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JP2021161572A5
JP2021161572A5 JP2020065383A JP2020065383A JP2021161572A5 JP 2021161572 A5 JP2021161572 A5 JP 2021161572A5 JP 2020065383 A JP2020065383 A JP 2020065383A JP 2020065383 A JP2020065383 A JP 2020065383A JP 2021161572 A5 JP2021161572 A5 JP 2021161572A5
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本発明におけるポリフェニレンスルフィド樹脂のメルトフローレート(MFR)は100~250g/10minが好ましい。さらに好ましくは130~200g/10minである。紡糸をし易い点から、100g/10min以上が好ましい。繊維の強度を保持し、フィルターのようなメッシュ織物に強度耐久性を持たせて好適に使用する点から、250g/10minを以下であることが好ましい。 The melt flow rate (MFR) of the polyphenylene sulfide resin in the present invention is preferably 100-250 g/10 min. More preferably, it is 130 to 200 g/10 min. 100 g/ 10 min or more is preferable from the viewpoint of easy spinning. It is preferably 250 g/ 10 min or less from the viewpoint of maintaining the strength of the fiber and giving the mesh fabric such as a filter with strength and durability to be suitably used.

以下に実施例を挙げて本発明を具体的に説明する。なお、本発明は以下に述べる実施例に限定されるものではない。実施例におけるフィラメントの物性、評価は、以下の通りとした。
A.MFR
JIS K 7210(1999年)に準じて、温度315.5℃、荷重5000gの条件でMFR値を測定した。
B. 繊度
JIS L 1013に準じ、試料を枠周1.125mの検尺機を用い、120回/minの速度で捲き取り、その質量を量り、繊度を求めた。これを5回測定し、平均値を出した。
C.破断強度、破断伸度、5%モジュラス、10%モジュラス
JIS L 1013に準じ、島津製作所製のAGS-1KNGオートグラフ(登録商標)引張試験機を用い、試料糸長20cm、定速引張速度20cm/minの条件で測定する。荷重-伸び曲線での荷重の最高値を繊度で除した値を破断強度(cN/dtex)とし、その時の伸び率を破断伸度(%)とし、伸び率が5%の時の強度を5%モジュラス(cN/dtex)、伸び率が1%の時の強度を10%モジュラス(cN/dtex)とする。
D. 最内外層の熱収応力比
熱収縮応力は、カネボウエンジニアリング製のKE-II型収縮応力測定装置を用いて測定する。長さ5cmのループ状として糸端を結んだ試料に、繊度×2/30(cN)の初期荷重をかけて、室温から120℃/minの昇温速度で加熱した際の熱収縮力を測定する。測定した熱収縮力の最高点を熱収縮力のピーク(cN)とし、そのときの温度を熱収縮力ピーク温度(℃)とする。そして上記熱収縮力の最高値を、繊維繊度の2倍で除した値を熱収縮応力(cN/dtex)とし、5回測定し平均値を熱収縮応力とした。最内外層の熱収応力比(Sr)は以下の式1により求める。
Sr=Si/So ・・・ 式1
(Sr:最内外層の熱収応力比、Si:パッケージの最内層の熱収縮応力〔紙管外径より、捲厚1mmのポイントを測定〕、So:パッケージの最外層の熱収縮応力〔パッケージの表面層部を1分解舒後のポイントを測定〕)
E.繊維パッケージの捲き状態
捲取操業性は、捲き形状が良好であれば「○」、軽微な捲き崩れ、捲量不足を「△」、酷い捲き崩れ、捲き付け不可などは「×」とした。
F.製織性及び外観評価
得られたポリフェニレンスルフィドモノフィラメントを用いて、スルーザー型織機により、回転数300rpmで、420メッシュ/2.54cm(11dtex未満)、22
5メッシュ/2.54cm(11dtex以上、21dtex未満)、150メッシュ/2.54cm(21dtex以上、35dtex)のメッシュ織物を製織した。その際、筬のスカムの発生、タテ糸、ヨコ糸切れの状態を目視で確認し製織性として評価した。得られた織物の外観(節、ヒケ、筋の発生など)を目視で確認し外観評価として評価した。製織性及び外観評価が共に良ければ「○」、いずれかが悪ければ「△」、どちらも悪い場合は「×」とした。
G.メッシュ性能評価
Fで得られたメッシュ織物を用いて、160℃、20分間熱セットを行い、加工したメッシュ織物(熱セット前後)の伸長回復サイクルを実施した後の外観を評価する。伸長回復サイクルは、JIS L 1013に準じ、島津製作所製のAGS-1KNGオートグラフ(登録商標)引張試験機を用い、試料長20cm、幅5cm、定速引張速度20cm/minの条件で、10%伸長回復サイクルを5回実施する。その時のメッシュ織物の外観を目視にて観察した。目ずれ、歪みや破損が無いものを「〇」、歪み、軽微な破損が有るものを「×」、歪みや破損の有無の判断ができなかったものを「△」とした。
H. 総合評価
紡糸操業性、製織性及び外観評価、並びにメッシュ性能評価の項目について、全て〇の判定のものを「〇」、△が1つ以上あり×がないものを「△」、1項目でも×があるものは、「×」とした。
EXAMPLES The present invention will be specifically described below with reference to Examples. It should be noted that the present invention is not limited to the examples described below. The physical properties and evaluation of filaments in Examples were as follows.
A. MFR
The MFR value was measured under conditions of a temperature of 315.5° C. and a load of 5000 g according to JIS K 7210 (1999).
B. Fineness According to JIS L 1013, a sample was wound up at a rate of 120 times/min using a measuring machine with a frame circumference of 1.125 m, and its mass was measured to obtain fineness. This was measured 5 times and an average value was given.
C. Breaking strength, breaking elongation, 5% modulus, 10% modulus According to JIS L 1013, using a Shimadzu AGS-1KNG Autograph (registered trademark) tensile tester, sample thread length 20 cm, constant tensile speed 20 cm / Measured under min conditions. The breaking strength (cN / dtex) is the value obtained by dividing the maximum value of the load on the load-elongation curve by the fineness, and the elongation at that time is the breaking elongation (%), and the strength when the elongation is 5% is 5. % modulus (cN/dtex), and the strength when the elongation is 10% is 10% modulus ( cN /dtex).
D. Heat shrinkage stress ratio of innermost and outer layers The heat shrinkage stress is measured using a KE-II type shrinkage stress measuring device manufactured by Kanebo Engineering. An initial load of fineness × 2/30 (cN) is applied to a sample in which the yarn ends are tied in a loop of 5 cm in length, and the heat shrinkage force is measured when heated from room temperature at a temperature rising rate of 120 ° C./min. do. The highest point of the measured heat shrinkage force is taken as the heat shrinkage peak (cN), and the temperature at that time is taken as the heat shrinkage peak temperature (°C). Then, the value obtained by dividing the maximum value of the heat shrinkage force by twice the fiber fineness was defined as the heat shrinkage stress (cN/dtex), and the average value of five measurements was taken as the heat shrinkage stress. The heat absorption stress ratio (Sr) of the innermost and outer layers is obtained by the following formula 1.
Sr=Si/So Formula 1
(Sr: heat shrinkage stress ratio of the innermost and outer layers, Si: heat shrinkage stress of the innermost layer of the package [measured at a point of 1 mm winding thickness from the outer diameter of the paper tube], So: heat shrinkage stress of the outermost layer of the package [package Measure the point after 1 disassembly of the surface layer part])
E. Winding state of the fiber package The winding operability was rated as "○" if the winding shape was good, "△" if the winding was slightly broken and the amount of winding was insufficient, and "X" if the winding was severely broken or the winding was impossible.
F. Weavability and Appearance Evaluation Using the obtained polyphenylene sulfide monofilament, a 420 mesh/2.54 cm (less than 11 dtex), 22
Mesh fabrics of 5 mesh/2.54 cm (11 dtex or more and less than 21 dtex) and 150 mesh/2.54 cm (21 dtex or more and 35 dtex) were woven. At that time, the occurrence of scum on the reed and the state of breakage of warp and weft yarns were visually observed and evaluated as weaving performance. The appearance of the obtained fabric (knots, sink marks, streaks, etc.) was visually observed and evaluated as appearance evaluation. If both the weavability and the appearance evaluation were good, it was rated as "◯"; if either was poor, it was rated as "Δ";
G. Mesh Performance Evaluation The mesh fabric obtained in F is heat-set at 160° C. for 20 minutes, and the appearance of the processed mesh fabric (before and after heat-setting) is evaluated after the elongation recovery cycle. The elongation recovery cycle conforms to JIS L 1013, using an AGS-1KNG Autograph (registered trademark) tensile tester manufactured by Shimadzu Corporation, with a sample length of 20 cm, a width of 5 cm, and a constant tensile speed of 20 cm / min. Five extension recovery cycles are performed. The appearance of the mesh fabric at that time was visually observed. The case where there was no misalignment, distortion or damage was evaluated as "O", the case where there was distortion or slight damage was evaluated as "x", and the case where the presence or absence of distortion or damage could not be determined was evaluated as "△".
H. Comprehensive evaluation Regarding the items of spinning operability, weaving performance, appearance evaluation, and mesh performance evaluation, "〇" for all of the items judged as 〇, "△" for those with one or more △ and no ×, 1 item However, if there is an x, it is marked as "x".

Figure 2021161572000001
Figure 2021161572000001

破断強度、破断伸度、5、10%モジュラスなどの物性、ボビン形状、ワインダー捲き取り時の捲取張力、糸条への油脂付着率などの捲き取り、捲幅、テーパー角、綾角などの捲取条件を制御することによって、得られた実施例1~5から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージのモノフィラメントは、直接紡糸延伸法で製造でき、高強度で節の少ない品位の良いモノフィラメントであった。これらの繊維パッケージは、パッケージの捲き形状は良好で、捲き締まり、捲き崩れなどの形状不良がなく、解舒性も良いものであり、最内外層の熱収縮応力比も良く、均一で品位の良いものであった。また、テーパー部のあるパーン型パッケージに捲かれたポリフェニレンスルフィドモノフィラメントから得られたメッシュ織物は、スカムの発生がなく、タテ及びヨコの糸切れの発生がなく、外観でも、ヒケやその他の要因による筋、太糸、光沢異常など、発生の無い品位の良いものであった。さらに、強度も十分あり、寸法安定性も良好でフィルターとしての耐久性の高い品位の良いものであった。
なかでも、実施例1、5のものは、繊維物性が良好で、ヒケ発生、筋などがなく、特に優れた性能を持つポリフェニレンスルフィドのメッシュ織物が得られた。
繊維パッケージがドラム型で、綾角が大きい比較例1から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージは、ドラム型であることと綾角5°であるためと思われるが、トラバースの移動速度が速くなり、糸条がその勢いで外に流されやすくなり、綾落ちが発生しやすくなり、糸の解舒性が悪いパッケージとなった。製織の際にパッケージからの解舒性が悪いため、筋や糸切れが発生し、品位の良くないものになった。それに伴ってと思われるが、メッシュ性能もあまり良くないものであった。
繊維パッケージがドラム型の比較例2から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージは、ドラム型であるためと思われるが、比較例1より軽減されたものの綾落ちが発生しやすくなり、糸の解舒性が悪いパッケージとなった。製織性はボビンからの少し解舒性が悪いため、筋や糸切れが発生し、品位の良くないものとなった。それに伴ってと思われるが、メッシュ性能もあまり良くなかった。
繊維パッケージがドラム型に近いパーン型の比較例3から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージは、ドラム型に近いためと思われるが、比較例2より軽減されたものの綾落ちが発生しやすくなり、糸の解舒性が少し悪いパッケージとなった。製織性はボビンからの少し解舒性が悪いため、筋や糸切れが発生し、品位の良くないものとなった。それに伴って、メッシュ性能もあまり良くなかった。
テーパー角が非常に小さい比較例4から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージは、捲き形状は良好だが、テーパー角が低いため、十分な捲き量を捲くことができず、コストが悪いことや生産効率が悪くなった。このため、製織時、捲量が少ないため、ボビン切り替えによる糸つなぎでのノットの混入や作業効率の低下をきたした。
綾角が非常に小さい比較例5から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージは、捲き取りボビンの表面に寄り糸による筋が表面中央部に発生し、捲き取り中、発生し続けた。これによって、外観不良となり、解舒性が少し悪かった。このため、製織時、筋や糸切れが発生し、品位の良くないものとなった。メッシュ性能もあまり良くなかった。
綾角が大きい比較例6から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージは、テーパー部に軽度の綾落ちが発生し、糸の解舒性が悪いパッケージとなった。このため、製織時、筋や糸切れが少し発生し、品位の良くないものとなった。メッシュ性能もあまり良くないものであった。
パッケージの捲幅が小さい比較例7から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージは、捲き形状は良好だが、捲幅が低いため、十分な捲き量を捲くことができず、高コストとなり生産効率が悪くなった。このため、製織時、捲量が少ないため、ボビン切り替えによる糸つなぎでのノットの混入や作業効率の低下きたした。メッシュ性能は良好なものであった。
パッケージの捲幅が大きい比較例8から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージは、捲き形状は良好だが、最内層の解舒時、ヒケが発生しやすくなり、製織後のメッシュ織物に筋が発生し、品位の悪いものになった。
ワインダーへの捲取張力の高い比較例9から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージは、捲取張力が高いことにより、10%モジュラスが高くなり、1kg以上捲きとった時点で、ワインダーに捲き締まりが発生し、繊維パッケージを採取することができなかった。さらに、最内外層の熱収縮応力比が大きく崩れ、品位の悪いモノフィラメントとなった。
ワインダーへの捲取張力の低い比較例10から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージは、捲取張力が低いことにより、GR3とワインダー間で糸が緩み、ワインダーに捲き付けることが難しく、繊維パッケージを採取することができなかった。
糸条への油脂付着率が少ない比較例11から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージは、油脂付着率が少ないため、ゴデッドロール上の糸揺れによる糸切れが発生した。また繊維パッケージから解舒した糸条は、静電気の発生などがあり、製織工程通過性を低減させた。それに伴って、メッシュ性能もあまり良くないものであった。
糸条への油脂付着率が多い比較例12から得られたポリフェニレンスルフィドモノフィラメントの繊維パッケージは、ボビンに捲かれた糸条が滑りやすくなるため、テーパー部から糸が落ちる綾落ちが発生し、外観不良となった。また、ボビンの解舒性が悪く、製織にて、筋や糸切れ、スカムが発生し、品位の悪いものとなった。それに伴って、メッシュ性能もあまり良くないものであった。

Physical properties such as breaking strength, breaking elongation, 5% and 10% modulus, bobbin shape, winding tension during winding, winding such as oil adhesion rate to yarn, winding width, taper angle, winding angle etc. By controlling the winding conditions, the monofilaments of the fiber package of the polyphenylene sulfide monofilaments obtained from Examples 1 to 5 can be produced by a direct spinning and drawing method, and are high-strength, low-knot, and high-quality monofilaments. there were. These fiber packages have a good winding shape, no shape defects such as tight winding and collapse of winding, good unwinding properties, a good heat shrinkage stress ratio of the innermost and outer layers, and a uniform and high-quality product. It was good. In addition, the mesh fabric obtained from polyphenylene sulfide monofilament wound in a pin-shaped package with a tapered portion does not generate scum, does not generate vertical or horizontal thread breakage, and has a poor appearance due to sink marks and other factors. The quality was good with no streaks, thick threads, or abnormal gloss. Furthermore, the filter had sufficient strength, good dimensional stability, and high durability as a filter.
Among them, the fabrics of Examples 1 and 5 had good fiber physical properties, did not generate sink marks, streaks, etc., and obtained polyphenylene sulfide mesh fabrics having particularly excellent performance.
The fiber package of the polyphenylene sulfide monofilament obtained in Comparative Example 1, which has a drum type fiber package and a large winding angle, is considered to be drum type and has a winding angle of 5°, but the traverse movement speed is high. As a result, the yarn tended to be swept outside by its momentum, and the yarn was easily dropped, resulting in a package with poor yarn unwindability. Due to poor unwindability from the package during weaving, streaks and thread breakage occurred, resulting in poor quality. Although it seems to be accompanied by it, the mesh performance was not so good.
The fiber package of the polyphenylene sulfide monofilament obtained in Comparative Example 2, in which the fiber package is a drum type, is considered to be a drum type. It became a package with bad flexibility. As for the weaving property, since the unwinding property from the bobbin was slightly poor, streaks and thread breakage occurred, resulting in poor quality. Along with that, the mesh performance was not very good.
The fiber package of the polyphenylene sulfide monofilament obtained in Comparative Example 3, which has a pirn-type fiber package close to a drum type, is likely to be more similar to a drum type. , resulting in a package with slightly poor yarn unwindability. As for the weaving property, since the unwinding property from the bobbin was slightly poor, streaks and thread breakage occurred, resulting in poor quality. Along with that, the mesh performance was not so good.
The fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 4, which has a very small taper angle, has a good winding shape, but due to the low taper angle, a sufficient winding amount cannot be wound, resulting in poor cost and production. became less efficient. As a result, the amount of winding during weaving is small, and knots are mixed in at the yarn splicing due to bobbin switching, and work efficiency is lowered.
In the fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 5, which had a very small winding angle, streaks due to twisted yarn occurred on the surface of the winding bobbin at the center of the surface and continued to occur during winding. As a result, the appearance was poor, and the unwindability was slightly poor. As a result, streaks and thread breakage occurred during weaving, resulting in poor quality. The mesh performance was also not very good.
The fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 6, which had a large winding angle, suffered slight twill drop in the tapered portion, resulting in a poor yarn unwindability. For this reason, during weaving, streaks and yarn breakage occurred a little, resulting in poor quality. The mesh performance was also not very good.
The fiber package of polyphenylene sulfide monofilament obtained from Comparative Example 7, which has a small package winding width, has a good winding shape, but the winding width is small, so a sufficient winding amount cannot be wound, resulting in high cost and low production efficiency. It got worse. As a result, the amount of winding is small during weaving, and knots are mixed in at the yarn splicing due to bobbin switching, and work efficiency is lowered. Mesh performance was good.
The fiber package of polyphenylene sulfide monofilament obtained from Comparative Example 8, which has a large winding width of the package, has a good winding shape, but sink marks are likely to occur when the innermost layer is unwound, and streaks are generated in the mesh fabric after weaving. and became inferior.
The fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 9, which has a high winding tension on the winder, has a 10% higher modulus due to the high winding tension. occurred and the fiber package could not be collected. Furthermore, the thermal shrinkage stress ratio of the innermost and outer layers collapsed greatly, resulting in a poor quality monofilament.
The fiber package of polyphenylene sulfide monofilament obtained from Comparative Example 10, which has a low winding tension on the winder, has a low winding tension. could not be obtained.
The fiber package of the polyphenylene sulfide monofilament obtained from Comparative Example 11, which had a low oil adhesion rate to the yarn, had a low oil adhesion rate, so yarn breakage occurred due to yarn swinging on the godded roll. In addition, the yarn unwound from the fiber package generates static electricity, etc., and reduces the weaving process passability. Along with this, the mesh performance was not so good.
In the fiber package of the polyphenylene sulfide monofilament obtained in Comparative Example 12, which has a high oil adhesion rate on the yarn, the yarn wound on the bobbin becomes slippery, so that the yarn falls off from the tapered portion. became defective. In addition, the unwindability of the bobbin was poor, and streaks, thread breakage, and scum occurred during weaving, resulting in poor quality. Along with this, the mesh performance was not so good.

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