JP2007532792A - Paper manufacturing method - Google Patents

Paper manufacturing method Download PDF

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JP2007532792A
JP2007532792A JP2007507808A JP2007507808A JP2007532792A JP 2007532792 A JP2007532792 A JP 2007532792A JP 2007507808 A JP2007507808 A JP 2007507808A JP 2007507808 A JP2007507808 A JP 2007507808A JP 2007532792 A JP2007532792 A JP 2007532792A
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polymer
fibers
fiber
web
formation
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キヴィランタ，アリ
ヴェルカサロ，ラウリ
ランタネン，ミナ
ヒルヴォネン，キルシ
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エム−レアル オーワイジェイ
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06—Paper forming aids
    • D21H21/10—Retention agents or drainage improvers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/25—Cellulose
    • D21H17/26—Ethers thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/31—Gums
    • D21H17/32—Guar or other polygalactomannan gum
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
    • D21H17/375—Poly(meth)acrylamide
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
    • D21H17/42—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups anionic
    • D21H17/43—Carboxyl groups or derivatives thereof

Abstract

本発明は、木質繊維および化学繊維を含む紙匹を製造する方法に関する。ポリマが木質繊維と化学繊維とを含む繊維懸濁液に対して、添加されて、紙匹形成を改善し、抄紙機のワイヤ部における水の抜けを鈍化させる。  The present invention relates to a method for producing a web comprising wood fibers and chemical fibers. A polymer is added to the fiber suspension containing wood fibers and chemical fibers to improve the web formation and to blunt out water in the wire section of the paper machine.

Description

発明の詳細な説明Detailed Description of the Invention

本発明は、木質繊維および化学繊維を含む紙匹を製造する方法に関する。   The present invention relates to a method for producing a web comprising wood fibers and chemical fibers.

木質繊維から作られる紙匹の強度、および／または寸法安定性を向上するために、化学繊維、すなわち合成繊維または再生繊維と、木質繊維とを混合することが可能である。使用される木質繊維は、１．２ｍｍの平均繊維長を有するが、使用される化学繊維の繊維長は、通常５ｍｍ程度である。繊維の製造において、異なる繊維長さ、また、さまざまなその他の繊維特性によって、問題が生じる。１つの問題は、ヘッドボックス中の繊維の凝集であり、紙匹の不充分な形成となる。長い繊維は互いに付着し、それらは長い繊維の繊維束において、短い繊維も捕らえる。   In order to improve the strength and / or dimensional stability of a web made of wood fibers, it is possible to mix the wood fibers with chemical fibers, ie synthetic or regenerated fibers. The wood fiber used has an average fiber length of 1.2 mm, but the fiber length of the chemical fiber used is usually about 5 mm. In the production of fibers, problems arise due to different fiber lengths and various other fiber properties. One problem is agglomeration of fibers in the headbox, resulting in poor formation of the web. Long fibers adhere to each other and they also catch short fibers in a long fiber bundle.

凝集傾向は、パルプの濃度を下げることによって軽減できるが、その結果、製造パラメータは、従来の機械で製造が不可能なほどになり得る、および／または、機械の速度が下がるに違いないので、製造は採算が取れない。多層紙を製造しようとする試みも行われてきており、そこでは希釈されたパルプを相対的に高速で流すことができる。さらに、類似の紙質は、不織布用機械で、湿潤紙匹形成によって製造されるように移行した。要約すれば、抄紙機において化学繊維を含む紙匹を流すことは問題であり、この問題を解決しようとする試みが約３０年間行われてきた。   The tendency to agglomerate can be mitigated by lowering the pulp concentration, so that the production parameters can be made impossible to manufacture with conventional machines and / or the machine speed must be reduced, so Manufacturing is not profitable. Attempts have also been made to produce multilayer paper, where diluted pulp can be run at a relatively high rate. In addition, similar paper quality was transferred to non-woven machines to be produced by wet web formation. In summary, running paper webs containing chemical fibers in a paper machine is a problem, and attempts to solve this problem have been made for about 30 years.

本発明に従う方法は、ポリマが木質繊維および化学繊維を含む繊維懸濁液に添加され、紙匹形成を改善し、抄紙機のワイヤ部において、水の抜けを鈍化させることを特徴とする。   The process according to the invention is characterized in that the polymer is added to a fiber suspension comprising wood fibers and chemical fibers to improve the web formation and to blunt out water in the wire section of the paper machine.

上述の問題は、パルプに混合されたポリマを用いて、紙匹形成を改善し、抄紙機のワイヤ部において水の抜けを鈍化させることによって、軽減または解消できる。パルプの濃度を下げる必要がなく、スライスの大きさがパルプをワイヤに投与するのに充分なので、紙匹は通常の抄紙機を用いて製造できる。一般的に、濃度は約１％で、通常の運転速度は８００ｍ／分である。   The above problems can be reduced or eliminated by using a polymer mixed in the pulp to improve the web formation and blunt the drainage of water in the wire section of the paper machine. Since there is no need to reduce the concentration of the pulp and the slice size is sufficient to administer the pulp to the wire, the web can be produced using a normal paper machine. In general, the concentration is about 1% and the normal operating speed is 800 m / min.

紙匹形成における改善は、紙匹の滑らかさによって示される。ポリマが水の抜けを鈍化させるので、機械的手段は、紙匹において繊維の配置に影響を与えるように使用できる。ヘッドボックスの排出とワイヤとの間の速度差によって、繊維は低い流動抵抗およびせん断力を有する位置に移動する傾向があるので、機械的手段は、たとえば脱水中の紙匹形成の本質的な改善を含む。その他の可能な改善機構は、ワイヤの振動、および／またはパルプ層の表面の振動によって発生するせん断力を含む。さらに、機械的手段は、フォーミングワイヤの下のサクションボックスの効果を含む、あるいは、繊維束の形成を防止するために、フォーミングワイヤの上面のロールを使用することが可能である。   The improvement in web formation is indicated by the smoothness of the web. Mechanical means can be used to affect the fiber placement in the web as the polymer blunts water drainage. Mechanical means are essential improvements in web formation during dehydration, for example, because the speed difference between the headbox ejection and the wire tends to move the fiber to a position with low flow resistance and shear force. including. Other possible improvement mechanisms include shear forces generated by wire vibrations and / or surface vibrations of the pulp layer. Furthermore, the mechanical means can include the effect of a suction box under the forming wire or use a roll on the top surface of the forming wire to prevent the formation of fiber bundles.

本発明に従う方法で使用されるポリマは、高分子量を有し、相対的に分岐していない。ポリマは好ましくは陰イオンである。   The polymers used in the process according to the invention have a high molecular weight and are not relatively branched. The polymer is preferably an anion.

使用される適切なポリマは、たとえば、陰イオン性ポリアクリルアミド、ＣＭＣ、グアーガム、またはそれらの混合物である。目的に適した陰イオン性ポリアクリルアミドは、少なくとも１０，０００，０００ｇ／ｍｏｌの分子量、および約３０％の電荷密度を有し、繊維トン当たり０．２〜２ｋｇ投与される。ＣＭＣは少なくとも７５０，０００ｇ／ｍｏｌの分子量を有し、繊維トン当たり２〜８ｋｇ投与される。製造工程で、ポリマは繊維にほとんど付着せず、使用に戻されるので、ポリマの投与量を減らすことができる。   Suitable polymers used are, for example, anionic polyacrylamide, CMC, guar gum, or mixtures thereof. Anionic polyacrylamide suitable for the purpose has a molecular weight of at least 10,000,000 g / mol and a charge density of about 30% and is dosed between 0.2 and 2 kg per ton of fiber. CMC has a molecular weight of at least 750,000 g / mol and is administered 2-8 kg per tonne fiber. In the manufacturing process, the polymer hardly adheres to the fiber and is returned to use, so the polymer dosage can be reduced.

該方法が機能するｐＨ値は、中性またはアルカリ性である。繊維懸濁液のｐＨは、工程で作用するポリマのために、少なくとも６．５に調節される。一方、ポリマはｐＨが高すぎても作用しない。ポリマは機械スクリーンの前、または機械スクリーンの後の、パルプ混合タンクに添加される。   The pH value at which the method works is neutral or alkaline. The pH of the fiber suspension is adjusted to at least 6.5 for the polymer working in the process. On the other hand, polymers do not work if the pH is too high. The polymer is added to the pulp mixing tank before the machine screen or after the machine screen.

本発明に従う方法は、主に壁紙の製造において用いられ、いわゆる壁に貼る壁紙（接着剤が、壁紙が貼られる壁に塗られ、乾燥壁紙が接着剤に置かれる）に関連する。壁紙において、５ｍｍの一般的な繊維長さを有する化学繊維の含有量は、たいてい１０重量％であるが、本発明に従う方法によって作られる壁紙において、含有量は１５〜５０重量％であってもよい。通常は、使用される化学繊維はポリエステルである。なぜなら、ポリエステルはパルプ繊維で製造するために適した密度を有するからである。壁紙の製造において、紙は従来の抄紙機概念に従って作ることができるので、該方法は経済的である。   The method according to the invention is mainly used in the manufacture of wallpaper and relates to so-called wall-pasting wallpaper (adhesive is applied to the wall on which the wallpaper is applied and dry wallpaper is placed on the adhesive). In wallpaper, the content of chemical fibers with a typical fiber length of 5 mm is usually 10% by weight, but in wallpaper made by the method according to the invention the content can be 15-50% by weight. Good. Usually, the chemical fiber used is polyester. This is because polyester has a density suitable for making with pulp fibers. In the production of wallpaper, the method is economical because the paper can be made according to conventional paper machine concepts.

壁紙に加えて、本発明に従う方法は、湿潤紙匹形成技術によって現在作られている、濾紙、掃除機の集塵袋、湿潤強度タオル、シーツ、およびリンネル紙などの製品にも適用することができる。   In addition to wallpaper, the method according to the present invention may also be applied to products such as filter paper, vacuum cleaner dust bags, wet strength towels, sheets, and linen paper currently made by wet paper web forming technology. it can.

以下において、本発明が実施例および図を参照して、述べられるであろう。図はヘッドボックスにおける濃度の関数として形成（Ａｍｂｅｒｔｅｃ形成）を説明している。   In the following, the present invention will be described with reference to examples and figures. The figure illustrates the formation (Ambertec formation) as a function of density in the headbox.

実験は、形成へのポリアクリルアミドおよびＣＭＣの影響を種々の濃度で見出すために行われた。参照は、形成を改善し、水の抜けを鈍化させるためにポリマが添加されない試料であった。   Experiments were performed to find the effect of polyacrylamide and CMC on formation at various concentrations. The reference was a sample to which no polymer was added to improve formation and blunt water drainage.

陰イオン性ポリアクリルアミドの投与量は繊維トン当たり１〜２ｋｇであった。ＣＭＣの投与量は繊維トン当たり５〜１０ｋｇであった。アクリルアミドに関する繊維懸濁液のｐＨは、７〜８であった。ＣＭＣに関する繊維懸濁液のｐＨは、７〜８であった。   The dose of anionic polyacrylamide was 1-2 kg per ton fiber. The dose of CMC was 5-10 kg per ton fiber. The pH of the fiber suspension for acrylamide was 7-8. The pH of the fiber suspension for CMC was 7-8.

本発明は、上記の記載に限定されないが、請求項の範囲内で変更してもよい。   The invention is not limited to the above description but may vary within the scope of the claims.

ヘッドボックスにおける濃度の関数として形成（Ａｍｂｅｒｔｅｃ形成）を説明する図である。It is a figure explaining formation (Ambertec formation) as a function of the density in a head box.

Claims (6)

木質繊維と化学繊維とを含む紙匹の製造のための方法において、木質繊維と化学繊維とを含む繊維懸濁液に対して、ポリマが添加されて、紙匹形成を改善し、抄紙機のワイヤ部における水の抜けを鈍化させることを特徴とする方法。   In a method for producing a paper web comprising wood fibers and chemical fibers, a polymer is added to the fiber suspension comprising wood fibers and chemical fibers to improve the web stock formation and A method characterized by blunting the drainage of water in the wire portion. ポリマ、が少なくとも１０，０００，０００ｇ／ｍｏｌの分子量を有する陰イオン性ポリアクリルアミドであることを特徴とする、請求項１に記載の方法。   The process according to claim 1, characterized in that the polymer is an anionic polyacrylamide having a molecular weight of at least 10,000,000 g / mol. ポリマが、少なくとも７５０，０００ｇ／ｍｏｌの分子量を有するカルボキシメチルセルロースであることを特徴とする、請求項１に記載の方法。   The process according to claim 1, characterized in that the polymer is carboxymethylcellulose having a molecular weight of at least 750,000 g / mol. ポリマがグアーガムであることを特徴とする、請求項１に記載の方法。   The method of claim 1, wherein the polymer is guar gum. ポリマは、機械スクリーンの前、または機械スクリーンの後の、パルプ混合タンクに添加されることを特徴とする、請求項１に記載の方法。   The method of claim 1, wherein the polymer is added to the pulp mixing tank before the mechanical screen or after the mechanical screen. 繊維懸濁液のｐＨが、少なくとも６．５に調節されることを特徴とする、請求項１に記載の方法。   The process according to claim 1, characterized in that the pH of the fiber suspension is adjusted to at least 6.5.
JP2007507808A 2004-04-14 2005-04-14 Paper manufacturing method Pending JP2007532792A (en)

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FI20045132A FI20045132A (en) 2004-04-14 2004-04-14 Paper manufacturing process
PCT/FI2005/050118 WO2005100689A1 (en) 2004-04-14 2005-04-14 Paper manufacturing process

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JP (1) JP2007532792A (en)
CN (1) CN1942630A (en)
CA (1) CA2561033A1 (en)
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EP1735497A1 (en) 2006-12-27
FI20045132A0 (en) 2004-04-14
CA2561033A1 (en) 2005-10-27
US20070284070A1 (en) 2007-12-13
WO2005100689A8 (en) 2006-04-20

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