JP2023022866A - Outer packaging bag laminate, outer packaging bag, and package - Google Patents

Abstract

To provide an outer packaging bag laminate for preventing a bag from being broken due to movement of a packaged article stored inside an outer packaging bag by improving a non-slip property of a surface itself, the surface of the outer packaging bag coming into contact with the packaged article according to the present invention; and to provide the outer packaging bag and a package thereof.SOLUTION: According to the present disclosure, there is provided an outer packaging bag laminate 10 for storing a plurality of packaged articles, the outer packaging bag laminate 10 comprising at least a paper base material layer 11 and a non-slip layer 12 from outside. The above-described problem is solved by the fact that a static friction coefficient defined in JIS P8147 (2010) between the packaged articles C each and the non-slip layer 12 is 0.40 or more and 0.80 or less.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present disclosure relates to an outer bag laminate, an outer bag, and a package.

Traditionally, multiple packaging bags individually wrapped with plastic film as a primary packaging material have been grouped together and stored in a larger pillow-shaped plastic outer bag from the viewpoint of quality maintenance and characteristics derived from food ingredients. many.

The above-mentioned pillow-type packaging bag is formed by heat-sealing both ends of a sheet of film and sticking them together to form a palm-joint portion to form a cylindrical shape, and then heat-welding the edges in a direction intersecting the palm-joint portion at regular intervals. It is a pillow-shaped packaging bag that is cut after forming a sealed portion.

Patent Literature 1 discloses a pillow-type packaging bag using a laminated film in which a sealant layer is laminated on one side of a stretched film.

By the way, although plastic packaging bags are superior in terms of film strength and the like, there is a tendency to avoid the use of plastic films due to the recent increase in environmental problems, and development of paper packaging bags is desired. .

Japanese Patent Application Laid-Open No. 2008-1372

However, paper packaging bags are weaker than plastic packaging bags. There was a risk of the bag breaking.

The present disclosure has been made in view of such problems. An object of the present invention is to provide an exterior bag laminate, an exterior bag, and a package that prevent

That is, a laminate for an exterior bag according to one embodiment is a laminate for an exterior bag for storing a plurality of items to be packaged, and the laminate for an exterior bag includes, from the outside, at least a paper base material and an anti-slip material. A static friction coefficient defined in JIS P8147 (2010) between the anti-slip layer and the outer layer of the package is 0.40 or more and 0.80 or less.

In addition, the exterior bag according to one embodiment is obtained by stacking the exterior bag laminate so that the anti-slip layer is on the inside, and making a bag.

A package according to one embodiment is formed by filling the package with the object to be packaged.

According to the present disclosure, by improving the anti-slip performance of the surface of the exterior bag in contact with the object to be packaged, an exterior bag laminate that prevents the bag from breaking due to the movement of the object to be packaged contained in the exterior bag, and the exterior Provide bags and packaging.

FIG. 1 is a cross-sectional view showing the layer structure of a laminate 10 for an outer bag according to this embodiment. FIG. 2 is a front view of the exterior bag 20 according to this embodiment. FIG. 3 is a front view of package 30 according to this embodiment. FIG. 4 is a cross-sectional view of package 30 taken along line II of FIG. FIG. 5 is an explanatory diagram of a developed view showing the exterior bag laminate 10 constituting the exterior bag 20 according to the present embodiment. FIG. 6 is an exploded view showing an exterior bag laminate 10 that constitutes an exterior bag according to Comparative Example 1. As shown in FIG.

An embodiment will be described below with reference to the drawings. 1 to 5 are diagrams showing one embodiment. Each figure shown below is shown typically. In addition, numerical values such as dimensions and material names of each member described in this specification are examples as an embodiment, and are not limited to these, and can be appropriately selected and used.

In addition, the shape and geometric conditions used in this specification, such as terms such as "parallel", "perpendicular", "same", length and angle values, etc., are not bound by a strict meaning. It is interpreted to include the extent to which similar functions can be expected.

First, the outer bag laminate 10 will be described.

The exterior bag laminate 10 with improved anti-slip properties of the present disclosure is made of paper for the purpose of suppressing unintentional movement of the packaged object C enclosed inside when the bag is made. is an exterior laminate.

The term “improving anti-slip properties” as used herein means improving the frictional force generated on the surface of the outer bag laminate 10 to make it less slippery. In the examples, the static friction coefficient was adopted as a measurement index as an objective evaluation of the anti-slip property improvement.

The outer bag laminate 10 has an outer surface 13 and an inner surface 14 as shown in FIG. The inner surface 14 is located on the side in contact with the item to be packaged C, and the outer surface 13 is the surface located on the opposite side of the inner surface 14 . The exterior bag laminate 10 includes a paper base layer 11 positioned on the outer surface 13 side and a non-slip layer 12 positioned on the inner surface 14 side. In the present application, regarding not only the surface of the outer bag laminate 10 but also the surfaces of each layer, the surface positioned on the storage part 23 side of the outer bag 20 is referred to as the inner surface, and the surface positioned on the opposite side of the inner surface is referred to as the outer surface. called.

In addition, the exterior bag laminate 10 is provided with a non-slip layer 12 on the inner surface 14 side that is in contact with the item C to be packaged, so that the exterior bag 20 can be easily removed during the process of filling the item C or joining the item C. Inadvertent movement of the object to be packaged C can be suppressed inside. Furthermore, it is possible to prevent damage to the object to be packaged C due to swinging of the object to be packaged C within the exterior bag 20 during transportation.

For this reason, in the non-slip layer 12 (inner surface 14) of the outer bag laminate 10, control of the non-slip when brought into close contact with the outer layer of the package C is an essential factor. In the measurement method according to the tilt method specified in JIS P8147 (2010), the static friction coefficient when the non-slip layer 12 of the outer bag laminate 10 and the outer layer of the object to be packaged C are in close contact with each other is 0.40 or more. It must be 0.80 or less, preferably in the range of 0.40 or more and 0.60 or less. By being included in the above range, it is possible to suppress inadvertent movement of the object to be packaged C in the exterior bag 20, and prevent the object to be packaged C from swinging within the exterior bag 20 during transportation. It is possible to prevent damage to the packaged item C caused by this. On the other hand, if the coefficient of static friction is less than 0.40, the object to be packaged C may easily move due to vibration or the like in the exterior bag 20, and the object to be packaged C may be damaged. On the other hand, when the coefficient of static friction exceeds 0.8, when a plurality of items to be packaged C are filled in the outer bag 20, the items to be packaged C are less likely to slip on the inner surface 14 of the outer bag 20, and the items to be packaged C charging efficiency may decrease.

In addition, in the measurement method according to the tilt method specified in JIS P8147 (2010) described later, the static friction coefficient when the non-slip layer 12 of the outer bag laminate 10 and the stainless steel plate with fine buffing finish are brought into close contact. is preferably 0.25 or more and 0.80 or less, more preferably 0.29 or more and 0.60 or less. By being included in the above range, the exterior bag laminate 10 is less likely to be misaligned in the process of filling the object to be packaged C and the process of joining the exterior bags. If the coefficient of static friction is less than 0.25, it is too slippery, and the object to be packaged C tends to shift. If the static friction coefficient of the outer bag laminate 10 exceeds 0.8, the slipperiness and releasability against the metal guide plate of the filling and packaging machine may decrease, and the rate of defects such as clogging may increase. .

Next, each layer constituting the outer bag laminate 10 will be described in order.

The non-slip layer 12, which comes into contact with the object to be packaged C, is formed on the inner surface 14 side of the paper base layer 11 in order to provide an appropriate frictional force on the surface when the outer bag laminate 10 is formed. . Furthermore, the non-slip layer 12 may have adhesiveness for the purpose of adhesiveness between the inner surfaces. Also, the anti-slip layer 12 may be a single layer or multiple layers.

The anti-slip layer 12 used in this embodiment is a layer having anti-slip properties. The anti-slip layer 12 may be a layer that further imparts adhesiveness. Specifically, ionomer resins, propylene-α olefin random copolymers, ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymers, ethylene-ethyl acrylate copolymers, ethylene-methacrylic acid copolymers, Polyolefin resins such as ethylene-α-olefin copolymer, ethylene-methyl methacrylate copolymer, ethylene-propylene copolymer, methylpentene polymer, polybutene polymer, polyethylene or polypropylene polymerized using a metallocene catalyst are acrylic Acid-modified polyolefin resin modified with unsaturated carboxylic acid such as acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, polyvinyl acetate resin, poly(meth)acrylic resin, polyvinyl chloride resin It is possible to use a coating film made of a resin such as Of these, ionomer resins have an increased number of polar groups present on the surface, so that anti-slip performance can be improved.

The coating amount of the anti-slip layer 12 is preferably 1.0 g/m ² or more and 5.0 g/m 2 or less, and 1.5 g/m ^{2 or} more per one side of the paper base layer 11 in terms of solid content. 0.5 g/m ² or less is more preferable. Within the above range, it is possible to improve anti-slip performance and ensure sufficient heat-sealing strength.

In the exterior bag 20 of the present embodiment, the non-slip layer 12 can be provided on the inner surface 14 side of the paper base layer 11 in, for example, a solid pattern, a line pattern, a dot pattern, or the like. Above all, when it is sticky, the adhesiveness of the surface of the inner surface 14 is high, so that the anti-slip performance can be improved.

A non-slip varnish layer can be formed on the anti-slip layer 12 for the purpose of improving anti-slip properties. As a result, when the inner surface 14 of the outer bag laminate 10 and the object to be packaged C are brought into close contact with each other, the value of the static friction coefficient can be expressed at 20° C. or higher and 60° C. or lower. As the non-slip varnish layer, for example, acrylic resin, urethane resin, or the like can be used, and fine particles may be added.

Examples of the fine particles include silica, aluminum hydroxide, talc, calcined clay, calcium carbonate, activated alumina, and apatite. Also, one or more of these may be added in an amount of 1% by mass or more.

In the above, general additives include, for example, cross-linking agents, antioxidants, ultraviolet absorbers, light stabilizers, fillers, antistatic agents, lubricants, anti-blocking agents, coloring agents such as dyes and pigments. , etc. can be used arbitrarily, and furthermore, a modifying resin or the like can also be used.

The non-slip layer 12 does not need to be provided on the entire surface of the paper base layer 11, and may be provided only on the portion to be provided with non-slip properties.

By subjecting the non-slip layer 12 of the outer bag laminate 10 to corona treatment, a laminate with improved anti-slip properties is obtained. The corona treatment roughens the surface of the anti-slip layer 12 and increases the number of polar groups present on the surface. Therefore, it is considered that the frictional force increases as the surface of the laminate is modified.

The method of coating the non-slip layer 12 is not particularly limited, and commonly used coating equipment can be used. For example, air knife coater, blade coater, gravure coater, rod blade coater, roll coater, reverse roll coater, bar coater, curtain coater, die slot coater, Champlex coater, metering blade type size press coater, short dwell coater, Various coating devices such as a spray coater, a gate roll coater and a lip coater can be used. Among them, a gravure coater is preferable.

The adhesive layer 21 is a layer for imparting adhesiveness to the inner surface 14 side of the paper base material layer 11 at the palm-joint portions 24 (24A, 24B), as shown in FIG. In other words, the adhesive layer 21 is a layer to be used for the sealing portion 22 of the outer bag laminate 10 when a non-adhesive material is used for the non-slip layer 12 . Specifically, low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear (linear) low-density polyethylene, polypropylene, unstretched polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer Polymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-α olefin copolymer polymerized using a metallocene catalyst, polypropylene, ethylene-methyl methacrylate copolymer, ethylene- Acid-modified polyolefin resin such as propylene copolymer, methylpentene polymer, polybutene polymer, polyethylene or polypropylene with unsaturated carboxylic acid such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid and itaconic acid. Coating films made of resins such as polyolefin resins, polyvinyl acetate resins, poly(meth)acrylic resins, and polyvinyl chloride resins can be used.

In the edge seal portion 25 (26), the coating amount of the adhesive layer 21 is preferably 1 g/m ² or more and 5 g/m ² or less, and 1.5 g/m ² per side of the paper base layer 11 in terms of solid content. 4.5 g/m ² or more is more preferable. Within the above range, sufficient heat seal strength can be ensured.

In the exterior bag 20 of the present embodiment, the adhesive layer 21 is provided on the inner surface of the paper base layer 11 in a pattern such as a solid pattern, a line pattern, or a dot pattern.

For the paper base layer 11, for example, various types of paper such as one-sided glossy paper, strong sizing bleached paper, strong sizing unbleached paper, pure white roll paper, kraft paper, cardboard, and processed paper can be used. One side of the single glossy paper is a highly glossy glossy surface, and the surface opposite to the glossy surface (clean surface) has a lower density than the glossy surface.

The basis weight of the paper base material layer 11 used in this embodiment is not limited, but the basis weight is preferably in the range of 30 g/m ² or more and 100 g/m ^{2 or} less. When it is within the above range, it is excellent in moderate strength and workability, and it is easy to store the object to be packaged C after bag making.

The printed layer 18 is formed on a part or the entire surface of the paper base material layer 11 on the outer surface 13 side, if necessary, for the purpose of enhancing the design of the outer bag laminate 10 .
The print layer 18 may be a single layer, or may be formed from two or more layers.

The printed layer 18 is preferably formed on substantially the entire surface of the paper base layer 11 . By forming the printed layer 18 over substantially the entire surface of the paper base material layer 11, it is possible to easily homogenize the appearance (feel) of the laminate for exterior bag 10 from the outer layer side. “Substantially the entire surface” means 80% or more of the area of the paper base layer 11, preferably 90% or more, and more preferably 99% or more.

The printing layer 18 can be formed by multi-color printing in which process colors of cyan, magenta, yellow, and black and white are added, or by special-color multi-color printing performed by preparing plates of individual colors that make up the picture. can also be formed.

A method for printing the print layer 18 is not particularly limited. For example, the print layer 18 can be formed by gravure printing. Here, gravure printing is a type of printing method in which the portion of the original plate to which ink is to be applied is engraved in a concave shape. Color density can be adjusted by pressure or the like. A gravure printing machine has one printing unit for each color, and is excellent in reproducibility of images with gradation such as photographs.

As the printing layer 18, one or more of ordinary ink vehicles are prepared from a resin and a solvent, and if necessary, plasticizers, stabilizers, antioxidants, light stabilizers, ultraviolet absorbers, Curing agents, cross-linking agents, lubricants, antistatic agents, fillers, and other auxiliaries are optionally added, and colorants such as dyes and pigments are added, and solvents and diluents are added. The ink composition obtained by sufficiently kneading the ingredients in the above method can be used.

Examples of such ink vehicles include known ones such as linseed oil, tung oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin-modified resin, shellac, alkyd resin, phenolic resin, maleic acid resin, Natural resin, hydrocarbon resin, polyvinyl chloride resin, polyacetic acid resin, polystyrene resin, polyvinyl butyral resin, acrylic resin, methacrylic resin, polyamide resin, polyester resin, polyurethane resin, epoxy resin, Urea resins, melamine resins, amino alkyd resins, nitrocellulose, ethyl cellulose, chlorinated rubbers, cyclized rubbers, and others can be used singly or in combination of two or more. The ink vehicle serves to carry the colorant from the plate to the substrate and fix it as a coating.

Moreover, the drying property of the ink differs depending on the solvent. The main solvents used in printing inks are toluene, MEK, ethyl acetate, and IPA, and solvents with low boiling points are used for fast drying. If the ink dries too quickly and the printed material is scratched or if printing is not possible, a solvent with a high boiling point can be mixed as appropriate. This makes it possible to print fine characters clearly. Colorants include dyes that dissolve in solvents and pigments that do not dissolve in solvents. , gravure inks use pigments. Pigments include inorganic pigments and organic pigments. Inorganic pigments include titanium oxide (white), carbon black (black), aluminum powder (gold and silver) and the like, and organic pigments are preferably azo pigments.

Although gravure printing has been described above, printing methods such as offset printing, inkjet printing, letterpress printing, screen printing, transfer printing, flexographic printing, and others may also be used.

Next, the exterior bag 20 according to this embodiment will be described with reference to FIG.

The exterior bag 20 according to the present embodiment is a packaging bag formed by bagging the exterior bag laminate 10 by heat sealing or the like. The packaging form is not limited to the pillow seal type shown in FIG. and superimposed, and the peripheral edges thereof are, for example, standing pouch type, side seal type, two side seal type, three side seal type, four side seal type, envelope pasted seal type, pleated seal type, flat bottom seal type, square bottom Various forms of packaging bags can be obtained by bonding in a form such as a seal type or a gusset type.

As shown in FIG. 2, the pillow-type exterior bag 20 includes an edge sealing portion 26 of the lower portion 16, a seal-to-be-sealed portion 22 serving as an edge sealing portion of the upper portion 15 facing in the first direction D1, and a lower portion 16. A palm-to-palm portion 24 extends from the edge seal portion 26 to the opening of the upper portion 15 along the first direction D1 and joins the inner surfaces of the outer bag laminate 10 to each other. The first direction D1 is the direction in which the outer bag laminate 10 is conveyed when the outer bag 20 is produced from the outer bag laminate 10, and is a so-called MD (Machine Direction). A second direction D2 orthogonal to the first direction D1 is a so-called TD (Transverse Direction). These sealing portions are configured to form a storage portion 23 in which the object to be packaged C is stored inside the exterior bag 20 and to seal the portion 22 of the exterior bag 20 to be sealed.
Although not shown, the outer bag 20 may have an unsealing start portion such as a notch in the palm-to-palm portion 24 and the edge seal portion 26 . The notch is a notch such as a V-shape, a notch, or the like.

Furthermore, the exterior bag 20 is provided with a palm-to-palm portion 24 formed by overlapping the inner surfaces (surfaces on the side of the object to be packaged C) of one sheet of the exterior bag laminate 10 on the back portion 32 . This palm-to-palm portion 24 is joined by the adhesive layer 21 .
The palm-to-palm portion 24 is formed so as to protrude from the back surface portion 32 . In the present embodiment, as shown in FIG. 2 , the palm-joint portion 24 is laid down to the right (second direction D2) and overlapped on the second back surface portion 32B located on the right side of the palm-joint portion 24 . Alternatively, the palm-joining portion 24 may be laid down to the left (second direction D2) and overlapped with the first rear surface portion 32A located on the left side of the palm-joining portion 24 (not shown).
In the present embodiment, in order to facilitate understanding, the left side (second direction D2) of the palm-joint portion 24 of the back portion 32 is the first back portion 32A, and the right side is the second back portion 32A, if necessary. 32B.

The palm-to-palm portion 24 is formed on the back surface portion 32 of the exterior bag 20, and joins the edges of the exterior bag laminate 10 in the longitudinal direction (first direction D1) such that the inner surfaces of the exterior bag 20 overlap each other. (paste your hands together).

The palm-to-palm portion 24 is provided from the upper portion 15 to the lower portion 16 along the longitudinal direction (first direction D1) of the exterior bag 20, as shown in FIG.

As shown in FIG. 2, the upper portion 15 is provided with an upper portion to be sealed 22 extending along it, and the lower portion 16 is provided with a lower edge sealing portion 26 extending along it. . The lower edge seal portion 26 joins the inner surfaces of the outer bag laminate 10 to form a surface portion 31 and a back portion 32 . In this embodiment, the non-slip layer 12 is provided on one side of the paper base material layer 11 to be described later in the surface portion 31 and the back portion 32 .

Here, before the object to be packaged C is accommodated in the storage portion 23 , the opening portion of the upper portion 15 of the outer bag 20 becomes the seal-scheduled portion 22 in an unsealed state. In this embodiment, for example, the upper portion 15 of the exterior bag 20 serves as the portion to be sealed 22 before the object to be packaged C is accommodated. After the object to be packaged C is accommodated in the storage portion 23 , the portion to be sealed 22 is joined to form the edge seal portion 25 of the upper portion 15 , and the object to be packaged C is hermetically sealed in the exterior bag 20 .

As shown in FIG. 4 , when viewed from the bottom (lower portion 16 side), the palm-joint portion 24 of the exterior bag 20 located on the back surface portion 32 of the exterior bag 20 has a first palm-joint portion 24A and a second palm-joint portion 24B. The inner surfaces of the members 20 are joined to each other through an adhesive layer 21 so as to overlap each other.
Note that the palm-to-palm portion 24 does not need to form the adhesive layer 21 up to the distal end portion 27 in the lateral direction (second direction D2).

That is, in the present embodiment, as shown in FIG. 4, in the lateral direction (second direction D2), the folded portion (base portion) 28 side of the palm-joining portion 24 (first palm-joining portion 24A, second palm-joining portion 24B) is an adhesive layer. Although it is necessary to be joined at 21, it is not necessary to join up to the tip portion 27 side.
In the present application, the region located closer to the distal end portion 27 than the central portion 29 of the joint portion 24 is referred to as the "tip side", and the region located closer to the folded portion 28 than the central portion 29 is referred to as the "folded portion side".

FIG. 5 is an exploded view showing the exterior bag laminate 10 that constitutes the exterior bag 20 of FIG.
As shown in FIG. 5, if the adhesive layer 21 of the palm-to-palm portion 24 is provided on the first folded portion 28A side and the second folded portion 28B side, the adhesive layer 21 is provided to the first tip portion 27A and the second tip portion 27B. It doesn't have to be.

As shown in FIGS. 3 and 4, this exterior bag laminate 10 is processed into a package 30, which is an exterior bag 20 for an object C to be packaged. The package 30 is provided with edge seal portions 25 and 26 and a back seal portion 21, and is formed into a bag shape by joining them. Therefore, a plurality of objects C to be stored are enclosed and packaged inside the exterior bag 20 .

The object to be packaged C is a so-called small bag product in which an inner bag using a laminated film for an inner bag is filled with appropriate contents and sealed.
The laminate film for inner bag has at least a base film layer and a heat seal layer from the outside. In addition, an intermediate layer may be provided between the base film layer and the heat seal layer in the laminated film for inner bag. Moreover, you may laminate|stack via an adhesive layer between each layer.

The base film layer is an outer layer of the inner bag laminate film, and is a layer on the side of the outer bag laminate 10 in contact with the non-slip layer 12 .
Plastic films such as polypropylene, polyethylene, polyester, and polyamide can be used as the constituent material of the base film layer. The plastic film may be uniaxially stretched or biaxially stretched.

Further, the constituent material of the heat seal layer is, for example, low density PE (LDPE), linear low density PE (LLDPE), medium density PE (MDPE), high density PE (HDPE), ethylene-vinyl acetate copolymer. Polyolefin resins such as coalescence, propylene homopolymers, ethylene-propylene block copolymers, ethylene-propylene random copolymers, etc. may be mentioned, and one or more of these resins may be used.

The intermediate layer may be provided with, for example, a barrier layer for suppressing permeation of oxygen gas and water vapor. Materials constituting the intermediate layer include, for example, vapor deposition films containing inorganic oxides, metal foils, and the like.

This content includes, for example, food. Examples of foods include oil-containing foods such as snacks and chocolates, and dried foods. However, the contents are not limited to sweets and the like, and include various articles such as electronic parts.

Next, an example of a method for manufacturing the outer bag laminate 10 will be described.

As shown in FIG. 1, first, the paper base layer 11 described above is prepared. Subsequently, after forming the print layer 18 on the outer surface 13 side of the paper base material layer 11 as necessary, the non-slip layer 12 is formed on the inner surface of the paper base material layer 11 . As shown in FIG. 5, for example, the first tip portion 27A of the first palm-joint portion 24A of the palm-joint portion 24 (or the second tip portion 27B of the second palm-joint portion 24B) side of the paper base layer 11 is The first folded portion 28A side (or the second folded portion 28B) may be coated except for this. The flow direction of the paper base material layer 11 corresponds to the first direction D1 shown in FIG. In this way, the outer bag laminate 10 having at least the printed layer 18, the paper base layer 11, and the non-slip layer 12 in order from the outer surface 13 side to the inner surface 14 side can be obtained.

As shown in FIG. 2, the exterior bag 20 is formed by bagging the exterior bag laminate 10 by heat sealing or the like. The seal portion includes a palm-to-palm portion 24 and an edge seal portion 26 . The exterior bag 20 forms a housing portion 23 surrounded by a palm-to-palm portion 24 and an edge seal portion 26, and is configured to seal the exterior bag 20. As shown in FIG.

According to the present embodiment, the exterior bag laminate 10 forms the non-slip layer 12 on the inner surface 14 side located in contact with the item to be packaged C, and the surface of the exterior bag 20 in contact with the item to be packaged C is formed. Improves its anti-slip performance. Therefore, it is possible to prevent the bag from being broken due to movement of the object to be packaged C housed in the exterior bag 20 . In addition, it is possible to prevent damage to the object to be packaged C due to swinging of the object to be packaged C within the exterior bag 20 during transportation.

Next, specific examples in the above embodiment will be described, but the present disclosure is not limited to the description of the following examples as long as the gist thereof is not exceeded.

(Example 1)
As the paper base layer 11, ^cyan , magenta, The printing layer 18 was formed by multi-color gravure printing, such as adding yellow and black process colors and white.
Next, a water-based ionomer emulsion (trade name: Chemipearl S-500, Mitsui Chemicals, Inc., composition: metal salt of ethylene/methacrylic acid copolymer, self-emulsifying emulsion) was applied by gravure coating. The dry coating amount of the non-slip layer 12 was 3.5 g/m ² .
That is, as shown in FIG. 5, while conveying the paper base layer 11 in the machine direction, the first palm-to-palm portion It was applied to the entire surface of the first tip portion 27A of 24A and the second tip portion 27B of the second palm-joint portion 24B except for a width of 3 mm. After that, it was dried to produce the outer bag laminate 10 shown in FIG.
The outer bag laminate 10 of Example 1 had the printed layer 18, the paper base layer 11, and the non-slip layer 12 in this order. The dry coating amount of the non-slip layer 12 was 3.5 g/m ² .

(Example 2)
The outer bag laminate 10 of Example ² shown in FIG. .

(Comparative example 1)
A laminate 10 for outer packaging bags of Comparative Example 1 shown in FIG. . As the adhesive layer 21, a water-based ionomer emulsion (trade name: Chemipearl S-500, manufactured by Mitsui Chemicals, composition: metal salt of ethylene/methacrylic acid copolymer, self-emulsifying emulsion) was applied by gravure coating. The dry coating amount of the adhesive layer 21 was 3.5 g/m ² .

[Measurement of static friction coefficient]
In order to evaluate slipperiness, measurement was performed according to the slope method described in JISP8147 (2010). A static friction coefficient measuring device was used as a device.
The outer bag laminate 10 described in Examples 1 and 2 and Comparative Example 1 was cut into pieces of 100 mm in the MD direction and 240 mm in the TD direction. The inner surface 14 side (X) of the outer bag laminate 10 was measured by a static friction coefficient measuring device that satisfies the inclination method of JISP8147 (2010) so that the outer bag laminate 10 was not bent. It was fixed so that it would be a plane.
Next, as the laminated film for the inner bag used for the object to be stored C, the layer structure is a biaxially stretched polypropylene film (manufactured by Mitsui Chemicals Tocello Co., Ltd., product name U-1, thickness 20 μm) and an unstretched polypropylene film (Toyobo Co., Ltd. A laminate film was prepared by laminating P1128 (manufactured by the company, product name, thickness 20 μm) with a two-liquid curing adhesive. Next, the inner bag laminated film was cut into a width of 30 mm in the MD direction and a length of 80 mm in the TD direction. Then, with the biaxially stretched polypropylene film side (Y) as the measurement surface, it was fixed to a weight of 30 mm width×40 mm length×30 mm height and weighing 200 g so as to cover the entire measurement surface. Then, after the non-slip layer 12 of the outer bag laminate 10 and the inner bag laminated film piece are brought into close contact with each other, they are tilted on the inclined surface of the friction measuring machine, and the static friction coefficient is calculated from the angle of the inclined surface when the weight starts to move. Calculated.
In addition, it measured 3 times and compared the numerical value which calculated the average value to 2 decimal places. As the evaluation of slipperiness, a static friction coefficient of 0.40 or more and 0.80 or less was evaluated as ◯, and others were evaluated as x.

Next, the inner surface 14 side (X) of the exterior bag laminate 10 described in Examples 1 and 2 and Comparative Example 1, which is a sample, is placed on a moving block that has a width of 60 mm, a length of 100 mm, and a weight of 1000 g. I glued them together like this. Then, the static friction coefficient measuring machine is mounted so that the fine buff-finished stainless steel plate (SUS304 plate) side (Z) becomes the measurement surface, and the moving block with the outer bag laminate 10 of the sample is placed on the steel plate. bottom.

In the static friction coefficient measuring machine, the inclination speed of the steel plate was set to 2.0°/sec while the sliding inclination was changed, and the angle θ at which the moving block started to slide was read. The value of tan θ (that is, coefficient of static friction) was obtained from this angle θ. In addition, the static friction coefficient measurement method by the said inclination method was measured according to the inclination method of JISP8147 (2010).
In addition, it measured 3 times and compared the numerical value which calculated the average value to 2 decimal places. As the evaluation of slipperiness, a static friction coefficient of 0.25 or more and 0.80 or less was evaluated as ◯, and others were evaluated as x.

[Packaging suitability test]
Both ends of the outer bag laminate 10 described in Examples 1 and 2 and Comparative Example 1 are heat-sealed and pasted together to form a palm-to-palm portion 24 and formed into a cylindrical shape, and then in a direction intersecting the back seal portion 21 at regular intervals. 250 mm long (first direction D1) and 350 mm wide (surface portion 31 width 160 mm, first back portion 32A width 80 mm, first The exterior bag 20 was manufactured so that the width of the rear portion 32B was 80 mm, the width of the first palm-joint portion was 15 mm, and the width of the second palm-joint portion was 15 mm.

Subsequently, the object to be packaged C to be filled in the exterior bag 20 of Examples 1 and 2 and Comparative Example 1 was 8.0 cm in the longitudinal direction and 4.0 cm in the width direction when unfilled. An individually packaged product was used in which chocolate confectionery (one piece, about 10 g per piece) was enclosed in a small bag made of unstretched polypropylene film. A total of 10 pieces of this to-be-packaged article were each filled in the exterior bag 20 described in Examples 1 and 2 and Comparative Example 1, and the opening of the package was sealed with a heat sealing machine to produce a package 30.

The package 30 was held by hand and shaken in the vertical direction with a swing width of 20 cm, twice per second, for a total of 30 times, and the number of broken exterior bags 20 was counted. The evaluation was carried out on 10 packages 30, and the evaluation was based on the criteria of ⊚ when the number of broken bags was 0, ∘ when 1 bag was broken, and x when 2 or more bags were broken.

[Integration aptitude test]
In the automatic packaging process of an actual bag-making machine, when the items C to be packaged are moved or housed in the outer bag 20, the stacked items C are displaced, broken in the outer bag 20, or cannot be packed. The evaluation was made on the basis of x when there was no problem, and on the basis of o when there was no problem.

Next, Table 1 shows the measurement results (average values) of the static friction force and the results of the packaging suitability test for Examples 1 and 2 of the present embodiment and Comparative Example 1. Incidentally, in Table 1, XY and ZX indicate combinations of surfaces brought into close contact with each other.

From Table 1, while Examples 1 and 2 of the present embodiment were evaluated as ◯ or better for all items, Comparative Example 1 was evaluated as x for one of the items.
Therefore, in the outer bag laminate 10 according to Examples 1 and 2 in Table 1, the coefficient of static friction between the non-slip layer 12 and the object to be packaged C is in the range of 0.40 or more and 0.80 or less. By suppressing the movement of the object to be packaged C accommodated in the exterior bag 20, the bag breakage could be prevented. In addition, in the outer bag laminate 10 according to Examples 1 and 2, the coefficient of static friction between the non-slip layer 12 and the fine buffed stainless steel plate is in the range of 0.25 or more and 0.80 or less. It was excellent in the stackability of the object to be packaged C in the packaging machine.

10 Outer Bag Laminate 11 Paper Base Layer 12 Non-slip Layer 13 Outer Surface 14 Inner Surface 15 Upper Part 16 Lower Part 18 Printed Layer 20 Outer Bag 21 Adhesive Layer 22 Portion to be Sealed 23 Storage Portion 24 Joining Palm Portion 24A First Joining Portion 24B Second Palm-to-palm portions 25, 26 Edge seal portion 27 Tip portion 27A First tip portion 27B Second tip portion 28 Folded portion 28A First folded portion 28B Second folded portion 29 Central portion 29A First central portion 29B Second central portion 30 Packaging Body 31 Surface part 32 Back part 32A First back part 32B Second back part C Object to be packaged D1 First direction (longitudinal direction)
D2 Second direction (horizontal direction)

Claims (4)

An exterior bag laminate for storing a plurality of items to be packaged,
The exterior bag laminate comprises at least a paper base material and an anti-slip layer from the outside,
A laminate for an exterior bag, wherein the coefficient of static friction defined in JIS P8147 (2010) between the non-slip layer and the outer layer of the package is 0.40 or more and 0.80 or less. 2. The outer bag laminate according to claim 1, wherein the non-slip layer and the fine buffed stainless steel plate have a static friction coefficient of 0.25 or more and 0.80 or less as defined in JIS P8147 (2010). An outer bag comprising the outer bag laminate according to claim 1 or claim 2,
An outer bag obtained by stacking the outer bag laminate so that the non-slip layer is on the inner side and making a bag. A package obtained by filling the outer bag according to claim 3 with the object to be packaged.

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