WO2014115535A1 - Base paper-equipped packaging body, and manufacturing method therefor - Google Patents

Abstract

The present invention provides a base paper-equipped packaging body with which, in shrink film packaging, the range of articles to be packaged with the base paper-equipped packaging body can be expanded. Also provided is a manufacturing method for the base paper-equipped packaging body. This base paper-equipped packaging body (1) is provided with a base paper (12), an article (20) packaged using a thermally-contracted film (11), and an adhesive layer (13) for bonding the thermally contracted film (11) and the base paper (12). As the adhesive layer (13), used is a foaming hot melt adhesive layer in which air bubbles are included in a hot melt adhesive obtained by reversibly repeating heat melting and hardening.

Description

Packaging with mount and method for manufacturing the same

The present invention relates to a package with a mount and a manufacturing method thereof. More specifically, the present invention relates to a package with a mount formed using a hot melt adhesive and a method for manufacturing the same.

Conventionally, blister packaging has been frequently used as a packaging form. Blister packaging heats and softens a thin thermoplastic resin plate, accommodates the article in a relatively hard transparent plastic molded to match the shape of the article, and puts the plastic on the mount on which the article name and article information are printed It is the packaging form which affixes. Because of transparent packaging, there is an advantage that the contents can be visually confirmed while packaging the article. However, in recent years, attention has been focused on shrink film packaging as a packaging form that replaces blister packaging from the viewpoint of reducing CO ₂ emissions from packaging materials and reducing the volume of garbage.

As a manufacturing method of shrink film packaging, for example, in Patent Document 1, (a) a board supply step for supplying a single board onto the conveyor one by one, (b) a plate roll on the surface of the board that is supplied and conveyed on the conveyor And (c) cylindrical film sticking for supplying and sticking a tubular film that can be heat-shrinkable to the backing sheet coated with the adhesive one by one. A method of manufacturing a mount with shrink film (mount with mount capable of heat shrinking) through a process is disclosed. Patent Document 2 proposes a method of manufacturing a mount with shrink film (mount with mount capable of heat shrinking) that can arbitrarily change the shape of the mount.

In Patent Document 3, in order to provide a mount with a shrink film that is easy to position and does not cause wrinkles or corners (horns) after shrink, so as to close a part of the upper end opening or lower end opening of the shrink film, The structure which provides a positioning adhesion part is disclosed. In this document, as a method for fixing the shrink film to the mount, fixing methods other than pressure-sensitive adhesives, hot melt adhesives, reactive hot melt adhesives, and adhesives are mentioned. From the viewpoint of heat resistance, “hot melt adhesives” "Reactive hot melt adhesive" is superior to "." The “hot melt adhesive” in this specification refers to a non-reactive hot melt adhesive and is distinguished from a reactive hot melt adhesive.

As an adhesive for bonding a shrink film and a mount, Patent Document 4 discloses an aqueous emulsion adhesive, a hot melt adhesive, and a reactive hot melt that are commonly used in the manufacture of paper containers and called glue. The use of an adhesive is described. Moreover, in patent document 5, the method of manufacturing a package body with a mount using the molten reactive hot-melt-adhesive is disclosed.

In FIG. 7, the conceptual diagram which plotted the adhesive strength with respect to the elapsed time after application | coating of the urethane type reactive hot melt adhesive of a nonpatent literature 1 is shown (FIG. 3 of the literature). A solid line (RHM) in the figure is a urethane-based reactive hot melt adhesive, a dotted line having a large size indicates a hot melt adhesive, and a dotted line having a small size indicates a reactive adhesive. This document describes that the time required for solidification of the reactive hot melt adhesive is usually within a few seconds to 1 minute, and 1 to 3 days are required for complete curing by moisture. In the same document, a reactive hot melt adhesive is cured by moisture in the air and becomes a three-dimensional network structure like a reactive adhesive. Therefore, the advantages of the hot melt adhesive and the reactive adhesive It describes that it has both advantages.
As cited in Patent Document 3, the active use of reactive hot melt adhesives is taught, and there is a great expectation for the use of reactive hot melt adhesives that excel in heat resistance. Various studies have been vigorously made on the agents.

Although different from the technology related to the package with the mount, Patent Document 6 discloses a technology related to a heat insulating container for food, and discloses the use of a foamed hot melt adhesive for the rib. Moreover, in patent document 7, the foaming hot-melt manufacturing apparatus is disclosed.

JP-A-8-244832 JP-A-11-208715 JP 2012-188127 A JP 2012-166659 A JP 2012-121590 A JP 2000-344280 A JP 09-173917 A

According to the shrink film packaging, as described above, since the cost reduction, volume reduction, CO ₂ reduction derived from the packaging material, and the like can be realized as compared with the blister packaging, its use is increasing in recent years. However, in blister packaging, the shape of the article is not a problem at the time of joining because the article is housed in plastic molded according to the shape of the article and the edge of the plastic is joined to the mount with an adhesive. In shrink film packaging, since the article and the mount are fixed through the adhesive layer and the heat-shrinked film (heat-shrinked shrink film), the shape of the article greatly affects the bonding. In other words, blister packaging is superior to shrink film packaging in that there are many objects of articles to be packaged, and in shrink film packaging, a technique that can expand the scope of applicable articles is required. It was.

The present invention has been made in view of the above-described background, and its object is to provide a package with a mount capable of expanding the object of an article to be packaged in a shrink film packaging and a method for manufacturing the same. It is to be.

As a result of extensive studies by the present inventors, it has been found that the problems of the present invention can be solved in the following modes, and the present invention has been completed. That is, the package with a mount according to the present invention is a package with a mount comprising a mount, an article packaged with a heat-shrinkable film, and an adhesive layer that joins the heat-shrinkable film and the mount. And the said adhesive bond layer consists of a foaming hot-melt-adhesive adhesive layer which contains a bubble in the hot-melt-adhesive which can reversibly repeat fusion | melting and solidification with a heat | fever.

The reactive hot melt adhesive strongly taught in the cited document 3 is excellent from the viewpoint of heat resistance, but immediately after the shrink film and the backing sheet are bonded together, the cohesive force as the adhesive layer is small, and the curing reaction As the value proceeds, the cohesive force gradually increases. For example, in the case of a moisture curable reactive hot melt adhesive, it takes about 1 to 3 days to cure (see Non-Patent Document 1). For this reason, the bonding position may be shifted immediately after bonding, and it is necessary to leave it in a state avoiding a load and friction so as not to cause a position shift until the completion of curing.
On the other hand, according to the packaging body with a mount according to the present invention, the foamed hot-melt adhesive layer is used as the adhesive layer, so that it quickly solidifies after being attached. Accordingly, no curing time is required, and since the cohesive force as the adhesive layer is sufficiently large immediately after curing, no special handling is required. Further, according to the package with a mount according to the present invention, since the foamed hot melt adhesive layer is used as the adhesive layer, the elasticity of the adhesive layer is increased as compared with the unfoamed adhesive layer, The followability between the adhesive layer, the article to be joined (heat-shrinked film or mount), and the article can be improved. Since the adhesive layer becomes rich in elasticity, for example, even a hard adhesive having excellent heat resistance can be improved in elasticity by foaming and hardly cracked at low temperatures. Further, by increasing the followability, for example, even when there are minute irregularities or curved surfaces on the surface of the article, the contact area with the bonded portion can be increased and the adhesive force can be improved. Therefore, it is possible to provide a package with a mount that can expand the object of the article to be packaged.

In a preferred embodiment of the package with a mount of the present invention, there is an embodiment in which the melt viscosity of the hot melt adhesive in a state not including air bubbles is 1,000 mPa · s or more and 50,000 mPa · s or less. Here, the “state not including bubbles” means that before the foaming process is performed, and bubbles contained in a very small amount before the foaming process are referred to as “states not including bubbles”.
Moreover, in a preferable aspect of the packaging body with a mount of the present invention, there is an aspect in which the expansion ratio obtained from the following formula (1) in the foamed hot melt adhesive layer is 1.1 or more and 10 or less.
<Number _{1> V} 1 _/ V 2 ··· formula (1)
In the formula, V ₁ is the volume of the foamed hot melt adhesive layer recovered from the package with mount, and V ₂ is obtained by heating and melting the foam hot melt adhesive layer recovered from the package with mount. The volume after defoaming.
Further, in a preferred embodiment of the package with a mount of the present invention, the film package article which is the article packaged with the heat-shrinkable film is attached to the mount using the foamed hot melt adhesive layer. There is an aspect that

The manufacturing method of the packaging body with mount of the 1st aspect which concerns on this invention is the board | substrate, the article packaged with the heat-shrinked film, the foaming hot-melt-adhesive layer which joins the said heat-shrinkable film and the said mount, A process for producing a package with a mount comprising the steps of: covering the article with a heat-shrinkable film, heat-shrinking the film, and reversibly repeating melting and solidification by heat An adhesive is prepared, and a foamed hot-melt adhesive is formed on at least one of the mount and the heat-shrinkable film by forming a foamed hot-melt adhesive by adding bubbles to the hot-melt adhesive. And a joining step of joining the mount and the heat-shrinked film with the foamed hot melt adhesive layer interposed therebetween.

According to the second aspect of the present invention, there is provided a method for manufacturing a package with a mount, comprising: a mount; an article packaged with a heat-shrinkable film; and a foamed hot melt adhesive layer that joins the heat-shrinkable film and the mount. A hot melt adhesive capable of reversibly repeating melting and solidification with heat is prepared, and bubbles are included in the hot melt adhesive to produce foam hot melt adhesive. Forming an agent; and forming a foamed hot melt adhesive layer using the foamed hot melt adhesive on at least one of the mountable film and the heat shrinkable film before shrinking the thermally contracted film; Bonding the mount and the heat-shrinkable film with the foamed hot melt adhesive layer interposed therebetween, and a bonding step for obtaining a heat-shrinkable film-mounted mount; And coated with a film capable of the heat shrinkage, and a step of the film to heat shrink.

Moreover, in one preferable aspect of the manufacturing method of the package with a mount according to the first aspect or the second aspect of the present invention, the melt viscosity in a state of not containing air bubbles of the hot melt adhesive is 1,000 mPa · s or more. , 50,000 mPa · s or less.
Moreover, in one preferable aspect of the manufacturing method of the package with a mount according to the first aspect or the second aspect of the present invention, the expansion ratio obtained from the formula (2) of the foamed hot melt adhesive is 1.1 or more. There are 10 or less embodiments.
<Equation 2> V ₃ / V ₄ Formula (2)
In the formula, V ₃ is a mass per 100 cc of the hot melt adhesive before foaming, and V ₄ is a mass per 100 cc of the foamed hot melt adhesive.

Moreover, in one preferable aspect of the manufacturing method of the package with a mount according to the first aspect or the second aspect of the present invention, the joining step is continuously performed while maintaining the molten state of the foamed hot melt adhesive. There are aspects.

According to the present invention, in shrink film packaging, there is an excellent effect that it is possible to provide a package with a mount that can expand the object of an article to be packaged and a manufacturing method thereof.

Schematic explanatory drawing which shows an example of the package body with mount which concerns on 1st Embodiment. FIG. 1B is a cross-sectional view taken along the line IB-IB in FIG. 1A. The typical explanatory view showing the manufacturing method of the packing object with mount concerning a 1st embodiment. The typical explanatory view showing the manufacturing method of the packing object with mount concerning a 1st embodiment. The typical explanatory view showing the manufacturing method of the packing object with mount concerning a 1st embodiment. The flowchart figure of 1st or 2nd embodiment in the manufacturing method of the package with a mount. Schematic explanatory drawing which shows an example of the package body with the mount which concerns on 2nd Embodiment. 4B is a cross-sectional view taken along the line IVB-IVB in FIG. 4A. Schematic explanatory drawing which shows the manufacturing method of the package body with mount in 3rd Embodiment. Schematic explanatory drawing which shows the manufacturing method of the package body with mount in 3rd Embodiment. Schematic explanatory drawing which shows the manufacturing method of the package body with mount in 3rd Embodiment. The flowchart figure of 3rd or 4th embodiment in the manufacturing method of the package body with mount. The conceptual diagram which plotted the adhesive strength with respect to the elapsed time after application | coating of the reactive hot melt adhesive of a nonpatent literature 1. FIG.

The packaging body with a mount according to the present invention is obtained by bonding a heat-shrinkable film formed by wrapping an article and the mount with an adhesive layer interposed therebetween. This adhesive layer is a foamed hot-melt adhesive layer made of a hot-melt adhesive that can reversibly repeat melting and solidification by heat and contains bubbles. Hereinafter, specific embodiments of the package with mount and the method for manufacturing the same according to the present invention will be described. Needless to say, other embodiments are also included in the scope of the present invention as long as they meet the spirit of the present invention. Further, matters other than matters specifically mentioned in the present specification and necessary for the implementation of the present invention can be grasped as design matters for those skilled in the art based on the prior art in this field. Further, the following embodiments are preferably combined with each other.

[First Embodiment]
FIG. 1A is a schematic explanatory view of a package with a mount according to the first embodiment, and FIG. 1B is a sectional view taken along the line IB-IB in FIG. 1A. The packaging body 1 with the mount is a packaging article in which the film packaging article 21 is attached to the mount 12 with the adhesive layer 13 interposed therebetween, and the heat-shrinkable film 11 is bonded to the mount 12 with the adhesive layer 13 interposed therebetween. It is a thing. The packaging body 1 with a mount may have other members without departing from the gist of the present invention. For example, a cushion material for protecting the product from impact, a heat insulating member for protecting the article from heat at the time of forming the adhesive layer 13, a heat radiating member, and the like can be exemplified. The adhesive layer 13 is for bonding the heat-shrinkable film 11 and the mount 12, but the heat-shrinkable film 11 and the mount 12 are not limited to those directly bonded to the adhesive layer 13, A mode in which the adhesive layer 13 is joined via a member such as another sheet formed integrally with the heat-shrinkable film 11 and / or the mount 12 is also included.

The heat-shrinked film 11 plays a role of covering at least a part of the article 20 and packaging the article 20, and is a film obtained by heat-shrinking a so-called shrink film. As in the example of FIG. 1A, the heat shrinkable film 11 can be used to wrap the entire side portion of the article 20, wrap only the central portion of the article in a strip shape, or wrap the entire article. The heat-shrinkable film 11 is preferably colorless and transparent or colored and transparent so that the state of the packaged article can be confirmed, but may be non-transparent. The heat-shrinkable film 11 may be printed with visible character information or the like, or may be printed with various images.

The heat-shrinkable film 11 may be any film that is heat-shrinkable from a heat-shrinkable film such as a stretched film, and any commonly used film can be used without limitation. For example, polystyrene, polyethylene, polypropylene, and polyvinyl chloride can be exemplified. In addition, a polylactic acid-based thermoplastic resin (polyester resin or the like) is also suitable as an environmentally friendly biodegradable film. The heat-shrinkable film 11 may be provided with a perforation 15 as shown in FIG. 1A or an opening 16 formed with two or more rows of perforations according to needs.

The mount 12 mainly plays a role as a base material for packaging the article 20 and a role as an information providing unit such as an article name and article information. The mount 12 may be provided with a hanging hole 14 or the like as a display means for the article 20. The material of the mount 12 is not particularly limited as long as the material does not deform when the article 20 is pasted. Preferable examples include polyester films, nylon films, vinylidene chloride, polyolefin films such as polyethylene and polypropylene, or plastic sheets made of laminates thereof, paper, metal sheets, composite sheets made of composite materials, and laminates thereof. The body can be exemplified. For example, a laminate of a plastic film and an aluminum foil may be used. What is necessary is just to select suitably the thickness, raw material, etc. of the base_sheet | mounting_paper 12 according to the mass, size, etc. of the articles | goods 20. FIG. In addition to the flat plate shape, the mount 12 may have a curved surface shape, a bent shape, or the like. Also, an L-shaped or U-shaped mount may be used. Furthermore, in order to make it easy to take out the article 20 from the package 1 with the mount, a perforation or an opening may be provided in a contact portion with the article 20 on the back side of the mount 12 or in the vicinity thereof.

The adhesive layer 13 plays a role of bonding the heat-shrinkable film 11 and the mount 12, and bubbles are contained in a hot-melt adhesive exhibiting high-melting thermoplasticity that can reversibly repeat melting and solidification by heat. A foamed hot melt adhesive layer. The adhesive layer 13 used in the present invention is solid at room temperature, can be melted by heating, and can be applied to the bonded portion, and is solidified by returning the bonded portion to the normal temperature after application to be bonded to the bonded portion. It demonstrates its power. That is, the adhesive used for the adhesive layer 13 of the present invention is a post-treatment step for bonding (an aging treatment or UV treatment for advancing curing by moisture or heat) after bonding the heat-shrinkable film 11 and the mount 12. It is different from a reactive hot melt adhesive that requires a curing treatment or the like, or an adhesive called a high viscosity type so-called sealant. The adhesive layer 13 may be a pressure sensitive adhesive layer.

The hot melt adhesive used in the present invention contains at least a thermoplastic resin and a tackifying resin. The hot melt adhesive preferably contains a wax. In addition, hot melt adhesives include fillers, softeners, plasticizers, colorants, antiblocking agents, antioxidants, UV absorbers, silane coupling agents, thixotropic agents, foaming agents, etc. Can be contained. The hot melt adhesive preferably contains no solvent. The material of the hot melt adhesive is not particularly limited as long as it does not depart from the gist of the present invention, but the following examples can be given as preferable examples.

Examples of the thermoplastic resin include hot-melt adhesives such as styrene polymers, ethylene vinyl acetate (EVA), ethylene-unsaturated ester copolymers, polyamides, polyesters, and polyolefins. These may be block copolymers. Styrene polymers include styrene-ethylene-butylene-styrene block polymer (SEBS), styrene-ethylene-propylene-styrene block polymer (SEPS), styrene-isoprene-styrene block polymer (SIS), styrene-butylene-butadiene-styrene. A block polymer (SBBS) etc. can be illustrated. A thermoplastic resin can be used individually or in combination of 2 or more types.

The MFR (JIS K7210, 200 ° C./5 kg) of the thermoplastic resin used is preferably 0.01 to 100 g (including lower limit value and upper limit value, the same applies hereinafter). By making MRF 100 g or less, it becomes easy to balance heat resistance and adhesiveness when a hot melt adhesive is prepared by adding other components. On the other hand, it becomes easy to maintain the adhesiveness in a low-temperature atmosphere by making MFR 0.01g or more. In the present invention, the MFR is the mass of the thermoplastic resin obtained as a condition (temperature 200 ° C., weight 5 kg) by the method defined in JIS K7210. A more preferable range of MFR of the thermoplastic resin is 0.1 to 80 g, and a more preferable range is 1 to 70 g.

Examples of the tackifying resin include phenol resin, modified phenol resin, terpene phenol resin, xylene phenol resin, cyclopentadiene-phenol resin, and xylene resin. Also suitable are aliphatic, alicyclic and aromatic petroleum resins; hydrogenated aliphatic, alicyclic and aromatic petroleum resins; and phenol-modified petroleum resins. is there. Also suitable are rosin resins such as rosin ester resins and hydrogenated rosin ester resins. Further examples include low molecular weight polystyrene resins, terpene resins, hydrogenated terpene resins, and the like. Tackifying resins can be used alone or in combination of two or more.
The softening point of the tackifying resin used is preferably 80 to 160 ° C. By setting the softening point to 80 ° C. or higher, the bubbles in the hot-melt adhesive after foaming can be prevented from being crushed even at high temperatures, and the adhesive force can be improved. On the other hand, by setting the softening point to 160 ° C. or lower, it is possible to improve the tackiness in a low-temperature atmosphere and to maintain good adhesion. In the present invention, the softening point is a temperature determined by a method defined in JIS K 6863. A more preferable range of the softening point of the tackifier is 90 to 140 ° C., and a more preferable range is 100 to 130 ° C. from the viewpoint of balancing adhesiveness, heat resistance, and cold resistance.

The waxes include carnauba wax, canderia wax, montan wax, paraffin wax, microwax, Fischer-Tropsch wax, polyethylene wax, polypropylene wax, oxides of these waxes, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer. A polymer etc. are mentioned. Waxes can be used alone or in combination of two or more. The melt viscosity at 150 ° C. of the wax is preferably 10 to 2,000 mPa · s, more preferably 15 to 1,000 mPa · s, and still more preferably 15 to 500 mPa · s. By using the wax, the viscosity of the hot melt adhesive can be lowered and coating can be facilitated.
The softening point of the wax used is preferably 70 to 120 ° C. When the softening point is 70 ° C. or higher, there is no possibility that the wax melts at a high temperature and the adhesive strength is reduced. On the other hand, by setting the softening point to 120 ° C. or lower, the temperature at which the hot melt is melted by heating is lowered, so that the hot melt coating property can be secured. In the present invention, the softening point is a temperature determined by a method defined in JIS K 6863. A more preferable range of the softening point of the thermoplastic resin is 80 to 140 ° C, and a more preferable range is 90 to 130 ° C.

Examples of the colorant include titanium oxide.
Examples of the antiblocking agent include silicone, unsaturated fatty acid amides such as erucic acid amide and oleic acid amide, and saturated fatty acid amides such as stearic acid amide and behenic acid amide.
Antioxidants include high molecular weight hindered polyphenols, triazine derivatives, high molecular weight hindered phenols, dialkyl phenol sulfides, 2,2-methylene-bis- (4-methyl-6-tert-butylphenol), 4 , 4-methylene-bis- (2,6-di-tert-butylphenol), 2,6-di-tert-butylphenol-p-cresol, 2,5-di-tert-butylhydroquinone, 2,2 , 4-trimethyl-1,2-dihydroquinone, 2,2,4-trimethyl-1,2-dihydroquinone, nickel dibutyl dithiocarbamate, 1-oxy-3-methyl-4-isopropylbenzene, 4,4- Examples include butylidenebis- (3-methyl-6-tert-butylphenol), 2-mercaptobenzimidazole and the like.

The hot melt adhesive used in the present invention is preferably in the range of 30 to 80 parts by mass of the thermoplastic resin from the viewpoint of improving heat resistance in 100 parts by mass of the hot melt adhesive, from the viewpoint of improving the adhesive force. It is preferable that the tackifying resin is contained in the range of 40 to 80 parts by mass. Moreover, it is preferable to use a wax from a viewpoint of adjusting a viscosity appropriately.

The softening point of the hot melt adhesive used in the present invention may vary depending on the use environment temperature, but it is preferably 80 to 160 ° C. in consideration of outdoor use. When the softening point is 80 ° C. or higher, it becomes easy to balance the adhesive force and the cohesive force. On the other hand, by setting the softening point to 160 ° C. or lower, it becomes easy to maintain tack even in a low temperature atmosphere. In the present invention, the softening point is a temperature determined by a method defined in JIS K 6686. A more preferable range of the softening point of the hot melt adhesive of the present invention is 90 to 140 ° C, and a more preferable range is 100 to 130 ° C.

The expansion ratio obtained from the following formula (1) of the adhesive layer 13 is preferably in the range of 1.1 to 10 from the viewpoint of effectively maintaining the adhesive strength and followability. By setting it as the said range, the adhesiveness and followability at the time of high temperature use can be pulled out more effectively. More preferably, it is 1.5-5, and still more preferably 1.5-3.
<Number _{3> V} 1 _/ V 2 ··· formula (1)
In the formula, V ₁ is the volume of the foamed hot-melt adhesive layer recovered from the packaging body with the mount, and V ₂ is after the foamed hot-melt adhesive layer recovered from the packaging body with the heating is melted and defoamed Of the volume.
For example, it can be calculated by collecting the foamed hot-melt adhesive layer per 1 cm ² and determining the volume, and then determining the volume of the adhesive after melting by heating and completely defoaming the foam. The volume of the adhesive after recovery and after defoaming can be determined using a measuring instrument such as a specific gravity bottle that measures the porosity of the powder. In other words, an arbitrary amount of hot melt adhesive is isolated, hot melt adhesive is put into a measuring instrument whose container volume is known, the mass is weighed, and the difference from the mass with water so that there is no void, The hot melt volume can be determined based on the water specific gravity.

The article 20 is not particularly limited as long as it is suitable for packaging with the heat-shrinkable film 11. For example, cosmetics, medicines, foods, batteries, toys, clothing, stationery items, miscellaneous goods and the like can be exemplified. The number of articles 20 to be packaged may be singular or plural. Moreover, the purpose of packaging can be used for various purposes such as transportation packaging as well as a mode of displaying products as a storefront.

Next, an example of a method for manufacturing a package with mount according to the first embodiment will be described with reference to FIGS. 2A to 2C and FIG. In the method for manufacturing a package with a mount according to the first embodiment, the article 20 is covered with a heat-shrinkable film 10, and the heat-shrinkable film 10 is heated and packaged with a heat-shrinkable film 11. Is manufactured, and is bonded to the mount 12 via the adhesive layer 13. Details will be described below.

First, the article 20 is packaged with a film 10 that can be heat-shrinked, and a film-packaging article 21 packaged with the film 11 that has been heat-shrinked is obtained (step 1). In the example of FIGS. 2A-2C, an article 20 is inserted into a cylindrical heat-shrinkable film 10 (see FIG. 2A), and then the heat-shrinkable film is heated to produce a heat-shrinkable film. The film 11 that has been shrunk and thermally shrunk to the article 20 is fitted (adhered) (see FIG. 2B). A conventionally used method can be arbitrarily applied as the method for heating and shrinking the heat-shrinkable film 10. By these steps, the film packaging article 21 covered with the heat-shrinked film 11 is obtained. The film 10 that can be heat-shrinkable may be individually cut in advance, or the heat-shrinkable film 10 wound up in a roll shape may be cut immediately before heat shrinkage.

The heat-shrinkable film 10 is prepared with a desired size and shape by forming printing, perforations 15, slits, signatures, opening 16 and the like as necessary. Moreover, the film 10 which can be thermally contracted is selected so that the contraction rate differs depending on the direction, if necessary. Note that the example of FIG. 2A and the like is an example, and various modifications are possible. For example, the sheet-like heat-shrinkable film 10 may be wound around the article 20 and the overlapping portions may be joined with an adhesive. Alternatively, the sheet-like heat-shrinkable film 10 may be used as it is without using an adhesive, or the string-like heat-shrinkable film 10 may be wound around the article 20. As a method of using the sheet-like heat-shrinkable film 10 as it is, for example, the side periphery (body part) of the article 20 is wound one or more times with the film 10 that can be heat-shrinked, heated quickly, and can be heat-shrinked. Can be exemplified by a method in which the film 11 subjected to heat shrinkage is fitted (adhered) to the article 20. The same method can be illustrated also in the case of the film | membrane 10 which can carry out the heat shrink of the string shape.

The production of the film wrapping article 21 may be performed in the process of producing the packaging body 1 with a mount, or may be packaged simultaneously with the completion of the product in a factory or the like for producing the article 20. When packaging at the same time as the product is completed, the goods can be properly protected during transportation and storage.

Next, an adhesive layer 13 is formed on the mount 12 and / or the heat-shrinked film 11 (step 2). In the first embodiment, an example in which the adhesive layer 13 is formed on the mount 12 will be described. The mount 12 forms printing, decoration, hanging holes 14 and the like as necessary. On the mount 12 side, a perforation for facilitating taking out the article 20, a cut for opening, or the like may be provided. The mount 12 may be cut in advance for each product, or may be cut before and after applying the adhesive. Further, it is possible to separate the mount 12 at the final stage after the film packaging article 21 is attached. From the viewpoint of increasing the efficiency of the manufacturing process, a method of winding the mount 12 in a roll shape and cutting in the process of manufacturing the package 1 with the mount can be exemplified.

As described above, the adhesive layer 13 includes a foamed hot melt adhesive layer containing bubbles in a hot melt adhesive that can reversibly repeat melting and solidification by heat. The timing for foaming the hot melt adhesive is not particularly limited, but from the viewpoint of improving productivity and managing the quality with high accuracy, the hot melt adhesive is hot immediately before forming the adhesive layer 13, at the time of coating, or immediately after coating. It is preferred to foam the melt adhesive. Among these, foaming is more preferable immediately before coating or at the time of coating. The adhesive layer 13 is obtained by applying a molten hot melt adhesive to a predetermined position of the mount 12.

The method and apparatus for incorporating air bubbles into the hot melt adhesive are not particularly limited, but a method of foaming the hot melt adhesive by blowing a gas is suitable. Further, a heat decomposable foaming agent may be added to the hot melt adhesive so that fine bubbles are generated when the adhesive layer 13 is formed.

For example, a device for blowing a gas into a hot melt adhesive and foaming it includes, for example, a heated stirring container that melts and heats the hot melt adhesive under normal pressure or pressure, and a volatile substance that introduces a volatile substance such as a gas into the heated stirring container. The agitation conditions (number of revolutions, etc.) according to the viscosity of the hot melt adhesive, etc., the substance supply means, the sensor for monitoring the temperature and viscosity in the heated stirring container, the stirring means provided in the heated stirring container An apparatus having a controllable control unit can be exemplified. Although a volatile substance is not specifically limited, Inert gas, such as nitrogen and argon, can be illustrated and nitrogen can be used conveniently.
Moreover, you may use the gas which interacts between the component of an adhesive agent, and a molecule | numerator, and can hold | maintain inside an adhesive bond layer. Depending on the type of the adhesive layer, carbon dioxide can be exemplified as such an example. The gas may be introduced at normal pressure, but it is efficient to carry out under pressure. It is also possible to use supercritical carbon dioxide or the like.

From the viewpoint of efficiently introducing bubbles, the melt viscosity of the hot melt adhesive when the gas is blown is preferably within the range of 1,000 to 50,000 mPa · s, more preferably 5,000. It is in the range of ˜20,000 mPa · s, particularly preferably in the range of 5,000 to 15,000 mPa · s. The foaming temperature depends on the type of hot-melt adhesive used, but is usually 120 to 180 ° C., preferably 120 to 150 ° C. After forming the foamed hot melt adhesive, it is usually returned to room temperature. Thereby, an adhesive agent solidifies and a foaming part is also fixed.

The appropriate foaming ratio of the hot melt adhesive can vary depending on the application and needs, and can be arbitrarily set. From the viewpoint of enhancing versatility with respect to the shape of the article, the mass ratio when filling a 100 cc container in a molten state is preferably in the range of 1.1 to 10 in the following formula (2). More preferably, it is 1.5 to 5, particularly preferably 1.5 to 3.
<Equation 4> V ₃ / V ₄ Formula (2)
In the formula, V ₃ is the mass of 100 cc of the unfoamed hot melt adhesive, and V ₄ is the mass of 100 cc of the foamed hot melt adhesive.

Subsequently, the film wrapping article 21 wrapped with the heat-shrinked film 11 and the mount 12 are bonded together with an adhesive layer (foamed hot melt adhesive layer) 13 interposed therebetween (step 3, see FIG. 2C). For joining, it is necessary that the melted adhesive layer 13 is in contact with the part to be joined, and then the adhesive layer 13 is solidified. Therefore, from the viewpoint of productivity, the step of forming the adhesive layer 13 in Step 2 and the step of joining the film packaging article 21 and the mount 12 in Step 3 are continued while maintaining the molten state of the adhesive layer 13. It is preferable to carry out. As a preferable example, for example, a molten adhesive is foamed and applied to a predetermined position of the mount 12 to form a molten / foamed adhesive layer 13, which is packaged with a film that is rapidly heat-shrinked while maintaining this state. An example is a method in which the adhesive layer 13 is solidified and bonded together while the foamed state is maintained by natural cooling after contacting the finished article 21.

The method for joining the film wrapping article 21 and the mount 12 is not limited to the above method, and various modifications are possible. For example, after applying a hot melt adhesive in a melted / foamed state to a predetermined position of the mount 12, the adhesive layer 13 is cooled at one end, and when the film packaging article 21 and the mount 12 are attached, the adhesive is again bonded. It is possible to heat the adhesive layer 13 to such an extent that the foamed state can be maintained, and to bond the film packaging article 21 to the melted / foamed adhesive layer 13. According to this method, it becomes possible to perform each manufacturing process of the mount 12 with the adhesive layer 13, the film packaging article 21, and the package 1 with the mount at different timings and places. Heating for melting the adhesive layer 13 for bonding the film packaging article 21 and the mount 12 may be performed from the surface of the adhesive layer 13 or from the back side or the side of the mount 12. For example, the adhesive layer 13 can be melted by hot air from the back side of the mount 12 to such an extent that the foamed state can be maintained, and the film packaging article 21 and the mount 12 can be joined. Moreover, you may heat using a lamp | ramp etc. Further, when the mount 12 is plastic, it can be performed with steam.

The adhesive layer 13 in the package 1 with mount can be visually confirmed as foamed. However, the expansion ratio is usually smaller than the value of the above-described formula (2). This is because bubbles in the adhesive layer 13 are reduced during the step of attaching the article 21 covered with the heat-shrinked film 11 and the mount 12. In addition, the bubbles may be bonded due to the mass of the article 20 or the bonding force may be stronger due to the adhesive properties of the adhesive layer 13 itself, and the bubbles may collapse and the apparent expansion ratio may decrease. is there. Therefore, the expansion ratio is somewhat smaller than the initial value in the manufacturing process and over time. As described above, the expansion ratio of the adhesive layer 13 in the packaging body 1 with the mount is in the predetermined range described above, as described above, from the viewpoint of effectively maintaining the adhesive force and the followability. It is preferable.

According to the method in which an article is inserted after the heat-shrinkable film 10 is affixed to the mount 12, and heated and converted into the heat-shrinkable film 11, an article with a particularly unbalanced shape, an article that is easy to move, There is a possibility that the position of the article 20 may shift when the article is to be packaged. On the other hand, according to the method for manufacturing a package with a mount according to the first embodiment, since the film wrapping article 21 is formed first and this is attached to the mount 12, Misalignment can be prevented. In particular, the present invention can be suitably applied to a case where the article 20 has an unbalanced shape, a movable article, or a case where a plurality of articles are desired to be packaged.

By the way, in order to improve the heat resistance of the adhesive layer, generally, an adhesive which is difficult to soften at a high temperature is used. However, when an adhesive that is difficult to soften at high temperature is used, the adhesive layer has a drawback that it is hard at low temperatures and easily cracked. In addition, when an adhesive that is difficult to soften at high temperature is used, the followability of the adhesive layer to a minute uneven surface is deteriorated, and curved surface followability is also deteriorated. In addition, in recent years, reactive hot melt adhesives that have been actively developed are bonded to a film that can be thermally shrunk through an adhesive and a backing sheet, and then the time for moisture curing and UV A curing process is required. By these curing treatments, it is possible to imagine the advantage of increasing the heat resistance by increasing the curability of the adhesive layer. However, the elastic force of the adhesive layer is reduced and the followability is reduced by the improvement in heat resistance due to curing. The decrease in followability becomes a problem particularly at low temperatures. As a means for increasing the adhesive force, there is a method of lowering the viscosity by increasing the temperature of the adhesive and improving the wettability to the heat-shrinked film or mount. However, if the adhesive is simply heated to a high temperature, thermal damage to the article cannot be ignored.

According to the packaging body 1 with the mount according to the first embodiment, the adhesive layer 13 is foamed, whereby the elasticity and the adhesive force are superior to those of the unfoamed adhesive layer. Since the adhesive layer 13 becomes rich in elasticity, even if it is a hard adhesive having excellent heat resistance, it is possible to increase elasticity by foaming and make it difficult to crack at low temperatures. Moreover, due to the improved elasticity, the followability of the adhesive layer 13 is enhanced when the backing sheet 12 and the film wrapping article 21 are bonded together, and the adhesive is applied to the fine irregularities on the surface of the backing sheet 12, the heat-shrinkable film 11 or the article. The layer 13 follows well. It is considered that the adhesive force is increased because the adhesive area between the adhesive layer 13 and the bonded portion increases.

In shrink film packaging, as described above, it is required to expand the scope of packaging articles. There are various shapes of articles to be packaged, and some of the side surfaces of the articles have a curved shape due to constriction or the like. Such a curved portion is likely to float when the film packaging article 21 and the mount 12 are joined. According to the packaging body 1 with the mount according to the first embodiment, even in the case of such an article, the bonding area is increased by pressing the constricted portion against the mount 12 by using an adhesive layer rich in elasticity. It is possible to increase the adhesive strength sufficiently. Therefore, it is possible to expand the application target of the article 20 that is a packaged object.

Also, by using the foamed adhesive layer 13, thermal damage to the article 20 can be reduced as compared with the case of using an unfoamed hot melt adhesive. This is because heat conductivity is reduced by bubbles existing in the foamed adhesive layer 13, so that heat propagation to the article 20 can be suppressed, and heating and melting can be performed by including bubbles in the adhesive layer 13. It is considered that the subsequent cooling efficiency was increased and the thermal load during the joining was reduced. That is, it is possible to improve wettability to the heat-shrinked film 11 and the mount 12 by using the adhesive layer 13 having a high temperature and low viscosity while suppressing thermal damage. Furthermore, the improvement of wettability can expand the types of articles to be packaged.

Further, according to the package with a mount according to the first embodiment, since the foamed hot melt adhesive layer is used, it is possible to reduce the specific gravity and reduce the amount of the adhesive used. As a result, although the amount per product is small, the weight is reduced, and when a large amount of products are transported, the total cost including transportation costs can be reduced. Furthermore, according to the packaging body with a mount according to the present invention, since a hot melt adhesive that can reversibly repeat melting and solidification by heat is used, the heat-shrinkable film and the mount are joined in a molten state. There is a merit that it is completed only by the step of bonding through the adhesive layer (the post-processing step is unnecessary).

[Second Embodiment]
Next, an example of the manufacturing method of the packaging body with a mount different from the said embodiment is demonstrated. The manufacturing method of the packaging body with mount according to the second embodiment is the same as the first embodiment except for the following points. That is, in the second embodiment, the adhesive layer 13 is formed on the film wrapping article 21, and the adhesive layer 13 is formed on the mount 12 at a point where the adhesive layer 13 is bonded to the mount 12. This is different from the manufacturing method of the first embodiment to be bonded.

According to the method for manufacturing a package with a mount according to the second embodiment, after obtaining the film packaging article 21 packaged with the heat-shrinkable film 11 as shown in FIG. A melted / foamed adhesive layer 13 is provided, and this is bonded to the mount 12.

According to the method of the second embodiment, the same effect as the first embodiment can be obtained. In addition, since the adhesive layer 13 is formed on the film packaging article 21, it is possible to more reliably prevent the position of the adhesive layer 13 and the joining position from being shifted when the film packaging article 21 and the mount 12 are joined. In consideration of the thermal effect on the heat-shrinkable film 11 and the article 20, the first embodiment in which the melted / foamed adhesive layer 13 is formed on the mount 12 side as shown in FIG. 2C is preferable. However, for example, as shown in FIG. 4, the method of the second embodiment is useful in cases such as when the article is narrow, such as a toothbrush, which tends to result in poor bonding due to a slight misalignment. The method of the second embodiment is also useful when it is desired to join a plurality of film packaging articles 21 on a single mount or when packaging an article having a complicated shape having a recess or the like.

[Third Embodiment]
The manufacturing method of the packaging body with mount according to the third embodiment is the same as the first embodiment except for the following points and the basic configuration and manufacturing method. That is, in the manufacturing method of the third embodiment, a board with heat-shrinkable film is manufactured, and then an article is inserted into the heat-shrinkable film 10 and then the heat-shrinkable film 10 is heat-shrinked. This is a method for producing a package with a mount. That is, the third embodiment is different from the first embodiment in that the mount 12 and the film 10 that can be thermally contracted are bonded together prior to the step of covering the article. The third embodiment will be described with reference to FIGS. 5A to 5C and FIG.

In the third embodiment, first, an adhesive layer 13 is formed on the mount 12 as shown in FIG. 5A (step 1a). As described above, the adhesive layer 13 is a foamed hot melt adhesive layer in which bubbles are included in a hot melt adhesive that can reversibly repeat melting and solidification by heat. Examples of the method for foaming the hot melt adhesive include the same method as in the first embodiment.

Thereafter, the film 10 that can be thermally shrunk by pressing the film 10 that can be thermally shrunk through the adhesive layer 13 in a melted / foamed state to a predetermined position of the mount 12 and pressed at a predetermined pressure, Are attached to obtain a film-mounted mount 2 that can be thermally contracted (see step 2a, FIG. 5B). For example, the heat-shrinkable film 10 and the mount 12 can be rolled at a desired pressure by two pressing rollers. From the viewpoint of improving the efficiency of the manufacturing process, the film 10 that can be immediately heat-shrinked in the steps 1a and 2a can be performed immediately after the adhesive layer 13 is applied while the foamed hot-melt adhesive is maintained in a molten state. And the mount 12 are preferably bonded together. 5A and 5B show a cylindrical film 10 that can be heat-shrinkable. However, as in the case of the first embodiment, for example, a sheet-like film 10 that can be heat-shrinkable is rounded into a cylindrical shape and overlapped. What joined the part with the adhesive agent can also be used.

It is preferable that the heat-shrinkable film 10 and the mount 12 are bonded together via a melted / foamed adhesive layer 13 and then cooled so that the adhesive layer 13 is solidified. The cooling may be natural cooling or forced cooling. By this step, the film 10 and the mount 12 that can be thermally contracted are bonded together, and the film-mounted mount 2 that can be thermally contracted is obtained (see FIG. 5B).

Next, an article 20 as a package is inserted into the cylindrical film 10 that can be thermally contracted (see FIG. 5C), and the film 10 that can be thermally contracted is thermally contracted. A package with a mount formed by fixing the article 21 packaged with the contracted film 11 on the mount 12 is obtained (step 3a). In addition, when the mount 12 to which the adhesive layer 13 is applied is prepared in advance and the film 10 and the mount 12 that can be thermally contracted are bonded, the adhesive layer 13 is heated and melted again to be thermally contracted with the mount 12. The resulting film 10 may be joined.

The foaming of the adhesive layer 13 in the mount 2 with a film that can be thermally contracted according to the third embodiment can be visually confirmed. However, the expansion ratio is usually smaller than the value of the above-described formula (2). This is because the adhesive layer is used in the step of attaching the film 10 that can be heat-shrinkable to the mount 12 or the film step that heat-shrinks the film 10 that can be heat-shrinked after inserting the article 20 into the film 10 that can be heat-shrinkable This is because bubbles in 13 are reduced. Further, since the bonding force becomes stronger due to the adhesive property of the adhesive layer 13 itself, the bubbles may collapse and the apparent expansion ratio may be reduced. In addition, after the article is inserted, the bubbles may join due to the mass of the article. Therefore, the expansion ratio is somewhat smaller than the initial value in the manufacturing process and over time. The expansion ratio of the adhesive layer in the film-mountable mount and the expansion ratio of the adhesive layer of the package with the mount after the article is inserted are as described above from the viewpoint of effectively maintaining the adhesive force and the followability. It is preferable that the value calculated from Equation (1) is within the predetermined range described above.

According to the packaging body with mount and the manufacturing method thereof according to the third embodiment, since the foamed hot-melt adhesive layer is used, the same effect as in the first embodiment can be obtained.

[Fourth Embodiment]
Next, an example of the manufacturing method of the packaging body with a mount different from 3rd Embodiment is demonstrated. The manufacturing method of the package with mount according to the fourth embodiment is the same as the third embodiment except for the following points. That is, in the fourth embodiment, when manufacturing a board with heat-shrinkable film, the adhesive layer 13 is formed on the heat-shrinkable film 10 and is bonded to the board 12. This is different from the manufacturing method of the third embodiment in which the adhesive layer 13 is formed on the film 10 and bonded to the film 10 that can be thermally contracted.

In the fourth embodiment, first, the adhesive layer 13 is formed on the heat-shrinkable film 10 (step 1a). Next, by attaching this to the mount 12, a mount with film that can be thermally shrunk as shown in FIG. 5B is obtained. Thereafter, as shown in FIG. 5C, the article 20 to be packaged is placed in a film 10 that can be heat-shrinked, and is heat-treated to heat-shrink the film 10 that can be heat-shrinked, thereby closely contacting the article 20. 1 can be obtained.
According to the method of the fourth embodiment, the same effect as in the third embodiment can be obtained.

<< Example >>
EXAMPLES Hereinafter, the present invention will be described specifically and in detail with reference to examples. However, these examples are only one aspect of the present invention, and the present invention is not limited to these examples. In the examples, “part” means “part by mass”, and “%” means “% by mass”.

[Production Example (Production Example of Foamed Hot Melt Adhesive)]
<Production Example 1>
A table kneader (PNV-1H manufactured by Irie Shokai) equipped with a heating device was added with 480 g of tackifying resin 1, 160 g of thermoplastic elastomer (hereinafter simply referred to as “elastomer”) 1 and 8 g of antioxidant, and 120-140 The mixture was heated and stirred at 3 ° C. for 3 hours. During stirring, the pressure was reduced by a vacuum pump to prevent thermal deterioration. After confirming that there was no undissolved residue of the elastomer, the hot melt adhesive of Production Example 1 was obtained.
<Production Examples 2 to 8>
Hot melt adhesives of Production Examples 2 to 8 were obtained in the same manner as in Production Example 1 except that the tackifier resin, elastomer type, number of parts, and stirring conditions were changed according to Table 1.

Abbreviations for tackifying resins, elastomers and antioxidants listed in Table 1 are shown below.
Tackifying resin 1: partially aromatic hydrogenated resin, softening point 100 ° C.
Tackifying resin 2: aromatic hydrogenated resin, softening point 100 ° C.
Tackifying resin 3: partially hydrogenated terpene resin, softening point 105 ° C.
Tackifying resin 4: hydrogenated terpene resin, softening point 105 ° C.
Tackifying resin 5: rosin ester, softening point 108 ° C.
Tackifying resin 6: hydrogenated rosin ester, softening point 105 ° C.
Elastomer 1: Styrene-isoprene-styrene copolymer MFR 15 g / 10 min (JISK7210 200 ° C / 10 kg)
Elastomer 2: Styrene-ethylene / polyisoprene-styrene copolymer MFR 100 g / 10 min (JISK7210 200 ° C / 10 kg)
Elastomer 3: Styrene-butadiene-styrene copolymer MFR 20g / 10min (JISK7210 200 ° C / 5kg)
Elastomer 4: Styrene-ethylene / butylene-styrene copolymer MFR 8 g / 10 min (JISK7210 200 ° C / 5 kg)
Elastomer 5: Styrene-isoprene / butadiene-styrene copolymer MFR 11 g / 10 min (JISK7210 200 ° C / 5 kg)
Elastomer 6: Styrene-hydrogenated poly (isoprene / butadiene) -styrene copolymer MFR <0.1 g / 10 min (JISK7210 200 ° C / 10 kg)
Antioxidant: phosphorus processing stabilizer + hindered phenol antioxidant, density 1.1 g / cm ² (20 ° C.)

<Softening point>
It was measured by the ring and ball method. Samples were packed into a regular ring and held horizontally in a glycerin bath. When a specified sphere (JIS B 1501) is placed in the center of the sample, the temperature of glycerin is raised at a specified rate, the sample softens and the sample or sphere touches the bottom plate of the ring base due to the weight of the sphere Temperature was defined as the softening point (JIS K 6863).

<Viscosity>
In a 500 mL capacity can, 300 g of hot melt adhesive in a state not containing air bubbles was put. After setting the temperature of the hot melt adhesive to 180 ° C., the rotor M4 was set in a B-type rotational viscometer (RB80L type viscometer), and the hot melt adhesive was immersed to the rotor mark. And the value when rotating for 30 seconds at 12 rpm was defined as the viscosity (JIS K 6862).

<Examples 1 to 8 (Sample Preparation 1)>
500 g of the hot melt adhesives of Production Examples 1 to 8 were placed in a melting tank of a foaming hot melt coating apparatus (CF-03 manufactured by Suntool Co.) and heated to 180 ° C. The hose and nozzle were set at 180 ° C. The foaming ratio was 2.5, and about 0.4 g of adhesive was applied to a mount with a width of about 5 mm and a length of about 10 cm. The conversion coating amount was 4 g / m.
Separately, prepare an oval cylindrical plastic bottle (total mass 140 g) containing 120 mL of sunscreen gel as an article, wrap the article with a perforated heat shrinkable film, and then apply hot air with a dryer, A packaged article (an article packaged with a heat-shrinkable film) was obtained by shrinking a heat-shrinkable film.
A foamed hot melt adhesive layer was formed on the mount, and the heat-shrinkable film of the packaged article and the mount were bonded together after an open time of 8 seconds to obtain the samples of Examples 1 to 8 (packaging with mount).
<Comparative Examples 1 to 8 (Sample Preparation 1)>
Samples of Comparative Examples 1 to 8 (with mount) except that the hot melt adhesives of Production Examples 1 to 8 were not foamed (for convenience, also referred to as “foaming ratio 1”). Package).

A thermal damage test and an adhesion test were performed on heat-shrinked films (hereinafter, also referred to as “shrink films”) of the samples prepared using the hot melt adhesives of Production Examples 1 to 8. Further, in order to evaluate the adhesive strength depending on the presence or absence of foaming of the hot melt adhesive, the adhesive strength in the same volume was determined for each of the foamed and unfoamed samples of the hot melt adhesives of Production Examples 1 to 8. The evaluation results are shown in Table 2.

<Thermal damage test for shrink film>
The shrink film of the sample (packaging with mount) obtained in Sample Preparation 1 is peeled off from the perforation to remove the plastic bottle as the article, and the foamed hot melt adhesive layer (Example) and the unfoamed hot melt adhesive The state of heat shrinkage of the shrink film (heat-shrinked film) in contact with the layer (comparative example) was confirmed, and thermal damage to the shrink film was evaluated according to the following criteria.
○: Wrinkles and shrinkage were not observed in the shrink film.
X: Wrinkles and shrinkage were observed in the shrink film.

<Adhesion test>
The adhesive state of the adhesive layer in each of the examples and comparative examples obtained in Sample Preparation 1 was evaluated visually according to the following criteria.
A: The shrink film and the mount are bonded, and the followability to the curved surface is excellent.
○: The shrink film and the mount are bonded.
X: There is an adhesion failure portion in the adhesion between the shrink film and the mount.

<Adhesive strength at the same volume>
A 6 mL hot melt adhesive (foaming hot melt adhesive with an expansion ratio of 2.5, hot foam adhesive without foaming (foaming ratio of 1)) was applied to the backing paper in a bead shape having a width of about 10 mm and a thickness of about 5 mm. Then, a sample was prepared by laminating a film capable of heat shrinking after an open time of 10 seconds. After the hot melt adhesive has cooled sufficiently, the temperature is adjusted for 10 minutes in a constant temperature room at 23 ° C., and then the film that can be thermally shrunk at a peeling angle of 180 ° and 300 mm / min in a 23 ° C. environment is peeled off. The adhesive force was measured. The obtained adhesive strength was evaluated according to the following criteria.
○: Peel strength is 20N or more.
X: Peel strength is less than 20N.

<Examples 9 to 14, Comparative Example 9 (Sample Preparation 2)>
Examples 9 to 14 and Comparative Example 9 were performed in the same manner as in Example 1 and Comparative Example 1 except that the hot melt adhesive of Production Example 4 shown in Table 1 was used and the expansion ratio was appropriately set to 1 to 10. A sample (packaging with mount) was obtained.

The sample produced using the obtained hot melt adhesive was subjected to a peeling test at 50 ° C., and an adhesive strength test at 23 ° C. and 0 ° C. The evaluation results are shown in Table 3.

<Peeling at 50 ° C>
The state of the sample when the sample obtained in Sample Preparation 2 was suspended in an oven controlled at 50 ° C. and stored for 72 hours was evaluated according to the following criteria.
○: There is no peeling of the packaged article, and there is no positional deviation of the attaching position.
(Triangle | delta): Although there is no peeling of a packaging article, the shift | offset | difference of less than 10 mm was seen in the sticking position.
X: The packaged article was peeled off and / or a deviation of 10 mm or more was observed at the attaching position.

<Adhesive strength at 23 ° C.>
The shrink film of the sample obtained in Sample Preparation 2 is peeled off from the perforation to remove the plastic bottle, and the temperature is controlled for 10 minutes in a thermostatic chamber at 23 ° C, and then peeled off at 300mm / min at a peeling angle of 180 ° in a 23 ° C environment. The adhesive strength was measured and the adhesive strength at 23 ° C. was evaluated according to the following criteria.
○: Peel strength is 10 N or more.
Δ: Peel strength is 5N or more and less than 10N.
X: Peel strength is less than 5N.

<Adhesive strength at 0 ° C>
The shrink film of the sample obtained in Sample Preparation 2 is peeled off from the perforation, the plastic bottle is removed, the temperature is adjusted for 10 minutes in an environment of 0 ° C, and then 300 mm / min at a peeling angle of 180 ° in an environment of 0 ° C. The adhesive strength when peeled off was measured and evaluated according to the following criteria.
○: Peel strength is 5N or more.
Δ: Peel strength is 1N or more and less than 5N.
X: Peel strength is less than 1N.

Examples 1 to 8 (see Table 2) using a foamed hot melt adhesive with a foaming ratio of 2.5 were compared with a non-foamed (foaming ratio: 1.0) hot melt adhesive of the same hot melt adhesive. It was found that superior adhesive strength was obtained as compared with Examples 1-8. In addition, it was found that the thermal damage to the shrink film was less when foamed than when not foamed.
Furthermore, from the results of Examples 9 to 14 in Table 3, it was found that better adhesive strength was obtained when the expansion ratio was 1.5 to 5. In Examples 9 to 14, after the packaging with the mount was manufactured and stored at 23 ° C. for 3 months, the foaming state of the foamed hot melt adhesive layer was confirmed. It was confirmed that it was included in the range of 1 to 10.

<Appendix>
The present specification also discloses the invention of the technical idea shown below, which is grasped from the above-described embodiment.
(Appendix 1)
Mount and
A heat-shrinkable film mount comprising: a heat-shrinkable film for packaging an article; and an adhesive layer that joins the heat-shrinkable film and the mount,
The adhesive layer is a foamed hot melt adhesive layer containing bubbles in a hot melt adhesive capable of reversibly repeating melting and solidification by heat, and is a film-backed mount with heat shrinkage.
(Appendix 2)
Mount and
An adhesive layer that joins a heat-shrinkable film, and a method for producing a heat-shrinkable film-mounted board comprising:
Preparing a hot melt adhesive capable of reversibly repeating melting and solidification by heat, and forming a foamed hot melt adhesive containing bubbles;
Forming an adhesive layer using the foamed hot melt adhesive on at least one of the mount and the heat-shrinkable film;
A method of manufacturing a mount with heat-shrinkable film, comprising a bonding step of bonding the mount and the heat-shrinkable film with the foamed hot melt adhesive layer interposed therebetween.

This application claims priority based on Japanese Patent Application No. 2013-9604 filed on January 22, 2013, the entire disclosure of which is incorporated herein.

The package with a mount of the present invention is suitable for shrink film packaging of various articles including cosmetics, medicines, foods, batteries, toys, clothing, stationery, miscellaneous goods, and the like.

DESCRIPTION OF SYMBOLS 1 Package with mount 2 Mount with film which can be heat-shrinkable 10 Film which can be heat-shrinked 11 Film 12 which has been heat-shrinked Mount 13 Adhesive layer 14 Hanging hole 15 Perforation 16 Opening opening 20 Article 21 Film packaging article

Claims (9)

1. Mount and
   Articles wrapped in heat-shrinkable film;
   A package with a mount comprising the heat-shrinkable film and an adhesive layer that joins the mount,
   The said adhesive bond layer is a packaging body with a mount which is a foaming hot-melt-adhesive adhesive layer which contains a bubble in the hot-melt-adhesive which can reversibly melt and solidify with heat.
2. The package with a mount according to claim 1, wherein the hot melt adhesive has a melt viscosity of 1,000 mPa · s or more and 50,000 mPa · s or less in a state where no bubbles are included.
3. The packaging body with a mount according to claim 1 or 2, wherein the foaming hot melt adhesive layer has an expansion ratio of 1.1 or more and 10 or less obtained from the formula (1).
   <Number _{1> V} 1 _/ V 2 ··· formula (1)
   In the formula, V ₁ is the volume of the foamed hot melt adhesive layer recovered from the package with mount, and V ₂ is obtained by heating and melting the foam hot melt adhesive layer recovered from the package with mount. The volume after defoaming.
4. The mount according to any one of claims 1 to 3, wherein a film wrapping article, which is the article wrapped with the heat-shrinkable film, is attached to the mount using the foamed hot melt adhesive layer. Package with attachment.
5. Mount and
   Articles wrapped in heat-shrinkable film;
   A method for producing a package with a mount comprising the heat-shrinkable film and a foamed hot melt adhesive layer for joining the mount,
   Coating the article with a heat-shrinkable film, and heat-shrinking the heat-shrinkable film;
   Preparing a hot melt adhesive capable of reversibly repeating melting and solidification by heat, and forming a foamed hot melt adhesive by including bubbles in the hot melt adhesive; and
   Forming a foamed hot melt adhesive layer using the foamed hot melt adhesive on at least one of the mount and the heat-shrinked film;
   The manufacturing method of the packaging body with a mount including the joining process which joins the said mount and the said heat-shrinked film through the said foaming hot-melt-adhesive agent layer.
6. Mount and
   Articles wrapped in heat-shrinkable film;
   A method for producing a package with a mount comprising the heat-shrinkable film and a foamed hot melt adhesive layer for joining the mount,
   Preparing a hot melt adhesive capable of reversibly repeating melting and solidification by heat, and forming a foamed hot melt adhesive by including bubbles in the hot melt adhesive; and
   Forming a foamed hot melt adhesive layer using the foamed hot melt adhesive on at least one of the mount and the heat shrinkable film before shrinking the thermally contracted film;
   Joining the mount and the heat-shrinkable film through the foamed hot-melt adhesive layer, and obtaining a film-attached mount that can be heat-shrinked;
   A method of manufacturing a package with a mount, comprising: covering the article with the heat-shrinkable film, and thermally shrinking the heat-shrinkable film.
7. The method for producing a package with a mount according to claim 5 or 6, wherein the hot melt adhesive has a melt viscosity of 1,000 mPa · s or more and 50,000 mPa · s or less in a state in which no bubbles are included.
8. The method for producing a package with a mount according to any one of claims 5 to 7, wherein an expansion ratio obtained from the formula (2) of the foamed hot melt adhesive is 1.1 or more and 10 or less.
   <Equation 2> V ₃ / V ₄ Formula (2)
   In the formula, V ₃ is a mass per 100 cc of the hot melt adhesive in a state in which no bubbles of the hot melt adhesive are included, and V ₄ is a mass per 100 cc of the foamed hot melt adhesive.
9. Forming the foamed hot melt adhesive layer;
   The method for manufacturing a package with a mount according to any one of claims 5 to 8, wherein the joining step is continuously performed while maintaining the molten state of the foamed hot melt adhesive.

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