JP2003073922A - Antibacterial polyamide fiber excellent in dyeability and washing resistance, antibacterial polyamide crimped yarn, antibacterial polyamide woven/knitted fabric, and method for producing the antibacterial polyamide fiber - Google Patents

Antibacterial polyamide fiber excellent in dyeability and washing resistance, antibacterial polyamide crimped yarn, antibacterial polyamide woven/knitted fabric, and method for producing the antibacterial polyamide fiber

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Publication number
JP2003073922A
JP2003073922A JP2001263898A JP2001263898A JP2003073922A JP 2003073922 A JP2003073922 A JP 2003073922A JP 2001263898 A JP2001263898 A JP 2001263898A JP 2001263898 A JP2001263898 A JP 2001263898A JP 2003073922 A JP2003073922 A JP 2003073922A
Authority
JP
Japan
Prior art keywords
antibacterial
fiber
antibacterial polyamide
polyamide
yarn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2001263898A
Other languages
Japanese (ja)
Inventor
Masaki Nishimura
雅樹 西村
Seiji Abe
清二 阿部
Hisao Yamamoto
尚生 山本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unitika Fibers Ltd
Original Assignee
Unitika Fibers Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unitika Fibers Ltd filed Critical Unitika Fibers Ltd
Priority to JP2001263898A priority Critical patent/JP2003073922A/en
Publication of JP2003073922A publication Critical patent/JP2003073922A/en
Pending legal-status Critical Current

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  • Knitting Of Fabric (AREA)
  • Artificial Filaments (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Woven Fabrics (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an antibacterial polyamide fiber capable of exhibiting good antibacterial properties, capable of giving a small change of color (discoloration) even when treated with an alkali, capable of giving small color unevenness even when dyed, and capable of giving extremely small decrease of the antibacterial properties after washed so as to have excellent washing resistance, to provide antibacterial polyamide crimped yarn, and to provide a method for producing the fiber. SOLUTION: The antibacterial polyamide fiber is made of a polyamide resin which contains 0.1-5.0 wt.% of zinc oxide fine particles which comprise primary particles having an average particle diameter of 0.05-0.5 μm and the secondary particles having an average particle diameter of 1.0-4.0 μm and are coated and treated with a coupling agent, wherein the fiber has a color difference (Δn) of <=2.0 which is the difference of the color value measured before alkaline treatment from that measured after the alkaline treatment and a bacteriostatic activity of >=2.2 which is measured after conducting washing 50 times.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、抗菌剤を含有する
ポリアミド樹脂からなる繊維であり、アルカリ処理によ
る変色(着色)と染色によるバラツキが少なく、かつ耐
洗濯性に優れた抗菌性ポリアミド繊維及びその製造方法
に関するものである。
TECHNICAL FIELD The present invention relates to an antibacterial polyamide fiber comprising a polyamide resin containing an antibacterial agent, which has less discoloration (coloring) due to alkali treatment and variation due to dyeing and which is excellent in washing resistance. The present invention relates to a manufacturing method thereof.

【0002】[0002]

【従来の技術】ナイロン6をはじめとするポリアミド繊
維等の合成繊維に抗菌性を有する粉体を含有させた抗菌
性繊維は、これまでに数多く提案されている。中でも、
銀系の無機物質は抗菌剤として広く使用されており、銀
イオンを担持させたリン酸塩系抗菌剤、銀イオンを担持
させたゼオライト系抗菌剤、銀イオンを担持させたヒド
ロキシアパタイト焼成物系抗菌剤等が使用されている。
2. Description of the Related Art So far, many antibacterial fibers have been proposed in which a synthetic fiber such as polyamide fiber such as nylon 6 contains a powder having antibacterial properties. Above all,
Silver-based inorganic substances are widely used as antibacterial agents, such as phosphate-based antibacterial agents supporting silver ions, zeolite-based antibacterial agents supporting silver ions, and hydroxyapatite calcined materials supporting silver ions. Antibacterial agents are used.

【0003】このような銀系の無機抗菌剤を含有する繊
維は、抗菌性が良好でその耐久性も優れているが、製織
性を向上させるために付与した糊剤を染色前の工程で洗
い流すためにアルカリ処理を行うと、抗菌成分である銀
の酸化が起こって変色(着色)し、その結果、抗菌性が
低下するので、アルカリ処理を行うような用途には使用
し難いという欠点があった。
Fibers containing such a silver-based inorganic antibacterial agent have good antibacterial properties and excellent durability, but the sizing agent applied to improve weaving properties is washed away in the step before dyeing. Therefore, the alkali treatment causes oxidation of silver, which is an antibacterial component, resulting in discoloration (coloring), and as a result, the antibacterial property decreases, which is a drawback that it is difficult to use in applications such as alkali treatment. It was

【0004】そこで、変色を防止し、繊維の白度や鮮明
性を向上させるために、過炭酸ナトリウムや次亜塩素酸
ナトリウム、あるいはメルカプト基を持たないアゾール
化合物などの変色防止剤で処理した抗菌性繊維が、特開
平4−50376号公報や特開平6−264360号公
報、特開平6−272173号公報に提案されている。
しかしながら、これらの繊維は、変色防止剤による処理
のみではアルカリ処理を行ったときの変色(着色)を十
分に回避することができず、処理も煩雑であり、衣料用
などの白度や鮮明性が要求される用途には使用し難いと
いう問題があった。
Therefore, in order to prevent discoloration and improve the whiteness and sharpness of the fiber, antibacterial treated with a discoloration inhibitor such as sodium percarbonate, sodium hypochlorite, or an azole compound having no mercapto group. Functional fibers have been proposed in JP-A-4-50376, JP-A-6-264360, and JP-A-6-272173.
However, these fibers cannot sufficiently avoid discoloration (coloring) when subjected to alkali treatment only by treatment with an anti-tarnish agent, and the treatment is complicated, and whiteness and sharpness for clothing etc. However, there is a problem that it is difficult to use for the applications that require.

【0005】これらの問題を解決するために、本発明者
らは、特開平11−293521号公報において、粒子
の表面をカップリング剤で被覆処理した酸化亜鉛微粒子
を含有させることで、アルカリ処理をおこなっても変色
(着色)が少ない抗菌性ポリアミド繊維を提案した。こ
の繊維は、アルカリ処理後に着色が少ない、優れた抗菌
性繊維である。しかしながら、この繊維の製造において
は、紡糸中に抗菌剤が繊維表面にブリードアウトしてく
る傾向があり、得られる繊維中の抗菌剤の分布が不均一
(特に表面に局在したもの)となることがあった。この
ため多洗後には繊維表面から抗菌剤が脱落し、抗菌性能
の持続性が十分でないという問題点があった。
In order to solve these problems, the present inventors disclosed in JP-A No. 11-293521 that the surface of the particles was treated with a coupling agent to contain zinc oxide fine particles, and the alkali treatment was performed. We proposed an antibacterial polyamide fiber with little discoloration (coloring) even if it is performed. This fiber is an excellent antibacterial fiber with little coloring after alkali treatment. However, in the production of this fiber, the antibacterial agent tends to bleed out to the fiber surface during spinning, resulting in uneven distribution of the antibacterial agent in the obtained fiber (particularly localized on the surface). There was an occasion. For this reason, there is a problem in that the antibacterial agent falls off from the surface of the fiber after the multi-washing, and the antibacterial performance is not sufficiently sustained.

【0006】さらに、本発明者らは、特願2000−5
1416号において、粒子の表面をカップリング剤で被
覆処理した酸化亜鉛微粒子を含有させることで、アルカ
リ処理をおこなっても変色(着色)が少なく、かつ多洗
後に繊維表面から抗菌剤の脱落が少ない抗菌性ポリアミ
ド繊維を提案した。この繊維は、アルカリ処理後に着色
が少なく、耐久性に優れた抗菌性繊維である。
[0006] Furthermore, the inventors of the present invention have filed Japanese Patent Application No. 2000-5.
No. 1416, by containing zinc oxide fine particles whose surface is coated with a coupling agent, the discoloration (coloring) is small even if alkali treatment is performed, and the antibacterial agent does not drop off from the fiber surface after a large number of washes. An antibacterial polyamide fiber was proposed. This fiber is an antibacterial fiber that is less colored after alkali treatment and has excellent durability.

【0007】しかしながら、この繊維においては、粒径
の大きい抗菌剤が存在すると紡糸工程中のフィルターに
捕捉され、得られる繊維中の抗菌剤濃度がフィラメント
の長手方向で不均一となり、これによりフィラメントの
光沢感が不均一となり、フィラメント間の染色性が不均
一になるという問題点があった。さらには、フィルター
に補足された抗菌剤が目詰まりを起こし濾過圧が上昇す
るという操業上の問題も生じる。そこで、粒径の大きい
抗菌剤を通過させるために、紡糸工程中ファイルターの
平均通過粒径を大きくしたとすると、単糸繊度が4dt
ex以下の繊維の紡糸では、特に紡糸工程において糸切
れが多発するという問題点があった。
However, in this fiber, when an antibacterial agent having a large particle size is present, it is captured by the filter during the spinning process, and the concentration of the antibacterial agent in the obtained fiber becomes non-uniform in the longitudinal direction of the filament. There is a problem that the glossy feeling becomes non-uniform and the dyeability between filaments becomes non-uniform. Further, there is a problem in operation that the antibacterial agent trapped in the filter causes clogging and the filtration pressure rises. Therefore, if the average passing particle size of the filter is increased during the spinning process in order to pass the antibacterial agent having a large particle size, the single yarn fineness is 4 dt.
In the spinning of fibers having an ex or less, there is a problem that yarn breakage frequently occurs especially in the spinning process.

【0008】[0008]

【発明が解決しようとする課題】本発明は、上記の問題
点を解決し、良好な抗菌性と均一な染色性を有し、アル
カリ処理を行っても変色(着色)が少なく、かつ洗濯後
の抗菌性の低下が著しく少ない耐洗濯性に優れた抗菌性
ポリアミド繊維及びその製造方法を提供することを技術
的な課題とするものである。
DISCLOSURE OF THE INVENTION The present invention solves the above problems, has good antibacterial properties and uniform dyeability, has little discoloration (coloring) even when subjected to alkali treatment, and after washing. It is a technical object to provide an antibacterial polyamide fiber excellent in washing resistance, in which the deterioration of the antibacterial property is extremely small, and a method for producing the same.

【0009】[0009]

【課題を解決するための手段】本発明者らは、上記の課
題を解決するために鋭意検討した結果、本発明に到達し
た。すなわち、本発明は次の(1)〜(2)を要旨とす
るものである。 (1)一次粒子の平均粒径が0.05〜0.5μm、二
次粒子の平均粒径が1.0〜4.0μmである表面をカ
ップリング剤で被覆処理した酸化亜鉛微粒子を0.1〜
5.0質量%含有しているポリアミド樹脂からなり、ア
ルカリ処理前後の色差ΔEが2.0以内であり、かつ5
0洗後の静菌活性値が2.2以上であることを特徴とす
る抗菌性ポリアミド繊維。 (2)一次粒子の平均粒径が0.05〜0.5μm、二
次粒子の平均粒径が1.0〜3.0μmである表面をカ
ップリング剤で被覆処理した酸化亜鉛微粒子を0.1〜
5.0質量%含有するポリアミド樹脂チップを水分率が
0.05〜0.2質量%となるように調整した後に溶融
紡糸し、ノズル面より400mm以内で固化させることを
特徴とする(1)記載の抗菌性ポリアミド繊維の製造方
法。
The present inventors have arrived at the present invention as a result of extensive studies to solve the above problems. That is, the present invention is summarized in the following (1) and (2). (1) Zinc oxide fine particles obtained by coating the surfaces of the primary particles having an average particle diameter of 0.05 to 0.5 μm and the secondary particles having an average particle diameter of 1.0 to 4.0 μm with a coupling agent are used. 1 to
It is made of a polyamide resin containing 5.0% by mass, the color difference ΔE before and after the alkali treatment is within 2.0, and 5
An antibacterial polyamide fiber having a bacteriostatic activity value of 2.2 or more after 0 washing. (2) Zinc oxide fine particles whose surfaces have an average particle diameter of 0.05 to 0.5 μm and an average particle diameter of secondary particles of 1.0 to 3.0 μm are coated with a coupling agent. 1 to
A polyamide resin chip containing 5.0% by mass is adjusted to have a water content of 0.05 to 0.2% by mass, melt-spun, and solidified within 400 mm from the nozzle surface (1). A method for producing the antibacterial polyamide fiber described.

【0010】[0010]

【発明の実施の形態】以下、本発明について詳細に説明
する。本発明の繊維を構成するポリアミドとしては、ナ
イロン6、ナイロン66、ナイロン69、ナイロン46
等の単独あるいはこれらの共重合体、またはブレンドし
たもの等が挙げられる。そして、本発明の効果を損なわ
ない範囲であれば、艶消剤、改質剤、制電剤、顔料等を
含んだものでもよい。
BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. As the polyamide constituting the fiber of the present invention, nylon 6, nylon 66, nylon 69, nylon 46
And the like, or a copolymer thereof, or a blend thereof. Further, as long as the effect of the present invention is not impaired, a matting agent, a modifier, an antistatic agent, a pigment, etc. may be contained.

【0011】本発明の繊維に含有させる抗菌剤は、粒子
の表面をカップリング剤で被覆処理した酸化亜鉛微粒子
である。酸化亜鉛微粒子は、紫外線吸収や脱臭という作
用に加えて、殺菌、抗菌作用を有しているが、光触媒活
性を有するために、樹脂中に含有させたときに光劣化を
生じ、得られる繊維の物性が劣ったものになるという欠
点がある。
The antibacterial agent contained in the fiber of the present invention is zinc oxide fine particles whose surface is coated with a coupling agent. Zinc oxide fine particles have a bactericidal and antibacterial action in addition to the action of absorbing ultraviolet rays and deodorizing, but since they have photocatalytic activity, they cause photodegradation when contained in a resin and It has the drawback of having poor physical properties.

【0012】すなわち、酸化亜鉛微粒子の光触媒活性は
粒子表面における反応であり、粒子の表面を処理するこ
とにより活性を抑制しようとする試みは従来よりなされ
ている。例えば、酸素や水との接触を断つためのマイク
ロカプセル化表面処理がなされていたが、この処理を施
した酸化亜鉛微粒子は、光学的には酸化亜鉛の性質を有
しているが、化学的には酸化亜鉛の性質を失うという問
題があった。
That is, the photocatalytic activity of zinc oxide fine particles is a reaction on the particle surface, and attempts have been made to suppress the activity by treating the particle surface. For example, microencapsulation surface treatment was performed to cut off contact with oxygen and water.The zinc oxide fine particles subjected to this treatment have the optical properties of zinc oxide, but are chemically Had the problem of losing the properties of zinc oxide.

【0013】そこで、本発明においては、酸化亜鉛微粒
子の欠点である光触媒活性を抑制し、かつ光学的にも化
学的にも酸化亜鉛の性質を有するようにするために、粒
子の表面をカップリング剤で被覆処理したものを用い
る。
Therefore, in the present invention, in order to suppress the photocatalytic activity, which is a drawback of zinc oxide fine particles, and to have the properties of zinc oxide both optically and chemically, the surface of the particles is coupled. The one coated with the agent is used.

【0014】カップリング剤としては、特に限定される
ものではないが、シランカップリング剤が好ましく、例
えば、信越化学社製のシランカップリング剤KBM−4
03、KBM−503が挙げられる。
The coupling agent is not particularly limited, but a silane coupling agent is preferable, for example, a silane coupling agent KBM-4 manufactured by Shin-Etsu Chemical Co., Ltd.
03, KBM-503.

【0015】また、シランカップリング剤以外のカップ
リング剤としては、チタン系、アルミニウム系、ジルコ
ニウム系、ジルコアルミネート系等のカップリング剤が
挙げられる。
Examples of coupling agents other than silane coupling agents include titanium-based, aluminum-based, zirconium-based, and zircoaluminate-based coupling agents.

【0016】そして、カップリング剤の被覆量は、酸化
亜鉛微粒子の表面積にもよるが、おおむね0.1〜20
質量%程度とすることが好ましい。このように酸化亜鉛
微粒子の表面がカップリング剤で被覆されていることに
よって、酸化亜鉛微粒子が有する光触媒活性を少量の被
覆量で無駄なく十分に抑制することができ、一方では、
紫外線吸収作用や抗菌、殺菌等の作用をそのまま維持す
ることができる。このため、このようなカップリング剤
で表面が被覆された酸化亜鉛微粒子を含有する繊維は、
紫外線による変色が防止され、同時に抗菌や殺菌等の効
果が達成される。
The coating amount of the coupling agent depends on the surface area of the zinc oxide fine particles, but is generally 0.1 to 20.
It is preferable to set the content to about mass%. By coating the surface of the zinc oxide fine particles with the coupling agent in this manner, the photocatalytic activity of the zinc oxide fine particles can be sufficiently suppressed with a small coating amount without waste, while on the other hand,
It is possible to maintain the ultraviolet absorbing effect, antibacterial effect, and sterilizing effect as they are. Therefore, a fiber containing zinc oxide fine particles whose surface is coated with such a coupling agent is
Discoloration due to ultraviolet rays is prevented, and at the same time effects such as antibacterial and sterilization are achieved.

【0017】本発明の繊維においては、カップリング剤
で表面が被覆された酸化亜鉛微粒子のポリアミド樹脂中
の含有量を0.1〜5.0質量%、好ましくは0.3〜
3.5質量%とする。含有量が0.1質量%未満である
と、抗菌性が十分に付与された繊維とならず、含有量が
5.0質量%を超えると、紡糸や延伸時に糸切れが発生
したり、製織時にガイド、筬、綜絖等の摩耗による糸切
れや毛羽等が多発し、操業性が悪化する。さらに、抗菌
性能が飽和してコスト高となるばかりか強伸度等の糸質
性能が低下する。
In the fiber of the present invention, the content of zinc oxide fine particles whose surface is coated with a coupling agent in the polyamide resin is 0.1 to 5.0% by mass, preferably 0.3 to
It is 3.5 mass%. If the content is less than 0.1% by mass, the fibers are not sufficiently imparted with antibacterial properties, and if the content exceeds 5.0% by mass, yarn breakage occurs during spinning or drawing, or weaving. At times, yarn breakage and fluff due to abrasion of guides, reeds, heddle, etc. occur frequently, and operability deteriorates. Further, not only the antibacterial performance is saturated and the cost becomes high, but also the yarn quality performance such as strength and elongation is deteriorated.

【0018】本発明に用いる表面をカップリング剤で被
覆処理した酸化亜鉛微粒子は、被覆前の酸化亜鉛微粒子
の粉砕条件を検討の結果、一次粒子の平均粒径が0.0
5〜0.5μm、二次粒子の平均粒径が1.0〜4.0
μmのものとする。二次粒子は被覆処理により一次粒子
の凝集力が抑制されるものであり、平均粒径が1.0〜
4.0μmとする。一次粒子の平均粒径が0.05〜
0.5μm、二次粒子の平均粒径が1.0〜4.0μm
の酸化亜鉛微粒子は紡糸工程中のフィルターに捕捉され
ることがないため、得られる繊維は抗菌剤濃度が繊維の
長手方向で均一となり、これにより、フィラメントの光
沢感が均一となり、フィラメント間の染色性が均一とな
る。
As for the zinc oxide fine particles whose surface is coated with a coupling agent used in the present invention, the average particle diameter of the primary particles is 0.0 as a result of examination of the pulverization conditions of the zinc oxide fine particles before coating.
5 to 0.5 μm, the average particle size of secondary particles is 1.0 to 4.0.
μm. The secondary particles are those whose cohesive force of the primary particles is suppressed by the coating treatment, and have an average particle size of 1.0 to
It is set to 4.0 μm. The average particle size of the primary particles is 0.05 to
0.5 μm, the average particle diameter of secondary particles is 1.0 to 4.0 μm
Since the zinc oxide fine particles of No. 1 are not captured by the filter during the spinning process, the concentration of the antibacterial agent in the obtained fiber becomes uniform in the longitudinal direction of the fiber, which results in uniform glossiness of the filament and dyeing between filaments. Uniformity.

【0019】一次粒子及び二次粒子の平均粒径は、カッ
プリング剤で被覆処理した酸化亜鉛微粒子を日立製作所
製S−4000型電界放射形走査電子顕微鏡で2000
〜10000倍に拡大して検鏡し、単一粒子を一次粒
子、2個以上の粒子が凝集した集合体を二次粒子として
粒径を測定しn=50を平均した値である。
The average particle size of the primary particles and the secondary particles is 2000 with a S-4000 type field emission scanning electron microscope manufactured by Hitachi Ltd. for zinc oxide particles coated with a coupling agent.
It is a value obtained by observing with a magnifying power of 10000 times, and observing a single particle as a primary particle, and an aggregate in which two or more particles are aggregated as a secondary particle, and averaging n = 50.

【0020】カップリング剤で被覆処理した酸化亜鉛微
粒子の一次粒子の平均粒径が0.05μm未満である
と、被覆処理による一次粒子の凝集力の抑制効果が不十
分となり二次粒子の平均粒径が10μm以上となり、紡
糸工程中のフィルターに捕捉されるため、目詰まりを起
こし濾過圧が上昇する。
If the average particle diameter of the primary particles of the zinc oxide fine particles coated with the coupling agent is less than 0.05 μm, the effect of suppressing the cohesive force of the primary particles by the coating treatment becomes insufficient and the average particle diameter of the secondary particles becomes small. Since the diameter is 10 μm or more and the particles are captured by the filter during the spinning process, clogging occurs and the filtration pressure increases.

【0021】一次粒子の平均粒径が0.5μmを超える
と、被覆処理による一次粒子の凝集力の抑制効果が作用
しても一次粒子が20個以上凝集すると二次粒子の平均
粒径が10μm以上となり紡糸工程中のフィルターに捕
捉されるため、目詰まりを起こし濾過圧が上昇する。
If the average particle size of the primary particles exceeds 0.5 μm, the average particle size of the secondary particles will be 10 μm if 20 or more of the primary particles agglomerate even if the effect of suppressing the agglomeration force of the primary particles by the coating treatment acts. As described above, since the particles are captured by the filter during the spinning process, clogging occurs and the filtration pressure increases.

【0022】さらに、本発明の繊維には、抗菌性の発現
を阻害しないものであれば、後加工により防ダニ剤、消
臭剤等を付与してもよいし、撥水加工、透湿防水加工等
を施してもよい。
Further, the fiber of the present invention may be post-processed with a mite-preventing agent, a deodorant, etc., as long as it does not inhibit the development of antibacterial properties. It may be processed.

【0023】本発明の繊維は、アルカリ処理前後の色差
ΔEが2.0以内であり、好ましくは1.5以下、さら
に好ましくは1.0以下である。すなわち、この値は、
抗菌剤として前記したようなカップリング剤で表面処理
された酸化亜鉛微粒子を含有することにより達成される
値であり、主に銀系の抗菌剤を使用することで生じてい
たアルカリ処理による変色(着色)がないことを示す指
数である。
The color difference ΔE before and after the alkali treatment of the fiber of the present invention is 2.0 or less, preferably 1.5 or less, more preferably 1.0 or less. That is, this value is
It is a value achieved by containing fine particles of zinc oxide surface-treated with a coupling agent as described above as an antibacterial agent, and the discoloration due to alkali treatment mainly caused by using a silver-based antibacterial agent ( It is an index indicating that there is no (coloring).

【0024】本発明におけるアルカリ処理前後の色差Δ
Eとは、アルカリ処理後の抗菌性繊維と同アルカリ処理
前の抗菌性繊維との色差ΔEであり、アルカリ処理前及
び処理後の繊維を筒編みした編物を8枚重ねにして、分
光光度計(マクベス社製、CE−3100)を用いて測
定する。
Color difference Δ before and after alkali treatment in the present invention
E is a color difference ΔE between the antibacterial fiber after the alkali treatment and the antibacterial fiber before the alkali treatment, and a spectrophotometer is formed by stacking eight knitted fabrics in which the fibers before and after the alkali treatment are cylindrically knitted. (CE-3100 manufactured by Macbeth Co.) is used for measurement.

【0025】このアルカリ処理前後の色差ΔEが2.0
を超えると、精練処理等のアルカリ処理により繊維が着
色する度合いが大きく、顔料や着色剤を含有しない繊維
の場合は白度が低下した繊維となり、顔料や着色剤を含
有する着色繊維の場合は、鮮明性が低下し、品位の低下
した繊維となる。また、アルカリとの反応により抗菌性
が著しく低下している場合もあり、好ましくない。
The color difference ΔE before and after the alkali treatment is 2.0.
If it exceeds, the degree of coloring the fiber by alkali treatment such as scouring treatment is large, and in the case of a fiber containing no pigment or colorant, the whiteness is reduced, and in the case of a colored fiber containing a pigment or colorant, , The sharpness is lowered, and the quality of the fiber is lowered. In addition, the antibacterial property may be significantly reduced due to the reaction with alkali, which is not preferable.

【0026】さらに、本発明の繊維は染色後の色差ΔE
が1.5以内であることが好ましい。この値は、一次粒
子の平均粒径が0.05〜0.5μm、二次粒子の平均
粒径が1.0〜4.0μmであるカップリング剤で表面
処理された酸化亜鉛微粒子を含有することにより達成さ
れる値である。すなわち、抗菌剤の粒径をこの範囲のも
のとすることで、繊維の長手方向で抗菌剤の濃度を均一
とすることができ、染色を行った際に染色のバラツキが
生じないことを示す指数である。なお、本発明における
染色後の色差ΔEとは、染色後の抗菌性繊維と同染色前
の抗菌性繊維との色差ΔEであり、染色前及び染色後の
繊維を筒編みした編物を8枚重ねにして、分光光度計
(マクベス社製、CE−3100)を用いて測定する。
Furthermore, the fiber of the present invention has a color difference ΔE after dyeing.
Is preferably 1.5 or less. This value contains zinc oxide fine particles surface-treated with a coupling agent having an average primary particle diameter of 0.05 to 0.5 μm and an average secondary particle diameter of 1.0 to 4.0 μm. This is the value achieved by That is, by setting the particle size of the antibacterial agent within this range, it is possible to make the concentration of the antibacterial agent uniform in the longitudinal direction of the fiber, and an index indicating that variations in dyeing do not occur when dyeing is performed. Is. The color difference ΔE after dyeing in the present invention is the color difference ΔE between the antibacterial fiber after dyeing and the antibacterial fiber before dyeing, and eight knitted fabrics in which the fibers before and after dyeing are tubularly knitted are stacked. Then, it is measured using a spectrophotometer (CE-3100 manufactured by Macbeth Co.).

【0027】次に、抗菌性の評価として、本発明の繊維
は50洗後の静菌活性値が2.2以上である。50洗後
の静菌活性値とは、抗菌性繊維及び捲縮加工糸を筒編み
した編物を用い、繊維製品新機能評価協議会(JAFE
T)が定める繊維製品の定量的抗菌性試験方法(統一試
験法)マニュアルに準じ、試験菌として黄色ブドウ状球
菌(Staphylococcus aureus ATCC 6538P) を用いて5
0洗後の静菌活性値を測定し、抗菌性の評価を行ったも
のである。サンプルは、未処理、アルカリ処理、50洗
後、耐候後(未処理サンプルを直接耐候処理した)につ
いて評価(抗菌性評価)した。なお、アルカリ処理は、
0.1%水酸化ナトリウム水溶液で30分間煮沸して行
い、50洗は、アルカリ処理、染色後のサンプルをJI
S L 0217の103の方法で行った。耐候処理
は、JIS L 0842に準拠し、カーボンアークフ
ェードメーターを用い、63℃で20時間、照射(4級
照射)を行った。
Next, as an evaluation of antibacterial properties, the fiber of the present invention has a bacteriostatic activity value of 2.2 or more after 50 washes. The bacteriostatic activity value after 50 washes is the knitted fabric of antibacterial fibers and crimped yarns, and the textile product new function evaluation meeting (JAFE
5) Using Staphylococcus aureus ATCC 6538P as a test bacterium in accordance with the quantitative antibacterial test method (unified test method) manual for textile products specified by T).
The antibacterial activity was evaluated by measuring the bacteriostatic activity value after zero washing. The sample was evaluated (antibacterial property evaluation) after being untreated, treated with alkali, washed 50 times, and after weathering (untreated sample was directly weathered). The alkaline treatment is
It is boiled for 30 minutes in 0.1% sodium hydroxide aqueous solution, and washed for 50 times with an alkali-treated and dyed sample.
S L 0217 103 method. The weather resistance treatment was performed in accordance with JIS L 0842, using a carbon arc fade meter, and performing irradiation (class 4 irradiation) at 63 ° C. for 20 hours.

【0028】本発明において、50洗後の静菌活性値を
基準として採用する意味は以下のとおりである。すなわ
ち、後加工工程で抗菌剤を繊維表面に被覆する方法の従
来法では、高々数回程度の洗濯で抗菌性が著しく低下し
てしまうため、特に洗濯回数が多い衣料用途では使用が
難しい。一方、本発明における洗濯回数50回は従来方
法に比べ著しく耐洗濯性が向上したもの(従来法が数回
〜10回に比べ、50回)であり、この50洗という数
値は、例えば繊維製品新機能評価協議会(JAFET)のSEK
評価の洗濯回数が最大でも50洗(衣料・寝具等)であ
ることから判断して、衣料用途でも十分な耐洗濯性を有
しているといえる。そして、抗菌効果と防臭効果の検討
(繊維製品新機能評価協議会抗菌防臭加工部会評価基準
WG報告書)より静菌活性値が2.2以上の時に皮膚常
在菌による臭気の発生が押さえられることから、本発明
において、衣料用に用いる際の実質的な抗菌効果が発現
される指標である静菌活性値が2.2以上を抗菌性の指
標とした。
In the present invention, the meaning of adopting the bacteriostatic activity value after 50 washings as a standard is as follows. That is, in the conventional method of coating the surface of the fiber with the antibacterial agent in the post-processing step, the antibacterial property is remarkably deteriorated by washing several times at most, and thus it is difficult to use it particularly for clothing applications in which washing is frequently performed. On the other hand, the number of washings of 50 times in the present invention is significantly improved in washing resistance as compared with the conventional method (50 times compared to several times to 10 times in the conventional method). New Function Evaluation Council (JAFET) SEK
Judging from the fact that the maximum number of times of washing to be evaluated is 50 washings (clothing, bedding, etc.), it can be said that it has sufficient washing resistance even for clothing applications. From the examination of antibacterial effect and deodorant effect (Evaluation Standard WG Report of Antibacterial and Deodorant Processing Section of Textile Products New Function Evaluation Council), when the bacteriostatic activity value is 2.2 or more, generation of odor due to indigenous bacteria is suppressed. Therefore, in the present invention, a bacteriostatic activity value of 2.2 or more, which is an index for expressing a substantial antibacterial effect when used for clothing, was taken as an antibacterial index.

【0029】50洗後の静菌活性値が2.2よりも小さ
いときは、多洗後に抗菌性が低下してしまい、抗菌性が
持続できない繊維となる。このため、耐洗濯性が要求さ
れるような衣料用途などには使用し難くなる。
When the bacteriostatic activity value after 50 washes is less than 2.2, the antibacterial property is lowered after the multiple washes, and the fibers cannot maintain the antibacterial property. For this reason, it becomes difficult to use it for clothes and the like which require washing resistance.

【0030】本発明の抗菌性繊維においては、50洗後
の静菌活性値は2.2以上であるが、特に、3.0以
上、さらには4.0以上であることが好ましい。
In the antibacterial fiber of the present invention, the bacteriostatic activity value after 50 washings is 2.2 or more, but it is particularly preferably 3.0 or more, and more preferably 4.0 or more.

【0031】そして、本発明の抗菌性ポリアミド繊維に
おいては、繊維の横断面形状を異形度20〜60%の異
形断面とすることが好ましい。このような異形断面形状
とすることにより、フィラメントの表面積が増すため抗
菌性能が向上する。また後記のノズル面より吐出後の糸
条の冷却に有利となり、固化点をよりノズル面に近くす
ることができる。これらのため本発明の抗菌性繊維の効
果、酸化亜鉛微粒子の効果が十分に発揮され、抗菌性及
びその持続性が向上する。これにより、酸化亜鉛微粒子
の含有量を減少させることもできるので、コストを軽減
することもできる。
In the antibacterial polyamide fiber of the present invention, it is preferable that the cross-sectional shape of the fiber is a modified cross section with a modified degree of 20 to 60%. By adopting such a modified cross-sectional shape, the surface area of the filament is increased and the antibacterial performance is improved. Further, it is advantageous for cooling the yarn after discharging from the nozzle surface described later, and the solidification point can be made closer to the nozzle surface. For these reasons, the effect of the antibacterial fiber of the present invention and the effect of the zinc oxide fine particles are sufficiently exerted, and the antibacterial property and its durability are improved. As a result, the content of the zinc oxide fine particles can be reduced, and the cost can be reduced.

【0032】本発明の繊維における異形度とは、フィラ
メントの横断面形状における内接円の直径を外接円の直
径で除した値に100を乗じた数値(%)をいう。この
ような形としては、三角や四角等の多角形のものや、凹
凸を多数有する多葉断面形状のもの、また、田型や井型
形状のものが挙げられる。
The degree of irregularity in the fiber of the present invention means a value (%) obtained by multiplying a value obtained by dividing the diameter of the inscribed circle in the cross-sectional shape of the filament by the diameter of the circumscribed circle by 100. Examples of such a shape include a polygonal shape such as a triangle and a square, a multi-lobed cross-sectional shape having a large number of irregularities, and a rice field shape or a well shape.

【0033】そして、本発明の繊維においては、異形、
異形でないにかかわらず、中空部を有していてもよく、
製織時の糸切れや毛羽の発生等を回避するために、芯部
に酸化亜鉛微粒子を含有させた芯鞘構造としてもよい。
In the fiber of the present invention, the irregular shape,
It may have a hollow portion regardless of whether it is a variant,
In order to avoid yarn breakage and fluff generation during weaving, a core-sheath structure in which zinc oxide fine particles are contained in the core may be used.

【0034】さらに、本発明の繊維は、短繊維でも長繊
維でもよく、長繊維としてはマルチフィラメントでもモ
ノフィラメントでもよく、短繊維、長繊維ともに単糸繊
度0.5〜2300dtexのものが挙げられる。
Further, the fiber of the present invention may be a short fiber or a long fiber, and the long fiber may be a multifilament or a monofilament, and both the short fiber and the long fiber have a single yarn fineness of 0.5 to 2300 dtex.

【0035】次に、本発明の抗菌性繊維の製造方法につ
いて説明する。本発明の製造方法においては、一次粒子
の平均粒径が0.05〜0.5μm、二次粒子の平均粒
径が1.0〜4.0μmである表面をカップリング剤で
被覆処理した酸化亜鉛微粒子を0.1〜5.0質量%含
有するポリアミド樹脂チップを製造し、チップの水分率
が0.05〜0.2質量%となるように調整して溶融紡
糸を行い、そして、溶融状態の糸をノズル面より400
mm以内で固化させることが重要である。
Next, a method for producing the antibacterial fiber of the present invention will be described. In the production method of the present invention, oxidation is performed by coating the surface of the primary particles having an average particle diameter of 0.05 to 0.5 μm and the secondary particles having an average particle diameter of 1.0 to 4.0 μm with a coupling agent. A polyamide resin chip containing 0.1 to 5.0% by mass of zinc fine particles is produced, and the moisture content of the chip is adjusted to 0.05 to 0.2% by mass, melt spinning is performed, and melting is performed. 400 threads from the nozzle surface
It is important to solidify within mm.

【0036】なお、本発明において、酸化亜鉛微粒子を
0.1〜5.0質量%含有するポリアミド樹脂チップと
は、あらかじめこの量の酸化亜鉛微粒子を含有するチッ
プを作成する方法のみならず、これらの酸化亜鉛微粒子
をポリアミド樹脂チップに直接ブレンドする方法や、あ
らかじめ酸化亜鉛微粒子を高濃度に含有したポリアミド
樹脂チップを製造し、そのチップとポリアミド樹脂チッ
プをブレンドするマスターチップ法により製造されたも
のが挙げられる。いずれの場合においても、使用する樹
脂チップの水分率を上記範囲となるように調整してから
溶融紡糸を行う。
In the present invention, the polyamide resin chip containing 0.1 to 5.0% by mass of zinc oxide particles is not limited to the method of preparing a chip containing this amount of zinc oxide particles in advance, and There is a method of directly blending the zinc oxide fine particles with the polyamide resin chip, or a method of producing a polyamide resin chip containing zinc oxide fine particles in a high concentration in advance, and a master chip method of blending the chip and the polyamide resin chip. Can be mentioned. In either case, melt spinning is performed after adjusting the water content of the resin chips to be used within the above range.

【0037】まず、チップの水分率が0.05〜0.2
質量%となるように調整するのは、得られるポリアミド
繊維のアルカリ処理後の着色や変色の要因として、樹脂
チップ中の水分率が関与しているからである。これは、
ポリアミド繊維が溶融状態では加水分解等の劣化を受け
やすいためであると思われ、水分率が増加するほど、得
られる繊維のアルカリ処理後の着色や変色は大きくな
る。すなわち、アルカリ処理を施す前の繊維において
は、着色や変色の差がなくても、チップの水分率が大き
いものほど、アルカリ処理後の繊維は着色や変色が大き
くなる。そこで、樹脂チップの水分率を上記の範囲内の
ものとするには、90〜160℃程度で乾燥させればよ
い。
First, the moisture content of the chip is 0.05 to 0.2.
The reason why the content is adjusted to be mass% is that the water content in the resin chip is involved as a factor for coloring or discoloring the polyamide fiber obtained after the alkali treatment. this is,
It is considered that this is because the polyamide fiber is susceptible to deterioration such as hydrolysis in a molten state, and as the water content increases, the coloring or discoloration of the obtained fiber after alkali treatment increases. That is, even if there is no difference in coloring or discoloration in the fiber before being subjected to the alkali treatment, the higher the moisture content of the chip, the greater the coloration or discoloration of the fiber after the alkali treatment. Therefore, in order to make the water content of the resin chip fall within the above range, it may be dried at about 90 to 160 ° C.

【0038】チップの水分率が0.2質量%を超える
と、得られる繊維のアルカリ処理後の着色や変色が大き
くなり、アルカリ処理前後の色差ΔEを2.0以内とす
ることが困難となり、チップの水分率が0.05質量%
未満であると、チップを乾燥させる工程が長くなり、コ
ストが高くなり、得られる繊維の強伸度等の物性も低下
しやすくなる。
When the water content of the chips exceeds 0.2% by mass, coloring and discoloration of the obtained fiber after the alkali treatment becomes large, and it becomes difficult to keep the color difference ΔE before and after the alkali treatment within 2.0. Moisture content of the chip is 0.05% by mass
When it is less than 1, the step of drying the chips becomes long, the cost becomes high, and the physical properties such as the strength and elongation of the obtained fiber are likely to deteriorate.

【0039】さらに、本発明の方法においては、固化点
をノズル面から400mm以内とする必要がある。本発明
においてノズル面から固化点までの距離は、得られる繊
維の抗菌性能の持続性に非常に大きな影響をおよぼす。
ここでいう固化点とは、ノズルより吐出した糸条の繊径
が最初に実質的に一定になった点であり、いわゆる糸条
が固化する点である。このノズル面から固化する点まで
の距離の計算方法は、モノフィラメントではその単糸の
値であり、マルチフィラメントでは、各単糸の平均値で
ある。
Further, in the method of the present invention, the solidification point must be within 400 mm from the nozzle surface. In the present invention, the distance from the nozzle surface to the solidification point has a very large influence on the durability of the antibacterial performance of the obtained fiber.
The solidification point here is a point at which the fiber diameter of the yarn discharged from the nozzle first becomes substantially constant, and the so-called yarn is solidified. The method of calculating the distance from the nozzle surface to the solidifying point is the value of the single yarn in the monofilament, and the average value of each single yarn in the multifilament.

【0040】通常の紡糸条件における固化点は、単糸繊
度にもよるが、600〜2000mmの範囲内である。本
発明においては、以下に説明するような方法を採用し
て、固化点がノズル面から400mm以内となるように冷
却、固化させる必要がある。すなわち、固化点をノズル
面から400mm以内とすることにより、ノズル孔から吐
出した溶融状態のポリアミドが冷却、固化する時間が短
くなり、抗菌剤が繊維表面にブリードアウトすることを
防ぐことができ、抗菌剤が繊維表面に局在化せず、繊維
内に均一に含有された繊維とすることが可能となる。
The solidification point under ordinary spinning conditions is in the range of 600 to 2000 mm, though it depends on the fineness of the single yarn. In the present invention, it is necessary to employ the method described below to cool and solidify so that the solidification point is within 400 mm from the nozzle surface. That is, by setting the solidification point within 400 mm from the nozzle surface, the time for the molten polyamide discharged from the nozzle hole to cool and solidify becomes shorter, and it is possible to prevent the antibacterial agent from bleeding out on the fiber surface, The antibacterial agent is not localized on the surface of the fiber, and the fiber can be uniformly contained in the fiber.

【0041】抗菌剤が繊維表面にブリードアウトする
と、抗菌剤が繊維表面から脱落しやすくなり、抗菌性能
持続期間が短くなり、耐洗濯性に劣るものとなる。固化
点がノズル面により近いほど、繊維表面に抗菌剤がブリ
ードアウトすることを防ぐことができ、抗菌性能の持続
性がより向上するので、中でも、350mm以内とする
ことが好ましい。
When the antibacterial agent bleeds out onto the fiber surface, the antibacterial agent is likely to fall off the fiber surface, the antibacterial performance duration is shortened, and the washing resistance becomes poor. The closer the solidification point is to the nozzle surface, the more the antibacterial agent can be prevented from bleeding out on the fiber surface and the durability of the antibacterial performance is further improved. Therefore, it is preferably within 350 mm.

【0042】固化点を400mm以内とするための方法と
しては、ノズル孔から吐出する際のポリマー温度を低く
抑えること、ノズル孔から吐出した溶融ポリアミドを冷
却するための冷却風の吹付温度を低くしたり、吹付風量
を多くすること、糸条の冷却を水等の液媒で行うこと等
の手段が挙げられる。
As a method for keeping the solidification point within 400 mm, the polymer temperature at the time of discharging from the nozzle hole is kept low, and the blowing temperature of cooling air for cooling the molten polyamide discharged from the nozzle hole is lowered. Alternatively, the amount of blown air may be increased, and the yarn may be cooled with a liquid medium such as water.

【0043】ノズル孔から吐出する際のポリマー温度を
低く抑える手段を採用する際には、吐出時のポリマー温
度を235〜255℃とすることが好ましく、さらに好
ましくは250℃以下、より好ましくは245℃以下と
する。通常の紡糸条件ではポリマー温度は255℃を超
えることが多く、例えば258℃の場合、通常の冷却条
件では、固化点を400mm以内とすることができず、繊
維表面に抗菌剤がブリードアウトし、得られる抗菌性繊
維の耐洗濯性が低下する。一方、吐出時のポリマー温度
が235℃よりも低い場合は、未溶解物等の発生により
紡糸時に糸切れが発生しやすくなる。
When a means for suppressing the polymer temperature at the time of discharging from the nozzle hole is adopted, the polymer temperature at the time of discharging is preferably 235 to 255 ° C., more preferably 250 ° C. or less, and further preferably 245. ℃ or less. Under normal spinning conditions, the polymer temperature often exceeds 255 ° C. For example, in the case of 258 ° C., under normal cooling conditions, the solidification point cannot be 400 mm or less, and the antibacterial agent bleeds out on the fiber surface, The washing resistance of the obtained antibacterial fiber is lowered. On the other hand, when the polymer temperature at the time of discharging is lower than 235 ° C., yarn breakage easily occurs during spinning due to generation of undissolved substances and the like.

【0044】冷却風による冷却の場合は、冷却風の温度
を10℃以下とすることが好ましい。冷却風の温度が1
0℃を超えると、固化点を400mm以内とすることは困
難である。
In the case of cooling with cooling air, the temperature of the cooling air is preferably 10 ° C. or lower. The temperature of the cooling air is 1
When it exceeds 0 ° C, it is difficult to set the solidification point within 400 mm.

【0045】冷却風の吹付風量は多いほど冷却には有利
となり好ましく、冷却風の吹き付け速度を1.5〜2.
5m/分とすることが好ましく、さらに好ましくは1.
7〜2.3m/分である。風速が2.5m/分を超える
と、紡糸時に糸切れが発生しやすくなり好ましくない。
通常の条件では、風速は1.5m/分未満としており、
1.5m/分未満では冷却が不十分となり固化点を40
0mm以内とすることが困難となる場合がある。
The larger the amount of cooling air blown, the more advantageous it is for cooling, which is preferable, and the blowing speed of cooling air is 1.5 to 2.
It is preferably 5 m / min, more preferably 1.
It is 7 to 2.3 m / min. If the wind speed exceeds 2.5 m / min, yarn breakage easily occurs during spinning, which is not preferable.
Under normal conditions, the wind speed is less than 1.5 m / min,
If it is less than 1.5 m / min, cooling will be insufficient and the solidification point will be 40
It may be difficult to set it within 0 mm.

【0046】繊維を冷却、固化させるときには、単糸繊
度の大きさが関係し、単糸繊維が小さいほど表面積が大
きくなるため冷却に有利となる。そこで、単糸繊度が
3.3dtex未満のものは、冷却風による冷却を採用
し、単糸繊度が3.3〜100dtexの繊維の場合
は、冷却効率が高い、後述するようなローラ式又はスリ
ットノズル式の液媒による冷却を採用することが好まし
い。さらに、単糸繊度が100dtexを超える繊維の
場合は、さらに冷却効率が高い、後述するような液浴に
浸漬させる方法や噴霧装置等により吹き付ける方法を採
用することが好ましい。
When the fiber is cooled and solidified, the size of the single yarn fineness is related. The smaller the single yarn fiber, the larger the surface area, which is advantageous for cooling. Therefore, if the single yarn fineness is less than 3.3 dtex, cooling with cooling air is adopted, and if the single yarn fineness is 3.3 to 100 dtex, the cooling efficiency is high and the roller type or slit as described later is used. It is preferable to employ cooling with a nozzle type liquid medium. Further, in the case of a fiber having a single yarn fineness of more than 100 dtex, it is preferable to employ a method of immersing in a liquid bath, which will be described later, or a method of spraying with a spraying device, which has higher cooling efficiency.

【0047】次に、液媒による冷却手段について説明す
る。冷却媒体として、水や油剤等の液媒を用いるもの
で、これらを用いて冷却すると、比熱の関係から冷却風
よりもより効率良く冷却されるため、単糸繊度が3.3
dtex以上の繊維の場合であっても固化点を400mm
以内とすることが容易となる。
Next, the cooling means using the liquid medium will be described. A liquid medium such as water or an oil agent is used as a cooling medium. When these are used for cooling, cooling is performed more efficiently than cooling air due to the specific heat. Therefore, the single yarn fineness is 3.3.
Even for fibers with dtex or more, the solidification point is 400 mm
It will be easy to stay within.

【0048】具体的には、ローラ式の液媒供給手段やス
リットノズル式の液媒供給手段をノズル面より400mm
以内、好ましくは、350mm以内に設けて、糸条を冷
却、固化させることが好ましい。これら、ローラ式又は
スリットノズル式の液媒供給手段は、後述する液浴に浸
漬させる方法や噴霧装置等により吹き付ける方法に比べ
て、紡糸速度を1000m/分以上にすることができる
ため、生産性の面からもより好ましい。
Specifically, a roller type liquid medium supply means or a slit nozzle type liquid medium supply means is 400 mm from the nozzle surface.
It is preferable that the yarn is provided within 350 mm, preferably within 350 mm, to cool and solidify the yarn. These roller-type or slit-nozzle type liquid medium supplying means can increase the spinning speed to 1000 m / min or more, as compared with the method of immersing in a liquid bath described later or the method of spraying with a spraying device, etc. From the viewpoint of, it is more preferable.

【0049】ローラ式の液媒供給手段では、液浴中の液
体をローラに供給して糸条(固化前)に付与する。スリ
ットノズル式の液媒供給手段では、液体供給管より液体
付与ノズルに供給された油剤を糸条(固化前)に付与す
る。その他には、液浴に浸漬させる方法や噴霧装置等に
より液媒を付与する方法でもよい。以上のこれらの冷却
手段は、単独で用いてもよく、2以上の手段を併用して
もよい。また、冷却風吹き付け装置とともに併用して、
冷却してもよい。
In the roller type liquid medium supply means, the liquid in the liquid bath is supplied to the rollers and applied to the yarn (before solidification). In the slit nozzle type liquid medium supply means, the oil agent supplied from the liquid supply pipe to the liquid application nozzle is applied to the yarn (before solidification). Alternatively, a method of immersing in a liquid bath or a method of applying a liquid medium by a spraying device or the like may be used. The above cooling means may be used alone or in combination of two or more. Also, in combination with the cooling air blowing device,
You may cool.

【0050】ここでいう液媒とは、例えば水やポリアル
キルグリコール、または鉱物油、有機酸、エーテル類等
を含む紡糸油剤が好ましく、これらを単独で用いても、
混合して用いてもよい。また液媒には、仕上げ剤等の種
々の添加剤が含まれていてもよい。
The liquid medium referred to herein is preferably a spinning oil containing water, polyalkyl glycol, mineral oil, organic acid, ethers or the like, and these may be used alone.
You may mix and use it. Further, the liquid medium may contain various additives such as a finishing agent.

【0051】これらの液媒の温度としては、低いほど糸
条の冷却効果が高くなるが、経済的な面から−20〜5
0℃とすることが好ましく、さらに好ましくは−10〜
30℃、より好ましくは0〜10℃である。
As for the temperature of these liquid media, the lower the temperature, the higher the effect of cooling the yarn, but from the economical aspect, it is -20 to 5
The temperature is preferably 0 ° C., and more preferably −10.
30 degreeC, More preferably, it is 0-10 degreeC.

【0052】このような方法により本発明の抗菌性繊維
を製造すると、紡糸中に抗菌剤が繊維表面にブリードア
ウトしないため、得られる繊維は、繊維内に抗菌剤が含
有され、繊維中の抗菌剤の分布も均一のものとなる。こ
のため多洗後でも繊維表面から抗菌剤が脱落せず、抗菌
性が維持され、耐洗濯性が要求されるような衣料用途に
も好適に使用することが可能となり、染色性にも優れた
品位の高い繊維を得ることができる。また、本発明の繊
維は耐候処理後の抗菌性能も高く、耐候処理後の靜菌活
性値が2.2以上となる。この理由は明らかではない
が、抗菌剤が繊維表面に局在化せず、均一に分布するこ
とから耐候処理による抗菌剤の劣化も抑制されるものと
推測される。
When the antibacterial fiber of the present invention is produced by such a method, the antibacterial agent does not bleed out to the fiber surface during spinning. Therefore, the obtained fiber contains the antibacterial agent in the fiber and the antibacterial agent in the fiber is The distribution of the agent is also uniform. Therefore, the antibacterial agent does not fall off from the surface of the fiber even after the multi-washing, the antibacterial property is maintained, and it can be suitably used also for the clothing use requiring the washing resistance, and the dyeing property is also excellent. High quality fiber can be obtained. Further, the fiber of the present invention has a high antibacterial property after weathering, and the bactericidal activity value after weathering becomes 2.2 or more. Although the reason for this is not clear, it is presumed that the antibacterial agent is not localized on the fiber surface and is uniformly distributed, so that the deterioration of the antibacterial agent due to weathering treatment is also suppressed.

【0053】本発明の抗菌性ポリアミド繊維を製造する
場合、紡糸した未延伸糸を一旦巻き取った後延伸する二
工程法でも、紡糸した糸条を冷却後、100m/分以上
の速度で巻き取る直接紡糸延伸法により製造してもよ
い。
In the case of producing the antibacterial polyamide fiber of the present invention, even in the two-step method in which the spun undrawn yarn is once wound and then drawn, the spun yarn is cooled and then wound at a speed of 100 m / min or more. You may manufacture by a direct spinning drawing method.

【0054】本発明の繊維を、溶融紡糸後一旦巻き取
り、延伸する二工程法により製造する場合には、25〜
1500m/分程度の速度で巻き取り、その後、延伸倍
率1.5〜6.0倍程度で延伸することが好ましく、糸
条の種類により熱延伸としても、室温程度の冷延伸とし
てもよく、熱延伸の場合は50〜170℃程度で行うこ
とが好ましい。
In the case where the fiber of the present invention is produced by a two-step method in which the fiber is melt-spun, temporarily wound and then stretched,
It is preferable to wind at a speed of about 1500 m / min and then draw at a draw ratio of about 1.5 to 6.0 times. Depending on the type of yarn, either hot drawing or cold drawing at room temperature may be used. In the case of stretching, it is preferably carried out at about 50 to 170 ° C.

【0055】直接紡糸延伸法により製造する場合には、
溶融紡糸した糸条を一旦巻き取ることなく、100m/
分以上の速度で巻き取って製造する。このとき、単糸繊
度が大きい繊維を得るときほど、紡糸速度が遅いほうが
好ましく、例えば単糸繊度が0.6〜3.3dtexで
は500〜5000m/分が好ましく、3.3〜100
dtexでは500〜3000m/分が好ましく、10
0dtexを超えるときは100〜1500m/分とす
ることが好ましい。巻き取るまでの間で延伸を行っても
よく、この場合は、50〜 150℃程度に加熱しながら、倍
率1.1〜3.0倍程度で熱延伸を行うことが好まし
い。
In the case of producing by the direct spinning and drawing method,
100 m / m without having to wind the melt-spun yarn once
It is manufactured by winding at a speed of at least a minute. At this time, the slower the spinning speed is, the more the fiber having a large single yarn fineness is obtained. For example, when the single yarn fineness is 0.6 to 3.3 dtex, 500 to 5000 m / min is preferable and 3.3 to 100.
The dtex is preferably 500 to 3000 m / min, and 10
When it exceeds 0 dtex, it is preferably 100 to 1500 m / min. Stretching may be performed before winding, and in this case, it is preferable to perform heat stretching at a draw ratio of 1.1 to 3.0 times while heating at about 50 to 150 ° C.

【0056】そして、本発明の捲縮加工糸の場合は、上
記のようにして得られた繊維に捲縮加工を施すものであ
るが、捲縮を付与する方法としては、例えば、仮撚加工
法、押込捲縮加工法、加熱流体による流体押込捲縮加工
法等が挙げられる。中でも、品質安定性やコストの面で
仮撚加工法が好ましい。
In the case of the crimped yarn of the present invention, the fibers obtained as described above are subjected to crimping. As a method for imparting crimps, for example, false twisting is used. Method, indentation crimping method, fluid indentation crimping method using heated fluid, and the like. Among them, the false twisting method is preferable in terms of quality stability and cost.

【0057】仮撚加工機としては、ピンタイプやディス
クタイプの施撚装置を備えた一般的な仮撚加工機を用い
ることができる。仮撚加工条件は、一般的な条件範囲で
適宜選択すればよく、通常は仮撚数(T/M)と繊維繊
度(d)の平方根との積で表される仮撚係数が1500
0〜33000の範囲となるようにすることが好まし
い。しかしながら、捲縮が得られる限りこれらに限定さ
れるものではなく、仮撚加工後にトルクを抑制するため
連続して熱処理を行う2段ヒータ仮撚加工を行ってもよ
い。
As the false twisting machine, a general false twisting machine equipped with a pin type or disk type twisting device can be used. The false twisting condition may be appropriately selected within a general condition range, and the false twist coefficient, which is usually represented by the product of the false twist number (T / M) and the square root of the fiber fineness (d), is 1500.
It is preferable to set it in the range of 0 to 33000. However, the present invention is not limited to these as long as crimps can be obtained, and two-stage heater false twisting may be performed in which heat treatment is continuously performed to suppress torque after false twisting.

【0058】そして、本発明の抗菌性ポリアミド織編物
は、本発明の抗菌性ポリアミド繊維又は抗菌性ポリアミ
ド捲縮加工糸を少なくとも一部に用いて製編織して得ら
れたものである。すなわち、本発明の抗菌性ポリアミド
織編物は、織編物を構成する繊維の全てに本発明の抗菌
性ポリアミド繊維及び又は捲縮加工糸を用いたものが好
ましいが、十分な抗菌性が得られる範囲であれば、予め
本発明の抗菌性ポリアミド繊維及び又は捲縮加工糸と、
これ以外の繊維との交絡混繊糸や合撚糸等を製造してお
き、このような混繊糸や合撚糸を製編織したもの、ある
いは、本発明の抗菌性ポリアミド繊維及び又は捲縮加工
糸と、これ以外の繊維とを交織、交編したものでもよ
い。
The antibacterial polyamide woven or knitted fabric of the present invention is obtained by weaving or weaving using the antibacterial polyamide fiber or the antibacterial polyamide crimped yarn of at least a part. That is, the antibacterial polyamide woven or knitted fabric of the present invention is preferably one in which the antibacterial polyamide fiber of the present invention and / or the crimped yarn are used for all the fibers constituting the woven or knitted fabric, but a range in which sufficient antibacterial properties are obtained. If so, in advance with the antibacterial polyamide fiber and or crimped yarn of the present invention,
A entangled mixed yarn or a twisted yarn with other fibers is manufactured in advance, and the mixed yarn or the twisted yarn is woven or knitted, or the antibacterial polyamide fiber and / or the crimped yarn of the present invention. And a fiber other than the above may be woven or knitted.

【0059】なお、上記のような織編物中の抗菌性繊維
又は捲縮加工糸の割合は、要求される抗菌性能や風合等
の用途により適宜選択すればよい。また、織編物とする
際の組織等の条件は特に限定されるものではなく、常法
により行えばよい。
The ratio of the antibacterial fiber or the crimped yarn in the woven or knitted material as described above may be appropriately selected depending on the required antibacterial performance and the use such as feeling. Further, the conditions such as the structure for forming the woven or knitted fabric are not particularly limited, and may be carried out by a conventional method.

【0060】そして、本発明の抗菌性ポリアミド繊維及
び捲縮加工糸はアルカリ処理前後の色差ΔEが2.0以
内さらには染色前後の色差ΔEが1.5以内であること
から、未染色や白色に染色した場合は白度に優れてお
り、淡色や濃色に染色した場合は鮮明性に優れている。
また、抗菌性能の持続期間が長い。したがって、これら
の繊維又は捲縮加工糸を一部又は全部に用いた本発明の
織編物は白色から濃色に染色を行うことができ、かつ耐
洗濯性が要求されるような用途に使用することができ
る。
The antibacterial polyamide fiber and the crimped yarn of the present invention have a color difference ΔE before and after the alkali treatment of 2.0 or less, and a color difference ΔE before and after dyeing of 1.5 or less. The whiteness is excellent when it is dyed in the above, and the sharpness is excellent when it is dyed in a light color or a dark color.
In addition, the duration of antibacterial performance is long. Therefore, the woven or knitted fabric of the present invention using these fibers or crimped yarn as a part or all can be dyed from white to a dark color, and is used for applications requiring washing resistance. be able to.

【0061】[0061]

【実施例】次に、本発明を実施例によって具体的に説明
する。なお、実施例中の特性値の測定は、次のとおりに
行った。 (a)強伸度 JIS L1090に準拠して測定した。 (b) 抗菌剤の一次粒径、二次粒径の測定 前記の方法にて測定した。 (c) 抗菌性 前記の方法にて測定した。 (d) アルカリ処理前後の色差ΔE 前記の方法で行った。 (e) 染色前後の色差ΔE 前記の方法で行った。なお、染色条件は、筒編みして得
た編物を、編物重量に対し100倍量の精練液で60
℃、30分間精練処理後、編物重量に対し100倍量の
染色液で常温から100℃まで30分間で昇温し、10
0℃で45分間染色処理を行った。精練液は0.1重量
%のアクチノールR100(松本油脂社製)を使用し、
染色液は0.3重量%のキリノールサイアニンG(キリヤ
化学社製)、1.0重量%のサンドゾール(サンド社
製)、0.2cc/lの酢酸を使用した。 (f) 耐候処理 前記の方法で行った。 (g) 固化点の測定(位置) 繊径測定装置(ZIMMER社製 460A/5)を用
い、ノズル面より下方に5cmずつの間隔でそれぞれの
位置で繊径を30秒測定し、平均値をとり、グラフを作
成する。そして、その平均値が一定(平均値が±1%以
内)になった最初の点(ノズル面下方からの距離)を糸
条の固化点とする。
EXAMPLES Next, the present invention will be specifically described with reference to examples. The characteristic values in the examples were measured as follows. (a) Strength and elongation Measured according to JIS L1090. (b) Measurement of primary particle diameter and secondary particle diameter of antibacterial agent The measurement was carried out by the method described above. (c) Antibacterial property The antibacterial property was measured by the above method. (d) Color difference before and after alkali treatment ΔE The difference was ΔE. (e) Color difference before and after dyeing ΔE The difference was ΔE. The dyeing conditions are as follows: The knitted fabric obtained by tubular knitting is treated with a 100-fold amount of the scouring liquid based on the weight of the knitted fabric.
After scouring at 30 ° C for 30 minutes, the temperature is raised from room temperature to 100 ° C in 30 minutes with 100 times the dyeing solution,
Dyeing treatment was performed at 0 ° C. for 45 minutes. 0.1% by weight of scouring liquid
% Actinol R100 (Matsumoto Yushi Co., Ltd.) is used,
As the dyeing solution, 0.3% by weight of kyrinol cyanine G (manufactured by Kiriya Chemical Co., Ltd.), 1.0% by weight of Sandzol (manufactured by Sand Co.), and 0.2 cc / l of acetic acid were used. (f) Weathering treatment It was carried out by the method described above. (g) Measurement of solidification point (position) Using a fiber diameter measuring device (460A / 5, manufactured by ZIMMER), the fiber diameter was measured for 30 seconds at each position at intervals of 5 cm below the nozzle surface, and the average value was calculated. Take a graph. Then, the first point (the distance from the lower side of the nozzle surface) at which the average value becomes constant (the average value is within ± 1%) is set as the solidification point of the yarn.

【0062】実施例1 相対粘度(96%硫酸を溶媒として、濃度1g/dl、温
度25℃で測定)が2.53、抗菌剤としてシランカップ
リング剤で粒子表面が被覆処理された一次粒子の平均粒
径が0.3μm、二次粒子の平均粒径が3.0μmであ
る酸化亜鉛微粒子(三井金属社製Z−NOUVE)を
1.2質量%含有するナイロン6チップを用い、このチ
ップの水分率を0.07質量%に調整した後、エクスト
ルーダー型溶融押出機に供給し、紡糸温度248℃で溶
融し、孔径が0.3mmの紡糸孔を24個有する紡糸口
金より吐出させた。ノズル面より320mm下方(固化点
の位置)に設けた冷却装置より冷却風(吹付風量:1.
5m/分、吹付温度:10℃)を吹き付けて糸条を冷
却、固化させ、オイリングローラで油剤を付与した後、
巻取速度4000m/分で巻き取って、44dtex/
24fの抗菌性繊維を得た。
Example 1 The relative viscosity (measured with 96% sulfuric acid as a solvent at a concentration of 1 g / dl and a temperature of 25 ° C.) of 2.53 was obtained, and the surface of the primary particles was coated with a silane coupling agent as an antibacterial agent. Using a nylon 6 chip containing 1.2% by mass of zinc oxide fine particles (Z-NOUVE manufactured by Mitsui Metals, Inc.) having an average particle size of 0.3 μm and an average particle size of secondary particles of 3.0 μm, After adjusting the water content to 0.07% by mass, it was supplied to an extruder type melt extruder, melted at a spinning temperature of 248 ° C., and discharged from a spinneret having 24 spinning holes with a hole diameter of 0.3 mm. Cooling air (amount of air blown: 1. Amount of cooling air from a cooling device provided 320 mm below the nozzle surface (position of solidification point).
5 m / min, spraying temperature: 10 ° C.) to cool and solidify the yarn, and after applying an oil agent with an oiling roller,
Winding at a winding speed of 4000 m / min, 44 dtex /
24f of antibacterial fiber was obtained.

【0063】実施例2〜5、比較例1〜4 抗菌剤の一次粒径、二次粒径、含有量、ナイロン6チッ
プの水分率、冷却風の吹付温度及び風量、固化点の位置
を表1及び表2に示すように種々変更した以外は、実施
例1と同様に行った。
Examples 2 to 5 and Comparative Examples 1 to 4 The primary particle size, secondary particle size, content, moisture content of nylon 6 chips, blowing temperature and flow rate of cooling air, and position of solidification point are shown. Example 1 was repeated except that various changes were made as shown in Table 1 and Table 2.

【0064】実施例6 ナイロン6チップに、顔料としてサンドリンバイオレッ
トBL(SANDOZ社製)を0.01質量%添加し、抗菌
剤の含有量、ナイロン6チップの水分率、固化点の位置
を表1に示すように種々変更した以外は、実施例1と同
様に行った。
Example 6 To a nylon 6 chip, 0.01% by mass of Sandrin Violet BL (manufactured by SANDOZ) was added as a pigment, and the content of the antibacterial agent, the water content of the nylon 6 chip and the position of the solidification point are shown in Table 1. Example 1 was repeated except that various changes were made as shown.

【0065】実施例7〜9、比較例5 抗菌剤の含有量、ナイロン6チップの水分率、冷却風の
吹付温度及び風量、固化点の位置、吐出ポリマー温度を
表1及び表2に示すように種々変更した以外は、実施例
1と同様の方法にて78dtex/24fの繊維を得
た。
Examples 7 to 9 and Comparative Example 5 Tables 1 and 2 show the content of the antibacterial agent, the moisture content of nylon 6 chips, the blowing temperature and amount of cooling air, the position of the solidification point, and the temperature of the discharged polymer. Fibers of 78 dtex / 24f were obtained in the same manner as in Example 1 except that various changes were made.

【0066】実施例10、比較例6 ナイロン6チップに、顔料としてyellow10G(BAYEL社
製)を0.1質量%添加し、抗菌剤の含有量、ナイロン
6チップの水分率、冷却風の吹付温度及び風量、固化点
の位置、吐出ポリマー温度を表1及び2に示すように種
々変更した以外は、実施例1と同様の方法にて78dt
ex/24fの繊維を得た。
Example 10 and Comparative Example 6 To nylon 6 chips, 0.1% by mass of yellow10G (manufactured by BAYEL) was added as a pigment, the content of antibacterial agent, the moisture content of nylon 6 chips, and the blowing temperature of cooling air. 78 dt in the same manner as in Example 1 except that the air flow rate, the position of the solidification point, and the temperature of the discharged polymer were changed as shown in Tables 1 and 2.
Fibers ex / 24f were obtained.

【0067】実施例11 相対粘度(96%硫酸を溶媒として、濃度1g/dl、温
度25℃で測定)が2.53、抗菌剤としてシランカップ
リング剤で粒子表面が被覆処理された一次粒子の平均粒
径が0.3μm、二次粒子の平均粒径が3.0μmであ
る酸化亜鉛微粒子(三井金属社製Z−NOUVE)を
1.0質量%含有するナイロン6チップを用い、このチ
ップの水分率を0.07質量%に調整した後、エクスト
ルーダー型溶融押出機に供給し、紡糸温度255℃で溶
融し、孔径が0.3mmの紡糸孔を34個有する紡糸口
金より吐出させた。口金面より390mm下方(固化点と
する)に、図1に示すローラ式の液媒供給手段を設け、
液媒として水を使用し、糸条に付与して冷却固化させ
た。このとき、水の温度は25℃で付与量は5ml/分
であった。続いて固化後の糸条に、オイリングローラで
油剤を付与した後、巻取速度3000m/分で巻き取っ
て、235dtex/34fの抗菌性繊維を得た。
Example 11 The relative viscosity (measured with 96% sulfuric acid as a solvent at a concentration of 1 g / dl and a temperature of 25 ° C.) of 2.53 was obtained for a primary particle whose surface was coated with a silane coupling agent as an antibacterial agent. A nylon 6 chip containing 1.0% by mass of zinc oxide fine particles (Z-NOUVE manufactured by Mitsui Kinzoku Co., Ltd.) having an average particle size of 0.3 μm and an average particle size of secondary particles of 3.0 μm was used. After adjusting the water content to 0.07% by mass, it was supplied to an extruder type melt extruder, melted at a spinning temperature of 255 ° C., and discharged from a spinneret having 34 spinning holes with a hole diameter of 0.3 mm. A roller type liquid medium supply means shown in FIG. 1 is provided 390 mm below the die surface (as a solidification point),
Water was used as a liquid medium and applied to the yarn to be cooled and solidified. At this time, the temperature of water was 25 ° C. and the application amount was 5 ml / min. Subsequently, an oil agent was applied to the solidified yarn with an oiling roller, and the yarn was wound at a winding speed of 3000 m / min to obtain 235 dtex / 34f of antibacterial fiber.

【0068】実施例12、比較例7 抗菌剤の含有量、ナイロン6チップの水分率、固化点の
位置を表3に示すように種々変更した以外は、実施例1
1と同様に行った。
Example 12, Comparative Example 7 Example 1 except that the content of the antibacterial agent, the water content of the nylon 6 chip, and the position of the solidification point were variously changed as shown in Table 3.
The same procedure as 1 was performed.

【0069】実施例13〜14、比較例8 ローラ式の液媒供給手段に代えて、図2に示すスリット
ノズル式の液媒供給手段を用い、10℃の水を付与量1
0ml/分で付与し、さらに、抗菌剤の含有量、ナイロ
ン6チップの水分率、固化点の位置を表3に示すように
種々変更した以外は、実施例11と同様に行った。
Examples 13 to 14 and Comparative Example 8 Instead of the roller type liquid medium supply means, a slit nozzle type liquid medium supply means shown in FIG.
It was applied at 0 ml / min, and the same procedure as in Example 11 was performed except that the content of the antibacterial agent, the water content of the nylon 6 chip, and the position of the solidification point were variously changed as shown in Table 3.

【0070】実施例15 相対粘度が3.70、抗菌剤としてシランカップリング
剤で粒子表面が被覆処理された一次粒子の平均粒径が
0.3μm、二次粒子の平均粒径が3.0μmである酸
化亜鉛微粒子(三井金属社製Z−NOUVE、直径0.
5〜1.0μm)を1.0質量%含有するナイロン6チ
ップを用い、このチップの水分率を0.05質量%に調
整した後、エクストルーダー型溶融押出機に供給し、紡
糸温度255℃で溶融し、孔径が2.0mmの紡糸孔よ
り吐出させた。紡出モノフィラメントをノズル面から2
0mm下方に設置した水浴で冷却後、常法に従い合計
5.3倍に延伸し、熱セットを行い、1120dtex
の抗菌性モノフィラメントを得た。
Example 15 Relative viscosity of 3.70, average particle size of primary particles whose surface was coated with a silane coupling agent as an antibacterial agent was 0.3 μm, and average particle size of secondary particles was 3.0 μm. Zinc oxide fine particles (Z-NOUVE manufactured by Mitsui Kinzoku Co., Ltd., diameter 0.
(5 to 1.0 μm) using a nylon 6 chip containing 1.0% by mass, and after adjusting the water content of this chip to 0.05% by mass, it is supplied to an extruder type melt extruder, and the spinning temperature is 255 ° C. Was melted and discharged from a spinning hole having a hole diameter of 2.0 mm. 2 spun monofilaments from the nozzle surface
After cooling in a water bath installed 0 mm below, stretching was carried out in accordance with a conventional method to a total of 5.3 times, and heat setting was performed to obtain 1120 dtex.
An antibacterial monofilament was obtained.

【0071】実施例16〜17、比較例9〜10 抗菌剤の含有量、ナイロン6チップの水分率、固化点の
位置を表4に示すように種々変更した以外は、実施例1
5と同様に行った。
Examples 16 to 17 and Comparative Examples 9 to 10 Example 1 except that the content of the antibacterial agent, the water content of the nylon 6 chip, and the position of the solidification point were variously changed as shown in Table 4.
The same procedure as 5 was performed.

【0072】実施例1〜10で得られた繊維の強度、伸
度、抗菌性、アルカリ処理前後の色差ΔE、染色後の色
差ΔEの評価結果を表1に、比較例1〜6で得られた繊
維のこれらの評価結果を表2に、実施例11〜14、比
較例7〜8で得られた繊維のこれらの評価結果を表3
に、さらに、実施例15〜17、比較例9〜10で得ら
れたモノフィラメントのこれらの評価結果を表4に示
す。
The evaluation results of the strength, elongation, antibacterial property, color difference ΔE before and after alkali treatment, and color difference ΔE after dyeing of the fibers obtained in Examples 1 to 10 are shown in Table 1, and obtained in Comparative Examples 1 to 6. Table 2 shows these evaluation results of the obtained fibers, and Table 3 shows these evaluation results of the fibers obtained in Examples 11 to 14 and Comparative Examples 7 to 8.
Table 4 shows the evaluation results of the monofilaments obtained in Examples 15 to 17 and Comparative Examples 9 to 10.

【0073】[0073]

【表1】 [Table 1]

【0074】[0074]

【表2】 [Table 2]

【0075】[0075]

【表3】 [Table 3]

【0076】[0076]

【表4】 [Table 4]

【0077】表1〜4から明らかなように、実施例1〜
14で得られた抗菌性繊維及び実施例15〜17で得ら
れた抗菌性モノフィラメントは、強伸度等の糸質物性に
優れ、アルカリ処理前後の色差ΔE及び染色前後の色差
ΔEも小さく、また50洗後及び耐候処理後の抗菌性の
評価も高く、白度、鮮明性及び耐洗濯性の要求される用
途にも良好に使用できるものであった。また、実施例1
〜15は、直接紡糸延伸法で製造したが、ガイド摩耗や
濾過圧の上昇等もなく、操業性よく製造することができ
た。一方、比較例1〜2は、表面をカップリング剤で被
覆処理した酸化亜鉛微粒子の一次粒径及び二次粒径が最
適でなく、繊維中の抗菌剤濃度をフィラメントの長手方
向で均一とすることができなったため、染色後及び50
洗後の抗菌性は高いものの、フィラメント間の染色性が
不均一なものとなった。比較例3〜6は、冷却条件等が
最適でなく、固化点をノズル面より400mm以内とす
ることができなかったため、アルカリ処理前の抗菌性は
高いものの、50洗後の抗菌性能が急激に低下し、また
耐候処理後の抗菌性もかなり低下したものとなった。比
較例7〜10は、ローラ又はスリット型の液媒供給手段
の位置及び冷却浴の位置(固化点)がノズル面より40
0mm以内でなかったため、同様にアルカリ処理前の抗
菌性は高いものの、50洗後の抗菌性能が急激に低下
し、また耐候処理後の抗菌性もかなり低下したものとな
った。
As is clear from Tables 1 to 4, Examples 1 to 1
The antibacterial fiber obtained in 14 and the antibacterial monofilaments obtained in Examples 15 to 17 are excellent in yarn physical properties such as strength and elongation, and the color difference ΔE before and after the alkali treatment and the color difference ΔE before and after dyeing are small, and After 50 washes and after weathering treatment, the antibacterial property was evaluated highly, and it could be favorably used in applications requiring whiteness, sharpness and washing resistance. In addition, Example 1
Nos. 15 to 15 were produced by the direct spinning and drawing method, but they could be produced with good operability without guide wear or increase in filtration pressure. On the other hand, in Comparative Examples 1 and 2, the primary particle diameter and the secondary particle diameter of the zinc oxide fine particles whose surfaces are coated with the coupling agent are not optimum, and the concentration of the antibacterial agent in the fibers is uniform in the longitudinal direction of the filaments. After dyeing and 50
Although the antibacterial property after washing was high, the dyeing property between filaments became uneven. In Comparative Examples 3 to 6, the cooling conditions were not optimal, and the solidification point could not be set within 400 mm from the nozzle surface. Therefore, the antibacterial properties before alkali treatment were high, but the antibacterial properties after 50 washing were drastically reduced. The antibacterial property after the weathering treatment was also considerably decreased. In Comparative Examples 7 to 10, the position of the roller or slit type liquid medium supply means and the position of the cooling bath (solidification point) were 40 from the nozzle surface.
Since it was not less than 0 mm, the antibacterial property before alkali treatment was similarly high, but the antibacterial property after 50 washings was drastically reduced, and the antibacterial property after weathering treatment was also considerably deteriorated.

【0078】実施例18〜19、比較例11〜12 抗菌剤の含有量を表5に示すように変更し、紡糸孔を3
4個有する紡糸口金を用い、78dtex/34fの繊
維を得た以外は実施例1と同様にして得られた抗菌性ポ
リアミド繊維に、フィードローラ、仮撚ヒータ、ピンタ
イプの仮撚施撚装置、デリベリローラ、捲取装置を順に
備えた仮撚加工機を使用し、表5に示すように仮撚加工
条件を種々変更して加工を施し、捲縮加工糸を得た。得
られた捲縮加工糸の強度、伸度、抗菌性、アルカリ処理
前後の色差ΔE、染色前後の色差ΔEを表5に示す。
Examples 18 to 19 and Comparative Examples 11 to 12 The content of the antibacterial agent was changed as shown in Table 5, and the number of spinning holes was changed to 3.
An antibacterial polyamide fiber obtained in the same manner as in Example 1 except that 78 dtex / 34f fibers were obtained by using four spinnerets, a feed roller, a false twist heater, a pin type false twist twisting device, Using a false twisting machine equipped with a delivery roller and a winding device in that order, the false twisting conditions were variously changed as shown in Table 5 to carry out processing to obtain a crimped yarn. Table 5 shows the strength, elongation, antibacterial property, color difference ΔE before and after alkali treatment, and color difference ΔE before and after dyeing of the obtained crimped yarn.

【0079】[0079]

【表5】 [Table 5]

【0080】表5から明らかなように、実施例18〜1
9で得られた抗菌性繊維は、強伸度等の糸質物性に優
れ、アルカリ処理前後の色差ΔE及び染色前後の色差Δ
Eも小さく、また50洗後及び耐候処理後の抗菌性の評
価も高いため、白度、鮮明性及び耐洗濯性の要求される
用途にも良好に使用できるものであった。一方、比較例
11は、抗菌剤を含有していなかったため、抗菌性を有
していないものであり、比較例12は、抗菌剤の含有量
が多すぎたため、紡糸、延伸時や仮撚加工時に糸切れが
発生し、操業性が悪く、得られた繊維の強伸度等の糸質
性能も低かった。
As is clear from Table 5, Examples 18 to 1
The antibacterial fiber obtained in No. 9 is excellent in yarn physical properties such as strength and elongation, and has a color difference ΔE before and after alkali treatment and a color difference Δ before and after dyeing.
Since E was also small and the antibacterial property after washing 50 and after weathering was high, it could be favorably used in applications where whiteness, sharpness and washing resistance are required. On the other hand, Comparative Example 11 does not have an antibacterial property because it does not contain an antibacterial agent, and Comparative Example 12 has too much antibacterial agent content, so spinning, drawing or false twisting is performed. At the time, yarn breakage occurred, the operability was poor, and the yarn quality properties such as the strength and elongation of the obtained fiber were low.

【0081】実施例20 実施例1の繊維を経糸と緯糸として用いて、経密度14
0本/2.54cm、緯密度108本/2.54cmの平織物を製織
した。これらの平織物の抗菌性、アルカリ処理前後の色
差ΔE、染色前後の色差ΔEについて測定、評価した。
なお、これらの評価、測定は前記記載の評価、測定方法
のうち編物で行っていたものを織物で行ったものであ
り、白度は織物1枚を分光光度計で測定した。
Example 20 Using the fibers of Example 1 as warp and weft, the warp density of 14
A plain woven fabric having 0 pieces / 2.54 cm and a weft density of 108 pieces / 2.54 cm was woven. The antibacterial properties of these plain fabrics, the color difference ΔE before and after the alkali treatment, and the color difference ΔE before and after dyeing were measured and evaluated.
In addition, these evaluations and measurements were performed by using a woven fabric among the evaluation and measurement methods described above, and the whiteness was measured by using a spectrophotometer for one woven fabric.

【0082】実施例21 実施例18の捲縮加工糸を経糸と緯糸として用いて、経
密度114本/2.54cm、緯密度86本/2.54cmの平織物
を製織した以外は、実施例20と同様にして行った。
Example 21 Example 20 was repeated except that the crimped yarn of Example 18 was used as a warp and a weft to fabricate a plain weave having a warp density of 114 threads / 2.54 cm and a weft density of 86 threads / 2.54 cm. The same was done.

【0083】実施例22 実施例1の繊維を経糸とし、比較例11の繊維を緯糸に
用い、経密度140本/2.54cm、緯密度108本/2.54
cmの平織物(抗菌性繊維の混率56%)を製織した以外
は、実施例20と同様にして行った。
Example 22 Using the fibers of Example 1 as warps and the fibers of Comparative Example 11 as wefts, the warp density was 140 yarns / 2.54 cm, the weft density was 108 yarns / 2.54
The same procedure as in Example 20 was performed except that a plain weave fabric (mixing ratio of antibacterial fibers: 56%) of cm was woven.

【0084】実施例23 実施例18の捲縮加工糸と比較例11の捲縮加工糸をデ
ュポン社製インターレーサーJD−1を用いて空気交絡
処理を施した交絡混繊糸を緯糸とし、経糸に比較例11
の捲縮加工糸を用い、経密度114本/2.54cm、緯密度
62本/2.54cmの平織物(抗菌性捲縮加工糸の混率26
%)を製織した以外は、実施例20と同様にして行っ
た。
Example 23 The crimped yarn of Example 18 and the crimped yarn of Comparative Example 11 were subjected to an air entanglement treatment using an interlacer JD-1 manufactured by DuPont to make a entangled mixed fiber yarn as a weft, and a warp. Comparative Example 11
Using the crimped yarn, the plain weave of warp density 114 / 2.54cm, weft density 62 / 2.54cm (mixing ratio of antibacterial crimped yarn 26
%) Was performed in the same manner as in Example 20 except that the woven fabric was woven.

【0085】実施例24 実施例1の繊維を用い、メッシュ組織にてトリコット編
物を得た。
Example 24 Using the fiber of Example 1, a tricot knitted fabric was obtained with a mesh structure.

【0086】実施例25 実施例1の繊維と比較例11の繊維を用い、モックロー
ディアの組織にて交編編物(筒編、抗菌性繊維の混率6
5%)を得た。
Example 25 Using the fiber of Example 1 and the fiber of Comparative Example 11, a knitted knitted fabric (cylindrical knitting, antibacterial fiber mixture ratio 6
5%) was obtained.

【0087】実施例20〜23の織物、実施例24〜2
5の編物の抗菌性、アルカリ処理前後の色差ΔE、染色
前後のΔEの評価結果を表6に示す。
Fabrics of Examples 20-23, Examples 24-2
Table 6 shows the antibacterial properties of the knitted fabric of No. 5, the color difference ΔE before and after the alkali treatment, and the evaluation results of ΔE before and after the dyeing.

【0088】[0088]

【表6】 [Table 6]

【0089】表6から明らかなように、本発明の抗菌性
繊維や抗菌性捲縮加工糸を全て、又は一部に用いた織編
物は、抗菌性の評価が高く、アルカリ処理前後の色差Δ
E及び染色後の色差ΔEも小さく、白度や鮮明性、染色
性を要求される用途にも良好に使用できるものであっ
た。
As is clear from Table 6, the woven or knitted fabric using the antibacterial fiber or the antibacterial crimped yarn of the present invention in whole or in part has a high antibacterial evaluation and a color difference Δ before and after the alkali treatment.
E and the color difference ΔE after dyeing were also small, and they could be favorably used in applications requiring whiteness, sharpness, and dyeability.

【0090】[0090]

【発明の効果】本発明の抗菌性ポリアミド繊維及び抗菌
性ポリアミド捲縮加工糸は、アルカリ処理を行っても変
色(着色)や抗菌性の低下がほとんどなく、また、淡色
や濃色で染色を行っても染色のバラツキがほとんどな
く、さらに、耐洗濯性にも優れた良好な抗菌性を有し、
強伸度にも優れ、白度や鮮明性が要求される用途にも好
適に使用することが可能となる。そして、本発明の抗菌
性ポリアミド繊維の製造方法によれば、上記のような繊
維及び捲縮加工糸を操業性よく得ることができる。さら
に、本発明の抗菌性ポリアミド織編物は、本発明の抗菌
性ポリアミド繊維又は抗菌性ポリアミド捲縮加工糸を少
なくとも一部に用いているため、耐洗濯性にも優れた良
好な抗菌性を発現し、アルカリ処理を行っても変色(着
色)や抗菌性の低下がほとんどなく、また、淡色や濃色
で染色を行ってもバラツキがほとんどなく、白度や鮮明
性が要求される用途にも好適に使用できる。
The antibacterial polyamide fiber and the antibacterial polyamide crimped yarn of the present invention show almost no discoloration (coloring) or decrease in antibacterial property even when subjected to alkali treatment, and are dyed in a light color or a dark color. There is almost no variation in dyeing even when going, and it also has good antibacterial properties with excellent washing resistance,
It has excellent strength and elongation and can be suitably used for applications requiring whiteness and sharpness. Further, according to the method for producing an antibacterial polyamide fiber of the present invention, the above fiber and crimped yarn can be obtained with good operability. Further, since the antibacterial polyamide woven or knitted fabric of the present invention uses the antibacterial polyamide fiber or the antibacterial polyamide crimped yarn of the present invention at least in part, it exhibits good antibacterial properties excellent in washing resistance. However, even if alkali treatment is applied, there is almost no discoloration (coloring) or deterioration of antibacterial properties, and even if dyeing with a light or dark color, there is almost no variation, and it is suitable for applications requiring whiteness and sharpness. It can be preferably used.

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Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 一次粒子の平均粒径が0.05〜0.5
μm、二次粒子の平均粒径が1.0〜4.0μmである
表面をカップリング剤で被覆処理した酸化亜鉛微粒子を
0.1〜5.0質量%含有しているポリアミド樹脂から
なり、アルカリ処理前後の色差ΔEが2.0以内であ
り、かつ50洗後の静菌活性値が2.2以上であること
を特徴とする抗菌性ポリアミド繊維。
1. The average particle size of primary particles is 0.05 to 0.5.
and a polyamide resin containing 0.1 to 5.0 mass% of zinc oxide fine particles having a secondary particle having an average particle diameter of 1.0 to 4.0 μm and having a surface coated with a coupling agent. An antibacterial polyamide fiber having a color difference ΔE of 2.0 or less before and after alkali treatment and having a bacteriostatic activity value after washing of 50 of 2.2 or more.
【請求項2】 染色後の色差ΔEが1.5以内である請
求項1記載の抗菌性ポリアミド繊維。
2. The antibacterial polyamide fiber according to claim 1, wherein the color difference ΔE after dyeing is within 1.5.
【請求項3】 請求項1又は請求項2記載の抗菌性ポリ
アミド繊維に捲縮を付与してなる抗菌性ポリアミド捲縮
加工糸。
3. An antibacterial polyamide crimped yarn obtained by crimping the antibacterial polyamide fiber according to claim 1 or 2.
【請求項4】 請求項1又は請求項2記載の抗菌性ポリ
アミド繊維、又は請求項3記載の抗菌性ポリアミド捲縮
加工糸を少なくとも一部に用いて製編織した抗菌性ポリ
アミド織編物。
4. An antibacterial polyamide woven or knitted fabric, which is knitted using at least a part of the antibacterial polyamide fiber according to claim 1 or 2, or the antibacterial polyamide crimped yarn according to claim 3.
【請求項5】 一次粒子の平均粒径が0.05〜0.5
μm、二次粒子の平均粒径が1.0〜3.0μmである
表面をカップリング剤で被覆処理した酸化亜鉛微粒子を
0.1〜5.0質量%含有するポリアミド樹脂チップを
水分率が0.05〜0.2質量%となるように調整した
後に溶融紡糸し、ノズル面より400mm以内で固化させ
ることを特徴とする請求項1又は請求項2記載の抗菌性
ポリアミド繊維の製造方法。
5. The average particle diameter of the primary particles is 0.05 to 0.5.
and a polyamide resin chip containing 0.1 to 5.0% by mass of zinc oxide fine particles whose surface has a mean particle diameter of 1.0 to 3.0 μm and is coated with a coupling agent. The method for producing an antibacterial polyamide fiber according to claim 1 or 2, wherein the spinning is performed after the content is adjusted to be 0.05 to 0.2% by mass, and the fiber is melt-spun and solidified within 400 mm from the nozzle surface.
JP2001263898A 2001-08-31 2001-08-31 Antibacterial polyamide fiber excellent in dyeability and washing resistance, antibacterial polyamide crimped yarn, antibacterial polyamide woven/knitted fabric, and method for producing the antibacterial polyamide fiber Pending JP2003073922A (en)

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JP2001263898A JP2003073922A (en) 2001-08-31 2001-08-31 Antibacterial polyamide fiber excellent in dyeability and washing resistance, antibacterial polyamide crimped yarn, antibacterial polyamide woven/knitted fabric, and method for producing the antibacterial polyamide fiber

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Publication Number Publication Date
JP2003073922A true JP2003073922A (en) 2003-03-12

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