JP2958990B2 - Elastic nonwoven - Google Patents
Elastic nonwovenInfo
- Publication number
- JP2958990B2 JP2958990B2 JP25618989A JP25618989A JP2958990B2 JP 2958990 B2 JP2958990 B2 JP 2958990B2 JP 25618989 A JP25618989 A JP 25618989A JP 25618989 A JP25618989 A JP 25618989A JP 2958990 B2 JP2958990 B2 JP 2958990B2
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- Japan
- Prior art keywords
- fibers
- nonwoven fabric
- fiber
- elasticity
- sheet
- 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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Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、伸縮性と形態保持性および風合いの優れた
ポリエステル系エラストマー繊維からなり、メルトブロ
ー法により得られる伸縮性不織布に関する。Description: TECHNICAL FIELD The present invention relates to a stretchable nonwoven fabric made of a polyester elastomer fiber having excellent stretchability, shape retention and texture, and obtained by a melt blow method.
（従来の技術） ポリエステル系エラストマー繊維からなる、メルトブ
ロー法による不織布は、特開昭57−95362号公報に伸縮
性保温材として開示されている。この不織布は、構成繊
維の交点が融着接合一体化されたもので、該構成繊維は
0.01デニールから20デニールの範囲にばらつき大なるも
のであり従ってこの不織布にはゴワツキの問題がある。(Prior Art) A nonwoven fabric made of a polyester-based elastomer fiber by a melt blow method is disclosed in JP-A-57-95362 as a stretchable heat insulating material. In this nonwoven fabric, the intersections of the constituent fibers are fused and integrated, and the constituent fibers are
The non-woven fabric has a large variability in the range of 0.01 denier to 20 denier, and thus has a problem of stiffness.
特開昭57−82552号公報には布と積層しニードルパン
チにより三次元交絡後布を剥離し一体化した不織布が開
示されているが、糸経が太い場合損傷は少ないが細くな
ると損傷は著しくなり極細伸縮性繊維からなる品質良好
な交絡不織布は得られにくい。Japanese Patent Application Laid-Open No. 57-82552 discloses a nonwoven fabric in which a fabric is laminated and then three-dimensionally entangled with a needle punch, and then the fabric is peeled off and integrated. It is difficult to obtain a high-quality entangled nonwoven fabric made of ultrafine stretchable fibers.
又、特開昭60−17162号公報にはポリエステル系エラ
ストマー繊維からなるメルトブロー法による不織布とカ
ードウエッブをニードルパンチで交絡一体化した不織布
が開示されているが、極細エラストマー繊維では損傷が
著しく好ましくない。JP-A-60-17162 discloses a nonwoven fabric formed by entanglement and integration of a nonwoven fabric made of a polyester elastomer fiber by a melt blow method and a card web with a needle punch, but damage is extremely unfavorable with an ultrafine elastomer fiber. .
（発明が解決しようとする課題） 本発明は、鋭意検討の結果、水流による三次元交絡に
より繊維の損傷を押さえられかつ柔軟性と伸縮性が同時
に向上する知見を得て本発明に到達したもので、従来の
伸縮性不織布を改良し、ポリエステル系エラストマーの
極細繊維からなる伸縮性と形態保持性および風合いの優
れ、損傷の無い伸縮性不織布を提供しようとするもので
ある。(Problems to be Solved by the Invention) As a result of intensive studies, the present invention has reached the present invention by finding that fibers are prevented from being damaged by three-dimensional entanglement due to water flow and that flexibility and stretchability are simultaneously improved. It is an object of the present invention to improve a conventional stretchable nonwoven fabric and provide a stretchable nonwoven fabric made of ultrafine fibers of a polyester-based elastomer, which has excellent stretchability, shape retention and texture, and has no damage.
（課題を解決するための手段） 本発明は、前記課題を解決するために次の手段を取る
ものである。(Means for Solving the Problems) The present invention adopts the following means to solve the problems.
即ち、本発明は、繊維平均径が0.5〜５μｍ、繊維径
の変動率が0.3以下のポリエステル系エラストマー繊維
からなり、メルトブロー法により得られる不織布であっ
て、高圧水流により３次元的に交絡され、縦方向及び横
方向の回復率が各々75％及び64％を超え、50％伸長歪付
与後に形態変化が認められないことを特徴とする伸縮性
不織布である。That is, the present invention is a nonwoven fabric made of a polyester-based elastomer fiber having an average fiber diameter of 0.5 to 5 μm and a fluctuation rate of the fiber diameter of 0.3 or less, obtained by a melt blow method, and three-dimensionally entangled by a high-pressure water flow, A stretchable nonwoven fabric characterized in that the recovery rates in the machine direction and the transverse direction exceed 75% and 64%, respectively, and that no morphological change is observed after applying 50% elongation strain.
（作用） 本発明の伸縮性不織布の構成繊維組成であるポリエス
テル系エラストマーとは、ハードセグメントをポリブチ
レンテレフタレート、ソフトセグメントはポリテトラメ
チレングリコールとのブロック共重合物（PELと略す）
またはポリカプロラクタムとのブロック重合物（SELと
略す）およびそれらの改質ポリマーや他の成分を加えた
組成物も包含される。ポリエステル系エラストマーは、
ポリウレタン系エラストマーに比し耐熱性、耐候性、耐
油性等に優れている。(Function) The polyester elastomer which is a constituent fiber composition of the stretchable nonwoven fabric of the present invention is a block copolymer of hard segment with polybutylene terephthalate and soft segment with polytetramethylene glycol (abbreviated as PEL).
Alternatively, a composition obtained by adding a block polymer with polycaprolactam (abbreviated as SEL) and a modified polymer thereof or other components is also included. Polyester elastomers
Excellent heat resistance, weather resistance, oil resistance, etc., compared to polyurethane elastomers.
ソフトセグメントの成分比は、重量比で４％以上60％
以下、高度の伸縮性を付与する為には15％以上が好まし
い。The composition ratio of the soft segment is 4% or more and 60% by weight.
Hereinafter, in order to provide a high degree of elasticity, 15% or more is preferable.
本発明の伸縮性不織布は、好ましくは実質的に長繊維
からなる不織布である。実質的に長繊維とは構成繊維の
90％以上が繊維長と繊維径の比（アスペクト比）が106
以上であるものを言う。短繊維不織布は伸縮性や強力が
劣り、その物が発埃性を持つ為好ましくない。又、交絡
処理により繊維が切断したものは好ましくない。本発明
の好ましい状態は、切断端が不織布表面1cm2当たり200
個以下より好ましくは50個以下である。The stretchable nonwoven fabric of the present invention is preferably a nonwoven fabric substantially composed of long fibers. Substantially long fibers are the constituent fibers
90% or more has a fiber length to fiber diameter ratio (aspect ratio) of 10 6
Say what is above. Short-fiber nonwoven fabrics are not preferred because they are inferior in stretchability and strength and have dusting properties. Also, fibers cut by the entanglement treatment are not preferred. Preferred conditions of the present invention, the cutting end surface of the nonwoven fabric 1 cm 2 per 200
The number is more preferably 50 or less.
本発明の不織布はメルトブロー法でシート化するのが
好ましい。スパンボンド法ではゴム弾性が細化時発現し
シート状に引き取ることが困難になるためである。The nonwoven fabric of the present invention is preferably formed into a sheet by a melt blow method. This is because in the spun bond method, rubber elasticity is developed at the time of thinning, and it is difficult to take the sheet into a sheet.
本発明の伸縮性不織布構成繊維の平均径は0.5μｍ未
満では伸縮性が低下し強力も弱くなり、５μｍを越える
と柔らかでソフトな風合いが損なわれるので、0.5μｍ
から５μｍとするのが好ましい。より好ましくは１μｍ
から４μｍである。繊維径の変動率は、大きくなると太
い繊維を含みゴワツキがでるので0.3以下が好ましい。When the average diameter of the constituent nonwoven fabric fibers of the present invention is less than 0.5 μm, the elasticity is reduced and the strength is weakened, and when it exceeds 5 μm, the soft and soft texture is impaired.
To 5 μm. More preferably 1 μm
To 4 μm. The fluctuation rate of the fiber diameter is preferably 0.3 or less because the larger the diameter, the thicker the fiber and the more rugged the fiber.
本発明の伸縮性不織布は三次元的に高圧水流で交絡さ
れている。交絡処理による三次元一体化されることで不
織布に伸縮性と同時に形態保持性や柔軟な風合いが付与
される。交絡処理法としてニードルパンチ法が知られて
いるが繊維径が細くなるとゴム弾性を有する繊維では繊
維の損傷が著しくなり好ましくない。The stretchable nonwoven fabric of the present invention is three-dimensionally entangled by a high-pressure water flow. By being three-dimensionally integrated by the entanglement process, the nonwoven fabric is given elasticity, shape retention, and soft texture. The needle punching method is known as a confounding treatment method. However, if the fiber diameter becomes small, the fiber having rubber elasticity is significantly damaged, which is not preferable.
本発明の処理法として高圧水流による方法（スパンレ
ース法）が採用される。鱗片状に積層された二次元的に
繊維どうしが交絡した薄層を断面方向にも同様に繊維ど
うしを交絡させ三次元一体化されることにより伸縮性と
同時に不織布強力、変形に対応出来る形態保持性、およ
び柔軟な風合いが増大する。この理由はよく判らない
が、水圧による切断に到らない範囲での繊維どうしのマ
イグレーションと揉み効果による繊維どうしの引きつり
等の緊張が緩和低減化するためではないかと推測され
る。繊維は鱗片状シートを貫通している必要はあるが、
表層の繊維が裏層まで貫通している必要はない。この事
は面でずれさらに断面でずれることで伸長性が増加し大
きい変形を可能にするではないかと推測される。大変形
で破壊しない理由は、推測するに繊維自身が伸縮性を持
ちかつ鱗片状薄層を貫通した繊維が伸縮性を有するが故
に薄層間で貫通部のみ縮み楔の働きをするのではないか
と考えられる。As the treatment method of the present invention, a method using a high-pressure water flow (spunlace method) is employed. A thin layer of two-dimensionally entangled fibers laid in a scaly shape is also entangled with each other in the cross-sectional direction, and is three-dimensionally integrated. Gender and soft texture are increased. The reason for this is not well understood, but it is presumed that the reason is that the tension between the fibers, such as migration between the fibers and the pulling of the fibers due to the kneading effect, is reduced and reduced in a range that does not lead to cutting by water pressure. The fibers need to penetrate the flaky sheet,
The surface fibers need not penetrate to the back layer. It is presumed that this may increase the extensibility by displacing the surface and further displacing the cross section, thereby enabling a large deformation. The reason why it does not break due to large deformation is presumed that the fiber itself has elasticity and the fiber penetrating the flaky thin layer has elasticity, so only the penetrating part between the thin layers does not act as a wedge It is thought.
この様な現象はニードルパンチ交絡処理では起こらな
いと考えられる。It is considered that such a phenomenon does not occur in the needle punch confounding process.
細い繊維から構成されるもので構成繊維本数が多くな
り有効交絡点も増加し形態保持性は太い繊維から構成し
たものより改良されたと考えられる。It is considered that the fibers composed of fine fibers increased the number of constituent fibers, increased the number of effective entanglement points, and the shape retention was improved as compared with those composed of thick fibers.
さらに繊維が互いに独立して接着されていないため伸
長時の自由度が大きくなり伸縮性が改良されたと考えら
れる。Further, it is considered that since the fibers were not bonded independently of each other, the degree of freedom at the time of elongation was increased and the stretchability was improved.
繊維同志を相互に交絡させ伸縮性や強力形態保持性及
び柔軟な風合いを付与する交絡処理は出来るだけ細かい
ピッチで行われるのが好ましい。例えば交絡点間距離
は、好ましくは20mm以下、より好ましくは10mm以下であ
るがあまり細かいピッチで交絡処理されると強力、形態
保持性は増加するものの伸縮性が少し低下するので所望
の伸縮性になる適切な条件を選択すればよい。It is preferable that the entanglement treatment for imparting elasticity, strong form retention and soft texture by interlacing fibers with each other is performed at a pitch as fine as possible. For example, the distance between the confounding points is preferably 20 mm or less, more preferably 10 mm or less, but strong when entangled at a very fine pitch, the shape retention is increased but the elasticity is slightly reduced, so that the desired elasticity is obtained. What is necessary is just to select an appropriate condition.
好ましい本発明の伸縮性不織布を得る方法は例えば以
下の方法が例示できる。A preferred method for obtaining the stretchable nonwoven fabric of the present invention is, for example, the following method.
実質的に細い長繊維からなる鱗片状薄層が積層された
シートはメルトブロー法で形成する。他の方法は積層シ
ート化が困難な為である。The sheet in which the scale-like thin layers composed of substantially thin long fibers are laminated is formed by a melt blow method. The other method is because it is difficult to form a laminated sheet.
メルトブロー法として基本的には公知の方法を採用出
来るが、極細で糸切れを生じない条件を選択する必要が
ある。A known method can be basically used as the melt blow method, but it is necessary to select a condition that is extremely fine and does not cause thread breakage.
不織布に伸縮性と形態保持性を与えるには構成繊維の
強力は高いほうが好ましく繊維の強力を保持するにはポ
リマーの分子量を下げないで劣化を押さえるのが良いの
で劣化を押さえるために滞留時間は短く紡糸温度は出来
るだけ低く、しかし細い繊維を得るためにはスムースに
伸長できる粘度を保てる温度を設定する。In order to impart elasticity and shape retention to the nonwoven fabric, the strength of the constituent fibers is preferably higher.To maintain the strength of the fibers, it is better to suppress deterioration without lowering the molecular weight of the polymer. The spinning temperature is short and the temperature is as low as possible, but in order to obtain fine fibers, the temperature is set so that the viscosity can be extended smoothly.
牽引流体は細くできて糸切れしない温度と流速となる
条件を選択する必要がある。It is necessary to select a condition in which the traction fluid has a temperature and a flow rate at which the traction fluid can be made thin and the thread does not break.
吐出孔径は細いほうが均繊度の良い細い繊維が得られ
易いが所望の繊維径になる適切な吐出量その他の条件と
の兼ね合いで設定する必要がある。The smaller the discharge hole diameter is, the more easily fine fibers having a good uniformity can be obtained. However, it is necessary to set the discharge hole diameter in consideration of an appropriate discharge amount and other conditions to obtain a desired fiber diameter.
また均繊度の良好な糸切れしない繊維を得る条件とし
て粘度斑、温度斑、流速斑、吐出斑のないノズル構造と
するのが好ましい。Further, as a condition for obtaining a fiber having good uniformity and not breaking yarn, it is preferable to use a nozzle structure free from unevenness in viscosity, unevenness in temperature, unevenness in flow velocity, and unevenness in discharge.
更には開繊度の良好な伸縮性不織布とするにはノズル
の孔間ピッチを短くし過ぎると紐状化するので適切な間
隔を選択する必要がある。Further, in order to form a stretchable nonwoven fabric having a good degree of opening, if the pitch between the nozzle holes is too short, a string is formed. Therefore, it is necessary to select an appropriate interval.
引取り条件ではノズルと引取りネット間距離が短すぎ
ると繊維同志が融着して伸縮性が低下したり風合いが硬
くなり、他方長過ぎると牽引流体の失速により繊維同志
が交絡し紐状化が多くなるので開繊度の良好な伸縮性不
織布となる適切な距離を選択するのが好ましい。Under the take-off conditions, if the distance between the nozzle and the take-off net is too short, the fibers will fuse together and the elasticity will decrease or the texture will become hard, while if it is too long, the fibers will become entangled due to the stall of the pulling fluid, forming a string. Therefore, it is preferable to select an appropriate distance that results in a stretchable nonwoven fabric having a good degree of opening.
また繊維の配列状態により特定方向にしか伸縮性が付
与出来ないことがあり所望の伸縮性付与方向により繊維
の配列状態を選択し条件を決める必要がある。In addition, depending on the arrangement state of the fibers, the elasticity can be given only in a specific direction, and it is necessary to select the arrangement state of the fibers and determine the conditions depending on the desired direction of imparting the elasticity.
次いで積層されたシートは高圧水流にて三次元的に交
絡する。Next, the laminated sheets are three-dimensionally entangled by a high-pressure water flow.
高圧水流での三次元交絡処理は基本的には公知の方法
を使える。A known method can be basically used for the three-dimensional confounding treatment with a high-pressure water flow.
高圧水流での三次元交絡処理はシートの片面のみでも
よいが好ましくは両面から水流で処理することで表面か
ら裏面まで繊維を貫通させずに鱗片状薄層間を繊維で相
互に交絡させると前記推測機構効果が大きな変形に耐え
伸縮性を向上できる。The three-dimensional entanglement treatment with a high-pressure water stream may be performed only on one side of the sheet, but preferably the flake-like thin layers are entangled with fibers without penetrating the fibers from the surface to the back side by treating with water streams from both sides. The estimating mechanism effect can withstand large deformation and improve the elasticity.
水流ノズルの孔径は細いほうが水流の貫通孔が残りが
難く、交絡力は少し弱くなるがシートの厚みが薄くても
繊維の損傷を殆ど起こさせず鱗片薄層間の交絡が可能と
なる条件がとれるのでシートの厚みや繊維径を考慮して
適正な条件を選択する。保持ネットの網目は細かい方が
均質な交絡が可能となるが交絡点密度や部分貫通点の必
要度合い等により網目の形態を選択する。The smaller the diameter of the water nozzle, the harder it is for the through-hole of the water stream to remain, and the lower the confounding force. Therefore, appropriate conditions should be selected in consideration of sheet thickness and fiber diameter. The finer the mesh of the holding net is, the more uniform the confounding becomes possible. However, the form of the mesh is selected according to the density of the confounding points and the necessary degree of the partial penetration points.
水流の圧力は交絡させる断面の厚みにも依存するが、
余り高いと伸縮性繊維のため無理な交絡による締まり過
ぎによる伸縮性低下や著しい場合伸長限界を越えて繊維
が破断損傷する場合もあるので、シートの厚みや繊維径
を考慮し所望の交絡点密度や部分貫通点の必要度合い等
を満たす適度な圧力条件を選択するのが良い。The pressure of the water flow depends on the thickness of the cross section to be entangled,
If it is too high, the stretchable fiber may cause excessive constriction due to excessive entanglement. It is preferable to select an appropriate pressure condition that satisfies the required degree of the partial penetration point or the like.
シートの表から裏まで全ての交絡点が貫通していると
不織布強力は強くなるが伸縮性は低下するので所望の伸
縮性、強力、形態保持性、風合いに応じて交絡状態をコ
ントロール出来る。例えば水流ノズルの孔径や管長を変
えたノズルを所望の分布に対応させ設置する等の方法も
出来る。幅方向の交絡密度はノズルの孔間隔で決まるの
で細かくするには千鳥配列等による並列化も選択出来
る。If all of the entangled points penetrate from the front to the back of the sheet, the strength of the nonwoven fabric increases but the stretchability decreases, so that the entangled state can be controlled according to the desired stretchability, strength, shape retention and texture. For example, it is also possible to adopt a method in which nozzles having different hole diameters or pipe lengths of the water flow nozzles are installed so as to correspond to a desired distribution. Since the entanglement density in the width direction is determined by the interval between the holes of the nozzles, parallel arrangement using a staggered arrangement or the like can also be selected for fineness.
縦方向の間隔は処理速度に依存する。所望の密度とな
るよう速度を設定する。またランダム化や文様状の交絡
点を必要とするときは水流ノズルを回転させたり一定周
期の旋回をさせる等の方法も使える。The vertical spacing depends on the processing speed. Set the speed to the desired density. When randomization or a pattern-like confounding point is required, a method such as rotating the water jet nozzle or turning at a constant cycle can be used.
上述の選択条件は素材により異なるので所望の性能か
ら素材および条件はその都度設定するのが好ましい。Since the above-described selection conditions differ depending on the material, it is preferable to set the material and the condition each time from desired performance.
高圧水流で三次元交絡後シートは水分を除去するため
熱風等で乾燥するが、熱風温度が高過ぎると融着するの
で素材に応じた適切な温度を設定する。また乾燥を効率
よく行うためにサクション等で取れる水分は出来るだけ
除去するのが良い。After three-dimensional entanglement with a high-pressure water stream, the sheet is dried with hot air or the like to remove moisture. However, if the temperature of the hot air is too high, the sheet is fused, so an appropriate temperature is set according to the material. Further, in order to perform drying efficiently, it is preferable to remove as much moisture as possible by suction or the like.
必要に応じ乾燥前に薬液処理し次いで乾燥することも
できる。以上の方法により得られた不織布は幅2cm試料
長10cm、伸長速度100％、伸長歪み50％で１分保持後回
復させ５分放置の縦方向の回復率が75％を超え、横方向
の回復率が64％を超えるといった、極めて高伸縮性の不
織布となる。If necessary, it may be treated with a chemical solution before drying and then dried. The nonwoven fabric obtained by the above method was recovered after holding for 1 minute at a width of 2 cm, a sample length of 10 cm, an elongation speed of 100%, and an elongation strain of 50%, and the recovery rate in the vertical direction after leaving for 5 minutes exceeded 75%, and in the horizontal direction. An extremely high elasticity nonwoven fabric having a ratio exceeding 64% is obtained.
（実施例） 実施例１ ポリブチレンテレフタレート／ポリテトラメチレング
リコールを75/25重量比ブロック共重合した極限粘度0.8
（30℃、フェノール／テトラクロロエタン重量比50/5
0）のポリマーを270℃にて孔径0.15mmのノズルより単孔
吐出量0.5g/分にて吐出し、290℃の空気にてリップ背面
圧力2kg/cm2にて紡出し、ノズルからの距離50cmでサク
ションされたネットに鱗片状薄層として積層されたシー
トとして引取った。得られたシートの目付は50g/m2、見
掛けの嵩0.1g/cm3で繊維配列はランダムで紐状化は少な
いものであった。また構成繊維の平均繊維径は1.8μ
ｍ、糸径の変動率は0.15、極限粘度は0.72であった。(Example) Example 1 Intrinsic viscosity of poly (butylene terephthalate) / polytetramethylene glycol in a 75/25 weight ratio block copolymer of 0.8
(30 ℃, phenol / tetrachloroethane weight ratio 50/5
The polymer of 0) is discharged at a single hole discharge rate of 0.5 g / min from a nozzle with a hole diameter of 0.15 mm at 270 ° C, and spun with 290 ° C air at a back pressure of the lip of 2 kg / cm 2 and distance from the nozzle. It was taken up as a sheet laminated as a flaky thin layer on a net suctioned at 50 cm. The weight of the obtained sheet was 50 g / m 2 , the apparent bulk was 0.1 g / cm 3 , the fiber arrangement was random, and the stringing was small. The average fiber diameter of the constituent fibers is 1.8μ
m, the fluctuation rate of the yarn diameter was 0.15, and the intrinsic viscosity was 0.72.
次いで、前記のシートを孔径0.1mmのノズルをピッチ3
mm間隔になるように設置した交絡装置を表面側処理用に
直列に３台並べそれぞれの圧力を20kg/cm2、50kg/cm2、
100kg/cm2として高圧水流処理を行った。このときの端
持ネットは100メシュの金網を用い処理速度は20m/分で
行った。次いで裏面を同様にして処理し50℃の熱風にて
常法で乾燥し得られた不織布の伸縮性は縦方向の回復率
が99％、横方向の回復率が97％と優れ、50％伸長歪み付
与後も形態には変化が見られずソフトでドレープ性にも
優れていた。Next, the above-mentioned sheet was sprayed with a nozzle having a pore diameter of 0.1 mm at a pitch
Three entanglement devices installed at a distance of mm are arranged in series for surface treatment, and the pressure of each is 20 kg / cm 2 , 50 kg / cm 2 ,
High pressure water flow treatment was performed at 100 kg / cm 2 . The end holding net at this time was a 100 mesh wire net, and the processing speed was 20 m / min. Next, the back side is treated in the same manner and dried in a conventional manner with hot air at 50 ° C. The stretchability of the obtained non-woven fabric is excellent at 99% in the vertical direction and 97% in the horizontal direction, and is 50% elongation No change was observed in the morphology even after the strain was applied, and it was soft and had excellent drapability.
比較例１ 実施例１の高圧水流処理前のシートを比較のため熱圧
着ローラーにてクリアランス0.1mm、温度80℃にて熱圧
着して得たシートの伸長回復率は縦方向70％、横方向61
％と伸縮性はやや劣る。50％伸長歪み付与後の形態は交
絡圧着点が部分的にはずれ伸びており形態保持性も少し
劣る。またペーパーライクで柔軟性にもやや劣る。Comparative Example 1 The sheet before the high-pressure water flow treatment of Example 1 was subjected to thermocompression bonding with a thermocompression roller at a clearance of 0.1 mm and a temperature of 80 ° C. at a temperature of 80 ° C. for comparison. 61
% And elasticity are slightly inferior. In the morphology after the 50% elongation strain is applied, the entangled pressure bonding point is partially displaced and extended, and the morphological retention is slightly inferior. It is also paper-like and slightly less flexible.
比較例２ 実施例１の高圧水流処理前のシートを目付80g/m2のイ
ンターロックと積層し片面を30本/m2ニードルパンチを
施したインターロックを剥離して（若干剥離しにくい）
得た不織布の裏面には抜けた繊維が玉状化したもの以外
にニードルパンチで損傷したと思われる切断端が多数認
められ叩くと挨が少し発生した。この不織布の縦方向の
伸長回復率は74％、横方向の伸長回復率は66％と伸縮性
はやや劣り50％伸長歪み付与後の形態は交絡部の部分的
破壊を生じ伸びて変形していた。また風合いはややは硬
く柔軟性にやや欠ける。Comparative Example 2 The sheet before high-pressure water flow treatment of Example 1 was laminated with an interlock having a basis weight of 80 g / m 2 , and the interlock on which one side was subjected to needle punching with 30 pieces / m 2 was peeled off (slightly hard to peel off).
On the back side of the obtained non-woven fabric, a large number of cut ends considered to have been damaged by needle punching were found in addition to the beaded fibers, and a small amount of tapping occurred when hit. The non-woven fabric has a 74% longitudinal elongation recovery rate and a 66% lateral elongation recovery rate, which is slightly inferior in elasticity. Was. In addition, the texture is somewhat hard and lacks flexibility.
比較例３ ノズル引取り間距離を20cmにて引き取った以外実施例
１の条件と同じで得た高圧水流処理前のシートは目付50
g/m2見掛けの嵩0.24g/cm3で繊維配列はランダムだが各
繊維の交点の大部分が接着したペーパーライクなシート
であった。平均繊維径は２μｍ、糸径の変動率は0.2、
極限粘度は0.72であった。得られたシートの伸縮性はや
や劣り50％以上の変形後は繊維間の接合点が切れ形態が
変化する。またソフトさとドレープ性にやや欠ける。Comparative Example 3 A sheet before high-pressure water flow treatment obtained under the same conditions as in Example 1 except that the distance between the nozzles was taken at 20 cm was 50%.
The paper-like sheet was g / m 2 with an apparent bulk of 0.24 g / cm 3 and a random fiber arrangement, but most of the intersections of the fibers were adhered. The average fiber diameter is 2 μm, the fluctuation rate of the yarn diameter is 0.2,
The intrinsic viscosity was 0.72. The elasticity of the obtained sheet is slightly inferior, and after the deformation of 50% or more, the joining point between the fibers breaks and the form changes. Also lacks softness and drape.
なお幅2cm試料長10cm、伸長速度100％、伸長歪み50％
で１分保持後回復させ５分放置の縦方向の回復率は75
％、横方向の回復率は64％であった。In addition, width 2cm sample length 10cm, elongation speed 100%, elongation strain 50%
Hold for 1 minute and recover for 5 minutes.
%, And the lateral recovery was 64%.
（発明の効果） 本発明の伸縮性不織布は、伸縮性、形態保持性、風合
いに優れており嵩もあり防塵性であり更に繊維径が細い
ものでは構成本数が多くなり空孔径も小さくなるため被
覆性、バリヤー性、保温性、透湿防水性等の機能も付加
され、さらに成形加工性に優れており保温材、防塵服、
防御服、マスク、手術用品、衛材、人工皮膚、人工血管
等の多くの用途に有用である。(Effect of the Invention) The stretchable nonwoven fabric of the present invention is excellent in stretchability, shape retention and texture, bulky and dustproof, and when the fiber diameter is small, the number of constituents increases and the pore diameter decreases. Functions such as covering properties, barrier properties, heat retention, moisture permeability and waterproofness are also added, and furthermore, it is excellent in moldability and heat insulation, dustproof clothing,
It is useful for many uses such as protective clothing, masks, surgical supplies, sanitary materials, artificial skin, artificial blood vessels, and the like.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−17162（ＪＰ，Ａ) 特開 平１−148856（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) D04H 3/00 - 3/16 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-17162 (JP, A) JP-A-1-148856 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) D04H 3/00-3/16
Claims (1)
率が0.3以下のポリエステル系エラストマー繊維からな
り、メルトブロー法により得られる不織布であって、高
圧水流により３次元的に交絡され、縦方向及び横方向の
回復率が各々75％及び64％を超え、50％伸長歪付与後の
形態変化が認められないことを特徴とする伸縮性不織
布。1. A nonwoven fabric made of a polyester elastomer fiber having an average fiber diameter of 0.5 to 5 μm and a fluctuation rate of the fiber diameter of 0.3 or less, obtained by a melt blow method, and three-dimensionally entangled by a high-pressure water flow. A stretchable nonwoven fabric characterized in that the recovery rate in the direction and in the transverse direction exceeds 75% and 64%, respectively, and that no morphological change is observed after applying 50% elongation strain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25618989A JP2958990B2 (en) | 1989-09-29 | 1989-09-29 | Elastic nonwoven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25618989A JP2958990B2 (en) | 1989-09-29 | 1989-09-29 | Elastic nonwoven |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03119164A JPH03119164A (en) | 1991-05-21 |
| JP2958990B2 true JP2958990B2 (en) | 1999-10-06 |
Family
ID=17289146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25618989A Expired - Fee Related JP2958990B2 (en) | 1989-09-29 | 1989-09-29 | Elastic nonwoven |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2958990B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3636819B1 (en) * | 2017-06-08 | 2022-11-09 | Kuraray Kuraflex Co., Ltd. | Fiber structure, molded body and sound-absorbing material |
| CN107938176A (en) * | 2017-12-12 | 2018-04-20 | 马鞍山市鑫程纳米新材料科技有限公司 | A kind of preparation method of high-strength meltblown non-woven fabrics |
-
1989
- 1989-09-29 JP JP25618989A patent/JP2958990B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03119164A (en) | 1991-05-21 |
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