JPS61136439A - Malodor absorbing material and its preparation - Google Patents

Abstract

PURPOSE:To improve absorbing capacity and humidity conditioning capacity, by preparing a malodor absorbing material by forming a specific amount of a cellulose fiber, magnesium silicate clay mineral having an amorphous part and an org. binder into an integral solid substance. CONSTITUTION:100pts.wt. of a cellulose fiber, 50-3,000pts.wt. of magnesium silicate clay mineral having an amorphous part and 1,000-300,000pts.wt. of water are mixed to prepare a slurry. An org. binder is added to this slurry in an amount of 1-20pts.wt. to 100pts.wt. of the magnesium silicate clay mineral having the amorphous part on a solid basis. This slurry mixture is dehydrated and molded to form a semi-filter body which is, in turn, dried to obtain an integrally solidified malodor absorbing material. The size of the magnesium silicate clay mineral having the amorphous part is pref. 150mum or less.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a material with excellent odor absorbing performance, and more specifically, to a material comprising cellulose fiber, a magnesium silicate clay mineral having an amorphous portion, and an organic binder. This article relates to an odor-absorbing material containing as a main component and a method for producing the same.

[Conventional technology and its problems]

In recent years, as the standard of living of the people has improved, more adequate measures have been required to deal with odors and odors that pose environmental health problems.

These problems include odors in closed spaces in ordinary homes,
For example, there are toilet odors, closet odors and humidity, garbage odors in the kitchen, body odors in places where large numbers of people gather such as meeting halls and common rooms, cigarette odors, and other odors, malodors, and unpleasant odors. 1. There are strong demands from society and industry,
The development of materials with excellent odor absorption performance has been delayed.

Conventionally, as a method to solve these problems.

/< A/ 7' A sheet-like material that adsorbs ammonia (Japanese Patent Application Laid-open No. 59-95
951), adsorbent-containing paper in which finely powdered activated carbon is mixed into pulp as adsorption lines (German Patent No. 655783), adsorbent-containing paper containing adsorption line powder made by finely dividing sepiolite (Japanese Patent Application Laid-Open No. 1983-1999). 6611) etc. have been proposed.

However, these conventional odor-absorbing materials are made by incorporating adsorbing deodorants such as activated carbon or sepiolite into fibrous pipes to impart and improve adsorption performance, but they do not produce odors that pose environmental hygiene problems.・Materials that remove bad odors, etc.
Its odor absorption performance was insufficient.

Therefore, the present inventors conducted intensive research to resolve these conventional problems, and as a result of repeated various systematic experiments, they came up with the present invention.

[Purpose of the invention]

An object of the present invention is to provide a material with excellent odor absorption performance and a method for producing the same.

[Structure of the invention]

The odor-absorbing material of the present invention comprises cellulose fibers, a magnesium silicate clay mineral having an amorphous part of 100 to 3,000 parts by weight based on 9,100 parts by weight of the cellulose fibers, and a magnesium silicate clay mineral having an amorphous portion of 100 to 3,000 parts by weight based on 100 parts by weight of the magnesium silicate clay mineral. and an organic binder in a solid content of 1 to 20 parts by weight (hereinafter referred to as the first invention).
.

Next, the method for producing the odor-absorbing material of the present invention includes a cellulose step, a second mixing step of mixing the slurry and an organic binder to form a mixed slurry, and dehydrating and molding the mixed slurry to form a semi-solid material. This invention is characterized by comprising a molding step to form a wet filter body, and a drying step to dry and solidify the semi-wet filter body to form an integral solidified product (hereinafter referred to as the second invention).

Below, the configuration of the present invention will be explained in more detail.

The cellulose fiber used in the first invention is as follows.

It is a cellulose fiber whose main component is cellulose, which is the main component of cell membranes in plants. For these things.

Natural cellulose fibers include cotton, Bonpax cotton (
Kiwada), kapok and other seed fibers, hemp, flax, jute,
Jinhide fibers such as tsumi, paper mulberry, and mitsumug, Manila hemp, etc.
Leaf fibers such as Niezyzund hemp, conifers (pine, fir, etc.)
spruce, hemlock, cedar).

There are wood fibers from hardwoods (beech, birch, poplar, maple), etc. In addition, regenerated cellulose fibers such as 0 artificial 7μ loin fibers, hiscose artificial silk thread, copper ammonia aluminum q'n fortin, nitrate human silk, etc.
Semi-synthetic fibers such as acetate and human silk.

Furthermore, this cellulose fiber is made from old newspapers and dust paper.

It may also be obtained from recycled resources such as old magazines.

The cellulose fibers preferably have a fiber length in the range of 11a to several tens of microns. This means that the fiber length is (L
If it is less than 1s+, then the length of the fiber. The magnesium silicate clay mineral having an amorphous portion is a hydrous magnesium silicate clay mineral that has been heat-treated (fired) within a predetermined temperature range.

Here, the hydrated magnesium silicate clay mineral (hereinafter referred to as the clay mineral) is a clay mineral that contains hydrated magnesium silicate as a main component and has a highly reactive hydroxyl group on its surface. In addition, the clay mineral.

υ made of fibers with a diameter of about 1005 to 16 μm; pores (channels/L/) with a rectangular cross section of about 10 to 6 λ or about 6 x 6 °A exist parallel to the fibers;
It itself has the property of absorbing and releasing moisture in the air and the property of absorbing odorous gaseous substances in the air. In some cases, a part of the magnesium in the clay mineral is replaced with aluminum, iron, sodium, nickel, etc.

Specifically, sepiolite (8epio, 1ite) whose main component is hydrated W4 magnesium silicate, Xyloti4e, roughinite (Loughl!ntel), and 7 falcondoite.

Varico/l/X kite (P4d7gOr8kit6
) etc. ・Use one or a mixture of two or more of these.

It is also commonly known as Mountain Cork.
ork), Mountain Wood (Mountain
WOOa).

Mountain leather (Mount4in 1eather)
), meerschaum, attapulgite, etc. fall under this category.

The magnesium silicate clay mineral having an amorphous portion used in the present invention is obtained by heat treating these clay minerals, and the heat treatment is preferably maintained at a temperature range of 350°C to 1100°C for at least about 5 minutes. The longer the retention time, the more stable the performance can be, resulting in a magnesium silicate clay mineral having an amorphous part. Here, the reason why the heating temperature was set within the temperature range of 550°C to 1100°C is when the temperature exceeds 1100°C and the ability to absorb and release moisture in the air. This is rounding in which no amorphous portion is formed.

Ru.

In this heat treatment, the clay mineral may be crushed to about 2 cIn or less, then heat treated to a predetermined temperature, and then crushed using a crusher, or the clay mineral may be crushed in advance to form the desired shape. It may also be obtained by heat-treating clay minerals to a predetermined temperature.

The magnesium silicate clay mineral having an amorphous portion of the present invention can be heated for about 1 to 4 hours at a heating temperature of 350°C and for about 5 minutes at 1100°C.

Although the structural changes caused by this heat treatment are not necessarily clear, magnesium silicate clay minerals with amorphous parts
When compared with the clay mineral before firing.

Although the shape itself is the same, the atomic spacing in the crystal structure is different. In addition, what is called attached water, structural water, bound water, or crystal water contained in the crystal structure has been metamorphosed into a smaller structure, and the apparent specific gravity has become smaller, and it is about 10A. The presence of channels that form pores makes it porous, and the presence of amorphous parts increases the specific surface area, making it a more activated material, which allows it to absorb moisture from the air better. It is thought to have the ability to absorb and release odorous substances and the ability to absorb odorous gaseous substances in the air.

This magnesium silicate clay mineral with an amorphous part is
It can be used in either powder form, single grain form, or plate form.
It is preferable that the pores of the magnesium silicate clay mineral having an amorphous portion remain, and the size of the pores is preferably within the range of 150 μm or less. Also, more preferably.

It is 10 μm or less. The pulverization at this time is carried out by wet pulverization or dry pulverization using a mixer, ball mill, vibration mill, pin mill, beater, etc.

In addition, the organic binder is an organic polymer latex, specifically, acrylonitrile butadiene latex (NBE), styrene butadiene latex (
8BR), acrylate latex (A8),
Vinyl acetate - silicone, folystyrene.

Examples include licorn resin.

5. This organic binder is made of fine particles of the above organic polymer (
(L5~5μm is preferable) is 40~60Ω in water.
At this stage, pigments,
Thickener 1 A dispersant, stabilizer, etc. may be mixed.

This organic binder not only strengthens the entanglement of cellulose fibers, but also strengthens the bond between the cellulose fibers and the clay mineral or between the clay minerals, thereby improving the water resistance of the odor-absorbing material of the first invention.

The odor-absorbing material of the first invention is composed mainly of the above-mentioned cellulose fiber, a magnesium silicate clay mineral having an amorphous part, and an organic binder, wherein: silicic acid having an amorphous part; The content of magnesium clay mineral is 10 parts by weight per 100 parts by weight of cellulose fiber.
It is 0 to 3000 parts by weight. This means that the content is 100
If the amount is less than 5000 parts by weight, it will be difficult to maintain the shape of the odor-absorbing material.

The content of the organic bond and agent is 1 to 20 parts by weight in terms of solid content based on 100 parts by weight of the magnesium silicate clay mineral having an amorphous part. This is applicable and also 2
If it exceeds 0 parts by weight.

Even if the content is higher than this, it is difficult to improve water resistance. This is because that.

Further, other additives can be added to the odor-absorbing material of the first invention to the extent that the excellent performance of the material is not impaired.

Specifically, polyvinyl alcohol-tv (P, V, Mu), CMC (carboxy V methyl cellulose), alumina sol, silica sol, etc. are used as dispersants to improve the dispersibility, and fibrous materials include glass fiber, ceramic fiber, etc. Inorganic fibers, or synthetic fibers such as nylon fibers and rayon fibers, and additives such as pigments and dyes. Also.

Water glass and cement as binding agents to improve strength.

There are plaster etc.

The method for producing the odor-absorbing material of this Wg2 invention is as follows. First, the cellulose fibers described in the first invention, a magnesium silicate clay mineral having an amorphous portion, and water are mixed to form a slurry (first mixing step).

The order in which these raw materials are mixed is not particularly limited. First, the cellulose fibers are beaten using a beating machine to prepare an aqueous slurry of cellulose fibers, and then they are dry-pulverized into a separately prepared appropriate size and shape. An aqueous suspension of a magnesium silicate clay mineral having an amorphous part obtained by wet grinding or a magnesium silicate clay mineral having an amorphous part obtained by wet grinding, and a mixing method of adding water as appropriate and dispersing and mixing. It is preferable that there be. If it depends on the mixing method.

This is because the time required for dispersion and mixing can be shortened.

Further, a method is provided in which a magnesium silicate clay mineral having an amorphous portion and cellulose fibers are dry-pulverized in advance to obtain an appropriate shape and size, and water is added thereto and mixed and dispersed to form a slurry.

A method is described in which a magnesium silicate clay mineral having amorphous S is mixed in water, wet-pulverized to an appropriate shape and size, and then cellulose fibers and appropriate water are added to mix and disperse.

Here, the mixing amount of the magnesium silicate clay mineral having an amorphous portion is preferably 100 to 3000 parts by weight per 100 parts by weight of cellulose fibers. Further, the amount of water mixed is preferably 1000 to 3000 parts by weight per 100 parts by weight of cellulose fibers. This is because by controlling the mixing amount within these ranges, the steps described below can be easily carried out, and the obtained odor-absorbing material can be made to have better odor-absorbing performance.

Further, this mixing is performed using a propeller mixer, a Hennel mixer, a bow mill, a vibration mill, a disper mill, or the like.

Next, the obtained slurry and an organic binder are mixed to form a mixed slurry (second mixing step).

Here, the mixing amount of the organic binder is preferably 1 to 20 parts by weight in terms of solid content based on 100 parts by weight of the magnesium silicate clay mineral having an amorphous portion. This is when the mixing amount is less than 1 part by weight.

This is because there is no such thing.

In addition, this mixing can be carried out by the same method as the mixing method in the first mixing step. In addition, in this mixing, it is desirable to mix to the extent that the binder is uniformly dispersed in the slurry.

In addition, in the first or second mixing step, for the purpose of improving F aqueous properties, a flocculant such as sulfate sulfuric acid, acrylic amide polymer, acrylamide-modified superposition product, etc. may be added and mixed as appropriate. Additionally, additives such as dyes and M materials may be added as appropriate.

Next, the obtained mixed slurry is dehydrated and molded into a desired shape using a paper making machine, a filter press machine, etc. to obtain a semi-moist filter (molding step).

The molding method includes a paper making method, a filter press method, a slip casting method, etc.

In addition, the water content of the semi-moist filter body obtained by the dehydration and molding
1 is preferably 50 to 80 ωt%. This is because: - If the water content exceeds 80 ωt %, - The molding during the molding process also shrinks. Also, 50 (lJ
This is because if it is less than j%, the bonding force will be weak, which is not preferable. In addition, it is highly preferable that the water content is 55 to 70 ωt%.

Next, the semi-moist filter body is heated and solidified to form an integral solidified product (drying step). In this drying step, the semi-moist filter body is dried by a normal temperature drying method, a vacuum drying method, a pressure drying method, a pressure/heat drying method, a vacuum heat drying method, a vacuum freeze drying method, or the like.

In this case, the above drying may be performed simultaneously with the molding in the molding step.

In the second invention, fillers may be added as appropriate for the purpose of improving strength, improving appearance, etc. as a 1m additive.

Examples of this additive include kaolin and silica sand. In addition, various additives such as antifungal agents, fragrances, additives, dyes, etc. may be added as appropriate.

[Operation and effects of the invention]

The odor-absorbing material of the present invention has excellent odor-absorbing performance.

In addition, it has a humidity control property that absorbs one moisture when condensation occurs such as in a high humidity environment, and releases the moisture contained inside in a low humidity environment. It is a material that has

Furthermore, the odor-absorbing material of the present invention has excellent water resistance and is also lighter than a material using a hydrated magnesium silicate clay mineral (such as sepiolite) that does not have an amorphous portion.

Furthermore, the method for producing the odor-absorbing material of the present invention9. A homogeneous odor-absorbing material can be produced easily and inexpensively.

In addition, the odor-absorbing material produced by the production method of the present invention is
It is a material that has excellent odor absorption performance, water resistance, and moisture control properties.

In this way, the mechanism by which the odor-absorbing material of the present invention and the odor-absorbing material produced by the method of the present invention exert such effects is still not clear. - Fibers with a diameter of about α005 to a6 μm - about 10 to 6 or 6 x 6 parallel to the fibers
In addition, there are pores with a rectangular cross section, and these pores and amorphous parts function as receiving sites for odorous gaseous substances, absorbing odorous gaseous substances in the air, and It is thought that it absorbs and releases moisture.

In addition, the other main component is 7μ loin fiber.

Since it has some odor absorbing and moisture absorbing and desorbing properties by itself, it is thought that both functions can be compensated and it can be made into an odor absorbing material that has excellent odor absorbing and moisture controlling properties.

As described above, the odor-absorbing material of the present invention has excellent odor-absorbing performance and water resistance, and also has moisture control properties, so it can be used as a ceiling material for buildings, a wall material 9, etc., for example, as a ceiling material in closed spaces such as toilets and closets. , also as wall material.

It is very useful as an odor- and moisture-absorbing sheet for lockers, chests of drawers, etc.

〔Example〕

The F1 invention will now be described in detail.

Example 1゜Bulb cellulose fiber t-beating in the amounts shown in Table 1!
IfI: Used and beaten with an appropriate amount of water to obtain an aqueous slurry of pulp cellulose fibers. Next, this slurry is put into a mixed seed, which has an amorphous part obtained by baking sepiolite powder having an average particle size of 1 μm in a crucible type nichrome furnace at a temperature of 800°C for 2 hours in an oxidizing atmosphere. Magnesium silicate clay mineral t-Add the amount shown in Table 1,
Furthermore, water was added so that the total amount was 5001, and the mixture was mixed until it was sufficiently dispersed to obtain a homogeneous slurry. Furthermore, styrene-butadiene latex (solid content 50ωt) was added to the slurry.
%) as shown in Table 1 and mixed until sufficiently dispersed to obtain a mixed slurry.The obtained mixed slurry was then filtered using a stainless steel wire mesh of 80 mesh as a filter material with inner dimensions 1. mX 1
The mixture was poured into a paper-making frame of m×α5 m, and the water was filtered by reducing the pressure with a water jet pump to obtain a plate-shaped semi-moist molded product.

In the end, this molded body was placed on a stainless steel plate.

The mixture was dried and solidified in an atmosphere of 1 m and normal pressure to obtain plate-shaped molded products that were integrally solidified (sample numbers 1 to 5).

Performance evaluation tests of the obtained molded article were carried out by two odor absorption tests, moisture absorption and release tests, and water resistance tests.

First, an odor absorption test was conducted. First, a part of the molded product,
Temperature: 24°C, relative humidity: 40% (ordinary H is Re1ativ)
2 under the environment of e k [abbreviation of umidity;
Leave it for a week, then leave it for 5 hours at a temperature of 110 degrees Celsius, relative humidity 40% RH, and then leave it at a temperature of 110 degrees Celsius, relative humidity 40% RH, and then leave it at a temperature of 8 degrees 24 degrees Celsius and relative humidity 40% Rf
It was returned to the environment of [1], and then a 50 yt piece was cut out to make a sample piece. This was placed in a 101 polyester/L/bag, and the air in the bag was evacuated 't-1 times. I then attached this to an odor absorption test device (Figure 1). While flowing nitrogen gas, 5μe of methyl sulfide [L] and 15μe of diethylamine (15μe) were injected using a microsyringe through the sample injection port 5, which was locally heated to 200°C by -416, and the dry flowmeter showed 51. The introduction of the odorous gaseous substance into the inner bag of the polyester bag was completed by flowing nitrogen gas until
1 PPm and diethylamine was determined to be 51 ppm.

did.

Next, the odorous gaseous substance inside the polyester bag was removed using a gas-tight syringe and using a gas chromatograph.
Measurements were carried out under the analysis conditions shown in Tables 3 and 3 to examine changes in gas concentration over time. The results are shown in Figures 2 and 3, respectively, where the initial concentration of the introduced odorous gaseous substance is 100%, and the rate of decrease in the concentration of methyl sulfide and diethylamine is shown.
Shown in the figure. The numbers next to the display symbols in the upper right corner of the figure indicate the sample numbers.

Table 2 Methyl sulfide analysis conditions e Column: β, β'-01) PN, 80-100 mesh, 5xaxφX4m glass Column temperature near 0°C Detector: Flame photometric detector (FPD
) ・Apparatus: Shima$GO-R9Aail Gascoma) Graph Table 5 ・Analysis conditions for diethylamine ・Column: 28% Penwglt 225 + 4% K
Oh.

80-100 mesh, 3wφX 3m glass Column Temperature: 80"C-180" Temperature rise in 0.5"07 minutes Detection a: Flame thermiomic detector (FTD) ・Device: 1tsu GO-7AG type Gas chromatography Next, a moisture absorption and desorption test was conducted.First, a part of the molded product was left at a temperature of 24'C and a relative humidity of 4 degrees for two weeks, and then the bulk specific gravity of the molded product was measured. The results are shown in Table 1. Next, 100 f was cut out from a part of the molded product and used as a sample piece.

Place it in a constant temperature and humidity chamber maintained at 24°C and keep the relative humidity at 40% calm. The weight at this time was taken as the reference value (shown in Table 1 in the moisture absorption/desorption test results column). Next.

The relative humidity was set to 95% H and maintained for 24 hours. The weight increase at this time was measured (same as above, shown in ■).

Next. The relative humidity was set to 40% Rf and maintained for 24 hours, and the weight increase at this time was measured (same as above, shown in ■). below. This operation was repeated t-2 times and the weight increase was measured for each time (shown in NV, ■, ■, respectively). Sho 1
The weight increase in the table is. Increase in weight of sample piece 11 (m
li/f/; specific moisture absorption/desorption rate) (the same applies hereinafter).

Next, a water resistance test was conducted. A part of the obtained molded product was left in an environment of 24°C and 40% relative humidity for two weeks. 2 from a part of the molded product.

Cut out f and put it in a beaker containing 100md of tap water. After being left at 24°C for 24 hours, the appearance and shape were visually inspected. As a result, the molded product according to the present invention is as follows.
No change was observed in the appearance or shape of any of them.

For comparison purposes. A magnesium silicate clay mineral having an amorphous portion and an organic binder are not mixed (sample number C1), or an excessive amount of an organic binder is mixed (sample number 02)t! Kaha.

Comparative samples were prepared using the same composition and method as described above. A performance evaluation test was also conducted in the same manner.

The results obtained. For the odor absorption test, see Figures 2 and 5.
The moisture absorption and desorption tests are also shown in Table 1. In FIGS. 2 and 3, song #C1 shows the results of sample number C1, and curve C2 shows the results of sample number C2.

As is clear from the above test results, the molded products (odor-absorbing materials) according to the present invention have a higher performance than the comparative materials.

It can be seen that it has excellent odor absorption performance, as well as humidity control and water resistance.

Example λ Pulp cellulose fiber i13009 was beaten with an appropriate amount of water using a beating machine to obtain an aqueous slurry of pulp cellulose fiber. Next, mix this slurry [add K, 100 ml in advance]
5 Q of a magnesium silicate clay mineral having an amorphous portion obtained by calcining sepiolite powder having a particle size of mesh size or less in an oxidizing atmosphere in an M pot type nichrome furnace for 1 hour at the temperature shown in Table 4, and then Add water and mix until well dispersed to obtain a homogeneous slurry IJ-t-. Furthermore,
To the slurry, 20 (l) of acrylonitrile butadiene latex (solid content 50ωt) and sulfuric acid band (50ωt) were added.
% aqueous solution) 150F and further water so that the total water amount was 3001, and mixed until sufficiently dispersed to obtain a mixed slurry.

Finally, the obtained mixed slurry was filter-pressed at a press pressure of 4 Kg/rd using a Buoy/L/Gupure machine using a propylene furnace plate and polyester cloth as the P material to form a semi-moist compact with a thickness of 10 ff. Obtained.

Government Next, sandwich this molded body between 24i stainless steel plates.

The molded products according to the present invention were obtained by heating to 110°C under normal pressure to dry and solidify (sample numbers 6 to 9).

A performance evaluation test of the obtained molded article was conducted in the same manner as in Example 1 by an odor absorption test and a moisture absorption/release test. The results obtained are shown in Figures 4 and 5 for the odor absorption test, and in Table 1 for the moisture absorption and release test. In the figure, the numbers in the upper right display symbol indicate the sample number.

For comparison, a 5.2 m thick plywood board (sample number C3) and a comparative molded product (sample number 04) made using the same composition and method as above, except that the firing temperature was 1200°C. ), and a performance evaluation test was conducted in the same manner.

The obtained results are shown in FIGS. 4 and 5 for the odor absorption test, and in Table 4 for the moisture absorption and release test.・Curve 1 C5 in Figures 5 and 4 is sample number C.
5, Result 1- and Curve C4 respectively show the results of sample number C4.

As is clear from the above results, the molded product according to the present invention is
It can be seen that it has superior odor absorbing performance and humidity control properties compared to the comparative sample.

Note that the odor-absorbing material of the present invention obtained in Examples 1 and 2 according to the present invention was produced in the same manner as in Examples 1 and 2 using a hydrous magnesium silicate clay mineral having no amorphous portion. Compared to the material, the bulk specific gravity is approximately C
It was about L2 high.

[Brief explanation of drawings]

The figure shows an example of the present invention. Figure 1 is a diagram schematically explaining the odor absorption test apparatus in Example 1. Figure 2 shows the reduction rate t of methyl sulfide concentration in the odor absorption test of Example 1. Figure S is a diagram showing the rate of decrease in the concentration of diethylated amine in the odor absorption test of Example 1. Figure 4 is a diagram showing the rate of decrease in the concentration of methyl sulfide in the odor absorption test of Example 2.
The figure is a diagram showing the rate of decrease in diethylamine concentration in the odor absorption test of Example 2. 1... Bunk cylinder 2... Pressure reducing valve 6... Flow rate adjustment valve 4... Dry flow meter 5... Sample injection port 6
...Heater 7...Polyester/L' bag 8...9
Specimen Cantilever Liver Applicant Toyota Central Research Institute Co., Ltd. (2 others) Sutra B Calyx M (min) Figure 2 Elbow il! 19+ time (廿) Figure 3 1 rice bowl! l I'li (minutes) discussion'' Tokito, 9 (minutes)

Claims (11)

[Claims] (1) cellulose fiber, a magnesium silicate clay mineral having an amorphous part of 50 to 3000 parts by weight based on 100 parts by weight of the cellulose fiber, and a solid content based on 100 parts by weight of the magnesium silicate clay mineral; 1 to 20
An odor-absorbing material characterized in that the main component is an organic binder in the weight part. (2) Magnesium silicate clay minerals having amorphous parts include hydrated magnesium silicate clay minerals such as sepiolite, scillotile, palygorskite, and roughinite.
The odor-absorbing material according to claim 1, which is a material that has been heat-treated in a temperature range of 1100°C to 1100°C. (3) The odor-absorbing material according to claim (1), wherein the magnesium silicate clay mineral having an amorphous portion has a size of 150 μm or less. (4) The odor absorbing material according to claim (1), wherein the organic binder is an organic polymer latex such as acrylonitrile butadiene latex, styrene butadiene latex, acrylate latex, or vinyl acetate emulsion. (5) A first mixing step of mixing cellulose fibers, a magnesium silicate clay mineral having an amorphous portion, and water to form a slurry, and a first mixing step of mixing the slurry and an organic binder to form a mixed slurry. It is characterized by consisting of two mixing steps, a forming step in which the mixed slurry is dehydrated and formed into a semi-moist filter, and a drying step in which the semi-moist filter is dried and solidified to form an integral solidified product. A method for producing odor-absorbing materials. (6) The amount of the magnesium silicate clay mineral having an amorphous portion is 50 to 3000 parts by weight based on 100 parts by weight of cellulose fibers. A method for producing odor-absorbing materials. (7) Magnesium silicate clay minerals having an amorphous part include 350% hydrated magnesium silicate clay minerals such as sepiolite, scillotile, palygorskite, and roughinite.
The method for producing an odor-absorbing material according to claim (5), wherein the material is heat-treated in a temperature range of 1100°C to 1100°C. (8) The method for producing an odor-absorbing material according to claim (5), wherein the magnesium silicate clay mineral having an amorphous portion has a size of 150 μm or less. (9) The method for producing an odor-absorbing material according to claim (5), wherein the amount of water mixed is 1,000 to 500,000 parts by weight per 100 parts by weight of cellulose fibers. (10) The amount of organic binder mixed is 1 to 2 parts by solid content per 100 parts by weight of hydrated magnesium silicate clay mineral.
Claim No. 5 characterized in that the amount is 0 parts by weight.
) The method for producing the odor-absorbing material described in item 2. (11) The odor absorbing material according to claim (5), wherein the organic binder is an organic polymer latex such as acrylonitrile butadiene latex, styrene butadiene latex, acrylate latex, or vinyl acetate emulsion. Production method.