA, cycloolefin resin, and norbornene resin, which are particularly excellent in transparency and durability. The transparent substrate may be a laminate of known transparent resin films or a blended composite film. Furthermore, in order to improve the adhesiveness with the pressure-sensitive adhesive layer, it is preferable to subject the transparent substrate to a surface treatment such as a corona treatment, an alkali treatment, a plasma treatment, and an easy-adhesion resin layer coating treatment. The thickness of the transparent substrate is not particularly limited, but is preferably 500 μm or less from the viewpoint of ease of processing, and particularly preferably 10 to 250 μm from the viewpoint of weight reduction and transparency of the display device.

  The light transmittance of the transparent substrate is preferably 50% or more in terms of total light transmittance. When the total light transmittance of the transparent substrate is less than 50%, the color tone of the lower layer becomes unclear and reflection from outside light tends to occur. Further, a transparent substrate having a total light transmittance of 60 to 93% is preferable in terms of reducing reflection of light, making the layer structure inconspicuous, and further improving light diffusibility. A base material having a total light transmittance of more than 93% may cause a problem that the contribution of light diffusivity reaches its peak and the material cost increases.

(Adhesive layer)
As the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer, for example, acrylic, natural rubber-based, synthetic rubber-based, silicone-based, polyurethane-based, and epoxy-based pressure-sensitive adhesives can be used alone or in admixture of two or more. In the present invention, it is preferable to use a colorless and transparent pressure-sensitive adhesive. Among these, it is preferable to use an acrylic pressure-sensitive adhesive having high adhesive strength and excellent weather resistance, flexibility, and heat resistance. In the present invention, the acrylic pressure-sensitive adhesive easily disperses the colorant and light diffusing fine particles, which will be described later, reduces reflection of light, makes the layer structure inconspicuous, improves light diffusibility, and is inexpensive. It is preferable because there is something.

  The acrylic pressure-sensitive adhesive is a pressure-sensitive adhesive using an acrylic polymer that is mainly composed of alkyl (meth) acrylate and copolymerized with a polar monomer. The (meth) acrylic acid alkyl ester is an acrylic acid alkyl ester or a methacrylic acid alkyl ester, and is not particularly limited, but is methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, 2-ethylhexyl acrylate. , Isononyl acrylate, methyl methacrylate, ethyl methacrylate, n-butyl acrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate and the like.

  Polar monomers that copolymerize with (meth) acrylic acid alkyl esters are, for example, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, and 4-hydroxybutyl acrylate, hydroxyalkyl methacrylate, which are hydroxyalkyl acrylates. Hydroxyl group-containing monomers such as 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, and 4-hydroxybutyl methacrylate, unsaturated aliphatic carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, fumaric acid, and itaconic acid, N- Nitrogen-containing monomers such as vinylpyrrolidone, N-vinylcaprolactam, acryloylmorpholine, acrylamide, methacrylamide, glycidyl acrylate, glycidyl methacrylate Epoxy group-containing monomers such as bets and the like. The polar monomer acts as a crosslinking point when the acrylic polymer is crosslinked using a crosslinking agent.

  The acrylic polymer can be produced by various known methods. For example, a radical polymerization method such as a bulk polymerization method, a solution polymerization method, or a suspension polymerization method can be appropriately selected. Examples of the polymerization initiator include azo polymerization initiators such as azobisisobutyronitrile (AIBN), peroxide compounds such as lauroyl peroxide and benzoyl peroxide (BPO), benzophenone initiators such as benzophenone, 2-methyl A thioxanthone initiator such as thioxanthone and a benzoin ether initiator such as benzoin ethyl ether can be used, but an azo polymerization initiator such as azobisisobutyronitrile is particularly preferable from the viewpoint of polymerizability. Then, the acrylic polymer produced by the above method is dissolved in a solvent such as toluene, ethyl acetate, methyl ethyl ketone, etc. to prepare an acrylic polymer solution.

  The viscosity of the pressure-sensitive adhesive used in the present invention is preferably 500 to 6000 cps (23 ° C.), particularly 2000 to 6000 cps (23 ° C.) in view of dispersibility and dispersion stability of light diffusing fine particles described later and ease of pressure-sensitive adhesive layer formation. More preferably, it is 4000 cps (23 ° C.). If it is less than 500 cps, precipitation occurs in only 1 to 2 hours after dispersing the light diffusing fine particles in the adhesive, and if it is 6000 cps or more, it is difficult to uniformly disperse the colorant and light diffusing fine particles described later in the adhesive. It is not preferable.

  Furthermore, the pressure-sensitive adhesive used in the present invention includes, as necessary, a crosslinking agent, a crosslinking accelerator, a tackifier, a plastic, in addition to the colorant and the light-diffusing fine particles, as long as the light diffusion performance, the pressure-sensitive adhesive properties, etc. are not impaired. Various additives such as additives, fillers, ultraviolet absorbers, colorants such as dyes and pigments, antioxidants, flame retardants, antistatic agents, and light stabilizers can be added as appropriate to form an adhesive solution. .

  Examples of the crosslinking agent used in the acrylic pressure-sensitive adhesive include isocyanate compounds such as tolylene diisocyanate, hexamethylene diisocyanate, trimethylolpropane tolylene diisocyanate, diphenylmethane triisocyanate; bisphenol A, epichlorohydrin type epoxy resin, ethylene glycol Epoxy compounds such as glycidyl ether, polyethylene glycol diglycidyl ether, and glycerin diglycidyl ether; amine compounds such as hexamethylene diamine, triethyl diamine, and polyethylene imine; a variety of aluminum, iron, copper, zinc, tin, titanium, nickel, etc. Metal chelate compound in which a valent metal is coordinated to acetylacetone or ethyl acetoacetate; N, N′-diphenylmethane-4,4′-bis ( -Aziridinecarboxide), N, N'-toluene-2,4-bis (1-aziridinecarboxamide), triethylenemelamine, bisisophthaloyl-1- (2-methylaziridine), tri-1-aziridinyl Among aziridine compounds such as phosphine oxide, one kind or a mixture of two or more kinds can be used. A predetermined pressure-sensitive adhesive performance can be obtained by cross-linking the pressure-sensitive adhesive polymer mainly composed of an acrylic polymer with a crosslinking agent. The addition amount of the crosslinking agent is preferably 0.05 to 15 parts by weight in terms of solid content with respect to 100 parts by weight of the pressure-sensitive adhesive polymer. If the amount is less than 0.05 parts by weight, the pressure-sensitive adhesive is soft, so that the pressure-sensitive adhesive tends to protrude due to temperature rise or aging. If the amount exceeds 15 parts by weight, lamination becomes difficult due to insufficient adhesive force.

  Although the thickness of an adhesive layer is not specifically limited, It is preferable that the thickness after drying is 10 micrometers-100 micrometers, especially 15 micrometers-35 micrometers. If it is less than 10 μm, unintentional peeling or peeling is likely to occur due to insufficient adhesive strength, and the contribution of light diffusivity cannot be obtained. When the thickness exceeds 100 μm, there is a problem that the processing suitability is reduced and the cost is increased due to the sticking out of the adhesive at the time of producing the nameplate.

  The adhesive strength of the adhesive used is a value obtained by measuring the adhesive strength 20 minutes after being attached to a glass plate in accordance with JISZ0237 method, and is preferably in the range of 1 to 30 N / 25 mm. If it is less than 1 N / 25 mm, there is a possibility that the peeling from the adherend may occur in a high-humidity heat environment. If it exceeds 30 N / 25 mm, rework due to poor bonding may not be possible and productivity may be reduced.

In this invention, the image clarity measurement value of the laminated body for nameplate preparation is 70-98. The image clarity measurement value is measured by using a vision clarity measuring instrument so that the surface of the laminate for producing a nameplate is directed to the detector side at an angle of 60 degrees, and the optical comb is 2.0 mm. It is obtained as a numerical value of time. When the image clarity measurement value is less than 70, the color tone becomes unclear, and when it exceeds 98, reflection of light tends to occur and the desired light diffusivity cannot be obtained. The image clarity measurement value can be adjusted by the type of pressure-sensitive adhesive, the type of light diffusing fine particles described later, the particle size, the blending ratio, the blending ratio of the color material, and the like.

  The pressure-sensitive adhesive layer contains the color material (a) and the light diffusing fine particles (b). The weight ratio of the color material (a) and the light diffusible fine particles (b) is 1: 1 to 30: 1. Or it is preferable to contain in the ratio of 1: 1-1: 400. Furthermore, the range of 1: 1 to 10: 1 or 1: 1 to 1:30 is more preferable because the dispersibility of the light diffusing fine particles is good and reflection of reflected light is reduced. If the pressure-sensitive adhesive layer contains more than 1: 400 of the light diffusing agent fine particles (b) than the coloring material (a), the original color tone of the coloring material cannot be obtained, and more coloring material is contained than 30: 1. And the light diffusion effect is not exhibited.

  As the colorant to be blended in the pressure-sensitive adhesive layer in the present invention, pigments such as known organic pigments and inorganic pigments and colorants such as dyes can be suitably used. You may mix and use a pigment and dye as needed. Of these, organic pigments are preferred from the viewpoint of weather resistance and heat resistance. Specific examples of organic pigments include azo pigments, anthraquinone pigments, indigo pigments, thioindigo pigments, perylene / perinone pigments, quinacridone pigments, dioxazine pigments, quinophthalone pigments, isoindolinone pigments, pyrrole pigments, phthalocyanine pigments, aniline black Examples thereof include pigments and carbon black pigments. As such organic pigments, for example, anthraquinone pigments (CROMOPHTAL Blue A3R, CROMOPHTAL Red A2B) manufactured by Ciba Specialty Chemicals, phthalocyanine pigments (CROMOPHTAL Blue 4GN-P), and the like can be used. Examples of inorganic pigments include metal oxide pigments such as titanium oxide pigments and iron oxide pigments, chromate pigments, sulfide pigments, silicate pigments, carbonate pigments, and ferrocyan compounds. Is mentioned. It is desirable to use one or more selected from the above-mentioned organic pigments and inorganic pigments and having an average particle diameter of the pigment of 0.03 to 0.30 μm from the viewpoint of uniformly dispersing in the pressure-sensitive adhesive layer. .

  As the dye, one or more selected from basic dyes, acid dyes, direct dyes, acid mordant dyes, or mordant dyes can be used. There are various types of dyes, and chemical structures include azo dyes, anthraquinone dyes, triphenylmethane dyes, pyrazolone dyes, stilbene dyes, diphenylmethane dyes, azomethine dyes, xanthene dyes, alizarin dyes, acridine dyes, quinone imines. Examples include dyes (azine dyes, oxazine dyes, thiazine dyes), cyanine dyes, quinoline dyes, thiazole dyes, methine dyes, and nitro dyes. You may mix and use dye and a pigment.

  The color material that can be used in the present invention may be contained in a range that does not impair the light diffusibility of the pressure-sensitive adhesive layer, but 0.01 to 30 parts by weight with respect to 100 parts by weight of the solid content of the pressure-sensitive adhesive. Is preferable, and 0.1 to 5.0 parts by weight is more preferable. If it is less than 0.01 part by weight, it is difficult to obtain a color tone by containing a coloring material. When it exceeds 30 parts by weight, the transmittance of the pressure-sensitive adhesive layer is extremely lowered, and the light diffusibility is lowered.

  As the light diffusing fine particles used in the present invention, any organic or inorganic particles capable of diffusing light can be used. For example, fine particles comprising an acrylic resin, a styrene resin, a silicone resin, a silicone composite, or the like are used. The shape of the fine particles includes a spherical shape, an elliptical shape, and a needle shape. The volume average particle diameter of the fine particles is preferably 2.0 to 30.0 μm, and more preferably 3.0 to 6.0 μm. If the volume average particle size is less than 2.0 μm or exceeds 30.0 μm, it is difficult to obtain the desired light diffusion performance due to light scattering, and if it exceeds 30.0 μm, the diffusion performance is uneven due to fine particle aggregation. And stable light diffusion performance cannot be obtained. In addition, when acrylic resin fine particles are used for the acrylic adhesive layer, the effect of the light diffusing fine particles is difficult to be exhibited, so it is necessary to add a large amount. When fine particles of styrenic resin are used, haze is increased in addition to the light diffusion effect, which may hinder the color tone. From the above, fine particles made of silicone resin or silicone composite are preferably used. Such silicone resin fine particles and silicone composite fine particles are, for example, silicone powder “KMP” series (for example, KMP-590, KMP-701, X-52-854, KMP-600, KMP-601, KMP- 602, KMP-605, etc.), Toray Dow Corning's silicone elastomer powder “TREFIL” series (eg, E-506S, E-508, etc.), GE Toshiba Silicone silicone resin fine particle “Tospearl” series (eg, Tospearl 120, Tospearl 130, Tospearl 145, Tospearl 2000B, Tospearl 3120, etc.) can be used.

  The addition amount of the light diffusing fine particles is preferably 0.1 to 40 parts by weight with respect to 100 parts by weight of the solid content of the pressure-sensitive adhesive. If the amount is less than 0.1 parts by weight, the effect of preventing reflection cannot be achieved. If the amount exceeds 40 parts by weight, the effect of preventing reflection is not achieved, and the haze becomes too high, so that the color tone by adding a coloring material Is difficult to obtain. Furthermore, the surface feeling of the pressure-sensitive adhesive layer is lowered, and the presence of fine particles between the pressure-sensitive adhesive and the adherend may reduce the adhesive strength. Moreover, the durability of the laminate for producing the nameplate is lowered, and the film tends to float or peel over time, and foaming or the like is likely to occur. A more preferable addition amount is 1.0 to 40.0 parts by weight, and further preferably 1.0 to 5.0 parts by weight.

(Light reflective substrate)
The light-reflective substrate constituting the laminate for producing a nameplate of the present invention has light-reflecting performance, and its shape and material are not particularly limited as long as it is a sheet-shaped or plate-shaped molded body, for example, iron, stainless steel, Plating on the surface of sheet or plate-shaped molded products such as aluminum, SUS, titanium, chrome, gold, platinum, silver, copper, etc., alloy plates composed of two or more of the aforementioned metal atoms, or resin films and plates , Metal thin film layers such as iron, stainless steel, aluminum, SUS, titanium, chromium, gold, platinum, silver, and copper are formed by techniques such as vapor deposition and sputtering. Among these, as shown in FIG. 1, what is called a metal vapor deposition film comprised from a metal vapor deposition layer and a base film is preferable.

  The base film is not particularly limited as long as it is a sheet-like or plate-like molded body, but a PET film mainly composed of polyethylene terephthalate (PET), and cellulose triacetate (TAC) as a principal component. A TAC film etc. can be mentioned as a suitable example. Preferably, by setting the transmittance of the base film to 50% or less, it is possible to improve the effect of suppressing irregular reflection of light and preventing reflection of external light. The base film preferably has a thickness of 12 μm or more, and more preferably has a thickness of 38 μm to 188 μm.

In the Example of this invention, the metal vapor deposition film which used Cosmo Shine A4300 (brand name) by Toyobo Co., Ltd. was used as a base film. The metal vapor deposition layer can be formed, for example, by a method of vacuum depositing a metal such as aluminum, chromium, nickel, silver, or a method of sputtering these metals.
(Adhesive layer forming method)
The method for forming the pressure-sensitive adhesive layer is not particularly limited. For example, the pressure-sensitive adhesive solution may be formed into the above-described sheet form or the like by a known method such as a gravure printing method, a spray method, a dipping method, a roll coater method, or a die coater method. The pressure-sensitive adhesive layer can be formed by coating and drying the surface of the light-reflecting substrate made of a plate-shaped molded body on the metal vapor deposition layer side.

  Or, in the case of a highly reflective light-reflective substrate, such as a method of transferring a pressure-sensitive adhesive layer to a release film and transferring this to the surface of the light-reflective substrate on the metal vapor deposition layer side, When the adhesive layer provided with the adhesive layer on the release film is further covered with the release film and bonded to the plate-shaped molded article, the release film on one side of the adhesive layer is released, and the surface of the light reflective substrate A pressure-sensitive adhesive layer can be formed by pasting together.

  Thereafter, the laminate for producing a nameplate of the present invention can be produced by laminating a transparent substrate to the surface of the pressure-sensitive adhesive layer from which the release film covering the surface of the pressure-sensitive adhesive layer provided on the light-reflective substrate is peeled off. it can.

  Hereinafter, although this invention is demonstrated concretely using the laminated body for nameplate preparation of Examples 1-18 and Comparative Examples 1-6, this invention is not limited to these Examples.

  In each Example and Comparative Example, the type of pressure-sensitive adhesive, the type of light diffusing fine particles, the volume average particle size, and the amount added (the amount added in terms of solid content (parts by weight) relative to 100 parts by weight of the solid content of the pressure-sensitive adhesive) are It is as described in Table 1.

  The silicone resin and the silicone composite shown in Table 1 are light diffusing fine particles made of silicone having a three-dimensional cross-linking structure, and are listed above as light diffusing fine particles that can be used as a light diffusing agent. Either.

<Preparation of adhesive>
In Examples 1-18 and Comparative Examples 1-6, the transparent adhesive which has an acrylic polymer as a main component was used.

  The pressure-sensitive adhesive was prepared as follows. Among 100 parts by weight of the total amount of monomer components of the acrylic polymer, 99 parts by weight of n-butyl acrylate, 1 part by weight of 2-hydroxyethyl acrylate, and 0.2 part by weight of azobisisobutyronitrile are used. Each was added to a solvent of ethyl acetate and reacted at 70 ° C. for 6 hours to obtain an acrylic polymer solution having a solid content of 30% by weight. A pressure-sensitive adhesive solution was prepared by adding 0.5 parts by weight of trimethylolpropane tolylene diisocyanate as a crosslinking agent in terms of solid content to 100 parts by weight of the solid content of the obtained acrylic polymer solution.

<Addition of coloring material to adhesive solution (C)>
Moreover, what added the phthalocyanine-type organic pigment as a coloring material with respect to 100 weight part of solid content of an acrylic polymer solution so that it might become a weight part of Table 1 conversion of solid content with respect to a pressure-sensitive adhesive solution ( Adjusted as C).

<Addition of light diffusing fine particles to the adhesive solution (C)>
Furthermore, with respect to the pressure-sensitive adhesive solution (C), the light diffusing fine particles described in Table 1 are added so that the solid content is 100 parts by weight based on the solid content of the acrylic polymer solution so as to have a weight part described in Table 1 for 20 minutes. The light diffusing fine particles were dispersed by stirring to prepare a light diffusing pressure-sensitive adhesive solution.

<Viscosity of light diffusable adhesive solution>
After adjusting the light diffusable pressure-sensitive adhesive solution, the viscosity was measured with a B-type viscometer, and all were 3000 cps.

<Creation of laminate for nameplate production>
The thickness of the pressure-sensitive adhesive layer after drying the above-mentioned light diffusable pressure-sensitive adhesive solution on the release agent-coated surface of a release film made of a 75 μm PET film coated with a silicone release agent on one side using a comma coater is shown. After applying to the predetermined thickness of 1 and drying at 100 ° C. for 1 minute, an aluminum metal vapor deposition layer is formed on one side of a 100 μm thick base film (PET film, trade name: Cosmo Shine A4300, manufactured by Toyobo Co., Ltd.). The light-reflective substrate has an easy adhesion coat layer surface.

  It replaced with the peeling film and the laminated body for nameplate preparation was obtained by bonding the transparent base material of Table 1 together.

[Test and evaluation]
(Adhesive layer feel)
With respect to the laminates for producing nameplates obtained in Examples 1 to 18 and Comparative Examples 1 to 6, a surface on which a transparent substrate is provided with light from a 37 W fluorescent lamp on the laminate surface at an angle of 60 degrees from a distance of 20 cm It set so that it might hit from the side, the unevenness | corrugation of the adhesive layer was observed visually, and it evaluated based on the following reference | standard.
◎: Unevenness ○: Unevenness is slightly inferior, but there is no problem in use. △: Unevenness is partially observed.

(Reflection by reflected light)
With respect to the laminates for producing nameplates obtained in Examples 1 to 18 and Comparative Examples 1 to 6, a surface on which a transparent substrate is provided with light from a 37 W fluorescent lamp on the laminate surface at an angle of 60 degrees from a distance of 20 cm It set so that it might hit from the side, the reflection image of the fluorescent lamp was seen, reflection was observed visually, and it evaluated based on the following reference | standard.
A: No reflection of fluorescent light.
○: Almost no reflection of fluorescent light.
Δ: Fluorescent light reflected
X: Reflection of fluorescent light is conspicuous.

(Image clarity)
With the image clarity measuring device ICM-1 manufactured by Suga Test Instruments Co., Ltd., the transparent base material side surface of the laminate for producing nameplates is provided so as to face the detector side with an angle of 60 degrees, and the optical comb is 2.0 mm The image clarity was sought.

(Fine particle dispersibility)
With respect to the laminates for producing nameplates, which are colored products obtained in Examples 1 to 18 and Comparative Examples 1 to 6, the light of a 37 W fluorescent lamp is on the surface of the laminate at an angle of 60 degrees from a distance of 20 cm. The dispersibility of the fine particles was visually observed and evaluated based on the following criteria.
◎: No aggregate at all ○: Almost no aggregate △: Scattered aggregates are observed ×: There are aggregates

表１の結果より、実施例１〜１８により得られた銘板作製用積層体は、蛍光灯の写り込みを防止できるとともに、粘着剤層中での微粒子の分散性が良好であり、粘着剤層の面感や、耐久性に優れたものである。 (Durability test)
The laminates for producing nameplates obtained in Examples 1 to 18 and Comparative Examples 1 to 6 were allowed to stand for 500 hours in an 80 ° C. environment and a 60 ° C. × 95% RH environment, and then the film was floated, peeled off, and visually observed for foaming. Observations were made and evaluated based on the following criteria.
○: None of foaming, peeling or floating.
Δ: There is any of foaming, peeling or floating.
X: Foaming, peeling, and floating are all present.

From the results shown in Table 1, the laminates for producing nameplates obtained in Examples 1 to 18 can prevent the reflection of fluorescent lamps and have good dispersibility of fine particles in the pressure-sensitive adhesive layer. It has excellent surface feel and durability.

The conceptual diagram which shows the layer structure of the laminated body for nameplate preparation concerning this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transparent base material 2 Adhesive layer 3 Light reflective base material 3a Metal vapor deposition layer 3b Base film

Claims (3)

A laminate for producing a nameplate having a laminate structure in which a pressure-sensitive adhesive layer and a light-reflecting substrate that reflects light incident from the transparent substrate are sequentially laminated on a transparent substrate,
The pressure-sensitive adhesive layer contains the color material (a) and the light diffusing fine particles (b) in a weight ratio of (a) :( b) of 1: 1 to 30: 1 or 1: 1 to 1: 400 ,
The laminate for producing a nameplate, wherein the measured value of image clarity of the laminate for producing a nameplate is 70 to 98.   The light diffusing fine particles have a volume average particle diameter of 2.0 to 30.0 μm. In the pressure-sensitive adhesive layer, the light diffusing fine particles are added in an amount of 0.1 to 40 with respect to 100 parts by weight of the solid content of the pressure-sensitive adhesive. The laminate for producing a nameplate according to claim 1, wherein the laminate is a weight part. The laminate for producing a nameplate according to claim 1 or 2 , wherein the transparent substrate is a light-transmitting sheet-like or plate-like molded article, and has a total light transmittance of 50% or more.

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