JPH0967730A - Aramid fiber twisted yarn and method for producing the same - Google Patents
Aramid fiber twisted yarn and method for producing the sameInfo
- Publication number
- JPH0967730A JPH0967730A JP24079695A JP24079695A JPH0967730A JP H0967730 A JPH0967730 A JP H0967730A JP 24079695 A JP24079695 A JP 24079695A JP 24079695 A JP24079695 A JP 24079695A JP H0967730 A JPH0967730 A JP H0967730A
- Authority
- JP
- Japan
- Prior art keywords
- aramid fiber
- twisted
- twisted yarn
- yarn
- fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Artificial Filaments (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
(57)【要約】
【課題】 本発明の課題はアラミド系繊維を用いて高い
強力を有する撚糸を提供することにある。
【解決手段】 アラミド系繊維を公定水分率以下の状態
で、撚係数Ｔが１．０〜１０以上になるように撚糸す
る。(57) Abstract: An object of the present invention is to provide a twisted yarn having high tenacity using an aramid fiber. SOLUTION: An aramid fiber is twisted with a twist coefficient T of 1.0 to 10 or more in a state of an official moisture regain or less.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は高強力かつ高弾性率
を有するアラミド系繊維撚糸およびその製造方法に関す
る。TECHNICAL FIELD The present invention relates to an aramid fiber twisted yarn having high tenacity and high elastic modulus, and a method for producing the same.
【０００２】[0002]
【従来の技術】アラミド系繊維は元来高強力、高弾性率
であり、優れた耐熱性を有するので、従来からコード、
ロープ、防護衣料などに利用されている。特にコードや
ベルトなどのゴム補強材用途では撚糸コードとして使用
されている。2. Description of the Related Art Since aramid fibers are originally high in strength and high in elastic modulus and have excellent heat resistance, they have been
Used for ropes and protective clothing. In particular, it is used as a twisted cord in rubber reinforcement applications such as cords and belts.
【０００３】しかし、特にパラ系アラミド繊維は剛性が
高いため、撚糸後のコード強力が著しく低下するという
問題がある。However, since para-aramid fibers have high rigidity, there is a problem that the cord strength after twisting is significantly reduced.
【０００４】これに対しては、撚係数が２以上で撚糸
し、撚糸した後に１００〜６００℃の温度下で緊張熱処
理することが知られている（特開平６−１３６６３０号
公報）。On the other hand, it is known that a twisting yarn having a twisting coefficient of 2 or more is twisted and then subjected to a tension heat treatment at a temperature of 100 to 600 ° C. (JP-A-6-136630).
【０００５】[0005]
【発明が解決しようとする課題】しかし、特開平６−１
３６６３０号公報では繊維を２００〜４００℃の高温下
でかつ高い張力下で加工処理するので設備的・経済的に
不利である。またポリパラフェニレンテレフタラミド
（ＰＰＴＡ）繊維では緊張下での熱処理による撚糸コー
ド強力の向上は期待できない。However, Japanese Patent Application Laid-Open No.
According to Japanese Patent No. 36630, fibers are processed at a high temperature of 200 to 400 ° C. and under a high tension, which is disadvantageous in terms of equipment and economy. Further, in the case of polyparaphenylene terephthalamide (PPTA) fiber, improvement in the strength of the twisted cord due to the heat treatment under tension cannot be expected.
【０００６】一方、パラ系アラミド繊維の撚糸コードの
強力が低下し易い原因として、ヤーンあるいは単繊維が
引き揃えにくいということがある。従来からこの撚糸強
力を改善する手段として、繊維間の摩擦を低減させる油
剤を付与して均一な撚糸が行われるようにしたが、撚糸
コードの強力は満足できる程度には至っていないのが現
状である。On the other hand, the reason why the strength of the twisted cord of para-aramid fiber is likely to be lowered is that it is difficult to align the yarns or single fibers. Conventionally, as a means for improving the strength of the twisted yarn, an oil agent for reducing friction between fibers has been added so that the twisted yarn is uniformly twisted, but the strength of the twisted yarn cord is not yet satisfactory. is there.
【０００７】本発明の課題はアラミド系繊維を用いて高
い強力を有する撚糸を提供することにある。An object of the present invention is to provide a twisted yarn having high tenacity using aramid fibers.
【０００８】[0008]
【課題を解決するための手段】即ち、本発明は、アラミ
ド系繊維を公定水分率以下の状態で、撚係数Ｔが１．０
〜１０以上になるように撚糸したことを特徴とするアラ
ミド系繊維撚糸であり、また、公定水分率以上の状態の
アラミド系繊維を１００℃以下で、公定水分率以下まで
乾燥した後、撚係数Ｔが１．０〜１０以上になるように
撚糸することを特徴とするアラミド系繊維撚糸の製造方
法である。That is, according to the present invention, the twist coefficient T is 1.0 when the aramid fiber is below the official moisture regain.
It is an aramid fiber twisted yarn characterized by being twisted so as to be 10 or more, and the aramid fiber in a state of not less than the official moisture regain is dried at 100 ° C. or less to the official moisture regain or less and then the twist coefficient. A method for producing an aramid fiber twisted yarn, which comprises twisting so that T becomes 1.0 to 10 or more.
【０００９】ただし、 Ｔ＝０．００３４８×長さ１０ｃｍ当たりの撚数×（ヤ
ーン全繊度）1/2 以下、本発明の構成を具体的に説明する。However, T = 0.00348 × twist number per length of 10 cm × (total yarn fineness) 1/2 or less, and the constitution of the present invention will be specifically described.
【００１０】本発明におけるアラミド系繊維とは、芳香
族系のアミド基を有する重合体からなる繊維であれば特
に限定されないが、中でもパラ系のアラミド繊維が好ま
しい。そして、特に好ましいのは下記繰返し単位（Ｉ）
８５モル％以上で構成されているアラミド系繊維であ
る。The aramid fiber in the present invention is not particularly limited as long as it is a fiber made of a polymer having an aromatic amide group, but para aramid fiber is preferable among them. And especially preferred are the following repeating units (I)
It is an aramid fiber composed of 85 mol% or more.
【００１１】[0011]
【化２】 本発明における公定水分率とは、ＪＩＳに規定されてい
るもので、たとえばパラフェニレンテレフタラミドの公
定水分率は６．５％である。Embedded image The official moisture content in the present invention is defined in JIS, and for example, the official moisture content of paraphenylene terephthalamide is 6.5%.
【００１２】本発明における撚糸とは、単糸を複数本揃
えたヤーンを撚ること、あるいは撚ったもの（コード）
を意味する。この場合、ヤーンは１本でもよいが２本以
上の方が好ましい。The twisted yarn in the present invention means a yarn obtained by twisting a plurality of single yarns or twisted (cord)
Means In this case, one yarn may be used, but two or more yarns are preferable.
【００１３】本発明における撚係数Ｔとは、撚りの強さ
を示すもので下記の式で表わされる。The twist coefficient T in the present invention indicates the strength of twist and is represented by the following equation.
【００１４】Ｔ＝０．００３４８×長さ１０ｃｍ当たり
の撚数×（ヤーン全繊度）1/2 本発明においては、アラミド系繊維を公定水分率以下の
状態まで乾燥する必要がある。 特に、水分率(％)が
（公定水分率−１）％以下になると本発明の効果が著し
い。繊維中の水分率が公定水分率以下のアラミド系繊維
を撚糸することによって、高い強力を有する撚糸構造体
を得ることができる。T = 0.00348 × number of twists per length of 10 cm × (yarn total fineness) 1/2 In the present invention, it is necessary to dry the aramid fiber to a state of not more than the official moisture regain. In particular, the effect of the present invention is remarkable when the water content (%) is (official water content-1)% or less. By twisting an aramid fiber having a moisture content in the fiber of not more than the official moisture content, a twisted structure having high strength can be obtained.
【００１５】撚係数は１．０〜１０が必要で、特に２．
０〜６．０が好ましい。使用されるヤーンの全繊度は１
００〜１００００デニールが好ましい。A twist coefficient of 1.0 to 10 is required, and particularly 2.
0 to 6.0 is preferable. The total fineness of the yarn used is 1
00 to 10,000 denier is preferred.
【００１６】撚糸コードの作成法としては片撚り、諸撚
りのいずれでもよいが、特に好ましいのは２本以上の合
糸の場合である。The twisted cord may be produced by either single twisting or ply twisting, but particularly preferred is the case of two or more twisted yarns.
【００１７】水分率低減化方法は特に限定されず、熱処
理（遠赤外線照射を含む）、減圧乾燥等の方法が採用で
きるが、特に、熱処理の場合、処理温度は１００℃以下
が好ましく、さらに好ましくは７０〜１００℃である。
処理温度が高すぎると原糸の強力が低下するので好まし
くない。The method for reducing the water content is not particularly limited, and methods such as heat treatment (including irradiation with far infrared rays) and reduced pressure drying can be adopted. In particular, in the case of heat treatment, the treatment temperature is preferably 100 ° C. or lower, more preferably Is 70 to 100 ° C.
If the treating temperature is too high, the tenacity of the raw yarn decreases, which is not preferable.
【００１８】水分率低減化時に張力は特にかける必要は
なく、無緊張下で行ってもよい。It is not necessary to apply tension when reducing the water content, and tension may be applied without tension.
【００１９】なお、本発明の方法はオフラインあるいは
オンラインのどちらで実施してもよい。 得られた撚糸
は、表面を被覆、薬液処理することによって強力を保持
することもできる。It should be noted that the method of the present invention may be performed either offline or online. The obtained twisted yarn can also retain its strength by coating the surface and treating with a chemical solution.
【００２０】[0020]
【発明の実施の形態】以下、実施例を挙げて本発明を具
体的に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to examples.
【００２１】[0021]
実施例１ 特公昭５５−１４１６７号公報に記載されている方法に
よりポリパラフェニレンテレフタラミド(ＰＰＴＡ)得、
これからなる繊維を製糸しした。Example 1 Polyparaphenylene terephthalamide (PPTA) was obtained by the method described in JP-B-55-14167.
Fibers made of this were spun.
【００２２】標)繊維 本実施例１で用いた原糸は単糸1000本からなる全繊度１
５００デニールのマルチフィラメントヤーンである。ヤ
ーンの強度は２６ｇ／ｄで、切断伸度は３％であった。
このヤーンを７０℃、無緊張下で所定時間熱処理し、水
分率の異なるヤーンサンプルを得た。Standard) Fiber The raw yarn used in this Example 1 is 1000 single yarns in total fineness 1
It is a 500 denier multifilament yarn. The strength of the yarn was 26 g / d and the breaking elongation was 3%.
This yarn was heat-treated at 70 ° C. under no tension for a predetermined time to obtain yarn samples having different moisture contents.
【００２３】そのなかで、同じ水分率であるヤーンを２
本用意し、この２本のヤーンを引き揃えて１０ｃｍあた
り１２．７回の撚りをかけて撚糸コードを作成した。Among them, two yarns having the same moisture content were used.
This was prepared and these two yarns were aligned and twisted 12.7 times per 10 cm to prepare a twisted cord.
【００２４】なお、使用したヤーンの公定水分率は６．
５％である。The official moisture regain of the used yarn is 6.
5%.
【００２５】コードの引張り試験における破断強力の結
果を表１に示す。The results of breaking strength in the tensile test of the cord are shown in Table 1.
【００２６】[0026]
【表１】 なお、該撚糸コードの撚係数Ｔは２．４と計算された。[Table 1] The twist coefficient T of the twisted cord was calculated to be 2.4.
【００２７】表１から明かなように水分率が６．５〜
７．５％では、撚糸コード強力は７２ｋｇであるが、水
分率を低減させることによって撚糸コード強力が約７６
ｋｇへと向上している。As is apparent from Table 1, the water content is 6.5.
At 7.5%, the twisted cord strength is 72 kg, but by reducing the water content, the twisted cord strength is about 76 kg.
It has improved to kg.
【００２８】実施例２ 実施例１で作成したヤーンを常温で減圧乾燥処理し、水
分率の異なるサンプルを得た。同じ水分率であるヤーン
を２本用意し、この２本のヤーンを引き揃えて１０ｃｍ
あたり１２．７回の撚りをかけて撚糸コードを作成し
た。Example 2 The yarn prepared in Example 1 was dried under reduced pressure at room temperature to obtain samples having different water contents. Prepare two yarns with the same moisture content, and align these two yarns to obtain 10 cm
A twisted cord was produced by twisting 12.7 times per twist.
【００２９】コードの引張り試験における破断強力の結
果を表２に示す。The results of breaking strength in the tensile test of the cord are shown in Table 2.
【表２】 表２から明かなように熱処理を行わなくても、水分率を
低減させることによって、撚糸コード強力が向上してい
る。[Table 2] As is clear from Table 2, the strength of the twisted cord is improved by reducing the water content without performing heat treatment.
【００３０】実施例３ 実施例１と同様に作成、熱処理したヤーンを２本用意
し、各々のヤーンに１０ｃｍあたり３５回の下撚を入れ
た後に、２本揃えて逆方向に１０ｃｍあたり３５回の上
撚を付与して撚糸コードを作成した。Example 3 Two yarns prepared and heat-treated in the same manner as in Example 1 were prepared, and each yarn was subjected to undertwisting 35 times per 10 cm, and then two yarns were aligned and 35 times per 10 cm in the opposite direction. Twisted yarn cord was prepared by applying the upper twist.
【００３１】コードの引張り試験における破断強力の結
果を表３に示す。The results of breaking strength in the tensile test of the cord are shown in Table 3.
【００３２】[0032]
【表３】 なお、この撚糸コードの撚係数Ｔは６．７と計算され
る。[Table 3] The twist coefficient T of this twisted yarn cord is calculated to be 6.7.
【００３３】撚糸強力は撚数が高くなるほど低下の度合
いが著しくなるので、実施例３の破断強力は実施例１の
破断強力より低くなっているが、水分率を低減すること
によって撚糸コード強力が向上していることがわかる。The higher the number of twists, the more the twist strength decreases, so that the breaking strength of Example 3 is lower than that of Example 1, but the twist cord strength is reduced by reducing the water content. You can see that it is improving.
【００３４】[0034]
【発明の効果】本発は明簡単な工程を経るだけで、強力
の優れたアラミド系繊維撚糸を得ることができる。EFFECTS OF THE INVENTION According to the present invention, an aramid fiber twisted yarn having excellent tenacity can be obtained only by going through a simple process.
Claims (5)
で、撚係数Ｔが１．０〜１０以上になるように撚糸した
ことを特徴とするアラミド系繊維撚糸。ただし、 Ｔ＝０．００３４８×長さ１０ｃｍ当たりの撚数×（ヤ
ーン全繊度）1/2 1. An aramid fiber twisted yarn obtained by twisting an aramid fiber so as to have a twist coefficient T of 1.0 to 10 or more in a state of not more than an official moisture regain. However, T = 0.00348 x number of twists per 10 cm length x (total yarn fineness) 1/2
あることを特徴とする請求項１記載のアラミド繊維系撚
糸。2. The aramid fiber-based twisted yarn according to claim 1, wherein the aramid fiber is a para-aramid fiber.
８５モル％以上で構成されていることを特徴とする請求
項１記載のアラミド系繊維撚糸。 【化１】 3. An aramid fiber having the following repeating unit (I):
The aramid fiber twisted yarn according to claim 1, wherein the twisted yarn is 85 mol% or more. Embedded image
減処理した前後における繊維の破断強力比（＝水分率低
減処理後の強力／水分率低減処理前の強力）が０．８５
以上であるアラミド系繊維を用いたことを特徴とする請
求項１記載のアラミド系繊維撚糸4. The breaking strength ratio (= strength after moisture content reduction treatment / strength before moisture content reduction treatment) of the fiber before and after the moisture content of the fiber is reduced to below the official moisture content of 0.85.
The aramid fiber twisted yarn according to claim 1, wherein the aramid fiber described above is used.
を１００℃以下で、公定水分率以下まで乾燥した後、撚
係数Ｔが１．０〜１０以上になるように撚糸することを
特徴とするアラミド系繊維撚糸の製造方法。ただし、 Ｔ＝０．００３４８×長さ１０ｃｍ当たりの撚数×（ヤ
ーン全繊度）1/2 5. An aramid-based fiber in a state where the moisture content is higher than the official moisture regain is dried at 100 ° C. or lower until the moisture regain is lower than the official moisture regain, and then twisted so that the twist coefficient T becomes 1.0 to 10 or more. A method for producing twisted aramid fiber. However, T = 0.00348 x number of twists per 10 cm length x (total yarn fineness) 1/2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24079695A JP3527988B2 (en) | 1995-08-25 | 1995-08-25 | Method for producing twisted aramid fiber cord |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24079695A JP3527988B2 (en) | 1995-08-25 | 1995-08-25 | Method for producing twisted aramid fiber cord |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0967730A true JPH0967730A (en) | 1997-03-11 |
| JP3527988B2 JP3527988B2 (en) | 2004-05-17 |
Family
ID=17064824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24079695A Expired - Lifetime JP3527988B2 (en) | 1995-08-25 | 1995-08-25 | Method for producing twisted aramid fiber cord |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3527988B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001089946A (en) * | 1999-07-22 | 2001-04-03 | Du Pont Toray Co Ltd | Aromatic polyamide fiber cord for rubber reinforcement |
| WO2006117964A1 (en) * | 2005-04-27 | 2006-11-09 | Bridgestone Corporation | Method of modifying organic fiber cord |
| JP2018154950A (en) * | 2017-03-21 | 2018-10-04 | 東レ・デュポン株式会社 | Method for producing high strength dip cord |
| JP2025166216A (en) * | 2021-03-30 | 2025-11-05 | 東レ・デュポン株式会社 | Rubber reinforcement fiber cord |
-
1995
- 1995-08-25 JP JP24079695A patent/JP3527988B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001089946A (en) * | 1999-07-22 | 2001-04-03 | Du Pont Toray Co Ltd | Aromatic polyamide fiber cord for rubber reinforcement |
| WO2006117964A1 (en) * | 2005-04-27 | 2006-11-09 | Bridgestone Corporation | Method of modifying organic fiber cord |
| JP2018154950A (en) * | 2017-03-21 | 2018-10-04 | 東レ・デュポン株式会社 | Method for producing high strength dip cord |
| JP2025166216A (en) * | 2021-03-30 | 2025-11-05 | 東レ・デュポン株式会社 | Rubber reinforcement fiber cord |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3527988B2 (en) | 2004-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE60203547T2 (en) | Wrapped cord | |
| JP2530802B2 (en) | High strength aromatic amide spun yarn | |
| JP2869025B2 (en) | Tensile body and belt for belt | |
| JP4801675B2 (en) | Rubber reinforcement cord | |
| JPH076570B2 (en) | Power transmission belt | |
| WO2021066385A1 (en) | Hybrid tire cord and method for manufacturing thereof | |
| JP3527988B2 (en) | Method for producing twisted aramid fiber cord | |
| KR100588385B1 (en) | Lyocell tire cord and its manufacturing method | |
| DE1685954C3 (en) | Fiberglass cord | |
| CN113260747A (en) | Hybrid tire cord having high adhesion to rubber and excellent fatigue resistance, and method for producing same | |
| JPH11217727A (en) | Polyparaphenylene terephthalamide fiber and method for producing the same | |
| EP1101843B1 (en) | Polyparaphenylene terephthalamide fiber and method for producing the same | |
| JP2786777B2 (en) | Power transmission belt | |
| JP2006161225A (en) | Fiber cord for rubber reinforcement and hose | |
| KR910004984B1 (en) | Electric belt with tension member | |
| US6348263B1 (en) | Polyparaphenylene terephthalamide fiber and method for producing the same | |
| US3429117A (en) | Composite nylon continuous filament yarns | |
| JP2571526B2 (en) | Power transmission belt core wire and power transmission belt using the same | |
| KR20210086467A (en) | Para-aramid staple fiber and manufacturing method of aramid spun yarns application for the high speed carding process | |
| JPH06136630A (en) | Production of aramid twist yarn cord | |
| JPH0925141A (en) | Glass fiber processing method and processing apparatus | |
| JP3685270B2 (en) | Polybenzazole code processing method | |
| JP4205526B2 (en) | Synthetic fiber cord for rubber reinforcement | |
| JPH02104716A (en) | Particular high-tenacity monofilament | |
| JPS636127A (en) | Dip cord for reinforcing rubber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20040105 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20040203 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040206 |
|
| R150 | Certificate of patent (=grant) or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| 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 (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100305 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 7 Free format text: PAYMENT UNTIL: 20110305 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 7 Free format text: PAYMENT UNTIL: 20110305 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 9 Free format text: PAYMENT UNTIL: 20130305 |