WO2019074034A1

WO2019074034A1 - Method for manufacturing mildewproof sheet and packaging material

Info

Publication number: WO2019074034A1
Application number: PCT/JP2018/037840
Authority: WO
Inventors: 喜一山田
Original assignee: 山進社印刷株式会社
Priority date: 2017-10-11
Filing date: 2018-10-11
Publication date: 2019-04-18
Also published as: JPWO2019074034A1; JP7178106B2; PH12019502735A1; CN110730749A

Abstract

This method for manufacturing a mildewproof sheet comprises: a step A of preparing a printing ink containing a mildewcide, and a base material sheet; and a step B of printing the base material sheet with at least one of a character, a graphic, and a pattern by intaglio printing using the printing ink. This packaging material comprises a mildewproof sheet in which at least one of a character, a graphic, and a pattern is printed on a surface of a base material sheet using a printing ink containing a mildewcide.

Description

Method for producing mold-proof sheet and packaging material

TECHNICAL FIELD The present invention relates to a method of manufacturing a mold-proof sheet capable of suppressing the generation of mold and a packaging material.

In recent years, many of the daily necessities, furniture, or clothing accessories such as clothes, shoes, and accessories distributed in Japan are produced overseas and are imported overseas after being produced overseas. Although many of the clothes are imported from, for example, Southeast Asian countries, there is a storage problem because the climate in such areas tends to be hot and humid. In other words, imports of clothing from the countries of Southeast Asia are mostly transported by sea, and it takes about one month for transportation, during which clothing is stored in containers. Then, due to the high temperature and humidity environment in the container, mold may be generated in the clothes and there is a problem that the value as a product is lost.

Although the above-mentioned clothes etc. are usually covered with a film sheet or put in a plastic bag, the film sheet and the plastic bag etc. are for the purpose of dirt prevention and quality maintenance, and the effect of preventing mold There is almost no Then, it is possible to aim at mold prevention of a fashion item by giving a mold-proof effect to a film sheet etc. For example, Patent Document 1 discloses an antifungal sheet comprising an antifungal layer containing an antifungal agent, a binder resin, and a fat and oil component.

JP, 2015-193606, A

The antifungal sheet described in Patent Document 1 is obtained by forming an antifungal layer containing an antifungal agent, a binder resin, and a fat and oil component on a substrate sheet, and from the preparation of a composition for forming the antifungal layer. The process to coating to a base material sheet and drying is required. In addition, the antifungal layer is provided on a part or the entire surface of the base sheet, which is disadvantageous in terms of material cost and manufacturing cost.

The present invention has been made in view of the above-described conventional problems, and an object thereof is to easily manufacture at low cost a packaging material capable of suppressing the occurrence of mold and a mold-proof sheet used for the packaging material. To provide a manufacturing method that can

The present invention for solving the above-mentioned problems is as follows.
(1) Step A of preparing a printing ink containing a fungicide and a substrate sheet
Step B of printing at least one of characters, figures and patterns on the substrate sheet using printing ink by intaglio printing;
A method of producing a mold-proof sheet, including:

(2) In the case of the above-mentioned (1), the printing ink contains 1 to 5% by mass of the antifungal agent in the case of an aqueous ink, and 5 to 8% by mass of the antifungal agent in the case of a solvent ink. How to make mold sheet.

(3) The prevention according to the above (1) or (2), wherein the depth (plate depth) of the concave portion holding printing ink corresponding to characters, figures and patterns of the intaglio used for intaglio printing is 15 to 25 μm. How to make mold sheet.

(4) In the step B, the printing is performed such that the total area of the printing area with the printing ink is 50 to 100% of the area of the entire substrate sheet. How to make mold sheet.

(5) A packaging material comprising a mildew proofing sheet in which at least one of characters, figures and patterns is printed on the surface of a substrate sheet by a printing ink comprising a mildew proofing agent.

(6) The packaging material according to (5), wherein the total area of the printing area by the printing ink is 50 to 100% of the area of the entire substrate sheet.

(7) The packaging material as described in said (5) or (6) in which the mold-proof sheet | seat is formed in bag shape.

(8) A printing area with printing ink is provided on the inner side surface of the bag-shaped anti-mold sheet, and the total area of the printing area is 50 to 70% of the entire area of the inner surface of the anti-mold sheet The packaging material as described in 7).

ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method which can manufacture easily the packaging material which can suppress generation | occurrence | production of mold, and the mold-proof sheet | seat used for the packaging material at low cost can be provided.

FIG. 1: is sectional drawing which shows typically an example of the packaging bag of this embodiment. FIG. 2: is a drawing substitute photograph which shows the evaluation test result of Example 2 (a) and Comparative Example 2 (b).

<Method of producing mold-proof sheet>
The method for producing an antifungal sheet of the present embodiment comprises the steps of preparing an ink containing an antifungal agent, a substrate sheet, and the printing ink, wherein at least one of characters, figures and patterns on the substrate sheet. And B. printing seeds by intaglio printing.
Below, each process is demonstrated.

[Step A]
Step A is a step of preparing a printing ink containing a fungicide and a substrate sheet.

(Printing ink)
The printing ink is an ink used for intaglio printing (gravure ink) to which at least a fungicide is added. The printing ink may be a solvent ink or an aqueous ink. As the printing ink, for example, one obtained by adding a fungicide to a commercially available ink for intaglio printing or gravure printing can be used. As a commercially available printing ink, examples of solvent ink include "YS-10 ink" (co-developed product of Osaka Printing Ink Mfg. Co., Ltd. and Yamashinsha Printing Co., Ltd.), white ink of other manufacturers, etc. . As water-based ink, "YS ink" (same co-developed product as described above) and the like can be mentioned.

In the manufacturing method of the present embodiment, at least one of characters, figures, and patterns is printed using printing ink, and from that viewpoint, it is preferable that the printing ink has a visible color. However, in the case where only the antifungal effect is the purpose, it may be transparent.

When titanium oxide or tungsten oxide (WO ₃ ) is added to the printing ink, functions as photocatalysts such as deodorizing, deodorizing, antibacterial, and sterilization can be imparted. In the case of white gravure ink, many white pigments contain titanium oxide as a white pigment, but when titanium oxide is added as a photocatalyst, a large amount (30% by mass or more) is required as compared to the case of using white pigment.
In addition, various additives such as a dilution solvent and an ink auxiliary may be contained in the printing ink as long as the effects of the present invention are not impaired.

The antifungal agent is not particularly limited as long as it can be added to the printing ink, and an inorganic antibacterial agent, an organic antibacterial agent, an organic-inorganic mixed antibacterial agent and the like can be used, and each of them is commercially available. be able to. As an example, Sanshinsha Printing Co., Ltd. product, SAN-N-DS, Japan Nanocoat Co., Ltd. product, antifungal agent photocatalyst agent AS-VT-W10 etc. are mentioned.

The content of the antifungal agent in the printing ink is preferably 1 to 5% by mass in the case of water-based ink, and preferably 5 to 8% by mass in the case of solvent ink, from the viewpoint of sufficiently exhibiting the antifungal effect.

The preparation of the printing ink containing the antifungal agent can be performed as follows. That is, when the antifungal agent dissolves in the printing ink, the antifungal agent may be added to the printing ink and stirred to dissolve while appropriately adjusting the temperature of the printing ink. Similarly, when the antifungal agent is insoluble in the printing ink, the antifungal agent is added to the printing ink while appropriately adjusting the temperature of the printing ink, and the dispersing treatment using a dispersing machine is performed if necessary. It is good.

(Base sheet)
As the base sheet, a resin sheet having low hygroscopicity is preferable. Examples of the resin include polyolefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate, and polyamide resins such as nylon-6 and nylon-66.
As the polyethylene, any of low density polyethylene (hereinafter referred to as "LDPE") and high density polyethylene (hereinafter referred to as "HDPE") can be used. And when using water-based ink, in order to acquire sufficient mold-proof effect, it is preferred to use a substrate sheet of LDPE. On the other hand, in the case of using a solvent ink, both of the base sheet of LDPE and the base sheet of HDPE can sufficiently obtain the antifungal effect.
Moreover, as polypropylene, non-oriented polypropylene (CPP) and biaxially oriented polypropylene (OPP) are mentioned.

There is no limitation in particular about the color of a substrate sheet. In order to make characters, figures, and patterns printed using printing ink stand out, set each combination as appropriate, so that the color of the substrate sheet and the color of printing ink have a complementary color relationship. Is preferred.

There is no limitation in particular also about the size of a substrate sheet, and it can set up suitably according to the size or use of a thing to be packed.

If both the printing ink and the base sheet contain organic stains, predetermined additives and the like, they may become a nutrient source of mold, so there is a concern that the antifungal effect may be reduced. Therefore, it is preferred not to include such dirt and additives. Examples of the additives include those generally used as a nutrient source of mold, and examples thereof include starch, saccharides, proteins and the like.

[Step B]
Step B is a step of printing at least one of characters, figures and patterns on the substrate sheet by intaglio printing using a printing ink.

In step B, intaglio printing (gravure printing) is particularly adopted as a printing method for the base sheet. The intaglio used for intaglio printing has a recess of a certain depth for holding printing ink, and the recess holds a sufficient amount of printing ink. As a result, a sufficient amount of printing ink is printed on the substrate sheet by intaglio printing, and a sufficient amount of the antifungal agent is applied to the surface of the substrate sheet, and a sufficient antifungal effect can be exhibited. . Further, the amount of the fungicide applied to the substrate sheet can be adjusted in accordance with the depth (plate depth) or the area of the concave portion corresponding to the characters, figures and patterns in the intaglio.
Intaglio printing is known, and intaglio printing on a substrate sheet using the printing ink can be carried out according to a standard method.

In the intaglio used for intaglio printing, the depth of the recess for holding printing ink corresponding to characters, figures and patterns is preferably 15 to 25 μm. By setting the depth of the concave portion to 15 to 25 μm, an appropriate amount of printing ink capable of exerting the antifungal effect is printed on the substrate sheet. The recesses of the intaglio can be formed using cylinder engraving or laser engraving.

Characters, figures and patterns to be printed can be appropriately set as desired. Examples of characters include a trade name and a display indicating that the composition has an antifungal effect. In addition, examples of figures and patterns include striped checkered checkerboards and so on. Furthermore, characters, figures and patterns can be combined with a plurality of them. The figure to be printed also includes solid (solid printing). That is, the entire surface of the base sheet may be used as the printing area.
In addition, characters, figures and patterns may themselves be formed by printing ink, or may be solid printing in which letters, figures and patterns are formed as cutouts.

In the step B, printing is preferably performed so that the total area of the printing area with the printing ink is 50 to 100% of the area of the entire substrate sheet. By printing as such, it is possible to impart a sufficient antifungal effect to the antifungal sheet. In the case of less than 100%, printing ink can be saved as compared with the case of solid coating.

In the step B, although printing on the substrate sheet may be performed on only one side, printing may be performed on both sides if necessary.

The antifungal sheet of the present embodiment can be used as a packaging material as described below, and can be used as it is, in a folded state, or in a state of being randomly rolled. By setting the anti-mold sheet in such a state in a state in which the anti-mold object is in contact with or in proximity to an anti-mold object (such as clothing), the generation of mold can be suppressed.

<Packaging material>
The packaging material of the present embodiment is characterized by including a mold-proof sheet in which at least one of characters, figures and patterns is printed on the surface of a base sheet by a printing ink containing a mold-proof agent.
The anti-mold sheet in the packaging material of the present embodiment is equivalent to the anti-mold sheet produced by the method for producing the anti-mold sheet of the present embodiment described above. Therefore, the contents described in the method for producing the antifungal sheet of the present embodiment described above are valid as they are as the contents of the antifungal sheet in the packaging material of the present embodiment. Hereinafter, the packaging material of this embodiment containing the said mold-proof sheet | seat is demonstrated.

As a shape of the packaging material of this embodiment, a sheet form, a bag form, etc. are mentioned. The sheet-like packaging material can be used, for example, in the form of winding the antifungal sheet as it is and wrapping the outer periphery of the antifungal object several times. Moreover, a bag-like packaging material is obtained by forming (processing) a mold-proof sheet | seat in bag shape. As means for processing the mold-proof sheet into a bag-like shape, known means for processing a vinyl sheet or the like into a bag-like shape can be applied.

In the packaging material of the present embodiment, from the viewpoint of exhibiting a sufficient antifungal effect, the total area of the printing region with printing ink is preferably 50 to 100% of the total area of the base sheet.

In the bag-like packaging material, it is preferable to provide the printing area with the printing ink on the inner side from the viewpoint of preventing the mold against the contents. That is, when producing a bag-like packaging material, it is preferable to process the base sheet after printing into a bag shape with the printing area inside. In that case, the total area of the printing area is preferably 50 to 70% of the entire area of the inner surface, from the viewpoint of saving the printing ink while sufficiently exhibiting the antifungal effect.
An example is shown in FIG. In the bag-like packaging material 10 shown in FIG. 1, the printing area 14 is formed inside the anti-mold sheet 12 processed into a bag shape, and the total area of the printing area 14 is 70% of the entire inner surface of the packaging material 10 It is. That is, the entire inner side of the packaging material 10 is the printing area, and the other surface is the printing area of 40%, and the area of 70% of the entire inner surface of the packaging material 10 is the printing area It is eggplant.

In the bag-like packaging material, an OPP film or a CPP film may be heat-sealed by a melt-cut seal so that a tape can be attached to the one with a header.

In the packaging material of the present embodiment, when the transparency of the substrate sheet is high, characters, figures, patterns and the like may be printed as mirror images. In this case, a positive image can be visually recognized by penetrating the substrate sheet from the opposite side of the printing surface. For example, in the case where the packaging material of the present embodiment is in the form of a bag, it is necessary to provide a printing area on the inner side in order to exert a mold-proof effect on the contents. In that case, by printing a mirror image, characters and the like can be visually recognized as an image from outside.

Although there is no limitation in particular as to-be-packaged object used as the object of the packaging material of this embodiment, For example, as mentioned above, daily necessities, furniture, an electric appliance, or clothing accessories, such as clothes, shoes, accessories, etc. are mentioned.

Hereinafter, the present embodiment will be described in more detail by way of examples, but the present embodiment is not limited to these.

Example 1
First, an antifungal agent (Yamashin Co., Ltd.) with respect to 1000 g of water-based ink (Osaka Printing Ink Mfg. Co., Ltd., YS Ink (co-developed product of Osaka Printing Ink Co., Ltd. and Yamashin Co., Ltd. Printing Co., Ltd.)). 30 g of SAN-N-DS (organic antibacterial agent) manufactured by Printing Co., Ltd. was added to prepare a printing ink containing 2.9% by mass of an antifungal agent, and a polyethylene sheet of 1000 cm × 3000 m as a base sheet. (HDPE) was prepared.

Next, the above-mentioned printing ink was set in a gravure printing machine, and the entire surface was solidly printed on the above-mentioned substrate sheet, with a part of the printing ink as a character ("Anti-mold MADE IN JAPAN"). The depth (plate depth) of the concave portion of the plate cylinder (intaglio) set in the gravure printing press was 18 μm. The mold-proof sheet was produced as mentioned above. In addition, the total area of the printing area by printing ink was 98% of the area of the whole base material sheet.

Comparative Example 1
The following evaluation test was performed in the state as it was, without printing by printing ink with respect to the base material sheet used in Example 1. FIG.

(Evaluation)
The following mold resistance test was performed using the anti-mold sheet obtained in Example 1 and the base sheet of Comparative Example 1.
First, the mineral salt agar medium components shown in Table 1 below are subjected to heat treatment at 121 ° C. for 20 minutes in a petri dish, and 0.01% aqueous sodium hydroxide solution is added to adjust the pH to 6.0 to 6.5. It was adjusted. Thereafter, evaluation was performed under the following culture conditions.
<Culture conditions>
Incubator: circulator with temperature / humidity thermostat Temperature: 28-30 ° C
Humidity: 85% RH or more Culture period: 28 days

A shirt enclosed in a plastic bag was prepared, and the mold-proof sheet (the base sheet of Comparative Example 1) and the petri dish in which the inorganic salt agar medium was generated as described above were placed in the plastic bag. Then, under the above culture conditions, for 28 days, the occurrence of mold in the petri dish was observed. Then, when the number of culture days was 7 days, 14 days, 21 days, and 28 days, the ratio of the area in which mold grew to the entire culture medium in the petri dish was calculated. Based on the calculated area, “0” when no bacteria is generated at all, “1” when the growth area ratio is less than 10%, “2” when 30% or more and less than 30% are “2”, 30% or more 60 The case of less than% was evaluated as "3", and the case of 60% or more as "4". The evaluation results are shown in Table 2.

From Table 2, it can be seen that in Example 1, no mold was observed after 28 days. On the other hand, in Comparative Example 1, it can be seen that mold increases with time.

[Example 2, Comparative Example 2]
First, for 1000 g of water-based ink (YS ink (co-developed product of Osaka Printing Ink Manufacturing Co., Ltd. and Yamashinsha Printing Co., Ltd.)), an antifungal agent (SAN Shinsha Printing Co., Ltd. SAN-) 30 g of N-DS (organic antibacterial agent) was added to prepare a printing ink containing 2.9% by mass of a fungicide. Moreover, the polyethylene film (LDPE) of 50 mm x 50 mm x 0.02 mm (thickness) was prepared as a base material sheet.

Next, the above-mentioned printing ink was set in a gravure printing machine, and the entire surface was solidly printed on the above-mentioned substrate sheet, with a part of the printing ink as a character ("Anti-mold MADE IN JAPAN"). In addition, the depth of the recessed part of the plate cylinder (intaglio) set to the gravure printing machine was 20 micrometers. The mold-proof sheet was produced as mentioned above. In addition, the total area of the printing area by printing ink was 98% of the area of the whole base material sheet.

The evaluation test was performed according to method A of "JIS Z 2911: 2010 Mold resistance test method Annex A (standard) test of plastic product". However, the antifungal sheets (sheets) were not cleaned, and the tests were conducted only in the fungal inoculation category. The photograph which image | photographed the state four weeks after is shown to Fig.2 (a).

Comparative Example 2
The printing with the printing ink was not performed, and the substrate sheet shown in Example 2 was used as it was, and subjected to the same evaluation test as in Example 2. The photograph which image | photographed the state four weeks after is shown in FIG.2 (b).

[Example 3]
First, for 1000 g of water-based ink (YS ink (co-developed product of Osaka Printing Ink Manufacturing Co., Ltd. and Yamashinsha Printing Co., Ltd.)), an antifungal agent (SAN Shinsha Printing Co., Ltd. SAN-) 30 g of N-DS (organic antibacterial agent) was added to prepare a printing ink containing 2.9% by mass of a fungicide. Moreover, the polyethylene film (LDPE) of 100 mm x 100 mmx0.03 mm (thickness) was prepared as a base material sheet.

Next, the printing ink was set in a gravure printing press, and printing was performed on the base sheet in the same manner as in Example 1. However, the plate cylinder (intaglio) set in the gravure printing machine used had a recess depth (plate depth) of 20 μm. The mold-proof sheet was produced as mentioned above. In addition, the total area of the printing area by printing ink was 98% of the area of the whole base material sheet.

Example 4
First, for 1000 g of solvent ink (YS-10 ink (co-developed product of Osaka Printing Ink Manufacturing Co., Ltd. and Yamashinsha Printing Co., Ltd.)), an antifungal agent (Yamashinsha Printing Co., Ltd.) 80 g of SAN-FHO (organic antibacterial agent) was added to prepare a printing ink containing 7.4% by mass of a fungicide. Moreover, the polyethylene film (LDPE) of 100 mm x 100 mmx0.03 mm (thickness) was prepared as a base material sheet.

Next, printing was performed on the base sheet in the same manner as in Example 3 using the solvent ink.

[Example 5]
First, for 1000 g of solvent ink (YS-10 ink (co-developed product of Osaka Printing Ink Manufacturing Co., Ltd. and Yamashinsha Printing Co., Ltd.)), an antifungal agent (Yamashinsha Printing Co., Ltd.) 80 g of SAN-FHO (organic antibacterial agent) was added to prepare a printing ink containing 7.4% by mass of a fungicide. In addition, a polyethylene film (HDPE) of 100 mm × 100 mm × 0.03 mm (thickness) was prepared as a substrate sheet.

Comparative Example 3
The following evaluation test was performed in the state as it was, without printing by printing ink with respect to the base material sheet used in Example 1. FIG.

(Evaluation)
The following mold resistance test was conducted using the antifungal sheet obtained in Examples 3 to 5 and the base sheet of Comparative Example 3.
Prepare a cotton cloth piece of 30 mm × 30 mm × 0.7 mm (thickness), and use this cotton cloth piece as specified in Method A of “JIS Z 2911: Test method for mold resistance test Annex A (standard) plastic products”. The mixed spore suspension was sprayed. Next, the piece of fabric is air-dried overnight to evaporate the water, and then wrapped in the above-mentioned antifungal sheet (comparative example 3 is a base sheet) and placed on a 50 mm × 50 mm × 3 mm (thickness) glass plate did. Then, the cells were cultured for 4 weeks under the conditions defined in the above-mentioned method A. However, inorganic salt agar medium was not used. After incubation, the cloth pieces were taken out and the growth rate of mold was evaluated on the surface of the cloth pieces. Specifically, it was evaluated according to the following evaluation criteria.
(Evaluation criteria)
0: No growth of mold observed with naked eye and under a microscope.
1: No growth of mold is observed with the naked eye, but clearly visible under a microscope.
2: Mold growth is visually observed, and the growth area is less than 25% of the total area of the sample (substrate sheet).
3: Mold growth was visually recognized, and the growth portion was 25% or more and less than 50% of the total area of the sample (substrate sheet).
4: Mycelium grows well, and the area of the growth portion is 50% or more of the total area of the sample (substrate sheet).
5: Mycelial growth is intense and covers the entire sample (substrate sheet).
The evaluation results are shown in Table 3.

From Table 3, in Examples 3 to 5, no growth of mold was observed with the naked eye or under a microscope, while in Comparative Example 3, the mycelium of mold grew well enough to be visible with the naked eye, The area of the portion covered 50% or more of the total area of the base sheet.

From the above results, it was shown that the occurrence of mold is suppressed more than in the mold-proof sheet of the present embodiment. Therefore, it is thought that the packaging material produced using the said mold-proof sheet | seat also exhibits the same mold | moment suppression effect.

10 Packaging bag 12 Anti-mold sheet 14 Printing area

Claims

Step A of preparing a printing ink containing an antifungal agent and a substrate sheet
Step B of printing at least one of characters, figures and patterns on the substrate sheet by intaglio printing using the printing ink
A method of producing a mold-proof sheet, including:
The antifungal sheet according to claim 1, wherein the printing ink contains 1 to 5% by mass of the antifungal agent in the case of an aqueous ink and 5 to 8% by mass of the antifungal agent in the case of a solvent ink. Production method.
The method for producing a mold-proof sheet according to claim 1 or 2, wherein a depth (plate depth) of a concave portion holding printing ink corresponding to characters, figures and patterns of the intaglio used for the intaglio printing is 15 to 25 μm.
The anti-mold sheet according to any one of claims 1 to 3, wherein in the step B, the total area of the printing area by the printing ink is 50 to 100% of the area of the entire base sheet. Manufacturing method.
A packaging material comprising an antifungal sheet, wherein at least one of characters, figures and patterns is printed on the surface of a substrate sheet by a printing ink containing an antifungal agent.
The packaging material according to claim 5, wherein the total area of the printing area by the printing ink is 50 to 100% of the area of the entire base sheet.
The packaging material according to claim 5 or 6, wherein the mold-proof sheet is formed in a bag shape.
The printing area with the printing ink is provided on the inner side surface of the mold-proof sheet formed into a bag shape, and the total area of the printing area is 50 to 70% of the area of the entire inner side surface of the mold-proof sheet. The packaging material as described in 7.