JPH10314286A - Basic offensive odor gas adsorbent containing sheet material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more easily remove basic offensive odor gas such as ammonia with high deodorizing efficiency by using a sheet material by packing a dry material of coffee grounds and/or a dry material of tea grounds. SOLUTION: Dry coffee grounds being a basic offensive odor gas absorbent are a material by drying a residue after making coffee by percolating a thing powdered by roasting coffee beans by boiling water. Dry tea grounds are a material by drying used tea leaves of green tea, oolong tea, black tea or the like. A highly water absorptive resin is added to these dry coffee grounds and dry tea grounds, and it is used. The highly water absorptive resin (a water absorptive high polymer) is a high polymer capable of absorbing water of several hundred times to thousand times dead weight, and becomes hydrogel by swelling by water. An alkali hydrolytic material of a starch-acrylonitrile graft copolymer and a sodium acrylate-bifunctional monomer copolymer are representative as the highly water absorptive resin to be used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material containing a basic malodor gas adsorbent and a method for adsorbing and removing a basic malodor gas using the same. More specifically, the present invention relates to dried coffee grounds and / or dried as a basic malodor gas adsorbent. A sheet material containing a basic malodor gas adsorbent using a tea residue, a sheet material containing such a basic malodor gas adsorbent and also containing a superabsorbent resin, and a basic malodor gas using these materials It relates to an adsorption removal method.

[0002]

2. Description of the Related Art For hospitalized patients, hospitals and sickbeds are places for treatment and living, and making the environment comfortable is also important for recovery from illness (Hinohara Shigeaki, "Basic Technology"). Nursing Manual II, 246 pages (19
90-year learning and research company)).

[0003] In this regard, the present inventor has already found that moist coffee grounds is useful for removing urinary odor (mainly ammonia odor) in a filth chamber that causes odor in a ward in previous studies. We have proven that there is, and have used this in old-fashioned stockings in our daily nursing activities (Yumiko Mitsada, et al. "Usefulness of wet coffee beans for ammonia odor in urinals"("27th Proceedings of the Japanese Society of Nursing Science (Nursing Comprehensive), 83-86 (1996)).
In detail, as a result of examining the effect of various deodorants on the ammonia odor generated by urine storage, wet coffee grounds is the most excellent in ammonia deodorization effect compared to activated carbon and pet sand, and it is available. Based on the fact that the method is easy and inexpensive, it has been considered highly practical and has been practiced as follows for the ammonia odor in the ward waste room. That is, (1) use stockings to easily attach wet coffee cake to the lid of the urine collection bottle, (2) pack 5 kg of coffee cake into stockings with a detergent spoon as a guide (approximately 25 g) in advance. Put it in a can with a lid and store it in the refrigerator,
(3) Change coffee grounds once every three days. As a result, the hospital staff was evaluated to have reduced odors.

[0004] However, the above-mentioned methods have disadvantages such as coffee decay during the rainy season, urine in the urine collected adhering to the coffee refuse and becoming dirty and hindering accurate measurement of urine volume. There is.

[0005]

SUMMARY OF THE INVENTION Under the background of the prior art described in the preceding paragraph, an object of the present invention is to make use of the effect of coffee grounds and tea grounds to absorb basic odorous gas such as ammonia.
It is an object of the present invention to provide a method for deodorizing a basic malodorous gas, which is simpler and has a high deodorizing effect.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the object described in the preceding paragraph, and as a result, have found that dried coffee grounds and / or dried tea residue (or additionally a superabsorbent resin). It has been found that the above object can be easily achieved by using (in a special mode) a product packed in a sheet shape, and the present invention has been completed based on such findings.

That is, the present invention provides a sheet material containing a basic malodor gas adsorbent, wherein the gas adsorbent is dried coffee grounds and / or dry tea residue, and a sheet containing such a basic malodor gas adsorbent. A material characterized by also including a super absorbent polymer, and a method of using such a sheet material by adding moisture to dry coffee grounds or / and tea scum provided therein. And a method for adsorbing and removing basic odorous gas.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

As is well known, malodorous gas is divided into acid gas such as hydrogen sulfide and methyl mercaptan and basic gas such as ammonia and trimethylamine. The object of the present invention is basic malodorous gas. is there.

[0010] The dry coffee grounds, which is a basic odor gas adsorbent according to the present invention, is obtained by roasting coffee beans (seeds of fruit of a coffee tree) into powder (so-called regular coffee) by leaching with hot water and liking. It is a product obtained by drying a residue (coffee cake) made from so-called coffee as a beverage. In addition, the dried tea residue is obtained by drying the shell of green tea, oolong tea, black tea and other tea leaves. See Test Examples 1 and 2 below for the fact that dried coffee grounds and dried tea residue have a remarkable basic odor gas adsorption ability.

[0011] Today, the amount of coffee grounds generated in Japan is enormous. This involves roasting and grinding imported coffee beans, processing the leachate leached with boiling water into a so-called coffee drink product as a liquid, or subjecting the leachate to spray drying or freeze drying to produce instant coffee. It depends on the prosperity. In addition, the generated coffee grounds are used as agricultural fertilizer raw materials, soil conditioners, industrial fuels, and are merely disposed of as sludge-treated industrial waste. The present invention according to the present invention has a great industrial significance. Also, the amount of generated tea residue is large. This is due to the widespread use of canned tea (instant liquid beverages), and the tea residue generated during the production of such canned tea is currently being disposed of as industrial waste except for being used as fertilizer. This is the same as the case of coffee grounds, and in this sense, the industrial significance of the present invention which leads to effective utilization of tea grounds as a resource is also great.

[0012] The coffee grounds and the tea residue are moist as they are generated, but there is no particular limitation on the drying method itself for drying them into a dry coffee grounds or a dry tea residue.
An appropriate drying method such as hot air drying and solar drying can be used as appropriate. The degree of drying is about 15% or less of water content,
It is preferably about 12% or less, for example, about 8%, from the viewpoint of decay prevention and economical viewpoint.

[0013] The sheet material containing the dried coffee grounds and / or the dried tea scum can also suitably conform to a known material in terms of the structure of the sheet material itself and the method of making the same. That is, in Japanese Utility Model Publication No. 2-35377 (Niei Kogyo Co., Ltd.), a cross-section is formed in a substantially waveform, and a plurality of grooves are formed substantially in parallel.
A first sheet material in which each groove is crushed at appropriate intervals in a direction substantially orthogonal to the groove to form a partition, and the partition defines a hollow portion in each groove to an appropriate length; A gas adsorbent loaded in the hollow portion of the groove, and a second sheet material adhered to the first sheet material so as to close the hollow portion of the groove loaded with the gas adsorbent; A sheet material containing a gas adsorbent characterized in that both or one of the sheet material and the second sheet material is formed of a gas-permeable sheet material and a method for producing the same are disclosed. The sheet material containing a basic malodorous gas adsorbent of the present invention can be prepared by employing dried coffee grounds and / or dried tea residue as the gas adsorbent in the sheet material containing the basic odor gas adsorbent. Japanese Patent Application Laid-Open No. 6-40833 (Yamamuro Co., Ltd.) and the like also disclose a sheet material from which a sheet material containing a basic malodorous gas adsorbent of the present invention can be prepared. The sheet material containing a basic malodorous gas adsorbent of the present invention,
In addition, spread an appropriate amount of dried coffee grounds and / or dried tea residue on a piece of (cotton) cloth of appropriate size placed horizontally, and spread it thinly so as to have a uniform thickness. It can also be created by a simple method such as overlapping and sewing (see FIG. 1 to be described later). When a heat-welding film or nonwoven fabric provided with a vent hole through which an odorous gas such as ammonia gas can enter and exit is used instead of a cloth, heat welding can be performed instead of sewing.

When the dried tea residue is used in combination with the dried coffee grounds, the dried tea grounds can be pulverized so as to be mixed well with the dried coffee grounds in order to improve the mixing of both. In the sheet material containing a gas adsorbent disclosed in Japanese Utility Model Publication No. 2-35377, the width of each groove is formed to be narrow or / and crushed at appropriate intervals in a direction substantially orthogonal to the groove to form a section. If you take a small interval when
These can be ground to a suitable size so that the (heat) sealing can be carried out successfully or the compartmentalized cavity can be loaded with a sufficient amount of dried coffee grounds or dried tea grounds.

In any case, the sheet material containing a basic malodor gas adsorbent of the present invention does not have any special features in the structure itself and the preparation method itself of the sheet material. The use of coffee grounds and / or dried tea scum or the drying of coffee grounds and / or
And that a super absorbent resin was used in addition to the dried tea residue,
And it is characterized by its special use, if desired.

As is well known, tea leaves in cans are
Although it contains catechins having an antibacterial action such as (−)-epigallocatechin gallate, it has been confirmed by the present inventors that epigallocatechin gallate has an amount of about 90% of the amount originally contained in the dry tea skewer in the raw tea leaves. Half amount remains. Therefore, when dry tea cake is mixed and used with dry coffee grounds, there is an advantage that the former is less likely to rot due to the antibacterial action of the latter.

As is well known, a superabsorbent polymer (a water-absorbing polymer) is a polymer capable of absorbing water several hundred to 1,000 times its own weight. It swells with water to form a hydrogel. It has a slightly cross-linked structure of the electrolyte, and is typically an alkali hydrolyzate of a starch-acrylonitrile graft copolymer or a sodium acrylate-bifunctional monomer copolymer. It has the characteristic of being able to hold even if it is used, and has applications such as disposable diapers, sanitary products, water retention agents for agricultural and horticultural use, and waterproofing agents for civil engineering and construction. " Chemical Doujin (issued in 1994).

As a commercially available product of such a superabsorbent resin, for example, there is a "Sun Fresh" series of Sanyo Chemical Industries, Ltd. In the "Sun Fresh" series, the graft starch type includes ST-100 and the acrylic type includes "ST-500D". All are white powders (central particle size is several hundred μm
) To fine powder (the center particle size is on the order of several tens of μm). Such a superabsorbent resin of white (fine) powder can be well mixed with coffee grounds and / or dried tea residue by using, for example, a V-type mixer.

The sheet material containing a basic malodor gas adsorbent containing the above-described dried coffee grounds and / or dried tea residue of the present invention as an active ingredient of the present invention, as described later, is popular on the covering part of a pressure sore. However, the basic odor gas adsorbent sheet material containing a highly water-absorbing resin in addition to such an active ingredient not only absorbs and removes the offensive odor, but also has a water absorbing property. When wrapped and placed on the affected area, there is an advantage that not only odor removal but also pus is absorbed.

There are no particular restrictions on the amount of superabsorbent resin used, and any amount may be used as long as the addition effect is exhibited when mixed and added to dry coffee grounds and / or dry tea grounds. It can be around 1% by weight based on the dry tea residue.

The special mode of use is that the sheet material containing a basic malodorous gas adsorbent of the present invention gives moisture to the dried coffee grounds and / or the dried tea residue provided at the time of use. By doing so, the adsorption activity of the basic malodorous gas is improved.

The degree of water supply is, in short, the amount of water at which the adsorption activity is improved as compared to the adsorption operation of a basic malodorous gas under exactly the same conditions except that no water is supplied.
For example, it can be 2-3 g of water, for example, about 2.5 g per 6 g of dried coffee grounds. Further, a specific method of adding water can be performed, for example, by dispensing the above-mentioned water amount into each section of the sheet material using a syringe or the like. When added in such a manner, the effect of the superabsorbent resin on water absorption performance can be ignored.

The sheet material containing the dried coffee grounds and / or the dried tea residue (or, in addition, the superabsorbent resin) according to the present invention can be used as it is, regardless of the special mode of use described above. It can also be used as a sheet material for basic odor gas adsorption. In this case, the ammonia gas adsorption performance of the dried coffee grounds is not much different from that of wet coffee grounds, but there is no storage problem such as that found in wet coffee grounds (need to be stored in a refrigerator to prevent spoilage). .

[0024]

The present invention will be further described below with reference to test examples and examples.

Inspection Example 1 (Basic Odor Gas Adsorption Ability of Dried Coffee Grains): (1) Target gas; basic gas: ammonia gas and trimethylamine acid gas: hydrogen sulfide (2) adsorbent; dried coffee grounds (the present invention) , 8% moisture) Commercial coconut shell activated carbon (control) (3) Adsorption test method;
It is made of 1.4 L glass and has a stirring device at the bottom. Separately, a high-concentration ammonia gas is prepared in a glass container having an internal volume of about 3 L, and a certain amount of the ammonia gas is withdrawn from the glass container with a syringe and injected into the adsorption test container. As a result of the preliminary test, when 3 mL of high-concentration gas was injected, the ammonia gas concentration in the adsorption test container became 100 ppm.
The gas concentration was measured using a gas detection tube manufactured by Gastech Co., Ltd.

In the adsorption test, first, the inside of the adsorption test container was cleaned, 3 g of the adsorbent sample was put in the container, and the high-concentration gas 3 m was adjusted so that the initial concentration of ammonia gas became 100 ppm.
L was injected. The internal gas concentration was measured at predetermined time intervals while stirring.

The same method was used for trimethylamine and hydrogen sulfide. However, the initial concentration was 30
ppm.

(D) Results: The results are as shown in Table 1 below and FIG.

◎

[Table 1]

As can be seen from Table 1, the dried coffee grounds adsorbs the basic odor gas of ammonia and trimethylamine, but does not adsorb the acidic odor gas of hydrogen sulfide. On the other hand, commercially available coconut shell activated carbon has an ability to adsorb gas regardless of acidity or basicity, but the degree differs depending on the gas. In particular, regarding the adsorption capacity of ammonia gas,
It can be seen that the dried coffee grounds of the present invention has much better adsorption ability than activated carbon.

Inspection Example 2 (Basic Odor Gas Adsorption Ability of Dried Tea Slag): (1) Target Gas; Basic Gas: Ammonia Gas and Trimethylamine Acid Gas: Trimethylmercaptan and Hydrogen Sulfide (2) Adsorbent; Dried Green Tea Slag (Invention, 8% moisture) Commercial coconut shell activated carbon (control) (3) Adsorption test method: Put the test gas in a 13 L glass desiccator, measure the initial concentration with a detector tube, and then put in 3 g of adsorbent sample After 15 minutes, 30 minutes and 60 minutes, the gas concentration is measured with a detector tube.

(4) Results: The results are shown in Table 2 below.

◎

[Table 2]

From the results shown in Table 2, after 60 minutes, the dried green tea residue contained 28% of ammonia, trimethylamine, methyl mercaptan and hydrogen sulfide, respectively.
Deodorization rates of 25%, 0% and 0% (100 times the difference between the initial value of the gas concentration and the value after 60 minutes divided by the initial value) were shown. 25%, 75%, 100% and 100% for each of the gases
%, Which indicates that the dried tea residue has the ability to adsorb basic malodorous gas.

Inspection Example 3 (Deodorizing effect of dried coffee grounds after 24 hours): A sheet containing a basic malodor gas adsorbent (dry coffee grounds with 8% moisture) of 10 cm in length and width (based on the above-mentioned Japanese Utility Model Publication No. 2-35377). As shown in FIG. 3, a gas absorbent is loaded into the hollow portion of the first sheet material of the air-permeable water-repellent nonwoven fabric, and the second sheet material of the air-permeable water-absorbent nonwoven fabric is heat-sealed thereto. It was cut into a size of 10 cm × 10 cm before use and the cut pieces contained about 6 g of dried coffee grounds in total.
2 ml of water was dispensed with a syringe into each section of the cut piece (the dry coffee grounds was loaded with a total amount of about 6 g) (the invention product 2).
And about 20 g of wet coffee grounds (drip-dried coffee grounds in a hospital coffee shop) which has been semi-dried to 8 g (contains approximately the same amount of coffee grounds as product 1 of the present invention in terms of dry product, and the present invention 5cm)
Three kinds of test materials (comparative products) packed in cut stockings were prepared and subjected to the following test.

One of the test materials is attached (placed) to the back of the lid of a 3000 ml urine storage bottle having a diameter of 14 cm, and 2%
The ammonia concentration (hereinafter sometimes abbreviated as ammonia concentration) in the gas phase portion in the bottle 24 hours after injecting 500 ml of ammonia water is measured. In addition, the measurement of the ammonia concentration is carried out using a measuring pipe type measuring instrument (Jisk 0804 detection pipe type gas measuring instrument) and an odor measuring pipe (for ammonia). Also, change the ammonia water in the urine bottle every day.

Such an inspection is carried out for each test material 2 times a day.
This is created for 5 days (1 Oct. 15
(5 days up to 9 days) (ie, a total of 10 times for each test material). As a control, exactly the same operation was performed except that no test material was attached. The results are shown in Table 3 below and FIG.

◎

[Table 3]

As shown in Table 3 and FIG. 4, the ammonia concentration in the gas phase after 24 hours of 2% aqueous ammonia (control) without any treatment was 18 ppm at the maximum and 13.4 ppm on average. On the other hand, sheet material of wet coffee grounds (comparative product) and dried coffee grounds (product 1 of the present invention)
The setting group had a maximum of 6 ppm, and an average of 5.2 ppm, which was less than 1/2 of the control. However, in the group provided with the dried coffee grounds sheet (the product 2 of the present invention) in which water was added to the dried coffee grounds, the results were 4 ppm at the maximum, and 3.1 ppm on average, which was a remarkably low value.

Inspection Example 4 (Durability of Deodorizing Effect of Inventive Product 2): Test Material 2 of Inventive Product 2 Same as in Inspection Example 3
Points (designated A and B) were subjected to the same test as in Test Example 3. However, the 2% aqueous ammonia injected into the urinal was replaced every day. The results are shown in Table 4 below and FIG.
Shown in

◎

[Table 4]

As shown in Table 4 and FIG. 5, with respect to the duration of the deodorizing effect of the product 2 of the present invention, the ammonia concentration on the 1st to 4th days is 1 to 2 ppm, but on the 4th and subsequent days, After a plateau of 2 ppm was reached, it rose sharply from day 7 onward.

From this, it can be seen that, in the case of a urine storage bottle, the sheet material containing the basic malodor gas adsorbent of the present invention does not suffer from the ammonia odor after being replaced about once a week.

Inspection Example 5 (Practicality of Portable Toilet of Product 2 of the Invention): Five inpatients using a 13 L portable toilet were randomly selected (A to E), and each person's portable toilet was used. The same product 2 of the present invention as in Inspection Example 3 was attached to the back of the lid, and the effect on the concentration of ammonia in the gas phase inside the portable toilet was measured after urination and before the portable toilet was replaced. In addition, five portable toilets to which the product 2 of the present invention was not attached (corresponding to five patients) were used as controls. For each person, the product 2 of the present invention is attached.
4 times and 2 times with the control. The results are shown in Table 5 below and FIG.

◎

[Table 5]

As shown in Table 5 and FIG. 6, the ammonia concentration (control) in the portable toilet not using the sheet material of the product 2 of the present invention was 3 ppm at the maximum and 1.7 ppm on average. On the other hand, the ammonia concentration in the portable toilet provided with the sheet material of the product 2 of the present invention is an extremely low value of 0.8 ppm at the maximum and 0.44 ppm on the average, which is an excellent result. The adsorption method was found to be sufficiently practical.

Example 1 (Utilization of the method for adsorbing and removing the odor of ammonia gas according to the present invention): A long sheet material of the present invention 1 was cut into small pieces of 10 cm × 10 cm during use.
Attach a note so that 2 ml of water per piece is dispensed with a syringe into the dry coffee grounds of each section of the piece and used.
They were distributed to each ward and used for various odor countermeasures, and their effects were evaluated in a six-step system.

As a method of using the sheet material in each ward, in addition to measures against urinary deodorization, oil paper was used instead of oily paper for patients with pus-like gauze contamination such as pressure sores. Regarding the deodorizing effect, the results of the interview were 4.3 points on average out of 5 points.
And high evaluation was obtained. In addition, a patient who used oil paper instead received an evaluation that the odor was no longer a concern.

Up to now, not only the staff but also patients have heard that urine smells occur in hospital rooms that use portable toilets, even if ventilation is performed, and that the smell spreads when replacing the portable toilets. However, after attaching the sheet material containing the basic malodorous gas adsorbent of the present invention to the back of the lid, it was evaluated that the odor was lessened when replacing the portable toilet as well as indoors.

[0050]

Elimination of offensive odor is an important part of nursing, but environmental adjustment tends to be a passive behavior in nursing work. It is said that patients actively complain about physical distress caused by the disease, but often endure the discomfort that comes from the environment (Shiaki Hinohara " Beginning with Observation-Aid for Daily Life ", pp. 132-338 (1990 Gakken).

The usefulness of the drip-dried coffee grounds packed in stockings (comparative product) has already been reported in the aforementioned Nursing Comprehension, pp. 83-86 (1996), but this alone is not enough for portable toilets. Attachment to the lid or around the patient was difficult, and its use was limited.

According to the present invention, a sheet material of dried coffee grounds and / or dried tea residue, which is simpler and has a higher ammonia deodorizing effect, and an effective method of using the same can be provided. Since this sheet material is water-repellent and thin and compact, it can be used in various places. Further, for example, by adding water to the dried coffee grounds or / and dried tea grounds using a syringe, a more deodorizing effect can be obtained. In addition, it is hygienic and simple because it only needs to be changed once a week. Therefore, the possibility of application of other uses is wide, and in fact, it was well-received when placed on the covering of the pressure sore. However, it is very unfortunate that the degree of the effect cannot be expressed numerically like the ammonia smell.

Activated carbon products have conventionally been used for the malodor of wounds. Activated carbon is a highly hydrophobic adsorbent and is therefore suitable for adsorption from aqueous solutions (Seiichi Kondo et al., "Science of Adsorption", pp. 191-192 (1991, Maruzen Co., Ltd.)). However, if a certain amount of human insensitive excretion is adsorbed, it cannot be adsorbed any more, so frequent replacement is necessary. However, the sheet material with activated carbon is 10 × 10
Frequent replacement was difficult to implement because of the high cost, even in the size of cm. On the other hand, the sheet material of the dried coffee grounds is about one-fifth of the sheet material, and the effect can be expected to last for about one week, so that a high effect can be realized at low cost.

Various odors are generated in the hospital room. Among them, the odor after excretion is one of the mental distresses, especially for patients who are forced to excrete on the floor or at the bedside. One method of alleviating the pain is the method of the present invention.

In today's aging society and medical treatment at home as well as in hospitals, the sheet material in which the dried coffee grounds or / and dried tea residue of the present invention are packed in a sheet form can be used at home in the future. We think that it can be applied and developed in daily nursing activities by repeatedly examining specific usage methods as one of the deodorizing means. In addition, regardless of medical treatment, the dried coffee grounds or / and dried tea grounds of the present invention are packed in a sheet form for the deodorization of ammonia odor in toilets and the like. Can be used by placing it in a place where ammonia odor is generated, such as a toilet.

[Brief description of the drawings]

FIG. 1 is a conceptual top view of an example of a sheet material in which a basic malodorous gas adsorbent is packed in a sheet shape.

FIG. 2 shows the results of Test Example 1.

FIG. 3 is a top plan view of a real example of a sheet material in which dried coffee grounds are packed into a sheet (inspection example 3).

FIG. 4 shows the results of Test Example 3.

FIG. 5 shows the results of Test Example 4.

FIG. 6 shows the results of Test Example 5.

Claims (3)

[Claims] 1. A sheet material containing a basic malodorous gas adsorbent, wherein the gas adsorbent is dried coffee grounds and / or dried tea residue. 2. The sheet material containing a basic malodorous gas absorbent according to claim 1, wherein a superabsorbent resin is added in addition to the dried coffee grounds and / or the dried tea residue. 3. A basic material characterized in that the sheet material containing a basic malodorous gas adsorbent according to claim 1 or 2 is used by adding moisture to dry coffee grounds and / or dry tea cake provided therein. Odor gas adsorption removal method.