JP2003041435A - Method for producing polytrimethylene terephthalate staple fiber - Google Patents
Method for producing polytrimethylene terephthalate staple fiberInfo
- Publication number
- JP2003041435A JP2003041435A JP2001225647A JP2001225647A JP2003041435A JP 2003041435 A JP2003041435 A JP 2003041435A JP 2001225647 A JP2001225647 A JP 2001225647A JP 2001225647 A JP2001225647 A JP 2001225647A JP 2003041435 A JP2003041435 A JP 2003041435A
- Authority
- JP
- Japan
- Prior art keywords
- polytrimethylene terephthalate
- polyester
- polymer
- hollow
- fiber
- 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
- Artificial Filaments (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、三次元捲縮を有す
るポリトリメチレンテレフタレート系ポリエステル短繊
維の製造方法に関する。TECHNICAL FIELD The present invention relates to a method for producing polytrimethylene terephthalate-based polyester staple fibers having three-dimensional crimps.
【０００２】[0002]
【従来の技術】ポリトリメチレンテレフタレート系ポリ
エステル短繊維はポリエステル本来の特性である優れた
寸法安定性、耐光性、低吸湿性、熱セット性を維持し、
かつ低弾性率、弾性回復率および易染性に優れた特性を
持っており、詰綿、不織布、紡績糸織物等への実用化を
目指して、様々な角度よりポリトリメチレンテレフタレ
ート系ポリエステル短繊維製造技術が検討されている。2. Description of the Related Art Polytrimethylene terephthalate polyester short fibers maintain the original characteristics of polyester such as excellent dimensional stability, light resistance, low moisture absorption, and heat setting property.
In addition, it has excellent properties such as low elastic modulus, elastic recovery rate, and easy dyeability. Polytrimethylene terephthalate polyester staple fibers from various angles aiming at practical application in stuffed cotton, nonwoven fabric, spun yarn fabric, etc. Manufacturing technology is being studied.
【０００３】たとえば、特公昭４９−２１２５６号公報
には繊維屈曲復元性を改善したポリトリメチレンテレフ
タレート系ポリエステル短繊維の技術が開示されてい
る。また、特開平１１−１８９９３８号公報には伸張回
復率、弾性回復率を改善したポリトリメチレンテレフタ
レート系ポリエステル短繊維の技術が開示されている。
しかしながら、このような従来ポリエチレンテレフタレ
ート短繊維を製造する方法および条件でポリトリメチレ
ンテレフタレート系ポリエステル短繊維を製造しても、
その捲縮性能は平面的な、いわゆる二次元捲縮にとどま
り、詰綿等で要求される三次元捲縮は得られない。For example, Japanese Patent Publication No. 49-21256 discloses a technique of polytrimethylene terephthalate type polyester short fibers having improved fiber bending recovery. Further, Japanese Patent Application Laid-Open No. 11-189938 discloses a technique of polytrimethylene terephthalate type polyester short fiber having improved elongation recovery rate and elastic recovery rate.
However, even if the polytrimethylene terephthalate polyester short fibers are produced by the method and conditions for producing such conventional polyethylene terephthalate short fibers,
The crimping performance is limited to a flat, so-called two-dimensional crimp, and the three-dimensional crimp required for stuffing cannot be obtained.
【０００４】また、米国特許第３，６８１，１８８号に
は異方冷却、延伸後定長下アニーリングおよび熱弛緩処
理により製造した三次元捲縮をもつポリトリメチレンテ
レフタレート系ポリエステル繊維が開示されている。し
かしながら、このような従来ポリエチレンテレフタレー
ト繊維で用いられている異方冷却条件下では、吐出され
たポリトリメチレンテレフタレート系ポリエステルポリ
マー流に充分な異方冷却効果を付与することができず、
得られたポリトリメチレンテレフタレート系ポリエステ
ル繊維には充分な三次元捲縮は発現しない。一方、ポリ
エチレンテレフタレートと同様な異方冷却効果を得るた
めには、ポリトリメチレンテレフタレート系ポリエステ
ル溶融時の温度を大幅に低下させる、冷却風を大幅に増
量する、あるいは吐出ポリマー流を冷却板に直接接触さ
せる等の操作が必要であり、このような方法において
は、紡糸工程での断糸多発あるいは生産性の低い低紡糸
速度領域での生産しかできないなどの問題があった。US Pat. No. 3,681,188 discloses a polytrimethylene terephthalate type polyester fiber having three-dimensional crimp produced by anisotropic cooling, annealing after stretching and annealing under a fixed length and heat relaxation treatment. There is. However, under the anisotropic cooling conditions used for such conventional polyethylene terephthalate fibers, it is not possible to impart a sufficient anisotropic cooling effect to the discharged polytrimethylene terephthalate-based polyester polymer flow,
The obtained polytrimethylene terephthalate-based polyester fiber does not exhibit sufficient three-dimensional crimp. On the other hand, in order to obtain the same anisotropic cooling effect as polyethylene terephthalate, the temperature at the time of melting the polytrimethylene terephthalate-based polyester is greatly reduced, the cooling air is greatly increased, or the discharged polymer flow is directly applied to the cooling plate. Operations such as contacting are required, and such a method has a problem that many yarn breakages occur in the spinning step or production can only be performed in a low spinning speed region where productivity is low.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、優れ
た三次元捲縮を有するポリトリメチレンテレフタレート
系ポリエステル短繊維を安定して製造する方法を提供す
ることにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for stably producing polytrimethylene terephthalate polyester short fibers having excellent three-dimensional crimp.
【０００６】[0006]
【課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した結果、ポリトリメチレンテレ
フタレート系ポリエステルにポリ乳酸を主成分とするポ
リエステルを１〜１０重量％の割合で混合後溶融あるい
は溶融後混合し、中空形成性吐出孔を有する紡糸口金よ
り吐出し、異方冷却を施し、紡糸引き取りした後、熱処
理することによって、優れた三次元捲縮を有するポリト
リメチレンテレフタレート系ポリエステル短繊維を安定
して製造できることを見出した。Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that polytrimethylene terephthalate-based polyester is used in an amount of 1 to 10% by weight of a polyester containing polylactic acid as a main component. Polytrimethylene terephthalate having excellent three-dimensional crimps by being melted after mixing or mixed after melting, discharged from a spinneret having hollow forming discharge holes, anisotropically cooled, taken up by spinning, and then heat-treated. It has been found that stable polyester short fibers can be produced stably.
【０００７】[0007]
【発明の実施の形態】本発明でいうポリトリメチレンテ
レフタレート系ポリエステルは、トリメチレンテレフタ
レート単位を主たる繰り返し単位とするポリエステルで
あって、本発明の目的を阻害しない範囲内で、例えば酸
成分を基準として１５モル％以下、好ましくは５モル％
以下で第三成分を共重合したポリエステルであっても良
い。BEST MODE FOR CARRYING OUT THE INVENTION The polytrimethylene terephthalate-based polyester referred to in the present invention is a polyester having a trimethylene terephthalate unit as a main repeating unit, and is, for example, based on an acid component within a range not impairing the object of the present invention. As 15 mol% or less, preferably 5 mol%
A polyester obtained by copolymerizing the third component may be used below.
【０００８】好ましく用いられる第三成分としては、例
えば、イソフタル酸、コハク酸、アジピン酸、２，６−
ナフタレンジカルボン酸、金属スルホイソフタル酸等の
酸成分や、１，４−ブタンジオール、１，６−ヘキサン
ジオール、シクロヘキサンジオール、シクロヘキサンジ
メタノール等のグリコール成分など、各種のものを用い
ることができ、紡糸安定性などを考慮して適宜選択すれ
ば良い。なお、ポリトリメチレンテレフタレート系ポリ
エステルの固有粘度（オルソ−クロロフェノールを溶媒
として使用し温度３５℃で測定）は０．５〜１．８の範
囲のものであれば良い。The third component preferably used is, for example, isophthalic acid, succinic acid, adipic acid, 2,6-
Various components such as acid components such as naphthalenedicarboxylic acid and metal sulfoisophthalic acid, and glycol components such as 1,4-butanediol, 1,6-hexanediol, cyclohexanediol, and cyclohexanedimethanol can be used. It may be appropriately selected in consideration of stability and the like. The intrinsic viscosity of polytrimethylene terephthalate polyester (measured at a temperature of 35 ° C. using ortho-chlorophenol as a solvent) may be in the range of 0.5 to 1.8.
【０００９】また、必要に応じて、各種の添加剤、例え
ば、艶消し剤、熱安定剤、消泡剤、整色剤、難燃剤、酸
化防止剤、紫外線吸収剤、赤外線吸収剤、蛍光増白剤、
着色顔料などを添加したポリトリメチレンテレフタレー
ト系ポリエステルであっても良い。If necessary, various additives such as matting agents, heat stabilizers, defoaming agents, color-adjusting agents, flame retardants, antioxidants, ultraviolet absorbers, infrared absorbers, and fluorescent enhancers. Whitening agent,
It may be a polytrimethylene terephthalate polyester to which a coloring pigment or the like is added.
【００１０】本発明に用いるポリ乳酸を主成分とするポ
リエステルとは、乳酸を主たる繰り返し単位とするポリ
エステルをいい、Ｌ−乳酸及び／又はＤ−乳酸成分が５
０重量％以上の重合体であり、ポリＬ−乳酸ホモポリマ
ー、ポリＤ−乳酸ホモポリマー、Ｌ−乳酸／Ｄ−乳酸共
重合ポリマー及びそれらに５０％以下の第２又は第３成
分を共重合及び／又は混合した物を包含する。共重合成
分としては、例えばエチレングリコール、ブタンジオー
ル、ヘキサンジオール、オクタンジオール、デカンジオ
ールなどのジオール、コハク酸、アジピン酸、セバシン
酸などのジカルボン酸、ヒドロキシアルキルカルボン
酸、ピバロラクトン、カプロラクトンなどの脂肪族ラク
トン、ポリエチレングリコールなどが挙げられる。な
お、分子量は１０００００〜３０００００の範囲ものが
好ましい。The polyester containing polylactic acid as a main component used in the present invention is a polyester containing lactic acid as a main repeating unit, and the L-lactic acid and / or D-lactic acid component is 5
It is a polymer of 0% by weight or more, and is copolymerized with poly L-lactic acid homopolymer, poly D-lactic acid homopolymer, L-lactic acid / D-lactic acid copolymer, and 50% or less of the second or third component. And / or mixtures. Examples of the copolymerization component include diols such as ethylene glycol, butanediol, hexanediol, octanediol and decanediol, dicarboxylic acids such as succinic acid, adipic acid and sebacic acid, aliphatic alkyls such as hydroxyalkylcarboxylic acid, pivalolactone and caprolactone. Examples include lactone and polyethylene glycol. The molecular weight is preferably 100,000 to 300,000.
【００１１】本発明では先ず、紡糸口金から吐出する以
前の工程で、ポリトリメチレンテレフタレート系ポリエ
ステルとポリ乳酸を主成分とするポリエステル（以下ポ
リマーＢと称する）とを混合することが重要である。ポ
リトリメチレンテレフタレート系ポリエステルとポリマ
ーＢとの混合は、溶融工程以前でお互いに固体の状態で
混合しても良いし、別途溶融した後溶融体同士を合流さ
せても良い。In the present invention, first of all, it is important to mix the polytrimethylene terephthalate polyester and the polyester containing polylactic acid as a main component (hereinafter referred to as polymer B) in the step before discharging from the spinneret. The polytrimethylene terephthalate polyester and the polymer B may be mixed in a solid state with each other before the melting step, or may be melted separately and then the melts may be joined together.
【００１２】本発明者等は、ポリマーＢを含んだ溶融ポ
リトリメチレンテレフタレート系ポリエステルポリマー
流では、断面方向に非対称な冷却効果、すなわち異方冷
却効果が顕著に発現することを見出した。The present inventors have found that in the molten polytrimethylene terephthalate type polyester polymer flow containing the polymer B, a cooling effect asymmetric in the cross-sectional direction, that is, an anisotropic cooling effect is remarkably exhibited.
【００１３】すなわち、ポリマーＢを１〜１０重量％、
より好ましくは４〜８重量％含み、中空形成性吐出孔を
有する紡糸口金から吐出されたポリトリメチレンテレフ
タレート系ポリエステルポリマー流に対し、該ポリマー
流の進行方向にほぼ垂直な方向から冷却風を吹き当てる
と、冷却・固化後のポリトリメチレンテレフタレート系
ポリエステル繊維断面に顕著な構造異方性が生じ、熱処
理後優れた三次元捲縮が発現する。ポリマーＢの混合割
合が１０％を超えると、紡糸時曳糸性が悪くなり断糸が
多発する。ポリマーＢの混合割合が１％未満の場合は、
異方冷却効果が充分に発現しない。また、ポリマーＢの
混合割合が１％未満の場合に、異方冷却効果を充分に発
現させるためにはポリマー溶融温度を極端に下げたり、
冷却風の送風速度を大幅に上げたりする必要があり、紡
糸断糸が多発し安定な紡糸運転が不可能となる。That is, 1 to 10% by weight of the polymer B,
More preferably, the cooling air is blown to the polytrimethylene terephthalate-based polyester polymer flow discharged from a spinneret having hollow-forming discharge holes in an amount of 4 to 8% by weight, from a direction substantially perpendicular to the direction of the polymer flow. When applied, remarkable structural anisotropy occurs in the cross-section of the poly (trimethylene terephthalate) polyester fiber after cooling and solidification, and excellent three-dimensional crimping is developed after heat treatment. When the mixing ratio of the polymer B exceeds 10%, the spinnability during spinning is deteriorated and the yarn breaks frequently. When the mixing ratio of the polymer B is less than 1%,
The anisotropic cooling effect is not sufficiently expressed. Further, when the mixing ratio of the polymer B is less than 1%, the polymer melting temperature may be extremely lowered in order to sufficiently develop the anisotropic cooling effect.
It is necessary to greatly increase the cooling air blowing speed, and many spinning breaks occur, making stable spinning operation impossible.
【００１４】該ポリマー流が異方冷却される時は、その
内部に空隙が存在する、いわゆる中空構造となっていな
ければならない。空隙が存在しない中実構造のポリマー
流では、ポリマーＢを含んでいても異方冷却効果が充分
に発現しない。なお、中空率（紡糸引き取りされた延伸
前のポリトリメチレンテレフタレート系ポリエステル繊
維の断面写真で測定する）が１０〜５０％、より好まし
くは２０〜４０％であるとより顕著な異方冷却効果が発
現する。中空率が５０％を超えると紡糸断糸の発生が多
くなったり、繊維の割れが発生し易い傾向が認められる
ので、好ましくない。なお、ポリマーＢの混合割合が１
％未満の場合には中空率を大きくすることが極めて難し
くなる。When the polymer stream is anisotropically cooled, it must have a so-called hollow structure in which voids exist. In a polymer flow having a solid structure with no voids, the anisotropic cooling effect is not sufficiently exhibited even if the polymer B is contained. In addition, when the hollow ratio (measured by a cross-sectional photograph of the polytrimethylene terephthalate-based polyester fiber which has been spun and drawn before stretching) is 10 to 50%, more preferably 20 to 40%, a more remarkable anisotropic cooling effect is obtained. Express. If the hollow ratio exceeds 50%, the number of spun yarns is increased, and the fiber tends to be easily cracked, which is not preferable. The mixing ratio of polymer B is 1
If it is less than%, it becomes extremely difficult to increase the hollow rate.
【００１５】繊維の断面および中空の形状は円形、三角
等の多角形であっても良いが、円形が紡糸口金の作成上
また運転安定性上最も好ましい。The cross-section and hollow shape of the fiber may be a polygon such as a circle or a triangle, but the circle is the most preferable from the viewpoint of producing the spinneret and the operation stability.
【００１６】異方冷却・固化され、引き取りされた未延
伸ポリトリメチレンテレフタレート系ポリエステル繊維
は適当な繊度の未延伸トウとして引き揃えられる。次い
で、温水等通常の方法で延伸され、弛緩熱処理を施され
ることにより、三次元捲縮が発現する。その後、用途に
応じて２０〜１５０ｍｍの繊維長にカットされポリトリ
メチレンテレフタレート系ポリエステル短繊維となる。The unstretched polytrimethylene terephthalate-based polyester fibers which have been anisotropically cooled and solidified and then collected are aligned as unstretched tows having an appropriate fineness. Then, it is stretched by an ordinary method such as warm water and subjected to a relaxation heat treatment to develop a three-dimensional crimp. Then, it is cut into a fiber length of 20 to 150 mm depending on the application to form polytrimethylene terephthalate-based polyester short fibers.
【００１７】[0017]
【実施例】次に、実施例により本発明を具体的に説明す
る。なお、実施例における各項目は次の方法で測定し
た。EXAMPLES Next, the present invention will be described in detail with reference to examples. Each item in the examples was measured by the following method.
【００１８】１）固有粘度
オルソクロロフェノールを溶媒として、３５℃の温度で
ウベローデ粘度管にて測定した。1) Intrinsic viscosity Using orthochlorophenol as a solvent, the viscosity was measured with an Ubbelohde viscosity tube at a temperature of 35 ° C.
【００１９】２）圧縮嵩
三次元捲縮を表す特性として圧縮嵩を以下の方法で測定
した。短繊維をカードに通して作成されたウェブを２０
ｃｍ四方の広さに切り取り、重ねて重さ４０ｇのサンプ
ル嵩を作成する。該サンプル嵩を温度１８℃、相対湿度
６０％の雰囲気にて２時間放置した後、圧縮試験機にて
１１．８ｋＰａの荷重を１０分間掛け、除重した。次い
で、温度１８℃、相対湿度６０％の雰囲気にて１．５時
間放置した後、０．９８ｋＰａの荷重を掛けた時のサン
プル嵩の高さを測定し、次の計算式によって求めた値を
圧縮嵩とした。
圧縮嵩＝測定値(ｃｍ)×サンプルの負荷面積(ｃｍ2)÷
サンプルの重量(g)
なお、圧縮嵩の値が高いほど三次元捲縮は優れているこ
とを示す。2) Compressed Bulk Compressed bulk was measured by the following method as a characteristic representing three-dimensional crimp. 20 webs made by passing short fibers through a card
The sample is cut into a square having a size of a square cm, and is piled up to form a sample bulk having a weight of 40 g. The sample bulk was left for 2 hours in an atmosphere of a temperature of 18 ° C. and a relative humidity of 60%, and then a load of 11.8 kPa was applied for 10 minutes by a compression tester to remove the weight. Then, after leaving for 1.5 hours in an atmosphere at a temperature of 18 ° C. and a relative humidity of 60%, the height of the sample bulk when a load of 0.98 kPa was applied was measured, and the value calculated by the following calculation formula was calculated. It was a compressed bulk. Compressed bulk = measured value (cm) × sample load area (cm 2 ) ÷
Sample weight (g) The higher the value of the compressed bulk, the better the three-dimensional crimp.
【００２０】３）紡糸断糸
７時間の連続紡糸を行い、その間の断糸回数を記録し
た。3) Spinning breakage Continuous spinning was carried out for 7 hours, and the number of breakages during that period was recorded.
【００２１】４）中空率
紡糸引き取り後の未延伸トウの切断面を写真に撮り、２
０個の断面について中空部と単繊維断面の面積を測定
し、単繊維断面の面積に対する中空部の面積百分率
（％）の平均値を中空率とした。4) Take a photograph of the cut surface of the unstretched tow after the hollow ratio spinning take-up, and 2
The areas of the hollow part and the single fiber cross section were measured for 0 cross sections, and the average value of the area percentage (%) of the hollow part to the area of the single fiber cross section was taken as the hollow ratio.
【００２２】[実施例１]固有粘度０．９５のポリトリメ
チレンテレフタレートチップに、ポリマーＢとして
（株）島津製作所製の「ラクティ＃９０２０」チップ（ポ
リ乳酸、重量平均分子量２０００００、融点１７５℃）
を６重量％均一に混合した混合体を、１４５℃で７時間
乾燥した後、２５０℃で溶融し、図１に示す形状で、表
１に示す寸法の吐出孔を２１０個穿設した紡糸口金より
吐出量４００ｇ／分で吐出し、口金面下２〜１５ｃｍの
位置で２５℃の冷却用空気を１．９ｍ／秒の流速でポリ
マー流の片側から糸条の進行方向に垂直な角度で吹き当
て、１１００ｍ／分の速度で紡糸引き取りし未延伸ポリ
トリメチレンテレフタレート繊維を得た。この未延伸ポ
リトリメチレンテレフタレート繊維の中空率は２９％で
あった。次いで、得られた未延伸繊維を５０万デシテッ
クスのトウに引き揃えた後、第１段延伸温度５５℃、第
２段延伸温度９０℃で２．３５倍に温水延伸した。この
延伸糸を１３５℃で弛緩熱収縮処理を施して、６４ｍｍ
の繊維長にカットし、繊度１２デシテックスの捲縮綿を
得た。製造条件および結果を表１に示す。[Example 1] Polytrimethylene terephthalate chips having an intrinsic viscosity of 0.95 and "Lacty # 9020" chips manufactured by Shimadzu Corporation as polymer B (polylactic acid, weight average molecular weight 200,000, melting point 175 ° C)
6% by weight of the mixture was dried at 145 ° C. for 7 hours, then melted at 250 ° C., and a spinneret with 210 discharge holes having the shape shown in FIG. Discharge at a rate of 400 g / min, and blow cooling air at a temperature of 2 to 15 cm below the spinneret surface at a temperature of 25 ° C. at a flow rate of 1.9 m / sec from one side of the polymer stream at an angle perpendicular to the yarn traveling direction. The unstretched polytrimethylene terephthalate fiber was obtained by spinning and drawing at a speed of 1100 m / min. The hollow ratio of this unstretched polytrimethylene terephthalate fiber was 29%. Then, the obtained unstretched fibers were aligned in a tow of 500,000 decitex, and then hot-water stretched 2.35 times at a first stage stretching temperature of 55 ° C and a second stage stretching temperature of 90 ° C. This stretched yarn is subjected to relaxation heat shrinkage treatment at 135 ° C.
To obtain crimped cotton with a fineness of 12 decitex. The production conditions and results are shown in Table 1.
【００２３】[比較例１]ポリマーＢ（ポリ乳酸ポリマー
「ラクティ＃９０２０」）の混合量を表１に示すように変
更した以外は、実施例１と同様に乾燥、溶融、紡糸およ
び延伸熱処理して、繊度１２デシテックスの捲縮綿を得
た。製造条件および結果を表１に示す。[Comparative Example 1] Polymer B (polylactic acid polymer "Lacty # 9020") was dried, melted, spun and heat-treated in the same manner as in Example 1 except that the mixing amount was changed as shown in Table 1. As a result, crimped cotton having a fineness of 12 decitex was obtained. The production conditions and results are shown in Table 1.
【００２４】[実施例２〜３、及び、比較例２]ポリマー
Ｂ（ポリ乳酸ポリマー「ラクティ＃９０２０」）の混合
量、ポリマー溶融温度、冷却風速度および紡糸口金吐出
孔の寸法とを表１に示すように変更した以外は、実施例
１と同様に乾燥、溶融、紡糸および延伸熱処理して、繊
度１２デシテックスの捲縮綿を得た。製造条件および結
果を表１に示す。[Examples 2 and 3 and Comparative Example 2] Table 1 shows the mixing amount of the polymer B (polylactic acid polymer "Lacty # 9020"), the polymer melting temperature, the cooling air velocity and the size of the spinneret discharge hole. Crimped cotton with a fineness of 12 decitex was obtained by drying, melting, spinning and drawing heat treatment in the same manner as in Example 1 except that the change was made as shown in FIG. The production conditions and results are shown in Table 1.
【００２５】[比較例３]吐出孔径０．３０ｍｍ、ランド
長０．５０ｍｍの中実孔形成用円形吐出孔を２１０個穿
設した紡糸口金を用い、冷却風速度を２．５ｍ／秒とす
る以外は実施例１と同様に乾燥、溶融、紡糸および延伸
熱処理して、繊度１２デシテックスの捲縮綿を得た。製
造条件および結果を表１に示す。なお、この条件で製造
された捲縮綿は捲縮不足のためカードを通過せず、圧縮
嵩測定用のサンプリングは不可であり、本条件では三次
元捲縮はほとんど発現していないと判定した。[Comparative Example 3] A spinneret having 210 circular discharge holes for forming solid holes and a discharge hole diameter of 0.30 mm and a land length of 0.50 mm was used, and the cooling air velocity was 2.5 m / sec. Other than that was dried, melted, spun, and heat-treated for stretching in the same manner as in Example 1 to obtain crimped cotton having a fineness of 12 decitex. The production conditions and results are shown in Table 1. The crimped cotton produced under these conditions did not pass through the card due to lack of crimps, and sampling for measurement of compressed bulk was impossible, and it was judged that three-dimensional crimps were hardly expressed under these conditions. .
【００２６】[0026]
【表１】 [Table 1]
【００２７】[0027]
【発明の効果】本発明によれば、通常のポリマー溶融温
度および冷却風送風条件のもとで、優れた三次元捲縮を
有するポリトリメチレンテレフタレート系ポリエステル
短繊維を安定して製造することが出来る。According to the present invention, polytrimethylene terephthalate polyester short fibers having excellent three-dimensional crimp can be stably produced under ordinary polymer melting temperature and cooling air blowing conditions. I can.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明に用いる紡糸口金の吐出孔形状の一実施
態様を示した模式図。FIG. 1 is a schematic view showing an embodiment of a discharge hole shape of a spinneret used in the present invention.
Ｗ ：吐出孔円弧スリット幅 Ｄ ：吐出孔ピッチ円周直径 W: Discharge hole arc slit width D: Discharge hole pitch circumference diameter
フロントページの続き Ｆターム(参考） 4L035 AA05 AA09 BB40 BB56 BB72 BB81 BB89 BB91 CC07 DD03 DD19 HH01 HH10 4L045 AA05 BA03 BA24 BA36 BA45 BA51 CA01 CB02 CB13 Continued front page F-term (reference) 4L035 AA05 AA09 BB40 BB56 BB72 BB81 BB89 BB91 CC07 DD03 DD19 HH01 HH10 4L045 AA05 BA03 BA24 BA36 BA45 BA51 CA01 CB02 CB13
Claims (2)
エステルにポリ乳酸を主成分とするポリエステルを１〜
１０重量％の割合で混合後溶融あるいは溶融後混合し、
中空形成性吐出孔を有する紡糸口金より吐出し、異方冷
却を施し、紡糸引き取りした後、延伸し、熱処理によっ
て捲縮を発現させるポリトリメチレンテレフタレート系
ポリエステル短繊維の製造方法。1. A polytrimethylene terephthalate-based polyester containing a polyester containing polylactic acid as a main component in an amount of 1 to 1.
10% by weight after mixing and then melting or after melting,
A method for producing a poly (trimethylene terephthalate) polyester short fiber, which is discharged from a spinneret having hollow-forming discharge holes, isotropically cooled, is drawn by spinning, and is stretched to develop crimps by heat treatment.
チレンテレフタレート系ポリエステル繊維の中空率が１
０〜５０％である請求項１記載のポリトリメチレンテレ
フタレート系ポリエステル短繊維の製造方法。2. The hollow ratio of the drawn and drawn polytrimethylene terephthalate polyester fiber before stretching has a hollowness of 1
It is 0 to 50%, The manufacturing method of the poly trimethylene terephthalate type polyester staple fiber of Claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001225647A JP3806320B2 (en) | 2001-07-26 | 2001-07-26 | Method for producing polytrimethylene terephthalate short fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001225647A JP3806320B2 (en) | 2001-07-26 | 2001-07-26 | Method for producing polytrimethylene terephthalate short fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003041435A true JP2003041435A (en) | 2003-02-13 |
| JP3806320B2 JP3806320B2 (en) | 2006-08-09 |
Family
ID=19058605
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001225647A Expired - Fee Related JP3806320B2 (en) | 2001-07-26 | 2001-07-26 | Method for producing polytrimethylene terephthalate short fiber |
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| Country | Link |
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| JP (1) | JP3806320B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007067434A2 (en) | 2005-12-07 | 2007-06-14 | E. I. Du Pont De Nemours And Company | Poly(trimethylene terephthalate)/poly(alpha-hydroxy acid) molded, shaped articles |
| WO2007067435A3 (en) * | 2005-12-07 | 2007-08-16 | Du Pont | Poly(trimethylene terephthalate)/poly(alpha-hydroxy acid) bi-constituent filaments |
| CN103668852A (en) * | 2012-08-30 | 2014-03-26 | 有限会社佐藤化成工业所 | Polyester fiber silver production method and cotton rod production method |
| CN108048924A (en) * | 2017-12-06 | 2018-05-18 | 润益（嘉兴）新材料有限公司 | A kind of acid fiber by polylactic color silk |
-
2001
- 2001-07-26 JP JP2001225647A patent/JP3806320B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007067434A2 (en) | 2005-12-07 | 2007-06-14 | E. I. Du Pont De Nemours And Company | Poly(trimethylene terephthalate)/poly(alpha-hydroxy acid) molded, shaped articles |
| WO2007067434A3 (en) * | 2005-12-07 | 2007-08-02 | Du Pont | Poly(trimethylene terephthalate)/poly(alpha-hydroxy acid) molded, shaped articles |
| WO2007067435A3 (en) * | 2005-12-07 | 2007-08-16 | Du Pont | Poly(trimethylene terephthalate)/poly(alpha-hydroxy acid) bi-constituent filaments |
| JP2009518555A (en) * | 2005-12-07 | 2009-05-07 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | Poly (trimethylene terephthalate) / poly (α-hydroxy acid) bicomponent filament |
| US7666501B2 (en) | 2005-12-07 | 2010-02-23 | E. I. Du Pont De Nemours And Company | Poly(trimethylene terephthalate)/poly(alpha-hydroxy acid) bi-constituent filaments |
| US8066923B2 (en) | 2005-12-07 | 2011-11-29 | E.I. Du Pont De Nemours And Company | Poly(trimethylene terephthalate)/poly(alpha-hydroxy acid) biconstituent filaments |
| CN101321828B (en) * | 2005-12-07 | 2012-07-04 | 纳幕尔杜邦公司 | Poly(trimethylene terephthalate)/poly(alpha-hydroxy acid) bi-constituent filaments |
| CN103668852A (en) * | 2012-08-30 | 2014-03-26 | 有限会社佐藤化成工业所 | Polyester fiber silver production method and cotton rod production method |
| CN108048924A (en) * | 2017-12-06 | 2018-05-18 | 润益（嘉兴）新材料有限公司 | A kind of acid fiber by polylactic color silk |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3806320B2 (en) | 2006-08-09 |
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