JP2001049529A - Polyolefin-based splittable type conjugated fiber and nonwoven fabric using the same fiber - Google Patents
Polyolefin-based splittable type conjugated fiber and nonwoven fabric using the same fiberInfo
- Publication number
- JP2001049529A JP2001049529A JP21584899A JP21584899A JP2001049529A JP 2001049529 A JP2001049529 A JP 2001049529A JP 21584899 A JP21584899 A JP 21584899A JP 21584899 A JP21584899 A JP 21584899A JP 2001049529 A JP2001049529 A JP 2001049529A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- polyolefin
- component
- nonwoven fabric
- meth
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高圧液体流噴射等
の物理的処理によって優れた分割性を有するとともに優
れた加工性を有するポリオレフィン系分割型複合繊維に
関するものであり、ワイパー、人工皮革、衛生材料、フ
ィルター、電池用セパレータなどの用途に好適な不織布
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyolefin-based splittable conjugate fiber having excellent splitting properties and excellent workability by physical treatment such as high-pressure liquid jet injection, and relates to wipers, artificial leather, and the like. The present invention relates to a nonwoven fabric suitable for applications such as sanitary materials, filters, and battery separators.
【０００２】[0002]
【従来の技術】従来、複数のポリオレフィン系樹脂を構
成単位として組み合わせた分割型複合繊維として、特開
平８−３１１７１７号公報には、２成分のポリオレフィ
ン系樹脂の少なくとも１成分に脂肪酸グリセライド、ア
ルコキシ化アルキルフェノール、ポリオキシアルキレン
脂肪酸エステルなどからなる親水成分を練り込み添加さ
れたポリオレフィン系分割型複合繊維が提案されてい
る。特開平１１−１５８７２７号公報には、エチレン−
アクリル酸共重合体やエチレン−メタクリル酸共重合体
などの不飽和カルボン酸、不飽和カルボン酸誘導体、不
飽和カルボン酸無水物の中から選ばれる一種類以上とエ
チレンとからなるエチレン共重合体とこのエチレン共重
合体よりも融点の高い重合体とが混在する第１成分と、
このエチレン共重合体よりも融点の高い重合体からなる
第２成分で構成される分割型複合繊維が提案されてい
る。また、本出願人においても、特公平６−６３１２９
号公報にロックウェル硬度６０以上、各成分の炭素数差
Δｎ＞０．９からなるポリオレフィン系樹脂の組み合わ
せからなるポリオレフィン系分割型複合繊維を提案し、
特公平６−６３１３０号公報に融点２１０〜２４５℃、
ロックウェル硬度６０以上のポリメチルペンテンコポリ
マーとポリプロピレンよりなる分割型複合繊維を提案し
ている。2. Description of the Related Art Conventionally, as a splittable conjugate fiber obtained by combining a plurality of polyolefin-based resins as constituent units, Japanese Patent Application Laid-Open No. 8-31717 discloses that at least one component of a two-component polyolefin-based resin contains fatty acid glyceride and alkoxylated resin. Polyolefin-based splittable conjugate fibers to which a hydrophilic component such as an alkylphenol or a polyoxyalkylene fatty acid ester has been kneaded and added have been proposed. JP-A-11-158727 discloses ethylene-
An unsaturated carboxylic acid such as an acrylic acid copolymer or an ethylene-methacrylic acid copolymer, an unsaturated carboxylic acid derivative, an ethylene copolymer comprising one or more selected from unsaturated carboxylic anhydrides and ethylene. A first component in which a polymer having a higher melting point than the ethylene copolymer is mixed,
A splittable conjugate fiber composed of a second component made of a polymer having a melting point higher than that of the ethylene copolymer has been proposed. In addition, the present applicant has also disclosed Japanese Patent Publication No. 6-63129.
JP-A-2005-197, proposes a polyolefin-based splittable composite fiber composed of a combination of polyolefin-based resins having a Rockwell hardness of 60 or more and a carbon number difference Δn> 0.9 of each component,
JP-B-6-63130 discloses a melting point of 210 to 245 ° C,
A splittable composite fiber comprising a polymethylpentene copolymer having a Rockwell hardness of 60 or more and polypropylene has been proposed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記ポ
リオレフィン系分割型複合繊維には、以下の問題点があ
る。例えば、特開平８−３１１７１７号公報では、親水
成分を練り込み添加しているため、親水性に優れた不織
布は得られるが、親水成分が各成分の界面へブリードし
難く、高圧液体流処理による加工前処理の水濡れ状態を
維持できたとしても、分割処理に際しては高圧液体流噴
射圧（衝撃力）を高めなければならず、繊維ウェブの地
合が乱れてしまい、得られた不織布に斑が生じ易い。特
開平１１−１５８７２７号公報では、１成分がエチレン
共重合体成分であるため、融点が９０℃程度と低く、例
えば、フィルターや電池用セパレータなど１００℃以上
の耐熱性が要求される分野においては、不織布が自己融
着してしまい製品の品質に大きな影響を与えてしまう。
また、特公平６−６３１２９号公報および特公平６−６
３１３０号公報では、硬度を規定し、硬い樹脂を用いる
ことによって分割させようとしているが、分割させるの
に比較的高圧で液体流を噴射する必要があり、分割はさ
れるものの、繊維ウェブの地合が乱れてしまい、得られ
た不織布に斑が生じ易い。したがって、比較的少ない衝
撃力でも高度に分割され、かつ加工性に優れたポリオレ
フィン系分割型複合繊維が未だ得られていないのが実情
である。However, the polyolefin-based splittable conjugate fiber has the following problems. For example, in Japanese Patent Application Laid-Open No. 8-31717, a nonwoven fabric having excellent hydrophilicity can be obtained because a hydrophilic component is kneaded and added. However, the hydrophilic component does not easily bleed to the interface of each component, and the high pressure liquid flow treatment is performed. Even if the water wet state of the pre-processing can be maintained, the high-pressure liquid flow injection pressure (impact force) must be increased during the division processing, and the formation of the fibrous web is disturbed, and the obtained nonwoven fabric has irregularities. Tends to occur. In JP-A-11-158727, since one component is an ethylene copolymer component, its melting point is as low as about 90 ° C. For example, in a field where heat resistance of 100 ° C or more is required, such as a filter or a battery separator, In addition, the non-woven fabric self-fuses, which greatly affects the quality of the product.
Japanese Patent Publication No. 6-63129 and Japanese Patent Publication No. 6-6
In Japanese Patent No. 3130, the hardness is specified and the resin is divided by using a hard resin. However, it is necessary to jet a liquid stream at a relatively high pressure to perform the division. The bond is disturbed, and the resulting nonwoven fabric is likely to have spots. Therefore, the fact is that polyolefin-based splittable conjugate fibers which are highly split even with a relatively small impact force and have excellent processability have not yet been obtained.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、鋭意検討
の結果、複数成分の異なるポリオレフィン系樹脂からな
る分割型複合繊維であって、繊維断面において複数成分
のうち（メタ）アクリル酸金属塩を含有する成分（MA含
有成分）と（メタ）アクリル酸金属塩を含有しない成分
（MA不含成分）が隣接し、互いに分割させた構造を採る
ことにより、比較的少ない衝撃力でも高度に分割され、
かつ加工性に優れたポリオレフィン系分割型複合繊維を
得ることを見い出し、本発明に至った。Means for Solving the Problems As a result of intensive studies, the present inventors have found that a splittable conjugate fiber composed of a polyolefin-based resin having a plurality of different components, and a metal (meth) acrylate of a plurality of components in a fiber cross section. A salt-containing component (MA-containing component) and a component not containing (meth) acrylic acid metal salt (MA-free component) are adjacent to each other and have a structure that is separated from each other. Split,
The inventors have found that a polyolefin-based splittable conjugate fiber having excellent processability can be obtained, and have reached the present invention.
【０００５】本発明のポリオレフィン系分割型複合繊維
において、MA含有成分における（メタ）アクリル酸金属
塩の含有量は、１〜１０重量％であることが望ましい。
また、（メタ）アクリル酸金属塩は、メタクリル酸アル
カリ金属塩であることが望ましい。In the polyolefin-based splittable conjugate fiber of the present invention, the content of the metal (meth) acrylate in the MA-containing component is preferably 1 to 10% by weight.
The metal (meth) acrylate is preferably an alkali metal methacrylate.
【０００６】また、本発明に用いられる複数成分のポリ
オレフィン系樹脂は、ポリメチルペンテン系樹脂とポリ
プロピレン系樹脂の２成分からなることが望ましい。The polyolefin resin of a plurality of components used in the present invention preferably comprises two components of a polymethylpentene resin and a polypropylene resin.
【０００７】そして、前記ポリオレフィン系分割型複合
繊維は、分割されて、繊度１dtex未満の極細繊維を形成
させることにより、極細繊維独特の風合いを有し、緻密
であり、地合い斑の少ない均質な不織布となす。以下、
本発明の内容を具体的に説明する。[0007] The polyolefin-based splittable conjugate fiber is divided into fine fibers having a fineness of less than 1 dtex to form a uniform nonwoven fabric which has a unique texture of the fine fibers, is dense, and has few formation unevenness. And Less than,
The contents of the present invention will be specifically described.
【０００８】[0008]
【発明の実施の形態】本発明のポリオレフィン系分割型
複合繊維は、繊維断面において複数成分のうちの少なく
とも１成分は２個以上に分割されており、各成分は各々
が繊維断面の構成単位となっており、各構成単位は互い
に異なる成分の構成単位と隣接し、且つ全ての各構成単
位はその一部を繊維表面に露出した構造からなる。図１
〜図３に本発明のポリオレフィン系分割型複合繊維にけ
る断面図の一例を示す。そして、本発明に用いられるポ
リオレフィン系樹脂としては、ポリメチルペンテン、ポ
リプロピレン、ポリエチレン、ポリブテン等の重合体あ
るいは共重合体を挙げることができる。ポリメチルペン
テンとしては、４−メチルペンテン−１と例えばエチレ
ン、プロピレン、ブテン−１、ヘキセン−１、オクテン
−１、デカン−１、テトラデカン−１、オクタデカン−
１等の炭素数２〜２０、好ましくは８〜１８のα−オレ
フィンの１種または２種との共重合体が挙げられ、通常
４−メチルペンテン−１を８５モル％以上含んでいれば
よい。特に、融点が１００℃以上、より好ましくは１１
０℃以上のポリオレフィン系樹脂を用いると、耐熱性の
面で優れ都合がよい。BEST MODE FOR CARRYING OUT THE INVENTION In the polyolefin-based splittable conjugate fiber of the present invention, at least one of a plurality of components is divided into two or more in a fiber cross section, and each component is a constituent unit of the fiber cross section. Each structural unit is adjacent to a structural unit having a different component, and all the structural units have a structure in which a part of the structural unit is exposed on the fiber surface. FIG.
3 to 3 show examples of cross-sectional views of the polyolefin-based splittable conjugate fiber of the present invention. Examples of the polyolefin resin used in the present invention include polymers or copolymers such as polymethylpentene, polypropylene, polyethylene, and polybutene. As polymethylpentene, 4-methylpentene-1 and, for example, ethylene, propylene, butene-1, hexene-1, octene-1, decane-1, tetradecane-1, octadecane-
Copolymers with one or two kinds of α-olefins having 2 to 20 carbon atoms, preferably 8 to 18 carbon atoms, such as 1 and the like, may be used as long as they generally contain 85% by mole or more of 4-methylpentene-1. . In particular, the melting point is 100 ° C. or more, more preferably 11
Use of a polyolefin-based resin at 0 ° C. or higher is advantageous in terms of heat resistance and is convenient.
【０００９】そして、繊維断面において複数成分のうち
（メタ）アクリル酸金属塩を含有する成分（以下、MA含
有成分という）と（メタ）アクリル酸金属塩を含有しな
い成分（以下、MA不含成分という）が隣接し、互いに分
割させた構造をなし、（メタ）アクリル酸金属塩を用い
ると、各成分の界面における剥離性が著しく向上し、高
度な分割性が得られるのである。その理由は定かではな
いが、繊維製造工程中に熱が加わることによって、（メ
タ）アクリル酸金属塩が軟化して成分の界面に存在する
ようになり、隣接するMA不含成分との剥離性を向上させ
るためと推定される。よって、MA含有成分が隣接して存
在すると、各成分の界面における親和性がよくなって、
分割性が低下するため好ましくない。In the fiber cross section, a component containing a metal (meth) acrylate (hereinafter, referred to as an MA-containing component) and a component not containing a metal (meth) acrylate (hereinafter, an MA-free component) are included in a plurality of components. When a metal (meth) acrylate is used, the releasability at the interface of each component is remarkably improved, and a high degree of division is obtained. The reason for this is not clear, but heat is applied during the fiber manufacturing process, causing the metal (meth) acrylate to soften and become present at the interface between the components, making it easy to separate from adjacent MA-free components. It is presumed to improve. Therefore, when the MA-containing components are adjacent to each other, the affinity of each component at the interface is improved,
It is not preferable because the dividing property is reduced.
【００１０】前記MA含有成分における（メタ）アクリル
酸金属塩の含有量は、１〜１０重量％であることが好ま
しい。より好ましくは、１〜６重量％であり、さらに好
ましくは、２〜４重量％である。（メタ）アクリル酸金
属塩の含有量が１重量％未満であると、各成分の界面に
おける剥離性が不十分であるので分割性に劣り、１０重
量％を超えると、分割性は良好であるが、紡糸性に劣る
だけでなく、コスト高となるからである。The content of the metal (meth) acrylate in the MA-containing component is preferably 1 to 10% by weight. More preferably, it is 1 to 6% by weight, still more preferably 2 to 4% by weight. When the content of the (meth) acrylic acid metal salt is less than 1% by weight, the releasability at the interface between the components is insufficient, so that the releasability is poor. When the content exceeds 10% by weight, the releasability is good. However, this is not only inferior in spinnability but also in cost.
【００１１】本発明で用いられる（メタ）アクリル酸金
属塩としては、アクリル酸、メタクリル酸、アクリル酸
メチル、アクリル酸エステル、メタクリル酸メチル、メ
タクリル酸エステル等の金属塩が挙げられる。また、金
属塩としては、リチウム塩、ナトリウム塩、カリウム
塩、カルシウム塩、マグネシウム塩、アルミニウム塩等
が挙げられ、なかでも、金属塩がアルカリ金属塩である
と分割性が向上し、特に、カリウム塩が好適である。The metal (meth) acrylate used in the present invention includes metal salts such as acrylic acid, methacrylic acid, methyl acrylate, acrylate, methyl methacrylate, and methacrylate. Examples of the metal salt include a lithium salt, a sodium salt, a potassium salt, a calcium salt, a magnesium salt, and an aluminum salt. Among them, when the metal salt is an alkali metal salt, the resolving property is improved, and particularly, potassium is used. Salts are preferred.
【００１２】本発明のポリオレフィン系分割型複合繊維
の各成分の容積比率は、特に限定するものではないが、
１つの成分を少なくとも２分割できるだけの量があれば
よく、例えば、２成分であれば２／８〜８／２、好まし
くは４／６〜６／４である。各成分の容積比率が２／
８、あるいは８／２の範囲外であると、紡糸性に劣るだ
けでなく、分割性のよい繊維断面が得られないからであ
る。The volume ratio of each component of the polyolefin splittable conjugate fiber of the present invention is not particularly limited,
It suffices if the amount is such that one component can be divided into at least two. For example, if it is two components, it is 2/8 to 8/2, preferably 4/6 to 6/4. The volume ratio of each component is 2 /
If the ratio is out of the range of 8 or 8/2, not only is the spinnability inferior, but also a fiber section with good division properties cannot be obtained.
【００１３】本発明のポリオレフィン系分割型複合繊維
の繊度は、分割後の極細繊維の繊度が１dtex未満となる
ように適宜設定すればよいが、０．５〜２０dtexとする
ことが好ましい。繊度が０．５dtex未満であると、繊維
化が困難となり、２０dtexを超えると、分割後の繊度１
dtex未満の極細繊維を得るのが困難となるからである。
また、分割後発生する極細繊維の繊度は、１dtex未満で
あることが好ましい。より好ましくは、０．５dtex未満
であり、さらに好ましくは、０．３dtex未満である。[0013] The fineness of the polyolefin-based splittable conjugate fiber of the present invention may be appropriately set so that the fineness of the ultrafine fiber after splitting is less than 1 dtex, but is preferably 0.5 to 20 dtex. If the fineness is less than 0.5 dtex, fiberization becomes difficult, and if the fineness exceeds 20 dtex, the fineness after division is 1
This is because it becomes difficult to obtain an ultrafine fiber of less than dtex.
The fineness of the ultrafine fibers generated after the division is preferably less than 1 dtex. More preferably, it is less than 0.5 dtex, and even more preferably, it is less than 0.3 dtex.
【００１４】次に、本発明のポリオレフィン系分割型複
合繊維の製造方法について説明する。まず、前記ポリオ
レフィン系樹脂の少なくとも１成分の樹脂に（メタ）ア
クリル酸金属塩を混合する。混合する方法としては、公
知の混合装置を用いればよく、例えば、ヘンシェルミキ
サー、スーパーミキサーなどで混合し、公知の単軸また
は２軸押出機等で溶融混合して、あらかじめマスターバ
ッチ化しておくと都合がよい。このときポリオレフィン
系樹脂には、必要に応じて、酸化防止剤、紫外線防止剤
などの安定剤や酸化チタン、金属セッケン、カーボンブ
ラック、顔料、抗菌剤、防黴剤などの添加剤を混合させ
てもよい。Next, a method for producing the polyolefin-based splittable conjugate fiber of the present invention will be described. First, a metal (meth) acrylate is mixed with at least one component of the polyolefin resin. As a method of mixing, a known mixing device may be used.For example, mixing with a Henschel mixer, a super mixer, or the like, melt-mixing with a known single-screw or twin-screw extruder, or the like, and forming a master batch in advance convenient. At this time, the polyolefin resin is mixed with additives such as an antioxidant, a stabilizer such as an ultraviolet ray inhibitor and titanium oxide, a metal soap, carbon black, a pigment, an antibacterial agent, and a fungicide, as necessary. Is also good.
【００１５】そして、（メタ）アクリル酸金属塩が混合
されたポリオレフィン系樹脂は、公知の溶融紡糸機を用
い、溶融紡糸される。分割型複合ノズルを用いて、繊維
断面において複数成分のうちMA含有成分とMA不含成分が
隣接し、互いに分割された構造となるように、紡糸温度
２００〜３５０℃で樹脂を押し出し、所定の繊度の紡糸
フィラメントを作製する。紡糸フィラメントは、必要に
応じて延伸される。延伸は、延伸温度６０〜１５０℃、
延伸倍率２倍以上で処理すると、繊維強力が向上するの
で好ましい。得られたフィラメントには、繊維処理剤を
付着させてもよい。そして、必要に応じて、捲縮付与装
置で捲縮を与え、所定の長さに切断されて本発明のポリ
オレフィン系分割型複合繊維を得る。The polyolefin resin mixed with the metal (meth) acrylate is melt-spun using a known melt-spinning machine. Using a split-type composite nozzle, the resin is extruded at a spinning temperature of 200 to 350 ° C. so that the MA-containing component and the MA-free component of the plurality of components are adjacent to each other in the fiber cross-section and are separated from each other. A fine-filament spun filament is produced. The spun filament is drawn as needed. The stretching is performed at a stretching temperature of 60 to 150 ° C.
It is preferable to perform the treatment at a draw ratio of 2 times or more, since the fiber strength is improved. A fiber treatment agent may be attached to the obtained filament. Then, if necessary, crimping is performed by a crimping device and cut to a predetermined length to obtain the polyolefin-based splittable conjugate fiber of the present invention.
【００１６】得られたポリオレフィン系分割型複合繊維
は、不織布、織編物などの布帛に加工することができ
る。不織布の形態としては、サーマルボンド不織布、ケ
ミカルボンド不織布、スパンレース不織布、ニードルパ
ンチ不織布等の主としてステープル繊維からなる不織
布、スパンボンド不織布等の長繊維からなる不織布、湿
式抄造法による湿式不織布、エアレイ不織布等の短繊維
からなる不織布、あるいはこれらの積層体を用途に応じ
て決定するとよいが、高圧液体流噴射によるスパンレー
ス不織布が、ポリオレフィン系分割型複合繊維を高度に
分割させることができ、極細繊維独特の風合いを有し、
緻密であり、地合い斑の少ない均質な不織布が得られる
点で、特に好ましい。The obtained polyolefin-based splittable conjugate fiber can be processed into a fabric such as a nonwoven fabric or a woven or knitted fabric. Non-woven fabrics include non-woven fabrics mainly composed of staple fibers, such as thermal bonded non-woven fabrics, chemical bonded non-woven fabrics, spun lace non-woven fabrics, and needle-punched non-woven fabrics, non-woven fabrics composed of long fibers such as spun-bonded non-woven fabrics, wet-laid non-woven fabrics, and air-laid non-woven fabrics. It is good to determine the nonwoven fabric consisting of short fibers such as, or a laminate of these, depending on the application, but the spunlace nonwoven fabric by high-pressure liquid jetting can highly split polyolefin-based splittable conjugate fibers, Has a unique texture,
It is particularly preferable in that a homogeneous nonwoven fabric that is dense and has less formation unevenness can be obtained.
【００１７】例えば、ポリオレフィン系分割型複合繊維
を含有する不織布が、スパンレース不織布である場合、
高圧液体流処理は、従来からよく知られている方法で行
われ、その条件は最終的に得ようとする不織布の目付や
風合いなどに応じて設定すればよい。例えば、目付３０
〜８０g/m2のスパンレース不織布を得ようとする場合
は、孔径０．０５〜０．５mmのオリフィスが０．３〜
１．５mmの間隔で設けられたノズルから、水圧２〜１０
MPa の柱状水流を両面からそれぞれ１回以上噴射すると
よい。For example, when the nonwoven fabric containing the polyolefin-based splittable conjugate fiber is a spunlaced nonwoven fabric,
The high-pressure liquid flow treatment is performed by a conventionally well-known method, and the conditions may be set according to the basis weight, texture, and the like of the nonwoven fabric to be finally obtained. For example, the basis weight 30
In order to obtain a spun lace nonwoven to 80 g / m 2, the orifice 0.3 of pore size 0.05~0.5mm
From nozzles provided at 1.5 mm intervals, water pressure 2-10
It is recommended that the columnar water stream of MPa be injected at least once from each side.
【００１８】そして、前記不織布におけるポリオレフィ
ン系分割型複合繊維の含有量は、少なくとも１０重量％
であることが好ましい。より好ましくは、少なくとも２
０重量％である。含有量が１０重量％未満であると、不
織布中の極細繊維の占める割合が少なく、極細繊維独特
の風合いを有し、緻密な不織布が得られないからであ
る。ポリオレフィン系分割型複合繊維以外に混合する他
の素材としては、特に限定はされないが、コットン、パ
ルプ、麻、レーヨンなどのセルロース系繊維、ポリエチ
レンテレフタレート、ポリブチレンテレフタレートなど
のポリエステル系繊維、ナイロン６、ナイロン６６など
のポリアミド系繊維、アクリル系繊維、あるいはポリオ
レフィン系繊維などから任意に一あるいは二以上選択し
て使用することができる。また繊維形状においても特に
限定されず、単一繊維、鞘芯型複合繊維、偏心鞘芯型複
合繊維、並列型複合繊維、海島型複合繊維、分割型複合
繊維等の断面が円状、異形状等いずれであってもよい。The content of the polyolefin-based splittable conjugate fiber in the nonwoven fabric is at least 10% by weight.
It is preferable that More preferably, at least 2
0% by weight. When the content is less than 10% by weight, the proportion of the ultrafine fibers in the nonwoven fabric is small, the texture is unique to the ultrafine fibers, and a dense nonwoven fabric cannot be obtained. Other materials to be mixed other than the polyolefin-based splittable conjugate fiber are not particularly limited, but include cellulose fibers such as cotton, pulp, hemp, and rayon, polyethylene terephthalate, polyester fibers such as polybutylene terephthalate, nylon 6, One or two or more selected from polyamide fibers such as nylon 66, acrylic fibers, and polyolefin fibers can be used. The shape of the fiber is not particularly limited, and the cross-section of a single fiber, a sheath-core composite fiber, an eccentric sheath-core composite fiber, a side-by-side composite fiber, a sea-island composite fiber, a split composite fiber, or the like is circular or irregular. And so on.
【００１９】[0019]
【実施例】以下、本発明の内容について実施例を挙げて
具体的に説明する。なお、繊維強伸度、得られた不織布
の厚み、引張強力、破断伸度、分割率、および地合い斑
は、以下のとおり測定した。EXAMPLES Hereinafter, the contents of the present invention will be specifically described with reference to examples. The fiber strength and elongation, the thickness of the obtained nonwoven fabric, the tensile strength, the breaking elongation, the division ratio, and the formation unevenness were measured as follows.
【００２０】［繊維強伸度］ＪＩＳ Ｌ １０１５に準
じ、測定した。[Fiber strength and elongation] Measured according to JIS L1015.
【００２１】［厚み］厚み測定機（商品名：THICKNESS
GAUGE モデル CR-60A 株式会社大栄科学精器製作所製）
を用い、試料１cm2 あたり２０ｇの荷重を加えた状態で
測定した。[Thickness] Thickness measuring device (trade name: THICKNESS)
GAUGE model CR-60A manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd.)
Was measured with a load of 20 g applied per cm 2 of the sample.
【００２２】［引張強力、破断伸度］ＪＩＳ Ｌ １０
９６に準じ、幅５cm、長さ１５cmの試料片をつかみ間隔
１０cmで把持し、定速伸長型引張試験機を用いて引張速
度３０cm／分で伸長し、切断時の荷重値および伸長率を
それぞれ引張強力、破断伸度とした。[Tensile strength, elongation at break] JIS L10
According to 96, a sample piece having a width of 5 cm and a length of 15 cm is gripped at a spacing of 10 cm, and is stretched at a tensile speed of 30 cm / min using a constant-speed stretching type tensile tester. Tensile strength and breaking elongation were used.
【００２３】［分割率］不織布を断面方向に束ねて、電
子顕微鏡を用い、５００倍で観察し、分割型複合繊維の
うち、完全に分割した繊維の割合を分割率（％）とし
た。[Division ratio] The nonwoven fabric was bundled in the cross-sectional direction and observed with an electron microscope at a magnification of 500 times, and the ratio of completely split fibers among the splittable conjugate fibers was defined as the division ratio (%).
【００２４】［地合い斑］ ○・・・不織布の地合いに乱れが見られない △・・・不織布の地合いがやや乱れていた ×・・・不織布の地合いが乱れ、斑が発生していた[Formation unevenness] ・ ・ ・: No disturbance in the formation of the nonwoven fabric △: The formation of the nonwoven fabric was slightly disturbed ×: The formation of the nonwoven fabric was disturbed and spots were generated
【００２５】［実施例１］MA不含成分としてポリメチル
ペンテン系共重合体（商品名：ＤＸ８２０、三井化学
（株）製）を用い、MA含有成分としてポリプロピレン
（商品名：ＳＡ０３Ｂ、日本ポリケム（株）製）にメタ
クリル酸カリウム塩をポリプロピレン樹脂に対して３重
量％混合し、分割複合型ノズルを用い、２成分の容積比
率は５／５とし、MA不含成分の紡糸温度を３００℃、MA
含有成分の紡糸温度を２７０℃、引取速度６００m/min
で溶融紡糸を行い、図１に示すような２成分が互いに相
手成分によって８分割されている放射状断面からなる６
dtexの紡糸フィラメントを得た。前記紡糸フィラメント
を延伸温度１１０℃で３倍延伸し、繊維処理剤付与後、
切断して繊度２．２dtex、繊維長６mmのポリオレフィン
系分割型複合繊維を得た。Example 1 A polymethylpentene copolymer (trade name: DX820, manufactured by Mitsui Chemicals, Inc.) was used as a MA-free component, and polypropylene (trade name: SA03B, Nippon Polychem) was used as a MA-containing component. Co., Ltd.) was mixed with 3% by weight of potassium methacrylate based on the polypropylene resin, a split composite nozzle was used, the volume ratio of the two components was 5/5, the spinning temperature of the MA-free component was 300 ° C., MA
The spinning temperature of the components is 270 ° C, and the take-off speed is 600m / min.
1 and has a radial cross-section in which the two components are divided into eight parts by a partner component as shown in FIG.
A dtex spun filament was obtained. The spun filament is drawn three times at a drawing temperature of 110 ° C., and after applying a fiber treatment agent,
This was cut to obtain a polyolefin-based splittable conjugate fiber having a fineness of 2.2 dtex and a fiber length of 6 mm.
【００２６】そして、得られた繊維を４０重量％、繊度
２．２dtex、繊維長６mmの熱接着性複合繊維（商品名：
ＮＢＦ（Ｈ）、大和紡績（株）製）を２０重量％、およ
び繊度１．１dtex、繊維長１０mmのポリプロピレン繊維
（商品名：ＰＺ，大和紡績（株）製）４０重量％を混合
し、湿式抄紙して目付５０g/m2の湿式不織布を得た。得
られた湿式不織布の表裏面に水圧８MPaの高圧柱状水流
を４回噴射して、分割型複合繊維を分割させて、繊度約
０．２８dtexの極細繊維を形成させるとともに繊維同士
を交絡させた後、１３５℃で乾燥と同時に熱接着性複合
繊維を熱接着させてスパンレース不織布となした。Then, the obtained fiber was heat-adhesive conjugate fiber (trade name: 40% by weight, fineness: 2.2 dtex, fiber length: 6 mm).
20 wt% of NBF (H), manufactured by Daiwa Spinning Co., Ltd.) and 40 wt% of polypropylene fiber (trade name: PZ, manufactured by Daiwa Spinning Co., Ltd.) having a fineness of 1.1 dtex and a fiber length of 10 mm were mixed, and wet-processed. Papermaking was performed to obtain a wet nonwoven fabric having a basis weight of 50 g / m 2 . A high-pressure columnar water stream with a water pressure of 8 MPa is jetted four times on the front and back surfaces of the obtained wet nonwoven fabric to divide the splittable conjugate fibers to form ultrafine fibers having a fineness of about 0.28 dtex and to entangle the fibers. At the same time as drying at 135 ° C., the heat-adhesive conjugate fiber was heat-bonded to form a spunlace nonwoven fabric.
【００２７】［実施例２］メタクリル酸カリウム塩の添
加量を６重量％とした以外は、実施例１と同様の方法で
ポリオレフィン系分割型複合繊維およびこれを用いたス
パンレース不織布を得た。Example 2 A polyolefin-based splittable conjugate fiber and a spunlaced nonwoven fabric using the same were obtained in the same manner as in Example 1, except that the amount of potassium methacrylate added was 6% by weight.
【００２８】［実施例３］ポリメチルペンテン系共重合
体にメタクリル酸カリウム塩の混合量を３重量％とし、
ポリプロピレンにはメタクリル酸カリウム塩を混合しな
かった以外は、実施例１と同様の方法でポリオレフィン
系分割型複合繊維およびこれを用いたスパンレース不織
布を得た。Example 3 The mixing amount of potassium methacrylate in a polymethylpentene copolymer was set to 3% by weight.
A polyolefin-based splittable conjugate fiber and a spunlace nonwoven fabric using the same were obtained in the same manner as in Example 1, except that potassium methacrylate was not mixed with the polypropylene.
【００２９】［実施例４］（メタ）アクリル酸金属塩と
して、メタクリル酸ナトリウム塩を用いた以外は、実施
例１と同様の方法でポリオレフィン系分割型複合繊維お
よびこれを用いたスパンレース不織布を得た。Example 4 A polyolefin-based splittable conjugate fiber and a spunlace nonwoven fabric using the same were prepared in the same manner as in Example 1, except that sodium methacrylate was used as the metal (meth) acrylate. Obtained.
【００３０】［実施例５］MA不含成分をポリエチレン
（商品名ＨＥ４８２、日本ポリケム（株）製）とした以
外は、実施例１と同様の方法でポリオレフィン系分割型
複合繊維およびこれを用いたスパンレース不織布を得
た。Example 5 A polyolefin-based splittable conjugate fiber was used in the same manner as in Example 1, except that the MA-free component was polyethylene (trade name: HE482, manufactured by Nippon Polychem Co., Ltd.). A spunlace nonwoven fabric was obtained.
【００３１】［比較例１］２成分にメタクリル酸カリウ
ム塩を添加しなかった以外は、実施例１と同様の方法で
ポリオレフィン系分割型複合繊維およびこれを用いたス
パンレース不織布を得た。Comparative Example 1 A polyolefin splittable conjugate fiber and a spunlaced nonwoven fabric using the same were obtained in the same manner as in Example 1, except that potassium methacrylate was not added to the two components.
【００３２】［比較例２］高圧柱状水流の水圧を１３MP
aとした以外は、比較例１と同様の方法でポリオレフィ
ン系分割型複合繊維およびこれを用いたスパンレース不
織布を得た。[Comparative Example 2] The water pressure of the high-pressure columnar water stream was 13MPa.
A polyolefin-based splittable conjugate fiber and a spunlaced nonwoven fabric using the same were obtained in the same manner as in Comparative Example 1 except that a was used.
【００３３】［比較例３］メタクリル酸カリウム塩の代
わりに、炭素数１８のオレイン酸モノグリセライドを用
いた以外は、実施例１と同様の方法でポリオレフィン系
分割型複合繊維およびこれを用いたスパンレース不織布
を得た。Comparative Example 3 Polyolefin-based splittable conjugate fiber and spunlace using the same in the same manner as in Example 1, except that mono-glyceride oleate having 18 carbon atoms was used instead of potassium methacrylate. A non-woven fabric was obtained.
【００３４】［比較例４］両成分にメタクリル酸カリウ
ム塩の混合量を３重量％とした以外は、実施例１と同様
の方法でポリオレフィン系分割型複合繊維およびこれを
用いたスパンレース不織布を得た。実施例１〜５の物性
を表１に、比較例１〜４の物性を表２に示す。Comparative Example 4 A polyolefin-based splittable conjugate fiber and a spunlace nonwoven fabric using the same were prepared in the same manner as in Example 1 except that the amount of the potassium methacrylate salt mixed in both components was 3% by weight. Obtained. Table 1 shows the physical properties of Examples 1 to 5, and Table 2 shows the physical properties of Comparative Examples 1 to 4.
【００３５】[0035]
【表１】 [Table 1]
【００３６】[0036]
【表２】 [Table 2]
【００３７】実施例１〜５の分割型複合繊維を用いたス
パンレース不織布は、特に地合いが乱れることなく、容
易に分割させることができ、極細繊維独特の風合いを有
し、地合い斑の少ない均質な不織布であった。一方、比
較例１、３、４では、分割性が不十分で、極細繊維独特
の風合いが得られなかった。比較例２では、分割性を高
めるため、高圧で水流噴射したため、地合い斑が生じ
た。The spun lace nonwoven fabrics using the splittable conjugate fibers of Examples 1 to 5 can be easily divided without particularly disturbing the formation, have a unique texture of ultrafine fibers, and have a uniform formation with less uneven formation. Nonwoven fabric. On the other hand, in Comparative Examples 1, 3, and 4, the splitting property was insufficient, and a feeling unique to the ultrafine fiber was not obtained. In Comparative Example 2, a water jet was jetted at a high pressure in order to enhance the dividing property, and formation unevenness occurred.
【００３８】[0038]
【発明の効果】本発明のポリオレフィン系分割型複合繊
維は、繊維断面において（メタ）アクリル酸金属塩を含
有する成分（MA含有成分）と（メタ）アクリル酸金属塩
を含有しない成分（MA不含成分）が隣接し、互いに分割
させた構造を採ることにより、比較的少ない衝撃力でも
高度に分割し、かつ優れた加工性を有する。そして、本
発明のポリオレフィン系分割型複合繊維を分割させて、
繊度１dtex未満の極細繊維を形成させることにより、極
細繊維独特の風合いを有し、緻密であり、地合い斑の少
ない均質な不織布が得られる。本発明のポリオレフィン
系分割型複合繊維は、ワイパー、人工皮革、衛生材料、
フィルター、電池用セパレータなどの用途に好適であ
る。According to the polyolefin splittable conjugate fiber of the present invention, in the fiber cross section, a component containing a metal (meth) acrylate (MA-containing component) and a component not containing a metal (meth) acrylate (MA-free) are used. (Adjacent components) are adjacent to each other, and the structure is divided into each other, so that it is highly divided even with a relatively small impact force, and has excellent workability. Then, the polyolefin splittable conjugate fiber of the present invention is split,
By forming the ultrafine fibers having a fineness of less than 1 dtex, a uniform nonwoven fabric having a unique texture of the ultrafine fibers, being dense, and having less formation unevenness can be obtained. The polyolefin-based splittable conjugate fiber of the present invention is a wiper, artificial leather, sanitary material,
It is suitable for applications such as filters and battery separators.
【図１】本発明のポリオレフィン系分割型複合繊維にお
ける繊維断面の一例を示す。FIG. 1 shows an example of a fiber cross section of a polyolefin-based splittable conjugate fiber of the present invention.
【図２】本発明のポリオレフィン系分割型複合繊維にお
ける繊維断面の別の一例を示す。FIG. 2 shows another example of a fiber cross section in the polyolefin-based splittable conjugate fiber of the present invention.
【図３】本発明のポリオレフィン系分割型複合繊維にお
ける繊維断面の別の一例を示す。FIG. 3 shows another example of a fiber cross section in the polyolefin-based splittable conjugate fiber of the present invention.
１．MA含有成分 ２．MA不含成分 1. MA-containing component 2. MA-free components
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山下 憲司 兵庫県加古郡播磨町古宮877番地 ダイワ ボウポリテック株式会社播磨研究所内 Ｆターム(参考） 4L041 AA07 AA20 BA04 BA05 BA09 BA11 BD03 BD06 BD07 BD11 BD15 BD20 CA36 CA38 CA45 CB14 DD01 DD06 DD14 DD21 EE06 EE14 EE20 4L047 AA14 AA27 AB08 BA04 BA09 BB09 CC03 CC12 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Kenji Yamashita 877 Komiya, Harima-cho, Kako-gun, Hyogo F-term in Harima Research Laboratory, Daiwa Boupolitec Co., Ltd. 4L041 AA07 AA20 BA04 BA05 BA09 BA11 BD03 BD06 BD07 BD11 BD15 BD20 CA36 CA38 CA45 CB14 DD01 DD06 DD14 DD21 EE06 EE14 EE20 4L047 AA14 AA27 AB08 BA04 BA09 BB09 CC03 CC12
Claims (5)
からなる分割型複合繊維であって、繊維断面において複
数成分のうち（メタ）アクリル酸金属塩を含有する成分
（MA含有成分）と（メタ）アクリル酸金属塩を含有しな
い成分（MA不含成分）が隣接し、互いに分割されている
ことを特徴とするポリオレフィン系分割型複合繊維。1. A splittable conjugate fiber comprising a polyolefin resin having a plurality of different components, wherein a component containing a metal (meth) acrylate salt (MA-containing component) and a (meth) acryl A polyolefin splittable conjugate fiber, characterized in that components containing no acid metal salt (components not containing MA) are adjacent to each other and are separated from each other.
金属塩の含有量が、１〜１０重量％であることを特徴と
する請求項１記載のポリオレフィン系分割型複合繊維。2. The polyolefin-based splittable conjugate fiber according to claim 1, wherein the content of the metal (meth) acrylate in the MA-containing component is 1 to 10% by weight.
金属塩が、メタクリル酸アルカリ金属塩であることを特
徴とする請求項１または２に記載のポリオレフィン系分
割型複合繊維。3. The polyolefin splittable conjugate fiber according to claim 1, wherein the metal (meth) acrylate in the MA-containing component is an alkali metal methacrylate.
リメチルペンテン系樹脂とポリプロピレン系樹脂の２成
分からなることを特徴とする請求項１記載のポリオレフ
ィン系分割型複合繊維。4. The splittable conjugated polyolefin fiber according to claim 1, wherein the polyolefin resin of a plurality of components comprises two components of a polymethylpentene resin and a polypropylene resin.
レフィン系分割型複合繊維が分割されて、繊度１dtex未
満の極細繊維を形成していることを特徴とする不織布。5. A nonwoven fabric, wherein the polyolefin-based splittable conjugate fiber according to any one of claims 1 to 4 is split to form ultrafine fibers having a fineness of less than 1 dtex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21584899A JP3961724B2 (en) | 1999-07-29 | 1999-07-29 | Polyolefin-based split composite fiber and non-woven fabric using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21584899A JP3961724B2 (en) | 1999-07-29 | 1999-07-29 | Polyolefin-based split composite fiber and non-woven fabric using the same |
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| JP2001049529A true JP2001049529A (en) | 2001-02-20 |
| JP3961724B2 JP3961724B2 (en) | 2007-08-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011122657A1 (en) | 2010-03-30 | 2011-10-06 | ダイワボウホールディングス株式会社 | Polyolefin-based split-type conjugate fibre, fibrous mass and cell separator using same, and production method for same |
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1999
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011122657A1 (en) | 2010-03-30 | 2011-10-06 | ダイワボウホールディングス株式会社 | Polyolefin-based split-type conjugate fibre, fibrous mass and cell separator using same, and production method for same |
| KR101363721B1 (en) | 2010-03-30 | 2014-02-14 | 다이와보 폴리텍 가부시키가이샤 | Polyolefin-based split-type conjugate fibre, fibrous mass and cell separator using same, and production method for same |
| JP5560324B2 (en) * | 2010-03-30 | 2014-07-23 | ダイワボウホールディングス株式会社 | Polyolefin-based split composite fiber, fiber assembly and battery separator using the same, and method for producing the same |
| US9356272B2 (en) | 2010-03-30 | 2016-05-31 | Daiwabo Holdings Co., Ltd. | Polyolefin-based split-type conjugate fiber, fiber assembly and battery separator using the same and method for producing the same |
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| Publication number | Publication date |
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| JP3961724B2 (en) | 2007-08-22 |
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