JPS6023617B2 - dust control products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dust control product that has sustained antibacterial properties and an excellent dust control effect, and more specifically, the present invention relates to a dust control product that has sustained antibacterial properties and an excellent dust control effect. This invention relates to a dust control product that prevents proliferation and improves adsorption and retention of dust and dirt.

Dust control products such as traditional water cleaners and so-called chemical cleaners all remove dust from the surfaces to be cleaned.
Cleaning is performed by moving dirt, etc. to the fiber surface and holding it by adsorption on the fiber surface.

Dust, dirt, etc. have a suitable amount of moisture and nutrients for microorganisms, and the dust control product after use is in a state where microorganisms are extremely likely to breed due to the presence of dust, dirt, etc. attached to it. The most common means to prevent the growth of microorganisms in textile products for dust control is to treat the fiber matrix with an antibacterial agent, or to incorporate the antibacterial agent into a dust adsorption/collection agent such as an oil agent. However, the problem with such measures is that their effects are not sustainable.

The present inventors have proposed that fiber substrates for dust control such as cloths, dust cloths, dusters, mops, mats, etc. have a cation exchange state of at least 0.1 millivalent (meq)/ta or more and a water retention capacity of 300 to 60% by weight. When this fiber matrix is treated with a basic nitrogen-containing compound that has antibacterial properties, the antibacterial organic chlorine is fixed to the dust control fiber matrix by ion exchange, and the fiber matrix is treated with a basic nitrogen-containing compound that has antibacterial properties. It has been found that not only permanent antibacterial properties are imparted to the substrate, but also properties such as dust and dirt adsorption and dust retention are significantly improved.

That is, according to the present invention, basic nitrogen having antibacterial properties is added to a fiber substrate for dust control containing synthetic fibers having a cation exchange capacity of at least 0.1 meq/ta or more and a water retention capacity of 300 to 60% by weight. A dust control product is provided, characterized in that the compound is fixed in an amount of 0.1 to 1% by weight per synthetic fiber.

The present invention will be explained in detail below.

The synthetic fiber used in the present invention has a molecular weight of at least 0.1 meq/ta, particularly preferably 0.5 to Sheq
When used as a dust control product, it has a cation exchange range of 300 to 600% by weight and a water retention of 350 to 500% by weight. This is important for developing dust retention properties.

In this specification, water retention is defined as a value determined by the following measurement method. That is, the sample was immersed in 20° C. for 2 minutes, spread on a wire mesh for 2 minutes, and left to allow water droplets to fall. Water retention according to the following formula: Weight released for 2 minutes - Weight before bonding XI.

〇 Based on the weight before immersion, calculate the average value of the three samples and use it as water retention (%). First, it is important for the synthetic fibers used in the present invention to have water retention within the above-mentioned range in terms of dust adsorption and dust retention.

This water retention property is closely related to the leakage or retention property of the fibers due to dust adsorption solutions such as water or oil, and fiber materials whose water retention property is lower than a certain standard value have poor dust adsorption properties and dust retention properties. inferior to sex. Conventionally, cotton fiber, which has been most commonly used as a fiber substrate for dust control, has a water retention capacity of approximately 450%, whereas ordinary synthetic fibers such as nylon have a water retention capacity of less than 200%. It will be understood that the synthetic fibers used in the present invention have water retention properties similar to those of cotton. As will be described in detail later, this water retention is influenced by the amount of hydrophilic groups, ie, cation exchangeable groups, present in the synthetic fiber and the surface texture or structure of the fiber. Furthermore,
This synthetic fiber must have a concentration of cation exchange groups within the above range in order to chemically bond the antibacterial basic nitrogen-containing compound by ion exchange.

Even if fibers that do not have cation exchange groups are treated with antibacterial basic nitrogen-containing compounds, this compound will of course be adsorbed and retained on the fibers, but with ordinary fibers, this adsorption and retention amount itself is small, and the treatment Even if the subsequent weave exhibits antibacterial properties, its effectiveness will be lost within a relatively short period of time. According to the present invention, it is possible to fix the basic nitrogen-containing compound in the fiber at a high concentration by treating the fiber having the above-mentioned concentration of cation-exchangeable groups with the antibacterial basic nitrogen-containing compound. Moreover, the basic nitrogen-containing compound fixed to the fiber has a sustained release property, that is, it is released from the fiber very gradually, and permanent antibacterial properties can be obtained. As described above, the synthetic fibers used in the present invention have a great property of adsorbing and retaining dust-adsorbing liquids such as water or oil, and even in a state where they are constantly impregnated with these dust-adsorbing liquids.
A notable feature is the very gradual release of antibacterial basic nitrogen compounds, and it is also important that the product retains its antibacterial properties even when subjected to repeated harsh washing. It is a characteristic.

Furthermore, in the present invention, immobilizing the antibacterial basic nitrogen compound on the fiber matrix by ionic bond brings about significant advantages in terms of dust adsorption and dust retention.

That is, these antibacterial basic nitrogen compounds are fixed to the fiber matrix in the form of cations. On the other hand, it is generally recognized that dust and dirt adhere to the wiped surface in a negatively charged state. The reason why the dust control fiber product of the present invention exhibits excellent dust adsorption and retention properties is thought to be because the cations fixed on the fibers act to electrostatically adsorb dust, dirt, etc. The cation-exchangeable synthetic fiber used in the present invention is obtained by grafting an ethylenically unsaturated monomer having a cationic exchange group such as a carboxylic acid group, a sulfonic acid group, or a phosphoric acid group to a high molecular weight polymer constituting the synthetic fiber. It is produced by a method of polymerization, or a method of polymer blending a polymer having these cationic exchange groups with a synthetic fiber-constituting polymer.

The main polymers constituting the synthetic fibers include polyamides such as nylon 6 and nylon 6,6; polyethylene;
Polyesters such as terephthalate and polyethylene terephthalate/isophthalate: acrylic polymers such as polyacrylonitrile, polypynyl alcohol, polypynyl chloride, polypropylene, and the like. Monomers used to introduce cation exchange groups by graft polymerization include, for example, acrylic acid, methacrylic acid, crotonic acid,
Ethylenically unsaturated carboxylic acids or their anhydrides such as fumaric acid, maleic anhydride, itaconic anhydride, and tetrahydrophthalic acid, and ethylenically unsaturated sulfonic acids such as styrene sulfonic acid are used.

Graft polymerization of these monomers to the fiber-constituting polymer is
Polymerization active centers are formed in the polymer by means known per se, for example ionizing radiation irradiation, ultraviolet irradiation, ozone oxidation or the action of initiators such as peroxides or azo compounds, in which the monomers are added. This is generally done by graft polymerizing the body.

In addition, instead of graft polymerization, polymers having the above-mentioned cation exchange groups, such as thermoplastic polymers containing carboxyl acid or acid anhydride groups, thermoplastic polymers containing sulfonic acid groups, thermoplastic polymers containing phosphoric acid groups, etc. The plastic polymer is polymer blended with the synthetic fiber mass and the blend is made into fibers by melt grade, dry spinning or wet spinning methods known per se.

Incidentally, instead of blending the cation-exchangeable thermokeyable resin, a sulfonic acid type or carboxylic acid type ion exchange resin, which is known per se, is blended in the form of a fine powder with the synthetic fiber forming polymer. The fibers may be prevented by the means described above. Furthermore, instead of blending polymers with direct cation exchange groups, fibers are produced by blending polymers with aromatic rings, such as styrene-divinylbenzene copolymer, and this fiber is mixed with cross-sulfonic acid. It is also possible to sulfonate the aromatic ring by reacting with , thereby introducing a cation-exchangeable group.

In addition, fibers made by blending copolymers of acrylic esters and methacrylic esters are treated in a conventional manner.
The ester can also be hydrolyzed to produce a synthetic fiber into which carboxylic acid groups have been introduced. Furthermore, in the case of acrylic fibers, carboxyl groups can also be introduced by hydrolyzing a portion of the pendant nitrile groups with acid.

Regardless of any of these methods, in the present invention, the synthetic fiber matrix has a content of 0.1 meq/ta or more, particularly 0.5 to ah
A cation exchange group is added so as to have a cation exchange ability of eq/y.

The water retention capacity of synthetic fiber matrices, as already pointed out, depends on both the concentration of cation exchange groups and the fiber morphology. In order to increase the water retention property, it is effective to crimp the synthetic fibers, and it is also effective to make the cross section of the fibers irregular to increase the surface area per unit weave. Furthermore, by adding a certain additive substance to the dope and removing this additive substance from the paper yarn or from the yarn after the paper yarn, pores are formed inside the fiber and the water retention property is improved. can be increased. However, when the cation exchange capacity is 2 heq/ta or more, special measures for increasing water retention are generally not required. A cation-exchangeable fiber particularly suitable for the purposes of the present invention is a carboxyl group-containing nylon fiber, commercially available from Toray Industries, Inc. under the trade name Scot. This cation-exchangeable synthetic fiber can be used to form a fiber matrix for dust control in the form of so-called staple fibers or filaments; for example, it can be made into a mop pile by spinning, twisting, etc., and it can be made into a wiping cloth by weaving or knitting or forming a non-woven fabric. It is made into a dusting mat by tufting or electrostatic flocking on the base fabric.

In any of these cases, it is desirable that the synthetic fiber be crimped. In the present invention, cation-exchangeable synthetic fibers and ordinary fibers that do not have cation-exchangeability are
80:20 to 10:9 especially 70:30 to 20:8
It is particularly desirable to mix and use them at a weight ratio of 0.

Cation exchange synthetic fibers have excellent retention and sustained release properties for antibacterial agents and retention properties for dust adsorption liquids, but on the other hand, they have a slimy or slippery feel when wet, and lack texture and texture.
It also has the disadvantage of being slippery when used as a cloth, cloth, etc. According to the present invention, the texture of a dust control product is improved and the slipperiness is improved by containing ordinary fibers in an amount of 2% by weight or more, particularly 5% by weight, with respect to cation-exchangeable synthetic fibers. It can be resolved. In order to prevent the growth of microorganisms on dust and dirt attached to dust control products and to improve dust adsorption properties, cation exchangeable fibers should be used in an amount of 1% by weight or more, especially 2% by weight.
It is desirable that the amount of the compound be present in an amount of at least 20% by weight. According to the present invention, a basic nitrogen compound having antibacterial properties is fixed to a cation-exchangeable synthetic fiber by ion exchange. This fixation treatment is carried out by coating or impregnating a dust control fiber substrate containing the synthetic fibers with an aqueous solution of the basic nitrogen compound to fix the nitrogen compounds onto the synthetic fibers by ionic bonding. In this exchange, it is generally desirable to use the cation exchange group as an alkali metal salt and the organic base as an acid addition salt. As an aqueous solution, add a basic nitrogen compound from 0.01 to 10 times/day.
Those containing the same concentration are preferably used, and the temperature at the time of contact is suitably in the range of 20 to 90 qo. The treated fibrous substrate is dehydrated by means such as centrifugal dehydration, if necessary, and dried preferably at a temperature of 60 to 80 qo. Instead of fixing a basic nitrogen compound on the fiber substrate for dust control such as mops and cloths, it is also possible to fix the compound on the synthetic fiber material before processing and then post-process it. be. Basic nitrogen compounds with antibacterial properties include quaternary ammonium salts such as bersalkonium chloride, cetyltrimethylammonium bromide, cetylpyridinium chloride, and laurylpyridinium chloride; bis-(p-chlorophenyldiguanide)-hexane; , Nidine derivatives; glycine-type amphoteric activators such as the last chain alkyl di(aminoethyl)glycine, and the like.

These antibacterial basic nitrogen compounds can be used alone or in combination of two or more, and can be used in amounts of 0.1 part by weight or more, especially 1 part by weight or more per 10 parts by weight of cation-exchangeable synthetic fibers, up to the saturated adsorption amount. The amount is fixed by adsorption.

．． The dust control product of the present invention is preferably used impregnated with 1 to 5% by weight, particularly 5 to 4% by weight, of a dust-adsorbing liquid based on the total fiber matrix.

If the amount of the dust adsorption liquid is less than this range, the desired dust construction and dust retention properties cannot be obtained, and if it is more than this range, the dust adsorption liquid may migrate to the wiped surface or the dust control fibers may This is not preferable because it gives the substrate a strong wet feeling. As the liquid for dust adsorption, normally non-volatile oils such as spindle oil, machine oil, liquid paraffin, mineral oil such as electrical insulation oil, alkylbenzene oil, diolefin oil, gestal oil, alkylnaphthenate oil, etc. are used effectively. The oil solution can be blended with fragrances, dyes, disaster prevention agents, surfactants, etc. according to methods known per se.

As the dust adsorption liquid, an aqueous liquid can also be used, and a suitable example of such an aqueous dust adsorbent is
This is disclosed in Japanese Patent Publication No. 54-33665 or Japanese Patent Publication No. 54-33666 proposed by the present applicant.

As the aqueous dust adsorbent, of course, water itself can be used, and an alcohol aqueous solution and the like can also be used. These dust adsorption liquids can be applied by any means known per se, such as roller coating, immersion, and spray coating.

The antibacterial basic nitrogen compound fixing treatment and the dust adsorption liquid impregnation treatment can be performed separately or simultaneously.

For example, in the case of an aqueous dust-adsorbing liquid, by dissolving a basic nitrogen compound in the liquid, it can be adsorbed and fixed onto the cation-exchangeable synthetic fibers. In addition, in the case of an oil-based dust adsorption liquid, this oil agent is floated and separated in water to prepare an oil-in-water emulsion, and a basic nitrogen compound is dissolved in this aqueous soot to perform ion exchange. fixation of basic nitrogen compounds and adsorption of emulsion oil. According to the present invention, a very significant advantage is achieved compared to conventional products that simply incorporate an antibacterial agent into the dust-adsorbing liquid, since the antibacterial agent is immobilized in the fibers by ionic bonds. .

That is, conventional products have the disadvantage that, even if they initially have antibacterial properties, their effectiveness is almost completely diminished after washing or regeneration. In contrast, according to the present invention, even when used dust control products are collected, washed, and this recycling operation is repeated, dust attached to fibers and microorganisms in dirt can be removed. Growth is effectively prevented and excellent hygienic properties are obtained. Furthermore, this fiber matrix for dust control has a high water retention property that is not found in ordinary synthetic fibers, and as is clear from this, it has excellent ability to retain liquid for dust adsorption. Since there is also an electrostatic adsorption effect on dust by nitrogen cations, it has remarkable dust adsorption and retention properties, and also has the advantage of not transferring the liquid to the wiped surface. The invention is illustrated by the following example.

Example 1 A cation-exchangeable rolled nylon fiber (trade name Scott, manufactured by Toray Industries, Inc.) having a cation exchange capacity of about 1.8 mm quivalent/weight and a water retention capacity of about 40% by weight, and the cation-exchangeable rolled nylon fiber (trade name Scott, manufactured by Toray Industries, Ltd.) A wiping cloth made of a plain woven fabric was manufactured by a conventional method using a 50/50 blend of nylon fiber and cotton.

For comparison, wiping cloths made of plain woven fabrics of normally crimped nylon fibers, cotton fibers, polyester fibers, and acrylic fibers were also prepared.

Penzalkonium chloride 0.113% (113 Cape pm)
Prepare an aqueous solution containing each wiping cloth at a concentration of 5 to 100 cc and 70q0 to 2
Soaked for a minute.

The concentration of penzalkonium chloride in the aqueous solution after soaking was measured by the orange colorimetric method, and the results are shown in Table 1 below. Table 1 According to the results shown in Table 1 above, it was found that the selective adsorption of pensalkonium chloride was significantly greater in the wiping cloth containing cation-exchangeable synthetic fibers.

Squeeze the wiping cloth after treatment to a squeezing ratio of 70%,
The cloth was dried for 60 minutes at a temperature of 0.000 C to obtain a wiping cloth product that retains an aqueous dust adsorbent.

Wiping cloths made of cation-exchangeable wrapped striped nylon fibers or blended fibers of nylon and cotton treated with penzalkonium chloride were moistened with water and wiped off a dirty office desk. Compared to untreated wiping cloths and wiping cloths made of ordinary rolled vertical nylon fibers, it was recognized that dirt was transferred to a pitch black level, indicating that the cloth had significantly better dust adsorption properties.

Furthermore, the wiping cloth made of the above-mentioned blended fibers did not have a slippery or slimy feel, and had a significantly excellent texture.

Example 2 Among the wiping cloths of Example 1, wiping cloths treated with penzalkonium chloride and untreated wiping cloths were soaked in water, and then put into a centrifugal dehydrator for 50 min. Centrifuge for 3 minutes at
A water-based wiping cloth was used and the dust test described below was conducted.

That is, each wiping cloth sample was placed in a bottle, and silica sand fine powder twice the amount of the sample and 5 rubber balls were added.
Perform prayer for one minute. Next, the sample was taken out on a wire mesh and 10
Leave for a minute. Shake the hair 100 times using a dust tester and weigh it. The dust ratio (D) is calculated as the average value of three samples for each sample using the following formula. D: WD Priest + FWF) X・oo In the formula, WD is the weight after the dust test, Ww is the moisture content after the dust test, and WF is the weight of the dry base fabric.

The results obtained are shown in Table 2 below.

Table 2 The results shown in Table 2 above show that the dust adsorption rate is significantly improved by introducing and fixing organic cations.

Example 3 (A) Penzalkonium chloride 1/2, (B) Hibitengluconate 10/2, and (C) Procal IB
Prepare IO/each aqueous solution, and add 700% to this aqueous solution.
Wiping cloths made of cation-exchangeable crimped nylon fibers (Scott), regular nylon fibers, and cotton knitted fabrics were soaked at a temperature of 0 for 2 minutes.

Thereafter, it was squeezed at a squeezing rate of 70% and dried at 80° C. for 60 minutes. These wiping cloths were washed repeatedly in a washing solution consisting of 3 washes of powdered industrial detergent at 50°C for 20 minutes using a household washing machine, and the antibacterial and antifungal properties were evaluated for each wash. The inside of the inhibition zone and the antifungal power were measured according to the JIS method.

The results obtained are shown in Table 3 below. Table 3 The results shown in Table 3 above show that the dust control product of the present invention is effective in cleaning. It is clear that the antibacterial and antifungal properties are maintained even after repeated regeneration, making it particularly excellent as a rental dust control product.

Claims (1)

[Scope of Claims] 1. A basic nitrogen-containing compound having antibacterial properties in a fiber matrix for dust control containing synthetic fibers having a cation exchange capacity of at least 0.1 meq/g or more and a water retention capacity of 300 to 600% by weight. A dust control product characterized in that the amount of is fixed in an amount of 0.1 to 10% by weight per synthetic fiber. 2. The dust control product according to claim 1, wherein the dust control fiber substrate contains the cation-exchangeable synthetic fibers and the normal fibers that do not have cation-exchangeability in a weight ratio of 80:20 to 10:90. .