JP2012234064A - Label with projections and package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a label with projections which hardly drop off.SOLUTION: A label 1 with projections of the present invention includes a base material 21 and projections 3 arranged in a protruded manner on a surface of the base material 21. The projections 3 are formed of hot-melt adhesive attached to the surface of the base material 21 and solidified. Adherent improvement treatment is applied, at least on the surface of the base material 21 attached with the hot-melt adhesive, for improving adhesive strength of the hot-melt adhesive.

Description

  The present invention relates to a label with a protrusion provided with a protrusion and a package.

Conventionally, labels in which convex portions are formed on the surface using ink are known (Patent Documents 1 and 2).
Such a convex part can function as Braille or can function as a slipper.
However, when ink is used, a sufficiently high convex portion cannot be formed.

On the other hand, in Patent Document 3, a hot melt adhesive containing polyethylene, polyvinyl acetate, polyamide or hydrocarbon resin is spot-attached and solidified on the surface of a base material made of a propylene film or a styrene film. It is disclosed to form Braille (protrusion).
If a hot melt adhesive is used, it is considered that Braille with relatively high height can be easily formed on the surface of the substrate.

However, when the hot melt adhesive is simply adhered and solidified on the substrate, there is a problem that the protrusion (that is, the hot melt adhesive after solidification) drops off during distribution or use. If some protrusions fall off, they no longer function as braille.
Moreover, when a base material has heat shrinkability, a base material may shrink | contract partially by adhesion of the heated (melted) hot-melt-adhesive, and the deform | transformed label may be obtained.

Utility Model Registration No. 3007557 Japanese Patent Laid-Open No. 2004-205768 Japanese National Patent Publication No. 11-509643

A first object of the present invention is to provide a label with a projection that prevents the projection from dropping off.
The second object of the present invention is to provide a label with a protrusion in which the protrusion is unlikely to fall off, and further, deformation due to the provision of the protrusion is suppressed.

  The label with protrusions of the present invention has a base material and a protrusion part protruding from the surface of the base material, and the protrusion part is attached to the surface of the base material and solidified. An adhesion improving process for increasing the adhesion strength of the hot melt adhesive is performed on at least the surface of the base material to which the hot melt adhesive is adhered.

In a preferable label with protrusions of the present invention, the surface of the base material is roughened as the adhesion improving treatment.
In a preferable label with protrusions of the present invention, the substrate has heat shrinkability, and an overcoat layer containing a curable resin is formed on the surface of the substrate as the adhesion improving treatment.

According to another situation of this invention, the package provided with the said label with a protrusion is provided.
The package includes an adherend having an outermost diameter portion and a reduced diameter portion positioned on an inner side of an outer surface of the outermost diameter portion, and any one of the labels with protrusions, and the protrusion portion includes The protrusion-attached label is attached to the adherend so as to correspond to the reduced diameter portion of the adherend.

The protruding label of the present invention can prevent the protruding portion from dropping off during distribution or use.
In addition to the above effects, the preferred label with protrusions of the present invention does not cause deformation such as wrinkles and has a beautiful appearance similar to that of a normal label.

The perspective view of the label with a protrusion concerning one embodiment of the present invention. The II-II line expanded sectional view of FIG. The top view of the label with a protrusion concerning other embodiments of the present invention. The IV-IV line expanded sectional view of FIG. The top view of the label with a protrusion which concerns on other embodiment of this invention. The VI-VI line expanded sectional view of FIG. The front view including the partial cross section which shows one Embodiment of the package which mounted | wore the container with the label with a protrusion of this invention. The front view including the partial cross section which shows other embodiment of the package which mounted | wore the container with the label with a protrusion of this invention.

  The label with protrusions of the present invention includes a base material having flexibility (softness) and a protrusion portion protruding from at least the surface of the substrate, and the protrusion portion is solidified. Formed from.

  Generally, labels are roughly classified into tack labels, heat-shrinkable cylindrical labels, self-expandable cylindrical labels, wrapping labels, and heat-shrinkable wrapping labels. it can.

A tack label is a label in which a pressure-sensitive adhesive (or adhesive) is provided on the back surface of a substrate, and is attached to an adherend via the pressure-sensitive adhesive (or adhesive).
A heat-shrinkable cylindrical label has a heat-shrinkable base material, and is formed into a cylindrical shape by overlaying and bonding the back surface of the other-side end portion to the surface of the one-side end portion of the base material. Label. The heat-shrinkable cylindrical label is a label that is attached to the adherend by being externally fitted to the adherend and heating. A heat-shrinkable cylindrical label is also called a cylindrical shrink or a shrink label.

  A self-stretching cylindrical label has a base material having self-stretchability, and is formed into a cylindrical shape by overlaying and bonding the back surface of the other side end part to the surface of one side end part of the base material. Label. The self-expandable cylindrical label is a label that is attached to the adherend by externally fitting the adherend in a state where the diameter is increased by applying a force in the radially outward direction, and then releasing the force. . Self-stretching cylindrical labels are also called stretch labels.

The winding label is formed by adhering the back surface of one end of the base material to the adherend, winding the base material around the adherend, and placing the other end of the base material on the surface of the one end. It is a label formed into a cylindrical shape by overlapping the back surface and adhering (or adhering the other side end part to the one side end part without being overlapped a little apart).
The heat-shrinkable winding label is a winding label using a base material having heat-shrinkability. Like the winding label, the heat-shrinkable winding label is wound around the adherend to form a cylinder, and then heated to adhere to the adherend. It is a label to be closely attached to.

The tack label, the heat-shrinkable cylindrical label, the self-expandable cylindrical label, the winding label, and the heat-shrinkable winding label are common in that the base material is the main component, and the present invention. Can be applied to any of these labels.
However, the label with projections of the present invention is not limited to these four types of labels, and can be used as, for example, an in-mold label.

FIG.1 and FIG.2 has shown the case where the label with a protrusion of this invention is applied to the heat-shrinkable cylindrical label.
This heat-shrinkable cylindrical label 11 with projections (label 1 with projections) has a base material 21 having heat-shrinkability, and a protruding portion 3 protruding from at least the surface of the base material 21. The base material 21 is formed in a cylindrical shape with the surface of the base material 21 facing outside, and both side end portions 21 a and 21 b of the base material 21 are bonded.

  The base material 21 having the heat shrinkability is thermally contracted in a predetermined direction when heated to a predetermined temperature (for example, 60 ° C. to 120 ° C.). In addition, the base material 21 is preferably one that does not melt with the heat of the hot melt adhesive and has heat resistance.

The base material 21 having heat shrinkability is not particularly limited. For example, styrene resin such as polystyrene; polyester resin such as polyethylene terephthalate and polylactic acid; olefin resin such as polypropylene and cyclic olefin; polycarbonate; A thermoplastic resin film containing one or a mixture of two or more selected from thermoplastic resins such as resins can be used. Since the hot melt adhesive described later is easily adhered, it is preferable to use a polyester film or a polyolefin film as the substrate 21. Moreover, as the heat-shrinkable base material 21, a laminated film in which two or more kinds of thermoplastic resin films are laminated, or a laminated film in which a metal vapor deposition film is laminated can also be used. These films can be provided with heat-shrinkability by forming and stretching the film by a known production method.
The thickness of the thermoplastic resin film or laminated film is, for example, about 30 μm to 120 μm.

Furthermore, as the heat-shrinkable substrate 21, a laminated film in which a heat insulating layer such as a nonwoven fabric or a foamed resin sheet is laminated on the thermoplastic resin film can also be used.
When the substrate 21 is the laminated film, the film on the surface side of the substrate (that is, the side to which the hot melt adhesive is attached) is preferably a polyester film or a polyolefin film, These uniaxial or biaxially stretched films are more preferable, and biaxially stretched films are particularly preferable.

Examples of the polyester film include an aromatic polyester film and an aliphatic polyester film.
The aromatic polyester film is preferably a polyethylene terephthalate film having terephthalic acid as a main component as a dicarboxylic acid component and ethylene glycol as a diol component as a main component. In particular, the diol component is modified with 1,4-cyclohexanedimethanol. A polyethylene terephthalate film obtained by modifying a polyethylene terephthalate film, a diol component modified with neopentyl glycol, or a dicarboxylic acid component modified with adipic acid is more preferred.
The aliphatic polyester film is preferably a polylactic acid film containing polylactic acid as a main component.
As a polyolefin-type film, the cyclic polyolefin-type film which has cyclic polyolefin as a main component, and the polypropylene-type film which has polypropylene as a main component are preferable.

The heat-shrinkable base material 21 can heat-shrink at least in the horizontal direction (the horizontal direction corresponds to the circumferential direction when formed in a cylindrical shape) at a heat-shrink temperature (for example, 60 ° C. to 120 ° C.). A film is used, and if necessary, a film that can be slightly heat-shrinked in the longitudinal direction may also be used.
As for the heat shrinkage rate of the base material 21, for example, the heat shrinkage rate in the transverse direction when heated to 85 ° C. is preferably 30% or more, more preferably 40% or more, and particularly preferably 50% or more.
Thermal shrinkage rate (%) = [{(original length of base material 21 in the horizontal direction) − (length of base material 21 after immersion in the horizontal direction)} / (original length of base material 21 in the horizontal direction) ]) × 100.

The surface of the substrate 21 is subjected to an adhesion improving process for increasing the adhesion strength of the hot melt adhesive.
The adhesion improving process may be performed on substantially the entire surface of the base material 21, or may be performed on one part or a plurality of parts of the base material 21. But when the said adhesive improvement process is given to one part or several parts of the base material 21, the process is given to the part to which a hot-melt-adhesive agent adheres at least. In other words, the hot melt adhesive is adhered on the treated surface on which the adhesion improving process has been performed, so that the protrusions 3 are formed.

The adhesion improving treatment is not particularly limited as long as the hot melt adhesive adhered to the treated surface can adhere more strongly than when directly adhered to the surface of the substrate 21.
Specifically, the adhesion improving process includes a process of applying an overcoat agent to the surface of the substrate 21, a process of roughening the surface of the substrate 21, and a polymer that forms the surface of the substrate 21 with a polar group. And the like. These treatments may be performed singly or in combination of two or more (for example, after applying a polar group to the surface of the base material 21, an overcoat agent is applied to the surface. Such as forming an overcoat layer).
Among these, since the hot melt adhesive adheres more firmly, it is preferable to apply the overcoat agent or roughen the surface of the substrate 21, and further attach the molten hot melt adhesive. Since the thermal shrinkage of the base material 21 can be suppressed when it is applied, a treatment for applying an overcoat agent is more preferable.

By performing the process of applying the overcoat agent, an overcoat layer is formed on the surface of the substrate 21. In each figure, the overcoat layer is not shown.
By providing the overcoat layer corresponding to at least the portion to which the hot melt adhesive is attached, it is possible to suppress the heat of the hot melt adhesive from being transmitted to the base material 21. For this reason, when the melted hot melt adhesive is adhered to the surface of the overcoat layer, the heat-shrinkable base material 21 can be prevented from shrinking.
The thickness of the overcoat layer is not particularly limited, but is preferably 1 μm to 10 μm, more preferably 2 μm to 5 μm, in order to sufficiently achieve the above-described heat shielding.

Examples of the overcoat agent include a solvent volatile coating agent containing a solvent and a resin component, and a curable coating agent containing a curable resin that cures under predetermined conditions. The overcoat layer is preferably formed of a curable coating agent containing a curable resin because a layer that is relatively difficult to deform even when heat is applied can be formed.
As a coating method of the coating agent, various printing methods such as a gravure printing method, a flexographic printing method, a letterpress printing method, and a letterpress rotary printing method are simple.

Examples of the curable coating agent containing the curable resin include an ionizing radiation curable resin such as an ultraviolet curable resin, a thermosetting resin, a two-component curable resin, or a mixture of an ionizing radiation curable resin and a thermosetting resin. Examples of the coating agent include:
Since an overcoat layer can be formed with almost no heat applied to the substrate 21, a coating agent containing an ionizing radiation curable resin is preferable, and since it is also general-purpose, a coating agent containing an ultraviolet curable resin is preferable. More preferred.

An ionizing radiation curable resin is a mixture of prepolymers (including oligomers) and / or monomers having a polymerizable unsaturated bond or cationic polymerizable functional group in the molecule, and can be cured by ionizing radiation. A composition.
Examples of the ionizing radiation curable resin include epoxy acrylate, urethane acrylate, polyester acrylate, polyfunctional acrylate, polyether acrylate, silicone acrylate, polybutadiene acrylate, unsaturated polyester / styrene, polyene / thiol, polystyryl methacrylate, and the like. A copolymer or a mixture of two or more of these may be used.

  Examples of thermosetting resins include epoxy resins, xylene resins, diallyl phthalate resins, urethane resins, vinyl ester resins, unsaturated polyesters, imide resins, melamine resins, maleic resins, acrylic resins, silicon resins, alkyd resins, Or the mixture of these 2 or more types is mentioned.

  Examples of the two-component curable resin include two-component materials such as a polyol compound and an isocyanate compound, an epoxy compound and an amine compound, or an acrylic resin and a melamine resin.

As the roughening treatment, the surface of the substrate 21 is ground using an abrasive such as a polishing cloth or sandblast, and the surface of the substrate 21 is corona discharge treatment, plasma discharge treatment or flame treatment. And so on.
Examples of the treatment for imparting a polar group include performing a corona discharge treatment, a plasma discharge treatment, an ultraviolet irradiation treatment, or an alkali treatment on the surface of the substrate 21.

Since the surface of the substrate 21 can be roughened and polar groups can be introduced into the surface, at least one of corona discharge treatment and plasma discharge treatment is preferred, and corona discharge treatment is more preferred.
The corona discharge treatment is performed by passing the base material 21 into the corona discharge. The plasma discharge treatment is performed by passing the base material 21 into the low temperature plasma.

The protrusion 3 made of the solidified hot melt adhesive is formed by partially adhering and solidifying the hot melt adhesive on the surface of the base material 21 that has been subjected to the adhesion improving process.
When the adhesion improving process is a process of applying a coating agent containing a curable resin to the surface of the base material 21, the hot melt adhesive is an overcoat layer laminated on the surface of the base material 21. Adhere to the surface.
When the adhesion improving process is a process of roughening the surface of the substrate 21 or imparting a polar group to the surface, the hot melt adhesive is directly adhered onto the surface of the substrate 21.

  The hot melt adhesive is an adhesive that is solid at room temperature and can be attached to the substrate 21 by heat melting. The hot melt adhesive can be spot-attached to the surface of the base material 21 by using, for example, a known hot melt gun, an apparatus disclosed in the above-mentioned Patent Document 3 (Japanese Translation of PCT International Publication No. 11-509634). .

  As the hot melt adhesive, generally known hot melt adhesives can be used. Specifically, for example, olefin polymer; urethane polymer; ester polymer; silicone polymer; ethylene-vinyl acetate copolymer, ethylene- (meth) acrylic ester copolymer, ethylene-acrylic acid Copolymer, ethylene copolymer such as ethylene-methacrylic acid copolymer; styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene- Styrene polymers such as butylene-styrene-block copolymer (SEBS) and styrene-ethylene-propylene-styrene block copolymer (SEPS); olefin elastomers such as ethylene-α olefins, ester elastomers, amide elastomers, etc. Thermoplastic Elastomer; base polymer, such as a main component, a hot melt adhesive containing these singly or two or more thereof. These hot melt adhesives can be used alone or in combination of two or more. Among these, a hot melt adhesive containing at least one of an olefin polymer such as a thermoplastic hydrocarbon resin and a urethane polymer such as a urethane prepolymer as a base polymer is preferable.

  Specific examples of the hot melt adhesive containing the olefin polymer as a base polymer include, for example, hot melt adhesives disclosed in JP-T-2010-501691, etc., and the urethane polymer as a base polymer. Specific examples of the hot melt adhesive to be included include hot melt adhesives disclosed in, for example, Japanese Unexamined Patent Application Publication Nos. 2009-286951 and 2010-275409.

The softening point of the olefin polymer hot melt adhesive is not particularly limited, but is usually 70 ° C to 140 ° C, preferably 80 ° C to 120 ° C. The viscosity is not particularly limited, but the viscosity at 160 ° C. is usually 100 to 4,000 mPa · s, preferably 150 to 3,000 mPa · s.
The viscosity of the urethane polymer hot melt adhesive is not particularly limited, but the viscosity at 120 ° C. is usually 500 to 12,000 mPa · s, preferably 700 to 10,000 mPa · s.

Although only one protrusion 3 may be provided, a plurality of protrusions 3 are usually provided.
The protrusion 3 can function as, for example, a braille for a visually handicapped person to read by tactile sense, a three-dimensional design, or a catching portion for preventing slipping when the label is held by hand.
For example, when the protrusions 3 function as braille, the plurality of protrusions 3 protrude from the surface of the base material 21 so as to represent predetermined characters in accordance with a Braille type or the like. The label 11 with protrusions in the illustrated example is a case where the protrusions 3 function as braille.

The protrusion 3 may be provided at any location on the heat-shrinkable cylindrical label 11.
The planar view shape of one protrusion 3 is not particularly limited, and is, for example, a substantially circular shape (including an oval shape) in plan view, a substantially rectangular shape in plan view, an elongated linear shape (including straight lines or arbitrary meander lines), and the like. Is mentioned. When used as braille, the protrusion 3 is generally circular in plan view. The planar view shape refers to a shape viewed from the normal direction with respect to the surface of the base material 21.
The size of one protrusion 3 is set as appropriate, but taking the case of the protrusion 3 having a substantially circular shape in plan view as an example, the diameter is about 0.5 mm to 3 mm.

  The protrusion height of one protrusion 3 is not particularly limited. However, when the protrusion height of the protrusion 3 is too low, the braille function, the three-dimensional design function, or the hooking function cannot be sufficiently exhibited. When the protruding height of the protruding portion 3 is too high, the presence of the protruding portion 3 may cause problems due to overuse of the label. From such a point, the protrusion height of the protrusion 3 is preferably about 0.2 mm to 3 mm. The protruding height of the protruding portion 3 is the height from the surface of the base material 21 to the highest point of the protruding portion 3.

  The protrusion 3 may be formed on the base material 21 at any time before the base material 21 is formed into a cylindrical shape or after the base material 21 is formed into a cylindrical shape.

The heat-shrinkable cylindrical label 11 with protrusions of the present invention can be attached to the adherend by heating after being externally fitted to the adherend, similarly to the conventionally known heat-shrinkable cylindrical label.
The heat-shrinkable cylindrical label 11 (label 1 with protrusions) of the present invention does not easily drop off the protrusion 3 even if the base material 21 is twisted or a foreign object contacts during distribution or use. A set of a plurality of protrusions 3 functioning as braille cannot fully exhibit the function of braille even if some of the protrusions 3 drop off, but according to the present invention, such a situation is unlikely to occur.
Since the preferable heat-shrinkable cylindrical label 11 (label 1 with protrusions) of the present invention can suppress the shrinkage of the heat-shrinkable base material 21 when a hot melt adhesive is attached, deformation such as wrinkles occurs. It has a beautiful appearance without any problems.

When the label 1 with protrusions of the present invention is applied to a self-expandable cylindrical label, a self-stretchable base material is used instead of the base material 21 described in the heat-shrinkable cylindrical label 11 with protrusions. Used.
The self-stretching base material is not particularly limited, and for example, a low density polyethylene film, a linear low density polyethylene film, an ethylene-vinyl acetate copolymer film, and the like are preferable.

3 and 4 show a case where the protruding label 1 of the present invention is applied to a wound label.
The winding label 12 with protrusions (label 1 with protrusions) includes a base material 22 and a protruding portion 3 protruding from at least the surface of the base material 22.

The base material 22 may or may not have heat shrinkability or self-stretchability.
As the base material 22 having heat shrinkability or self-stretchability, those described above can be used.
Examples of the base material 22 that does not have heat shrinkability and self-stretchability include thermoplastic resin films, paper, and synthetic paper. The thermoplastic resin film (same for synthetic paper) is preferably a polyester-based or polyolefin-based film, more preferably a heat-fixed uniaxially or biaxially stretched film, and a heat-fixed biaxially stretched film. Is particularly preferred.
For example, as shown in the drawing, the base material 22 is formed in a substantially rectangular shape in plan view, and its lateral length is slightly longer or slightly shorter than the circumference of the adherend or the same as the circumference of the adherend. It is said that.

The surface of the base material 22 is subjected to the above-described adhesion improving process, and the protrusion 3 that is a solidified product of the hot melt adhesive is formed on the processed surface.
On the back surface of the base material 22, an adhesive layer 42 for attaching the wound label 12 with protrusions to the adherend is provided.

The adhesive layer 42 can be formed by applying a pressure-sensitive adhesive or an adhesive to the back surface of the substrate 22. In addition, in FIG. 4, although the case where the adhesive agent layer 42 is provided in the solid form on the whole back surface of the base material 22 is illustrated, the adhesive agent layer 42 is partially on the back surface of the base material 22 ( For example, it may be provided only on the back surface of the both end portions of the base material 22.
Examples of the pressure-sensitive adhesive or adhesive forming the adhesive layer 42 include conventionally known pressure-sensitive pressure-sensitive adhesives, heat-sensitive pressure-sensitive adhesives, heat-sensitive adhesives, and water-based adhesives, but heat-sensitive pressure-sensitive adhesives or heat-sensitive adhesives. It is preferable to use an agent.
As shown in FIG. 3, the winding label 12 with protrusions in which a plurality of protrusions 3 are arranged in parallel in the entire lateral direction of the base material 22 is attached to the periphery of the adherend so that the slip is prevented. Can function as a label.

By using a material having heat shrinkability in the winding direction (circumferential direction) as the substrate 22, a heat shrinkable winding label with protrusions can be configured.
As the base material having heat shrinkability, those described for the heat-shrinkable cylindrical label 11 with protrusions can be used.

4 and 5 show a case where the protruding label 1 of the present invention is applied to a tack label.
The tuck label 13 with protrusions (label 1 with protrusions) includes a base material 23 and a protruding portion 3 protruding from at least the surface of the base material 23.

The base material 23 may or may not have heat shrinkability or self-stretchability.
As the base material 23 having heat shrinkability or self-stretchability, those described above can be used.
Examples of the base material 23 that does not have heat shrinkability and self-stretchability include thermoplastic resin films, paper, and synthetic paper. The thermoplastic resin film (same for synthetic paper) is preferably a polyester-based or polyolefin-based film, more preferably a heat-fixed uniaxially or biaxially stretched film, and a heat-fixed biaxially stretched film. Is particularly preferred.
The planar view shape of the base material 23 can be designed as appropriate. Typically, as illustrated, it is formed in a substantially square shape or a substantially rectangular shape in plan view.

The surface of the base material 23 is subjected to the above-described adhesion improving process, and the protrusion 3 that is a solidified product of the hot melt adhesive is formed on the processed surface.
On the back surface of the base material 23, an adhesive layer 43 for attaching the tuck label 13 with protrusions to the adherend is provided.

The pressure-sensitive adhesive layer 43 can be formed by applying a pressure-sensitive adhesive to the back surface of the substrate 23.
Examples of the pressure-sensitive adhesive include conventionally known pressure-sensitive pressure-sensitive adhesives and heat-sensitive pressure-sensitive adhesives.

The label with protrusions 1 of the present invention is used by being attached to an adherend such as a bottle-type container for beverages or an eye drop container.
FIG. 7 shows a package 9 in which the heat-shrinkable cylindrical label 11 with protrusions is heat-shrink mounted on the container 5.
The container 5 includes a trunk portion 51, a shoulder portion 52 that is continuous with the trunk portion 51 and has a diameter reduced as it is away from the trunk portion 51, and a spout that is continuous with the shoulder portion 52 and opened at the end of the shoulder portion 52. 53 and a cap portion 54 for opening and closing the spout 53.
The outer surface of the shoulder portion 52 is located inside the outer surface of the trunk portion 51, and there is a space between the extended surface of the outer surface of the trunk portion 51 and the outer surface of the shoulder portion 52.
The outer surface of the trunk portion 51 of the container 5 is the outermost surface of the outer surfaces of the container 5 and corresponds to the outermost diameter portion. The outer surface of the shoulder portion 52 is a surface located inside the body portion 51 and corresponds to a reduced diameter portion.

Of the heat-shrinkable heat-shrinkable tubular label 11 with protrusions, the shrinkage ratio in the region where the protrusions 3 are provided is preferably 5% to 20%.
The shrinkage ratio is obtained based on the following formula.
Formula: Shrinkage ratio = {(peripheral length of the heat-shrinkable cylindrical label 11 with protrusions before heat shrinking-perimeter of the region where the protrusions 3 of the heat-shrinkable tubular label 11 with protrusions after heat shrinkage are provided) / Perimeter of heat-shrinkable cylindrical label 11 with protrusions before heat shrink} × 100.

The heat-shrinkable cylindrical label 11 with protrusions is mounted so that the protrusions 3 correspond to the shoulders 52 (reduced diameter parts). For this reason, the protrusion 3 is located in the space of the container 5.
In general, the container 5 having the body part 51 which is the outermost diameter part, when transported, the body parts of adjacent containers hit each other or the body part comes into contact with a foreign substance. The packaging body 9 to which the cylindrical label 11 is attached can prevent the protruding portion 3 from falling off even if the barrel portions hit each other or the barrel portions come into contact with foreign matter.

In FIG. 7, the heat-shrinkable tubular label 11 with a protrusion is attached so that the protrusion 3 corresponds to the shoulder 52, but the heat-shrink with protrusion so that the protrusion 3 corresponds to the cap part 54. A flexible cylindrical label 11 may be attached. Similarly to the shoulder portion 52, the cap portion 54 also corresponds to a reduced diameter portion that is located on the inner side of the body portion 51 and that creates a space between the outer surface of the body portion 51.
Furthermore, as shown in FIG. 8, the present invention also includes a package 9 on which the heat-shrinkable cylindrical label 11 with a protrusion is attached so that the protrusion 3 corresponds to the recess 51 a of the container 5. In the package 9, the protrusion 3 is located on the inner side of the outermost surface of the outer surface of the container 5.
The body portion 51 of the container 5 has a recessed portion 51a that is partially recessed inward over the entire circumferential direction. The recessed portion 51a corresponds to a reduced diameter portion, and a portion 51b other than the recessed portion 51a in the body portion 51 corresponds to an outermost diameter portion.

In addition, similarly, it is preferable that the winding label 12 with protrusions, the tack label 13 with protrusions, and the like be mounted so that the protrusions 3 are positioned at the reduced diameter part of the adherend such as the container 5.
In the case where a plurality of protrusions 3 are formed on the label with protrusions, the packaging body 9 of the present invention is mounted with the labels with protrusions so that all the protrusions 3 are located in the reduced diameter portion of the adherend. Alternatively, a label with a protrusion may be attached so that a part of the protrusion 3 is positioned at the reduced diameter portion of the adherend.

  Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited to the following examples.

[Substrate used]
(1) Substrate A
A heat-shrinkable polyethylene terephthalate film having a thickness of 45 μm (trade name “LX18S” manufactured by Mitsubishi Plastics, Inc.).
(2) Base material B
A heat-shrinkable polystyrene film having a thickness of 50 μm (trade name “35046SE” manufactured by Mitsubishi Plastics, Inc.).
(3) Base material C
Commercially available tack label base paper (product name “PET50 (A) PAT1PET38” manufactured by Lintec Corporation).
An acrylic overcoat agent is applied to the surface of the polyethylene terephthalate film of the base paper.
(4) Base material D
Commercially available tack label base paper (trade name “OPP60CP3250PET38”, manufactured by Lintec Corporation).
An acrylic overcoat agent is coated on the surface of the polypropylene film of the base paper.

[Hot melt adhesive used]
(1) Hot melt adhesive A
An olefin-based hot melt adhesive mainly composed of a thermoplastic hydrocarbon resin or the like (about 80% by mass). Softening point: 109 ° C., viscosity: 1,300 mPa · s (viscosity at 160 ° C.).
(2) Hot melt adhesive B
Urethane hot melt adhesive mainly composed of urethane prepolymer or the like (about 98% by mass). Viscosity: 4,500 mPa · s (viscosity at 120 ° C.).

[Surface treatment method]
(1) Process A
The surface of the substrate was subjected to corona discharge treatment.
Equipment used: Corona surface treatment equipment manufactured by Kasuga Electric Co., Ltd. Treatment voltage: 51V
Processing current: 5.2A
Processing speed: 50m / min
Process details: Process (2) Process B so that the wetness index of the processed surface is around 40
A urethane-based overcoat agent (manufactured by DIC Graphics, trade name “SF Primer No. 930”) was applied to the surface of the substrate (coating thickness: 2 μm).
(3) Process C
An ultraviolet curable acrylic overcoat agent (manufactured by T & KTOKA, trade name “AF Medium”) was applied to the surface of the substrate (coating thickness 2 μm).
(4) Process D
An ultraviolet curable acrylic overcoat agent (manufactured by T & KTOKA, trade name “CF medium”) was applied to the surface of the substrate (coating thickness 2 μm).

[Reference Example 1]
Treatment C was performed on the surface of the base material B.
The wetting index of the surface (treated surface) of the base material B after the treatment was measured according to JIS K 6768. The results are shown in Table 1.

The substrate B after the treatment is made into two film pieces, and the hot melt adhesive B (coating thickness 20 μm) melted at 130 ° C. is applied to the surface (treated surface) of one film piece, and the other is applied to the surface. The surface (treated surface) of each film piece was superposed and bonded. A test sample piece was obtained by cutting the bonded laminated film into 10 cm × 3 cm.
In order to confirm the adhesive strength between the two film pieces of the obtained test sample piece, the peel strength was measured according to the following method. The results are shown in Table 1.
In the strength results shown in Table 1, “-” indicates that the bonded portion did not peel and the film piece broke and the peel strength could not be measured. In other words, “−” means that the overlap allowance is strongly bonded via the hot melt adhesive so that it cannot be measured.

(Measurement of peel strength)
The test sample piece was subjected to a peel strength test according to JIS Z 0238 using a precision universal testing machine “Autograph AG-I 500N” (manufactured by Shimadzu Corporation) (tensile speed: 300 mm / min).

Moreover, about the film piece which apply | coated and melted the hot-melt-adhesive adhesive, the external appearance of the sample piece for a test | inspection was observed visually whether the distortion etc. had arisen.
The adhesive strength and appearance of the test sample pieces were comprehensively evaluated according to the following criteria.
A1: The adhesive strength was high and the appearance was good.
B1: Although the adhesive strength was good, the appearance was poor.
C1: Both adhesive strength and appearance were poor.

[Reference Examples 2-8 and Comparative Reference Examples 1-2]
Sample samples for testing were prepared in the same manner as in Reference Example 1 except that the base material, surface treatment and hot melt adhesive shown in Table 1 were used, respectively, and wetting index, adhesive strength and A comprehensive evaluation was conducted. The results are shown in Table 1.
However, Comparative Reference Examples 1 and 2 used the base materials A and B themselves without performing the surface treatment of the base material. In addition, the inventors did not perform surface treatment on the substrates C and D used in Reference Examples 7 and 8. However, these base materials C and D are commercially available products in which an acrylic overcoat agent is applied to each surface. These base materials C and D are also subjected to surface treatment in the same manner as in Reference Examples 1 to 6. It is a broken base material.

[Example 1]
In the same manner as in Reference Example 1, treatment C was performed on the surface of the base material B.
By applying a hot melt adhesive B melted at 130 ° C. on the surface (treated surface) of the base material B after treatment using a known hot melt gun in a spot manner, the diameter is about 2 mm and the height is increased. A plurality of dot-like protrusions of about 1 mm were formed at 1 mm intervals.
This base material B was immersed in hot water at 90 ° C. and heat-shrinked by 10%. The base material B after heat shrinkage was mounted by being wound around a cylindrical body having a diameter of 50 mm with the protrusions on the outside.

In addition, before winding around a cylindrical body, the base material after heat shrink was observed visually, and the following reference | standard evaluated. The results are shown in Table 2.
A2: It contracted neatly and the appearance was good.
B2: Some wrinkles occurred, but the appearance was generally good.
C2: Wrinkles were conspicuous and the appearance was poor.

Next, the following test was performed in order to confirm whether or not the protruding portion was dropped.
A spatula tip was applied to the surface of the heat-shrinkable cylindrical label mounted on the cylindrical body (the spatula was applied in such a direction that the flat surface of the spatula included the tangential direction of the cylindrical body), and the cylindrical body was rotated. At this time, the cylindrical body was rotated so that a predetermined pressing force was applied to the protruding portion when the spatula hit the side of the protruding portion of the heat-shrinkable cylindrical label by rotating the cylindrical body.
The results are shown in Table 2.
A3: The pressing force was 3N, and the protrusion did not fall off.
B3: The pressing force was 1N or more and less than 3N, and the protrusions dropped off.
C3: The pressing force was less than 1N, and the protrusions dropped off.

[Examples 2-6 and Comparative Examples 1-2]
A heat-shrinkable cylindrical label for testing was prepared in the same manner as in Example 1 except that the base material, surface treatment, and hot melt adhesive shown in Table 2 were used. And the drop-off test of the protrusion was performed. The results are shown in Table 2.

  DESCRIPTION OF SYMBOLS 1 ... Label with protrusion, 11 ... Heat-shrinkable cylindrical label with protrusion, 12 ... Winding label with protrusion, 13 ... Tack label with protrusion, 21, 22, 23 ... Base material, 3 ... Projection part, 42 ... Adhesion Agent layer, 43 ... Adhesive layer, 5 ... Container, 9 ... Package

Claims (4)

A base material, and a protrusion protruding from the surface of the base material,
The protrusion is formed from a hot melt adhesive that is attached and solidified on the surface of the base material,
A label with protrusions, wherein at least the surface of the substrate to which the hot melt adhesive is attached is subjected to an adhesion improving treatment for increasing the adhesive strength of the hot melt adhesive.   The label with a protrusion according to claim 1, wherein the surface of the base material is roughened as the adhesion improving treatment.   The label with protrusions according to claim 1, wherein the base material has heat shrinkability, and an overcoat layer containing a curable resin is formed on the surface of the base material as the adhesion improving treatment. An adherend having an outermost diameter part and a reduced diameter part located inside the outermost diameter part, and a label with a protrusion according to any one of claims 1 to 3,
The package body, wherein the protrusion-attached label is attached to the adherend so that the protrusion corresponds to a reduced diameter portion of the adherend.

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