JPH01239200A - Deodorizing paper - Google Patents

Abstract

PURPOSE:To obtain a deodorizing paper capable of effectively removing a nitrogen-containing based offensive odor such as ammonia or amines occurring from a factory, poultry farm, toilet, etc., by applying a slurry obtained by suspending an inorganic substance having a solid acid into a specific aqueous solution to a paper. CONSTITUTION:A slurry obtained by suspending (A) inorganic substance (e.g., silica or alumina) having a solid acid into an aqueous solution containing (B) dispersing agent (preferably sodium pyrophosphate) and (C) adhesive (preferably rubber emulsion) is applied to a paper, preferably in 10-30mu thickness to provide the aimed deodorizing paper. Furthermore, the above-mentioned components id blended at amounts of 0.2-0.3pts.wt. of the component B and 10-15pts.wt. of the component C based on 100pts.wt. of the component A.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a filter paper for removing bad odors, and particularly to a filter paper that adsorbs nitrogen compounds such as ammonia and amines very well.

[Conventional technology]

A high-performance deodorizer is needed to prevent bad odors from being generated outdoors in factories, poultry farms, pig farms, human waste processing plants, garbage dumps, etc., and indoors from toilets, closet bathtubs, etc., which can disturb a comfortable living environment. is required.

Further, some kind of deodorizing measure is also required for body odor and the like generated in closed spaces such as nursing homes, diving facilities, and automobiles.

For this reason, both in the East and the West, methods have been widely used to reduce discomfort by using perfumes, scented oils, and so-called pleasant incense, such as incense.Recently, activated carbon has been used to physically absorb The reaction adsorption method using chemical substances has been put into practical use.

The former is a method that takes advantage of the large specific surface area of activated carbon, while the latter is a method that converts the malodorous components themselves into other chemical components, which generally requires large equipment and is used as a countermeasure against malodors in factories. ing.

[Problem to be solved by the invention]

Activated carbon has the disadvantage that its adsorption capacity per unit weight change is small, and that adsorbed odors are desorbed. On the other hand, as chemical reaction adsorbents, there are known ones that combine ascorbic acid and iron, and those that fix hypochlorous acid, but the former is expensive, and the latter generates warm chlorine. Therefore, its uses are limited.

Since these deodorizers are in the form of granules or powder, they tend to be difficult to handle for specific purposes, and are therefore difficult to handle. Attempts have also been made to create products with easy-to-handle shapes by filling them into containers, and some products have already been put into practical use.

Recently, research and development has been conducted on wrapping paper, wallpaper, etc. mixed with these deodorizing agents, but the current deodorizing agents have various drawbacks as mentioned above, and it is expected that a deodorizing agent that solves these problems will appear. It is.

The present invention aims to provide a deodorizing agent that can meet the above needs.

[Means to solve the problem]

The inventors of the present invention have repeatedly conducted experiments to solve these conventional drawbacks, and as a result, we have discovered that a solid acid with strong adsorption power for ammonia, amines, etc., which are the sources of bad odors, has an extremely excellent deodorizing effect. They focused on the fact that this solid acid is applied to paper together with a dispersant and an adhesive, and found that the paper is excellent as a deodorizing paper that removes malodor components.The present invention was thus completed.

That is, the present invention is a deodorizing paper made of paper coated with a slurry in which a solid acidic inorganic substance is suspended in an aqueous solution containing a dispersant and a binder.

[Effect]

Examples of the inorganic substance having solid fluorine used in the present invention include silica, alumina, zeophyte, clay minerals, and the like. Among these, silica and alumina (especially r-A40
(m) alone has solid acidity, but oxide threads made of a combination of both exhibit even higher acidity, and are generally used in many cases as a 1-layer tactile material. Zeolites and clay minerals also form solid acids by acid treatment, and become inorganic substances with solid acidity that can be used in the present invention.

Generally, zeophyte and clay minerals have a long crystal structure (cavity,
1 state) and cation exchange! *It is often used as an adsorbent because of its ability. However, usually Na,
Since it is synthesized or produced in a state containing an alkali metal such as alkali, it is preferable to perform a treatment to give it acidic properties in order to apply it to the stimulant of the present invention. For this method, it is possible to simply contact with salt, shun, salt, etc., or NT'
5 ions may be substituted with Na and K ions and fired to form a solid acid with +H='Q.

This solid acid is usually powdered and requires a dispersant and an adhesive to apply it to the paper. As the dispersant, sodium birophosphate, which is commonly used for printing paper, is preferably used.

Further, as the adhesive, I Shuntaku, CMC, PVA, rubber emulsion, etc. can be used. Among these, rubber latex has the effect of providing strong adhesion when applied to paper, and is a particularly preferred substance for obtaining a strong impression.

Next, the adhesion of the solid acid substance to paper and the ratio of adhesion with the dispersant and adhesive in the present invention will be explained.

First, regarding the amount of the dispersing agent and binder relative to the solid acidic inorganic substance, it is preferable that the amount of the dispersing agent and binder be in the range of 10 to 20 parts by weight per 100 parts by weight of the solid substance. . Among these, the dispersant is used to uniformly apply the solid acid substance, and only needs to be added in an amount of 1lL2~(L3 parts by weight), but it is preferable to add as much as possible to improve the adhesion of the binder. In particular, the rubber emulsion added as a binder has the effect of improving the adhesive strength to paper, so it is better to have as much as possible, but adding too much can cause a desorption effect, so it should not be used as a compound wax. is preferably in the range of 10 to 15 parts by weight.

In addition, the thickness of the coating; that is, the thickness of the coating, is preferably as thick as possible from the standpoint of deodorizing capacity, but if it is too thick, it may be processed into wrapping paper or wallpaper, and the adhesive part with the paper or the coating itself may be damaged. Since cracks occur and peeling occurs, the preferred film thickness is in the range of 10 to 30 μm. In addition, when applying to paper, it is possible to apply not only to one side but also to both sides.

The poultry removal paper obtained in this way can be cut into any size and used as it is as wrapping paper for removing source odors, or as indoor wallpaper, or it can be processed into various shapes, such as corrugated shapes. It can also be used as a spell filter.

[Example 1] 100 parts by weight of γ-type zeophyte with solid acid (HY), 4 parts by weight of sodium pyrophosphate (single and double layered part, $It), and 12 parts by weight of rubber latex were mixed, respectively. Then, water was added so that the 3 degrees was 35 wt% and stirred thoroughly, and the slurry was coated on an A4 size coating base paper to obtain a removal paper 1.This removal paper 11 in advance
After drying at 0°C and shredding with a shredder, 200 p.
The amount of adsorption of the degassing paper was determined from the 4 degree decrease in ammonia gas measured with the north type gas detection tube by f4 for 3 hours in a 500-pm airtight container containing ammonia gas of pm, and the following results were obtained.

Remover paper fly 1 adsorption capacity t 2 mot/m” (extractor paper area)
In addition, the film thickness determined from the drying test of this degai paper is 15 μm.
However, no peeling or cracking of the pattern itself was observed.

[Example 2] 1 part of HY zeolite 100@t was blended with sodium pyrophosphate, starch, and rubber emulsion as shown in Table $J1, and water was added to prepare a coating slurry with a slurry concentration of 53 to 35 wt%. did. This was coated on A4-sized base paper in the same manner as in Example 1 to obtain release papers 2 to 11. Each of these was dried at 110°C in advance, shredded with a shredder, placed in a 500-tight I+A container containing 200 nm of trimethylamine for 3 hours, and the residual gas concentration of trimethylamine was measured using a gas chromatograph. The suction results shown in Table 1 were obtained.

Deodorizing papers 2 to 4 show the evolution of the addition of the dispersant Bilorin 1 Soda, and although there is no significant difference in absorption R pupil, deodorizing paper 2 shows segregation in the heavy film. Deaerator papers 5 to 7 had different amounts of starch added, but deaerator 5 had a small thickness and adsorption amount, probably due to poor caking properties. In addition, deodorizing papers 8 to 11 have different amounts of rubber emulsion added as an adhesive. Of these, deodorizing paper 8, which has a smaller amount added, has a 3rd degree of adhesion to the paper, while 11 has adsorption of trimethylamine. This resulted in a decrease in the amount.

Table 1 [Example 3] Deodorized papers 12 to 14 were obtained by coating in the same manner as in Example 1 except that the type of solid acid was changed as shown in Table 2. As a comparative example, a dispersing agent and a binder were added to a commercially available agent (activated carbon) to form a fine slurry: I-t. A deodorizing paper for comparison was prepared. Example 2 for each of these
The adsorption capacity was measured in the same manner as above, and the results shown in Table 2 were obtained.

Table 1g2 [Effects of the Invention] The deodorizing paper of the present invention can effectively remove nitrogen-containing malodorous substances such as ammonia and amines.

Claims (1)

[Claims] A deodorizing paper comprising a paper coated with a slurry in which a solid acidic inorganic substance is suspended in an aqueous solution containing a dispersant and a binder.