JPH06116815A - Polyolefin-based core-sheath type conjugate fiber and nonwoven fabric using the same - Google Patents
Polyolefin-based core-sheath type conjugate fiber and nonwoven fabric using the sameInfo
- Publication number
- JPH06116815A JPH06116815A JP4285466A JP28546692A JPH06116815A JP H06116815 A JPH06116815 A JP H06116815A JP 4285466 A JP4285466 A JP 4285466A JP 28546692 A JP28546692 A JP 28546692A JP H06116815 A JPH06116815 A JP H06116815A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- melting point
- sheath
- component
- core
- 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.)
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Links
Abstract
Description
【０００１】本発明は熱融着性複合繊維及びこれを用い
た不織布に関する。更に詳しくは不織布化の熱処理温度
及び不織布のヒ−トシ−ル温度が低く、且つソフトな風
合いを有する不織布を与えるポリオレフイン系熱融着性
複合繊維及びこの繊維を使用した不織布に関する。The present invention relates to a heat-fusible composite fiber and a non-woven fabric using the same. More specifically, the present invention relates to a polyolefin-based heat-fusible composite fiber which gives a nonwoven fabric having a low heat treatment temperature for forming a nonwoven fabric and a low heat seal temperature and having a soft texture, and a nonwoven fabric using this fiber.
【０００２】[0002]
【従来の技術】ポリオレフイン系熱融着性複合繊維を用
いた不織布は、風合いのソフトさや高い不織布強力等の
特性が好まれ、紙おむつや生理用品のカバ−材等の衛材
用途に使用されている。熱融着性複合繊維を使用して不
織布とする場合、その熱処理方式はサクションバンドド
ライヤ−やサクションドラムドライヤ−等によるエア−
スル−方式と加熱ロ−ル等による熱圧着方式とに大別出
来る。衛材用途の低目付け不織布では、不織布製造時の
生産速度が速く、不織布の風合いが柔らかいという点
で、熱圧着方式の方がエア−スル−方式よりも有利であ
るとされている。熱圧着方式で生産速度を上げ、且つ高
い不織布強力を得るためには比較的高温度のエンボスロ
−ル等を用いる。2. Description of the Related Art Nonwoven fabrics made of polyolefin-based heat-fusible composite fibers are preferred for their soft texture and high nonwoven fabric strength, and are used as protective materials such as paper diapers and sanitary covers. There is. When using a heat-fusible composite fiber to make a non-woven fabric, the heat treatment method is air using a suction band dryer or suction drum dryer.
It can be roughly classified into a through type and a thermocompression type such as a heating roll. In the case of low basis weight nonwoven fabrics for use in sanitary materials, the thermocompression bonding method is considered to be more advantageous than the air-through method because the nonwoven fabric has a high production speed and the nonwoven fabric has a soft texture. In order to increase the production speed by the thermocompression bonding method and obtain a high strength of the nonwoven fabric, an embossing roll having a relatively high temperature is used.
【０００３】熱圧着方式に使用されるポリオレフイン系
（鞘／芯型）複合繊維として、（ＨＤＰＥ／ＰＰ）系複
合繊維、（ＨＤＰＥ／ＰＥＴ）系複合繊維等がある。又
プロピレン系共重合体から成る鞘成分にポリプロピレン
から成る芯成分が偏心的に複合された繊維（特公昭５５
−２６２０３、特開平２−９１２１７、特開平２−１９
１７２０）や、低密度ポリエチレンにパラフインや低分
子量ポリエチレンを配合した非複合繊維（特開昭６３−
１６５５１１）も知られている。衛材用不織布では、液
浸透性や嵩高性等の諸性能を改良する目的で、親水性や
嵩高性等の異なるウエブを積層し、エンボスロ−ル等で
熱圧着して２層構造とすることがある。また、紙おむつ
では、パルプ等を主体とする液吸収層の上面と下面を性
質の異なる不織布で覆い、二つ折りにし、その端部（ウ
エスト部）をヒ−トシ−ル（熱圧着）したものが使用さ
れるようになつてきた。Polyolefin type (sheath / core type) composite fibers used in the thermocompression bonding method include (HDPE / PP) type composite fibers and (HDPE / PET) type composite fibers. Further, a fiber in which a core component made of polypropylene is eccentrically combined with a sheath component made of a propylene-based copolymer (Japanese Patent Publication No.
-26203, JP-A-2-91217, JP-A-2-19
1720) or non-composite fibers obtained by blending low density polyethylene with paraffin or low molecular weight polyethylene (JP-A-63-
165511) is also known. In the case of non-woven fabric for sanitary materials, in order to improve various properties such as liquid permeability and bulkiness, webs having different hydrophilicity and bulkiness are laminated and thermocompression bonded with an embossing roll etc. to form a two-layer structure. There is. Further, in a paper diaper, one in which the upper surface and the lower surface of the liquid absorbing layer mainly composed of pulp or the like are covered with a non-woven fabric having different properties, folded in half, and the end portion (waist portion) thereof is heat-sealed (thermocompression bonding) is used. Has come to be used.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前記
（ＨＤＰＥ／ＰＰ）系複合繊維や（ＨＤＰＥ／ＰＥＴ）
系複合繊維から成る不織布は、他のポリオレフイン系不
織布に対するヒ−トシ−ル強力が低く、２層の不織布が
ヒ−トシ−ル部で剥離し易いという欠点がある。又、不
織布の生産性を上げる目的で、熱エンボスロ−ル等によ
る処理速度を上げると得られる不織布は強力の低いもの
となり、処理条件を高温高圧とすれば不織布強力は上が
っても風合いが硬くなるという欠点があった。前記偏心
型の複合繊維では、加熱処理時のウェブ収縮率が大きい
ので、不織布にしわが出来易く且つ強力も低いという欠
点がある。低密度ポリエチレン系非複合繊維では、比較
的低温でかつ高速で熱処理できるが、熱融着部で繊維が
溶融しフイルム状に変形するので、得られる不織布の風
合いが悪いという欠点がある。このように従来の複合繊
維では低温・高速の熱処理により不織布を得ようとする
と、高強度、風合い及びヒートシール性の全てを満足さ
せることができなかった。However, the above-mentioned (HDPE / PP) -based composite fiber or (HDPE / PET)
The non-woven fabric composed of the system-based composite fibers has a drawback that it has a low heat-sealing strength to other polyolefin-based non-woven fabrics and the two-layer non-woven fabric is easily peeled off at the heat-sealing portion. Further, for the purpose of increasing the productivity of the non-woven fabric, if the processing speed by hot embossing roll or the like is increased, the non-woven fabric obtained becomes less strong, and if the processing conditions are high temperature and high pressure, the texture becomes hard even if the non-woven fabric strength increases. There was a drawback. Since the eccentric type composite fiber has a large web shrinkage during heat treatment, it has a drawback that the nonwoven fabric is easily wrinkled and has a low strength. The low-density polyethylene-based non-composite fiber can be heat-treated at a relatively low temperature and at a high speed, but since the fiber is melted at the heat-bonding portion and deformed into a film, there is a drawback that the obtained nonwoven fabric has a poor texture. As described above, in the conventional composite fiber, when an attempt is made to obtain a nonwoven fabric by heat treatment at low temperature and high speed, it is not possible to satisfy all of high strength, texture and heat sealability.
【０００５】[0005]
【課題を解決するための手段】本発明は比較的低温・高
速の熱処理によっても高強度で風合いのソフトな不織布
となり、かつ他の不織布とのヒートシール強度が高い不
織布の得られる複合繊維を得ることを目的としてなされ
たものであり、以下の構成からなる。 （１）：プロピレン８０−９９重量％と他の１種又は２
種のαオレフイン２０−１重量％とからなる２元又は３
元共重合体９９−８５重量％と、融点又は軟化点が１２
５〜６０℃の飽和炭化水素ワックス１〜１５重量％とか
ら成る混合物を鞘成分とし、結晶性ポリプロピレンを芯
成分とする、熱融着性の複合繊維であり、（２）：芯成
分の偏心度が０．１以下で、且つ２次元捲縮が付与され
た前記（１）項記載の複合繊維であり、（３）：前記
（１）又は（２）項記載の複合繊維が使用された熱融着
不織布である。According to the present invention, a composite fiber can be obtained which can be a non-woven fabric having a high strength and a soft texture even when heat-treated at a relatively low temperature and a high speed and having a high heat-sealing strength with other non-woven fabrics. It has been made for the purpose of having the following structure. (1): 80-99% by weight of propylene and another one or two
A binary or three consisting of 20-1% by weight of α-olefin of the seed
99-85% by weight of the original copolymer and a melting point or softening point of 12
A heat-fusible composite fiber containing a mixture of 1 to 15% by weight of a saturated hydrocarbon wax at 5 to 60 ° C. as a sheath component and crystalline polypropylene as a core component. (2): Eccentricity of the core component The conjugate fiber according to the item (1), which has a degree of 0.1 or less and is provided with a two-dimensional crimp, and (3): the conjugate fiber according to the item (1) or (2) is used. It is a heat fusion bonded nonwoven fabric.
【０００６】本発明で鞘成分に用いる共重合体は、プロ
ピレン８０〜９９重量％と、エチレンあるいはブテン−
１等の他の１種又は２種のαオレフインが総量で２０〜
１重量％とからなる２元又は３元共重合体であり、ＭＦ
Ｒ（２３０℃、２．１６ｋｇ）が約５〜２００、融点約
１２０℃〜１５８℃のものが用いられる。該共重合体に
おいてプロピレン以外の他のαオレフイン濃度が１重量
％以上となると、共重合体の立体規則性が適度に乱され
るので不織布の風合いが柔らかく（剛軟度が小さく）な
り、後記の飽和炭化水素を混合する事により比較的低温
の熱処理による繊維の融着が容易となり、不織布への加
工速度やヒ−トシ−ル速度等を上げても大きな不織布強
力や大きなヒ−トシ−ル強力が得られる。しかし、他の
αオレフイン濃度が２０重量％を超えたものは、ゴム様
のベタツキ感のある悪い風合いの不織布となるので使用
に耐えない。共重合体の融点が前記の範囲以外の場合、
ヒ−トシ−ル速度、ヒ−トシ−ル強力、不織布加工速
度、不織布強力、不織布の風合い（剛軟度）等の何れか
が悪化するからである。The copolymer used as the sheath component in the present invention contains 80 to 99% by weight of propylene and ethylene or butene.
The total amount of other 1 or 2 kinds of α-olefin such as 1 is 20 to
It is a binary or ternary copolymer composed of 1% by weight and MF.
R (230 ° C., 2.16 kg) having a melting point of about 5 to 200 and a melting point of about 120 to 158 ° C. is used. When the α-olefin concentration other than propylene in the copolymer is 1% by weight or more, the stereoregularity of the copolymer is moderately disturbed, so that the texture of the non-woven fabric becomes soft (the bending resistance becomes small). By mixing the saturated hydrocarbons of the above, it becomes easy to fuse the fibers by heat treatment at a relatively low temperature, and even if the processing speed and the heat seal speed of the nonwoven fabric are increased, the strength of the nonwoven fabric is large and the heat seal of the nonwoven fabric is large. You can get powerful. However, other α olefin concentrations exceeding 20% by weight result in a non-woven fabric having a rubber-like sticky feeling and a bad texture, and therefore cannot be used. When the melting point of the copolymer is outside the above range,
This is because any one of the heat seal speed, the heat seal strength, the non-woven fabric processing speed, the non-woven fabric strength, the texture (rigidity and softness) of the non-woven fabric is deteriorated.
【０００７】鞘成分に添加する飽和炭化水素ワックスと
しては、その融点又は軟化点が約６０〜１２５℃のもの
が好ましく、市販の石油ワックスあるいは低分子量ポリ
エチレンが使用できる。ここで石油ワックスとは石油精
製の過程で高沸成分から精溜・溶媒抽出等により分離精
製されるもので、パラフィンワックス、微晶ワックス、
ペトラタムがあり、この中で微晶ワックスが共重合体と
の相溶性、接着温度の低下と接着強度のバランスの点で
好ましく、分子量が約８０００以下のものが使用出来
る。又この樹脂はカルボキシル化、スルホン化等の処理
がされていてもよい。鞘成分への飽和炭化水素ワックス
の添加量が１重量％未満では、繊維の融着温度を下げる
効果が不十分で、不織布への加工速度やヒ−トシ−ル速
度等を上げることができない。また、他の不織布とのヒ
ートシール強力も向上しない。鞘成分への飽和炭化水素
ワックスの添加量が１５重量％を超すと、複合繊維の可
紡性が悪くなり、紡糸時の糸切れが発生しやすく得られ
る繊維もデニ−ル斑の大きなものとなり好ましくな
い。、不織布加工時の加熱により複合繊維の低分子量ポ
リエチレンが溶融膜状化し、不織布の通気性や嵩高性が
悪くなり、しかも風合いが硬く且つゴム状のベタツキ感
のある悪い風合いの不織布となる等の理由で衛材用等の
不織布には適さない。The saturated hydrocarbon wax added to the sheath component preferably has a melting point or softening point of about 60 to 125 ° C., and commercially available petroleum wax or low molecular weight polyethylene can be used. Here, the petroleum wax is one which is separated and refined from the high boiling point component by rectification, solvent extraction, etc. in the process of refining petroleum.
Petratam is present, and among them, microcrystalline wax is preferable from the viewpoint of compatibility with the copolymer, reduction of adhesion temperature and balance of adhesion strength, and those having a molecular weight of about 8000 or less can be used. Further, this resin may be subjected to a treatment such as carboxylation or sulfonation. If the amount of the saturated hydrocarbon wax added to the sheath component is less than 1% by weight, the effect of lowering the fusion temperature of the fibers is insufficient and the processing speed of the nonwoven fabric and the heat seal speed cannot be increased. Also, the heat seal strength with other non-woven fabrics is not improved. If the amount of the saturated hydrocarbon wax added to the sheath component exceeds 15% by weight, the spinnability of the composite fiber deteriorates, and the fiber breakage easily occurs during spinning, and the resulting fiber also has large denier unevenness. Not preferable. The low molecular weight polyethylene of the composite fiber is melted into a film by heating during the processing of the nonwoven fabric, and the breathability and bulkiness of the nonwoven fabric deteriorates, and the texture becomes hard and the rubber-like non-woven fabric has a sticky feeling. For this reason, it is not suitable for non-woven fabrics for sanitary materials.
【０００８】本発明で複合繊維の芯成分に使用する結晶
性ポリプロピレンは、プロピレンを主成分とする結晶性
重合体であって、プロピレンと少量の他のαオレフイン
との共重合体であってもよく、ＭＦＲ（２３０℃、２．
１６ｋｇ）が約２〜１５０、融点約１５８℃以上の繊維
グレ−ド用のものが好ましい。このような重合体はチー
グラー・ナッタ触媒を用いるプロピレン（と少量の他の
αオレフインと）の公知の重合方法によって得られる。The crystalline polypropylene used as the core component of the conjugate fiber in the present invention is a crystalline polymer containing propylene as a main component, even if it is a copolymer of propylene and a small amount of other α-olefin. Well, MFR (230 ℃, 2.
16 kg) having a melting point of about 158 ° C. or higher and a melting point of about 158 ° C. or higher is preferred for the fiber grade. Such polymers are obtainable by known methods of polymerizing propylene (and a small amount of other alpha olefins) using a Ziegler-Natta catalyst.
【０００９】本発明の複合繊維は、上記の鞘成分と芯成
分とを公知の複合紡糸法により鞘芯型に紡糸し、延伸、
捲縮の付与う事により得る事ができる。複合比は鞘／芯
＝３０／７０〜７０／３０ｗｔ％の範囲、繊度は約０．
４〜１０ｄ／ｆ、捲縮数が約３〜６０山／２５ｍｍがカ
ード通過性がよく、好ましい不織布の風合い及び強力が
得られるので適当である。上記のような共重合体とワッ
クスとの混合物を鞘成分とし結晶性ポリプロピレンを芯
成分とする複合繊維は、鞘芯両成分間の収縮率の差が大
きいので熱処理時に３次元捲縮が発生し易く、ウェブに
も大きな収縮率が発生したりしわができ易いという性質
を潜在的に有している。芯成分の偏心度（繊維の中心と
芯成分の中心とのずれの指標）が大きくなると捲縮はス
パイラル状となりウエブの収縮率が更に大きくなる。こ
のような潜在的性質（捲縮性）は、芯成分の偏心度を約
０．１以下となるように紡糸することで解消できる。The conjugate fiber of the present invention is obtained by spinning the above-mentioned sheath component and core component into a sheath-core type by a well-known composite spinning method, and stretching.
It can be obtained by applying crimps. The composite ratio is in the range of sheath / core = 30/70 to 70/30 wt%, and the fineness is about 0.
4 to 10 d / f and a crimp number of about 3 to 60 threads / 25 mm are suitable because they have good card-passing properties and provide a desirable nonwoven fabric texture and strength. The composite fiber containing the mixture of the copolymer and the wax as the sheath component and the crystalline polypropylene as the core component has a large difference in shrinkage between the sheath-core components, so that three-dimensional crimping occurs during heat treatment. It has the property that it is easy and that the web is likely to have a large shrinkage factor and wrinkles easily. When the eccentricity of the core component (index of the deviation between the center of the fiber and the center of the core component) increases, the crimp becomes spiral and the shrinkage ratio of the web further increases. Such a latent property (crimpability) can be eliminated by spinning so that the eccentricity of the core component becomes about 0.1 or less.
【００１０】本発明の不織布は上記本発明の複合繊維を
カ−ド法等でウェブとした後、熱圧着法式あるいはエア
−スル−方式により複合繊維の鞘成分の融着温度以上に
加熱処理し、繊維の交差点を熱融着することにより製造
することができる。とりわけエンボスロ−ル等による熱
圧着法による不織布は、不織布強力が大であるので衛材
用不織布等の用途に好ましく用いられる。本発明の不織
布には上記の複合繊維に他種の繊維を混合して製造する
こともできる。混合して使用できる他種の繊維として
は、加熱処理時に劣化や融解を起こさない繊維であれば
よく、ポリプロピレン繊維、ポリエステル繊維、ポリア
ミド繊維、レ−ヨン、木綿等を例示できる。他種の繊維
と混合して使用する場合、充分な不織布強力やヒートシ
ール強力を維持するために、本発明の複合繊維の混合量
は約２０重量％以上とする必要がある。。The nonwoven fabric of the present invention is formed into a web by using the above-mentioned composite fiber of the present invention by a card method or the like, and then heat-treated by a thermocompression bonding method or an air-through method to a temperature higher than the fusion temperature of the sheath component of the composite fiber. It can be manufactured by heat-sealing the intersections of the fibers. In particular, a non-woven fabric obtained by a thermocompression bonding method using an embossing roll or the like has a high strength of the non-woven fabric and is therefore preferably used for a non-woven fabric for a sanitary material. The nonwoven fabric of the present invention can be produced by mixing the above-mentioned conjugate fiber with other types of fibers. Other types of fibers that can be mixed and used may be fibers that do not deteriorate or melt during heat treatment, and examples thereof include polypropylene fibers, polyester fibers, polyamide fibers, rayons, and cotton. When used by mixing with other types of fibers, in order to maintain sufficient nonwoven fabric strength and heat seal strength, the mixed amount of the conjugate fiber of the present invention needs to be about 20% by weight or more. .
【００１１】[0011]
【実施例】実施例及び比較例により、本発明を更に具体
的に説明する。なを、各例において用いた物性等の評価
方法を以下に示す。 繊維の強伸度：ＪＩＳ−Ｌ−１０１５に準じて測定
した。 繊維の偏心度：繊維の横断面を顕微鏡撮影し、以下の
式により算出した。 偏心度（ｈ）＝ｒ／ｄ ｒ：繊維全体の半径 ｄ：繊維全体の中心点から芯成分の中心点までの距離 ウェブ収縮率：１００ｇ／ｍ2 のカ−ド法ウェブを２
５ｃｍ角に切取り、１４５℃の乾燥機で５分間加熱処理
後の面積収縮率（％）を測定した。EXAMPLES The present invention will be described more specifically with reference to Examples and Comparative Examples. The evaluation methods of physical properties used in each example are shown below. Strength / elongation of fiber: measured according to JIS-L-1015. Eccentricity of fiber: A cross section of the fiber was photographed by a microscope and calculated by the following formula. Eccentricity (h) = r / dr r: radius of the entire fiber d: distance from the center point of the entire fiber to the center point of the core component Web shrinkage ratio: 100 g / m 2 card method web 2
It was cut into 5 cm squares, and the area shrinkage (%) was measured after a heat treatment for 5 minutes with a 145 ° C. dryer.
【００１２】不織布強力：所定の温度に加熱された凸
部面積２４％のエンボスロ−ルとフラツトな金属ロ−ル
からなる熱圧着装置を用いてカ−ド法ウェブを熱処理
し、目付け２５ｇ／ｍ2 の不織布とした。不織布の機械
の流れ方向（ＭＤ）を長さ方向として１５ｃｍ、不織布
の機械の流れ方向に直角な方向（ＣＤ）を幅方向として
５ｃｍ幅の試料片を切りとり、引張り試験機を用い、つ
かみ間隔１０ｃｍ、引張り速度１０ｃｍ／ｍｉｎで、そ
の長さ方向の引っ張り強力を測定した（ｇ／５ｃｍ）。 不織布の剛軟度：ＪＩＳ Ｌ １０９６の（４５゜カ
ンチレバー法）による。 不織布のヒ−トシ−ル強力：幅（ＣＤ）２．５ｃ
ｍ、長さ（ＭＤ）１０ｃｍの試料片２枚の端を長さ１ｃ
ｍだけ重ね、所定の温度に加熱されたヒ−トシ−ル機を
用いてヒ−トシ−ルし（ヒ−トシ−ル面積２．５ｃｍ
2 ）、引張試験機でつかみ間隔１０ｃｍ，引張り速度１
０ｃｍ／ｍｉｎでヒ−トシ−ル強力を測定した（ｇ／
２．５ｃｍ）。Nonwoven fabric strength: A card method web is heat-treated using a thermocompression bonding apparatus consisting of an embossing roll having a convex area of 24% heated to a predetermined temperature and a flat metal roll to give a basis weight of 25 g / m 2. 2 non-woven fabric. The machine direction of the non-woven fabric (MD) is 15 cm in the length direction, the direction perpendicular to the machine flow direction of the non-woven fabric (CD) is the width direction, and a 5 cm wide sample piece is cut, and the gripping interval is 10 cm using a tensile tester. The tensile strength in the lengthwise direction was measured at a pulling speed of 10 cm / min (g / 5 cm). Stiffness of non-woven fabric: According to JIS L 1096 (45 ° cantilever method). Non-woven heat seal strength: Width (CD) 2.5c
m, length (MD) 10 cm, the end of two pieces of sample 1 c
m is piled up and heat-sealed using a heat-sealing machine heated to a predetermined temperature (heat-sealing area: 2.5 cm).
2 ), gripping interval 10cm with a tensile tester, pulling speed 1
The heat seal strength was measured at 0 cm / min (g /
2.5 cm).
【００１３】実施例１〜４、比較例１〜４ これら各例において、鞘成分として用いたプロピレンを
主成分とする２元又は３元共重合体と飽和炭化水素ワッ
クスとの混合物の組成、芯成分として用いたポリプロピ
レンを第１表に示した。鞘成分と芯成分の複合比（重量
比）は５０／５０、紡糸温度（鞘／芯＝２７０／２７０
℃）の条件で紡糸し、２．４倍に延伸後１４山／２５ｍ
ｍの機械捲縮を付与し、単糸繊度２．２ｄｔｅｘ／ｆ、
繊維長５０ｍｍの芯鞘型複合繊維ステープルを得た。こ
れらの複合繊維をカ−ド機に通し目付け約２５ｇ／ｍ2
のウェブを得、更に該ウェブを所定の温度に加熱された
凸部面積２４％のエンボスロ−ルとフラツトロ−ルから
なる熱圧着装置を用い、線圧２５ｋｇ／ｃｍ、速度５ｍ
／ｍｉｎの条件で熱圧着加工し、目付け約２５ｇ／ｍ2
の不織布を得た。使用したそれぞれの原料の物性、及び
得られた繊維ならびに不織布の物性を表１に併せ示す。
表１から本発明の複合繊維は、熱圧着温度が低温でもＣ
Ｄ方向の不織布強力が高く、しかも不織布が柔らかい
（剛軟度が低い。低分子量ポリエチレンを混合してもあ
まり剛軟度が上らない）ことが判る。一方飽和炭化水素
ワックスの含有量が本願発明の規定に満たない複合繊維
は、熱圧着温度が低温の場合ＣＤ方向の不織布強力が低
く、又本願発明の規定を超す場合は不織布が硬い（剛軟
度が大）ことが判る。Examples 1 to 4 and Comparative Examples 1 to 4 In each of these examples, a composition of a mixture of a binary or terpolymer having propylene as a main component used as a sheath component and a saturated hydrocarbon wax, a core The polypropylene used as a component is shown in Table 1. The composite ratio (weight ratio) of the sheath component and the core component is 50/50, and the spinning temperature (sheath / core = 270/270).
Spinning under the conditions of (° C) and stretching 2.4 times, 14 threads / 25 m
Machine crimp of m is applied, and the single yarn fineness is 2.2 dtex / f,
A core-sheath type composite fiber staple having a fiber length of 50 mm was obtained. These composite fibers are passed through a carding machine and the areal weight is about 25 g / m 2.
Was obtained, and the web was heated to a predetermined temperature, and a thermocompression-bonding device consisting of an embossing roll having a convex area of 24% and a flat roll was used, and a linear pressure of 25 kg / cm and a speed of 5 m.
Thermocompression bonding under conditions of / min, and basis weight is about 25g / m 2
A non-woven fabric was obtained. Table 1 also shows the physical properties of the respective raw materials used and the physical properties of the obtained fibers and nonwoven fabrics.
From Table 1, the conjugate fiber of the present invention is C even if the thermocompression bonding temperature is low.
It can be seen that the strength of the non-woven fabric in the D direction is high and the non-woven fabric is soft (low in softness. Even when low molecular weight polyethylene is mixed, the softness does not increase so much). On the other hand, when the content of the saturated hydrocarbon wax is less than the requirement of the present invention, the nonwoven fabric strength in the CD direction is low when the thermocompression bonding temperature is low, and when the requirement of the present invention is exceeded, the nonwoven fabric is hard (soft and soft). It is understood that the degree is large).
【００１４】[0014]
【表１】 [Table 1]
【００１５】ヒートシール試験１ 上記の不織布のうち温度１３２℃で熱圧着して得た不織
布を用い、温度１２０〜１３０℃、圧力３ｋｇ／ｃｍ
2 、時間３秒で、同種の不織布同士をヒートシールし
た。ヒ−トシ−ル強力を表２に示す。この表より、本発
明の不織布は低温（１２０℃）でもヒ−トシ−ル強力が
高いことが分かる。Heat Seal Test 1 Among the above non-woven fabrics, non-woven fabrics obtained by thermocompression bonding at a temperature of 132 ° C. were used, and the temperature was 120 to 130 ° C. and the pressure was 3 kg / cm.
2. The non-woven fabrics of the same kind were heat-sealed in 3 seconds. Table 2 shows the heat seal strength. From this table, it is understood that the nonwoven fabric of the present invention has high heat seal strength even at low temperature (120 ° C.).
【００１６】[0016]
【表２】 [Table 2]
【００１７】ヒ−トシ−ル試験２ 鞘成分が高密度ポリエチレンで芯成分がポリプロピレン
の複合繊維（単糸デニ−ル１．５ｄ／ｆ、繊維長５１ｍ
ｍ、１６山／２５ｍｍの機械捲縮が付与）を、カ−ド法
でウェブとし、温度１４５℃のドライヤ−で熱処理して
目付け２３ｇ／ｍ2 の不織布（以下ＥＳＣ不織布と称す
ることがある）を得た。このＥＳＣ不織布と前記実施例
及び比較例の中で１３２℃で熱圧着して得られた不織布
とのヒ−トシ−ル試験を行った。ヒ−トシ−ル条件は、
温度１２０〜１４０℃、圧力３ｋｇ／ｃｍ2 、時間３秒
とした。ヒ−トシ−ル強力を表２に示した。この表より
本発明の不織布は、他種のポリオレフイン系不織布に対
しても低温でのヒ−トシ−ル強力が大であることが分か
る。Heat Seal Test 2 A composite fiber having a sheath component of high density polyethylene and a core component of polypropylene (single yarn denier 1.5 d / f, fiber length 51 m).
m, 16 peaks / 25 mm of mechanical crimp) is made into a web by the card method and heat treated in a dryer at a temperature of 145 ° C. to make a nonwoven fabric having a basis weight of 23 g / m 2 (hereinafter sometimes referred to as ESC nonwoven fabric). Got A heat seal test was conducted on this ESC nonwoven fabric and the nonwoven fabric obtained by thermocompression bonding at 132 ° C. in the above-mentioned Examples and Comparative Examples. Heat seal conditions are
The temperature was 120 to 140 ° C., the pressure was 3 kg / cm 2 , and the time was 3 seconds. The heat seal strength is shown in Table 2. From this table, it can be seen that the nonwoven fabric of the present invention has a high heat seal strength at low temperature even when compared with other types of polyolefin-based nonwoven fabrics.
【００１８】ヒ−トシ−ル試験３ 実施例２、４、比較例１、４で得られた不織布（１３２
℃で熱圧着したもの）同士、及び比較例１、２、実施例
１、２で得られた不織布（１３２℃で熱圧着したもの）
とＥＳＣ不織布とのヒ−トシ−ル試験を行った。ヒ−ト
シ−ル条件は温度１２８℃、圧力８．５ｋｇ／ｃｍ2 、
時間０．５〜２．５秒で行った。ヒ−トシ−ル強力を表
３に示した。この表から本発明の不織布は、ヒ−トシ−
ル時間が短時間であってもヒ−トシ−ル強力が大である
ことが判る。Heat Seal Test 3 Nonwoven fabrics (132) obtained in Examples 2 and 4 and Comparative Examples 1 and 4.
Non-woven fabrics obtained in Comparative Examples 1 and 2 and Examples 1 and 2 (those thermo-compressed at 132 ° C.).
And a heat seal test with an ESC nonwoven fabric were performed. Heat seal conditions are a temperature of 128 ° C., a pressure of 8.5 kg / cm 2 ,
The time was 0.5 to 2.5 seconds. The heat seal strength is shown in Table 3. From this table, the nonwoven fabric of the present invention is
It can be seen that the heat seal strength is great even if the rolling time is short.
【００１９】[0019]
【表３】 [Table 3]
【００２０】実施例５〜７，比較例５〜７ 偏心度を変えて紡糸した以外は、原料樹脂、複合比、紡
糸条件等を前記実施例４と同じ条件で製造した複合繊維
を用い、温度１４５℃で５分間熱処理してウェブ収縮率
を測定した。また、これらの複合繊維を前記実施例１〜
４と同様に温度１３２℃で熱圧着して目付け２５ｇ／ｍ
2の熱圧不織布を得た。これらの不織布と目付け４０ｇ
／ｍ2 のスパンボンド法によるポリプロピレン不織布と
のヒ−トシ−ル試験（温度１２８℃、圧力１０ｋｇ／ｃ
ｍ2、時間４秒）を行った。比較のため、前記ヒ−トシ
−ル試験２で使用したＥＳＣ不織布と上記スパンボンド
法ポリプロピレン不織布とのヒ−トシ−ル試験も併せて
行った（比較例７）。これらの試験結果を表４に示し
た。この表から偏心度が０．１以下の複合繊維はウェブ
収縮率が低い事がわかる。又ヒ−トシ−ル強力も大であ
る事がわかる。Examples 5 to 7 and Comparative Examples 5 to 7 Using the composite fiber produced under the same conditions as in Example 4 except that the eccentricity was changed and the spinning was performed, the raw material resin, the composite ratio, the spinning conditions and the like were used. The web shrinkage was measured by heat treatment at 145 ° C. for 5 minutes. In addition, these composite fibers are used in Examples 1 to 3 above.
Similar to 4, thermocompression-bonded at a temperature of 132 ° C. and basis weight 25 g / m
A hot pressed nonwoven fabric of 2 was obtained. 40 g of these non-woven fabrics
/ M 2 Spunbond method with polypropylene nonwoven fabric for heat seal test (temperature 128 ° C, pressure 10 kg / c
m 2 , time 4 seconds). For comparison, a heat seal test of the ESC nonwoven fabric used in the heat seal test 2 and the spunbond polypropylene nonwoven fabric was also conducted (Comparative Example 7). The results of these tests are shown in Table 4. From this table, it can be seen that the composite fiber having an eccentricity of 0.1 or less has a low web shrinkage ratio. It can also be seen that the heat seal strength is great.
【００２１】[0021]
【表４】 [Table 4]
【００２２】[0022]
【発明の効果】本発明の複合繊維は低温且つ短時間の熱
処理で不織布が製造でき、しかも不織布は強力が大で剛
軟度が小さく風合いがソフトである。また、この複合繊
維を使用した不織布は、ポリオレフイン系不織布に対し
短時間でヒ−トシ−ルがげき、しかもヒ−トシ−ル強力
が大である。このような不織布は、紙おむつのカバ−
材、使い捨て衣料、包帯等の分野に使用できる。INDUSTRIAL APPLICABILITY The conjugate fiber of the present invention can be manufactured into a non-woven fabric by a heat treatment at a low temperature for a short time, and the non-woven fabric has a high strength, a small bending resistance and a soft texture. A nonwoven fabric using this composite fiber has a high heat-sealing property in a short period of time compared with a polyolefin-based non-woven fabric and has a high heat-sealing strength. Such a non-woven fabric is a cover of a diaper.
It can be used in the fields of materials, disposable clothing, bandages, etc.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｄ０４Ｈ 1/42 Ｙ 7199−3Ｂ Ｋ 7199−3Ｂ 1/50 7199−3Ｂ 1/54 Ａ 7199−3Ｂ 3/00 Ｄ 7199−3Ｂ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI Technical display location D04H 1/42 Y 7199-3B K 7199-3B 1/50 7199-3B 1/54 A 7199-3B 3/00 D 7199-3B
Claims (3)
なるポリオレフイン系鞘芯型熱融着性複合繊維であっ
て、鞘成分がプロピレン８０〜９９重量％と他の１種
又は２種のαオレフイン２０〜１重量％とからなる２元
又は３元共重合体９９〜８５重量％と、融点又は軟化
点が１２５〜６０℃の飽和炭化水素ワックス１〜１５重
量％とから成ることを特徴とする複合繊維。1. A polyolefin-based sheath-core heat-fusible composite fiber comprising a low-melting point sheath component and a high-melting point core component, wherein the sheath component is 80 to 99% by weight of propylene and another one or two. A binary or ternary copolymer consisting of 20 to 1% by weight of α-olefin, and 1 to 15% by weight of a saturated hydrocarbon wax having a melting point or softening point of 125 to 60 ° C. Is a composite fiber.
次元捲縮が付与された請求項１記載の複合繊維。2. The eccentricity of the core component is 0.1 or less, and 2
The composite fiber according to claim 1, which is provided with a dimensional crimp.
量％以上含有し、繊維の交点がこの複合繊維の融着によ
り固定された不織布。3. A non-woven fabric containing 30% by weight or more of the composite fiber according to claim 1 or 2, and the intersection of the fibers is fixed by fusion bonding of the composite fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04285466A JP3109629B2 (en) | 1992-09-30 | 1992-09-30 | Polyolefin core-sheath type composite fiber and nonwoven fabric using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04285466A JP3109629B2 (en) | 1992-09-30 | 1992-09-30 | Polyolefin core-sheath type composite fiber and nonwoven fabric using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06116815A true JPH06116815A (en) | 1994-04-26 |
| JP3109629B2 JP3109629B2 (en) | 2000-11-20 |
Family
ID=17691884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04285466A Expired - Fee Related JP3109629B2 (en) | 1992-09-30 | 1992-09-30 | Polyolefin core-sheath type composite fiber and nonwoven fabric using the same |
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| Country | Link |
|---|---|
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0949166A (en) * | 1995-08-01 | 1997-02-18 | Chisso Corp | Durable hydrophilic fiber, cloth-like body and formed body |
| JPH1088459A (en) * | 1996-09-11 | 1998-04-07 | Chisso Corp | Nonwoven fabric of filament |
| JPH1088455A (en) * | 1996-09-11 | 1998-04-07 | Chisso Corp | Nonwoven fabric of filament |
| JPH10168726A (en) * | 1996-12-03 | 1998-06-23 | Chisso Corp | Filament nonwoven cloth and absorbing material using the same |
| JPH10212650A (en) * | 1997-01-22 | 1998-08-11 | Chisso Corp | Filament nonwoven cloth and absorbing material made thereof |
| JP2003293223A (en) * | 2002-03-29 | 2003-10-15 | Kuraray Co Ltd | Endothermic conjugate fiber |
| WO2010087811A1 (en) * | 2009-01-27 | 2010-08-05 | Milliken & Company | Consolidated fibrous structure |
| US8029633B2 (en) * | 2009-01-27 | 2011-10-04 | Milliken & Company | Method of forming a consolidated fibrous structure |
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| US8119549B2 (en) | 2009-01-27 | 2012-02-21 | Milliken & Company | Consolidated fibrous structure |
| CN103201416A (en) * | 2010-11-09 | 2013-07-10 | 埃克森美孚化学专利公司 | Bicomponent fibers and methods for making them |
| CN105343925A (en) * | 2011-05-20 | 2016-02-24 | 宝洁公司 | A disposable article comprising fibers of polymer-wax compositions |
| WO2017164248A1 (en) * | 2016-03-23 | 2017-09-28 | 株式会社イノアックコーポレーション | Cosmetic holding body and cosmetic container housing same |
| JP2017176816A (en) * | 2016-03-23 | 2017-10-05 | 株式会社イノアックコーポレーション | Cosmetic holding body, and cosmetic container housed with the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0949166A (en) * | 1995-08-01 | 1997-02-18 | Chisso Corp | Durable hydrophilic fiber, cloth-like body and formed body |
| JPH1088459A (en) * | 1996-09-11 | 1998-04-07 | Chisso Corp | Nonwoven fabric of filament |
| JPH1088455A (en) * | 1996-09-11 | 1998-04-07 | Chisso Corp | Nonwoven fabric of filament |
| JPH10168726A (en) * | 1996-12-03 | 1998-06-23 | Chisso Corp | Filament nonwoven cloth and absorbing material using the same |
| JPH10212650A (en) * | 1997-01-22 | 1998-08-11 | Chisso Corp | Filament nonwoven cloth and absorbing material made thereof |
| JP2003293223A (en) * | 2002-03-29 | 2003-10-15 | Kuraray Co Ltd | Endothermic conjugate fiber |
| US8114507B2 (en) | 2009-01-27 | 2012-02-14 | Milliken & Company | Multi-layered fiber |
| US8029633B2 (en) * | 2009-01-27 | 2011-10-04 | Milliken & Company | Method of forming a consolidated fibrous structure |
| WO2010087811A1 (en) * | 2009-01-27 | 2010-08-05 | Milliken & Company | Consolidated fibrous structure |
| US8119549B2 (en) | 2009-01-27 | 2012-02-21 | Milliken & Company | Consolidated fibrous structure |
| CN103201416A (en) * | 2010-11-09 | 2013-07-10 | 埃克森美孚化学专利公司 | Bicomponent fibers and methods for making them |
| JP2014502315A (en) * | 2010-11-09 | 2014-01-30 | エクソンモービル ケミカル パテンツ インコーポレイテッド | Bicomponent fibers and methods for making them |
| CN105343925A (en) * | 2011-05-20 | 2016-02-24 | 宝洁公司 | A disposable article comprising fibers of polymer-wax compositions |
| US11339514B2 (en) | 2011-05-20 | 2022-05-24 | The Procter & Gamble Company | Fibers of polymer-wax compositions |
| WO2017164248A1 (en) * | 2016-03-23 | 2017-09-28 | 株式会社イノアックコーポレーション | Cosmetic holding body and cosmetic container housing same |
| JP2017176816A (en) * | 2016-03-23 | 2017-10-05 | 株式会社イノアックコーポレーション | Cosmetic holding body, and cosmetic container housed with the same |
| JP2021104351A (en) * | 2016-03-23 | 2021-07-26 | 株式会社イノアックコーポレーション | Cosmetic holding body, and cosmetic container housed with the same |
| CN111133141A (en) * | 2017-09-29 | 2020-05-08 | 东洋铝爱科制造株式会社 | Nonwoven fabric, filter using the same, and method for producing nonwoven fabric |
| JP2023092566A (en) * | 2021-12-22 | 2023-07-04 | 株式会社Tbm | nonwoven fabric |
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