JPH0726466A - Cloth made from hollow fibers, the production thereof and cloth made from hollow fibers having chemical functions - Google Patents

Abstract

PURPOSE:To obtain cloth made of hollow fibers communicating grooves passing through from the fiber surface to the hollow part using no polymers different in solubility and cloth where agents giving the fibers functions are introduced into the hollow part. CONSTITUTION:Cloth containing hollow fibers which are made of a single polymer and have at least 25% hollowness is treated with a solvent or solution dissolving said polymer to cause partial peeling at low orientation regions along the jointing parts S1 to S4 of the polymer of the skin whereby microgrooves G1 to G4 passing through to the hollow part are formed so that they extend in the longitudinal direction of the fibers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fabric having a novel structure composed of hollow fibers, a method for producing the fabric, and a fabric having a fiber function-imparting agent introduced into the hollow portion of the hollow fiber in the fabric having the novel structure.

[0002]

2. Description of the Related Art Many proposals have been made so far for hollow fibers having a communicating groove that penetrates from the fiber surface to the hollow portion. For example, Japanese Patent Application Laid-Open No. 56-169817 discloses that core-sheath type composite fibers coated with nylon and polyester are treated with a solvent for nylon.

Further, Japanese Patent Publication No. 60-37203 discloses that the above-mentioned composite fiber is given a twisting force to form a crack.

Further, JP-A-5-44160 discloses that the core component in the above-mentioned composite fiber is partially exposed and the core component is dissolved and removed.

However, all of the above proposals use a core-sheath type fiber having different alkali weight loss rates as the polymer of the sheath portion and the core portion, which requires an extremely complicated step in the spinning technique called composite spinning. Have to go through. Moreover, these methods inevitably cause problems that the core polymer cannot be completely removed and the removal rate varies. Therefore, in terms of high quality products, problems such as uneven dyeing, deterioration of physical properties of the hollow fiber itself, and abrasion resistance become problems, and product development is limited.

[0006]

DISCLOSURE OF THE INVENTION An object of the present invention is a disadvantage caused by using polymers having different solubilities as in the prior art, namely, (a) the spinning process is complicated and the cost is high. Problem. (B) Complete removal of the core is not guaranteed, and problems such as stains and deterioration of the quality of the remaining core due to the polymer. (C) The problem of deterioration of physical properties of the hollow fiber. To overcome such problems.

Still another object of the present invention is to provide a fabric in which hollow fibers are provided with desired functionality.

[0008]

According to the research conducted by the present inventors, in a hollow fiber spun through a hollow spinneret composed of a plurality of slits, a discharge polymer is bonded between adjacent slit ends. The portion exhibits extremely low orientation, and when the hollow fiber hollow ratio is 25% or more, this binding portion is predominantly peeled off by the solvent or solution of the polymer, and as a result, the physical properties of the fiber as a whole are deteriorated. The fact that there was no concern about the fact that it had never been known was investigated.

Thus, according to the invention, in a fabric comprising hollow fibers composed of a single polymer and having a high hollowness of at least 25%, in the longitudinal direction of the hollow fibers along the polymer joint, the A fabric composed of hollow fibers, characterized in that microgrooves as polymer removal marks are present in a state of communicating with the hollow portion, a fabric composed of a single polymer and containing hollow fibers having a high hollow ratio of at least 25%. Is treated with a solvent or solution that dissolves the polymer to partially peel off the low-orientation portion along the polymer joint of the hollow fiber, and a single polymer In a fabric containing hollow fibers having a high hollowness of at least 25%, the polymer along the polymer joint in the longitudinal direction of the hollow fibers. Present in a state in which the microgrooves of the removal marks were communicated with the hollow portion, the fabric, characterized in that and middle in the sky portion to fiber function imparting agent is present is provided.

The present invention will be described below with reference to the accompanying drawings. Hollow fiber, (here, take a hollow fiber with a round cross section as an example)
Is a plurality of slits S ′ _{1 to} S ′ ₄ as shown in FIG.
It is obtained by using a spinneret consisting of the assembly of That is, although there is a slight gap C (called a canal) between the ends of the adjacent slits, the polymer discharged from each slit is joined by the disparity effect at this portion to form a hollow fiber. Here, the above-mentioned joining portion is continuous along the fiber axis direction.

FIG. 1 shows a cross section of a hollow fiber polyester filament yarn woven fabric after the alkali treatment.

[0012] In FIG 1, S ₁ to S ₄ are thin skin portion of the hollow fiber, G ₁ ~G ₄ shows the microgrooves, the junction (Fig of each polymer of the portion originally S _'1 ~S' ₄ parts 3 was formed by peeling by alkali treatment (corresponding to each C part in 3) (note that FIG. 1 is a 3300 times electron microscope photograph, and FIG. 2 is a 500 times electron microscope photograph traced. Is).

In addition, in the vicinity of the peeled portion, an incidental group may occur in addition to a single microgroove as shown in the figure.

FIG. 2 is a side view, and it can be seen that the microgrooves are intermittently formed along the joint portion extending in the fiber axis direction.

The polymer used in the present invention may be any thermoplastic polymer capable of producing a fiber having a high hollow ratio and capable of being dissolved in a solvent or a solution after being formed into a fiber, and polyester and polyamide can be preferably exemplified.

In order to obtain additional value, the following well-known polyesters are also preferably used. Polyester to which polyoxyethylene-based polyether and organic sulfonate compound are added Polyester to which phosphonium salt of 5-sulfoisophthalic acid, alkali metal salt, etc. are copolymerized Polyester to which phosphorus compound which is a micropore forming agent is added Inorganic fine particles Polyester with titanium oxide, zinc oxide, etc. added (particle size 0.02 to 1 μm)

Further, a modifier, an antioxidant, a flame retardant, an antistatic agent, a fine pore forming agent, a coloring agent, a stabilizer, an inorganic fine particle and the like are added to the above-mentioned polymer within the range not impairing the object of the present invention. You may.

Such a polymer must be melt-spun by a conventional method to form hollow fibers having a high hollow ratio of at least 25%. When the hollow ratio is less than 25%,
Peeling due to partial dissolution of the low-orientation portion along the polymer joint portion is less likely to occur, and the target hollow fiber cannot be obtained. The upper limit of the hollow ratio is appropriately set to about 70% at the maximum in order to secure the physical properties of the fiber. And the preferable range of this hollow ratio is 30 to 55%.

The shape of the hollow fiber is not particularly limited, and in addition to the circular cross section, it can be freely adopted such as triangular, flat, star-shaped, boomerang-shaped and the like. In this case, the hollow portion may have the same shape as the fiber or a different shape.

In the present invention, the hollow fibers are woven, knitted or otherwise formed into a cloth, and then partially dissolved with a solvent or a solution for dissolving the polymer.
In particular, microgrooves are formed along the polymer joint.

The microgrooves are at least one low-orientation portion existing in a thin skin portion of a hollow fiber, for example, a joint portion of a polymer discharged from a hollow discharge port, particularly a warp yarn and a weft yarn to which excessive stress is applied during knitting. The joining portion existing at the intersection with and is preferentially melted and formed to reach the hollow portion.

The width of the microgroove is 0.2 to 1
It is formed in a range of 0 μm and a length of 5 to 200 μm. Generally speaking, the width of the microgroove is 0.2 μm.
If the length is less than 5 μm or less than 5 μm, it becomes difficult to soak the fiber function-imparting agent, while the width is 10 μm.
When it exceeds m or the length exceeds 200 μm, the fiber surface is likely to be fibrillated, the abrasion resistance is deteriorated, and it becomes difficult to maintain the hollow portion.

In the case of polyester fibers, for example, the partial dissolution treatment for forming the microgrooves is preferably carried out more rapidly than the alkali reduction treatment which is usually carried out, and the concentration of sodium hydroxide or potassium hydroxide aqueous solution is preferable. At 50-250 g / l and 2 at 80-140 ° C
It is preferable to treat for about 60 minutes.

In the hollow portion of the hollow fiber thus obtained,
The presence of a fiber function-imparting agent is preferred.

As a method for putting the fiber function-imparting agent in the hollow portion, the function-imparting agent is added to the dyeing bath and treated in the bath simultaneously with dyeing of the cloth, or the cloth is dipped in the bath containing the function-imparting agent. Examples of the method include pressing with a mangle afterwards, knife coating with a high-viscosity solution, and the like.

Examples of the fiber function imparting agent include the following.

Plant extract, plant protein An aqueous solution or extract extracted with water or an alkylene glycol aqueous solution (for example, propylene glycol 45% water) is dried and pulverized. Aloe, Aloe Vera, Scutellaria (Scutellaria), Otaku (Kihada), Cuckoo (Kudzu), Chamomile, Cucumber, Kouka (Safflower), Wheat, Rice, Sanshin (Garden), Shea, Sikon (Murasaki), Peonies, White birch, Senkyu, Assemblies, Tassou (jujube), dice, tea, (black tea / green tea), Japanese tuki, chimpi (Japanese citrus fruit), Japanese tuki,
Spruce (red sea bream), tomato, Nishidzin, garlic, bakumonnadou (janohige), hamamelis, loofah, hops, peach moinin (coix barley), lemon, logwood, altea, arnica, ginkgo, hypericum, kaiso, kakkon (kizu), kiwi, Kujin (Clara), Souakuhi (Kuwa) Salvia, Salamander, Ziou (Akagyojiou), Clove (Clove), Toki Kinsenka, Juyaku (Hikiokoshi), Bodaiju, Astragalus, Sohakuhi, Cha, Kujin, Kouka, etc.

Animal protein human placenta, cow placenta, human splenic band, cow skin, pig skin, cattle ligament,
Cow blood, cow brain, pig stomach, chicken cap, lactococcus, crab shell, milk,
Silk, brewer's yeast, whey, casein, cow blood, etc.

Ceramic fine particles A single-composition fine particle or a mixed fine particle thereof, which is composed of a metal oxide, a carbide, a nitride, and a silicate having an average primary particle diameter of 0.01 to 1 μm. Specifically, titanium oxide, zinc oxide, colloidal silica, iron oxide, aluminum oxide, zirconium carbide, zeolite, spiolite.

Compounds having antibacterial and / or deodorant properties The antibacterial properties as used herein refer to antifungal properties, antiseptic properties, resistance to bacteria, bactericidal properties, repellent properties against insects and mites. Deodorant properties include deodorant properties. Specifically, octacarbo iron phthalocyanine, phthalic acid dimethyl, phthalic acid diethyl, and adipic acid methyl ester.

Further, there is one shown in (Chemical Formula 1).

[0032]

[Chemical 1]

The following fiber function-imparting agents can also be exemplified.

Aromatic compounds Natural polysaccharides Water-absorbing and / or hygroscopic compounds Water-repellent compounds

[0035]

As described above, the present invention focuses on the low orientation of the polymer-bonded portion of the hollow fiber, and in the hollow fiber having a hollow ratio of 25% or more, the hollow fiber is composed of the same polymer, It was made based on the finding that the parts show extremely high chemical weight loss.

FIG. 3 shows a cross section of a hollow-fiber (here circular) spinneret, and such a hollow-fiber spinning spinneret always comprises a plurality of slits (here, four). Then, there is a gap between the ends of each slit (S _{1 to} S ₄ ) (usually called a canal), and in the hollow fiber after discharge, the portion corresponding to the canal becomes the polymer joint.

When such a hollow fiber made of polyester, for example, is treated with alkali, four microgrooves are formed in the same cross section as shown in FIG.

In this case, since the hollow fiber can be composed of a single polymer, even after the chemical reduction, the microgrooves communicate with the hollow portion without fear of completely removing the polymer different from the polymer of the core portion. Hollow fibers are obtained.

Moreover, in the present invention, the above-mentioned microgrooves are hollow fibers which are subjected to a chemical weight-reducing treatment (as a whole or a part of the fabric), and the hollow fibers are most stressed, that is, a woven fabric. It was also found that in the above case, the warp and weft crossover occurs, and in the case of a knitted fabric, it occurs noticeably at the joint between hollow fibers.

In consideration of the fact that the cloth portion that comes into contact with human beings is mainly the above-mentioned crossing and crossing portion and the binding portion, moisture absorption and sweat absorption are remarkably improved, and a cloth having a refreshing feeling is provided. Means Of course, by introducing a desired fiber function-imparting agent into the hollow portion through the microgrooves, it is possible to further improve the added value of the cloth.

The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

[0042]

Example 1 Polyethylene terephthalate having an intrinsic viscosity of 0.61 was melted, and an undrawn yarn of hollow fiber having a hollow ratio of 40% was obtained using the hollow spinneret shown in FIG. Next, this unstretched yarn was stretched to obtain a multi-filament yarn having a round hollow and a density of 50 denier and 20 filaments (titanium oxide amount: 0.3% by weight).

A plain weave was prepared, scoured and preset according to a conventional method. 50 g of sodium hydroxide /
It was treated for a short time (10 minutes) in 1 l of hot water (105 ° C.) to reduce the weight loss rate to 15%, and then dyed under the following conditions.

Conditions: ・ Sumikalon Navy Blue S-2GL
(Manufactured by Sumitomo _{Chemical) 4% owf · CH 3 COOH} 0.3g / l · Disper VG ( manufactured by Meisei Chemical Works, Ltd.) 0.5 g
/ L ・ After dyeing at 130 ℃ for 60 minutes, dry at 100 ℃ for 5 minutes

The multifilament yarn was taken out from the obtained cloth and the surface thereof was observed by an electron microscope. As a result, the width was 0.2 to 2.0 μm and the length was 10 per 100 μm in the fiber axis direction.
At least one micro-groove of ˜150 μm was observed.

Next, the yarn was mixed with sodium pyrrolidonecarboxylate and triacylglycerol (tandol DC).
-87, after immersing in a 5% aqueous solution of Daiwa Chemical Industry Co., Ltd., and squeezing with a mangle (pickup rate 60%),
It was dried at 100 ° C for 5 minutes and cured at 160 ° C for 30 seconds.

A mixture of sodium pyrrolidonecarboxylate and triacylglycerol was present in the hollow portion of the fiber of the obtained cloth, and as shown in Table 1, the cloth showed a soft texture and high hygroscopicity. . This fabric was excellent in durability against washing, and the feeling and hygroscopicity were the same as those of the initial stage even after 10 times of washing.

[0048]

[Table 1]

The measurements in the examples are as follows.

(1) Moisture Absorption Rate The sample was predried at 50 ° C. × 2 Hr, conditioned at 20 ° C. for 3 days and nights, and absolutely dried at 105 ° C. × 2 Hr (weight at this time was W ₀ ). Next, 2H in a desiccator at 20 ° C x 90% RH.
The weight (W ₁ ) was measured after the r was put in, and the moisture absorption rate was calculated by the following formula.

[0051]

[Equation 1]

(2) Washing durability According to JIS L-1018-77 6.36 H method,
The washing was repeated 10 times.

[0053]

[Example 2] When polyethylene terephthalate having an intrinsic viscosity of 0.61 was spun, it was rapidly spun to make the orientation of the thin skin portion of the hollow fiber non-uniform in the cross-sectional direction, and then stretched to give a hollow (hollow ratio). 48%) and 50 denier multifilament yarn of 15 filaments (titanium oxide amount 2.5% by weight) were obtained. A twill was prepared, scoured and preset according to a conventional method.

200 g of sodium hydroxide was obtained.
After immersing in a 1 / l aqueous solution, squeezing with a mangle (pickup rate 100%), immediately steaming with saturated steam at 100 ° C. (5 minutes) to reduce the weight loss rate to 13%, and dyeing under the following conditions.

Conditions: ・ Sumikalon Red E-FBL (Sumitomo Chemical Co., Ltd.) 4% owf ・ CH ₃ COOH 0.3 g / l ・ Disper VG (Meisei Chemical Co., Ltd.) 0.5 g
/ L ・ Drying at 100 ℃ × 5 minutes after dyeing at 130 ℃ × 30 minutes

A multifilament yarn was taken out from the obtained cloth, and its surface was observed by an electron microscope. As a result, the width was 0.5 to 6.0 μm and the length was 20 per 100 μm in the fiber axis direction.
At least one micro-groove of ˜180 μm was observed.

Then, after soaking in a liquid of squalane (hexamethyltetracosane hydrogenated from shark liver oil and hydrogenated, C ₃₀ H ₆₂ , manufactured by Wako Pure Chemical Industries), after squeezing with a mangle (pickup rate 60%) Dry at 100 ℃ for 5 minutes, 1
It was cured at 60 ° C for 30 seconds.

Squalane was present in the hollow part of the fiber of the obtained cloth, and the obtained cloth was smooth and had a soft touch and a good touch. This fabric was excellent in durability against washing, and this feeling did not change after 10 times of washing.

[0059]

Example 3 The dyed cloth of Example 1 was used and immersed in a 10% aqueous solution of a dispersion of an organic acid ester (trade name: Aninsen CBT, manufactured by Daiwa Chemical Industry Co., Ltd.), which is an anti-mitic agent. Then, it was pressed with a mangle (pickup rate 55%), dried at 100 ° C. for 5 minutes, again immersed in the same liquid, pressed and dried, and cured at 160 ° C. for 1 minute.

The mite-preventing agent was present in the hollow part of the fiber of the obtained cloth, and it showed a soft texture and high mite-proofing property (the repelling rate of the mite dust mite 92.8%). The tick repellent test method and the repelling rate were calculated as follows.

(Test method for anti-mite property) A plastic petri dish having a diameter of 4 cm and a height of 0.6 cm is placed on an adhesive sheet, and six identical petri dishes are placed around the petri dish so that the edges of the petri dish are always in contact with the central petri dish. .

Approximately 3,000 individuals of mite medium were added to the center petri dish as the number of surviving mites, and 6 petri dishes around the petri dish containing the ticks were alternately laid with samples of treated and untreated plots. Place 0.05 g of mite-free powdered feed on each sample. Put this together with the adhesive sheet in a 27 x 13 x 9 cm plastic container for product storage, add saturated saline solution and cover to keep the humidity in the container at about 75%, and put it in a thermostat at 26 ° C ± 1 ° C. Store and raise for one day.

On the next day, the powder feed on the sample was collected by the saturated saline floating method, and the sample was collected by the washing method, and then counted.
The repellent rate was calculated by applying the following formula. The test was repeated 3 times in consideration of variations. As a mite, a mite mite was used.

[0064]

[Equation 2]

[0065]

Example 4 The same operation as in Example 1 was performed except that the hollow ratio of the hollow fiber was adjusted to 25%.

A multifilament yarn was taken out from the obtained cloth, and its surface was observed with an electron microscope. As a result, the width was 0.2 to 2.0 μm and the length was 10 per 100 μm in the fiber axis direction.
At least one micro-groove of ˜150 μm was observed. Further, the fabric exhibited a soft texture and high hygroscopicity, and the texture and hygroscopicity were the same as those of the initial stage even after 8 times of washing.

[0067]

As described above, according to the present invention, it is not necessary to use two or more kinds of polymers as in the prior art, and therefore, the microgroove communicating with the hollow portion is provided in a dimension beyond the conventional concept. It is also formed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a hollow fiber forming at least a part of a fabric of the present invention, showing a state in which four microgrooves communicate with a hollow portion.

FIG. 2 is a side view of the hollow fiber, showing the shape of microgrooves.

FIG. 3 is a cross-sectional view showing an example of a spinneret for spinning a round hollow fiber.

[Explanation of symbols]

S _{1 to} S ₄ Polymer that constitutes the thin-skin portion of the hollow fiber G _{1 to} G ₄ Microgrooves that communicate with the hollow portion of the hollow fiber S ′ _{1 to} S ′ ₄ Slit C that constitutes the hollow fiber prevention die C Between the slit ends Void

Claims (18)

[Claims] 1. At least 2 composed of a single polymer
In a fabric containing hollow fibers having a high hollowness of 5%,
A fabric made of hollow fibers, wherein in the longitudinal direction of the hollow fibers, microgrooves as removal marks of the polymer are present in a state of communicating with the hollow portions along the polymer joints. 2. The fabric made of hollow fibers according to claim 1, wherein the fabric is a woven fabric. 3. The fabric made of hollow fibers according to claim 2, wherein the microgrooves are mainly present at the intersections of the warp yarns and the weft yarns. 4. A fabric made of hollow fibers according to claim 1, which is a knitted fabric. 5. The fabric made of hollow fibers according to claim 4, wherein the microgrooves are mainly present near the binding portion. 6. The width of the microgroove is 0.2 to 10 μm.
The hollow fiber cloth according to claim 1, wherein m is 5 to 200 μm. 7. At least 2 composed of a single polymer
A fabric containing hollow fibers having a high hollowness of 5% is treated with a solvent or a solution that dissolves the polymer to intermittently exfoliate a low orientation portion along a polymer joint portion of the hollow fiber. And a method for producing a fabric made of hollow fibers. 8. The method for producing a fabric made of hollow fibers according to claim 7, wherein the solution is an alkaline solution. 9. The method for producing a fabric made of hollow fibers according to claim 8, wherein the alkali treatment is carried out at an alkali concentration of 50 to 250 g / l, a temperature of 80 to 140 ° C., and a treatment time of 2 to 60 minutes. 10. A fabric composed of a single polymer and comprising hollow fibers having a high hollowness of at least 25%, in the longitudinal direction of the hollow fibers being along the polymer joints as a trace of removal of the polymer. A fabric made of hollow fibers, characterized in that the microgrooves are present in a state of communicating with the hollow portions, and the fiber function-imparting agent is present in the hollow portions. 11. The cloth according to claim 10, wherein the fiber function-imparting agent is a plant extract and / or a plant protein. 12. The fabric according to claim 10, wherein the fiber function-imparting agent is a vegetable protein. 13. The cloth according to claim 10, wherein the fiber function-imparting agent is fine ceramic particles. 14. The cloth according to claim 10, wherein the fiber function-imparting agent is a compound having antibacterial and / or deodorant properties. 15. The cloth according to claim 10, wherein the fiber function-imparting agent is a compound having an aromatic property. 16. The fabric according to claim 10, wherein the fiber function-imparting agent is a natural and / or synthetic polysaccharide. 17. The fabric according to claim 10, wherein the fiber function-imparting agent is a compound having water absorbency and / or hygroscopic property. 18. The fabric according to claim 10, wherein the fiber function-imparting agent is a compound having water repellency.