JPH0220666B2 - - Google Patents

Description

[Detailed description of the invention]

(Field of Industrial Application) The present invention relates to a deodorizing paint and a deodorizing sheet using the same, and more specifically, a deodorizing paint and a deodorizing sheet useful for painting various food containers, food packaging, or other deodorizing purposes. Regarding deodorizing sheets. (Prior Art) Conventionally, various foods, especially foods with strong aromas or odors, and other articles have been packaged using non-ventilated containers such as metal, plastic, or glass.
In simple cases, non-breathable packaging sheets (eg aluminum foil or plastic sheets) are mainly used. Furthermore, various deodorizing agents are used in places where odors tend to accumulate, such as the interior of automobiles, toilets, and refrigerators. (Problems to be Solved by the Invention) The various containers or packaging sheets used for conventional packaging of foods, etc., as described above, tend to lose the aroma of the foods, etc., or mix with aromas or odors from the outside. However, they are both more expensive than general packaging sheets. In addition, when the contents require air permeability in packaging, such as fresh food, conventional containers and packaging sheets that do not have air permeability cannot be used.
In addition, air-permeable containers and packaging sheets are powerless against food aromas or odors leaking outside or from external aromas or odors transferring to the food inside. Furthermore, it is not desirable from the aesthetic point of view or from the standpoint of space to place the deodorizer in a container in the interior of a car or elsewhere. Therefore, as packaging materials for various foods, there is a strong demand for packaging sheets that are air permeable to the outside but block only aromas or odors, and for deodorizers that do not create a strange feeling indoors. As a result of intensive research in response to the above-mentioned demands, the present inventor found that when applying a certain material to a general air-permeable packaging sheet or packaging container,
The present invention was completed after discovering that such conventional demands can be achieved. (Means for solving the problems) That is, the present invention provides an aromatic polycarboxylic acid,
This is a deodorizing sheet made by applying and/or impregnating a deodorizing paint consisting of a binder resin and a liquid medium onto a sheet, and then drying it. To explain the present invention in more detail, the aromatic polycarboxylic acids used in the present invention and which mainly characterize the present invention include, for example, phthalic acid, terephthalic acid, isophthalic acid, trimellitic acid, 1,2,
3-benzenetricarboxylic acid, 1,3,5-benzenetricarboxylic acid, pyromellitic acid, benzenehexacarboxylic acid, naphthalenedicarboxylic acid, naphthalenetricarboxylic acid, naphthalenetetracarboxylic acid, diphenyltetracarboxylic acid, dipphenyl ethertetracarboxylic acid and aromatic polycarboxylic acids such as azobenzenetetracarboxylic acid, or their anhydrides, and a particularly preferred aromatic polycarboxylic acid in the present invention is benzenetricarboxylic acid, particularly trimellitic acid. The deodorizing paint of the present invention can be obtained by mixing the above aromatic polycarboxylic acid, preferably benzenetricarboxylic acid, with a binder resin and a liquid medium. As the binder resin, for example, acrylic resins, vinyl acetate resins, and other resins used as binder resins in various conventional paints and printing inks are preferable, and these binder resins may be thermoplastic or thermosetting. As the liquid medium, water, alcohol-based, ketone-based, ester-based, aromatic-based, aliphatic-based, and other organic solvents, or mixtures thereof can be used. The concentration of the binder resin can be any concentration, but
Generally, about 10 to 30% by weight is preferred. These binder resins may be in a dissolved state in a liquid medium, or may be in a dispersed or emulsified state such as an emulsion. In the present invention, the above-mentioned aromatic polycarboxylic acid, preferably benzenetricarboxylic acid, is dissolved or dispersed in a liquid medium containing such a conventionally known binder resin to a concentration of about 10 to 30% by weight. obtained by. In addition, in the deodorizing paint of the present invention as described above,
Naturally, coloring agents such as dyes and pigments and other additives may be added. The deodorizing sheet of the present invention is obtained by coating and/or impregnating the deodorizing paint of the present invention as described above on one or both sides of a sheet such as general wrapping paper, plastic sheet, woven fabric, non-woven fabric, or a composite material thereof. It is then obtained by drying. The sheets used as base materials in the present invention include paper, perforated plastic sheets, woven fabrics, etc.
It is preferable to use a material with air permeability such as a non-woven fabric, but the material is not limited thereto, and non-breathable paper, processed paper, or plastic sheet may also be used. There are no particular restrictions on the amount of deodorizing paint applied and/or impregnated, but it is generally about 5 to 20g/approx.
^m2 , and in terms of aromatic polycarboxylic acid, it is about 1 to 10 g/ ^m2 , and by setting it within this range, wrapping paper, plastic sheets,
Excellent deodorizing effects can be imparted to sheets such as woven fabrics and nonwoven fabrics without losing their breathability. Note that the deodorizing paint may be applied and dried by any conventionally known method. (Function/Effect) The deodorizing sheet obtained using the deodorizing paint of the present invention as described above can block aromas or odors from external aromas or odors while retaining breathability. For example, even if several types of foods are packaged and placed in one place (for example, a refrigerator), the aromas or odors of those foods will not mix. Very useful for the purpose. In addition, such deodorizing sheets can be used as wallpaper in car interiors, toilets, work rooms with a lot of odors, floor coverings, etc., so that they do not impair the beauty of those rooms or create a strange feeling. The purpose of deodorization can be achieved. Next, the present invention will be explained in more detail with reference to Examples. Note that parts and percentages in the text are based on weight. Example 1 A deodorizing paint of the present invention was obtained by dissolving 15 parts of trimellitic acid in 60 parts of ethyl acetate/isopropyl alcohol (3/1) and 25 parts of nitrocellulose/alkyd resin (5/1). Next, this deodorizing paint was applied to kraft paper by gravure printing at a concentration of 8 g/m ² and dried to obtain a deodorizing sheet of the present invention. Next, cut this deodorizing sheet into 11cm diameter pieces and
ml Erlenmeyer flask and use it as a source of bad odor.
Using 100 ml of 210 ppm ammonia water, the concentration of bad odor was measured using a Kitagawa gas detection tube. The results were as follows.

[Table] Example 2 20 parts of 1,3,5-benzenetricarboxylic acid,
Dissolved in 60 parts of toluene/methyl ethyl ketone (1/1) and 20 parts of vinyl chloride/vinyl acetate copolymer,
A deodorizing paint of the present invention was obtained. Next, this deodorizing paint was applied to a soft vinyl chloride resin film by gravure printing at a concentration of 8 g/m ² and dried to obtain a deodorizing sheet of the present invention. Next, cut this deodorizing sheet into a diameter of 11 cm.
Hang it in a 300ml Erlenmeyer flask and use it as a source of bad odors.
Using 100 ml of 210 ppm ammonia water, the concentration of bad odor was measured using a Kitagawa gas detection tube. The results were as follows.

[Table] Example 3 15 parts of naphthalenetetracarboxylic acid, 35 parts of water and 50 parts of Crossrene 2M-38 (Takeda Pharmaceutical Co., Ltd.)
The deodorizing paint of the present invention was obtained by dissolving the deodorizing paint of the present invention. Next, this deodorizing paint is applied to the back side of the wallpaper, on which the beautiful pattern is printed, at a concentration of 8 g/m ² using an air knife coater, and is then dried to obtain the deodorizing wallpaper of the present invention. Ta. Next, cut this deodorizing wallpaper into a diameter of 11cm, and
ml Erlenmeyer flask and use it as a source of bad odor.
Using 100 ml of 210 ppm ammonia water, the concentration of bad odor was measured using a Kitagawa gas detection tube. The results were as follows.

[Table] When the above deodorizing wallpaper was used as wallpaper in a toilet, the ammonia odor in the toilet was significantly reduced. Example 4 A deodorizing paint of the present invention was obtained by dissolving 20 parts of diphenyltetracarboxylic acid in 50 parts of water and 50 parts of Crossrene 2M-38. Next, this deodorizing paint is applied to a floor covering made of polyester/polypropylene nonwoven fabric at a concentration of 8 g/m ² using an air knife coater to impregnate it, and dried to form a deodorizing floor covering of the present invention. Obtained. Next, cut this odor-enhancing floor covering into a diameter of 11 cm.
Hang it in a 300ml Erlenmeyer flask and use it as a source of bad odors.
Using 100 ml of 210 ppm ammonia water, the concentration of bad odor was measured using a Kitagawa gas detection tube. The results were as follows.

[Table] When the above floor covering was used as a floor covering for a passenger car, there was little accumulation of odor inside the car. Furthermore, when this bedding was cut into the shape of a foot and placed under the insole of a shoe, the odor of the shoe was significantly suppressed. Example 5 The deodorizing paint of Example 3 was sprayed onto the inner surface of cardboard at a rate of 10 g/m ² , dried, and used for transporting fresh fish and the like. In terms of preventing the bad odor of ammonia and trimethylamine peculiar to fresh fish, the blank achieved a sensory evaluation of 5, while the present invention achieved an effect of 2 to 1. Example 6 During the toilet paper manufacturing process, the deodorizing paint of Example 4 was impregnated with a roll coater at a rate of 5 g/m ² and dried to obtain the deodorizing toilet paper of the present invention. When the toilet paper was used in toilets, it was found to be extremely effective in removing ammonia odor from pumping toilets and flush toilets.

Claims (1)

[Scope of Claims] 1. A deodorizing paint comprising an aromatic polycarboxylic acid, a binder resin, and a liquid medium. 2. The deodorizing paint according to claim 1, wherein the aromatic polycarboxylic acid is trimethic acid. 3. The deodorizing paint according to claim 1, wherein the liquid medium is aqueous. 4. The deodorizing paint according to claim 1, wherein the liquid medium is oil-based. 5. A deodorizing sheet obtained by coating and/or impregnating a sheet with a deodorizing paint consisting of an aromatic polycarboxylic acid, a binder resin, and a liquid medium, and then drying the sheet.