JP2003306863A - Polyester filament nonwoven fabric and separation membrane using the same - Google Patents
Polyester filament nonwoven fabric and separation membrane using the sameInfo
- Publication number
- JP2003306863A JP2003306863A JP2002115247A JP2002115247A JP2003306863A JP 2003306863 A JP2003306863 A JP 2003306863A JP 2002115247 A JP2002115247 A JP 2002115247A JP 2002115247 A JP2002115247 A JP 2002115247A JP 2003306863 A JP2003306863 A JP 2003306863A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- fiber
- polyester
- long
- melting point
- 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
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Biological Depolymerization Polymers (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、熱接着性がある芯
鞘型複合繊維よりなる長繊維不織布に関するものであ
り、さらに詳しくは、異物量が少なく接着性の高い長繊
維不織布およびそれを支持体とした分離膜に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long-fiber non-woven fabric comprising a core-sheath type composite fiber having a heat-adhesive property, and more specifically, a long-fiber non-woven fabric having a small amount of foreign matter and a high adhesive property and a support thereof. The present invention relates to a separation membrane as a body.
【０００２】[0002]
【従来の技術】ポリエチレンテレフタレート、ポリプロ
ピレンテレフタレート、ポリブチレンテレフタレート等
に代表されるポリエステル系長繊維不織布は、機械的特
性及び化学的特性に優れており、それぞれのポリエステ
ルの特性に応じて、例えば土木・建築資材用や産業資材
用に使用されている。特に、代表的なポリエステルであ
るポリエチレンテレフタレートは、耐熱性、優れた強伸
度特性、比較的安価な原料価格などの優位性から工業的
に広く利用されている。また、ポリエチレンテレフタレ
ートと低密度ポリエチレンの２成分よりなる複合繊維を
用いた長繊維不織布が特公平８−１４０６９号公報に開
示されるごとく熱接着性不織布として用いられている。
しかしながら、低密度ポリエチレンは熱安定性に劣るた
め酸化防止剤など加工安定剤や製品安定剤などを含有し
ており、オリゴマーなど低分子量物や酸化防止剤などの
安定剤が、フィルターやその支持体などの用途に用いた
場合に濾過ガスや濾過液体に混入する可能性があるとい
う問題点を有している。このような経緯から不純物が少
なく、熱融着性やヒートシールが良い不織布が望まれて
いる。2. Description of the Related Art Polyester long-fiber nonwoven fabrics represented by polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate and the like are excellent in mechanical properties and chemical properties. It is used for building materials and industrial materials. In particular, polyethylene terephthalate, which is a typical polyester, is widely used industrially because of its advantages such as heat resistance, excellent strength and elongation characteristics, and relatively low raw material cost. Further, a long fiber non-woven fabric using a composite fiber composed of two components of polyethylene terephthalate and low density polyethylene is used as a heat-adhesive non-woven fabric as disclosed in Japanese Patent Publication No. 8-14069.
However, since low-density polyethylene has poor thermal stability, it contains processing stabilizers such as antioxidants, product stabilizers, etc., and low molecular weight substances such as oligomers and stabilizers such as antioxidants are used in filters and their supports. When used for such purposes, there is a problem that it may be mixed in the filtered gas or the filtered liquid. From such a background, there is a demand for a non-woven fabric which has few impurities and is excellent in heat-sealing property and heat-sealing.
【０００３】また、熱接着性不織布は、極細繊維不織布
や多孔膜よりなるフィルター素材又は、透湿防水膜など
の分離機能を有する膜材などと貼り合わせて分離膜の支
持体として用いられることも多い。膜材は、ポリプロピ
レンやポリテトラフルオロエチレンなどで構成される場
合も多いが、これらの構成樹脂は非常に薄く剛性が低い
ために単独で用いることが困難であるため、不織布など
を補強材として積層されて用いられることが多い。しか
しながら、ポリプロピレンやポリテトラフルオロエチレ
ンは、通常の樹脂との接着性が悪く、形態安定性を改善
するための支持体などと貼り合わせる場合には問題とな
ることも少なくなかった。ポリエチレンテレフタレート
と低密度ポリエチレンの２成分よりなる複合繊維を用い
た長繊維不織布も前述の通り溶出物の発生の問題があ
り、特に、半導体関連用途などに用いられるフィルター
としてはあまり好ましくなかった。The heat-adhesive non-woven fabric may also be used as a support for a separation membrane by laminating it with a filter material composed of an ultra-fine fiber non-woven fabric or a porous membrane, or a membrane material having a separating function such as a moisture-permeable waterproof membrane. Many. Membrane materials are often made of polypropylene or polytetrafluoroethylene, but these constituent resins are very thin and low in rigidity, making it difficult to use them alone. It is often used after being used. However, polypropylene and polytetrafluoroethylene have poor adhesion to ordinary resins, and often cause problems when they are bonded to a support or the like for improving morphological stability. A long-fiber nonwoven fabric using a composite fiber composed of two components of polyethylene terephthalate and low-density polyethylene also has a problem of generation of eluate as described above, and is not particularly preferable as a filter used for semiconductor-related applications.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、かかる問題
点を鑑みてなされたものであり、極細繊維不織布や多孔
膜よりなるフィルター素材や透湿防水膜などの分離機能
を有する膜材などと貼り合わせて分離膜の支持体として
用いることができ、その接着性が高く、かつ異物の含有
量が少ない熱接着性長繊維不織布であり、また、それを
支持体とした分離膜を提供しようとするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and includes a membrane material having a separating function such as a filter material made of an ultrafine fiber nonwoven fabric or a porous membrane or a moisture permeable waterproof membrane. A thermoadhesive long-fiber non-woven fabric that can be used as a support for a separation membrane by pasting, has high adhesiveness, and has a low content of foreign matter. To do.
【０００５】[0005]
【課題を解決するための手段】かかる問題点を解決する
ために本発明は以下の手段をとる。本発明は、鞘成分が
融点１１０〜２２０℃の低融点ポリエステルであり、芯
成分が融点１８０〜３００℃のポリエステルである繊維
径が７〜５０μｍの芯鞘型複合繊維よりなり、目付が１
５〜２７０ｇ／ｍ2、伸び率が３０％以上であることを
特徴とする長繊維不織布である。In order to solve such a problem, the present invention takes the following means. The present invention comprises a core-sheath type composite fiber having a fiber diameter of 7 to 50 μm, in which the sheath component is a low melting point polyester having a melting point of 110 to 220 ° C., and the core component is a polyester having a melting point of 180 to 300 ° C.
It is a long-fiber nonwoven fabric characterized by having an elongation of 5 to 270 g / m 2 and an elongation of 30% or more.
【０００６】また、鞘成分が脂肪族ポリエステル又はブ
ロック共重合ポリエステルであることを特徴とする第１
に記載の長繊維不織布である。The first aspect is characterized in that the sheath component is an aliphatic polyester or a block copolymerized polyester.
The long-fiber non-woven fabric described in 1.
【０００７】そして、芯成分が、ポリエチレンテレフタ
レート、ポリプロピレンテレフタレート、ポリブチレン
テレフタレート、ポリ乳酸又はそれらのいずれかを一部
に含む共重合体であることを特徴とする第１又は第２に
記載の長繊維不織布である。The core component is polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polylactic acid, or a copolymer containing any one of them in the first or second length. It is a fiber non-woven fabric.
【０００８】さらには、第１〜３のいずれかに記載の長
繊維不織布と多孔膜とが長繊維不織布の鞘成分の熱溶融
によって接着されていることを特徴とする分離膜であ
る。Further, the separation membrane is characterized in that the long fiber nonwoven fabric according to any one of the first to third aspects and the porous membrane are adhered by heat fusion of the sheath component of the long fiber nonwoven fabric.
【０００９】また、第１〜３のいずれかに記載の長繊維
不織布が、該長繊維不織布の表面積の１５％以上が鞘成
分の熱溶融によって接着された分離膜である。The long fiber nonwoven fabric according to any one of the first to third aspects is a separation membrane in which 15% or more of the surface area of the long fiber nonwoven fabric is adhered by heat melting of the sheath component.
【００１０】[0010]
【発明の実施の形態】以下に本発明について詳細に説明
する。本発明で用いられる複合長繊維不織布は、鞘成分
が融点１１０〜２２０℃の低融点ポリエステルであり、
芯成分が融点１８０〜３００℃のポリエステルである芯
鞘型複合繊維であることが必要である。この構成によ
り、本発明の目的である異物量が少なく、接着性の高い
長繊維不織布およびそれを支持体とした分離膜を提供す
ることが可能となる。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. The composite long-fiber nonwoven fabric used in the present invention is a low melting point polyester having a sheath component of melting point 110 to 220 ° C.,
It is necessary that the core component is a core-sheath type composite fiber which is a polyester having a melting point of 180 to 300 ° C. With this configuration, it is possible to provide a long-fiber nonwoven fabric having a small amount of foreign matter and high adhesiveness, which is the object of the present invention, and a separation membrane using the nonwoven fabric as a support.
【００１１】不織布の形態は、長繊維不織布であればプ
ロセス油剤を付与する必要がないため異物を無くするこ
とが可能である。また、長繊維不織布はリントフリー性
にもすぐれるため繊維の脱落が無いのでフィルターなど
の用途に特に好適である。As for the form of the non-woven fabric, if it is a long-fiber non-woven fabric, it is not necessary to add a process oil agent, and therefore foreign matters can be eliminated. Further, the long-fiber non-woven fabric is excellent in lint-free property so that the fibers do not fall off, so that it is particularly suitable for applications such as filters.
【００１２】鞘成分に用いるポリマーは、融点が１１０
〜２２０℃の低融点ポリエステルであることが必要であ
る。融点が１１０℃未満であると、室温に於いても接着
力が低下したり、粘着性が出てブロッキングなどの問題
が出るおそれがある。一方、融点が２２０℃より高くな
ると、接着加工温度が高くなり過ぎて、接着対象物の表
面温度が低いとすぐに固化が始まり接着性が低下した
り、操業性が悪くなる可能性がある。The polymer used for the sheath component has a melting point of 110.
It is necessary to be a low melting point polyester of 220 ° C. If the melting point is less than 110 ° C., the adhesive strength may be lowered even at room temperature, and the tackiness may be generated, resulting in problems such as blocking. On the other hand, when the melting point is higher than 220 ° C., the bonding processing temperature becomes too high, and when the surface temperature of the object to be bonded is low, solidification starts immediately and the adhesiveness may be lowered, or the operability may be deteriorated.
【００１３】ポリエステル系樹脂は、一般に異物の発生
が少ないためフィルター関連用途への市場に特に好適で
ある。好適な樹脂としては、脂肪族ポリエステル又はブ
ロック共重合ポリエステルおよびそれらを基本骨格の一
部とする共重合ポリマーなどが挙げられる。Polyester resins are generally suitable for filter-related applications because they generally produce less foreign matter. Suitable resins include aliphatic polyesters or block copolymerized polyesters and copolymers having them as a part of the basic skeleton.
【００１４】また、芯成分のポリマーは、ポリエチレン
テレフタレート、ポリプロピレンテレフタレート、ポリ
ブチレンテレフタレート、ポリ乳酸又はそれらのいずれ
かを一部に含む共重合体であることが必要である。これ
らのポリエステル系樹脂は、融点が１８０〜３００℃で
あれば、高温時の寸法安定性や機械的強度特性に優れる
ため特に好ましい。The core component polymer must be polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polylactic acid, or a copolymer containing any one of them. These polyester-based resins having a melting point of 180 to 300 ° C. are particularly preferable because they have excellent dimensional stability and mechanical strength characteristics at high temperatures.
【００１５】最近、自然成分由来やバイオテクノロジー
で原料を得ることが可能となってきており、環境保全の
観点からも特に好ましい。特に、分離膜支持体として形
態安定性改善のために用いるときには、ポリエステル繊
維のもつ高い剛性が有効になる。芯成分のポリマーは、
鞘成分のポリマーの融点又は軟化点より少なくとも２０
℃以上高い温度であることが、接着加工の操業性を考え
ると好ましい。融点の差が小さいと、加工温度のコント
ロールを厳密にする必要があるため高度な温度制御設備
が必要になったり、加工速度が低速にせざるをえなくな
ることがある。Recently, it has become possible to obtain raw materials from natural ingredients and biotechnology, which is particularly preferable from the viewpoint of environmental protection. In particular, when used as a separation membrane support for improving the morphological stability, the high rigidity of the polyester fiber is effective. The core component polymer is
At least 20 from the melting point or softening point of the polymer of the sheath component
It is preferable that the temperature is higher than 0 ° C in consideration of the workability of the bonding process. If the difference in the melting points is small, it is necessary to strictly control the processing temperature, so that high temperature control equipment may be required or the processing speed may have to be reduced.
【００１６】複合繊維の芯成分と鞘成分の重量比は２
０：８０〜７０：３０程度であることが好ましく、さら
に好ましくは３０：７０〜６０：４０であり、特に好ま
しくは４０：６０〜５５：４５である。接着成分である
鞘成分が３０％より少ないと十分な接着力を得ることが
難しくなる。一方、７０％を超えると、接着加工時の温
度コントロールが難しくなったり、機械的強度特性が低
くなりやすいなど問題を生じやすくなる。The weight ratio of the core component and the sheath component of the composite fiber is 2
It is preferably about 0:80 to 70:30, more preferably 30:70 to 60:40, and particularly preferably 40:60 to 55:45. If the sheath component, which is the adhesive component, is less than 30%, it becomes difficult to obtain a sufficient adhesive force. On the other hand, if it exceeds 70%, problems such as difficulty in temperature control during bonding processing and deterioration of mechanical strength characteristics are likely to occur.
【００１７】また、本発明における長繊維不織布の繊維
径は、７〜５０μｍであることが必要である。繊維径が
７μｍより小さいと接着部面積が小さくなり、接着力が
低下しやすくなる傾向がある。一方、繊維径が５０μｍ
より大きくなると、紡糸時に繊維が融着しやすいため
に、繊維が束状になって不織布の地合斑が大きくなり好
ましくない。また、スパンボンド法紡糸過程で糸切れを
生じたり、繊維牽引のエジェクターに繊維が付着したり
詰まったりするなどの問題点を生じやすく操業性に問題
を生じることがある。Further, the fiber diameter of the long fiber non-woven fabric in the present invention needs to be 7 to 50 μm. If the fiber diameter is smaller than 7 μm, the area of the bonded portion becomes small, and the adhesive strength tends to decrease. On the other hand, the fiber diameter is 50 μm
If the size is larger, the fibers are likely to be fused during spinning, and the fibers are bundled to form a large unevenness in the texture of the nonwoven fabric, which is not preferable. Further, problems such as yarn breakage in the spunbond spinning process, fibers adhering to or clogging of the ejector for fiber traction are likely to occur, and problems may occur in operability.
【００１８】さらに、長繊維不織布の目付が１５〜２７
０ｇ／ｍ2であることが好ましい。また、目付が２７０
ｇ／ｍ2より大きいと熱エンボス加工を行うときに、エ
ンボスロールでの伝熱性の問題から接着強度が低くなる
問題が生じやすくなる傾向がある。本発明の不織布を、
分離膜支持体として利用した場合には、目付が１５〜７
０ｇ／ｍ2であることが好ましい。目付が１５ｇ／ｍ2よ
り小さいと先述の理由から適切な接着力を得ることが困
難となったり、形態保持性が低下する傾向がある。一
方、目付が７０ｇ／ｍ2より大きくても接着力が高くな
ることはあまり期待できず、分離膜の支持体として用い
る際に、厚みや重量が大きくなって取り扱い性が低下し
たり、圧力損失が大きくなるという問題を生じやすくな
る。また、厚みが厚いとプリーツ型フィルターに用いる
場合に織り込み襞折り数が少なくなり結果として有効濾
過面積が少なくなる傾向がある。Furthermore, the unit weight of the long fiber non-woven fabric is 15 to 27.
It is preferably 0 g / m 2 . Also, the basis weight is 270
When it is larger than g / m 2, a problem that the adhesive strength becomes low tends to occur during heat embossing due to the problem of heat conductivity in the embossing roll. The nonwoven fabric of the present invention,
When used as a separation membrane support, the basis weight is 15 to 7
It is preferably 0 g / m 2 . If the basis weight is less than 15 g / m 2, it becomes difficult to obtain an appropriate adhesive force or the shape retention tends to be deteriorated for the reasons described above. On the other hand, even if the basis weight is more than 70 g / m 2 , it cannot be expected that the adhesive strength will be high, and when it is used as a support for a separation membrane, the thickness and weight will be large, resulting in poor handleability and pressure loss. Is likely to occur. Further, if the thickness is large, the number of folds woven into the pleated filter is reduced when used in a pleated filter, and as a result, the effective filtration area tends to be reduced.
【００１９】本発明の不織布は、縦横の少なくともどち
らか一方の伸び率が３０％以上であることを必要であ
り、好ましくは４０％以上、特に好ましくは５０％以上
である。通常のポリエステル長繊維不織布を熱エンボス
処理した場合には伸び率が２０〜２５％程度である場合
が多かった。しかしながら、本発明の芯鞘型複合繊維よ
りなる不織布は、伸び率が３０％以上となり、紡糸条件
を適切に調整することで、伸び率を５０％以上にするこ
とも可能であることが判明した。通常の不織布は、引張
強さが高くなると伸び率が小さくなる傾向があるので、
本発明の不織布は、強伸度特性が非常に優れた不織布で
ある。The nonwoven fabric of the present invention needs to have an elongation percentage of at least one of the length and width of 30% or more, preferably 40% or more, and particularly preferably 50% or more. When a normal polyester long-fiber nonwoven fabric is heat-embossed, the elongation rate is often about 20 to 25%. However, the nonwoven fabric comprising the core-sheath type composite fiber of the present invention has an elongation rate of 30% or more, and it has been found that the elongation rate can be 50% or more by appropriately adjusting the spinning conditions. . Ordinary non-woven fabrics tend to have lower elongation as tensile strength increases, so
The nonwoven fabric of the present invention is a nonwoven fabric having very excellent strength and elongation characteristics.
【００２０】本発明の長繊維不織布を多孔膜と重ねて、
主に熱により不織布の鞘成分のみを溶融させて接着して
分離膜として用いることも好ましい形態のひとつであ
る。このとき、熱により不織布表面積の１５％以上の部
分が鞘成分のみを溶融させて変形接着していることが好
ましい。接着部分の面積が１５％未満であると接着力が
弱く剥離しやすくなる傾向がある。また、圧力をかけす
ぎてフィルム化すると、フィルターとして用いた場合の
濾過対象流体による透過抵抗が上昇する傾向がある。本
発明の不織布と多孔膜の接着性を良くするためには、不
織布が熱エンボス処理不織布である場合には、非エンボ
ス面（プレーンロールと接触した面）が多孔膜に接して
いることが特に好ましい。The long-fiber nonwoven fabric of the present invention is laminated with a porous membrane,
It is also one of the preferable modes that the sheath component of the non-woven fabric is mainly melted by heat and adhered to be used as a separation membrane. At this time, it is preferable that only 15% or more of the surface area of the non-woven fabric is melted and deformed and bonded by heat. If the area of the bonded portion is less than 15%, the adhesive strength is weak and the peeling tends to occur easily. Further, if a film is formed by applying too much pressure, the permeation resistance of the fluid to be filtered tends to increase when it is used as a filter. In order to improve the adhesiveness between the nonwoven fabric of the present invention and the porous membrane, it is particularly preferable that the non-embossed surface (the surface in contact with the plain roll) is in contact with the porous membrane when the nonwoven fabric is a hot embossed nonwoven fabric. preferable.
【００２１】[0021]
【実施例】以下、本発明を実施例によって説明するが、
本発明は何らこれらに限定されるものではない。なお、
測定方法は、以下の方法を採用した。
（引張試験）幅５ｃｍ長さ２０ｃｍの矩形の不織布サン
プルを切り出し、つかみ間隔１０ｃｍ、１００％／分の
伸長速度で引っ張り試験をおこない、引張強さと伸び率
を測定した。
（熱接着試験）１０ｃｍ×３ｃｍの矩形に切り出したサ
ンプルを２枚積層して、片側より３ｃｍの所を表面がポ
リテトラフルオロエチレンでコーティングされた幅３ｍ
ｍの加熱ヒーターで約１．２ｋｇ／ｃｍ2の圧力で１秒
間圧着して後、剥離強力を測定した。接着温度は、鞘成
分ポリマーの融点より５〜４５℃高い温度で約１０℃ピ
ッチで行い、接着強度の最も高い値を採用した。EXAMPLES The present invention will be described below with reference to examples.
The present invention is not limited to these. In addition,
The following method was adopted as the measuring method. (Tensile test) A rectangular non-woven fabric sample having a width of 5 cm and a length of 20 cm was cut out, and a tensile test was performed at a gripping interval of 10 cm and an elongation rate of 100% / min to measure the tensile strength and the elongation rate. (Thermal adhesion test) Two samples cut into a rectangle of 10 cm x 3 cm were laminated, and 3 cm width from one side where the surface was coated with polytetrafluoroethylene was 3 m.
Peel strength was measured after pressure-bonding for 1 second with a heater of m at a pressure of about 1.2 kg / cm 2 . The bonding temperature was 5 ° C. to 45 ° C. higher than the melting point of the sheath component polymer at a pitch of about 10 ° C., and the highest value of the bonding strength was adopted.
【００２２】（実施例１）イソフタル酸成分を導入した
共重合ポリエステル（融点約１３０℃）を鞘成分とし、
芯成分が融点が約２７０℃のポリエチレンテレフタレー
トである繊維径が１５μｍの芯鞘型複合繊維よりなるス
パンボンド不織布を作成した。芯鞘比は重量ベースで５
０：５０であった。目付が４０ｇ／ｍ2の不織布の引っ
張り強度と熱接着試験を実施した。引張強さは、縦横そ
れぞれ１４ｋｇ／５ｃｍ、１１ｋｇ／５ｃｍであり、伸
び率は縦横それぞれ６５％、５８％であった。また、剥
離強度は３．４ｋｇであった。濾過精度が０．１μｍの
ポリテトラフルオロエチレンの多孔膜フィルターと積層
したところ良好な接着状態であった。Example 1 A copolymer polyester having an isophthalic acid component (melting point: about 130 ° C.) was used as a sheath component,
A spunbonded non-woven fabric made of core-sheath type composite fibers having a core diameter of polyethylene terephthalate having a melting point of about 270 ° C. and a fiber diameter of 15 μm was prepared. The core-sheath ratio is 5 on a weight basis
It was 0:50. A nonwoven fabric having a basis weight of 40 g / m 2 was subjected to a tensile strength and thermal adhesion test. The tensile strength was 14 kg / 5 cm and 11 kg / 5 cm, respectively, and the elongation was 65% and 58%, respectively. The peel strength was 3.4 kg. When laminated with a polytetrafluoroethylene porous membrane filter having a filtration accuracy of 0.1 μm, a good adhesion state was obtained.
【００２３】（実施例２）ハードセグメントとソフトセ
グメントよりなるブロック共重合ポリエステル（東洋紡
績株式会社製ペルプレンＰ４０Ｂ、融点約１８０℃）を
鞘成分とし、芯成分が融点が約２３０℃のポリプロピレ
ンテレフタレートである繊維径が２２μｍの芯鞘型複合
繊維よりなるスパンボンド不織布を作成した。得られた
不織布にハードセグメントとソフトセグメントよりなる
ブロック共重合ポリエステル（東洋紡績株式会社製ペル
プレン、ＧＰ５５０、融点約１７５℃）の２０μｍ厚さ
の膜を押出ラミネート法により積層した。このポリエス
テルのよりなる膜は無孔であるため耐水性が高異にもか
かわらず、水蒸気成分を透過させることが可能である。
鞘成分と類似の構造であるため接着力は極めて高く良好
であった。得られた膜複合体は、透湿度７６００ｇ／ｍ
2・２４Ｈrの高い透湿性を示し、エアコンなどの調湿膜
や、ハウスラップ材、使い捨て手袋などの部材として有
効に用いることが可能であった。Example 2 Polypropylene terephthalate having a sheath component of block-copolymerized polyester (Perprene P40B manufactured by Toyobo Co., Ltd., melting point of about 180 ° C.) having a hard segment and a soft segment and a core component of melting point of about 230 ° C. A spunbonded nonwoven fabric made of core-sheath type composite fibers having a certain fiber diameter of 22 μm was prepared. A 20 μm-thick film of a block-copolymerized polyester (Perprene, GP550 manufactured by Toyobo Co., Ltd., melting point: 175 ° C.) having hard and soft segments was laminated on the obtained nonwoven fabric by an extrusion laminating method. Since the membrane made of this polyester is non-porous, it is possible to allow water vapor components to permeate despite its high water resistance.
Since the structure was similar to that of the sheath component, the adhesive strength was extremely high and good. The obtained membrane composite has a water vapor transmission rate of 7600 g / m.
It has a high moisture permeability of 2/24 Hr, and could be effectively used as a humidity control film for air conditioners, house wrap materials, and disposable gloves.
【００２４】（比較例１）鞘成分がＭＦＲが１５ｇ／１
０分のチグラーナッタ触媒により合成されたポリプロピ
レン（融点約１７０℃）で、芯成分が融点が約２３０℃
のポリプロピレンテレフタレートである繊維径が１５μ
ｍの芯鞘型複合繊維よりなるスパンボンド不織布を作成
した。目付が４０ｇ／ｍ2の不織布の引っ張り強度と熱
接着試験を実施した。引張強さは、縦横それぞれ８ｋｇ
／５ｃｍ、７ｋｇ／５ｃｍであり、伸び率は縦横それぞ
れ２５％、２７％であった。また、剥離強度は０．７ｋ
ｇであった。ポリプロピレン樹脂と、ポリプロピレンテ
レフタレート樹脂の界面で剥離が生じており、接着性が
良くなかったと推定される。濾過精度が０．１μｍのポ
リテトラフルオロエチレンの多孔膜フィルターと積層し
たところ、手で簡単に剥がれて問題であった。(Comparative Example 1) The sheath component has an MFR of 15 g / 1.
Polypropylene (melting point about 170 ° C) synthesized with a 0 minute Ziegler-Natta catalyst, the core component having a melting point of about 230 ° C.
Polypropylene terephthalate with a fiber diameter of 15μ
A spunbonded nonwoven fabric made of m-sheath type composite fibers was prepared. A nonwoven fabric having a basis weight of 40 g / m 2 was subjected to a tensile strength and thermal adhesion test. Tensile strength is 8 kg each in length and width
/ 5 cm and 7 kg / 5 cm, and the elongation rates were 25% and 27% in the length and width, respectively. The peel strength is 0.7k
It was g. It is presumed that the adhesiveness was not good because peeling occurred at the interface between the polypropylene resin and the polypropylene terephthalate resin. When laminated with a polytetrafluoroethylene porous membrane filter having a filtration accuracy of 0.1 μm, it was easily peeled off by hand, which was a problem.
【００２５】[0025]
【発明の効果】本発明によれば、異物量が少なく接着性
の良い長繊維不織布およびそれを支持体とした形態安定
性の良い分離膜を提供することを可能とした。EFFECTS OF THE INVENTION According to the present invention, it is possible to provide a long-fiber non-woven fabric having a small amount of foreign matter and good adhesiveness, and a separation membrane using the same as a support and having good morphological stability.
Claims (5)
ポリエステルであり、芯成分が融点１８０〜３００℃の
ポリエステルである繊維径が７〜５０μｍの芯鞘型複合
繊維よりなり、目付が１５〜２７０ｇ／ｍ2、伸び率が
３０％以上であることを特徴とする長繊維不織布。1. A core-sheath type composite fiber having a fiber diameter of 7 to 50 μm in which a sheath component is a low melting point polyester having a melting point of 110 to 220 ° C. and a core component is a polyester having a melting point of 180 to 300 ° C., and a basis weight is 15 A long-fiber non-woven fabric characterized by having an elongation of 270 g / m 2 and an elongation of 30% or more.
ク共重合ポリエステルであることを特徴とする請求項１
に記載の長繊維不織布。2. The sheath component is an aliphatic polyester or a block copolymerized polyester.
The long-fiber non-woven fabric described in.
ト、ポリプロピレンテレフタレート、ポリブチレンテレ
フタレート、ポリ乳酸又はそれらのいずれかを一部に含
む共重合体であることを特徴とする請求項１又は請求項
２に記載の長繊維不織布3. The core component is polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polylactic acid, or a copolymer partially containing any one of them, wherein the core component is a copolymer. Long fiber non-woven fabric
不織布と多孔膜とが長繊維不織布の鞘成分の熱溶融によ
って接着されていることを特徴とする分離膜。4. A separation membrane, wherein the long-fiber nonwoven fabric according to any one of claims 1 to 3 and the porous membrane are bonded by heat fusion of a sheath component of the long-fiber nonwoven fabric.
不織布が、該不織布の表面積の１５％以上が鞘成分の熱
溶融によって接着された分離膜。5. A separation membrane in which the long-fiber non-woven fabric according to any one of claims 1 to 3 has 15% or more of the surface area of the non-woven fabric adhered by heat fusion of a sheath component.
Priority Applications (1)
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|---|---|---|---|
| JP2002115247A JP4016320B2 (en) | 2002-04-17 | 2002-04-17 | Polyester long fiber nonwoven fabric and separation membrane using the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002115247A JP4016320B2 (en) | 2002-04-17 | 2002-04-17 | Polyester long fiber nonwoven fabric and separation membrane using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003306863A true JP2003306863A (en) | 2003-10-31 |
| JP4016320B2 JP4016320B2 (en) | 2007-12-05 |
Family
ID=29396678
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002115247A Expired - Fee Related JP4016320B2 (en) | 2002-04-17 | 2002-04-17 | Polyester long fiber nonwoven fabric and separation membrane using the same |
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