JP5313721B2 - Pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive composition that forms an adhesive sheet having an extremely small initial tack, firmly bonding with time, easily adjusting an application position of adhesive sheet to a resin coating surface of urethane coating, melamine coating, epoxy coating, etc., and has little concern for occurrence of problem of air mingling during application, and an adhesive sheet using the same. <P>SOLUTION: A peeling material 6 is coated with the pressure-sensitive adhesive composition comprising a urethane-modified polyester resin having a glass transition point of &le;30&deg;C, a hydroxy value of 0.1-20 KOHmg/g and a number-average molecular weight of 10,000-100,000, a plasticizer and, if necessary, a crosslinking agent to form a pressure-sensitive adhesive layer 3. A sheet substrate 2 is attached to the pressure-sensitive adhesive layer to give the adhesive sheet 1. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a pressure-sensitive adhesive composition and a pressure-sensitive adhesive sheet using the same, and more specifically, a pressure-sensitive adhesive for display / design pressure-sensitive adhesive sheets and decorative / display pressure-sensitive adhesive sheets such as labels, stickers and stripes ( The present invention relates to a pressure-sensitive adhesive composition that can be suitably used as a pressure-sensitive adhesive) and a pressure-sensitive adhesive sheet using the same.

  The adhesive sheet basically consists of a release material, an adhesive layer, a sheet substrate, a decorative display layer such as an ink layer provided as necessary, a protective clear layer, and in some cases an application sheet. Configured. Conventionally, an adhesive sheet is stuck on various adherends for various purposes. For example, examples of the use of adhesive sheets include display / design adhesive sheets, decoration / display labels, stickers, stripes, etc. used as paint substitutes that are attached to automobiles, buses, etc. . In addition, these display / design adhesive sheets, decoration / display labels, stickers, stripes, etc. are used for vessels such as interior / exterior products, home appliances, office equipment, play equipment, toys, other furniture, and building interior materials. It is also widely used for the purpose of giving decoration, display, etc. to the kimono. In many cases, these adherends have a resin coating or the like on their surfaces, and are relatively smooth, so that they do not slip easily and do not slip, so the size of the sheet to be applied increases. Accordingly, it has been pointed out that positioning becomes difficult and air is easily caught between the adherend and the sheet, and so-called air biting occurs. In order to prevent the entrainment of air, a considerable skill is required for attaching the pressure-sensitive adhesive sheet, and a considerable amount of labor and time are required for the work. Therefore, various improvement methods have been proposed.

  As such an improvement method, for example, a large number of small convex portions independent of the pressure-sensitive adhesive layer are arranged in a dotted shape (see Patent Documents 1 and 2), and an air circulation path is provided on the pressure-sensitive adhesive surface (Patent Document 3). For example, a pressure-sensitive adhesive layer in which a groove is formed between adjacent convex portions (see Patent Document 4), an air flow path is formed on the pressure-sensitive adhesive surface of the pressure-sensitive adhesive sheet, and the pressure-sensitive adhesive sheet is attached when the pressure-sensitive adhesive sheet is applied. There is a method in which air remaining between the pressure-sensitive adhesive surface and the adherend is allowed to escape through this air flow path so that air does not accumulate. However, in this method, the adhesion with the adherend is insufficient, the uneven structure or the groove structure is raised on the surface of the substrate, the appearance of the adhesive sheet after application is impaired, or through the adhesive groove It has drawbacks such as water, chemicals, etc. permeating and lowering the adhesive strength, and is not always satisfactory.

  As another method, a non-adhesive pattern forming agent is applied on a release sheet to form a non-adhesive pattern, then an adhesive is applied, and a sheet base material is adhered to the formed adhesive layer. There is a method using a pressure-sensitive adhesive sheet (see Patent Document 5).

  However, in this method, the air entrained at the time of application or the gas generated by the adherend escapes in a form that pushes the gap between the base material and the non-adhesive pattern. There was a problem that the removal was not smooth, and the pressure-sensitive adhesive layer floated up when it was spread, leaving irregularities. In addition, if there is a temperature rise after sticking, the non-adhesive part will tack and adhere to the adherend, so that not only the above phenomenon will be noticeable, but also the remaining air or gas will not escape during sticking There is also a problem.

  As another method, a method of forming an adhesive layer made of elastic microspheres and an adhesive on the surface of a sheet base material has been proposed (see Patent Documents 6 and 7). However, in this method, if the elastic microsphere is increased to 100 to 300 μm, it is effective for preventing air bite, but unevenness is likely to occur on the surface of the support film after being attached, and it is difficult to maintain a good appearance. In order to improve this defect, if it is attempted to secure a good appearance by reducing the particle diameter to 10 μm or less, it becomes difficult to remove air bubbles between the pressure-sensitive adhesive layer and the adherend. End up. Therefore, proposals have been made to make the particle size 10 to 100 μm. However, in the case of a thin soft film with a base material thickness of 50 μm or less, unevenness is raised on the surface as usual, and the effect of improving the appearance is not sufficient, and these Depending on the method, it is not possible to cope with the problem that repositioning can be performed in a short time without easily positioning the adhesive sheet or damaging the adhesive sheet.

  Moreover, even when a sheet having a not so large area is used, when sticking an adhesive sheet on an adherend having a three-dimensional curved surface, the entire surface of the adherend does not float on the three-dimensional curved surface at once. It is usually not easy to apply it cleanly in close contact. For this reason, conventionally, using a plastic squeegee, a method of applying the adhesive label while partially extending it in conformity with the curved surface while repeatedly applying and peeling off has been adopted. Yes. However, in the case of a pressure-sensitive adhesive with high adhesive strength, the pressure-sensitive adhesive also deforms at the time of peeling, etc., and squeegee marks and peeling marks are often noticeable, especially when the substrate thickness of the label is thin or metal film is deposited. In the case of having a beautiful surface such as a hologram or the like, there are problems that the peeling mark at the time of pasting appears prominently and the decorative effect on the surface is impaired.

Utility Model Registration No. 2503717 Utility Model Registration No. 2587198 JP 63-223081 A JP 11-209704 A JP 2001-234130 A JP-A-6-287525 Japanese Patent Laid-Open No. 8-113768

  The present invention has been made in order to solve the above-mentioned conventional problems, and the initial adhesiveness is extremely weak even on resin coating surfaces such as urethane coating, melamine coating, and epoxy coating, and the adhesive sheet can be easily attached to the position. It is an object of the present invention to provide a pressure-sensitive adhesive (pressure-sensitive adhesive) composition capable of forming a pressure-sensitive adhesive sheet that is less likely to cause air biting problems when applied.

  In addition, the present invention can be applied neatly without forming a concavo-convex pattern of the pressure-sensitive adhesive layer for air release at the time of application or punching a sheet substrate for air release. An object of the present invention is to provide a pressure-sensitive adhesive composition for use in pressure-sensitive adhesive labels and pressure-sensitive adhesive sheets, which is less likely to reduce the decorative commercial value at the time of application.

  Another object of the present invention is to provide a pressure-sensitive adhesive sheet that is easy to adjust the sticking position and is less likely to cause air biting problems without forming a special structure in the pressure-sensitive adhesive layer or the like.

  Another object of the present invention is to provide an adhesive sheet for display / design, a decoration / display label, a sticker, a stripe, and the like that can be easily attached to a three-dimensional curved surface.

  Another object of the present invention is to provide an adhesive sheet in which a decorative pattern such as a hairline pattern or a hologram pattern is formed as a decorative display layer by a bright film.

  Moreover, an object of this invention is to provide the decoration body decorated by sticking of the said adhesive sheet.

  As a result of intensive studies and examinations, the present inventor has obtained a pressure-sensitive adhesive composition by adding a urethane-modified polyester resin having a specific physical property and a plasticizer or a cross-linking agent to this to form a pressure-sensitive adhesive composition. It has been found that the above object can be achieved by forming a pressure-sensitive adhesive sheet using the obtained pressure-sensitive adhesive composition, and the present invention has been made based on these findings.

  That is, the present invention provides the following pressure sensitive adhesive compositions (1) to (14), pressure-sensitive adhesive sheets, pressure-sensitive adhesive sheets for display / design, pressure-sensitive adhesive sheets for decoration / display, labels or design sheets, It is related with the decoration body which stuck.

(1) From a urethane-modified polyester resin having a glass transition point of 30 ° C. or lower, a hydroxyl value of 0.1 to 20 KOHmg / g, and a number average molecular weight of 10,000 to 100,000, and a plasticizer compatible with the resin A pressure-sensitive adhesive composition characterized by comprising:

(2) The pressure-sensitive adhesive composition as described in (1) above, wherein the plasticizer is a polyester plasticizer.

(3) Further, the crosslinking agent capable of crosslinking the urethane-modified polyester resin is blended in an amount equal to or less than the equivalent of the hydroxyl value of the urethane-modified polyester resin, as described in (1) or (2) above Sheet base material.

(4) The pressure-sensitive adhesive composition as described in (3) above, wherein the crosslinking agent is a melamine-based multifunctional crosslinking agent or an isocyanate-based multifunctional crosslinking agent.

(5) A pressure-sensitive adhesive sheet in which a pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition according to any one of (1) to (4) is provided on one surface of a sheet substrate.

(6) The pressure-sensitive adhesive sheet according to (5), wherein a decorative display layer is provided on a surface opposite to the surface of the sheet substrate on which the pressure-sensitive adhesive layer is provided.

(7) The pressure-sensitive adhesive sheet as described in (6) above, wherein a protective clear layer is provided on the decorative display layer.

(8) The pressure-sensitive adhesive sheet as described in (7) above, wherein a sticking auxiliary member (application sheet) for assisting in the work of sticking the pressure-sensitive adhesive sheet to the adherend is further laminated on the protective clear layer. .

(9) The pressure-sensitive adhesive sheet according to any one of (5) to (8) above, wherein a release material is provided on the surface of the pressure-sensitive adhesive layer.

(10) The pressure-sensitive adhesive sheet as described in any one of (5) to (9) above, wherein a metal thin film layer is provided on a surface of the sheet base material which is in contact with the pressure-sensitive adhesive layer.

(11) After forming a fine emboss on the surface of the sheet base material in contact with the pressure sensitive adhesive layer, a metal thin film layer or a layer in which any one of metal oxide, metal sulfide, and metal fluoride is formed in a thin film is provided. The pressure-sensitive adhesive sheet according to any one of (5) to (9) above,

(12) The pressure-sensitive adhesive sheet according to any one of (5) to (11) above, wherein the pressure-sensitive adhesive sheet is a display / design pressure-sensitive adhesive sheet, or a decoration / display pressure-sensitive adhesive label, a sticker, or a stripe. .

(13) A decorative body to which the pressure-sensitive adhesive sheet for display / design or the pressure-sensitive adhesive label for decoration / display, a sticker or a stripe is attached.

(14) The decorative body according to (13), wherein a label or a design sheet is pasted and then further overcoated with a transparent resin.

  Conventionally, acrylic and rubber pressure-sensitive adhesives generally used for pressure-sensitive adhesive sheets did not provide sufficient adhesion performance when the initial adhesiveness was lowered, but the pressure-sensitive adhesive composition of the present invention hardly had initial adhesion. Nevertheless, strong adhesiveness can be secured by standing at room temperature or heating.

  In addition, the pressure-sensitive adhesive composition of the present invention has a very low initial adhesiveness even on a resin-coated surface such as urethane coating, melamine coating, and epoxy coating, to which the pressure-sensitive adhesive composition is easily bonded (for example, The pressure-sensitive adhesive composition of the present invention was used in which the adhesive strength of the pressure-sensitive adhesive layer within 1 minute after applying the pressure-sensitive adhesive sheet to the resin-coated surface was 180 ° peel (Peel adhesive strength) of 3 N / 25 mm or less. Even when affixing an adhesive sheet to such an adherend, it is easier to correct the application position than conventional pressure-sensitive adhesives, which are difficult to correct the application position due to partial adhesion during application, It becomes possible to paste it exactly on the originally planned location.

  In addition, since the pressure-sensitive adhesive composition of the present invention has an extremely low initial adhesiveness, not only the air biting phenomenon that occurs at the time of sticking hardly occurs, but also the air trapped by pressing with a squeegee can be easily discharged. .

  Therefore, by using the pressure-sensitive adhesive composition of the present invention, even in the case of a pressure-sensitive adhesive sheet having a large area, it becomes possible to affix the pressure-sensitive adhesive sheet to an accurate position in a short time without requiring skill, etc. The efficiency of the pasting workability becomes extremely high.

  Conventionally, when sticking an adhesive sheet on a three-dimensional curved surface, a method of sticking while stretching it into a shape that matches the shape of an adherend using a stretchable base material is generally employed. In the pressure-sensitive adhesive sheet, almost no deformation of the pressure-sensitive adhesive at the time of peeling (peeling marks) occurs, and even if the sheet is decorated with a metallic luster or hologram, the marks are inconspicuous, The adherend can be given a beautiful and direct pattern such as metal plating or hologram processing.

  In addition, by selecting a material that is highly stretchable and easily plastically deformed for the base film, the adhesive sheet can be easily and in a relatively short time without any skill by pressing with a squeegee at the time of application. Can be affixed.

  The pressure-sensitive adhesive composition of the present invention exhibits the above-mentioned specific adhesive properties even when only a combination of a urethane-modified polyester resin and a polyester plasticizer is exhibited, and exhibits high adhesive strength in about 24 hours even after standing at room temperature. However, if a process such as overcoating is required afterwards because of non-crosslinking, there may be a problem with solvent resistance, etc., but crosslinking with a crosslinking agent may cause problems such as solvent resistance of the pressure sensitive adhesive itself. The physical properties can be improved, so that even when a protective clear coating (overcoat) is applied after application, swelling, wrinkles, and edge lifting caused by the penetration of the solvent of the paint into the pressure-sensitive adhesive from the edge side There is no risk of malfunction. Depending on the degree of crosslinking, the rate of increase in adhesive strength at room temperature after application is slower than that of uncrosslinked products, and it may take 2 to 3 times longer to achieve high adhesive strength. This can be solved by adding a heating process at 80 ° C. for about 10 minutes.

  Moreover, after performing overcoat with the said transparent resin, a durable beautiful decoration can be performed by performing baking etc.

It is typical sectional drawing of an example of the adhesive sheet using the pressure sensitive adhesive composition of this invention. It is typical sectional drawing of the adhesive sheet of this invention which has bright fine patterns, such as a hologram pattern.

  The pressure-sensitive adhesive composition of the present invention comprises a urethane-modified polyester resin having a glass transition point of 30 ° C. or lower, a hydroxyl value of 0.1 to 20 KOH mg / g, and a number average molecular weight of 10,000 to 100,000, and the resin. A cross-linking agent which is made of a plasticizer having compatibility with the above, or further capable of cross-linking the urethane-modified polyester resin is blended as necessary. Hereinafter, the components constituting the pressure-sensitive adhesive composition of the present invention will be described in detail.

(Urethane-modified polyester resin)
The urethane-modified polyester resin used in the pressure-sensitive adhesive composition of the present invention is a solvent-soluble resin obtained by reacting a polyester polyol and a polyisocyanate at an excess ratio of the hydroxyl groups of the polyester polyol. It preferably has 2 or more hydroxyl groups.

  The polyester polyol used in producing the urethane-modified polyester resin is a resin having two or more hydroxyl groups in one molecule obtained by esterifying a polybasic acid and a polyhydric alcohol. Examples of the polybasic acid that is a starting material for producing the polyester polyol include polyvalent carboxylic acids having two or more carboxyl groups in one molecule. Examples of the polycarboxylic acid include aliphatic dibasic acids such as malonic acid, succinic acid, glutaric acid, adipic acid, sebacic acid, azelaic acid, and dodecanedicarboxylic acid, phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid And aromatic polybasic acids such as pyromellitic acid and aliphatic polybasic acids such as butanetricarboxylic acid, tricarbaryl acid, citric acid and the like. In the present invention, only an aliphatic dibasic acid may be used as the polybasic acid, but the main component is an aliphatic dibasic acid, and a small percentage of the aromatic polybasic acid or aliphatic polybasic acid is added thereto. What was mix | blended may be used. Moreover, these dibasic acids or polybasic acids may be used individually by 1 type, and 2 or more types may be used together.

  Moreover, as a polyhydric alcohol, the compound which has a 2 or more hydroxyl group in 1 molecule, such as a bivalent alcohol or a trihydric or more polyhydric alcohol, is used. Examples of the divalent alcohol include ethylene glycol, diethylene glycol, 1,2-propanediol, 1,3-propanediol, 2-methyl-1,3-propanediol, and 2,2-dimethyl-1,3-propane. Diol, 2,2-diethyl-1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,5-hexanediol, 1,6-hexanediol, 3-methyl-1,5-pentanediol, 2-ethyl-1,3-hexanediol, 2,2,4-trimethyl-1,3-pentanediol, etc. are more than trivalent Examples of polyhydric alcohols include aliphatic glycol, glycerin, trimethylolpropane, trimethylolethane, and pentaerythritol. Etc. The. In the present invention, only a dihydric alcohol may be used as the polyhydric alcohol, or a dihydric alcohol such as an aliphatic glycol is used as a main component, and a small proportion of the polyhydric alcohol is used. It is preferable that the main component is aliphatic glycol. These divalent alcohols or polyhydric alcohols may be used alone or in combination of two or more.

  Furthermore, a polyester polyol compound obtained by a ring-opening reaction of caprolactone may be used as the polyester polyol.

  On the other hand, the polyisocyanate compound reacted with the polyester polyol is a compound having two or more free isocyanate groups in one molecule. Specifically, hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, lysine diisocyanate and trimethylene Aliphatic diisocyanates such as diisocyanates; alicyclic diisocyanates such as isophorone diisocyanate, methylenebis (cyclohexyl isocyanate) and cyclohexane diisocyanate; aromatic diisocyanates such as xylene diisocyanate, tolylene diisocyanate, diphenylmethane diisocyanate, naphthalene diisocyanate and biphenylene diisocyanate; . These may be used individually by 1 type and 2 or more types may be used together.

  The reaction conditions of the usual urethanization reaction can be widely applied to the reaction between the polyester polyol and the polyisocyanate compound.

  In the present invention, a urethane-modified polyester resin having a glass transition point of 30 ° C. or lower, a hydroxyl value of 0.1 to 20 KOHmg / g, and a number average molecular weight of 10,000 to 100,000 is used. When it exceeds 30 ° C., the adhesion between the adhesive layer and the adherend is lowered, and the adhesive strength after 24 hours becomes insufficient. On the other hand, if the hydroxyl value is less than 0.1, sufficient crosslinkability cannot be obtained, and if it exceeds 20, the initial adhesiveness becomes strong and the workability of attaching is inferior. Also, if the number average molecular weight is less than 10,000, the cohesive force is small and the adhesive strength (retention property) after aging or heating is insufficient, causing problems such as deviation of the adhered adhesive sheet and sticking out of the glue, and the number average molecular weight. Is more than 100,000, the solution viscosity becomes high and the coating property becomes poor. Therefore, the blending ratio of the polyester polyol and the polyisocyanate compound is set to a blending ratio for obtaining the urethane-modified polyester resin as described above according to the structure and characteristics of the polyester polyol and the polyisocyanate compound.

  Urethane-modified polyester resins having the above properties are known per se, and are also commercially available, for example, as Byron UR-3200, 3500 or 8700 (trade name, manufactured by Toyobo).

(Plasticizer)
As a plasticizer compatible with the urethane-modified polyester resin used in the pressure-sensitive adhesive composition of the present invention, a conventionally known plasticizer (for example, a phthalate ester) may be used as long as it is compatible with the urethane-modified polyester resin. , Epoxy resins such as adipic acid ester, sebacic acid ester, trimellitic acid ester, phosphoric acid ester, citric acid ester, epoxidized soybean oil, and maleic acid ester) Among them, polyester plasticizers are preferable.

  The polyester plasticizer is usually produced by condensing a polybasic acid component and a polyhydric alcohol component, if necessary, using a monohydric alcohol and / or a monobasic acid as a terminal terminating component. Is used.

  Examples of the polybasic acid component include polybasic acids similar to those used in the production of urethane-modified polyester resins, such as malonic acid, succinic acid, glutaric acid, adipic acid, sebacic acid, azelaic acid, and dodecanedicarboxylic acid. Aliphatic dibasic acids such as phthalic acid, etc. or aromatic polybasic acids such as phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, pyromellitic acid, or butanetricarboxylic acid. , Tricarballylic acid, citric acid and other aliphatic polybasic acids. These aliphatic dibasic acids and polybasic acids may be used alone or in combination of two or more.

  Examples of the polyhydric alcohol component include ethylene glycol, diethylene glycol, 1,2-propanediol, 1,3-propanediol, 2-methyl-1,3-propanediol, and 2,2-dimethyl-1,3-propanediol. 2,2-diethyl-1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,5-hexanediol, Aliphatic glycols such as 1,6-hexanediol, 3-methyl-1,5-pentanediol, 2-ethyl-1,3-hexanediol, 2,2,4-trimethyl-1,3-pentanediol, or the like A small percentage of glycerin, trimethylolpropane, trimethylolethane, pentaerythritol Polyhydric alcohols can be mentioned those formulated. An aliphatic glycol and a polyhydric alcohol may be used individually by 1 type, and 2 or more types may be used together.

  Examples of the terminal termination component include methanol, ethanol, propanol, isopropanol, butanol, sec-butanol, isobutanol, hexanol, isohexanol, heptanol, isoheptanol, octanol, isooctanol, 2-ethylhexanol, isononyl alcohol, and isodecanol. Aliphatic monohydric alcohols such as isoundecanol, isotridecyl alcohol, benzyl alcohol, and acetic acid, propionic acid, butyric acid, isobutyric acid, octylic acid, 2-ethylhexylic acid, lauric acid, myristic acid, palmitic acid, stearic acid And aliphatic monobasic acids such as 12-hydroxystearic acid.

  The reaction conditions of the usual esterification reaction can be widely applied to the reaction between the polybasic acid and the polyhydric alcohol. In addition, the blending ratio of each of the above components may be set so as to obtain the type of component to be used, the characteristics of the target polyester plasticizer, the molecular weight, and the like.

  As the polyester-based plasticizer, those adjusted in accordance with the compatibility with the urethane-modified polyester resin can be used as appropriate, but those having a number average molecular weight of 600 to 5,000 are preferable, and more preferably 800 to 4 The acid value is preferably 1 or less, and the hydroxyl value is preferably 10 or less.

  Such polyester plasticizers are known per se, and are commercially available, for example, as Adekasizer PN-150 or PN-350 (manufactured by Adeka, trade name) [both are adipic acid-based polyesters].

  The addition amount of the polyester plasticizer is usually 5 to 40 parts by weight, preferably 10 to 30 parts by weight with respect to 100 parts by weight of the urethane-modified polyester resin.

(Crosslinking agent)
Even a pressure-sensitive adhesive composition composed of the above urethane-modified polyester resin and a plasticizer has a low initial adhesive strength and then exhibits a high adhesive strength with time and heating, but the blend is thermoplastic. Therefore, when exposed to high temperature or prolonged exposure, the applied pressure-sensitive adhesive may protrude, and when overcoating from the top of the adhesive sheet, it may depend on the solvent contained in the overcoat. It may be affected, and there is a risk of causing appearance defects such as wrinkles, blisters, and edge turning. For this reason, it is preferable to add and bridge | crosslink a crosslinking agent in the range below an equivalent with respect to the residual hydroxyl group of urethane-modified polyester resin. As such a crosslinking agent, any of conventionally known crosslinking agents such as a polyfunctional crosslinking agent that reacts with and crosslinks the residual hydroxyl group of the urethane-modified polyester resin, such as a melamine resin and a polyfunctional isocyanate compound, can be used.

  When a melamine resin is used as a crosslinking agent, it is added within a range equal to or less than the residual hydroxyl group of the urethane-modified polyester resin, and is applied to a release paper or substrate film in the presence of an acidic catalyst such as a phosphate ester, and heated. By drying and causing a melamine crosslinking reaction, the above problems can be avoided. Examples of the melamine resin include high solid perfect alkyl type, methylol group type, imino type, and methylol-imino group type melamine resin. The melamine resin used in the present invention is required to be low-temperature crosslinkable due to the heat resistance of the material (release paper or substrate film) used. For this reason, imino group-containing melamine resins are preferred. It is desirable that the number of imino groups in the imino group-containing melamine resin is 1 or more, preferably 2 or more, per molecule. Such an imino group-containing melamine resin is known per se, and is also commercially available, for example, as “Cymel 701” (trade name, manufactured by Mitsui Cyanamid Co., Ltd.).

  When using a polyfunctional isocyanate compound as a cross-linking agent, the polyfunctional isocyanate compound is blended within a range equal to or less than the residual hydroxyl group of the urethane-modified polyester resin in the same manner as the melamine resin, and a predetermined amount is applied to a release paper or a base film, It can bridge | crosslink by aging at room temperature for 1 week after drying by heating. Examples of the polyfunctional isocyanate resin used in the present invention include the above-described polyisocyanate compounds and their trimethylolpropane adducts, burettes reacted with water, and trimers having an isocyanurate ring. Accordingly, known catalysts such as dibble tin dilaurate and quaternary amine can be used as the urethanization catalyst.

  Moreover, various additives, such as antioxidant, a ultraviolet absorber, a light stabilizer, a softening agent, a silane coupling agent, a filler, can be added to a pressure sensitive adhesive composition as needed. These additives may be used in an appropriate amount depending on the type.

  For example, the antioxidant may be any as long as it is conventionally known as an antioxidant for pressure-sensitive adhesive compositions, and is not particularly limited, but is phenol-based (monophenol-based, Bisphenol type, polymer type phenol type), sulfur type, phosphorus type and the like.

  Examples of the ultraviolet absorber include salicylate-based, benzophenone-based, benzotriazole-based, and cyanoacrylate-based, and benzophenone-based ultraviolet absorbers and benzotriazole-based ultraviolet absorbers are particularly preferable from the viewpoint of the ultraviolet absorption effect. A benzotriazole-based ultraviolet absorber is preferred.

  As the light stabilizer, for example, a light stabilizer such as a hindered amine or hindered phenol can be used.

  Furthermore, the pressure-sensitive adhesive composition of the present invention may contain a solvent that dissolves a urethane-modified polyester resin, a plasticizer, a crosslinking agent, and the like, if necessary. Solvents include benzene, toluene, xylene, ethyl acetate, methyl acetate, butyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, methanol, ethanol, n-propanol, isopropanol, sec-butanol, t-butanol, n-hexane, cyclohexane , Cyclohexanone, n-heptane, methyl cellosolve, ethyl cellosolve, propylene glycol monoethers, propylene glycol monoether esters, and the like.

  The pressure-sensitive adhesive sheet of the present invention is produced using the pressure-sensitive adhesive composition. An example of the layer structure of the pressure-sensitive adhesive sheet of the present invention is shown in FIG. As shown in FIG. 1, the pressure-sensitive adhesive sheet is usually a release paper 6 such as a release paper, a release sheet, and a pressure-sensitive adhesive layer (pressure-sensitive adhesive layer) 3 made of the pressure-sensitive adhesive composition of the present invention. These are basically composed of a sheet base material 2 and, if necessary, a decorative display layer 4 such as an ink layer, a protective clear layer 5 and, in some cases, an application sheet are sequentially laminated.

  The pressure-sensitive adhesive composition of the present invention can be applied to the sheet substrate 2 or the release material 6 by an ordinary application method to form an adhesive sheet. As the sheet base material 2, any conventionally known base material for pressure-sensitive adhesive sheets, such as vinyl chloride film, polyolefin film, (meth) acrylic film, polyester film, thermoplastic polyurethane film, UV curable film, etc. Can be used. If the base film is a film with high heat resistance, solvent resistance, strength, such as polyester film, apply the above composition directly on the film, and after drying, apply a release material such as release paper or release film. Together, it can be used as an adhesive sheet. In addition, if the base film is a film with low heat resistance, solvent resistance, strength, or stretchable film, such as a vinyl chloride (polyvinyl chloride) film, a polyurethane film, or a polyolefin film, A pressure-sensitive adhesive sheet is produced by applying the above composition, drying, and bonding the base film.

  In addition, when a material having a large stretchability and a low modulus value (stress when a certain strain is applied) is used as the base film, an adhesive sheet having extremely high suitability for bonding to a three-dimensional curved surface can be obtained. Examples of such a material include a soft PVC film, a soft urethane film or an ultrathin urethane film, an ultrathin PVC film, an ultrathin polyester film, or a urethane-modified polyester resin, a polyfunctional crosslinking agent and a plasticizer. The film etc. which were formed by are mentioned.

  Various additives such as antioxidants, ultraviolet absorbers, light stabilizers, antistatic agents, flame retardants, and coloring agents such as dyes and pigments may be blended in the sheet base material as necessary. These additives are used in an appropriate amount depending on the type.

  When these additives are further described, examples of the antioxidant, the ultraviolet light inhibitor and the light stabilizer are the same as those described for the additive to the pressure-sensitive adhesive composition.

  The antistatic agent is not particularly limited, and examples thereof include a quaternary amine salt monomer. Examples of the quaternary amine salt monomer include dimethylaminoethyl (meth) acrylate quaternary chloride, diethylaminoethyl (meth) acrylate quaternary chloride, methylethylaminoethyl (meth) acrylate quaternary chloride, p- Examples thereof include dimethylaminostyrene quaternary chloride and p-diethylaminostyrene quaternary chloride, and dimethylaminoethyl methacrylate quaternary chloride is preferably used.

  The flame retardant is not particularly limited, for example, brominated flame retardants, inorganic flame retardants such as aluminum hydroxide, magnesium hydroxide, antimony trioxide, melamine cyanurate, urea, triazine ring-containing compounds including melamine derivatives, Organic flame retardants, such as phosphate esters, such as aromatic polyphosphate, are mentioned.

  As the colorant, any of known or well-known colorants such as organic pigments, inorganic pigments, dyes, and carbon black can be used. The color is arbitrary, and can be, for example, white, ivory, black, red, blue, yellow, green, and the like. When the film substrate has a multilayer structure, a colorant may be added to all layers, or a colorant may be added to only a part of the layers. Examples of pigments include, for example, phthalocyanine, azo, condensed azo, azo lake, anthraquinone, perylene / perinone, indigo / thioindigo, isoindolinone, azomethine azo, dioxazine, quinacridone, Organic pigments such as aniline black, triphenylmethane, carbon black, titanium oxide, iron oxide, iron hydroxide, chromium oxide, spinel firing, chromic acid, chromium vermilion, bitumen , Aluminum powder system, bronze powder system and the like. These pigments may be in any form, and these pigments may be subjected to various dispersion treatments by various known methods.

  In FIG. 1, an ink layer by printing is applied as a decorative display layer on the sheet base material 2 for decoration or display, but when the sheet base material is colored, the color of the base material is not printed. It is good also as a label and a design sheet which made use of. The printing layer may be multicolor printing, and a plurality of ink layers may be laminated. When a decorative pattern such as a character or a picture is formed using colored printing ink, for example, a known printing method such as screen printing, offset printing, gravure printing, flexographic printing, or the like can be used. A transparent or translucent clear ink layer may be provided. Further, as a decorative display layer, a metal or the like may be applied as a thin film by vacuum plating (vacuum deposition, sputtering, ion plating, etc.). Furthermore, the decoration display layer may be a combination of a printed layer and a metal thin film layer, or may be affixed (for example, foil pressing) with a decoration material thin film.

  Thus, the decorative display layer provided on the decorative adhesive sheet or the like of the present invention is not particularly limited, and is conventionally used as a well-known or well-known decorative display layer as a decorative display layer of a conventional pressure-sensitive adhesive sheet. Any device may be used as long as it produces a decorative effect and a display effect. Further, the formation method is not particularly limited.

  The decorative display layer may be provided on the pressure-sensitive adhesive layer surface of the sheet base material. The decorative display layer provided on the pressure-sensitive adhesive layer surface of the sheet base material may be a printed layer or a metal thin film layer similar to the decorative display surface provided on the surface opposite to the pressure-sensitive adhesive layer of the sheet base material. Good. Also, embossing is stamped on the surface of the adhesive layer of the sheet base material by heat or pressure, or after applying a resin that cures with ultraviolet rays, it is bonded to the mold and irradiated with ultraviolet rays to transfer the fine embosses, followed by vacuum plating. By performing, a hologram pattern, a hairline pattern, etc. may be given. It is preferable to form a fine pattern on a sheet base material or a fine pattern on a resin layer that is cured by ultraviolet rays or the like on the pressure-sensitive adhesive layer side of the sheet base material. It may be formed on the surface opposite to the layer.

  At this time, the base film is selected from a material having high stretchability such as a thermoplastic urethane film or a urethane-modified polyester film, and vacuum plating is also a metal having high stretchability, such as Au, Ag, Sn, Cr, In, Ni, Ti and ITO. By using metal oxides such as AlOx, TiOx and ZrOx, and metal compounds such as ZnS and MgFx, it becomes a metallic glossy sheet or hologram sheet that can be pasted on a three-dimensional curved surface, has excellent pasting workability, and has a beautiful appearance. Can provide a highly decorative adhesive sheet.

  An example of a method for forming a hairline pattern or a hologram pattern on the pressure-sensitive adhesive layer surface of the sheet substrate will be described with reference to FIG. First, the sheet base material layer 8 is formed on the process film 7 by a casting method. Next, an ultraviolet curable resin is applied on the sheet substrate to form the embossed layer 9, and a hologram pattern, a hairline pattern, etc. are transferred within the ultraviolet curing time to form a fine embossed pattern 10. Next, the metal or the like is vacuum-plated on the fine emboss 10 to form the embossed reflective layer 11, and an adhesive layer is formed on the embossed reflective layer. Finally, a pressure-sensitive transfer sheet having a hairline pattern or a hologram pattern is obtained by peeling the process film. In the pressure-sensitive transfer sheet thus obtained, a decorative display layer, a protective clear layer, and an application sheet can be provided on a sheet base as necessary.

  The process film 7 may be any film as long as the sheet base material layer can be easily peeled off. However, when a high-quality metal appearance is required, a material that does not contain a release agent is appropriate.

  The sheet base material layer 8 is preferably formed by a casting method so that the fine embossing minimizes the directionality during stretching. Moreover, in order that fine embossing may eliminate appearance defects such as fish eyes as much as possible, the sheet base material layer is preferably formed by a casting method. The thickness of the sheet base material layer is not particularly limited. The sheet base material layer preferably has no yield point in both MD and CD in the SS curve curve during stretching, and preferably has a breaking elongation of 100% or more. The sheet base material layer can be colored to such an extent that an emboss pattern can be effectively produced, and can be colored as long as the emboss pattern can be effectively produced on the sheet base material layer.

  The embossing layer 9 is suitably an ultraviolet curable resin that is instantly cured and has solvent resistance. When the emboss forming layer is an ultraviolet curable resin, fine emboss is transferred to the surface of the ultraviolet curable resin within the ultraviolet curing time. The thickness of the embossing layer is not particularly limited as long as it can be embossed. The emboss forming layer may be formed on the entire surface of the sheet base material layer, or may be formed on a part. Further, it is preferable that the embossing layer is not subjected to oxygen inhibition during curing. There are no particular restrictions on the stretching characteristics of the embossed layer itself, but it is desirable that no cracks or the like occur when stretching required for application to a three-dimensional curved surface is performed.

The reflective layer 11 is provided so that the unevenness of the fine embossing is not lost by the pressure-sensitive adhesive layer, and may be one that effectively reflects or does not reflect the unevenness pattern of the embossment. As the effective reflection layer, a metal or a metal compound having a reflectance higher than the refractive index of the emboss is used, and a material having such characteristics may be selected from the above-described metals or metal compounds. In addition, ZnS is suitable when an emboss pattern such as a transparent hologram is required. Other _{TiO 2, Al 2 O 3,} ITO, SiO , or the like can also be used.

As described above, various types of decorative display layers can be formed on the sheet base material. In particular, the following can be mentioned when the glittering decorative patterns are summarized.
(1) A glittering decorative pattern to which a metallic glittering foil pressing material such as a gold foil, a silver foil, a hologram film, or a light interference film is attached.
(2) Metallic pattern printed using ink containing metal powder such as aluminum powder.
(3) A glittering decorative pattern formed by vacuum plating a metal such as aluminum or tin on a substrate.
The hologram film is obtained by recording interference fringes generated by causing a signal wave diffracted by a subject and a reference wave to interfere with a photosensitive resin film containing a thermoplastic resin or an ultraviolet curable resin.

  Moreover, as shown in FIG. 1, the protective clear layer 5 may be provided in the surface of the decoration display layer in the adhesive sheet 1 of this invention. For the protective clear layer, a general synthetic resin for printing ink can be used. Specifically, phenol resin, melamine resin, ketone resin, vinyl chloride-vinyl acetate resin, butyral resin, acrylic resin, polyester resin, alkyd resin, polyamide resin, epoxy resin, polyurethane resin, nitrocellulose resin, ethyl cellulose, chlorinated rubber Examples thereof include resins. Particularly preferred is a polyurethane-based two-component curable resin or acrylate monomer, which reacts by mixing a polyisocyanate-based crosslinking agent with a single or mixed resin of polyacryl polyol or polyester polyol having good transparency and excellent solvent resistance. In addition, an ultraviolet curable acrylic resin having an oligomer as a main component can be used.

  The protective clear layer has various additives as desired, for example, an antioxidant, an ultraviolet absorber, a light stabilizer, an antistatic agent, a flame retardant, a dye, and the like, as long as the object of the present invention is not impaired. Colorants such as pigments can be added as appropriate. These additives are the same as those used in the pressure-sensitive adhesive composition or sheet base material.

  Furthermore, after sticking the decorative adhesive sheet of the present invention to the surface of a desired adherend, a transparent or translucent resin so that the entire surface of the stuck thin film marking sheet is covered on the surface of the adherend A protective layer (topcoat clear layer) may be formed. Thereby, an article having excellent durability and a beautiful appearance can be obtained. Examples of the film-forming composition used for the topcoat clear layer include alkyd resins, phenol resins, urea resins, melamine-alkyd resins, acrylic-melamine resins, unsaturated polyester resins, epoxy resins, polyurethane resins, acrylic resins, etc. General synthetic resins for paints can be mentioned.

  A sticking auxiliary member (application sheet) for assisting in the work of sticking a decorative adhesive sheet such as a label or a design sheet to the adherend may be further provided on the protective clear layer.

  The pressure-sensitive adhesive sheets such as labels and design sheets of the present invention can be attached to various adherends to give decorative bodies with functions such as decoration, display, identification, and protection. Affixing to an adherend such as a decorative adhesive sheet or a label can be performed manually or mechanically. When affixing to a three-dimensional curved surface, before adhering the decorative adhesive sheet to the adherend, the decorative adhesive applied manually or by mechanical means such as vacuum forming or pressure forming Molding according to the three-dimensional curved surface of the sheet may be performed and pasted, or it may be pasted while extending the decorative adhesive sheet along the three-dimensional curved surface at the time of pasting. The adhesive sheet, label, design sheet, and the like of the present invention are well adapted to adherends, cloths, and the like having a three-dimensional curved surface or a texture on the surface, and do not easily float.

  The pressure-sensitive adhesive sheets such as labels and design sheets of the present invention are conventionally used, for example, advertising stickers used for signs, advertising towers, shutters, show windows, etc., vehicles such as automobiles and motorcycles, motor boats, etc. Stripe stickers for decoration used on Japanese ships, display stickers used for traffic signs, road signs, information boards, fishing equipment such as fishing rods, decorative stickers for outdoor play equipment such as golf clubs and tennis rackets, buses, etc. It can be used for all purposes such as coating replacement sheets.

  The present invention will be described more specifically with reference to the following examples. However, the present invention is not limited to the following examples.

In the following examples, “10% modulus” is obtained by the following method.
(Measurement of 10% modulus)
A film cut to a width of 10 mm was used as a tensile tester using “Autograph AGS-50D type” (manufactured by Shimadzu Corporation), and the test sample was placed at an ambient temperature of 23 ° C. at a pulling rate of 100 mm between chucks and 200 mm / min. A tensile test was performed to obtain a stress-strain curve, and the stress at 10% elongation of the film was taken as 10% modulus.

Example 1
Glass transition point (Tg) 10 ° C., hydroxyl value 10 KOH mg / g, number average molecular weight 40 × 10 ³ urethane-modified polyester resin (Toyobo, Byron UR-3500) 80 parts by weight, glass transition point (Tg) −22 ° C. 20 parts by weight of a urethane-modified polyester resin having a hydroxyl value of 3 KOHmg / g and a number average molecular weight of 32 × 10 ³ (byron UR-8700, manufactured by Toyobo Co., Ltd.), a polyester plasticizer having a number average molecular weight of 1,000 (manufactured by ADEKA, Adekaizer PN- 150) 10 parts by weight were mixed, and this pressure-sensitive adhesive composition was applied onto a silicone release paper to a dry film thickness of 30 μm and dried at 100 ° C. for 5 minutes. A pressure-sensitive adhesive sheet 1 was obtained by laminating a thermoplastic urethane film having a measured value of 10% modulus of 4 N / 10 mm and a thickness of 20 μm and aging the pressure-sensitive adhesive sheet at room temperature for 1 week. About the pressure-sensitive adhesive sheet 1 thus obtained, the following test methods were used for “adhesive strength after 1 minute and after attachment”, “adhesive strength after heating at 80 ° C. for 30 minutes”, “sticking property”, and “topcoat property”. A test was conducted. The results are shown in Table 1.

<Test method>
1. 1 minute after pasting and adhesive strength over time The sample was cut to a width of 25 mm, and high urethane No. After being bonded to a 5000 white coated plate and subjected to 2 reciprocating pressure bonding with a 2 kg roller, it was left at room temperature (23 ° C.) for 1 minute, 24 hours and 72 hours, and its adhesive strength was measured. For the measurement, “Autograph AGS-50D type” (manufactured by Shimadzu Corporation) was used, and the measurement was performed by an 180 ° Peel method at an ambient temperature of room temperature (23 ° C.) at a pulling rate of 300 mm / min.

2. Adhesive strength after heating at 80 ° C. for 30 minutes. Bonded to a 5000 white coated plate and pressed twice with a 2 kg roller, heated at 80 ° C. for 30 minutes, and then allowed to cool at room temperature (23 ° C.) for 1 hour. Measurements were made.

3. Pasting property A sample was cut to a width of 25 mm, and high urethane No. After repeating the process of strongly pressing and immediately peeling off using a squeegee (sticking spatula) on a 5000 white painted plate, press and apply completely with a squeegee, and observe the presence or absence of surface abnormalities. Evaluation was based on the evaluation criteria.
(Evaluation criteria)
○: Appearance without abnormal appearance ×: Appearance abnormal

4). Topcoat property A sample was cut to a size of 25 mm x 50 mm, and BASF High Urethane No. After pasting on 5000 white painted plate, BASF made high urethane No. An overcoat was applied with a 5000 clear, and baked at 80 ° C. for 30 minutes. The surface was observed for abnormal appearance and evaluated according to the following evaluation criteria.
(Evaluation criteria)
○: Appearance without abnormal appearance ×: Appearance abnormal

Example 2
Urethane-modified polyester resin is only 100 parts by weight of Toyobo UR-8700, 10 parts by weight of polyester plasticizer (Adeka, Adeka Sizer PN-150), 10 parts by weight of melamine resin (Cytex, Cymel 701), acid A pressure-sensitive adhesive composition was prepared by blending 1 part by weight of phosphoric acid as a catalyst. The adhesive sheet 2 was obtained in the same manner as in Example 1. About the pressure-sensitive adhesive sheet 2 obtained in this manner, in the same manner as in Example 1, “adhesive strength after 1 minute and after attachment”, “adhesive strength after heating at 80 ° C. for 30 minutes”, “sticking property”, “top coat property” ”Was conducted. The results are shown in Table 1.

Example 3
The urethane-modified polyester resin is only 100 parts by weight of UR-3500 manufactured by Toyobo, 20 parts by weight of a polyester plasticizer (manufactured by Adeka, Adeka Sizer PN-350) having a number average molecular weight of 2,500, and a polyisocyanate compound (manufactured by Nippon Polyurethane Industry, Coronate HL) 5 parts by weight was blended to prepare a pressure-sensitive adhesive composition. The pressure-sensitive adhesive sheet 3 was obtained in the same manner as in Example 1. The pressure-sensitive adhesive sheet 3 thus obtained was tested for “adhesive strength after 1 minute and after attachment”, “adhesive strength after heating at 80 ° C. for 30 minutes”, “sticking property”, and “topcoat property”. The results are shown in Table 1.

Example 4
A pressure-sensitive adhesive sheet 4 was obtained in the same manner as in Example 3, except that a fine emboss pattern (hologram pattern) was applied to the base film in contact with the pressure-sensitive adhesive layer, and 500 Å of Sn was vacuum-plated thereon. About the pressure-sensitive adhesive sheet 4 obtained in this manner, in the same manner as in Example 1, “Adhesive strength after 1 minute of pasting and with time”, “Adhesive strength after heating at 80 ° C. for 30 minutes”, “Adhesiveness”, “Top coat property” ”Was conducted. The results are shown in Table 1.

Comparative Example 1
For 100 parts by weight of an acrylic copolymer having a weight average molecular weight (Mw) of 280,000 polymerized by solution polymerization with butyl acrylate (BA) / acrylic acid (AA) = 100/10, an isocyanate crosslinking agent (manufactured by Nippon Polyurethane Industry, Coronate HL ) 1.0 part by weight was added to obtain a pressure-sensitive adhesive composition. Using this pressure-sensitive adhesive composition, an adhesive sheet 5 was obtained in the same manner as in Example 1. The pressure-sensitive adhesive sheet 5 thus obtained was subjected to the same procedures as in Example 1 with “Adhesive strength after 1 minute of pasting and with time”, “Adhesive strength after heating at 80 ° C. for 30 minutes”, “Adhesiveness”, “Top coat properties” ”Was conducted. The results are shown in Table 1.

Comparative Example 2
N, N, N ′, N′-Tetra with respect to 100 parts by weight of an acrylic copolymer having a weight average molecular weight (Mw) of 320,000 solution-polymerized with butyl acrylate (BA) / acrylic acid (AA) = 100/2 A pressure-sensitive adhesive composition was prepared by adding 1 part by weight of glycidylmetaxylenediamine. Using this pressure-sensitive adhesive composition, an adhesive sheet 6 was obtained in the same manner as in Example 1. The pressure-sensitive adhesive sheet 6 thus obtained was subjected to the same procedures as in Example 1 “Adhesion strength after 1 minute and after attachment”, “Adhesion strength after heating at 80 ° C. for 30 minutes”, “Adhesiveness”, “Top coat property” ”Was conducted. The results are shown in Table 1.

  From Table 1, it can be seen that the pressure-sensitive adhesive composition of the present invention has an extremely low initial adhesive force, and a pressure-sensitive adhesive sheet having a large final adhesive force can be obtained by room temperature aging or heating. It can also be seen that the pressure-sensitive adhesive sheet using the pressure-sensitive adhesive composition of the present invention is excellent in sticking property, and when the cross-linking agent is used, the top coat property is also excellent.

DESCRIPTION OF SYMBOLS 1 Adhesive sheet 2, 8 Sheet base material 3, 12 Pressure sensitive adhesive layer 4 Decoration display layer 5 Protective clear layer 6 Release material 7 Process film 9 Fine embossing formation layer 10 Embossed pattern 11 Reflective layer

Claims (14)

  It is composed of a urethane-modified polyester resin having a glass transition point of 30 ° C. or lower, a hydroxyl value of 0.1 to 20 KOHmg / g, and a number average molecular weight of 10,000 to 100,000 and a plasticizer compatible with the resin. A pressure-sensitive adhesive composition.   The pressure-sensitive adhesive composition according to claim 1, wherein the plasticizer is a polyester plasticizer.   The pressure-sensitive adhesive composition according to claim 1, wherein a crosslinking agent capable of crosslinking the urethane-modified polyester resin is blended in an amount equal to or less than an equivalent of a hydroxyl value of the urethane-modified polyester resin. .   The pressure-sensitive adhesive composition according to claim 3, wherein the crosslinking agent is a melamine-based multifunctional crosslinking agent or an isocyanate-based multifunctional crosslinking agent.   A pressure-sensitive adhesive sheet provided with a pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition according to claim 1 on one surface of a sheet substrate.   6. The pressure-sensitive adhesive sheet according to claim 5, wherein a decorative display layer is provided on a surface opposite to the surface of the sheet substrate on which the pressure-sensitive adhesive layer is provided.   The pressure-sensitive adhesive sheet according to claim 6, wherein a protective clear layer is provided on the decorative display layer.   The pressure-sensitive adhesive sheet according to claim 7, wherein a sticking auxiliary member (application sheet) that assists in the work of sticking the pressure-sensitive adhesive sheet to the adherend is further laminated on the protective clear layer.   The pressure-sensitive adhesive sheet according to any one of claims 5 to 8, wherein a release material is provided on the surface of the pressure-sensitive adhesive layer.   The pressure-sensitive adhesive sheet according to any one of claims 5 to 9, wherein a metal thin film layer is provided on a surface of the sheet base material in contact with the pressure-sensitive adhesive layer.   After forming a fine emboss on the surface of the sheet base material that contacts the pressure-sensitive adhesive layer, a metal thin film layer or a layer formed by forming a metal oxide, metal sulfide, or metal fluoride into a thin film is provided. The pressure-sensitive adhesive sheet according to any one of claims 5 to 9,   The pressure-sensitive adhesive sheet according to claim 5, wherein the pressure-sensitive adhesive sheet is a pressure-sensitive adhesive sheet for display / design, or a pressure-sensitive adhesive label for decoration / display, a sticker, or a stripe.   A decorative body comprising the pressure-sensitive adhesive sheet for display / design according to claim 12, a pressure-sensitive adhesive label for decoration / display, a sticker, or a stripe.   The decorative body according to claim 13, further comprising an overcoat made of a transparent resin after a label or a design sheet is attached.

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