JP2008163481A - Method for producing beaten polyketone staple fiber - Google Patents

Method for producing beaten polyketone staple fiber Download PDF

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JP2008163481A
JP2008163481A JP2006351686A JP2006351686A JP2008163481A JP 2008163481 A JP2008163481 A JP 2008163481A JP 2006351686 A JP2006351686 A JP 2006351686A JP 2006351686 A JP2006351686 A JP 2006351686A JP 2008163481 A JP2008163481 A JP 2008163481A
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polyketone
fiber
cut
beaten
fibers
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Tsuneo Igarashi
恒夫 五十嵐
Kiyoshi Miyaji
清 宮地
Takashi Yanai
孝 谷内
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Asahi Kasei Corp
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Asahi Kasei Fibers Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a beaten polyketone staple fiber, which is capable of producing a highly fibrillated beaten polyketone staple fiber in a short time. <P>SOLUTION: In the method, a polyketone fibers having ≥95 mol% of repeating units represented by formula (1), are cut to have a length of 1-20 mm and the cut fiber is beaten by a disk refiner to obtain a highly fibrillated beaten polyketone staple fiber, wherein the beating treatment is carried out with a plate having an edge having a width of 2-10 mm over the whole outer circumference. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明はポリケトン短繊維に関し、さらに詳しくは高度にフィブリル化したポリケトン叩解短繊維の製造方法に関する。   The present invention relates to polyketone short fibers, and more particularly to a method for producing highly fibrillated polyketone beaten short fibers.

近年、耐熱性や耐薬品性に優れた機能紙の需要が増大している。機能紙に要求されるスペックは厳しく、たとえば自動車用コンデンサーのセパレーター紙には、150℃以上の耐熱性、濃度30%以上、温度40℃以上での耐薬品性が要求されている。この様な機能紙にあっては、従来の木材パルプを原料とする紙では、実用に耐えられない為、新規な素材による紙が求められている。ポリケトン繊維は、耐熱性、耐薬品性に優れ且つ不純物(塩素イオン、金属イオン)の析出も少ないという特性を有するため、機能紙の素材として有望視され、実用化を目指して検討が進められている。機能紙は高い紙強度を要求される為、繊維を高度にフィブリル化させたパルプを原料とするが、ポリケトン繊維を短時間で高度にフィブリル化させることは難しく、種々の検討が為されている。たとえば特許文献1ではポリケトンカット繊維を、ビーターやリファイナーで予備叩解した後、高圧ホモジナイザーでさらに叩解処理することで、高度にフィブリル化したポリケトン叩解短繊維を得る方法が開示されている。しかしこの方法で得られたポリケトン叩解短繊維は繰り返しの叩解によって繊維長が著しく短かくなっているため、繊維同士の絡み合いが起こらず紙強度は低レベルのままである。   In recent years, there is an increasing demand for functional paper having excellent heat resistance and chemical resistance. Specs required for functional paper are strict. For example, separator paper for condensers for automobiles is required to have heat resistance of 150 ° C. or higher, concentration of 30% or higher, and chemical resistance at a temperature of 40 ° C. or higher. In such functional paper, paper made from conventional wood pulp cannot be put into practical use, and paper made of a new material is required. Polyketone fiber has excellent heat resistance and chemical resistance, and has a low precipitation of impurities (chlorine ions and metal ions). Therefore, it is considered promising as a functional paper material and is being studied for practical use. Yes. Since functional paper is required to have high paper strength, pulp made from highly fibrillated fibers is used as a raw material, but it is difficult to highly fibrillate polyketone fibers in a short time, and various studies have been made. . For example, Patent Document 1 discloses a method of obtaining a highly fibrillated polyketone beaten short fiber by pre-beating polyketone cut fiber with a beater or refiner and further beating with a high-pressure homogenizer. However, since the polyketone beaten short fiber obtained by this method has a remarkably shortened fiber length due to repeated beating, the fibers are not entangled and the paper strength remains at a low level.

国際公開2006−123456号パンフレットInternational Publication No. 2006-123456 Pamphlet

本発明は、高度にフィブリル化したポリケトン叩解短繊維の製造方法を提供するものである。   The present invention provides a method for producing highly fibrillated polyketone beaten short fibers.

上記課題を解決するため、鋭意検討した結果、ポリケトンカット繊維をデスクリファイナ−で叩解処理するに際して、特定の構造のプレートを使うことで、フィブリル化が促進し短時間で高度にフィブリル化したポリケトン短繊維が得られることを見出した。またこのポリケトン叩解短繊維は繊維長が長いという特徴を有するため、繊維同士の絡まり合いが多く、紙強度が向上することを見出し本発明を完成するに至った。すなわち本発明は、繰り返し単位の95モル%以上が、下記式(1)で示されるポリケトン繊維を長さ1〜20mmにカットし、このカット繊維をデスクリファイナーで叩解し高度にフィブリル化したポリケトン叩解短繊維を製造するに際して、外周全体に渡って幅2〜10mmの縁が設けられた構造のプレ−トで叩解処理することを特徴とするポリケトン短繊維の製造方法である。

Figure 2008163481
As a result of diligent studies to solve the above problems, when a polyketone-cut fiber is beaten with a describner, a specific structure plate is used to promote fibrillation and shorten the polyketone shortness that is highly fibrillated in a short time. It has been found that fibers can be obtained. Moreover, since this polyketone beating short fiber has a feature that the fiber length is long, it has been found that there are many entanglements between fibers and the paper strength is improved, and the present invention has been completed. That is, the present invention is a polyketone beaten in which 95 mol% or more of the repeating units are cut to a length of 1 to 20 mm from a polyketone fiber represented by the following formula (1), and the cut fiber is beaten with a describner to highly fibrillate When producing short fibers, a polyketone short fiber production method is characterized in that a beating treatment is performed with a plate having a structure in which an edge having a width of 2 to 10 mm is provided over the entire outer periphery.
Figure 2008163481

本発明は、耐熱性、耐薬品性に優れ、不純物(塩素イオン、金属イオン)の析出が少なく、高強度な機能紙を得るための原料として好適なポリケトン叩解短繊維の製造方法を提供する。   The present invention provides a method for producing polyketone beaten short fibers that are excellent in heat resistance and chemical resistance, have little precipitation of impurities (chlorine ions, metal ions), and are suitable as raw materials for obtaining high-strength functional paper.

本発明について以下に具体的に説明する。
本発明のポリケトン繊維を構成するポリケトンは、繰り返し単位の95モル%以上好ましくは98モル%以上特に99.6モル%以上が、上記式(1)で示されるものであり、5モル%未満の範囲で、上記式(1)以外の繰り返し単位、例えば、下記式(2)に示すもの等を含有していても良い。

Figure 2008163481
(但し、Rは、エチレン以外の炭素数1〜30の有機基であり、例えば、プロピレン、ブチレン、1−フェニルエチレン等であり、Rの水素原子の一部または全部が、ハロゲン基、エステル基、アミド基、水酸基、エーテル基で置換されていてもよい。もちろん、Rは二種以上であってもよく、例えば、プロピレンと1−フェニルエチレンが混在していてもよい。) The present invention will be specifically described below.
In the polyketone constituting the polyketone fiber of the present invention, 95 mol% or more, preferably 98 mol% or more, particularly 99.6 mol% or more of the repeating unit is represented by the above formula (1), and is less than 5 mol%. In the range, a repeating unit other than the above formula (1), for example, one represented by the following formula (2) may be contained.
Figure 2008163481
(However, R is an organic group having 1 to 30 carbon atoms other than ethylene, such as propylene, butylene, 1-phenylethylene, etc., and a part or all of the hydrogen atoms of R are a halogen group or an ester group. And may be substituted with an amide group, a hydroxyl group, or an ether group.Of course, R may be two or more, for example, propylene and 1-phenylethylene may be mixed.)

ポリケトンの固有粘度[η]は、好ましくは1dl/g以上、より好ましくは2dl/g以上、特に好ましくは4dl/g以上、20dl/g以下、15dl/g以下、10dl/g以下が好ましい。
尚、固有粘度[η]は次の定義式に基づいて求められる値である。

Figure 2008163481
(式中のt及びTは、それぞれヘキサフルオロイソプロパノール(セントラル硝子(株)社製)及び該ヘキサフルオロイソプロパノールに溶解したポリケトンの希釈溶液の25℃での粘度管の流過時間である。Cは、上記希釈溶液の濃度であり、ヘキサフルオロイソプロパノール100ml中のポリケトンの質量(g)である。)
ポリケトンには必要に応じて、酸化防止剤、ラジカル抑制剤、他のポリマー、艶消し剤、紫外線吸収剤、難燃剤、金属石鹸等の添加剤を含んでいてもよい。 The intrinsic viscosity [η] of the polyketone is preferably 1 dl / g or more, more preferably 2 dl / g or more, particularly preferably 4 dl / g or more, 20 dl / g or less, 15 dl / g or less, and 10 dl / g or less.
The intrinsic viscosity [η] is a value obtained based on the following definition formula.
Figure 2008163481
(T and T in the formula are respectively the flow time of the viscosity tube at 25 ° C. of hexafluoroisopropanol (manufactured by Central Glass Co., Ltd.) and a dilute solution of polyketone dissolved in the hexafluoroisopropanol. The concentration of the diluted solution is the mass (g) of polyketone in 100 ml of hexafluoroisopropanol.)
The polyketone may contain additives such as antioxidants, radical inhibitors, other polymers, matting agents, ultraviolet absorbers, flame retardants, and metal soaps as necessary.

次に、ポリケトン繊維の好ましい特性としては、引張強度は5cN/dtex以上、より好ましくは10cN/dtex以上、特に好ましくは15cN/dtex以上、30cN/dtex以下であり、引張伸度は3%以上、より好ましくは3.5%以上、特に好ましくは4%以上、8%以下、より好ましくは7%以下、特に好ましくは6%以下であり、引張弾性率は100cN/dtex以上、より好ましくは200cN/dtex以上、特に好ましくは300cN/dtex以上、1000cN/dtex以下である。
ポリケトン繊維の形態は、長さ方向に均一なものや太細のあるものでもよく、繊維の断面形状は、丸型、三角、L型、T型、Y型、W型、八葉型、扁平(扁平度1.3〜4程度のもので、W型、I型、ブーメラン型、波型、串団子型、まゆ型、直方体型等がある)、ドッグボーン型等の多角形型、多葉型、中空型や不定形なものでもよい。
好ましい単糸繊度は、0.01〜10dtex、より好ましくは0.1〜10dtex、特に好ましくは0.5〜5dtex、モノフィラメント糸の場合は、10〜100000dtexである。
Next, as preferable characteristics of the polyketone fiber, the tensile strength is 5 cN / dtex or more, more preferably 10 cN / dtex or more, particularly preferably 15 cN / dtex or more, 30 cN / dtex or less, and the tensile elongation is 3% or more, More preferably, it is 3.5% or more, particularly preferably 4% or more, 8% or less, more preferably 7% or less, particularly preferably 6% or less, and the tensile elastic modulus is 100 cN / dtex or more, more preferably 200 cN / It is not less than dtex, particularly preferably not less than 300 cN / dtex and not more than 1000 cN / dtex.
The shape of the polyketone fiber may be uniform or thick in the length direction, and the cross-sectional shape of the fiber may be round, triangular, L-shaped, T-shaped, Y-shaped, W-shaped, Yaba-shaped, flat (With flatness of about 1.3-4, W type, I type, boomerang type, wave type, skewer type, eyebrows type, rectangular parallelepiped type, etc.), polygonal type such as dogbone type, multileaf It may be a mold, a hollow mold, or an irregular shape.
The preferred single yarn fineness is 0.01 to 10 dtex, more preferably 0.1 to 10 dtex, particularly preferably 0.5 to 5 dtex, and in the case of monofilament yarn, 10 to 100,000 dtex.

本発明のポリケトン叩解短繊維は前述したポリケトン繊維を1〜20mmに裁断したカット繊維をデスクリファイナー叩解処理して製造する。 裁断機は一般的なギロチンカッター、あるいはロータリーカッターで良い。カット繊維の長さは特に限定されないが1〜20mmが好ましく、より好ましくは、1.5〜10mm、特に好ましくは2〜8mmである。カット繊維長が1mm未満の場合にはポリケトン叩解短繊維の長さが短かくなるため繊維同士の絡み合いが不足し強度が発現されない。カット繊維長が20mmより大きい場合には、ポリケトン叩解短繊維の先端が丸まって毛玉状になり、品位不良、厚み斑の大きい紙になってしまう。
カット繊維は水に分散させスラリーの状態でデスクリファイナーに供給する。カット繊維濃度は0.2〜10%、好ましくは0.3〜8%、さらに好ましくは0.5〜5%である。カット繊維の濃度が0.2%未満の場合、水が多すぎて、カット繊維同士、あるいはカット繊維と金属刃の擦過が起こらないためフィブリル化が進まない。カット繊維濃度が10%を超えると、カット繊維同士、カット繊維と金属刃の擦過力が強くなりすぎて、ポリケトン叩解短繊維長が著しく短くなるため好ましくない。
The polyketone beating short fiber of the present invention is produced by beating a cut fiber obtained by cutting the above-described polyketone fiber into 1 to 20 mm. The cutting machine may be a general guillotine cutter or a rotary cutter. Although the length of a cut fiber is not specifically limited, 1-20 mm is preferable, More preferably, it is 1.5-10 mm, Most preferably, it is 2-8 mm. When the cut fiber length is less than 1 mm, the length of the polyketone beating short fiber becomes short, so that the entanglement between the fibers is insufficient and the strength is not expressed. When the cut fiber length is larger than 20 mm, the end of the polyketone beating short fiber is rounded to become a hairball shape, resulting in a paper with poor quality and large thickness spots.
The cut fiber is dispersed in water and supplied to the describner in the form of a slurry. The cut fiber concentration is 0.2 to 10%, preferably 0.3 to 8%, more preferably 0.5 to 5%. When the concentration of the cut fiber is less than 0.2%, there is too much water, and the cut fibers or the cut fibers and the metal blade do not rub, so that the fibrillation does not proceed. If the cut fiber concentration exceeds 10%, the scuffing force between the cut fibers, the cut fiber and the metal blade becomes too strong, and the polyketone beating short fiber length is remarkably shortened.

本発明のポリケトン叩解短繊維は特定の構造のプレートを取り付けたデスクリファイナーで叩解処理することを特徴とする。この特定の構造のプレート以外では高度にフィブリル化し且つ繊維長が大きいポリケトン叩解短繊維を得ることは出来ない。また他の叩解機、例えばビーターを使った場合には高度にフィブリル化させる事が不可能であり、さらに高圧ホモジナイザーを使った場合には高度にフィブリル化させることは可能であるが、繊維長が著しく短くなってしまうため紙強度を発現させることは出来ない。
デスクリファイナーのプレートは外周全体に渡って幅2〜10mmの縁を設けた構造であることが重要である。この縁があるためにスラリーはせき止められ滞留する。この滞留している間にカット繊維が金属刃によって擦過されフィブリル化が進行する。またカット繊維同士がぶつかりあうことでさらにフィブリル化が促進する。縁が無い場合にはカット繊維のほとんどは素通りしてしまうため、フィブリル化が進まない。縁の幅は2〜10mmであり、好ましくは3〜8mm、さらに好ましくは4〜6mmである。
The polyketone beating short fiber of the present invention is characterized in that it is beaten with a describner to which a plate having a specific structure is attached. Other than the plate having this specific structure, it is impossible to obtain polyketone beaten short fibers that are highly fibrillated and have a large fiber length. In addition, when using other beaters such as a beater, it is impossible to highly fibrillate, and when using a high-pressure homogenizer, it can be highly fibrillated, but the fiber length is high. The paper strength cannot be expressed because it becomes extremely short.
It is important that the plate of the desk refiner has a structure in which an edge having a width of 2 to 10 mm is provided over the entire outer periphery. Because of this edge, the slurry is dammed and stays. During this stay, the cut fiber is abraded by the metal blade and fibrillation proceeds. Further, fibrillation is further promoted by the cut fibers colliding with each other. When there is no edge, most of the cut fibers pass through, so fibrillation does not progress. The width of the edge is 2 to 10 mm, preferably 3 to 8 mm, and more preferably 4 to 6 mm.

図を用いてさらに説明する。図−1は外周全体に渡って縁が設けられた構造のプレートである。1)が外周縁、2)はカット繊維を叩解するための金属刃、3)は溝(スラリーの流路)である。図−2は木材パルプの叩解処理に使われる一般的な縁が設けられていない構造のプレートである。プレートに取り付けられる金属刃の刃幅は2〜5mmが好ましくさらに好ましくは3〜4mmである。刃幅が2mmよりも小さいと擦過力が小さくなりフィブリル化が進まない。刃幅が5mmを超えるとカット繊維が過大な擦過力を受け繊維長が短くなる。プレートに取り付けられる金属刃の枚数は、周方向等間隔に、外周長あたり0.10〜0.20枚であることが好ましい。外周長あたり0.1〜0.20枚とは例えば外径が305cmの場合、305×3.14×(0.10〜0.20)であるため、96枚〜190枚の刃を設置する事を意味する。幅2〜5mmの金属刃を周方向等間隔に外周長あたり0.10〜0.20枚設けることによって、カット繊維は適度な擦過力を受けフィブリル化が進行する。枚数が0.20より多いと摩過力が過大となり繊維長が短くなる。0.10より少ないと刃が粗くなってしまいカット繊維は素通りしフィブリル化が進まない。   This will be further described with reference to the drawings. FIG. 1 shows a plate having a structure in which an edge is provided over the entire outer periphery. 1) is the outer periphery, 2) is a metal blade for beating the cut fiber, and 3) is a groove (slurry flow path). Fig. 2 shows a plate with a structure that is not provided with a general edge used for beating wood pulp. The blade width of the metal blade attached to the plate is preferably 2 to 5 mm, more preferably 3 to 4 mm. When the blade width is smaller than 2 mm, the abrasion force becomes small and fibrillation does not proceed. When the blade width exceeds 5 mm, the cut fiber receives an excessive rubbing force and the fiber length is shortened. The number of metal blades attached to the plate is preferably 0.10 to 0.20 per outer peripheral length at equal intervals in the circumferential direction. For example, when the outer diameter is 305 cm, 0.1 to 0.20 per outer circumferential length is 305 × 3.14 × (0.10 to 0.20), so 96 to 190 blades are installed. Means things. By providing 0.10 to 0.20 metal blades having a width of 2 to 5 mm per circumferential length at equal intervals in the circumferential direction, the cut fibers receive an appropriate rubbing force and fibrillation proceeds. When the number is more than 0.20, the abrasion force becomes excessive and the fiber length is shortened. If it is less than 0.10, the blade becomes rough and the cut fibers pass through and fibrillation does not proceed.

金属刃は5〜30°傾斜した状態で取り付けられていることが好ましい。5〜30°傾斜していることでカット繊維は素通りすることなく刃に接触し擦過力を受けフィブリル化が促進する。傾斜角度は5〜30°であり好ましくは8〜25°さらに好ましくは10〜20°である。傾斜角度が5°未満の場合にはカット繊維の素通りが多くなりフィブリル化が進まない。30°を超えるとカット繊維が刃にまともにぶつかるためカット繊維の切断が進行し繊維長が短くなってしまう。
本発明の叩解処理はシングルデスクリファイナーで行っても良いし、ダブルデスクリファイナーで行っても良い。生産量などを勘案し決定すれば良い。
It is preferable that the metal blade is attached in an inclined state of 5 to 30 °. By being inclined at 5 to 30 °, the cut fiber does not pass through but contacts the blade and receives a rubbing force to promote fibrillation. The inclination angle is 5 to 30 °, preferably 8 to 25 °, more preferably 10 to 20 °. When the inclination angle is less than 5 °, the cut fiber passes through more and fibrillation does not proceed. When the angle exceeds 30 °, the cut fiber collides with the blade, and the cut of the cut fiber proceeds and the fiber length becomes short.
The beating process of the present invention may be performed by a single desk refiner or a double desk refiner. It may be determined in consideration of the production volume.

ポリケトン叩解短繊維の物性は比表面積値と平均繊維長で表すことが出来る。比表面積値はマウンテック(株)製の比表面積計を使いBHT標準法にて測定した。本発明方法で得られるポリケトン叩解短繊維の比表面積値は4〜10m2/gである。比表面積値が4m2/g未満の場合には繊維同士の絡み合いが不足するため紙強度が向上しない。比表面積値が10m2/gを超えると繊維長が短くなってしまうため紙強度が向上しない。好ましい範囲は5〜8m2/gである。繊維長はネスレオートメーション(株)製 カヤーニファイバーアナライザーFS200を使い、ポリケトン短繊維10000本の繊維長をレーザー光により計測し所定の計算式にしたがって平均繊維長(LW)を算出した。平均繊維長(LW)は0.3〜4mmであり、好ましくは0.4〜3.5mm、もっとも好ましくは0.5〜3mmが良い。平均繊維長が0.3mm未満の場合には、紙強度が発現されない。平均繊維長が4mmを超える場合にはフィブリルの先端が丸まって毛玉が出来、品位不良となるため好ましくない。
ポリケトン叩解短繊維は湿式抄紙法によって抄紙しポリケトン繊維紙を得る。この後、ポリケトン繊維紙は自然乾燥した後、ホットプレスにて105℃×5分間の仕上げ処理を行ない製品とする。
The physical properties of polyketone beaten short fibers can be represented by specific surface area values and average fiber lengths. The specific surface area value was measured by a BHT standard method using a specific surface area meter manufactured by Mountec Co., Ltd. The specific surface area value of the polyketone beaten short fiber obtained by the method of the present invention is 4 to 10 m 2 / g. When the specific surface area value is less than 4 m 2 / g, the paper strength is not improved because the entanglement between the fibers is insufficient. When the specific surface area value exceeds 10 m 2 / g, the fiber length is shortened and the paper strength is not improved. A preferred range is 5 to 8 m 2 / g. The fiber length was measured using a Kayani fiber analyzer FS200 manufactured by Nestle Automation Co., Ltd., and the fiber length of 10,000 polyketone short fibers was measured with a laser beam, and the average fiber length (LW) was calculated according to a predetermined calculation formula. The average fiber length (LW) is 0.3 to 4 mm, preferably 0.4 to 3.5 mm, and most preferably 0.5 to 3 mm. When the average fiber length is less than 0.3 mm, the paper strength is not expressed. When the average fiber length exceeds 4 mm, the tip of the fibril is rounded to form a hairball, which is not preferable.
Polyketone beaten short fibers are made by wet paper making to obtain polyketone fiber paper. Thereafter, the polyketone fiber paper is naturally dried and then subjected to a finishing treatment at 105 ° C. for 5 minutes with a hot press to obtain a product.

本発明を実施例に基づいて説明する。
本発明における測定方法及び評価方法は以下の通りである。
(1)比表面積値
マウンテック(株)製の比表面積計Macsorb HM model−1201を使いBHT標準法にて測定した。
(2)平均繊維長(LW)
ネスレオートメーション(株)製 カヤーニファイバーアナライザーFS200を使い、ポリケトン短繊維10000本の繊維長をレーザー光により計測し、所定の計算式にて加重平均繊維長(LW)を算出した。
The present invention will be described based on examples.
The measurement method and evaluation method in the present invention are as follows.
(1) Specific surface area value It measured with the BHT standard method using the specific surface area meter Macsorb HM model-1201 by the mount tech Co., Ltd.
(2) Average fiber length (LW)
Using a Kayani fiber analyzer FS200 manufactured by Nestle Automation Co., Ltd., the fiber length of 10,000 polyketone short fibers was measured with a laser beam, and the weighted average fiber length (LW) was calculated by a predetermined calculation formula.

[実施例1]
1670dtex/1250fのポリケトン繊維(旭化成せんい(株)社製;商標サイバロン;引張強度18cN/dtex、引張伸度5%、引張弾性率350cN/dtex)をギロチンカッターにて裁断し長さ5mmのカット繊維を得た。このカット繊維1kgを100リッターの水に入れて繊維濃度1%のスラリーを作成した。このスラリーを熊谷理機株式会社製シングルデスクリファイナー(型式KRK型高濃度リファイナー、プレート直径=305mm)を使って、プレート回転数=1750rpm、プレートクリアランス=0.05mm、流量=30L/minで60分間、叩解処理を行った。このときプレートは、外周縁=有り、外周縁幅=5mm、金属刃幅=3mm、金属刃本数=150本(外周長あたり0.15)金属刃傾斜角度=15°の構造のプレートを使用した。得られたポリケトン短繊維の物性を表1に示す。高度にフィブリル化しており且つ繊維長も長くポリケトン繊維紙用原料として好適なものであった。
[Example 1]
1670 dtex / 1250f polyketone fiber (manufactured by Asahi Kasei Fibers Co., Ltd .; trademark Cyvalon; tensile strength 18 cN / dtex, tensile elongation 5%, tensile elastic modulus 350 cN / dtex) cut with a guillotine cutter and cut into 5 mm length Got. 1 kg of this cut fiber was put into 100 liters of water to prepare a slurry having a fiber concentration of 1%. Using this slurry, a single desk refiner (model KRK type high concentration refiner, plate diameter = 305 mm) manufactured by Kumagai Riki Co., Ltd., plate rotation speed = 1750 rpm, plate clearance = 0.05 mm, flow rate = 30 L / min for 60 minutes. The beating process was performed. At this time, a plate having a structure in which the outer peripheral edge is present, the outer peripheral edge width is 5 mm, the metal blade width is 3 mm, the number of metal blades is 150 (0.15 per outer peripheral length), and the metal blade is inclined at 15 ° is used. . The physical properties of the obtained polyketone short fibers are shown in Table 1. It was highly fibrillated and had a long fiber length and was suitable as a raw material for polyketone fiber paper.

[比較例1]
1670dtex/1250fのポリケトン繊維(旭化成せんい(株)社製;商標サイバロン;引張強度18cN/dtex、引張伸度5%、引張弾性率350cN/dtex)をギロチンカッターにて裁断し長さ5mmのカット繊維を得た。このカット繊維1kgを100リッターの水に入れて繊維濃度1%のスラリーを作成した。このスラリーを熊谷理機株式会社製シングルデスクリファイナー(型式KRK型高濃度リファイナー、プレート直径=305mm)を使って、プレート回転数=1750rpm、プレートクリアランス=0.05mm、流量=30L/minで60分間、叩解処理を行った。このときプレートは、外周縁が無い事以外は実施例1と同じ刃幅、刃本数、刃傾斜角度のものを使用した。得られたポリケトン叩解短繊維の物性を表1に示す。フィブリル化が進んでおらず、比表面積値は低レベルであった。
[Comparative Example 1]
1670 dtex / 1250f polyketone fiber (manufactured by Asahi Kasei Fibers Co., Ltd .; trademark Cyvalon; tensile strength 18 cN / dtex, tensile elongation 5%, tensile elastic modulus 350 cN / dtex) cut with a guillotine cutter and cut into 5 mm length Got. 1 kg of this cut fiber was put into 100 liters of water to prepare a slurry having a fiber concentration of 1%. Using this slurry, a single desk refiner (model KRK type high concentration refiner, plate diameter = 305 mm) manufactured by Kumagai Riki Co., Ltd., plate rotation speed = 1750 rpm, plate clearance = 0.05 mm, flow rate = 30 L / min for 60 minutes. The beating process was performed. At this time, a plate having the same blade width, number of blades, and blade inclination angle as in Example 1 was used except that there was no outer peripheral edge. Table 1 shows the physical properties of the obtained polyketone beaten short fibers. The fibrillation was not progressing and the specific surface area value was at a low level.

[比較例2]
1670dtex/1250fのポリケトン繊維(旭化成せんい(株)社製;商標サイバロン;引張強度18cN/dtex、引張伸度5%、引張弾性率350cN/dtex)をギロチンカッターにて裁断し長さ5mmのカット繊維を得た。このカット繊維1kgを100リッターの水に入れて繊維濃度1%のスラリーを作成した。このスラリーを熊谷理機株式会社製シングルデスクリファイナー(型式KRK型高濃度リファイナー、プレート直径=305mm)を使って、プレート回転数=1750rpm、プレートクリアランス=0.05mm、流量=30L/minで180分間、叩解処理を行った。このときプレートは、外周縁が無い事以外は、実施例1と同じ刃幅、刃本数、刃傾斜角度のものを使用した。得られたポリケトン叩解短繊維の物性を表1に示す。フィブリル化は進んでいるが、平均繊維長が著しく短くなっており強度が要求される紙用パルプとしては不適なものであった。
[Comparative Example 2]
1670 dtex / 1250f polyketone fiber (manufactured by Asahi Kasei Fibers Co., Ltd .; trademark Cyvalon; tensile strength 18 cN / dtex, tensile elongation 5%, tensile elastic modulus 350 cN / dtex) is cut with a guillotine cutter and is a cut fiber having a length of 5 mm Got. 1 kg of this cut fiber was put into 100 liters of water to prepare a slurry having a fiber concentration of 1%. This slurry was used for 180 minutes at a plate rotation speed = 1750 rpm, a plate clearance = 0.05 mm, and a flow rate = 30 L / min using a single desk refiner (model KRK type high concentration refiner, plate diameter = 305 mm) manufactured by Kumagai Riki Co., Ltd. The beating process was performed. At this time, a plate having the same blade width, number of blades, and blade inclination angle as in Example 1 was used except that there was no outer peripheral edge. Table 1 shows the physical properties of the obtained polyketone beaten short fibers. Although fibrillation is progressing, the average fiber length is remarkably shortened and it is not suitable as a paper pulp requiring strength.

Figure 2008163481
Figure 2008163481

本発明は、高度にフィブリル化したポリケトン叩解短繊維を短時間で製造することが可能なポリケトン叩解短繊維の製造方法を提供するものである。   The present invention provides a method for producing a polyketone beaten short fiber capable of producing a highly fibrillated polyketone beaten short fiber in a short time.

図−1は外周全体に渡って外周縁が設けられた構造のプレートである。FIG. 1 shows a plate having a structure in which an outer peripheral edge is provided over the entire outer periphery. 図−2は木材パルプの叩解処理に使われる一般的な外周縁が設けられていない構造のプレートである。FIG. 2 shows a plate having a structure that is not provided with a general outer peripheral edge used for beating processing of wood pulp.

符号の説明Explanation of symbols

1)外周縁
2)金属刃
3)溝
1) outer periphery 2) metal blade 3) groove

Claims (1)

繰り返し単位の95モル%以上が、下記式(1)で示されるポリケトン繊維を長さ1〜20mmにカットし、このカット繊維をデスクリファイナーで叩解し高度にフィブリル化したポリケトン叩解短繊維を製造するに際して、外周全体に渡って幅2〜10mmの縁を設けた構造のプレートで叩解処理することを特徴とするポリケトン叩解短繊維の製造方法。
Figure 2008163481
95 mol% or more of repeating units cut polyketone fibers represented by the following formula (1) to a length of 1 to 20 mm, and beat these cut fibers with a describner to produce highly fibrillated polyketone beaten short fibers. In this case, a polyketone beaten short fiber manufacturing method, wherein a beating process is performed with a plate having a structure having an edge having a width of 2 to 10 mm over the entire outer periphery.
Figure 2008163481
JP2006351686A 2006-12-27 2006-12-27 Method for producing beaten polyketone staple fiber Pending JP2008163481A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012099091A1 (en) * 2011-01-20 2012-07-26 日本製紙株式会社 Pulp preparation method
CN103437233A (en) * 2013-09-11 2013-12-11 顾德芹 Polyacrylonitrile pulp type fibers as well as preparation method thereof
WO2014091890A1 (en) * 2012-12-13 2014-06-19 昭和電工株式会社 Pretreatment method for cellulose-containing biomass, production method for saccharifying biomass composition, and sugar production method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5530424A (en) * 1978-08-22 1980-03-04 Oji Paper Co Refiner element
JPS6124495U (en) * 1984-07-13 1986-02-13 三菱重工業株式会社 Beating blade element
JPH0197294A (en) * 1987-10-06 1989-04-14 Piran Mirton Refiner for wood pulp
JP2001207335A (en) * 2000-01-27 2001-08-03 Asahi Kasei Corp Fibrillar material and method for producing the same
WO2006077789A1 (en) * 2005-01-18 2006-07-27 Asahi Kasei Chemicals Corporation Polyketone fiber paper, polyketone fiber paper core material for printed wiring board and printed wiring board
JP2008144290A (en) * 2006-12-07 2008-06-26 Asahi Kasei Fibers Corp Polyketone paper and separator

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5530424A (en) * 1978-08-22 1980-03-04 Oji Paper Co Refiner element
JPS6124495U (en) * 1984-07-13 1986-02-13 三菱重工業株式会社 Beating blade element
JPH0197294A (en) * 1987-10-06 1989-04-14 Piran Mirton Refiner for wood pulp
JP2001207335A (en) * 2000-01-27 2001-08-03 Asahi Kasei Corp Fibrillar material and method for producing the same
WO2006077789A1 (en) * 2005-01-18 2006-07-27 Asahi Kasei Chemicals Corporation Polyketone fiber paper, polyketone fiber paper core material for printed wiring board and printed wiring board
JP2008144290A (en) * 2006-12-07 2008-06-26 Asahi Kasei Fibers Corp Polyketone paper and separator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012099091A1 (en) * 2011-01-20 2012-07-26 日本製紙株式会社 Pulp preparation method
JP2012149362A (en) * 2011-01-20 2012-08-09 Nippon Paper Industries Co Ltd Method for preparing pulp
WO2014091890A1 (en) * 2012-12-13 2014-06-19 昭和電工株式会社 Pretreatment method for cellulose-containing biomass, production method for saccharifying biomass composition, and sugar production method
CN103437233A (en) * 2013-09-11 2013-12-11 顾德芹 Polyacrylonitrile pulp type fibers as well as preparation method thereof

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