JPH0726310B2 - Extra-fine long-fiber non-woven fabric - Google Patents
Extra-fine long-fiber non-woven fabricInfo
- Publication number
- JPH0726310B2 JPH0726310B2 JP2096894A JP9689490A JPH0726310B2 JP H0726310 B2 JPH0726310 B2 JP H0726310B2 JP 2096894 A JP2096894 A JP 2096894A JP 9689490 A JP9689490 A JP 9689490A JP H0726310 B2 JPH0726310 B2 JP H0726310B2
- Authority
- JP
- Japan
- Prior art keywords
- polymer component
- fiber
- component
- fibers
- woven fabric
- 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.)
- Expired - Fee Related
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- Multicomponent Fibers (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Nonwoven Fabrics (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は,極細長繊維からなる不織布に関し,さらに詳
しくは,繊細な表面形態を有する極細長繊維からなる不
織布に関するものである。TECHNICAL FIELD The present invention relates to a non-woven fabric made of ultrafine long fibers, and more particularly to a nonwoven fabric made of ultrafine long fibers having a delicate surface morphology.
(従来の技術) 従来から,不織布は,衣料用,産業資材用,土木建築資
材用,農芸園芸資材用,生活関連資材用あるいは医療衛
生材用等,種々の用途に使用されている。中でも,長繊
維からなる不織布は,短繊維からなる不織布に対し,強
力が高く,しかも生産性に優れるため,広く使用されて
いる。この長繊維からなる不織布において,表面が繊細
な構造を有する不織布を得る試みが数多くなされてき
た。例えば,特公昭44−24699号公報,特公昭52−30629
号公報及び特公昭62−41316号公報には,シートに化学
薬品処理を施して繊維を構成する重合体の一部を溶解さ
せること,あるいは溶解除去することにより細繊度の繊
維から構成される不織布を得ることが開示されている。
また,特公平1−47585号公報及び特公平1−47586号公
報には,シートを高圧水流により処理し繊維を割繊して
極細繊維とするとともに繊維に3次元的交絡を施した不
織布が開示されており,特公平1−47579号公報には,
不織布を水洗処理して水溶性成分を除去することにより
極細繊維からなる不織布を得ることが開示されている。
しかしながら,これらの不織布あるいは不織布の製造法
には,生産工程が複雑であり,しかも重合体を除去する
必要があるため,製造コストが高くなるという問題があ
る。さらに,特公昭53−10169号公報には,シートをバ
フ掛けして繊維を割繊することにより極細繊維からなる
不織布を得ることが開示されているが,この製造法に
は,構成繊維が部分的に損傷を受けるという問題があ
る。(Prior Art) Nonwoven fabrics have been conventionally used for various purposes such as clothing, industrial materials, civil engineering and construction materials, agricultural and horticultural materials, life-related materials, medical hygiene materials, and the like. Among them, non-woven fabrics made of long fibers are widely used because they have higher strength and higher productivity than non-woven fabrics made of short fibers. Many attempts have been made to obtain a non-woven fabric having a delicate structure on the non-woven fabric made of long fibers. For example, JP-B-44-24699 and JP-B-52-30629
In Japanese Patent Publication No. 62-41316 and Japanese Patent Publication No. 62-41316, a non-woven fabric made of fine fibers by subjecting a sheet to chemical treatment to dissolve or partially dissolve a polymer constituting the fibers. Is disclosed.
In addition, Japanese Patent Publication Nos. 1-47585 and 1-47586 disclose a non-woven fabric obtained by treating a sheet with a high-pressure water stream to split the fibers into ultrafine fibers and subjecting the fibers to three-dimensional entanglement. Japanese Patent Publication No. 1-47579 discloses that
It is disclosed that a nonwoven fabric made of ultrafine fibers is obtained by washing the nonwoven fabric with water to remove water-soluble components.
However, these non-woven fabrics or non-woven fabric production methods have a problem in that the production process is complicated and the polymer needs to be removed, resulting in high production cost. Furthermore, Japanese Patent Publication No. 53-10169 discloses that a nonwoven fabric composed of ultrafine fibers is obtained by buffing a sheet and splitting the fibers. There is a problem that it will be damaged.
(発明が解決しようとする課題) 本発明は,前記問題を解決し,繊細な表面形態を有する
極細長繊維からなる不織布を提供しようとするものであ
る。(Problems to be Solved by the Invention) The present invention intends to solve the above problems and provide a nonwoven fabric made of ultrafine long fibers having a delicate surface morphology.
(課題を解決するための手段) 本発明者は,前記問題を解決すべく鋭意検討の結果,本
発明に到達した。すなわち,本発明は,重合体成分A
と,前記重合体成分Aに対し非相溶性の重合体成分Bか
らなる2個以上の凸レンズ状横断面を有するセグメント
とから構成される2成分複合長繊維と,前記2成分複合
長繊維から重合体成分Bからなるセグメントが一部剥離
した2成分複合長繊維と,前記2成分複合長繊維の分割
により発現した前記重合体成分Aのみから構成される割
繊長繊維と,前記重合体成分Bのみから構成される単糸
繊度が0.8デニール以下の割繊長繊維とから構成される
不織布であって,前記重合体成分Aの融点と重合体成分
Bの融点差が30℃以上であり,2成分複合長繊維の繊維軸
に垂直な横断面における重合体成分Aの外接円の半径
R0,重合体成分Bの外接円の半径R1,重合体成分Bからな
る凸レンズ状部分において重合体成分Aと接している円
弧の曲率半径R2,円弧の弧長L及び凸レンズ状部分の厚
さHが下記,及び式を満足し,重合体成分Bから
なるセグメントの割繊割合が30%以上95%以下であり,
かつ繊維間が重合体成分A又は重合体成分Bの内いずれ
か低融点側の重合体成分からなる繊維により少なくとも
部分的に接着されていることを特徴とする極細長繊維不
織布,を要旨とするものである。(Means for Solving the Problem) The inventor of the present invention has reached the present invention as a result of extensive studies to solve the above problems. That is, the present invention relates to the polymer component A
And a bicomponent composite filament comprising a polymer component B which is incompatible with the polymer component A and having two or more convex lens-shaped cross sections, and A two-component composite continuous fiber in which a segment composed of a united component B is partly peeled off, a split fiber composed of only the polymer component A developed by the division of the two-component composite continuous fiber, and the polymer component B. A non-woven fabric composed of split filaments having a single yarn fineness of 0.8 denier or less, wherein the melting point difference between the polymer component A and the polymer component B is 30 ° C. or more, 2 Radius of the circumscribed circle of the polymer component A in the cross section perpendicular to the fiber axis of the component composite long fiber
R 0 , radius R 1 of the circumscribed circle of the polymer component B, radius of curvature R 2 of an arc in contact with the polymer component A in the convex lens-shaped portion composed of the polymer component B, arc length L of the arc and convex lens-shaped portion The thickness H satisfies the following and the formula, and the splitting ratio of the segment composed of the polymer component B is 30% or more and 95% or less,
An ultrafine long-fiber non-woven fabric, characterized in that the fibers are at least partially adhered to each other by fibers made of a polymer component having a lower melting point of either the polymer component A or the polymer component B. It is a thing.
R1/R0>1 …… R2/R0≧1 …… L/H≧1 …… 次に,本発明を詳細に説明する。R 1 / R 0 > 1 ...... R 2 / R 0 ≧ 1 ...... L / H ≧ 1 ...... Next, the present invention will be described in detail.
本発明における非相溶性の重合体成分A及びBとは,い
ずれも繊維形成能を有し,通常の溶融紡糸装置を使用し
て溶融紡出することができるものである。重合体成分A
及びBの組合せとしては,例えば,ポリエステル系とポ
リアミド系,ポリエステル系とポリオレフイン系,ポリ
アミド系とポリオレフイン系等が挙げられ,ポリエステ
ル系重合体としては,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等のポリエステルが,ポリア
ミド系としては,ナイロン6,ナイロン46,ナイロン66,ナ
イロン610等のポリアミドが,ポリオレフイン系として
は,ポリプロピレン,高密度ポリエチレン,線状低密度
ポリエチレン,エチレン/プロピレン共重合体等のポリ
オレフインが挙げられる。また,重合体成分A及びBに
は,各々,通常の艶消剤,熱安定剤,顔料あるいは重合
体の結晶化促進剤等の添加剤を添加してもよい。The incompatible polymer components A and B in the present invention each have a fiber-forming ability and can be melt-spun by using an ordinary melt-spinning apparatus. Polymer component A
Examples of the combination of B and B include polyester-based and polyamide-based, polyester-based and polyolefin-based, polyamide-based and polyolefin-based, and the like, and polyester-based polymers include polyesters such as polyethylene terephthalate and polybutylene terephthalate. Examples of the system include polyamides such as nylon 6, nylon 46, nylon 66, and nylon 610, and examples of the polyolefin system include polypropylene, high-density polyethylene, linear low-density polyethylene, ethylene / propylene copolymer, and other polyolefins. Further, to the polymer components A and B, an additive such as a usual matting agent, heat stabilizer, pigment or polymer crystallization accelerator may be added.
本発明の極細長繊維不織布は,溶融紡出された2成分複
合長繊維をエアーサツカにより引取り,ウエブコンベア
等の捕集面上に堆積させ,エンボスロールによりウエブ
に重合体成分A又は重合体成分Bの内いずれか低融点側
の重合体成分の融点未満の温度で熱処理を施して前記低
融点側の重合体成分からなる繊維により繊維間を少なく
とも部分的に接着し,次いで得られた不織ウエブを屈曲
させることによって,あるいは高線圧力の加熱又は非加
熱の表面平滑なロール群で処理することによって重合体
成分Bからなる繊維を複合長繊維から剥離させることに
より作成することができる。また,ウエブを高線圧力の
加熱された表面平滑なロール群で処理することによって
重合体成分Bからなる繊維を複合長繊維から剥離させる
と同時に,前記低融点側の重合体成分からなる繊維によ
り繊維間を少なくとも部分的に接着することにより作成
することができる。さらに,ウエブを高線圧力の非加熱
の表面平滑なロール群で処理し,一旦,重合体成分Bか
らなる繊維を複合長繊維から剥離させて割繊長繊維と
し,次いで,加熱ロールで前記低融点側の重合体成分か
らなる繊維により繊維間を少なくとも部分的に接着する
ことによっても作成することができる。なお,得られた
不織布に,不織布の柔軟性を向上させるための柔軟加工
を施してもよい。The ultrafine long-fiber non-woven fabric of the present invention is obtained by collecting melt-spun two-component composite long fibers by an air sucker, depositing them on a collecting surface such as a web conveyor, and by using an embossing roll, the polymer component A or the polymer component. Non-woven fabric obtained by heat-treating at a temperature lower than the melting point of the polymer component on the low melting point side of B to bond the fibers at least partially with the fiber composed of the polymer component on the low melting point side. It can be prepared by peeling the fiber composed of the polymer component B from the composite long fiber by bending the web or by treating with a group of rolls having a high linear pressure which is heated or not heated and has a smooth surface. Further, the fibers made of the polymer component B are separated from the composite long fibers by treating the web with a group of rolls having a high linear pressure and having a smooth surface, and at the same time, by the fibers made of the polymer component on the low melting point side. It can be made by at least partially bonding the fibers. Further, the web is treated with a group of rolls having a high linear pressure and not heated and having a smooth surface, and the fibers composed of the polymer component B are once separated from the composite long fibers to obtain split filaments, and then the above-mentioned low roll is applied with a heating roll. It can also be prepared by at least partially adhering the fibers with a fiber composed of a polymer component on the melting point side. The obtained non-woven fabric may be subjected to softening for improving the softness of the non-woven fabric.
本発明における重合体成分Aと重合体成分Bとの融点差
は,30℃以上であることが必要である。本発明でいう重
合体の融点とは,パーキンエルマ社製示差熱量計DSC−
2型を使用し,同装置のマニユアルに従い,試料量を約
5mg,走査速度を20℃/分として測定して得られるDSC曲
線から求めたものである。重合体成分Aと重合体成分B
との融点差が30℃未満であると,ウエブを加熱ロールで
熱接着するときに不織布が熱収縮して寸法安定性が低下
して不織布の風合いが悪くなったり,熱接着時の接着温
度域が狭くなり温度制御が困難となる等の問題を生じる
ため好ましくない。ウエブを低融点側の重合体成分の融
点以上の表面温度の加熱ロールで熱接着すると,得られ
る不織布はフイルム状あるいは表面の固いものとなるた
め好ましくない。The melting point difference between the polymer component A and the polymer component B in the present invention needs to be 30 ° C. or higher. The melting point of the polymer in the present invention means the differential calorimeter DSC-
Type 2 is used, and the sample volume is reduced according to the manual of the device.
It was obtained from a DSC curve obtained by measuring at 5 mg and a scanning speed of 20 ° C / min. Polymer component A and polymer component B
If the melting point difference with the temperature is less than 30 ℃, when the web is heat-bonded with a heating roll, the non-woven fabric heat-shrinks and the dimensional stability deteriorates, and the texture of the non-woven fabric deteriorates. Is narrowed, which causes problems such as difficulty in temperature control, which is not preferable. When the web is heat-bonded with a heating roll having a surface temperature higher than the melting point of the polymer component on the low melting point side, the obtained nonwoven fabric becomes a film or has a hard surface, which is not preferable.
ウエブ化は,溶融紡出された繊維束を冷却した後エアー
サツカより引取る,いわゆる高速紡糸法により得られる
高配向未延伸長繊維を使用し,紡糸からウエブ化までを
連続工程として行う。ウエブは,長繊維をエアーサツカ
により引取り,帯電装置により強制的に帯電させて繊維
を開繊し,移動するウエブコンベア等の捕集面上に堆積
させることにより作成することができる。For web formation, highly oriented unstretched long fibers obtained by a so-called high-speed spinning method, in which melt-spun fiber bundles are cooled and then drawn from an air blower, are used as a continuous process from spinning to web formation. The web can be prepared by taking long fibers with an air sucker, forcibly charging them with a charging device to open the fibers, and depositing them on a collecting surface such as a moving web conveyor.
次に,本発明における2成分複合長繊維に関して説明す
る。Next, the two-component composite continuous fiber in the present invention will be described.
第1及び2図は,本発明における2成分複合長繊維の構
造を説明するための横断面図,第3及び4図は,本発明
の構成要件を満足する2成分複合長繊維の例を示す横断
面図である。第1及び2図において,R0は2成分複合長
繊維の繊維軸に垂直な横断面における重合体成分Aの外
接円の半径,R1は重合体成分Bの外接円の半径,R2は重合
体成分Bからなる凸レンズ状部分において重合体成分A
と接している円弧の曲率半径,Lは前記円弧の弧長,Hは凸
レンズ状部分の厚さである。R0,R1,R2,L及びHは繊維断
面を1000倍に拡大して撮影した断面写真を基にして実測
により求めたものである。1 and 2 are cross-sectional views for explaining the structure of the bicomponent composite continuous fiber in the present invention, and FIGS. 3 and 4 show examples of the bicomponent composite continuous fiber satisfying the constituent requirements of the present invention. FIG. In Figures 1 and 2, R 0 is the radius of the circumscribed circle of the polymer component A in the cross section perpendicular to the fiber axis of the bicomponent composite filament, R 1 is the radius of the circumscribed circle of the polymer component B, and R 2 is In the convex lens-shaped portion composed of the polymer component B, the polymer component A
Is the radius of curvature of an arc in contact with, L is the arc length of the arc, and H is the thickness of the convex lens-like portion. R 0 , R 1 , R 2 , L and H are obtained by actual measurement based on a cross-sectional photograph taken by enlarging the fiber cross section 1000 times.
本発明の極細長繊維不織布は,第1及び2図に示した
R0,R1,R2,L及びHが前記,及び式を満足すること
が必要である。R1/R0がR1/R0≦1であると,あるいはR2
/R0がR2/R0<1であると,重合体成分Aと重合体成分B
を剥離させるに際し,極めて高線圧力の表面平滑なロー
ル群で処理しなければ重合体成分Aと重合体成分Bとを
剥離し割繊することが困難となるので好ましくない。R1
/R0がR1/R0>1,かつR2/R0がR2/R0≧1であっても,L/Hが
L/H<1であると,重合体成分Aと重合体成分Bの選択
によっては,2成分複合長繊維糸条をエアーサツカにより
引取る工程で重合体成分Aと重合体成分Bとが剥離して
しまい,ウエブ化するときに繊維の開繊性が低下して均
一なウエブを得ることができず,好ましくない。The ultra-fine long-fiber nonwoven fabric of the present invention is shown in FIGS.
It is necessary that R 0 , R 1 , R 2 , L and H satisfy the above and the formula. If R 1 / R 0 is R 1 / R 0 ≦ 1, or R 2
When / R 0 is R 2 / R 0 <1, the polymer component A and the polymer component B are
When peeling, the polymer component A and the polymer component B are difficult to peel and split unless it is treated with a roll group having an extremely high linear pressure and a smooth surface, which is not preferable. R 1
Even if / R 0 is R 1 / R 0 > 1, and R 2 / R 0 is R 2 / R 0 ≧ 1, L / H is
When L / H <1, depending on the selection of the polymer component A and the polymer component B, the polymer component A and the polymer component B are separated from each other in the process of drawing the two-component composite long fiber yarn by air sucker. When the material is made into a web, the spreadability of the fibers is deteriorated and a uniform web cannot be obtained, which is not preferable.
本発明の極細長繊維不織布は,重合体成分Bからなるセ
グメントの割繊割合が30%以上95%以下のものである。
この割繊割合とは,R0,R1,R2,L及びHが前記,及び
式を満足する2成分複合長繊維と,前記2成分複合長
繊維から重合体成分Bからなるセグメントが一部剥離し
た2成分複合長繊維と,前記2成分複合長繊維の分割に
より発現した前記重合体成分Aのみから構成される割繊
長繊維と,前記重合体成分Bのみから構成される単糸繊
度が0.8デニール以下の割繊長繊維とから構成される不
織布の任意の10個所を選び,不織布の断面を100倍に拡
大して断面写真を撮影し,次いで,10枚の断面写真中,
複合長繊維から剥離している重合体成分Bのセグメント
総数と存在する重合体成分Bのセグメント総数とを求
め,算出されるもので,存在する重合体成分Bのセグメ
ント総数に対する剥離している重合体成分Bのセグメン
ト総数の比(%)を表すものである。The ultrafine long-fiber nonwoven fabric of the present invention is one in which the segment made of the polymer component B has a split fiber ratio of 30% or more and 95% or less.
This splitting ratio is defined as a two-component composite continuous fiber in which R 0 , R 1 , R 2 , L and H satisfy the above and the formula, and a segment composed of the two-component composite continuous fiber and a polymer component B. Part-peeled bicomponent composite filaments, split filaments composed only of the polymer component A developed by division of the bicomponent composite filaments, and single yarn fineness composed only of the polymer component B. Of the non-woven fabric composed of split continuous filaments of 0.8 denier or less, the cross section of the non-woven fabric is magnified 100 times and a cross-sectional photograph is taken.
It is calculated by calculating the total number of segments of the polymer component B peeled from the composite long fiber and the total number of segments of the polymer component B that are present, and the weight of the peeled weight relative to the total number of segments of the polymer component B that is present. It represents the ratio (%) of the total number of segments of the combined component B.
本発明の極細長繊維不織布は,前記割繊割合が30%以上
95%以下のものであり,この割繊割合が30%未満である
と,繊細な表面形態を有する不織布を得ることができな
い。The extra-fine long-fiber nonwoven fabric of the present invention has the split fiber ratio of 30% or more.
If the splitting ratio is less than 30%, it is not possible to obtain a non-woven fabric having a delicate surface morphology.
また,前記複合長繊維の分割により発現した前記重合体
成分Bのみから構成される割繊長繊維は,単糸繊度が0.
8デニール以下のものである。割繊割合が30%以上であ
っても,重合体成分Bからなる前記割繊長繊維の単糸繊
度が0.8デニールを超えると,繊細な表面形態を有する
不織布を得ることが困難となり,この単糸繊度が小さい
ほど,繊細な表面形態を有する不織布を得ることができ
る。Further, the split filaments composed only of the polymer component B developed by the division of the composite filaments have a single yarn fineness of 0.
It is less than 8 denier. Even if the splitting ratio is 30% or more, it becomes difficult to obtain a non-woven fabric having a delicate surface morphology if the single yarn fineness of the split continuous fibers made of the polymer component B exceeds 0.8 denier. As the yarn fineness is smaller, a nonwoven fabric having a finer surface morphology can be obtained.
本発明の2成分複合長繊維において,重合体成分Bから
なる凸レンズ状横断面を有するセグメントの数は,2個以
上であることが必要である。このセグメントの数が1個
であると,紡糸条件によっては複合長繊維に捲縮が生
じ,ウエブ化するときに繊維の開繊性が低下して均一な
ウエブを得ることができない。In the two-component composite continuous fiber of the present invention, the number of segments of the polymer component B having a convex lens-like cross section needs to be two or more. When the number of this segment is one, the composite long fibers are crimped depending on the spinning conditions, and when the fibers are made into webs, the fiber openability is deteriorated and uniform webs cannot be obtained.
本発明においては,組合せる重合体の種類,重合体の複
合比,紡糸条件,剥離割繊条件,接着条件あるいは柔軟
加工等の後加工条件を種々選択することにより,使用目
的に応じた極細長繊維不織布を得ることができる。In the present invention, by selecting various kinds of polymers to be combined, polymer composite ratios, spinning conditions, splitting and splitting conditions, adhesion conditions, and post-processing conditions such as softening, it is possible to obtain ultrafine long fibers according to the purpose of use. A fibrous nonwoven fabric can be obtained.
(実施例) 次に,実施例に基づいて本発明を具体的に説明する。な
お,実施例における各種特性は次の方法により測定し
た。(Example) Next, the present invention will be specifically described based on Examples. Various properties in the examples were measured by the following methods.
固有粘度:フエノールと四塩化エタンの等重量混合溶液
を溶媒とし,温度20℃で測定した。Intrinsic viscosity: Equal weight mixture of phenol and ethane tetrachloride was used as solvent, and measured at 20 ℃.
メルトインデツクス:ASTM D1238E法により測定した。Melt Index: Measured by the ASTM D1238E method.
融点:パーキンエルマ社製示差走査熱量計DSC−2型を
使用し,試料量を約5mg,走査速度20℃/分で測定して得
られたDSC曲線から求めた。Melting point: It was determined from a DSC curve obtained by using a differential scanning calorimeter DSC-2 type manufactured by Perkin Elma Co., Ltd. and measuring the sample amount at about 5 mg at a scanning rate of 20 ° C./min.
不織布のタテ及びヨコ方向の引張強力:幅が3cm,長さが
10cmの測定試料片を準備し,JIS L−1096に記載のスト
リツプ法により測定した。Non-woven fabric vertical and horizontal tensile strength: width 3 cm, length
A 10 cm measurement sample piece was prepared and measured by the strip method described in JIS L-1096.
トータルハンド:トータルハンドとは,布帛の柔軟性を
示す指標であり,JIS L−1096に記載のハンドルオメー
タ法により,スロツト幅を10mmとして測定した。Total hand: The total hand is an index showing the flexibility of the cloth, and was measured by the handle odometer method described in JIS L-1096 with a slot width of 10 mm.
実施例1 融点が128℃,メルトインデツクス値が25g/10分のポリ
エチレン重合体を重合体成分A,融点が258℃,固有粘度
が0.70のポリエチレンテレフタレート重合体を重合体成
分Bとし,複合紡糸孔を200孔有する紡糸口金を通して
2成分複合長繊維を溶融紡出した。溶融紡糸に際し,重
合体成分Aの溶融温度を230℃,単孔吐出量を0.60g/
分,重合体成分Bの溶融温度を285℃,単孔吐出量を0.6
0g/分〔成分Aと成分Bの比(重量比)は1対1〕とし
た。紡出された長繊維糸条を冷却した後,紡糸口金下12
0cmの位置に配設された8個のエアーサツカにフイラメ
ント25本ずつ通して吸引し,3500m/分の速度で引取り,
帯電装置により強制的に帯電させて繊維を開繊し,移動
するウエブコンベア面上に堆積させ,ウエブを得た。Example 1 A composite polymer having a melting point of 128 ° C. and a melt index value of 25 g / 10 min as a polymer component A, a polyethylene terephthalate polymer having a melting point of 258 ° C. and an intrinsic viscosity of 0.70 as a polymer component B, and composite spinning The two-component composite continuous fiber was melt spun through a spinneret having 200 holes. At the time of melt spinning, the melting temperature of the polymer component A was 230 ° C, and the single hole discharge rate was 0.60 g /
Min, the melting temperature of polymer component B is 285 ° C, and the single-hole discharge rate is 0.6
It was 0 g / min [the ratio (weight ratio) of component A and component B was 1: 1]. After cooling the spun filament yarn, the spinneret bottom 12
Twenty-five filaments are sucked into each of eight air-suckers arranged at a position of 0 cm, and sucked at a speed of 3500 m / min.
The fibers were forcibly charged by a charging device to open the fibers, and the fibers were deposited on the moving web conveyor surface to obtain a web.
得られた2成分複合長繊維の横断面形状は,第3図に示
したように,重合体成分Aと,重合体成分Bからなる5
個の凸レンズ状横断面を有するセグメントとから構成さ
れるものであった。繊維断面を1000倍に拡大して撮影し
た断面写真を基にしR0,R1,R2,L及びHを求め,R1/R0,R2/
R0及びL/Hを算出したところ,R1/R0は1.4,R2/R0は6.3,L/
Hは2.5であった。また,この複合長繊維は割繊しておら
ず,ウエブは均一なものであった。As shown in FIG. 3, the cross-sectional shape of the obtained two-component composite continuous fiber is composed of polymer component A and polymer component B.
And a segment having a convex lens-shaped cross section. R 0 , R 1 , R 2 , L and H were calculated based on the cross-sectional photograph taken by enlarging the fiber cross section 1000 times, and R 1 / R 0 , R 2 /
When R 0 and L / H are calculated, R 1 / R 0 is 1.4, R 2 / R 0 is 6.3, L /
H was 2.5. The composite long fibers were not split and the web was uniform.
次に,得られたウエブに加熱された表面平滑なロール群
を使用して割繊・熱接着処理を2回施して不織布を得
た。この処理条件は,加熱ロール群の表面温度を115
℃,線圧力を100kg/cmとした。Next, a nonwoven fabric was obtained by subjecting the obtained web to splitting and heat-bonding treatment twice using a heated roll group having a smooth surface. This treatment condition is such that the surface temperature of the heating rolls is 115
℃, the line pressure was 100kg / cm.
得られた不織布は,目付けが50g/m2,タテ方向の引張強
力が5.2kg/3cm,ヨコ方向の引張強力が3.8kg/3cm,トータ
ルハンドが200gであった。不織布の任意の10個所を選
び,不織布の断面を100倍に拡大して断面写真を撮影
し,次いで,10枚の断面写真中,複合長繊維から剥離し
ている重合体成分Bのセグメント総数と存在する重合体
成分Bのセグメント総数とを求め,割繊割合を求めたと
ころ,割繊割合は80%であった。また,前記複合長繊維
の分割により発現した重合体成分Bのみから構成される
割繊長繊維の繊度を求めたところ,0.31デニールと極め
て細いものであった。The obtained non-woven fabric had a basis weight of 50 g / m 2 , a tensile strength in the vertical direction of 5.2 kg / 3 cm, a tensile strength in the horizontal direction of 3.8 kg / 3 cm, and a total hand of 200 g. Select any 10 points on the non-woven fabric, magnify the cross-section of the non-woven fabric 100 times, and take a cross-sectional photograph. Then, in the 10 cross-sectional photographs, the total number of segments of polymer component B peeled from the composite long fiber and When the total number of segments of the polymer component B present was determined and the splitting ratio was determined, the splitting ratio was 80%. Further, the fineness of the split filaments composed of only the polymer component B developed by the division of the composite filaments was determined to be 0.31 denier, which was extremely thin.
そして,この不織布は,繊細な表面形態を有するもので
あった。The non-woven fabric had a delicate surface morphology.
比較例1 融点が132℃,メルトインデツクス値が15g/10分のポリ
エチレン重合体を重合体成分Aとした以外は実施例1と
同様にして,分割型2成分複合長繊維を溶融紡出し,冷
却した後,エアーサツカにフイラメントを通して吸引
し,3500m/分の速度で引取り,帯電装置により強制的に
帯電させて繊維を開繊し,移動するウエブコンベア面上
に堆積させ,ウエブを得た。Comparative Example 1 A splittable bicomponent composite filament was melt-spun in the same manner as in Example 1 except that a polyethylene polymer having a melting point of 132 ° C. and a melt index value of 15 g / 10 min was used as the polymer component A. After cooling, it was sucked through a filament through an air filter, drawn at a speed of 3500 m / min, forcibly charged by a charging device to open the fibers, and deposited on the moving web conveyor surface to obtain a web.
得られた2成分複合長繊維の横断面形状は,第5図に示
したように,重合体成分Aと,重合体成分Bからなる5
個の凸レンズ状横断面を有するセグメントとから構成さ
れるものであった。繊維断面を撮影した断面写真を基に
しR0,R1,R2,L及びHを求め,R1/R0,R2/R0及びL/Hを算出
したところ,R1/R0は2.0,R2/R0は6.5,L/Hは0.7であっ
た。また,この複合長繊維は一部割繊しており,繊維の
開繊性が部分的に不良で,ウエブは均一性を欠くもので
あった。As shown in FIG. 5, the cross-sectional shape of the obtained bicomponent composite continuous fiber is composed of polymer component A and polymer component B.
And a segment having a convex lens-shaped cross section. R 0 based on cross-sectional photograph of the fiber cross section, obtains the R 1, R 2, L and H, was calculated R 1 / R 0, R 2 / R 0 and L / H, R 1 / R 0 Was 2.0, R 2 / R 0 was 6.5, and L / H was 0.7. In addition, the composite long fibers were partially split, and the openability of the fibers was partially defective, and the web lacked uniformity.
次に,実施例1と同様にして,得られたウエブに加熱さ
れた表面平滑なロール群を使用して割繊・熱接着処理を
2回施して不織布を得た。Next, in the same manner as in Example 1, the obtained web was subjected to splitting and heat-bonding treatment twice using a heated roll having a smooth surface to obtain a nonwoven fabric.
得られた不織布は,その割繊割合が90%と高く,繊細な
表面形態を有するものの,均一性を欠くものであった。The non-woven fabric obtained had a high splitting ratio of 90% and had a delicate surface morphology, but lacked uniformity.
実施例2 実施例1で得られたウエブに圧接面積率12%の加熱され
たエンボスロールを使用してエンボス処理を施し,不織
シートを得た。この処理条件は,加熱エンボスロールの
表面温度を120℃,線圧力を30kg/cmとした。Example 2 The web obtained in Example 1 was embossed using a heated embossing roll having a pressing area ratio of 12% to obtain a nonwoven sheet. The processing conditions were that the surface temperature of the heated embossing roll was 120 ° C and the linear pressure was 30 kg / cm.
次に,得られた不織シートに屈曲シワ加工処理を施し
た。Next, the obtained non-woven sheet was subjected to bending wrinkle processing.
得られた不織布は,目付けが60g/m2,タテ方向の引張強
力が12.6kg/3cm,ヨコ方向の引張強力が5.0kg/3cm,トー
タルハンドが65gであった。不織布の任意の10個所を選
び,割線割合を求めたところ,割線割合は95%であっ
た。また,前記複合長繊維の分割により発現した重合体
成分Bのみから構成される割繊長繊維の繊度を求めたと
ころ,0.31デニールと極めて細いものであった。そし
て,この不織布は,ドレープ性と繊細な表面形態を有す
るものであった。The obtained nonwoven fabric had a basis weight of 60 g / m 2 , a tensile strength in the vertical direction of 12.6 kg / 3 cm, a tensile strength in the horizontal direction of 5.0 kg / 3 cm, and a total hand of 65 g. When 10 parts of the non-woven fabric were selected and the percent score was calculated, the percent score was 95%. Further, the fineness of the split filaments composed of only the polymer component B developed by the division of the composite filaments was determined to be 0.31 denier, which was extremely thin. And this non-woven fabric had a drape property and a delicate surface morphology.
(発明の効果) 本発明の極細長繊維不織布は,重合体成分Aと重合体成
分Bとから構成される2成分複合長繊維と,前記2成分
複合長繊維から重合体成分Bからなるセグメントが一部
剥離した2成分複合長繊維と,前記2成分複合長繊維の
分割により発現した重合体成分Aのみから構成される割
繊長繊維と,前記重合体成分Bのみから構成される単糸
繊度が0.8デニール以下の割繊長繊維とから構成される
ものであり,強力に優れ,極めて均一性が高く,しかも
繊細な表面形態を有するため,医療衛生材用素材として
好適に使用することができる。(Effect of the Invention) The ultrafine long-fiber nonwoven fabric of the present invention comprises a two-component composite continuous fiber composed of a polymer component A and a polymer component B, and a segment composed of the two-component composite continuous fiber and the polymer component B. Partially separated two-component composite continuous fiber, split filament long fiber composed only of polymer component A developed by division of the two-component composite continuous fiber, and single yarn fineness composed only of the polymer component B. Is composed of split filaments of 0.8 denier or less and has excellent strength, extremely high uniformity, and delicate surface morphology, so it can be suitably used as a material for medical hygiene materials. .
なお,本発明の極細長繊維不織布は,従来のような複雑
な生産工程を必要とすることなく,低コストで効率よく
生産することができるものである。The ultrafine long-fiber nonwoven fabric of the present invention can be efficiently produced at low cost without requiring a complicated production process as in the past.
第1及び2図は,本発明における2成分複合長繊維の構
造を説明するための横断面図,第3及び4図は,本発明
の構成要件を満足する2成分複合長繊維の例を示す横断
面図,第5及び6図は,本発明の構成要件を満足しない
2成分複合長繊維の例を示す横断面図である。1 and 2 are cross-sectional views for explaining the structure of the bicomponent composite continuous fiber in the present invention, and FIGS. 3 and 4 show examples of the bicomponent composite continuous fiber satisfying the constituent requirements of the present invention. Cross-sectional views, FIGS. 5 and 6, are cross-sectional views showing examples of bicomponent composite filaments that do not satisfy the constituent requirements of the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松岡 文夫 京都府宇治市宇治小桜23番地 ユニチカ株 式会社中央研究所内 審査官 菊地 則義 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumio Matsuoka 23, Uji Kozakura, Uji City, Kyoto Prefecture Noriyoshi Kikuchi Examiner, Central Research Laboratory, Unitika Ltd.
Claims (1)
非相溶性の重合体成分Bからなる2個以上の凸レンズ状
横断面を有するセグメントとから構成される2成分複合
長繊維と,前記2成分複合長繊維から重合体成分Bから
なるセグメントが一部剥離した2成分複合長繊維と,前
記2成分複合長繊維の分割により発現した前記重合体成
分Aのみから構成される割繊長繊維と,前記重合体成分
Bのみから構成される単糸繊度が0.8デニール以下の割
繊長繊維とから構成される不織布であって,前記重合体
成分Aの融点と重合体成分Bの融点差が30℃以上であ
り,2成分複合長繊維の繊維軸に垂直な横断面における重
合体成分Aの外接円の半径R0,重合体成分Bの外接円の
半径R1,重合体成分Bからなる凸レンズ状部分において
重合体成分Aと接している円弧の曲率半径R2,円弧の弧
長L及び凸レンズ状部分の厚さHが下記,及び式
を満足し,重合体成分Bからなるセグメントの割繊割合
が30%以上95%以下であり,かつ繊維間が重合体成分A
又は重合体成分Bの内いずれか低融点側の重合体成分か
らなる繊維により少なくとも部分的に接着されているこ
とを特徴とする極細長繊維不織布。 R1/R0>1 …… R2/R0≧1 …… L/H≧1 ……1. A bicomponent composite continuous fiber comprising a polymer component A and a segment having two or more convex lens-shaped cross sections, which is composed of a polymer component B which is incompatible with the polymer component A. A split fiber composed only of a two-component composite continuous fiber in which a segment composed of a polymer component B is partly peeled from the two-component composite continuous fiber and the polymer component A developed by the division of the two-component composite continuous fiber. A melting point of the polymer component A and a melting point of the polymer component B, which is a non-woven fabric composed of long fibers and split filaments having a single yarn fineness of 0.8 denier or less, which is composed only of the polymer component B. Radius R 0 of the circumscribed circle of the polymer component A, radius R 1 of the circumscribed circle of the polymer component B, and polymer component B in the cross section perpendicular to the fiber axis of the bicomponent composite filament with a difference of 30 ° C or more. Is in contact with the polymer component A in the convex lens-like portion consisting of The radius of curvature R 2 of the circular arc, the thickness H of the arc length L and the convex lens shaped portion of the arc below, and satisfies the equation, split fiber proportion of segments of the polymer component B is 95% or less than 30% Moreover, the polymer component A is present between the fibers.
Alternatively, the ultrafine long-fiber nonwoven fabric is characterized in that it is at least partially adhered by a fiber composed of the polymer component on the low melting point side of the polymer component B. R 1 / R 0 > 1 …… R 2 / R 0 ≧ 1 …… L / H ≧ 1 ……
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2096894A JPH0726310B2 (en) | 1990-04-12 | 1990-04-12 | Extra-fine long-fiber non-woven fabric |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2096894A JPH0726310B2 (en) | 1990-04-12 | 1990-04-12 | Extra-fine long-fiber non-woven fabric |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03294557A JPH03294557A (en) | 1991-12-25 |
JPH0726310B2 true JPH0726310B2 (en) | 1995-03-22 |
Family
ID=14177087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2096894A Expired - Fee Related JPH0726310B2 (en) | 1990-04-12 | 1990-04-12 | Extra-fine long-fiber non-woven fabric |
Country Status (1)
Country | Link |
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JP (1) | JPH0726310B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5718972A (en) * | 1992-10-05 | 1998-02-17 | Unitika, Ltd. | Nonwoven fabric made of fine denier filaments and a production method thereof |
TW246699B (en) * | 1992-10-05 | 1995-05-01 | Unitika Ltd | |
FR2790489B1 (en) * | 1999-03-01 | 2001-04-20 | Freudenberg Carl Fa | TABLECLOTH NOT WOVEN IN THERMOLIA FILAMENTS OR FIBERS |
JP4704216B2 (en) * | 2006-01-18 | 2011-06-15 | 日本エステル株式会社 | Split composite short fiber and short fiber nonwoven fabric |
-
1990
- 1990-04-12 JP JP2096894A patent/JPH0726310B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH03294557A (en) | 1991-12-25 |
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