JPH0615675B2 - Deodorizing paint and deodorizing sheet using the same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a deodorizing paint and a deodorizing sheet using the same, and more specifically, for coating various food containers, for food packaging, or for other deodorizing purposes. The present invention relates to a deodorizing paint and a deodorizing sheet useful for.

(Prior Art) Conventionally, various foods, especially foods having a strong odor or odor, and other articles are not breathable, such as non-breathable containers such as metal, plastic, glass, etc. Packaging sheets without (for example, aluminum foil or plastic sheet) are mainly used. In addition, various deodorants are used in places where odor is likely to accumulate, such as interiors of cars, toilets, and refrigerators.

(Problems to be Solved by the Invention) Various containers or packaging sheets used for packaging foods such as those used for packaging conventional foods as described above lose the aroma of foods. It is intended to prevent odors, mixing with external scents or odors, or preventing the scents or odors of the contents from evaporating to the outside. And it is expensive. In addition, if the contents are breathable such as fresh food, the conventional non-breathable containers and packaging sheets cannot be used.
Further, a breathable container or packaging sheet is useless for leaking out the aroma or odor of food, transferring external aroma or odor to food inside, and the like. Further, it is not preferable in terms of aesthetics or space to dispose the deodorant in a container in the interior of an automobile or the like.

Therefore, as a packaging material for various foods, there is a strong demand for a packaging sheet that is breathable to the outside but that blocks out all the odors or odors, and a deodorant that does not give a strange feeling in the room.

As a result of earnest research to meet the above demands, the present inventor has achieved such conventional demands when a certain specific material is put on a general breathable packaging sheet or packaging container. That is, the present invention has been completed.

(Means for Solving Problems) That is, the present invention is a deodorizing paint comprising a deodorizing component, a binder resin and a non-aqueous solvate, wherein the deodorizing component is a ferrous salt and trimellitic acid or an anhydride thereof. A deodorizing paint comprising a salt, and a deodorizing sheet obtained by using the deodorizing paint.

The main feature of the present invention is that the above-mentioned ferrous salt and trimellitic acid are used in combination as a deodorizing component, and a non-aqueous liquid medium is used as a solvate.

That is, it is known in the prior art to use a ferrous salt as a deodorizing component of a deodorizing paint, but such a ferrous salt is used for various papers, plastic sheets, woven fabrics, non-woven fabrics or composites thereof. When applied and / or impregnated with, and dried by heating, the ferrous salt discolors to color the substrate sheets brown, and the deodorizing effect decreases,
Sheets, especially those that significantly reduce the commercial value of various printed sheets, in the present invention, by using such a ferrous salt in combination with trimellitic acid, The ferrous salt does not impair the deodorizing effect when dried, and there is little brown discoloration of the ferrous salt, and in combination with the deodorizing effect of trimellitic acid, the deodorizing effect is exerted more than the sum of the unique deodorizing effect of each compound. That is the knowledge.

Each of the individual deodorant compounds used in the present invention is a known compound, and various ferrous salts such as ferrous sulfate, ferrous chloride, and ferric phosphate are known as ferrous salts. Inorganic ferrous salts such as ferrous iron, ferrous nitrate, ferrous carbonate, organic ferrous acetate, ferrous oxalate, ferrous citrate, ferrous fumarate, ferrous formate, etc. Ferrous salts can be used, but particularly preferred is ferrous sulfate.

As for the deodorizing components composed of the ferrous salt and trimellitic acid as described above, their use ratio is also important, and the total amount is 10
If 0 part by weight, the ratio of trimellitic acid is 90 to 10 parts by weight with respect to 10 to 90 parts by weight of ferrous salt,
With such combinations and blending ratios, the object of the present invention is best achieved.

The deodorizing paint of the present invention can be obtained by mixing the deodorizing component as described above with a binder resin and a non-aqueous liquid medium.

As the binder resin, for example, acrylic resins, vinyl acetate resins, and other resins used as binder resins in various conventional water-based or oil-based paints and printing inks are preferable. These binder resins are thermoplastic or thermosetting. It can be sex.

As the liquid medium, alcohol-based, ketone-based, ester-based, aromatic-based, aromatic-based, other organic solvents, or a mixture thereof can be used.

The concentration of the binder resin may be any, but it is generally preferably about 10 to 30% by weight. These binder resins may be dissolved in a liquid medium, or may be dispersed or emulsified.

In the present invention, it is obtained by dissolving or dispersing the above deodorant component in a liquid medium containing such a conventionally known binder resin so as to have a concentration of about 10 to 30% by weight.

Further, it is a matter of course that a coloring agent such as a dye or a pigment may be added to the deodorizing coating material of the present invention as described above, and other additives for coating material.

The deodorizing sheet of the present invention is obtained by applying and / or impregnating the deodorizing coating composition of the present invention as described above on a general wrapping paper, a plastic sheet, a woven fabric, a non-woven fabric or one or both surfaces of a sheet such as a composite material thereof, It is then obtained by drying.

The sheet or the like used as the substrate in the present invention is preferably a sheet having air permeability such as paper, a perforated plastic sheet or a woven fabric, a nonwoven fabric, etc., but is not limited thereto, and a sheet having no air permeability, It may be processed paper or plastic sheet.

The coating and / or impregnation amount of the deodorizing paint is not particularly limited, but it is generally a solid content at a rate of about 5 to 20 g / m ² or about 1 to 10 g / m in terms of trimellitic acid. ²
And by setting such a range, wrapping paper,
An excellent deodorizing effect can be imparted without losing the air permeability of a sheet such as a plastic sheet, a woven fabric or a non-woven fabric. The deodorizing paint may be applied or dried by any conventionally known method.

(Function / Effect) The deodorizing sheet obtained by using the deodorizing coating material of the present invention as described above can keep the breathability and can block the aroma or odor from the external aroma or odor.
It is suitable for packaging foods with strong aroma or odor, for example, even if several foods are packaged and placed in one place (for example, a refrigerator), the aromas or odors of those foods do not mix. , Very useful for such packaging purposes.

In addition, such a deodorizing sheet does not impair the aesthetics of those rooms and does not give a sense of discomfort by being used as a wallpaper in a car room, a toilet, a wallpaper in a work room with a lot of odors, a floor covering, etc. Can achieve the purpose of deodorization.

Next, the present invention will be described more specifically with reference to examples. In the text, parts and% are based on weight.

Example 1 Ferrous sulfate and trimellitic acid 1 with a weight ratio of 10: 3
5 parts of ethyl acetate / isopropyl alcohol (3 /
1) Dissolved in 60 parts and 25 parts of nitrocellulose / alkyd resin (5/1) to obtain a deodorizing paint of the present invention. Next, this deodorizing paint was applied to kraft paper at 8 g / m ²
It was applied by gravure printing and dried to obtain the deodorizing sheet of the present invention.

Cut the deodorant sheet into a circle with a diameter of 11 cm, and cut it into 3
Hanging in a cap in a 00 ml Erlenmeyer flask,
The mouth was sealed with paraffin. 100 ml of 210 ppm ammonia water as a malodor source was put in this flask, and the ammonia (ppm) in the flask after a certain period of time was measured by the Kitagawa detection tube. The results were as follows.

1 day later 2 days later 9 days Blank 90 90 90 Invention product 30 15 10 Comparative Example 40 30 20 Note: The blank is a sheet using a paint with no deodorant component added, and in the comparative example, ferrous sulfate alone acts. It is an example.

In addition, a bag was prepared from each of the above-mentioned blang, the product of the present invention and the sheet of the comparative example, and the thawed small fish was put in the bag and allowed to stand, and after 3 days, the bag was opened. While the malodor in the prepared bag was slight, in the case of the blank and the comparative example, the severe malodor spread.
The sheet of Comparative Example was strongly colored brown, whereas the sheet of the present invention was hardly colored.

Examples 2 to 4 Deodorizing sheets of the present invention were obtained in the same manner as in Example 1 except that the following components were used, and the performance was measured in the same manner as in Example 1 and the results were as follows.

Example 2 8: 2 mixture of ferrous sulfate and trimellitic anhydride 1 day 2 days 9 days blank 90 90 90 Invention product 30 17 12 Comparative Example 40 31 21 Example 3 Ferrous sulfate and potassium trimellitate 5: 5 mixture 1 day 2 days 9 days blank 90 90 90 invention product 30 16 10 comparative example 40 31 20 Example 4 7: 3 mixture of ferrous sulfate and trimellitic acid 1 day 2 days 9 days blank 90 90 90 Invention product 30 15 10 Comparative Example 40 30 21 Example 5 20 parts of a 4: 5: 1 mixture of ferrous sulfate, trimellitic acid and lithium trimellitic acid, and 60 parts of toluene / methyl ethyl ketone (1/1) And vinyl chloride copolymer 20
Dissolved in the same area to obtain the deodorizing paint of the present invention.

Next, this deodorizing paint was applied and impregnated on a polyester / polypropylene non-woven fabric by gravure printing so as to be 8 g / m ² , and dried to obtain a deodorizing sheet of the present invention.

Cut the deodorant sheet into a circle with a diameter of 11 cm, and cut it into 3
The suspension was suspended in a 00 ml Erlenmeyer flask in a cap shape and the mouth was sealed with paraffin. The flask contained 100 ml of 210 ppm ammonia water as a malodor source, and the ammonia (ppm) in the flask after a certain period of time was measured with a Kitagawa type detection tube. The results are as follows.

1 day 2 days 9 days Blank 90 90 90 Invention product 30 15 9 Comparative Example 40 30 22 Example 6 The deodorizing paint of Example 1 was applied to the inner surface of the cardboard paper in an amount of 10 g.
Sprayed at a ratio of / m ² , dried, and used for transportation of fresh fish and the like. With respect to the prevention of the bad odor of ammonia and trimethylamine, which are peculiar to fresh fish, the blank was 5 in the sensory evaluation, while the effects of 2-1 were obtained in the present invention.

Example 7 The deodorizing paint of Example 2 was impregnated with a roll coater at a rate of 5 g / m ^{2 in} a toilet paper manufacturing process and dried to obtain a deodorant toilet paper of the present invention. When this toilet paper was put to use in a toilet, it exerted a remarkable effect in removing the deodorizing odor of a drawing toilet and a flush toilet.

Claims (4)

[Claims] 1. A deodorizing paint comprising a deodorizing component, a binder resin and a non-aqueous liquid medium, wherein the deodorizing component comprises a ferrous salt and trimellitic acid or its anhydride or its salt. . 2. A deodorizing component is 10 to 90 parts by weight of a ferrous salt and trimellitic acid or its anhydride or its salt 9
The deodorizing paint according to claim (1), which comprises 0 to 10 parts by weight. 3. A deodorizing sheet obtained by applying and / or impregnating a deodorizing paint comprising a deodorizing component, a binder resin and a non-aqueous liquid medium on a sheet, and then drying the sheet, wherein the deodorizing components are ferrous salt and trimellitic acid. Alternatively, a deodorizing sheet comprising an anhydride or a salt thereof. 4. A deodorizing component is 10 to 90 parts by weight of ferrous salt and trimellitic acid or its anhydride or its salt 9.
The deodorizing sheet according to claim (3), which comprises 0 to 10 parts by weight.