JP2000064175A - Fiber absorbing acid or aldehyde, and its structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fiber absorbing an acid and an aldehyde, capable of absorbing the acid and the aldehyde gas in good efficiency, and having good spinnability and processability to a nonwoven fabric by modifying a nitrile group of an acrylic fiber with a specific amination agent, and further to obtain a structure thereof. SOLUTION: This fiber absorbing an acid and an aldehyde is obtained by subjecting an acrylic fiber having pores with 10-100 nm pore diameters and successively opened on the surface of the fiber, and 20-100 wt.% water absorptivity to a heat treatment at a temperature 5-30 deg.C higher than the amination temperature described later, e.g. 100-130 deg.C, and subjecting the heat-treated fiber to an amination treatment with at least one kind of amination agent selected from a group of polyethylene polyamine, e.g. the polyethyleneimine with 200-1,000 molecular weight at 70-120 deg.C, to modify 10-50 mol.% nitrile group in the fiber and so that the weight increasing rate may be 10-100 wt.%. The acid and aldehyde-absorbing fiber structure is produced by allowing the structure to include >=5 wt.% fiber absorbing an acid and an aldehyde.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an acid and / or aldehyde adsorbent fiber and its structure, which efficiently adsorbs an acid and / or an aldehyde, and has a fiber strength and water absorption sufficient for passing through a spinning process and a nonwoven fabric processing step. It is about things.

[0002]

2. Description of the Related Art In recent years, interest in comfort in the living environment has been increasing due to changes in lifestyle, higher density of living environment, and increased confidentiality. Among them, formaldehyde, which is considered to be one of the causes of sick house syndrome,
The deodorization of cigarette odors at home or in automobiles has been improved, and removal of acids and / or aldehydes, which are the main components thereof, has become an important issue.

[0003] As deodorant fibers, those in which a deodorant substance is adhered and fixed on the fiber surface and activated carbon fibers are known, but the former have problems in durability and texture of deodorant performance, The latter has problems in price and deodorizing performance against aldehydes. In addition, basic ion exchange resins having amino groups are also known as adsorbents for acetic acid and acetaldehyde,
It is not fibrous and its use is limited.

[0004]

The object of the present invention is to adsorb a large amount of acid and / or aldehyde gas (saturated adsorption amount) and at a high adsorption rate, and it is easy to handle and easily processed into various forms. An object of the present invention is to provide an acid and / or aldehyde adsorbing fiber having the obtained mechanical properties and water absorption property and capable of easily regenerating the adsorption performance, and a structure thereof.

[0005]

As a result of intensive studies to achieve the above object, the present invention has been completed. That is, in the present invention, in the acid and / or aldehyde adsorbent fiber obtained by aminating the nitrile group of acrylic fiber with an aminating agent, the raw material fiber is subjected to a heat treatment at a temperature 5 to 30 ° C. higher than the amination temperature. Acrylic fiber, wherein the amination treatment modifies 10 to 50 mol% of nitrile groups in the fiber, and the weight increase rate by the treatment is 10 to 100% by weight. Suitably achieved.

Further, good results are obtained with an acid and / or aldehyde adsorbent fiber in which the aminating agent is one or more selected from polyethylene polyamines or the aminating agent is polyethyleneimine having a molecular weight of 200 to 10,000. . Furthermore, acrylic fiber is 10-100nm
Porous fiber having pores having a pore diameter of 1 and connected to each other, and further having pores on the surface of the fiber, and having a water absorption rate of 20 to 1
Good results are obtained with acid and / or aldehyde adsorbent fibers which are 00% by weight. The present invention also includes a fiber structure containing 5% by weight or more of the acid and / or aldehyde adsorbing fiber.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below. First, the present invention is an acid- and / or aldehyde-adsorptive fiber obtained by aminating the nitrile group of the raw material acrylic fiber with an aminating agent. The raw material fiber is 5 to 30 ° C. higher than the amination temperature. Acrylic fiber that has been heat treated is used. That is, the heat treatment temperature is set in consideration of the amination treatment temperature used in the production of the acid and / or aldehyde adsorbent fiber from the stage of producing the raw material fiber. The amination temperature is generally 70 to 70, as will be described later.
Since it is 120 ° C, the heat treatment temperature in the production of the raw material acrylic fiber is approximately 100 to 130 ° C.

When the heat treatment temperature for producing the raw material acrylic fiber remains at a temperature higher than the amination treatment temperature by less than 5 ° C., the orientation of the fibers is high and the amination treatment is difficult to occur. The acid and / or aldehyde adsorbability of the fiber is not sufficiently expressed. On the other hand, when the heat treatment temperature is higher than 30 ° C., a carboxylic acid is generated by hydrolysis of the nitrile group in the raw material acrylic fiber, which is a side reaction, and a combine with an amino group occurs to generate an acid. And / or not only the adsorptivity of aldehyde is hindered, but also the strength of the obtained fiber is lowered and the fiber does not endure processing. No particular limitation is imposed on the method of heat-treating the raw material acrylic fiber, and the heat treatment is carried out under wet or dry heat in a stretched state, a fixed length, or a relaxed state. These conditions may be appropriately determined in consideration of the properties of the raw material acrylic fiber that has been heat-treated, the ease of performing the next amination treatment, and the like.

There is no particular limitation on the conditions of the steps before the heat treatment step in the production of the raw material acrylic fiber, and the acrylic polymer is spun, washed with water and drawn by a wet or dry or dry-wet spinning method according to a conventional method. To manufacture.

As the acrylic fiber in the present invention, 40% by weight or more of acrylonitrile (hereinafter referred to as AN),
Preferably, it is a fiber formed of an AN polymer containing 50% by weight or more, and may be in any form such as short fiber, tow, yarn, knitted woven fabric, non-woven fabric, etc., intermediate product in production process, waste fiber, etc. But it doesn't matter. The AN polymer is AN
It may be either a homopolymer or a copolymer of AN and another monomer. Examples of other monomers include vinyl halides and vinylidene halides; (meth) acrylic acid esters (where the notation of (meth) is Methallyl sulfonic acid, p
-Sulfonic acid-containing monomers such as styrenesulfonic acid and salts thereof; carboxylic acid group-containing monomers such as (meth) acrylic acid and itaconic acid and salts thereof; other monomers such as acrylamide, styrene and vinyl acetate.

Further, as the raw material acrylic fiber of the adsorptive fiber of the present invention, pores having a pore diameter of 10 to 100 nm are connected, and the pores are formed on the surface of the fiber, and the water absorption thereof is 20 to 100% by weight. % Of the porous fibers increases the surface area of the fibers due to the effect of the surface open pores, the amination process not only proceeds uniformly, but also the water absorption is imparted to the amination-treated fibers and the acid And / or it is excellent in that the aldehyde adsorption property is also increased. Among the above-mentioned spinning methods, such a porous fiber adopts a wet or dry-wet spinning method, and the conditions such as a decrease in concentration of spinning solution, an increase in coagulation bath temperature, a decrease in coagulation bath concentration or an increase in washing temperature are taken. By taking it, it can be suitably manufactured. When the pore size of the pores is less than 10 nm, the basic properties such as water absorption, acid and / or aldehyde adsorption performance are not sufficient. When the pore diameter exceeds 100 nm, sufficient fiber physical properties such as strength of the acrylic fiber itself and the amination-treated fiber cannot be obtained. Further, when the pores are not opened on the surface of the fiber, the surface area of the fiber is not increased, so that the water absorption and the acid and / or aldehyde adsorption cannot be expected to increase.
Such a raw material acrylic fiber is disclosed in, for example, JP-A-7-15047.
It can be produced by the method described in JP-A-1.

The water absorption referred to herein is measured by the following method. Approximately 10 g of fibers disintegrated by hand card 800
Immerse in 30 ml of pure water, boil for 30 minutes, and gradually cool to 30 ° C. After standing at 30 ° C. for 30 minutes, the fiber was used with a centrifugal dehydrator H-770A type manufactured by Domestic Centrifuge Co., Ltd. under a centrifugal force of 1000 G 3
Dehydrate for minutes. After measuring the weight after dehydration (referred to as W1), 9
It is dried at 0 ° C., and the weight is measured (W0), and calculated by the following formula. Water absorption rate (%) = (W1-W0) / W0 x 100

As for the pore diameter, a mercury porosimeter is used as described later, and the average pore diameter of the pores opened on the fiber surface and communicating with the outside is applied pressure (MAX): 30000P.
It is measured by sia. In order to better achieve the object of the present invention, the pores of the porous fiber are those having pores on the fiber surface. When the pores are formed on the surface, the pores are buried inside the fiber. It means not communicating with the outside world, but communicating with the outside world. That is, so-called independent pores that do not communicate with the outside world do not correspond to the pores in the present invention.

Next, the raw acrylic fiber is subjected to an amination treatment using an aminating agent so that 10 to 50 mol% of the nitrile groups in the fiber are modified and the weight increase rate is 10 to 100% by weight. . The amination treatment temperature depends on the heat treatment temperature used for the production of the raw material acrylic fibers as described above, as well as the type, form, composition and aminating agent used, but 10 to 50 mol% of the nitrile group is Modified, and the weight increase rate by the treatment is 10 to 100
It is important to set the weight percent.

When the modification of the nitrile group is less than 10 mol% and the weight increase rate is less than 10% by weight, the amount of amino groups introduced into the fiber to be treated is small and the amount of adsorption of acid and / or aldehyde (saturated adsorption amount) is small. It is low and the adsorption rate is slow. Modification of nitrile group exceeds 50 mol% and weight increase rate is 100
If the amount exceeds 5% by weight, the amount of introduced amino groups increases, but the fibers have drawbacks such as swelling in water and the like, and the fibers do not have sufficient fiber strength to pass through the processing steps such as spinning and nonwoven fabric processing. The degree of the amination of the present invention is 10 to 5 of the nitrile group.
0 mol% is modified, and the weight increase rate by the treatment is 1
Regarding the conditions of 0 to 100% by weight, the reaction temperature,
It can be easily determined by clarifying the relationship between the reaction factors such as concentration and time and the increase of nitrogen content by experiments.

The aminating agent in the present invention is a compound having a bifunctional or more salt-unsubstituted amino group, such as ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine and the like. One or more selected from polyethylene polyamines may be mentioned. Furthermore, the molecular weight having an amino group without salt substitution is 200 to 100.
Polyethyleneimine which is 00 is also mentioned as a more suitable aminating agent. Examples of such imines include polyethyleneimine 600, polyethyleneimine 1800, polyethyleneimine 10000 and the like.

In the present invention, the acid and / or the acid adsorbed by the aldehyde-adsorbing fiber means, for example, formic acid, acetic acid, propionic acid which are components contained in tobacco odor, lower carboxylic acid contained in sweat odor, butyric acid and isovaleric acid. , Carboxylic acids such as caproic acid, capric acid, and pelargonic acid, and inorganic acids such as hydrochloric acid, nitric acid, and sulfuric acid, and the aldehydes include aldehydes having an aldehyde group such as formaldehyde, acetaldehyde, and propionaldehyde.

The amination treatment using these aminating agents is carried out as follows, although not particularly limited thereto. That is, a raw material acrylic fiber is filled in a container equipped with a pump circulation system, and an aminating agent concentration of 100% or an aqueous solution is poured into the container for heat treatment. The bath ratio is appropriately determined according to the size of the container and the like, but is 3 to 1 with respect to the raw acrylic fiber.
A weight of 0 times is preferably adopted. Further, depending on the processing temperature, it may be carried out under pressure. As a typical example of such an apparatus (container provided with a pump circulation system), a pressure type Overmeier dyeing machine and the like can be mentioned.

The present invention includes an acid and / or aldehyde adsorbent fiber structure containing 5% by weight or more of an acid and / or aldehyde adsorbent fiber as a part of its constitution. As the appearance form of the structure of the present application, yarn, yarn (including wrap yarn),
There are filaments, woven fabrics, knitted fabrics, non-woven fabrics, paper-like products, sheet-like products, laminated products, cotton-like products (including spherical and lumpy products), and there are also those provided with a jacket. The fiber of the present invention may be contained in the structure in such a manner that it is substantially uniformly distributed by mixing with other materials. In the case of a structure having a plurality of layers, any one of the layers (single or plural) may be used. However, there are those that are concentrated in each layer, and those that are distributed in a specific ratio in each layer. Therefore, the structure of the present invention has innumerable combinations of the appearance form and the inclusion form exemplified above. Since the structure of the fiber of the present invention has many functions as described above, the structure of the final product should be used (for example, seasoning, motility, inner garment, inner garment, outer garment, or garment). And carpets, bedding and cushions, how to use as insoles and air conditioners, etc.), required functions, and how the fiber of the present invention contributes to expressing such functions. It is determined.

Further, when the structure is viewed in detail, the fiber of the present invention alone or only in a state of being mixed almost uniformly with other materials, to which other materials are attached, adhered, fused,
2-5 for laminating or laminating by sandwiching
There is a laminate of a plurality of layers. In addition, although there is a laminated structure, there is also a laminated structure in which a support body maintains the laminated structure without positive bonding.

The applications of the final product using the structure of the present invention are, as mentioned earlier, roughly classified as those worn by people, beddings, pillows, beddings such as cushions,
Adsorption of harmful gas such as formalin generated from interior products such as cartes and carpets, furniture, building materials,
There are other fields such as deodorant materials. Then, according to each application, an optimum structure is selected, such as a single layer to a plurality of layers to further satisfy the required function, and further including the outer layer to cover the layer.

The structure of the present invention comprises 5% by weight or more of the acid and / or aldehyde adsorbing fiber of the present invention. Therefore, other materials such as fiber, rubber, rubber,
Resins, plastics and the like are used together in a proportion of 95% by weight or less of the whole, but the structure is the fiber of the present invention, namely 100
When the content is wt%, naturally, no other materials are used together. Usually, when a structure is formed by blending with other fibers, the amount of the fibers of the present invention used is 5% by weight or more, preferably 1
It is 0% by weight or more. If it is less than 5% by weight, a sufficient level of function cannot be exhibited even with the fiber of the present invention.

The combined use of other materials is useful for further enhancing the function of the structure. That is, the fiber of the present invention has the functions as described above, but by forming it as a structure, it is possible to further enhance the so-called fashionability such as imparting a higher function, giving a preferable texture, and vivid dyeability. Of. In addition, the effect of improving the workability of blended spinning can be expected. Further, it is more desirable to mix it with deodorant fiber, deodorant fiber, antibacterial fiber, etc. which have been conventionally known so that further effect can be imparted. No other limitation is recognized as other fibers used together in the structure, and publicly-used natural fibers, organic fibers, semi-synthetic fibers, synthetic fibers are used, and inorganic fibers and glass fibers are also used depending on the application. You can The material that can be used in combination is not limited to fibers, and plastics, rubbers, etc. that are laminated with the film as described above or embedded in the film to form a structure can also be used. Examples of particularly preferable other fibers include natural fibers such as wool and cotton, polyester,
Synthetic fibers such as polyamide and polyacrylic fibers, rayon, polynosic fibers and the like.

That is, the fiber structure containing the fiber of the present invention in an amount of 5% by weight or more, by cooperating with the partner material used in combination, can exhibit a sufficient function even if a small amount of the fiber of the present invention is used, and further has another function. Since they can be combined, many end products can be provided.

When the fiber of the present invention is used as a non-woven fabric, paper, or sheet which is a structure often adopted, the adsorptive fiber of the present invention is a short fiber, and the cellulose fiber, pulp, synthetic fiber, etc. Can be used as appropriate. Particularly in applications where dimensional stability is required, a structure comprising the fiber of the present invention and a heat-bonding fiber (preferably a mixing ratio of 5 to 80% by weight) is recommended. The heat-adhesive fiber can be used as long as it has heat-adhesive properties, and examples thereof include fibers having a low melting point and a high melting point component such as polyethylene-polypropylene, polyethylene-polyester, and polyester-polyester. The structure using the fiber of the present invention is suitable for use in exhibiting acid and / or aldehyde adsorption, and is also useful for, for example, chest of drawers, tatami mats, wallpaper, flooring, ceiling cloth, etc. is there.

The acid and / or aldehyde adsorbing fiber of the present invention has a high adsorbing capacity, that is, a saturated adsorbing amount and an adsorbing rate, but its regeneration is also easy. Acid and / or aldehyde once adsorbed is released by applying clean air,
The adsorption capacity of the fiber can be easily regenerated, but in order to regenerate more efficiently, a method of treating with a dilute aqueous solution of an alkaline compound such as ammonia water or sodium hydroxide and washing with water can also be adopted.

[0027]

The present invention will be described in detail with reference to the following examples. Parts and percentages in the examples are by weight unless otherwise specified. The average pore diameter, water absorption rate, acid or aldehyde adsorption capacity, HCl consumption (meq / g) as an index showing the amount of amino groups, and NaOH consumption as an index showing the amount of H-type carboxyl groups described in the examples. (Meq /
g), the nitrile group modification rate was determined by the following method. Also, all gas adsorption experiments were conducted under atmospheric pressure (1.01 × 10 ⁵ P
a).

(1) Average Pore Diameter (nm) Using a mercury porosimeter, the average pore diameter of the pores opened on the fiber surface and communicating with the outside is applied pressure (MAX):
It was measured at 30,000 Psia. (2) Water absorption 80 Approximately 10 g of acrylic fiber disentangled with a hand card
It is immersed in 0 ml of pure water, boiled for 30 minutes, and then gradually cooled to 30 ° C. After standing at 30 ° C. for 30 minutes, the fiber was used with a centrifugal dehydrator H-770A type manufactured by Domestic Centrifuge Co., Ltd. under a centrifugal force of 1000 G 3
Dehydrate for minutes. After measuring the weight after dehydration (referred to as W1), 9
It is dried at 0 ° C., and the weight is measured (W0), and calculated by the following formula. Water absorption rate (%) = (W1-W0) / W0 x 100

(3) Consumption of HCl (meq / g) About 1 g of sufficiently dried test fiber was precisely weighed (X1) g, and 200 ml of water and 0.1N HCl aqueous solution (Y1) 2
Add 0 ml and stir for 1 hour. The fibers are filtered off with a glass filter, and the filtrate is neutralized and titrated with 0.1N-NaOH aqueous solution by a conventional method using methyl red as an indicator. The consumption amount (Y2) ml of the NaOH aqueous solution required for neutralization is obtained, and the consumption amount of HCl is calculated by the following formula. HCl consumption (meq / g) = (0.1 (Y1-Y
2)) / X1 Since this method measures basic groups, the above values can be used as an index of the amount of amino groups present in the fiber.

(4) NaOH consumption (meq / g) About 1 g of sufficiently dried test fiber was precisely weighed (X2) g, and 200 ml of water and 0.1N caustic soda aqueous solution (Z
1) Add 20 ml and stir for 1 hour. The fibers were filtered off with a glass filter, and the filtrate was washed with 0.1N-hydrochloric acid aqueous solution,
Neutralization titration is performed by a conventional method using phenolphthalene as an indicator. The consumed hydrochloric acid aqueous solution consumption (Z2) ml is calculated, and the NaOH consumption is calculated by the following formula. NaOH consumption (meq / g) = (0.1 (Z1-Z
2)) / X2 Since this method measures acidic groups, the above values can be used as an index of the amount of H-type carboxyl groups present in the fiber which is a side reaction product.

(5) Modification rate of nitrile group (mol%) N% of the raw acrylic fiber was measured by CHN Coda-MT3 manufactured by Yanagimoto Seisakusho Co., Ltd. and converted into a molar amount of nitrile group. Next, with respect to each of the raw material acrylic fiber and the amination-treated fiber made of the raw material, 2.0 mg of finely chopped fiber and 200.0 mg of KBr were weighed and sufficiently pulverized and mixed using an agate mortar, and the mixture was put into a tablet molding machine and pressure 98
Mold at MPa. Shimadzu F for the obtained tablets
The absorption intensity of the nitrile group at 2250 cm ^-1 was measured by TIR and Type-8700, and the absorption intensity ratio of the amination-treated fiber to the raw material acrylic fiber was determined, and this was defined as the modification rate (mol%) of the nitrile group.

(6) 1 g of the test fiber absolutely dried at an acid gas adsorption capacity of 105 ° C. is allowed to stand in a standard condition atmosphere of 20 ° C. and 65% RH for 10 hours or more to control temperature and humidity.
This fiber is put in a tedra bag, which is hermetically sealed and injecting acetic acid gas to a concentration of 30 ppm, left at 20 ° C. for 2 hours, and then the gas concentration in the container is measured by a gas detection tube. The adsorption rate is calculated from the residual gas concentration and the initial gas concentration. (7) Aldehyde adsorption capacity 1 g of the test fiber that has been absolutely dried at 105 ° C. is allowed to stand for 10 hours or more in a standard condition atmosphere of 20 ° C. and 65% RH to control temperature and humidity.
This fiber is put in a tedra bag, which is hermetically sealed and injected with acetaldehyde or formaldehyde gas to a concentration of 30 ppm, and the mixture is allowed to stand at 20 ° C. for 2 hours, and then the gas concentration in the container is measured by a gas detection tube. The adsorption rate is calculated from the residual gas concentration and the initial gas concentration.

Examples 1 to 6 and Comparative Examples 1 to 2 As shown in Table 1, acrylonitrile (AN), methyl acrylate (MA) and soda methallylsulfonate (M
Using 4 kinds of AN polymers prepared by changing the polymer composition using AS), they were each dissolved in a concentrated aqueous solution of soda rhodanate to prepare spinning stock solutions. Using these spinning solutions, a 12% aqueous solution of soda rhodanate as a coagulation temperature shown in Table 1 was spun out as a coagulation bath, followed by washing with water and 10 times stretching, and the resulting undried fiber was heated at 120 ° C. Relaxing heat treatment using a steam under conditions of 5 minutes, and further drying at 100 ° C. for 20 minutes, and then 5 kinds of raw material acrylic fiber No. 1-5 were created. The properties of each acrylic fiber are shown in Table 1.

[0034]

[Table 1]

As shown in Table 2, the prepared raw material acrylic fibers were subjected to an amination treatment by changing the amination treatment conditions such as the kind, concentration, temperature and time of the aminating agent. The performance of each amination treated fiber is shown in Table 2. In addition, the raw material acrylic fiber No. 1, No. 2, No. Table 3 shows the results of Examples 5 and 6 and Comparative Examples 1 and 2 in which Amination Treatment No. 5 was used and the amination treatment was performed under the conditions shown in Table 3.

[0036]

[Table 2]

[0037]

[Table 3]

As shown in Table 2, a temperature higher than the amination treatment temperature by 5 to 25 ° C. is adopted as the heat treatment temperature of the raw material acrylic fiber, and the modification rate and weight increase rate of the nitrile group due to the amination treatment are also appropriate. It is understood that the adsorptive fibers of the present invention of Examples 1 to 4 are fibers having a small decrease in fiber strength and a high adsorptivity for acidic gas and aldehyde. Acrylic fiber No. 1 having substantially no pores. Although Example 5 using 1 also showed gas deodorizing property, modification of the nitrile group by amination treatment and weight increase were not sufficient, and it was limited to applications requiring high deodorizing ability, The versatility was not sufficient. Raw material acrylic fiber No. 1 having a larger average pore size Although Example 6 using No. 5 resulted in a fiber having low strength by the amination treatment, it can be sufficiently applied to a field in which sufficient gas adsorbing property is recognized and the requirement for fiber strength is low and the degree of processing is small. Is. On the other hand, in Comparative Example 1 conducted at an amination treatment temperature lower than the heat treatment temperature by 30 ° C. or more, although the weight increase was moderate, the modification rate of the nitrile group and, as a result, the gas adsorbability was low.
Further, Comparative Example 2 having a high amination treatment temperature and close to the heat treatment temperature was a brittle fiber and could not even be used for performance evaluation.

Example 7 A 1/52 meter count (twist number 360) twisted uniformly from 10 parts of the adsorbent fiber of the present invention prepared in Example 2 and 90 parts of acrylic fiber (Exlan K891-3d × V64)
T / M) was spun according to a standard method. This yarn was dyed and softened using a dye dyeing machine, knitted on a fawn according to a standard method on a knitting machine, and then sewn on a polo shirt. After passing this polo shirt to five female panelists and conducting a wearing test for one month, we summarized the feeling of wearing with an unpacked method and obtained a reply that the smoker's unpleasant odor was reduced especially by smokers. It was In addition, there was a reply that there is little sweat odor. From this, it is understood that the deodorizing property of the adsorptive fiber of the present invention is effective against the tobacco odor caused by acids and aldehydes.

[0040]

EFFECTS OF THE INVENTION It is a remarkable effect of the present invention that the advent of the present invention can industrially provide an acid and / or aldehyde gas adsorbing fiber that maintains fiber properties practically no problem. . Furthermore, since it can be processed into various forms such as non-woven fabric, knitted fabric, and woven fabric, it is widely used in various fields of application in which adsorption of acid and / or aldehyde gas is required. For example, underwear, underwear, langerie, pajamas, baby products,
Garments, brassieres, socks, tights, leotards, trunks and other clothing items, sweaters, trainers, sweaters
Tool, sportswear, scarf, handkerchief, muffler,
Artificial fur, middle and outer clothing applications such as baby products, futon, futon,
Bedding such as pillows, stuffed animals, stuffed cotton, sheets, blankets, cushions, bedding, carters, carpets, mats,
Interior accessories such as wallpaper, plush toys, artificial flowers, artificial trees, sanitary materials such as masks, incontinence shorts, wet tissues, car seats, interior goods such as interiors, toilet covers, toilet mats, pet toilets, etc. Toilet articles, refrigerators, kitchen articles such as linings for garbage cans, water purification elements such as filters for appreciation fish and fish tanks, bath filters, wastewater treatment filters, air conditioner filters, air purifier filters, cleaners -Air for filters-filters for dehumidifiers-elements for air conditioning equipment such as gas filters for commercial use-industrial materials such as gas adsorption tower fillings, etc., insoles, slippers, gloves, towels, rags , Rubber gloves linings, boots linings, adhesives, garbage processing equipment, adsorbents, supporters, perspiration pads, interlinings and the like.

The fiber can be used alone or of course, but it can be used more effectively in the above-mentioned fields by using it by mixing or mixing with other fiber or the like. For example, when it is used as a batting or a non-woven fabric such as a futon, it is mixed with other fibers such as polyester and used to impart performances such as bulkiness. In addition, an adsorbent intended for a wider range can be obtained by mixing with an adsorbent other than the acid and / or aldehyde gas.
In this way, it can be used in combination with various other materials for the purpose of imparting other functions and for the purpose of lowering the mixing ratio of the fibers. Further, it can be used as a water treatment agent, a metal adsorbent or the like as an ion exchanger.

Claims (5)

[Claims] 1. An acid- and / or aldehyde-adsorptive fiber obtained by aminating the nitrile group of acrylic fiber with an aminating agent, wherein the raw material fiber is 5 to 30 from the amination temperature.
Acrylic fiber that has been subjected to heat treatment at a high temperature of 0 ° C., wherein 10 to 50 mol% of the nitrile groups in the fiber are modified by the amination treatment, and the weight increase rate due to the treatment is 10 to 10.
An acid and / or aldehyde adsorbent fiber characterized by being 100% by weight. 2. The acid- and / or aldehyde-adsorptive fiber according to claim 1, wherein the aminating agent is one or more selected from polyethylene polyamines. 3. The aminating agent has a molecular weight of 200 to 1000.
The acid- and / or aldehyde-adsorptive fiber according to claim 1, which is a polyethyleneimine of 0. 4. The acrylic fiber is a porous fiber in which pores having a pore size of 10 to 100 nm are connected and further opened on the fiber surface, and the water absorption thereof is 20 to 100.
The acid- and / or aldehyde-adsorptive fiber according to any one of claims 1 to 3, characterized in that it is contained by weight. 5. An acid- and / or aldehyde-adsorptive fiber structure, comprising 5% by weight or more of the acid- and / or aldehyde-adsorptive fiber according to any one of claims 1 to 4.