JP2009083877A - Cylindrical heat shrinkable label and plastic bottle with label - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylindrical heat shrinkable label improved so as to hold barrier properties. <P>SOLUTION: The cylindrical heat shrinkable label 3 is the cylindrical heat shrinkable label mounted on the outer periphery of a barrel part of a plastic bottle, and is equipped with a substrate film in which one end part margin 3a is put on the other end part margin 3b in the main shrinking direction 9, and the piled part is sealed at two positions such as a first seal part 2a near one end part and a second seal part 2b near the other end part. In a region between the first seal part 2a and the second seal part 2b of one end part margin 3a of the substrate film, a first perforation 1 is indented in the direction orthogonal to the main shrinking direction 9. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates generally to a cylindrical heat-shrinkable label, and more specifically, an improved cylindrical heat-shrinkable gas or light entering from a perforation so that the contents in the plastic bottle are not deteriorated or altered. Regarding sex labels. The present invention also relates to a labeled plastic bottle to which such a cylindrical heat-shrinkable label is attached.

  In recent years, plastic containers such as PET bottles are widely used as, for example, beverage containers because they are lighter and easier to handle than glass bottles and metal cans. On the other hand, plastic containers are easier to pass oxygen and carbon dioxide than glass bottles and metal cans, and the contents are easily deteriorated and altered. Further, many plastic containers are colorless and transparent, and the contents are easily deteriorated or deteriorated by sunlight or fluorescent light. For such a plastic container, it is possible to give the label a gas barrier property and a light shielding property to suppress the deterioration and alteration of the contents.

  Such cylindrical heat-shrinkable labels mounted on PET bottles are provided with perforations for cutting to facilitate the removal of the labels in order to facilitate recycling. However, since gas and light easily pass through this perforation, in order to prevent this, for example, as shown in FIG. A tubular heat-shrinkable label 3 that has been enveloped has been proposed by sufficiently taking the part 4 and overlaying it on the other end margin 3b and sealing it with the seal part 2 (for example, patents). Reference 1). The perforation 1 is provided at a position on one end margin 3 a of the label 3 that faces the inner debris portion 4.

  As shown in FIG. 5B, such a cylindrical heat-shrinkable label 3 is attached to the body of the PET bottle 5 and is heat-shrinked through a heating furnace so as to be in close contact with the body of the PET bottle 5. To do. Light or gas that enters from the perforation 1 and travels toward the inside of the PET bottle 5 is blocked by the inner debris part 4 and does not enter the PET bottle 5. As a result, it becomes possible to suppress the deterioration and alteration of the contents.

At the time of recycling, referring to FIG. 5 (C), the label 3 is cut along the perforation 1 by pinching the left and right portions of the upper end portion of the perforation 1 with a finger and pulling it. It can be easily peeled from the container.
JP 2005-350097 A

  However, in the conventional technique for providing the inner debris part 4, with reference to FIG. 6 (cross-sectional view taken along the line VI-VI in FIG. 5B), a recessed portion 6 such as a decompression panel is provided on the side surface of the PET bottle 5. In some cases, the inner debris portion 4 shrinks due to thermal contraction at the hollow portion 6 and rolls up as shown in the figure, losing barrier properties, and light / gas entering from the perforation 1 is inside the PET bottle 5. There was a problem that the content 7 deteriorated and deteriorated.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a cylindrical heat-shrinkable label that is improved so as to be able to maintain barrier properties.

  Another object of the present invention is to provide a plastic bottle formed by mounting such a cylindrical heat-shrinkable label.

  The cylindrical heat-shrinkable label according to the present invention is a cylindrical heat-shrinkable label attached to the outer periphery of the body of the container, and overlaps one end margin in the main shrinkage direction on the other end margin. In addition, the overlapping portion includes a base film that is sealed at two locations, the first seal portion near the one end portion and the second seal portion near the other end portion. A first perforation is engraved in a direction perpendicular to the main contraction direction in a region between the first seal portion and the second seal portion of the one end margin of the base film. .

  According to this invention, even if the other end margin of the label in the region between the first seal portion and the second seal portion contracts due to thermal contraction, the first seal portion and the second seal portion Because it is fixed, it does not roll up.

  According to a preferred embodiment of the present invention, the adhesive strength of the second seal portion is set to be equal to or lower than the adhesive strength of the first seal portion. That is, the relationship of the adhesive strength of the second seal portion ≦ the adhesive strength of the first seal portion is established.

  According to a preferred embodiment of the present invention, the other end of the base film is formed such that the first perforation is applied to the outside of the overlapping portion of both end portions, and the second perforation is applied to the inside. A second perforation is engraved in a direction perpendicular to the main contraction direction in a region between the first seal portion and the second seal portion. The position where the first perforation is carved and the position where the second perforation are carved are shifted from each other in the main contraction direction.

  A printed layer serving as a display is formed from the back surface of the other end margin of the base film to the one end margin, leaving the back surface of the one end margin.

  The dimension of the overlapping portion is preferably 20 mm to 50 mm in the main contraction direction.

  The base film is formed of a material that blocks transmission of light or gas. For example, a UV-cut film with a UV absorber (transparent), a pigment such as titanium oxide, a light blocking film with microvoids formed (opaque), a saponified ethylene-vinyl acetate copolymer, etc. The gas barrier film made is preferably used.

  The first and second seal portions are sealed by dissolving the surface of the film with a solvent. Solvents include alkane solvents such as n-butane, n-pentane, n-hexane, n-heptane, n-octane, cyclohexane and methylcyclohexane, aromatic hydrocarbons such as benzene, toluene, naphthalene and o-xylene, furan Ether solvents such as epichlorohydrin, tetrahydrofuran, 1,3-dioxolane, 1,4-dioxane, dimethyl ether, diethyl ether, ketone solvents such as acetone, methyl ethyl ketone, cyclohexanone, diethyl ketone, methyl acetate, ethyl acetate, n-acetic acid Examples include ester solvents such as butyl, and alcohol solvents such as methanol, ethanol, allyl alcohol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, benzyl alcohol, and cyclohexanol. These may be used alone or in combination with a plurality of solvents.

  The cylindrical heat-shrinkable label is attached to a plastic bottle and heat-shrinked. A depression portion such as a decompression panel may be formed on the surface of the plastic body.

  According to the present invention, the region where the two base film overlaps between the first seal portion and the second seal portion is fixed by the first seal portion and the second seal portion. The heat shrink process does not cause any deviation. Light or gas entering from the first perforation is blocked by an inner label facing the first perforation.

  The purpose of obtaining a cylindrical heat-shrinkable label that has been improved so that the barrier property can be maintained even when heat-shrinking processing is carried out when the plastic bottle is attached is the margin of one end in the main shrinkage direction. On the other end margin, and the overlapping portion is sealed at two locations, the first seal portion near the one end portion and the second seal portion near the other end portion. It was realized.

  Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, the same parts are denoted by the same reference numerals.

  1 is a perspective view of a cylindrical heat-shrinkable label according to Example 1. FIG. 2 is a cross-sectional view taken along line II-II in FIG. In the cross-sectional view of FIG. 2, the layers are drawn apart for convenience of drawing, but these are in close contact. The same applies to the examples described later.

  With reference to these drawings, the cylindrical heat-shrinkable label 3 according to Example 1 has one end margin 3a in the main contraction direction 9 superimposed on the other end margin 3b, and the overlap. The part is sealed at two locations, the first seal part 2a near one end and the second seal part 2b near the other end, formed at positions separated from each other in the main contraction direction 9. A base film with an envelope is provided. Both the first seal portion 2 a and the second seal portion 2 b are provided so as to extend in a direction orthogonal to the main contraction direction 9. The base film is formed of a material that blocks transmission of light or gas. A printed layer 8 is formed on the back surface of the base film except for the back surface of one end margin 3a of the base film. The first seal portion 2a and the second seal portion 2b are formed on the back surface (the inner side of the cylindrical heat-shrinkable label), and then the first seal portion 2a on the back surface of one end margin 3a It is formed by applying a sealing solvent to a portion to be the second seal portion 2b, and then overlapping and crimping one end margin 3a and the other end margin 3b.

  In the present embodiment, the case where printing is not performed on the back surface of one end margin 3a is illustrated, but the present invention is not limited to this, and the first end margin 3a is not limited to the first end margin 3a. A mode in which printing is performed between the seal portion 2a and the second seal portion 2b (excluding the seal portion) is also included.

  A perforation 1 is inscribed in a direction perpendicular to the main contraction direction 9 in a region between the first seal portion 2a and the second seal portion 2b of one end margin 3a of the base film.

  The first seal portion 2a is provided along the edge of the one end margin 3a of the base film, and the second seal portion 2b is provided along the edge of the other end margin 3b of the base film. It has been. The adhesive strength of the second seal portion 2b is set to be lower than the adhesive strength of the first seal portion 2a. That is, the relationship of the adhesive strength of the second seal portion ≦ the adhesive strength of the first seal portion is established.

  If the adhesive strength is 2.0 N / 10 mm or more, there is no problem in actual use. If the adhesive strength is 2.0 to 4.0 N / 10 mm, it can be peeled off by hand. If it exceeds 4.0 N / 10 mm, it will be difficult to peel it off by hand. Therefore, the adhesive strength of the first seal portion is adjusted to 2.0 to 10.0 N / 10 mm, and the adhesive strength of the second seal portion is adjusted to 2.0 to 4.0 N / 10 mm. The adhesive strength is adjusted by adding a solvent that does not dissolve the base film to the solvent that dissolves the base film to adjust the solubility, or by reducing the coating amount of the solvent.

  In the main contraction direction 9, the dimension of the overlapping portion is 20 mm to 50 mm.

  With reference to FIG. 3 (A), the cylindrical heat-shrinkable label 3 is attached to the body of the PET bottle 5, passed through a heating furnace and thermally contracted, and is in close contact with the outer periphery of the body of the PET bottle 5. FIG. 3B is a cross-sectional view taken along line BB in FIG. According to the present embodiment, the other end margin 3b of the label in the region between the first seal portion 2a and the second seal portion 2b is fixed by the first seal portion 2a and the second seal portion 2b. ing. For example, even if the other end margin 3b of the label is present in the depression of the decompression panel or the like of the PET bottle, only the other end margin is not significantly contracted and contracted due to the thermal contraction process. The light / gas entering from the perforation 1 is blocked by the other end margin 3b of the label, does not enter the inside of the PET bottle 5, and does not cause deterioration or alteration of the contents 7.

  When the label is peeled from the bottle, the label 3 is cut along the perforation 1 by pinching the left and right portions of the upper end portion of the perforation 1 with fingers. Thereafter, by pulling the second seal portion 2b side of the one end margin 3a in the main contraction direction of the label 3, the second seal portion 2b is peeled off, and the label 3 can be easily peeled from the plastic bottle.

  In the said Example 1, the adhesive strength of a 1st seal part is adjusted to 2.0-10.0N / 10mm, and the adhesive strength of a 2nd seal part is adjusted to 2.0-4.0N / 10mm. Although the case has been illustrated, the present invention is not limited to this. This embodiment can also be applied when both the first seal part and the second seal part exceed 4.0 N / 10 mm.

  4A is a perspective view of the cylindrical heat-shrinkable label according to Example 2, and FIG. 4B is a cross-sectional view taken along the line BB. The difference from Example 1 is that the adhesive strength of the second seal portion 2b is not weakened, and the region between the first seal portion 2a and the second seal portion 2b of the other end margin 3b of the label. In addition, the second perforation 1b is inscribed in a direction orthogonal to the main contraction direction 9. The position where the first perforation 1a is carved and the position where the second perforation 1b is carved are shifted from each other in the main contraction direction 9.

  Referring to FIG. 4C, according to the present embodiment, even if the other end margin 3b in the region between the first seal portion 2a and the second seal portion 2b contracts due to thermal contraction, It is fixed by the 1 seal part 2a and the 2nd seal part 2b. Further, since the position where the first perforation 1a is engraved and the position where the second perforation 1b is engraved are shifted from each other in the main contraction direction 9, the light perforated from the first perforation 1a The gas is blocked by the other end margin 3 b of the label and does not reach the inside of the PET bottle 5.

  When the label is peeled from the bottle, one end margin 3a of the label is moved along the first perforation 1a by pinching the left and right portions of the upper end of the first perforation 1a with fingers. Disconnected. After that, by pinching the left or right part of the upper end of the second perforation 1b with a finger and pulling, the other end margin 3b of the label is cut along the second perforation 1b. It can be easily peeled from the PET bottle 5.

  It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The cylindrical heat-shrinkable label according to the present invention can be easily peeled off from a plastic bottle and has excellent barrier properties.

It is a perspective view of the cylindrical heat-shrinkable label which concerns on Example 1. FIG. FIG. 2 is a conceptual cross-sectional view taken along line II-II in FIG. 1. (A) It is a perspective view when the cylindrical heat-shrinkable label which concerns on Example 1 is mounted | worn with the PET bottle. (B) It is sectional drawing which follows the BB line in FIG. 3 (A). (A) It is a perspective view of the cylindrical heat-shrinkable label which concerns on Example 2. FIG. (B) It is a conceptual sectional view which meets a BB line in Drawing 4 (A). (C) It is a notional sectional view of a trunk part when a cylindrical heat-shrinkable label concerning Example 2 is attached to a PET bottle. (A) It is a perspective view of the conventional cylindrical heat-shrinkable label. (B) It is a perspective view of the PET bottle equipped with the conventional cylindrical heat-shrinkable label. (C) It is the figure which showed a mode that a heat-shrinkable label was peeled from a PET bottle with a perforation. It is sectional drawing of the trunk | drum which shows the problem of the PET bottle equipped with the conventional cylindrical heat-shrinkable label.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Perforation 1a 1st perforation 1b 2nd perforation 2 Seal part 2a 1st seal part 2b 2nd seal part 3 Cylindrical heat-shrinkable label 3a One end margin 3b The other end margin 4 Inner part 5 PET bottle 6 Indentation 7 Contents 8 Printing layer 9 Main shrinkage direction

Claims (8)

A cylindrical heat-shrinkable label attached to the outer periphery of the body of the container,
One end margin in the main contraction direction is overlaid on the other end margin, and the overlapping portion is a first seal portion near the one end portion and a second seal near the other end portion. A base film sealed at two locations of the part,
A first perforation is engraved in a direction perpendicular to the main contraction direction in a region between the first seal portion and the second seal portion of the one end margin of the base film. , Tubular heat shrinkable label.   The cylindrical heat-shrinkable label according to claim 1, wherein an adhesive strength of the second seal portion is set to be equal to or lower than an adhesive strength of the first seal portion. The first seal portion at the other end margin of the base film so that the first perforation is applied to the outside of the overlapping portion of both end portions and the second perforation is applied to the inside. The second perforation is engraved in a direction perpendicular to the main contraction direction in a region between the first seal portion and the second seal portion;
The cylindrical heat-shrinkable label according to claim 1, wherein a position where the first perforation is carved and a position where the second perforation are carved are shifted from each other in the main shrinkage direction.   The printed layer is formed from the back surface of the other end margin of the base film to the one end margin, leaving the back surface of the one end margin. The cylindrical heat-shrinkable label according to item.   The cylindrical heat-shrinkable label according to any one of claims 1 to 4, wherein a dimension of the overlapping portion is 20 mm to 50 mm in the main shrinkage direction.   The said base film is a cylindrical heat-shrinkable label of any one of Claim 1 to 5 formed with the material which interrupts | blocks permeation | transmission of light or gas.   The cylindrical heat-shrinkable label according to any one of claims 1 to 6, wherein the first and second sealing portions are sealed with a solvent.   A plastic bottle with a label formed by heat-shrinking the cylindrical heat-shrinkable label according to claim 1 to a plastic bottle.