JP2010121242A - Felt for paper machine - Google Patents
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- JP2010121242A JP2010121242A JP2008296722A JP2008296722A JP2010121242A JP 2010121242 A JP2010121242 A JP 2010121242A JP 2008296722 A JP2008296722 A JP 2008296722A JP 2008296722 A JP2008296722 A JP 2008296722A JP 2010121242 A JP2010121242 A JP 2010121242A
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本発明は、抄紙機用フェルトに関するものであり、さらに詳しくは紙を抄造する工程において、抄紙機のワイヤーパート（紙を抄く工程）におけるすき網、プレスパートにおけるプレスフェルト、ドライパートにおける乾燥部のドライキャンバス等として使用する抄紙機用フェルトに関するものである。 The present invention relates to a felt for a paper machine, and more particularly, in a paper making process, in a wire part (paper making process) of a paper machine, a press felt in a press part, and a drying part in a dry part. The present invention relates to a felt for a paper machine used as a dry canvas.
抄紙を製造する工程において、ワイヤーパート、プレスパート、ドライパートにおいて抄紙機用フェルトが用いられている。抄紙機用フェルトは、ワイヤーパートでは、漉き上げたばかりの水分を多量に含む紙料集合体（湿紙）を搬送し、次いで、プレスパート、ドライパートへ搬送するとともに湿紙に含まれている水分を搾り出して吸収し、あるいは吸収した水分を外部に排出している。抄紙機用フェルトの役割は、湿紙を次の工程へ搬送することを担っているが、紙の平滑性を高めることと良好に水分を搾り取ることも求められるためにプレスロールにて圧縮されることから、湿潤下で繰り返し圧縮されるので圧縮回復性も求められる。 In the paper manufacturing process, paper machine felts are used in wire parts, press parts, and dry parts. In the felt for paper machines, the wire part transports a stock aggregate (wet paper) containing a large amount of freshly brewed water, then transports it to the press part and dry part, and the moisture contained in the wet paper. Squeezed out and absorbed, or the absorbed moisture is discharged to the outside. The paper machine felt is responsible for transporting the wet paper to the next process, but it is compressed by a press roll because it is required to improve the smoothness of the paper and to squeeze out moisture well. Therefore, since compression is repeatedly performed under wet conditions, compression recovery is also required.
抄紙機用フェルトを構成する繊維ウェブとしては、ナイロン６やナイロン６６からなる繊維が用いられている（特許文献１）。また、ナイロン１２繊維を抄紙機用フェルトの繊維ウェブに適用することも提案されている（特許文献２）。ナイロン１２繊維は、アミド基含有率の低い部類に属し、低い吸水性であることから吸水による引張強力、弾力率、寸法変化率が少なく、酸化剤等に対する耐薬品性、耐水性、耐摩耗性に優れている。 As a fiber web constituting the felt for a paper machine, fibers made of nylon 6 or nylon 66 are used (Patent Document 1). It has also been proposed to apply nylon 12 fiber to the felt web of a paper machine (Patent Document 2). Nylon 12 fiber belongs to a class with low amide group content and has low water absorption, so there is little tensile strength, elasticity, dimensional change rate due to water absorption, chemical resistance against oxidants, water resistance, wear resistance, etc. Is excellent.
しかし、近年の抄紙機は、プレス部毎の吸水条件、温度条件、プレス負荷や摩擦等の条件がより厳しくなり、また、白水のクローズド化、ドライランニングの実施等によって、抄紙機用フェルトの素材に求められる要求特性は益々厳しくなっている。ナイロン６繊維やナイロン６６繊維では、繰り返し受ける圧縮により扁平化しやすく、扁平化によって搾水性に劣るフェルトは新規なフェルトとの交換を要し生産性に劣ることになる。また、ナイロン１２繊維の耐衝撃性は、吸水した状態では、ナイロン６繊維やナイロン６６繊維と同等レベルであって、耐衝撃性に優れているとはいえない。
本発明は、湿紙が含む酸化剤や塩類等の薬品を含んだ水分を搾り取っても物性が低下しにくく、繰り返し圧縮により扁平化しにくい、耐久性を備えた抄紙機用フェルトを提供することを目的とする。 The present invention provides a felt for a paper machine that has durability and is not easily flattened by repeated compression, even if moisture containing a chemical such as an oxidizing agent or salt contained in a wet paper is squeezed. With the goal.
本発明者らは上記課題を解決すべく鋭意検討の結果、オリゴマー含量の低いナイロン１１を繊維表面に配した繊維を抄紙機用フェルトの繊維ウェブとして適用すると、耐久性に優れることを見出し、本発明に到達した。 As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that when a fiber in which nylon 11 having a low oligomer content is arranged on the fiber surface is applied as a fiber web of a paper machine felt, the present invention has excellent durability. The invention has been reached.
すなわち、本発明は、基材の少なくとも片面に繊維ウェブ層が積層した抄紙機用フェルトであり、基材の少なくとも片面に積層される繊維ウェブ層には、モノマー量が０．３５％未満のナイロン１１が少なくとも繊維表面に配されてなる繊維を含むことを特徴とする抄紙機用フェルトを要旨とするものである。 That is, the present invention is a felt for a paper machine in which a fiber web layer is laminated on at least one side of a substrate, and the fiber web layer laminated on at least one side of the substrate has a monomer amount of less than 0.35% nylon. The gist of the present invention is a paper machine felt, wherein 11 includes fibers formed on at least the fiber surface.
また、本発明は、モノマー量が０．３５％未満のナイロン１１が少なくとも繊維表面に配されてなる繊維を含む繊維ウェブであることを特徴とする抄紙機用フェルトに用いる繊維ウェブを要旨とするものである。 Further, the gist of the present invention is a fiber web used for a felt for a paper machine, which is a fiber web containing fibers in which a nylon 11 having a monomer amount of less than 0.35% is arranged on at least the fiber surface. Is.
以下、本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明は、少なくとも繊維表面にモノマー量が０．３５％未満のナイロン１１が配された繊維（以下、「ナイロン１１繊維」ともいう。）を用いられる。ナイロン１１は、ヒマ（トウゴマ）の種子から抽出されたひまし油を元に、１１−アミノウンデカン酸を生成、合成しこれを重縮合して得られるものである。したがって、本発明に用いるナイロン１１繊維は、再生が可能な植物を由来とするポリマー成分を繊維表面に配した繊維であり、地球環境に配慮した繊維といえる。 In the present invention, a fiber in which nylon 11 having a monomer amount of less than 0.35% is disposed on the fiber surface (hereinafter, also referred to as “nylon 11 fiber”) is used. Nylon 11 is obtained by synthesizing and synthesizing 11-aminoundecanoic acid based on castor oil extracted from castor seeds. Therefore, the nylon 11 fiber used in the present invention is a fiber in which a polymer component derived from a plant that can be regenerated is arranged on the fiber surface, and can be said to be a fiber that takes the global environment into consideration.
本発明で用いるナイロン１１は、モノマー量の合計が０．３５％未満となるのであれば、少量のε−カプロラクタムやヘキサメチレンジアンモニウムアジペートなどの他のポリアミド形成単量体を共重合したものであってもよく、また、本発明の目的が達成される範囲において、ナイロン６やナイロン６６等の他のポリアミドをブレンドしたものでもよい。さらには、ナイロン１１中に、効果を損なわない範囲であれば、酸化防止剤、可塑剤、難燃剤、艶消剤、無機充填剤、補強剤、耐熱剤、着色剤、顔料等の各種添加剤を含有していてもよい。 Nylon 11 used in the present invention is obtained by copolymerizing a small amount of other polyamide-forming monomers such as ε-caprolactam and hexamethylene diammonium adipate if the total amount of monomers is less than 0.35%. In addition, other polyamides such as nylon 6 and nylon 66 may be blended as long as the object of the present invention is achieved. Furthermore, various additives such as an antioxidant, a plasticizer, a flame retardant, a matting agent, an inorganic filler, a reinforcing agent, a heat-resistant agent, a colorant, and a pigment are included in the nylon 11 as long as the effect is not impaired. May be contained.
ナイロン１１繊維は、単糸の横断面形状において、繊維表面がナイロン１１によって覆われたものである。繊維表面を完全にナイロン１１によって被覆することによって、物理的、化学的な耐久性を備えた優れた抄紙機用フェルトとして、良好な特性を発揮することができる。ナイロン１１繊維において、単糸すべてがナイロン１１のみによって構成される単成分型のものでもよいが、他の熱可塑性樹脂とナイロン１１とを複合した複合型のものであってもよい。 Nylon 11 fibers are those in which the fiber surface is covered with nylon 11 in the cross-sectional shape of a single yarn. By completely covering the fiber surface with nylon 11, good characteristics can be exhibited as an excellent paper machine felt having physical and chemical durability. Nylon 11 fibers may be of a single component type in which all single yarns are composed only of nylon 11, but may be of a composite type in which another thermoplastic resin and nylon 11 are combined.
複合型の場合は、鞘部にナイロン１１を配し、芯部に他の熱可塑性樹脂を配した芯鞘型形状のもの、最外層にナイロン１１を配し、その他の層に他の熱可塑性樹脂を配した多層型形状のものが挙げられる。ナイロン１１と複合する他の熱可塑性樹脂としては、ポリエステル系樹脂、ポリオレフィン系樹脂、ポリアミド系樹脂等が挙げられる。中でも、接合面の剥離を防止する観点から相溶性が良好なポリアミド系樹脂を採用することが好ましく、ナイロン６やナイロン６６、ナイロン６１０、ナイロン４６、ナイロン１２等が挙げられる。また、ナイロン１１よりも安価な熱可塑性樹脂と複合することによって、コスト的にも有利なものが得られる。複合型のナイロン１１繊維において、繊維中に占めるナイロン１１の割合は２０質量％以上とすることが好ましく、３０質量％以上であることがより好ましい。ナイロン１１の割合を２０質量％以上とすることにより、繊維表面をナイロン１１にて良好に被覆することができ、寸法安定性が良好で、物性変化や扁平化しにくい抄紙機用フェルトを得ることができる。 In the case of the composite type, a core-sheath type shape in which nylon 11 is arranged in the sheath and another thermoplastic resin is arranged in the core, nylon 11 is arranged in the outermost layer, and other thermoplastics are arranged in the other layers. The thing of the multilayer type shape which distribute | arranged resin is mentioned. Examples of other thermoplastic resins combined with nylon 11 include polyester resins, polyolefin resins, and polyamide resins. Among them, it is preferable to employ a polyamide-based resin having good compatibility from the viewpoint of preventing the joint surface from peeling, and examples thereof include nylon 6, nylon 66, nylon 610, nylon 46, and nylon 12. In addition, by combining with a thermoplastic resin that is cheaper than nylon 11, an advantageous cost can be obtained. In the composite type nylon 11 fiber, the proportion of nylon 11 in the fiber is preferably 20% by mass or more, and more preferably 30% by mass or more. By setting the ratio of nylon 11 to 20% by mass or more, it is possible to satisfactorily coat the fiber surface with nylon 11, to obtain a felt for a paper machine that has good dimensional stability and is difficult to change in properties or flatten. it can.
ナイロン１１繊維の形状は、単成分型および複合型ともに円形断面のみでなく、三角、四角等の多角形や多葉形等の異形断面形状であってもよい。 The shape of the nylon 11 fiber is not limited to a circular cross section in both the single component type and the composite type, but may be a polygonal shape such as a triangle or a square, or a modified cross sectional shape such as a multileaf shape.
本発明で用いるナイロン１１は、モノマー量が０．３５％以下である。ナイロン１１中のモノマー量が少ないと、強伸度特性（タフネス）、耐薬品性、耐水性、耐摩耗性がより優れたものとなる。さらに、抄紙の製造工程で受ける繰り返し圧縮に対して疲労しにくく、抄紙機用フェルトの厚みが減じて繊維間の空隙が密になることが抑制されて、圧縮回復性に優れたものとなる。 Nylon 11 used in the present invention has a monomer amount of 0.35% or less. When the amount of the monomer in the nylon 11 is small, the strength characteristics (toughness), chemical resistance, water resistance, and abrasion resistance are more excellent. Furthermore, it is difficult to fatigue due to repeated compression received in the paper manufacturing process, and the thickness of the paper machine felt is reduced to prevent the gaps between the fibers from becoming dense, resulting in excellent compression recovery.
なお、本発明において、ナイロン１１のモノマー量の測定は、以下の方法によって行う。すなわち、ナイロン１１チップを凍結粉砕して１ｍｍ角以下になるようにし、これを０．５ｇ分精秤し、純水１０ｍｌを添加して、６０℃のウォーターバス中で２時間抽出する。０．４５μｍのフィルターでろ過し、ＧＣ／ＭＳ測定用試料とし、以下に示す条件でＧＣ／ＭＳの測定を行うものである。
装置：ＧＣ：アジレント ６８９０Ｎ、ＭＳ：アジレント ５９７５Ｃ
カラム：５％−ジフェニル−９５％−ジメチルポリシロキサン
カラム温度：５０℃、昇温測定 ２０℃／分
キャリアガス：ヘリウム
注入口温度：２５０℃、注入量１μリットル、スプリット比 １０：１
検出器温度：２８０℃
In the present invention, the monomer amount of nylon 11 is measured by the following method. That is, a nylon 11 chip is freeze-pulverized so that it becomes 1 mm square or less, 0.5 g of this is precisely weighed, 10 ml of pure water is added, and the mixture is extracted in a 60 ° C. water bath for 2 hours. The sample is filtered with a 0.45 μm filter to obtain a GC / MS measurement sample, and GC / MS measurement is performed under the following conditions.
Apparatus: GC: Agilent 6890N, MS: Agilent 5975C
Column: 5% -diphenyl-95% -dimethylpolysiloxane Column temperature: 50 ° C., temperature measurement 20 ° C./min Carrier gas: Helium
Inlet temperature: 250 ° C., injection volume 1 μl, split ratio 10: 1
Detector temperature: 280 ° C
ナイロン１１のモノマー量を０．３５％未満とする方法としては、チップとイオン交換水を向流で接触させ、浴比（チップ／イオン交換水）＝１／１０〜１／４、９７℃で８〜１６時間、抽出処理を行う方法が挙げられる。ナイロン１１繊維を得る際の原料であるナイロン１１として、モノマー量が０．３５％未満のものを用いれば、得られる繊維を構成するナイロン１１のモノマー量もまた０．３５％未満となる。 As a method of setting the amount of monomer of nylon 11 to less than 0.35%, the tip and ion-exchanged water are brought into contact with each other in countercurrent, and the bath ratio (chip / ion-exchanged water) = 1/10 to 1/4 at 97 ° C. The method of performing an extraction process for 8 to 16 hours is mentioned. If nylon 11 which is a raw material for obtaining nylon 11 fiber has a monomer amount of less than 0.35%, the monomer amount of nylon 11 constituting the resulting fiber will also be less than 0.35%.
本発明において、ナイロン１１繊維の引張強度は３．０ｃＮ／ｄｔｅｘ以上、伸度は５５％以下であることが好ましい。強度が３．０ｃＮ／ｄｔｅｘ未満であると、抄紙機用フェルトの繊維ウェブを構成する繊維として強度が不十分になることがある。伸度が５５％を超えると強度が不十分になることがある。なお、伸度の下限については、１５％程度とする。伸度が１５％に満たない場合、繊維の製造工程における延伸工程で、延伸ローラーに単糸が捲き付き切断する頻度が高くなって、生産性が低下するなどのコストアップ要因となるためである。 In the present invention, the nylon 11 fiber preferably has a tensile strength of 3.0 cN / dtex or more and an elongation of 55% or less. If the strength is less than 3.0 cN / dtex, the strength may be insufficient as a fiber constituting the fiber web of the paper machine felt. If the elongation exceeds 55%, the strength may be insufficient. The lower limit of elongation is about 15%. This is because when the elongation is less than 15%, the frequency of cutting the single roller on the drawing roller is increased in the drawing process in the fiber manufacturing process, resulting in a cost increase factor such as a decrease in productivity. .
ナイロン１１繊維の単糸繊度は５〜１００ｄｔｅｘが好ましく、より好ましくは１０〜５０ｄｔｅｘである。繊度が５ｄｔｅｘ未満では、繊維ウェブにおける繊維同士の空隙が密になりすぎて、搾水性に劣る傾向となる。一方、１００ｄｔｅｘを超えると、繊維ウェブの表面の平滑性が劣ることとなって、漉き上げた抄紙の表面に凹凸が付与される恐れがある。 The single yarn fineness of the nylon 11 fiber is preferably 5 to 100 dtex, more preferably 10 to 50 dtex. If the fineness is less than 5 dtex, the gap between the fibers in the fiber web becomes too dense, and the water squeezing tends to be inferior. On the other hand, if it exceeds 100 dtex, the smoothness of the surface of the fiber web will be inferior, and there is a risk that irregularities will be imparted to the surface of the rolled paper.
本発明の抄紙機用フェルトは、基材の少なくも片面に、前述したナイロン１１繊維を含む繊維ウェブ層を積層している。ナイロン１１繊維を含む繊維ウェブ層は、基材の両面に積層されていてもよい。繊維ウェブ層は、ナイロン１１繊維のみによって構成されていることが好ましいが、本発明の目的を達成する範囲内において、他の繊維を含んでもよい。 In the felt for a paper machine of the present invention, a fiber web layer containing the above-described nylon 11 fibers is laminated on at least one side of a substrate. The fiber web layer containing nylon 11 fibers may be laminated on both sides of the substrate. The fiber web layer is preferably composed only of nylon 11 fibers, but may contain other fibers within the scope of achieving the object of the present invention.
繊維ウェブ層は、ナイロン１１繊維を含み、構成繊維同士が機械的に絡合一体化したものであり、ニードルパンチ処理によって絡合一体化したものであることが好ましい。繊維ウェブ層の目付は、特に限定するものではないが、外力により破断しにくいとともに、搾水性を考慮して、５００〜２０００ｇ／ｍ２であるのが好ましく、より好ましくは８００〜１２００ｇ／ｍ２である。 The fiber web layer includes nylon 11 fibers, and the constituent fibers are mechanically entangled and integrated, and preferably entangled and integrated by needle punching. Basis weight of the fibrous web layer, is not particularly limited, with hardly broken by an external force, in view of the water squeezing capability is preferably from 500 to 2000 g / m 2, more preferably 800~1200g / m 2 It is.
本発明の抄紙機用フェルトにおける基材は、従来公知のものを用いるとよい。モノフィラメント糸あるいはモノフィラメントの撚糸で織られた織物を一枚あるいは二枚以上重ねたものを基材として用いればよい。また、本発明の抄紙機用フェルトを得るためには、基材の少なくとも片面に上記した繊維ウェブ層を積層し、ニードルパンチ処理を施すことによって、繊維ウェブ層と基材とを一体化すればよい。 A conventionally well-known thing is good for the base material in the felt for paper machines of this invention. What is necessary is just to use what laminated | stacked the woven fabric by the monofilament yarn or the twisted yarn of the monofilament one sheet or two or more sheets as a base material. Moreover, in order to obtain the felt for a paper machine of the present invention, the fiber web layer and the base material are integrated by laminating the above-described fiber web layer on at least one side of the base material and performing needle punching treatment. Good.
本発明によれば、繊維表面にナイロン１１が配された繊維であり、かつ、ナイロン１１中のモノマー量が０．３５％未満とすることにより、このナイロン１１繊維を含む繊維ウェブ層を用いることによって、強力に優れ、寸法安定性が良好で繰り返し圧縮に対して回復性が良好で、嵩へたりが少ない抄紙機用フェルトを提供することができる。 According to the present invention, a fiber web layer containing nylon 11 fiber is used by making nylon 11 on the fiber surface and making the amount of monomer in nylon 11 less than 0.35%. Therefore, it is possible to provide a felt for a paper machine that is excellent in strength, good in dimensional stability, good in recoverability against repeated compression, and low in bulk.
以下、本発明を実施例によりさらに詳細に説明する。なお、各種特性は、下記の方法によって測定した。
（１）強度、伸度：ＪＩＳ−Ｌ−１０１５ 引張強さ及び伸び率の標準時試験に記載の方法に従い、定速伸長型の試験機を使用し、つかみ間隔２０ｍｍ、引っ張り速度２０ｍｍ／分で測定した。
（２）目付（ｇ／ｍ２）：２０×２５ｃｍの試料を３カ所から切り取り、質量を測定し、単位面積１００ｍ２あたりの質量に換算し、その平均値を求めた。
（３）耐薬品性：繊維を次亜塩素酸ナトリウム水溶液（有効塩素５００ｐｐｍ）に室温で２週間浸漬した後、強度を測定した。浸漬後の強度を上記にて得られた初期強度の値で除し、１００を乗じた値を算出し、耐薬品性を評価した。
（４）湿潤時の繰り返し圧縮に対する耐へたり性：繊維ウェブより１００ｍｍ角の試験片を切り出し、切り出した複数の試験片を積み重ねて３０ｍｍ以上の厚みのサンプルとして、厚み（ｄ１）を測定した後、ＪＩＳ Ｋ６４００−４（２００４） ６．繰り返し圧縮残留ひずみ試験 Ｂ法（定変位法）に準拠し、８００００回繰り返し圧縮を行った。また、圧縮試験をする際、２時間毎に１回、２０ｍｌの水を均一にサンプル上に散布し、湿潤下にて圧縮試験を行った。圧縮試験終了後、一昼夜サンプルを風乾した後の厚み（ｄ２）を測定し、下式で嵩高性保持率Ｔ（％）を算出し、へたりにくさの尺度とした。Ｔの値が大きいほど、へたりにくいものである。
Ｔ（％）＝［ｄ２／ｄ１］×１００
Hereinafter, the present invention will be described in more detail with reference to examples. Various characteristics were measured by the following methods.
(1) Strength and elongation: JIS-L-1015 Measured with a constant speed extension type tester at a grip interval of 20 mm and a pulling speed of 20 mm / min according to the method described in the standard test of tensile strength and elongation. did.
(2) Weight per unit area (g / m 2 ): A 20 × 25 cm sample was cut out from three locations, the mass was measured, converted to the mass per unit area of 100 m 2 , and the average value was obtained.
(3) Chemical resistance: After immersing the fiber in a sodium hypochlorite aqueous solution (effective chlorine 500 ppm) at room temperature for 2 weeks, the strength was measured. The strength after immersion was divided by the initial strength value obtained above, and a value multiplied by 100 was calculated to evaluate chemical resistance.
(4) Sag resistance against repeated compression when wet: 100 mm square test pieces were cut out from the fiber web, and the thickness (d 1 ) was measured as a sample having a thickness of 30 mm or more by stacking the cut out test pieces. Later, JIS K6400-4 (2004). Repeated compression residual strain test Based on the method B (constant displacement method), compression was repeated 80000 times. Moreover, when performing the compression test, 20 ml of water was uniformly sprayed on the sample once every two hours, and the compression test was performed under wet conditions. After completion of the compression test, the thickness (d 2 ) after the sample was air-dried all day and night was measured, and the bulk retention T (%) was calculated according to the following formula, which was used as a measure for the difficulty of sag. The larger the value of T, the more difficult it is to sag.
T (%) = [d 2 / d 1 ] × 100
実施例１
相対粘度（９６％硫酸を溶媒として、濃度１ｇ／ｄｌ、温度２５℃で測定）が２．０１、モノマー量が０．２５％のナイロン１１チップを用い、このチップの水分率を０．０５質量％に調整した後、エクストルーダー型溶融押出機に供給し、紡糸温度２３０℃で溶融紡糸した。紡出糸条を冷却風で冷却したあと、引き取り速度１０００ｍ／分で引き取って未延伸糸条を得た。得られた糸条を集束し、３３万ｄｔｅｘのトウにして延伸倍率３．０倍で延伸し、機械クリンパーにて捲縮を付与した後、仕上げ油剤を０．３％付与した。その後、１４０℃の乾燥機で乾燥、熱処理して長さ７６ｍｍに切断した。得られたナイロン１１繊維は単糸繊度１５ｔｅｘ、強度３．８ｃＮ／ｄｔｅｘ、伸度４６％、捲縮数１３．６ヶ／２５ｍｍ、捲縮率１８．３％であった。
Example 1
A nylon 11 chip having a relative viscosity (measured at a concentration of 1 g / dl and a temperature of 25 ° C. using 96% sulfuric acid as a solvent) of 2.01 and a monomer amount of 0.25% was used, and the moisture content of this chip was 0.05 mass. After adjusting to%, it was supplied to an extruder type melt extruder and melt-spun at a spinning temperature of 230 ° C. After cooling the spun yarn with cooling air, the spun yarn was drawn at a take-up speed of 1000 m / min to obtain an undrawn yarn. The obtained yarn was converged, and the tow of 330,000 dtex was drawn at a draw ratio of 3.0 times. After crimping with a mechanical crimper, 0.3% of finishing oil was given. Then, it dried with 140 degreeC dryer and heat-processed, and cut | disconnected to 76 mm in length. The obtained nylon 11 fiber had a single yarn fineness of 15 tex, a strength of 3.8 cN / dtex, an elongation of 46%, a number of crimps of 13.6 / 25 mm, and a crimp rate of 18.3%.
得られたナイロン１１繊維をカード機に通して、カードウェブを作成し、得られたカードウェブにニードルパンチ処理を施して、目付１０１０ｇ／ｍ２、厚さ５．２mmの抄紙機用フェルトに用いる繊維ウェブを得た。ナイロン１１繊維の特性および得られた繊維ウェブの特性を表１に示す。 The obtained nylon 11 fiber is passed through a card machine to prepare a card web, and the obtained card web is subjected to needle punching and used in a felt for a paper machine having a basis weight of 1010 g / m 2 and a thickness of 5.2 mm. A fiber web was obtained. The properties of the nylon 11 fibers and the properties of the resulting fiber web are shown in Table 1.
実施例２
相対粘度（９６％硫酸を溶媒として、濃度１ｇ／ｄｌ、温度２５℃で測定）が２．４９、モノマー量が０．０５％のナイロン１１チップを用い、紡糸温度２６５℃とすること以外は実施例１と同様にして単糸繊度２０．５ｄｔｅｘ、強度４．２ｃＮ／ｄｔｅｘ、伸度４０％、捲縮数１１．７ヶ／２５ｍｍ、捲縮率１９．８％のナイロン１１繊維を得た。得られたナイロン１１繊維を用い、実施例１と同様にして抄紙機用フェルトに用いる繊維ウェブを得た。得られた繊維ウェブの目付９７０ｇ／ｍ２、厚さ５．０mmであった。ナイロン１１繊維の特性および繊維ウェブの特性を表１に示す。
Example 2
Nylon 11 chip with relative viscosity (96% sulfuric acid as solvent, concentration 1 g / dl, temperature 25 ° C.) 2.49, monomer amount 0.05% is used except spinning temperature 265 ° C. In the same manner as in Example 1, a nylon 11 fiber having a single yarn fineness of 20.5 dtex, a strength of 4.2 cN / dtex, an elongation of 40%, a number of crimps of 11.7 pcs / 25 mm, and a crimp rate of 19.8% was obtained. Using the obtained nylon 11 fiber, a fiber web used for a paper machine felt was obtained in the same manner as in Example 1. The obtained fiber web had a basis weight of 970 g / m 2 and a thickness of 5.0 mm. The properties of nylon 11 fibers and the properties of the fiber web are shown in Table 1.
実施例３
相対粘度（９６％硫酸を溶媒として、濃度１ｇ／ｄｌ、温度２５℃で測定）が３．２５、融点２６０℃のナイロン６６チップを芯成分とし、相対粘度が２．４９、モノマー量が０．０５％のナイロン１１を鞘成分として用い、両成分を複合紡糸装置に導入し、単糸の形状を芯鞘型複合繊維となるようにして２９０℃で溶融紡糸を行った。このとき、芯成分と鞘成分の質量比（芯成分：鞘成分）は５０：５０とした。
Example 3
Nylon 66 chip having a relative viscosity (measured at 96% sulfuric acid as a solvent at a concentration of 1 g / dl and a temperature of 25 ° C.) of 3.25 and a melting point of 260 ° C. as a core component, a relative viscosity of 2.49, and a monomer amount of 0.2. 05% nylon 11 was used as a sheath component, both components were introduced into a composite spinning apparatus, and melt spinning was performed at 290 ° C. so that the shape of the single yarn became a core-sheath type composite fiber. At this time, the mass ratio of the core component to the sheath component (core component: sheath component) was 50:50.
紡出糸条を冷却風で冷却したあと、引き取り速度１０００ｍ／分で引き取って未延伸糸条を得た。得られた糸条を集束し、３３万ｄｔｅｘのトウにして延伸倍率２．８倍で延伸し、機械クリンパーにて捲縮を付与した後、仕上げ油剤を０．３％付与した。その後１４０℃の乾燥機で乾燥、熱処理して長さ７６ｍｍに切断した。得られた複合型のナイロン１１繊維は単糸繊度３２ｄｔｅｘ、強度３．１ｃＮ／ｄｔｅｘ、伸度４５％、捲縮数１２．９ヶ／２５ｍｍ、捲縮率２１．５％であった。得られた複合型のナイロン１１繊維を用い、実施例１と同様にして抄紙機用フェルトに用いる繊維ウェブを得た。得られた繊維ウェブの目付９８５ｇ／ｍ２、厚さ５．５mmであった。ナイロン１１繊維の特性および繊維ウェブの特性を表１に示す。 After cooling the spun yarn with cooling air, the spun yarn was drawn at a take-up speed of 1000 m / min to obtain an undrawn yarn. The obtained yarn was converged, and the tow of 330,000 dtex was drawn at a draw ratio of 2.8 times. After crimping with a mechanical crimper, 0.3% of finishing oil was given. Thereafter, it was dried and heat-treated with a dryer at 140 ° C. and cut into a length of 76 mm. The obtained composite nylon 11 fiber had a single yarn fineness of 32 dtex, a strength of 3.1 cN / dtex, an elongation of 45%, a number of crimps of 12.9 / 25 mm, and a crimp rate of 21.5%. Using the obtained composite type nylon 11 fiber, a fiber web used for a paper machine felt was obtained in the same manner as in Example 1. The obtained fiber web had a basis weight of 985 g / m 2 and a thickness of 5.5 mm. The properties of nylon 11 fibers and the properties of the fiber web are shown in Table 1.
実施例４
相対粘度（９６％硫酸を溶媒として、濃度１ｇ／ｄｌ、温度２５℃で測定）が３．５０のナイロン６チップを芯成分とし、紡糸温度２６０℃としたこと以外は、実施例３と同様にして実施した。
Example 4
Except that the relative viscosity (measured at 96% sulfuric acid as a solvent, concentration 1 g / dl, temperature 25 ° C.) nylon 6 chip of 3.50 as a core component and spinning temperature 260 ° C., was the same as in Example 3. Carried out.
得られた複合型のナイロン１１繊維は、単糸繊度３８ｄｔｅｘ、強度３．３ｃＮ／ｄｔｅｘ、伸度４４％、捲縮数１３．５ヶ／２５ｍｍ、捲縮率２１．２％であった。得られたナイロン１１繊維を用い、実施例１と同様にして抄紙機用フェルトに用いる繊維ウェブを得た。得られた繊維ウェブの目付１００５ｇ／ｍ２、厚さ５．７mmであった。ナイロン１１繊維の特性および繊維ウェブの特性を表１に示す。 The obtained composite type nylon 11 fiber had a single yarn fineness of 38 dtex, a strength of 3.3 cN / dtex, an elongation of 44%, a number of crimps of 13.5 / 25 mm, and a crimp rate of 21.2%. Using the obtained nylon 11 fiber, a fiber web used for a paper machine felt was obtained in the same manner as in Example 1. The obtained fiber web had a basis weight of 1005 g / m 2 and a thickness of 5.7 mm. The properties of nylon 11 fibers and the properties of the fiber web are shown in Table 1.
実施例５
相対粘度（９６％硫酸を溶媒として、濃度１ｇ／ｄｌ、温度２５℃で測定）が１．９８、モノマー量が０．３３％のナイロン１１チップを用いたこと以外は、実施例１と同様にしてナイロン１１繊維を得た。
Example 5
Except that a nylon 11 chip having a relative viscosity (96% sulfuric acid as a solvent and a concentration of 1 g / dl at a temperature of 25 ° C.) of 1.98 and a monomer amount of 0.33% was used, the same procedure as in Example 1 was performed. Nylon 11 fiber was obtained.
得られたナイロン１１繊維は、単糸繊度１５．２ｄｔｅｘ、強度３．２ｃＮ／ｄｔｅｘ、伸度４６％、捲縮数１２．４ヶ／２５ｍｍ、捲縮率１７．０％であった。得られたナイロン１１繊維を用い、実施例１と同様にして抄紙機用フェルトに用いる繊維ウェブを得た。得られた繊維ウェブの目付１０２０ｇ／ｍ２、厚さ５．１mmであった。ナイロン１１繊維の特性および繊維ウェブの特性を表１に示す。 The obtained nylon 11 fiber had a single yarn fineness of 15.2 dtex, a strength of 3.2 cN / dtex, an elongation of 46%, a number of crimps of 12.4 / 25 mm, and a crimp rate of 17.0%. Using the obtained nylon 11 fiber, a fiber web used for a paper machine felt was obtained in the same manner as in Example 1. The obtained fiber web had a basis weight of 1020 g / m 2 and a thickness of 5.1 mm. The properties of nylon 11 fibers and the properties of the fiber web are shown in Table 1.
比較例１
相対粘度（９６％硫酸を溶媒として、濃度１ｇ／ｄｌ、温度２５℃で測定）が３．５１、モノマー量が０．７％のナイロン１１チップを用い、紡糸温度２８５℃、延伸倍率３．２倍とすること以外は実施例１と同様にして繊維を得た。
Comparative Example 1
A nylon 11 chip having a relative viscosity of 3.51 (measured at a concentration of 1 g / dl and a temperature of 25 ° C. using 96% sulfuric acid as a solvent) and a monomer amount of 0.7% was used, a spinning temperature of 285 ° C., and a draw ratio of 3.2. A fiber was obtained in the same manner as in Example 1 except that it was doubled.
得られた繊維は、単糸繊度１６．２ｄｔｅｘ、強度２．７ｃＮ／ｄｔｅｘ、伸度４１％、捲縮数１２．５ヶ／２５ｍｍ、捲縮率１６．７％であった。 The obtained fiber had a single yarn fineness of 16.2 dtex, a strength of 2.7 cN / dtex, an elongation of 41%, a number of crimps of 12.5 / 25 mm, and a crimp rate of 16.7%.
この繊維を用い、実施例１と同様にして、実施例１と同様にして繊維ウェブを得た。得られた繊維ウェブの目付１０１２ｇ／ｍ２、厚さ５．０mmであった。繊維の特性および繊維ウェブの特性を表１に示す。 Using this fiber, a fiber web was obtained in the same manner as in Example 1 in the same manner as in Example 1. The obtained fiber web had a basis weight of 1012 g / m 2 and a thickness of 5.0 mm. The fiber properties and fiber web properties are shown in Table 1.
Claims (4)
2. The fiber web used for a paper machine felt according to claim 1, wherein fibers constituting the fiber web are intertwined and integrated by needle punching.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04507267A (en) * | 1988-11-28 | 1992-12-17 | オールバニー インターナショナル コーポレイション | paper machine felt |
| JPH05247877A (en) * | 1992-02-28 | 1993-09-24 | Daicel Huels Ltd | Felt for producing paper |
| JPH11116797A (en) * | 1997-10-20 | 1999-04-27 | Unitika Ltd | Polyamide resin composition and production thereof |
| JP2003003062A (en) * | 2001-06-25 | 2003-01-08 | Toray Ind Inc | Polyamide composition |
| JP2006257568A (en) * | 2005-03-16 | 2006-09-28 | Toray Monofilament Co Ltd | Polyamide staple for industrial fabric and the resultant industrial fabric |
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| JP2010018896A (en) * | 2008-07-08 | 2010-01-28 | Unitica Fibers Ltd | Crimped yarn of nylon 11 and method for producing the same |
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