JPS6399396A - Production of filled paper - Google Patents
Production of filled paperInfo
- Publication number
- JPS6399396A JPS6399396A JP24197186A JP24197186A JPS6399396A JP S6399396 A JPS6399396 A JP S6399396A JP 24197186 A JP24197186 A JP 24197186A JP 24197186 A JP24197186 A JP 24197186A JP S6399396 A JPS6399396 A JP S6399396A
- Authority
- JP
- Japan
- Prior art keywords
- pigment
- paper
- raw material
- composite particles
- cellulose raw
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000000049 pigment Substances 0.000 claims description 94
- 239000001913 cellulose Substances 0.000 claims description 38
- 229920002678 cellulose Polymers 0.000 claims description 38
- 239000002994 raw material Substances 0.000 claims description 38
- 239000011246 composite particle Substances 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 238000010298 pulverizing process Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 9
- 238000007796 conventional method Methods 0.000 claims description 4
- 239000000123 paper Substances 0.000 description 72
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 39
- 235000010980 cellulose Nutrition 0.000 description 36
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 22
- 239000002245 particle Substances 0.000 description 20
- 229910000019 calcium carbonate Inorganic materials 0.000 description 19
- 239000004408 titanium dioxide Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 3
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 3
- 239000000454 talc Substances 0.000 description 3
- 229910052623 talc Inorganic materials 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 description 2
- 229910000020 calcium bicarbonate Inorganic materials 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003623 enhancer Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 229920000168 Microcrystalline cellulose Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000010062 adhesion mechanism Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000008108 microcrystalline cellulose Substances 0.000 description 1
- 235000019813 microcrystalline cellulose Nutrition 0.000 description 1
- 229940016286 microcrystalline cellulose Drugs 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Landscapes
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- 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】
魔呈上■肌■分立
本発明は、抄紙に際して紙料に添加した顔料の歩留りが
高く、かつ顔料による祇の強度低下の小さい充填紙の製
造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing filled paper that has a high yield of pigments added to the paper stock during paper making and that reduces the decrease in strength of the paper due to the pigments.
鴛】ｑＬ避
従来、印刷用紙の製造において、紙の白色度、不透明度
、印刷通性等を向上させることを主な目的として、炭酸
カルシウム、カオリン、クレー、タルク、二酸化チタン
、プラスチックピグメントのような種々の顔料が使用さ
れている。Traditionally, in the production of printing paper, chemicals such as calcium carbonate, kaolin, clay, talc, titanium dioxide, and plastic pigments have been used to improve the paper's whiteness, opacity, printability, etc. A variety of pigments are used.
また、最近では新聞用紙の製造においても同様の目的の
ために、また、その他加工原紙や板紙の分野などにおい
ても種々の目的をもって上記顔料が使用されている。な
お、顔料の使用は、上記に加えて、セルロース原料のみ
で抄紙した場合に比べて紙の乾燥強度を向上して乾燥の
ためのエネルギーコストを低減させることも可能であり
、さらに、セルロース原料より安価な顔料を増量剤とし
て使用することにより原料コストの低下にも役立つもの
である。Recently, the above-mentioned pigments have been used for the same purpose in the production of newsprint, as well as for various purposes in the fields of processed base paper and paperboard. In addition to the above, the use of pigments can also improve the dry strength of paper and reduce the energy cost for drying compared to paper made only from cellulose raw materials. The use of inexpensive pigments as extenders also helps reduce raw material costs.
しかし、紙料への顔料の添加、使用は、上述したごとき
利点があるものの、い（つかの問題点もみられる。However, although the addition and use of pigments to paper stocks has the above-mentioned advantages, there are also some problems.
その第一の問題は、顔料の添加量が増加するに伴い、得
られる紙の強度が大きく低下することであり、第二の問
題は顔料の紙中への定着率が悪く、大部分が白水中に流
出してしまうことである。The first problem is that as the amount of pigment added increases, the strength of the resulting paper decreases significantly, and the second problem is that the fixation rate of the pigment in the paper is poor, and most of the white water The problem is that it leaks inside.
従来、これらの問題点を改善するために、祇の強度を向
上させる紙力増強剤や顔料の歩留りを高める歩留り向上
剤等の薬品が用いられている。Conventionally, in order to improve these problems, chemicals such as a paper strength enhancer that improves the strength of paper and a retention improver that increases the retention of pigments have been used.
而して、これらの薬品の添加は、顔料をセルロース原料
スラリーに添加した後の抄紙時及び紙層内部でのセルロ
ース原料間或はセルロース原料と顔料間の結合を強化す
ることを目的としたものであって、セルロース原料スラ
リーに添加する前の顔料に対して施される処理でないの
で顔料の本質的な歩留り向上にはならない。Therefore, the purpose of adding these chemicals is to strengthen the bond between the cellulose raw materials or between the cellulose raw material and the pigment during paper making and within the paper layer after the pigment is added to the cellulose raw material slurry. However, since this treatment is not performed on the pigment before it is added to the cellulose raw material slurry, it does not essentially improve the yield of the pigment.
また、顔料の性質と、顔料の歩留り及び紙の強度との関
係からすると、特に顔料粒子径の影響が大きく、一般に
、顔料の粒径が大きいほど顔料添加による紙強度の低下
が小さく、紙中への定着率も高いことから、顔料を予め
凝集させて適当な大きさにした後、セルロース原料スラ
リーに添加する方法が知られている。In addition, considering the relationship between pigment properties, pigment yield, and paper strength, the influence of the pigment particle size is particularly large. Since the rate of fixation on cellulose is also high, a method is known in which the pigment is agglomerated in advance to an appropriate size and then added to the cellulose raw material slurry.
例えば、顔料スラリーに合成高分子電解質を添加して２
０μｍ〜２０ｍｍの顔料フロックを形成させた後、セル
ロース原料スラリーに添加する方法ＣＭ。For example, by adding a synthetic polymer electrolyte to a pigment slurry,
A method CM in which pigment flocs of 0 μm to 20 mm are formed and then added to cellulose raw material slurry.
Ｃ，Ｒｉｄｄｅｌｌ ａｎｄ ＩＪａｒｉｎｇ ； ｒ
ペーパーテクノロジイ エンドインダストリイＪ （Ｐ
ａｐｅｒ Ｔｅｃｈｎｏｌｏｇｙａｎｄ Ｉｎｄｕｓｔ
ｒｙ） １７ ｆ２） ７６ （１９７６））が報告さ
れている。しかし、この方法で形成された顔料フロック
は、強い水力学的剪断力のもとでは容易に破壊されてし
まうので、強い水力学的剪断力のかからない段階で顔料
を添加しなければならないという添加上の制限があるほ
か、最近の高速、高生産性の抄紙機においてはそのワイ
ヤ一部での脱水の際に顔料フロックが破壊されてしまう
こともあるという問題もある。C, Riddell and I Jaring; r
Paper Technology End Industry J (P
aper Technology and Industry
ry) 17 f2) 76 (1976)) has been reported. However, the pigment flocs formed by this method are easily destroyed under strong hydraulic shearing forces, so the additive process requires that the pigment be added at a stage where strong hydraulic shearing forces are not applied. In addition to these limitations, there is also the problem that in recent high-speed, high-productivity paper machines, pigment flocs may be destroyed during dewatering at a portion of the wire.
さらに、上記方法のほかに、紙の不透明度や白色度を高
める目的で顔料を水中に分散した後、Ｉ）Ｉ＋調整もし
くは無機、有機の凝集剤の添加により顔料を凝集させ、
さらに、これを脱水乾燥後、適当な粒径にまで粉砕して
０．５μｍ〜１００μ謂の顔料凝集粒子を得る方法（特
公昭５７−１３６８０号）も提案されている。しかし、
この方法は顔料の凝集粒子を得るための操作が煩雑であ
って実用性に乏しい。Furthermore, in addition to the above method, after dispersing the pigment in water for the purpose of increasing the opacity and whiteness of the paper, the pigment is aggregated by I) I+ adjustment or the addition of an inorganic or organic flocculant;
Furthermore, a method has been proposed (Japanese Patent Publication No. 13680/1983) in which the pigment is dehydrated and dried and then pulverized to a suitable particle size to obtain pigment agglomerated particles of 0.5 μm to 100 μm. but,
This method requires complicated operations to obtain agglomerated pigment particles, and is therefore impractical.
発■が解決しようとする課題
本発明は、顔料を紙料に添加して抄紙する充填紙の製造
において、顔料を予め凝集させる等の手間を要したり、
また、顔料の添加段階が制限される等の欠点を伴うこと
なく、抄紙時の顔料の歩留りが高く、しかも顔料の添加
による紙の強度低下が非常に小さい充填紙の製造方法を
提供することをｉ！１！題とする。Problems to be Solved by the Present Invention The present invention solves the problem that, in the production of filled paper in which pigments are added to paper stock, it is difficult to make the pigments coagulate beforehand.
Another object of the present invention is to provide a method for producing filled paper that has a high pigment yield during paper making without having drawbacks such as restrictions on the pigment addition stage, and in which the strength of the paper decreases very little due to the addition of the pigment. i! 1! The subject is
以下本発明の詳細な説明する。The present invention will be explained in detail below.
立凱■盪底
本発明の特徴は、製紙用顔料とセルロース原料を混合粉
砕し、この粉砕混合物を、常法により調製した紙料に添
加して抄紙する充填紙の製造方法にある。The present invention is characterized by a method for manufacturing filled paper, which involves mixing and pulverizing a papermaking pigment and a cellulose raw material, and adding this pulverized mixture to a paper stock prepared by a conventional method to make paper.
課 を解ン１するための手
上述のとおり、本発明は、顔料をセルロース原料と混合
して粉砕することにより得られる粉砕混合物を紙料に添
加することを特徴とするものであるが、本発明者らは、
顔料をセルロース原料と混合粉砕すると、セルロース原
料が粉砕されると同時に、顔料の少くとも一部が粉砕さ
れたセルロース原料粒子の表面に付着したり、セルロー
ス原料粒子の内部にまで入り込んで顔料とセルロース原
料の複合粒子が形成され、この複合粒子は水中に分散し
ても容易に破壊されないことを見出した。As mentioned above, the present invention is characterized in that a pulverized mixture obtained by mixing a pigment with a cellulose raw material and pulverizing the mixture is added to the paper stock. The inventors
When a pigment is mixed and pulverized with a cellulose raw material, the cellulose raw material is pulverized and at the same time, at least a part of the pigment adheres to the surface of the pulverized cellulose raw material particles or penetrates into the inside of the cellulose raw material particles, causing the pigment and cellulose to be mixed. It has been found that composite particles of the raw material are formed and that the composite particles are not easily destroyed when dispersed in water.
すなわち、上記複合粒子ではセルロース原料が接着剤の
ように作用して顔料の凝集粒子が形成されているものと
考えられる。That is, in the composite particles described above, it is considered that the cellulose raw material acts like an adhesive to form aggregated pigment particles.
通常、顔料の紙中への定着は、（１）共凝集、すなわち
紙料中のセルロース原料への顔料粒子の付着機構と（２
）紙料中のセルロース原料による顔料粒子の濾過機構に
より支配され、本発明による顔料の歩留り向上は後者の
機構に負うものであり、主として前者の機構による効果
をねらう硫酸バンド、合成高分子物質、天然高分子物質
等の歩留り向上剤の使用は本発明の効果をなんら阻害す
るものでなく、本発明の方法と歩留り向上剤の併用は効
果をさらに高めるものである。また、紙力増強剤等の抄
紙薬品についても同様である。Usually, the fixation of pigments in paper involves (1) co-aggregation, that is, the adhesion mechanism of pigment particles to the cellulose raw material in paper stock, and (2)
) It is dominated by the filtration mechanism of pigment particles by the cellulose raw material in the paper stock, and the improvement in pigment yield according to the present invention is due to the latter mechanism. The use of a retention aid such as a natural polymer substance does not impede the effects of the present invention in any way, and the combined use of the method of the present invention and a retention aid further enhances the effect. The same applies to papermaking chemicals such as paper strength enhancers.
したがって、本発明は印刷用紙、新聞用紙などの各種紙
、および板紙に十分適用できる。Therefore, the present invention is fully applicable to various papers such as printing paper and newsprint, and paperboard.
本発明において、顔料とセルロース原料を混合粉砕する
に当っては、用いる粉砕機は特に限定されないが、セル
ロース原料がシート状あるいは繊維状である場合は、ロ
ッドミルのようなセルロース原料を微粉砕できるものが
よく、セルロース原料がすでに微粒子状態である場合、
例えば、セルロース原料を予め微粉砕したもの、柔細胞
粒子、微結晶性セルロースの場合には自動乳鉢を用い得
る。In the present invention, when mixing and pulverizing the pigment and cellulose raw material, the pulverizer used is not particularly limited, but if the cellulose raw material is in the form of a sheet or fiber, a machine such as a rod mill that can finely pulverize the cellulose raw material is used. If the cellulose raw material is already in a fine particle state,
For example, in the case of a cellulose raw material that has been finely ground in advance, soft cell particles, or microcrystalline cellulose, an automatic mortar may be used.
また、上記混合粉砕に際しての顔料とセルロース原料と
の混合割合は、特に制限されないが、顔料／セルロース
原料の比率が４０／６０以上が好ましい。すなわち、混
合粉砕により形成される複合粒子中の顔料分が４０％以
上にすることが好ましい。Further, the mixing ratio of the pigment and the cellulose raw material during the mixing and pulverization is not particularly limited, but the pigment/cellulose raw material ratio is preferably 40/60 or more. That is, it is preferable that the pigment content in the composite particles formed by mixing and pulverization is 40% or more.
一方、複合粒子中の顔料分が４０％以下になると、顔料
の歩留りは高くなるものの、粉砕されたセルロース原料
粒子は、常法により調製される紙料中のセルロース原料
に比べて、抄造して得られる紙中での強度発現効果が小
さいため、顔料をそのまま添加した場合と同じ顔料含有
率で比較した場合、紙の強度が低くなるので好ましくな
い。On the other hand, when the pigment content in the composite particles is 40% or less, although the pigment yield is high, the pulverized cellulose raw material particles are less than the cellulose raw materials in the paper stock prepared by conventional methods. Since the effect of developing strength in the obtained paper is small, the strength of the paper becomes lower when compared with the case where the pigment is added as it is at the same pigment content, which is not preferable.
なお、上記混合粉砕により得られる複合粒子の大きさは
０．５μｍ〜１００μｍであって、そのままもしくは風
ヒもしくは水ヒによって分級した後、紙料に添加して用
いる。The composite particles obtained by the above-mentioned mixing and pulverization have a size of 0.5 μm to 100 μm, and are used as they are or after being classified by wind or water heat and added to paper stock.
本発明で用いる顔料としては、重炭酸カルシウム、沈降
性炭酸カルシウム、カオリン、クレー、。Pigments used in the present invention include calcium bicarbonate, precipitated calcium carbonate, kaolin, and clay.
タルク、二酸化チタン、プラスチックピグメント等を例
示し得、重炭酸カルシウムやタルクのような比較的粒径
の大きい顔料は、セルロース原料との混合粉砕時にはそ
れ自体も粉砕された状態で複合化される。Examples include talc, titanium dioxide, and plastic pigments. Pigments with relatively large particle sizes such as calcium bicarbonate and talc are themselves pulverized into a composite when mixed and pulverized with cellulose raw materials.
また、これらの顔料と混合粉砕するのに用いるセルロー
ス原料としては、未漂白もしくは漂白された植物繊維原
料、古紙バルブ、結晶性セルロース等を例示し得るが、
白色度が特に問題とされる充填紙の製造では、顔料と同
程度かそれ以上の白色度を有するものが好ましい。また
、顔料との混合粉砕によって容易に粉砕される程度に乾
燥されているものがよく、好ましくは含有水分が２０％
以下のものがよい。なお、−ｍに用いられる製紙用セル
ロース原料は、乾燥したシート状で供給されるので、予
め一片が２〜３ｃＩ１１の大きさに粗砕した後、顔料と
混合粉砕するとよい。In addition, examples of cellulose raw materials used for mixing and pulverizing with these pigments include unbleached or bleached vegetable fiber raw materials, waste paper bulbs, crystalline cellulose, etc.
In the production of filled paper where whiteness is a particular issue, it is preferable to use a material with a whiteness comparable to or higher than that of the pigment. Also, it should be dried to the extent that it can be easily pulverized by mixing and pulverizing with pigments, and preferably has a water content of 20%.
The following are good. In addition, since the cellulose raw material for paper manufacturing used in -m is supplied in the form of a dry sheet, it is preferable to crush it in advance to a size of 2 to 3 cI11, and then mix it with the pigment and crush it.
上述のごと＜、顔料とセルロース原料は通常、乾燥状態
で混合して粉砕されるが、若干の水を存在させて湿潤状
態で混合粉砕することも可能である。As mentioned above, the pigment and the cellulose raw material are usually mixed and pulverized in a dry state, but it is also possible to mix and pulverize them in a wet state in the presence of some water.
次に、本発明に従って、顔料として０．３μｍの炭酸カ
ルシウム並びに０．２μｍの二酸化チタンを用い、これ
らの各顔料を、−片を２〜３ｃｍの大きさに粗砕したＬ
ＢＫＰドライシート（水分８．６％）と絶乾重量で８１
７１９の割合で混合し、ロードミル（手工製作所、Ｔｌ
−１００）を用いて２０分間粉砕して得られた複合粒子
中の炭酸カルシウム量並びに二酸化チタン量を測定した
結果を第１表に示“す。なお、上記複合粒子中セルロー
ス原料と複合化していない各顔料粒子を、スタラーで５
分間もしくは超音波で５分間分散した後、５μｍの篩で
脱イオン水を流して水ヒを行うことにより除去したので
５μｍより小さい複合粒子も複合化していない顔料と共
に除去されており、従って、上記測定結果は５μｍより
大きい複合粒子中の顔料分を測定したことになる。顔料
分の測定は沃化法により行った。Next, according to the present invention, calcium carbonate of 0.3 μm and titanium dioxide of 0.2 μm were used as pigments, and each of these pigments was crushed into pieces of L having a size of 2 to 3 cm.
BKP dry sheet (moisture 8.6%) and bone dry weight: 81
Mix at a ratio of 719 to
Table 1 shows the results of measuring the amounts of calcium carbonate and titanium dioxide in the composite particles obtained by crushing the composite particles for 20 minutes using Stir each pigment particle with a stirrer for 5
After dispersing for 5 minutes or using ultrasound for 5 minutes, deionized water was passed through a 5 μm sieve to remove the composite particles, and the composite particles smaller than 5 μm were also removed together with the uncomplexed pigments. The measurement results indicate that the pigment content in composite particles larger than 5 μm was measured. The pigment content was measured by the iodization method.
第１表
１）スターシー５分間分散
２）超音波５分間分散
３）分散時にポリアクリル酸ソーダを０．６％添加第１
表にみられるとおり、本発明による混合粉砕によって、
顔料分を４０％以上含む複合粒子が容易に形成されるこ
とがわかる。また、スターラーで５分間分散した場合と
、超音波で５分間分散した場合で複合化している顔料粒
量にほとんど差がみられないことから、形成された複合
粒子が製紙工程での水力学的剪断力のもとでも容易に破
壊されることがなく、したがって、該複合粒子の紙料へ
の添加段階も制限されない。Table 1 1) Starcy 5 minute dispersion 2) Ultrasonic 5 minute dispersion 3) Addition of 0.6% sodium polyacrylate during dispersion 1st
As seen in the table, by the mixed grinding according to the present invention,
It can be seen that composite particles containing 40% or more of the pigment content are easily formed. In addition, there is almost no difference in the amount of pigment particles composited when dispersed for 5 minutes using a stirrer and when dispersed for 5 minutes using ultrasonic waves. They are not easily broken even under shear forces, and therefore the stage of addition of the composite particles to the paper stock is not restricted either.
光肌旦丈施■点四果
以下実施例を示して本発明とその効果を具体的に説明す
る。The present invention and its effects will be specifically explained with reference to Examples below.
実施例１
直径約０．３ｎ＋ｆｆｉの炭酸カルシウムと一片が２−
３ｃｍの大きさに粗砕したＬＢＫＰドライシート（水分
８．６％）を絶乾重量で８１ ： １９の割合で混合し
、ロッドミル（＠手工製作所、Ｔｌ−１００）で２０分
間粉砕した。Example 1 Calcium carbonate with a diameter of about 0.3n+ffi and a piece of 2-
LBKP dry sheets (moisture 8.6%) coarsely crushed to a size of 3 cm were mixed at a ratio of 81:19 (bone dry weight) and crushed for 20 minutes with a rod mill (@Teiko Seisakusho, Tl-100).
粉砕後、２５μｍの篩で２５μ請以上の粒子を除去した
。得られた炭酸カルシウムとＬＢＫＰの複合粒子を含む
混合粉砕物の平均粒径は、コールタ−カウンターで測定
したところ１２．７μｍであった。別に、上記ＬＢＫＰ
ドライシートをＴＡＰＰＩ標準離解機で離解したのちパ
ルプ濃度１０％でフリーネス（カナダ標準フリーネス）
４００ｍｊ！になるまでＰＦｒミルで叩解し、この叩解
パルプと混合粉砕物を１００ ： ５０の割合で混合し
、ＪＩＳ Ｐ８２０９に従って坪量６０ｇ／ｒ／の祇を
手抄きした。得られた手抄き祇について、顔料歩留り、
紙質試験結果を第２表に示す。また、複合粒子を含む混
合粉砕物をスターラーで５分間分散したのち、５μ麟の
篩で脱イオン水を流して水ヒすることにより、セルロー
ス原料と複合化していない炭酸カルシウム粒子を除去し
、５μｍ以上の複合粒子中の炭酸カルシウムを灰分法で
求めた結果を複合粒子中の顔料分として第２表に併記す
る。After pulverization, particles larger than 25 μm were removed using a 25 μm sieve. The average particle size of the resulting mixed pulverized product containing composite particles of calcium carbonate and LBKP was 12.7 μm as measured with a Coulter counter. Separately, the above LBKP
After disintegrating the dry sheet with a TAPPI standard disintegrator, it becomes free at a pulp concentration of 10% (Canadian standard freeness)
400mj! The pulp was beaten in a PFr mill until it had a pulp, and the beaten pulp and the mixed pulverized product were mixed in a ratio of 100:50, and hand-made into paper with a basis weight of 60 g/r/ in accordance with JIS P8209. Regarding the obtained handmade paper, pigment yield,
The paper quality test results are shown in Table 2. In addition, after dispersing the mixed pulverized material containing composite particles with a stirrer for 5 minutes, deionized water was passed through a 5 μm sieve to remove calcium carbonate particles that were not composited with the cellulose raw material. The results of determining the calcium carbonate in the above composite particles using the ash method are also listed in Table 2 as the pigment content in the composite particles.
実施例２
混合粉砕時の、炭酸カルシウムとＬＢＫＰドライシート
の混合割合を６７ ： ３３とすることと、叩解パルプ
と複合粒子を含む混合粉砕物の混合割合を ′１００
： ３３とすることの他は、実施例１と全く同様にして
手抄き祇を得た。添加した混合粉砕物の平均粒径は１３
．３μｍであった。得られた手抄き紙について、顔料歩
留り、紙質試験結果を第２表に示す。また、前述の方法
と全く同様にして、５μｍ以上の複合粒子中の炭酸カル
シウム分を求めた結果を複合粒子中の顔料分として第２
表に併記する。Example 2 During mixing and pulverization, the mixing ratio of calcium carbonate and LBKP dry sheet was 67:33, and the mixing ratio of the mixed pulverized product containing beaten pulp and composite particles was 100:1.
: A handmade paper was obtained in exactly the same manner as in Example 1 except that the number was 33. The average particle size of the added mixed pulverized material was 13
．． It was 3 μm. Table 2 shows the pigment yield and paper quality test results for the obtained handmade paper. In addition, the calcium carbonate content in the composite particles of 5 μm or more was determined in exactly the same manner as the above method, and the pigment content in the composite particles was determined as the second
Also listed in the table.
比較例１
直径０．３μｍの炭酸カルシウムを、ポリアクリル酸ソ
ーダを０．４％（対炭酸カルシウム）加えて水に分散し
た。実施例１と同様にしてフリーネス４００ｔｓ ｌま
で叩解したＬＢＫＰと炭酸カルシウムを１００ ： １
００の割合で混合し、ＪＩＳ Ｐ８２０９に従って坪ｆ
ｆ１６０ｇ／ｌｒｒの紙を手抄きした。得られた手抄き
紙について、顔料歩留り、祇Ｍ試験結果を第２表に示す
。Comparative Example 1 Calcium carbonate having a diameter of 0.3 μm was dispersed in water by adding 0.4% (based on calcium carbonate) of sodium polyacrylate. LBKP beaten to a freeness of 400 tsl in the same manner as in Example 1 and calcium carbonate were mixed in a ratio of 100:1.
Mix at a ratio of 0.00 and tsubo f according to JIS P8209.
Paper of f160g/lrr was made by hand. Table 2 shows the pigment yield and the M test results for the obtained handmade paper.
第２表
実施例３
顔料として平均粒径５．２μ州の炭酸カルシウムを用い
、混合粉砕時の炭酸カルシウムとＬＢＫＰの混合割合を
９５＝５とすることと、叩解パルプと複合粒子を含む混
合粉砕物の混合割合を１００ ： ３０とする他は、実
施例１と全く同様にして手抄きシートを得た。走査型電
子顕微鏡で複合粒子を観察したところ、炭酸カルシウム
は１μｍ前後に粉砕されてセルロース原料と複合化して
いることを確認した。Table 2 Example 3 Calcium carbonate with an average particle size of 5.2 μm was used as the pigment, the mixing ratio of calcium carbonate and LBKP during mixing and pulverization was 95=5, and mixed pulverization containing beaten pulp and composite particles. A handmade sheet was obtained in exactly the same manner as in Example 1, except that the mixing ratio was 100:30. When the composite particles were observed with a scanning electron microscope, it was confirmed that the calcium carbonate was pulverized to about 1 μm and composited with the cellulose raw material.
得られた手抄き祇について、顔料歩留り、紙質試験結果
を第３表に示す。また、前述の方法と全く同様にして、
５μ讃以上の複合粒子中の炭酸カルシウム分を求めた結
果を複合粒子中の顔料分として第３表に併記する。Table 3 shows the pigment yield and paper quality test results for the obtained handmade paper. Also, in exactly the same way as the above method,
The results of calculating the calcium carbonate content in the composite particles of 5 μm or more are also listed in Table 3 as the pigment content in the composite particles.
比較例２
平均粒径５．２μ−の炭酸カルシウムを、ポリアクリル
酸ソーダを０．４％（対炭酸カルシウム）に加えて水に
分散した。叩解パルプと炭酸カルシウムを１００ ：
１００の割合で混合する他は、比較例１と全く同様にし
て手抄き祇を得た。得られた手抄き祇について、顔料歩
留り、紙質試験結果を第３表に示す。Comparative Example 2 Calcium carbonate having an average particle size of 5.2 μm was dispersed in water with the addition of 0.4% sodium polyacrylate (based on calcium carbonate). Beaten pulp and calcium carbonate 100%:
A handmade paper was obtained in exactly the same manner as in Comparative Example 1 except that the mixture was mixed at a ratio of 100%. Table 3 shows the pigment yield and paper quality test results for the obtained handmade paper.
第３表
実施例４
顔料として直径０．２μｍの二酸化チタンを用いる他は
、実施例１と全く同様にして手抄き祇を得た。得られた
手抄き祇について、顔料歩留り、紙質試験結果を第４表
に示す。また、前述の方法と全く同様にして、５μｍ以
上の複合粒子中の二酸化チタン分を求めた結果を複合粒
子中の顔料分として第４表に併記する。Table 3 Example 4 A handmade paper was obtained in exactly the same manner as in Example 1 except that titanium dioxide with a diameter of 0.2 μm was used as the pigment. Table 4 shows the pigment yield and paper quality test results for the obtained handmade paper. In addition, the titanium dioxide content in the composite particles of 5 μm or more was determined in exactly the same manner as the method described above, and the results are also listed in Table 4 as the pigment content in the composite particles.
実施例５
顔料として直径０．２μｍの二酸化チタンを用い、二酸
化チタンとＬＢＫＰドライシートの混合割合を３２ ：
６８とすることと、叩解パルプと複合粒子を含む混合
粉砕物の混合割合を１００７１４とすることの他は、実
施例１と全く同様にして手抄き祇を得た。Example 5 Titanium dioxide with a diameter of 0.2 μm was used as a pigment, and the mixing ratio of titanium dioxide and LBKP dry sheet was 32:
A handmade paper was obtained in exactly the same manner as in Example 1, except that the mixing ratio of the mixed pulverized material containing the beaten pulp and composite particles was 100,714.
得られた手抄き紙について、顔料歩留り、紙質試験結果
を第４表に示す。また、前述の方法と全く同様にして、
５μｍ以上の複合粒子中の二酸化チタン分を求めた結果
を複合粒子中の顔料分として第４表に併記する。Table 4 shows the pigment yield and paper quality test results for the obtained handmade paper. Also, in exactly the same way as the above method,
The results of determining the titanium dioxide content in the composite particles of 5 μm or more are also listed in Table 4 as the pigment content in the composite particles.
比較例３
、直径０．２μｍの二酸化チタンを水に分散し、叩解パ
ルプと二酸化チタンを１００ ： ７０の割合で混合す
る他は、比較例１と全く同様にしてて抄き祇を得た。得
られた手抄き祇について、顔料歩留り、紙質試験結果を
第４表に示す。Comparative Example 3 A shogi was obtained in exactly the same manner as in Comparative Example 1, except that titanium dioxide having a diameter of 0.2 μm was dispersed in water, and the beaten pulp and titanium dioxide were mixed at a ratio of 100:70. Table 4 shows the pigment yield and paper quality test results for the obtained handmade paper.
第４表
上記に示した第２表乃至第４表にみられるとおり、本発
明による各実施例の結果はいずれも比較例に比べて顔料
の歩留りが高く、紙中の灰分が多いにもかかわらず、紙
の強度が高いことがわかる。Table 4 As shown in Tables 2 to 4 shown above, the results of each example according to the present invention are that the yield of pigment is higher than that of the comparative example, and even though the ash content in the paper is high. First, it can be seen that the strength of the paper is high.
なお、実施例５は、前述の方法により測定した５μｍ以
上の大きさの複合粒子中の顔料分が４０％以下であるた
め、顔料歩留り自体が高いが紙の強度に対する効果は明
らかでない。In Example 5, the pigment content in the composite particles with a size of 5 μm or more measured by the method described above is 40% or less, so although the pigment yield itself is high, the effect on the strength of the paper is not clear.
以上述べたとおり、本発明は、顔料をセルロース原料と
混合粉砕したものを、常法により叩解したパルプのよう
なセルロース原料を主とした紙料に添加して抄紙すると
いう簡単な操作により、顔料の歩留りが高く、しかも紙
の強度低下の小さい顔料を添加した充填紙を製造し得る
利点を有するものである。なお、本発明によると、紙中
の顔料含有量を一層増加させても紙の強度が余り低下し
ないので上記顔料含有量を増加させることが可能となる
利点もある。As described above, the present invention allows the pigment to be mixed and pulverized with a cellulose raw material, and then added to a paper stock mainly composed of a cellulose raw material such as beaten pulp using a conventional method to make paper. This method has the advantage of being able to produce filled paper containing pigments with a high yield and a small decrease in paper strength. Furthermore, according to the present invention, even if the pigment content in the paper is further increased, the strength of the paper does not decrease much, so there is an advantage that the pigment content can be increased.
Claims (3)
粉砕混合物を、常法により調製した紙料に添加して抄紙
することを特徴とする充填紙の製造方法。(1) A method for manufacturing filled paper, which comprises mixing and pulverizing a papermaking pigment and a cellulose raw material, and adding this pulverized mixture to a paper stock prepared by a conventional method to make paper.
ルロース原料との複合粒子を形成している特許請求の範
囲第（１）項記載の製造方法。(2) The production method according to claim (1), wherein at least a part of the pulverized mixture forms composite particles of the pigment and the cellulose raw material.
分が４０％以上である特許請求の範囲第（２）項記載の
製造方法。(3) The manufacturing method according to claim (2), wherein the pigment content in the composite particles formed by the mixing and pulverization is 40% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24197186A JP2618231B2 (en) | 1986-10-14 | 1986-10-14 | Manufacturing method of filled paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24197186A JP2618231B2 (en) | 1986-10-14 | 1986-10-14 | Manufacturing method of filled paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6399396A true JPS6399396A (en) | 1988-04-30 |
| JP2618231B2 JP2618231B2 (en) | 1997-06-11 |
Family
ID=17082307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24197186A Expired - Fee Related JP2618231B2 (en) | 1986-10-14 | 1986-10-14 | Manufacturing method of filled paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2618231B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63135593A (en) * | 1986-11-18 | 1988-06-07 | 株式会社日本紙パルプ研究所 | Composite particle of heavy calcium carbonate and cellulose raw material and its pormation |
| JP2007098255A (en) * | 2005-10-04 | 2007-04-19 | Sumitomo Bakelite Co Ltd | Method for preparing ground fiber, ground fiber, resin molding material, and molded article |
-
1986
- 1986-10-14 JP JP24197186A patent/JP2618231B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63135593A (en) * | 1986-11-18 | 1988-06-07 | 株式会社日本紙パルプ研究所 | Composite particle of heavy calcium carbonate and cellulose raw material and its pormation |
| JP2007098255A (en) * | 2005-10-04 | 2007-04-19 | Sumitomo Bakelite Co Ltd | Method for preparing ground fiber, ground fiber, resin molding material, and molded article |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2618231B2 (en) | 1997-06-11 |
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