JPS6328992A - Deinking of old printed paper - Google Patents
Deinking of old printed paperInfo
- Publication number
- JPS6328992A JPS6328992A JP61171872A JP17187286A JPS6328992A JP S6328992 A JPS6328992 A JP S6328992A JP 61171872 A JP61171872 A JP 61171872A JP 17187286 A JP17187286 A JP 17187286A JP S6328992 A JPS6328992 A JP S6328992A
- Authority
- JP
- Japan
- Prior art keywords
- pulp
- waste paper
- deinking
- concentration
- compressive force
- 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.)
- Granted
Links
- 239000002761 deinking Substances 0.000 title claims description 19
- 239000010893 paper waste Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 239000003513 alkali Substances 0.000 claims description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 13
- 238000011282 treatment Methods 0.000 claims description 13
- 238000013019 agitation Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000007844 bleaching agent Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000007645 offset printing Methods 0.000 claims description 7
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 7
- 239000004094 surface-active agent Substances 0.000 claims description 7
- 239000004115 Sodium Silicate Substances 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 6
- 238000007639 printing Methods 0.000 claims description 3
- 206010001497 Agitation Diseases 0.000 claims 6
- 238000007865 diluting Methods 0.000 claims 1
- 238000009897 hydrogen peroxide bleaching Methods 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000000123 paper Substances 0.000 description 7
- 229920001131 Pulp (paper) Polymers 0.000 description 5
- 230000032683 aging Effects 0.000 description 5
- 238000005188 flotation Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000004898 kneading Methods 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 238000010907 mechanical stirring Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010561 standard procedure Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007644 letterpress printing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 244000291564 Allium cepa Species 0.000 description 1
- 235000002732 Allium cepa var. cepa Nutrition 0.000 description 1
- 235000021537 Beetroot Nutrition 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Paper (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、オフセット印刷古紙を含有する印刷古紙から
インキが付着したままの未脱墨繊維（以下黒ヒゲという
。）が少く、かつ白色度が高いパルプブを得る脱墨方法
に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is aimed at reducing undeinked fibers to which ink remains attached (hereinafter referred to as black whiskers) from printing waste paper containing offset printing waste paper, and improving whiteness. This invention relates to a deinking method for obtaining high pulp.
従来、廃資源の有効利用の見地から古紙の再利用が行な
われている。一方、印刷技術の面からは凸版印刷より印
迫１面がきれいなオフセット印刷が近来増加してきてい
る。Conventionally, waste paper has been recycled from the standpoint of effectively utilizing waste resources. On the other hand, in terms of printing technology, offset printing, which has a clearer impression on one side than letterpress printing, has been increasing in recent years.
しかし、凸版印刷用のインキとオフセット印刷用のイン
キではその組成が異なる。その１例を次表に示す。However, ink for letterpress printing and ink for offset printing have different compositions. An example is shown in the table below.
前記表に示すようにオフセット用インキ中にはフェノ−
ρ系の合成樹脂、アマニ油等の植物油が多量に含まれて
おシ、これらの成分が印刷されると酸化重合して繊維に
付着し、従来性われている脱墨方法すなわちパルパーで
アルカリ、ケイ酸ソーダ、界面活性剤等よ構成る脱墨剤
及び漂白剤例えば過酸化水素を添加し、離解した後フロ
ーテーション、洗浄を行う方法とか、フローテーション
、洗浄の前後でアルカリ、ケイ酸ソーダ、界面活性剤よ
り脱墨剤及び漂白剤例えば過酸化水素を添加し脱墨処理
をくり返す方法では、高白色度でかつ黒ヒゲの少いパル
プを得ることは不可能であった。そのためオフセット古
紙を含有する古紙パルプは板紙、新聞紙等の下級紙用に
しか使用されておらず、高白色度でかつ紙面のきれいさ
が必要な中級紙等には利用されていなかった。As shown in the table above, offset ink contains phenol.
It contains large amounts of ρ-based synthetic resins and vegetable oils such as linseed oil, and when these components are printed, they oxidize and polymerize and adhere to the fibers, making it difficult to use traditional deinking methods such as alkaline, pulper, etc. Deinking agents and bleaching agents composed of sodium silicate, surfactants, etc. For example, hydrogen peroxide is added, disintegrated, followed by flotation and washing, and before and after flotation and washing, alkali, sodium silicate, By adding a deinking agent and a bleaching agent such as hydrogen peroxide to a surfactant and repeating the deinking process, it has been impossible to obtain pulp with high whiteness and few black whiskers. For this reason, waste paper pulp containing offset waste paper has been used only for lower-grade papers such as paperboard and newspaper, and has not been used for intermediate-grade papers that require high whiteness and a clean paper surface.
本発明者らはこの問題を解決すべく研究の結果、特願昭
５５−１１３６５８号（特公昭６ｊ−１１３５３号公報
参照）にて、高アルカリｍ加の高濃度パルプを加温下で
圧縮力を与えながら機械的攪拌を行なうことによりオフ
セット印刷古紙を含有する古紙を脱墨する方法を提案し
た。As a result of research to solve this problem, the inventors of the present invention have published Japanese Patent Application No. 55-113658 (see Japanese Patent Publication No. 6J-11353) by compressing high-density pulp with a high alkali content under heating. We proposed a method for deinking waste paper containing offset printing waste paper by applying mechanical agitation while applying .
本発明の目的は前記先願発明によって製造されたパルプ
ブを、後処理することによシ、更に高白色度で黒ヒゲの
数の少ない高品位バｙデを製造する方法を提供すること
である。It is an object of the present invention to provide a method for producing high-quality beetroot with high whiteness and a small number of black whiskers by post-processing the pulp produced according to the invention of the prior application. .
前記目的を達成するための本発明の印刷古紙の脱墨方法
はオフセット古紙を含有するバルプスフリーを次の第１
工程と第２工程とを包含する方法よシなる第１の発明と
、更に第５工程をも包含する第２の発明よシなるもので
ある。In order to achieve the above object, the method for deinking printed waste paper of the present invention is to remove vulps-free containing offset waste paper by the following first method.
The first invention is a method that includes the step and the second step, and the second invention is a method that also includes the fifth step.
第１工程：
オフセット印刷古紙を含有する印刷古紙に苛性ソーダ、
ケイ酸ソーダ及び界面活性剤よりなる脱墨剤及び過酸化
水素漂白剤を添加し、１５重量一以上のバμデ濃度並び
にａ ｏ ｇ／ｌ（ＮａＯＨとして）以上のアルカリ濃
度において、レフアイナー、ニーダー、二軸ミキサー又
はデイヌバーザーを使用し、加温下で圧縮力を与えなが
ら機械的撹拌処理を行なう工程。1st step: Add caustic soda to printed waste paper containing offset printed waste paper,
By adding a deinking agent consisting of sodium silicate and a surfactant and a hydrogen peroxide bleach, at a binder concentration of 15% by weight or more and an alkali concentration of ao g/l (as NaOH) or more, a refiner, a kneader, etc. A process in which mechanical stirring is performed using a twin-screw mixer or Dayne Barzer while applying compressive force under heating.
第２工程：
耐１工程の処理パルプを１５時間以上熟成した後に該パ
ルプの濃度を１５〜２５重量一に保持し、レフアイナー
、ニーダー、二軸ミキサー又はディスパーザ−を使用し
、圧縮力を与えながら機械的撹拌処理を行なう工程。2nd step: After aging the pulp treated in the first step for 15 hours or more, the pulp is kept at a concentration of 15 to 25% by weight and compressed using a refiner, kneader, twin-shaft mixer, or disperser while applying compressive force. A process that involves mechanical stirring.
この際には処理温度は常温又は加温下のどちらでも良い
。In this case, the treatment temperature may be either room temperature or heating.
＠３工程：
（これは第２の発明に含壕れる工程である。）第２工程
で処理されたパルプを７チ以下の濃度に稀釈し製紙工程
で常用される低濃度叩解機又は離解機で処理して機械的
攪拌を与えパルプに強力な剪断力を与える。@3 step: (This is a step included in the second invention.) A low-concentration beater or disintegrator that dilutes the pulp treated in the second step to a concentration of 7% or less and is commonly used in the paper manufacturing process. The pulp is treated with mechanical agitation to impart strong shearing force to the pulp.
つぎに本発明について詳しく説明する。Next, the present invention will be explained in detail.
本発明で使用できる古紙厚料としては、オフセット印刷
古紙それ自体又はこれに凸版古紙が混入しているもので
も何ら差し支えない。The waste paper thickness that can be used in the present invention may be either offset printing waste paper itself or used letterpress paper mixed therein.
古紙パルプに添加する脱墨剤は苛性ソーダ−、ケイ酸ソ
ーダ及び界面活性剤等からなり、特にアルカリ剤の添加
率が重要な役目を果し、古紙パルプが接するアルカリ濃
度としてｓａｇ／ｌ（ＮａＯＨとして）以上が必要であ
る。例えば、通常行なわれているパルプ濃度５．０重量
一、アルカリ添加率！ＬＯ重量一（対パルプ）とした場
合のパルプ液のアルカリ濃度は１．６９ ／ ｔと少な
く、この条件ではオフセット印刷古紙は全く脱墨されな
いことが認められた。そして、前述の高い濃度のアルカ
リが強固に接着しているオフセットインキの被膜を壊し
繊維からインキを離脱させる作用を有するものであって
、前記の先願発明で開示した如く実験によればａ ｏ
ｇ７ｔより低いアルカリ濃度ではオフセットインキの被
膜を壊す反応が遅く、十分な脱墨効果が奏されない。The deinking agent added to the waste paper pulp consists of caustic soda, sodium silicate, surfactant, etc. The addition rate of the alkaline agent plays an especially important role. ) or more are required. For example, the usual pulp concentration is 5.0% by weight and the alkali addition rate! The alkaline concentration of the pulp liquid when the LO weight was 1 (relative to the pulp) was as low as 1.69/t, and it was observed that under this condition, the offset printed waste paper was not deinked at all. The alkali at a high concentration has the effect of breaking the strongly adhering film of the offset ink and separating the ink from the fibers, and according to experiments as disclosed in the earlier invention, ao
If the alkali concentration is lower than g7t, the reaction that destroys the offset ink film will be slow, and a sufficient deinking effect will not be achieved.
本発明の第１工程におけるパルプ濃度が高いことは添加
するアルカリ剤の量を減少しうる意義を有するが、それ
以外に本発明においては、パルプに圧縮力を与えた状態
で機械的攪拌を行うための必須条件となっている。即ち
加温下でアルカリ処理されたオフセット印刷古紙のイン
キ被膜は壊れ易くなるが、パルプに圧縮力を加え繊維と
繊維が密に接触した状態で機械的攪拌を行なうことによ
シ繊維からのインキ被膜の剥離が一層促進され著しい効
果を発揮する。そしてパルプ濃度としては１５チ以上が
必要でちり、これよシ低いパルプ濃度ではパルプに十分
圧縮力を与えることが困難となり繊維からのインキの剥
離を効率的に行なうことができない。望ましいパルプ濃
度は２５〜３′５重量一でちる。バμデに及ぼす圧縮力
については厳密に測定することは困難であるが、種々の
試験結果から０．５〜１− Ｏｋｉｌｏｎ”以上の圧力
が必要であると考えられる。The high pulp concentration in the first step of the present invention has the significance of being able to reduce the amount of alkaline agent added, but in addition to this, in the present invention, mechanical stirring is performed while applying compressive force to the pulp. It is a necessary condition for In other words, the ink film on offset printing waste paper that has been treated with alkali under heating becomes fragile, but by applying compressive force to the pulp and performing mechanical agitation with the fibers in close contact, the ink film can be removed from the fibers. The peeling of the coating is further promoted and a remarkable effect is exhibited. A pulp density of 15 or more is required, and if the pulp density is lower than this, it becomes difficult to apply sufficient compressive force to the pulp, and the ink cannot be effectively peeled from the fibers. The preferred pulp density is between 25 and 3'5 by weight. Although it is difficult to precisely measure the compressive force exerted on the binder, it is thought from various test results that a pressure of 0.5 to 1-000 kg or more is required.
本発明の第１工程は加温下で行なわれるが、これはアル
カリによるインキ被膜の破壊作用を促進するとともに漂
白剤としてのＨ２Ｏ２による漂白作用を効率的に行なう
ために必要であシ、温度は５０℃以上が望ましく、５０
℃以下ではインキの離脱も十分でなく、又過酸化水素漂
白剤が効果的に作用しないため白色度の上昇率も劣る。The first step of the present invention is carried out under heating, which is necessary in order to promote the destruction of the ink film by the alkali and to efficiently carry out the bleaching action by H2O2 as a bleaching agent. Desirably 50℃ or higher, 50℃
At temperatures below .degree. C., the ink is not removed sufficiently and the hydrogen peroxide bleach does not work effectively, resulting in a poor rate of increase in whiteness.
なおＨ，０２の濃度は一般に対バμプ重量当りＱ、５〜
５重量一の濃度が望ましい。In addition, the concentration of H,02 is generally Q,5~ per vaping weight.
A concentration of 5 parts by weight is preferred.
次に第２工程においては第１工程で処理後のパルプを高
アルカリ濃度雰囲気の中で一定温度下で一定時間熟成せ
しめることによって、第１工程における処理で繊維から
離脱していないインキをアルカリと反応させインキの被
膜を壊し易くした上で、再びレフアイナー、ニーダー、
二軸ミキサー又はディスパーザ−を使用して圧縮力を与
えながら機械的攪拌を行うことによって繊維からインク
を離脱させる。この時のパルプ濃度は１５チ以上２５チ
以下であることが必要であシ、１５チ未満のパルプ濃度
ではパルプに十分圧縮力をかけることが困難となシ、繊
維からのインクの剥離を効率的に行なうことができない
こと、及び２５チを超えるパルプ濃度では、離脱したイ
ンキを小粒子に破壊し、このインキを逆にパルプ繊維に
すり込む現象が起り、繊維からのインキの離脱を効率的
に行えないという欠点即ち、高白色度のパルプが得られ
ないという欠点がある。Next, in the second step, the pulp treated in the first step is aged for a certain period of time at a constant temperature in an atmosphere with a high alkali concentration, so that the ink that has not separated from the fibers in the treatment in the first step becomes alkali. After reacting to make the ink film easier to break, use a reflex eyeliner, kneader,
The ink is separated from the fibers by mechanical agitation while applying compressive force using a twin-screw mixer or disperser. The pulp density at this time needs to be between 15 and 25 inches. If the pulp density is less than 15 inches, it is difficult to apply sufficient compressive force to the pulp, so it is difficult to remove the ink from the fibers efficiently. However, if the pulp density exceeds 25%, the detached ink will be broken into small particles and this ink will be rubbed into the pulp fibers, making it difficult to effectively remove the ink from the fibers. There is a disadvantage that it cannot be carried out, that is, pulp with high whiteness cannot be obtained.
パルプを熟成せしめる時間は、繊維から離脱していない
インキがアルカリと十分に反応するために必要なもので
、パルプ濃度、アルカリ添加量、温度などによシ最適時
間は変って来るが通常１５〜４時間であり、好ましくは
１〜５時間である。ｆ４２工程の処理において得られた
パルプの白色度及び黒ヒゲの数は、ある種の中級紙に使
用可能なものである。The time for ripening the pulp is necessary for the ink that has not separated from the fibers to sufficiently react with the alkali, and the optimal time varies depending on the pulp concentration, the amount of alkali added, the temperature, etc., but is usually 15~ The duration is 4 hours, preferably 1 to 5 hours. The whiteness and number of black whiskers of the pulp obtained in the f42 process are such that it can be used for certain medium grade papers.
次に第３工程について説明する。第２工程で処理された
パルプは既に大半のインキが繊維から離脱されており、
黒ヒゲはほとんどないが、それでも未だインキの小粒子
が、繊維に残留付着している。Next, the third step will be explained. In the pulp treated in the second step, most of the ink has already been separated from the fibers,
Although there are almost no black whiskers, small particles of ink still remain attached to the fibers.
そこで、第２工程での処理パルプをパルプ濃度を７重量
−以下となるように稀釈し、低濃度叩解機又は離解機に
通し、繊維に強力な剪断力を与えてｔａ維に付着してい
るインキの小粒子を分離することによりパルプの白色度
を更に向上させることが可能となる。Therefore, the treated pulp in the second step is diluted to a pulp concentration of 7% by weight or less, and passed through a low-concentration beater or disintegrator to apply strong shearing force to the fibers so that they adhere to the TA fibers. By separating small particles of ink, it is possible to further improve the whiteness of the pulp.
パルプの処理濃度は７重量一以下であればよいが、通常
のボンデで移送を可能ならしめるためには５重量一以下
の濃度が好ましい。The processing concentration of the pulp may be 7 parts by weight or less, but a concentration of 5 parts by weight or less is preferable in order to enable transport with a normal bonder.
以下に実施例及び比較例を記載するが、先づ実施例及び
比較例において使用した白色度及び黒ヒゲ数の測定法に
ついて説明する。Examples and comparative examples will be described below, but first, methods for measuring whiteness and number of black whiskers used in the examples and comparative examples will be explained.
白色度測定法
■前処理：試料古紙バμブを１００メツシユのワイヤー
クロスを張った箱の中に入れて繊維から離脱しているイ
ンキを清水で充分に洗い流して洗浄パルプを作成する。Whiteness measurement method ■Pretreatment: A sample waste paper bum is placed in a box lined with 100 mesh wire cloth, and the ink separated from the fibers is thoroughly washed away with clean water to prepare a washed pulp.
■ ■の前処理で得られた洗浄パルプをＴＡＰＰ Ｉ標
準法によｊ７１２５９７ｍ”の白色度測定用シートを作
成する。2. A sheet for whiteness measurement of 712597 m'' is prepared from the washed pulp obtained in the pretreatment of 2. using the TAPP I standard method.
■ ハンター反射率計（Ｊ工Ｓ Ｐ８１２３）で３ケ
所の白色度を測定し、その平均値を洗浄パルプの白色度
（（５）として表示する。■ Measure the whiteness at three locations using a Hunter reflectance meter (J-KoS P8123), and display the average value as the whiteness of the washed pulp ((5)).
黒ヒゲ個数測定法
■前処理：白色度測定法における前処理と同様に前処理
を行ない洗浄パルプを作成する。Black beard count measurement method ∎Pretreatment: Pretreatment is performed in the same manner as in the whiteness measurement method to prepare a washed pulp.
■ 洗浄パルプを用いてＴＡＰＰＩ標準法により’５
Ｑ ９／ｍ”の黒ヒゲ測定用シートを作成する。■ '5 by TAPPI standard method using washed pulp.
Q 9/m" black whisker measurement sheet is created.
■ 黒ヒゲは、■で作成した黒ヒゲ測定用シートを水で
濡らして蛍光灯の透過光で２０×２の口の中の長さ１ｍ
１ｌＩ以上の黒ヒゲ数を数えて、洗浄パルプ１ｇ当りの
黒ヒゲの個数で表示する。■ To measure black beards, wet the black beard measurement sheet created in step ■ with water and use transmitted light from a fluorescent light to measure the length of 1 m inside a 20 x 2 mouth.
Count the number of black whiskers of 1lI or more and indicate the number of black whiskers per gram of washed pulp.
〈実施例〉 以下に実施例及び比較例を示し本発明につき説明する。<Example> EXAMPLES The present invention will be explained below with reference to Examples and Comparative Examples.
原料としてはオフセット印刷された新聞古紙と中質古紙
の１＝１の混合物を使用した。As a raw material, a 1:1 mixture of offset-printed newspaper waste paper and medium quality waste paper was used.
なお比較例及び実施例におけるチは全て重量一を示す。In addition, in the comparative examples and examples, all ``chi'' indicate weight 1.
比較例１
予め離解し脱水した故紙パルプ５０２をポリエチレン袋
に入れ表−１に示す所定のパルプ濃度に清水で希釈し、
６０℃の温浴中で予熱し、これに脱墨剤としてＮａ０Ｅ
、Ｎ ＆！ Ｓ ｉ Ｏｓ 、界面活性剤、漂白剤とし
て過酸化水素を添加し、薬品が均一に接触するように良
く混合した後、試験用ニーダ−（森山製作所製）に移し
、６０℃の加温下で２０分間ニーディングした。ニーデ
ィング後、この温度で１時間保持した後、１．０チに希
釈してフローテーション処理しＴａｐｐｉ標準法に標準
白色度測定用シートを作成した。Comparative Example 1 Pre-disintegrated and dehydrated waste paper pulp 502 was placed in a polyethylene bag and diluted with fresh water to a predetermined pulp concentration shown in Table 1.
Preheat in a 60°C hot bath and add Na0E as a deinking agent.
, N &! After adding SiOs, a surfactant, and hydrogen peroxide as a bleaching agent and mixing well so that the chemicals come into uniform contact, the mixture was transferred to a test kneader (manufactured by Moriyama Seisakusho) and heated at 60°C. Kneading was carried out for 20 minutes. After kneading, the mixture was maintained at this temperature for 1 hour, diluted to 1.0% and subjected to flotation treatment to prepare a standard whiteness measurement sheet using the Tappi standard method.
このシートは本発明の第一工程処理のパルプに相当する
。This sheet corresponds to the pulp treated in the first step of the present invention.
白色度及び黒ヒゲ個数を測定した結果を表−１に示す。Table 1 shows the results of measuring whiteness and number of black whiskers.
実施例１
比較例１に於てパルプ濃度２５％でニーディング処理し
たパルプをそのｔまの状態で２時間熟成せしめ、アルカ
リと十分反応させた後表−１に示すパルプ濃度に稀釈又
は濃縮し、再び２０分間ニーディングしだ後、比較例と
同様に稀釈、フローテーション処理しシートを作成した
。これは本発明の第２工程処理後のパルプに相当する。Example 1 The pulp kneaded at a pulp concentration of 25% in Comparative Example 1 was aged for 2 hours at that state until t, and after sufficiently reacting with an alkali, it was diluted or concentrated to the pulp concentration shown in Table 1. After kneading started again for 20 minutes, a sheet was prepared by dilution and flotation treatment in the same manner as in the comparative example. This corresponds to the pulp after the second step treatment of the present invention.
白色度及び黒ヒゲ個数の測定結果を表−１に併記する。The measurement results of whiteness and number of black whiskers are also listed in Table-1.
実施例２
実施例１に於てニーディング処理したパルプを濃度４，
５チに稀釈し、試験用の低濃度叩解機で処理したパルプ
を、比較例と同様に処理してシートを作成した。Example 2 The pulp kneaded in Example 1 was
A sheet was prepared by processing the pulp diluted to 5% and treated with a test low-density beating machine in the same manner as in the comparative example.
これは本発明（第２発明）の第３工程処理後のパルプに
相当する。This corresponds to the pulp after the third step treatment of the present invention (second invention).
実施例３
実施例２に於て熟成時間の影響を見るために熟成時間を
１５〜５時間に変化させた。結果を表−１に示す。Example 3 In Example 2, the aging time was varied from 15 to 5 hours to examine the effect of aging time. The results are shown in Table-1.
表−１から高白色度で且つ黒ヒゲの個数が少ないパルプ
を得るための条件は比較例（第１工程）では濃度１５重
量一でも効果が見られ、２５重量−以上で黒ヒゲ数の減
少が顕著である。実施例１（第２工程）では濃度１５重
及チで黒ヒゲ数は大幅に減少し約２５重量一の濃度まで
減少し続けている。しかし２５チを超えると白色度が低
下している。From Table 1, the conditions for obtaining pulp with high whiteness and a small number of black whiskers are as follows: In the comparative example (first step), an effect was seen even at a concentration of 15% by weight, and a decrease in the number of black whiskers at a concentration of 25% by weight or more. is remarkable. In Example 1 (second step), the number of black hairs decreased significantly at a density of 15 and 1, and continued to decrease to a density of approximately 25 and 1. However, when it exceeds 25 inches, the whiteness decreases.
実施例２（第３工程）に於て、低濃度叩解機で処理した
結果白色度が２〜５％増加し、黒ヒゲも減少した。実施
例３によれば、パルプ熟成時間が４時間を超えると白色
度が低下し１時間未満では黒ヒゲ減少効果は十分でない
。In Example 2 (third step), as a result of treatment with a low-concentration beating machine, the whiteness increased by 2 to 5% and black whiskers were also reduced. According to Example 3, when the pulp aging time exceeds 4 hours, the whiteness decreases, and when the pulp aging time is less than 1 hour, the effect of reducing black whiskers is not sufficient.
本発明の方法によって処理したオフセット印刷古紙を含
有する印刷古紙はすてにｍ維から離脱しているインキを
常法のフローテーション、洗浄などの処理により除去す
ることにより脱墨パルプが得られる。Deinked pulp can be obtained by removing the ink that has separated from the m-fibers from the printed waste paper containing the offset printed waste paper treated by the method of the present invention by conventional treatments such as flotation and washing.
との脱墨パルプは従来の脱墨処理では得ることが不可能
であった高白色度でかつ黒ヒゲの数の少ない高品位のも
のであり、高グレードの中級紙に配合が可能であり、原
木の節減及び二ネμギーの節減という効果を得ることが
出来る。The deinked pulp is of high quality with high whiteness and a small number of black whiskers, which was impossible to obtain with conventional deinking processing, and can be blended into high-grade intermediate paper. It is possible to obtain the effect of saving logs and two green onions.
Claims (1)
ーダ、ケイ酸ソーダ及び界面活性剤よりなる脱墨剤及び
過酸化水素漂白剤を添加し、１５重量％以上のパルプ濃
度並びに５．０ｇ／ｌ（ＮａＯＨとして）以上のアルカ
リ濃度において、加温下で圧縮力を与えながら機械的攪
拌処理を行なう工程と、該工程で処理されたパルプを０
．５時間以上熟成した後に該パルプの濃度を１５〜２５
重量％に保持し圧縮力を与えながら機械的攪拌処理を行
なう工程とを包含することを特徴とする印刷古紙の脱墨
方法。 ２、圧縮力を与えながら機械的攪拌処理を行なう手段と
してレフアイナー、ニーダー、二軸ミキサー又はデイス
パーザーを使用する特許請求の範囲第１項記載の印刷古
紙の脱墨方法。 ３、オフセット印刷古紙を含有する印刷古紙に、苛性ソ
ーダ、ケイ酸ソーダ及び界面活性剤よりなる脱墨剤及び
過酸化水素漂白剤を添加し、１５重量％以上のパルプ濃
度並びに５．０ｇ／ｌ（ＮａＯＨとして）以上のアルカ
リ濃度において、加温下で圧縮力を与えながら機械的攪
拌処理を行なう工程と、該工程で処理されたパルプを０
．５時間以上熟成した後に該パルプの濃度を１５〜２５
重量一に保持し圧縮力を与えながら機械的攪拌処理を行
なう工程と、該工程で処理されたパルプを７重量％以下
の濃度に稀釈し、更に機械的攪拌を行なう工程とを包含
することを特徴とする印刷古紙の脱墨方法。 ４、 圧縮力を与えながら機械的撹拌処理を行なう手段として
レフアイナー、ニーダー、二軸ミキサー又はデイスパー
ザーを使用する特許請求の範囲第５項記載の印刷古紙の
脱墨方法。[Claims] 1. A deinking agent consisting of caustic soda, sodium silicate, and a surfactant and a hydrogen peroxide bleaching agent are added to printed waste paper containing offset printed waste paper, and a pulp concentration of 15% by weight or more is obtained. A process of performing mechanical agitation treatment while applying compressive force under heating at an alkali concentration of 5.0 g/l (as NaOH) or more, and a process in which the pulp treated in this process is
．． After maturing for more than 5 hours, the density of the pulp is reduced to 15-25
1. A method for deinking printed waste paper, comprising a step of mechanically stirring the paper while maintaining it at % by weight and applying compressive force. 2. The method for deinking printed waste paper according to claim 1, wherein a refiner, kneader, twin-shaft mixer, or disperser is used as a means for performing mechanical agitation treatment while applying compressive force. 3. A deinking agent consisting of caustic soda, sodium silicate, and a surfactant and a hydrogen peroxide bleach are added to printing waste paper containing offset printing waste paper to achieve a pulp concentration of 15% by weight or more and 5.0g/l ( A process of performing mechanical agitation treatment while applying compressive force under heating at an alkali concentration higher than (as NaOH), and a process in which the pulp treated in this process is
．． After maturing for more than 5 hours, the density of the pulp is reduced to 15-25
The method includes a step of performing mechanical agitation treatment while maintaining the weight at the same level and applying compressive force, and a step of diluting the pulp treated in the step to a concentration of 7% by weight or less and further performing mechanical agitation. A distinctive method of deinking printed waste paper. 4. The method for deinking printed waste paper according to claim 5, wherein a refiner, kneader, twin-shaft mixer, or disperser is used as a means for performing mechanical agitation treatment while applying compressive force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61171872A JPS6328992A (en) | 1986-07-23 | 1986-07-23 | Deinking of old printed paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61171872A JPS6328992A (en) | 1986-07-23 | 1986-07-23 | Deinking of old printed paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6328992A true JPS6328992A (en) | 1988-02-06 |
| JPH048554B2 JPH048554B2 (en) | 1992-02-17 |
Family
ID=15931355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61171872A Granted JPS6328992A (en) | 1986-07-23 | 1986-07-23 | Deinking of old printed paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6328992A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02221480A (en) * | 1989-02-23 | 1990-09-04 | Honshu Paper Co Ltd | Method for deinking printed waste paper |
| JPH04333682A (en) * | 1991-05-10 | 1992-11-20 | Sanyo Kokusaku Pulp Co Ltd | Method for deinking toner-printed waste paper |
| US5370770A (en) * | 1992-11-09 | 1994-12-06 | The Mead Corporation | Method for deinking printed waste paper using soybean peroxidase |
| JP2010502847A (en) * | 2006-08-31 | 2010-01-28 | ケイエクス テクノロジーズ エルエルシー | Method for producing fibrillated fibers |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5352704A (en) * | 1976-10-19 | 1978-05-13 | Masashi Kobayashi | Process for regenerating printed paper |
| JPS58126388A (en) * | 1982-01-14 | 1983-07-27 | ヨツト エム フオイト ゲーエムベーハー | Process for producing fibrous stock material from used paper |
| JPS6111353A (en) * | 1984-06-18 | 1986-01-18 | 太田 範子 | Magnet stopper |
| JPS6260515A (en) * | 1985-09-09 | 1987-03-17 | 松下電工株式会社 | Electromotive toothbrush |
-
1986
- 1986-07-23 JP JP61171872A patent/JPS6328992A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5352704A (en) * | 1976-10-19 | 1978-05-13 | Masashi Kobayashi | Process for regenerating printed paper |
| JPS58126388A (en) * | 1982-01-14 | 1983-07-27 | ヨツト エム フオイト ゲーエムベーハー | Process for producing fibrous stock material from used paper |
| JPS6111353A (en) * | 1984-06-18 | 1986-01-18 | 太田 範子 | Magnet stopper |
| JPS6260515A (en) * | 1985-09-09 | 1987-03-17 | 松下電工株式会社 | Electromotive toothbrush |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02221480A (en) * | 1989-02-23 | 1990-09-04 | Honshu Paper Co Ltd | Method for deinking printed waste paper |
| JPH0423037B2 (en) * | 1989-02-23 | 1992-04-21 | Honshu Paper Co Ltd | |
| JPH04333682A (en) * | 1991-05-10 | 1992-11-20 | Sanyo Kokusaku Pulp Co Ltd | Method for deinking toner-printed waste paper |
| US5370770A (en) * | 1992-11-09 | 1994-12-06 | The Mead Corporation | Method for deinking printed waste paper using soybean peroxidase |
| JP2010502847A (en) * | 2006-08-31 | 2010-01-28 | ケイエクス テクノロジーズ エルエルシー | Method for producing fibrillated fibers |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH048554B2 (en) | 1992-02-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |