JPH11172574A - Deodorant fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain deodorant fibers having excellent absorbability especially to an aldehyde gas by applying an aldehyde gas absorber carrying a specific polyamine compound to a specific porous silicon dioxide. SOLUTION: This deodorant fiber is obtained by preparing an aldehyde gas absorber by carrying a polyamine compound expressed by the formula: H2 N-(CH3 CH3 -NH)n -CH2 CH2 NH2 (n) is 0-3} in an amount of 0.02-2.0 mmol to 1 g of a porous silicon dioxide having 400-900 m<2> /g, preferably 500-900 m<2> /g specific surface area, 0.1-10 nm, preferably 2-8 nm average pore diameter and 0.5-20 wt.%, preferably 8-15 wt.% water content and applying a mixture of 0.1-20 pts.wt., preferably 0.5-10 pts.wt. of the aldehyde gas absorber and 100 pts.wt. of a resin for natural or synthetic fibers to the fibers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing fiber which can exhibit excellent deodorizing performance and is particularly excellent in aldehyde gas absorption. The deodorant fiber of the present invention can be used for various fiber products as a conjugate fiber, a woven fabric, a nonwoven fabric, etc., and is useful as a raw material for various fiber products such as clothing, sheets, covers, curtains, and carpets.

[0002]

2. Description of the Related Art In recent years, the need for deodorization by consumers has been rapidly increasing, and various types of housing equipment such as curtains for houses and hospitals, air conditioners for automobiles, filters used for filters of electric products, and textiles used for clothes, etc. Attempts have been made to impart deodorant properties. A cigarette odor is regarded as a problem particularly as a deodorizing object.
JP-A-282926 and JP-A-62-282927 disclose a deodorant comprising a magnesium silicate clay mineral. It is known that an amine compound has a high affinity for an aldehyde gas, and that an aldehyde gas in an exhaust gas can be removed by contacting an exhaust gas containing the aldehyde gas with a solution in which the amine compound is dissolved (JP-A-51-44587). ). Further, a gas absorbent in which an amine compound is supported on a heat-resistant inorganic substance is known, and this gas absorbent has a characteristic that can withstand heat treatment when added to a resin, papermaking, or film. For example, activated carbon can be loaded with an ammonium salt, aniline, or the like (JP-A-53-292).
92, JP-A-56-53744), a compound having a primary amino group in a molecule is supported on a magnesium silicate clay mineral (JP-A-9-28778), or an interlayer of a layered phosphate (α-zirconium phosphate) is used. Gas absorbers on which polyamine compounds are supported are known.
RM. TECH. JAPAN Vol.12.No.12 PP77-87
(1996)). Further, a carbon dioxide gas absorbent having an amino alcohol supported on silica (JP-A-53-23899) and a deodorant having a polyallylamine supported on silica (JP-A-63-1983).
141644) and a molecular weight of 110 per N atom
Hereinafter, a carbon dioxide absorbent in which an amine compound having a boiling point of 100 ° C. or more and water are supported on silica gel (Japanese Patent Laid-Open No.
200742) is known. However, it is difficult to say that these gas absorbents have a sufficient practical ability to absorb aldehyde gas, and there is a problem that fibers containing them have insufficient deodorizing properties.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a deodorant fiber which has improved the deodorant performance and has improved disadvantages of the conventional deodorant fiber.

[0004]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that it is extremely effective to include an aldehyde gas absorbent in which a specific polyamine compound is supported on a specific porous silicon dioxide in a fiber. This led to the completion of the present invention. That is, the present invention has a specific surface area of 4
100 to 900 m 2 / g and an average pore diameter of 0.1 to
The polyamine compound represented by the following formula is used in an amount of 0.02 to 2.0 mm per 1 g of the porous silicon dioxide having a thickness of 10 nm.
This is a deodorant fiber containing an aldehyde-supported aldehyde gas absorbent.

[0005]

Embedded image

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. ○ Silicon dioxide The silicon dioxide in the present invention has a specific surface area of 400 to 9
00 m ² / g and an average pore diameter of 0.1 to 10 nm
Is a porous silicon dioxide. A preferred specific surface area is 500 to 900 m ² / g, and a preferred average pore diameter is 2 to 8 nm. Commercially available products of porous silicon dioxide include silica gel and nip seal (hydrous silicon dioxide containing fine particles). If the specific surface area is too small, the contact area between the polyamine compound and the aldehyde gas decreases, and the gas adsorption amount is impaired. On the other hand, if the specific surface area is too large, the polyamine compound is adsorbed too much, and when added to fibers or the like and kneaded, it is likely to cause discoloration by heating. The specific surface area is the BE calculated from the amount of adsorbed nitrogen.
It can be easily measured by the T method. On the other hand, when the average pore diameter is too large, the specific surface area decreases, the amount of the polyamine compound supported decreases, and the gas adsorption performance of aldehydes decreases. If an attempt is made to make the specific surface area sufficiently large despite the fact that the average pore diameter is too large, the porosity of the porous body becomes too large, the mechanical strength becomes small, or the ability to support the polyamine compound becomes weak. However, there is a problem that the polyamine compound is released by a slight heating. On the other hand, if the average pore diameter is too small, the specific surface area of silicon dioxide increases, but it becomes difficult for the polyamine compound to enter the pores. As a result, the amount of the polyamine compound carried cannot be increased, and the gas absorption capacity decreases. The average pore diameter (D) is easily calculated from the pore volume and the specific surface area obtained by the BET method using the following formula.

[0007]

(Equation 1)

The preferred water content of silicon dioxide in the present invention is 0.5 to 20% by weight, more preferably 8 to 20% by weight.
１５15% by weight. When the water content is less than 0.5% by weight, the supporting force on the polyamine compound in the present invention is small because the surface has few silanol groups. Conversely, when the water content is more than 20% by weight, when kneaded with the resin, coloring,
It causes foaming and deterioration. The water content of silicon dioxide is J
It can be easily measured according to IS K7120-7122.

Polyamine compound The polyamine compound in the present invention has a primary amino group in the molecule and is represented by the following formula.

[0010]

Embedded image

The above polyamine compound is liquid at room temperature, has a high decomposition temperature and a high boiling point, and has a primary amino group having high reactivity with aldehyde gas. The loading amount of the polyamine compound is 0.00 g / g of the porous silicon dioxide.
2 to 2.0 mmol. If the supported amount is too small, the absorption capacity of the aldehyde gas decreases, and if the supported amount is too large,
When kneaded with the fibers, the polyamine compound jumps out of the silicon dioxide, causing discoloration, and the polyamine compound itself has an offensive odor. Also, the aldehyde absorption is reduced. The supported amount of the polyamine compound can be easily calculated from the nitrogen content detected by organic element analysis.

The aldehyde gas absorbent in the present invention is:
Usually obtained in powder form, the preferred average particle size is 0.01 to 5
0 μm, more preferably 0.1 to 20 μm, and still more preferably 0.1 to 5 μm. If the average particle size is less than 0.01 μm, there are problems such as difficulty in handling and easy reaggregation, which is not preferable. Also, 50μ
When it is larger than m, there is a problem that it is difficult to uniformly disperse the fiber when it is spun into fibers, and the yarn is liable to be broken.

The absorbent in the present invention is particularly effective for aldehyde gas. Examples of the aldehyde gas include acetaldehyde and formaldehyde. Also,
Depending on the target gas, it is of course possible to mix with other deodorants or use them together. The aldehyde gas absorbent used in the present invention is stable against exposure to heat and light, has almost no change in structure and composition even after heating at 200 ° C. or higher, and does not change color even when irradiated with ultraviolet light. Do not wake up. Further, no change in the skeleton structure is observed even when the skeleton is brought into contact with water in a liquid state.

Method for Preparing Aldehyde Gas Absorbent The aldehyde gas absorbent of the present invention can be easily obtained by mixing the above-mentioned silicon dioxide with a polyamine compound. By mixing a solution of the polyamine compound in water or the like with silicon dioxide, the polyamine compound can be uniformly supported. Excess polyamine compound not supported on silicon dioxide can be washed with water or the like. The aldehyde gas absorbent of the present invention can be obtained by drying the obtained composite at, for example, 50 ° C to 120 ° C and pulverizing the composite.

The deodorant fiber of the present invention is a fiber containing the above-mentioned aldehyde gas absorbent. The fiber may be any of a natural fiber and a synthetic fiber, and may be any of a short fiber, a long fiber, and a composite fiber having a core-sheath structure. The aldehyde gas absorbent of the present invention has excellent heat resistance and does not deactivate the deodorant performance even at a high temperature of 200 ° C. Therefore, the aldehyde gas absorbent is exposed to a high temperature when the aldehyde gas absorbent is contained in the fiber resin. There is no problem even if it is performed, and most resins can be used as the resin for fibers. Examples of preferred natural fibers include pulp, hemp, cotton, silk and wool, and examples of preferred synthetic fibers include polyester, nylon, acrylic, polyethylene, polyvinyl alcohol, polyvinylidene, polyurethane and polystyrene. The resin of the synthetic fiber may be a homopolymer or a copolymer. In the case of a copolymer, the polymerization ratio of each monomer component is arbitrarily controlled according to the desired properties for the fiber. can do.

The method for incorporating the aldehyde gas absorbent into the fiber is not particularly limited. For example, spinning such as melt spinning, dry spinning, and wet spinning is performed using a fiber resin to which the aldehyde gas absorbent is previously blended. Alternatively, an aqueous or organic suspension containing an aldehyde gas absorbent and a binder can be applied to the fiber surface by a method such as coating or dipping, and the fiber can be coated on the fiber surface by removing the solvent. . If necessary, a surfactant or a dispersant may be added to the aqueous or organic suspension to improve the dispersibility of the aldehyde gas absorbent. , Nonionic, cationic and the like. The binder for increasing the adhesion to the fiber surface is not particularly limited as long as the adhesion is obtained after removing the solvent.

The proportion of the aldehyde gas absorbent contained in the fibers is not particularly limited, but is preferably 0.1 to 20 parts per 100 parts by weight of the resin for natural fibers or synthetic fibers (hereinafter simply referred to as "parts"), more preferably. Is from 0.5 to 10 parts. Also, if desired, the fiber may have a matting agent, a coloring agent, an antioxidant, a fluorescent brightener, a stabilizer, a flame retardant, an antibacterial deodorant,
Various additives such as a fungicide, a fragrance, an infrared absorber and an ultraviolet absorber can be contained, and the content thereof may be appropriately adjusted according to a conventional method.

Use The aldehyde gas absorbent of the present invention has an excellent aldehyde gas absorption effect against odors such as formaldehyde and acetaldehyde, and can be used in various fields where conventional deodorants such as activated carbon are used. In the fiber containing the aldehyde gas absorbent, excellent gas absorption characteristics inherent to the aldehyde gas absorbent can be exhibited. The deodorant fibers of the present invention include, for example, underwear, stockings, socks, futons, duvet covers, cushions, blankets, carpets, curtains, sofas, car seats, air filters, masks, handkerchiefs, hats, mufflers, shirts, mattresses, pillow covers It can be used for many textiles, including work clothes, tablecloths, curtains, paper, cardboard, non-woven fabric, towels, bedding, pajamas, etc. Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples.

[0019]

EXAMPLES AND COMPARATIVE EXAMPLES Preparation of aldehyde gas absorbent The aldehyde gas absorbent of the present invention was obtained by the following method. 1 g of silicon dioxide powder is added to a predetermined amount of the polyamine compound, and 10 g of pure water is further added, followed by sufficient stirring. Shake at 40 ° C. for 2 hours. Then, the slurry was filtered through a Buchner funnel, and the filtrate was adjusted to an electric conductivity of 20 with pure water.
Wash until μS / cm or less. 10 washed powders
After drying at 0 ° C. for 12 hours, an aldehyde gas absorbent was obtained. As described above, the aldehyde gas absorbents (A to F) of the present invention (Table 1 below) and the conventional aldehyde gas absorbents (a to h) were prepared (Tables 2 to 4 below).

(Examples 1 to 12 and Comparative Examples 1 to 18) Aldehyde gas absorbents (A to F) and aldehyde gas absorbents (a to h) were added to 100 parts by weight of fiber resin made of polyester or nylon. A masterbatch is prepared in advance by blending parts by weight, and the masterbatch is blended with a resin for textiles composed of the same type of resin so that the ratio of the aldehyde gas absorbent is 2.5% by weight based on the total weight. By melt spinning, a deodorant fiber of about 2 denier was obtained. Fibers without the addition of an aldehyde gas absorbent were produced as blanks (Comparative Examples 17 and 18).

(Examples 13 to 18 and Comparative Examples 19 to 2)
7) 1.5% by weight of an acrylic binder and 3% by weight of an aldehyde gas absorbent (A to F) are applied to a polyester nonwoven fabric, dried at 120 ° C, cured at 180 ° C, and deodorized nonwoven fabric (Examples 13 to 18). Also, for comparison, aldehyde gas absorbents (a to h)
As for (2), a deodorant nonwoven fabric was produced (Comparative Examples 19 to 2).
6). Further, a nonwoven fabric to which no aldehyde gas absorbent was added was produced (Comparative Example 27).

[0022]

[Table 1]

[0023]

[Table 2]

[0024]

[Table 3]

[0025]

[Table 4]

<Experiment> (Evaluation test of deodorant performance) The following experiment was carried out using a sample obtained by cutting the deodorant fiber obtained as described above into a length of about 10 cm. For each of the two gases shown in Table 5 below, two hours after the gas was injected into a container (1 liter) containing 0.5 g of the sample,
The gas concentration in the container was measured using a detection tube (manufactured by Gastech Co., Ltd.). The initial gas concentration when the gas was injected into the container is as shown in Table 5 below. The results of the deodorizing test obtained as described above are shown in Table 6 below.

[0027]

[Table 5]

[0028]

[Table 6]

[0029]

[Table 7]

[0030]

The deodorant fiber of the present invention is particularly excellent in the ability to absorb aldehyde gas, and can be used as a raw material for various deodorant fiber products such as conjugate fiber, woven fabric and nonwoven fabric.

Claims (2)

[Claims] A polyamine compound represented by the following formula is used in an amount of 0.02 to 2 per gram of porous silicon dioxide having a specific surface area of 400 to 900 m ² / g and an average pore diameter of 0.1 to 10 nm. A deodorant fiber comprising an aldehyde gas absorbent supported by 0.0 mmol. Embedded image 2. The porous silicon dioxide has a water content of 0.5 to 2
The deodorant fiber according to claim 1, which is 0% by weight.