JPH11350283A - Drawing and drawn product - Google Patents
Drawing and drawn productInfo
- Publication number
- JPH11350283A JPH11350283A JP15424298A JP15424298A JPH11350283A JP H11350283 A JPH11350283 A JP H11350283A JP 15424298 A JP15424298 A JP 15424298A JP 15424298 A JP15424298 A JP 15424298A JP H11350283 A JPH11350283 A JP H11350283A
- Authority
- JP
- Japan
- Prior art keywords
- stretched
- fiber
- stretching
- pressurized water
- drawn
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
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】本発明は延伸方法,延伸物お
よび前記の延伸物の加工品に係り、特に、結晶性高分子
製の延伸物を得るうえで好適な延伸方法および当該方法
によって製造された延伸物、ならびに、前記の延伸物の
1つであるポリプロピレン繊維を材料繊維とするポリプ
ロピレン繊維加工品に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stretching method, a stretched product, and a processed product of the stretched product, and more particularly to a stretching method suitable for obtaining a stretched product made of a crystalline polymer and a process for producing the same. The present invention relates to a drawn product, and a processed polypropylene fiber product using a polypropylene fiber as one of the drawn products as a material fiber.
【0002】[0002]
【従来の技術】合成繊維,樹脂フィルム,樹脂シート等
の結晶性高分子製品の物性は、その内部構造(結晶性高
分子の微細構造)の影響を強く受け、当該内部構造は延
伸や熱処理によって比較的容易に変化する。そして、未
延伸物よりも延伸物の方が実用上好ましい物性を有して
いることが多く、より高倍率で延伸した方が強度,ヤン
グ率等の物性に優れた延伸物が得られる。このため、結
晶性高分子製品、特に合成繊維,樹脂フィルム,樹脂シ
ート等を得る場合には、通常、延伸処理が施される。ま
た、延伸処理後に必要に応じて熱処理が施される。2. Description of the Related Art The physical properties of crystalline polymer products such as synthetic fibers, resin films, and resin sheets are strongly affected by their internal structures (microstructures of crystalline polymers). It changes relatively easily. In addition, a stretched product often has practically more preferable physical properties than an unstretched product, and a stretched product having higher physical properties such as strength and Young's modulus can be obtained by stretching at a higher magnification. For this reason, in order to obtain a crystalline polymer product, in particular, a synthetic fiber, a resin film, a resin sheet, or the like, a stretching treatment is usually performed. After the stretching, heat treatment is performed as necessary.
【0003】結晶性高分子製品を得る際の延伸方法とし
ては種々の方法が知られているが、例えば合成繊維を得
る際には、金属加熱ロールや金属加熱板等を用いての接
触加熱延伸、あるいは温水,常圧〜2kg/cm2 程度
の水蒸気,遠赤外線等を用いての非接触加熱延伸等の延
伸方法が適用されている。[0003] Various methods are known as a drawing method for obtaining a crystalline polymer product. For example, when obtaining a synthetic fiber, a contact heating drawing using a metal heating roll, a metal heating plate or the like is used. Alternatively, a stretching method such as non-contact heating stretching using hot water, water vapor at normal pressure to about 2 kg / cm 2 , far infrared rays or the like is applied.
【0004】ところで、結晶性高分子の微細構造の変化
は延伸条件に大きく左右され、その結果として結晶性高
分子製品の物性もまた延伸条件に大きく左右されるわけ
であるが、無理に延伸しようとすると延伸切れ等の不具
合が生じる。例えば、ポリプロピレン(以下「PP」と
略記する。)繊維では、未延伸糸を樹脂(PP)の融点
未満のなるべく高い温度下、低変形速度で高倍率に延伸
する程その繊維強度が向上するが、高変形速度で高倍率
に延伸しようとすると容易に延伸切れが生じる。このた
め、工業的(商業的)に生産し得るPP繊維の繊維強
度、すなわち、概ね50m/分以上の速度で生産し得る
PP繊維の繊維強度は10g/d程度である(例えば特
許第2537313号公報参照)。[0004] The change in the microstructure of the crystalline polymer is greatly affected by the stretching conditions, and as a result, the physical properties of the crystalline polymer product are also greatly affected by the stretching conditions. In this case, drawbacks such as breaking of stretching occur. For example, in the case of polypropylene (hereinafter abbreviated as "PP") fiber, the more the unstretched yarn is stretched at a high temperature below the melting point of the resin (PP) at a low deformation rate and high magnification, the more the fiber strength is improved. When the film is stretched at a high deformation rate at a high deformation rate, the stretch breakage easily occurs. For this reason, the fiber strength of PP fibers that can be produced industrially (commercially), that is, the fiber strength of PP fibers that can be produced at a speed of about 50 m / min or more is about 10 g / d (for example, Japanese Patent No. 2537313). Gazette).
【0005】ただし、生産性を無視して極めて低い変形
速度の下に延伸すればより繊維強度の高いPP繊維を得
ることができる。例えば『高分子論文集』(Vol.54, N
o.5,May, 1997)の第351〜358頁には、連続ゾー
ン延伸法によって製造された繊維強度13.4g/d程
度のPP繊維が記載されているが、当該PP繊維を得る
際の連続ゾーン延伸工程における繊維の送り出し速度は
僅かに0.5m/分である。However, if the drawing is performed at an extremely low deformation rate ignoring the productivity, a PP fiber having higher fiber strength can be obtained. For example, "Polymer Papers" (Vol.54, N
o.5, May, 1997), pages 351 to 358, describe PP fibers having a fiber strength of about 13.4 g / d produced by the continuous zone drawing method. The feed rate of the fibers in the continuous zone drawing step is only 0.5 m / min.
【0006】[0006]
【発明が解決しようとする課題】上述したように、結晶
性高分子の微細構造の変化は延伸条件に大きく左右さ
れ、その結果として結晶性高分子製延伸物の物性もまた
延伸条件に大きく左右されるわけであるが、無理に延伸
しようとすると延伸切れ等の不具合が生じる。このた
め、従来の延伸方法を利用して工業的に得ることができ
る結晶性高分子製延伸物の物性値には、当該結晶性高分
子製延伸物の材質に応じた上限がある。しかしながら、
結晶性高分子製品は種々の分野において利用されてお
り、その需要の増加に伴って当該結晶性高分子製品につ
いては物性の向上が常に求められている。As described above, the change in the microstructure of the crystalline polymer largely depends on the stretching conditions, and as a result, the physical properties of the crystalline polymer stretched product also greatly depend on the stretching conditions. However, if the film is forcibly stretched, a drawback such as breakage of the film occurs. For this reason, there is an upper limit to the physical property value of a crystalline polymer stretched product that can be obtained industrially using a conventional stretching method according to the material of the crystalline polymer stretched product. However,
Crystalline polymer products are used in various fields, and with the increase in demand, there is always a demand for improvement in physical properties of the crystalline polymer products.
【0007】本発明の目的は、より好ましい物性を有し
ている延伸物を工業的に得ることが容易な延伸方法、お
よび、より好ましい物性を有しているものを工業的に得
ることが容易な延伸物、ならびに、前記の延伸物の1つ
であるポリプロピレン繊維を材料繊維とするポリプロピ
レン繊維加工品を提供することにある。[0007] An object of the present invention is to provide a stretching method in which a stretched product having more preferable physical properties can be industrially easily obtained, and a process in which a stretched product having more preferable physical properties can be obtained industrially. Another object of the present invention is to provide a drawn product and a processed polypropylene fiber product using a polypropylene fiber which is one of the drawn products as a material fiber.
【0008】[0008]
【課題を解決するための手段】上記の目的を達成する本
発明の延伸方法は、被延伸物を内部に送り込むための被
延伸物導入孔と内部に送り込まれた前記の被延伸物が延
伸されたことによって生じた延伸物を引き出すための延
伸物引き出し孔とを有する気密性の容器内に、延伸媒体
として絶対圧が2.0kg/cm2 以上の加圧飽和水蒸
気を充填して延伸槽とし、該延伸槽における前記の被延
伸物導入孔および前記の延伸物引き出し孔から加圧飽和
水蒸気が漏出することをそれぞれ加圧水を利用して防止
するとともに、前記の被延伸物導入孔から加圧飽和水蒸
気が漏出することを防止している加圧水中に被延伸物を
導き、被延伸物の表面に水分が付着した後、該被延伸物
を前記の被延伸物導入孔から延伸槽内に導いて延伸し、
その後、前記の延伸物引き出し孔から引き出された延伸
物を、前記の延伸物引き出し孔から加圧飽和水蒸気が漏
出することを防止している加圧水中に導いて冷却する、
ことを特徴とするものである。According to the present invention, there is provided a stretching method for achieving the above object, in which a stretched object introduction hole for feeding a stretched object into the inside and the stretched object fed into the inside are stretched. A stretched tank is filled with pressurized saturated steam having an absolute pressure of 2.0 kg / cm 2 or more as a stretching medium in a hermetically sealed container having a stretched product drawing hole for drawing out a stretched product generated by the stretching. The pressurized water is used to prevent the pressurized water vapor from leaking out of the drawing object introduction hole and the drawing object drawing hole in the drawing tank, and pressurized saturation from the drawing object introduction hole. The object to be stretched is introduced into the pressurized water that prevents the water vapor from leaking out, and after the water adheres to the surface of the object to be stretched, the object to be stretched is guided into the stretching tank from the object introduction hole. Stretch,
Thereafter, the stretched product drawn out from the stretched product drawing hole is cooled by being introduced into pressurized water that prevents pressurized saturated steam from leaking from the drawn product drawing hole,
It is characterized by the following.
【0009】また、上記の目的を達成する本発明の延伸
物は、被延伸物を上記本発明の方法によって延伸して得
たものであることを特徴とするものである。Further, the stretched product of the present invention that achieves the above object is characterized by being obtained by stretching an object to be stretched by the method of the present invention.
【0010】そして、上記の目的を達成する本発明のポ
リプロピレン繊維加工品は、上記本発明の延伸物の1で
あるポリプロピレン繊維を材料繊維とし、フィラメン
ト,ショートカットチョップおよびステープルファイバ
ーのいずれかの繊維形態を有することを特徴とするもの
である。[0010] The processed polypropylene fiber of the present invention, which achieves the above object, has a polypropylene fiber which is one of the above-mentioned drawn products of the present invention as a material fiber, and has a fiber form of any of filament, shortcut chop and staple fiber. It is characterized by having.
【0011】[0011]
【発明の実施の形態】以下、本発明の実施の形態につい
て詳細に説明する。まず、本発明の延伸方法について説
明する。本発明者らは、結晶性高分子をより高速で高度
に変形させるための方法について鋭意研究した結果、結
晶性高分子製の被延伸物の表面に水分を付着させ、高圧
の加圧飽和水蒸気を延伸媒体とする延伸槽を用いて当該
被延伸物を延伸することにより、従来の延伸方法による
場合よりも被延伸物を大きく変形させることが可能にな
り、また、被延伸物の変形量が同じである場合には従来
の延伸方法によるものよりも実用上より好ましい物性を
有する延伸物が得られることを見出し、本発明を完成す
るに至った。Embodiments of the present invention will be described below in detail. First, the stretching method of the present invention will be described. The present inventors have conducted intensive studies on a method for deforming a crystalline polymer at a higher speed and a higher degree. As a result, moisture was attached to the surface of an object to be stretched made of a crystalline polymer, and high-pressure pressurized saturated steam was applied. By stretching the object to be stretched using a stretching tank using as a stretching medium, the object to be stretched can be deformed more than in the case of the conventional stretching method, and the amount of deformation of the object to be stretched is reduced. When they are the same, it has been found that a stretched product having practically more preferable physical properties than that obtained by the conventional stretching method can be obtained, and the present invention has been completed.
【0012】上記の知見に基づく本発明の延伸方法で
は、前述したように特定の延伸槽を利用し、この延伸槽
は絶対圧が2.0kg/cm2 以上の加圧飽和水蒸気を
延伸媒体として用いたものである。したがって、当該延
伸槽の容器は前記の加圧飽和水蒸気が漏出しないように
気密性を高めたものである必要があるが、その一方で、
前記の容器には被延伸物を当該容器内(延伸槽内)に導
入するための被延伸物導入孔および延伸物を容器内(延
伸槽内)から引き出すための延伸物引き出し孔を設ける
必要がある。このため、前記の被延伸物導入孔および延
伸物引き出し孔からは必然的に加圧飽和水蒸気が漏出す
ることになる。In the stretching method of the present invention based on the above findings, a specific stretching tank is used as described above, and the stretching tank uses pressurized saturated steam having an absolute pressure of 2.0 kg / cm 2 or more as a stretching medium. It was used. Therefore, it is necessary that the container of the stretching tank has a high airtightness so that the pressurized saturated steam does not leak, but on the other hand,
The above-mentioned container needs to be provided with an object introduction hole for introducing the object to be drawn into the container (in the drawing tank) and a drawn-out hole for drawing out the drawn object from the container (in the drawing tank). is there. For this reason, pressurized saturated steam will inevitably leak from the above-mentioned object introduction hole and the object drawing hole.
【0013】しかしながら、延伸槽内の加圧飽和水蒸気
の絶対圧は所望値に維持する必要がある。このため、当
該延伸槽には前記の被延伸物導入孔および延伸物引き出
し孔から加圧飽和水蒸気が漏出することを防止するため
の漏出防止手段を設けることが好ましい。However, it is necessary to maintain the absolute pressure of the pressurized saturated steam in the stretching tank at a desired value. For this reason, it is preferable that the stretching tank is provided with a leakage preventing means for preventing the pressurized saturated steam from leaking from the above-mentioned object introduction hole and the object drawing hole.
【0014】従来より、加圧蒸気の漏出防止手段として
はラビリンスシール方式が知られている。これは、フィ
ンを用いて狭い流路を多段に形成し、当該流路を延伸媒
体(加圧蒸気)が流通する際に生じる圧力損失を利用し
て延伸槽内の延伸媒体の圧力を保つ(延伸媒体の漏出を
防止する)手法であるが、被延伸物と構造上不可欠なフ
ィンとの接触機会が多数あることから、被延伸物とフィ
ンとが接触してトラブルを起こしやすいという難点を有
している。さらに、理論上、ラビリンス内で被延伸物が
昇温して軟化し始める、すなわち、延伸槽に入る前に被
延伸物が昇温して軟化し始めるため、被延伸物とフィン
とが接触した場合のトラブル発生頻度が増大しやすい。
同様に、延伸直後においても延伸物が直ちには冷却され
ないため、延伸物とフィンとの接触によるトラブルが多
発しやすい。また、延伸槽内の延伸媒体の圧力を十分に
保つためには「狭い流路」の数(フィンの数)を増やさ
なければならないことから、前記の接触機会が更に増え
ることに加えて装置が大型化するという難点も有してい
る。Hitherto, a labyrinth seal method has been known as a means for preventing leakage of pressurized steam. In this method, a narrow flow path is formed in multiple stages using fins, and the pressure of the drawing medium in the drawing tank is maintained by utilizing the pressure loss generated when the drawing medium (pressurized steam) flows through the flow path ( This is a method of preventing the leakage of the stretching medium), but since there are many opportunities for contact between the object to be stretched and the fins which are indispensable in structure, there is a disadvantage that the object to be stretched and the fins are likely to come into contact with each other and cause trouble. doing. Furthermore, in theory, the object to be stretched rises in the labyrinth and starts to soften, that is, the object to be stretched is heated to soften before entering the stretching tank, so that the object to be stretched and the fins come into contact with each other. In such cases, the frequency of occurrence of troubles tends to increase.
Similarly, since the stretched product is not immediately cooled immediately after stretching, troubles due to contact between the stretched product and the fins are likely to occur frequently. Further, in order to sufficiently maintain the pressure of the stretching medium in the stretching tank, the number of “narrow channels” (the number of fins) must be increased. It also has the disadvantage of being larger.
【0015】このため本発明の方法で用いる延伸槽にお
いては、加圧水を利用した新たな漏出防止手段によって
被延伸物導入孔からの加圧飽和水蒸気の漏出を防止す
る。当該加圧水を利用した漏出防止手段を用いれば、前
記の加圧水中に被延伸物を導くことが可能になるので、
これにより、(a) 延伸槽に入る前に被延伸物が昇温して
軟化し始めるのを抑制すること、(b) 被延伸物と漏出防
止手段との接触機会を低減させること、および、(c) 被
延伸物の表面に水分を付着させること、をそれぞれ容易
に図ることができる。このとき、被延伸物が水中を通過
するのに要する時間は概ね0.1秒以上とすることが好
ましい。For this reason, in the stretching tank used in the method of the present invention, leakage of pressurized saturated steam from the introduction port of the object to be stretched is prevented by a new leak preventing means utilizing pressurized water. By using the leak prevention means using the pressurized water, it is possible to guide the object to be stretched into the pressurized water,
Thereby, (a) suppressing the temperature of the object to be stretched and starting to soften before entering the stretching tank, (b) reducing the chance of contact between the object to be stretched and the leakage prevention means, and (c) Adhering moisture to the surface of the object to be stretched can be easily achieved. At this time, the time required for the object to be stretched to pass through the water is preferably about 0.1 second or more.
【0016】また、本発明の方法で用いる延伸槽におい
ては、延伸物引き出し孔からの加圧飽和水蒸気の漏出に
ついても、加圧水を利用した新たな漏出防止手段によっ
て防止する。この漏出防止手段を用いれば、延伸直後に
当該漏出防止手段中(加圧水中)に延伸物を導いて速や
かに冷却することが可能になるので、延伸物と漏出防止
手段との接触によるトラブルを容易に低減させることが
できる。このとき、延伸物が水中を通過するのに要する
時間は概ね0.2秒以上とすることが好ましい。さら
に、加圧水を利用した上記の漏出防止手段(被延伸物導
入孔側および延伸物引き出し孔側の計2つ)を用いれ
ば、絶対圧が高い加圧飽和水蒸気に対しても当該漏出防
止手段の小型化を容易に図ることができる。In the stretching tank used in the method of the present invention, the leakage of pressurized saturated steam from the drawn-out hole is also prevented by a new leak preventing means using pressurized water. If this leakage prevention means is used, it is possible to guide the stretched material into the leakage prevention means (pressurized water) immediately after stretching and to quickly cool the stretched material, so that troubles caused by contact between the stretched material and the leakage prevention means can be easily achieved. Can be reduced. At this time, it is preferable that the time required for the stretched product to pass through water is approximately 0.2 seconds or more. Furthermore, if the above-mentioned leakage prevention means using the pressurized water (two in total, on the side of the object to be stretched introduction hole and the side of the stretched object withdrawal hole) are used, the leakage prevention means can be used even for pressurized saturated steam having a high absolute pressure. Miniaturization can be easily achieved.
【0017】上述した延伸槽を利用する本発明の方法に
よって延伸しようとする被延伸物は、目的とする製品を
得るにあたって延伸することが望まれる結晶性高分子製
のものであればよく、その形態の具体例としては、合成
繊維用の未延伸糸,未延伸フィルム,未延伸シート,梱
包用バンドの未延伸物,梱包用テープの未延伸物等が挙
げられる。The object to be stretched by the method of the present invention utilizing the above-described stretching tank may be any one made of a crystalline polymer which is desired to be stretched in order to obtain a desired product. Specific examples of the form include unstretched yarn, unstretched film, unstretched sheet, unstretched packing band, unstretched packing tape, and the like for synthetic fibers.
【0018】また、当該被延伸物の材質は結晶性高分子
であれば特に制限されず、その具体例としては、PP,
ポリエチレン,ポリ4−メチルペンテン−1,ポリオキ
シメチレン等のホモポリマーや、PPとαオレフィン
(例えばエチレン,ブテン−1等)との共重合体,ポリ
エチレンとブテン−1との共重合体等の共重合体が挙げ
られる。The material of the object to be stretched is not particularly limited as long as it is a crystalline polymer, and specific examples thereof include PP,
Homopolymers such as polyethylene, poly-4-methylpentene-1 and polyoxymethylene, copolymers of PP and α-olefins (eg, ethylene, butene-1 and the like), and copolymers of polyethylene and butene-1 And copolymers.
【0019】加圧飽和水蒸気中での被延伸物の延伸は、
被延伸物を単品毎に延伸するものであってもよいし、例
えば被延伸物が合成繊維用の未延伸糸である場合には所
望本数の未延伸糸を集めて繊維束としたものを延伸する
ものであってもよい。また、延伸倍率は、被延伸物の材
質,使用する加圧飽和水蒸気の温度および絶対圧,目的
とする延伸物に求められる物性,目的とする延伸物の用
途等に応じて適宜選択可能である。The stretching of the object to be stretched in the pressurized saturated steam is performed as follows.
The object to be drawn may be drawn for each single article, or, for example, when the object to be drawn is an undrawn yarn for synthetic fiber, a desired number of undrawn yarns are collected to form a fiber bundle and drawn. May be used. The stretching ratio can be appropriately selected according to the material of the object to be stretched, the temperature and the absolute pressure of the pressurized saturated steam to be used, the physical properties required for the intended stretched product, the intended use of the stretched product, and the like. .
【0020】ただし、加圧飽和水蒸気の絶対圧について
は前記のように2.0kg/cm2(この加圧飽和水蒸
気の温度は120℃である。)以上とすることが好まし
い。絶対圧が2.0kg/cm2 未満の加圧飽和水蒸気
は温度が概ね120℃未満と低いので、このような加圧
飽和水蒸気を延伸媒体として用いた場合には高倍率延伸
を行うことが困難になり、実用上より好ましい物性を有
している延伸物を工業的に生産することが困難になる。
生産速度を低下させてもよいのであれば、絶対圧が2.
0kg/cm2 未満の加圧飽和水蒸気を用いることも可
能である。However, the absolute pressure of the pressurized saturated steam is preferably at least 2.0 kg / cm 2 (the temperature of the pressurized saturated steam is 120 ° C.) as described above. Since pressurized saturated steam having an absolute pressure of less than 2.0 kg / cm 2 has a low temperature of generally less than 120 ° C., it is difficult to perform high-magnification stretching when such pressurized saturated steam is used as a stretching medium. , And it becomes difficult to industrially produce a stretched material having practically more preferable physical properties.
If the production rate can be reduced, the absolute pressure should be 2.
It is also possible to use pressurized saturated steam of less than 0 kg / cm 2 .
【0021】加圧飽和水蒸気の温度および絶対圧は、被
延伸物が軟化しない範囲内でできるだけ高温,高圧にす
ることが基本的に好ましいが、加圧飽和水蒸気の温度が
高ければ高い程その絶対圧も高くなり、これに伴って当
該加圧飽和水蒸気を延伸媒体とする延伸槽の設計が困難
になる。したがって、使用する加圧飽和水蒸気の温度お
よび絶対圧は、被延伸物の材質,延伸物の生産性,延伸
装置の製造コスト等を勘案して選定することが好まし
い。It is basically preferable that the temperature and the absolute pressure of the pressurized saturated steam be as high as possible and high pressure as long as the object to be stretched is not softened. The pressure is also increased, and accordingly, it becomes difficult to design a stretching tank using the pressurized saturated steam as a stretching medium. Therefore, it is preferable that the temperature and the absolute pressure of the pressurized saturated steam to be used are selected in consideration of the material of the object to be stretched, the productivity of the object to be stretched, the manufacturing cost of the stretching apparatus, and the like.
【0022】例えば被延伸物がPPホモポリマー製であ
る場合には、加圧飽和水蒸気の絶対圧を2.0kg/c
m2 (温度は120℃)以上3.0kg/cm2 (温度
は133℃)未満とするよりも、3.0kg/cm2
(温度は133℃)〜5.0kg/cm2 (温度は15
1℃)とする方が好ましく、3.5kg/cm2 (温度
は139℃)〜4.5kg/cm2 (温度は148℃)
とすることがより好ましい。For example, when the object to be stretched is made of PP homopolymer, the absolute pressure of pressurized saturated steam is set to 2.0 kg / c.
m 2 (temperature is 120 ° C.) or more and less than 3.0 kg / cm 2 (temperature is 133 ° C.) rather than 3.0 kg / cm 2
(Temperature is 133 ° C.) to 5.0 kg / cm 2 (temperature is 15 kg / cm 2 )
1 ° C.), preferably 3.5 kg / cm 2 (temperature is 139 ° C.) to 4.5 kg / cm 2 (temperature is 148 ° C.)
Is more preferable.
【0023】なお、前記の加圧飽和水蒸気の温度および
絶対圧があまりにも高いと被延伸物が軟化し、延伸して
も分子鎖の配向が進行せずにむしろ緩和による物性低下
を生じるようになることから、より好ましい物性を有し
ている延伸物を得ることが困難になる。If the temperature and the absolute pressure of the above-mentioned pressurized saturated steam are too high, the object to be stretched is softened, so that the orientation of the molecular chains does not progress even after the stretching, and the physical properties are reduced by relaxation. Therefore, it is difficult to obtain a stretched product having more preferable physical properties.
【0024】本発明の方法では、表面に水分が付着した
状態の被延伸物を加圧飽和水蒸気中で延伸するので、延
伸時の被延伸物の表面には当然のことながら前記の水分
(以下、この水分を「持ち込み水分」という。)が存在
している。また、水蒸気中の被延伸物表面での熱交換に
よって、当該被延伸物の表面には結露が生じる。そし
て、これらの水分(前記の持ち込み水分および前記の結
露による水分)が被延伸物の表面に存在している状態下
で当該被延伸物を延伸するので、ドラフト変形によって
内部発熱が生じても被延伸物の表面の温度が加圧飽和水
蒸気の温度より高温になることが抑制され、被延伸物の
表面が溶融状態になりにくい。In the method of the present invention, the object to be stretched with moisture adhered to the surface is stretched in pressurized saturated steam. This moisture is referred to as "carry-in moisture."). In addition, dew condensation occurs on the surface of the object to be stretched due to heat exchange on the surface of the object to be stretched in steam. The object to be stretched is stretched in a state where the moisture (the moisture brought in and the moisture caused by the condensation) is present on the surface of the object to be stretched. It is suppressed that the temperature of the surface of the stretched object becomes higher than the temperature of the pressurized saturated steam, and the surface of the stretched object is unlikely to be in a molten state.
【0025】このため、従来の延伸方法による場合より
も被延伸物を大きく変形させることが可能になり、これ
によって従来よりもより好ましい物性を有している延伸
物を得ることが可能になる。さらに、被延伸物を従来と
同量変形させた場合でも、より好ましい物性を有してい
る延伸物を得ることが可能になる。そして、上記のよう
な高温・高圧の加圧飽和水蒸気中で延伸を行うので、被
延伸物内部の温度を短時間のうちに所望温度にまで昇温
させることが可能になり、その結果として、目的とする
延伸物を工業的な生産速度の下に容易に得ることが可能
になる。For this reason, it is possible to deform the object to be stretched to a greater extent than in the case of the conventional stretching method, whereby it is possible to obtain a stretched object having more preferable physical properties than in the past. Further, even when the object to be stretched is deformed by the same amount as before, it is possible to obtain a stretched object having more preferable physical properties. Then, since the stretching is performed in the high-temperature and high-pressure pressurized saturated steam as described above, it is possible to raise the temperature inside the object to be stretched to the desired temperature in a short time, and as a result, The desired stretched product can be easily obtained at an industrial production rate.
【0026】本発明の方法によって被延伸物を延伸した
場合に、当該被延伸物を従来の延伸方法によるよりも大
きく変形させることが可能になる理由、および、被延伸
物の変形量が従来と同量であってもより好ましい物性を
有している延伸物が得られる理由は定かではないが、次
の差異に原因があるものと推察される。When the object to be stretched is stretched by the method of the present invention, the object to be stretched can be deformed to a greater extent than by the conventional stretching method. Although the reason why a stretched product having more preferable physical properties can be obtained even when the amount is the same is not clear, it is presumed that the following difference is caused.
【0027】すなわち、本発明の方法では被延伸物は延
伸槽の入口まで水によって冷却されており、かつ、当該
被延伸物は表面に水分(前記の持ち込み水分および前記
の結露による水分)が付着した状態下において高温・高
圧の加圧飽和水蒸気中で延伸され、延伸物は延伸後に加
圧水中に導かれ、速やかに冷却されるのに対し、金属加
熱ロールや金属加熱板等を用いた従来の接触加熱延伸、
あるいは温水,常圧〜2kg/cm2 程度の水蒸気,遠
赤外線等を用いた従来の非接触加熱延伸等では、(1) 被
延伸物の表面に水分が存在しない状態下で当該被延伸物
を延伸する(接触加熱延伸や遠赤外線を用いた非接触加
熱延伸の場合)、(2) 延伸時に被延伸物の周囲に水分が
存在しているが、延伸媒体が高温・高圧ではない(温水
を用いた非接触加熱延伸の場合)、(3) 延伸槽に入る前
に結露によって被延伸物の表面に水分が不可避的に付着
することがあるが、後述する本願発明における作用・効
果を得るには少なすぎる(常圧〜2kg/cm2 程度の
水蒸気を用いた非接触加熱延伸の場合)、(4) 延伸前に
被延伸物が昇温,軟化してその形状保持が不安定な状態
下で当該被延伸物が装置の一部と接触するか、延伸物が
十分に冷却されずにその形状保持が不安定な状態下で当
該延伸物が装置の一部と接触する(従来の全ての延伸方
法)、という差異に原因があるものと推察される。That is, in the method of the present invention, the object to be stretched is cooled by water to the inlet of the stretching tank, and the surface of the object to be stretched has moisture (the above-mentioned moisture brought in and the moisture due to the above-mentioned dew condensation) adhered to the surface. Stretched in high-temperature, high-pressure pressurized saturated steam under stretched conditions, and the stretched product is guided into pressurized water after stretching and cooled quickly, whereas conventional stretches using metal heating rolls or metal heating plates are used. Contact heating stretching,
Alternatively, in conventional non-contact heating stretching using hot water, water vapor at normal pressure to about 2 kg / cm 2 , far infrared rays, or the like, (1) the stretched object is stretched in a state where moisture is not present on the surface of the stretched object. Stretching (in the case of contact heating stretching or non-contact heating stretching using far-infrared rays), (2) moisture is present around the object to be stretched at the time of stretching, but the stretching medium is not high temperature and high pressure ( (3) In the case of non-contact heating stretching used), (3) moisture may inevitably adhere to the surface of the object to be stretched due to dew condensation before entering the stretching tank. Is too small (in the case of non-contact heating stretching using water vapor at normal pressure to about 2 kg / cm 2 ). (4) Under the state where the object to be stretched is heated and softened before stretching and the shape retention is unstable. The stretched object comes into contact with a part of the device, or the stretched material is not sufficiently cooled. The stretching was Jo held under unstable state is assumed that there is a cause (all stretching methods conventional), the difference that a part to contact the device.
【0028】本発明の方法では、前述した持ち込み水分
および結露によって表面に水分が存在している状態の被
延伸物を高温・高圧の加圧飽和水蒸気中で延伸するの
で、被延伸物表面での温度上昇が防止されて当該表面の
温度が加圧飽和水蒸気の温度より高温になるということ
が従来の延伸方法におけるよりも抑制される一方で、被
延伸物の内部では変形発熱が生じることとなる。その結
果、被延伸物の内部において従来とは異なる何らかの構
造変化が進行して、従来の延伸方法によるよりも大きく
変形させることが可能になるとともに、被延伸物の変形
量が従来と同量であってもより好ましい物性を有してい
る延伸物が得られるものと推察される。延伸時に従来と
は異なる構造変化が進行するとの推察は、本発明の方法
によって例えばPP繊維を得た場合に、延伸の後期にお
いて重量デニールが低下する一方で繊維外径の変化が非
常に小さくなるという現象が認められることからも支持
される。In the method of the present invention, the object to be stretched in a state in which water is present on the surface due to the above-mentioned brought-in moisture and dew condensation is stretched in high-temperature, high-pressure, pressurized saturated steam. While the temperature rise is prevented and the temperature of the surface becomes higher than the temperature of the pressurized saturated steam is suppressed as compared with the conventional stretching method, deformation heat is generated inside the object to be stretched. . As a result, some structural change different from the conventional one progresses inside the object to be stretched, and it becomes possible to deform more greatly than by the conventional stretching method, and the amount of deformation of the object to be stretched is the same as the conventional one. It is presumed that a stretched product having more preferable physical properties can be obtained. It is presumed that a structural change different from the conventional one progresses during drawing, for example, when a PP fiber is obtained by the method of the present invention, the change in fiber outer diameter becomes very small while the weight denier decreases in the latter stage of drawing. It is also supported by the fact that this phenomenon is observed.
【0029】前述した利点を有する本発明の方法を実施
するためには、被延伸物の表面に水分を付着させるため
の水分付着手段と、特定の加圧飽和水蒸気を延伸媒体と
して用いた延伸槽と、当該延伸槽から加圧飽和水蒸気が
漏出することを防止するための漏出防止手段とを備えた
延伸装置が必要となる。当該延伸装置の構造は特に限定
されるものではないが、前述したように漏出防止手段と
して加圧水を利用したものを用いれば、当該漏出防止手
段に前記の水分付着手段を兼ねさせること等が可能にな
るので好適である。In order to carry out the method of the present invention having the above-mentioned advantages, a water-adhering means for adhering water to the surface of the object to be drawn, and a drawing tank using a specific pressurized saturated steam as a drawing medium And a stretching device provided with a leakage preventing means for preventing the pressurized saturated steam from leaking from the stretching tank. Although the structure of the stretching device is not particularly limited, if a device using pressurized water is used as the leakage preventing device as described above, the leakage preventing device can also serve as the moisture attachment device. Is preferred.
【0030】上記の延伸装置のうちで一軸延伸用のもの
の具体例としては、例えば以下の構造のものが挙げられ
る。すなわち、被延伸物を内部に送り込むための被延伸
物導入孔および内部に送り込まれた前記の被延伸物が延
伸されたことによって生じた延伸物を引き出すための延
伸物引き出し孔を有する気密性の容器内に延伸媒体とし
ての加圧飽和水蒸気が充填されている延伸槽部と、当該
延伸槽部における前記の被延伸物導入孔側に密接配置さ
れている第1の加圧水槽部と、前記の延伸槽部における
延伸物引き出し孔側に密接配置されている第2の加圧水
槽部と、前記第1の加圧水槽部の外側から当該第1の加
圧水槽部内,前記の被延伸物導入孔,前記の延伸槽部
内,前記の延伸物引き出し孔および前記第2の加圧水槽
部内を経由して前記第2の加圧水槽の外へ被延伸物乃至
は延伸物を導くことができるように前記第1の加圧水槽
部および前記第2の加圧水槽部それぞれに形成されてい
る透孔と、前記第1の加圧水槽部内に被延伸物を送り込
むための被延伸物送出手段と、当該被延伸物送出手段に
よる被延伸物の送り込み速度よりも高速で前記第2の加
圧水槽部から延伸物を引き出すための延伸物引き出し手
段とを有している延伸装置が挙げられる。Specific examples of the above-mentioned stretching apparatus for uniaxial stretching include those having the following structures. That is, an airtightness having a stretched object introduction hole for feeding the stretched object into the inside and a stretched product drawing hole for extracting a stretched material generated by stretching the stretched object sent into the inside. A stretching tank section filled with pressurized saturated steam as a stretching medium in a container, a first pressurized water tank section which is closely arranged on the stretched object introduction hole side of the stretching tank section, A second pressurized water tank portion closely arranged on the stretched product drawing hole side of the stretched tank portion, and the inside of the first pressurized water tank portion from outside the first pressurized water tank portion, the object to be stretched introduction hole, The first object to be stretched or the first object so as to be able to be guided to the outside of the second pressurized water tank through the inside of the stretch tank portion, the above-mentioned drawn product drawing hole and the inside of the second pressurized water tank portion. Pressurized water tank and the second pressurization A through-hole formed in each of the tank portions, a stretched object sending means for feeding the stretched object into the first pressurized water tank portion, and a speed higher than the feeding speed of the stretched object by the stretched object sending means. And a drawing device for drawing a drawn product from the second pressurized water tank section.
【0031】上記の延伸槽部は、加圧飽和水蒸気を延伸
媒体とする従来の延伸槽と同様に、所望の絶対圧(2.
0kg/cm2 以上)を有する加圧飽和水蒸気を延伸媒
体として使用し得るだけの気密性および強度を有し、か
つ、所望の大きさ(長さ)を確保できるものであればよ
い。また、上記第1の加圧水槽部は、延伸槽部に形成さ
れている被延伸物導入孔から加圧飽和水蒸気が延伸槽部
の外に漏出するのを防止するためのものであると同時
に、被延伸物を加圧水中に導いて当該被延伸物の表面に
水分を付着させるためのものであり、当該第1の加圧水
槽部には延伸槽部内の加圧飽和水蒸気と同等乃至は僅か
に高い絶対圧を有する加圧水が貯留される。一方、上記
第2の加圧水槽部は、前記の延伸物引き出し孔から加圧
飽和水蒸気が延伸槽部の外に漏出するのを防止するため
のものであると同時に、延伸物引き出し孔から引き出さ
れた延伸物を加圧水中に導いて冷却するためのものであ
り、当該第2の加圧水槽部内にも延伸槽部内の加圧飽和
水蒸気と同等乃至は僅かに高い絶対圧を有する加圧水が
貯留される。これら第1の加圧水槽部および第2の加圧
水槽部は、それぞれ延伸槽部の外側に配置されている。The above-mentioned stretching tank section has a desired absolute pressure (2. 1) in the same manner as a conventional stretching tank using pressurized saturated steam as a stretching medium.
Any pressure-saturated steam having a pressure of 0 kg / cm 2 or more) can be used as long as it has sufficient airtightness and strength to be able to be used as a stretching medium and can secure a desired size (length). In addition, the first pressurized water tank portion is for preventing pressurized saturated steam from leaking out of the stretching tank portion from the drawing object introduction hole formed in the stretching tank portion, It is for guiding the object to be stretched into pressurized water to cause moisture to adhere to the surface of the object to be stretched, and the first pressurized water tank is equivalent to or slightly higher than the pressurized saturated steam in the stretch tank. Pressurized water having an absolute pressure is stored. On the other hand, the second pressurized water tank portion is for preventing pressurized saturated steam from leaking out of the stretching tank portion from the stretched product drawing hole, and is drawn out from the stretched product drawing hole. And pressurized water having an absolute pressure equal to or slightly higher than that of the pressurized saturated steam in the stretch tank is also stored in the second pressurized water tank. . The first pressurized water tank and the second pressurized water tank are respectively arranged outside the stretching tank.
【0032】延伸槽部,第1の加圧水槽部および第2の
加圧水槽部は、それぞれ別個に形成されたものをこれら
が所定の関係となるように密接配置したものであっても
よいし、単一の容器または筒体を所定間隔で仕切ること
によって形成されたものであってもよい。また、延伸槽
部と第1の加圧水槽部とは、これらの間の隔壁を共有す
るものであってもよい。同様に、延伸槽部と第2の加圧
水槽部とは、これらの間の隔壁を共有するものであって
もよい。The stretching tank section, the first pressurized water tank section, and the second pressurized water tank section may be formed separately, and may be closely arranged so that they have a predetermined relationship. It may be formed by partitioning a single container or cylindrical body at predetermined intervals. Further, the stretching tank section and the first pressurized water tank section may share a partition wall therebetween. Similarly, the stretching tank section and the second pressurized water tank section may share a partition wall therebetween.
【0033】被延伸物は、第1の加圧水槽部の外側から
当該第1の加圧水槽部内を経由して上記の被延伸物導入
孔から延伸槽部内に入る。したがって、第1の加圧水槽
部の容器壁の所望箇所には、被延伸物を第1の加圧水槽
部内に引き込むための透孔(以下「透孔A」という。)
および被延伸物を第1の加圧水槽部から引き出すための
透孔(以下「透孔B」という。)が設けられている。The object to be stretched enters the stretching tank from the outside of the first pressurized water tank, through the inside of the first pressurized water tank, and through the above-described object introduction hole. Therefore, at a desired location on the container wall of the first pressurized water tank portion, a through hole (hereinafter, referred to as “through hole A”) for drawing the object to be stretched into the first pressurized water tank portion.
Further, a through-hole (hereinafter, referred to as “through-hole B”) for drawing out the object to be drawn from the first pressurized water tank portion is provided.
【0034】同様に、延伸槽部内に送り込まれた延伸物
が延伸されたことによって生じた延伸物は、延伸槽部に
設けられている上記の延伸物引き出し孔から第2の加圧
水槽部内を経由して当該第2の加圧水槽部の外へ引き出
されなければならないので、第2の加圧水槽部の容器壁
の所望箇所には、前記の延伸物を延伸槽部内から第2の
加圧水槽部内に引き込むための透孔(以下「透孔C」と
いう。)および前記の延伸物を第2の加圧水槽部内から
引き出すための透孔(以下「透孔D」という。)が設け
られている。Similarly, the stretched product produced by stretching the stretched product sent into the stretching bath portion passes through the above-mentioned stretched product drawing hole provided in the stretching bath portion through the second pressurized water tank portion. Then, the stretched product must be drawn out of the second pressurized water tank portion from the inside of the stretch tank portion to the desired portion of the container wall of the second pressurized water tank portion. A through-hole (hereinafter, referred to as “through-hole C”) for drawing in and a through-hole (hereinafter, referred to as “through-hole D”) through which the above-mentioned stretched product is drawn out of the second pressurized water tank portion are provided.
【0035】上記の被延伸物導入孔,延伸物引き出し
孔,透孔A,B,C,D、特に透孔B,Cは、これらの
孔を被延伸物または延伸物が通過する際に当該被延伸物
または延伸物と容器壁との接触が起こらないように形成
されていると共に配置されていることが好ましく、ま
た、これらの孔から延伸槽部内の加圧飽和水蒸気ができ
るだけ噴出しないように設計されていることが好まし
い。The above-mentioned object introduction hole, object drawing hole, and through holes A, B, C, and D, particularly through holes B and C, are used when the object or object passes through these holes. It is preferably formed and arranged so that the object to be drawn or the drawn object and the container wall do not come into contact with each other, and the pressurized saturated steam in the drawing tank is not spouted from these holes as much as possible. Preferably it is designed.
【0036】上記の延伸装置を構成している被延伸物送
出手段は、被延伸物を第1の加圧水槽部内へ一定の速度
で送り込むためのものであり、当該被延伸物送出手段は
第1の加圧水槽部の外側に設けられている。また、延伸
物引き出し手段は、第2の加圧水槽部を経由してきた延
伸物を被延伸物送出手段による被延伸物の送り込み速度
より高速で第2の加圧水槽部から一定の速度の下に引き
出すためのものであり、これによって、主として延伸槽
部内で被延伸物が延伸される。当該延伸物引き出し手段
は第2の加圧水槽部の外側に設けられている。The object to be stretched, which constitutes the stretching apparatus, is for feeding the object to be stretched into the first pressurized water tank at a constant speed. Is provided outside the pressurized water tank section. Further, the stretched object drawing means draws out the stretched material having passed through the second pressurized water tank at a constant speed from the second pressurized water tank at a higher speed than the feeding speed of the stretched object by the stretched object sending means. Thereby, the object to be stretched is stretched mainly in the stretching bath section. The stretched product withdrawing means is provided outside the second pressurized water tank.
【0037】被延伸物送出手段による被延伸物の送り込
み速度と延伸物引き出し手段による延伸物の引き出し速
度とは、所望の生産速度の下に所定の延伸倍率の延伸物
が得られるように適宜選択される。被延伸物送出手段お
よび延伸物引き出し手段としては、従来より延伸に使用
されている各種のローラを用いることができる。The feeding speed of the object to be drawn by the means for feeding the object to be drawn and the drawing speed of the object to be drawn by the means for drawing out the object to be drawn are appropriately selected so that a drawn material having a predetermined draw ratio can be obtained at a desired production rate. Is done. Various rollers conventionally used for stretching can be used as the object to be stretched and the stretched object withdrawing means.
【0038】本発明の方法に基づいて延伸物を製造する
にあたって上述した延伸装置を用いれば、目的とする一
軸延伸物を工業的に容易に得ることができる。なお、上
述した延伸装置を構成している第1の加圧水槽部に形成
されている前記の透孔Aから当該第1の加圧水槽部内の
加圧水が漏出することを抑制するうえからは、透孔Aを
水没させることによって当該透孔Aからの漏水を緩和さ
せる緩衝水槽部を第1の加圧水槽部の外側に設けること
が好ましい。同様に、第2の加圧水槽部に形成されてい
る前記の透孔Dから当該第2の加圧水槽部内の加圧水が
漏出することを抑制するうえからは、透孔Dを水没させ
ることによって当該透孔Dからの漏水を緩和させる緩衝
水槽部を第2の加圧水槽部の外側に設けることが好まし
い。When the above-described stretching apparatus is used for producing a stretched product based on the method of the present invention, the desired uniaxially stretched product can be industrially easily obtained. In order to prevent the pressurized water in the first pressurized water tank from leaking from the through-hole A formed in the first pressurized water tank constituting the above-described stretching device, the through-hole is required. It is preferable to provide a buffer water tank portion for reducing the leakage of water from the through-hole A by submerging A outside the first pressurized water tank portion. Similarly, in order to prevent the pressurized water in the second pressurized water tank from leaking from the through-hole D formed in the second pressurized water tank, the through-hole D is submerged by submersion. It is preferable to provide a buffer water tank for mitigating water leakage from the hole D outside the second pressurized water tank.
【0039】本発明の方法は、前述したように、目的と
する製品を得るにあたって延伸することが望まれる結晶
性高分子製の被延伸物を延伸する際に適用することがで
き、延伸条件は目的とする延伸物の材質(被延伸物の材
質),延伸物に求められる物性,生産性等を勘案して適
宜選択可能である。As described above, the method of the present invention can be applied to stretching a stretched object made of a crystalline polymer which is desired to be stretched in order to obtain a desired product. It can be appropriately selected in consideration of the material of the target stretched material (the material of the stretched object), the physical properties required for the stretched material, the productivity, and the like.
【0040】例えば、本発明の方法によって繊維強度の
高いPP繊維を得ようとする場合には、PP繊維の未延
伸糸、特に溶融紡糸糸を被延伸物として用い、当該未延
伸糸を絶対圧が3.0〜5.0kg/cm2 の加圧飽和
水蒸気中で6倍以上に延伸することが好ましい。そし
て、加圧飽和水蒸気の絶対圧は3.5〜4.5kg/c
m2 とすることがより好ましく、延伸倍率は7倍以上と
することがより好ましい。上記の未延伸糸は、PPホモ
ポリマーからなるものであってもよいし、PPとαオレ
フィン(例えばエチレン,ブテン−1等)との共重合体
からなるものであってもよい。PPホモポリマーからな
る未延伸糸としてはアイソタクチックPPからなるもの
が好ましく、当該アイソタクチックPPは結晶性の高い
もの、特にアイソタクチックペンダント分率(IPF)
が95%以上であるものが好ましい。For example, when a PP fiber having a high fiber strength is to be obtained by the method of the present invention, an undrawn yarn of the PP fiber, particularly a melt spun yarn, is used as an object to be drawn, and the undrawn yarn is subjected to an absolute pressure. Is preferably stretched 6 times or more in pressurized saturated steam of 3.0 to 5.0 kg / cm 2 . The absolute pressure of the pressurized saturated steam is 3.5 to 4.5 kg / c.
m 2, and the stretching ratio is more preferably 7 times or more. The undrawn yarn may be formed of a PP homopolymer, or may be formed of a copolymer of PP and an α-olefin (eg, ethylene, butene-1, etc.). The undrawn yarn made of PP homopolymer is preferably made of isotactic PP, and the isotactic PP has high crystallinity, particularly, isotactic pendant fraction (IPF).
Is preferably 95% or more.
【0041】アイソタクチックPPからなる未延伸糸を
本発明の方法によって延伸してPP繊維を得た場合、当
該PP繊維は、偏光下、クロスニコルの状態で観察した
ときに、繊維内部が暗部として視認される。この暗部
は、一様な暗さを呈するものではなく、周囲よりも一段
と暗い線状部分が繊維軸方向に幾本も認められるもので
ある。そして、当該暗部は、繊維の内部構造が変化した
領域(以下、この領域を「構造変化領域」という。)で
あると推察される。When an undrawn yarn made of isotactic PP is drawn by the method of the present invention to obtain a PP fiber, the PP fiber has a dark area when observed in crossed Nicols under polarized light. It is visually recognized as. The dark portion does not exhibit a uniform darkness, but has several linear portions darker than the surroundings in the fiber axis direction. Then, the dark portion is presumed to be a region in which the internal structure of the fiber has changed (hereinafter, this region is referred to as a “structural change region”).
【0042】なお、合成繊維を偏光下、クロスニコルの
状態で観察すると、多くの場合においては、繊維外周部
が連続した明部として視認される。したがって、本明細
書でいう「繊維内部」(偏光下、クロスニコルの状態で
観察したときの「繊維内部」)とは、偏光下、クロスニ
コルの状態で観察しときに「連続した明部として視認さ
れる繊維外周部」を除いた領域を意味する。When the synthetic fiber is observed in a crossed Nicols state under polarized light, the outer peripheral portion of the fiber is visually recognized as a continuous bright portion in many cases. Therefore, the term “inside the fiber” (“inside the fiber when observed in crossed Nicols” under polarized light) as used herein means “as a continuous bright portion” when observed in crossed Nicols under polarized light. It means a region excluding the “visible fiber outer peripheral portion”.
【0043】アイソタクチックPPからなる未延伸糸を
本発明の方法によって延伸して得たPP繊維における上
記の構造変化領域(暗部)は、繊維軸方向の全域に亘っ
て連続的に視認されるものではなく、当該構造変化領域
を横断するようにして繊維径方向に伸びている線状の明
部が断続的に視認される。そして、前記線状の明部は、
その全てが上記の構造変化領域を繊維径方向に完全に横
断しているように視認されるというものではなく、例え
ば図2に示すように、1本のPP繊維1においても、構
造変化領域2を繊維径方向に完全に横断しているように
視認されるもの3aや、構造変化領域2を繊維径方向の
一方の端からその途中までしか横断していないように視
認されるもの3b、あるいは、構造変化領域2内を繊維
径方向に部分的にしか横断していないように視認される
もの3c等、種々の形態のものが視認される。なお、図
2中の符号4は連続した明部として視認される繊維外周
部を示している。The above-mentioned structural change region (dark portion) in a PP fiber obtained by drawing an undrawn yarn made of isotactic PP by the method of the present invention is continuously observed over the entire region in the fiber axis direction. Instead, a linear bright portion extending in the fiber radial direction so as to cross the structural change region is visually recognized intermittently. And the linear bright part is
Not all of them are visually recognized as completely traversing the above-mentioned structural change region in the fiber diameter direction. For example, as shown in FIG. 3a which is visually recognized as completely traversing the fiber radial direction, one 3b which is visually recognized as only traversing the structure change region 2 from one end of the fiber radial direction to the middle thereof, or In addition, various forms such as 3c which are visually recognized as only partially crossing the inside of the structure change region 2 in the fiber radial direction are visible. In addition, the code | symbol 4 in FIG. 2 has shown the fiber outer peripheral part visually recognized as a continuous bright part.
【0044】したがって、本明細書でいう「暗部(構造
変化領域)を横断するようにして繊維径方向に伸びてい
る線状の明部が断続的に視認される」とは、(a) 暗部
(構造変化領域)を完全に横断するようにして繊維径方
向に伸びている線状の明部、(b) 暗部(構造変化領域)
を繊維径方向の一方の端からその途中までしか横断して
いないような線状の明部、または(c) 暗部(構造変化領
域)内を繊維径方向に部分的にしか横断していないよう
な線状の明部、が視認されることを意味する。Therefore, in this specification, "a linear light portion extending in the fiber radial direction so as to intersect a dark portion (structure-change region) is intermittently recognized" means (a) a dark portion. (B) Dark portion (structural change region), linear bright portion extending in the fiber radial direction so as to completely cross (structural change region)
Is a linear light part that only crosses from one end of the fiber radial direction to the middle, or (c) it only partially crosses the dark part (structure change area) in the fiber radial direction. This means that a linear bright portion is visually recognized.
【0045】上記の特徴を有するPP繊維は、本発明の
方法によって繊維強度およびヤング率が高いものを工業
的な生産速度、すなわち50m/分以上の生産速度の下
に容易に得ることができるものである。例えば、当該P
P繊維を偏光下、クロスニコルの状態で観察したときに
暗部として視認される繊維内部の全長をSとし、繊維長
をLとしたときに、前記の繊維長Lに占める前記暗部と
して視認される繊維内部の全長Sの百分率(S/L)×
100(%)(以下、この百分率を「構造変化領域の長
さ分率fc」という。)を60%以上とすれば、繊維強
度が概ね11g/d以上でヤング率が概ね600kg/
mm2 以上のものが得られる。The PP fiber having the above-mentioned characteristics can be obtained by the method of the present invention with a high fiber strength and a high Young's modulus easily at an industrial production speed, that is, at a production speed of 50 m / min or more. It is. For example, the P
When the P fiber is viewed in a crossed Nicols state under polarized light, the total length inside the fiber that is visually recognized as a dark part when observed as S, and the fiber length is L, is recognized as the dark part occupying the fiber length L. Percentage of total length S inside fiber (S / L) ×
If 100 (%) (hereinafter, this percentage is referred to as “length fraction fc of the structural change region”) is 60% or more, the fiber strength is about 11 g / d or more and the Young's modulus is about 600 kg / d.
mm 2 or more are obtained.
【0046】ここで、本明細書でいう上記構造変化領域
の長さ分率fcとは、以下のようにして求めたものを意
味する。まず、偏光下、クロスニコルの状態で上記のP
P繊維を顕微鏡観察し、当該PP繊維から計40箇所の
測定箇所を任意に抽出して、それぞれの測定箇所の拡大
顕微鏡写真を撮影する。このとき、測定箇所1箇所当た
りの繊維長は0.25mm以上とする。Here, the length fraction fc of the structural change region referred to in the present specification means a value obtained as follows. First, the above-mentioned P
The P fiber is observed under a microscope, a total of 40 measurement points are arbitrarily extracted from the PP fiber, and an enlarged micrograph of each measurement point is taken. At this time, the fiber length per measurement point is set to 0.25 mm or more.
【0047】次に、測定箇所の写真毎に、図3(a)に
示すように、構造変化領域2を横断するようにして繊維
径方向に伸びている線状の明部3a,3bまたは3c全
てについて、その繊維軸方向の最大幅に相当する領域A
1 ,A2 ,A3 ,…An を暗部2の繊維径方向に沿って
画定する。そして、これらの領域A1 ,A2 ,A3 ,…
An に隣接している暗部2の繊維軸方向の長さL1 ,L
2 ,L3 ,L4 ,…LN を測定する。Next, as shown in FIG. 3A, for each photograph of the measurement location, a linear bright portion 3a, 3b or 3c extending in the fiber radial direction so as to cross the structural change region 2. A region A corresponding to the maximum width in the fiber axis direction for all
1 , A 2 , A 3 ,... An are defined along the fiber diameter direction of the dark portion 2. Then, these areas A 1 , A 2 , A 3 ,.
The length of the fiber axis direction of the dark part 2 adjacent to the A n L 1, L
2 , L 3 , L 4 ,..., L N are measured.
【0048】また、図3(b)に示すように、前記の領
域A1 ,A2 ,A3 ,…An それぞれについて、繊維径
方向に沿って10箇所の計測点を等間隔で設定して各計
測点における暗部2の繊維軸方向の長さl1 ,l2 ,l
3 ,…l10を測定し、これらの平均値をとる。そして、
前記の平均値をもって各領域A1 ,A2 ,A3 ,…An
における暗部2の長さLA1,LA2,LA3,…LAn とす
る。Further, as shown in FIG. 3 (b), the area A 1, A 2, A 3 , ... for A n, respectively, of the ten measuring points set at equal intervals along the fiber diameter direction And the length l 1 , l 2 , l of the dark portion 2 in the fiber axis direction at each measurement point
3, were measured ... l 10, taking the average value thereof. And
Each of the areas A 1 , A 2 , A 3 ,.
, L A1 , L A2 , L A3 ,... L An .
【0049】この後、前記の長さL1 ,L2 ,L3 ,L
4 ,…LN および前記の長さLA1,LA2,LA3,…LAn
の総和を測定箇所毎に求め、この値を各測定箇所(全4
0箇所)における暗部2の全長とみなして測定箇所毎に
測定全長(測定箇所の繊維長)に占める暗部2の全長の
長さ分率を求め、これら40箇所の平均値をとることに
よって、繊維長Lに占める暗部(構造変化領域)の全長
Sの百分率、すなわち「構造変化領域の長さ分率fc」
とする。なお、図3(a)〜図3(b)に示した各部の
うちで図2に示したものと共通するものについては、図
2と同じ符号を付してある。Thereafter, the lengths L 1 , L 2 , L 3 , L
4, ... L N and the lengths L A1, L A2, L A3 , ... L An
Is calculated for each measurement point, and this value is calculated for each measurement point (4 total).
0), the fraction of the total length of the dark portion 2 in the total measurement length (fiber length of the measurement location) is determined for each measurement location, and the average value of these 40 locations is determined. Percentage of the total length S of the dark portion (structure change region) in the length L, that is, “length fraction fc of structure change region”
And 3 (a) and FIG. 3 (b) are denoted by the same reference numerals as those in FIG. 2 for components common to those shown in FIG.
【0050】アイソタクチックPPからなる未延伸糸
(溶融紡糸糸)のなかでも、IPFが95〜100%、
好ましくは97〜100%のアイソタクチックPPから
なる未延伸糸を被延伸物として用いた場合には、高温環
境下においても高い物性値を示すPP繊維を容易に得る
ことができ、Q値が4未満のアイソタクチックPPから
なる未延伸糸を被延伸物として用いた場合には、容易に
高倍率延伸を行うことが可能になり、高倍率で延伸する
ことに伴って繊維の分子配向が促進されるので、よりヤ
ング率の高いPP繊維を容易に得ることが可能になる。Among the undrawn yarns (melt spun yarns) made of isotactic PP, the IPF is 95 to 100%,
When an undrawn yarn composed of preferably 97 to 100% isotactic PP is used as an object to be drawn, a PP fiber exhibiting high physical properties even under a high-temperature environment can be easily obtained, and the Q value is high. When an undrawn yarn composed of less than 4 isotactic PP is used as the object to be drawn, it is possible to easily perform high-magnification drawing, and the molecular orientation of the fiber is increased with the high-magnification drawing. Since it is promoted, it becomes possible to easily obtain a PP fiber having a higher Young's modulus.
【0051】例えば、IPFが95〜100%、好まし
くは97〜100%で、Q値が4未満であるアイソタク
チックPPからなる未延伸糸を被延伸物として用い、延
伸媒体としての加圧飽和水蒸気の絶対圧を2.0〜5.
0kg/cm2 にした場合には、延伸倍率を7.5倍以
上、望ましくは10倍以上にすることによって、常温時
のヤング率が概ね800kg/mm2 以上で、120℃
における熱収縮率が概ね5%未満のPP繊維を工業的に
容易に得ることができ、また、120℃におけるヤング
率が概ね500kg/mm2 以上のPP繊維を工業的に
容易に得ることができる。当該PP繊維の繊維強度は概
ね11.5g/d以上と高く、その構造変化領域の長さ
分率fcは概ね65%以上である。なお、上記の場合に
得られるPP繊維の120℃における熱収縮率は、延伸
倍率が概ね6倍程度までは延伸倍率の増大に伴って増大
するが、それ以降は延伸倍率の増大に伴って減少すると
いう特異な振る舞いを示す。For example, an unstretched yarn made of isotactic PP having an IPF of 95 to 100%, preferably 97 to 100% and a Q value of less than 4 is used as an object to be stretched, and is subjected to pressure saturation as a stretching medium. The absolute pressure of water vapor is 2.0-5.
In the case of 0 kg / cm 2 , the Young's modulus at room temperature is generally 800 kg / mm 2 or more by setting the stretching ratio to 7.5 times or more, desirably 10 times or more.
PP fiber having a heat shrinkage of less than about 5% can be industrially easily obtained, and a PP fiber having a Young's modulus at 120 ° C. of about 500 kg / mm 2 or more can be industrially easily obtained. . The fiber strength of the PP fiber is as high as about 11.5 g / d, and the length fraction fc of the structural change region is about 65% or more. In addition, the heat shrinkage at 120 ° C. of the PP fiber obtained in the above case increases with an increase in the draw ratio up to approximately 6 times, but thereafter decreases with an increase in the draw ratio. It shows the peculiar behavior of doing.
【0052】さらに、延伸媒体としての加圧飽和水蒸気
の絶対圧を概ね3.8kg/cm2(温度は概ね140
℃)以上にしてアイソタクチックPPからなる未延伸糸
を高倍率で延伸することにより、キシレン,トルエンお
よびモノクロロベンゼンのいずれかの芳香族有機溶剤に
対して、当該芳香族有機溶剤の液温100℃,浸漬時間
15分の条件の下に浸漬しても溶解せずに繊維形態を維
持しているだけの耐薬品性を有しているPP繊維を容易
に得ることが可能になる。Further, the absolute pressure of the pressurized saturated steam as a stretching medium is set to about 3.8 kg / cm 2 (the temperature is set to about 140 kg / cm 2 ).
C.) or higher and the unstretched yarn made of isotactic PP is stretched at a high magnification, so that the aromatic organic solvent of xylene, toluene or monochlorobenzene has a liquid temperature of 100%. It is possible to easily obtain PP fiber having chemical resistance enough to maintain the fiber form without being dissolved even when immersed under the conditions of 15 ° C. and immersion time of 15 minutes.
【0053】ここで、本明細書でいう「溶解せずに繊維
形態を維持している」とは下記(1)または(2) の状態を
意味している。 (1) 溶剤に実質的に溶解せず、かつ、収縮による形状の
変化も実質的に起こしていない状態 (2) 部分的に溶解するが、分断や、収縮による形状の変
化は実質的に起こしていない状態 (3) 収縮を起こして形状が変化するが、それでもなお、
繊維形状を呈している状態Here, "maintaining the fiber form without dissolving" in the present specification means the following condition (1) or (2). (1) Not substantially dissolved in the solvent and the shape change due to shrinkage has not substantially occurred. (2) Partially dissolved, but the shape change due to fragmentation or shrinkage has substantially occurred. (3) The shape changes due to shrinkage, but
State of showing fiber shape
【0054】上記の耐薬品性を有しているPP繊維を得
るうえからは、IPFが概ね95以上、好ましくは95
〜97で、Q値が概ね3.6〜6.0、好ましくは3.
6以上4.0未満で、メルトインデックス(MI)が概
ね3〜30、好ましくは15〜25であるアイソタクチ
ックPPを原料として用いて得た溶融紡糸糸(未延伸
糸)を被延伸物として用いることが好ましく、上記の加
圧飽和水蒸気の絶対圧は、概ね4.2kg/cm2 (温
度は概ね145℃)以上にすることが好ましい。延伸倍
率については、得られるPP繊維の耐薬品性が使用原料
および延伸条件それぞれの影響を受ける他に、未延伸糸
の繊度や紡糸条件の影響をも受けるので、一概に規定す
ることはできない。しかしながら、得られるPP繊維の
結晶化度が高いほど前記の耐薬品性も向上する傾向があ
ることから、当該結晶化度が高くなるように、延伸倍率
はできるだけ高倍率(例えば9倍以上)とすることが好
ましい。前記の結晶化度が概ね70%以上となるように
原料,紡糸条件,未延伸糸の繊度,延伸条件を選択すれ
ば、キシレン,トルエンおよびモノクロロベンゼンのい
ずれの芳香族有機溶剤に対しても、当該芳香族有機溶剤
の液温100℃,浸漬時間15分の条件の下に浸漬して
も溶解せずに繊維形態を維持しているだけの耐薬品性を
有しているPP繊維を容易に得ることが可能になる。In order to obtain the above-mentioned PP fiber having chemical resistance, the IPF should be about 95 or more, preferably 95% or more.
The Q value is approximately 3.6 to 6.0, preferably 3.0.
A melt-spun yarn (undrawn yarn) obtained using isotactic PP having a melt index (MI) of 6 to less than 4.0 and a melt index (MI) of approximately 3 to 30, preferably 15 to 25 as a raw material is used as a material to be drawn. Preferably, the absolute pressure of the above-mentioned pressurized saturated steam is approximately 4.2 kg / cm 2 (temperature is approximately 145 ° C.) or more. The draw ratio cannot be specified unconditionally because the chemical resistance of the obtained PP fiber is affected not only by the raw materials used and the drawing conditions but also by the fineness of the undrawn yarn and the spinning conditions. However, the higher the crystallinity of the obtained PP fiber, the higher the chemical resistance tends to be. Therefore, the draw ratio should be as high as possible (for example, 9 times or more) so that the crystallinity increases. Is preferred. If the raw materials, spinning conditions, fineness of undrawn yarn, and drawing conditions are selected so that the above-mentioned crystallinity is approximately 70% or more, any aromatic organic solvent such as xylene, toluene and monochlorobenzene can be used. Even if the aromatic organic solvent is immersed under the conditions of a liquid temperature of 100 ° C. and an immersion time of 15 minutes, the PP fiber having the chemical resistance sufficient to maintain the fiber form without dissolving easily can be easily prepared. It is possible to obtain.
【0055】一方、前述した共重合体からなる未延伸糸
を本発明の方法によって延伸してPP繊維を得た場合に
は、当該PP繊維を偏光下、クロスニコルの状態で観察
しても前述した構造変化領域(暗部)が認められない場
合がある。しかしながら、本発明の方法によって前記共
重合体からなる未延伸糸を延伸すれば、得られたPP繊
維に前記の構造変化領域(暗部)が認められるか否かに
拘わらず、繊維強度およびヤング率が高いものを工業的
な生産速度、すなわち50m/分以上の生産速度の下に
容易に得ることができる。On the other hand, when a PP fiber is obtained by drawing an undrawn yarn made of the above-mentioned copolymer by the method of the present invention, the PP fiber may be observed under crossed Nicols under polarized light. In some cases, a changed structure change region (dark portion) is not recognized. However, if the unstretched yarn made of the copolymer is stretched by the method of the present invention, the fiber strength and Young's modulus are determined regardless of whether the structural change region (dark portion) is observed in the obtained PP fiber. Can be easily obtained at an industrial production speed of 50 m / min or more.
【0056】本発明の方法によってPP繊維を得るよう
にすれば、前述したように繊維強度およびヤング率が高
いPP繊維、例えば繊維強度が11g/d以上でヤング
率が600kg/mm2 以上であるPP繊維を工業的に
容易に得ることができ、しかも、このようなPP繊維の
熱収縮率は120℃において概ね0.5〜8%と比較的
低い。さらに、本発明の方法によって特定のアイソタク
チックPPからなるPP繊維を得るようにすれば、上述
したように繊維強度およびヤング率が高く120℃にお
ける熱収縮率が概ね5%未満と低いPP繊維や、120
℃という高温下においてもヤング率が概ね500kg/
mm2 以上と高いPP繊維、あるいは耐薬品性が更に向
上したPP繊維を工業的に容易に得ることができる。When the PP fiber is obtained by the method of the present invention, as described above, a PP fiber having a high fiber strength and a high Young's modulus, for example, a fiber strength of 11 g / d or more and a Young's modulus of 600 kg / mm 2 or more. PP fibers can be easily obtained industrially, and the heat shrinkage of such PP fibers is relatively low at 120 ° C., generally 0.5 to 8%. Furthermore, if a PP fiber made of a specific isotactic PP is obtained by the method of the present invention, as described above, the PP fiber having a high fiber strength and a high Young's modulus and a low heat shrinkage at 120 ° C. of generally less than 5% is low. No, 120
Even at a high temperature of ℃, Young's modulus is approximately 500 kg /
A PP fiber as high as 2 mm 2 or more, or a PP fiber with further improved chemical resistance can be industrially easily obtained.
【0057】したがって、上記のPP繊維はその繊度
(重量デニール)を目的とする用途に応じて概ね1〜3
0dの範囲内で適宜選択することにより、ロープ,安全
ネット,ベルトストリング等用の材料繊維、各種ケーブ
ル,セメント,ゴム等用の補強繊維、織布や不織布の材
料繊維、フィルター用繊維等、種々の用途に利用するこ
とができる。Therefore, the above PP fiber is generally 1 to 3 depending on the intended use for its fineness (denier by weight).
By properly selecting the material within the range of 0d, various materials such as ropes, safety nets, material fibers for belt strings, etc., reinforcing fibers for various cables, cement, rubber, etc., material fibers for woven and non-woven fabrics, fibers for filters, etc. It can be used for applications.
【0058】次に本発明の延伸物について説明する。本
発明の延伸物は、前述したように、被延伸物を上述した
本発明の延伸方法によって延伸して得たものである。Next, the stretched product of the present invention will be described. As described above, the stretched article of the present invention is obtained by stretching the article to be stretched by the above-described stretching method of the present invention.
【0059】本発明の延伸方法についての説明の中で述
べたように、当該延伸方法は目的とする延伸物を工業的
な生産速度の下に容易に得ることが可能な方法である。
そして、この延伸方法によれば、従来の延伸方法による
場合よりも被延伸物を大きく変形させることが可能にな
り、これによって従来よりもより好ましい物性を有して
いる延伸物を得ることが可能になる。また、被延伸物を
従来と同量変形させた場合でも、より好ましい物性を有
している延伸物を得ることが可能になる。As described in the description of the stretching method of the present invention, the stretching method is a method capable of easily obtaining a desired stretched product at an industrial production rate.
According to this stretching method, the object to be stretched can be deformed to a greater extent than in the case of the conventional stretching method, whereby it is possible to obtain a stretched object having more preferable physical properties than the conventional one. become. Further, even when the object to be stretched is deformed by the same amount as the conventional one, a stretched object having more preferable physical properties can be obtained.
【0060】したがって、本発明の延伸物は、より好ま
しい物性を有しているものを工業的に得ることが容易な
延伸物である。延伸物の具体例および当該延伸物の材料
となる被延伸物については、本発明の延伸方法について
の説明の中で既に述べてあるので、ここではその説明を
省略する。Therefore, the stretched product of the present invention is a stretched product having more preferable physical properties and which can be industrially easily obtained. Specific examples of the stretched material and the material to be stretched as the material of the stretched material have already been described in the description of the stretching method of the present invention, and thus the description thereof is omitted here.
【0061】次に、本発明のPP繊維加工品について説
明する。本発明のPP繊維加工品は、前述したように、
本発明の延伸物の1つであるPP繊維を材料繊維とし、
フィラメント,ショートカットチョップおよびステープ
ルファイバーのいずれかの繊維形態を有するものであ
る。Next, the processed PP fiber product of the present invention will be described. The PP fiber processed product of the present invention, as described above,
PP fiber, which is one of the drawn products of the present invention, is used as a material fiber,
It has any fiber form of filament, shortcut chop and staple fiber.
【0062】ここで、本明細書でいう「フィラメント」
とは、機械的に巻き取ることができる長い繊維(長繊
維)を意味し、当該「フィラメント」は単繊維(モノフ
ィラメント)であってもよいし、複数本の単繊維が集合
したマルチフィラメントであってもよく、捲縮の有無は
問わない。また、本明細書でいう「ショートカットチョ
ップ」とは、長さが20mm未満の繊維を意味し、捲縮
の有無は問わない。そして、本明細書でいう「ステープ
ルファイバー」とは、捲縮を有する長さ20mm以上の
繊維を意味する。上記いずれかの繊維形態を有する本発
明のPP繊維加工品は、前述した本発明の延伸物の1つ
であるPP繊維を材料繊維として用いて、常法により所
望の繊維形態に加工することにより得ることができる。Here, the “filament” referred to in this specification
The term “filament” means a long fiber (long fiber) that can be mechanically wound, and the “filament” may be a single fiber (monofilament) or a multifilament in which a plurality of single fibers are aggregated. The presence or absence of crimping does not matter. Further, the “shortcut chop” as used herein means a fiber having a length of less than 20 mm, and it does not matter whether or not the fiber is crimped. The term “staple fiber” as used herein means a fiber having a crimp length of 20 mm or more. The processed PP fiber product of the present invention having any one of the fiber forms described above is processed into a desired fiber form by a conventional method using PP fiber, which is one of the above-described drawn products of the present invention, as a material fiber. Obtainable.
【0063】本発明のPP繊維加工品の繊維形態をフィ
ラメントとした場合、このPP繊維加工品は、例えば織
布タイプのフィルター(濾材),筒体ケースに繊維を直
接ワインディングしたカートリッジタイプのフィルター
(濾材),編み加工したネット(建築用),織り加工し
たシート(建築用シート基材),ロープ,ベルト等の材
料繊維として利用することができる。また、PP繊維加
工品の繊維形態をショートカットチョップとした場合、
このPP繊維加工品は、例えば自動車タイヤ用補強繊
維,抄紙不織布用繊維等として利用することができる。
そして、PP繊維加工品の繊維形態をステープルファイ
バーとした場合、このPP繊維加工品は、例えば自動車
用フロアーカーペット,2次電池用のセパレータ,フィ
ルター(濾材)等として使用される不織布の材料繊維と
して利用することができる。When the fiber form of the processed PP fiber product of the present invention is a filament, the processed PP fiber product may be, for example, a woven fabric type filter (filter material) or a cartridge type filter (a fiber wound directly into a cylindrical case). It can be used as a material fiber for filter media, knitted nets (for construction), woven sheets (construction sheet base material), ropes, belts and the like. When the fiber form of the processed PP fiber product is a shortcut chop,
This processed PP fiber product can be used, for example, as a reinforcing fiber for an automobile tire, a fiber for a papermaking nonwoven fabric, or the like.
When the fiber form of the processed PP fiber is a staple fiber, the processed PP fiber is used as a material fiber of a nonwoven fabric used as, for example, an automobile floor carpet, a separator for a secondary battery, a filter (filter material), or the like. Can be used.
【0064】特に、120℃における熱収縮率が概ね5
%未満のPP繊維または120℃におけるヤング率が5
00kg/mm2 以上のPP繊維を材料繊維とするPP
繊維加工品は、上記の各種フィルター(濾材)用の材料
繊維,自動車タイヤ用補強繊維,自動車用フロアーカー
ペットの材料繊維,2次電池用のセパレーターの材料と
して好適である。In particular, the heat shrinkage at 120 ° C. is approximately 5
% PP fiber or a Young's modulus at 120 ° C. of 5
PP using PP fiber of 00 kg / mm 2 or more as material fiber
The processed fiber product is suitable as a material fiber for the above-mentioned various filters (filter media), a reinforcing fiber for an automobile tire, a material fiber for a floor carpet for an automobile, and a material for a separator for a secondary battery.
【0065】[0065]
【実施例】以下、本発明の実施例について説明する。 実施例1 (1)被延伸物(溶融紡糸糸)の作製 アイソタクチックペンダント分率(以下「IPF」と略
記する。)が97%、Q値が3.6、メルトインデック
ス(MI)が22であるアイソタクチックPP(日本ポ
リケム社製のSA1HA)を原料として用い、ホール径
が0.5mmφ、ホール数が120である紡糸ノズルを
備えた溶融紡糸装置によって紡糸温度260℃,紡糸速
度600m/分の条件の下に溶融紡糸を行って、単糸デ
ニールが25dの溶融紡糸糸(未延伸糸)を得た。Embodiments of the present invention will be described below. Example 1 (1) Production of an object to be drawn (melt spun yarn) An isotactic pendant fraction (hereinafter abbreviated as “IPF”) is 97%, a Q value is 3.6, and a melt index (MI) is 22. Using isotactic PP (SA1HA manufactured by Nippon Polychem Co., Ltd.) as a raw material, and a spinning temperature of 260 ° C. and a spinning speed of 600 m / by a melt spinning apparatus equipped with a spinning nozzle having a hole diameter of 0.5 mmφ and 120 holes. The melt-spinning was performed under the conditions of minutes to obtain a melt-spun yarn (undrawn yarn) having a single yarn denier of 25d.
【0066】(2)PP繊維(延伸糸)の製造 まず、中央部に透孔を有するシリコーンゴムパッキンを
筒体の両端および内部(それぞれ4箇所)に配置するこ
とによって延伸槽部(全長12.5m),第1の加圧水
槽部および第2の加圧水槽部が形成されており、第1の
加圧水槽の外側に未延伸糸送出手段としてのローラが、
また第2の加圧水槽の外側に繊維引き出し手段としての
ローラがそれぞれ配設されている延伸装置を用意した。(2) Production of PP Fiber (Drawing Yarn) First, a silicone rubber packing having a through hole in the center is disposed at both ends and inside (four places) of the cylindrical body, thereby forming a stretching tank part (12. 5m), a first pressurized water tank section and a second pressurized water tank section are formed, and a roller as an undrawn yarn sending means is provided outside the first pressurized water tank.
Further, a drawing device was prepared in which rollers as fiber drawing means were respectively provided outside the second pressurized water tank.
【0067】この延伸装置を用いて未延伸糸を延伸する
にあたり、延伸槽部に絶対圧が4.2kg/cm2 の加
圧飽和水蒸気(温度145℃)を充填し、当該延伸槽部
の内圧よりわずかに高い圧力の高圧水を第1の加圧水槽
部および第2の加圧水槽部にそれぞれ貯留させた後、前
記(1)で得た未延伸糸を延伸倍率が11.5倍,繊維
引き出し手段による延伸糸の引き出し速度が50m/分
となるようにして当該延伸装置によって延伸して、目的
とするPP繊維を得た。When drawing an undrawn yarn using this drawing apparatus, the drawing tank is filled with pressurized saturated steam (temperature: 145 ° C.) having an absolute pressure of 4.2 kg / cm 2 , and the internal pressure of the drawing tank is adjusted. After storing high-pressure water of slightly higher pressure in the first pressurized water tank and the second pressurized water tank, respectively, the undrawn yarn obtained in the above (1) was drawn at a draw ratio of 11.5 times, and the fiber was drawn out. The drawn yarn was drawn by the drawing device such that the drawing speed of the drawn yarn by the means became 50 m / min to obtain a target PP fiber.
【0068】このようにして得たPP繊維を偏光下、ク
ロスニコルの状態で顕微鏡観察し、その拡大顕微鏡写真
(×400倍)を撮影した。この写真の写しを図1に示
す。図1に示したように、このPP繊維の外周部は明部
として視認され、繊維内部は暗部として視認される。そ
して、前記の暗部(構造変化領域)を横断するようにし
て繊維径方向に伸びている線状の明部が断続的に視認さ
れる。The thus obtained PP fiber was observed under a polarized light in a crossed Nicols state under a microscope, and a magnified micrograph (× 400) was taken. A copy of this photograph is shown in FIG. As shown in FIG. 1, the outer periphery of the PP fiber is visually recognized as a bright portion, and the inside of the fiber is visually recognized as a dark portion. Then, a linear bright portion extending in the fiber radial direction so as to cross the dark portion (structure change region) is intermittently visually recognized.
【0069】実施例2 実施例1(1)と同条件で未延伸糸を作製し、加圧飽和
水蒸気の絶対圧を3.0kg/cm2 (温度は133
℃),延伸倍率を8倍とした以外は実施例1(2)と同
条件で当該未延伸糸を延伸して、目的とするPP繊維を
得た。このPP繊維を偏光下、クロスニコルの状態で顕
微鏡観察したところ、実施例1で得たPP繊維と同様の
形態を示していた。Example 2 An undrawn yarn was produced under the same conditions as in Example 1 (1), and the absolute pressure of saturated steam under pressure was 3.0 kg / cm 2 (temperature was 133
C) and the undrawn yarn was drawn under the same conditions as in Example 1 (2) except that the draw ratio was set to 8 times, to obtain a target PP fiber. Microscopic observation of the PP fiber in a crossed Nicols state under polarized light showed the same form as the PP fiber obtained in Example 1.
【0070】実施例3 実施例1(1)と同条件で未延伸糸を作製し、加圧飽和
水蒸気の絶対圧を5.0kg/cm2 (温度は151
℃),延伸倍率を11.5倍とした以外は実施例1
(2)と同条件で当該未延伸糸を延伸して、目的とする
PP繊維を得た。このPP繊維を偏光下、クロスニコル
の状態で顕微鏡観察したところ、実施例1で得たPP繊
維と同様の形態を示していた。Example 3 An undrawn yarn was produced under the same conditions as in Example 1 (1), and the absolute pressure of the pressurized saturated steam was adjusted to 5.0 kg / cm 2 (temperature was set to 151
° C) and Example 1 except that the stretching ratio was 11.5 times.
The undrawn yarn was drawn under the same conditions as in (2) to obtain the desired PP fiber. Microscopic observation of the PP fiber in a crossed Nicols state under polarized light showed the same form as the PP fiber obtained in Example 1.
【0071】実施例4 実施例1(1)と同条件で未延伸糸を作製し、延伸倍率
を6倍とした以外は実施例1(2)と同条件で当該未延
伸糸を延伸して、目的とするPP繊維を得た。このPP
繊維を偏光下、クロスニコルの状態で顕微鏡観察したと
ころ、実施例1で得たPP繊維と同様の形態を示してい
た。Example 4 An undrawn yarn was produced under the same conditions as in Example 1 (1), and the undrawn yarn was drawn under the same conditions as in Example 1 (2) except that the draw ratio was 6 times. Thus, the desired PP fiber was obtained. This PP
Microscopic observation of the fiber under crossed Nicols under polarized light showed the same form as the PP fiber obtained in Example 1.
【0072】実施例5 (1)被延伸物(溶融紡糸糸)の作製 アイソタクチックペンダント分率(IPF)が95%、
Q値が6.7、メルトインデックス(MI)が0.65
であるアイソタクチックPP(日本ポリケム社製のEA
9)を原料として用い、更に、分子量調整剤として過酸
化物(2,5−ジメチル−2,5−ジ(t−ブチルペル
オキシ)ヘキサン)を500ppm用いて、ホール径が
0.4mmφ、ホール数が500である紡糸ノズルを備
えた溶融紡糸装置によって、紡糸温度300℃,紡糸速
度200m/分の条件の下に溶融紡糸を行って、単糸デ
ニールが10dの溶融紡糸糸(未延伸糸)を得た。Example 5 (1) Preparation of an object to be drawn (melt spun yarn) The isotactic pendant fraction (IPF) was 95%,
Q value is 6.7 and melt index (MI) is 0.65
Isotactic PP (EA manufactured by Nippon Polychem Co., Ltd.)
9) as a raw material, 500 ppm of peroxide (2,5-dimethyl-2,5-di (t-butylperoxy) hexane) as a molecular weight regulator, a hole diameter of 0.4 mmφ, and a number of holes. Is melt-spun under the conditions of a spinning temperature of 300 ° C. and a spinning speed of 200 m / min to produce a melt-spun yarn (undrawn yarn) having a single denier of 10d. Obtained.
【0073】(2)PP繊維(延伸糸)の製造 延伸倍率を7倍とした以外は実施例1と同条件で上記
(1)で得た未延伸糸を延伸して、目的とするPP繊維
を得た。このPP繊維を偏光下、クロスニコルの状態で
顕微鏡観察したところ、実施例1で得たPP繊維と同様
の形態を示していた。(2) Production of PP Fiber (Stretched Yarn) The unstretched yarn obtained in (1) above was stretched under the same conditions as in Example 1 except that the draw ratio was changed to 7 times, to obtain the desired PP fiber. I got Microscopic observation of the PP fiber in a crossed Nicols state under polarized light showed the same form as the PP fiber obtained in Example 1.
【0074】比較例1 実施例1(1)と同条件で未延伸糸を作製し、この未延
伸糸を槽長2m,温度145℃のシリコーンオイルバス
中で8m/分の延伸速度の下に11.5倍に延伸して、
PP繊維を得た。このPP繊維を偏光下、クロスニコル
の状態で顕微鏡観察したところ、暗部(構造変化領域)
は視認されなかった。Comparative Example 1 An undrawn yarn was produced under the same conditions as in Example 1 (1), and the undrawn yarn was placed in a silicone oil bath having a bath length of 2 m and a temperature of 145 ° C. under a drawing speed of 8 m / min. Stretched 11.5 times,
A PP fiber was obtained. Microscopic observation of the PP fiber under crossed Nicols under polarized light revealed a dark area (structure-change area).
Was not visible.
【0075】比較例2 実施例1(1)と同条件で未延伸糸を作製し、この未延
伸糸を150℃の金属ロールと板状ヒータとを用いた接
触加熱延伸によって延伸速度5m/分の下にその可能延
伸倍率(6.3倍)まで延伸して、PP繊維を得た。な
お、「可能延伸倍率」とは、延伸切れが生じない最大延
伸倍率を意味する(以下同じ。)。上記のPP繊維を偏
光下、クロスニコルの状態で顕微鏡観察したところ、暗
部(構造変化領域)は視認されなかった。Comparative Example 2 An undrawn yarn was produced under the same conditions as in Example 1 (1), and the undrawn yarn was drawn by contact heating using a metal roll at 150 ° C. and a plate heater at a drawing speed of 5 m / min. The PP fiber was drawn to the possible draw ratio (6.3 times). The "possible stretching ratio" means the maximum stretching ratio at which stretching breakage does not occur (the same applies hereinafter). When the above PP fiber was observed under a crossed Nicols state under polarized light, no dark portion (structure-changed region) was visually recognized.
【0076】比較例3 実施例1(1)と同条件で未延伸糸を作製し、加圧飽和
水蒸気の絶対圧を1.65kg/cm2 (温度は115
℃),延伸倍率を6.8倍とした以外は実施例1(2)
と同条件で当該未延伸糸を延伸して、PP繊維を得た。
このPP繊維を偏光下、クロスニコルの状態で顕微鏡観
察したところ、暗部(構造変化領域)は視認されなかっ
た。Comparative Example 3 An undrawn yarn was produced under the same conditions as in Example 1 (1), and the absolute pressure of saturated steam under pressure was 1.65 kg / cm 2 (temperature was 115
° C) and Example 1 (2) except that the draw ratio was 6.8 times.
The undrawn yarn was drawn under the same conditions as described above to obtain a PP fiber.
Microscopic observation of the PP fiber in a crossed Nicols state under polarized light revealed no dark part (structure-changed area).
【0077】物性値等の測定I 実施例1〜実施例5および比較例1〜比較例3でそれぞ
れ得たPP繊維について、その繊度(重量デニール),
繊維強度,ヤング率,伸度および120℃における熱収
縮率を測定した。また、本発明でいう構造変化領域の長
さ分率fcを求めた。これらの結果を表1に示す。な
お、上記の繊度,繊維強度,ヤング率,伸度および12
0℃における熱収縮率は、それぞれJIS L 101
3に基づいて下記のようにして測定した。 Measurement of Physical Properties, etc. I For the PP fibers obtained in Examples 1 to 5 and Comparative Examples 1 to 3, the fineness (denier weight),
Fiber strength, Young's modulus, elongation and heat shrinkage at 120 ° C. were measured. In addition, the length fraction fc of the structure change region according to the present invention was determined. Table 1 shows the results. The fineness, fiber strength, Young's modulus, elongation and 12
The heat shrinkage rate at 0 ° C. was determined according to JIS L 101
3 was measured as follows.
【0078】(1) 繊度 簡便法により測定した。 (2) 繊維強度,ヤング率,伸度 つかみ間隔20mm,引張速度20mm/分の条件で単
繊維について引張破断試験を行って測定した。 (3) 120℃における熱収縮率 120℃のオーブンを用い、マルチフィラメントについ
て乾熱収縮率(B法)を測定した。(1) Fineness Measured by a simple method. (2) Fiber strength, Young's modulus, elongation Measured by performing a tensile break test on a single fiber under the conditions of a gripping interval of 20 mm and a tensile speed of 20 mm / min. (3) Heat shrinkage at 120 ° C. Using a 120 ° C. oven, the dry heat shrinkage (method B) of the multifilament was measured.
【0079】[0079]
【表1】 [Table 1]
【0080】表1に示したように、溶融紡糸糸を本発明
の方法によって延伸して得た実施例1〜実施例5の各P
P繊維は、偏光下、クロスニコルの状態で観察したとき
に、繊維内部が暗部として視認されると共に当該暗部
(構造変化領域)を横断するようにして繊維径方向に伸
びている線状の明部が断続的に視認されるものであり、
これらのPP繊維は、50m/分という引き取り速度の
下に得たものであるにも拘わらず、11.3〜13.3
g/dという高い繊維強度を有している。また、これら
のPP繊維はヤング率が630〜1300kg/mm2
と高く、120℃における熱収縮率が0.3〜8.0%
と小さいものである。As shown in Table 1, each P of Examples 1 to 5 obtained by drawing a melt spun yarn by the method of the present invention.
When observed in a crossed Nicols state under polarized light, the P fiber is a linear light extending in the fiber radial direction such that the inside of the fiber is visually recognized as a dark part and crosses the dark part (structural change region). Part is visible intermittently,
Although these PP fibers were obtained under a take-off speed of 50 m / min, 11.3 to 13.3.
It has a high fiber strength of g / d. These PP fibers have a Young's modulus of 630 to 1300 kg / mm 2.
And the heat shrinkage at 120 ° C. is 0.3 to 8.0%
And small ones.
【0081】これに対し、比較例1〜比較例3で得られ
た各PP繊維は、いずれも偏光下、クロスニコルの状態
で観察したときに暗部(構造変化領域)が認められない
ものであり、これらのPP繊維の繊維強度は7.4〜
9.4g/dと実施例1〜実施例5で得た各PP繊維の
繊維強度よりも大幅に低い値であった。On the other hand, each of the PP fibers obtained in Comparative Examples 1 to 3 had no dark part (structure change area) when observed in crossed Nicols under polarized light. The fiber strength of these PP fibers is 7.4 to
The value was 9.4 g / d, which was significantly lower than the fiber strength of each PP fiber obtained in Examples 1 to 5.
【0082】実施例6 紡糸速度を300m/分とした以外は実施例1(1)と
同条件で未延伸糸を作製し、延伸倍率を11倍,延伸速
度(繊維引き出し手段による延伸糸の引き出し速度を意
味する。以下同じ。)を100m/分とした以外は実施
例1(2)と同条件で当該未延伸糸を延伸して、目的と
するPP繊維を得た。このPP繊維を偏光下、クロスニ
コルの状態で顕微鏡観察したところ、実施例1で得たP
P繊維と同様の形態を示していた。Example 6 An undrawn yarn was produced under the same conditions as in Example 1 (1) except that the spinning speed was 300 m / min. The drawing ratio was 11 times, and the drawing speed (drawing of the drawn yarn by the fiber drawing means). The unstretched yarn was drawn under the same conditions as in Example 1 (2) except that the speed was changed to 100 m / min to obtain a target PP fiber. Microscopic observation of the PP fiber under crossed Nicols under polarized light revealed that the P fiber obtained in Example 1 was obtained.
It showed the same form as the P fiber.
【0083】実施例7 実施例6と同条件で未延伸糸を作製し、延伸倍率を8倍
とした以外は実施例6と同条件で当該未延伸糸を延伸し
て、目的とするPP繊維を得た。このPP繊維を偏光
下、クロスニコルの状態で顕微鏡観察したところ、実施
例6で得たPP繊維と同様の形態を示していた。Example 7 An unstretched yarn was produced under the same conditions as in Example 6, and the unstretched yarn was stretched under the same conditions as in Example 6 except that the stretching ratio was set to 8 times. I got Microscopic observation of the PP fiber under crossed Nicols under polarized light showed the same form as the PP fiber obtained in Example 6.
【0084】実施例8 実施例6と同条件で未延伸糸を作製し、加圧飽和水蒸気
の絶対圧を2.0kg/cm2 (温度は120℃),延
伸倍率を10倍とした以外は実施例6と同条件で当該未
延伸糸を延伸して、目的とするPP繊維を得た。なお、
このときの可能延伸倍率は10.5倍であった。上記の
PP繊維を偏光下、クロスニコルの状態で顕微鏡観察し
たところ、実施例6で得たPP繊維と同様の形態を示し
ていた。Example 8 An undrawn yarn was produced under the same conditions as in Example 6, except that the absolute pressure of pressurized saturated steam was 2.0 kg / cm 2 (temperature: 120 ° C.) and the draw ratio was 10 times. The undrawn yarn was drawn under the same conditions as in Example 6 to obtain a target PP fiber. In addition,
The possible stretching ratio at this time was 10.5 times. Microscopic observation of the above PP fiber under crossed Nicols under polarized light showed the same form as the PP fiber obtained in Example 6.
【0085】実施例9 実施例6と同条件で未延伸糸を作製し、加圧飽和水蒸気
の絶対圧を4.9kg/cm2 (温度は150℃),延
伸倍率を11.5倍とした以外は実施例6と同条件で当
該未延伸糸を延伸して、目的とするPP繊維を得た。な
お、このときの可能延伸倍率は11.5倍であった。上
記のPP繊維を偏光下、クロスニコルの状態で顕微鏡観
察したところ、実施例6で得たPP繊維と同様の形態を
示していた。Example 9 An undrawn yarn was produced under the same conditions as in Example 6, and the absolute pressure of pressurized saturated steam was set to 4.9 kg / cm 2 (temperature was 150 ° C.), and the draw ratio was set to 11.5 times. Except for the above, the undrawn yarn was drawn under the same conditions as in Example 6 to obtain a target PP fiber. The possible stretching ratio at this time was 11.5 times. Microscopic observation of the above PP fiber under crossed Nicols under polarized light showed the same form as the PP fiber obtained in Example 6.
【0086】実施例10 実施例6と同条件で未延伸糸の作製および当該未延伸糸
の延伸をそれぞれ行い、さらに、延伸に引き続いて油剤
処理および乾燥処理を順次行った後、ロータリーカッタ
ーを用いて繊維長5mmに切断して、ショートカットチ
ョップを得た。このとき、操業上、何等問題は生じなか
った。なお、上記のショートカットチョップは本発明の
PP繊維加工品の1である。Example 10 The production of an undrawn yarn and the drawing of the undrawn yarn were performed under the same conditions as in Example 6, and after the drawing, an oil agent treatment and a drying treatment were sequentially performed. And cut to a fiber length of 5 mm to obtain a shortcut chop. At this time, there were no operational problems. The above-mentioned shortcut chop is one of the processed PP fiber products of the present invention.
【0087】実施例11 (1)被延伸物(溶融紡糸糸)の作製 IPFが97%、Q値が3.2、MIが14であるアイ
ソタクチックPP(日本ポリケム社製のSA2D)を原
料として用い、ホール径が0.5mmφ、ホール数が1
20である紡糸ノズルを備えた溶融紡糸装置によって紡
糸温度250℃,紡糸速度200m/分の条件の下に溶
融紡糸を行って、単糸デニールが90dの溶融紡糸糸
(未延伸糸)を得た。Example 11 (1) Preparation of an Object to be Stretched (Molten Spun Yarn) An isotactic PP (IP2: 97%, Q value: 3.2, MI: 14) was used as a raw material. And the hole diameter is 0.5mmφ and the number of holes is 1
The melt spinning was performed by a melt spinning device having a spinning nozzle of No. 20 at a spinning temperature of 250 ° C. and a spinning speed of 200 m / min to obtain a melt spun yarn (undrawn yarn) having a single denier of 90d. .
【0088】(2)PP繊維(延伸糸)の製造 上記(1)で得た未延伸糸を36本合糸して繊維束を
得、実施例1(2)で用いたのと同様の延伸装置によっ
て前記の繊維束をトータルデニール30240dにまで
延伸した。このとき、加圧飽和水蒸気の絶対圧は4.2
kg/cm2 (温度は145℃)とし、延伸倍率は13
倍とし、延伸速度は60m/分とした。(2) Production of PP fiber (drawn yarn) 36 undrawn yarns obtained in the above (1) were combined to obtain a fiber bundle, and the same drawing as used in Example 1 (2) was performed. The fiber bundle was stretched to a total denier of 30240d by an apparatus. At this time, the absolute pressure of the pressurized saturated steam is 4.2
kg / cm 2 (temperature is 145 ° C.) and the stretching ratio is 13
And the stretching speed was 60 m / min.
【0089】(3)PP繊維加工品の製造 上記(1)で得た延伸糸を繊維束のまま更に搬送し、途
中、静電気の発生を防止するために仕上げ油剤を付与
し、水蒸気加熱によって80℃に加熱した後ただちに幅
10mmのスタフィングボックス型クリンパーで捲縮加
工を施した。そして、捲縮加工を施した後の繊維束をロ
ータリーカッターによって所定長に切断し、当該切断に
よって得られた短繊維を100℃で乾燥して、繊維長が
64mmのステープルファイバーを得た。このステープ
ルファイバーは本発明のPP繊維加工品の1つである。(3) Production of processed PP fiber product The drawn yarn obtained in the above (1) is further transported as a fiber bundle, and a finishing oil is applied on the way to prevent generation of static electricity. Immediately after heating to ° C., crimping was performed with a 10 mm wide stuffing box type crimper. The crimped fiber bundle was cut into a predetermined length by a rotary cutter, and the short fibers obtained by the cutting were dried at 100 ° C. to obtain staple fibers having a fiber length of 64 mm. This staple fiber is one of the processed PP fibers of the present invention.
【0090】参考例1 実施例6と同条件で未延伸糸を作製し、延伸倍率を5.
5倍とした以外は実施例6と同条件で当該未延伸糸を延
伸して、目的とするPP繊維を得た。上記のPP繊維を
偏光下、クロスニコルの状態で顕微鏡観察したところ、
暗部(構造変化領域)は殆ど認められなかった。Reference Example 1 An undrawn yarn was produced under the same conditions as in Example 6, and the draw ratio was set to 5.
The undrawn yarn was drawn under the same conditions as in Example 6 except that it was increased by a factor of 5, to obtain a target PP fiber. Microscopic observation of the above PP fiber under crossed Nicols under polarized light,
Almost no dark area (structure change area) was observed.
【0091】比較例4 実施例6と同条件で未延伸糸を作製し、加圧飽和水蒸気
の絶対圧を1.6kg/cm2 (温度は115℃),延
伸倍率を9.5倍とした以外は実施例6と同条件で当該
未延伸糸を延伸して、目的とするPP繊維を得た。な
お、このときの可能延伸倍率は10倍であった。上記の
PP繊維を偏光下、クロスニコルの状態で顕微鏡観察し
たところ、暗部(構造変化領域)は殆ど認められなかっ
た。Comparative Example 4 An undrawn yarn was produced under the same conditions as in Example 6, and the absolute pressure of pressurized saturated steam was 1.6 kg / cm 2 (temperature: 115 ° C.) and the draw ratio was 9.5. Except for the above, the undrawn yarn was drawn under the same conditions as in Example 6 to obtain a target PP fiber. The possible stretching ratio at this time was 10 times. Microscopic observation of the above PP fiber under crossed Nicols under polarized light showed almost no dark part (structure change area).
【0092】物性値等の測定II 実施例6〜実施例11,参考例1および比較例4でそれ
ぞれ得たPP繊維またはPP繊維加工品について、その
繊度(重量デニール),繊維強度,伸度,常温における
ヤング率,120℃におけるヤング率および120℃に
おける熱収縮率を前記「物性値等の測定I」におけるの
と同様にして測定した。これらの結果を、繊維原料とし
て用いたPPの物性値ならびに延伸媒体として用いた加
圧飽和水蒸気の温度および延伸倍率ととともに、表2に
示す。 Measurement of Physical Properties, etc. II The fineness (weight denier), fiber strength, elongation, and the like of the PP fiber or the processed PP fiber product obtained in each of Examples 6 to 11, Reference Example 1 and Comparative Example 4 were measured . The Young's modulus at room temperature, the Young's modulus at 120 ° C., and the heat shrinkage at 120 ° C. were measured in the same manner as in “Measurement of Physical Properties, etc. I”. These results are shown in Table 2 together with the physical property values of PP used as the fiber raw material, the temperature of the pressurized saturated steam used as the drawing medium, and the draw ratio.
【0093】[0093]
【表2】 [Table 2]
【0094】表2に示したように、実施例6〜実施例9
で得た各PP繊維および実施例10〜実施例11で得た
各PP繊維加工品は、50m/分よりも速い延伸速度の
下に得たものであるにも拘わらず、常温におけるヤング
率が850〜1300kg/mm2 と高く、かつ、12
0℃における熱収縮率が0.5〜3.4%と低い。さら
に、これらのPP繊維およびPP繊維加工品は、120
℃という高温下においても510〜680kg/mm2
という高いヤング率を有しており、その繊維強度は1
1.6〜13.2g/dと高い。As shown in Table 2, Examples 6 to 9
Although the PP fibers obtained in the above and the processed PP fiber products obtained in Examples 10 to 11 were obtained under a drawing speed higher than 50 m / min, their Young's modulus at room temperature was 850 to 1300 kg / mm 2 as high as 12
The heat shrinkage at 0 ° C. is as low as 0.5 to 3.4%. Furthermore, these PP fibers and PP fiber processed products have 120
510 kg / mm 2 even at high temperature of ℃
Has a high Young's modulus, and its fiber strength is 1
It is as high as 1.6 to 13.2 g / d.
【0095】参考例1で得たPP繊維は、本発明の延伸
方法によって得られたものの1つではあるが、比較例2
で得たPP繊維との比較から明らかなように、物性の向
上は実質的に認められない。これは、延伸倍率が5.5
倍と低い(比較例2では6.3倍)ことに起因している
ものと推察される。しかしながら、実施例4から類推さ
れるように、延伸倍率を高めれば当該PP繊維の物性は
飛躍的に向上する。したがって、本発明の方法によって
物性が向上した延伸物を得るためには、被延伸物の材質
に応じて延伸倍率を適宜所定の値より大きくすることが
必要である。The PP fiber obtained in Reference Example 1 was one of the fibers obtained by the drawing method of the present invention.
As is clear from the comparison with the PP fiber obtained in the above, substantially no improvement in the physical properties is recognized. This means that the draw ratio is 5.5
It is presumed to be due to the fact that it is twice as low (6.3 times in Comparative Example 2). However, as inferred from Example 4, increasing the draw ratio dramatically improves the physical properties of the PP fiber. Therefore, in order to obtain a stretched material having improved physical properties by the method of the present invention, it is necessary to appropriately increase the stretching ratio according to the material of the stretched object.
【0096】また、比較例4で得たPP繊維は比較的高
い繊維強度を有してはいるものの、実施例1〜実施例1
1で得た各PP繊維と比べるとその値はまだまだ低い。
9.5倍という比較的高い延伸倍率で延伸しているにも
拘わらず繊維強度の向上が小さいのは、延伸温度が11
5℃と低いことに起因しているものと推察される。Further, although the PP fiber obtained in Comparative Example 4 has a relatively high fiber strength, Examples 1 to 1
The value is still lower than each PP fiber obtained in 1.
Despite the fact that the fiber was stretched at a relatively high draw ratio of 9.5 times, the improvement in fiber strength was small because the stretching temperature was 11
It is presumed to be due to the low temperature of 5 ° C.
【0097】実施例12 実施例1(1)と同条件で未延伸糸を作製し、加圧飽和
水蒸気の絶対圧を5.7kg/cm2 (温度は155
℃),延伸倍率を8倍,延伸糸の引き出し速度(延伸速
度)を420m/分とした以外は実施例1(2)と同条
件で当該未延伸糸を延伸して、目的とするPP繊維を得
た。Example 12 An undrawn yarn was produced under the same conditions as in Example 1 (1), and the absolute pressure of the saturated steam under pressure was 5.7 kg / cm 2 (temperature was 155
° C), the draw ratio was 8 times, and the undrawn yarn was drawn under the same conditions as in Example 1 (2) except that the drawing speed (drawing speed) of the drawn yarn was 420 m / min. I got
【0098】実施例13 延伸倍率を9倍,延伸糸の引き出し速度(延伸速度)を
200m/分とした以外は実施例12と同条件の下に、
目的とするPP繊維を得た。Example 13 Under the same conditions as in Example 12, except that the draw ratio was 9 times and the drawing speed of the drawn yarn (drawing speed) was 200 m / min.
The desired PP fiber was obtained.
【0099】物性値等の測定III 実施例12〜実施例13でそれぞれ得たPP繊維につい
て、その繊度(重量デニール),繊維強度,常温におけ
るヤング率,伸度および120℃における熱収縮率を前
記「物性値等の測定I」におけるのと同様にして測定し
た。これらの結果を表3に示す。 Measurement of Physical Properties, etc. III Regarding the PP fibers obtained in Examples 12 to 13, their fineness (denier by weight), fiber strength, Young's modulus at normal temperature, elongation, and heat shrinkage at 120 ° C. were as described above. The measurement was carried out in the same manner as in "Measurement I of Physical Properties". Table 3 shows the results.
【0100】[0100]
【表3】 [Table 3]
【0101】表3に示したように、実施例12〜実施例
13では延伸媒体として155℃という高温の加圧飽和
水蒸気を用いたので、これらの実施例で得たPP繊維
は、420m/分または200m/分という極めて速い
延伸速度の下に得たものであるにも拘わらず、11.0
g/dまたは12.1g/dという高い繊維強度を有し
ていると共に、650kg/mm2 または830kg/
mm2 という高いヤング率を有している。また、これら
のPP繊維は、120℃における熱収縮率が1.0%ま
たは0.8%と小さいものである。As shown in Table 3, in Examples 12 and 13, pressurized saturated steam having a high temperature of 155 ° C. was used as a stretching medium, so that the PP fiber obtained in these Examples was 420 m / min. Or 11.0 despite being obtained at an extremely high stretching speed of 200 m / min.
g / d or 12.1 g / d and a fiber strength of 650 kg / mm 2 or 830 kg / d.
It has a high Young's modulus of mm 2 . Further, these PP fibers have a small heat shrinkage at 120 ° C. of 1.0% or 0.8%.
【0102】実施例14〜実施例17 実施例1で用いたアイソタクチックPPと同じアイソタ
クチックPPを繊維原料として用い、表4に示した紡糸
条件で当該アイソタクチックPPを溶融紡糸して繊度が
52dの未延伸糸を作製した後、延伸倍率を表4に示す
倍率とした以外は実施例1(2)と同条件で前記の未延
伸糸を延伸して、目的とするPP繊維を実施例毎に得
た。Examples 14 to 17 The same isotactic PP as used in Example 1 was melt-spun under the spinning conditions shown in Table 4 using the same isotactic PP as a fiber raw material. After preparing an undrawn yarn having a fineness of 52d, the undrawn yarn was drawn under the same conditions as in Example 1 (2) except that the draw ratio was set to the ratio shown in Table 4, to obtain a target PP fiber. Obtained for each example.
【0103】実施例18〜実施例20 実施例1で用いたアイソタクチックPPと同じアイソタ
クチックPPを繊維原料として用い、表5に示すように
当該アイソタクチックPPを実施例1(1)と同じ条件
で溶融紡糸して繊度が25dの未延伸糸を作製した後、
延伸倍率を表5に示す倍率とした以外は実施例1(2)
と同様にして前記の未延伸糸を延伸して、目的とするP
P繊維を実施例毎に得た。なお、実施例20で得たPP
繊維は、実施例1で得たPP繊維と同じものである。Examples 18 to 20 The same isotactic PP as used in Example 1 was used as a fiber raw material, and as shown in Table 5, the isotactic PP was used in Example 1 (1). After melt-spinning under the same conditions as above to produce an undrawn yarn with a fineness of 25d,
Example 1 (2) except that the stretching ratio was set to the ratio shown in Table 5.
The undrawn yarn is drawn in the same manner as in
P fibers were obtained for each example. The PP obtained in Example 20
The fibers are the same as the PP fibers obtained in Example 1.
【0104】比較例5 実施例14〜実施例17と同条件で溶融紡糸を行って繊
度が52dの未延伸糸を作製した後、120℃に加熱し
た熱ロールを用いて前記の未延伸糸を6倍に延伸して、
PP繊維を得た。Comparative Example 5 An undrawn yarn having a fineness of 52d was prepared by performing melt spinning under the same conditions as in Examples 14 to 17, and then the undrawn yarn was heated using a hot roll heated to 120 ° C. Stretched 6 times,
A PP fiber was obtained.
【0105】比較例6 実施例1と同条件で溶融紡糸を行って繊度が25dの未
延伸糸を作製した後、120℃に加熱した熱ロールを用
いて前記の未延伸糸を4倍に延伸して、PP繊維を得
た。Comparative Example 6 Unstretched yarn having a fineness of 25 d was prepared by melt spinning under the same conditions as in Example 1, and the unstretched yarn was stretched 4 times using a hot roll heated to 120 ° C. Thus, a PP fiber was obtained.
【0106】物性値等の測定IV 実施例14〜実施例20および比較例5〜比較例6でそ
れぞれ得たPP繊維について、その繊度(重量デニー
ル),繊維強度,伸度,常温におけるヤング率,および
120℃における熱収縮率を前記「物性値等の測定I」
におけるのと同様にして測定した。また、140℃のオ
ーブンを用いた以外は前記「物性値等の測定I」におけ
るのと同様にして140℃における熱収縮率を測定し
た。 Measurement of Physical Properties, etc. IV For the PP fibers obtained in Examples 14 to 20 and Comparative Examples 5 to 6, their fineness (denier by weight), fiber strength, elongation, Young's modulus at room temperature, And the heat shrinkage at 120 ° C. were determined by the above-mentioned “Measurement of physical property values I”.
The measurement was carried out in the same manner as described above. The heat shrinkage at 140 ° C. was measured in the same manner as in “Measurement of Physical Properties, etc. I” except that an oven at 140 ° C. was used.
【0107】さらに、各PP繊維について以下の要領で
結晶化度および110面の結晶サイズを測定した。 (a) 結晶化度 X線回折装置(島津製作所社製のXD−3A型、X線
管:Cu陽極)を用いて、走査範囲26〜10°(2
θ),走査速度1/4°min-1 ,時定数10sec ,試料
の回転速度57rpm,チャートスピード5mm/min
の条件の下にX線回折曲線を作製し、このX線回折曲線
から作図法によって回折ピークの山分けをした後、ナッ
タ(Natta)の方法によって結晶化度を算出した。 (b) 110面の結晶サイズ 半価幅法によって求めた。上記の物性値等の測定結果
を、表4または表5に併記する。Further, the crystallinity and the crystal size of the 110 plane were measured for each PP fiber in the following manner. (a) Crystallinity Using a X-ray diffractometer (XD-3A type, manufactured by Shimadzu Corporation, X-ray tube: Cu anode), a scanning range of 26 to 10 ° (2
θ), scanning speed 1/4 ° min -1 , time constant 10 sec, sample rotation speed 57 rpm, chart speed 5 mm / min
An X-ray diffraction curve was prepared under the conditions described above, and diffraction peaks were divided from this X-ray diffraction curve by a drawing method, and then the crystallinity was calculated by the method of Natta. (b) Crystal size of 110 plane It was determined by the half width width method. The measurement results of the above physical properties and the like are also shown in Table 4 or Table 5.
【0108】耐薬品性の評価 実施例14〜実施例20および比較例5〜比較例6でそ
れぞれ得たPP繊維から長さ40mm以上の試料を切り
出し、液温を100°に保った所定の芳香族有機溶剤、
すなわち、キシレン,トルエン,モノクロルベンゼン,
o−ジクロルベンゼンまたは1,2,4−トリクロルベ
ンゼンに前記の試料を15分間浸漬した後にその形態を
目視により観察して、当該試料の耐薬品性を評価した。
また、参考として、61%硝酸水溶液,30%過酸化水
素水,次亜塩素酸ソーダ溶液および市販の食用油(菜種
油と大豆油の混合物)に対する耐薬品性も評価した。こ
れらの評価結果を表4または表5に併記する。 Evaluation of Chemical Resistance A sample having a length of 40 mm or more was cut out from the PP fibers obtained in Examples 14 to 20 and Comparative Examples 5 to 6, and a predetermined fragrance was maintained at a liquid temperature of 100 °. Group organic solvent,
That is, xylene, toluene, monochlorobenzene,
After immersing the sample in o-dichlorobenzene or 1,2,4-trichlorobenzene for 15 minutes, the form was visually observed to evaluate the chemical resistance of the sample.
For reference, the chemical resistance to a 61% aqueous nitric acid solution, a 30% aqueous hydrogen peroxide solution, a sodium hypochlorite solution, and a commercially available edible oil (a mixture of rapeseed oil and soybean oil) was also evaluated. These evaluation results are also shown in Table 4 or Table 5.
【0109】[0109]
【表4】 [Table 4]
【0110】[0110]
【表5】 [Table 5]
【0111】表4または表5に示したように、実施例1
4〜実施例20で得た各PP繊維は高い繊維強度を有す
ると共に高いヤング率を有している。さらに、これらの
PP繊維は、液温100℃という高温度環境下において
も前述した芳香族有機溶剤に対して高い耐薬品性を有し
ている。一方、未延伸糸を熱ロール法によって延伸する
ことにより得た比較例5〜比較例6の各PP繊維は、実
施例14〜実施例20で得たいずれのPP繊維と比べて
も繊維強度に劣ると共に、そのヤング率も小さい。さら
に、これらの比較例で得た各PP繊維は、キシレン,ト
ルエンおよびモノクロルベンゼンそれぞれに対する耐薬
品性が実施例14〜実施例20で得た各PP繊維に比べ
て大幅に劣る。As shown in Table 4 or Table 5, Example 1
Each of the PP fibers obtained in Examples 4 to 20 has high fiber strength and high Young's modulus. Further, these PP fibers have high chemical resistance to the above-mentioned aromatic organic solvents even under a high temperature environment of a liquid temperature of 100 ° C. On the other hand, each PP fiber of Comparative Examples 5 to 6 obtained by stretching an undrawn yarn by the hot roll method has a fiber strength higher than any of the PP fibers obtained in Examples 14 to 20. It is inferior and its Young's modulus is small. Furthermore, each PP fiber obtained in these comparative examples is significantly inferior in chemical resistance to each of xylene, toluene and monochlorobenzene as compared with each PP fiber obtained in Examples 14 to 20.
【0112】[0112]
【発明の効果】以上説明したように、本発明の延伸方法
によれば従来の延伸方法による場合よりも被延伸物を大
きく変形させることが可能になり、これによって従来よ
りもより好ましい物性を有している延伸物を得ることが
可能になる。また、被延伸物を従来と同量変形させた場
合でも、より好ましい物性を有している延伸物を得るこ
とが可能になる。したがって、本発明によれば信頼性や
耐久性等が向上した延伸物を工業的に生産することが容
易になる。As described above, according to the stretching method of the present invention, the object to be stretched can be deformed more than in the case of the conventional stretching method. It is possible to obtain a stretched product. Further, even when the object to be stretched is deformed by the same amount as the conventional one, a stretched object having more preferable physical properties can be obtained. Therefore, according to the present invention, it becomes easy to industrially produce a stretched product having improved reliability and durability.
【図1】実施例1で得たPP繊維を偏光下、クロスニコ
ルの状態で観察したときの拡大顕微鏡写真(×400
倍)の写しである。FIG. 1 is an enlarged micrograph (× 400) of the PP fiber obtained in Example 1 observed in crossed Nicols under polarized light.
Double).
【図2】本発明の延伸物の1つであるPP繊維について
本明細書でいう「暗部を横断するようにして繊維径方向
に伸びている線状の明部」の形態を説明するために、当
該PPを模式的に示している図である。FIG. 2 is a view for explaining a form of “a linear light portion extending in a fiber radial direction so as to cross a dark portion” in the present specification for a PP fiber which is one of the drawn products of the present invention. It is a figure which shows the said PP typically.
【図3】本発明の延伸物の1つであるPP繊維について
本明細書でいう「構造変化領域の長さ分率fc」の測定
方法を説明するために、当該PP繊維を模式的に示して
いる図である。FIG. 3 schematically shows a PP fiber, which is one of the drawn products of the present invention, to explain a method of measuring the “length fraction fc of the structure-change region” referred to in the present specification. FIG.
1…PP繊維、 2…暗部(構造変化領域)、 3a,
3b,3c…暗部を横断するようにして繊維径方向に伸
びている線状の明部、 4…繊維外周部。1 ... PP fiber, 2 ... dark part (structure change area), 3a,
3b, 3c: a linear light portion extending in the fiber radial direction so as to cross the dark portion;
Claims (22)
物導入孔と内部に送り込まれた前記の被延伸物が延伸さ
れたことによって生じた延伸物を引き出すための延伸物
引き出し孔とを有する気密性の容器内に、延伸媒体とし
て絶対圧が2.0kg/cm2 以上の加圧飽和水蒸気を
充填して延伸槽とし、 該延伸槽における前記の被延伸物導入孔および前記の延
伸物引き出し孔から加圧飽和水蒸気が漏出することをそ
れぞれ加圧水を利用して防止するとともに、 前記の被延伸物導入孔から加圧飽和水蒸気が漏出するこ
とを防止している加圧水中に被延伸物を導き、被延伸物
の表面に水分が付着した後、該被延伸物を前記の被延伸
物導入孔から延伸槽内に導いて延伸し、 その後、前記の延伸物引き出し孔から引き出された延伸
物を、前記の延伸物引き出し孔から加圧飽和水蒸気が漏
出することを防止している加圧水中に導いて冷却する、 ことを特徴とする延伸方法。A drawing object introduction hole for feeding a drawing object into the inside and a drawing object drawing hole for drawing out a drawing material generated by stretching the drawing object fed into the inside. A stretched tank is filled with a pressurized saturated steam having an absolute pressure of 2.0 kg / cm 2 or more as a stretching medium in a hermetically sealed container having a stretched medium. Each of the pressurized water is used to prevent leakage of pressurized saturated steam from the outlet hole, and the object to be stretched is placed in pressurized water preventing leakage of pressurized saturated steam from the object introduction hole. After the water is adhered to the surface of the object to be stretched, the object to be stretched is guided into the stretching tank from the introduction hole for the object to be stretched and stretched. The above-mentioned stretched material Stretching method pressurized saturated water vapor from the out hole cools led into the pressurized water is prevented from leaking, it is characterized.
物導入孔および内部に送り込まれた前記の被延伸物が延
伸されたことによって生じた延伸物を引き出すための延
伸物引き出し孔を有する気密性の容器内に延伸媒体とし
ての加圧飽和水蒸気が充填されている延伸槽部と、該延
伸槽部における前記の被延伸物導入孔側に密接配置され
ている第1の加圧水槽部と、前記の延伸槽部における延
伸物引き出し孔側に密接配置されている第2の加圧水槽
部と、前記第1の加圧水槽部の外側から該第1の加圧水
槽部内,前記の被延伸物導入孔,前記の延伸槽部内,前
記の延伸物引き出し孔および前記第2の加圧水槽部内を
経由して前記第2の加圧水槽の外へ被延伸物乃至は延伸
物を導くことができるように前記第1の加圧水槽部およ
び前記第2の加圧水槽部それぞれに形成されている透孔
と、前記第1の加圧水槽部内に被延伸物を送り込むため
の被延伸物送出手段と、該被延伸物送出手段による被延
伸物の送り込み速度よりも高速で前記第2の加圧水槽部
から延伸物を引き出すための延伸物引き出し手段とを有
している延伸装置を用いる、請求項1に記載の方法。2. A stretched object introduction hole for feeding the stretched object into the inside, and a stretched object drawing hole for pulling out a stretched material generated by stretching the stretched object sent into the inside. A stretching tank section filled with pressurized saturated steam as a stretching medium in an airtight container, and a first pressurized water tank section which is closely arranged on the stretched object introduction hole side of the stretching tank section. A second pressurized water tank portion closely disposed on the stretched product drawing hole side of the stretched tank portion, and introducing the object to be stretched into the first pressurized water tank portion from outside the first pressurized water tank portion. The object to be stretched or the stretched material can be guided to the outside of the second pressurized water tank via the hole, the inside of the stretch tank, the drawn-out hole of the stretched material, and the inside of the second pressurized water tank. A first pressurized water tank and the second pressurized water A through-hole formed in each of the tank portions, a stretched object sending means for feeding the stretched object into the first pressurized water tank portion, and a speed higher than the feeding speed of the stretched object by the stretched object sending means. The method according to claim 1, wherein a stretching device having a stretched material drawing means for drawing out a stretched material from the second pressurized water tank section is used.
ける第1の加圧水槽部および第2の加圧水槽部それぞれ
の外側に、前記第1の加圧水槽部に形成されている透孔
または前記第2の加圧水槽部に形成されている透孔を水
没させることによって該透孔から前記第1の加圧水槽部
内または前記第2の加圧水槽部内の水が漏出することを
緩和させるための緩衝水槽部が設けられている延伸装置
を用いる、請求項2に記載の方法。3. The through-hole formed in the first pressurized water tank section outside the first pressurized water tank section and the second pressurized water tank section in the stretching apparatus according to claim 2. A buffer water tank for alleviating leakage of water in the first pressurized water tank section or the second pressurized water tank section from the through hole by submerging a through hole formed in the second pressurized water tank section. 3. The method according to claim 2, wherein a stretching device provided with a section is used.
物を用い、該未延伸物を延伸して延伸物を得る、請求項
1〜請求項3のいずれか1項に記載の方法。4. The method according to claim 1, wherein an unstretched product made of a crystalline polymer is used as an object to be stretched, and the unstretched material is stretched to obtain a stretched product. .
延伸糸を用い、該未延伸糸を延伸してポリプロピレン繊
維を得る、請求項1〜請求項4のいずれか1項に記載の
方法。5. The method according to claim 1, wherein an undrawn yarn of a polypropylene fiber is used as an object to be drawn, and the undrawn yarn is drawn to obtain a polypropylene fiber.
加圧飽和水蒸気中で延伸する、請求項5に記載の方法。6. The method according to claim 5, wherein the stretching is performed in pressurized saturated steam having an absolute pressure of 3.0 to 5.0 kg / cm 2 .
5または請求項6に記載の方法。7. The method according to claim 5, wherein the object to be stretched is stretched 6 times or more.
るポリプロピレン繊維の未延伸糸を延伸して、偏光下、
クロスニコルの状態で観察したときに、繊維内部が暗部
として視認されると共に該暗部を横断するようにして繊
維径方向に伸びている線状の明部が断続的に視認される
ポリプロピレン繊維を得る、請求項5〜請求項7のいず
れか1項に記載の方法。8. An undrawn yarn of a polypropylene fiber composed of isotactic polypropylene is drawn and, under polarized light,
When observed in a crossed Nicols state, a polypropylene fiber is obtained in which the inside of the fiber is visually recognized as a dark part and the linear light part extending in the fiber radial direction is intermittently visible so as to cross the dark part. The method according to any one of claims 5 to 7.
ときに暗部として視認される繊維内部の全長をSとし、
繊維長をLとしたときに、前記の繊維長Lに占める前記
暗部として視認される繊維内部の全長Sの百分率(S/
L)×100(%)が60%以上であるポリプロピレン
繊維を得る、請求項8に記載の方法。9. The total length inside the fiber, which is visually recognized as a dark portion when observed in a crossed Nicols state under polarized light, is represented by S,
Assuming that the fiber length is L, the percentage (S /
The method according to claim 8, wherein a polypropylene fiber having L) × 100 (%) of 60% or more is obtained.
が600kg/mm2以上のポリプロピレン繊維を得
る、請求項5〜請求項9のいずれか1項に記載の方法。10. The method according to claim 5, wherein a polypropylene fiber having a fiber strength of 11 g / d or more and a Young's modulus of 600 kg / mm 2 or more is obtained.
2 以上で、120℃における熱収縮率が5%未満のポリ
プロピレン繊維を得る、請求項8〜請求項10のいずれ
か1項に記載の方法。11. The Young's modulus at room temperature is 800 kg / mm.
The method according to any one of claims 8 to 10, wherein a polypropylene fiber having a heat shrinkage at 120 ° C of 2 or more and less than 5% is obtained.
g/mm2 以上のポリプロピレン繊維を得る、請求項8
〜請求項11のいずれか1項に記載の方法。12. The Young's modulus at 120 ° C. is 500 k.
9. A polypropylene fiber having a g / mm 2 or more is obtained.
The method according to claim 11.
ずれかに記載の方法によって延伸して得たものであるこ
とを特徴とする延伸物。13. A stretched article obtained by stretching an article to be stretched by the method according to claim 1. Description:
3に記載の延伸物。14. The method according to claim 1, which is a polypropylene fiber.
3. The stretched product according to 3.
なり、偏光下、クロスニコルの状態で観察したときに、
繊維内部が暗部として視認されると共に該暗部を横断す
るようにして繊維径方向に伸びている線状の明部が断続
的に視認されるポリプロピレン繊維である、請求項14
に記載の延伸物。15. When made of isotactic polypropylene and observed in crossed Nicols under polarized light,
The polypropylene fiber in which the inside of the fiber is visually recognized as a dark part, and the linear light part extending in the fiber radial direction so as to cross the dark part is intermittently visible.
Stretched product described in 1.
たときに暗部として視認される繊維内部の全長をSと
し、繊維長をLとしたときに、前記繊維長Lに占める前
記暗部として視認される繊維内部の全長Sの百分率(S
/L)×100(%)が60%以上のポリプロピレン繊
維である、請求項15に記載の延伸物。16. When the entire length inside the fiber, which is visually recognized as a dark portion when observed in a crossed Nicols state under polarized light, is S and the fiber length is L, the dark portion occupies the fiber length L. Of the total length S inside the fiber (S
The drawn product according to claim 15, wherein (L) x 100 (%) is a polypropylene fiber of 60% or more.
が600kg/mm2以上のポリプロピレン繊維であ
る、請求項14〜請求項16のいずれか1項に記載の延
伸物。17. The stretched product according to claim 14, which is a polypropylene fiber having a fiber strength of 11 g / d or more and a Young's modulus of 600 kg / mm 2 or more.
5〜100%でQ値が4未満であるアイソタクチックポ
リプロピレンからなり、常温時のヤング率が800kg
/mm2 以上で120℃における熱収縮率が5%未満の
ポリプロピレン繊維である、請求項15〜請求項17の
いずれか1項に記載の延伸物。18. An isotactic pendant fraction of 9
Made of isotactic polypropylene having a Q value of less than 4 at 5 to 100%, and a Young's modulus at room temperature of 800 kg
The stretched product according to any one of claims 15 to 17, wherein the stretched product is a polypropylene fiber having a heat shrinkage ratio of not less than 5% at 120 ° C at not less than / mm 2 .
5〜100%でQ値が4未満であるアイソタクチックポ
リプロピレンからなり、120℃におけるヤング率が5
00kg/mm2 以上のポリプロピレン繊維である、請
求項15〜請求項18のいずれか1項に記載の延伸物。19. An isotactic pendant fraction of 9
It consists of isotactic polypropylene having a Q value of less than 4 at 5 to 100%, and has a Young's modulus of 5 at 120 ° C.
It is 00kg / mm 2 or more polypropylene fibers, stretched product according to any one of claims 15 to claim 18.
なり、キシレン,トルエンおよびモノクロロベンゼンの
いずれかの芳香族有機溶剤に対し、該芳香族有機溶剤の
液温100℃,浸漬時間15分の条件の下に浸漬しても
溶解せずに繊維形態を維持しているだけの耐薬品性を有
している、請求項14に記載のポリプロピレン繊維。20. An aromatic organic solvent made of isotactic polypropylene and immersed in any of xylene, toluene and monochlorobenzene under the conditions of a liquid temperature of the aromatic organic solvent of 100 ° C. and an immersion time of 15 minutes. The polypropylene fiber according to claim 14, which has chemical resistance enough to maintain the fiber morphology without dissolving even when the fiber morphology is maintained.
20に記載のポリプロピレン繊維。21. The polypropylene fiber according to claim 20, which has a crystallinity of 70% or more.
記載のポリプロピレン繊維を材料繊維とし、フィラメン
ト,ショートカットチョップおよびステープルファイバ
ーのいずれかの繊維形態を有することを特徴とするポリ
プロピレン繊維加工品。22. A processed polypropylene fiber product, wherein the polypropylene fiber according to any one of claims 14 to 21 is used as a material fiber, and has a fiber form of any of a filament, a short cut chop and a staple fiber.
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10154242A JP3130288B2 (en) | 1997-10-24 | 1998-06-03 | Stretching method and stretched product |
DK99901114T DK0987356T3 (en) | 1998-03-31 | 1999-01-20 | Method of drawing |
DE69941418T DE69941418D1 (en) | 1998-03-31 | 1999-01-20 | ZIEHVVERFAHREN |
TW088100827A TW436415B (en) | 1998-03-31 | 1999-01-20 | Drawing method and drawn material |
KR10-1999-7011144A KR100394131B1 (en) | 1998-03-31 | 1999-01-20 | Drawing method and drawn material |
EP99901114A EP0987356B1 (en) | 1998-03-31 | 1999-01-20 | Drawing method |
US09/424,717 US6203902B1 (en) | 1998-03-31 | 1999-01-20 | Drawing method and drawn material |
CNB998008710A CN1160492C (en) | 1998-03-31 | 1999-01-20 | Drawing method and drawn material |
PCT/JP1999/000178 WO1999050490A1 (en) | 1998-03-31 | 1999-01-20 | Drawing method and drawn material |
US09/699,492 US6544462B1 (en) | 1998-03-31 | 2000-10-31 | Drawing method |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29274597 | 1997-10-24 | ||
JP8558498 | 1998-03-31 | ||
JP10-85584 | 1998-03-31 | ||
JP9-292745 | 1998-03-31 | ||
JP10154242A JP3130288B2 (en) | 1997-10-24 | 1998-06-03 | Stretching method and stretched product |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11350283A true JPH11350283A (en) | 1999-12-21 |
JP3130288B2 JP3130288B2 (en) | 2001-01-31 |
Family
ID=27304905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10154242A Expired - Fee Related JP3130288B2 (en) | 1997-10-24 | 1998-06-03 | Stretching method and stretched product |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3130288B2 (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002180330A (en) * | 2000-12-14 | 2002-06-26 | Ube Nitto Kasei Co Ltd | Stretched conjugated fiber |
JP2002180347A (en) * | 2000-10-04 | 2002-06-26 | Ube Nitto Kasei Co Ltd | Method for producing oriented product of crystalline polymer |
JP2003049318A (en) * | 2001-08-03 | 2003-02-21 | Ube Nitto Kasei Co Ltd | Method for producing drawn crystalline polymeric material |
JP2003293216A (en) * | 2002-03-29 | 2003-10-15 | Chisso Corp | High-strength polyolefin fiber and concrete molded form using the same |
JP2003328233A (en) * | 2002-05-08 | 2003-11-19 | Ube Nitto Kasei Co Ltd | Polyolefin-based drawn conjugate fiber and nonwoven fabric obtained from the same |
JP2005502577A (en) * | 2001-09-10 | 2005-01-27 | スリーエム イノベイティブ プロパティズ カンパニー | Reinforced fiber reinforced cement composite |
WO2007086425A1 (en) * | 2006-01-26 | 2007-08-02 | Mitsui Chemicals, Inc. | Adhesive and layered product made with the same |
JP2008266872A (en) * | 2007-03-27 | 2008-11-06 | Kuraray Co Ltd | Polypropylene yarn |
JP2013227719A (en) * | 2004-11-05 | 2013-11-07 | Innegrity Llc | Method for forming melt-spun multifilament polyolefin yarn and yarn formed therefrom |
WO2014203880A1 (en) * | 2013-06-21 | 2014-12-24 | 三菱レイヨン株式会社 | Process for manufacturing carbon-fiber precursor acrylic fiber bundle and steam drawing apparatus |
WO2017209283A1 (en) * | 2016-06-02 | 2017-12-07 | 株式会社プライムポリマー | Stretched fibers formed from polypropylene |
WO2020100654A1 (en) | 2018-11-13 | 2020-05-22 | 日本バイリーン株式会社 | Non-woven fabric and separator for electrochemical elements |
WO2023074268A1 (en) * | 2021-10-28 | 2023-05-04 | 東洋紡株式会社 | High-strength, high-elongation polypropylene fiber and production method thereof |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8647741B2 (en) | 2007-03-26 | 2014-02-11 | Kuraray Co., Ltd. | Polypropylene fiber, method of producing the same and utilization of the same |
EP2138221B1 (en) * | 2007-03-29 | 2014-10-01 | Toray Industries, Inc. | Filter medium and filter unit |
WO2012164656A1 (en) * | 2011-05-30 | 2012-12-06 | トヨタ自動車株式会社 | High-strength polypropylene fiber and method for producing same |
KR101713714B1 (en) | 2015-06-29 | 2017-03-22 | 현대자동차주식회사 | Thermoplastic resin composite and preparation method thereof |
-
1998
- 1998-06-03 JP JP10154242A patent/JP3130288B2/en not_active Expired - Fee Related
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4540083B2 (en) * | 2000-10-04 | 2010-09-08 | 宇部日東化成株式会社 | Method for producing polypropylene-based drawn fiber |
JP2002180347A (en) * | 2000-10-04 | 2002-06-26 | Ube Nitto Kasei Co Ltd | Method for producing oriented product of crystalline polymer |
JP4544600B2 (en) * | 2000-12-14 | 2010-09-15 | 宇部日東化成株式会社 | Drawn composite fiber |
JP2002180330A (en) * | 2000-12-14 | 2002-06-26 | Ube Nitto Kasei Co Ltd | Stretched conjugated fiber |
JP2003049318A (en) * | 2001-08-03 | 2003-02-21 | Ube Nitto Kasei Co Ltd | Method for producing drawn crystalline polymeric material |
JP4641367B2 (en) * | 2001-08-03 | 2011-03-02 | 宇部日東化成株式会社 | Method for producing crystalline polymer stretched product |
JP2005502577A (en) * | 2001-09-10 | 2005-01-27 | スリーエム イノベイティブ プロパティズ カンパニー | Reinforced fiber reinforced cement composite |
JP2003293216A (en) * | 2002-03-29 | 2003-10-15 | Chisso Corp | High-strength polyolefin fiber and concrete molded form using the same |
JP2003328233A (en) * | 2002-05-08 | 2003-11-19 | Ube Nitto Kasei Co Ltd | Polyolefin-based drawn conjugate fiber and nonwoven fabric obtained from the same |
JP2013227719A (en) * | 2004-11-05 | 2013-11-07 | Innegrity Llc | Method for forming melt-spun multifilament polyolefin yarn and yarn formed therefrom |
WO2007086425A1 (en) * | 2006-01-26 | 2007-08-02 | Mitsui Chemicals, Inc. | Adhesive and layered product made with the same |
JPWO2007086425A1 (en) * | 2006-01-26 | 2009-06-18 | 三井化学株式会社 | Adhesive and laminate using the same |
US8563138B2 (en) | 2006-01-26 | 2013-10-22 | Mitsui Chemicals Inc. | Adhesive and laminate made with the same |
JP2008266872A (en) * | 2007-03-27 | 2008-11-06 | Kuraray Co Ltd | Polypropylene yarn |
WO2014203880A1 (en) * | 2013-06-21 | 2014-12-24 | 三菱レイヨン株式会社 | Process for manufacturing carbon-fiber precursor acrylic fiber bundle and steam drawing apparatus |
JP5831638B2 (en) * | 2013-06-21 | 2015-12-09 | 三菱レイヨン株式会社 | Method for producing carbon fiber precursor acrylic fiber bundle and steam drawing apparatus |
US10604871B2 (en) | 2013-06-21 | 2020-03-31 | Mitsubishi Chemical Corporation | Process for steam drawing carbon-fiber precursor acrylic fiber bundle |
WO2017209283A1 (en) * | 2016-06-02 | 2017-12-07 | 株式会社プライムポリマー | Stretched fibers formed from polypropylene |
JPWO2017209283A1 (en) * | 2016-06-02 | 2019-04-04 | 株式会社プライムポリマー | Polypropylene drawn fiber |
WO2020100654A1 (en) | 2018-11-13 | 2020-05-22 | 日本バイリーン株式会社 | Non-woven fabric and separator for electrochemical elements |
WO2023074268A1 (en) * | 2021-10-28 | 2023-05-04 | 東洋紡株式会社 | High-strength, high-elongation polypropylene fiber and production method thereof |
Also Published As
Publication number | Publication date |
---|---|
JP3130288B2 (en) | 2001-01-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3130288B2 (en) | Stretching method and stretched product | |
EP0636716B1 (en) | Water soluble polyvinyl alcohol-based fiber | |
JP3595846B2 (en) | Polyketone fiber and method for producing the same | |
EP0213208B1 (en) | Polyethylene multifilament yarn | |
JP2004218189A (en) | Polyketone processed cord and method for producing the same | |
CN1115342A (en) | High-strength ultra-fine fiber construction, method for producing the same and high-strength conjugate fiber | |
US3608024A (en) | Method for producing crimped conjugated split fiber | |
KR100394131B1 (en) | Drawing method and drawn material | |
JP3704015B2 (en) | Polyketone fiber and method for producing the same | |
JP4544600B2 (en) | Drawn composite fiber | |
US7108912B2 (en) | Polytetrafluoroethylene fiber and method for manufacturing the same | |
JP2003268622A (en) | Drawn polyolefin fiber and method for producing the same | |
JP7176850B2 (en) | Sea-island composite fiber bundle | |
JP6209983B2 (en) | Polyethylene hollow fiber membrane and method for producing polyethylene hollow fiber membrane | |
JP4266247B2 (en) | Production method of polypropylene fiber | |
US5024797A (en) | Processes for the production of mono- and multifilaments and staple fibers based on polyarylene sulfides | |
JPS6241341A (en) | High speed stretching of gel fiber | |
JP2002180347A (en) | Method for producing oriented product of crystalline polymer | |
JP2003328233A (en) | Polyolefin-based drawn conjugate fiber and nonwoven fabric obtained from the same | |
US5215819A (en) | Processes for the production of mono- and multifilaments and staple fibers based on kolyarylene sulfides and high-strength polyarylene sulfide fibers | |
JP2004052173A (en) | High-strength polyester monofilament and method for producing the same | |
JP2730193B2 (en) | Polyamide monofilament and method for producing the same | |
JPS61108712A (en) | Production of polyvinyl alcohol fiber of high strength and high elastic modulus | |
JPH1181036A (en) | High strength polypropylene fiber and its production | |
JP2002285446A (en) | Method for producing oriented product of crystalline polymer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20001023 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081117 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081117 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091117 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091117 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101117 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101117 Year of fee payment: 10 |
|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101117 Year of fee payment: 10 |
|
R371 | Transfer withdrawn |
Free format text: JAPANESE INTERMEDIATE CODE: R371 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101117 Year of fee payment: 10 |
|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101117 Year of fee payment: 10 |
|
R371 | Transfer withdrawn |
Free format text: JAPANESE INTERMEDIATE CODE: R371 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101117 Year of fee payment: 10 |
|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101117 Year of fee payment: 10 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101117 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111117 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111117 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121117 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131117 Year of fee payment: 13 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |