JP2001329433A - Textile product, film or their secondary product adsorbing and eliminating unpleasant odor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adsorb and eliminate unpleasant odor of formaldehyde, amines, etc., generating from an adhesive of a plywood often used as an interior material or from a coating or spontaneously generating in daily life by imparting a textile product or film ordinarily present in the room of a house or their secondary products, i.e., daily commodity, bedding, interior goods and interior materials such as curtain and carpet with a function to adsorb and eliminate the unpleasant odor. SOLUTION: The objective fiber is produced by spinning a chitin-chitosan viscose containing 20-80 mol% chitin structure unit and 80-20 mol% chitosan structure unit or a cellulose viscose containing >=3 wt.% chitin-chitosan viscose.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber product and a film for absorbing and removing an unpleasant odor generated in a room or the like, and a secondary product thereof, such as clothing, bedding, curtains, and interior products.

[0002]

2. Description of the Related Art Recently, there has been a problem of unpleasant odor in a room. This unpleasant odor is caused by formaldehyde, acetaldehyde, and the like generated from plywood used in large quantities as a building material, adhesives and paints used everywhere. It is said that this kind of unpleasant odor is felt by a person for a considerable period of time after newly constructing a house. In particular, recent homes are often closed-type because of heat insulation and crime prevention, and in addition to the above items, the problem of unpleasant odors such as ammonia and amine odors generated from household garbage in the room has not been easily solved. . Although the feeling of such an unpleasant odor varies from person to person, this problem is particularly significant for housewives, bedridden elderly people, and infants who are indoors for a long time.

Until now, various measures have been taken to suppress the generation of unpleasant odors and to adsorb and remove unpleasant odor gases. For example, a device using an adsorbent such as activated carbon is installed, or a dedicated deodorizing device using a photocatalyst or the like is arranged in a room. Further, an air conditioner incorporating an odor adsorbent is also known.

[0004] However, among these conventional measures, those using activated carbon are usually difficult to regenerate and use, which increases the cost and requires the use of a special deodorizing tool. there were. A device using a dedicated deodorizing device such as an air purifier is costly and occupies a place. Those using air conditioners had similar problems. In addition, it can be said in common that if there are a large number of rooms, it is not practically possible to install these appliances in all the rooms.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a textile, film, or a secondary product thereof, such as daily necessities, bedding, interior, and interior materials, which are used in ordinary rooms of a house without using special appliances and equipment. For example, curtains, carpets, etc. have the function of absorbing and removing unpleasant odors, so that formaldehyde and amines that are caused by plywood adhesives and coatings that are often used for interior materials or that occur naturally in daily life It is intended to adsorb and remove unpleasant odors caused by such factors.

[0006]

According to the present invention, a chitin structural unit comprises 20 to 80 mol% and a chitosan structural unit comprises 80 to 2 mol%.
Absorbs an unpleasant odor characterized by being composed of fiber spun from 0 mol% of chitin / chitosan viscose alone or a mixture of 3% by weight or more of the chitin / chitosan viscose and cellulose viscose. A fiber product to be removed (claim 1), chitin / chitosan viscose containing chitin structural units of 20 to 80 mol% and chitosan structural units of 80 to 20 mol%, or chitin / chitosan viscose alone;
A film for adsorbing and removing an unpleasant odor characterized by extruding viscose obtained by mixing 3% by weight or more of chitosan viscose with cellulose viscose (claim 2), wherein the textile is used for clothing, bedding, interior and 2. The interior decoration product according to claim 1, wherein the interior decoration product is at least one kind.
The textile product for adsorbing and removing the unpleasant odor according to claim 3 (claim 3), wherein the textile product is a medical auxiliary article. The textile product for absorbing and removing an unpleasant odor according to claim 1, wherein the textile product is a filter material having an unpleasant odor absorbing function (claim 5), and the film is any one of an interior decoration and an interior decoration product. The film for absorbing and removing an unpleasant odor according to claim 2, which constitutes a part of the film, and the interior is a curtain, wherein the interior is a curtain. The textile product for adsorbing and removing an unpleasant odor according to claim 3, wherein the product (claim 7) and the interior are carpets.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The first aspect of the present invention is intended to adsorb and remove unpleasant odors in a room with a fiber product comprising chitin and chitosan. The fiber product used in the present invention has a chitin structural unit of 20 to 80 mol% and a chitosan structural unit of 8%.
Chitin / chitosan alone contained in a ratio of 0 to 20 mol%, or a viscose spun yarn obtained by mixing the viscose with 3% by weight or more, and the other is a fiber product made of a spun yarn. is there.

When the chitin structural unit in chitin / chitosan viscose is less than 20 mol%, it is difficult to obtain a viscose having good spinnability and film-forming properties although there is no problem in the adsorption function. If it exceeds 80 mol%, the ability to adsorb unpleasant odor gas is reduced, and the object of the present invention is not substantially satisfied.

The chitin / chitosan viscose used in the present invention is disclosed in Japanese Unexamined Patent Publication No. Hei 8-92820 previously proposed by the present applicant.
And JP-A-9-241928. In this method, a raw material chitin whose ash content, viscosity, particle size and the like are adjusted is immersed in a heated caustic soda solution for a predetermined time to cause a part of chitin molecules to undergo a deacetylation reaction, and a predetermined chitin-chitosan mixing ratio is obtained. (Usually referred to as DAC ratio) to obtain a chitin / chitosan dispersion. Next, this dispersion is subjected to pressure removal and crushing, and the obtained solid is pulverized, carbon disulfide is added under reduced pressure, and the mixture is stirred to cause a xanthogenation reaction of chitin / chitosan, and crushed ice is further added thereto. It is added, stirred and dissolved to obtain chitin / chitosan viscose.

This chitin / chitosan viscose is defoamed under reduced pressure by itself or a mixture of 3% by weight or more of the chitin / chitosan viscose and cellulose viscose, and is subjected to wet spinning of ordinary viscose rayon. Fibers are formed by spinning by a method. The above-mentioned chitin / chitosan viscose alone or chitin / chitosan viscose mixed with cellulose viscose is extruded into a film by a conventional method of producing cellophane from an extrusion die.

If the mixing ratio of chitin / chitosan viscose is less than 3% by weight, the fiber or film woven from the spun yarn cannot sufficiently absorb the unpleasant odor. The woven or nonwoven fabric of fiber obtained by spinning viscose obtained by mixing chitin / chitosan viscose alone or chitin / chitosan viscose with 3% by weight or more of cellulose viscose can be used for various clothes such as sheets and pillowcases. , Beddings such as bedding, bedding, curtains, carpets, partitions, screens, goodwill, tablecloths, etc., various interior materials such as cloth upholstery, medical aids such as masks, etc. Chitin chitosan film can also be used as various products such as wallpaper after performing necessary processing.

The mechanism of absorption of unpleasant odors such as formaldehyde by the curtains, carpets and the like of chitin / chitosan fibers or films is presumed to be a combination of the following adsorption / desorption actions.

1. Adsorption by forming a Schiff base The basic equation in this case is Here, R means a skeleton of chitin or chitosan.

This Schiff base is an unstable substance, which is decomposed by a slight pH fluctuation of attached water. In other words, the curtain which absorbed formaldehyde in the room by using it indoors for a predetermined period of time is washed with normal washing water (slightly alkaline), whereby the Schiff base attached to the curtain is decomposed, and the formaldehyde generated by decomposition is removed together with the washing wastewater. At the same time, the curtain that has been washed is again a curtain that has recovered its unpleasant odor absorbing function. A film having a chitin / chitosan content of 30% and a deacetylation rate of 80% was left in a container having an atmosphere concentration of 1000 ppm for 48 hours, and the difference infrared absorption chart from the blank film is as shown in FIG.

2. Adsorption by salt formation and others Chitin and chitosan have an amino group and are basic. This base causes a neutralization reaction with the acid gas in the presence of the adsorbed water to form a salt, thereby causing adsorption. This salt formation can be seen from the phenomenon that chitosan dissolves in a dilute hydrochloric acid solution. In addition to this, rayon has a porous structure in which gas escape occurs during spinning. Also,
The surface is cleaned in processes such as scouring, bleaching, and washing until the product is finished, and the surface is adsorbed with gas. Hereinafter, embodiments of the present invention will be described.

[0016]

(Example 1) 2.5 g of three types of sample cotton shown in Table 1 were suspended in a room (15.7 m ³ ) having a formaldehyde concentration of 1 ppm generated from the wall of plywood for 4 days, and the sample cotton was suspended in formaldehyde. Was adsorbed. Thereafter, the cotton was immersed in 100 cc of an aqueous acetic acid solution (pH; 4) at 40 ° C. × 1 h.
r under the condition of r to extract formaldehyde, JIS
The formaldehyde adsorption amount (adsorption amount mg / cotton weight g) of each cotton was measured by the acetylacetone method of L 1041 B. The results are as shown in Table 1. The chitin / chitosan / cellulose composite cotton is composed of chitin / chitosan component 5
1% and its deacetylation rate was 60%.

[0017]

[Table 1]

As is clear from the results in Table 1, chitin
It can be seen that chitosan / cellulose composite cotton absorbs formaldehyde more than other cottons.

Example 2 At a deacetylation rate of 60%, the chitin / chitosan component ratio was 3.2% by weight and 7.
Using 4% and 26.8% chitin / chitosan / cellulose composite fiber, put 12 g of the fiber and 18 l of 16 ppm HCHO gas into a tetrabag having a volume of 30 liter at 25 ° C., and with the passage of time using a Kitagawa detector tube method. The formaldehyde concentration in the bag was measured.

The Kitagawa type gas detector tube (manufactured by Komei Rikagaku Kogyo Co., Ltd.) is characterized by the fact that a compound formed by the reaction of a reagent filled in the detector tube with a gas such as formalin reacts with an indicator incorporated in the detector tube to change color. The reading is performed on a scale to measure the gas concentration. The detection limit of this measuring instrument is 0.01 ppm for formaldehyde, 0.2 ppm for ammonia gas, and 1 pp for acetaldehyde.
m, 0.125 ppm for acetic acid.

[0021]

[Table 2]

As is evident from Table 2, the chitin / chitosan composite fiber adsorbs formaldehyde well with time and with an increase in the chitin / chitosan component ratio.

Example 3 Deacetylation rate 19.5%
Chitin-chitosan component ratio of 5 at 35.0% and 64.5%
Using 1% chitin / chitosan / cellulose composite fiber,
The formaldehyde adsorption amount was measured at a measurement temperature of 25 ° C. in the same manner as in Example 2. The results are shown in Table 3.

[0024]

[Table 3]

As is clear from Table 3, the chitin / chitosan composite fiber increases the amount of formaldehyde adsorbed with the passage of time and as the deacetylation ratio increases.

Example 4 Deacetylation rate 3 of Example 3
The adsorption rates of gases having various initial formaldehyde concentrations were measured by the same measurement method as in Example 2 using a 5.0% sample. The measurement was performed at 25 ° C.

[0027]

[Table 4]

As is apparent from Table 4, the chitin / chitosan composite fiber absorbs formaldehyde well when the initial concentration is high or when it is low.

Example 5 A needle punched nonwoven fabric prepared by mixing the same sample as in Example 3 with an ester fiber was measured for its formaldehyde adsorption ability by the same measurement method as in Example 2. The measurement was performed at 25 ° C. The results are shown in Table 5.

[0030]

[Table 5]

Since the chitin / chitosan composite fiber has excellent formaldehyde adsorption performance even with a needle-punched nonwoven fabric, it can be seen that an unpleasant odor can be adsorbed and removed even by a carpet in a room.

Example 6 A chitin / cellulose conjugate fiber containing 60% of deacetylation and 29% of chitin / chitosan was mixed with an ester fiber at a ratio shown in Table 6 to prepare a 34th yarn. This weft (58 yarns / inch) and the warp (8
A curtain fabric was prepared by using 30th cotton yarn at 5 yarns / inch) to form a curtain, and the formaldehyde adsorption capacity was measured using the curtain. The measurement was performed in the same manner as in Example 2.

[0033]

[Table 6]

As shown in Table 6, it can be seen that formaldehyde adsorption using a curtain made of chitin / chitosan composite fiber is also excellent.

(Example 7) A curtain in which formaldehyde was once adsorbed to saturation was washed at home and the formaldehyde adsorption ability was restored, and the curtain was measured in comparison with the original before washing. The sample used here was the curtain cloth used in Example 6, which had a weft containing 60% by weight of chitin / chitosan / cellulose composite fiber and formalin was saturated and adsorbed.
After washing for 15 minutes using a home-use washing machine with a commercially available detergent top (Lion Co., Ltd., 0.5 g / l, bath ratio 1:40) according to 0217 103, washing with water was performed three times for 10 minutes. For these samples, the formaldehyde adsorption performance was measured. The measurement was performed in the same manner as in Example 2.

[0036]

[Table 7]

As is clear from Table 7, the washed curtain is excellent in the recovery of formaldehyde adsorption performance.

Example 8 As a sample, a composite cotton composed of 51% of chitin / chitosan having a deacetylation ratio of 60% and 49% of cellulose was used. Put the flocculent fiber in 5 l tetra bag
g and 3 l of ammonia gas having a concentration of 400 ppm were charged, and the concentration in the bag was measured over time using a Kitagawa type detection tube for ammonia. The measurement was performed at a temperature of 25 ° C. The results are shown in Table 8.

[0039]

[Table 8]

As shown in Table 8, while the rayon reaches only 1/2 of the initial concentration in 2 hours, the fiber of the present invention reaches about 1/20 of the initial concentration and has a large ammonia gas. It can be seen that it has an adsorption ability.

Example 9 Example 8 was repeated except that acetic acid gas was used instead of ammonia gas and the initial concentration was 30 ppm.
As in the above, the concentration of acetic acid gas in the bag was measured over time. The measurement was performed at a temperature of 25 ° C. The results are shown in Table 9.

[0042]

[Table 9]

As shown in Table 9, when chitin / cellulose cotton is used, acetic acid gas can be rapidly and largely adsorbed and removed.

[Example 10] A measurement example of acetaldehyde will be described. The sample and the measurement method were the same as those in Example 8, but the detection tube used was a Kitagawa type detection tube for acetaldehyde.

[0045]

[Table 10]

As shown in Table 10, when chitin / cellulose cotton is used, acetaldehyde can be rapidly and largely adsorbed and removed.

[Example 11] A measurement example of trimethylamine will be described. The sample and the measurement method were the same as in Example 8, but the detection tube used was a Kitagawa type detection tube for trimethylamine.

[0048]

[Table 11]

Example 12 Chitin / Chitosan Research Vo
l. 2, No2 (1996), P168, according to the report of Sato et al., Water was poured into the lower part of a desiccator (volume: 10 l) in which four commercially available plywood (14 × 4 × 0.8 cm) and a sample were simultaneously sealed, and this water was 23 The amount of formalin absorbed after 21 hours at C was measured. The measurement was performed by the acetylacetone method. The sample used at this time was a curtain fabric made of a chitin / rayon composite yarn / ester mixed yarn 30/1 containing 30% of a chitin component containing 30% of a chitin component of 60%. It was a sheet. Table 1 shows the results.
It is shown in FIG.

[0050]

[Table 12]

As is clear from Table 12, the curtain fabric made of the chitin / rayon composite yarn / ester mixed yarn is
It can be seen that formalin generated from the adhesive of the plywood is well absorbed.

[0052] [Example 13] to create a living model space having an inner volume 31m ³ using a commercially available plywood which generate formaldehyde, half of the internal volume was set the conditions so replaced with the outside air which does not contain formaldehyde per hour . The equilibrium concentration of formaldehyde when left in this state at room temperature for one week or more was 0.12 ppm.

In this space, 15% by weight of a 5-denier chitin / chitosan / cellulose composite fiber containing 30% of chitin / chitosan having a deacetylation rate of 65% and acrylic fiber 8
0.15 m ^{2 of} tufted carpet (weight of chitin / chitosan / cellulose composite fiber: 8.4 g) made of 2.4 cotton count yarn consisting of 5% by weight was added, and the amount of formaldehyde changing with time was determined in Example 1. It measured according to the method. The results are shown in the table below.

[0054]

[Table 13]

Since the WHO (World Health Organization) shows a safety standard of formaldehyde concentration of 0.08 ppm, it can be understood that the safety standard is satisfied in this case.

Example 14 An example of an adsorption test for nonenal, which is a cause of an aging odor, is shown below. As samples, two types of composite cotton, chitin / chitosan 10% and 30% with a deacetylation rate of 60% and cellulose 90% and 70%, were used. Regular woolen cotton was also measured for comparison.

The measuring method was as follows. 0.5 g of flocculent fiber was placed in a 125 ml glass vial, sealed, and then nonenal was injected. The concentration after 2 hours and 24 hours was measured using a gas chromatograph. Table 1 shows the results.
It is shown in FIG.

The measurement temperature was 25 ° C.

[0059]

[Table 14]

[0060]

As described above, according to the present invention, the problem of unpleasant odors such as formaldehyde and amine caused by plywood used as a building material, adhesives used everywhere, painting, garbage, etc. Can be adsorbed and removed with textiles or films commonly used in daily life, such as curtains, carpets, bedding, and clothing. This means that indoor unpleasant odors can be removed without using a special device such as a cleaner, and the above-mentioned daily necessities are widely scattered throughout the house. The advantage that the unpleasant odor can be widely absorbed and removed can be obtained. Further, the textile product of the present invention recovers its gas adsorption performance by washing, so that its function and effect can be maintained for a long period of time, and it is also excellent in economic efficiency.

[Brief description of the drawings]

FIG. 1 is a difference infrared absorption chart of a film adsorbing formaldehyde with a blank film.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // B29K 1:00 B29K 1:00 B29L 7:00 B29L 7:00 (72) Inventor Kenji Hayasaki Hyogo 850, Ikeda, Onoe-cho, Kakogawa-shi No. 333, Omikenshi company house (72) Inventor Yasuyuki Miyamoto 850, Ikeda, Onoe-machi, Kakogawa-shi, Hyogo Omikenshi male dormitory F-term (reference) 3B120 AA04 AA14 AD12X AD12Y AD12Z AD18X AD18Y AD18Z BA03 DB02 EB23 EB25 EB23 EB25 EB25EB080 AA05 BB02 CC02 HH05 JJ05 JJ06 KK08 LL02 LL03 MM23 NN24 QQ03 4F207 AA01 AA49 AG01 AH48 AH51 KA01 KA04 KA17 KL84 4L035 AA04 BB03 EE20 FF01 FF04

Claims (8)

[Claims] 1. A chitin / chitosan viscose containing 20 to 80 mol% of a chitin structural unit and 80 to 20 mol% of a chitosan structural unit, or 3% by weight or more of the chitin / chitosan viscose and cellulose bis. A fiber product that adsorbs and removes unpleasant odors, which is made of fiber spun from viscose mixed with a course. 2. A chitin / chitosan viscose containing 20 to 80 mol% of a chitin structural unit and 80 to 20 mol% of a chitosan structural unit alone or 3% by weight or more of the chitin / chitosan viscose and cellulose bis. A film for adsorbing and removing unpleasant odors, characterized by extruding viscose mixed with a course. 3. The textile product according to claim 1, wherein the textile product is any one of clothing, bedding, interior decoration, and interior decoration. 4. The textile product according to claim 1, wherein the textile product is a medical auxiliary article. 5. The textile product according to claim 1, wherein the textile product is a filtering material having an unpleasant odor absorbing function. 6. The film for adsorbing and removing an unpleasant odor according to claim 2, wherein the film constitutes a part of any interior or interior decoration product. 7. The textile product according to claim 3, wherein the interior is a curtain. 8. The textile product according to claim 3, wherein the interior is a carpet.