JPH10156997A - Packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent adsorption or leakage of perfume of content or drug action component or transfer of off-taste or off-odor to the content by providing a thermal adhesive resin layer on a thermal adhesive part forming area of a vapor deposited layer surface of a plastic film, and thermally adhering with the resin layer. SOLUTION: A thermal adhesive resin layer 5 is formed directly on a thermal adhesive part forming area on a surface of a vapor deposited layer 4 of a vapor deposited plastic film 2 of an inorganic material made of a plastic film 3 having the layer 4 of inorganic material, and thermally adhered by the layer 5. The surface in contact with a content 9 is only a surface of the layer 4 of the inorganic material. And, a print layer 8 is provided on a surface of the film 3 of the inorganic material. The layer 4 uses aluminum, silicon oxide, or aluminum oxide. Its thickness is preferably, for example, 200 to 800Å from the relationship between a cost and an effect. The resin suitably uses urethane resin, vinyl chloride vinyl acetate copolymer resin, acrylic resin, polyester resin, or the other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag for containing contents such as foods, medicines, cosmetics, and the like. For packaging bags that do not occur.

[0002]

2. Description of the Related Art Conventionally, foods containing aroma and medicinal ingredients,
The contents of pharmaceuticals, cosmetics, etc., or the contents of foods, pharmaceuticals, cosmetics, etc., which easily absorb off-flavors or odors, are laminated bodies of various plastic films, or laminated bodies using paper or aluminum foil as appropriate. And is protected by being packaged in a packaging bag or the like in which a necessary peripheral portion is thermally bonded.

[0003] Further, in these commonly used packaging bags, the layer in contact with the contents is usually a polyolefin resin such as polyethylene or polypropylene, an ionomer, an ethylene-methyl acrylate copolymer, or an ethylene-acrylic acid copolymer. It is formed of a united resin, a copolymer resin such as an ethylene-methacrylic acid copolymer, or a sheet obtained by forming these into a film by a known technique.

However, when the layer in contact with the contents is formed of the above-described resin or a sheet of the resin, the scent or medicinal component contained in the contents is not applied to the resin or the sheet of the resin. It is adsorbed over time, and the fragrance and medicinal components are reduced and the efficacy is reduced. Conversely, the resin, or the sheet of the resin, has a different content from the resin or the sheet of the resin to the contents. There is a problem that the odor or the odor is transferred and the scent or taste of the contents is altered.

[0005] For this reason, in accordance with the effective use period of the contents, the amount of scents and medicinal ingredients which are adsorbed and reduced during the effective use period are preliminarily included, thereby increasing costs. The problem of the factor and the temporal adsorption of the fragrance and the amount of the medicinal ingredient or the temporal deterioration due to the transfer of the off-flavor or the off-flavor lead to the problem that the quality of the contents is unstable. As another problem, from the viewpoint of protecting the contents up to the point of use, a packaging bag for packaging this kind of contents is generally costly in proportion to the contents. It is.

[0006]

Therefore, the present invention does not adsorb the scent or medicinal component contained in the contents, does not leak it to the outside, and has a problem of giving off unpleasant odor or smell to the contents. The goal is to provide a packaging bag that does not require migration and at a low cost.

[0007]

The inventors of the present invention have conducted various studies to solve the above-mentioned problems, and as a result, have found that foodstuffs such as chocolate confectionery and oil confectionery which can easily adsorb off-flavors and off-flavors. Or, in medicines and cosmetics and the like in which fragrances and medicinal ingredients such as menthol, limonene, methyl salicylate and the like are easily absorbed by percutaneous absorbents and facial cleansing powders containing medicinal ingredients, the foods, pharmaceuticals and cosmetics In the case of a packaging bag in which the layer in contact with the contents such as aluminum, silicon oxide, or a vapor-deposited layer of an inorganic substance such as aluminum oxide, the scent or medicinal component is not adsorbed, and the packaging bag is The present invention has been completed by finding out that no leakage to the outside occurs, and that no off-taste or unpleasant odor is transferred to the contents from the inorganic vapor deposition layer or the outside.

That is, the layer in contact with the contents is composed of a single plastic film having an inorganic vapor-deposited layer formed thereon, and a heat-adhesive resin layer is provided in a heat-adhesive portion forming region on the surface of the vapor-deposited layer. In a heat-bonded packaging bag, the plastic film is biaxially oriented polypropylene, biaxially oriented polyethylene terephthalate,
It is composed of a biaxially stretched plastic film such as biaxially stretched polyamide or a uniaxially stretched plastic film such as uniaxially stretched polypropylene or uniaxially stretched polyethylene, and the vapor deposition layer of the inorganic material is vapor deposition of an inorganic material such as aluminum, silicon oxide, or aluminum oxide. And the heat-adhesive resin layer is composed of a plurality of layers of different resins,
Further, so that the heat bonding resin layer is provided in the heat bonding portion forming region to be surely aligned and heat bonded,
The present invention relates to a packaging bag in which a mark for positioning is formed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described. First, paper or various plastic films can be used as a base material on which an inorganic material such as aluminum, silicon oxide or aluminum oxide is formed. In view of the fact that the packaging bag of the present invention is composed of a single plastic film on which the above-mentioned inorganic vapor-deposited layer is formed, for example, biaxially oriented plastic such as biaxially oriented polyethylene terephthalate film, biaxially oriented polyamide film, biaxially oriented polypropylene film, etc. A film or a uniaxially stretched plastic film such as a uniaxially stretched polypropylene or a uniaxially stretched polyethylene is suitable from the viewpoint of suitability for packaging and processing, and in consideration of cost, for example, a biaxially stretched polyethylene terephthalate film and a biaxially stretched polyamide film are 12-25 μm Those of Mino range are suitable,
A biaxially stretched polypropylene film having a thickness in the range of 20 to 50 μm is appropriate, and a uniaxially stretched polypropylene film and a uniaxially stretched polyethylene film are preferably 20 to 30 μm.
μm is appropriate. If a uniaxially stretched plastic film is used, it can be provided with an easy tearing property, so that a packaging bag having an easy opening function can be obtained. In addition, the thickness of the vapor-deposited layer is 200 to 200 from the relationship between cost and the effect of the present invention.
It is preferable that the angle is 800 °, particularly 400 to 600 °.

[0010] Further, it can be used for foods such as chocolate confectionery and oil confectionery which tend to adsorb off-flavors and off-flavors, or for percutaneous absorbents and face-washing powders containing aroma and medicinal ingredients such as menthol, limonene and methyl salicylate. The layer in contact with the contents such as medicines and cosmetics to which typical fragrances and medicinal components are easily adsorbed is formed by a vapor-deposited layer of an inorganic substance such as aluminum, silicon oxide, and aluminum oxide, and this configuration does not have a sealing function. Therefore, from the necessity of the sealing function utilizing the present invention, aluminum of the layer in contact with the contents,
Providing a heat-adhesive resin layer directly on the heat-adhesive portion forming area on the surface of a vapor-deposited layer of an inorganic substance such as silicon oxide or aluminum oxide, and obtaining a sealed good packaging bag by heat-adhering the heat-adhesive resin layer. it can.

Examples of the heat-adhesive resin used in the heat-adhesive resin layer described in the preceding paragraph include urethane resins, vinyl chloride-vinyl acetate copolymer resins, acrylic resins, polyester resins, chlorinated polypropylene resins, and chlorinated polypropylene resins. Polyethylene-based resin, or other modified polyolefin-based resin is suitable, using a resin composition obtained by arbitrarily adding one or more of these vehicles and optionally adding a desired additive thereto and kneading them. The thermal adhesive resin layer can be formed by printing by a gravure printing method. As a printing pattern of the heat-adhesive resin layer, for example, a lattice pattern is used, and since the heat-adhesive resin layer is formed on a lattice portion, a necessary rectangular heat A large number of bonded portion forming regions are arranged vertically and horizontally. The thickness of the heat-adhesive resin layer is 2 when dry.
The range is preferably from 10 to 10 g / m ² . The resin composition may be colored by adding a desired pigment as needed.

The thermoadhesive resin layer formed using the above resin composition may be a single layer or a plurality of layers of different resins. That is, it is only necessary to obtain a sealed good packaging bag by heat-bonding the heat-adhesive resin layer, and if necessary, a layer having an adhesive function to the surface of the vapor-deposited layer of the inorganic substance and a layer formed by heat bonding. The heat-adhesive resin layer may be formed by a plurality of layer configurations of different resins provided separately with a layer having a sealing function, and in this case, the total coating amount of the heat-adhesive resin layer Is preferably ² to 10 g / m ² when dry. Further, the above-mentioned different resins not only refer to resins having different resin types, but also refer to resins having different mixing ratios in the case of mixed resins.

Next, the packaging bag of the present invention is manufactured by using an automatic packaging machine or a bag making machine. At that time, the packaging bag is securely bonded by heat at the heat bonding portion forming area provided with the heat bonding resin layer. It is necessary to use a mark provided for alignment for this purpose on the packaging bag. This mark may be any as long as it can be detected by a photoelectric tube mark detection device or the like provided in the automatic packaging machine or the bag making machine, etc.
For example, it can be formed by printing a mark on the plastic film surface of the biaxially stretched plastic film on which the inorganic vapor-deposited layer is formed at the same time as printing a beautiful pattern, or by forming the heat-adhesive resin layer on the phototube mark. The mark can be replaced by coloring so that it can be detected by a detection device or the like, or can be replaced by forming a punch hole or the like in a packaging material before forming a packaging bag.

In short, the packaging bag of the present invention prints a beautiful pattern in register with the mark and provides a heat-adhesive resin layer directly on a heat-adhesive portion forming area on the surface of the inorganic vapor deposition layer. . As a matter of course, the mark may not be necessary when beautiful pattern printing is performed at a pitch.

On the other hand, as the form of the packaging bag of the present invention, a three-side seal type, a four-side seal type, a pillow type, a gusset type and the like can be arbitrarily selected, and it goes without saying that the present invention is not particularly limited. Further, as can be seen from the configuration, the packaging bag of the present invention is particularly suitable for individual packaging or lightweight packaging.

Next, a more detailed description will be given below with reference to the drawings. First, FIG. 1 is a schematic perspective view of one embodiment of a packaging bag of the present invention, FIG. 2 is a cross-sectional view taken along line XX of the first embodiment of the packaging bag of the present invention, and FIG. It is sectional drawing of the XX of 2nd Embodiment of a packaging bag. 1 in the figure is a packaging bag, 2
Is an inorganic vapor-deposited plastic film, 3 is a plastic film, 4 is an inorganic vapor-deposited layer, 5, 6, and 7 are thermo-adhesive resin layers, 8 is a printed layer, 9 is a content, 10 is a thermo-adhesive part, and 11 is a print. Marks respectively shown.

FIG. 1 is a schematic perspective view of one embodiment of a packaging bag according to the present invention, showing a state in which contents are stored in a four-side seal type packaging bag 1. FIG. 2 is a cross-sectional view taken along the line XX of the first embodiment of the packaging bag of the present invention. The inorganic bag is made of a plastic film 3 provided with an inorganic vapor deposition layer 4 such as aluminum, silicon oxide, and aluminum oxide. On the surface of the vapor-deposited plastic film 2 on the surface of the vapor-deposited layer 4 made of an inorganic substance such as aluminum, silicon oxide, or aluminum oxide, a heat-adhesive resin layer 5 is directly formed in a heat-adhesive portion forming region. The package is a heat-bonded packaging bag, and the surface in contact with the contents 10 is an inorganic vapor deposition layer 4.
Surface only. Thus, a printing layer 8 is provided on the surface of the plastic film 3 of the inorganic vapor-deposited plastic film 2.

FIG. 3 is a sectional view taken along the line XX of the second embodiment of the packaging bag of the present invention, and is an example in which the heat-adhesive resin layer is composed of two layers, 6 and 7. It is the same as FIG. 2 except that the heat-adhesive resin layer is composed of two layers, and thus the description is omitted.

[0019]

The present invention will be described in more detail with reference to the following examples. Example 1 A beautiful pattern and mark printing were performed on the non-deposited layer surface of a 12 μm aluminum-deposited biaxially stretched polyethylene terephthalate film (deposited layer: 400 °) by a normal gravure printing method, and a heat-bonded area of the deposited surface (packaging bag) The inner bag size is 130mm x 180mm and the outer bag size is 140mm x 19
Gravure printing of a heat-adhesive resin layer with a mixed resin composition of a urethane resin and a vinyl chloride-vinyl acetate copolymer resin in register with the above-mentioned mark printing (formed with a width of 5 mm on the peripheral edge of the bag so that it becomes 0 mm) A laminate formed using the method was manufactured. Using this laminate, the heat-adhesive resin layers were thermally bonded by a sealing machine to produce a four-side-sealed packaging bag in which one side of the present invention was not thermally bonded. The dry coating amount of the heat-adhesive resin layer in this case was 5 g / m ² . Example 2 The thickness of the aluminum deposition layer was 200 °, 600 °, 80
Except for using three kinds of 12 μm aluminum-evaporated biaxially stretched polyethylene terephthalate films of 0 °, a four-sided sealed packaging bag was obtained in the same manner as in Example 1 except that one side of the present invention was not thermally bonded. . Example 3 A silicon oxide deposition layer was used instead of an aluminum deposition layer, and the thickness of the silicon oxide deposition layer was 200 °, 400 °,
Using four kinds of 12 μm silicon oxide-deposited biaxially stretched polyethylene terephthalate films of 600 ° and 800 °, beautiful patterns and marks are formed on the non-deposited layer surface of the 12 μm silicon oxide-deposited biaxially stretched polyethylene terephthalate film by a normal gravure printing method. Printed and heat-bonded area formation area on vapor deposition surface (bag size is 130mm when packaged)
X180mm, formed with a 5mm width on the periphery of the bag so that the bag outer dimension is 140mmx190mm) Polyester with isocyanate added to strengthen the adhesion to the deposited layer by registering with the mark printing A resinous composition is formed by gravure printing as a first layer of a heat-adhesive resin layer, and a second layer for providing a sealing property by heat sealing on the first layer is a polyester-based resin composition. The formed laminate was produced. Using this laminate, the heat-adhesive resin layers were thermally bonded by a sealing machine to produce a four-side-sealed packaging bag in which one side of the present invention was not thermally bonded. The first in this case
Layer, the coating amount of the dry second layer heat-adhesive resin layer of the first layer is 1 g / m ^2, the second layer was 6 g / m ^2. Comparative Example 1 After printing a beautiful pattern and mark on one surface of a 12 μm biaxially stretched polyethylene terephthalate film by a normal gravure printing method, an entire surface of the printing surface was coated with an anchor coating agent, and the anchor coating agent was coated. The high-pressure method low-density polyethylene is extruded with a thickness of 15 μm on the surface and the glossy surface of the aluminum foil of 7 μm, and lamination is performed. Thus, a comparative laminate was prepared. Using this comparative laminate, the heat-bonded area is heat-bonded with a sealing machine to form a packaging bag with a bag size of 130 mm × 18.
A four-side-sealed packaging bag, one side of which was not thermally bonded, was prepared so that the size of the bag was 0 mm and the outside dimensions of the bag were 140 mm × 190 mm.

Using the four-side sealed packaging bags of Examples 1, 2, 3 and Comparative Example 1, 23 g of a preparation containing L-menthol as a medicinal ingredient was filled into each, and then the opening (heat-bonded) was prepared. Not one side) sealed by thermal bonding
Five hermetically sealed sample bags were obtained. In addition, after filling 50 g of the plate chocolate into each of the four-sided sealing packaging bags, the opening (one side not thermally bonded) was sealed by thermal bonding to obtain five hermetically sealed sample bags.
The sealed sample bag is placed in an atmosphere at 37 ° C. for 60 hours.
After leaving for days, the container was opened and the retention of the initial concentration of L-menthol contained in the preparation was quantified by gas chromatography, and the results are shown in Table 1. It was measured after being left in an atmosphere at 37 ° C. for 60 days, and is shown in Table 2. The sealed sample bag was left in an atmosphere of 25 ° C. for 60 days, and then opened. The chocolate sample was checked for unpleasant taste and odor by sensory test.

[0021]

[Table 1] As is evident from Table 1, all the packaging bags of the present invention showed excellent results with little decrease in L-menthol in the preparation over time as compared with the conventional packaging bags. Although excellent results are obtained when the thickness of the vapor deposited layer is 400 ° or more, it is sufficiently good when the thickness is 600 ° or less in consideration of cost effectiveness.

[0022]

[Table 2] (Note) The unit of the adhesive strength is g / 15 mm width. "P
"Cut" means that the biaxially stretched polyethylene terephthalate film has been cut. As is clear from Table 2, although the packaging bag of the present invention has a slightly lower adhesive strength than the conventional packaging bag, the packaging bag of the present invention is particularly suitable for individual packaging and light-weight packaging. It shows the strength that can be used without any practical problems.

[0023]

[Table 3] As is clear from Table 3, the packaging bag of the present invention is an excellent packaging bag that does not transfer any off-flavor or odor to the contents as compared with the conventional packaging bag.

[0024]

The packaging bag of the present invention uses an inorganic vapor-deposited layer, such as aluminum, silicon oxide, or aluminum oxide, for the layer in contact with the content containing the scent or medicinal ingredient, and can be obtained from the results shown in Table 1 above. As is evident, as compared with the conventional high-pressure low-density polyethylene, the time-dependent decrease due to the adsorption of the fragrance and the medicinal component can be suppressed to almost perfection. As a result, it is not necessary to previously contain an excess amount of the trace amount of the active ingredient which will be adsorbed and reduced during the effective use period in accordance with the effective use period of the contents, and the cost associated therewith is increased. Can be prevented, and the quality stability of the contents can be improved. Further, as is clear from the results of Table 3 above, the packaging bag of the present invention can transfer almost any unusual taste or odor to foods such as chocolate, which are easily adsorbed. There is no excellent packaging bag. Further, conventional packaging bags for packaging contents containing fragrances and medicinal ingredients have a structure in which paper, aluminum foil, various plastic films, and the like are appropriately laminated, but the packaging bag of the present invention is made of an inorganic material. It consists of a single plastic film having a vapor-deposited layer, and has a simple configuration in which only a heat-adhesive resin layer is provided in a heat-adhesive portion forming region on the surface of the vapor-deposited layer of the inorganic substance, and is extremely cost-effective compared to conventional packaging bags. It is a superior packaging bag.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of one embodiment of a packaging bag according to the present invention.

FIG. 2 is a cross-sectional view taken along line XX of the first embodiment of the packaging bag according to the present invention.

FIG. 3 is a sectional view taken along line XX of a second embodiment of the packaging bag according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Inorganic vapor-deposited plastic film 3 Plastic film 4 Inorganic vapor-deposited layer 5, 6, 7 Thermal adhesive resin layer 8 Printing layer 9 Contents 10 Thermal adhesive part 11 Printed mark

Claims (6)

[Claims] 1. A layer in contact with the contents is composed of a single plastic film having an inorganic vapor-deposited layer formed thereon, and a heat-adhesive resin layer is provided in a heat-adhesive portion forming region on the surface of the vapor-deposited layer. A packaging bag characterized by being thermally bonded. 2. The method according to claim 1, wherein the plastic film is biaxially oriented polypropylene, biaxially oriented polyethylene terephthalate,
The packaging bag according to claim 1, wherein the packaging bag is made of a biaxially stretched plastic film such as a biaxially stretched polyamide. 3. The packaging bag according to claim 1, wherein said plastic film is made of a uniaxially stretched plastic film such as uniaxially stretched polypropylene or uniaxially stretched polyethylene. 4. The packaging bag according to claim 1, wherein said inorganic vapor-deposited layer is composed of an inorganic vapor-deposited layer such as aluminum, silicon oxide, and aluminum oxide. 5. The heat-adhesive resin layer is composed of a plurality of layers of different resins.
The packaging bag described. 6. A positioning mark is formed so as to be surely positioned and thermally bonded in the thermal bonding portion forming area provided with the thermal bonding resin layer. Item 6. The packaging bag according to any one of Items 1 to 5.