JPH02153387A - Label and production thereof - Google Patents

Abstract

PURPOSE:To obtain excellent scratching resistance by providing an impression part formed of a thermosensitive transfer recording medium and an adhesive part on the same plane side of a transparent base. CONSTITUTION:The impression part 2 formed of the thermosensitive transfer recording medium and the adhesive part 3 are provided on one surface of the transparent base 1. Polyethylene terephthalate, etc., are used for the base 1. A heat softening color material layer is usable for the thermosensitive sensitive recording medium. Inorg. pigments, org. pigments, dyes, etc., are used for the color material and the content thereof is 5 to 40wt.%, more preferably 10 to 30wt.%. While the hot meltable material is not particularly limited, wax having 50 to 100 deg.C m. p. is more preferable. The content of the material in the heat softening color material layer is 5 to 40wt.%, more preferably 10 to 30wt.%. The heat softening color material layer can be applied and provided on the base 1 by a hot melt coating method, aq. coating method, coating method using an org. solvent, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a label and a method for producing the same, and more specifically, it is suitable for use in the field of, for example, labels affixed to packaging or other objects. This invention relates to a label with excellent scratch resistance and a manufacturing method thereof.

[Prior art and problems to be solved by the invention] In recent years, labels have come to be widely used in various fields.

In addition, labels have traditionally been treated as having the following functions: 1) displaying functions, 1) displaying functions, 1) displaying functions, and 3) displaying functions, etc., but in recent years, in addition to these functions, labels have been It has come to be used with an information function, like a code label.

By the way, because of the way in which labels are used, they are often rubbed and rubbed, which has the disadvantage that the printed image on the label becomes unclear.

Therefore, in order to make the printed image on the label scratch-resistant, techniques such as using special paper containing a thermosetting polymer as the transfer medium or using ink using a diazo type coloring agent are being developed. It has been considered.

However, since the transfer medium, ink, etc. have poor stability, labels made using them cannot be said to be fully satisfactory in terms of storage stability, and also in terms of scratch resistance. It was still far from sufficient.

This invention has been made based on the above circumstances.

That is, an object of the present invention is to provide a label that has excellent scratch resistance even when a conventional transfer medium is used for image formation, and a method for manufacturing the same.

[Means for Solving the Problems] The invention according to claim 1 for solving the problems described above provides an image forming part and an adhesive part formed by a thermal transfer recording medium on the same plane side of a transparent support. A label characterized by:

The invention according to claim 2 is the label according to claim 1, wherein the imprint portion has a mirror image position n relationship with the shape of the desired imprint image.

The invention according to claim 3 is characterized in that, after forming an image portion on a transparent support using a thermal transfer recording medium, an adhesive portion is formed on the same plane side on which the image portion was formed. A method for manufacturing a label according to claim 1.

The invention according to claim 4 is the method according to claim 1, wherein after forming the adhesive part on the transparent support, an image part is formed on the same plane side on which the adhesive part is formed using a thermal transfer recording medium. This is a method for manufacturing labels.

The invention according to claim 5 is characterized in that, after forming an image portion on a transparent support using a thermal transfer recording medium, an adhesive portion is formed on the same plane side on which the image portion was formed. 3. The method for manufacturing a label according to claim 2.

The invention described in claim 6 is the method according to claim 2, wherein after forming the adhesive part on the transparent support, an image part is formed on the same plane side on which the adhesive part is formed using a thermal transfer recording medium. This is a method for manufacturing labels.

Hereinafter, the label of the present invention and its manufacturing method will be explained in detail.

The label of the present invention is characterized in that the label has an image part formed of a thermal transfer recording medium and an adhesive part on the same plane side of a transparent support.

The transparent support is not particularly limited as long as it does not impede the purpose of the present invention, but it is possible to form an image area formed by a thermal transfer recording medium, which will be described later, and an adhesive area, which will be described later. It is preferable to use transparent paper such as resin film, cellophane, paraffin-processed paper, and parchment paper.

Note that among these, resin films are preferred in consideration of usage as a label, mechanical strength, and the like.

Specific examples of the resin film include polyethylene terephthalate, polyethylene, polystyrene,
Examples include resin films of polypropylene, polyimide, polycarbonate, vinyl chloride, vinylidene chloride, cellophane, and the like.

Among these, preferred is polyethylene terephthalate film.

Although the thickness of the transparent support cannot be determined unconditionally depending on the use of the label, it is usually 3 to 500 JLm.

Note that the transparent support referred to in this invention does not need to be completely transparent, and may be a translucent support or a light-transparent colored support.

The term "coplanar side of the transparent support" means to exclude a label having an image part and an adhesive part separately on one side and the other side of the transparent support. do.

That is, as a label of this invention, for example, the third
As shown in the figure, a transparent support 1 has an image part 2 on one side, and a portion of the transparent support 1 other than the image part 2 on the surface having the image part 2 is Imprint part 2 and adhesive part 3
As shown in FIG.
As shown in FIG. Examples include a label in which an adhesive part 3 is formed overlapping an image part 2 formed on a transparent support l.

Among these, as shown in FIGS. 2 and 3, it is preferable to have an image part 2 on one side of the transparent support 1, and of the surface having the image part 2, the above-mentioned This is a label in which an adhesive part 3 is formed in addition to the printing part 2.

The heat-sensitive transfer recording medium for forming the image portion 2 of the present invention is not particularly limited, and suitable is, for example, a known heat-sensitive transfer recording medium in which a heat-softening coloring material layer is provided on a support. It can be used for.

Specific examples of the heat-sensitive transfer recording medium include those in which a heat-softening coloring material layer is provided on a support shown below.

Examples of the support include polyethylene terephthalate, which has good heat resistance and high dimensional stability.

The heat-softening coloring material layer contains at least a coloring material and a heat-melting substance.

The coloring material can be appropriately selected from inorganic pigments, organic pigments, dyes, etc., and includes, for example, carbon black.

The content of the coloring material in the heat-softening coloring material layer is usually 5.
-40% by weight, preferably 10-30% by weight.

The heat-melting substance is not particularly limited as long as it does not impede the object of the present invention, but preferably Yanagimoto MJP-
It is a wax whose melting point, measured using Type 2, is within the range of 50 to 100°C.

Examples of the wax include paraffin wax.

The content of the heat-melting substance in the heat-softening coloring material layer is:
Usually, 5 to 4
Within the range of 0% by weight, preferably 10-30% by weight
is within the range of

The heat-softening coloring material layer may contain a thermoplastic polymer or the like in addition to the coloring material and the heat-melting substance.

The heat-softening coloring material layer can be coated on the support by employing a hot melt coating method, an aqueous coating method, a coating method using an organic solvent, or the like.

After applying the heat-softening coloring material layer in this manner, the heat-sensitive transfer recording medium can be obtained by performing a drying step 1, a surface smoothing treatment step, etc., if desired, and then cutting into a desired shape.

The printing portion 2 is formed on the transparent support l using the thermal transfer recording medium.

The thermal transfer method is not particularly limited, and for example, a method using the most typical thermal head as a heat source can be suitably used.

The printed image portion 2 formed on the transparent support 1 may be one in which the printed image itself obtained by thermal transfer has adhesive properties when the label is attached to an adherend.

Furthermore, the adhesive portion 3 may be further formed using the printed image.

That is, since the image printing section 2 contains a heat-fusible substance, the label can be attached to the adherend by, for example, a heat bonding method.

In addition, in the invention according to claim 2, the shape of the printing image portion 2 has a positional relationship that is a mirror image of the shape of the desired printing image.

If the desired print image is not surface symmetrical, the print image portion 2 having the mirror image positional relationship cannot be recognized as the desired print image through the transparent support l when a label is attached. can.

The adhesive section 3 has a function of bonding the transparent support l provided with the image forming section 2 to an adherend.

The adhesive portion 3 is usually formed by applying an adhesive onto the transparent support layer 1.

The adhesive can be used to attach the transparent support l to an adherend and is not particularly limited as long as it does not impede the object of the present invention. For example, pressure-sensitive adhesives, thermosetting adhesives, etc. Adhesives, rewetting adhesives, etc. may be mentioned.

Specific examples of the pressure sensitive adhesive include natural rubber,
Examples include chloroprene rubber-based, butyl rubber-based, polyacrylic ester-based, nitrile rubber-based, polysulfide-based, silicone rubber-based, and styrene-butadiene rubber-based adhesives.

Among these, preferred are natural rubber, gloloprene rubber, styrene butadiene rubber, butyl rubber, and polyacrylic acid ester adhesives.

Specific examples of the thermosetting adhesive include phenolic,
Examples include epoxy, urea, melamine, resorcinol, polyurethane, polyester, and polyaromatic adhesives.

Among these, preferred are phenolic and epoxy adhesives.

Specific examples of the rewetting adhesive include water type rewetting adhesives such as glue, dextrin, and gum arabic, and solvent type rewetting adhesives such as synthetic rubber.

Among these, gum arabic and synthetic rubber are preferred.

Further, the adhesive may include a tackifier, a plasticizer, a filler,
Anti-aging agents and the like may be included as appropriate.

The tackifier and the plasticizer have the effect of making the transparent support 1 and the adherend compatible, and the filler has the function of
The anti-aging agent has the effect of increasing the strength of the adhesive part 3, and the anti-aging agent has the effect of suppressing modification of the composition of the adhesive part 3.

The tackifier is a polyterpene resin.

Examples include rosin esters and derivatives thereof, oil-soluble phenol resins, coumaron indene resins, petroleum hydrocarbon resins, and the like.

Examples of the plasticizer include mineral oil, liquid polybutene, liquid polyacrylate, and lanolin.

Examples of the filler include silica, zinc white, titanium oxide, clay, aluminum hydroxide, calcium carbonate, mica, and the like.

Examples of the anti-aging agent include anti-aging agents for rubber, dithiocarbamates, antioxidants, metal chelating agents, and the like.

Furthermore, the adhesive portion 3 may contain a coloring material if necessary.

Note that, as the coloring material, a coloring material similar to the coloring material used in the softening coloring material layer of the thermal transfer recording medium can be suitably used.

Next, the method for manufacturing the label of the present invention will be explained below.

The invention according to claim 3 provides that after forming the image portion 2 on the transparent support l using the thermal transfer recording medium,
In this method, the adhesive portion 3 is formed on the same plane on which the printed image is formed.

The heat-sensitive transfer method using this heat-sensitive transfer recording medium is not different from a normal heat-sensitive transfer recording medium recording method, but will be explained by taking as an example the case where the most typical thermal head is used as the heat source.

First, the heat-softening coloring material layer of the heat-sensitive transfer recording medium and the transparent support 1 are brought into close contact with each other. A heat pulse is applied by a thermal head from the back side of the print head to locally heat the heat-softening coloring material layer corresponding to the image area 2.

The temperature of the heated portion of the heat-softening coloring material layer increases, and the heated portion is quickly softened and transferred onto the transparent support l.

Next, after forming the image part 2 on the transparent support l in this way, the image part 2 is placed at a desired position on the same plane as the image part 2, for example, as shown in FIGS. 1 and 2. Adhesive part 3
form.

The adhesive portion 3 is formed by applying the adhesive onto the transparent support l.

Note that the adhesive part 3 is usually formed by applying an adhesive in the form of a flat film on the transparent support l, but by applying the adhesive in the form of particles, it does not curl even with changes in temperature and humidity. You can also create non-curl labels.

As a method for applying the adhesive, known methods can be suitably adopted, such as brush coating method, roller method,
Examples include the spreader method and the Mayer bar method.

The thickness of the adhesive applied cannot be determined unconditionally depending on the adhesive used, but it is usually 0.5 to 5000#.
Lm, preferably 1 to 50 pm.

In addition, the adhesive part 3 has a subbing layer on the transparent support l for the purpose of increasing the adhesiveness between the adhesive part 3 and the transparent support l, or a subbing layer having other functions. It may also be provided through the

Further, in the transparent support l on which the image forming part 2 and the adhesive part 3 are formed, for the purpose of protecting the adhesive part 3 and the image forming part 2, the surface of the adhesive part 3 or the adhesive part 3 and the adhesive part 3 are coated. A release paper may be provided on all sides on which the image portion 2 is formed.

The transparent support l on which the image forming part 2 and the adhesive part 3 are formed in this way is cut to a desired size, for example, an inner diameter of 75 mm.
It is used as a label in the form of a roll or sheet wound around a core of ~78 mm.

The invention according to claim 4 provides a transparent support 1k.

The present invention is similar to the invention described in claim 3, except that after forming the adhesive portion 3, the printing portion 2 is formed using a thermal transfer recording medium on the same plane on which the adhesive portion 3 is formed.

In addition, when forming the adhesive part 3 with the pressure-sensitive adhesive, the position where the image forming part 2 will be formed later is determined in advance, and then the adhesive part 3 is formed on the transparent support 1 at a position other than the above-mentioned position. It is preferable to form 3.

The invention according to claim 5 provides a method for forming an image portion 2 having a mirror image positional relationship with a desired image on the transparent support l using the thermal transfer recording medium, and then transferring the image. The present invention is the same as the invention described in claim 3 except that the adhesive portion 3 is formed on the same plane.

As shown in FIGS. 1 and 2, the image portion 2 obtained by the thermal transfer recording medium is in a mirror image positional relationship with the desired image. When a label having the above-mentioned label is attached, it can be recognized as a desired imprint image through the transparent support l.

The invention set forth in claim 6 is the same as the invention set forth in claim 4, except that the image portion 2 is in a mirror image positional relationship with the desired print image.

Next, the method of attaching a label according to the present invention will be described below.
The cases in which the adhesive used is a pressure-sensitive adhesive, a thermosetting adhesive, and a rewetting adhesive are shown below.

In labels whose adhesive is a pressure-sensitive adhesive, the adhesive part 3 is usually protected by the release paper, and when pasting, the i4
The paper s is removed and the adherend and the adhesive portion 3 are adhered in close contact with each other.

This label can be applied by hand or by using a commercially available labeling machine, but in consideration of work efficiency and the like, it is preferable to use a labeling machine.

A label whose adhesive is a thermosetting adhesive is attached to an adherend by bringing the adhesive portion 3 of the label into close contact with an adherend and melting the adhesive by heating.

For the heating, a known heating means can be suitably employed, and for example, a high wave heating device or the like can also suitably be used.

Note that the heating temperature is usually 120 to 180°C.

The heating time is usually 8 to 20 seconds.

Labels whose adhesive is a rewetting adhesive are those which are activated by wood or the like and then adhered to an adherend.

This label can be applied by hand or by using a commercially available labeling machine, but in consideration of work efficiency and the like, it is preferable to use a labeling machine.

The label is attached to the adherend in this way.

Since the transparent support 1 also functions as a protective layer for the image area 2, the label has excellent scratch resistance.

C Example 1 Next, examples and comparative examples of the present invention will be shown, and the present invention will be explained in more detail.

(Example 1) A heat-sensitive transfer recording medium in which the following heat-softening coloring material layer composition is coated on a polyethylene terephthalate film with a thickness of 4.5 μm is used, and the desired print image and mirror image positional relationship are used. As shown in FIG. 1, an image portion 2 was formed on a polyethylene terephthalate film having a thickness of 50 p and m using a thermal transfer printer capable of printing an image.

Next, as shown in FIG. 1, the following adhesive composition was applied to the same plane as the surface on which the image forming part 2 was formed, so that the dry film thickness was 2.
The adhesive portion 3 was formed by applying the adhesive to a thickness of 0 gm.

Note that a roller method was used for application.

Heat softening Composition for material layer Ester wax fist --- 7 parts by weight Polyethylene vinyl acetate 1111 -- 15 parts by weight Carbon black ## φψ fist -- 15 parts by weight 1 Acrylic adhesive: 100 parts by weight The label thus obtained was pressure sensitively adhered onto paper.

Next, scratch the printed image on the pasted label with your nail, and apply the printed image to I! The scratch resistance of the label was evaluated by observing the scratch resistance of the label.

As a result, no change in the printed image on the label was observed.

(Example 2) The adhesive composition described below was applied onto a polyethylene terephthalate film having a thickness of 8 Qpm so that the dry film thickness was 10 pm to form an adhesive part 3 as shown in FIG. 2.

Note that the Mayer bar method was used for application.

Next, as shown in FIG. 2, an image portion 2 was formed using a heat-sensitive transfer recording medium in which the same heat-softening colorant layer composition as in Example 1 was provided on a support.

Adhesive part composition Natural rubber... Φ... - SO Part by weight Styrene butadiene rubber 9...30ffi Amount fll Polyterpene resin 111111 @ 1111111 + 50 parts by weight Hydrogenated rosin triethyl glycol ester 111111...・1 part by weight Hydrogenated rosin glycerin ester Kouken・Kou・・・・9 Kai・−20 heavy fim antioxidant・ψ・・φ・・Φ・5 parts by weight Mica powder・・・・
會...Φ...10 parts by weight Next, the label thus obtained was pressure sensitively adhered onto paper.

Regarding the attached label, Same as the example construction Abrasion resistance was evaluated.

As a result of the test, no change in the printed image on the label was observed.

(Comparative Example 1) A heat-sensitive transfer recording medium in which the same heat-softening coloring material layer composition as in Example 1 was coated on a polyethylene terephthalate film with a thickness of 4.5 gm was used, and a polyethylene terephthalate film with a thickness of 50 JLm was used. An image portion was formed on top.

Next, Example 1 was applied to the surface opposite to the surface on which the printed image portion was formed.
A bonding part composition similar to the above was applied to a dry film thickness of 20 pm to form a bonding part.

Note that a roller method was used for application.

A scratch resistance evaluation test was conducted in the same manner as in Example 1 for the printed image of the obtained label.

As a result of the test, the printed image became illegible.

[Effect of the invention] According to this invention.

(1) The transparent support functions as a protective layer for the image area, so the image area has excellent scratch resistance. (2) The image area is formed using a thermal transfer recording medium, making it easy to use. It is possible to provide a label and a method for manufacturing the same, which have advantages such as being able to obtain a desired image area.

[Brief explanation of the drawing]

FIGS. 1 and 2 are diagrams showing the formation patterns of the printing part and adhesive part of the label of the present invention. FIG. 3 is a sectional view taken along broken line A in FIG. FIGS. 4 and 5 are cross-sectional views of the label of the present invention, illustrating the arrangement and relationship of the printing part and the adhesive part formed on the transparent support. ■... Transparent support 2... Imprinting section 3... Adhesive section Fig. 2 Fig. 3

Claims (6)

[Claims] (1) A label characterized in that an image area formed by a thermal transfer recording medium and an adhesive area are provided on the same plane side of a transparent support. (2) The label according to claim 1, wherein the printed image portion has a positional relationship that is a mirror image of the shape of the desired printed image. (3) An adhesive portion is formed on the same plane side on which the printed image portion was formed after the printed image portion is formed on the transparent support using a thermal transfer recording medium, according to claim 1. How to make labels. (4) The method for producing a label according to claim 1, wherein after forming the adhesive part on the transparent support, an image part is formed on the same plane side on which the adhesive part was formed using a thermal transfer recording medium. (5) An adhesive portion is formed on the same plane side on which the printed image portion was formed after the printed image portion is formed on the transparent support using a heat-sensitive transfer recording medium, according to claim 2. How to make labels. (6) The method for manufacturing a label according to claim 2, wherein after forming the adhesive portion on the transparent support, an image portion is formed on the same plane side on which the adhesive portion was formed using a thermal transfer recording medium.