JPH07118925A - Antifungal polyamide tow for stretch-breaking spinning and production thereof - Google Patents

Abstract

PURPOSE:To obtain the polyamide tow capable of stretch-breaking spinning in a high productivity by applying a surfactant and a specific amount of inert fine particles on the filament surface and a sufficient amount of silver- substituted antimicrobial zeolite in the filament. CONSTITUTION:The polyamide filament tow has a surfactant and inert fine particles on the surface and contains silver-substituted antimicrobial zeolite inside. The inert fine particles are preferably silica or the like. The particle pick-up is 0.01 to 1.0wt.% preferably 0.05 to 0.5wt.%, based on the fibers and enough to lower the abrasion resistance between the filaments on stretch breakage. The content of the silver-substituted zeolite depends on the amount of silver, and usually 0.01 to 20wt.%, preferably 0.1 to 2wt.%, based on the fiber.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention has a good drafting property,
TECHNICAL FIELD The present invention relates to an antibacterial polyamide tow suitable for obtaining a high-quality antibacterial sliver by stretch spinning and a method for producing the same.

[0002]

2. Description of the Related Art The fineness of a single yarn is 2.5 d or less,
Polyamide staple having a relatively long fiber length such as 70 to 130 mm has a significantly poor spinning property. Therefore, particularly in the card process, there is a big problem that productivity is deteriorated due to cylinder winding and sliver quality is deteriorated due to nep. However, it has been difficult to obtain a satisfactory fine count spun yarn.

On the other hand, as a spinning method aimed at improving the spinnability of fine-fineness fibers, there is stretch-cut spinning. This draft-spinning is a method of directly making a sliver while draft-cutting, and bulky spun yarn, high-strength spun yarn, and the like are manufactured from this sliver.

[0004] This draft-spinning spinning has been generally used for acrylic fibers and polyvinyl fibers because a sliver having a relatively fineness and a long fiber length can be easily obtained. However, it is difficult to draw-spin a polyamide fiber or a polyester fiber from the relationship of the elongation level of the single fiber,
Most of these fibers were not subjected to stretch-bending.

Therefore, in order to enable the polyester fiber to be draft-spun, a method of improving draft-cutting property by reducing elongation has been proposed (Japanese Patent Laid-Open No. 53-98418, etc.).

Further, industrial implementation of the draft-spinning of polyamide fibers has also been studied, and a method has been proposed in which the fineness and cutting elongation of the single fibers constituting the polyamide tow are set to specific values (JP-A-2- No. 41422). With this method, it is possible to industrially perform the draft-spinning of polyamide fibers to some extent, and it is possible to obtain a polyamide sliver having a relatively fineness and a long fiber length.

[0007]

However, its draft-cutting property is still inferior to that of the conventional tow of acrylic fiber or polyvinyl fiber,
From the viewpoint of industrially stable production, it was difficult to say that it has sufficient drafting property.

When the drafting property is poor, for example, during drafting,
The separation properties of the fibers that make up the tow become poor, and production problems such as collective breakage of the tow-constituting single fibers and roller winding due to the generation of static electricity are likely to occur. In addition, if the drafting property is poor, the fiber length variation is large, and a sliver with a drafting unevenness is likely to be formed, resulting in poor sliver quality.

Due to the recent boom in health and cleanliness, particularly in lingerie, underwear, stockings, socks such as socks, etc., which are in direct contact with bare skin, they have an excellent antibacterial action against microorganisms such as bacteria and fungi. There has been a demand for a polyamide fiber having an antibacterial property. Therefore, a technique has been proposed in which a silver ion-substituted antibacterial zeolite is incorporated into the fiber to form an antibacterial fiber (Japanese Patent Publication No. 63-540).
13 and JP-A-4-228608).

The production of a polyamide tow for drafting from this antibacterial polyamide was studied, but the above-mentioned problem of drafting property could not be solved, and an antibacterial polyamide tow for drafting was not obtained. It was difficult.

In view of the above, the present invention solves the above-mentioned problems of the prior art, and it is possible to sufficiently suppress the occurrence of production troubles such as collective cutting at the time of drafting and roller winding, and to perform drafting spinning with high productivity. The main object of the present invention is to provide a polyamide tow for check-and-spin spinning having excellent antibacterial properties.

The present invention also makes it possible to industrially obtain an antibacterial polyamide sliver composed of short fibers having a fineness and a long fiber length by the draft spinning.

A further object of the present invention is also to provide a suitable method for producing the antibacterial polyamide tow for the draft spinning.

[0014]

In order to achieve this object, the antibacterial polyamide tow for drafting and spinning according to the present invention (Claim 1) comprises a silver-substituted antibacterial zeolite in an amount of 0.01 to 0.01% per fiber. 20% by weight of antibacterial polyamide fiber, the surface of the fiber is coated with a surfactant and inactive fine particles, and the amount of the inactive fine particles is 0.01 to 1.0% by weight based on the fiber. Is characterized in that.

Further, the method for producing the antibacterial polyamide tow for stretch-break spinning according to the present invention (claim 3) is 0.01 to 20% by weight.
2. The draft-spinning spinner according to claim 1, wherein the antibacterial polyamide containing the silver-substituted antibacterial zeolite is melt-spun, and after cooling and solidification, oil treatment is performed with an oil solution containing a surfactant and inert fine particles, followed by stretching. It is characterized by producing a polyamide tow for use.

The present invention will be described in detail below.

The tow in the present invention is made of polyamide fiber. Although various polyamide fibers can be used as the polyamide fiber, nylon 6 or nylon 6 is substantially used in terms of cost, mechanical properties, thermal properties and the like.
Most preferred is a fiber consisting of 6.

Examples of the silver-substituted zeolite used in the present invention include the following.

The zeolite before substituting with silver is an aluminosilicate having a three-dimensional skeleton containing SiO ₂ and Al ₂ O ₃ as main components, and either natural zeolite or synthetic zeolite can be used. Typical examples are Chabazite and Clinoptilolite.
lite), erionite, Faujasite, mordenite and other natural zeolites; A type, X type, Y type, mordenite type, pentasil type, ferrierite type, beta type, ZSM-5 Mold,
Synthetic zeolites such as ZSM-11 type are suitable. Zeolites having a high SiO ₂ / Al ₂ O ₃ molar ratio of, for example, 15 or more are preferred in order to suppress coloration in melt spinning and enhance particle dispersibility.

These zeolites may be silver-substituted zeolites by substituting silver ions with alkali or alkaline earth metals in the zeolite by an ion exchange reaction. Specifically, it may be treated with a solution of a water-soluble silver compound. The silver-substituted zeolite used in the present invention may be a composite type antibacterial zeolite in which other metal ions (copper, zinc, etc.) are simultaneously substituted with silver ions.

The substitution amount of silver ion depends on the structure of zeolite,
Although it varies depending on the SiO ₂ / Al ₂ O ₃ molar ratio and the like, a range of 0.1 to 20% by weight is generally suitable.

The content of the silver-substituted zeolite in the polyamide fiber varies depending on the amount of silver substituted, but generally 0.01 to 20% by weight based on the fiber is suitable. Among them, 0.05 to 5% by weight is preferable, and 0.1 to 5% is particularly preferable.
2% by weight is preferred. If the blending amount is too small, the antibacterial effect is insufficient. On the other hand, if the amount is too large, it becomes difficult to form a fiber, and since the coloring becomes large, the fiber color tone after dyeing deteriorates, and the commercial value remarkably decreases.

The method for blending the silver-substituted zeolite with the polyamide fiber may be either during the polymerization of the polyamide fiber raw material or before the spinning, but among them, the polymerization completion such as before the polyamide polymerization or during the polymerization is completed. The addition in the previous stage is preferred in order to finely disperse the zeolite particles uniformly in the polyamide.

It is preferable to add a sparingly water-soluble copper compound to the polyamide thus added with the silver-substituted antibacterial zeolite in order to suppress the deactivation of the antibacterial property.

The sparingly water-soluble copper compound is prepared by mixing water 1 at 20.degree.
As represented by a copper compound having a dissolution amount of 100 mg or less with respect to 00 g, it is a copper compound that can be dissolved in water at all or only in a very small amount, such as cuprous chloride, cuprous iodide and cuprous bromide. Typical examples are copper halides; inorganic acid coppers such as copper carbonate and copper oxide; organic acid coppers such as copper benzoate.

The most poorly water-soluble copper compound is most preferably a copper halide, particularly copper iodide, in that it can be dissolved or finely dispersed in polyamide.

The compounding amount of this copper compound is 0.
It may be 001 to 1.0% by weight. Above all 0.00
5 to 0.5% by weight is preferable, and 0.01 to 0.1% by weight is particularly preferable. If the blending amount is too small, the antibacterial deactivation suppressing effect is insufficient, and conversely, if the blending amount is too large, troubles such as yarn breakage and increase in coloring during yarn production are likely to occur.

On the other hand, in the case of using the composite metal-substituted zeolite in which copper is added together with silver as a substitution metal in the zeolite, almost no antibacterial deactivation suppressing effect is obtained, and the antibacterial property of the dyed product is satisfied. Difficult to hold.

An auxiliary agent may be added at the same time in order to assist the dissolution and dispersion of these copper compounds in the polyamide and to stabilize the copper compound. Examples of the auxiliary include alkali halides represented by potassium iodide, sodium iodide, potassium bromide, and sodium bromide. Among them, potassium halide is preferable.

The amount of the alkali halide compounded is generally 0.001 to 1.0% by weight based on the fiber. Further, 0.01 to 0.1% by weight is preferable. Actually, it may be blended in the same number of moles as the copper compound. This alkali halide is effective in stabilizing the copper compound in the polyamide and suppressing the coloring of the polyamide by the copper compound.

The copper compound is preferably blended with the polyamide before spinning. For example, a copper compound that can be pulverized to such an extent that it does not hinder fiber formation may be blended with a polyamide (pellet) in a powder form, sufficiently mixed, and then subjected to spinning. Further, the copper compound that can be dissolved in the solvent may be formed by sprinkling the concentrated solution, which has been dissolved, on the polyamide and then drying.

On the other hand, when the copper compound is added together with the silver-substituted zeolite before the polymerization, the copper compound is metal-substituted and adsorbed in the zeolite during the polymerization,
In order to allow a predetermined amount of copper compound to exist independently, it is necessary to add a large amount of copper compound in anticipation of the amount taken into the zeolite, and the coloring and discoloration over time of the fiber obtained by this large amount of copper compound. It is easy to occur and is not preferable.

The antibacterial polyamide fiber is a conventional additive such as a heat-resistant agent, a light-proof agent, a dispersant, and an antistatic agent, as long as it is a compound that does not reduce its effect by reacting with copper ions or silver ions. May be contained at the same time.

The single fibers constituting the tow of the present invention have a surface active agent and inert fine particles attached to the fiber surface,
Then, the amount of the inert fine particles deposited is 0.01 to 1.0.
It is necessary to be wt%. Furthermore, 0.05-
0.5% by weight is preferred. If this amount of adhesion is too small, it is difficult to sufficiently reduce the friction resistance between single fibers at the time of drafting, and the object of the present invention cannot be achieved. On the other hand, when the amount is too large, the desired effect reaches saturation, but on the other hand, many of the inactive fine particles fall off during the process, and it becomes easy to induce obstacles when passing through the process.

The inert fine particles used in the present invention include titanium oxide, aluminum oxide, magnesium oxide, zinc oxide,
Metal oxides such as ferrite, magnesium carbonate, calcium carbonate, silica, talc, zirconia, silicon nitride,
It refers to fine particles such as graphite, and among them, silica is the most preferable in achieving the object of the present invention.

The average particle size of the inert fine particles is 1 to 500 mμ.
Is preferable, and more preferably 5 to 200 mμ. If it is less than 1 mμ, it is difficult to sufficiently exert the frictional resistance reduction effect by the particles attached to the fiber surface, and if it exceeds 500 mμ, the constituent single fibers may be damaged and fall off from the fiber surface. The drawback becomes easier to do.

The shape of the inert fine particles is not particularly limited, such as a substantially spherical shape, a needle shape, or a plate shape, but it is a substantially spherical fine particle from the viewpoint of the effect of reducing the frictional resistance, the difficulty of scratching the surface of the constituent single fiber, and the like. It is preferable.

Further, the inactive fine particles adhered to the surface of the fiber together with the surfactant may be agglomerated, but even if they are agglomerated, there is basically no problem in the present invention. However, it is preferable that the particles are uniformly attached in a state where they are not aggregated as much as possible in order to sufficiently achieve the object of the present invention.

As the surfactant to be attached to the surface of the fiber, carboxylate of higher fatty acid, sulfuric acid ester salt of higher alcohol or higher alkyl ether, alkylbenzene sulfonate, paraffin sulfonate, higher alcohol phosphate ester salt, higher salt Anionic surfactants such as alkyl phosphate ester salts and higher alcohol ethylene oxide adduct phosphate ester salts, amphoteric surfactants such as amino acid type amphoteric surfactants, betaine type amphoteric surfactants, and sulfate ester type amphoteric surfactants. Agents, nonionic surfactants such as polyethylene type, glycol type and polyalcohol type are used. If necessary, two or more kinds of these surfactants may be mixed and used. Further, a cationic surfactant may be used as a small amount component in combination with the above components.

Of these, higher alcohol phosphoric acid ester salts such as potassium salts of higher alcohol phosphoric acid esters having 12 to 18 carbon atoms are preferable.

This surfactant is necessary for imparting a suitable slimy property to the fiber surface so as to make it look like animal hair, and it also prevents the generation of static electricity at the time of drafting and prevents adhesion of the fiber surface. It is also necessary to suppress the occurrence of troubles at the time of drafting such as roller winding together with the inert fine particles.

The amount of the surfactant attached to the tow (the amount of oil attached to the tow) is preferably 0.1 to 3.0% by weight. If it is less than 0.1% by weight, it is difficult to obtain a sufficient effect of improving the drafting property, and if it is more than 3.0% by weight, the surfactant is likely to fall off to the roller during the drafting. It causes troubles such as winding around the roller.

Further, a polysiloxane fiber treating agent may be attached to the surface of the single fiber constituting the tow of the present invention, in addition to the surfactant and the inactive fine particles.

Examples of the polysiloxane-based fiber treating agent include anionic non-reactive polysiloxanes such as dimethyl type and methylphenyl type, nonionic nonreactive polysiloxanes of modified polyether type, and high polymer anionic type. Alternatively, a cationic reactive polysiloxane or the like can be used, and among them, a highly polymerized cationic reactive aminoalkyl polysiloxane is preferable.

The combined use of the polysiloxane fiber treating agent is effective for further increasing the effect of the above-mentioned surfactant. However, during high-order processing of tow such as draft cutting, it may fall off from the fibers and adhere to the rollers and guides, and conversely it may induce problems such as tow winding. Is preferably controlled to 1.0% by weight or less. The polysiloxane-based fiber treatment agent also has the effect of improving the slipperiness between the constituent single fibers and further improving the collective breakage during the draft.

The monofilament constituting the tow of the present invention preferably has a breaking elongation (average value) of 55% or less, more preferably 45% or less in order to further improve the draft cuttability. Further, the single yarn fineness and the cross-sectional shape are not particularly limited. For example, it may have a relatively fineness of 2.5d or less and a soft texture such as cashmere animal hair, or it may be mixed with wool of 3d or the like to make a fine count while utilizing the texture of the mating material. You may aim at conversion. Its cross-sectional shape is
In addition to the round cross section, a polygonal cross section such as a triangular cross section and a square cross section, a flat cross section, and a hollow cross section may be used.

The total fineness of the tow of the present invention depends on operability, productivity,
From the viewpoint of the capacity of the check-and-break device, the packing form, etc.
It is preferably 0,000 denier, and more preferably 300,000-
It is preferably 600,000 denier.

The average strength of the monofilament constituting the tow of the present invention is preferably 3 to 10 g / d in consideration of the anti-pill property and also in consideration of the practicality at the time of manufacturing the cloth.

Next, a method for producing the tow of the present invention from the above-mentioned antibacterial polyamide will be described.

The antibacterial polyamide produced by the above method is subjected to melt spinning. The antibacterial polyamide may be one obtained by remelting once solidified chip-shaped polyamide with a spinning machine such as an extruder or a pressure melter system, or may be directly provided for spinning after polymerization. Good.

The molten polyamide is discharged into a fibrous form through a spinneret. At this time, the cross-sectional shape of the fibers or the composite state is not particularly limited. The fibrous material discharged from the spinneret is cooled and solidified by a usual method, and then collected. As a method of collecting the material, there are a method of winding the material on a drum and a method of storing it in a can. Further, the take-up speed is not particularly limited. It may be collected at a low speed of about 300 m / min, about 2500 m / min or more, and even 50
You may collect at high speeds, such as 00 m / min or more.

When the take-up speed is sufficiently high and a high orientation is obtained, it can be subjected to the draft-spinning without being substantially stretched, but in the case of other unstretched or intermediate orientation, After that, the film is stretched and subjected to a draft spinning.

The taken tow is usually drawn after aligning a plurality of the so that the total fineness after drawing is 100,000 to 1,000,000 denier. As the stretching method, a method of stretching the tow between rollers having different peripheral speeds is usually adopted. At the time of stretching, a method of heating with steam or hot water to improve the stretchability may be used.

In order to obtain a tow having a cutting elongation of monofilament as low as 55% or less, for example, a method of heat treatment after stretching may be carried out while limiting shrinkage on a hot plate or a thermal drum. The heat treatment temperature is preferably 100 to 200 ° C., and some stretching or relaxation may be performed during that time.

After that, the tow is improved to improve the spinning property.
Usually, crimps are applied by a push-type crimp applying device,
Further, if necessary, it is dried at a temperature of 100 ° C. or lower.

The inactive fine particles and the surfactant adhering to the fiber surface of the tow of the present invention may be applied individually or simultaneously at any stage of the above production process,
Above all, it is preferable that the tow is applied by an oil solution containing both components at the same time when the tow is subjected to the oil supply treatment.

The oil solution containing the inert fine particles and / or the surfactant may be applied to the tow by a dipping method or a spray method (spray method or shower method). The imparting step may be performed before or after stretching the tow, after heat treatment under a fixed length, after crimping, or after drying, and carried out at one or more points in these steps. do it.
In particular, it is preferable to apply it by a dipping method before stretching the tow. When a polysiloxane-based fiber treatment agent is applied, it may be similarly added by blending in the oil solution.

The oil solution for this refueling treatment is preferably a water emulsion solution, and its concentration is 0.5 to 10% by weight.
The content of the surfactant is about 0.5 to 10% by weight,
The content of the inert fine particles may be about 0.01 to 1.0% by weight.

Then, the amount adhered (the amount of oil attached to the tow)
Is not particularly limited as long as the amount of the inert fine particles adhering to the fiber surface is a predetermined amount, but generally 0.01 to 1.0.
About wt% is used.

The inert fine particles in the oil solution during the refueling treatment may be colloidally dispersed in a dispersion medium mainly composed of water. Depending on the case, it may be dispersed in an organic solvent such as alcohols, ethers, glycols, ketones, esters, etc., or dimethylformaldehyde.

The antibacterial polyamide tow for drafting and spinning according to the present invention is drafted by a tow drafting device to form a sliver, and then a finely spun yarn or the like in the form of a woven fabric or a knitted fabric product according to the application do it.

In the steps up to the formation of these fabrics, the antibacterial synthetic fibers are other synthetic fibers such as ordinary polyamide fibers, polyester fibers, acrylic fibers; or cotton,
Mixed with natural fibers such as wool (for example, mixed spinning, mixed knitting,
However, it is preferable to design the fabric so that the content of the antibacterial synthetic fiber of the present invention in the fabric product is 15% or more. When the mixing ratio is as low as less than 15%, it is difficult to exert a sufficient antibacterial effect in the final product.

As described above, the final product is obtained by a method according to the application, but at any stage until the final product is obtained,
It is dyed by a usual method and, if necessary, finished. As the dye, a dye generally used in synthetic fibers, that is, a disperse dye, an acid dye, a basic dye, a direct dye, or the like can be used. Further, as the finishing processing, there may be mentioned ordinary finishing processing such as water repellent, antistatic and soft processing.

[0064]

The antibacterial polyamide tow for stretch-and-spin spinning of the present invention contains silver-substituted zeolite dispersed in the fiber, so that it easily serves as a cutting start point during the stretch-and-slip, and a specific amount of inactive fine particles on the fiber surface. Since the fibers are attached, the frictional resistance between the fibers is greatly reduced, and the separating property is improved, so that the group breakage at the time of drafting is largely prevented. At the same time, the generation of static electricity is suppressed, and production troubles such as winding of rollers are largely prevented.

That is, in the case of the conventional polyamide tow to which the inert fine particles are not attached, the fiber surface is smoother than that of the acrylic fiber or the polyester fiber having a high Young's modulus whose fiber surface is fibrillated due to the wet spinning method. Since the Yank ratio is low, the adhesion between single fibers is high and the frictional resistance is liable to increase, which results in a poor splitting property of the fibers constituting the tow. Or, it causes production trouble such as roller winding due to static electricity generation.

However, in the case of the tow of the present invention, since the surfactant and the specific amount of the inert fine particles adhere to the fiber surface of the tow, this significantly reduces the frictional resistance of the fiber surface, and As a result, the yarn breakage is greatly prevented during stretch check. At the same time, generation of static electricity is suppressed and production troubles such as roller winding are largely prevented.

As a result, the drafting property is significantly improved, and nylon 66 tow can be draft-spun with high productivity, and the quality of the obtained sliver is also improved.

Although the inert fine particles such as titanium dioxide are usually blended inside the fibers, it is difficult to allow a desired amount of the inert fine particles to be present on the surface of the fibers by such addition inside the fibers. The object of the present invention cannot be achieved,
Moreover, there is a great limitation that the inactive fine particles mixed in the polymer inevitably result in a fiber having a strong dull tone.

Further, the silver-substituted zeolite has a far superior antibacterial property as compared with the zeolite containing only other antibacterial metals such as copper, so that a desired antibacterial effect can be obtained with a small amount of use. Moreover, since its antibacterial performance is excellent in washing resistance, it is suitable for applications such as clothing.

As in the manufacturing method of claim 4, the silver-substituted antibacterial zeolite is added at a stage before the polymerization of the polymer is completed, and the sparingly water-soluble copper compound is added to the polymer before spinning to obtain the antibacterial property. Polyamide, melt spinning,
By adopting the methods of cooling and solidification, oiling treatment, and stretching, polyamide tow excellent in antibacterial performance can be produced by an industrially easy method.

[0071]

EXAMPLES The present invention will be specifically described below with reference to examples.

The characteristic values and the like below were measured by the following methods.

(1) Tow attached oil amount: JIS L 10
Extracted amount (% by weight) according to the method of 15-7-22 (2)
Ask for. Next, the extract is decomposed to obtain the equivalent amount of the polyamide polymer monomer and oligomer (hereinafter, MO amount, weight%) by the Kjeldahl nitrogen determination method. Then, the tow-attached oil amount is calculated by the following formula. Tow-adhered oil amount (% by weight) = extract-MO amount However, to decompose the extract, a mixture of sodium sulfate: potassium sulfate: copper sulfate = 1: 2: 1 (weight ratio) was used as a decomposing agent, and Sulfuric acid is added to decompose by heating.

(2) Tow-adhered silica amount: The extract of the adhering components obtained by washing the tow with hot water is dried to dryness and then wet ashed. The obtained ash is heated and dissolved in nitric acid, and silicon is quantitatively analyzed by an atomic absorption method. Then, the amount of silica is calculated.

(3) Concentration of active ingredient of oil agent: About 10 g of the oil agent was placed in a conical beaker and sufficiently evaporated to dryness in a dryer at 90 to 98 ° C. Weight of oil before evaporation to dryness (W
2), the weight (W3) of the oil agent after evaporation to dryness is measured and calculated by the following formula. Oil agent active ingredient concentration (wt%) = (W3 / W2) x 100

(4) Draft cutoff property: Relative cutoff property was relatively evaluated based on the occurrence state of collective breakage at the time of draft cutoff, the occurrence of tow winding around the roller, and the frequency of device stoppage at the time of draft cutoff.

(5) Average fiber length of sliver: JIS L
1015A (staple diagram method) was applied.

(6) Sliver quality: Relative evaluation was made based on variations in fiber length, degree of sliver spots, and the like.

(7) Antibacterial property: The sample knitted fabric after washing 10 times was tested. This washed material knitted fabric was used to test bacteria (Staphylococcus aereus IFO12732
) Bouillon suspension was added, and in a closed container at 37 ° C,
The number of viable cells after culturing for 18 hours was measured, and the ratio of the number of reduced cells to the number of inoculated cells was calculated and expressed as a logarithm.

Example 1 Mordenite-type zeolite particles (SiO ₂ / Al ₂ O ₃ molar ratio of 17) were treated with an aqueous solution of silver nitrate to prepare silver-substituted antibacterial zeolite particles containing 7.5% by weight of silver ions. did.

The obtained silver-substituted zeolite particles were added in an amount of 5.0% by weight before the polymerization of Nylon 6 and polymerized in the usual manner to produce antibacterial master pellets.

Meanwhile, an auxiliary master pellet was prepared by adding 2.0% by weight of potassium iodide and 2.0% by weight of copper iodide to nylon 6.

To nylon 6 base pellets containing 0.23% by weight of titanium dioxide, 1.0% by weight of the above-mentioned antibacterial master pellets and 0.2% by weight of the above-mentioned auxiliary master pellets were added and mixed. Melt spinning was performed at a spinning temperature of 265 ° C.

Melt spinning, cooling and solidification, a plurality of unstretched sub-tows collected at 1300 m / min were aligned so that the final total fineness was about 400,000 denier, passed through an oil bath, and a rubber nip roller was used. After sandwiching it to control the amount of attached oil agent, it was stretched 2.7 times in steam. The oil solution was a water emulsion having the following concentration and composition.

Oil agent active ingredient concentration: 2.0% by weight Oil agent active ingredient composition: Lauryl alcohol phosphate potassium salt 80 parts by weight Other smoothing agents, antistatic agent components 20 parts by weight Silica having an average particle size of 15 mμ is contained. Amount (vs. oil solution): 0.1% by weight

Then, heat treatment was performed on a drum at 170 ° C.,
After applying the same surfactant component as in the oil agent, crimping was applied by a push-type crimping device. The obtained tow has a monofilament fineness of 1.5 denier, a strength of 7.0 g / d,
The elongation was 45% and the amount of attached oil was 0.7% by weight.

Next, this tow was transferred to OM Seisakusho Co., Ltd.
Using "TOW REACTOR" TR-II type manufactured by Tou, a total draw ratio of the tow stretching part is 1.1 times and a draw ratio of the main cut zone is 2.6.
The draft spinning was carried out under double the conditions. The stretch-breaking spinning device has a multi-stage stretching type in which the tow is stretched and stretched in six stages. The tow stretching zone (tow stretching section) has three stages, and then the main cutting zone. Is one step, and then
Two zones were sequentially arranged, in which two or more zones were cut in order to correct and cut 95% or more of the constituent tows to a fiber length of 20 cm or less.

Its drafting property is good, and it is possible to perform drafting spinning with high productivity without the occurrence of collective breakage and without stopping the drafting spinning device due to troubles such as static electricity generation and tow winding around the rubber roller. It was The obtained sliver has an average fiber length of 96 mm and a fiber length variation of 20 to 200 mm,
The quality was excellent without sliver spots.

Using the obtained nylon 6 sliver, 80
A count spun yarn was manufactured and further used as a knitted fabric. The antibacterial performance of the obtained knitted fabric was good as shown in Table 1.

[Comparative Example 1] A tow was produced under the same conditions as in Example 1 except that silica was not included in the oil solution to be adhered to the unstretched tow. In the same manner as in No. 1, an attempt was made to make a draft spin.

However, it was not possible to obtain a sliver in a stable state due to frequent occurrence of collective cutting and winding around the bottom roller during the draft. The shape of the sliver obtained in such a state was inferior.

[Comparative Example 2] A tow was produced under the same conditions as in Example 1 except that the nylon 6 base polymer of Example 1 was used as the polymer, and was subjected to the draft spinning.

Using the sliver thus obtained, spinning was carried out in the same manner as in Example 1 to produce a knitted fabric. As shown in Table 1, the obtained knitted fabric had remarkably poor antibacterial performance.

[Examples 2 and 3] As shown in Table 1, tows were produced under the same conditions as in Example 1 except that the content of silver zeolite and the content of copper iodide in the fibers were changed. Cutting was performed.

The obtained sliver was spun in the same manner as in Example 1 to produce a knitted fabric. As shown in Table 1, the physical properties of the obtained knitted fabric were good in terms of drafting property, sliver property, and antibacterial property.

Example 4 As shown in Table 1, a tow was produced under the same conditions as in Example 1 except that the silica content in the oil solution adhered to the unstretched tow was changed, and was subjected to the draft spin spinning. I went.

The obtained sliver was spun in the same manner as in Example 1 to produce a knitted fabric. As shown in Table 1, the physical properties of the obtained knitted fabric were good in terms of drafting property, sliver property, and antibacterial property.

[0098]

[Table 1]

[0099]

EFFECT OF THE INVENTION When the polyamide tow of the present invention is used for the draft-spinning, it is possible to significantly suppress the occurrence of collective breakage of the tow-constituting monofilaments and the occurrence of troubles such as static electricity and roller winding. It is possible to manufacture a polyamide sliver by stretch-spinning with high productivity.

Moreover, since this polyamide sliver has excellent antibacterial properties, bacteria such as Staphylococcus aureus, Escherichia coli, Bacillus subtilis, Pneumococcus, Pseudomonas aeruginosa, fungi such as Candida and Trichophyton. It is possible to obtain spun yarns and fiber products that exhibit excellent antibacterial performance against (mold) and after dyeing and post-processing.

Further, the antibacterial polyamide sliver obtained by stretch-spreading can easily have a fiber length as long as 90 mm or more, and can be made into a high quality and ultrafine antibacterial spun yarn.

Therefore, according to the present invention, textile products to be dyed or post-processed (such as lingerie, clothing items such as underwear, sock products such as stockings and socks, etc.)
The antibacterial polyamide sliver and spun yarn suitable for use can be industrially easily manufactured.

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Claims (4)

[Claims] 1. A fiber comprising an antibacterial polyamide fiber containing 0.01 to 20% by weight of silver-substituted antibacterial zeolite with respect to the fiber, wherein a surface active agent and inert fine particles are attached to the surface of the fiber, and An antibacterial polyamide tow for check-and-spin spinning, characterized in that the amount of the above-mentioned inert fine particles adhered is 0.01 to 1.0% by weight with respect to the fiber. 2. The antibacterial polyamide tow according to claim 1, wherein the antibacterial polyamide fiber contains 0.001 to 1.0% by weight of the sparingly water-soluble copper compound with respect to the fiber. 3. An antibacterial polyamide containing 0.01 to 20% by weight of a silver-substituted antibacterial zeolite is melt-spun,
The polyamide tow for draft spinning according to claim 1, wherein the polyamide tow for draft spinning is produced by oiling treatment with an oil solution containing a surfactant and inert fine particles after cooling and solidifying, and stretching. Manufacturing method. 4. A silver-substituted antibacterial zeolite is added at a stage before the polymerization of the polyamide is completed, and a sparingly water-soluble copper compound is added to the polyamide before spinning to obtain 0.01 to 20 with respect to the polyamide. 4. An antibacterial polyamide containing 1% by weight of silver-substituted antibacterial zeolite and 0.001 to 1.0% by weight of a sparingly water-soluble copper compound, and the antibacterial polyamide is melt-spun. Method for producing polyamide tow for stretch-and-spin.