JPS6254882B2 - - Google Patents
Info
- Publication number
- JPS6254882B2 JPS6254882B2 JP12189177A JP12189177A JPS6254882B2 JP S6254882 B2 JPS6254882 B2 JP S6254882B2 JP 12189177 A JP12189177 A JP 12189177A JP 12189177 A JP12189177 A JP 12189177A JP S6254882 B2 JPS6254882 B2 JP S6254882B2
- Authority
- JP
- Japan
- Prior art keywords
- monofilament
- melt index
- weight
- molding
- less
- 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
Links
- 229920001903 high density polyethylene Polymers 0.000 claims description 8
- 239000004700 high-density polyethylene Substances 0.000 claims description 8
- RXPKHKBYUIHIGL-UHFFFAOYSA-L calcium;12-hydroxyoctadecanoate Chemical compound [Ca+2].CCCCCCC(O)CCCCCCCCCCC([O-])=O.CCCCCCC(O)CCCCCCCCCCC([O-])=O RXPKHKBYUIHIGL-UHFFFAOYSA-L 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000011342 resin composition Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 description 14
- 238000001125 extrusion Methods 0.000 description 8
- 239000000155 melt Substances 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Artificial Filaments (AREA)
Description
本発明はモノフイラメントの製造方法に関し、
特に、高強力で表面状態に優れたポリエチレンモ
ノフイラメントを成形性良く得ることのできるモ
ノフイラメントの製造方法に関する。
従来ポリエチレンモノフイラメントはロープ、
漁網等に使用されているが、該モノフイラメント
は成形時における押出温度、押出速度等の成形条
件にその成形性、物性等が大きく影響される。即
ち押出温度が低い場合や或る一定の剪断速度以上
の押出速度の場合、該モノフイラメントの成形
性、物性が著るしく低下ししかも表面が肌荒れを
呈してこの成形条件範囲は非常に狭く制限される
という問題があつた。
本発明は上記の問題を解決し、さらに曳糸性に
優れ高強力のポリエチレンモノフイラメントを得
ることのできるモノフイラメントの成形技術を提
供することを目的とし、その要旨は、メルトイン
デツクス（JISK7210にしたがい、条件が４で測
定）2g／10min以下でハイロードメルトインデツ
クス（JISK7210にしたがい、条件が７で測
定）／メルトインデツクス40以下の高密度ポリエ
チレン100重量部及びヒドロキシステアリン酸カ
ルシウム0.01〜1.5重量部からなる樹脂組成物を
溶融押出し、延伸し、モノフイラメントを得るこ
とを特徴とするモノフイラメントの製造方法に係
るものである。
本発明に用いられる高密度ポリエチレンはメル
トインデツクスが2g／10min以下であり、この値
を越えると得られるモノフイラメントの強度が不
十分となる。またハイロードメルトインデツク
ス／メルトインデツクスは40以下であり即ち分子
量分布がシヤープであり、この値を越えると該モ
ノフイラメントの十分な直線強度、結節強度が得
られないばかりでなく、曳糸性が低下した成形の
際繊度を変更する度にその繊度に合つたノズル径
のノズルに変更しなければノズル下で糸切れをす
るという問題もある。なおポリエチレンとして
は、成形性、強度から高密度ポリエチレンが好ま
しい。メルトインデツクスが2g／10min以下であ
り、かつハイロードメルトインデツクス／メルト
インデツクスが40以下の高密度ポリエチレンにつ
いては、特開昭53−78287号および同54−21483号
の各公報明細書に詳細に記載されている。
本発明においてはさらにヒドロキシステアリン
酸カルシウムが不可欠であり、これを欠くと該モ
ノフイラメントの成形時にその表面に肌荒れを呈
し易く、肌荒れを防ぐためには押出温度範囲、押
出速度範囲を狭くせざるを得なくなつてしまう。
ヒドロキシステアリン酸カルシウムが0.01重量部
未満では肌荒れ防止効果が不足し、1.5重量部を
越えると成形時に目結りが生じ易く該モノフイラ
メントが白濁する。
例えばヒドロキシステアリン酸カルシウムを用
いない場合は、メルトインデツクス1.2、ハイロ
ードメルトインデツクス／メルトインデツクス25
の高密度ポリエチレンでのモノフイラメント成形
時に該モノフイラメントの表面の肌荒れを防ぐた
めには成形温度を330℃以上に上げる必要があ
り、通常の成型機ではそこ迄昇温させ難く仮に昇
温できたとしても高温による樹脂の劣化、発煙、
延伸切れ、強度低下等が起る。
これに対し本発明によれば、メルトインデツク
ス1.2、ハイロードメルトインデツクス／メルト
インデツクス25の高密度ポリエチレン100重量部
にヒドロキシステアリン酸カルシウム0.5重量部
を加えた場合は成形温度は220℃以上で良くその
ため成形温度範囲が広くなり、また通常の高密度
ポリエチレンモノフイラメントの成形温度範囲で
ある270〜290℃位での成形においては2000sec-1
以上の高速押出でも成形可能であり、曳糸性、表
面状態の優れた高強力モノフイラメントが得られ
る。
なお本発明に使用される樹脂組成物に必要に応
じ、酸化防止剤、紫外線吸収剤のような添加剤、
着色剤等を配合しても良い。
以下に実施例、比較例を挙げて本発明をさらに
詳細に説明する。
実施例１、２、３ 比較例１、２、３
第１表に示す樹脂組成物を用いて各々下記条件
でモノフイラメントを成形し、紡糸性、延伸性、
物性を試験し第１表に示すような結果を得た。
押出機；40m／ｍφ
押出温度；C1160℃、C2250℃、C3290℃、
H290℃、D290℃
ノズル；1.0m／ｍφ×10m／ｍL×40H
エアギヤツプ；５cm冷却温度；30℃
湿式延伸方式 延伸温度；98℃
延伸速度（高速側）；
120m／min
延伸倍率；10倍
設定デニール；350デニール
The present invention relates to a method for manufacturing a monofilament,
In particular, the present invention relates to a method for producing a monofilament that can yield a polyethylene monofilament with high strength and excellent surface condition with good moldability. Conventional polyethylene monofilament is used for rope,
The monofilament is used for fishing nets, etc., but its moldability, physical properties, etc. are greatly affected by molding conditions such as extrusion temperature and extrusion speed during molding. That is, when the extrusion temperature is low or the extrusion speed exceeds a certain shear rate, the moldability and physical properties of the monofilament are significantly reduced, and the surface becomes rough, so that the range of molding conditions is extremely narrowly limited. There was a problem with being exposed. The purpose of the present invention is to solve the above-mentioned problems and provide a monofilament forming technology that can obtain a polyethylene monofilament with excellent stringability and high strength. Therefore, 100 parts by weight of high-density polyethylene with a melt index of 40 or less and 0.01 to 1.5 parts by weight of calcium hydroxystearate at a high load melt index of 2 g/10 min or less (measured under conditions 7)/melt index 40 or less The present invention relates to a method for producing a monofilament, which comprises melt-extruding and stretching a resin composition consisting of 100% of the total amount of the monofilament, and obtaining a monofilament. The high-density polyethylene used in the present invention has a melt index of 2 g/10 min or less, and if this value is exceeded, the strength of the monofilament obtained will be insufficient. In addition, the high load melt index/melt index is 40 or less, which means that the molecular weight distribution is sharp.If this value is exceeded, not only the monofilament cannot obtain sufficient linear strength and knot strength, but also has poor spinnability. There is also the problem that threads will break under the nozzle unless the nozzle is changed to a nozzle diameter that matches the fineness each time the fineness is changed during molding where the fineness has decreased. Note that high-density polyethylene is preferable as the polyethylene in terms of moldability and strength. Regarding high-density polyethylene with a melt index of 2 g/10 min or less and a high load melt index/melt index of 40 or less, the specifications of JP-A-53-78287 and JP-A-54-21483 are as follows. Described in detail. Calcium hydroxystearate is further essential in the present invention, and without it, the surface of the monofilament tends to become rough during molding, and in order to prevent roughness, the extrusion temperature range and extrusion speed range must be narrowed. I get used to it.
If the amount of calcium hydroxystearate is less than 0.01 part by weight, the effect of preventing rough skin will be insufficient, and if it exceeds 1.5 parts by weight, knots will easily occur during molding and the monofilament will become cloudy. For example, if calcium hydroxystearate is not used, the melt index is 1.2, and the high load melt index/melt index is 25.
In order to prevent the surface of the monofilament from becoming rough when molding a monofilament using high-density polyethylene, it is necessary to raise the molding temperature to 330°C or higher. Deterioration of the resin due to high temperatures, smoke generation,
Stretching breaks, strength decreases, etc. occur. On the other hand, according to the present invention, when 0.5 parts by weight of calcium hydroxystearate is added to 100 parts by weight of high-density polyethylene with a melt index of 1.2 and a high-load melt index/melt index of 25, the molding temperature is 220°C or higher. As a result, the molding temperature range becomes wider, and when molding is performed at around 270 to 290℃, which is the molding temperature range for normal high-density polyethylene monofilament, the molding temperature range is 2000 sec -1.
Molding is also possible by the above-mentioned high-speed extrusion, and a high-strength monofilament with excellent spinnability and surface condition can be obtained. Additionally, additives such as antioxidants and ultraviolet absorbers may be added to the resin composition used in the present invention, if necessary.
A coloring agent or the like may be added. The present invention will be explained in more detail by giving Examples and Comparative Examples below. Examples 1, 2, 3 Comparative Examples 1, 2, 3 Using the resin compositions shown in Table 1, monofilaments were molded under the following conditions, and the spinnability, stretchability,
The physical properties were tested and the results shown in Table 1 were obtained. Extruder: 40m/mφ Extrusion temperature: C 1 160℃, C 2 250℃, C 3 290℃,
H290℃, D290℃ Nozzle; 1.0m/mφ x 10m/m L x 40 H air gap; 5cm Cooling temperature: 30℃ Wet stretching method Stretching temperature: 98℃ Stretching speed (high speed side);
120m/min Stretching ratio: 10x Setting denier: 350 denier
【表】【table】
Claims (1)
ードメルトインデツクス／メルトインデツクス40
以下の高密度ポリエチレン100重量部及びヒドロ
キシステアリン酸カルシウム0.01〜1.5重量部か
らなる樹脂組成物を溶融押出し、延伸し、モノフ
イラメントを得ることを特徴とする直線強度が
7.80〜9.50g/dであるモノフイラメントの製造方
法。1 High load melt index/melt index 40 at melt index 2g/10min or less
A resin composition consisting of 100 parts by weight of high-density polyethylene and 0.01 to 1.5 parts by weight of calcium hydroxystearate as shown below is melt-extruded and stretched to obtain a monofilament with linear strength.
A method for producing monofilament having a weight of 7.80 to 9.50 g/d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12189177A JPS5456644A (en) | 1977-10-13 | 1977-10-13 | Resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12189177A JPS5456644A (en) | 1977-10-13 | 1977-10-13 | Resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5456644A JPS5456644A (en) | 1979-05-07 |
| JPS6254882B2 true JPS6254882B2 (en) | 1987-11-17 |
Family
ID=14822455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12189177A Granted JPS5456644A (en) | 1977-10-13 | 1977-10-13 | Resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5456644A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH059275Y2 (en) * | 1986-05-01 | 1993-03-08 | ||
| JPH0537748Y2 (en) * | 1986-12-25 | 1993-09-24 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5841908A (en) * | 1981-09-04 | 1983-03-11 | Showa Denko Kk | Production of high-strength monofilament |
| JPS58186606A (en) * | 1982-04-26 | 1983-10-31 | Showa Denko Kk | Polyethylene monofilament and preparation thereof |
-
1977
- 1977-10-13 JP JP12189177A patent/JPS5456644A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH059275Y2 (en) * | 1986-05-01 | 1993-03-08 | ||
| JPH0537748Y2 (en) * | 1986-12-25 | 1993-09-24 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5456644A (en) | 1979-05-07 |
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