JP2008214792A - Reinforcing fiber for belt and belt - Google Patents
Reinforcing fiber for belt and belt Download PDFInfo
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- JP2008214792A JP2008214792A JP2007051444A JP2007051444A JP2008214792A JP 2008214792 A JP2008214792 A JP 2008214792A JP 2007051444 A JP2007051444 A JP 2007051444A JP 2007051444 A JP2007051444 A JP 2007051444A JP 2008214792 A JP2008214792 A JP 2008214792A
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- 239000012783 reinforcing fiber Substances 0.000 title claims abstract description 28
- 239000000835 fiber Substances 0.000 claims abstract description 23
- 230000002787 reinforcement Effects 0.000 claims abstract description 6
- 229920001971 elastomer Polymers 0.000 abstract description 23
- 239000005060 rubber Substances 0.000 abstract description 23
- 239000011159 matrix material Substances 0.000 abstract description 17
- 229920005989 resin Polymers 0.000 abstract description 13
- 239000011347 resin Substances 0.000 abstract description 13
- -1 polyethylene Polymers 0.000 description 12
- 230000003014 reinforcing effect Effects 0.000 description 12
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- 239000004744 fabric Substances 0.000 description 9
- 230000035882 stress Effects 0.000 description 8
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- 239000012948 isocyanate Substances 0.000 description 6
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- 229920000728 polyester Polymers 0.000 description 5
- 239000002759 woven fabric Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000011112 polyethylene naphthalate Substances 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- ISPYQTSUDJAMAB-UHFFFAOYSA-N 2-chlorophenol Chemical compound OC1=CC=CC=C1Cl ISPYQTSUDJAMAB-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
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- Artificial Filaments (AREA)
Abstract
Description
本発明は、ゴム及び樹脂などをマトリックスとしたベルト用補強繊維に関するものである。また、該ベルト用補強繊維によって補強されたベルトに関するものである。 The present invention relates to a reinforcing fiber for a belt using a matrix of rubber and resin. The present invention also relates to a belt reinforced with the belt reinforcing fiber.
ベルトは一般的に、ゴム及び樹脂層内部に、強度を確保するために補強層が埋設されて構成されている。この補強層としては、ベルトの用途に応じ、綿、麻といった天然繊維、ポリアミド、ポリエステル、ポリエチレン、ポリウレタン、ポリスチレン、ポリフロルエチレン、ポリアクリル、ポリビニルアルコール、全芳香族ポリエステル、そしてアラミドといった有機合成繊維の撚糸からなる織物やコードが利用されている。これらの織物やコードは、張力を要求される用途においては、一般的に織物の経方向、あるいはコード軸方向に緊張させると同時に高温熱処理を施し、所望の物性を得た後、マトリックスゴムあるいはマトリックス樹脂とを接着せしめる接着剤を織物あるいはコードに付着させ、その上にマトリックスゴムやマトリックス樹脂を付与しベルトを製造する。これら織物やコードとマトリックスとなるゴムや樹脂とを接着せしめることは容易ではなく、接着に関しては種々の検討がなされている（例えば、特許文献１、２など）。しかしながら、ベルトが使用される環境に応じてマトリックスとなるゴムや樹脂の種類が異なるため、それらに適した接着剤を用いなければならないといった問題がある。 In general, a belt is configured such that a reinforcing layer is embedded in a rubber and resin layer to ensure strength. Depending on the belt application, this reinforcing layer can be made of natural fibers such as cotton and hemp, polyamide, polyester, polyethylene, polyurethane, polystyrene, polyfluoroethylene, polyacryl, polyvinyl alcohol, wholly aromatic polyester, and organic synthetic fibers such as aramid. Fabrics and cords made of twisted yarns are used. In applications where tension is required, these fabrics and cords are generally tensioned in the warp direction or cord axis direction of the fabric and at the same time subjected to high-temperature heat treatment to obtain desired physical properties, and then matrix rubber or matrix An adhesive for adhering the resin is adhered to the woven fabric or cord, and a matrix rubber or a matrix resin is applied thereon to manufacture a belt. It is not easy to bond these woven fabrics and cords to the matrix rubber or resin, and various studies have been made on bonding (for example, Patent Documents 1 and 2). However, since the types of rubber and resin used as a matrix differ depending on the environment in which the belt is used, there is a problem that an adhesive suitable for them must be used.
本発明の目的は、マトリックスとなるゴムや樹脂との接着性に優れたベルト用補強繊維およびベルトを提供することにある。 An object of the present invention is to provide a belt reinforcing fiber and a belt excellent in adhesiveness to rubber or resin as a matrix.
本発明者らは、上記課題を解決するため検討した結果、かかる課題は、ベルトの補強に用いる補強繊維であって、該繊維の横断面が３個以上の凸部を有する異型断面であり、該横断面の下記式で定義する異型断面係数が０．３〜０．８であり、かつ、該繊維の熱収縮応力の最大値が０．５ｃＮ／ｄｔｅｘ以下であることを特徴とするベルト用補強繊維により達成できることを見出した。
異型断面係数＝（異型単糸の内接円の直径）／（異型単糸の外接円の直径）
As a result of investigations to solve the above-mentioned problems, the present inventors have found that the problem is a reinforcing fiber used for belt reinforcement, and the cross section of the fiber has an atypical cross section having three or more convex portions, For a belt, wherein the atypical section modulus defined by the following formula of the transverse section is 0.3 to 0.8, and the maximum value of heat shrinkage stress of the fiber is 0.5 cN / dtex or less We have found that this can be achieved with reinforcing fibers.
Atypical section modulus = (diameter of inscribed circle of atypical single yarn) / (diameter of circumscribed circle of atypical single yarn)
本発明によれば、ベルトが使用される環境に応じてマトリックスとなるゴムや樹脂に適した接着剤を用いるといった煩雑な処理が不要となる、接着性に極めて優れたベルト用補強繊維を提供することができる。また、該補強繊維によって補強されたベルトを提供することができる。 According to the present invention, there is provided a belt reinforcing fiber having extremely excellent adhesiveness, which does not require a complicated process such as using an adhesive suitable for a rubber or a resin serving as a matrix depending on the environment in which the belt is used. be able to. Moreover, the belt reinforced with the reinforcing fiber can be provided.
本発明のベルト用補強繊維はベルトの補強に用いる補強繊維である。かかる強繊維としては、ナイロン６、ナイロン６６などからなるポリアミド繊維、ポリエチレンなどからなるポリオレフィン繊維でも良いが、特にポリエチレンテレフタレート、ポリエチレンナフタレートなどのからなるポリエステル繊維が望ましい。なお、上記ポリエチレンテレフタレートは、ポリエチレンテレフタレート単位を９０モル％以上含むものであればよく、１０モル％未満の範囲で適当な第３成分を含む共重合体であってもよい。また、ポリエチレンナフタレートは、エチレン−２，６−ナフタレート単位を９０モル％以上含むものであればよく、１０モル％未満の範囲で適当な第３成分を含む共重合体であってもよい。
The belt reinforcing fiber of the present invention is a reinforcing fiber used for belt reinforcement. Such strong fibers may be polyamide fibers made of
本発明の補強繊維は、その横断面が凸部を有する異型断面であり、図１の概略図に示すような中心部から外側に延びた凸部を有する異型断面を例示することができる。図１は３個の凸部を有する異型断面であり、図２は４個の凸部を有する異型断面である。 The reinforcing fiber of the present invention is an atypical cross section having a convex portion in its transverse cross section, and an atypical cross section having a convex portion extending outward from the central portion as shown in the schematic view of FIG. FIG. 1 is an atypical cross section having three convex portions, and FIG. 2 is an atypical cross section having four convex portions.
本発明においては、上記繊維の横断面が３個以上の凸部を有する異型断面であり、該横断面の下記式で定義する異型断面係数が０．３〜０．８であり、かつ、熱収縮応力の最大値が０．５ｃＮ／ｄｔｅｘ以下であることが肝要である。これにより、接着性に極めて優れた補強繊維とすることができる。
異型断面係数＝（異型断面の内接円の直径）／（異型断面の外接円の直径）
In the present invention, the cross section of the fiber is an atypical cross section having three or more convex portions, the atypical cross section coefficient defined by the following formula of the cross section is 0.3 to 0.8, and heat It is important that the maximum value of the shrinkage stress is 0.5 cN / dtex or less. Thereby, it can be set as the reinforcement fiber excellent in adhesiveness.
Atypical section modulus = (diameter of inscribed circle of atypical section) / (diameter of circumscribed circle of atypical section)
なお、異型断面の内接円の直径及び外接円の直径は、単繊維の断面写真に図１に示すように内接円及び外接円を描きａ及びｂで示す直径を測定することにより求めることができる。 In addition, the diameter of the inscribed circle and the circumscribed circle of the atypical cross section are obtained by drawing the inscribed circle and the circumscribed circle as shown in FIG. 1 in the cross-sectional photograph of the single fiber and measuring the diameters indicated by a and b. Can do.
すなわち、繊維の横断面における凸部の数が３個未満では、十分な接着性を得ることができない。一方、凸の数があまり多くても、マトリックスであるゴムや樹脂が凸部間に形成される凹部に入り込み難くなるため、凸部の数は、好ましくは３〜８個であり、より好ましくは３〜６個である。 That is, if the number of convex portions in the cross section of the fiber is less than 3, sufficient adhesion cannot be obtained. On the other hand, even if the number of protrusions is too large, it is difficult for rubber or resin as a matrix to enter the recesses formed between the protrusions, so the number of protrusions is preferably 3 to 8, more preferably 3-6.
また、上記異型断面係数が０．３未満ではマトリックスに対するアンカー効果が十分とならず本発明の目的とする高い接着性が得られない。一方、上記異型断面係数が０．８を超えるとマトリックスにアンカーとして突き出す凸部の強度が十分でなくなり、しいては繊維の強度が低下する傾向にあり好ましくない。 On the other hand, when the atypical section modulus is less than 0.3, the anchor effect on the matrix is not sufficient, and the high adhesiveness intended by the present invention cannot be obtained. On the other hand, if the atypical section modulus exceeds 0.8, the strength of the convex portion protruding as an anchor to the matrix becomes insufficient, and the strength of the fiber tends to decrease, which is not preferable.
さらに、本発明の補強繊維は、熱収縮応力の最大値が０．５ｃＮ／ｄｔｅｘ以下である必要があり、これにより熱接着性をより向上させることができる。特に、本発明においては、前述した異型断面による効果と上記の熱収縮応力を低く設定する効果との相乗効果によりさらに高い接着性を実現できることがわかった。
上記補強繊維の繊度は特に制限されないが、取扱い性や繊維の成形性などの観点から、１〜１０ｄｔｅｘが好ましく、３〜６ｄｔｅｘがより好ましい。
Furthermore, the reinforcing fiber of the present invention needs to have a maximum value of heat shrinkage stress of 0.5 cN / dtex or less, which can further improve the thermal adhesiveness. In particular, in the present invention, it has been found that higher adhesiveness can be realized by a synergistic effect of the effect of the above-described modified cross section and the effect of setting the heat shrinkage stress low.
The fineness of the reinforcing fiber is not particularly limited, but 1 to 10 dtex is preferable and 3 to 6 dtex is more preferable from the viewpoints of handleability and fiber moldability.
補強繊維の形態としては、特に制限はなく、長繊維、一定長あるいはランダム長に切断したカットファイバー、紡績糸などのいずれでも良い。さらに、該補強繊維をコード、織物、編物、不織布などの形態としてゴム補強材に用いても良い。コードの撚数や織編物の目付などにも特に制限はなく、要求物性に応じて適宜決定すればよい。 The form of the reinforcing fiber is not particularly limited, and may be any of a long fiber, a cut fiber cut into a fixed length or a random length, a spun yarn, and the like. Further, the reinforcing fiber may be used as a rubber reinforcing material in the form of a cord, woven fabric, knitted fabric, non-woven fabric or the like. There are no particular restrictions on the number of twisted cords or the basis weight of the woven or knitted fabric, and it may be determined appropriately according to the required physical properties.
なお、本発明の補強繊維をコードや織物としてゴム補強材として用いる場合、該コードや織物は全てが本発明の補強繊維で構成されている必要はないが、該コードや該織物の、好ましく３０％重量以上、より好ましくは５０重量％以上が本発明の補強繊維で構成されていることが望ましい。 When the reinforcing fiber of the present invention is used as a rubber reinforcing material as a cord or woven fabric, it is not necessary that the cord or woven fabric is entirely composed of the reinforcing fiber of the present invention. It is desirable that at least% by weight, more preferably at least 50% by weight, be composed of the reinforcing fiber of the present invention.
本発明の補強繊維は、例えば下記の方法で製造することができる。すなわち、エチレンテレフタレートを主たる繰返し単位とする固有粘度が０．８以上、好ましくは１．０以上、より好ましくは１．１以上のポリエステルを、常法にしたがって、紡糸口金より吐出後、引取速度１０００ｍ／分以下、好ましくは７００〜９００ｍ／分で溶融紡糸する。引取速度が１０００ｍ／分を超える場合には、得られる未延伸糸の結晶化度が高くなるため、前述の熱応力に関する要件を満足する延伸糸を得ることが困難になるだけでなく、タフネスの高いものも得難くなる。なお、紡糸口金より溶融吐出した糸条は、紡糸口金直下に設けた融点以上に加熱された領域を通過させて遅延冷却することが好ましい。 The reinforcing fiber of the present invention can be produced, for example, by the following method. That is, a polyester having an intrinsic viscosity of ethylene terephthalate as a main repeating unit of 0.8 or more, preferably 1.0 or more, more preferably 1.1 or more is discharged from a spinneret according to a conventional method, and a take-off speed of 1000 m / Min or less, preferably 700 to 900 m / min. When the take-up speed exceeds 1000 m / min, the degree of crystallinity of the undrawn yarn obtained becomes high, so that it becomes difficult not only to obtain a drawn yarn satisfying the above-mentioned requirements regarding thermal stress, but also toughness It is difficult to get expensive ones. The yarn melted and discharged from the spinneret is preferably delayed cooled by passing through a region heated above the melting point provided immediately below the spinneret.
得られた未延伸糸は、一旦巻き取ることなく連続して延伸ローラ群にて多段延伸し、次いで弛緩ローラを介して巻取る。このとき、本発明においては、最終段の延伸で、その延伸張力を０．２０〜０．２５ｃＮ／ｄＴｅｘとする必要がある。また、最終延伸ローラの表面温度は２５０℃〜２５７℃の高温度で０．０２〜０．０７ｃＮ／ｄｔｅｘの張力下弛緩熱処理する必要がある。ここで最終延伸ローラの表面温度が２５０℃以下では、熱収縮応力の最大値が０．５ｃＮ／ｄｔｅｘ以下の繊維を得ることができなくなる。一方、２５７℃を超える場合には、ポリエステルの融点近傍であるため、最終延伸ローラへの捲付きが発生した場合に融着を引き起こして生産性が低下するので好ましくない。また、弛緩張力が０．０２ｃＮ／ｄＴｅｘ未満では低すぎ、ローラ上をターンさせている糸条同士が接触して捲付きを発生しやすくなり、逆に０．０７ｃＮ／ｄｔｅｘを超える場合では高すぎ、熱収縮応力の最大値が０．５ｃＮ／ｄｔｅｘ以下の繊維を得ることができなくなる。得られた延伸糸は、通常３０００〜５０００ｍ／分の速度で巻き取るのが好ましい。 The obtained undrawn yarn is continuously wound by a group of stretching rollers without being wound once, and then wound through a relaxation roller. At this time, in this invention, it is necessary to make the extending | stretching tension | tensile_strength 0.20-0.25cN / dTex by extending | stretching of the last stage. Moreover, the surface temperature of the final drawing roller needs to be a heat treatment under a tension of 0.02 to 0.07 cN / dtex at a high temperature of 250 ° C. to 257 ° C. Here, when the surface temperature of the final drawing roller is 250 ° C. or less, it becomes impossible to obtain a fiber having a maximum value of heat shrinkage stress of 0.5 cN / dtex or less. On the other hand, when it exceeds 257 ° C., it is in the vicinity of the melting point of the polyester, and therefore when the wrinkle occurs on the final drawing roller, it causes fusion and decreases in productivity, which is not preferable. Also, if the relaxation tension is less than 0.02 cN / dTex, it is too low, and the yarns turning on the rollers are likely to come into contact with each other to easily cause wrinkles. Conversely, if the tension exceeds 0.07 cN / dtex, it is too high. Further, it becomes impossible to obtain a fiber having a maximum heat shrinkage stress of 0.5 cN / dtex or less. The obtained drawn yarn is usually preferably wound at a speed of 3000 to 5000 m / min.
なお、本発明に係る補強層の緊張及び熱処理は、一般に次のように行われる。補強層を１８０〜２４０℃の高温処理槽に０．５〜４分程度入れると同時に１．０ｃＮ／ｄｔｅｘ以下の張力で緊張せしめる。その後、マトリックスであるゴムあるいは樹脂とを接着せしめる接着剤を補強層にコーティングあるいは浸漬し、必要に応じて１００〜２５０℃の熱処理を施す。 In addition, the tension | tensile_strength and heat processing of the reinforcement layer which concern on this invention are generally performed as follows. The reinforcing layer is placed in a high-temperature treatment bath at 180 to 240 ° C. for about 0.5 to 4 minutes, and at the same time tensioned with a tension of 1.0 cN / dtex or less. Thereafter, an adhesive for adhering the matrix rubber or resin is coated or immersed in the reinforcing layer, and heat treatment at 100 to 250 ° C. is performed as necessary.
接着剤としては、特に限定はされないが、マトリックスがゴムの場合には、一般にＲＦＬ（レゾノレシン・ホルマリン・ラテックス）液にイソシアネート系接着剤を添加した処理液を使用する。 The adhesive is not particularly limited, but when the matrix is rubber, a treatment liquid in which an isocyanate adhesive is added to an RFL (resonoresin / formalin / latex) liquid is generally used.
ここで、ＲＦＬのラテックスとしては、ビニノレピリジン、ＳＢＲ、ＮＲ、ＣＲ、ＮＢＲ，ＥＰＤＭ等のいずれでも良くベルトの使用ゴムに応じて適宜決定される。また、イソシアネート系接着剤としては、特に限定はされないが、カプロラクタム系ブロックドイソシアネート、フェノール系ブロックドイソシアネート、トルエンジイソシアネート系などを使用することができ、通常の場合は、ＲＦＬ液に１〜１０重量％程度の割合で添加される。さらに、イソシアネートの代わりに、又はイソシアネートと併用して、エポキシ系接着剤を使用することも可能である。 Here, the latex of RFL may be any of vinylol pyridine, SBR, NR, CR, NBR, EPDM, etc., and is appropriately determined according to the rubber used for the belt. In addition, the isocyanate-based adhesive is not particularly limited, but caprolactam-based blocked isocyanate, phenol-based blocked isocyanate, toluene diisocyanate-based, and the like can be used. It is added at a rate of about%. Furthermore, it is also possible to use an epoxy adhesive in place of or in combination with isocyanate.
本発明の補強ベルトは、このような補強繊維を用いること以外は、従来の補強ベルトと同様の構成とされており、例えば、上下１層ずつの２層の未加硫カバーゴム間に、接着ゴムをコートした補強層を必要量介在させて、加圧加熱して加硫一体化するなどの方法で製造することができる。 The reinforcing belt of the present invention has the same configuration as that of a conventional reinforcing belt except that such reinforcing fibers are used. For example, the reinforcing belt is bonded between two upper and lower unvulcanized cover rubbers. It can be produced by a method in which a necessary amount of a rubber-coated reinforcing layer is interposed, and pressure-heated and vulcanized and integrated.
以下に実施例及び比較例を挙げて本発明をより具体的に説明する。
（１）固有粘度
オルソクロロフェノールにより常法により測定した。
（２）異型断面係数
顕微鏡により繊維横断面を１０００倍で観察し下記式により求めた。
異型断面係数＝（異型断面の内接円の直径）／（異型断面の外接円の直径）
（３）熱収縮応力の最大値
熱応力試料の一端を上部つかみに取り付け、初荷重０．０４ｃＮ／ｄｔｅｘをかけて固定する。次にこれを恒温槽に入れて室温から昇温速度４℃／分で２５０℃まで昇温し、生じた力をチャートに記録して読み取った。
熱応力（Ｎ／ｄｔｅｘ）＝（Ｆ−Ｆ’）／Ｄここで、Ｆは試料に生じた力（Ｎ）、Ｆ’は初荷重（Ｎ）、Ｄは試料繊度（ｄｔｅｘ）を表す。
（４）接着力
ＪＩＳ Ｋ６４０４−５に準じて測定した。
ベルトの補強布とマトリックスゴムとの接着力を、比較例１を比較とした指数にて表１に示した。指数の数値が大きい程、接着性に優れている。
Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.
(1) Intrinsic viscosity Measured by an ordinary method using orthochlorophenol.
(2) Atypical Section Coefficient The cross section of the fiber was observed with a microscope at a magnification of 1000 times, and determined according to the following formula.
Atypical section modulus = (diameter of inscribed circle of atypical section) / (diameter of circumscribed circle of atypical section)
(3) Maximum value of thermal shrinkage stress One end of the thermal stress sample is attached to the upper grip and fixed with an initial load of 0.04 cN / dtex. Next, this was put in a thermostatic chamber, heated from room temperature to 250 ° C. at a temperature rising rate of 4 ° C./min, and the resulting force was recorded on a chart and read.
Thermal stress (N / dtex) = (F−F ′) / D where F is the force (N) generated in the sample, F ′ is the initial load (N), and D is the sample fineness (dtex).
(4) Adhesive strength Measured according to JIS K6404-5.
The adhesive strength between the belt reinforcing fabric and the matrix rubber is shown in Table 1 as an index obtained by comparing Comparative Example 1. The larger the index value, the better the adhesion.
［実施例１］
固有粘度０．９５のポリエチレンテレフタレートのチップを、３つの凸部が形成される異型断面紡糸口金（吐出孔数１９２個）を用いて２９５℃で溶融吐出し、８００ｍ／分の引取速度で引き取る。これを、引き続き、０．２５ｃＮ／ｄｔｅｘの張力で、２段延伸し、次いで最終の弛緩ローラで０．０５ｃＮ／ｄｔｅｘの張力、及び２５５℃で熱セットして、１１００ｄｔｅｘ／２４９フィラメントのマルチフィラメントを得た。得られたマルチフィラメントの単フィラメントの凸部数および異型断面係数、マルチフィラメントの熱収縮応力の最大値を表１に示す。
[Example 1]
A polyethylene terephthalate chip having an intrinsic viscosity of 0.95 is melted and discharged at 295 ° C. using a modified cross-section spinneret (discharging hole number: 192) on which three convex portions are formed, and taken up at a take-up speed of 800 m / min. This was subsequently stretched in two steps with a tension of 0.25 cN / dtex and then heat set at a final relaxation roller of 0.05 cN / dtex and at 255 ° C. to obtain a multifilament of 1100 dtex / 249 filaments. Obtained. Table 1 shows the number of convex parts of the single filament of the obtained multifilament, the irregular section modulus, and the maximum value of the heat shrinkage stress of the multifilament.
また、このマルチフィラメントを２本、５０回／１０ｃｍの撚数で撚糸し経糸とした。一方、上記の同じ１１００デシテックス／１９２フィラメントのマルチフィラメントを１２回／１０ｃｍの撚数で撚糸し緯糸とし、これらを製織することでベルト用補強布を得た。 Further, two multifilaments were twisted at a twist number of 50 times / 10 cm to obtain warps. On the other hand, the same 1100 dtex / 192 filament multifilament was twisted at a twist of 12 times / 10 cm to form wefts, and these were woven to obtain a belt reinforcing fabric.
得られた補強布を、ＰＲＬ液にカプロラクタム系イソシアネートを４重量％添加した処理液に浸漬し、１２０〜１６０℃で徐々に昇温して合計５分間乾燥した後、２２０℃で１．５分間熱処理した。また、２枚の未加硫ＳＢＲ系ゴム間にＳＢＲゴム系接着ゴムをコートした補強布を１５ｋｇ／ｃｍ２、１５０℃、３０分間加熱加圧することにより、加硫接着一体化して、ベルトを成形した。結果を表１に示す。 The obtained reinforcing fabric was immersed in a treatment solution in which 4% by weight of caprolactam isocyanate was added to the PRL solution, gradually heated at 120 to 160 ° C. and dried for a total of 5 minutes, and then at 220 ° C. for 1.5 minutes. Heat treated. In addition, a reinforcing fabric coated with SBR rubber adhesive rubber between two unvulcanized SBR rubbers is heated and pressurized at 15 kg / cm 2 , 150 ° C. for 30 minutes, and vulcanized and bonded to form a belt. did. The results are shown in Table 1.
［実施例２〜３、比較例１〜２］
紡糸口金を変更し、凸部数、異型断面係数の異なるマルチフィラメントを製糸し、これを経糸と緯糸に用いた以外は実施例１と同様にした。結果を表１に示す。
[Examples 2-3, Comparative Examples 1-2]
The same procedure as in Example 1 was carried out except that the spinneret was changed, multifilaments having different numbers of convex portions and different profile sections were produced, and these were used for warps and wefts. The results are shown in Table 1.
［比較例３］
弛緩ローラで０．０７ｃＮ／ｄｔｅｘの張力、及び温度を２４５℃に変更してマルチフィラメントを製糸し、これを経糸と緯糸に用いた以外は、実施例１と同様にした。結果を表１に示す。
[Comparative Example 3]
The same procedure as in Example 1 was conducted, except that the tension of 0.07 cN / dtex and the temperature were changed to 245 ° C. with a loosening roller to produce a multifilament, which was used for warp and weft. The results are shown in Table 1.
本発明のベルト用補強繊維は、ゴムや樹脂との接着性に極めて優れており、例えば、マトリックスとなるゴムや樹脂にあわせて接着剤を選択するといった煩雑な処理を行わなくても、十分な接着性を発揮し該補強繊維からは高性能のベルトを製造することができる。このため、各種ベルトに幅広く用いることができる。 The belt reinforcing fiber of the present invention is extremely excellent in adhesiveness with rubber and resin, for example, sufficient without performing a complicated process such as selecting an adhesive according to the rubber or resin used as the matrix. A high-performance belt can be produced from the reinforcing fibers exhibiting adhesiveness. For this reason, it can be widely used for various belts.
ａ：異型断面の内接円の直径
ｂ：異型断面の外接円の直径
a: Diameter of the inscribed circle of the modified cross section b: Diameter of the circumscribed circle of the modified section
Claims (2)
異型断面係数＝（異型単糸の内接円の直径）／（異型単糸の外接円の直径） Reinforcing fiber used for belt reinforcement, wherein the cross section of the fiber is an atypical cross section having three or more convex portions, and the atypical cross section coefficient defined by the following formula of the cross section is 0.3 to 0.8 And the maximum value of the heat shrinkage stress of the fiber is 0.5 cN / dtex or less.
Atypical section modulus = (diameter of inscribed circle of atypical single yarn) / (diameter of circumscribed circle of atypical single yarn)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007051444A JP2008214792A (en) | 2007-03-01 | 2007-03-01 | Reinforcing fiber for belt and belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007051444A JP2008214792A (en) | 2007-03-01 | 2007-03-01 | Reinforcing fiber for belt and belt |
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| Publication Number | Publication Date |
|---|---|
| JP2008214792A true JP2008214792A (en) | 2008-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007051444A Pending JP2008214792A (en) | 2007-03-01 | 2007-03-01 | Reinforcing fiber for belt and belt |
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| JP (1) | JP2008214792A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5559923B1 (en) * | 2013-10-15 | 2014-07-23 | 進 庄司 | Split belt and split device |
| JP2016169452A (en) * | 2015-03-12 | 2016-09-23 | 帝人株式会社 | Profile synthetic fiber multifilament |
-
2007
- 2007-03-01 JP JP2007051444A patent/JP2008214792A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5559923B1 (en) * | 2013-10-15 | 2014-07-23 | 進 庄司 | Split belt and split device |
| JP2016169452A (en) * | 2015-03-12 | 2016-09-23 | 帝人株式会社 | Profile synthetic fiber multifilament |
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