JP2016095338A - Heat-shrinkable label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container mounted with a label which suppresses rising of a label at the time of shrink, prevents the occurrence of wrinkles when the shrink has ended, and is excellent in appearance.SOLUTION: A heat-shrinkable label shrinks in a trunk outer peripheral direction of a container due to heat, is fixed to the container, and is made from a resin film. The label has a low friction region in the upper part, and has a high friction region in the lower end.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat-shrinkable label attached to a container by heat shrinkage.

  Labels for displaying contents are attached to bottle containers and bottles for beverages, seasonings, jams and the like. At present, a label made of a heat-shrinkable film stretched uniaxially is cut into a predetermined size in the stretching direction, and the cut ends are bonded to each other in a cylindrical shape and put on a bottle (Patent Document 1, etc.). Adhering one cut end to the container with an adhesive and wrapping it, and bonding the other cut end (Patent Document 2 etc.), then heat shrink in a shrink tunnel to which steam and hot air are applied, and close the container by shrink Things have been done.

JP 2009-96527 A JP 2008-145498 A

By the way, when the label is shrunk in the above-described shrink tunnel, for example, as shown in FIGS. 3 (a) and 3 (b), when the body has a recess, the label may rise upward as the shrink proceeds. is there.
In addition, if the friction coefficient between the printing surface and the PET bottle surface is high, the label may be wrinkled after shrinking, which causes a problem in appearance.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to suppress a label rising at the time of shrinking, prevent wrinkles from occurring after shrinking, and obtain a label mounting container having an excellent appearance.

  This invention is a heat-shrinkable label made of a resin film that shrinks in the outer circumferential direction of the container due to heat and is fixed to the container, and has a low friction region at the top of the label and a high friction region at the lower end. As a result, the above-mentioned problems have been solved.

  By this invention, even when the shape of the container is not a cylindrical shape or a rectangular shape, it is possible to suppress the rising of the lower end portion of the label at the time of shrinking and to suppress the generation of wrinkles at the time of shrinking. This makes it possible to obtain a label mounting container having an excellent appearance.

(A) The front view which shows the example of the heat-shrinkable label concerning this invention, (b) The side view of (a) Schematic diagram when the heat-shrinkable label shown in FIG. (A) Schematic diagram showing a state in which the bottle is covered with the heat-shrinkable label shown in FIG. 1, (b) Schematic diagram showing a state in which the label is thermally contracted (A) The front view which shows the other example of the heat-shrinkable label concerning this invention, (b) The side view of (a) (A) The schematic diagram which shows the state which affixes the heat-shrinkable label shown in FIG. 4 on a bottle, and winds around a trunk | drum, (b) The schematic diagram which shows the state which heat-shrinks a label

  The present invention relates to a heat-shrinkable label made of a resin film that is shrunk in the outer peripheral direction of the body of the container by heat and fixed to the container.

  As this heat-shrinkable label 11, as shown in FIGS. 1 to 3, a heat-shrinkable label 11 a that is wound around a mandrel and formed into a cylindrical shape and then placed on a container, or as shown in FIGS. An example is a heat-shrinkable label 11b that is wound around and directly attached to the outer peripheral surface of the body of the container using hot melt. In the following, the “heat-shrinkable label” may be simply referred to as “label”.

  First, a label 11a that is wound around a mandrel to form a cylindrical shape and is then put on a container is attached to a heat-shrinkable resin film 12 that mainly heat-shrinks in the circumferential direction (lateral direction in FIGS. 1A and 1B). The one side end 12a and the other side end 12b of the label 11a are cut ends cut in a direction perpendicular to the film flow direction. When the label 11a is heated, the side end portions 12a and 12b contract (hereinafter, this direction is referred to as "main contraction direction"). The length in the main contraction direction is at least the margin of the joining portion (the overlapping portion 13 described later) on the circumference of the largest diameter portion of the container (for example, the bottle 15 in FIG. 3) to which the label 11a is attached. It must be longer than On the other hand, if it is too long, it cannot be in close contact with the container even if it heat shrinks, so the length after heat shrinking heated away from the container needs to be smaller than the circumference of the maximum diameter portion of the container. Become.

  As such a resin film 12, if it is a heat-shrinkable film at least uniaxially stretched, a biaxially stretched film can also be used. As the heat shrinkable film, polyolefin film, polyester film, polystyrene film, polylactic acid film, foamed polyolefin film, foamed polyester film, foamed polystyrene film, foamed polylactic acid film, or these resins And a laminated film of two or more layers of these films. Among these, polyolefin films such as polyethylene and polypropylene, polyester films such as polystyrene films and polyethylene terephthalate, and laminates thereof are particularly desirable from the viewpoint of handling.

  The resin film 12 needs to be capable of causing the shrinkage necessary for so-called shrinking to the outer periphery of the container in the main shrinkage direction. Specifically, the heat shrinkage rate in the main shrinkage direction at 90 ° C. is preferably 5 to 85%, more preferably 30 to 60%.

  The thickness of the resin film 12 is preferably 30 μm or less, and preferably 26 μm or less in terms of cost and the global environment. If it is thicker than 30 μm, wrinkles may be more difficult even when the label rises, and the effect of the present invention may not be found. On the other hand, the lower limit of the thickness of the resin film 12 is not particularly limited, but may be 6 μm or more, preferably 10 μm or more from the viewpoint of handling.

  The label 11 a is configured by forming a printing layer 14 on one surface of the resin film 12. One surface of the resin film 12 on which the printed layer 14 is formed is a surface that becomes an inner side when mounted on the bottle, and is a lower surface in the side view of FIG. Actually, the printed layer 14 is formed by gravure printing or the like and is sufficiently thinner than the label 11 itself, but in the figure, it is shown thicker than the actual thickness in order to clearly show the arrangement.

A portion of the printed layer 14 that displays a design or content that matches the contents of the container (hereinafter may be referred to as a “printed pattern”) is formed using a paint of each color, and is colorless or colored and transparent. The basic tone may be used, and a white opaque paint may be applied. Depending on the types of the white opaque paint and the colorless and colored transparent paint, the dynamic friction coefficient of a specific part of the label described later can be set within the following predetermined range, that is, a high friction area and a low friction area. The back surface of the printed pattern, that is, the surface opposite to the printed layer 14 of the printed pattern is coated with a mat coating agent tailored to the design and a scratch-preventing medium for the purpose of protecting the label substrate. There is a case.
The printed pattern is enlarged and printed so that an appropriate display is obtained after the shrinkage.
Furthermore, the printing layer 14 is not provided on both end sides (12a, 12b) of the label 11 with a width of 1 to 10 mm in the flow direction of the substrate.

  Further, in the printed layer 14, a portion other than the printed pattern is an uncoated portion where a transparent paint is applied or no paint is applied. The transparent paint may be colorless or colored.

The shape of the container is not particularly limited as long as the target container can regulate shrinkage deformation at the time of shrinking, such as a substantially cylindrical shape, a substantially prismatic shape, and those provided with unevenness. Specially shaped containers such as containers with irregularities on the body, or containers with labels on the inclined part (bottle shoulder) where the diameter decreases from the body to the mouth, are raised. May be larger, so the use of the label of the present invention is more preferable.
The material of the container is not particularly limited, such as glass or synthetic resin. Examples of the synthetic resin include polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), and the like.

Next, a method for attaching the label 11a to the container will be described.
First, as shown in FIG. 2, the label 11a is wound around a mandrel 17 to obtain a cylindrical label 11a ′. Then, the overlapping portions of the side end portions 12 a and 12 b are joined to form the overlapping portion 13. Examples of the bonding method include a welding method using a known method such as laser light or heat sealing, and a bonding method using a hot melt adhesive, a UV hot melt adhesive, a UV adhesive, or the like.

Next, as shown in FIG. 3A, the cylindrical label 11a ′ is put on a container. 3 (a) and 3 (b) show a form in which a special PET bottle 15 made of a general PET is used as a container.
Then, the cylindrical label 11a ′ is heated with water vapor or the like to perform shrinking as shown in FIG.
The shrinking conditions are not particularly limited, and may be performed under the same conditions as those conventionally used for the material of the cylindrical label 11a ′.

Next, a label 11b that is directly wound around the body outer peripheral surface of the container using hot melt will be described with reference to FIGS. 4 (a) and 4 (b).
As shown in FIGS. 4 (a) and 4 (b), the label 11b to be used is the same as that shown in FIG. 1 (B) except that an adhesive layer 16 made of hot melt or the like is arranged on the other side end 12b on the surface of the printing layer 14. a) A label similar to the label 11a shown in (b) can be used.

Next, a method for attaching the label 11b to the container will be described with reference to FIGS.
First, as shown in FIG. 5 (a), the adhesive layer 16 disposed on the other side end portion 12b of the label 11b is adhered to the side surface of the bottle 15, wound around the body portion of the bottle 15, and one side end. The vicinity of the portion 12a is overlapped and bonded to the vicinity of the other side end portion 12b to form an overlapping portion 13 (shown in FIG. 5B). The shape of the bottle 15 is desirably a shape that can be adhered by at least the adhesive layer 16, and is otherwise the same as the container described above. The adhesive layer 16 may be provided at least in one place corresponding to the largest diameter portion of the bottle 15. Thereafter, as shown in FIG. 5B, as in the case of the label 11a, the label 11b is shrunk and thermally contracted in the main contraction direction so as to be in close contact with the bottle 15. The shrinking conditions are not particularly limited, and may be performed under the same conditions as in the past.

The printed layer 14 is formed on the label 11 (11a, 11b) as described above. When this printing layer 14 is formed from a plurality of layers, the coating layer 14 forms a layer that comes into contact with the bottle 15 when attached to the bottle 15. Depending on the type, one of a low friction region, a transparent high friction region, and a white high friction region is formed.
The low-friction region is applied by applying a white opaque paint having a predetermined dynamic friction coefficient, which will be described later, or a colorless or colored transparent paint (hereinafter sometimes collectively referred to as “low-friction paint”). This is a region to be formed. The transparent high-friction region is formed by applying a colorless or colored transparent paint having a predetermined dynamic friction coefficient, which will be described later (hereinafter sometimes referred to as “high-friction system transparent paint”). It is an area. Furthermore, the white high-friction region is a region formed by applying a white opaque paint having a dynamic friction coefficient that cannot form the low-friction region.
In addition, the part (uncoated part) of the label 11 in which the printing layer 14 is not formed has high friction and forms a high friction region. Here, the transparent high friction region, the white high friction region, and the uncoated high friction region are collectively referred to as a “high friction region”.

  The label 11 has the high friction region at the lower end portion in order to suppress the rising when the container is mounted by shrinking on the container. The lower end means a range of at least 1 mm from the lower end of the label 11 and at most a range from the lower end of the label 11 to 10 mm.

  Further, in order to prevent wrinkling of the label 11 at the time of shrinking, the low friction region is provided on the upper part of the label. The upper portion is a portion other than the lower end portion of the label, that is, a range from the lower end of the label to the upper end of the label by 10 mm or more, and the low friction region includes at least a range of at least 10 mm from the upper end of the label. Provided in the range.

And the said low friction area | region is formed by applying the low friction system coating material whose dynamic friction coefficient (measured by JIS K7125 method) of the coating film obtained by coating will be 0.1 or more and less than 0.5. The
Specifically, it is formed by applying the printing layer 14 described above. This dynamic friction coefficient is a dynamic friction coefficient between a coating film obtained by applying a low friction paint and a container material. The dynamic friction coefficient in this low friction region is preferably less than 0.5, and preferably 0.45 or less. If it is 0.50 or more, sufficient sliding cannot be obtained, and there is a possibility that the label after shrinkage will be wrinkled. On the other hand, the lower limit of the dynamic friction coefficient is preferably 0.1, and preferably 0.2. If it is smaller than 0.1, the mechanical suitability for attaching the label is deteriorated, which causes a problem.

  The low friction region at the top of the label is preferably provided in a strip shape in the main contraction direction. The width of the band (the length in the direction perpendicular to the main contraction direction) is preferably 1 mm or more, preferably 3 mm or more, more preferably 5 mm or more. If it is narrower than 1 mm, the effect of low friction does not appear sufficiently, and wrinkles may occur at the upper end during shrinking. On the other hand, the upper limit of the width is not particularly limited, and most of the upper part of the label may be a low friction region. In the upper part of the label, the dynamic friction coefficient in a region other than the low friction region is not particularly limited, and there may be a region having a dynamic friction coefficient of 0.50 or more.

By the way, when the low friction region is formed in the upper portion of the label 11, there may be a portion where the low friction region is interrupted. In addition to the low friction region, the white high friction region may be formed in the upper portion of the label 11, and in this case, there is a discontinuous portion in the low friction region or the white high friction region. There is. The low friction region may be provided so that the width of these discontinuous portions does not exceed 10 mm in the main contraction direction, and a band composed of the low friction region and the white high friction region may be formed. The width of the band at this time is the same as the width of the band composed of the low friction region described above. If the discontinuous part exceeds 10 mm in the main contraction direction, if the part is a high friction part, wrinkles may occur starting from this point.
The white high-friction region may be formed in the portion where the low-friction region is to be formed. The white opaque paint constituting the white high-friction region contains inorganic particles, so that there is little increase in flexibility due to heating. . For this reason, wrinkles are unlikely to occur in this white high friction region.

  On the other hand, the high friction region is coated with a transparent paint or white opaque paint in which the dynamic friction coefficient (measured by the JIS K7125 method) of the coating film obtained by coating is 0.5 or more and 0.8 or less. Or by uncoating. Specifically, it can be formed by coating a coating material having a high coefficient of dynamic friction with the container material or by an uncoated portion. This dynamic friction coefficient is a dynamic friction coefficient between the high friction region and the container material. The dynamic friction coefficient in this high friction region is preferably 0.5 or more and preferably 0.6 or more under the conditions measured by the JIS K7125 method. If it is less than 0.5, a sufficient rise-in suppressing effect cannot be obtained, which may lead to poor appearance of the mounted product. On the other hand, the upper limit of the dynamic friction coefficient is preferably 0.80, and preferably 0.75. If it is larger than 0.80, there will be a problem in mechanical suitability.

  The width of the high friction region at the lower end (length in the direction perpendicular to the main shrinkage direction) is preferably provided in a range of 1 mm or more and 10 mm or less at a portion 10 mm from the lower end of the label. If it is narrower than 1 mm, the effect of high friction does not appear sufficiently, and the rise during shrinking may increase. Note that the length of the high friction region (the length in the direction perpendicular to the main contraction direction) is not limited to a continuous length, and when the high friction region exists intermittently, the length of the high friction region It is preferable that the total thickness is half or more of the length in the main contraction direction. If it is out of the above range, the effect of preventing the rise during shrinking will not be sufficiently exhibited.

  The low friction region and the high friction region can be adjusted by the blending amount of the lubricant blended in the paint. As the lubricant, general ones blended in paints can be used. Polyolefin wax such as polyethylene wax, fatty acid amide, fatty acid ester, paraffin wax, polytetrafluoroethylene wax, carnauba wax and various waxes, cyclic silicone, etc. Silicones, silica particles, beads derived from unsaturated fatty acid esters, and the like.

The vinyl monomer of the beads derived from unsaturated fatty acid ester is not particularly limited, but unsaturated fatty acid ester, aromatic vinyl compound, vinyl cyanide compound, unsaturated dibasic acid or derivative thereof, unsaturated Examples include fatty acids or derivatives thereof.
As the unsaturated fatty acid ester, (meth) acrylic acid esters and the like can be used. In addition, the (meth) acryl of this invention means methacryl or acryl.

  Examples of the (meth) acrylic acid esters include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, i-propyl (meth) acrylate, and (meth) acrylic acid. n-butyl, (meth) acrylic acid i-butyl, (meth) acrylic acid t-butyl, (meth) acrylic acid alkyl ester such as 2-ethylhexyl, (meth) acrylic acid cyclohexyl, (meth) Methylcyclohexyl acrylate, (meth) acrylic acid bornyl, (meth) acrylic acid isobornyl, (meth) acrylic acid cycloalkyl esters such as adamantyl (meth) acrylate, phenyl (meth) acrylate, benzyl (meth) acrylate, etc. (Meth) acrylic acid aromatic ester, (meth) acrylic acid fluoropheny , (Meth) acrylic acid chlorophenyl, (meth) acrylic acid fluorobenzyl, (meth) acrylic acid substituted chlorobenzyl (meth) acrylic acid substituted aromatic ester, (meth) acrylic acid fluoromethyl, (meth) acrylic acid fluoroethyl (Meth) acrylic acid halogenated alkyl ester, (meth) acrylic acid hydroxyalkyl ester, (meth) acrylic acid glycidyl, (meth) acrylic acid ethylene glycol ester, (meth) acrylic acid polyethylene glycol ester, etc. it can.

Examples of the aromatic vinyl compound include α-substituted styrenes such as styrene, α-methyl styrene, α-ethyl styrene, and substituted styrenes such as fluorostyrene and methyl styrene.
Examples of the vinyl cyanide compound include acrylonitrile and methacrylonitrile.
Examples of the unsaturated dibasic acid or derivatives thereof include N-substituted maleimides such as N-methylmaleimide, N-ethylmaleimide, N-propylmaleimide, N-cyclohexylmaleimide, N-phenylmaleimide, N-chlorophenylmaleimide, Mention may be made of maleic acid, maleic anhydride, fumaric acid and the like.

Examples of the unsaturated fatty acid or derivative thereof include (meth) acrylamides such as (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, and calcium (meth) acrylate. , (Meth) acrylic acid barium, (meth) acrylic acid lead, (meth) acrylic acid tin, (meth) acrylic acid metal salt such as zinc acrylate, (meth) acrylic acid and the like. .
These vinyl monomers can be used by appropriately selecting one or more kinds as a constituent of the bead polymer.

The blending amount of the lubricant is preferably 18% by mass or less in the solid content of the paint.
The paint in the low friction region is preferably a paint obtained by mixing the beads with the wax.

  The lower limit of the average particle size of the beads is preferably 3 μm or more, more preferably 5 μm or more, and most preferably 7 μm or more. The upper limit of the average particle size is not particularly limited, but if the particle size is too large for gravure printing, it becomes difficult for beads to enter the eyes of the gravure plate, so the maximum is about 20 μm.

  When the label according to the present invention is used, the rise when attaching to the specially shaped container by shrinking can be suppressed to 3 mm or less, and the generation of wrinkles at the upper end can be suppressed. It is possible to obtain a label mounting container having an excellent appearance.

An embodiment in which the present invention is implemented will be specifically described. First, the raw materials used and the evaluation / measurement methods are shown below.
<Raw materials>
[Resin film]
Substrate A: manufactured by Toyobo Co., Ltd .: SC-821, a film made of longitudinal shrinkage polyethylene terephthalate, thickness = 18 μm, length in the main shrinkage direction: 235 mm, width: 160 mm.
-Base material B: Made by Phutamura Chemical Co., Ltd .: longitudinally shrinkable polyolefin film, thickness = 25 μm, length in main shrinkage direction: 235 mm, width 160 mm.

[Low friction paint]
-Coating agent a ... Sakata Inx Co., Ltd. product: Acrylic coating agent XGS-0513 Inner medium ROS, colorless and transparent paint, Coefficient of dynamic friction of coated surface ... 0.45.
・ Coating b: Sakata Inx Co., Ltd .: Urethane coating XGS-5804NT OP varnish, urethane coating, Fuji Silysia Chemical Co., Ltd .: Silicia 780 (silica particles, average particle size 11.0 μm) 0 Addition of 5% wt, colorless and transparent paint, dynamic friction coefficient of coated surface ... 0.40.
・ Coating agent c ... Dainichi Seika Kogyo Co., Ltd .: Acrylic coating OS-M medium, Fuji Silysia Chemical Co., Ltd .: Silicia 780 0.5% wt addition, colorless transparent paint, dynamic friction of coated surface Coefficient ... 0.35.

[High friction transparent paint]
-Coating agent d ... Sakata Inx Co., Ltd. product: Urethane coating agent XGS-5804NT OP varnish, urethane coating agent, colorless transparent paint, coefficient of dynamic friction of coated surface ... 0.55.
-Coating agent e ... Dainichi Seika Kogyo Co., Ltd .: Acrylic coating agent OS-M medium, colorless and transparent paint, Coefficient of dynamic friction of coated surface ... 0.65.

[White opaque paint (low friction)]
-Coating agent f ... Sakata Inx Co., Ltd. product: Urethane coating agent XGS-5804 N White NT ROS, Coefficient of friction of coated surface ... 0.45.
[White opaque paint (high friction)]
-Coating agent g ... Sakata Inx Co., Ltd. product: Urethane coating agent XGS-5804N White 130 Coefficient of dynamic friction of coated surface ... 0.60.

<Evaluation / Measurement>
[Dynamic friction coefficient]
In accordance with JIS K-7125, using a tensile tester (manufactured by Shimadzu Corporation: AG-I), in a 23 ° C., 50% RH environment, the coating surface, the base material surface, and Toyobo Ester (R) film E5102 The dynamic friction coefficient when a 12 μm non-corona surface was brought into contact was determined.

Example 1
The base material A was subjected to gravure printing so that the coating material a was 1.0 g / m ^{2 on} the entire surface above 3 mm from the lower end in the non-main shrinkage direction. As a result, a high friction region was formed with an area of 3 mm from the lower end portion as an uncoated portion, and the entire upper end portion was coated with a transparent paint to form a low friction region.
Next, this label is coated with hot melt BL-8801J manufactured by Toyo Adre Co., Ltd. with a width of 10 mm along the other side end surface of the label, and the label is wound around a mandrel so that the coating surface is on the inside. Was made into a cylindrical shape and covered with a bottle as shown in FIG.
Then, it was made to shrink by heating at 90 ° C. for 10 seconds in a steam type shrink tunnel, and attached to a bottle.
As a result of visually observing the state of the mounted product and measuring the height of the label rising from the bottom of the bottle, no wrinkle was generated on the label, and the label rising was 2 mm.

(Example 2)
Under the same conditions as in Example 1, except that the coating material a was applied to the substrate A over the entire surface above the position 5 mm from the lower end in the non-main shrinkage direction so as to be 1.0 g / m ^2. As a result of producing the cylindrical label and shrinking it to the bottle, no wrinkle was generated on the label, and the rising of the label was 1 mm.

(Example 3)
The coating material a is applied to the base material A so as to be 1.0 g / m ^{2 over} the entire surface above the position 3 mm from the lower end portion in the non-main contraction direction, and the coating material d is applied downward from the position of the lower end portion 3 mm. A cylindrical label was produced under the same conditions as in Example 1 except that gravure printing was performed on the entire surface so as to be 1.0 g / m ^2. As a result of shrinking the bottle, no wrinkles were generated on the label. The rising of the label was 2.5 mm.

Example 4
A cylindrical label was produced under the same conditions as in Example 1 except that the coating agent b was printed on the substrate A, and as a result of shrinking the bottle, there was no wrinkle on the bottle, and the rising of the label was 2 mm. Met.

(Example 5)
A cylindrical label was produced under the same conditions as in Example 1 except that the coating material c was printed on the base material B. As a result of shrinking the bottle, the bottle did not wrinkle, and the label was raised 2 mm. Met.

(Example 6)
Under the same conditions as in Example 1, except that the coating material a was applied to the base material A over the entire surface above the position of 1 mm from the lower end in the non-main shrinkage direction so as to be 1.0 g / m ^2. As a result of producing the cylindrical label and shrinking it to the bottle, no wrinkle was generated on the label, and the rising of the label was 3 mm.

(Comparative Example 1)
A cylindrical label was produced under the same conditions as in Example 1 except that the coating material d was printed on the base material A, and the bottle was shrunk. As a result, the label was wrinkled, and the rising of the label was 2 mm. .

(Comparative Example 2)
A cylindrical label was produced on the entire surface of the substrate A under the same conditions as in Example 1 except that the gravure printing was performed so that the coating material a was 1.0 g / m ^2, and shrinked to the bottle. That is, there is no high friction region. There was no generation of wrinkles on the label, and the rising of the label was 8 mm.

(Comparative Example 3)
The same as in Example 1 except that the coating material a was applied to the base material A over the entire surface above the position of 0.8 mm from the lower end in the non-main shrinkage direction so as to be 1.0 g / m ^2. As a result of producing a cylindrical label under the conditions and shrinking the bottle, wrinkles were not generated on the label, and the rising of the label was 6 mm.

(Comparative Example 4)
A cylindrical label was produced under the same conditions as in Example 1 except that the coating material e was printed on the base material B, and as a result of shrinking the bottle, wrinkles were generated on the bottle. there were.

(Reference Example 1)
The base material A was subjected to gravure printing so that the coating agent f was 3.0 g / m ^{2 on} the entire surface above the position 3 mm from the lower end in the non-main shrinkage direction. As a result, a high friction region was formed with an area of 3 mm from the lower end portion as an uncoated portion, and the entire upper end portion was coated with a transparent paint to form a low friction region.
Next, this label is coated with hot melt BL-8801J manufactured by Toyo Adre Co., Ltd. with a width of 10 mm along the other side end surface of the label, and the label is wound around a mandrel so that the coating surface is on the inside. Was made into a cylindrical shape and covered with a bottle as shown in FIG.
Then, it was made to shrink by heating at 90 ° C. for 10 seconds in a steam type shrink tunnel, and attached to a bottle.
As a result of visually observing the state of the mounted product and measuring the height of the label rising from the bottom of the bottle, no wrinkle was generated on the label, and the label rising was 2 mm.

(Reference Example 2)
A cylindrical label was produced under the same conditions as in Reference Example 1 except that the coating material g was printed on the substrate A, and as a result of shrinking the bottle, no wrinkle was generated on the label, and the rising of the label was 2 mm. there were.

11, 11a, 11b Label 12 Resin film 12a, 12b Side edge 13 Overlapping part 14 Print layer 15 Bottle 16 Adhesive layer 17 Mandrel

Claims (5)

In the heat shrinkable label made of a resin film that shrinks in the outer peripheral direction of the container due to heat and is fixed to the container,
The label has a low friction region at an upper portion and a high friction region at a lower end portion. The upper portion is a range from the lower end of the label to 10 mm or more and the upper end of the label, and the low friction region is provided in a range including at least a range of at least 10 mm from the upper end of the label,
The low friction region is formed by applying a paint having a dynamic friction coefficient (measured by JIS K7125 method) of 0.1 or more and 0.5 or less of the coating film obtained by coating. The heat-shrinkable label according to claim 1. The lower end is in a range of at least 1 mm from the lower end of the label;
The high-friction region is applied by applying a paint having a dynamic friction coefficient (measured by the JIS K7125 method) of 0.5 or more and 0.8 or less, which is obtained by coating, or uncoated. The heat-shrinkable label according to claim 1, wherein the heat-shrinkable label is formed.   The above-mentioned label is a label that is directly wrapped around the outer peripheral surface of the body of the container using a hot melt, or a label that is wrapped around a mandrel to form a cylindrical shape, and is then placed on the container. The heat-shrinkable label according to any one of claims 1 to 3. The label comprises a heat-shrinkable film that is at least uniaxially stretched,
The heat-shrinkable film is a polyolefin film, a polyester film, a polystyrene film, a polylactic acid film, a foamed polyolefin film, a foamed polyester film, a foamed polystyrene film, a foamed polylactic acid film, or these resins. The heat-shrinkable label according to any one of claims 1 to 4, wherein the heat-shrinkable label is a film made of a mixture or a laminated film of two or more layers of these films.

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