JPH1159745A - Mothproof paper for packaging food and packaging case for food - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely use this paper material for a paper bag or case for food, by providing a print layer of the surface of a base material and an OP layer superposed on the print layer and formed on the surface of the base material so that the OP layer contains pyrone mothproof agent by a specified weight percent. SOLUTION: A print layer 2 is formed on the surface of a base material 1 and an OP layer 3 is formed on the whole face of the print layer 2, in this mothproof paper. Cardboard or cellophane paper is used for the base material 1. Pictorial patterns or letters are formed on the print layer 2 through offset printing. A dry film as thick as 1-2 μm is formed as the OP layer 3 by using a kind of ink containing a piron mothproof agent as much as 15-20 wt.% in a resin binder such as rosin phenol resin. This mothproof paper is used for packaging paper or a packaging box for food or the like, while exposing the OP layer 3 to the outside. In this way, the packaging paper is prevented from being bitten off and penetrated in by rice weevils and insect damage can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insect repellent paper for food packaging, and more particularly to an insect repellent paper having an excellent insect repellent effect on black elephants.

[0002]

2. Description of the Related Art Rice and confectionery are packaged in paper bags or paper boxes for sale or preservation, but when stored for a long period of time, worms may break through the wrapping paper and invade the inside, causing damage. is there. Such eating damage is not only unsanitary, but also leads to loss of commercial value, and thus its prevention is strongly desired.

[0003] In order to prevent the feeding damage of black elephants, insect-proof paper is used for the wrapping paper.
It is conceivable to divert the technology described in 199087 and the like. JP-A-6-199087 describes a document storage box made of insect-proof paper impregnated with essential oil extracted from moon peach leaves.

[0004]

However, the insect repellent paper described in Japanese Patent Application Laid-Open No. 6-199087 is used for a document storage box. It was not effective against insects and could not be used for food packaging. In addition, wrapping paper for packaging foods such as rice and confectionery,
Not only insect repellent effect but also safety for human body is required. The present invention has been made in view of the above circumstances, and provides an insect-proofed paper for food packaging that can be safely used for a paper bag or a paper box for food packaging and that can also prevent food damage such as worms. Aim.

[0005]

Means for Solving the Problems In order to achieve the above object, an insect-proofed paper for food packaging according to the present invention comprises a base material, a printed layer formed by printing on the surface of the base material, An OP layer formed on the surface of the base material, wherein the OP layer contains 15% to 20% by weight of a pyrone-based insect repellent.

In addition, the insect-proofed paper for food packaging according to the present invention can be configured such that the OP layer is formed by offset printing using the pyrone-based insect-controlling agent-containing ink (claim 2).

Further, a food packaging box according to the present invention is constructed by producing the insect-proofed paper for food packaging according to claim 1 or 2.

As the base material, a well-known material such as paperboard such as a manila ball or cellophane is used. The printing layer represents a pattern, a character, or the like, and is formed by printing, preferably, the same offset printing as that of the OP layer. In forming this printing layer, if necessary, the same offset ink containing a pyrone-based insecticide as in the OP layer is used.

The OP layer is formed to a thickness of 1 μm to 2 μm over the entire surface by offset printing (claim 2) or the like. This OP
For forming the layer, a composition (ink) containing 15% by weight to 20% by weight of a pyrone-based insect repellent in a resin binder is used to obtain an effective repellent effect without impairing printability such as offset printing, Rosin phenolic resin and the like are used as the resin binder, and Japanese Patent Publication Sho 52
No.-33 and Japanese Patent Publication No. 58-14437 are exemplified.

[0009]

In the insect-proofed paper for food packaging according to the present invention, since the outermost OP layer contains a pyrone-based insect repellent and can repel silkworms, it can prevent the damage of silkworms when food is packaged. In addition, the pyrone insect repellent conforms to the single dose toxicity test of the non-clinical test guideline for pharmaceuticals, so that the safety for the human body is also ensured.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional view of the insect-proofed paper for food packaging according to one embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a substrate, 2 denotes a printed layer formed on the surface of the substrate 1, and 3 denotes an OP layer formed on the entire surface of the substrate 1 on which the printed layer 2 is formed. As described above, the substrate 1 is made of paperboard or cellophane paper, and the print layer 2 is formed by printing a pattern, a character, or the like by offset printing.

The OP layer 3 is composed of a resin binder such as a rosin phenol resin and a pyrone insect repellent (compound) of 15% by weight or less.
It is formed to a dry film thickness of about 1 μm to 2 μm by offset printing using an ink containing 20% by weight. Pyrone insect repellents include non-clinical drug testing guidelines (1.
991) Single-dose toxicity study LD ₅₀ is 4000 mg / kg
, Specifically, Aninsen RV-2 (trade name, manufactured by Daiwa Chemical Industry Co., Ltd.) is used.

The insect-proofed paper according to this embodiment is used as a food wrapping paper or as a carton blank or the like to form a food paper box or the like, and the OP layer 3 containing a pyrone-based insecticide is provided on the outside. Expose and package the food. For this reason, the worms can be repelled, and the worms do not break through the packaging and enter the packaging, thereby preventing the worms from eating. Pyrone insect repellents are used in non-clinical drug testing guidelines (1991) single dose toxicity test L
Since D ₅₀ is about 4000 mg / kg, there is no adverse effects on the human body, excellent safety can be obtained.

The OP layer 3 is formed by offset printing using an ink containing a pyrone insecticide. Since the amount of the pyrone insecticide contained in the ink is 20% by weight or less, the OP layer 3 is suitable as an offset ink. , And formation by offset printing can be performed without hindrance.

[0014]

Next, examples of the present invention will be described in comparison with comparative examples. After the printing layer 2 is formed on the base material 1 by offset printing, the OP layer 3 is overlaid on the printing layer 2 and the dry film thickness is 1 g.
/ M ² and Examples 1 to 4 and Comparative Examples 1 to 4
4 was made. Examples 1 to 4 and Comparative Examples 1 to 4
The OP layer 3 was formed by offset printing using an ink in which a pyrone-based insect repellent was mixed in a resin binder shown in Table 1 below at a compounding ratio shown in Table 1.

[0015]

[Table 1]

Examples 1 to 4 and Comparative Examples 1 to 4
The insect-proofed paper was cut into pieces each having a size of 4 × 6 cm and folded in two. Twenty germ rice grains were put therein, and the periphery was sealed with a stapler to prepare a sample. Then, these samples were placed in a 5 × 7 × 2 cm plastic container, 20 worms were released, the animals were bred in a dark room at 25 ° C., and a few days later, a test for observing damage to the samples was performed. (N1, N2, N3) times.

The results of the test are shown in Table 2. The results are shown in Comparative Examples 3 and 4 containing no pyrone-based insecticide and Comparative Examples 1 and 2 containing the pyrone-based insecticide and having a content of 15% by weight or less. As for the samples, the worms penetrated the sample by making holes, but no holes were found in the samples according to Examples 1 to 4. However, in Examples 1 and 2, no damage was recognized, but in Examples 3 and 4 in which an acrylic ester-based ultraviolet curable resin was used as the resin binder, traces of damage were slightly observed on the outer surface.

[0018]

[Table 2]

In the above-described embodiment, whether the insect-proofed paper for food packaging according to the present invention is used for temporary packaging or secondary packaging is not described, but it is used for both primary and secondary packaging. Needless to say, it is also possible to make the insect-proof paper into a box and use it as a food packaging box.

[0020]

As described above, according to the insect-proofed paper (food packaging box) according to the present invention, since the outermost OP layer contains 15% by weight to 20% by weight of a pyrone-based insecticide, it is printed. An excellent repellent effect on the worms can be obtained without impairing the suitability, and it is possible to effectively prevent the damage by the worms when packing the food.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of an insect-proofed paper for food packaging according to an embodiment of the present invention.

[Explanation of symbols]

 1 base material 2 printing layer 3 OP layer

Claims (3)

[Claims] 1. A substrate comprising: a base material; a printing layer formed by printing on the surface of the base material; and an OP layer formed on the surface of the base material so as to overlap the printing layer, wherein the OP layer is a pyrone insect repellent. Insect repellent paper for food packaging, characterized in that the paper contains 15 to 20% by weight of an agent. 2. The method according to claim 1, wherein the OP layer is formed by offset printing using the pyrone-based insect repellent-containing ink.
2. The insect-proofed paper for food packaging according to 1 .. 3. A food packaging box formed from the food insect-proofed paper according to claim 1 or 2.