JPH07102480A - Processed textile fiber and its production - Google Patents

Abstract

PURPOSE:To provide processed textile fibers imparted with humectancy and holding excellent in softness and washing resistance. CONSTITUTION:The processed textile fibers are surface-treated with both cationic and anionic surfactants with the surface-treated parts being in a hard-to- dissolve state and containing a humectant. The processed textile fibers can be obtained by treating the original fibers with a cationic surfactant dispersion followed by drying and by treating the resultant fibers with an anionic surfactant dispersion followed by drying. In the above treatments, either of both the dispersions is incorporated with a humectant.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a processed fiber and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, moisturizers such as squalene and glycerin have been added to fibers.
A method of adhering with a binder such as a silicone resin is known (JP-A-2-300301). According to this method, moisturizing properties can be imparted to the fibers, and thus clothing using the treated fibers has an advantage of being able to protect the skin from drying and prevent rough skin.

[0003]

However, according to this method, since the binder as described above is used,
The fiber treated with the binder generally has a problem that it is inferior in flexibility and washing resistance. It is an object of the present invention to provide a novel processed fiber which has moisturizing properties and is less likely to cause the above problems, and a method for producing the same.

[0004]

[Means for Solving the Problems] The inventors of the present invention have made various studies to achieve the above-mentioned object, and arrived at the present invention.
That is, the processed fiber of the present invention is characterized in that the fiber is surface-treated with a cationic surfactant and an anionic surfactant, and the treated surface portion contains a moisturizer in a poorly soluble state. To do. Further, the method for producing a processed fiber of the present invention performs treatment of a fiber with a cationic surfactant dispersion and drying after the treatment, and treatment with an anionic surfactant dispersion and drying after the treatment, A moisturizing agent is contained in one of the two liquids during the treatment.

The present invention will be described in detail below. First, the processed fiber of the present invention will be described. Examples of the fiber include natural fibers such as cotton, silk and wool, and synthetic fibers such as nylon and polyester. These fibers may be spun yarns, woven fabrics, non-woven fabrics, or the like, and further processed into clothing such as lingerie, underwear, brassieres, body suits, socks, or the like. The processed fiber of the present invention is surface-treated with a cationic surfactant and an anionic surfactant. Since the cationic and anionic surfactants react with each other to form an insoluble substance, it is difficult for the surfactants to leach into water or organic solvent on the surface of the fiber as a result of being treated with both substances. Will be things. Here, the surface treatment means that the surface portion is treated with these.

Examples of cationic surfactants include alkylamine acetate salts, alkylammonium salts, higher fatty acid amides and their acetates, and more specifically, octadecylamine acetate salts, octadecyltrimethylammonium chloride, stearic acid. Examples include diethylene triamide.

As the anionic surfactant, higher alcohol sulfate ester salt, higher alcohol phosphate ester salt, alkylbenzene sulfonate, alkylmethyl taurate phosphate, alkylnaphthalene sulfonate,
Examples thereof include dialkyl sulfosuccinate. As the kind of salt, sodium salt is generally used.

Specific examples of moisturizers include mucopolysaccharides (hyaluronic acid, chondroitin sulfate, heparan sulfate, salts thereof such as sodium salt), chitosan, seaweed extract, collagen, derivatives thereof, etc. Can be given. By including this moisturizing agent, the fiber enhances the moisturizing property and prevents rough skin. Moisturizers often have a slimy feeling and tend to be poor in soft feeling, but when collagen is a moisturizer, it is almost non-existent, and other than collagen, for example, mucopolysaccharide, chitosan, seaweed extract, etc. When collagen is used in combination with a moisturizer, the texture becomes warm and soft and soft, and it is more preferable as a fiber, which is closer to the ideal. When a moisturizing agent such as mucopolysaccharide / chitosan other than collagen is used in combination with collagen, the ratio of the former to the latter is preferably about 0.2 to 5.0 parts of the latter to 1 part of the former, and more preferably Is about 0.5 to 1.5 parts for the latter with respect to 1 part for the former.

Further, the ratio of the cationic surfactant, the anionic surfactant fixed to the fiber by the surface treatment, and the moisturizing agent contained in the treated surface portion of the fiber is large relative to the weight of the fiber, Preferably 0.1 to 6%,
It is 0.1 to 6% and 0.05 to 4%. If the amount is too small, the effect will be poor, and if the amount is too large, no further effect can be expected. More preferably, respectively,
It is 0.2-3%, 0.2-3%, 0.1-2%.

Further, the processed fiber of the present invention contains a moisturizer in a poorly soluble state on the surface of the fiber treated with the cationic surfactant and the anionic surfactant. Whether or not it is insoluble is determined by washing with water 30 times.
Even if the moisturizing property is lowered, it can be confirmed by whether or not the value of the measurement result is about 90 or more in the measurement of the skin water content described later.

In the processed fiber of the present invention, the surface-treated portion may contain any raw materials and components as long as the object of the present invention is not impaired. Examples of the raw materials / components include cationic surfactants, anionic surfactants, and nonionic surfactants that may be used when the moisturizer is difficult to dissolve in water.

Next, the method for producing the processed fiber of the present invention will be described. In the method for producing the processed fiber of the present invention, the fiber is treated with the cationic surfactant dispersion and dried after the treatment, and treated with the anionic surfactant dispersion and dried after the treatment. The cationic surfactant dispersion liquid means a liquid in which a cationic surfactant is dispersed in water. The concentration of the cationic surfactant in the dispersion is usually about 0.1 to 1.0%. If the concentration of the cationic surfactant is too low, the effects of the present invention are less likely to occur,
Moreover, even if it is too high, it is difficult to produce further effects. More preferably, it is about 0.2 to 0.7%.

Cationic surfactants are usually well dissolved / dispersed in water, but if they are difficult to be dissolved / dispersed in water as they are, they may be dissolved / dispersed by appropriately using a solubilizing agent. For example, higher fatty acid amides and the like are preferably treated with acetic acid, hydrochloric acid or the like in advance to convert them into a form such as acetate which is easily dissolved in water, and then dissolved / dispersed in water. This point is the same as in the case of an anionic surfactant or a moisturizer. When the cationic surfactant is oily and therefore difficult to disperse in water, a nonionic (nonionic) surfactant such as a higher alcohol ethylene oxide condensate or a sorbitan fatty acid ester is used as a dissolution aid. Ethylene oxide condensate of fatty acid, more specifically, an aqueous solution of polyoxyethylene stearyl ether, polyoxyethylene nonylphenyl ether, polyoxyethylene sorbitan monolaurate, sorbitan monostearate, polyoxyethylene monostearate, etc. is used. , After dispersing the cationic surfactant in the aqueous solution in advance,
It may be mixed with the remaining water to form an aqueous dispersion. In that case,
The ratio of the cationic surfactant to the nonionic surfactant is usually sufficient such that the latter is 0.01 to 1 part with respect to 1 part of the former. Incidentally, even if the anionic surfactant or humectant described later is oily and difficult to disperse in water, it is treated in accordance with the case where the cationic surfactant is oily and difficult to disperse in water, and is dispersed in water. Just figure it out. Examples of moisturizers that are difficult to dissolve in water include oily ones such as lanolin, beeswax, and fatty acid esters of sugar, and non-oily ones such as chitosan. In the case of chitosan, an organic acid or an inorganic acid may be used as a dissolution aid.

The treatment of the fiber with the cationic surfactant dispersion means bringing the fiber into contact with the cationic surfactant dispersion, which is usually carried out by immersing the fiber in the surfactant dispersion. . The immersion time is usually a few seconds, because it is sufficient for the dispersion to spread over the fibers.
For example, 3 to 10 seconds is sufficient. After soaking, the fibers are dehydrated. Dehydration is usually performed at a squeezing ratio of 50 to 200%, more preferably 80 to 100%. Here, the drawing rate indicates the following value (%). Squeeze ratio = [(fiber weight after dehydration-dry [before treatment] fiber weight) / dry [before treatment] fiber weight] x 100 Although any dehydration method is possible, centrifugal dehydration or mangle dehydration is convenient for use. Is. After the treatment with the cationic surfactant dispersion as described above, the fiber is dried. Upon drying, the cationic surfactant is fixed on the surface of the fiber. The conditions for drying are not limited, but heat treatment may usually be performed at a temperature of 80 to 180 ° C. for about 20 seconds to 60 minutes. Heating accelerates drying and fixing. More preferably 95 to 17
It is about 1 to 40 minutes at 0 ° C.

According to the production method of the present invention, the fiber is further treated with the anionic surfactant dispersion liquid and dried after the treatment. The anionic surfactant dispersion liquid refers to a liquid in which an anionic surfactant is dispersed in water. The concentration of the anionic surfactant dispersed in water is not limited, but is usually about 0.1 to 1.0%. This is because if the concentration of the anionic surfactant is too low, the effect of the present invention is less likely to occur, and if it is too high, further effect is less likely to occur. More preferably 0.2 to 0.7
%. The treatment of the fiber with the anionic surfactant dispersion liquid means to bring the fiber into contact with the anionic surfactant dispersion liquid, which is usually performed by immersing the fiber in the dispersion liquid. The immersion time and the drying after the immersion may be performed according to the treatment with the cationic surfactant dispersion liquid.

As a result of the fibers being treated with the cationic surfactant dispersion liquid and the anionic surfactant dispersion liquid, both surfactants react with each other on the surface of the fibers and become insoluble. It is fixed on the surface and does not easily leach from the fiber. In the method for producing a processed fiber of the present invention, a humectant is added to either of the two liquids when the fiber is treated with the cationic surfactant dispersion and the fiber is treated with the anionic surfactant dispersion. Is characterized by. Since the moisturizer is contained in one of the two liquids, the fiber is treated with a cationic surfactant and an anionic surfactant, and both surfactants are hardly soluble on the surface of the fiber. Since the moisturizing agent is sandwiched between the two surface active agents when it becomes a substance, the moisturizing agent becomes difficult to be leached from the surface of the fiber by water or an organic solvent.

Either the treatment of the fiber with the cationic surfactant dispersion or the treatment of the anionic surfactant dispersion may be performed first.
Usually, the treatment with a cationic surfactant dispersion liquid containing no moisturizer is performed first, and then the treatment with an anionic surfactant dispersion liquid containing a moisturizer.

When drying after the treatment with the surfactant dispersion liquid, which is the final treatment, whether the dispersion liquid is a cationic surfactant dispersion liquid or an anionic surfactant dispersion liquid is dried. The preliminary drying in the former stage and the finishing drying in the latter stage are divided, and the finishing drying is performed at a higher temperature than the preliminary drying, and it is particularly preferable to make the fiber quality required for the synthetic fiber constant.

The humectant is contained in either the cationic surfactant dispersion liquid or the anionic surfactant dispersion liquid, but as one embodiment, it may be contained separately in both liquids.

[0020]

[Action] Although the mechanism / action (mechanism) is not clear, the fiber is treated with the cationic surfactant and the anionic surfactant, so that the anionic surfactant is strong with the above cationic surfactant. It is presumed that if a moisturizer coexists during binding, it will be sandwiched between both surfactants and will not easily fall off from the fibers even after washing. Mucopolysaccharides and chitosan have excellent moisturizing properties, and when collagen is used in combination with them, they have a soft and soft feeling and a warm texture, but the mechanism in this case is uncertain.

[0021]

EXAMPLES Examples of the present invention will be described below. In the present invention, all percentages and percentages are weight percentages and weight percentages. Example 1 The following cotton fibers were dipped in a cationic surfactant dispersion having the following formulation for 3 seconds and then dehydrated at a squeezing ratio of 96%, and then 1
It was dried by heating at 00 ° C. for 3 minutes. Then, after immersing in an anionic surfactant dispersion liquid of the following formulation for 3 seconds, dehydration was performed at a squeezing ratio of 96%, heating at 100 ° C. for 3 minutes for preliminary drying, and further heating at 160 ° C. for 2 minutes. Finishing was dried to produce a processed fiber made of cotton.
(The content ratios of the cationic surfactant, the anionic surfactant and the moisturizing agent to the weight of the fiber before the treatment are about 0.5%, about 0.5% and about 0.5%, respectively, in the outer ratio.
Met. ) I. Cotton fiber: Made by using a circular knitting machine to make a knitted fabric using mercerized cotton yarn of 60th count twin yarn, and scouring and bleaching it in the usual manner. (Specifically, stearic acid diethyltriamide was used as the higher fatty acid amide.) C. Anionic surfactant dispersion: Type of raw material Mixing ratio (%) Sodium dialkylsulfosuccinate 0.5 Sodium hyaluronate 0.5 Fresh water Total remaining amount 100 (%)

Example 2 A processed cotton fiber was produced according to the method of Example 1 except that the anionic surfactant dispersion was compounded as follows. (The content ratio of the cationic surfactant, the anionic surfactant and the humectant with respect to the weight of the fiber before the treatment is
It was about 0.5%, about 0.5% and about 1.0%, respectively, in the extrapolation. ) Anionic surfactant dispersion: Kind of raw material Mixing ratio (%) Dialkylsulfosuccinic acid 0.5 Sodium hyaluronate 0.5 Collagen 0.5 Fresh water Total remaining amount 100 (%)

Example 3 A processed polyester fiber was produced according to the method of Example 1 except that the following polyester fiber was used as the fiber.
(The content ratios of the cationic surfactant, the anionic surfactant and the moisturizing agent to the weight of the fiber before the treatment are about 0.5%, about 0.5% and about 0.5%, respectively, in the outer ratio.
Met. ) Polyester fiber: A polyester fiber prepared by using a polyester filament yarn of 75 denier and refined in the usual manner.

Example 4 A processed nylon fiber was produced according to the method of Example 1 except that the following nylon fiber was used. Nylon fiber: Nylon fiber made from 70 denier nylon filament yarn and scoured as usual.

Example 5 A processed fiber was produced under the same conditions as in Example 1 except that the treatment with the anionic surfactant dispersion liquid was performed first and the treatment with the cationic surfactant dispersion liquid was then performed.

Test Example Test Method: In Example 1, various moisturizers were used, and as shown in Table 1, eight types of processed fibers corresponding to the present invention were produced. Further, a moisturizer, a cationic surfactant or an anionic surfactant was not used in part, and other treatments were carried out in accordance with Example 1 to produce four types of processed fibers as comparative products. When chitosan was used as a moisturizer, approximately the same weight of acetic acid as that of chitosan was used as a dissolution aid, and an anionic surfactant dispersion liquid was prepared. 30 for each processed fiber
Washing was performed twice, and the texture (softness and warmth) and the moisturizing property (skin moisture content) were measured before entering the washing and after the 30th washing. Test results: The results are shown in Table 1. From the table, it can be seen that the processed fiber obtained by subjecting the fiber to drying after the treatment with the cationic surfactant dispersion, treatment with the anionic surfactant containing a moisturizer and subsequent drying has durability against washing. It can be understood that, when used in combination with collagen and mucopolysaccharide or chitosan as a moisturizing agent, the moisturizing ability is not impaired and the processed fiber has an excellent texture. Further, it is clear that the processed fiber according to the present invention is highly flexible in terms of texture.

The method of washing, the method of measuring skin water content,
The method for calculating the rate of increase in water content and the test method for texture are as follows. I. Washing method Each sample was washed by the 103 method described in JIS L-0217 (however, the washing time was 15 minutes). The number of washings was 30 times. B. Measurement of skin water content 5 female panelists 20 to 40 years old at 20 ° C, humidity 60%
Each sample (processed fiber) inside the upper arm
3 hours after wrapping, the water content of the skin at the same site was measured by a skin stratum corneum water content measuring device (Frage Kazaka Co.
Corneometer-CM-820), and the average value was calculated. For comparison, the skin water content before wrapping each sample was also measured. The rate of increase in water content was calculated by the following equation. Moisture increase rate (%) = [(water content after 3 hours of sample winding-water content before winding) / water content before winding] x 100 c. Measurement method of texture (1) Soft feeling Each sample was evaluated by 5 panelists according to the following criteria, and the results are shown as an average value. 1: Very soft 2: Soft 3: No change 4: Slightly hard 5: Hard (2) Warm feeling Five panelists evaluated the warm feeling (warm and warm feeling) of each sample according to the following criteria, The results are shown as an average value. 1: There is a very warm feeling 2: There is a warm feeling 3: There is a slightly warm feeling 4: It does not change 5: There is a slightly cold feeling 6: There is a cold feeling

[0028]

[Table 1] In the table, ◯, Δ, and x respectively indicate the following. I. Regarding texture ○: The texture is considerably excellent Δ: The texture is slightly excellent ×: The texture is not so excellent b. Moisture retention ◎: Quite excellent ○: Excellent Δ: A little excellent ×: Not good (not good)

[0029]

INDUSTRIAL APPLICABILITY As described above, the present invention provides a processed fiber which is excellent in durability during washing and the like, retains flexibility, and has good moisture retention. In addition, mucopolysaccharide
When collagen is used in combination with a moisturizer other than collagen, such as chitosan, a processed fiber with a warm texture is provided. Further, according to the method for producing a processed fiber of the present invention, the processed fiber having the above properties is preferably produced.

Claims (6)

[Claims] 1. A processed fiber, wherein the fiber is surface-treated with a cationic surfactant and an anionic surfactant, and the treated surface portion contains a moisturizer in a poorly soluble state. 2. The processed fiber according to claim 1, wherein the humectant is at least one of mucopolysaccharide, collagen, chitosan, and seaweed extract. 3. The processed fiber according to claim 1, wherein the moisturizing agent is a combination of collagen and any one or more of mucopolysaccharide, chitosan and seaweed extract. 4. A fiber is subjected to a treatment with a cationic surfactant dispersion, drying after the treatment, and treatment with an anionic surfactant dispersion and drying after the treatment,
A method for producing a processed fiber, wherein a moisturizing agent is included in either of the two liquids during the treatment. 5. The method for producing a processed fiber according to claim 4, wherein the moisturizing agent is any one or more of mucopolysaccharide, collagen, chitosan, and seaweed extract. 6. The method for producing a processed fiber according to claim 4, wherein the moisturizing agent is a combination of collagen and any one or more of mucopolysaccharide, chitosan and seaweed extract.