JPH0665881A - Method for improving bonding characteristic of defibrillated old paper - Google Patents

Method for improving bonding characteristic of defibrillated old paper

Info

Publication number
JPH0665881A
JPH0665881A JP4242785A JP24278592A JPH0665881A JP H0665881 A JPH0665881 A JP H0665881A JP 4242785 A JP4242785 A JP 4242785A JP 24278592 A JP24278592 A JP 24278592A JP H0665881 A JPH0665881 A JP H0665881A
Authority
JP
Japan
Prior art keywords
fibers
ozone
water
lignin
waste paper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4242785A
Other languages
Japanese (ja)
Inventor
Kazuo Kurihara
和夫 栗原
Satoo Yoshikawa
聡雄 吉川
Yuji Hirai
裕二 平井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nishimatsu Construction Co Ltd
Original Assignee
Nishimatsu Construction Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nishimatsu Construction Co Ltd filed Critical Nishimatsu Construction Co Ltd
Priority to JP4242785A priority Critical patent/JPH0665881A/en
Publication of JPH0665881A publication Critical patent/JPH0665881A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/64Paper recycling

Landscapes

  • Paper (AREA)

Abstract

PURPOSE:To defibrillate old paper into pulp having excellent bonding characteristics. CONSTITUTION:Old paper is defibrillated by a dry method into fibers and a filler. The separated fibers are brought into contact with >=5ppm aqueous solution of ozone or >=5,000ppm ozone gas so that lignin contained in the fibers is oxidized into ozone-oxidized lignin.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は、解繊古紙のボンディン
グ特性改善法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for improving the bonding characteristics of defibrated waste paper.

【0002】[0002]

【従来の技術】地球環境を守る機運が非常に高まった今
日、貴重な森林資源から作られたセルロース繊維は、パ
ルプ・紙として使用された後、廃棄されて古紙となって
も、さらに回収して可能な限り有効に再利用されなけれ
ばならないのは無論である。
2. Description of the Related Art Today, when the momentum for protecting the global environment has greatly increased, cellulose fibers made from valuable forest resources are used as pulp and paper, and are then recovered even if they are discarded as waste paper. Of course, it must be reused as effectively as possible.

【0003】従来、古紙は回収集荷された後、遠隔地の
紙パルプ工場に運ばれ、パルパーと称する装置で、水を
加えて回転翼で撹拌して繊維を解離し、化学的手段で脱
墨し、浮遊法で繊維を分離し、この繊維はほとんど全量
を再生紙の原料として利用している。
[0003] Conventionally, waste paper is once collected and loaded, and then transported to a pulp and paper mill in a remote place. A device called a pulper is used to disintegrate fibers by adding water and stirring with a rotary blade, and deinking by chemical means. Then, the fibers are separated by the floating method, and almost all of the fibers are used as a raw material for recycled paper.

【0004】[0004]

【発明が解決しようとする課題】しかし、上記従来の古
紙リサイクル法は、繊維を解離する工程で、セルロース
が短くなり、またヘミセルロースやフィブリル構造(繊
維の枝状構造)が消失し、再生後の紙力が低下するとい
う根本的課題を有していた。
However, in the above-mentioned conventional waste paper recycling method, cellulose is shortened and hemicellulose and fibril structure (branch structure of fiber) disappear in the step of dissociating the fiber, and after the regeneration, It had a fundamental problem that paper strength was reduced.

【0005】また、上記従来の古紙リサイクル法は、解
繊のために多量の水を使用することから、水資源の浪
費、排水汚染の課題を合わせ持っている。
Further, since the above-mentioned conventional waste paper recycling method uses a large amount of water for defibration, it has problems of wasting water resources and polluting waste water.

【0006】さらにまた、上記従来の古紙リサイクル法
は、通常古紙が最も多く発生する大都市より遠隔地に処
理工場があって、しかも、その処理工場が紙パルプ工場
に限定されていることから、回収費用・処理費用等の経
費が嵩んで回収リサイクル率はなかなか向上し得ないと
いう課題を有していた。
Furthermore, in the above-mentioned conventional waste paper recycling method, since there is a processing factory in a remote place from a big city where waste paper usually occurs most, and the processing factory is limited to a pulp and paper factory, There was a problem that the collection and recycling rate could not be improved due to the high costs such as collection costs and processing costs.

【0007】そこで本発明は、上記課題を解決すべくな
されたもので、古紙から回収した繊維は天然木材より生
成した繊維に比べて、絡み合いずらく、接着性が悪い、
すなわちボンディング特性が悪いことに鑑み、これら物
理的性能低下を極力抑えることで、再生紙の原料として
のみでなく、多目的(例えば建築資材)に利用可能と
し、その結果、回収リサイクル率を向上することで天然
資源の有効活用に貢献できる解繊古紙のボンディング特
性改善法を提供することを目的としたものである。
Therefore, the present invention has been made to solve the above problems. Fibers recovered from waste paper are less likely to be entangled with each other and have poorer adhesiveness than fibers produced from natural wood.
In other words, in view of poor bonding characteristics, by suppressing these physical performance deterioration as much as possible, it can be used not only as a raw material for recycled paper but also for multiple purposes (for example, building materials), and as a result, the recovery and recycling rate can be improved. The purpose of the present invention is to provide a method for improving the bonding characteristics of defibrated waste paper, which can contribute to the effective utilization of natural resources.

【0008】さらに、本発明の他の目的とするところ
は、古紙の主な発生地である都市近郊でも、容易に処理
できる解繊古紙のボンディング特性改善法を提供するこ
とを目的としたものである。
Another object of the present invention is to provide a method for improving the bonding property of defibrated waste paper, which can be easily processed even in the suburbs where the waste paper is mainly generated. is there.

【0009】[0009]

【課題を解決するための手段】上記の目的に沿い、先述
特許請求の範囲を要旨とする本発明の構成は前述課題を
解決するために、古紙を乾式解繊し繊維と填料とを分離
し、分離した繊維と5ppm以上の濃度のオゾン水ある
いは5000ppm以上の濃度のオゾンガスとを接触さ
せて、繊維中に含有するリグニンをオゾン酸化リグニン
に酸化するようになしたことを特徴とする技術的手段を
講じたものである。
In order to solve the above-mentioned problems, in order to solve the above-mentioned problems, the waste paper is dry defibrated to separate fibers and fillers in order to solve the above-mentioned problems. The technical means characterized in that the separated fiber is brought into contact with ozone water having a concentration of 5 ppm or more or ozone gas having a concentration of 5000 ppm or more to oxidize the lignin contained in the fiber into ozone-oxidized lignin. Was taken.

【0010】[0010]

【作用】次に本発明法の作用を説明するが、理解を深め
るため、先にパルプ(本願では、繊維という)の構造を
説明しておく。繊維(パルプ)は木材をリファイナーで
すり潰し繊維を解離させた機械パルプと、木材を蒸解し
て化学的方法でリグニンを取り除いた化学パルプとに大
別される。そして、機械パルプによる繊維は脱リグニン
処理をしていないため、「図3」に示すごとく、セルロ
ース及びヘミセルロースよりなる繊維素101,10
1,101・・・が、複数本リグニン物質102(図で
は黒く塗りつぶした部分)で束ねられて繊維100を構
成してなる。そして、この繊維100は、通常フィブリ
ルと称される多数の枝別れ部101a,101a,10
1a・・・を有してなる。
Next, the operation of the method of the present invention will be described, but in order to deepen understanding, the structure of pulp (in the present application, referred to as fiber) will be described first. Fiber (pulp) is roughly classified into mechanical pulp obtained by crushing wood with a refiner to dissociate fibers, and chemical pulp obtained by cooking wood to remove lignin by a chemical method. Since fibers made from mechanical pulp have not been subjected to delignification treatment, as shown in "Fig. 3", fibers 101 and 10 made of cellulose and hemicellulose are used.
1, 101 ... Are bundled with a plurality of lignin substances 102 (blackened portions in the figure) to form fibers 100. The fiber 100 has a large number of branch portions 101a, 101a, 10 which are usually called fibrils.
1a ...

【0011】なお、化学パルプの繊維は、図示はしてい
ないが、「図3」の黒く塗ったリグニン物質102が少
なくなっているが、化学パルプの繊維といえどもリグニ
ン物質102が皆無ではなく、繊維束の表面にはほとん
どリグニン102を有さないが、セルロース及びヘミセ
ルロースよりなる繊維素101,101,101・・・
を束ねるのはやはりリグニン物質102で、一般的には
機械パルプの繊維は重量比で約20〜33%の、化学パ
ルプの繊維では約2〜4%のリグニン物質102を含有
している。
Although the chemical pulp fibers are not shown in the figure, the amount of the lignin substance 102 painted in black in FIG. 3 is small, but the chemical pulp fibers are not completely free of the lignin substance 102. , The surface of the fiber bundle has almost no lignin 102, but is composed of cellulose and hemicellulose.
Is also bundled with lignin material 102, typically about 20-33% by weight of mechanical pulp fibers and about 2-4% by weight of chemical pulp fibers.

【0012】そこで、本発明は、古紙を乾式解繊、すな
わち古紙に機械的外力を加えて繊維に解離するので、水
の使用が不要で小型な装置で所望の処理能力の解繊がで
き、排水処理の必要性が無いという利点を有するが、古
紙より機械的にうまく繊維を解離したとしても、水と撹
拌力とで古紙の繊維を解離する従来例に比べては、繊維
が切断される蓋然性は大きくなる。しかし、「図3」に
示す枝別れ部101a,101a,101a・・・は従
来のパルパーを使用すると溶けたり折れたりして消失す
るのに比べ、本発明法では無論多くは外力によってもぎ
取られるが、その際に外力が加わることで新たな枝別れ
部101aが生成され、結果として枝別れ部101a,
101a,101a・・・が低減しないという作用を呈
する。
Therefore, according to the present invention, since the waste paper is dry defibrated, that is, the waste paper is dissociated into fibers by applying a mechanical external force, it is possible to defibrate the desired processing capacity with a small apparatus without the use of water. It has the advantage of not requiring wastewater treatment, but even if the fibers are mechanically dissociated better than the waste paper, the fibers will be cut compared to the conventional example in which the fibers of the waste paper are dissociated with water and stirring force. The probability increases. However, the branching portions 101a, 101a, 101a, ... Shown in FIG. 3 are melted or broken when a conventional pulper is used and disappear, whereas the branching portions 101a, 101a, 101a ... At that time, a new branching portion 101a is generated by applying an external force, and as a result, the branching portion 101a,
There is an effect that 101a, 101a ... Do not decrease.

【0013】また、本発明法は分離した繊維と、5pp
m以上の濃度のオゾン水あるいは5000ppm以上の
濃度のオゾンガスとを接触させるので、繊維中に含有す
るリグニンをオゾン酸化リグニンに酸化する作用を呈す
る。
The method of the present invention also uses separated fibers and 5 pp.
Since ozone water having a concentration of m or more or ozone gas having a concentration of 5000 ppm or more is brought into contact with the ozone water, it exhibits an action of oxidizing lignin contained in the fiber into ozone-oxidized lignin.

【0014】リグニンは分子量が非常に大きい複雑な構
成をしており、化学的に究めて安定した物質であるの
で、分解することも困難で接着性も悪い、そこで、究め
て強い酸化力を有するオゾンで分解できないかと試行し
たところ、リグニンを分解する以前にセルロースおよび
ヘミセルロースを分解するであろうとの推測に反し、オ
ゾンはセルロースを選択的に分解する作用を呈すること
が判明した。
Since lignin has a complex structure with a very large molecular weight and is a chemically stable substance, it is difficult to decompose and has poor adhesiveness. Therefore, it has a strong oxidizing power. When we tried to decompose ozone, it was found that ozone exhibited a selective decomposition effect on cellulose, contrary to the assumption that cellulose and hemicellulose would be decomposed before the decomposition of lignin.

【0015】もっとも、オゾンがリグニンを分解すると
いっても、200〜300の分子量のリグニンを数個乃
至数十個の分子量の物質に分解するのでは無く、本発明
のオゾン酸化リグニンはその芳香核を「化1」より「化
2」に示すごとく解裂する程度にとどめたもので、前記
選択的分解もこの範囲で言えるものである。なお、「化
1」および「化2」に示す、Rは以降につながっている
側鎖部分を示すものである。
However, even though ozone decomposes lignin, it does not decompose lignin having a molecular weight of 200 to 300 into a substance having a molecular weight of several to several tens, and the ozone-oxidized lignin of the present invention has its aromatic nucleus. Is limited to the extent that it is cleaved from "Chemical formula 1" to "Chemical formula 2", and the selective decomposition can also be applied within this range. In addition, R shown in "Chemical formula 1" and "Chemical formula 2" represents a side chain portion which is connected thereafter.

【0016】[0016]

【化1】 [Chemical 1]

【0017】[0017]

【化2】 [Chemical 2]

【0018】そして、元来、「化1」に示すごとき構造
のグニンンは物理的には表面が平面的で、化学的には反
応性が究めて小さいが、「化2」に示すごとく芳香核が
解裂されたオゾン酸化リグニンは表面が凹凸面的で、化
学的には反応性が大きくなる作用を、すなわち、ボンデ
ィング特性を増す作用を呈するものである。
Originally, the structure of Gunnin having the structure shown in "Chemical formula 1" is physically flat on the surface and chemically low in reactivity, but as shown in "Chemical formula 2", the aromatic nucleus is shown. Ozone-oxidized lignin, which has been cleaved, has an uneven surface and chemically exhibits an action of increasing reactivity, that is, an action of increasing bonding characteristics.

【0019】[0019]

【実施例】次に、本発明の実施例を添附図面に従って説
明すれば以下の通りである。本発明法は、まず、古紙を
乾式解繊し繊維と填料とを分離する。
Embodiments of the present invention will be described below with reference to the accompanying drawings. According to the method of the present invention, first, waste paper is dry-defibrated to separate the fiber and the filler.

【0020】古紙を乾式で解繊するには、「図2」にも
っとも明らかに示すごとき解繊機2が使用できる。すな
わち、21が解繊機2の本体で、この本体21には一端
側(図奥側)に古紙を取り込む取入口22を、他端側に
(図手前側に)解繊したパルプ原料を排出する排出口2
3を設け、さらに該本体21内には一端側から他端側
(図において、奥手前方向)に水平に設けた駆動軸26
によって高速回転する回転子24を収納してある。
For dry defibration of waste paper, the defibration machine 2 as most clearly shown in FIG. 2 can be used. That is, 21 is the main body of the defibrating machine 2, and the main body 21 has an inlet 22 for taking in the waste paper at one end side (the back side in the drawing) and discharging the defibrated pulp raw material for the other end side (to the front side in the drawing). Outlet 2
3, and a drive shaft 26 horizontally provided in the main body 21 from one end side to the other end side (front side in the drawing).
A rotor 24 that rotates at high speed is stored.

【0021】そして、上記回転子24は多数の放射状翼
24a,24a,24a・・・で構成され、一方本体2
1の放射状翼24a,24a,24a・・・の先端より
所定の距離離れた位置にある内壁には奥手前方向に沿っ
て多数のライナー25,25,25,・・・を設け凹凸
面となしてある。なお、図示はしていないが、上記駆動
軸26の一端側には送風翼が取付けられ、取入口22よ
り排出口23に向けて古紙を輸送する送風ファーンを取
付けてある。
The rotor 24 is composed of a large number of radial wings 24a, 24a, 24a ...
A large number of liners 25, 25, 25, ... Are provided along the frontward direction on the inner wall at a predetermined distance from the tips of the radial wings 24a, 24a, 24a. There is. Although not shown, a blower blade is attached to one end side of the drive shaft 26, and a blower fan for transporting used paper from the inlet 22 to the outlet 23 is attached.

【0022】したがって、上記解繊機2の取入口22に
「図1」に示す古紙ホッパー1の排出口を連通させる
と、古紙は順次解繊機2内に流入し、本体21の内壁に
衝突して次第に解繊されて綿毛状になって排出口23よ
り流出する。
Therefore, when the outlet 22 of the used paper hopper 1 shown in FIG. 1 is communicated with the inlet 22 of the defibrator 2, the used paper sequentially flows into the defibrator 2 and collides with the inner wall of the main body 21. The fibers are gradually disintegrated into fluff and flow out from the outlet 23.

【0023】そして、古紙にはセルロースよりなる繊維
に種々の填料(クレー、滑石、炭酸カルシューム、チタ
ン白等で、紙の平滑度、不透明性、重量等を増加するた
め配合される)が配合されているので、繊維と填料とを
分離する。この分離は古紙を解繊すると比較的長い繊維
と、粒形が小さい粉状の填料とになるので両者の分離は
容易で、篩分分離、分級分離等の従来の乾式分離装置が
使用できる。
[0023] Then, in the waste paper, various fillers (clay, talc, calcium carbonate, titanium white, etc., which are added to increase the smoothness, opacity, weight, etc. of the paper) are added to fibers made of cellulose. Therefore, the fiber and the filler are separated. In this separation, when the waste paper is defibrated, it becomes a relatively long fiber and a powdery filler having a small particle shape, so that the two can be easily separated, and a conventional dry separation apparatus such as sieve separation and classification separation can be used.

【0024】なお、本実施例では、乾式分級装置とし
て、従来公知な構成のサイクロン分離装置3を使用して
おり、比重は小さいが大きくて重い繊維はサイクロン本
体31の下部にたまり、比重は大きいが小さくて軽い填
料は気流に随伴して上部排出口32から流出してバッグ
フィルター34で捕集されるようになし、また本体31
の下部にたまった繊維は気密ロータリーフィーダ33を
介して下部排出口34より順次取出すことができるよう
になしてある。
In this embodiment, a cyclone separating device 3 having a conventionally known structure is used as a dry classifying device. Fibers having a small specific gravity but large and heavy are accumulated in the lower part of the cyclone main body 31 and have a large specific gravity. The small and light filler is made to flow out of the upper outlet 32 along with the air flow and be collected by the bag filter 34.
The fibers accumulated in the lower part of the can be sequentially taken out from the lower discharge port 34 via the airtight rotary feeder 33.

【0025】そして、本発明は分離した繊維と5ppm
以上の濃度のオゾン水あるいは5000ppm以上の濃
度のオゾンガスとを接触させて、繊維中に含有するリグ
ニンをオゾン酸化リグニンに酸化する。
And the present invention is based on the use of separated fibers and 5 ppm.
The lignin contained in the fiber is oxidized to ozone-oxidized lignin by contacting it with ozone water having the above concentration or ozone gas having a concentration of 5000 ppm or more.

【0026】上記オゾンガスを得るには、従来公知な放
電式オゾナイザーで空気または酸素(通常、酸素ボンベ
より供給される)を原料として容易に得られる。また上
記オゾン水を得るには水にオゾンガスを曝気してオゾン
水を得る方法と、水を電気分解して直接オゾン水を得る
方法とがある。
In order to obtain the above ozone gas, a conventionally known discharge type ozonizer can be easily obtained using air or oxygen (usually supplied from an oxygen cylinder) as a raw material. In order to obtain the above-mentioned ozone water, there are a method of aerating ozone gas to water to obtain ozone water, and a method of electrolyzing water to directly obtain ozone water.

【0027】本実施例では、水を電気分解してオゾン水
を得る方式を採用してあり、オゾン水発生装置4の本体
41は、固形電解質膜42で陽極室43aと陰極室44
aとに仕切られ、この固形電解室膜42の一面には二酸
化鉛等の触媒からなる陽極電極43を、他面には白金ま
たはステンレス等からなる陰極電極44を、夫々接触部
と非接触部を有するようにして(具体的に夫々の電極は
多孔板となしてある)重ねてあり、陽極電極43を収納
され陽極室43aには水の流入口45と流出口46とを
設け、陰極電極44が収納される陰極室44aには水素
流出口47を設けてなる。
In this embodiment, a method of electrolyzing water to obtain ozone water is adopted, and the main body 41 of the ozone water generator 4 is a solid electrolyte membrane 42 with an anode chamber 43a and a cathode chamber 44.
The solid electrolytic chamber membrane 42 is divided into an anode electrode 43 made of a catalyst such as lead dioxide and a cathode electrode 44 made of platinum or stainless steel on the other side. (Specifically, each electrode is a perforated plate) and the anode electrode 43 is housed therein, and the anode chamber 43a is provided with a water inlet 45 and a water outlet 46. A hydrogen outlet 47 is provided in the cathode chamber 44a in which 44 is housed.

【0028】そして、上記陽極電極43と陰極電極44
とには電源48により直流電圧を印加し、流入口45よ
り流入した水は陽極電極43が接触する固形電解質膜4
2の一面に接触して流出口46より流出するようにな
し、陰極室44aは空部となすか水を満たしておく。
Then, the above-mentioned anode electrode 43 and cathode electrode 44
A direct current voltage is applied by a power source 48 to the water, and the water flowing in from the inflow port 45 contacts the solid electrolyte membrane 4 with the anode electrode 43.
The cathode chamber 44a is vacant or filled with water.

【0029】すると、陽極室43a内の水は電気分解さ
れ、陽極室43a内には酸素が発生しこの酸素の一部は
陽極電極43の触媒採用でオゾンとなって一部は水に溶
け一部は気泡となる。すなわち、上記流出口46からは
オゾンを溶存した水と、気泡状の酸素及びオゾンとが流
出することになる。
Then, the water in the anode chamber 43a is electrolyzed, and oxygen is generated in the anode chamber 43a. A part of this oxygen becomes ozone by using the catalyst of the anode electrode 43 and a part is dissolved in water. The part becomes a bubble. That is, water in which ozone is dissolved, and bubble-shaped oxygen and ozone flow out from the outlet 46.

【0030】そして、分離した繊維と5ppm以上の濃
度のオゾン水あるいは5000ppm以上の濃度のオゾ
ンガスを接触させるには、従来公知な噴霧式、流動床式
等が利用できる。
To bring the separated fibers into contact with ozone water having a concentration of 5 ppm or more or ozone gas having a concentration of 5000 ppm or more, a conventionally known spraying type, fluidized bed type or the like can be used.

【0031】オゾン水の場合は噴霧式が使用でき、図示
例では、サイクロン分離装置3の下部排出口34より排
出される繊維をベルトコンベヤー51に乗せて搬送し、
上方よりオゾン水をノズル52で噴霧している。しか
し、この噴霧方法ではオゾン水が繊維全体に接触しない
場合があるので繊維を攪拌する装置を設けることが望ま
しく、別の実施例としては、ベルトコンベヤ−51に代
え下部排出口34より排出される繊維を空気輸送管で空
気輸送し、この空気輸送管内にオゾン水を噴霧する方法
を試みたところ繊維とオゾン水との接触頻度が大変効果
的であった。
In the case of ozone water, a spray type can be used. In the illustrated example, the fibers discharged from the lower discharge port 34 of the cyclone separating device 3 are carried on the belt conveyor 51 and conveyed.
Ozone water is sprayed from above from the nozzle 52. However, in this spraying method, ozone water may not come into contact with the entire fibers, so it is desirable to provide a device for agitating the fibers. In another embodiment, instead of the belt conveyor 51, it is discharged from the lower discharge port 34. When fibers were pneumatically transported by an air transportation pipe and ozone water was sprayed into the air transportation pipe, the frequency of contact between the fibers and ozone water was very effective.

【0032】オゾンガスを使用する場合も同様に、攪拌
装置で繊維を攪拌し流動床となして流動中の繊維とオゾ
ンガスとを接触させるのが効率的で、前記サイクイロン
分離装置3内にオゾンガスを噴射してもよいが、填料を
除去してからオゾンを接触した方がオゾンを有効に使用
できるので、別途オゾン接触槽を設け気流または攪拌翼
で繊維を攪拌しつつオゾンガスを送入するとよい。
Similarly, when ozone gas is used, it is efficient to stir the fibers with a stirrer to form a fluidized bed so that the flowing fibers are brought into contact with the ozone gas, and the ozone gas is injected into the cyclone separator 3. However, since ozone can be effectively used by contacting ozone after removing the filler, it is advisable to provide an ozone contact tank separately and feed the ozone gas while agitating the fibers with an air flow or a stirring blade.

【0033】なお、オゾン水は5ppm以上、オゾンガ
スは5000ppm以上としたのは、実験の結果リグニ
ンの酸化が認められたからであるのは無論であるが、こ
こで注目されるのは、両者では必要オゾン濃度が相違す
ることである。すなわち、オゾン水中の5ppmのオゾ
ンの質量はガス状とすると約2500ppmに相当する
が、実際にはオゾンガスでは5000ppmを必要とし
た。この相違はオゾン水は繊維に付着(接触が確実)し
てリグニンを酸化するのと水の存在が酸化反応速度を速
めるためと推考される。
The ozone water is 5 ppm or more and the ozone gas is 5000 ppm or more because it is obvious that the lignin is oxidized as a result of the experiment, but it is necessary to note that both are necessary. The difference is the ozone concentration. That is, the mass of 5 ppm of ozone in ozone water corresponds to about 2500 ppm when it is in a gaseous state, but actually, 5000 ppm was required for ozone gas. This difference is presumed to be because ozone water adheres to the fibers (contact is ensured) to oxidize lignin and the presence of water accelerates the oxidation reaction rate.

【0034】[0034]

【発明の効果】本発明は上記のごとく、古紙を乾式解繊
するため、簡易な装置で古紙を処理でき、多量の水を使
用することもないので都市近郊でも処理でき、しかも、
繊維の枝状構造が失われない解繊古紙のボンディング特
性改善法を提供することができるものである。
INDUSTRIAL APPLICABILITY As described above, according to the present invention, since waste paper is dry defibrated, it can be treated with a simple device, and since it does not use a large amount of water, it can be treated in the suburbs of the city.
It is possible to provide a method for improving the bonding property of defibrated waste paper in which the branch structure of the fiber is not lost.

【0035】また、本発明は含有リグニンをオゾンで酸
化し、オゾン酸化リグニンとなしてあるので、表面が凹
凸面的で、反応性が大きくなり、繊維どうしが絡み易く
なる解繊古紙のボンディング特性改善法を提供すること
ができるものである。
Further, according to the present invention, since the lignin contained is oxidized with ozone to form ozone-oxidized lignin, the surface has unevenness, the reactivity is increased, and the fibers are easily entangled with each other. It is possible to provide an improvement method.

【0036】まお、本発明によりボンディング特性改善
された解繊古紙は、常法により抄紙すると、再生紙特有
の紙力の低減がなく、紙力の優れた再生紙原料として使
用できることは無論であるが、種々の建築資材の原料と
して利用可能となる。具体的には、ボンディング特性が
改善されているので適当なバインダー材を混入して成形
すれば従来の天然木材に代わる再生木質ボードを得るこ
とができ、その他、モルタル等に繊維骨材として使用す
れば軽量化、強度向上が期待でき、このように古紙の利
用範囲を拡大することにより、リサイクル率を向上でき
資源有効活用に大きな貢献ができるものである。
It is needless to say that the defibrated waste paper having improved bonding properties according to the present invention can be used as a recycled paper raw material having excellent paper strength without reducing the paper strength peculiar to the recycled paper when made by a conventional method. Can be used as a raw material for various building materials. Specifically, since the bonding properties have been improved, it is possible to obtain a recycled wood board that replaces conventional natural wood by mixing with an appropriate binder material, and use it as a fiber aggregate in mortar, etc. For example, weight reduction and strength improvement can be expected. By expanding the range of use of waste paper in this way, the recycling rate can be improved and a great contribution can be made to the effective use of resources.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明法を実施する装置例正面図である。FIG. 1 is a front view of an example of an apparatus for carrying out the method of the present invention.

【図2】本発明に使用される解繊機の一例を示す縦断面
図である。
FIG. 2 is a vertical sectional view showing an example of a defibrating machine used in the present invention.

【図3】パルプ繊維の拡大正面図である。FIG. 3 is an enlarged front view of pulp fibers.

【符号の説明】[Explanation of symbols]

1 ホッパー 2 解繊機 3 サイクイロン分離装置 4 オゾン水発生装置 1 hopper 2 defibrator 3 cyclone separator 4 ozone water generator

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 古紙を乾式解繊し繊維と填料とを分離
し、分離した繊維と5ppm以上の濃度のオゾン水ある
いは5000ppm以上の濃度のオゾンガスとを接触さ
せて、繊維中に含有するリグニンをオゾン酸化リグニン
に酸化するようになしたことを特徴とする解繊古紙のボ
ンディング特性改善法。
1. Dry defibration of waste paper to separate fibers and fillers, and the separated fibers are contacted with ozone water having a concentration of 5 ppm or more or ozone gas having a concentration of 5000 ppm or more to remove lignin contained in the fibers. A method for improving bonding characteristics of defibrated waste paper, which is characterized by being oxidized to ozone-oxidized lignin.
JP4242785A 1992-08-19 1992-08-19 Method for improving bonding characteristic of defibrillated old paper Pending JPH0665881A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4242785A JPH0665881A (en) 1992-08-19 1992-08-19 Method for improving bonding characteristic of defibrillated old paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4242785A JPH0665881A (en) 1992-08-19 1992-08-19 Method for improving bonding characteristic of defibrillated old paper

Publications (1)

Publication Number Publication Date
JPH0665881A true JPH0665881A (en) 1994-03-08

Family

ID=17094257

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4242785A Pending JPH0665881A (en) 1992-08-19 1992-08-19 Method for improving bonding characteristic of defibrillated old paper

Country Status (1)

Country Link
JP (1) JPH0665881A (en)

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