JPH01229807A - High-elastic modulus polyester fiber with low shrinkage - Google Patents
High-elastic modulus polyester fiber with low shrinkageInfo
- Publication number
- JPH01229807A JPH01229807A JP5088888A JP5088888A JPH01229807A JP H01229807 A JPH01229807 A JP H01229807A JP 5088888 A JP5088888 A JP 5088888A JP 5088888 A JP5088888 A JP 5088888A JP H01229807 A JPH01229807 A JP H01229807A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- fibers
- present
- polyester
- elastic modulus
- 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
- 239000000835 fiber Substances 0.000 title claims abstract description 81
- 229920000728 polyester Polymers 0.000 title claims abstract description 37
- 230000005484 gravity Effects 0.000 claims abstract description 12
- LLLVZDVNHNWSDS-UHFFFAOYSA-N 4-methylidene-3,5-dioxabicyclo[5.2.2]undeca-1(9),7,10-triene-2,6-dione Chemical compound C1(C2=CC=C(C(=O)OC(=C)O1)C=C2)=O LLLVZDVNHNWSDS-UHFFFAOYSA-N 0.000 claims abstract description 6
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 claims abstract description 5
- WXNZTHHGJRFXKQ-UHFFFAOYSA-N 4-chlorophenol Chemical compound OC1=CC=C(Cl)C=C1 WXNZTHHGJRFXKQ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000012046 mixed solvent Substances 0.000 claims abstract description 4
- 206010027146 Melanoderma Diseases 0.000 claims abstract 2
- 238000005520 cutting process Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 abstract description 18
- 239000005060 rubber Substances 0.000 abstract description 18
- 230000000704 physical effect Effects 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 5
- 230000003014 reinforcing effect Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 8
- -1 polyethylene terephthalate Polymers 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 229920006240 drawn fiber Polymers 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 238000001988 small-angle X-ray diffraction Methods 0.000 description 3
- 238000000235 small-angle X-ray scattering Methods 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- MMINFSMURORWKH-UHFFFAOYSA-N 3,6-dioxabicyclo[6.2.2]dodeca-1(10),8,11-triene-2,7-dione Chemical group O=C1OCCOC(=O)C2=CC=C1C=C2 MMINFSMURORWKH-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000006224 matting agent Substances 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 1
- HRRDCWDFRIJIQZ-UHFFFAOYSA-N naphthalene-1,8-dicarboxylic acid Chemical compound C1=CC(C(O)=O)=C2C(C(=O)O)=CC=CC2=C1 HRRDCWDFRIJIQZ-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000011297 pine tar Substances 0.000 description 1
- 229940068124 pine tar Drugs 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Artificial Filaments (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Chemical Treatment Of Fibers During Manufacturing Processes (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ポリエステル繊維に関し、更に詳しくは、高
強力・高弾性率でかつ寸法安定性、耐疲労性、が著しく
改善されたゴム補強用に適したポリエステル繊維に関す
る。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to polyester fibers, and more particularly, to polyester fibers for rubber reinforcement that have high strength, high modulus, and significantly improved dimensional stability and fatigue resistance. Regarding polyester fiber suitable for.
（従来の技術）
ポリエステル繊維、特にポリエチレンテレフタレート繊
維はその力学的性質及び熱的性質が優れていることから
、衣料用のみならずタイヤコード、コンベヤーベルト、
■−ベルト、シートベルト、ホース、ミシン糸等の工業
用用途にも広範に使用されている。特に昨今は衣料用に
比して工業用繊維、特にゴム構造物補強用繊維の比重が
益々高（なり、これに伴いかかる繊維としての要求特性
も一層厳しく要求されるようになってきた。(Prior Art) Polyester fibers, especially polyethylene terephthalate fibers, have excellent mechanical and thermal properties, so they are used not only for clothing, but also for tire cords, conveyor belts, etc.
- Widely used in industrial applications such as belts, seat belts, hoses, and sewing thread. In recent years, in particular, the specific gravity of industrial fibers, especially fibers for reinforcing rubber structures, has become increasingly higher than that for clothing, and as a result, the required properties of such fibers have become more stringent.
従来、ゴム構造物補強用繊維をはじめとする工業用繊維
の製造法は切断強度の改善を指向した方向であり、例え
ば特公昭４１−７８９２号公報に記載されている如く溶
融状態の高重合度ポリマーを口金から高速雰囲気中に吐
出してから徐冷し、低速下に引き取って得られる低配向
度の未延伸糸を多段延伸した後、高温度で熱処理する方
法、又かかる未延伸系を多段延伸するに当って、第１段
延伸時に過熱蒸気を高速で吹き付ける所謂スチームジェ
ット方式による方法等が知られている。Conventionally, manufacturing methods for industrial fibers, including fibers for reinforcing rubber structures, have been directed toward improving cutting strength. A method in which the undrawn yarn with a low degree of orientation obtained by discharging the polymer from a nozzle into an atmosphere at high speed, cooling it slowly, and then taking it back at a low speed is drawn in multiple stages, and then heat-treating it at high temperature, or a method in which such an undrawn system is A known method for stretching is a so-called steam jet method in which superheated steam is sprayed at high speed during the first stage of stretching.
かくして得られる繊維は当初の意図通り切断強度の面に
おいては優れているが、他方耐疲労性の面からは充分と
は言えず、例えばタイヤコード用途の中でも重量車両用
タイヤには使用できないといったことからも、未だ用途
が限定されているのが現状である。Although the fibers obtained in this way are excellent in terms of cutting strength as originally intended, they are not sufficient in terms of fatigue resistance, and for example, they cannot be used in heavy vehicle tires even among tire cord applications. However, the current situation is that its uses are still limited.
一方、このような耐疲労性を改善するために、種々検討
がなされており、その代表的な手段としては特開昭５３
−５３０３１号公報又は特開昭５３−５３０３２号公報
に記載されている如く、高重合度の溶融ポリマーを吐出
して急冷してから高速下に引き取って得られる高配向の
未延伸糸を、多段延伸・熱処理する方法が知られている
。かかる方法により得られる繊維は、熱寸法安定性や耐
疲労性の改善は達成されるものの、逆に強度は前記の低
配向糸を延伸する方法によって得られる繊維のそれより
も劣る欠点を有している。On the other hand, in order to improve such fatigue resistance, various studies have been made, and a representative method is the Japanese Patent Application Laid-open No. 53
As described in JP-A-53031 or JP-A-53-53032, highly oriented undrawn yarn obtained by discharging a molten polymer with a high degree of polymerization, quenching it, and taking it off at high speed is multi-staged. A method of stretching and heat treatment is known. Although the fibers obtained by this method have improved thermal dimensional stability and fatigue resistance, they have the disadvantage that their strength is inferior to that of the fibers obtained by the method of drawing low-oriented yarns. ing.
一方、これらの高配向の未延伸糸の延伸方法を改良し、
物性を向上させようという試みも特開昭５７−１６９１
５号公報あるいは特開昭５８−１８６６０７号公報に記
載されているが不十分なものである。On the other hand, we improved the drawing method for these highly oriented undrawn yarns,
Attempts to improve physical properties were also made in JP-A-57-1691.
Although it is described in Japanese Patent Application Laid-open No. 58-186607, it is insufficient.
また、上記従来方法によって得たポリエステル繊維は微
細構造的にみた場合、繊維平均の配向性が低く、更に詳
しくは非晶部分の配向が低く、繊維全体としてリラック
スした構造が特徴的であるがために該繊維をゴム構造物
補強用として加工した場合、ゴム中での水あるいはアミ
ン類による劣化が著しく所謂耐化学安定性が悪化する傾
向を示す。In addition, when looking at the microstructure of the polyester fibers obtained by the conventional method, the fiber average orientation is low, and more specifically, the orientation of the amorphous portion is low, and the fiber as a whole is characterized by a relaxed structure. When the fibers are processed to reinforce rubber structures, the so-called chemical stability tends to be significantly deteriorated by water or amines in the rubber.
さらに、耐化学安定性の改善を目的にポリエステル中の
カルボキシル末端基を残少させる方法も、その他の特性
改善、即ち強力、弾性率および寸法安定性、耐疲労性な
どの改善には何ら寄与するものではない。Furthermore, the method of reducing carboxyl end groups in polyester for the purpose of improving chemical stability does not contribute to improving other properties, such as strength, elastic modulus and dimensional stability, and fatigue resistance. It's not a thing.
（発明が解決しようとする課題）
■ 前記特公昭４１−７８９２号公報で知られる、高重
合度ポリマーから得られる低配向度の未延伸糸を多段延
伸する方法によれば得られる繊維の強度は優れるが耐疲
労性の面で充分ではないという問題を有する点、
■ 一方、特開昭５３−５３０３１号公報又は特開昭５
３−５３０３２号公報で知られる、高重合度の溶融ポリ
マーを吐出して急冷してから高速下に引き取って得られ
る高配向の未延伸糸を多段延伸して熱処理する方法によ
れば、得られる繊維の熱寸法安定性や耐疲労性は改善さ
れるものの強度の面で充分ではないという問題点を有す
る点、
■ また、従来品のポリエステル繊維は非晶部分の配向
が低く、繊維全体としてリラックスした構造であるため
に、ゴム構造物補強用として加工した場合ゴム中での水
あるいはアミン鎖による劣化が著しく化学安定性が悪い
という欠点を有する点、
本発明は前記■〜■で示す従来の欠点をすべて解消し、
高強力・高弾性率でかつ寸法安定性、耐疲労性、耐化学
安定性を同時に改善したゴム構造物補強用に適したポリ
エステル繊維を提供せんとするものである。(Problems to be Solved by the Invention) ■ According to the method of multi-stage drawing of undrawn yarn with a low degree of orientation obtained from a highly polymerized polymer, which is known from the above-mentioned Japanese Patent Publication No. 41-7892, the strength of the obtained fiber is Although it has excellent fatigue resistance, it has the problem that it is not sufficient in terms of fatigue resistance.
According to the method known in Japanese Patent No. 3-53032, in which a highly oriented undrawn yarn obtained by discharging a molten polymer with a high degree of polymerization, rapidly cooling it, and then drawing it under high speed is subjected to multi-stage stretching and heat treatment, it is possible to obtain Although the thermal dimensional stability and fatigue resistance of the fibers are improved, there is a problem that the strength is not sufficient. ■ Also, conventional polyester fibers have low orientation in the amorphous portion, making the fibers as a whole less relaxed. Because of its structure, when processed to reinforce rubber structures, it suffers from severe deterioration due to water or amine chains in the rubber, resulting in poor chemical stability. Eliminate all shortcomings,
It is an object of the present invention to provide a polyester fiber suitable for reinforcing rubber structures, which has high strength and high modulus, and has improved dimensional stability, fatigue resistance, and chemical stability at the same time.
（課題を解決するための手段）
即ち、本発明はエチレンテレフタレート系ポリエステル
よりなり、繊維の極限粘度ＩＶ（Ｐ−クロルフェノール
／テトラクロルエタン−３／ｌ混合溶媒中３０℃で測定
）が０．５５〜１．２０テ、且つ、下記（イ）〜（ト）
の特性を有することを特徴とする低収縮高弾性率ポリエ
ステル繊維である。(Means for Solving the Problems) That is, the present invention is made of ethylene terephthalate polyester, and the intrinsic viscosity IV of the fiber (measured at 30°C in a P-chlorophenol/tetrachloroethane-3/l mixed solvent) is 0. 55 to 1.20, and the following (a) to (g)
It is a low shrinkage, high modulus polyester fiber characterized by having the following characteristics.
（イ）複屈折率Δｎが１９５ Ｘ １０−’以上、（Ｉ
ｌ＋）切断強度が７〜１１ｇ／ｄ、（ハ）初期引張弾性
率が１５０ｇ／ｄ以上、（ニ）比重ＳＧが１．３９０以
下、
（ネ）１６０℃における乾熱収縮率５ＨＤｌ＆６が６．
０％以下、
（へ）繊維の側表面に多数の微細凹凸が存在する、（ト
）繊維の横断面を光学顕微鏡で観察すると中心部に黒点
が存在する、
本発明繊維を構成するポリエステルは、その反復単位の
８５モル％以上がエチレンテレフタレート単位よりなる
ものであって、特にテレフタル酸またはその機能的誘導
体とエチレングリコールとから製造されるポリエチレン
テレフタレートを主たる対象とする。しかしながら、ポ
リエチレンテレフタレートを構成する酸成分であるテレ
フタル酸またはその機能的誘導体の一部を１５モル％未
満の例えばイソフタル酸、アジピン酸、セバシン酸、ア
ゼライン酸、ナフタール酸、ｐ−オキシ安息香酸、２，
５−ジメチルテレフタル酸のような２官能性酸、または
それ等の機能的誘導体のうち少なくとも一種で置き換え
るか、もしくは、グリコール成分であるエチレングリコ
ールの一部を１５モル％未満の例えばジエチレングリコ
ール、１．４−ブタンジオール等の２価アルコールのう
ち少なくとも一種で置き換えた共重合体であってもよい
。また、これ等のポリエステル酸化防止剤、難燃剤、接
着性向上剤、艶消剤、着色剤等を含有させてもさしつか
えない。(a) Birefringence Δn is 195 x 10-' or more, (I
l+) Cutting strength is 7 to 11 g/d, (c) Initial tensile modulus is 150 g/d or more, (d) Specific gravity SG is 1.390 or less, (v) Dry heat shrinkage rate at 160°C is 6.
The polyester constituting the fiber of the present invention has: More than 85 mol% of the repeating units are composed of ethylene terephthalate units, and in particular polyethylene terephthalate produced from terephthalic acid or its functional derivative and ethylene glycol is the main target. However, less than 15 mol% of terephthalic acid or its functional derivative, which is an acid component constituting polyethylene terephthalate, is contained in an amount of less than 15 mol%, such as isophthalic acid, adipic acid, sebacic acid, azelaic acid, naphthalic acid, p-oxybenzoic acid, 2 ，
Replacement with at least one difunctional acid such as 5-dimethylterephthalic acid, or a functional derivative thereof, or a portion of the glycol component ethylene glycol with less than 15 mol % of eg diethylene glycol, 1. A copolymer substituted with at least one type of dihydric alcohol such as 4-butanediol may also be used. Further, these polyester antioxidants, flame retardants, adhesion improvers, matting agents, coloring agents, etc. may be included.
本発明のポリエステル繊維の特徴を添付の写真によって
説明する。The characteristics of the polyester fiber of the present invention will be explained with reference to the attached photographs.
第１図Ａは、本発明のポリエステル繊維の横断面写真で
あり、第１図Ｂは比較例のポリエステル繊維の横断面写
真である。第１図Ｂに見られる如く通常のタイヤコード
用途に用いられている様な比較例の繊維の断面には、何
の特徴も認められず輪郭が見えるだけであるが、第１図
Ａに見られる如（本発明の繊維は中心部が黒化して見え
、繊維断面内の内外層間で大きな密度差が存在している
ことを示している。特に中心部が黒化していることから
、−概にはいえないが、後に述べる諸データを総合して
考えると断面中心部の密度が外層に比べて著しく低くな
っているものと判断される。FIG. 1A is a cross-sectional photograph of a polyester fiber of the present invention, and FIG. 1B is a cross-sectional photograph of a polyester fiber of a comparative example. As seen in Figure 1B, the cross section of the fiber of the comparative example, which is used for ordinary tire cord applications, shows no features and only outlines, but as seen in Figure 1A, (The fiber of the present invention appears to have a blackened center, indicating that there is a large density difference between the inner and outer layers within the fiber cross section. Especially since the center is blackened, - However, when considering the various data described later, it can be concluded that the density in the center of the cross section is significantly lower than that in the outer layer.
このことは、タイヤコード等のゴム補強用途に本発明の
繊維が用いられるときの耐疲労性能向上効果、高弾性率
化という有用な性能向上効果をもたらすものである。This brings about useful performance improvement effects such as fatigue resistance performance improvement effect and high elastic modulus when the fiber of the present invention is used for rubber reinforcement applications such as tire cords.
第２図Ａは、本発明のポリエステル繊維の側面を示す倍
率５０００倍の拡大写真であり、第２図Ｂは比較例のポ
リエステル繊維の側面を示す倍率５０００倍の拡大写真
である。走査型電子顕＠鏡（Ｓ［！？Ｉ）で５０００倍
に拡大して観察すると、第２図Ａに見られる如く本発明
の繊維は無数の凹凸が存在しており、特に樅条溝が認め
られる。一方、第２図Ｂに見られる如〈従来のタイヤコ
ード用途に用いられているポリエステル繊維の側面には
、はとんど凹凸が認められない。本発明の繊維は、表面
に無数の凹凸を有することにより表面積が著しく増大し
、タイヤコード等に用いられる際のデイツプ液処理時の
デイツプ液の付着効率向上、ゴムとの接着性能向上効果
をもたらすものである。FIG. 2A is an enlarged photograph at a magnification of 5,000 times showing the side surface of the polyester fiber of the present invention, and FIG. 2 B is an enlarged photograph at a magnification of 5,000 times showing the side surface of the polyester fiber of the comparative example. When observed with a scanning electron microscope (S [!? Is recognized. On the other hand, as shown in FIG. 2B, irregularities are rarely observed on the side surfaces of polyester fibers used in conventional tire cord applications. The fibers of the present invention have numerous irregularities on the surface, which significantly increases the surface area, which improves the adhesion efficiency of dip liquid during dip liquid treatment when used in tire cords, etc., and improves adhesion performance with rubber. It is something.
第３図Ａは、本発明のポリエステル繊維のＸＩ小角散乱
（ＳＡＸＳ）写真であり、第３図Ｂは比較例のポリエス
テル繊維のＸ線小角散乱写真である。FIG. 3A is an XI small-angle scattering (SAXS) photograph of the polyester fiber of the present invention, and FIG. 3B is an X-ray small-angle scattering photograph of the polyester fiber of the comparative example.
本発明の繊維の場合、中心部に大きな楕円状の散乱像が
認められるに対し、従来のタイヤコード用途に用いられ
る様な比較例のポリエステル繊維の中心部には、通常の
全反射にもとづくストリーク状散乱が認められるだけで
ある。このことば、本発明のポリエステル繊維の微細組
織が従来のポリエステル繊維と全く異なり、均一なボイ
ド状の構造単位が存在していることを示すものである。In the case of the fiber of the present invention, a large elliptical scattering image is observed in the center, whereas in the center of the polyester fiber of the comparative example, which is used for conventional tire cord applications, a streak due to normal total reflection is observed in the center. Only some scattering is observed. These words indicate that the microstructure of the polyester fiber of the present invention is completely different from that of conventional polyester fibers, and that uniform void-like structural units are present.
このことは、第１図Ａに見られた風維断面中心部の黒化
した部分の構造と対応するものと考えられ、このことが
、耐疲労性向上効果を生み出す原動力となっているもの
と考えられる。This is thought to correspond to the structure of the blackened part at the center of the wind fiber cross section seen in Figure 1A, and this is thought to be the driving force behind the effect of improving fatigue resistance. Conceivable.
このような第１図から第３図に示す繊維のモルフォロジ
ー的な特徴がタイヤコード等のゴム補強用途に従来のポ
リエステルに比べて優れた後加工性能を有するだけでな
く、更に下記に示す特性を満足することから、従来のポ
リエステル繊維が有している基本性能を損なうことなく
、更に低収縮で寸法安定性に優れ、かつ高弾性率化され
タイヤに用いられる際、乗りごこち、操縦安定性の向上
をもたらすのである。The morphological characteristics of the fibers shown in Figures 1 to 3 not only have superior post-processing performance compared to conventional polyester for rubber reinforcement applications such as tire cords, but they also have the following properties: Because of this, it has low shrinkage, excellent dimensional stability, and high elastic modulus without sacrificing the basic performance of conventional polyester fibers, and when used in tires, it improves riding comfort and handling stability. It brings improvement.
本発明の繊維の極限粘度ＩＶは、０．５５〜１．２０の
範囲にある。ＩＶが０．５５未満であると強度が低下す
るだけでなく、ゴム補強用に用いる際、高温での物性低
下が大きく、実用的でない。The intrinsic viscosity IV of the fibers of the present invention is in the range of 0.55 to 1.20. If the IV is less than 0.55, not only will the strength decrease, but when used for rubber reinforcement, the physical properties will deteriorate significantly at high temperatures, making it impractical.
ＩＶが１．２０よりも大きいと寸法安定性能が低下して
くる。When IV is larger than 1.20, dimensional stability performance decreases.
本発明の繊維の複屈折率Δｎは１９５ Ｘ １０− ’
以上のものである。複屈折率Δｎが１９５ Ｘ １０−
’未満であると十分な強度と弾性率を満足させることが
できない６本発明の繊維の八〇としては、２００ Ｘ
１０−’以上であると更に好ましい。本発明の繊維の場
合、Δｎは高ければ高い程性能的に優れているが、２３
゜Ｘｌ０−’のΔｎが現状の到達上限値である。The birefringence Δn of the fiber of the present invention is 195 x 10-'
That's all. Birefringence Δn is 195 x 10-
If the fiber of the present invention is less than 200X, sufficient strength and elastic modulus cannot be satisfied.
More preferably, it is 10-' or more. In the case of the fiber of the present invention, the higher the Δn, the better the performance, but 23
Δn of °Xl0-' is the current upper limit value.
本発明の繊維の切断強度ＤＴは７〜１１ｇ／ｄである。The cutting strength DT of the fiber of the present invention is 7 to 11 g/d.
７ ｇ／ｄ未満であると、従来用いられるタイヤコード
用途に用いられるポリエステル繊維よりも強度が低くな
るため好ましくない。一方、強度の上限は高ければ高い
程望ましいが、１１ｇ／ｄ以上のものを製造するに当っ
ては、高強度化のために特殊な製造条件、製造装置が必
要となり、製造上の困難性の面と、１１ｇ／ｄであれば
タイヤコードとしての要求性能に必要かつ充分であるの
で１１ｇ／ｄを上限とすることが好ましい。If it is less than 7 g/d, the strength will be lower than that of polyester fibers conventionally used for tire cord applications, which is not preferable. On the other hand, the higher the upper limit of strength is, the more desirable it is, but when manufacturing something over 11 g/d, special manufacturing conditions and manufacturing equipment are required to achieve high strength, which can lead to manufacturing difficulties. Since 11 g/d is both necessary and sufficient for the required performance as a tire cord, it is preferable to set the upper limit to 11 g/d.
本発明の繊維の初期引張弾性率は１５０ｇ／ｄ以上であ
る。１５０ｇ／ｄ未満であると、タイヤとして従来のタ
イヤコード用ポリエステル繊維を用いた場合と、乗りご
こち、操縦安定性において、顕著な差が認められなくな
る。The initial tensile modulus of the fiber of the present invention is 150 g/d or more. If it is less than 150 g/d, there will be no noticeable difference in riding comfort and handling stability compared to when conventional polyester fibers for tire cords are used as tires.
タイヤ用途に用いる際、初期引張弾性率が高い程性能的
に優れているが、３００ｇ／ｄを越える初期弾性率を達
成すると、耐疲労性能の低下をもたらすので好ましくな
い。When used in tire applications, the higher the initial tensile modulus, the better the performance, but achieving an initial modulus of more than 300 g/d is not preferable because it results in a decrease in fatigue resistance.
本発明の繊維の比重は、１．３９０以下であり、比重が
１．３９０を越えると強度の低下をもたらすためよくな
い。The specific gravity of the fiber of the present invention is 1.390 or less, and if the specific gravity exceeds 1.390, it is not good because it causes a decrease in strength.
本発明の繊維の１６０℃における乾熱収縮率５１１０１
６゜は６．０％以下であり、従来のタイヤコード用ポリ
エステル繊維に比べ低収縮化しており、寸法安定性に優
れている。Dry heat shrinkage rate of the fiber of the present invention at 160°C: 51101
6° is 6.0% or less, which means it has less shrinkage than conventional polyester fibers for tire cords and has excellent dimensional stability.
５１１０１６゜が６．０％を越えると、寸法安定性向上
効果が顕著でなくなるので好ましくない。If 511016° exceeds 6.0%, the effect of improving dimensional stability will not be significant, which is not preferable.
以上に詳述したように本発明の繊維は、低収縮でかつ、
高弾性率高強力というタイヤコード用繊維として最も適
した特性を有するものであり、物性的にも従来のポリエ
ステル繊維では実現されなかったものである。As detailed above, the fiber of the present invention has low shrinkage and
It has the most suitable properties as a fiber for tire cords, such as high elastic modulus and high strength, and has physical properties that have not been achieved with conventional polyester fibers.
（作用）
本発明はエチレンテレフタレート系ポリエステルの繊維
の物性を損なうことなく、低収縮化高弾性率化すると共
に、表面及び内部形態を変化せしめて、タイヤコード等
のゴム補強用に用いられるときの接着性、耐疲労性を改
善したものである。(Function) The present invention reduces the shrinkage and increases the elastic modulus of ethylene terephthalate polyester fibers without impairing their physical properties, and also changes the surface and internal morphology, making them suitable for use in rubber reinforcement for tire cords, etc. It has improved adhesion and fatigue resistance.
特に疲労時の発熱抑制効果が上記、作用に大きく寄与し
ていると考えられる。In particular, the effect of suppressing heat generation during fatigue is thought to greatly contribute to the above-mentioned effects.
（実施例）
以下本発明を具体例によって説明する。なお、本発明の
評価に用いた特性の定義ならびに測定方法を以下に示す
。(Example) The present invention will be explained below using specific examples. The definitions and measurement methods of the characteristics used in the evaluation of the present invention are shown below.
〈極限粘度■の測定法〉
本発明において、エチレンテレフタレート系ポリエステ
ルの極限粘度■は、Ｐ−クロルフェノール／テトラクロ
ルエタン−３／ｌ混合溶媒を用い、３０℃で測定した極
限粘度〔η〕を次式によりフェノール／テトラクロルエ
タン＝６０／４０の極限粘度■に換算したものである。<Method for measuring intrinsic viscosity (■)> In the present invention, the intrinsic viscosity (■) of ethylene terephthalate polyester is determined by the intrinsic viscosity [η] measured at 30°C using a P-chlorophenol/tetrachloroethane-3/l mixed solvent. It is converted into an intrinsic viscosity (■) of phenol/tetrachloroethane=60/40 using the following formula.
ＩＶ ＝ ０．８３２５ Ｘ （η） ＋Ｏ，ｏｏｓ〈
繊維の繊度の測定法〉
標準状Ｂ（温度２０±２℃２相対湿度６５±２％の状態
）の試験室で、サーチ■製のオートバイブロ式繊度測定
器ＤＥＮＩＥＲＣＯＭＰＵＴＥＲＤＣ−１１Ｂ型を使用
して、単繊維の繊度（デニール、ｄ）を測定した。IV = 0.8325 X (η) +O,oos〈
Measuring method of fiber fineness〉 In a test room under standard condition B (temperature 20 ± 2°C, relative humidity 65 ± 2%), using an autobibro type fineness measuring instrument DENIER COMPUTER DC-11B manufactured by Saatchi ■, The fineness (denier, d) of the single fibers was measured.
但し繊維の測定試料長は、５０Ｉｎ１１とした。However, the fiber measurement sample length was 50In11.
く繊維およびコードの強伸度特性の測定法〉ＪＩＳ −
Ｌ１０１７の定義による。試料をカセ状にとり、２０℃
１６５％Ｒ１１の１４ｉ湿度調節された部屋で２４時間
放置後、“テンシロン”ＵＴＭ−れ型引張試験機〔東洋
ボールドウィン■製〕を 用い、長２０ｃ＋ｇ、引張速
度２０ｃｍ／分で測定した。Measuring method of strength and elongation properties of fibers and cords〉JIS-
According to the definition of L1017. Take the sample in a skein and heat it at 20°C.
After being left in a 14i humidity-controlled room of 165% R11 for 24 hours, it was measured using a "Tensilon" UTM-type tensile tester (manufactured by Toyo Baldwin) at a length of 20 c+g and a tensile speed of 20 cm/min.
〈複屈折率（△ｎ）の測定法〉
ニコン偏光顕微鏡Ｐ０１１型ライッ社ベレンクコンペン
セーターを用い、光源としてはスペクトル光源用起動装
置（東芝５ＬＳ−３−Ｂ型）を用いた（Ｎａ光源）。５
〜６ｍ長の繊維軸に対し４５″の角度に切断した試料を
、切断面を上にして、スライドグラス上に載せる。試料
スライドグラスを回転載物台にのせ、試料が偏光子に対
して４５°になる様、回転載物台を回転させて調節し、
アナライザーを挿入し暗視界とした後、コンペンセータ
ーを３０にして縞数を数える（ｎ個）、コンペンセータ
ーを右ネジ方向にまわして試料が最初に暗くなる点のコ
ンペンセーターの目盛ａ１コンペンセーターを左ネジ方
向にまわして試料が最初に一番暗くなる点のコンペンセ
ーターの目盛すを測定した後（いずれも１／１０目盛ま
で読む）、コンペンセーターを３０にもどしてアナラザ
ーをはずし、試料の直径ｄを測定し、下記の式にもとづ
き複屈折率（八〇）を算出する（測定数２０個の平均値
）。<Measurement method of birefringence (△n)> A Nikon polarizing microscope P011 type Reich Berenck compensator was used, and a spectral light source activation device (Toshiba 5LS-3-B type) was used as the light source (Na light source). . 5
A sample cut at an angle of 45" to the fiber axis with a length of ~6 m is placed on a glass slide with the cut side facing up. Place the sample slide glass on a rotating stage, and the sample is cut at an angle of 45" to the polarizer. Rotate and adjust the rotating stage so that
After inserting the analyzer and making it a dark field, set the compensator to 30 and count the number of stripes (n).Turn the compensator clockwise and set the compensator scale A1 to the point where the sample first becomes dark. After turning the compensator counterclockwise and measuring the scale of the compensator at the point where the sample first becomes darkest (read up to 1/10 scale), return the compensator to 30, remove the analyzer, and measure the diameter of the sample. d is measured, and the birefringence index (80) is calculated based on the following formula (average value of 20 measurements).
△ｎ＝ｒ”／ｄ（「；レターデーション、−ｎλ０＋ε
）
λｏ −５８９，３ｍμ
６８５４７社のコンペンセーターの説明書のＣ／１００
００とｉより求める
１＝（ａ−ｂ）（：コンペンセーターの読みの差）
く乾熱収縮率の測定法〉
ＪＩＳ−Ｌ −１０１７（１９８７）の５・７に準して
測定を行った。△n=r"/d("; retardation, -nλ0+ε
) λo -589,3mμ C/100 of compensator manual of 68547 company
1 determined from 00 and i = (a-b) (: difference in compensator reading) Measuring method of dry heat shrinkage rate> Measurement was performed according to 5.7 of JIS-L-1017 (1987). .
〈比重の測定法〉
ｎ−へブタンと四塩化炭素よりなる密度勾配管を作成し
、３０’Ｃ＋０．１ ’Ｃに調温された密度勾配管中に
十分に脱泡した試料を入れ、５時間放置後の密度勾配管
中の試料位置を、密度勾配管の目盛りで読みとった値を
、標準ガラスフロートによる密度勾配管目盛〜比重キャ
リブレーショングラフから比重値に換算し、ｎ＝４で測
定。比重値は原則として小数点以下４桁まで読む。<Method for measuring specific gravity> Create a density gradient tube made of n-hebutane and carbon tetrachloride, place a sufficiently degassed sample into the density gradient tube whose temperature is adjusted to 30'C + 0.1'C, and The sample position in the density gradient tube after standing for a period of time was read on the scale of the density gradient tube, and the value was converted into a specific gravity value from the density gradient tube scale to specific gravity calibration graph using a standard glass float, and measured at n=4. As a general rule, read specific gravity values to four decimal places.
〈繊維の断面観察法〉
試料を樹脂に包埋しミクロトームにより数十ミクロンの
厚みにカットした後、光学顕微鏡を用い２００〜６００
倍の倍率下に観察するか、あるいは、黒色のタフセル綿
を充填した貫通孔中に試料を差し込み、カミソリ刃でカ
ットしたものを光学顕微鏡を用い２００〜６００倍の倍
率下に観察する。<Fiber cross-sectional observation method> After embedding the sample in resin and cutting it to a thickness of several tens of microns using a microtome, use an optical microscope to
Observe under a magnification of 2x, or insert a sample into a through hole filled with black Toughcell cotton, cut with a razor blade, and observe under a magnification of 200 to 600x using an optical microscope.
〈走査型電子顕微鏡（Ｓｌ！Ｍ）による観察法〉試料を
試料台上に固定し、ＥＩＫＯ製ＩＢ−５型イオンコータ
ーで白金又は金蒸着した後、日立製５５１０型ＳＥＭを
用いて観察し、５０００倍の倍率で写真をとる。<Observation method using a scanning electron microscope (Sl!M)> The sample was fixed on a sample stage, platinum or gold was deposited using an EIKO model IB-5 ion coater, and then observed using a Hitachi model 5510 SEM. Take a photo at 5000x magnification.
〈小角Ｘ線回折による回折像及び繊維長周期の測定法〉
小角Ｘ線敗乱パターンの測定は、例えば理学電機社製Ｘ
線発生装置１ （ＲＵ−３）！型）を用いて行なう。<Measurement method of diffraction image and fiber long period by small-angle X-ray diffraction> Measurement of small-angle X-ray destruction pattern can be carried out using, for example,
Ray generator 1 (RU-3)! This is done using a mold.
測定には管電圧４５ＫＶ、管電流７０ｍＡ、ニッケルフ
ィルターで単色化したＣｕＫα（λｘ＝１．５４１８人
）を使用する。サンプルホルダーに繊維試料を単糸どう
しが互いに平行になるように取り付ける。試料の厚さは
０．５〜１．０ｍ位になるようにするのが適当である。For the measurement, a tube voltage of 45 KV, a tube current of 70 mA, and a monochromatic CuKα (λx=1.5418 persons) with a nickel filter are used. Attach the fiber sample to the sample holder so that the single threads are parallel to each other. It is appropriate that the thickness of the sample is approximately 0.5 to 1.0 m.
この平行に配列した繊維の繊維軸に垂直にＸ線を入射さ
せフィルム（乾板）を試料から距離ｉの位置に設置し、
回折像の撮影を行う。X-rays are incident perpendicularly to the fiber axes of the fibers arranged in parallel, and a film (dry plate) is placed at a distance i from the sample.
Photograph the diffraction image.
繊維長周期は、回折像において、赤道線を対称軸とする
上下の散乱光の最大幅を２ａ、ｔａｎ２ｄ ＝ □
！
としたとき、長周期＝λ）（／２ｓｉｎｄで著す表わさ
れる。The fiber length period is 2a, tan2d = □!, which is the maximum width of the upper and lower scattered light with the equator line as the axis of symmetry in the diffraction image. When, long period = λ) (/2sind) is expressed.
〔実施例１〕
極限粘度１．０のポリエチレンテレフタレートを紡糸温
度３００℃にて紡糸口金孔径０．２［１１１１、口金孔
数１２０孔を有する紡糸口金より単孔吐出量０．２ｇ／
分で押出し、２０ ’Ｃ，０，３ｍ ／ ｓｅｃのクエ
ンチエヤーで冷却固化させた後、約１％の油剤（有効成
分）を付与し、紡速２５０ｍ／分で巻き取った。該未延
伸糸のΔｎは０．００４であった。該未延伸糸を１００
％のアセトン浴に５００秒間浸漬した後、引き続いてフ
ィード速度１５．０ｍ／分で８０″Ｃの非接触ヒーター
で３．６５倍延伸した後、１６０℃の非接触ヒーターで
１．８１倍延伸し、更に２４５℃の非接触ヒーターで１
．１４倍の延伸を行った。[Example 1] Polyethylene terephthalate with an intrinsic viscosity of 1.0 was spun at a temperature of 300°C, with a spinneret diameter of 0.2 [1111] and a single-hole discharge rate of 0.2 g/drill from a spinneret having 120 holes.
After cooling and solidifying with a quencher at 20'C and 0.3 m/sec, approximately 1% oil agent (active ingredient) was added and the product was wound up at a spinning speed of 250 m/min. The undrawn yarn had a Δn of 0.004. The undrawn yarn is 100
% acetone bath for 500 seconds, followed by stretching 3.65 times with a non-contact heater at 80"C at a feed rate of 15.0 m/min, and then stretching 1.81 times with a non-contact heater at 160 °C. , further 1 with a non-contact heater at 245℃
．． It was stretched 14 times.
該延伸糸の断面写真を第１図（Ａ）に、側面写真を第２
図（Ａ）に、小角Ｘ線回折写真を第３図（Ａ）に示す、
該延伸糸の糸物性は切断強度８．１４ｇ／ｄ、切断伸度
５．１％、初期引張弾性率１９６．３ｇ／ｄ、比重１．
３８３７、乾熱収縮率４．７％、複屈折率２０１．９
ｘｌｏ−３、長周期１５１．７人であった。A cross-sectional photograph of the drawn yarn is shown in Figure 1 (A), and a side view photograph is shown in Figure 2.
Figure (A) shows a small-angle X-ray diffraction photograph in Figure 3 (A).
The physical properties of the drawn yarn are: strength at break 8.14 g/d, elongation at break 5.1%, initial tensile modulus 196.3 g/d, specific gravity 1.
3837, dry heat shrinkage rate 4.7%, birefringence index 201.9
xlo-3, long cycle was 151.7 people.
〔比較例１］
実施例１と全く同様の紡糸条件で未延伸糸を作成し、該
未延伸糸をアセトン浴で処理することな（、フィード速
度１５．０ｍ ７分で８０’Ｃの非接触ヒーターで３．
２９倍延伸した後、１６０’Ｃの非接触ヒーターで１．
６８倍延伸し、更に２４５℃の非接触ヒーターで１．０
９倍の延伸を行った。[Comparative Example 1] An undrawn yarn was created under exactly the same spinning conditions as in Example 1, and the undrawn yarn was not treated with an acetone bath (contactless spinning at 80'C for 7 minutes at a feed rate of 15.0 m). 3. With a heater.
After stretching 29 times, 1.
Stretched 68 times and further stretched to 1.0 with a non-contact heater at 245°C.
It was stretched 9 times.
該延伸糸の断面写真を第１図（Ｂ）に、側面写真を第２
図（Ｂ）に、小角Ｘ線回折写真を第３図（Ｂ）に示す。A cross-sectional photograph of the drawn yarn is shown in Figure 1 (B), and a side view photograph is shown in Figure 2.
FIG. 3(B) shows a small-angle X-ray diffraction photograph.
該延伸糸の糸物性は切断強度１１．７４ｇ／ｄ、切断伸
度７．３％、初期引張弾性率１８４．８ｇ／ｄ、比重１
．４０００、乾熱収縮率７，９％、複屈折率１９９．３
Ｘ １０−”、長周期１９０．０人であった。The physical properties of the drawn yarn are: strength at break 11.74 g/d, elongation at break 7.3%, initial tensile modulus 184.8 g/d, specific gravity 1.
．． 4000, dry heat shrinkage rate 7.9%, birefringence index 199.3
X 10-'', long period 190.0 people.
〔実施例２及び比較例２〕
実施例１及び比較例１で得られた延伸糸をそれぞれ合糸
して約１０００デニールとした後、３９丁／１０ｃ＋ｅ
の上撚及び下撚を施して双糸コードとし、該双糸コード
に通常のポリエステル用ＲＦＬ処理液にてＤｉｐ処理を
施し、これらのゴムとの接着力、チューブ疲労性能を比
較評価した。その結果を第１表に示す。[Example 2 and Comparative Example 2] After doubling the drawn yarns obtained in Example 1 and Comparative Example 1 to approximately 1000 denier, 39 yarns/10c+e
A double-thread cord was obtained by first twisting and first twisting, and the double-thread cord was subjected to a Dip treatment using a normal RFL treatment liquid for polyester, and the adhesion strength with these rubbers and tube fatigue performance were comparatively evaluated. The results are shown in Table 1.
〈 第１表 〉 尚、デイツプコードの評価法を下記に示す。< Table 1〉 The method for evaluating dip cords is shown below.
く中間伸度〉
延伸糸の場合は４．５ｇ／ｄ応力時の伸度で、また処理
コードの場合は４．５ｋｇ応力時の伸度で示した。Intermediate elongation> In the case of drawn yarn, the elongation is expressed as the elongation at a stress of 4.5 g/d, and in the case of the treated cord, the elongation is expressed as the elongation at a stress of 4.5 kg.
くチューブ寿命〉
ＪＩＳＬ１０１７−１９７８ （１３ＺＩＡ法）に準拠
し、チューブ破断までの時間を示した。Tube life> The time until tube breakage is shown in accordance with JISL1017-1978 (13ZIA method).
〈接着力〉
試料を下記ゴム配合物と共に１７０’ＣＸ６０分の加硫
接着してＨ接着力を測定した。<Adhesive Strength> A sample was vulcanized and bonded with the following rubber compound for 170'CX60 minutes, and the H adhesive strength was measured.
スモークドシート患３ ７部部ＳＢＲ−
１７１２４２部
Ｚｎ０ ５部Ｓ
２．５部ステアリン酸
２６５部Ｎ−シクロへキシル−２
−
ベンゾチアゾール スルフェンアミド １部パインター
ル ５部Ｎ−フェニル−Ｎ′
−イソプロピル
−Ｐ−フ エコレンジアミン １．５部ＦＥＦカ
ーボンブラック ５部（発明の効果）
本発明によればポリエチレンテレフタレートの物性をｔ
員うことなしに高強度、高弾性率を有し、かつ寸法安定
性、接着性に優れたポリエステル繊維が提供でき、ラジ
アルタイヤのカーカスコードに適し、ゴム製品とした時
のゴムとの接着性、耐疲労性が優れ且つ、タイヤ等にし
た場合の発熱抑制効果、低騒音効果、操縦安定性効果の
優れたものが提供できる。Smoked seat patient 3 7th part SBR-
171242 parts Zn0 5 parts S
2.5 parts stearic acid
265 parts N-cyclohexyl-2
- Benzothiazole Sulfenamide 1 part Pine tar 5 parts N-phenyl-N'
-Isopropyl-P-phecolene diamine 1.5 parts FEF carbon black 5 parts (effects of the invention) According to the present invention, the physical properties of polyethylene terephthalate are improved by t.
We can provide polyester fibers that have high strength, high modulus of elasticity, and excellent dimensional stability and adhesive properties without using any material.They are suitable for carcass cords of radial tires, and have excellent adhesion to rubber when made into rubber products. , it is possible to provide tires with excellent fatigue resistance and excellent heat generation suppressing effects, low noise effects, and steering stability effects when used in tires and the like.
第１図Ａは、本発明繊維の横断面を示
す５１７倍での顕微鏡写真であり、第１図Ｂは比較例１
で得られた延伸繊維の横断面を示す２６３倍での顕微鏡
写真である。
第２図Ａは、本発明繊維の側表面を示す５０００倍での
走査型電子顕微鏡写真であり、第２図Ｂは比較例１で得
られた延伸繊維の側表面を示す５０００倍での走査型電
子顕微鏡写真である。
第３図Ａは、本発明繊維のＸ線小角散乱写真であり第３
図Ｂは比較例１で得られた延伸繊維のＸ線小角散乱写真
である。
特許出願人 東洋紡績株式会社
羊 、ｌ 図
第２ 図FIG. 1A is a micrograph showing the cross section of the fiber of the present invention at a magnification of 517 times, and FIG. 1B is a photomicrograph of Comparative Example 1.
This is a micrograph at a magnification of 263 times showing a cross section of the drawn fiber obtained in . FIG. 2A is a scanning electron micrograph showing the side surface of the fiber of the present invention at a magnification of 5000 times, and FIG. 2B is a scanning electron micrograph taken at a magnification of 5000 times showing the side surface of the drawn fiber obtained in Comparative Example 1. This is an electron micrograph. Figure 3A is a small-angle X-ray scattering photograph of the fiber of the present invention;
Figure B is a small-angle X-ray scattering photograph of the drawn fiber obtained in Comparative Example 1. Patent applicant Toyobo Co., Ltd. Hitsuji, l Figure 2
Claims (1)
、繊維の極限粘度ＩＶ（Ｐ−クロルフェノール／テトラ
クロルエタン＝３／１混合溶媒中３０℃で測定）が０．
５５〜１．２０で、且つ、下記（イ）〜（ト）の特性を
有することを特徴とする低収縮高弾性率ポリエステル繊
維。 （イ）複屈折率Δｎが１９５×１０＾−＾３以上、 （ロ）切断強度が７〜１１ｇ／ｄ、 （ハ）初期引張弾性率が１５０ｇ／ｄ以上、 （ニ）比重ＳＧが１．３９０以下、 （ホ）１６０℃における乾熱収縮率ＳＨＤ＿１＿６＿０
が６．０％以下、 （ヘ）繊維の側表面に多数の微細凹凸が存在する、［尚
、微細凸凹の確認は走査型電子顕微鏡で５０００倍の倍
率での写真を観察する。］ （ト）繊維の横断面を光学顕微鏡で観察すると中心部に
黒点が存在する、(1) Made of ethylene terephthalate polyester, the fiber has an intrinsic viscosity IV (measured at 30°C in a P-chlorophenol/tetrachloroethane=3/1 mixed solvent) of 0.
55 to 1.20 and having the following properties (a) to (g). (a) Birefringence Δn is 195×10^-^3 or more, (b) Cutting strength is 7 to 11 g/d, (c) Initial tensile modulus is 150 g/d or more, (d) Specific gravity SG is 1. 390 or less, (e) Dry heat shrinkage rate at 160°C SHD_1_6_0
6.0% or less; (f) A large number of fine irregularities are present on the side surface of the fiber. [The fine irregularities can be confirmed by observing a photograph at 5000x magnification with a scanning electron microscope. ] (g) When the cross section of the fiber is observed with an optical microscope, there is a black spot in the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63050888A JP2551091B2 (en) | 1988-03-03 | 1988-03-03 | Low shrinkage high modulus polyester fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63050888A JP2551091B2 (en) | 1988-03-03 | 1988-03-03 | Low shrinkage high modulus polyester fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01229807A true JPH01229807A (en) | 1989-09-13 |
| JP2551091B2 JP2551091B2 (en) | 1996-11-06 |
Family
ID=12871276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63050888A Expired - Lifetime JP2551091B2 (en) | 1988-03-03 | 1988-03-03 | Low shrinkage high modulus polyester fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2551091B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0456495A2 (en) * | 1990-05-11 | 1991-11-13 | Hoechst Celanese Corporation | A drawn polyester yarn having a high tenacity, a high initial modulus and a low shrinkage |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS588119A (en) * | 1981-07-03 | 1983-01-18 | Asahi Chem Ind Co Ltd | Polyester fiber suitable for reinforcing rubber |
| JPS6094619A (en) * | 1983-10-21 | 1985-05-27 | Toyobo Co Ltd | Polyester fiber |
-
1988
- 1988-03-03 JP JP63050888A patent/JP2551091B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS588119A (en) * | 1981-07-03 | 1983-01-18 | Asahi Chem Ind Co Ltd | Polyester fiber suitable for reinforcing rubber |
| JPS6094619A (en) * | 1983-10-21 | 1985-05-27 | Toyobo Co Ltd | Polyester fiber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0456495A2 (en) * | 1990-05-11 | 1991-11-13 | Hoechst Celanese Corporation | A drawn polyester yarn having a high tenacity, a high initial modulus and a low shrinkage |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2551091B2 (en) | 1996-11-06 |
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