JPH0849166A - Polypropylene fiber - Google Patents
Polypropylene fiberInfo
- Publication number
- JPH0849166A JPH0849166A JP20011494A JP20011494A JPH0849166A JP H0849166 A JPH0849166 A JP H0849166A JP 20011494 A JP20011494 A JP 20011494A JP 20011494 A JP20011494 A JP 20011494A JP H0849166 A JPH0849166 A JP H0849166A
- Authority
- JP
- Japan
- Prior art keywords
- polypropylene
- polypropylene fiber
- hydrocarbons
- fiber
- strength
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は熱接着型のポリプロピレ
ン製不織布用の原料として好適なポリプロピレン繊維に
関する。更に詳しくは、不織布に加工する際にカードで
の通過性が良好で、かつ低温接着性と広い加工温度幅を
具備した、熱ロール加工適性に優れたポリプロピレン繊
維に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polypropylene fiber suitable as a raw material for a heat-bondable polypropylene nonwoven fabric. More specifically, the present invention relates to a polypropylene fiber which has good passability through a card when processed into a non-woven fabric, has low-temperature adhesiveness and has a wide processing temperature range and is excellent in heat roll processability.
【０００２】[0002]
【従来の技術】熱接着型の不織布は、バインダーが不要
であるため設備上、経済上、および衛生上などの利点か
ら広く使われている。なかでもポリオレフィン系の不織
布は性能及び経済性に優れるため、紙おむつ・生理用品
の表面材、手術着等の医療・衛生資材、あるいは土木資
材、農業資材、工業資材等の多くの分野で使用されてお
り、ポリエチレン／ポリプロピレンの複合繊維及びポリ
プロピレン単一繊維がその原料繊維となる。熱接着型の
不織布の製造方法は、熱風を用いるエアスルー法と熱ロ
ール法に大別される。このうちエアスルー法はポリエチ
レン／ポリプロピレン複合繊維に好ましく適用される。
エアスルー法による不織布は強くて柔軟であるが、加工
速度が熱ロール法に比べて遅く、生産性が悪い。また、
ポリエチレン／ポリプロピレン複合繊維を用いるので、
ポリエチレン特有のワキシー感があるという欠点もあ
る。これに対し熱ロール法は、加工速度が速く生産性が
高いこと、熱圧着による接着のためポリプロピレン単一
繊維でも不織布化が可能であり、ポリエチレンに起因す
るワキシー感がない等の利点を有している。2. Description of the Related Art Non-woven fabrics of thermal bonding type are widely used because they do not require a binder and are advantageous in terms of equipment, economy and hygiene. Among them, polyolefin non-woven fabrics are excellent in performance and economic efficiency, so they are used in many fields such as surface materials for diapers and sanitary products, medical and hygiene materials such as surgical clothes, civil engineering materials, agricultural materials, industrial materials, etc. Therefore, polyethylene / polypropylene composite fibers and polypropylene single fibers are the raw material fibers. The method for producing a heat-bonding type nonwoven fabric is roughly classified into an air-through method using hot air and a hot roll method. Of these, the air-through method is preferably applied to polyethylene / polypropylene composite fibers.
The nonwoven fabric produced by the air-through method is strong and flexible, but its processing speed is slower than that of the hot roll method, resulting in poor productivity. Also,
Since polyethylene / polypropylene composite fiber is used,
It also has the disadvantage that it has a waxy feel peculiar to polyethylene. On the other hand, the hot roll method has the advantages that the processing speed is high and the productivity is high, and that polypropylene single fiber can be made into a non-woven fabric due to adhesion by thermocompression bonding, and there is no waxy feeling due to polyethylene. ing.
【０００３】しかしながら、強力と柔軟な風合を兼備す
るポリプロピレン製不織布を熱ロール法により製造する
事は困難とされている。その理由は、以下の通りであ
る。ポリプロピレン製不織布を熱ロールを用いて製造す
るには、ポリプロピレン繊維間の融着結合を良好にする
必要があるが、そのためにはポリプロピレン繊維が融着
結合時に十分軟化する高い温度で不織布を製造する必要
がある。しかし、高い温度で不織布を製造すると、結合
点がフィルム状に変形し、結合点以外のポリプロピレン
繊維も熱の影響を受けることにより風合が悪化する。ま
た、低い温度で加工すると結合点の融着が不足し、実用
に耐える強力が得られない。このため、強力がありかつ
柔軟な風合を有するポリプロピレン製不織布が得られる
温度範囲が非常に狭く、少しの加工温度の変化で強力が
弱くなったり、風合が堅くなってしまう。このため、柔
らかく強いポリプロピレン不織布を得るための加工温度
幅が広く、熱ロール法に適したポリプロピレン繊維の開
発が待ち望まれている。However, it is difficult to produce a polypropylene non-woven fabric having a strong and flexible texture by the hot roll method. The reason is as follows. In order to produce a polypropylene non-woven fabric using a hot roll, it is necessary to improve the fusion bond between the polypropylene fibers. For that purpose, the polypropylene fiber is produced at a high temperature at which the polypropylene fiber is sufficiently softened during the fusion bond. There is a need. However, when a non-woven fabric is manufactured at a high temperature, the bonding points are deformed into a film shape, and the polypropylene fibers other than the bonding points are also affected by heat, resulting in poor texture. Further, if the processing is performed at a low temperature, the fusion of the bonding points becomes insufficient, and the strength for practical use cannot be obtained. For this reason, the temperature range in which a polypropylene non-woven fabric having a strong and soft texture can be obtained is very narrow, and even a slight change in the processing temperature weakens the strength or hardens the texture. Therefore, a wide range of processing temperatures for obtaining a soft and strong polypropylene non-woven fabric, and development of polypropylene fibers suitable for the hot roll method has been awaited.
【０００４】特開昭６２−１５６３１０号には、熱ロー
ル法に適したポリプロピレン繊維として、軟化点が１３
２℃以下であって所定量のエチレンを含有したエチレン
−プロピレンランダム共重合体よりなるポリプロピレン
繊維が提案されているが、この繊維は、風合が堅く、実
用に即する強力と風合を持った不織布を製造できる加工
温度幅が極めて狭いという欠点がある。また特開平２−
１１２４５６号には、特定のアイソタクチックペンタッ
ド分率を有する低立体規則性のポリプロピレン繊維より
なる不織布が提案されている。この不織布は、良好な風
合を有しているが、強力が充分ではない。また、一般に
このような低立体規則性のポリプロピレンよりなる繊維
はカーディング特性が悪く、不織布製造の上で大きな問
題を生じる等の欠点を有している。更に、特開平２−２
６４０１２号には特定の化合物を配合したポリプロピレ
ン繊維が提案されているが、風合、強力共に充分ではな
い。JP-A-62-156310 discloses a polypropylene fiber suitable for the hot roll method, which has a softening point of 13
A polypropylene fiber composed of an ethylene-propylene random copolymer containing 2 ° C or less and a predetermined amount of ethylene has been proposed, but this fiber has a firm texture and has a strength and texture suitable for practical use. However, there is a drawback that the processing temperature range for producing such a nonwoven fabric is extremely narrow. In addition, JP-A-2-
No. 112456 proposes a non-woven fabric made of low stereoregular polypropylene fibers having a specific isotactic pentad fraction. This non-woven fabric has a good texture, but is not sufficiently strong. In general, fibers made of such low stereoregular polypropylene have poor carding properties, and have drawbacks such as a great problem in the production of nonwoven fabrics. Furthermore, Japanese Patent Laid-Open No. 2-2
No. 64012 proposes a polypropylene fiber containing a specific compound, but the feel and strength are not sufficient.
【０００５】[0005]
【発明が解決しようとする課題】このように、強力と風
合が共に優れたポリプロピレン製不織布を熱ロール加工
により提供しようとする試みは数多く行われているが、
製造される不織布の性能も充分ではなく、また製造時の
加工温度幅も狭く、満足のいくポリプロピレン繊維はい
まだ開発されていない。本発明の目的は、熱ロール加工
により高強力で、柔軟な高風合のポリプロピレン製不織
布を容易に製造でき、かつ加工温度幅の広い、熱ロール
加工に適した優れたポリプロピレン繊維を提供する事に
ある。As described above, many attempts have been made to provide a polypropylene nonwoven fabric excellent in both strength and texture by hot roll processing.
Satisfactory polypropylene fibers have not yet been developed because the performance of the produced nonwoven fabric is not sufficient and the processing temperature range during production is narrow. An object of the present invention is to provide an excellent polypropylene fiber suitable for hot roll processing, which is capable of easily producing a polypropylene nonwoven fabric having high strength and high flexibility by a heat roll processing, and having a wide processing temperature range. It is in.
【０００６】[0006]
【問題を解決するための手段】本発明者らは、上記課題
を解決すべく鋭意検討を重ねた結果、複屈折率が０．０
５４以下である低配向性のポリプロピレン繊維に鉱物油
を主体とする油剤を付着させたものが、低い加工温度域
でも所期の目的とする高い強力と柔軟性を示す不織布を
与えることを知り、本発明を完成するに至った。本発明
は、次の構成を有する。 （１）複屈折率が０．０５４以下である低配向性のポリ
プロピレン繊維に、鉱物油を主体とした油剤を０．１〜
１．０重量％付着させたポリプロピレン繊維。 （２）ポリプロピレンがプロピレンを主体とするオレフ
ィン系の二元共重合体または三元共重合体である（１）
に記載のポリプロピレン繊維。 （３）鉱物油がパラフィン系炭化水素、オレフィン系炭
化水素、ナフテン系炭化水素、芳香族系炭化水素、及び
それらの誘導体からなる群から選ばれた少なくとも１種
である（１）または（２）に記載のポリプロピレン繊
維。The inventors of the present invention have conducted extensive studies to solve the above problems, and as a result, have a birefringence of 0.0
Knowing that a low-orientation polypropylene fiber of 54 or less and an oil agent mainly composed of mineral oil attached to it gives a non-woven fabric exhibiting the desired high strength and flexibility even in a low processing temperature range, The present invention has been completed. The present invention has the following configuration. (1) A low orientation polypropylene fiber having a birefringence of 0.054 or less and 0.1 to 0.1% of an oil agent mainly composed of mineral oil.
Polypropylene fiber with 1.0% by weight attached. (2) Polypropylene is an olefin-based binary or terpolymer mainly containing propylene (1)
The polypropylene fiber described in. (3) The mineral oil is at least one selected from the group consisting of paraffinic hydrocarbons, olefinic hydrocarbons, naphthenic hydrocarbons, aromatic hydrocarbons, and derivatives thereof (1) or (2). The polypropylene fiber described in.
【０００７】以下、本発明を詳細に説明する。本発明に
おいてポリプロピレン繊維とは、プロピレンの単独重合
体、プロピレンを主体ととするオレフィン系の二元重合
体または三元共重合体からなる繊維をいう。ここでプロ
ピレンを主体とするオレフィン系二元共重合体として
は、８５％以上のプロピレンと１５％以下のエチレンと
のランダム共重合体、あるいは５０％以上のプロピレン
と５０％以下のブテン−１とのランダム共重合体を例示
できる。またプロピレンを主体とするオレフィン系三元
共重合体としては、８５％以上のプロピレン、１０％以
下のエチレン及び１５％未満のブテン−１からなるラン
ダム共重合体を例示できる。Hereinafter, the present invention will be described in detail. In the present invention, the polypropylene fiber means a fiber made of a propylene homopolymer, an olefin-based binary polymer or a terpolymer mainly containing propylene. Here, the olefin-based binary copolymer mainly composed of propylene includes a random copolymer of 85% or more propylene and 15% or less ethylene, or 50% or more propylene and 50% or less butene-1. The random copolymer of can be illustrated. Examples of the olefin-based terpolymer mainly containing propylene include a random copolymer composed of 85% or more propylene, 10% or less ethylene and less than 15% butene-1.
【０００８】本発明のポリプロピレン繊維は、複屈折率
が０．０５４以下となるような低い分子配向度に製造さ
れている。このような低い配向度は、紡糸時に行われる
延伸倍率を通常行われる約４倍以上より低く、３倍以下
に抑えることにより得られ、好ましくは、２．５倍以
下、より好ましくは２．０倍以下で延伸したものが用い
られる。延伸倍率が３．０倍を超えると、分子配向度が
高くなり、熱軟化点、及び融点が上昇し、熱接着性が低
下する。また、分子配向度が高くなると、後述する油剤
の繊維内への浸透吸着の作用効果が十分得られない。The polypropylene fiber of the present invention is manufactured with a low degree of molecular orientation such that the birefringence is 0.054 or less. Such a low degree of orientation is obtained by suppressing the draw ratio performed during spinning to less than about 4 times which is usually performed and 3 times or less, preferably 2.5 times or less, and more preferably 2.0 times or less. What is stretched by a factor of 2 or less is used. When the draw ratio exceeds 3.0 times, the degree of molecular orientation increases, the thermal softening point and the melting point increase, and the thermal adhesiveness decreases. Further, if the degree of molecular orientation becomes high, the effect of permeation and adsorption of the oil agent into the fiber described later cannot be sufficiently obtained.
【０００９】本発明で用いる油剤の主成分である鉱物油
としては、流動パラフィンで代表されるパラフィン系炭
化水素、オレフィン系炭化水素、ナフテン系炭化水素、
芳香族系炭化水素を例示することができる。ここで主成
分とは、油剤の２０％〜９０％を占めることを意味し、
鉱物油以外の成分として制電剤、乳化剤等を配合する。
これらには、例えばソルビタンモノラウレート、ポリオ
キシエチレンラウリルエーテル、オクチルトリメチルア
ンモニウムジメチルホスフェート、ジオクチルスルホサ
クシネート等がある。さらに、このような油剤には、本
他発明の効果を妨げない範囲において、動物性油脂、植
物性油脂などを配合することができる。本発明において
ポリプロピレン繊維への油剤の付着量は０．１〜１．０
重量％、好ましくは０．２〜０．５重量％の範囲であ
る。油剤の付着量が０．１重量％未満であると、カード
工程での制電性が不良となりウエブに地合斑が発生しや
すくなる。ウエブの地合斑の発生を避けるためにはライ
ンスピードを低速にする必要があり、経済的でない。ま
たゆざいの付着量が少ないとポリプロピレン繊維表層へ
の油剤の浸透量が不十分となり、鉱物油で膨潤したスキ
ン層は形成されにくくなり熱接着性の向上が妨げられ
る。油剤付着量の上限は１．０重量％が望ましい。油剤
付着量が１．０重量％を超すと、繊維強度の低下、捲縮
保持率の低下、繊維表面の軟化によるカード通過性の悪
化等が生じるので好ましくない。繊維に油剤を付着させ
る方法としては、繊維紡糸工程でのタッチロールによる
方法、延伸工程でのタッチロールによる方法、機械捲縮
加工後に噴霧する方法等の公知の方法を用いる事ができ
る。Mineral oil which is a main component of the oil agent used in the present invention includes paraffin hydrocarbons represented by liquid paraffin, olefin hydrocarbons, naphthene hydrocarbons,
Aromatic hydrocarbons can be exemplified. Here, the main component means occupying 20% to 90% of the oil agent,
Antistatic agents, emulsifiers, etc. are added as ingredients other than mineral oil.
These include, for example, sorbitan monolaurate, polyoxyethylene lauryl ether, octyl trimethyl ammonium dimethyl phosphate, dioctyl sulfosuccinate and the like. Furthermore, animal oils, vegetable oils and the like can be added to such oily agents within a range that does not impair the effects of the present invention. In the present invention, the amount of the oil agent attached to the polypropylene fiber is 0.1 to 1.0.
%, Preferably 0.2 to 0.5% by weight. If the amount of the oil agent adhered is less than 0.1% by weight, the antistatic property in the card process becomes poor, and unevenness of the web is likely to occur. The line speed must be low in order to avoid the formation of web unevenness, which is not economical. If the amount of adhesion of the strain is small, the permeation amount of the oil agent into the polypropylene fiber surface layer will be insufficient, and the skin layer swollen with mineral oil will be hard to be formed, and the improvement of the thermal adhesiveness will be hindered. The upper limit of the amount of attached oil agent is preferably 1.0% by weight. When the amount of the attached oil agent exceeds 1.0% by weight, the fiber strength is lowered, the crimp retention is lowered, and the card surface is deteriorated due to the softening of the fiber surface, which is not preferable. As a method of attaching the oil agent to the fibers, known methods such as a method using a touch roll in the fiber spinning step, a method using a touch roll in the drawing step, and a method of spraying after mechanical crimping can be used.
【００１０】通常、熱ロール接着法によって得られる不
織布の引張強度は、繊維の結合点が十分に強固である場
合には、熱接着性繊維の単糸強度に大きく依存する。一
方、結合点が脆弱な場合には、不織布の破断は結合点の
破壊によって起こるので、不織布の引張強度は単糸強度
にはほとんど影響されず、しかもその値は非常に小さ
い。本発明のポリプロピレン繊維では、付着させた油剤
中の鉱物油がポリプロピレン繊維表面から表層部へ拡散
移行し鉱物油を含有するスキン層が形成され、複屈折率
が０．０５４以下となるように分子配向を抑制すること
により、浸透作用を促進させている。鉱物油で膨潤した
スキン層はコア層に比べ密度が低く、軟化点が低い。こ
の結果、低い温度で軟化し、コア層の強度への影響の無
い低い加工温度で繊維接点を融着結合することができ、
高い不織布強力が得られる。Usually, the tensile strength of a non-woven fabric obtained by the heat roll bonding method largely depends on the single yarn strength of the heat bonding fiber when the bonding points of the fibers are sufficiently strong. On the other hand, when the bond point is fragile, the breaking of the nonwoven fabric is caused by the breaking of the bond point. Therefore, the tensile strength of the nonwoven fabric is hardly affected by the single yarn strength, and its value is very small. In the polypropylene fiber of the present invention, the mineral oil in the adhered oil agent diffuses and migrates from the polypropylene fiber surface to the surface layer portion to form a skin oil-containing skin layer, and the birefringence is controlled to 0.054 or less. By suppressing the orientation, the penetration effect is promoted. The skin layer swollen with mineral oil has a lower density and a lower softening point than the core layer. As a result, the fiber contacts can be softened at a low temperature, and the fiber contacts can be fusion-bonded at a low processing temperature without affecting the strength of the core layer.
High nonwoven fabric strength can be obtained.
【００１１】[0011]
【実施例】以下実施例により本発明を具体的に説明する
が、本発明は実施例のみに限定されるものではない。な
お、実施例中における各種の物性値の測定は以下の方法
で行った。 ・メルトフローレート（ＭＦＲ）：ＡＳＴＭ Ｄ １２
３８の条件（Ｌ）に準拠して測定した。 ・不織布強力：目付け重量２０ｇ／ｍ2の不織布より切
り取った幅５ｃｍ、長さ１５ｃｍの試験片を、引張試験
機を用いて、試験片のつかみ間隔１０ｃｍ、引張速度１
０ｃｍ／分の条件で試験し、破断強力を測定した。EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to the examples. In addition, various physical property values in the examples were measured by the following methods. Melt flow rate (MFR): ASTM D 12
It measured based on 38 conditions (L). -Nonwoven fabric strength: A test piece having a width of 5 cm and a length of 15 cm cut from a non-woven fabric having a basis weight of 20 g / m 2 was squeezed by a tensile tester at a gripping interval of 10 cm and a pulling speed of 1
The test was carried out under the condition of 0 cm / min to measure the breaking strength.
【００１２】・柔軟性：ＪＩＳ Ｌ１０１８ （６．２
１Ａ項）に準拠して測定した。一辺が４５度の傾斜を持
つ表面が滑らかでスケールが目盛られている水平台（カ
ンチレバー型試験機）の上に目付け重量２０ｇ／ｍ2の
不織布より切り出した縦５ｃｍ、横１５ｃｍの試験片を
スケールに合わせて置き、手動により不織布を斜面の方
向へ穏やかに滑らせて、不織布の一端が斜面と接したと
きの繰り出し量をｍｍ単位で読みとり、この数値を柔軟
性の指標とした。この値が小さいほど不織布の柔軟性が
良好な事を示す。柔軟性値が３０ｍｍ以下では不織布の
風合いが良好である。、柔軟性値が３０ｍｍを超えた織
布は風合が硬く、皮膚に直接接触させて使用する衛生材
料用途には使用できない。 ・加工温度幅：柔軟性値３０ｍｍ以下、不織布強力０．
６ｋｇ／５ｃｍ以上の性能を具備した不織布が得られる
熱ロールの温度幅である。例えば、１３０℃から１４０
℃の範囲でこの条件を満たす不織布が得られるなら加工
温度幅は１０℃である。 ・低温加工性：柔軟性値が２４ｍｍの不織布が得られ易
い加工温度の１３４℃で作成した試料の不織布強力で示
した。０．６ｋｇ／５ｃｍ以上が必要である。 ・油剤付着率：１０ｇの試料をソックスレー抽出器を用
い、メタノール／石油エーテル＝１／１の混合溶媒で３
時間還流抽出し、溶剤を除去後重量を測定した。 ・複屈折率：偏光顕微鏡を用い、コンペンセーターによ
る測定を行った。Flexibility: JIS L1018 (6.2
It measured based on 1A item). On a horizontal table (cantilever type tester) with a smooth surface with 45 degree inclination on one side and a scale, a scale of 5 cm in length and 15 cm in width cut out from a nonwoven fabric with a basis weight of 20 g / m 2 The non-woven fabric was gently slid in the direction of the slope, and the amount of payout when one end of the non-woven fabric was in contact with the slope was read in mm, and this value was used as an index of flexibility. The smaller this value is, the better the flexibility of the nonwoven fabric is. When the flexibility value is 30 mm or less, the texture of the nonwoven fabric is good. A woven fabric having a flexibility value of more than 30 mm has a hard texture and cannot be used for sanitary materials in which it is used in direct contact with the skin. -Processing temperature range: flexibility value of 30 mm or less, strength of non-woven fabric is 0.
It is the temperature width of the heat roll that can obtain a nonwoven fabric having a performance of 6 kg / 5 cm or more. For example, from 130 ℃ to 140
If a nonwoven fabric satisfying this condition is obtained in the range of ° C, the processing temperature range is 10 ° C. Low temperature processability: The strength of the non-woven fabric of the sample prepared at a processing temperature of 134 ° C. at which a non-woven fabric having a flexibility value of 24 mm was easily obtained. 0.6 kg / 5 cm or more is required.・ Oil agent adhesion rate: A 10 g sample was used in a Soxhlet extractor and mixed with a mixed solvent of methanol / petroleum ether = 1/1 to 3
After extraction under reflux for an hour, the solvent was removed and the weight was measured. -Birefringence: measured with a compensator using a polarizing microscope.
【００１２】（実施例１、２、比較例１）ＭＦＲ２５の
ポリプロピレンを用いて、３１０℃の紡糸温度で繊維を
溶融紡糸した。紡糸直後の引き取り工程で、表３・４に
記載した油剤をタッチロールにより付着させた。紡糸後
４０℃の熱ロールにて１．５倍に延伸し、スタファボッ
クスで機械捲縮を付与し、乾燥後切断して２ｄ×３８ｍ
ｍのポリプロピレン短繊維を作成した。この短繊維をロ
ーラーカード機にて２０ｍ／ｍｉｎの速度でカーディン
グし、目付け重量２０ｇ／ｍ2のウェブとした。続いて
同一速度にてウェブを接着面積率２４％のエンボスロー
ルで不織布に加工した。エンボスロールの加熱温度は１
３０℃〜１４５℃の範囲で０．５（ｄｅｇ）きざみで変
化させ、各加熱温度で得られた不織布より所定の試験片
を作成し、不織布強力および柔軟性を測定し、０．６ｋ
ｇ／５ｃｍ以上の不織布強力が得られる加工温度幅を求
めた。各例のこれらの値をカード通過性を併せて表１・
２に示す。実施例１及び実施例２では、加工温度幅も広
く、カード通過性も良好であり、低温で加工しても不織
布強力が高く風合いの良いものであった。比較例１で
は、１３４℃での不織布強力が低く、加工温度幅も狭い
ものであった。また、静電気の発生がひどく、カード通
過性は不良であった。(Examples 1, 2 and Comparative Example 1) Using polypropylene of MFR25, fibers were melt-spun at a spinning temperature of 310 ° C. In the take-up step immediately after spinning, the oil agents shown in Tables 3 and 4 were attached by a touch roll. After spinning, it is stretched 1.5 times on a hot roll at 40 ° C, mechanical crimped with a stuffer box, dried and cut to 2d x 38m.
m polypropylene short fibers were prepared. This short fiber was carded with a roller card machine at a speed of 20 m / min to obtain a web having a basis weight of 20 g / m 2 . Subsequently, the web was processed into a non-woven fabric with an embossing roll having an adhesion area ratio of 24% at the same speed. The heating temperature of the embossing roll is 1
A predetermined test piece was prepared from the non-woven fabric obtained at each heating temperature by changing it in steps of 0.5 (deg) in the range of 30 ° C. to 145 ° C., and the non-woven fabric strength and flexibility were measured to be 0.6 k.
The processing temperature range for obtaining a nonwoven fabric strength of g / 5 cm or more was determined. These values for each example are shown in Table 1 along with the card passability.
It is shown in FIG. In Examples 1 and 2, the processing temperature range was wide, the card passing property was good, and the nonwoven fabric had high strength and good texture even when processed at low temperature. In Comparative Example 1, the strength of the nonwoven fabric at 134 ° C. was low, and the processing temperature range was narrow. In addition, the generation of static electricity was severe, and the card passability was poor.
【００１３】比較例２ 表２中に示したように油剤を代えた以外は実施例１と同
様にして不織布を作成し、その特性を測定した。得られ
た不織布は強力が低く、風合い、カード通過性、加工温
度幅のいずれもが不満足なものであった。 実施例３ 延伸倍率を３倍とした以外は実施例１と同様にして不織
布を作成し、その特性を測定した。不織布強力が高く、
風合い、カード通過性、加工温度幅も満足のいくもので
あった。 比較例３ 延伸倍率を４倍とした以外は実施例１と同様にして不織
布を作成し、その特性を測定したじ。実施例１と同じ油
剤を付着させたが、複屈折率が０．０６２であり配向度
が高いのためスキン層が形成されず、不織布強力が低く
加工温度幅も狭く、満足する不織布は得られなかった。Comparative Example 2 A non-woven fabric was prepared in the same manner as in Example 1 except that the oil agent was changed as shown in Table 2, and its characteristics were measured. The obtained non-woven fabric had low strength and was unsatisfactory in texture, card passing property, and processing temperature range. Example 3 A nonwoven fabric was prepared in the same manner as in Example 1 except that the draw ratio was set to 3, and the characteristics of the nonwoven fabric were measured. Nonwoven fabric has high strength,
The texture, card passage property, and processing temperature range were also satisfactory. Comparative Example 3 A non-woven fabric was prepared in the same manner as in Example 1 except that the stretching ratio was 4, and the characteristics were measured. Although the same oil agent as in Example 1 was applied, a skin layer was not formed due to the birefringence of 0.062 and the degree of orientation was high, and the strength of the nonwoven fabric was low and the processing temperature range was narrow, and a satisfactory nonwoven fabric was obtained. There wasn't.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】[0016]
【表３】 [Table 3]
【００１７】[0017]
【表４】 [Table 4]
【００１８】一般に不織布強力は加工温度が高いほど大
きくなる。しかし、不織布の風合いは加工温度が高いほ
ど悪くなる。高風合を示す柔軟性値の上限は３０ｍｍで
あることが過去の実験から知られている。したがって、
高風合いの不織布を得るための加工温度の上限は、柔軟
性値３０ｍｍに対応する温度となる。表１・２から明ら
かなように、本発明のポリプロピレン繊維は、目標とす
る不織布強力（０．６ｋｇ／５ｃｍ）を得られる加工温
度の下限が低く、柔軟性値３０ｍｍに対応する加工温度
の上限とで規定される不織布の製造加工温度幅が著しく
広い。Generally, the strength of a nonwoven fabric increases as the processing temperature increases. However, the texture of the nonwoven fabric becomes worse as the processing temperature becomes higher. It has been known from past experiments that the upper limit of the flexibility value indicating a high feeling is 30 mm. Therefore,
The upper limit of the processing temperature for obtaining a nonwoven fabric having a high texture is a temperature corresponding to a flexibility value of 30 mm. As is apparent from Tables 1 and 2, the polypropylene fiber of the present invention has a low lower limit of processing temperature at which a target nonwoven fabric strength (0.6 kg / 5 cm) can be obtained, and an upper limit of processing temperature corresponding to a flexibility value of 30 mm. The manufacturing process temperature range of the non-woven fabric specified by and is remarkably wide.
【００１９】[0019]
【発明の効果】本発明のポリプロピレン繊維は、熱ロー
ル加工により高強力、柔軟な高風合のポリプロピレン製
不織布を製造する事が出来、かつ、従来より低い加工温
度でも強力が高い不織布が得られ、加工温度幅が広いの
でその製造が容易である。EFFECTS OF THE INVENTION The polypropylene fiber of the present invention is capable of producing a polypropylene non-woven fabric having high strength, flexibility and high feeling by hot roll processing, and a non-woven fabric having high tenacity even at a lower processing temperature than before. Since the processing temperature range is wide, its manufacturing is easy.
Claims (3)
性のポリプロピレン繊維に、鉱物油を主体とした油剤が
０．１〜１．０重量％付着されたポリプロピレン繊維。1. A polypropylene fiber in which 0.1 to 1.0% by weight of an oil agent mainly composed of mineral oil is adhered to low orientation polypropylene fiber having a birefringence of 0.054 or less.
するオレフィン系の二元共重合体または三元共重合体で
ある請求項１に記載のポリプロピレン繊維。2. The polypropylene fiber according to claim 1, wherein the polypropylene is an olefin-based binary or terpolymer mainly containing propylene.
フィン系炭化水素、ナフテン系炭化水素、芳香族系炭化
水素、及びそれらの誘導体からなる群から選ばれた少な
くとも１種である請求項１または請求項２に記載のポリ
プロピレン繊維。3. The mineral oil is at least one selected from the group consisting of paraffin hydrocarbons, olefin hydrocarbons, naphthene hydrocarbons, aromatic hydrocarbons, and derivatives thereof, or The polypropylene fiber according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20011494A JP3345764B2 (en) | 1994-08-01 | 1994-08-01 | Polypropylene fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20011494A JP3345764B2 (en) | 1994-08-01 | 1994-08-01 | Polypropylene fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0849166A true JPH0849166A (en) | 1996-02-20 |
| JP3345764B2 JP3345764B2 (en) | 2002-11-18 |
Family
ID=16419068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20011494A Expired - Fee Related JP3345764B2 (en) | 1994-08-01 | 1994-08-01 | Polypropylene fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3345764B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997021856A1 (en) * | 1995-12-14 | 1997-06-19 | Chisso Corporation | Polypropylene fiber, a method for manufacture thereof, and a non-woven fabric made of the same |
| WO1997040216A1 (en) * | 1996-04-25 | 1997-10-30 | Chisso Corporation | Polyolefin fibers and nonwoven fabric produced using the same |
| WO2006057369A1 (en) * | 2004-11-26 | 2006-06-01 | Mitsui Chemicals, Inc. | Polypropylene nonwoven fabric and use thereof |
| US7297395B2 (en) | 2002-07-30 | 2007-11-20 | Kimberly-Clark Worldwide, Inc. | Superabsorbent materials having low, controlled gel-bed friction angles and composites made from the same |
| CN100352990C (en) * | 2001-09-21 | 2007-12-05 | 纺粘无纺布(深圳)有限公司 | Process and for producing Jinlun Non-wowen cloth by spinning-bonding method its device and jinlun non-woven cloth products |
| JP2010065375A (en) * | 2002-12-10 | 2010-03-25 | Dsm Ip Assets Bv | Process for converting polyolefin fibers into semi-finished or end-use product, semi-finished or end-use product obtainable by the process, using the semi-finished or end-use product in medical application, biomedical product including the semi-finished or end-use product, or use of composition as spin finish in process for making polyolefin fibers or for converting polyolefin fibers into semi-finished or end-use product |
-
1994
- 1994-08-01 JP JP20011494A patent/JP3345764B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5906890A (en) * | 1995-12-14 | 1999-05-25 | Chisso Corporation | Polypropylene fiber, a method for manufacture thereof, and a non-woven fabric made of the same |
| CN1070936C (en) * | 1995-12-14 | 2001-09-12 | 智索股份有限公司 | Polypropylene fiber, a method for manufacture thereof, and a non-woven fabric made of the same |
| WO1997021856A1 (en) * | 1995-12-14 | 1997-06-19 | Chisso Corporation | Polypropylene fiber, a method for manufacture thereof, and a non-woven fabric made of the same |
| WO1997040216A1 (en) * | 1996-04-25 | 1997-10-30 | Chisso Corporation | Polyolefin fibers and nonwoven fabric produced using the same |
| CN1077924C (en) * | 1996-04-25 | 2002-01-16 | 智索公司 | Polyolefin fibers and nonwoven fabric produced using the same |
| JP3332930B2 (en) * | 1996-04-25 | 2002-10-07 | チッソ株式会社 | Polyolefin fiber and nonwoven fabric using the same |
| CN100352990C (en) * | 2001-09-21 | 2007-12-05 | 纺粘无纺布(深圳)有限公司 | Process and for producing Jinlun Non-wowen cloth by spinning-bonding method its device and jinlun non-woven cloth products |
| US7297395B2 (en) | 2002-07-30 | 2007-11-20 | Kimberly-Clark Worldwide, Inc. | Superabsorbent materials having low, controlled gel-bed friction angles and composites made from the same |
| JP2010065375A (en) * | 2002-12-10 | 2010-03-25 | Dsm Ip Assets Bv | Process for converting polyolefin fibers into semi-finished or end-use product, semi-finished or end-use product obtainable by the process, using the semi-finished or end-use product in medical application, biomedical product including the semi-finished or end-use product, or use of composition as spin finish in process for making polyolefin fibers or for converting polyolefin fibers into semi-finished or end-use product |
| WO2006057369A1 (en) * | 2004-11-26 | 2006-06-01 | Mitsui Chemicals, Inc. | Polypropylene nonwoven fabric and use thereof |
| US7585796B2 (en) | 2004-11-26 | 2009-09-08 | Mitsui Chemicals, Inc. | Polypropylene nonwoven fabric and use thereof |
| US7674734B2 (en) | 2004-11-26 | 2010-03-09 | Mitsui Chemicals, Inc. | Polypropylene nonwoven fabric and use thereof |
| JPWO2006057369A1 (en) * | 2004-11-26 | 2008-06-05 | 三井化学株式会社 | Polypropylene nonwoven fabric and its use |
| JP4860483B2 (en) * | 2004-11-26 | 2012-01-25 | 三井化学株式会社 | Polypropylene nonwoven fabric and its use |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3345764B2 (en) | 2002-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI359220B (en) | Improved fibers for polyethylene nonwoven fabric a | |
| JP3261728B2 (en) | Thermal adhesive fiber sheet | |
| JP2000507654A (en) | Polypropylene fibers and products made therefrom | |
| JPH0137505B2 (en) | ||
| JPH0874128A (en) | Heat-fusible conjugated fiber and nonwoven fabric using the same | |
| EP0959165A1 (en) | Flexible laminate of nonwoven fabrics | |
| JP4251380B2 (en) | Elastic elastic nonwoven fabric | |
| CN110914359A (en) | Polypropylene resin composition, and fiber and nonwoven fabric using same | |
| JP3109629B2 (en) | Polyolefin core-sheath type composite fiber and nonwoven fabric using the same | |
| JPH04506097A (en) | Polypropylene/polyethylene binary bonded fiber | |
| JPH0849166A (en) | Polypropylene fiber | |
| JP3525536B2 (en) | Modified polyolefin fiber and nonwoven fabric using the same | |
| JP2872542B2 (en) | Thermally bonded nonwoven fabric and method for producing the same | |
| JP2872543B2 (en) | Thermally bonded nonwoven fabric and method for producing the same | |
| JP4507389B2 (en) | Polyolefin fiber and nonwoven fabric and absorbent article using the same | |
| JP3790459B2 (en) | Thermal adhesive composite fiber and method for producing the same, and nonwoven fabric and synthetic paper using the same | |
| JPH04316608A (en) | Thermo-splittable conjugated fiber | |
| JP3124017B2 (en) | Thermal adhesive fibers and nonwovens | |
| JP4694204B2 (en) | Spunbond nonwoven fabric, laminate using the same, and production method thereof | |
| JPH04163315A (en) | Divided type conjugate fiber | |
| JP3790460B2 (en) | Thermal adhesive composite fiber, method for producing the same, and nonwoven fabric using the same | |
| JP2971919B2 (en) | Thermal adhesive fiber | |
| JP2001040564A (en) | Flexible nonwoven fabric and its nonwoven fabric laminate | |
| JP2856474B2 (en) | High elongation non-woven fabric | |
| JP2775476B2 (en) | Composite type heat-bondable fiber and nonwoven fabric using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |