JP2727879B2 - Melt spinning method - Google Patents
Melt spinning methodInfo
- Publication number
- JP2727879B2 JP2727879B2 JP20897192A JP20897192A JP2727879B2 JP 2727879 B2 JP2727879 B2 JP 2727879B2 JP 20897192 A JP20897192 A JP 20897192A JP 20897192 A JP20897192 A JP 20897192A JP 2727879 B2 JP2727879 B2 JP 2727879B2
- Authority
- JP
- Japan
- Prior art keywords
- silicone oil
- silicone
- applying
- polymer
- spinning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Chemical Treatment Of Fibers During Manufacturing Processes (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は溶融紡糸時に紡糸口金面
へ塗布する離型剤の塗布方法に関するものである。更に
詳しくは、異なる２種のシリコ−ンを順次塗布すること
により離型性の向上を図ったものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying a release agent to a spinneret during melt spinning. More specifically, the releasability is improved by sequentially applying two different types of silicone.
【０００２】[0002]
【従来の技術】熱可塑性合成繊維の溶融紡糸方法は高温
で溶融したポリマ―を紡糸口金の吐出孔から吐出し、冷
却固化した後、紡糸油剤を付与して、高速で巻取る工程
であり、口金吐出孔から吐出するポリマ―の挙動は、そ
の後の製糸工程での操業安定性や得られた繊維の品質に
重大な影響をおよぼすことが知られている。2. Description of the Related Art The melt spinning method of thermoplastic synthetic fiber is a process of discharging a polymer melted at a high temperature from a discharge hole of a spinneret, cooling and solidifying, applying a spinning oil agent, and winding at a high speed. It is known that the behavior of the polymer discharged from the spinneret discharge hole has a significant effect on the operation stability and the quality of the obtained fiber in the subsequent spinning process.
【０００３】従って、吐出ポリマ―が口金表面の吐出孔
周辺部へ付着し、吐出ポリマ―の流動状態に変動を与え
るのを防止するために口金表面に離型剤を塗布する方法
がよく知られている。通常、口金表面は２７０〜３００
℃の高温に保たれているため塗布された離型剤は熱によ
る変質とポリマ―からの昇華物や析出物の付着蓄積によ
って、時間の経過とともに離型効果が減少し、吐出ポリ
マ―が付着しやすくなるため、ポリマ―の流動状態が不
安定となり曲がりやピクツキ現象が生じるようになっ
て、操業性や品質の低下を生じるようになる。Therefore, a method of applying a release agent to the surface of the base to prevent the discharge polymer from adhering to the periphery of the discharge hole on the base of the base and giving a change to the flow state of the discharge polymer is well known. ing. Usually, the base surface is 270 to 300
The release agent applied is kept at a high temperature of ℃, the release effect of the release agent decreases with the lapse of time due to deterioration of the applied release agent due to heat and adhesion and accumulation of sublimates and precipitates from the polymer, and the discharged polymer adheres. As a result, the flow state of the polymer becomes unstable, and the polymer is bent or spiked, resulting in deterioration in operability and quality.
【０００４】吐出ポリマ―の流動状態を安定に長時間維
持するために、従来より種々検討がなされてきたが、い
ずれも十分な効果が得られていない。例えば、特公昭５
４−３１５３０号公報には、耐熱性のよいメチルフェニ
ルシリコ―ンと離型性のよいジメチルシリコ―ンとシリ
カの三者を混合し、それぞれの欠点を相補うようにする
方法が提案されているが、我々が確認したところではジ
メチルシリコ―ンの耐熱性が劣るため、実際にはジメチ
ルシリコ―ンの単独使用の場合と大差ない効果しか得ら
れないのが実状である。また、特開昭５３−６５４０９
号公報には、まず焼付型のシリコ―ン離型剤を塗布し、
次いでそのうえにジメチルシリコ―ンを主成分とする離
型剤を塗布することが開示されているが、我々の確認で
は、新しい口金を装着した初回の塗布作業は比較的容易
ではあるが、数日間の周期で実施する場合には、２回目
以降の塗布作業時に前回塗布した古いシリコ―ン被膜を
口金面から除去する清掃作業がむずかしいこと、更には
ジメチルシリコ―ンの耐熱性が劣ることに起因する離型
効果の減少速度が早いという欠点があり、十分な効果は
得られていないのが実状である。In order to maintain the flow state of the discharge polymer stably for a long period of time, various studies have been made, but none of them has been able to obtain a sufficient effect. For example,
Japanese Patent Application Laid-Open No. 4-31530 proposes a method in which methylphenylsilicon having good heat resistance, dimethylsilicon having good mold releasing property and silica are mixed to complement the respective disadvantages. However, we have confirmed that the heat resistance of dimethylsilicone is inferior, and in fact, the effect is not much different from the case of using dimethylsilicon alone. Also, JP-A-53-65409
First, a baking type silicone release agent is applied to
Next, it is disclosed that a release agent containing dimethyl silicone as a main component is applied thereon. However, according to our confirmation, the initial application work with a new base is relatively easy, but it takes several days. In the case of periodic application, it is difficult to clean the previously applied silicone film from the base surface at the time of the second and subsequent coating operations, and the heat resistance of dimethyl silicon is poor. There is a drawback that the rate of reduction of the release effect is high, and in fact, a sufficient effect has not been obtained.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、前記
従来技術の欠点を改善し、長時間継続使用後も離型効果
の減少が少なく、安定した操業性と品質を維持するとと
もに、２回目以降の塗布作業時の口金面の清掃作業が極
めて容易に実施可能な熱可塑性合成繊維の溶融紡糸口金
への離型剤の塗布方法を提供するものである。SUMMARY OF THE INVENTION It is an object of the present invention to improve the disadvantages of the prior art, to reduce the effect of releasing after a long continuous use, to maintain stable operability and quality, An object of the present invention is to provide a method for applying a release agent to a melt-spinning die of thermoplastic synthetic fibers, which makes it very easy to clean the die surface during the second and subsequent coating operations.
【０００６】[0006]
【課題を解決するための手段】前記した本発明の目的
は、熱可塑性合成繊維の溶融紡糸時に紡糸口金面へシリ
コ―ン油を塗布するに際し、シリコ−ン油に対してジメ
チルシリコ―ンを８５重量％以上含有したシリコ―ン油
を塗布し、次いでシリコ―ン油に対してアルキルフェニ
ルシリコ−ンのフェニル化率が２０〜８０％であるアル
キルフェニルシリコ―ンを８０重量％以上含有したシリ
コ―ン油を塗布することを特徴とする溶融紡糸方法によ
って達成できる。SUMMARY OF THE INVENTION The object of the present invention is to apply dimethyl silicone to silicone oil when applying silicone oil to the spinneret surface during melt spinning of thermoplastic synthetic fibers. A silicone oil containing at least 85% by weight was applied, and then at least 80% by weight of an alkylphenyl silicone having a phenylation ratio of 20 to 80% based on the silicone oil. This can be achieved by a melt spinning method characterized by applying silicone oil.
【０００７】溶融紡糸口金の吐出孔から吐出されるポリ
マ―の流動状態を安定に長時間維持するとともに、数日
間紡糸経過後の口金表面の清掃作業が短時間で容易に実
施できるためには第１の要件として口金表面すなわち金
属面と塗布剤であるシリコ―ン油との離型性が重要であ
り、第２の要件として、シリコ―ン油の耐熱性が重要で
ある。しかしながら、２つの要件を同時に満たす塗布剤
はまだ見い出されていないのが実状であり、我々はこの
２つの要件を満足する方法として、各種シリコ―ン油の
組み合わせを研究し、本発明に到達したものである。In order to stably maintain the flow state of the polymer discharged from the discharge hole of the melt spinneret for a long period of time and to easily perform the work of cleaning the spinneret surface after a few days of spinning in a short time, The first requirement is that the releasability of the surface of the base, that is, the metal surface, from the silicone oil as the coating agent is important, and the second requirement is the heat resistance of the silicone oil. However, the fact is that a coating agent that satisfies the two requirements at the same time has not yet been found, and we have studied the combination of various silicone oils as a method of satisfying the two requirements and arrived at the present invention. Things.
【０００８】第１の要件を満足するためには、シリコ−
ン油の金属面との離型性および耐熱性と、更には後から
塗布される耐熱性シリコ―ン油との相溶性が重要であ
り、これらの要素を満足できるシリコ―ン油として主成
分がジメチルシリコ―ン８５重量％以上からなるシリコ
―ン油が最も良好なことを見い出したのである。シリコ
―ン油中のジメチルシリコ―ンが８５重量％未満になる
と粘性が高くなり離型性が低下して、口金面の清掃作業
がむずかしくなるため、ジメチルシリコ―ンの比率は８
５重量％以上が必要である。好ましくは、９０重量％以
上である。また、シリカ微粉末を３〜１５重量％、酸化
防止剤を０〜５重量％含有してもよい。次に第２の要件
は、単なる耐熱性のみでなく溶融状態の熱可塑性ポリマ
―との離型性が良好であり、この良好な離型性を長時間
にわたって維持できることが重要である。このような観
点で各種シリコ―ン油を研究した結果、アルキルフェニ
ルシリコ―ンを８０重量％以上、好ましくは８５重量％
以上含有するシリコ−ン油が良好である。シリコ―ン油
中のアルキルフェニルシリコ―ンの比率が８０重量％未
満になると粘性が高くなり、口金面への均一塗布がむず
かしくなる。また、アルキルフェニルシリコ−ンのフェ
ニル化率は２０〜８０％、好ましくは３０〜７０％のも
のが特に良好なことを見い出した。すなわち、フェニル
化率が２０％未満では高温の大気中での長時間にわたる
耐熱性が不十分であり、一方、８０％より大きいと耐熱
性は良好であるが粘性が高くなって、口金面への均一塗
布が困難になる。ここでいう、アルキルフェニルシリコ
―ンのアルキル基はメチル基、エチル基、プロピル基、
ブチル基およびそれらの誘導体であることを意味する。
また、シリコーン油には、シリカ微粉末を３〜２０％、
酸化防止剤を０〜５％含有してもよい。[0008] In order to satisfy the first requirement, silicon must be used.
The releasability and heat resistance of the oil from the metal surface and the compatibility with the heat-resistant silicone oil to be applied later are important. Has been found to be the best with a silicone oil consisting of more than 85% by weight of dimethyl silicone. When the content of dimethyl silicone in the silicone oil is less than 85% by weight, the viscosity increases, the releasability decreases, and the cleaning work of the base surface becomes difficult. Therefore, the ratio of dimethyl silicone is 8%.
More than 5% by weight is required. Preferably, it is 90% by weight or more. Further, it may contain 3 to 15% by weight of silica fine powder and 0 to 5% by weight of antioxidant. The second requirement is that not only the heat resistance but also the releasability from the molten thermoplastic polymer is good, and it is important that this good releasability can be maintained for a long time. As a result of researching various silicone oils from such a viewpoint, it was found that alkylphenyl silicone was 80% by weight or more, preferably 85% by weight.
The silicone oil contained above is good. If the proportion of alkylphenylsilicone in the silicone oil is less than 80% by weight, the viscosity increases and uniform application to the die surface becomes difficult. In addition, it has been found that the phenylation rate of the alkylphenylsilicone is particularly preferably 20 to 80%, preferably 30 to 70%. That is, if the phenylation ratio is less than 20%, the heat resistance over a long period of time in a high-temperature atmosphere is insufficient, while if it is more than 80%, the heat resistance is good but the viscosity becomes high, and Becomes difficult to apply uniformly. Here, the alkyl group of the alkylphenyl silicone is a methyl group, an ethyl group, a propyl group,
It means butyl group and derivatives thereof.
The silicone oil contains 3 to 20% of silica fine powder,
An antioxidant may be contained at 0 to 5%.
【０００９】紡糸口金面へのシリコ―ン油の塗布方法と
しては、前記した本発明のシリコ―ン油を耐熱性の布ま
たはブラシ等で口金面へ塗布する方法や本発明のシリコ
―ン油を加圧圧縮気体（空気、窒素等）を用いたスプレ
―ガンで噴霧塗布する方法、本発明のシリコ―ン油を各
種フレオンガスや揮発性溶媒とともに封入したスプレ―
缶を用いて噴霧塗布する方法等のいずれの方法であって
も有効である。As a method of applying the silicone oil to the spinneret surface, the above-mentioned method of applying the silicone oil of the present invention to the spinneret surface with a heat-resistant cloth or a brush or the like, and the method of applying the silicone oil of the present invention to the spinneret surface. Spraying with a spray gun using pressurized compressed gas (air, nitrogen, etc.), spray containing silicone oil of the present invention together with various freon gases and volatile solvents
Any method such as a method of spray coating using a can is effective.
【００１０】本発明はポリエステル、ポリアミド、ポリ
プロピレン等の熱可塑性合成繊維を溶融紡糸する際の紡
糸口金面への離型剤塗布方法として、極めて有効である
が、繊維の溶融紡糸のみに限定するものではなく、熱可
塑性ポリマ―を溶融して押出しする際の吐出口金面（例
えば、ポリマ―の重合工程やフィルム製造工程、プラス
ッチク成形工程等）への離型剤塗布方法として極めて有
効に適用できる。The present invention is extremely effective as a method for applying a release agent to the spinneret surface when melt-spinning thermoplastic synthetic fibers such as polyester, polyamide, and polypropylene, but is limited to only melt spinning of fibers. Rather, it can be applied very effectively as a method of applying a release agent to the surface of a discharge mouth (eg, a polymer polymerization process, a film production process, a plastic molding process, etc.) when a thermoplastic polymer is melted and extruded. .
【００１１】[0011]
【実施例】以下、本発明を実施例により、さらに具体的
に説明する。 実施例１ 単独のシリコ―ン油や従来の技術で示されている方法で
は、本発明の目的を十分に満足できる方法はない。しか
しながら、ジメチルシリコ―ン８５重量％以上含有する
ジメチルシリコ―ン油は、金属板への塗布性は良好であ
り、長時間加熱後の金属板との離型性（＝口金修正作業
性）も良好である。また、フェニル化率が２０〜８０％
であるメチルフェニルシリコ―ンを８０重量％以上含有
するメチルフェニルシリコ―ン油は、耐熱性が良好で、
長時間加熱後のポリマ―との離型性も良好である。従っ
て、単独使用ではいずれも十分な効果が得られなかった
が、それぞれのシリコ―ン油を組み合わせることで本発
明の目的とする効果が得られるのではないかと着目し、
表１に示す各種組成のシリコーン油の組み合わせを行
い、テストを実施した。EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. Example 1 There is no single silicone oil or the method described in the prior art that can adequately satisfy the object of the present invention. However, dimethylsilicone oil containing 85% by weight or more of dimethylsilicone has good coatability on a metal plate, and also has good releasability from a metal plate after long-time heating (= repairability of a die). Good. In addition, the phenylation rate is 20-80%
Methylphenylsilicone oil containing at least 80% by weight of methylphenylsilicone is excellent in heat resistance,
Good releasability from polymer after heating for a long time. Therefore, although sufficient effects were not obtained in any case when used alone, attention was paid to the possibility that the effects intended by the present invention could be obtained by combining the respective silicone oils.
Various combinations of silicone oils shown in Table 1 were combined and tested.
【００１２】シリコ―ン油の組成と耐熱性および離型性
の関係を評価するために、直径１００ｍｍφの紡糸口金
と同一の表面状態を有する金属板に表１に示す各種組成
のシリコ―ン油の試料約１．０ｇを均一に塗布し秤量し
た後、大気中３００℃で７２時間加熱した。耐熱性の評
価として加熱後の重量を秤量し，下記式により重量減少
率（％）を算出するとともに表面状態の変化を観察し
た。 重量減少率（％）＝（Ｂ−Ｃ）／（Ｂ−Ａ）×１００ Ａ：シリコ―ン油を塗布する前の金属板の重さ（ｇ） Ｂ：シリコ―ン油を塗布した後の金属板の重さ（ｇ） Ｃ：シリコ―ン油を塗布し、７２時間加熱後の金属板の
重さ（ｇ） 更に、紡糸口金面とシリコ―ン油との離型性の評価とし
て前記加熱テスト後の金属板を用いて金属板の表面から
シリコ―ン油を除去する作業を通常の口金面の清掃作業
と同様の方法、すなわちアルミ板製の清掃治具を用いて
３０秒間金属板表面の清掃作業を実施した際の清掃作業
の難易性と金属板表面の仕上り状態を観察評価した。In order to evaluate the relationship between the composition of the silicone oil and the heat resistance and releasability, a silicone oil having various compositions shown in Table 1 was prepared on a metal plate having the same surface condition as a spinneret having a diameter of 100 mmφ. About 1.0 g of the sample was uniformly applied and weighed, and then heated at 300 ° C. in the air for 72 hours. As an evaluation of heat resistance, the weight after heating was weighed, the weight loss rate (%) was calculated by the following equation, and the change in the surface state was observed. Weight loss rate (%) = (BC) / (BA) × 100 A: Weight of metal plate before applying silicone oil (g) B: After applying silicone oil Weight of metal plate (g) C: Weight of metal plate after applying silicone oil and heating for 72 hours (g) Further, the above-mentioned evaluation was conducted to evaluate the releasability between the spinneret surface and the silicone oil. The operation of removing the silicone oil from the surface of the metal plate using the metal plate after the heating test is the same as the usual cleaning work of the base surface, that is, the metal plate is cleaned for 30 seconds using an aluminum plate cleaning jig. The difficulty of the cleaning operation when the surface cleaning operation was performed and the finished state of the metal plate surface were observed and evaluated.
【００１３】その後ポリマ―との離型性評価のために、
前記加熱テスト後の金属板上に約１ｇのポリエステルチ
ップ１０粒を置いて、大気中に２８０℃で１５分間加熱
した後、ポリエステルチップをピンセットで除去し、ポ
リマ―との離型性を評価した。評価結果は表２の通りで
あった。Then, for the evaluation of the releasability from the polymer,
After placing about 10 g of polyester chips of about 1 g on the metal plate after the heating test and heating in the air at 280 ° C. for 15 minutes, the polyester chips were removed with tweezers, and the releasability from the polymer was evaluated. . Table 2 shows the evaluation results.
【００１４】表１および２において、実験Ｎｏ．４、
５、１０、１１〜１４、および１７は本発明の効果を明
確にするための比較例である。Ｎｏ．１、２、３はシリ
コ―ン油の耐熱性、ポリマ―との離型性および金属板と
シリコ―ン油との離型性のいずれも良好であったが、Ｎ
ｏ．４は金属板とシリコ―ン油との離型性が不十分であ
った。Ｎｏ．５はメチルフェニルシリコ―ンのフェニル
化率が１５％と本発明の範囲よりも低いため、メチルフ
ェニルシリコ―ン油の耐熱性が不十分であり、従って、
ポリマ―の離型性が不十分であったが、Ｎｏ．６〜９は
耐熱性、ポリマ―の離型性および金属板とシリコ―ン油
との離型性のいずれも良好であった。一方、Ｎｏ．１０
はメチルフェニルシリコ―ンのフェニル化率が８５％と
本発明の範囲よりも高いため、金属板とシリコ―ン油と
の離型性が不良であった。実験Ｎｏ．１１〜１４は特開
昭５３−６５４０９号公報に開示されている方法、すな
わちメチルフェニルシリコ―ン油を口金表面に塗布し、
次いでそのうえにジメチルシリコ―ンを主成分とする離
型剤を塗布する方法を検証するために、実施したもので
ある。Ｎｏ．１１〜１４のいずれについても、加熱テス
ト後の表面状態は白濁固化し、ポリマ―の離型性が全く
なく、更に金属板とシリコ―ン油との離型性も極めて不
良であった。Ｎｏ．１５および１６は耐熱性、ポリマ―
との離型性および金属板とシリコ―ン油との離型性のい
ずれも良好であったが、Ｎｏ．１７は金属板とシリコ―
ン油との離型性が不十分であった。In Tables 1 and 2, Experiment No. 4,
5, 10, 11 to 14 and 17 are comparative examples for clarifying the effects of the present invention. No. Samples Nos. 1, 2, and 3 had good heat resistance of silicone oil, good releasability from polymer, and good releasability between metal plate and silicone oil.
o. In No. 4, the releasability between the metal plate and the silicone oil was insufficient. No. In No. 5, since the phenylation ratio of methylphenylsilicone is 15%, which is lower than the range of the present invention, the heat resistance of methylphenylsilicone oil is insufficient, and
The releasability of the polymer was insufficient. Samples Nos. 6 to 9 were all good in heat resistance, releasability of polymer and releasability of metal plate and silicone oil. On the other hand, No. 10
Since the phenylation ratio of methylphenylsilicone was 85%, which was higher than the range of the present invention, the releasability between the metal plate and the silicone oil was poor. Experiment No. Nos. 11 to 14 are disclosed in JP-A-53-65409, that is, methylphenylsilicone oil is applied to the surface of a die,
Then, it was carried out to verify a method of applying a release agent containing dimethyl silicon as a main component thereon. No. In all of the samples 11 to 14, the surface condition after the heating test was clouded and solidified, there was no release property of the polymer, and the release property between the metal plate and the silicone oil was extremely poor. No. 15 and 16 are heat resistant, polymer
Both the mold releasability from the metal plate and the silicone oil were good. 17 is a metal plate and silicon
The releasability from the oil was insufficient.
【００１５】[0015]
【表１】 [Table 1]
【表２】 上記した実施結果によって、本発明の目的とする長時間
加熱使用後も離型効果の減少が少なく、安定した操業性
と品質を維持するとともに、口金面の清掃作業におい
て、２回目以降の塗布作業時が極めて容易に実施可能な
熱可塑性合成繊維の溶融紡糸口金への離型剤の塗布方法
は、紡糸口金面へシリコ―ン油を塗布するに際し、紡糸
口金の表面にシリコ−ン油に対してジメチルシリコ―ン
を８５重量％以上含有したシリコ―ン油を塗布した後、
シリコ―ン油に対してアルキルフェニルシリコ−ンのフ
ェニル化率が２０〜８０％であるアルキルフェニルシリ
コ―ンを８０重量％以上含有したシリコ―ン油を塗布す
ることを特徴とする溶融紡糸方法によって達成できるこ
とを確認した。[Table 2] According to the results of the above, the reduction of the releasing effect is small even after the long-time heating used for the purpose of the present invention, and the stable operability and quality are maintained. The method of applying a release agent to the melt spinning die of thermoplastic synthetic fibers, which can be carried out extremely easily, is to apply silicone oil to the surface of the spinning die. After applying silicone oil containing 85% by weight or more of dimethyl silicone,
A melt spinning method comprising applying a silicone oil containing at least 80% by weight of an alkylphenyl silicone having a phenylation ratio of 20 to 80% to the silicone oil. That can be achieved by
【００１６】実施例２ 実施例１で得られた試験結果が実際の熱可塑性合成繊維
の生産工程の中で再現できるかどうかを確認する目的で
本発明の代表例の１つである実施例１の実験Ｎｏ．１と
比較例としてジメチルシリコーン油、メチルフェニルシ
リコーン油の単独塗布およびジメチルシリコーン油とメ
チルフェニルシリコーン油を混合したシリコーン油を塗
布する特公昭５４ー３１５３０号公報の方法、更に実施
例１の実験Ｎｏ．１１の方法をそれぞれポリエステル糸
の溶融紡糸口金面へ塗布し、連続生産を行い紡糸時の糸
切れ回数を比較調査し、表３の結果を得た。また、得ら
れた未延伸糸ドラムを通常のドロ―ツイスタ―ｍ／ｃで
パ―ン巻き延伸糸に巻き上げる際の糸切れ率を比較調査
し、表４の結果を得た。Example 2 In order to confirm whether or not the test results obtained in Example 1 can be reproduced in an actual thermoplastic synthetic fiber production process, Example 1, which is one of the representative examples of the present invention, is used. Experiment No. 1 and Comparative Example, a method of JP-B-54-31530 in which dimethyl silicone oil and methyl phenyl silicone oil were applied alone and a silicone oil in which dimethyl silicone oil and methyl phenyl silicone oil were mixed was applied. . Each of the 11 methods was applied to the surface of a melt spinning nozzle of polyester yarn, and continuous production was performed. The number of times of yarn breakage during spinning was comparatively investigated, and the results shown in Table 3 were obtained. Further, the yarn breakage ratio when the obtained undrawn yarn drum was wound into a drawn yarn wound with a normal draw twister m / c was comparatively investigated, and the results shown in Table 4 were obtained.
【００１７】なお、ポリエステル糸の溶融紡糸条件およ
びドローツイスター延伸条件は下記の条件で実施し、得
られたポリエステル糸の糸特性は下記の通りであった。 紡糸条件 糸種；７５デニール−７２フィラメント−３葉断面糸 ポリマータイプ；スーパーブライト（固有粘度＝０．６
５８） 紡糸機；プレッシャーメルタ型 紡糸速度；１６５０ｍ／分 油剤付着量；１．０％ 紡糸温度；２９３℃ 口金面温度；２８０℃ 口金面定期清掃サイクル；４日 連続生産日数；２０日 延伸条件 延伸倍率；２．５６倍 延伸速度；１０００ｍ／分 ホットローラ温度；９０℃ 熱処理温度；１５０℃ 糸特性 デニール；７４．０Ｄ 強度；５．１ｇ／ｄ 伸度；４０．０％ 沸収；７．０％ 表３および表４において実験Ｎｏ．１８は、実施例１で
良好な結果が得られた実験Ｎｏ．１と同一の方法でシリ
コーン油を口金面に塗布したものであり、２０日間の連
続生産で紡糸中の糸切れはほとんどなく、得られた未延
伸糸ドラムを延伸した際の延伸時の糸切れ率も極めて低
く、実施例１の結果と同様に良好な効果が確認できた。
実験Ｎｏ．１９〜２２は本発明の効果を明確にするため
の比較例である。実験Ｎｏ．１９はメチルフェニルシリ
コーン油単独で塗布した方法で実施したものであるが、
定期口金清掃による口金面の清掃状態が不十分なため、
紡糸日数の経過とともに、紡糸中の糸切れが増加し、ま
た、延伸時の糸切れ率も同様の傾向で増加した。実験Ｎ
ｏ．２０はジメチルシリコーン油単独で塗布した方法で
実施したものであるが、シリコーン油の耐熱性が不十分
なために、紡糸開始後および定期口金清掃後の紡糸日数
の経過とともに紡糸中の糸切れが増加し、延伸時の糸切
れ率も増大した。実験Ｎｏ．２１およびＮｏ．２２は、
ジメチルシリコーン油とメチルフェニルシリコーン油を
混合したシリコーン油を塗布した方法および実施例１の
実験Ｎｏ．１１と同一の方法で、従来技術に記載された
方法を、比較評価したものであるが紡糸中の糸切れ発生
回数および、延伸時の糸切れ率ともに多発し、本発明の
目的とする安定した操業性と品質を長時間継続可能なレ
ベルには到底達しないレベルであった。The melt spinning conditions and draw twister stretching conditions of the polyester yarn were carried out under the following conditions, and the yarn characteristics of the obtained polyester yarn were as follows. Spinning conditions Yarn type; 75 denier-72 filament-3 leaf cross section polymer type; Super Bright (intrinsic viscosity = 0.6
58) Spinning machine; pressure melter spinning speed; 1650 m / min Oil adhesion amount: 1.0% Spinning temperature; 293 ° C. Cap surface temperature; 280 ° C. Regular cleaning cycle of the cap surface; 4 days Continuous production days; 20 days Stretching conditions Stretching Magnification: 2.56 times Stretching speed: 1000 m / min Hot roller temperature: 90 ° C. Heat treatment temperature: 150 ° C. Yarn properties Denier: 74.0 D Strength: 5.1 g / d Elongation: 40.0% Boiling: 7.0 % In Tables 3 and 4, Experiment No. 18, good results in Example 1 were obtained Experiment No. Silicone oil was applied to the die surface in the same manner as in Example 1. There was almost no yarn breakage during spinning in continuous production for 20 days, and the yarn breakage during drawing when the obtained undrawn yarn drum was drawn. The rate was also extremely low, and a favorable effect was confirmed in the same manner as the result of Example 1 .
Experiment No. 19 to 22 are comparative examples for clarifying the effects of the present invention. Experiment No. 19 was carried out by a method of applying methylphenyl silicone oil alone,
Due to insufficient cleaning of the base surface by regular base cleaning,
With the elapse of the spinning days, yarn breakage during spinning increased, and the yarn breakage ratio during stretching also increased in a similar tendency. Experiment N
o. 20 was carried out by a method in which dimethyl silicone oil was applied alone. However, due to insufficient heat resistance of the silicone oil, yarn breakage during spinning occurred with the lapse of spinning days after the start of spinning and after the regular die cleaning. As a result, the yarn breakage during stretching also increased. Experiment No. 21 and No. 21. 22 is
The method of applying a silicone oil in which dimethyl silicone oil and methylphenyl silicone oil were mixed and the experiment No. In the same manner as in Example 11, the method described in the prior art was compared and evaluated. The level of operability and quality did not reach a level that could be continued for a long time.
【００１８】[0018]
【表３】 [Table 3]
【表４】 [Table 4]
【００１９】[0019]
（１）本発明の溶融紡糸方法を採用することにより、溶
融紡糸口金の吐出孔から吐出されるポリマーの流動状態
を安定に長時間維持することができる。（ ２）従って長時間経過後も溶融紡糸中の糸切れ発生が
ほとんどなく、極めて安定した操業性を維持することが
できる。 （３）シリコーン油の被膜は２重構造を形成し、金属面
との離型性が良好なジメチルシリコーンの薄膜が口金表
面を覆っており、耐熱性の良好なアルキルフェニルシリ
コーンの薄膜がジメチルシリコーンの薄膜を覆っている
ため長時間紡糸継続後に口金表面を清掃し、再塗布する
に際し口金表面に付着した酸化ポリマーの除去や、ゲル
化したシリコーン被膜の除去が極めてスムーズに実施可
能である。(1) By employing the melt spinning method of the present invention, the flow state of the polymer discharged from the discharge hole of the melt spinneret can be stably maintained for a long time. ( 2) Therefore, even after a long time, there is almost no occurrence of yarn breakage during melt spinning, and extremely stable operability can be maintained. (3) The silicone oil film has a double structure, a thin film of dimethyl silicone with good releasability from the metal surface covers the base surface, and a thin film of alkylphenyl silicone with good heat resistance is dimethyl silicone. After the spinning is continued for a long time, the surface of the die is cleaned and the oxide polymer adhering to the die surface and the gelled silicone film can be removed very smoothly when recoating.
Claims (1)
面へシリコーン油を塗布するに際し、シリコーン油に対
してジメチルシリコーンを８５重量％以上含有したシリ
コーン油を塗布し、次いでシリコーン油に対してアルキ
ルフェニルシリコーンのフェニル化率が２０〜８０％で
あるアルキルフェニルシリコーンを８０重量％以上含有
したシリコーン油を塗布することを特徴とする溶融紡糸
方法。When applying a silicone oil to a spinneret surface during melt spinning of a thermoplastic synthetic fiber, a silicone oil containing 85% by weight or more of dimethyl silicone based on the silicone oil is applied, and then a silicone oil is applied. A melt spinning method comprising applying a silicone oil containing 80% by weight or more of an alkylphenyl silicone having a phenylation ratio of the alkylphenyl silicone of 20 to 80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20897192A JP2727879B2 (en) | 1992-08-05 | 1992-08-05 | Melt spinning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20897192A JP2727879B2 (en) | 1992-08-05 | 1992-08-05 | Melt spinning method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0657540A JPH0657540A (en) | 1994-03-01 |
| JP2727879B2 true JP2727879B2 (en) | 1998-03-18 |
Family
ID=16565196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20897192A Expired - Fee Related JP2727879B2 (en) | 1992-08-05 | 1992-08-05 | Melt spinning method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2727879B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110023032B (en) | 2016-12-12 | 2021-09-28 | 西铁城时计株式会社 | Coolant joint device |
-
1992
- 1992-08-05 JP JP20897192A patent/JP2727879B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0657540A (en) | 1994-03-01 |
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