JPH1053922A - Inorganic functional agent-containing polyester fiber and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce an inorganic functional agent-containing polyester fiber that has excellent functions, such as deodorizing and antimicrobial properties, and also excellent thermal resistance and dyeability, and is suitable for applications to clothing. SOLUTION: This inorganic functional agent-containing polyester fiber, which is preferably used for sheaths of composite fibers of core and sheath type, comprises (A) 40-95wt.% of polyester whose main repeating unit is ethylene terephthalate, and (B) 5-60wt.% of polyester whose main repeating unit is esters composed of 4-7C glycols and terephthalic acid as well as well as inorganic functional agents. This polyester fiber is produced by compounding a master batch composed of the polyester (B), as the base polymer, and inorganic functional agents with the polyester (A).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is excellent in functionality such as deodorant and antibacterial performance, and is excellent in heat resistance and dyeability, and can withstand ironing such as clothing use and can be dyed in a dark color. The present invention relates to an inorganic functionalizer-containing polyester fiber suitable for use in a field where is required, and a method for producing the same.

[0002]

2. Description of the Related Art Synthetic fibers, especially polyester fibers, are indispensable as clothing, filling materials, industrial materials, etc., in view of their excellent dimensional stability, weather resistance, mechanical properties, durability and the like. .

[0003] Depending on the intended use, these fibers are required to be further provided with special functions. For example, in applications that dislike bad odors, such as hospital futons, sheets, and carpets, there is a demand for a fiber product having a performance capable of eliminating bad odors as much as possible.

[0004] In our living environment, various bacteria and fungi are present, which propagate through the media and adhere to the human body and fibers, causing skin damage, degeneration and deterioration of the fibers. It can cause discomfort or give off odors. In particular, synthetic fibers are less likely to absorb sweat,
When the fibers are worn, microorganisms propagate on the skin, clothing, fillings, etc. to which sweat has adhered, causing a rot phenomenon, and producing a sweaty smell. Therefore, there is also a demand for the development of a cleaner and more hygienic synthetic fiber product that is cleaner, does not give off odor, and is more hygienic.

[0005] As described above, various methods have been proposed for imparting functionality such as deodorant and antibacterial properties to textiles. Among them, various methods have been proposed. The method of kneading fibers has been widely used because fibers having excellent functional durability can be obtained. For example, as a method for imparting deodorizing performance to fibers, a method has been proposed in which zinc silicate having an amorphous structure comprising zinc oxide and silicon dioxide is kneaded into polyester, polyamide, or the like (Japanese Patent Laid-Open No. 2-99606). .
In addition, as a method of imparting antibacterial performance to fibers, silver,
A method in which a metal compound such as copper or zinc is mixed into a polymer to form a fiber (Japanese Patent Application Laid-Open No. 54-147220);
A method in which zeolite-based solid particles ion-exchanged with copper ions are added to and mixed with an organic polymer (JP-A-59-13323).
No. 5) has been proposed.

However, inorganic functionalizing agents, especially deodorants, are generally generally porous fine particles,
Even if the drying conditions are strengthened, the absorption water and crystallization water form
Since 2% remains, when this is added to polyester and melt-spun, the polyester is hydrolyzed, the polymer is significantly deteriorated, and mechanical properties such as spinnability and high elongation are greatly reduced. Therefore, it is extremely difficult in practice to add an inorganic functionalizing agent to polyester, and it has been used by adding to a polymer other than polyester, mainly polyolefin.

For example, JP-A-6-228823 describes that an inorganic deodorant and an antibacterial agent are mixed with a polyolefin-based polymer and used as a sheath component of a core-sheath type composite fiber. . As described above, when an inorganic functional imparting agent is added to a polyolefin-based polymer, it exhibits excellent functionality (deodorizing and antibacterial effects) and also has excellent durability (washing resistance), Insufficient heat resistance, not able to withstand ironing, furthermore, when dyed, there is a problem that the phenomenon of white blur occurs, it is difficult to dye in a dark color, it is difficult to use for clothing Improper.

[0008]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, is excellent in functions such as deodorization and antibacterial performance, and is excellent in heat resistance and dyeing properties. An object of the present invention is to provide a polyester fiber containing an inorganic functional agent and a method for producing the same, which are suitable for use.

[0009]

Means for Solving the Problems According to the present invention and the like, as a result of repeated studies to solve such problems, as a base polymer, a masterbatch of an inorganic functionalizing agent using a polyester having few ester bonds was prepared, If this is mixed with a heat-resistant polyethylene terephthalate-based polyester and an inorganic function-imparting agent is added, hydrolysis does not occur even during melt spinning, and the spinnability is good and the mechanical properties are good. The present inventors have found that a polyester fiber containing an inorganic functionality imparting agent without any decrease can be obtained, and have completed the present invention.

That is, according to the present invention, a polyester (A) containing ethylene terephthalate as a main repeating unit
And a polyester (B) having an ester unit composed of a glycol having 4 to 7 carbon atoms and terephthalic acid as a main repeating unit in an amount of from 40 to 95% by weight, and an inorganic functionalizing agent was added. A polyester fiber comprising an inorganic functionalizing agent-containing polyester fiber and 20% by weight or more of an inorganic functionalizing agent, wherein the main repeating unit is an ester unit composed of a glycol having 4 to 7 carbon atoms and terephthalic acid. A method for producing a polyester fiber containing an inorganic functionalizing agent, comprising mixing a masterbatch obtained by kneading with B) with a polyester (A) having ethylene terephthalate as a main repeating unit and spinning the mixture. Is done.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The polyester (A) containing ethylene terephthalate as a main repeating unit used in the present invention is a polyester in which 85 mol% or more, preferably 90 mol% or more of the repeating units are composed of ethylene terephthalate units. Yes, other third components may be copolymerized as long as the object of the present invention is not impaired, and if necessary, matting agents, stabilizers, antioxidants, flame retardants, antistatic agents, fluorescent It may contain a whitening agent, a catalyst, a coloring inhibitor, a heat-resistant agent, a coloring agent and the like. Particularly, polyethylene terephthalate is preferably used.

The polyester (B) used in the present invention is a polyester having an ester unit composed of a glycol having 4 to 7 carbon atoms and terephthalic acid as a main repeating unit. In particular, polybutylene terephthalate is preferably used. .

Polyester (A) and polyester (B)
The former is 40 to 95% by weight, the latter is 5 to 6% by weight.
In particular, the former is preferably 50 to 90% by weight, and the latter is preferably 10 to 50% by weight. If the blending ratio of the latter (polyester (B)) is too small, hydrolysis at the time of melt spinning cannot be prevented, spinnability deteriorates, and mechanical properties such as high elongation deteriorate. It is. On the other hand, if the latter compounding ratio is too large, the effect corresponding to the compounding ratio cannot be obtained, and the cost increases, which is not preferable.

Further, as the inorganic function imparting agent to be added to the polyester fiber of the present invention, an inorganic fine particle type deodorant,
There are an antibacterial agent and a far-infrared radiator, and in particular, a deodorant, or a combination of a deodorant and an antibacterial agent is preferably used. in this case,
The content of the deodorant is 0.5% by weight or more, preferably 1 to
It is 10% by weight, more preferably 3 to 8% by weight. When the content of the deodorant is less than 0.5% by weight, a sufficient deodorizing effect cannot be obtained. Conversely, even if a large amount of the deodorant is added, the effect corresponding to the content cannot be expected. The cost is increased, and furthermore, the fiber performance and the spinning productivity are deteriorated. The content of the antibacterial agent is 0.3% by weight or more, preferably 0.5 to 3% by weight.
It is. In the case of the conjugate fiber described later, the content of the inorganic functionality imparting agent means the content with respect to the entire conjugate fiber.

As the function-imparting agent used in the present invention, an inorganic fine particle-based function-imparting agent conventionally used by being added to and mixed with fibers can be used. Above all,
As the deodorant, intimately mixed fine particles having a weight ratio of zinc oxide to silicon dioxide of 1: 3 to 3: 1, preferably 1: 2 to 2: 1 are preferably used. The intimately mixed fine particles
According to transmission electron microscope observation, the average primary particle diameter is 5 to 5.
30 nm, preferably 10 to 20 nm, and the average particle diameter of aggregation is 3 μm or less, preferably 1 μm or less. If the average agglomeration particle size exceeds 3 μm, the pack pressure increases during melt spinning and the yarn breaks, which is not preferable.

As the antibacterial agent, antibacterial fine particles containing silver ion as an active ingredient and having a particle diameter of 3 μm or less, preferably 1 μm or less are preferably used.

Such antibacterial fine particles are obtained by supporting silver ions on solid particles, and contain ions such as copper, zinc, mercury, tin, lead, bismuth, cadmium, chromium, and thallium in addition to the silver ions. It may be. As the solid particles, zirconium phosphate [NaZr2 (PO
4) Zirconiums such as 3), A-type zeolite,
X-type zeolite, Y-type zeolite, T-type zeolite, high silica zeolite, sodalite, mordenite, analcyme, clinoprolite, iabasite,
Inorganic ion exchangers such as zeolites such as lionite and apatites such as hydroxyapatite [Ca10 (PO4) 6 (OH) 2]. Among them, zirconium phosphate is preferable from the viewpoints of antibacterial properties, resistance to discoloration, resistance to washing, and elution of silver ions. The particle size of the antimicrobial fine particles is 3 μm or less, preferably 1 μm.
When the thickness exceeds 3 μm, the pack pressure increases during melt spinning or the yarn breaks, which is not preferable.

In order to produce the polyester fiber of the present invention, first, a polyester (B) having an ester unit composed of a glycol having 4 to 7 carbon atoms and terephthalic acid as a main repeating unit has an inorganic functionality of 20% by weight or more. A masterbatch is prepared by kneading the imparting agent, and the masterbatch is mixed with the polyester (A) having ethylene terephthalate as a main repeating unit, melt-spun, stretched and heat-treated by a conventional method.

In general, when an inorganic function-imparting agent is added directly to a fiber-forming polymer, secondary dispersibility is poor and secondary agglomeration is likely to occur, which causes an increase in pack pressure and melt breakage during melt spinning. In the above, a master batch containing at least 20% by weight of an inorganic functionalizing agent is prepared,
The masterbatch is diluted with a polyester (A) having ethylene terephthalate as a main repeating unit.

In this case, the base polymer of the masterbatch is preferably the same as the polyester (A) having ethylene terephthalate as a main repeating unit which forms fibers, but a polyester having ethylene terephthalate as a main repeating unit is preferably used. Then, the inorganic functionalizing agent, which often contains a large amount of water in the form of adsorption water and crystallization water, is melt-kneaded with the base polymer at a high concentration, so that hydrolysis occurs and a satisfactory master batch is obtained. I can't. Even if a masterbatch is obtained somehow, if it is added to polyester and melt-spun, the polyester will be further hydrolyzed and the polymer will be significantly degraded, resulting in mechanical properties such as spinnability and high elongation. Greatly decreases.

The main repeating unit is an ester unit which is structurally similar to the polyester (A), but has a smaller number of ester bonds than the polyester (A), and is composed of a glycol having 4 to 7 carbon atoms and terephthalic acid. When polyester (B) is used as a base polymer of a masterbatch, hydrolysis can be greatly reduced, and deterioration of mechanical properties such as poor spinnability and high elongation during melt spinning is minimized. It succeeded in stopping it difficult.

Further, in the polyester fiber of the present invention, the combined use of the polyester (A) and the polyester (B) improves the gas permeability of the entire polyester fiber. Is improved.

The polyester containing an inorganic functional agent of the present invention may form a fiber by itself or may be a part of a conjugate fiber. As the form of the composite fiber,
Examples include Site {Visite} and a sheath-core type. In the case of a sheath-core type, the core may be eccentric.

Here, in the polyester fiber of the present invention, when a function-imparting agent is kneaded into the entire yarn cross section, the function-imparting agent at the center of the yarn exerts its function more fully than the surface layer. It may not be possible, and the number of breaks during melt spinning may be slightly increased, so that spinning properties may not be sufficient. Therefore, a core component composed of a thermoplastic polymer having a melting point of 200 ° C. or higher, an ester composed of 40 to 95% by weight of a polyester (A) having ethylene terephthalate as a main repeating unit, and a glycol having 4 to 7 carbon atoms and terephthalic acid By blending 5 to 60% by weight of a polyester (B) having a repeating unit as a main repeating unit, and forming a core-sheath type composite fiber comprising a sheath component to which an inorganic functionality imparting agent is added, the functionality imparting agent is composited. Since the fibers are concentrated on the surface layer, the effects (eg, deodorant and antibacterial effects) are effectively exhibited, and the spinnability is also improved.

In this case, the melting point used as the core component is 2
Preferred examples of the thermoplastic polymer of 00 ° C. or higher include:
Examples thereof include polyester containing polyethylene terephthalate or polybutylene terephthalate as a main component, nylon 6, nylon 66, and polyamide containing meta-xylene diamine nylon as a main component. Melting point is 20
A thermoplastic polymer having a temperature lower than 0 ° C. is not suitable because of insufficient heat resistance.

The composition ratio of the core component and the sheath component is preferably such that the ratio of the core component / the sheath component (weight ratio) is 30/70 to 70/30, particularly 45/55 to 55/45. Is preferred. If it exceeds 70/30, the polymer constituting the sheath component tends to be broken, and the spinning productivity is reduced.
On the other hand, if the ratio is less than 30/70, the original fiber performance of the core component polymer decreases.

The core-sheath type composite fiber of the present invention is prepared by melt-spinning the core-sheath type composite fiber using the above-mentioned core component and sheath component by a commonly used core-sheath type composite spinning apparatus, and then drawing and heat-treating by a conventional method. Can be manufactured.

[0028] The polyester fiber containing an inorganic functionalizing agent of the present invention is sufficiently resistant to ironing since the inorganic functionalizing agent is mixed with polyester having better heat resistance and dyeability than conventional polyolefin-based polymers. It can be dyed in dark colors. In particular, in the polyester fiber of the present invention, the dyeability is significantly improved,
A phenomenon that cannot be explained simply by using a polyester having good dyeing properties is observed, but this phenomenon is caused by the fact that about 1% of the porous fine particles contained in the polyester are adsorbed by the inorganic function-imparting agent. It is presumed that when adsorbed water or water of crystallization is released to the outside, fine cracks are formed in the polyester, and the dye penetrates into the inside through the cracks.

Further, such a change in the internal structure has an advantage that, for example, an external odor is easily adsorbed, and a deodorant is apt to act.

Further, in the polyester fiber of the present invention, since the inorganic function imparting agent is kneaded into the fiber, it does not fall off by washing and has excellent washing resistance.

In particular, in the case of a core-sheath type conjugate fiber, the effect (for example, deodorant and antibacterial effect) is effectively exerted since the function-imparting agent is concentrated on the surface layer of the conjugate fiber, and It is preferable because spinnability is also improved.

The core-sheath type deodorant antibacterial composite fiber of the present invention can be used as a woven or knitted product in the form of long fiber or spun yarn, or as a nonwoven fabric, wadding, paper or the like in the form of short fiber. And the like where functionalities are required. Especially,
Since it has excellent heat resistance and dyeability, it can be suitably used for clothing.

[0033]

The present invention will be described in more detail with reference to the following examples. The performance evaluation in the examples was measured according to the following method.

(1) Antibacterial activity A sample is placed on an agar medium inoculated with Staphylococcus aureus,
The bacteria were cultured at 7 ° C. for 24 hours, and the antibacterial effect was determined by the presence or absence of growth of Staphylococcus aureus around the sample. (Judgment) 〇: No growth of bacteria around the sample was observed, and halos were generated. C: Some growth of bacteria is observed around the sample, but halo occurs. ×: Bacterial growth was observed around the sample, and no halo was generated.

(2) Deodorizing property Using the apparatus shown in FIG. 1, the ammonia concentration was measured to determine the deodorizing rate. That is, the ammonia sensor 1
[AE-235; Toa Denpa Co., Ltd.] and Ion Meter 3
[IM-IE; manufactured by Toa Denpa Co., Ltd.] and the recorder 4 were connected, and the ammonia sensor 1 was attached to the sealed container 5.
Ammonia gas was injected into the container 5 with a syringe so as to have a concentration of 500 ppm. Thereafter, the measurement sample 2 was set in the container 5 and left for 2 hours, and then the ammonia concentration in the container 5 was measured. The rate of decrease in the ammonia concentration was defined as the deodorization rate.

(3) Heat resistance From a measurement sample cut to a length of 76 mm, a diameter of about 5 cm
Sliver of 150 ℃ to 180 ℃, 5
Heat treatment was performed for 5 minutes each at a pitch of ° C., and the sliver pullout strength after the heat treatment at each temperature was measured and used as an index of heat resistance. A large value means that the fibers are fused, indicating that the heat resistance is inferior.
FIG. 2 shows an example in which the test results are represented by a graph.

(4) Stainability A measurement sample cut into a length of 76 mm was mixed with a standard sample (polyethylene terephthalate fiber, 3 de × 76 mm) in the same bath, and a dispersion dye “Terrasil Polyester Blue” (manufactured by Nippon Ciba Geigy) was used. Use, 10 minutes from normal temperature to 20 minutes
The temperature was raised to 0 ° C., and the mixture was subjected to boiling dyeing at 100 ° C. for 70 minutes. Nippon Denshoku Industries Co., Ltd. photoelectric colorimeter (SZ-II)
80) L of the measurement sample and the standard sample stained using
The a and b values were measured, and the dyeability was determined based on the color shift (color shift) with respect to the standard sample. That is, the light and shade of the dyeing
The value is expressed as a difference ΔL. If the brightness of the standard sample is low (that is, if it is deeply dyed), it is “+”; if it is high (that is, it is lightly dyed), it is “−”. Expressed the size.

(5) Spinnability The case where no thread break occurs at the time of melt spinning is indicated by ○, the case where breakage occurs occasionally is indicated by Δ, and the case where spinning occurs frequently and spinning is impossible is indicated by x.

Examples 1 to 5, Comparative Example 1 A silver-based inorganic antibacterial agent in which silver ions and an inorganic ion exchanger (zirconium phosphate) are bonded [Novalon AG-300; manufactured by Toa Gosei Chemical Industry Co., Ltd. An average particle diameter of 1 μm] is kneaded with polybutylene terephthalate (polyester (B)) having an intrinsic viscosity of 0.88 using a twin screw extruder manufactured by Nippon Steel Works to produce a master batch of NOVALON AG-300. did. In this case, the antibacterial agent concentration of the masterbatch is such that when the masterbatch is mixed with polyethylene terephthalate (polyester (A)), the antibacterial agent content is 5% by weight, and the blending ratio of polybutylene terephthalate is as shown in Table 1. It was adjusted to become.

This master batch was treated with an intrinsic viscosity of 0.64
Polyethylene terephthalate (polyester (A))
The mixture was melt-spun from a spinneret having a nozzle hole diameter of 0.3 mm and 450 holes at a spinning temperature of 295 ° C., a discharge rate of 400 g / min, and a take-up speed of 900 m / min.

The obtained undrawn yarn is drawn 2.5 times in hot water at 75 ° C., then heat-treated at 125 ° C. for about 20 minutes, and then cut into a length of 76 mm to obtain about 4 denier. An antibacterial polyester fiber was obtained.

Table 1 shows the evaluation results of the obtained fibers.
In addition, heat resistance showed sliver pullout strength when heat-treated at 180 ° C.

[0043]

[Table 1]

As is clear from the results in Table 1, when the blending ratio of polybutylene terephthalate is less than 5% by weight (Comparative Example 1), hydrolysis at the time of melt spinning cannot be prevented and spinnability deteriorates. did. When the blending ratio of polybutylene terephthalate is 5 to 60% by weight (Examples 1 to 5),
Good results were obtained.

Comparative Example 2 In Example 1, when an antibacterial agent was directly added to polyethylene terephthalate without using the master batch method, hydrolysis occurred during melt spinning, and the melt viscosity of the polymer was significantly reduced. Threads occurred frequently and satisfactory spinning was not possible.

Examples 6 to 9, Comparative Example 3 Closely mixed fine particles having a mixing ratio of zinc oxide and silicon dioxide of 2: 1 by weight [SZ-100; manufactured by Suzuki Sogyo Co., Ltd., average primary particle diameter 15 nm, aggregation average particle diameter 1 μm]
The polyester (polyester (B)) shown in Table 2 was kneaded with a twin screw kneading extruder manufactured by Nippon Steel Works so that the deodorant content was 30% by weight to prepare a master batch of SZ-100.

The masterbatch was mixed with a polyethylene terephthalate (polyester) having an intrinsic viscosity of 0.64 so that the content of the deodorant was 5% by weight and the blending ratio of the masterbatch base polymer was 15% by weight based on the entire composite fibers. (A)) to obtain a sheath component constituting polymer.

On the other hand, as the core component constituting polymer, polyethylene terephthalate having an intrinsic viscosity of 0.64 was used.
Along with the polymer constituting the sheath component, a spinning temperature (core / sheath = 300 ° C./280° C.) and a discharge amount of 414 g from a core-sheath type composite spinning die having a nozzle hole diameter of 0.5 mm and 450 holes at a ratio of 50:50. / Min at a take-up speed of 1150 m / min.

The obtained undrawn yarn is drawn 2.5 times in hot water at 70 ° C., then heat-treated at 125 ° C. for about 20 minutes, and then cut into a length of 76 mm to obtain about 3 denier. A core-sheath type deodorant conjugate fiber was obtained.

Table 2 shows the evaluation results of the obtained fibers.
The heat resistance indicates the sliver pullout strength when heat-treated at 180 ° C., and the result of the heat resistance test of the conjugate fiber of Example 5 was as indicated by ● in the graph of FIG.

[0051]

[Table 2]

As is clear from the results shown in Table 2, the core-sheath of the present invention using a polyester having an ester unit composed mainly of a glycol having 4 to 7 carbon atoms and terephthalic acid as a main repeating unit as a base polymer of a masterbatch. The type composite fibers (Examples 6 to 9) showed good results,
When polyethylene terephthalate was used as the base polymer of the masterbatch (Comparative Example 3), hydrolysis occurred during melt spinning, and the melt viscosity of the polymer was remarkably reduced, frequent breakage occurred, and satisfactory spinning was not possible. Was.

[Comparative Example 4] In Example 6, when a deodorant was directly added to polyethylene terephthalate without using the master batch method, hydrolysis occurred during melt spinning, and the melt viscosity of the polymer was significantly reduced. Threads occurred frequently and satisfactory spinning was not possible.

Comparative Example 5 In Example 6, a polypropylene-based polymer [TG-810; manufactured by Showa Denko KK, melt index 30, melting point 150 ° C.] was used as the base polymer of the masterbatch. By mixing with the system polymer TG-810,
A core-in-sheath type conjugate fiber was obtained in the same manner as in Example 5, except that a sheath component constituting polymer was used. The results are as shown in Table 2, and were inferior in heat resistance and dyeability. In addition, the result of the heat resistance test was as shown by (triangle | delta) in the graph of FIG.

[Examples 10 to 14, Comparative Example 6] Example 6
In, variously change the deodorant concentration of the master batch,
Except that the deodorant content was changed to 5% by weight based on the entire conjugate fiber, and the mixing ratio of polyethylene terephthalate (polyester (A)) and polybutylene terephthalate (polyester (B)) became the value shown in Table 3. In the same manner as in Example 6, a core-sheath composite fiber was obtained. Table 3 shows the evaluation results of the obtained composite fibers.

[0056]

[Table 3]

As is evident from the results in Table 3, when the blending ratio of polybutylene terephthalate is less than 5% by weight (Comparative Example 6), hydrolysis during melt spinning cannot be prevented and spinnability deteriorates. did. When the blending ratio of polybutylene terephthalate is 5 to 60% by weight (Examples 10 to 14)
In addition, good results were obtained.

[0058]

According to the present invention, the inorganic functionality imparting agent of the porous fine particles which has conventionally been difficult to be added to the polyester due to the problem of hydrolysis is replaced with the masterbatch base polymer and the specific polyester. By doing so, it is made possible to add to polyester, and since it is mixed with an inorganic functionalizing agent in polyester that is more heat resistant and dyeable than conventional polyolefin polymers, it can withstand ironing sufficiently. It can be dyed in a dark color and can be suitably used for clothing.

Further, in the polyester fiber of the present invention, since the inorganic function imparting agent is kneaded into the fiber, it does not fall off by washing and has excellent washing resistance.

In particular, in the case of a core-sheath type conjugate fiber, the effect (for example, deodorant and antibacterial effect) is effectively exerted since the function-imparting agent is concentrated on the surface layer of the conjugate fiber, and The spinnability also improves.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a deodorizing performance measuring device used for evaluating the fiber of the present invention.

FIG. 2 is a graph showing a comparison between the heat resistance test results of the fibers of the present invention and conventional fibers.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sensor 2 Measurement sample 3 Ion meter 4 Recorder 5 Container

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Reference number in the agency FI Technical display location D01F 8/14 D01F 8/14 B

Claims (12)

[Claims] 1. A polyester (A) containing ethylene terephthalate as a main repeating unit in an amount of 40 to 95% by weight,
Inorganic function characterized by blending 5 to 60% by weight of a polyester (B) having an ester unit composed of a glycol having 4 to 7 carbon atoms and terephthalic acid as a main repeating unit, and adding an inorganic functionalizing agent. Polyester fiber containing a property imparting agent. 2. A core component comprising a thermoplastic polymer having a melting point of 200 ° C. or higher, 40 to 95% by weight of a polyester (A) having ethylene terephthalate as a main repeating unit, glycol having 4 to 7 carbon atoms and terephthalic acid. Characterized in that it is a core-in-sheath conjugate fiber comprising a polyester component (B) having an ester unit as a main repeating unit in an amount of 5 to 60% by weight and a sheath component to which an inorganic functionalizing agent is added. Polyester fiber containing a function-imparting agent. 3. The polyester fiber containing an inorganic functionalizing agent according to claim 1, wherein the inorganic functionalizing agent is a deodorant, and its content relative to the whole fiber is 0.5% by weight or more. 4. The method according to claim 1, wherein the inorganic function-imparting agent is a deodorant and an antibacterial agent, and the content thereof is 0.5% by weight or more and 0.3% by weight or more based on the whole fiber. Item 3. An inorganic functionalizer-containing polyester fiber according to item 1 or 2. 5. The deodorant is intimately mixed fine particles composed of zinc oxide and silicon dioxide, and the mixing ratio is 1: 3 to
The inorganic functional-agent-containing polyester fiber according to claim 3 or 4, wherein the mixed particles have an average primary particle diameter of 5 to 30 nm and an aggregated average particle diameter of 3 µm or less. 6. The weight ratio between the core component and the sheath component is 30:70.
The polyester fiber containing an inorganic functionalizing agent according to any one of claims 2 to 5, wherein the ratio is from 70 to 30:30. 7. A masterbatch obtained by kneading 20% by weight or more of an inorganic functionalizing agent with a polyester (B) having an ester unit composed of a glycol having 4 to 7 carbon atoms and terephthalic acid as a main repeating unit. Is mixed with a polyester (A) having ethylene terephthalate as a main repeating unit, followed by melt-spinning, to produce a polyester fiber containing an inorganic functionalizer. 8. A polyester (B) having a thermoplastic polymer having a melting point of 200 ° C. or more as a core component and an ester unit composed of a glycol having 4 to 7 carbon atoms and terephthalic acid as a main repeating unit, has a content of 20% by weight or more. Polyester (A) having a masterbatch obtained by kneading an inorganic functionality imparting agent and having ethylene terephthalate as a main repeating unit
A method for producing a polyester fiber containing an inorganic function-imparting agent, wherein the mixture is melt-spun to obtain a core-sheath type composite fiber. 9. The inorganic functionality according to claim 7, wherein the inorganic functionality-imparting agent is a deodorant, and the masterbatch is mixed so that its content with respect to the whole fiber is 0.5% by weight or more. A method for producing an imparting agent-containing polyester fiber. 10. The inorganic function-imparting agent is a deodorant and an antibacterial agent, the content of which is 0.5% by weight or more of the inorganic deodorant and 0.3% by weight or more of the antibacterial agent based on the whole fiber. The method for producing a polyester fiber containing an inorganic functional agent according to claim 8 or 9, wherein a master batch is mixed with the polyester fiber. 11. The deodorant is intimately mixed fine particles of zinc oxide and silicon dioxide, and the mixing ratio is 1: 3.
３3: 1, the average primary particle diameter of the mixed particles is 5 to 30 nm,
The aggregation average particle diameter is 3 μm or less.
A method for producing a polyester fiber containing an inorganic functional agent according to the above. 12. The weight ratio of the core component and the sheath component is 30: 7.
12. The method according to claim 8, wherein the ratio is 0 to 70:30.
The method for producing a polyester fiber containing an inorganic functionality-imparting agent according to the above item.