JP2001214140A - Heat seal label and labeling method therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat seal label which does not require a release paper, has a good storageability, and is suitable for labeling containers made of various materials, such as almost cylindrical, box-like, or plastic-made deformed-shape containers for refreshing drinks, alcoholic beverages, medicines, food, etc., and a method for labeling therewith. SOLUTION: This heat seal label is prepared by forming a heat seal adhesive layer mainly comprising a thermoplastic resin, a tackifier, and a wax on one side of a substrate provided that the storage modulus of the adhesive layer at the temperature of labeling is 10 Pa to 5,000 Pa and that the storage modulus of the adhesive layer at 120 deg.C is 10 Pa to 5,000 Pa. In the method for labeling, the heat seal adhesive layer of a heat seal label prepared by forming a heat seal adhesive layer mainly comprising a thermoplastic resin, a tackifier, and a wax on one side of a substrate is heated and then the label is stuck to an adherend within 1 sec.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat seal label provided with a heat seal adhesive on one surface of a substrate and a method for attaching the label to a container. More specifically, soft drinks, alcoholic beverages,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat seal label suitable for labeling a substantially cylindrical container or a box-like container for medicines, foods and the like, and a deformable container made of a plastic material, and a labeling method thereof.

[0002]

2. Description of the Related Art Conventionally, labels are applied to glass bottles or plastic bottles of soft drinks, alcoholic beverages, pharmaceuticals, foods, etc. by directly applying a water-soluble adhesive such as casein or starch to the back surface of the label base material. A method of sticking with a labeler or the like, or a method of sticking a general adhesive label in which a top paper, an adhesive layer, and a release sheet are sequentially laminated with an automatic labeler or the like is adopted. However, in the case of a water-soluble pressure-sensitive adhesive, since the water-soluble pressure-sensitive adhesive is directly applied to the back surface of the substrate, wrinkles or curls are generated on the label, and there is a problem that the label becomes defective and the appearance is impaired. In the case of an adhesive label, an unnecessary release sheet is generated after labeling, which is not preferable from the viewpoint of resource saving. Accordingly, recently, delayed labels, heat seal labels, and the like that do not require a release sheet have been attracting attention.

[0003] The delayed label and the heat seal label each have a delayed adhesive and a heat seal adhesive laminated on one surface of a label base material, and exhibit adhesiveness when heated together. The difference between the two is that the former develops the desired adhesiveness only by heating, and the adhesiveness lasts for several hours, whereas the latter, the conventional heat-sealable label, has better adhesiveness obtained by heating than the former. Poor,
In addition, the adhesive property is lost simultaneously with cooling.
Accordingly, applicable labelers are different from each other, and the former mainly has a form in which a heating part for heating the label and a sticking part for sticking the label to the container are separated, and is called a delayed labeler. On the other hand, the latter is a pressure-integrated heating device having a pressure-bonding function simultaneously with label heating in order to supplement the adhesive performance of the heat-sealing adhesive having poor adhesion as described above, and is called a heat sealer. For this reason, the heat sealer usually has a high temperature of 120 ° C.
A high pressure of about 8 kPa is simultaneously applied to the label from the hot plate. Therefore, usable adherends are limited in form, material, and the like, and in particular, the form is limited to a flat surface, and is a cylindrical type such as a container for soft drinks, alcoholic beverages, medicines, foods, and the like, which is a field of application of the present invention. However, it is not suitable for a glass container or a plastic container which may be deformed or damaged by pressurization.

[0004] On the other hand, a delayed label maintains a good adhesive property for a long time as described above, so that the applicable labeler has a wide range, but due to the pressure-sensitive adhesive composition, the storage stability of the label and the applicable container are limited. There is. That is, in the delayed adhesive, a solid plasticizer such as dicyclohexyl phthalate as an essential component is generally pulverized to about several microns and blended. This solid plasticizer is melted by heating,
Although it exhibits adhesiveness, it recrystallizes (solidifies) over time. For this reason, the transparent pressure-sensitive adhesive layer becomes opaque (white solidified) together with the recrystallization of the solid plasticizer when it is melted. In the case of products to be extruded, if the container is deformed (squeezed), the label is peeled off, so that it is not applicable. Regarding the storability, although the cause is unknown, there is no problem immediately after applying the delayed adhesive to the label substrate, but the above-mentioned solid plasticizer precipitates out with the passage of time, and a white powder is formed on the adhesive applied surface. Occurred and a problem occurred during printing.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a heat-sealable label which does not require a release paper and has good storability. The heat-sealable label is composed of various materials, such as soft drinks, alcoholic beverages, pharmaceuticals and foods. An object of the present invention is to provide a heat seal label suitable for labeling a substantially cylindrical container, a box-shaped container, a deformable container made of a plastic material, and the like, and a labeling method therefor.

[0006]

SUMMARY OF THE INVENTION The present invention proposes a labeling method which is impossible with a conventional heat seal adhesive by optimizing the viscoelasticity of the heat seal adhesive during heating and melting. In particular, in terms of material, the dynamic viscoelasticity of the heat seal adhesive when it is heated and labeled, and the heating temperature and the time from application to the adherend after heating are particularly important on the apparatus.

That is, the heat seal label of the present invention is used for labeling a heat seal label in which a heat seal adhesive layer mainly composed of a thermoplastic resin, a tackifier and wax is provided on one surface of a substrate. Storage elastic modulus of the heat seal adhesive under the temperature condition of
The storage elastic modulus of the heat seal adhesive at 20 ° C. is:
10 Pa to 5000 Pa, preferably 50 Pa to 100
The heat seal label is 0 Pa, more preferably 100 Pa to 800 Pa.

[0008] The softening point of the heat seal adhesive is also an important factor affecting the quality of the heat seal label. In the present invention, it is particularly important to optimize the viscoelasticity which is the property when the adhesive softens. That's it. In other words, the softening point is the temperature at which the resin begins to soften. If the softening point is low, the storage stability (blocking) of the label is poor, and if it is high, a higher heat source is required for the labeling device, which is economically disadvantageous. Incidentally, an appropriate softening point is about 60 ° C. to 110 ° C. Therefore, the storage elastic modulus of the heat seal adhesive of the present invention is 120.
It can be represented by the measured value at ° C.

The temperature at the time of labeling is as follows:
Any temperature may be used as long as the temperature is not lower than the softening point of the adhesive and has an appropriate storage elastic modulus, and the present invention has attempted to optimize the labeling suitability by assuming that the temperature employed in a normal labeling apparatus is 120 ° C. Even if the set temperature is changed in accordance with the softening point, good labeling suitability is exhibited as long as the storage elastic modulus at that temperature is within the range of the present invention.

Further, the heat capacity of the heat seal adhesive is 1
It is preferably at most 30 mJ / mg, more preferably at most 100 mJ / mg, because it can cope with changes in the heating temperature and the labeling speed under the labeling conditions, particularly at low temperatures and high speeds.

[0011] The labeling method for a heat seal label of the present invention is a method for labeling a heat seal label having a heat seal adhesive layer mainly composed of a thermoplastic resin, a tackifier, and wax on one surface of a substrate. This is a method for labeling a heat seal label to be attached to an adherend within 1 second after heating the seal adhesive layer. The means for heating and adhering is preferably a labeling device for a delayed label, and the heating is performed so that the storage elastic modulus of the heat seal adhesive is 10 Pa to 5000 Pa, preferably 50 Pa to 10 Pa.
It is preferable to heat the heat-sealable adhesive layer to a temperature of 00 Pa, more preferably 100 Pa to 800 Pa. Alternatively, the heat seal adhesive layer is
It is preferable to heat so that it may be 00 to 160 ° C.
Further, the heat capacity of the heat seal adhesive is 130 mJ / m.
g or less, preferably 100 mJ / mg or less.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have conducted various studies on the types and amounts of the thermoplastic resin, tackifier and wax constituting the heat seal adhesive, and found that the temperature at the time of labeling is different. The storage elastic modulus of the heat seal adhesive is 10 Pa to 5000 Pa, preferably 50 Pa to 100 Pa.
It has been found that a pressure of 0 Pa, more preferably 100 Pa to 800 Pa, has good adhesiveness in a delayed label labeling apparatus containing a solid plasticizer to be attached to a cylindrical container. The storage elastic modulus of a normally used delayed adhesive is about 1000 Pa at 120 ° C., and it is possible to apply a general delayed label with a labeling device. Further, in the present invention, by finding an appropriate range of the storage elastic modulus of the heat-sealable adhesive in a range lower than the storage elastic modulus of the general delayed adhesive, during labeling, it is possible to sufficiently bond with a lighter pressure. Further, the present invention can be applied to other soft containers such as glass bottles which are more likely to be damaged or deformed.

When the storage elastic modulus of the heat-sealable adhesive is less than 10 Pa at 120 ° C., the fluidity of the adhesive layer is large, that is, the adhesive layer has a low viscoelasticity, so As a result, the problem that the label is displaced occurs, and the label penetrates into the base material so much that the thickness of the adhesive layer effective for adhesion cannot be maintained. On the other hand, if the pressure exceeds 5000 Pa, the heat seal adhesive layer has a high viscoelasticity and cannot be applied by heating alone at the time of application, and at the same time, a pressure of about 98 kPa is required. It is difficult to apply, especially to cylindrical containers, glass containers, plastic containers, and the like.

The storage elastic modulus in the present invention is defined as a dynamic viscoelasticity measuring device (an example of a measuring device is R
HEOVIBRON DDV-25FP)
It refers to the cosine component of the phase angle δ of the dynamic complex modulus obtained when the adhesive resin formed into a plate having a thickness of mm is heated to 120 ° C. or the like and subjected to shear deformation at a frequency of 1 Hz. In the case of a heat-sealable label, the adhesive layer may be peeled off so that no impurities are mixed, and this may be used as a measurement sample.

Delayed labeling devices can be broadly classified into three types depending on the structure of the heating device. That is, 100 to 50 on the surface of the label coated with the adhesive layer.
A hot air heating type labeler that activates the adhesive layer by applying hot air of about 0 ° C., and a hot plate heated at about 100 to 200 ° C. is brought into contact with the opposite side of the adhesive applied surface of the label to form the adhesive layer. A hot plate heating type labeler, a hot air, and a hot plate combined type labeler that activates. In particular, in a hot air heating type labeler, the time until application is important.

The adjustment of the time until sticking depends on the distance between the hot air device and the sticking device, but in most cases can be adjusted by the speed of the labeling device. That is, it is preferable to apply the label at a high temperature and at a high speed so that the adhesive layer of the label is sufficiently softened and falls within the range of the storage elastic modulus of the present invention.

In other words, it is necessary to use the heat seal label of the present invention, heat the label to a temperature at which the storage elastic modulus falls within the range of the present invention, and further attach the label to a container or the like within 1 second. It is. By the way, if the time until the completion of the application exceeds 1 second, the heat seal adhesive layer becomes high in elasticity at the same time as cooling, so that the adhesiveness (easiness of wetting to the adherend) decreases. Disadvantageous for labeling.

The modulus of elasticity of the heat seal adhesive depends on the heating amount of the labeling device, that is, the heating temperature and the labeling speed. Therefore, even if there is no particular problem under normal conditions, if the heating temperature is lowered for energy saving or the like and high-speed operation is performed for efficiency, there is a possibility that the amount of heat is insufficient and the adhesiveness is reduced.

The present inventors have studied variously the relationship between the above-mentioned change in the heating conditions and the adhesiveness of the heat seal label, and found an appropriate condition for the heat capacity of the heat seal adhesive. That is, a commercially available delayed labeler Koyo Automatic Machinery Co., Ltd. “LR20
0K type ”,“ LEB-K type ”made by the company,“ Thermolabeler AL type ”made by Takara,“ 412 type ”made by HAPA, the setting range of the adjustable heating temperature and labeling speed of each labeler is variously changed. As a result of evaluating the adhesiveness of the heat seal label, the heat capacity of the heat seal adhesive was 130
When the amount is at most mJ / mg, preferably at most 100 mJ / mg, good adhesiveness can be obtained, and the present invention has been achieved. By the way, if it exceeds 130 mJ / mg, the adhesiveness tends to be inferior under low temperature and high speed conditions.

Incidentally, the heat capacity in the present invention is defined as the difference between the temperature of the adhesive resin (solid content: about 5 mg) and the rate of temperature rise of 3 ° C. using a differential heat measuring device (“DS22 module”, Seiko Instruments Inc. as an example of the specific device). 1 minute from room temperature
The heat capacity obtained when measured up to 50 ° C. is shown. In the case of a heat seal label, the adhesive layer may be peeled off so that impurities do not mix, and the heat capacity may be measured using the adhesive layer as a measurement sample.

The composition of the heat seal adhesive of the present invention is mainly composed of a thermoplastic resin, a tackifier and a wax.
As the thermoplastic resin, ethylene-vinyl acetate copolymer, ethylene-methacrylic acid ester copolymer, ethylene-acrylic acid ester copolymer, styrene-butadiene-styrene copolymer, styrene-isoprene-styrene copolymer and the like Thermoplastic elastomers, olefinic polymers such as amorphous polyalphaolefins such as polyethylene and polypropylene, etc., and are not particularly limited, but have a softening point of 40 ° C to 100 ° C, preferably 60 ° C to 80 ° C. Are applicable. By the way, if the softening point is lower than 40 ° C., the adhesive layer becomes tacky, and it is easy to block, so that a release sheet may be required. Conversely, if the softening point exceeds 100 ° C., the adhesive layer at the time of heating may be too hard, and the adhesiveness may be insufficient. These thermoplastic resins are used alone or in combination. The molecular weight of the thermoplastic resin is on the order of thousands to tens of millions, preferably on the order of tens of thousands to millions. By the way, if it is less than several thousand, the cohesive force after bonding is insufficient, and if it exceeds tens of million, it becomes a high elastic body and the adhesiveness may be insufficient.

Examples of the tackifier include rosin, polymerized rosin, disproportionated rosin and derivatives thereof, phenol-modified resins such as polyterpene resins, terpene phenols, and rosin phenols, alkylphenol resins, and coumarone resin.
Indene resin, xylene resin, aliphatic hydrocarbon resin, alicyclic saturated hydrocarbon resin, aromatic hydrocarbon resin and its hydrogenated product, styrene resin, vinyl toluene-α-methylstyrene copolymer and the like, Although not particularly limited, those having a softening point of 150 ° C. or less, preferably 50 ° C. to 130 ° C. can be applied. By the way, the softening point is 150
If the temperature exceeds ℃, the adhesiveness during heating may be reduced.
These tackifiers are used alone or in combination.

As the wax, paraffin wax,
A petroleum wax such as montan wax, carbana wax, candelilla wax, or micro wax, or a synthetic wax such as polyethylene wax or polypropylene wax is used, and is not particularly limited, but has a melting point of 50 ° C to 200 ° C, preferably It has a molecular weight of 300 to 2,000, preferably 50 to 120 ° C.
Those from 0 to 1500 are applicable. By the way, the melting point is 50
If the temperature is lower than 200C, a problem may occur in the storage stability of the label. On the contrary, if the melting point exceeds 200C, problems such as a decrease in adhesiveness upon heating may occur. On the other hand, if the molecular weight is less than 300, the pseudo-collecting force of the adhesive layer may decrease. Conversely, if the molecular weight is too high, the viscosity of the wax will increase,
The adhesive layer becomes hard, and the adhesiveness may be insufficient.

The solid content of the thermoplastic resin, the tackifier and the wax is about 20 to 60% by mass, about 20 to 60% by mass and about 20 to 60% by mass, respectively, based on the total solid content. It is appropriately adjusted depending on the properties and storage stability.

The method of controlling the storage modulus includes adjusting the glass transition temperature and the molecular weight of the thermoplastic resin, the softening point of the tackifier, the melting point and the molecular weight of the wax component, and the like. It is also effective to improve the compatibility of various materials by adjusting the mixing ratio and changing the composition of each of the thermoplastic resin, the tackifier, and the wax component.

As a method for controlling the heat capacity, the amount of the thermoplastic resin, which is a relatively high molecular weight substance, in the adhesive composition is reduced within a range not exceeding an appropriate range of adhesive properties, elastic modulus and the like. It is effective to select a thermoplastic resin having a small heat capacity. Incidentally, among the above examples, ethylene-vinyl acetate copolymer, ethylene-methacrylic acid ester copolymer, ethylene-acrylic acid ester copolymer, styrene-butadiene-styrene copolymer and the like are preferred.

The physical properties affecting the adhesiveness of the heat seal adhesive include the dynamic wettability of the adhesive. As an appropriate range of the dynamic wettability, for example, when a contact angle when pure water is dropped is measured, it is 130 ° or less, preferably 1 °.
There is no particular problem if it is 10 ° or less. By the way, if it exceeds 130 °, the adhesiveness becomes poor.

Further, in addition to these, an antioxidant and a filler may be used in the adhesive layer. As an antioxidant, phenol-based, thioether-based, phosphite-based can be used alone or in combination, and as a filler, calcium carbonate, clay, talc, barium sulfate, zinc oxide, magnesium oxide, water Examples include aluminum oxide, hydrous silicic acid, and silicic anhydride.

Although not particularly limited, the application amount of the heat seal adhesive is 3 to 30 g / dry weight.
It is appropriately adjusted in the range of m ² . Preferably 5 to 15 g /
m ² . By the way, if the coating amount is less than 3 g / m ² , sufficient adhesiveness may not be obtained when used as a label. On the other hand, if it exceeds 30 g / m ² , the adhesiveness obtained will be saturated, which is not economically preferable.

The application area of the heat seal adhesive layer to the surface substrate can be partially applied as long as the purpose and performance are not impaired. The coating pattern may be a band, a staggered pattern, or a spot pattern.

As a method for applying the heat seal adhesive of the present invention onto a substrate, a general coater or printing machine equipped with a heating and heat retaining device can be applied, and a reverse roll coater or a gravure roll can be used as a coater head. Roll coater such as coater, resin extrusion die coater,
Various coating devices such as lip coaters, gravure plates,
It is performed by various printing devices such as letterpress and screen.

As the material of the substrate used for the heat seal label of the present invention, various papers, synthetic papers, films,
Metal foils, non-woven fabrics, woven fabrics and the like, and sheets obtained by appropriately laminating them, are exemplified. In the case of using a hot plate heating type high-speed labeler, a substrate having excellent heat resistance is preferable.
Of course, the pressure-sensitive recording layer, the heat-sensitive recording layer,
Layers having various functions such as a thermal transfer image receiving layer, an ink jet recording layer, a pigment coating layer, and a metal deposition layer may be provided. On the other hand, a barrier layer may be provided on the surface to which the heat seal adhesive is applied to reinforce the strength or prevent the heat seal adhesive from penetrating into the base material and reducing the adhesive function. When used as a label, printability and the like are required. In particular, when used as a label to be attached to a glass bottle containing a liquid such as soft drink, liquor, medicine bottle, or the like, it is preferable to use a substrate having excellent water resistance.

Further, among the above-mentioned labeling apparatuses, in the case of a type in which a hot plate is brought into contact with the substrate surface of the heat seal label (the above-mentioned heating apparatus), the thermal conductivity of the substrate affects the adhesiveness. It is preferable to use a substrate having high thermal conductivity. Incidentally, in the case of a paper substrate, a substrate having a high density and a high surface smoothness are generally preferable, and in the case of a film substrate, physical property data of various substrate manufacturers can be referred to.

The printing of the heat seal label of the present invention includes pre-printing (printing on the base material in advance and then applying a heat seal adhesive), and post-printing (applying the heat seal adhesive on the base material first). , Then print), simultaneous printing (printing on the substrate and applying heat-seal adhesive almost simultaneously),
Is selected.

[0035]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but it is needless to say that the present invention is not limited to these examples. In the examples, “parts” and “%” indicate “parts by mass” and “% by mass” unless otherwise specified.

Example 1 "Production method of heat seal label" Ethylene vinyl acetate copolymer having a softening point of 62 ° C (trade name "Evaflex P-
1407 ", manufactured by DuPont-Mitsui Polychemicals) 25
Part, tackifier having a softening point of 60 ° C (trade name “Alcon P-
70 "(manufactured by Arakawa Chemical Industries, Ltd.), 30 parts, paraffin wax having a melting point of 61 ° C (trade name" Paraffin Wax-14 ")
0 ", manufactured by Nippon Seiro Co., Ltd.) was adjusted in a container kept at 140 ° C. and heat-sealing adhesive (1) having a solid content of 100% was prepared.
The storage elastic modulus at 20 ° C. is 500 Pa and the heat capacity is 90
mJ / mg). 79.1 g of this adhesive
/ M ² double-sided coated paper (product name “OK Topcoat”,
One side of Oji Paper Co., Ltd.) was applied to a solid content of 10 g / m ² using a pan-feed roll coater while heating to a temperature of 140 ° C. to obtain a heat seal label.

(Labeler Conditions) The obtained heat-sealed label was placed on a delayed labeler (trade name "Thermo Labeler A").
L type ", manufactured by Takara Co., Ltd.), labeling speed 30 m / min (time until label attachment is 1.0 second), hot air set temperature 400 ° C. (heat seal label surface temperature 1
(20 ° C.) and a pressure of 4.5 kPa under a condition of labeling a cylindrical container of a glass bottle. The storage elastic modulus of the obtained heat seal adhesive was measured using a dynamic viscoelasticity measuring device (trade name “D
DV-25FP "(manufactured by Orientec), and the heat capacity is measured by a differential heat measurement device (trade name" DSC22 Module ", manufactured by Seiko Instruments Inc.). The paper surface temperature is measured by a spot type digital radiation thermometer (product). (505A, manufactured by Minolta Camera Co., Ltd.).

Example 2 30 parts of Evaflex P-1407, Alcon P-7
0 and 30 parts of paraffin wax-140 in the same manner as in Example 1 except that 30 parts of paraffin wax 140 were used.
Storage elastic modulus at 0 ° C. is 950 Pa, 118 mJ / m
g) was prepared to obtain a heat seal label. Example 1 was repeated except that the labeling conditions were a labeling speed of 40 m / min (time until label application was 0.7 seconds) and a hot air setting temperature of 400 ° C. (paper surface temperature of a heat seal label of 110 ° C.).
Labeling was performed in the same manner as described above.

Example 3 35 parts of Evaflex P-1407, 30 parts of Alcon P-100 (manufactured by Arakawa Chemical Industries) having a softening point of 100 ° C. as a tackifier, and 35 parts of paraffin wax-140 A heat-sealing adhesive was prepared in the same manner as in Example 1 except that the storage elastic modulus at 120 ° C. was 4100 Pa,
132 mJ / mg), and the base material was 85.0 tsubo.
g / m ² single-sided art paper (trade name “Gold piece art paper”, manufactured by Oji Paper Co., Ltd.) to prevent the adhesive from penetrating into the base paper surface of the base material by 10 μm polyethylene. A heat seal label was obtained in the same manner as in Example 1 except that the substrate was subjected to lamination. Labeling conditions were set at a labeling speed of 60 m / min (time until label attachment: 0.3 seconds),
Labeling was performed in the same manner as in Example 1 except that the hot air set temperature was 450 ° C. (the paper surface temperature of the heat seal label was 120 ° C.) and the adherend was a polyethylene cylindrical container.

Example 4 25 parts of Evaflex P-1407, Alcon P-7
0 and 30 parts, and 45 parts of paraffin wax having a melting point of 47 ° C. (trade name “Paraffin Wax-115” manufactured by Nippon Seiro Co., Ltd.) except that the heat seal adhesive (120 ° C.) was used in the same manner as in Example 1. Storage elastic modulus of 4
0Pa) to obtain a heat seal label. Labeling was performed in the same manner as in Example 1.

Comparative Example 1 40 parts of Evaflex P-1407, Alcon P-1
A heat seal adhesive (having a storage elastic modulus at 120 ° C. of 5,500 Pa) was prepared in the same manner as in Example 1 except that 30 parts of 00 and 30 parts of paraffin wax-140 were used to obtain a heat seal label. Labeling was performed in the same manner as in Example 1.

Comparative Example 2 25 parts of Evaflex P-1407, Alcon P-7
0 and 25 parts of paraffin wax-115 in the same manner as in Example 1 except that 25 parts were used.
A storage elastic modulus at 20 ° C. was 8 Pa) to obtain a heat-sealed label. Labeling was performed in the same manner as in Example 1.

Comparative Example 3 Using the heat-sealed label obtained in Example 1, the labeling speed was 20 m / min (the time until label application was 1.5
Second), and labeling was performed in the same manner as in Example 1 except that the hot air set temperature was 380 ° C. (paper surface temperature of the heat seal label was 120 ° C.).

[Evaluation] With respect to the heat seal labels obtained as described above, the labeling suitability of the delayed labeler was evaluated for the following items, and the results are shown in Table 1.

[Appearance] The state of attachment of the heat seal label after labeling was evaluated according to the following criteria. Good: There is no sticking defect, and the labeling suitability is good. Poor: The label cannot be attached or adhered and falls. Bad: Can be attached, but the label is misaligned.

[Adhesive Strength] The attached label was peeled at an angle of 90 °.
°, the adhesive force when peeled at a peeling speed of 0.3 m / min was measured. In addition, it is preferable that the adhesive strength is high, and it is preferable that the substrate is broken.

[Comprehensive evaluation] A: No problem in practical use. Δ: No problem in practical use, but it is preferable to select labeling conditions for use. ×: Practically problematic.

[Others] With respect to the heat-sealed labels obtained in Examples 1 to 4, the adhesive layer had no adhesiveness at room temperature, and after being stored for 1 month in an atmosphere of 30 ° C., the same evaluation as above was performed. As a result, the label appearance was the same, and the adhesive strength was hardly changed, and good quality was confirmed.

[0049]

[Table 1]

Further, as the heat seal adhesives having different heat capacities, the heat seal labels described in Examples 1, 2 and 3 were used, and the same delayed labeler (trade name "Thermo Labeler AL type", manufactured by Takara Corp.) ) At a labeling speed of 60 m / min (time until label application is 0.3 seconds), a hot air setting temperature of 400 ° C. (paper temperature of the heat seal label of 105 ° C.), and a pressure of 4.5 kPa under the conditions of a glass bottle cylinder. Table 2 shows the evaluation results of the adhesiveness when labeling the containers as Example 5, Example 6, and Example 7, respectively.

[0051]

[Table 2]

[0052]

As described above, the present invention does not require a release paper and is composed of various materials, and is used for labeling a substantially cylindrical container for soft drinks, alcoholic beverages, pharmaceuticals, foods, etc., and a deformable container made of a plastic material. It is a heat-sealing label suitable for a container, and is particularly excellent in labeling suitability for a container made of a soft packaging material, and is a labeling method that can be applied without any problem with an existing delayed labeler.

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3E095 AA03 AA07 EA22 EA40 FA16 4J004 AA04 AA05 AA06 AA07 AA09 AA10 AA12 AB03 CA01 CA02 CA08 CB01 CB02 CC02 CC03 DB01 FA01 FA06 GA03

Claims (13)

[Claims] 1. A heat-sealing label having a heat-sealing adhesive layer containing a thermoplastic resin, a tackifier and a wax as a main component on one surface of a base material, wherein the heat-sealing is performed under a temperature condition for labeling. The storage elastic modulus of the adhesive is 1
A heat seal label having a pressure of 0 Pa to 5000 Pa. 2. The heat-sealing adhesive has a storage modulus of 50P.
The heat seal label according to claim 1, wherein the pressure is from a to 1000 Pa. 3. A heat-sealing label having a heat-sealing adhesive layer mainly composed of a thermoplastic resin, a tackifier and wax on one surface of a substrate, wherein the storage elastic modulus of the heat-sealing adhesive at 120 ° C. 10Pa-5000P
(a) a heat seal label; 4. The heat-sealing adhesive has a storage modulus of 50P.
The heat seal label according to claim 3, wherein a is from 1000 to 1000 Pa. 5. A heat sealing adhesive having a heat capacity of 130 mJ.
/ Mg or less, the heat seal label according to any one of claims 1 to 4. 6. The heat sealing adhesive has a heat capacity of 100 mJ.
/ Mg or less, the heat seal label according to any one of claims 1 to 4. 7. The heat seal label according to claim 1, wherein the heat seal label is heat-adhered by a delayed labeling device. 8. A heat-sealable label having a heat-sealable adhesive layer having a thermoplastic resin, a tackifier and a wax as main components on one surface of a substrate, and heating the heat-sealable adhesive layer for 1 second. Labeling method for heat seal labels to be adhered to adherends within 9. The method for labeling a heat seal label according to claim 8, wherein the means for heating and attaching is a labeling device for a delayed label. 10. The storage elastic modulus of the heat seal adhesive is 10
The method for labeling a heat seal label according to claim 8 or 9, wherein the heat seal adhesive layer is heated so as to have a temperature of Pa to 5000 Pa. 11. The storage modulus of the heat seal adhesive is 50.
The method for labeling a heat-sealing label according to claim 8 or 9, wherein the heat-sealing adhesive layer is heated to a temperature of Pa to 1000 Pa. 12. The heat-sealing adhesive layer according to claim 11, wherein
The method for labeling a heat seal label according to claim 8 or 9, wherein the label is heated to 0 ° C. 13. The heat capacity of the heat seal adhesive is 130 m.
The method for labeling a heat-sealed label according to any one of claims 8 to 12, which is not more than J / mg.