JP2020019510A - Winding label and bottle-like container with label - Google Patents

Abstract

To provide a winding label and a bottle-like container with a label having an excellent temperature holding property.SOLUTION: A winding label is a belt-like label. The winding label becomes a headband shape by winding the belt-like label and by a terminal end being overlapped and attached onto a starting end. In the headband shape, a surface layer (C) and a base material layer (A) are provided in this order from the outside to the inside in the radial direction of the winding label, both the surface layer (C) and the base material layer (A) are porous films containing thermoplastic resin, and the thickness of the winding label is 50-200 μm.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wound label and a labeled bottle-shaped container.

  Articles such as merchandise and merchandise containers may be provided with paper or resin labels for displaying or explaining the merchandise. Above all, resin labels have high applicability because they have high adhesiveness to various materials of articles such as resin, glass, and metal, and are excellent in water resistance, durability and the like. As a method for mounting a resin label, a cylindrical film label is loaded on the outer periphery of the article to be mounted, and then shrinked by heat shrinking to adhere to the article, and the cylindrical film label is stretched and mounted on the outer circumference of the article. (See, for example, Patent Documents 1 to 3).

  The label may have a function other than displaying a product to cover the outer periphery of the article. For example, a label colored for light shielding may be used. In addition, bottle-shaped containers such as beverages may be heated, but if the material of the container is a material having high thermal conductivity, the container itself becomes hot when heated, and the container must be held by hand. Becomes difficult. Therefore, it has been proposed to attach a label made of a nonwoven fabric or a foamed polystyrene sheet or the like coated with an ultraviolet or electron beam curable resin coating to a portion of the container held by the hand (for example, see Patent Documents 4 and 5). ).

JP-A-56-48941 JP-A-2-37837 JP-A-1-99935 JP 2004-198467 A JP 2004-70077 A

  In the bottle-shaped container made of a material having high thermal conductivity as described above, heat is easily transmitted from the inside to the outside, so that the temperature of the contents is easily changed by the outside temperature. In particular, a bottle-shaped container for accommodating a beverage is often cooled when the temperature is high and warmed when the temperature is low. Since the temperature difference from the outside air temperature is large and the temperature of the beverage after being taken out of the refrigerator or the heating chamber is apt to change, the present inventors have repeatedly studied whether the label can keep the temperature of the beverage for a long time. Was.

  An object of the present invention is to provide a rolled label and a labeled bottle-shaped container excellent in temperature retention.

  As a result of extensive studies by the present inventors to solve the above-described problems, if the wound label has a specific thickness of the laminate of the porous thermoplastic resin film, so as to have a specific coverage. The present inventors have found that the above problem can be solved when wound around the outer peripheral surface of a bottle-shaped container and mounted in a headband shape, and completed the present invention.

That is, according to one aspect of the present invention,
(1) a band-shaped label, wherein the band-shaped label is wound, and the end portion is superimposed on and adhered to the start end portion, thereby forming a headband shape;
It has a surface layer (C) and a base material layer (A) in this order from the radially outer side to the inner side of the wound label when the head-shaped label is formed,
Both the surface layer (C) and the base material layer (A) are porous films containing a thermoplastic resin,
The thickness of the wound label is 50 to 200 μm,
A roll label is provided.

(2) The porosity of the wound label is preferably 10 to 50%.

(3) The ratio of the thickness of the base material layer (A) to the thickness of all the layers of the wound label is preferably 30 to 80%.

(4) The base material layer (A) is 20 to 100% by mass of the thermoplastic resin and at least one of 0 to 80% by mass of an inorganic fine powder (D1) and 0 to 50% by mass of an organic filler (D2); Is preferable.

(5) The surface layer (C) contains 20 to 100% by mass of the thermoplastic resin and at least one of 0 to 80% by mass of the inorganic fine powder (D1) and 0 to 50% by mass of the organic filler (D2). It is preferred to contain.

(6) It is preferable that the inorganic fine powder (D1) and the organic filler (D2) have an average particle diameter of 0.1 to 20 μm.

According to another aspect of the present invention,
(7) A labeled bottle-shaped container having a label attached to an outer peripheral surface thereof,
The label is formed by winding the wound label according to any one of (1) to (6) along the outer peripheral surface of the bottle-shaped container, and bonding the end part on the start end of the wound label. It is a label attached in a headband shape with
The coverage of the wound label on the outer peripheral surface of the labeled bottle-shaped container is 50% or more.
A labeled bottle is provided.

(8) Preferably, the labeled bottle-shaped container is a beverage container.

  Advantageous Effects of Invention According to the present invention, it is possible to provide a wound label and a labeled bottle-shaped container excellent in temperature retention.

FIG. 3 is a top view illustrating a wound label of one embodiment of the present invention. FIG. 3 is a cross-sectional view illustrating a wound label according to one embodiment of the present invention. It is a perspective view showing the bottle-shaped container with a label of one embodiment of the present invention.

Hereinafter, the wound label and the labeled bottle-shaped container of the present invention will be described in detail. However, the description of the constituent requirements described below is an example (representative example) as one embodiment of the present invention. Not specified.
In the following description, the description of “(meth) acryl” indicates both acryl and methacryl.

(Structure of rolled label)
The wound label of the present invention is a band-shaped label having a start end and an end. The wound label of the present invention is formed into a head-wound label by winding a band-shaped label along the outer peripheral surface of the article starting from the start end, and overlapping and adhering the end to the start end.

  The beginning and end of the wound label are glued together so that they can overlap and adhere to each other. The area of the starting end or the terminating end with respect to the entire area of the wound label is usually 3 to 30%, and from the viewpoint of facilitating adhesion, preferably 5 to 20%, more preferably 7 to 15%. It is. The area required for the margin depends on the shape of the wound label, the type and amount of adhesive used, the shape of the article to be mounted, the surface condition, etc. What is necessary is just to select according to a user.

The wound label of the present invention is preferably provided with a tab. By pinching and pulling the tab of the wound label attached to the article, the wound label can be torn, and the peeling of the wound label from the article is facilitated.
The tab can be provided at any end of the winding label.However, from the viewpoint of easiness of tearing, the tab is provided at an end other than the start end and the end, that is, at an end located in a direction substantially perpendicular to the winding direction. Preferably, it is provided. In the present invention, the direction substantially orthogonal to the direction means a direction within ± 20 ° from the orthogonal direction, preferably a direction within ± 10 °, and more preferably a direction within ± 5 °. And more preferably the direction within the range of ± 3 °.

  The width of the tab is preferably 0.5 cm or more, and more preferably 0.7 cm or more, from the viewpoint of easy grasping. From the viewpoint of easiness of tearing, the width of the tab is preferably 5 cm or less, more preferably 3 cm or less.

  From the viewpoint of facilitating peeling, it is preferable that a perforation extending from the tab is provided from one end of the wound label where the tab is provided to the other end opposite to the tab. It is preferable that the direction in which the perforations extend is a direction substantially perpendicular to the winding direction of the wound label, because the wound label is easily torn when the tab is pulled.

FIG. 1 shows a wound label 1 according to one embodiment of the present invention.
As shown in FIG. 1, the wound label 1 has a rectangular band shape, and has a start end 2 and an end 3 at both ends in the longitudinal direction. The longitudinal direction is the same as the winding direction x of the winding label 1. The shape of the wound label 1 is not limited to a rectangle as long as the start end 2 and the end 3 can be overlapped, and may be other shapes such as a trapezoid, a parallelogram, and a sector. Further, the four corners of the wound label 1 may be right angles or arc shapes. The size of the wound label 1 may be selected in accordance with the size of the outer peripheral surface of the article to be mounted, the covering rate of covering the outer peripheral surface of the article with the wound label 1, and the like.

  A tab 4 is provided at the end of the wound label 1 other than the start end 2 and the end 3, that is, at the end in the direction y substantially orthogonal to the winding direction x by providing two notches 5. For example, by providing two notches 5 at an interval of 1 cm, a tab 4 having a width of 1 cm can be provided. The formation position and the formation method of the tab 4 are not limited to this. The wound label 1 is provided with two perforations 6 extending from the tips of the two notches 5 in the direction y from one end where the notches 5 are provided to the other end.

(Layer structure of rolled label)
The wound label of the present invention is a laminate having a base material layer (A) and a surface layer (C). The surface layer (C) and the base material layer (A) are formed such that, when the wound label of the present invention is a headband label, the surface layer (C), It is located in the order of the base material layer (A).

FIG. 2 shows a layer structure of the wound label 1 which is one embodiment of the present invention.
As shown in FIG. 2, the wound label 1 has a surface layer C provided on a base material layer A.

  Both the base material layer (A) and the surface layer (C) are porous thermoplastic resin films. The thickness of the wound label of the present invention is 50 to 200 μm. As described above, a laminated label having a high heat insulating effect can be obtained by laminating a porous thermoplastic resin film capable of enclosing a large amount of air having a high heat insulating property and further making the laminated body a specific thickness. If this wound label is wound around the outer peripheral surface of the article and attached to the article as a headband-shaped label, an appropriate gap is generated between the article and the label, and not only the label but also the heat insulating property of the gap, the gap between the article and the outside. Heat conduction can be reduced. Therefore, according to the wound label of the present invention, it is possible to effectively suppress the temperature change of the article. In particular, when the article is a bottle-shaped container for a beverage that is often heated or cooled, by attaching the wound label of the present invention, the temperature of the beverage after the heating or cooling can be maintained. Yes, it is highly useful. Further, by setting the coverage by the wound label to a specific coverage, it is possible to maintain the temperature for a long time.

  When the thickness of the wound label is 50 μm or more, excellent temperature holding properties are obtained as described above, and when the thickness is 200 μm or less, the stiffness of the label is suppressed, the winding becomes easy, and the head is wound after being wound. The shape can be easily maintained. Since the temperature holding effect when the thickness is larger than 200 μm is almost the same as the temperature holding effect at 200 μm or less, the production cost can be reduced while obtaining a high temperature holding effect by setting the thickness at 200 μm or less. The thickness of the wound label is preferably 60 μm or more from the viewpoint of enhancing the temperature holding property. On the other hand, the thickness of the wound label is preferably 130 μm or less, and more preferably 95 μm or less, from the viewpoint of ease of winding and maintaining the shape of the headband. Therefore, the thickness of the wound label is preferably from 60 to 130 μm, more preferably from 60 to 95 μm.

(Thermoplastic resin)
Examples of the thermoplastic resin that can be used for the base layer (A) and the surface layer (C) include crystalline polyethylene resins such as high-density polyethylene, medium-density polyethylene, and low-density polyethylene, crystalline polypropylene resins, and polymethyl-1. -Crystalline polyolefin resins such as pentene; polyamide resins such as nylon-6, nylon-6,6, nylon-6,10, nylon-6,12; thermoplastic polyesters such as polyethylene naphthalate and aliphatic polyesters. Thermoplastic resins such as resin, polycarbonate, atactic polystyrene, syndiotactic polystyrene, and polyphenylene sulfide are exemplified. These may be used in combination of two or more.

  Among these, a crystalline polyolefin-based resin is preferable, and a crystalline polypropylene-based resin is more preferable from the viewpoints of chemical resistance, production cost, and the like. The crystalline polyolefin-based resin is a polyolefin resin whose melting point is observed by a differential scanning calorimeter (DSC). When the polyolefin resin exhibits crystallinity, pores (openings) are easily formed on the surface of the thermoplastic resin film by stretching. The crystallinity of the crystalline polyolefin resin by X-ray diffraction is usually preferably 20% or more, more preferably 35 to 75%. The crystallinity can be measured by infrared spectrum analysis or the like in addition to the X-ray diffraction method.

  As the crystalline polypropylene resin, it is preferable to use an isotactic polymer or a syndiotactic polymer obtained by homopolymerizing propylene. In addition, propylene having various stereoregularities obtained by copolymerizing propylene with α-olefin such as ethylene, 1-butene, 1-hexene, 1-heptene, 4-methyl-1-pentene, and the like is a main component. Copolymers can also be used. The copolymer may be a binary system or a ternary or higher system, and may be a random copolymer or a block copolymer.

(Inorganic fine powder (D1) and organic filler (D2))
The base material layer (A) and the surface layer (C) preferably contain at least one of the inorganic fine powder (D1) and the organic filler (D2) from the viewpoint of increasing the number of internal pores and improving heat insulation.

  Examples of the inorganic fine powder (D1) that can be used for the base material layer (A) and the surface layer (C) include heavy calcium carbonate, light calcium carbonate, calcined clay, talc, titanium oxide, barium sulfate, zinc oxide, and magnesium oxide. , Diatomaceous earth, silicon oxide, and other inorganic fine powder, composite inorganic fine powder having aluminum oxide or hydroxide around the core of the inorganic fine powder, hollow glass beads, and the like. Above all, heavy calcium carbonate, calcined clay or diatomaceous earth are preferable because they are inexpensive and can form many pores by stretching.

  The organic filler (D2) that can be used for the base material layer (A) and the surface layer (C) has a melting point or a glass transition point higher than that of the thermoplastic resin, and a resin that is incompatible with the thermoplastic resin is an empty resin. It is preferable from the viewpoint of pore formation. Specific examples of the organic filler (D2) include, for example, polyethylene terephthalate, polybutylene terephthalate, polyamide, polycarbonate, polyethylene naphthalate, polystyrene, homopolymer or copolymer of (meth) acrylate, melamine resin, polyethylene sulfite , Polyimide, polyethyl ether ketone, polyphenylene sulfide, homopolymer of cyclic olefin, copolymer of cyclic olefin with ethylene (COC) and the like. When a crystalline polyolefin resin is used as the thermoplastic resin, as the organic filler (D2), in particular, homopolymers of polyethylene terephthalate, polybutylene terephthalate, polyamide, polycarbonate, polyethylene naphthalate, polystyrene, and cyclic olefin; It is preferable to use a copolymer (COC) such as a cyclic olefin and ethylene.

  As the inorganic fine powder (D1) or the organic filler (D2) used for the base material layer (A) or the surface layer (C), one of the above may be used alone, or two or more kinds may be used in combination. May be used. When two or more kinds are used in combination, a combination of the inorganic fine powder (D1) and the organic filler (D2) may be used. From the viewpoint of improving the whiteness, opacity, and strength of the obtained wound label, the inorganic fine powder (D1) is more preferable.

  In both the base material layer (A) and the surface layer (C), the average particle size of the inorganic fine powder (D1) or the organic filler (D2) is preferably 0.1 μm or more, and more preferably 0.5 μm or more. More preferably, there is. When the average particle diameter is 0.1 μm or more, pore formation by mixing and stretching with a thermoplastic resin is facilitated, and a porous thermoplastic resin film having pores of a desired size and number is easily obtained. Tend. In addition, the average particle diameter of the inorganic fine powder (D1) or the organic filler (D2) is preferably 20 μm or less, more preferably 15 μm or less. If the average particle size is 20 μm or less, the stretchability is good, and the film tends to be easily torn or perforated during stretching. Therefore, the average particle diameter of the inorganic fine powder (D1) or the organic filler (D2) in the base material layer (A) or the surface layer (C) is preferably 0.1 to 20 μm, more preferably 0.1 to 20 μm. 5 to 15 μm.

The average particle size of the inorganic fine powder (D1) is 50% in cumulative particle size (cumulative 50% particle size) by a particle measuring device, for example, a laser diffraction type particle measuring device (trade name: Microtrack, manufactured by Nikkiso Co., Ltd.). Can be determined by measuring
The average particle diameter of the organic filler (D2) can be determined as the average dispersed particle diameter dispersed in the thermoplastic resin by melt-kneading and dispersion. Specifically, the cross section of the wound label is observed with an electron microscope, the particle diameter of at least 10 organic fillers in the wound label is measured, and the average value of the particle diameters can be determined as the average particle diameter. .

(Porosity)
The porosity of the wound label is preferably 10% or more. When the porosity is 10% or more, the number of cavities holding air increases, and the temperature retention is easily improved. On the other hand, the porosity of the wound label is preferably 50% or less. When the porosity is 50% or less, the durability of the label is easily improved, and breakage due to abrasion or the like during transfer of the article with the label is easily suppressed.
Therefore, the porosity of the wound label is preferably 10 to 50%.

The porosity of the base material layer (A) is preferably 10% or more from the viewpoint of improving the temperature retention, and is preferably 50% or less from the viewpoint of the durability of the label. Therefore, the porosity of the base material layer (A) is preferably from 10 to 50%.
The porosity of the surface layer (C) is preferably 5% or more. When the porosity is 5% or more, sufficient absorbability of the ink printed on the surface layer (C) or fixability of the toner is easily obtained, and the printability is easily improved. The porosity of the surface layer (C) is preferably 35% or less. When the porosity is 35% or less, the durability of the label is easily improved, and the damage due to abrasion or the like at the time of transport of the article with the label is easily suppressed. Therefore, the porosity of the surface layer (C) is preferably from 5 to 35%.

  The porosity of the wound label is determined by the average particle size of the inorganic fine powder (D1) or the organic filler (D2), the composition of the thermoplastic resin film containing the inorganic fine powder (D1) or the organic filler (D2), for example, polypropylene resin. It can be adjusted by the stretching conditions such as the ratio of the polyethylene resin and the stretching ratio, the stretching temperature and the stretching ratio.

  The porosity (%) can be determined from the ratio of the area occupied by vacancies in a certain region of the cross section of the film observed with an electron microscope. Specifically, an arbitrary part of the film to be measured is cut out, embedded in an epoxy resin and solidified, and then cut perpendicularly to the surface direction of the film to be measured using a microtome. Affix to the observation sample table so that it becomes the observation surface. Gold or gold-palladium is vapor-deposited on the observation surface, holes in the film are observed at an arbitrary magnification (for example, a magnification of 500 to 3000 times) that is easy to observe with an electron microscope, and the observed area is image data. Take in as. The obtained image data is subjected to image processing by an image analyzer, and the area ratio (%) of the porosity portion in a certain region of the film is obtained, and is set as the porosity (%). When the porosity of the wound label is obtained, the porosity can be obtained by averaging the measured values at arbitrary 10 or more observations in the entire thickness direction of the wound label. When the porosity of each layer of the base material layer (A) and the surface layer (C) is determined, the porosity and the porosity are determined by averaging any 10 or more measured values within the thickness direction of each layer. do it.

(Blending amount)
The content of the thermoplastic resin in the base material layer (A) or the surface layer (C) is preferably 20% by mass or more, more preferably 30% by mass or more, from the viewpoint of improvement in mechanical strength. More preferably, it may be 100% by mass. In addition, the content of the thermoplastic resin in the base material layer (A) or the surface layer (C) is preferably 80% by mass or less, and more preferably 70% by mass, from the viewpoint of forming pores. Therefore, the content of the thermoplastic resin in the base material layer (A) or the surface layer (C) is preferably 20 to 100% by mass, more preferably 30 to 80% by mass, and still more preferably 40 to 70% by mass. % By mass.

  The content of the inorganic fine powder (D1) in the base material layer (A) or the surface layer (C) is preferably 20% by mass or more, and more preferably 30% by mass or more, from the viewpoint of pore formation. . Further, the content of the inorganic fine powder (D1) in the base material layer (A) or the surface layer (C) is preferably 80% by mass or less, from the viewpoint of making the film thickness uniform, and 70% by mass. % Or less, more preferably 60% by mass or less, and may be 0% by mass. Therefore, the content of the inorganic fine powder (D1) in the base material layer (A) or the surface layer (C) is preferably from 0 to 80% by mass, more preferably from 20 to 70% by mass, and still more preferably. 30 to 60% by mass.

  The content of the organic filler (D2) in the base material layer (A) or the surface layer (C) is preferably larger than 0% by mass from the viewpoint of pore formation. In addition, the content of the organic filler (D2) in the base material layer (A) or the surface layer (C) is preferably 50% by mass or less, and more preferably 40% by mass, from the viewpoint of making the film thickness uniform. The following is more preferable, and 30% by mass or less is further preferable, and may be 0% by mass. Therefore, the content of the organic filler (D2) in the base material layer (A) or the surface layer (C) is preferably 0 to 50% by mass, more preferably 0 to 40% by mass, and still more preferably 0 to 40% by mass. ３０30% by mass.

Therefore, from the viewpoint of mechanical strength of the film, formation of pores, and uniformity of the film thickness, the base material layer (A) or the surface layer (C) contains 20 to 100% by mass of the thermoplastic resin and inorganic fine powder ( It is preferable to contain at least one of D1) 0 to 80% by mass and the organic filler (D2) 0 to 50% by mass.
When both the inorganic fine powder (D1) and the organic filler (D2) are contained, the total content of both in the base material layer (A) or the surface layer (C) is preferably from 10 to 80% by mass, More preferably, it is 20 to 70% by mass, and still more preferably 30 to 60% by mass.

  The base material layer (A) or the surface layer (C) may be a heat stabilizer, an ultraviolet stabilizer, an antioxidant, an antiblocking agent, a nucleating agent, a lubricant, and a coloring agent, if necessary, as long as the temperature retention is not impaired. And the like. The content of the additive in the base material layer (A) or the surface layer (C) is usually 5% by mass or less, preferably 3% by mass or less.

(Thickness)
As described above, the thickness of all layers of the wound label of the present invention is 50 to 200 μm, preferably 60 to 95 μm.

  The ratio of the thickness of the base material layer (A) to the total thickness of the wound label of the present invention is preferably 30 to 80%. When the thickness ratio is 30% or more, sufficient stiffness of the wound label is easily obtained, and workability when wound around an article such as a bottle-shaped container is easily improved. Further, when the thickness ratio is 80% or less, when the base material layer (A) having a higher porosity than the surface layer (C) is torn, the tear is not easily propagated to the surface layer (C), and the wound label is not formed. Strength is easily improved.

  The thickness of the base material layer (A) is preferably at least 30 μm, more preferably at least 40 μm. When the thickness is 30 μm or more, sufficient stiffness of the wound label is easily obtained, and workability when wound around an article such as a bottle-shaped container is easily improved. The thickness of the base material layer (A) is preferably 120 μm or less, more preferably 90 μm or less. When the thickness is 120 μm or less, when the substrate layer (A) having a higher porosity than the surface layer (C) is torn, the tear is not easily propagated to the surface layer (C), and the strength of the label is easily improved. . Therefore, the thickness of the base material layer (A) is preferably from 30 to 120 μm, more preferably from 40 to 90 μm.

  The thickness of the surface layer (C) is preferably 15 μm or more, more preferably 24 μm or more. When the thickness is 15 μm or more, the smoothness of the surface is high, and the printability, in particular, the printability for gravure printing is easily improved. Further, the thickness of the surface layer (C) is preferably 62 μm or less, more preferably 57 μm or less. When the thickness is 62 μm or less, the surface strength is easily maintained, and a firm label is easily obtained. Therefore, the thickness of the surface layer (C) is preferably 15 to 62 μm, more preferably 24 to 57 μm.

(Method of manufacturing rolled labels)
The wound label of the present invention can be manufactured by a known method. For example, the wound label of the present invention may be laminated after forming the films of the base material layer (A) and the surface layer (C). As a method of forming a film, a resin composition containing a thermoplastic resin, an inorganic fine powder (D1), an organic filler (D2), and the like is melted by a T-die, an I-die, or the like connected to a screw-type extruder to form a sheet. Cast molding, calender molding, rolling molding, inflation molding and the like. In addition, film forming and lamination of the base material layer (A) and the surface layer (C) are performed by using a usual method such as a feed block, a multilayer die method using a multi-manifold, or an extrusion lamination method using a plurality of dies. Can be performed in parallel.

  The method for forming the porous thermoplastic resin film is not particularly limited. The porous thermoplastic resin film can be formed by stretching a thermoplastic resin film containing an inorganic fine powder (D1), an organic filler (D2), or the like, It can also be formed by other known methods such as foaming using a solvent or a solvent. From the viewpoint of easy production and easy formation and maintenance of pores, it is preferable to form a porous thermoplastic resin film by stretching.

The substrate layer (A) and the surface layer (C) may be a non-stretched film or a stretched film stretched uniaxially or biaxially. It is preferable that the base material layer (A) and the surface layer (C) are stretched films from the viewpoints of improving the hole formability and mechanical strength.
For example, by laminating the surface layer (C) on the base material layer (A) and stretching in a uniaxial direction or a biaxial direction at a temperature lower than the melting point of the thermoplastic resin used for each layer, all the layers become 1 layer. A stretched film stretched in the axial or biaxial direction can be obtained. Further, the surface layer (C) is laminated on the base material layer (A) stretched in the uniaxial direction, and is uniaxially stretched in an axial direction different from that of the base material layer (A), whereby uniaxial / biaxial stretching is performed. Films can also be obtained. Although the base material layer (A) and the surface layer (C) may be separately stretched and laminated, it is preferable to laminate the respective layers and then stretch them collectively, because it is simpler and can reduce the production cost.

  Examples of the stretching method that can be used include, for example, inter-roll stretching using a peripheral speed difference between roll groups, and clip stretching using a tenter oven. According to the inter-roll stretching, the desired stiffness, opacity, smoothness, glossiness, and the like can be easily obtained by adjusting the stretching ratio arbitrarily, which is preferable.

  The stretching temperature is usually a temperature 5 to 60 ° C. lower than the melting point of the resin. When two or more resins are used, the stretching temperature is preferably at least 5 ° C. lower than the melting point of the resin with the largest blending amount.

  The stretching ratio is not particularly limited, and is determined in consideration of the intended use of the wound label of the present invention and the characteristics of the resin used. In the case of stretching between rolls, the stretching ratio is usually preferably 2 to 11 times, more preferably 3 to 10 times, and further preferably 4 to 7 times. In the case of clip stretching using a tenter oven, the stretching ratio is preferably 4 to 11 times.

  The area ratio, which is the product of the respective draw ratios in the film flow direction (MD) and the width direction (TD) perpendicular to the flow direction, is usually 2 to 80 times, preferably 3 to 60 times, more preferably It is 4 to 50 times. When the area magnification is 2 times or more, there is a tendency that uniformity of the film thickness of the film is facilitated by preventing stretching unevenness. When the area magnification is 80 times or less, there is a tendency that stretch breakage or coarse perforation is suppressed.

  The stretched film is preferably heat-treated (annealed). The temperature of the heat treatment is preferably selected to be 30 ° C. higher than the stretching temperature. By the heat treatment, the latent stress due to the stretching is relaxed, the thermal shrinkage in the stretching direction is reduced, and the tightness of winding at the time of storage of the product and the waving caused by the shrinkage due to heat are easily reduced. The method of heat treatment is generally a method of heating with a roll or an oven, and these may be combined. Heat treatment in a state where tension is applied to the stretched film is preferable because the effect of the heat treatment is easily improved.

  From the viewpoint of improving printability, it is preferable to perform a surface treatment such as a corona discharge treatment or a plasma treatment on the surface of the wound label after the heat treatment.

  The wound label of the present invention can be printed on both sides. For example, when the wound label is wound in a headband shape, various information such as the product name of the label and the method of using the product can be printed on the surface facing outward in the radial direction, and the surface facing inward in the radial direction can be printed on the surface facing outward in the radial direction. Information that can be used as lotteries, coupons, application tickets, etc. can be printed. The printed content on the surface facing inward in the radial direction can be seen through the article when a rolled label is attached to a transparent article, and can be seen for the first time when peeled off when attached to an opaque article. It is effective in the case of. The printing method is not particularly limited, and a commonly used method such as gravure printing, screen printing, or flexographic printing can be employed.

(Attach a rolled label to an article)
The wound label of the present invention can be attached to an article in a headband shape by winding the article around the outer peripheral surface of the article starting from the starting end, overlapping the end on the starting end, and adhering with an adhesive. As described above, the glue method using an adhesive does not require large manufacturing equipment only by applying and laminating the adhesive, and can increase the processing speed, so that the production cost can be reduced. In addition, by appropriately selecting the type of the adhesive or, in the case of an emulsion adhesive, the phase transition temperature, a wound label can be attached to articles of various materials.

  Examples of the material of the article to which the wound label of the present invention can be attached include metals such as aluminum and stainless steel; glass; porcelain; polyethylene terephthalate (PET), high-density polyethylene, polypropylene, polyester, polystyrene, polyvinyl chloride, and polycarbonate. Plastics and the like can be mentioned. Among them, from the viewpoint of adhesion when wound, metal, glass, ceramics, high-density polyethylene, polypropylene, polyester, or polystyrene are suitable, and polyesters such as PET bottles are particularly suitable.

  The shape of the article to which the wound label of the present invention is attached is not particularly limited as long as the wound label can be wound into a headband shape. For example, the cross section of the part around which the wound label of the article is wound may have any shape such as a circle, an ellipse, and a rectangle. From the viewpoint of ease of winding, the cross-sectional shape of the portion to be wound is preferably a circle or an ellipse, and more preferably a circle. The article to which the wound label of the present invention is attached may be a tubular article or a bottle article having a hollow portion, or may be an article having no hollow portion. The diameter of the part of the article around which the wound label is wound may be smaller than or the same as the part adjacent to the part. When the diameter of the part around which the wound label of the article is wound is smaller than that of the adjacent part, that is, when the wound label is wound around the concave portion provided on the outer peripheral surface of the article, peeling of the wound label due to rubbing or the like is suppressed. It is easy to obtain and is preferable.

  The use of the article to which the wound label of the present invention is attached is not particularly limited, and examples thereof include a container, piping, an article for advertisement, a baton, a pole, and a lighting device. Above all, a container is suitable as the article to which the roll label is attached, and among these containers, a beverage container is suitable. Containers for beverages include, for example, water (mineral water), soft drinks, carbonated drinks, juices, milk drinks, lactic acid drinks, beer, wine, sake, various distilled spirits, nutritional drinks, seasonings, medical chemicals, cosmetics, Containers for chemicals and the like are included.

(adhesive)
The method of bonding the start end and the end of the wound label is not particularly limited, and one or both of the start end and the end may be coated with an adhesive in advance and then wound and then bonded, After turning, an adhesive may be inserted between the start end and the end to bond them together. It is preferable to apply an adhesive in advance because the work is easy.

  There is no particular limitation on the type of adhesive used for bonding the start end and the end of the wound label, and it is possible to appropriately select and use an aqueous adhesive, a pressure-sensitive adhesive, a hot melt adhesive, or the like. it can. Of these, hot melt adhesives are preferred. Examples of the hot melt adhesive include EVA resin hot melt adhesives, synthetic rubber hot melt adhesives, polyolefin hot melt adhesives, polyamide hot melt adhesives, and saturated polyester hot melt adhesives. Agents, polyurethane resin-based hot melt adhesives and the like can be used. It is preferable to use a synthetic rubber-based hot-melt adhesive for bonding the wound label of the present invention. The type and amount of the adhesive applied to the start end and the adhesive applied to the end end may be the same or different.

  The peeling force or adhesive force of the wound label of the present invention can be adjusted by selecting the type of the adhesive, or can be adjusted by the coating pattern of the adhesive. Examples of the adhesive application pattern at the start end include a pattern in which an adhesive portion and a non-adhesive portion are mixed, such as a halftone dot, a lattice, a striped pattern, and a checkered pattern. By changing the area ratio of the bonded portion / non-bonded portion of the pattern in which the bonded portion and the non-bonded portion are mixed, the adjustment of the bonding force becomes easy. In addition, it is preferable that the coating pattern of the adhesive at the end portion is a belt-shaped pattern that is long in a direction substantially perpendicular to the winding direction.

  The ratio of the area to which the adhesive is applied is usually 10% or more, preferably 30 to 90%, and more preferably 50 to 80%, of the start end or the end. When the coating area ratio is 10% or more, there is a tendency that high adhesion is easily provided between an article such as a container and a wound label. When the coating area ratio is 100%, a sufficient adhesive force is obtained, and when it is 90% or less, a gap is easily formed between the label and the article, and the drying time of the adhesive tends to be short. It is easy to adjust the peel strength and the remaining amount of the adhesive.

(Labeled bottle)
The labeled bottle-shaped container of the present invention is a container having the above-described wound label of the present invention attached to the outer peripheral surface. That is, in the labeled bottle-shaped container of the present invention, the wound label of the present invention is wound along the outer peripheral surface of the bottle-shaped container, and the end portion is overlapped on the start end portion of the rolled label and adhered, thereby forming a head-wound shape. Label is attached.

The coverage of the wound label on the outer peripheral surface of the labeled bottle-shaped container of the present invention is 50% or more.
It is a laminate of a porous thermoplastic resin film, and the inside of the bottle-shaped container is covered by covering the outer peripheral surface of the bottle-shaped container at a coverage of 50% or more using a winding label having a thickness of 50 to 200 μm. The heat conduction between the outside and the outside can be effectively suppressed. Thereby, the temperature change of the content of the bottle-shaped container is suppressed for a long time, and a labeled bottle-shaped container having excellent temperature holding properties can be obtained. In particular, when the labeled bottle-shaped container is a beverage container, the temperature of the heated or cooled beverage can be maintained for a long time.

  The higher the coverage of the wound label, the easier it is to maintain the temperature for a longer time. The coverage may be 100%, but the temperature retention is about the same between the case where the coverage is 67% or less and the case where the coverage exceeds 67%. Therefore, the coverage is preferably 67% or less.

  The coverage (%) of the wound label is obtained as a ratio of the area of the wound label to the area of the side surface of the bottle-shaped container to which the wound label is attached. For example, when the body of the bottle-shaped container is a cylindrical body, the diameter of the body of the bottle-shaped container, the height from the bottom of the bottle-shaped container to the lower portion of the cap, and the area of the side surface of the cylindrical body are obtained. The ratio of the area of the wound label to the area of the side surface is determined as the coverage. If the diameter of the body differs depending on the height, the area of the side surface is determined by regarding the body as a cylindrical body having the maximum diameter as the diameter. When the body of the bottle-shaped container is a prismatic body, the area of the side surface is determined by the length of each side of the body of the bottle-shaped container, the height from the bottom of the bottle-shaped container to the lower part of the cap, and the like. Then, the ratio of the area of the wound label to the determined area of the side surface is determined as the coverage. If the length of the side of the trunk differs depending on the height, the area of the side is determined by regarding the side of the trunk as a prism having the longest side on each side.

FIG. 3 illustrates an example of a labeled bottle-shaped container of one embodiment of the present invention.
As shown in FIG. 3, the bottle-shaped container 10 with a label has the wound label 1 shown in FIG. 1 mounted on the outer peripheral surface of the cylindrical body 21 of the bottle-shaped container 20. The wound label 1 is wound around the bottle-shaped container 20 in the circumferential direction from the start end 2 as a starting point, and then the end 3 is overlapped on the start end 2 and adhered. A concave portion 22 having a smaller diameter than the body portion 21 is provided on the outer peripheral surface of the body portion 21, and the wound label 1 is wound around the outer peripheral surface of the concave portion 22. By grasping the tab 4 provided on the wound label 1 and pulling it along the perforation 6 in the direction of the arrow, the wound label 1 can be easily peeled from the bottle-shaped container 20.

  If the diameter of the cylindrical body 21 is d1 and the height from the bottom of the body 21 to the lower part of the cap 30 is d2, the bottle-shaped container 20 is regarded as a cylindrical body, and the area of the side surface of the labeled bottle-shaped container 10 is shown. Can be expressed as π × d1 × d2. The ratio of the area of the wound label 1 covering the side surface to the area of the side surface is the coverage (%) of the wound label 1.

  Hereinafter, the present invention will be described more specifically with reference to Production Examples, Examples, Comparative Examples, and Test Examples. The materials, amounts used, ratios, processing details, processing procedures, and the like shown in Production Examples and Examples can be appropriately changed without departing from the present invention. Therefore, the scope of the present invention should not be construed as being limited by the specific examples described below.

[Example 1]
(Production of thermoplastic resin film)
The compound (a) described in Table 1 was melt-kneaded with an extruder set at 250 ° C, extruded, and cooled to 70 ° C with a cooling device to obtain a single-layer unstretched film. After heating this unstretched film to 140 ° C., it was stretched 5 times in the longitudinal direction between rolls to obtain a longitudinally uniaxially stretched film. The blends (b) and (c) were each melt-kneaded with an extruder set at 250 ° C., and laminated on both sides of the longitudinally uniaxially stretched film. After heating the obtained laminated film to 155 ° C, it was stretched 8 times in the transverse direction using a tenter stretching machine, and heat-treated at 165 ° C. Both surfaces of this laminated film were subjected to a corona treatment of 40 W / m ² · min using a discharge treatment machine (manufactured by Kasuga Electric Co., Ltd.) to obtain a surface layer (C1) / substrate layer (A) / surface layer ( C2) 3-layer stretched film (each layer thickness: 15/30/15 μm, total thickness: 60 μm, ratio of thickness of base material layer (A): 50%, number of stretched axes of each layer: 1 axis / 2 axes / 1 axis ) Was obtained.

(Manufacture of rolled labels and mounting on containers)
From the obtained thermoplastic resin film, a wound label having a width of 225 mm and a length of 90 m was cut out. The wound label was provided with a tab in the same manner as the tab 4 shown in FIG.
Next, using a labeling machine LNS type (manufactured by Koyo Automatic Machinery Co., Ltd.), the body of a 350 ml PET bottle (a cylindrical PET bottle having a diameter of 67 mm) was wound around the body of the label using an adhesive. The beginning was bonded. Next, the winding label is wound around the outer peripheral surface of the body portion in the shape of a head winding starting from the starting end of the winding label, and an adhesive is applied to an overlapping portion having a width of 20 mm at the end of the winding label overlapping the starting end. The terminal part was adhered on the top to obtain a bottle with a label. The coated area of the adhesive at the bonding portion between the PET bottle as a container and the start end of the rolled label was 10 mm wide x 90 mm long, and the coated area of the adhesive at the end after being wound into a headband shape was also 10 mm wide. × 90 mm long. The coverage of the wound label in the labeled bottle was 67%.

[Examples 2 to 7]
A thermoplastic resin film was produced in the same manner as in Example 1 except that the compounding ratio of the compounds (a) to (c), the thickness of each layer, the coverage, and the like were changed as described in Table 1, and this was used. The production of the rolled label and the attachment to the container were performed.

[Comparative Example 1]
An evaluation described later was performed without attaching a label to the same PET bottle as in Example 1.

[Comparative Example 2]
A rolled label was produced and mounted on a container in the same manner as in Example 1 except that a polypropylene film “FOS # 50” (thickness: 50 μm) manufactured by Futamura Chemical Co., Ltd. was used as the thermoplastic resin film.

<Measurement of porosity>
A part of the thermoplastic resin film obtained in Examples 1 to 7 and a part of the thermoplastic resin film used in Comparative Example 2 were cut out, embedded in an epoxy resin and solidified, and then subjected to measurement using a microtome. The film was cut perpendicularly to the plane direction of the film, and was affixed to an observation sample stand such that the cut surface was the observation surface. Gold was vapor-deposited on the observation surface, holes of each film were observed with an electron microscope at a magnification of 500 times, and the observed area was captured as image data. Image processing is performed on the obtained image data using an image analyzer (Model Luzex IID) manufactured by NIRECO CORPORATION, and a fixed area of the film (the vertical is the thickness of the thermoplastic resin film to be measured, and the horizontal is 190 μm). The area ratio (%) of the void portion in the rectangular region) was determined.
The above-described measurement was performed at arbitrary 10 locations in the thickness direction of the thermoplastic resin film, and the measured values were averaged to obtain the porosity (%) of the thermoplastic resin film.

<Temperature retention evaluation 1>
(Measurement of change in water temperature)
The labeled bottles obtained in Examples and Comparative Examples were filled with hot water of 60 ° C. in a room adjusted to 20 ° C., and the water temperature in the bottles after 30 minutes was measured. Based on the water temperature in the bottle of Comparative Example 1, the water temperatures in the labeled bottles obtained in each of the Examples and Comparative Examples were relatively compared. Table 1 shows the results.

(Measurement of label surface temperature)
In a room controlled at 20 ° C., the labeled bottles obtained in Examples and Comparative Examples were filled with hot water of 60 ° C., and the label surface temperature when the water temperature dropped to 55 ° C. was measured using a thermography camera ( It was measured by FLIR “CPA-E50”). Table 1 shows the results.

The following raw materials are the details of the raw materials described in Table 1.
<Raw materials>
-Novatec PP FY4 (trade name): manufactured by Nippon Polypropylene Co., Ltd., polypropylene homopolymer, melt flow rate (MFR) 5 g / 10 min (230 ° C, 2.16 kg load), melting point 164 ° C (DSC peak temperature)
Novatec HD HJ360 (trade name): manufactured by Nippon Polypropylene Co., Ltd., ethylene homopolymer (high-density polyethylene), MFR 5.5 g / 10 min (230 ° C, 2.16 kg load), melting point 132 ° C (DSC peak temperature)
Softon 1800 (trade name): manufactured by Bihoku Powder Chemical Industry Co., Ltd., heavy calcium carbonate, dry-ground calcium carbonate having an average particle size of 1.25 μm as measured by an air permeation method.

[Examples 8, 9 and Reference Example 1]
A thermoplastic resin film was produced and used in the same manner as in Example 1 except that the compounding ratios of the compounds (a) to (c), the thickness of each layer, the coverage, and the like were changed as described in Table 2. The production of the rolled label and the attachment to the container were performed.

[Comparative Example 3]
An evaluation described later was performed without attaching a label to the same PET bottle as in Example 1.

<Temperature retention evaluation 2>
In a room controlled at 20 ° C., the labeled bottles obtained in Examples and Comparative Examples were filled with hot water of 60 ° C., and after the temperature of the contents had dropped to 55 ° C., it further dropped to 44 ° C. The time (minutes) required to perform the measurement and the temperature (° C.) after 30 minutes were measured. Table 2 shows the results.

REFERENCE SIGNS LIST 1 roll label 2 start end 3 end 4 tab 10 bottle-shaped container 20 with label bottle-shaped container

INDUSTRIAL APPLICABILITY The present invention can be used for a wound label to be mounted by being wound around the surface of an article, and an article such as a container provided with the wound label. Especially used on the surface of containers for water, soft drinks, carbonated drinks, juices, milk drinks, lactic acid drinks, beer, wine, sake, various spirits, nutritional drinks, seasonings, medical drugs, cosmetics, chemicals, etc. The main purpose is to display various information such as a product name.

Claims (8)

It is a band-shaped label, it is a winding label that becomes a headband shape by winding the band-shaped label, overlapping the end portion on the start end portion and bonding it,
It has a surface layer (C) and a base material layer (A) in this order from the radially outer side to the inner side of the wound label when the headband shape is formed,
Both the surface layer (C) and the base material layer (A) are porous films containing a thermoplastic resin,
The thickness of the wound label is 50 to 200 μm,
Rolled label. The porosity of the wound label is 10 to 50%,
The wound label according to claim 1. The ratio of the thickness of the base material layer (A) to the thickness of all the layers of the wound label is 30 to 80%,
The wound label according to claim 1. The base material layer (A) contains 20 to 100% by mass of the thermoplastic resin and at least one of 0 to 80% by mass of the inorganic fine powder (D1) and 0 to 50% by mass of the organic filler (D2). ,
A wound label according to claim 1. The surface layer (C) contains 20 to 100% by mass of the thermoplastic resin and at least one of 0 to 80% by mass of the inorganic fine powder (D1) and 0 to 50% by mass of the organic filler (D2).
The wound label according to any one of claims 1 to 4. The average particle diameter of the inorganic fine powder (D1) and the organic filler (D2) is 0.1 to 20 μm,
The wound label according to claim 4 or 5. A labeled bottle-shaped container having a label attached to an outer peripheral surface thereof,
The label is formed by winding the wound label according to any one of claims 1 to 6 along the outer peripheral surface of the bottle-shaped container, and overlapping and terminating an end portion on a start end portion of the rolled label, thereby forming a headband. Label attached in a shape,
The coverage of the wound label on the outer peripheral surface of the labeled bottle-shaped container is 50% or more.
Bottled container with label. The labeled bottle-shaped container is a beverage container,
A labeled bottle-shaped container according to claim 7.

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