JP2000135871A - Method for thermal transfer printing and label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve developability without needing release sheet by printing a print layer of a thermal transfer printing sticky tape by using a hot melt type ink ribbon obtained by providing a thermal transfer ink layer containing a polyethylene wax on one surface of a base material film. SOLUTION: A print layer of a winding type sticky tape is printed by using a hot melt type ink ribbon in a thermal transfer type. In the ribbon used in this case, a thermal transfer ink layer containing a polyethylene wax is provided on one surface of a base material film such as a polyester film or the like having a thickness of about 1 to 10 μm, a heat resistance lubricated as needed, and used. The ink layer is constituted of wax and the like, resin and the line, a coloring agent and the like. Thus, in the case of printing on the tape, transfer and adhesive properties to the print layer are improved. Good printing is performed. Developability can be improved without needing a release sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer printing method for an adhesive tape for thermal transfer printing and a label printed by the method. More specifically, the present invention provides
Good printing by the thermal transfer method is possible, on a pressure-sensitive adhesive tape that does not have a suitable release paper as a label, etc., using a hot-melt ink ribbon, a method of effectively printing by a thermal transfer method, and the above-mentioned adhesive tape, The present invention relates to a label printed by a method.

[0002]

2. Description of the Related Art Conventionally, a label printed by a thermal transfer method can be printed on the surface of a base material and has a pressure-sensitive adhesive layer on the back surface thereof. And, in general, when the label tape is wound into a roll,
In order to prevent the adhesive from migrating to the adjacent print layer and to reduce the printability thereof, and to facilitate the development of the tape, a release paper is laminated on the adhesive layer, and in that state, a roll is rolled. It is wound in a shape. However, such a label provided with a release paper requires a work of peeling the release paper at the time of sticking the label, and there is a problem that the handleability during use is poor. Further, from the viewpoint of environmental protection and resource saving, a label without release paper is required. On the other hand, as a pressure-sensitive adhesive tape, a single-layer rolled pressure-sensitive adhesive tape having no release paper is known. In this roll-shaped pressure-sensitive adhesive tape, the back surface of the pressure-sensitive adhesive layer is subjected to a release treatment in order to improve the releasability between the pressure-sensitive adhesive layer and the back surface of the tape. Therefore, in order to use this adhesive tape as a label for printing by a general-purpose thermal transfer type ink ribbon by a thermal transfer method, since the release treatment is performed with a silicone resin or the like, the transferability of the ink and Poor adhesion cannot provide good printability. If the above-mentioned peeling treatment is omitted in order to improve the printability, there arises a problem that the peelability from the pressure-sensitive adhesive layer is inferior, the roll-shaped tape becomes poor in spreadability, and it is difficult to use a general-purpose thermal transfer printer.

[0003]

Under such circumstances, the present invention enables good printing by a thermal transfer method, is suitable as a label, etc., has no release paper, and has good developability. It is an object of the present invention to provide a method for effectively printing on a heat-sensitive transfer printing adhesive tape by a heat-sensitive transfer method, and to provide a label formed by applying the method to the above-mentioned pressure-sensitive adhesive tape and performing effective printing. .

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above-mentioned object, and as a result, have found that a printed layer containing a specific resin containing a specific resin and exhibiting releasability and printability is formed on one surface of a substrate. Along with having a pressure-sensitive adhesive layer on the opposite side of the take-up type adhesive tape, by using a hot-melt ink ribbon having an ink layer containing a specific wax, by a thermal transfer method to the print layer of the adhesive tape. It has been found that printing can be performed effectively. The present invention has been completed based on such findings. That is, the present invention provides (1) a printing layer of a heat-sensitive transfer type printing pressure-sensitive adhesive tape having a printing layer containing a polyolefin resin on one side and a pressure-sensitive adhesive layer on the other side; A thermal transfer printing method characterized in that printing is performed using a hot-melt ink ribbon having a thermal transfer ink layer containing a polyethylene wax on the surface of (2), (2) the polyolefin resin in the print layer is a polyethylene resin The thermal transfer printing method according to the above (1), which is a mixture of a polyethylene resin containing 30% by weight or more of a polyethylene resin and a polyolefin elastomer, or (3) the density of the polyethylene wax in the thermal transfer ink layer is 0 .94g / cc (25 ° C)
The thermal transfer printing method according to the above (1) or (2), wherein the polyethylene wax in the thermal transfer ink layer has a molecular weight of 2,000 to 4,000.
Wherein the hardness of the polyethylene-based wax in the thermal transfer ink layer is 5 dmm (25).
C) or less, and the thermal transfer printing method according to any one of the above (1) to (4), and (6) an adhesive produced by the method according to any one of the above (1) to (5). Provide a label.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The heat-sensitive transfer type pressure-sensitive adhesive tape for use in the present invention has only to have a printing layer containing a polyolefin resin on one side, and a base material coated or bonded with a polyolefin-based resin. And a polyolefin-based resin film are used. The substrate is not particularly limited, and any one can be selected from those conventionally used for display labels and the like. As such a base material, for example, high-quality paper or kraft paper coated with high-quality paper or clay binder as a filler, high-quality paper or kraft paper coated with polyvinyl alcohol, starch, carboxymethyl cellulose, or a resin is impregnated. Paper, such as impregnated paper, or a plastic film made of polyester, polycarbonate, ABS resin, or the like. The thickness of the substrate is not particularly limited and may be appropriately selected depending on various circumstances, but is usually in the range of 1 to 300 μm, preferably 10 to 200 μm. When a plastic film is used as the base material, on one or both surfaces thereof, for the purpose of improving the adhesiveness with a layer provided thereon, if desired,
Irradiation treatment such as sandblasting or solvent treatment or corona discharge treatment, ozone / ultraviolet irradiation treatment, flame treatment, chromic acid treatment, hot air treatment, and other oxidation treatments can be performed.

In the pressure-sensitive adhesive tape of the present invention, a print layer is formed on one surface of the base material, and the print surface must contain a polyolefin resin.
Examples of the polyolefin resin include a polyethylene resin and a polypropylene resin. In particular, a polyethylene resin alone or a mixture of a polyethylene resin and a polyolefin elastomer is preferably used. Here, examples of the polyethylene resin include low-density polyethylene, medium-density polyethylene, and high-density polyethylene. Of these, low-density polyethylene is preferable because of its excellent workability. The polyethylene resin may be used alone or in combination of two or more. On the other hand, as the polyolefin-based elastomer, a copolymer of ethylene and an α-olefin having 3 or more carbon atoms is preferable. As the copolymer, for example, ethylene and propylene, 1-butene, 1-pentene, 3-
Methyl-1-butene, 1-hexene, 3-methyl-1-
A copolymer with at least one α-olefin having 3 or more carbon atoms selected from pentene, 4-methyl-1-pentene and the like can be mentioned. These copolymers may be used alone or in combination of two or more. Among them, particularly, ethylene-1-butene random copolymer, ethylene-propylene random copolymer and these The mixture is suitable from the viewpoint of the releasability from the pressure-sensitive adhesive layer described below.

When a mixed resin of a polyethylene resin and the above-mentioned polyolefin elastomer is used, the polyethylene resin is contained in the mixed resin in view of the releasability from the pressure-sensitive adhesive layer and the printability in a thermal transfer method. The amount is preferably at least 30% by weight, particularly preferably at least 50% by weight. The method for forming the printing layer on one side of the substrate is not particularly limited, and a conventionally known coating method, for example, an extrusion method in which a melt is extruded from a slit nozzle and applied, or a liquid or a melt is applied via a roll Any method such as a roll coating method can be used. The thickness of the printing layer formed in this manner is not particularly limited, but it has appropriate flexibility as a label, and the printing layer is smooth, so that good printing properties can be obtained by the thermal transfer method. Therefore, the range of 1 to 100 μm is preferable, and the range of 10 to 60 μm is particularly preferable.

As the heat-sensitive transfer type adhesive tape for printing in the present invention, a film made of a polyolefin resin can be used. Examples of the polyolefin-based resin include the above-mentioned polyolefin resins, and in particular, a polyethylene-based resin and a mixture of a polyethylene-based resin and a polyolefin-based elastomer are preferable. In this case, the polyolefin-based resin film may be a single layer or a multilayer, and the thickness thereof is preferably in the range of 20 to 200 μm in consideration of suitability as a label, and particularly preferably 50 to 200 μm.
A range of 100 μm is more preferable. In the pressure-sensitive adhesive tape of the present invention, a pressure-sensitive adhesive layer is provided on the other side of the printing layer provided on one side of the substrate. The pressure-sensitive adhesive used in the pressure-sensitive adhesive layer is not particularly limited, and includes conventionally known pressure-sensitive adhesives, such as rubber-based, acrylic, polyurethane-based, polyester-based, and silicone-based pressure-sensitive adhesives. Acrylic, polyurethane and polyester adhesives having high adhesive strength and good releasability from the printing layer are preferred. These adhesives may be used alone,
Two or more kinds may be used in combination.

As the rubber-based pressure-sensitive adhesive, for example, natural rubber or styrene-butadiene rubber (S
BR), polyisobutylene, butyl rubber, styrene-isoprene block copolymer, styrene-ethylene-butylene block copolymer, and other synthetic rubbers, and if necessary, tackifiers, antioxidants, ultraviolet absorbers,
Those containing a light stabilizer, a softener, a crosslinking agent, a filler, and the like are used. Here, as the tackifier, for example, rosin resin, terpene phenol resin, petroleum resin,
Coumarone-based resins and the like are used, and as an antioxidant, for example, phenol-based, amine-based, benzimidazole-based and the like are used. As an acrylic pressure-sensitive adhesive, as a main component, a main monomer component for imparting tackiness, a comonomer component for imparting tackiness and cohesion, and a functional group-containing monomer component for crosslinking and improving tackiness are copolymerized. Containing the acrylic resin obtained by
What contains a tackifier etc. is used.

Here, the main monomer components constituting the acrylic resin include, for example, alkyl acrylates such as butyl acrylate, amyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, cyclohexyl acrylate, and benzyl acrylate. Examples include esters, alkyl methacrylates such as butyl methacrylate, 2-ethylhexyl methacrylate, cyclohexyl methacrylate, and benzyl methacrylate. Examples of the comonomer component include lower alkyl esters of acrylic acid and methacrylic acid such as methyl acrylate, methyl methacrylate, and ethyl methacrylate, vinyl acetate, styrene, and acrylonitrile. Examples of the functional group-containing monomer component include: For example, carboxyl group-containing monomers such as acrylic acid, methacrylic acid, maleic acid, itaconic acid and crotonic acid, 2-hydroxyethyl (meth)
Examples include hydroxyl group-containing monomers such as acrylate, 2-hydroxypropyl (meth) acrylate, and N-methylol acrylamide, and further include acrylamide, methacrylamide, and glycidyl methacrylate. Further, examples of the crosslinking agent include compounds capable of reacting with a functional group such as isocyanate-based, epoxy-based, ethyleneimine-based, and aluminum chelate-based. Examples of the tackifier include those described in the description of the rubber-based pressure-sensitive adhesive. The same ones can be mentioned.

The polyurethane-based resin contains, as a main component, a resin composed of a long-chain polyol, a polyisocyanate compound and a chain extender. If necessary, a filler, an aromatic ester or chlorinated paraffin is used. Those containing a plasticizer, such as, an ultraviolet absorber, an antioxidant, and a coloring agent are used. Here, examples of the long-chain polyol include polyester polyols and polyether polyols, examples of the polyisocyanate compounds include tolylene diisocyanate and hexamethylene diisocyanate, and examples of the chain extenders include low-molecular-weight polyhydric alcohols and the like. And aromatic diamines. This polyurethane-based pressure-sensitive adhesive contains other resins such as poly (meth) acrylic acid resin, polyester resin, polyamide resin, ethylene-acrylic copolymer resin, ethylene-vinyl acetate copolymer resin, and the like. Is also good. In addition, this polyurethane-based resin is a one-pack type thermoplastic polyurethane elastomer obtained by reacting a long-chain diol, a polyisocyanate compound, and a chain extender into a polymer, and diluted with an organic solvent. There is a two-pack type in which a crosslinking agent is added. Further, there are a moisture curing type in which a polyisocyanate compound is reacted with moisture in the air and a hot melt type of a hot melt extrusion type.

As the polyester-based pressure-sensitive adhesive, an aromatic dicarboxylic acid component such as terephthalic acid, isophthalic acid, methyl terephthalic acid and naphthalenedicarboxylic acid, and ethylene glycol, diethylene glycol,
Those containing a polyester resin obtained by copolymerizing a glycol component such as neopentyl glycol and a solvent, a cross-linking agent, and if necessary, a tackifier are used. Here, examples of the crosslinking agent include isocyanate-based, epoxy-based, ethyleneimine-based, and aluminum chelate-based agents, and examples of the tackifier include the same ones as described in the description of the rubber-based adhesive. be able to. The silicone pressure-sensitive adhesive contains, for example, polysiloxane or polyphenylsiloxane as a main component, and further includes a tackifier, if desired.
Those containing a plasticizer, a filler and the like can be mentioned.

In the pressure-sensitive adhesive tape of the present invention, it is preferable that the pressure-sensitive adhesive is applied in a dry weight range of 5 to 50 g / m ² to provide a pressure-sensitive adhesive layer. In particular, in the case of forming a small roll, it is advantageous to apply the adhesive in the range of 10 to 30 g / m ² from the viewpoint of reducing the protrusion of the pressure-sensitive adhesive layer. Among the above-mentioned various pressure-sensitive adhesives, a pressure-sensitive adhesive layer using a polyurethane-based pressure-sensitive adhesive and a polyester-based pressure-sensitive adhesive is preferable because of good releasability from the print layer on the back surface of the tape. However, when the pressure-sensitive adhesive layer is provided with a polyurethane-based pressure-sensitive adhesive or a polyester-based pressure-sensitive adhesive alone, the adhesive strength may be poor when used as a label or the like depending on the type of the adherend. Therefore, in such a case, it is advantageous to provide a pressure-sensitive adhesive layer by using a polyurethane-based pressure-sensitive adhesive or a polyester-based pressure-sensitive adhesive and a rubber-based pressure-sensitive adhesive or an acrylic pressure-sensitive adhesive in an appropriate ratio.

Next, the thermal transfer printing method of the present invention will be described. In the printing method of the present invention, printing is performed on the print layer of the take-up adhesive tape by a thermal transfer method using a hot-melt ink ribbon. At this time, the hot-melt type ink ribbon to be used is usually provided with a thermal transfer ink layer containing a polyethylene-based wax on one side (one side) of a base film such as a polyester film having a thickness of about 1 to 10 μm. The other side is subjected to a heat-resistant lubricating treatment according to the above. The thermal transfer ink layer is generally composed of waxes, resins, colorants, and the like. In the present invention, polyethylene wax is used as the wax. Thereby, when printing on the adhesive tape, excellent transferability and adhesiveness to the print layer are achieved, and good printing is possible. Examples of the base film constituting the hot-melt type ink ribbon include the above polyester films, for example, polyethylene terephthalate film, polyethylene naphthalate film, polyarylate film, and the like. In addition, polycarbonate film, polyamide film, aramid film,
Other various kinds of plastic films generally used as a substrate film for this type of ink ribbon can be used. Alternatively, high-density thin paper such as condenser paper may be used. The thickness of the base film is about 1 to 10 μm from the viewpoint of improving the heat conduction,
About 7 μm is preferable.

The waxes constituting the thermal transfer ink layer provided on one side of the substrate film include:
As described above, it is essential to use a polyethylene wax (such as polyethylene wax or oxidized polyethylene wax). The polyethylene wax is a synthetic wax, generally a hydrocarbon resin having a molecular weight of 500 to 10,000, and is a natural wax. It has a higher melting point than wax (80-150 ° C) and is excellent in wear resistance and heat resistance.
Among them, the polyethylene wax suitably used in the present invention has a density of 0.94 g / cc (25%).
℃) or more, the molecular weight is in the range of 2000 to 4000,
And those whose hardness satisfies at least one condition of 5 dmm (25 ° C.) or less. In addition,
In the present invention, natural waxes such as wood wax, beeswax, carnauba wax, candelilla wax, montan wax, and ceresin wax; petroleum waxes such as paraffin wax and microcrystalline wax; Synthetic waxes such as oxidized wax, ester wax, Fischer-Tropsch wax, α-olefin-maleic anhydride copolymerized wax; higher fatty acids such as myristic acid, palmitic acid, stearic acid, and behenic acid; higher aliphatic acids such as stearyl alcohol and docosanol Alcohols; esters such as higher fatty acid monoglyceride, fatty acid ester of sucrose, fatty acid ester of sorbitan; amides such as stearamide and oleylamide; and bisamides. It can also be used.

Further, as a resin constituting the thermal transfer ink layer, a heat-fusible resin is used, and specifically, an olefin-based copolymer such as an ethylene-vinyl acetate copolymer or an ethylene-acrylate copolymer is used. Coalescing, polyamide resin, polyester resin, epoxy resin, polyurethane resin, acrylic resin, vinyl chloride resin, cellulose resin, vinyl alcohol resin, petroleum resin,
Examples include phenolic resins, styrene resins, vinyl acetate resins, and elastomers such as natural rubber, styrene-butadiene rubber, isoprene rubber, chloroprene rubber, and polyisobutylene and polybutene. In addition, as a colorant constituting the thermal transfer ink layer, when used as a single-color thermal transfer ink ribbon, one that has been conventionally used for this type of thermal transfer ink ribbon, such as carbon black, has a covering power. Large organic and inorganic coloring pigments and dyes are listed. On the other hand, when a color image is formed by overlapping transfer of yellow ink, magenta ink, and cyan ink, yellow, magenta, and cyan colorants are used for the yellow, magenta, and cyan ink layers, respectively. The thermal transfer ink layer may further contain a dispersant, an antistatic agent, an extender and an additive, if desired. This thermal transfer ink layer is formed by appropriately using the above-mentioned components, but each component should preferably be selected such that the melting point or softening point of the ink layer is about 80 to 130 ° C. The thickness of the ink layer is not particularly limited, but is usually 0.1 to 5.
The range is 0 g / m ² .

The hot-melt ink ribbon according to the present invention comprises:
The heat transfer ink layer provided on one surface of the base film and subjected to a heat-resistant lubrication treatment on the opposite surface is used. This heat-resistance lubrication treatment can be performed by various methods. For example, when a plastic film as described above is used as the base film, a silicone resin,
By a method of forming a heat-resistant lubricating layer using a fluororesin, a nitrocellulose resin, or various heat-resistant resins modified with these, such as silicone-modified urethane resin, or a mixture of these heat-resistant resins with a lubricant. be able to. Such an ink ribbon can be manufactured by a usual method conventionally used. For example, a wax or resin such as a polyethylene wax as a vehicle is melted or dissolved in a solvent, a colorant is mixed with the melt, and a dispersant or an additive is further added as required, and the dispersion is performed by a roll mill or a bead mill. The ink is prepared by sufficiently dispersing and mixing with a machine. Thereafter, the ink is applied to one surface of a base film by a roll coater or the like, and the other surface is subjected to a heat-resistant lubricating treatment. After cooling or drying the solvent, winding is performed to form a main winding. Subsequently, the original winding is cut into a predetermined ribbon width by a slitting machine and wound on a core, whereby a target ink ribbon is manufactured.

As a thermal transfer printer used for printing, an adhesive tape without release paper is used. To obtain good transportability, a member in contact with the adhesive layer inside the apparatus is subjected to a release treatment. It is preferable to use those that have been used. In addition, even with conventional thermal transfer printers, the members in contact with the adhesive layer are changed to embossed or peeled silicone rubber rolls, etc., and the cutter that cuts the adhesive tape is coated with a release agent to use it. Becomes possible. The present invention also provides a label printed by a thermal transfer method using a hot-melt ink ribbon having an ink layer containing a polyethylene resin as a print layer of the pressure-sensitive adhesive tape of the present invention. Things. Since the label of the present invention is not provided with a release paper, it does not require an operation of peeling the release paper when attaching the label to the adherend, and is preferable from the viewpoint of environmental protection and resource saving. .

[0019]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. Example 1 A low-density polyethylene resin [Mitsui Chemicals Co., Ltd.] was applied to one surface of a base material made of high-quality paper having a basis weight of 80 g / m ² and a thickness of 75 μm.
Manufactured by Yukaron LK-30] was laminated to a thickness of 30 μm by an extrusion lamination method (melting temperature: 300 ° C.) to form a print layer. Next, an acrylic adhesive [Toyo Ink Mfg. Co., Ltd.,
BPS4429-4] was applied using a comma coater and dried to form an adhesive layer having a thickness of 25 g / m ² , thereby producing an adhesive tape. Next, this pressure-sensitive adhesive tape was processed into a small roll having a width of 100 mm by a cutting machine to obtain a heat-sensitive transfer type roll-up pressure-sensitive adhesive tape for printing.

Next, as an ink ribbon, 30 parts by weight of carbon black, 10 parts by weight of ethylene-vinyl acetate copolymer and polyethylene wax [density 0.97 g] were used in the ink layer.
/ Cc (ASTM D792), molecular weight 4000 (viscosity method), hardness 1 dmm (JISK2530 penetration)] 5
Printing on the printing layer of the pressure-sensitive adhesive tape using a polyethylene wax ribbon made of 4 parts by weight of ink, and using a printing machine manufactured by DATAMAX Co., Ltd., which can thermally transfer and print labels without using release paper, as a printing printer. Then, transferability, adhesion (tape peeling resistance) and abrasion resistance were evaluated in the following manner. (1) Transferability Solid printing was performed by a thermal transfer method, and the optical density of the portion was measured. (2) Adhesion (tape peeling resistance) After the adhesive surface of the adhesive tape was adhered to the bar code portion, it was peeled off at a stretch and the degree of adhesion of the bar code portion to the print layer was observed. ：: extremely good (the bar code portion did not migrate to the adhesive surface at all) ○: good (the bar code portion migrated to the adhesive surface, but the bar code was legible) ×: defective (bar) (3) Abrasion resistance The bar code portion was 300 g / cm with a Gakushin type abrasion tester.
A load of ² was applied, and 500 reciprocations were rubbed with a cotton cloth, and the change was subjected to ANSI grade using a bar code verifier. For the scratch resistance, scan the barcode symbol 10 times with a verifier,
The quality was comprehensively evaluated from the reflectance of the bar space, voids and spots, and the dimensional accuracy of the element by the evaluation method defined by the American National Standards Institute (ANSI). This ANSI grade has five stages of A, B, C, D, and F, where A has the highest quality and F cannot read barcodes (ANSI X3.182). Table 1 shows the results.

<Peeling force from pressure-sensitive adhesive layer>
The tape was peeled off from the roll at a peeling speed of 300 mm / min, and the strength at that time was measured to obtain a developing force (peeling force) for peeling off the tape from the roll. <Tape development> The state of tape development when printing was actually performed by a thermal transfer printer was observed. <Adhesive Strength of Pressure-Sensitive Adhesive Layer> Adhesive strength was measured in accordance with JIS Z0237 with respect to a cold-rolled stainless steel sheet. Table 1 shows the results.

Example 2 In Example 1, the weight ratio of the low-density polyethylene to an ethylene-α-olefin copolymer [P-0280, manufactured by Mitsui Chemicals, Inc.] was changed to 50 in place of the low-density polyethylene resin alone. : 50, and the same procedure as in Example 1 was carried out except that a printing layer was formed using a mixed resin. The results are shown in Table 1. Example 3 In Example 1, a 30:70 weight ratio of the low-density polyethylene and an ethylene-α-olefin copolymer [P-0280, manufactured by Mitsui Chemicals, Inc.] was used instead of the low-density polyethylene resin alone. The procedure was performed in the same manner as in Example 1 except that a printing layer was formed using a mixed resin. The results are shown in Table 1. Example 4 In Example 2, instead of the acrylic pressure-sensitive adhesive, an acrylic pressure-sensitive adhesive [BPS442, manufactured by Toyo Ink Mfg. Co., Ltd.]
9-4] and a polyurethane-based adhesive [Crisbon 5150S, manufactured by Dainippon Ink and Chemicals, Inc .;
4 parts by weight of Chrisbon MX as a crosslinking agent and Chrisbon AccelH as a promoter per part by weight
M3 was used in the same manner as in Example 2 except that an adhesive layer was formed using a mixture having a weight ratio of 80:20. Table 1 shows the results.

Example 5 In Example 2, an acrylic pressure-sensitive adhesive [BPS442, manufactured by Toyo Ink Mfg. Co., Ltd.] was used instead of the acrylic pressure-sensitive adhesive.
9-4] and a polyester-based adhesive [Nippon Synthetic Chemical Co., Ltd.]
And XUS0020] was used in the same manner as in Example 2 except that an adhesive layer was formed using a mixture having a weight ratio of 80:20. The results are shown in Table 1. Comparative Example 1 In Example 1, a silicone-based release agent [SPX357, manufactured by Dow Corning Toray Silicone Co., Ltd.] was used instead of the printing layer made of a low-density polyethylene resin as a catalyst per 100 parts by weight of the solid content. Made, SRX21
2 was added using a gravure coater, and then heat-treated at 130 ° C. for 1 minute to cure the silicone, thereby forming a 1.2 g / m ² print layer. Was carried out in the same manner as in Example 1. The results are shown in Table 1. Comparative Example 2 In Example 1, a non-silicone long-chain alkyl-based release agent (manufactured by Yasuhara Chemical Co., Ltd., FIG-70) was applied using a gravure coater instead of the printing layer made of a low-density polyethylene resin. 6g / m after drying
^The procedure was performed in the same manner as in Example 1 except that the printing layer of No. ² was formed. The results are shown in Table 1.

[0024]

[Table 1]

[0025]

[Table 2]

From Table 1, it can be seen that Examples 1 to 5 have good transferability and adhesion in printing by thermal transfer and also have excellent tape spreadability. On the other hand, in Comparative Example 1, since the release treatment was performed with a silicone-based release agent, the releasability from the pressure-sensitive adhesive layer was good.
Poor thermal transfer printability. Comparative Example 2 has good transferability in thermal transfer printing and good adhesion to some extent, but has poor peelability from the pressure-sensitive adhesive layer, poor tape spreadability, and is not practical. Examples 6 to 13 Examples 1 to 13 were carried out in the same manner as in Example 1, except that a polyethylene wax ribbon using a polyethylene wax shown in Table 2 was used for the ink layer. Table 2 shows the evaluation results of the transferability, adhesion (tape peeling resistance), and abrasion resistance. From this table, it can be seen that the transferability and adhesion are good, and the scratch resistance is also good to some extent.

Comparative Example 3 In Example 1, except that an ester wax ribbon in which an ester wax was used in place of the polyethylene wax in the ink layer was used as the ink ribbon,
It carried out similarly to Example 1. Table 2 shows the evaluation results of the transferability, adhesion (tape peeling resistance), and abrasion resistance.
From this table, it can be seen that the transferability is poor, the adhesion is poor, and the abrasion resistance is not practical after reading the bar code, making it impractical.

Comparative Example 4 Example 1 was carried out in the same manner as in Example 1 except that an acrylic ribbon using an acrylic resin instead of polyethylene wax was used for the ink layer. Transferability, adhesion (tape peeling resistance)
Table 2 shows the evaluation results of the scratch resistance. From this table, it can be seen that the transferability is poor, the adhesion is poor, and the abrasion resistance is not practical after reading the bar code, making it impractical.

[0029]

[Table 3]

[0030]

[Table 4]

[0031]

[Table 5]

[0032]

[Table 6]

[0033]

According to the printing method of the present invention, by using a hot-melt ink ribbon using a polyethylene resin for the ink layer, it is possible to print on the printing layer of the adhesive tape with good transferability and adhesion. it can. In addition, despite the fact that no release paper is stuck to the adhesive tape, a print tape having excellent spreadability from the roll (peelability with the adhesive layer) and extremely good printing on the printing surface can be obtained. ,
This is suitably used as an adhesive label or the like. In addition, since the thermal transfer printer does not require a mechanism for peeling off the release paper, the size of the apparatus can be reduced, and it becomes easy to issue variable information on site. In addition, when the adhesive tape printed by the printing method of the present invention is used as an adhesive label, since the operation of peeling off the release paper is not necessary, the workability can be improved, and since no release paper is used,
It is also advantageous from the viewpoint of environmental protection and resource saving.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09F 3/02 B41M 5/26 L (72) Inventor Tetsuyuki Utagawa 5207 Shiba, Kawaguchi-shi, Saitama (72) Inventor Masao Matsumoto 4-843 Utajima, Nishiyodogawa-ku, Osaka-shi, Osaka Fujikopian Co., Ltd. Technology Center (72) Inventor Ryoichi Shimazaki 4-83, Utajima, Nishiyodogawa-ku, Osaka City, Osaka F-term in Fujikopian Co., Ltd. Technical Center (Ref.) FA01

Claims (6)

[Claims] 1. A heat-sensitive transfer type pressure-sensitive adhesive tape having a printing layer containing a polyolefin resin on one side and a pressure-sensitive adhesive layer on the other side, and a polyethylene film on one side of a base film. A thermal transfer printing method, wherein printing is performed using a hot-melt ink ribbon provided with a thermal transfer ink layer containing a system wax. 2. The thermal transfer printing method according to claim 1, wherein the polyolefin resin in the printing layer is a polyethylene resin alone or a mixture of a polyethylene resin containing at least 30% by weight of the polyethylene resin and a polyolefin elastomer. . 3. The thermal transfer printing method according to claim 1, wherein the density of the polyethylene wax in the thermal transfer ink layer is 0.94 g / cc (25 ° C.) or higher. 4. The sensitive transfer printing method according to claim 1, wherein the molecular weight of the polyethylene wax in the thermal transfer ink layer is in the range of 2,000 to 4,000. 5. The thermal transfer printing method according to claim 1, wherein the hardness of the polyethylene wax in the thermal transfer ink layer is 5 dmm (25 ° C.) or less. 6. An adhesive label produced by the method according to claim 1.