JPH0672394B2 - Manufacturing method of paper with internal filler - Google Patents
Manufacturing method of paper with internal fillerInfo
- Publication number
- JPH0672394B2 JPH0672394B2 JP13266487A JP13266487A JPH0672394B2 JP H0672394 B2 JPH0672394 B2 JP H0672394B2 JP 13266487 A JP13266487 A JP 13266487A JP 13266487 A JP13266487 A JP 13266487A JP H0672394 B2 JPH0672394 B2 JP H0672394B2
- Authority
- JP
- Japan
- Prior art keywords
- filler
- paper
- added
- bacterial cellulose
- opacity
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 （Ａ）産業上の利用分野 本考案は填料を内添した紙の製造方法に関し、更に詳し
くは不透明性および強度のすぐれた填料内添紙の製造方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a method for producing a paper with a filler internally added, and more particularly to a method for producing a paper with a filler having excellent opacity and strength. .
（Ｂ）従来の技術 通常、印刷あるいは筆記用に使用される紙には、不透明
性、白色度、平滑性、手触り、筆記性、印刷適正等の改
良を目的として填料が添加されている。この様な填料を
内添した紙の製造方法としては、水に分散したパルプ
に、填料を添加し、その他紙の抄造に通常用いられる内
添助剤を添加した紙料から、長網抄紙機あるいは、ツイ
ンワイヤー抄紙機等によって湿紙を形成し、乾燥する方
法が従来から知られている。これらの内添填料はパルプ
繊維間の密着を防げ、散乱比表面積を増加させ、あるい
は屈曲率の違いによる散乱効率の増加によって、不透明
性の向上をもたらすが、最近、紙の軽量化、パルプの制
約、さらに高まる製品品質要求への対処などに関連し
て、填料をより効果的に、より多く使用することの重要
性が増してきた。(B) Conventional Technique A filler is usually added to paper used for printing or writing for the purpose of improving opacity, whiteness, smoothness, touch, writing property, printability and the like. As a method for producing paper with such a filler added internally, a filler dispersed in water is added with a filler, and a paper stock prepared by adding an auxiliary additive which is usually used for paper making is used to produce a Fourdrinier paper machine. Alternatively, a method of forming a wet paper web with a twin wire paper machine and drying the wet paper web has been conventionally known. These internal fillers prevent adhesion between pulp fibers, increase the scattering specific surface area, or increase the scattering efficiency due to the difference in bending ratio, which brings about improvement in opacity, but recently, weight reduction of paper and pulp The use of fillers more effectively and more is becoming more important in connection with the constraints and the handling of ever-increasing product quality requirements.
填料を多く含有させることにより、紙の不透明性は向上
するが、その際紙の強度が低下するため、紙中での填料
含有率には限界がある。填料の添加による紙の強度低下
を少なくする手段としては、A.J.Hayesがペーパーテク
ロノジーアンドインダストリー誌、1985年４月号に記載
しているような、填料をカチオン性高分子電解質で凝集
後、紙料に添加する技術が知られている。The opacity of the paper is improved by containing a large amount of the filler, but the strength of the paper is reduced at that time, so that the content of the filler in the paper is limited. As a means for reducing the decrease in the strength of the paper due to the addition of the filler, as described in AJ Hayes, Paper Technology and Industry, April 1985, the filler is coagulated with a cationic polyelectrolyte and then the paper is The technique of adding to the ingredients is known.
また、特公昭57−13680号公報には屈折率1.45〜1.65の
顔料を凝集させて、内部空隙の孔径が0.1μｍ以上でか
つできるだけ0.1μｍに近い大きさの内部空隙を多数形
成するようにした凝集粒子をパルプスラリーに添加して
抄造する不透明度、白色度が高く、かつ填料の歩留りの
すぐれた紙の製造方法が、更に特開昭54−116405号公報
には直径0.1〜0.3μｍの大きさの粒子を凝集させ、凝集
粒子を乾燥パルプに対して５〜80重量％含有させた、填
料入り紙製品が開示されている。更には、特開昭60−11
9299号公報に重質炭酸カルシウムを予めカチオン変性澱
粉水溶液と混合した後、紙料中に添加するワイヤ摩耗を
改善した抄紙法についての開示がある。Further, in JP-B-57-13680, pigments having a refractive index of 1.45 to 1.65 are aggregated to form a large number of internal voids having a pore diameter of 0.1 μm or more and as close to 0.1 μm as possible. A method for producing paper having high opacity and whiteness by adding agglomerated particles to pulp slurry and having high whiteness and a high yield of filler is disclosed in JP-A-54-116405, which has a diameter of 0.1 to 0.3 μm. There is disclosed a paper product containing a filler, which is obtained by agglomerating the particles of corn and adding the agglomerated particles to the dry pulp in an amount of 5 to 80% by weight. Furthermore, JP-A-60-11
Japanese Patent No. 9299 discloses a papermaking method in which ground calcium carbonate is mixed with an aqueous solution of cation-modified starch in advance and then added to a paper stock to improve wire wear.
（Ｃ）発明が解決しようとする問題点 従来の方法によるパルプスラリー中に填料を分散し、内
添助剤を加えて抄造することによる填料内添紙は、填料
の含有量を増加させれば、それだけ不透明性は向上する
ものの、繊維間に分布する填料によって繊維間の結合が
阻害され、その分強度の低下した紙になる。また、予め
填料を凝集させてから紙料に添加し、抄造する技術によ
れば、填料の添加による紙の強度低下の程度を減少させ
ることは可能ではあるが、その際填料を添加する目的の
一つである紙の不透明性向上の程度も低下する。この様
に填料による紙の不透明性と強度の変化は、相反する関
係にあり、両立させることは非常に困難である。(C) Problems to be Solved by the Invention A filler internally-added paper obtained by dispersing a filler in a pulp slurry by a conventional method and adding an internal-addition auxiliary agent to paper-making is possible if the content of the filler is increased. Although the opacity is improved by that much, the binding between the fibers is hindered by the filler distributed between the fibers, and the strength of the paper is reduced accordingly. Further, according to the technique of paper making by adding the filler to the paper after aggregating the filler in advance, it is possible to reduce the degree of decrease in the strength of the paper due to the addition of the filler, but at that time the purpose of adding the filler is The degree of improvement in the opacity of the paper, which is one, also decreases. As described above, the change in the opacity and the strength of the paper due to the filler have a contradictory relationship, and it is very difficult to make them compatible with each other.
本発明は填料を内添した紙の製造方法において紙の強度
を低下させることなく、不透明性を向上させる製造方法
を提供することを目的とする。An object of the present invention is to provide a manufacturing method for improving the opacity of a paper containing a filler, without lowering the strength of the paper.
（Ｄ）問題点を解決するための手段 本発明者らは填料を内添した紙を製造するに当たり、前
述のような種々の問題点を解決するために鋭意検討した
結果、填料と微細なバクテリアセルロース離解物とで予
め凝集塊を形成させておくことにより強度を低下させる
事なく不透明性を向上させることができることを見出し
本発明を完成した。(D) Means for Solving Problems The present inventors have made diligent studies in order to solve the above-mentioned various problems in producing a paper in which a filler is internally added. The present invention has been completed by finding that it is possible to improve the opacity without lowering the strength by forming an aggregate with the cellulose disaggregate in advance.
すなわち本発明は平均粒子径2.0μｍ以下の填料とバク
テリアセルロース離解物とを水中で混合分散せしめ、凝
集剤で予め凝集させた後、紙料に添加し、抄造すること
を特徴とする填料内添紙の製造方法である。That is, the present invention is characterized in that a filler having an average particle diameter of 2.0 μm or less and a bacterial cellulose disaggregated material are mixed and dispersed in water, pre-aggregated with a coagulant, and then added to a paper stock for papermaking. It is a method of manufacturing paper.
本発明の填料としては、平均粒子径が2.0μｍ以下のタ
ルク、クレー、二酸化チタン、沈降性炭酸カルシウム、
重質炭酸カルシウム、硫酸カルシウム、硫酸バリウム、
水酸化アルミニウム、活性白土、合成シリケート、カオ
リン、焼成カオリン、プラスチックピグメント等の紙に
通常使用されうる填料を単独又は混合して使用すること
ができる。平均粒子径が2.0μｍを越える填料では十分
な不透明性と強度が得られない。The filler of the present invention includes talc having an average particle size of 2.0 μm or less, clay, titanium dioxide, precipitated calcium carbonate,
Ground calcium carbonate, calcium sulfate, barium sulfate,
Fillers which can be usually used for paper such as aluminum hydroxide, activated clay, synthetic silicate, kaolin, calcined kaolin, and plastic pigment can be used alone or in combination. With a filler having an average particle size exceeding 2.0 μm, sufficient opacity and strength cannot be obtained.
本発明における平均粒子径と、填料の水分散駅を５分間
超音波分散器にて分散後、光透過式粒度分布測定器（SK
N式、セイシン企業社製）にかけ得られる粒度分布曲線
を用い、求めた累積重量パーセントが50％に相当する粒
子の直径である。The average particle size in the present invention and the water dispersion station of the filler are dispersed by an ultrasonic disperser for 5 minutes, and then a light transmission type particle size distribution measuring device (SK
N particle size, manufactured by Seishin Enterprise Co., Ltd.) is used to calculate the cumulative weight percentage, which is the diameter of the particles corresponding to 50%.
本発明のバクテリアセルロース離解物とは、微生物によ
り生産されるセルロース及び／あるいはセルロースを主
鎖としたヘテロ多糖を含むもの及び／あるいはβ−1,
3、β−1,2等のグルカンを含むものを機械的に解繊して
得られるものである。ヘテロ多糖の場合のセルロース以
外の構成成分はマンノース、フラクトース、ガラクトー
ス、キシロース、アラビノース、ラムノース、グルクロ
ン酸等の六炭糖、五炭糖及び有機酸等である。なお、バ
クテリアセルロースを生産する微生物は特に限定されな
いが、アセトバクター・アセチ・サブスピーシス・キシ
リナム（Acetobacter acetisubsp・xylinum）ATCC 1082
1あるいは同パストウリアン（Ａ・pasteurian）、同ラ
ンセンス（Ａ・rancens）、サルシナ・ベントリクリ（S
arcina ventriculi）、バクテリウム・キシロイデス（B
acterium xyloides）、シュードモナス属細菌、アグロ
バクテリウム属細菌等でバクテリアセルロースを生産す
るもの利用することができる。バクテリアセルロースの
離解には回転式の離解器、ミキサー、ホモジナイザー、
ビーター、リファイナー等の機械的剪断力を作用させる
装置を用いることができる。本発明における凝集剤とし
てはカチオン性高分子電解質のうち、分子量10万以上の
カチオン性ポリアクリルアマイド、カチオンでんぷん、
カチオン性グアーガムなどを使用することができる。な
お、その添加量は使用する填料およびバクテリアセルロ
ース離解物の種類により異なるが、0.01重量パーセント
以上10.0重量パーセント以下が適当である。更に、これ
らのカチオン性高分子電解質と複合体を形成し凝集を強
化するようなアニオン性高分子電解質、例えばアニオン
性ポリアクリルアマイド等、あるいはアニオン性無機微
粒子、例えばコロイダルシリカやベントナイト水分散
物、更にあるいは両性の高分子電解質や両性の無機微粒
子水分散物等を併用することによって、填料とバクテリ
アセルロース離解物との凝集物とすることも可能であ
る。The bacterial cellulose disaggregated product of the present invention includes cellulose produced by a microorganism and / or a heteropolysaccharide having cellulose as a main chain and / or β-1,
It is obtained by mechanically defibrating a material containing glucan such as 3, β-1,2. In the case of the heteropolysaccharide, the constituent components other than cellulose are hexoses such as mannose, fructose, galactose, xylose, arabinose, rhamnose and glucuronic acid, pentose sugars and organic acids. In addition, the microorganisms that produce bacterial cellulose are not particularly limited, but Acetobacter acetisubsp xylinum ATCC 1082
1 or the same pasteurian (A. pasteurian), the same lance (A. rancens), Sarsina Bentrichli (S
arcina ventriculi), Bacterium xyloides (B
Acterium xyloides), Pseudomonas bacteria, Agrobacterium bacteria, etc. that produce bacterial cellulose can be used. For disaggregation of bacterial cellulose, rotary disaggregator, mixer, homogenizer,
A device such as a beater or a refiner that exerts a mechanical shearing force can be used. As the aggregating agent in the present invention, among the cationic polyelectrolytes, a cationic polyacrylic amide having a molecular weight of 100,000 or more, cationic starch,
Cationic guar gum and the like can be used. The addition amount varies depending on the type of filler used and the type of bacterial cellulose disaggregate, but is suitably 0.01% by weight or more and 10.0% by weight or less. Further, such anionic polyelectrolytes to form a complex with these cationic polyelectrolytes to enhance aggregation, such as anionic polyacrylic amide, or anionic inorganic fine particles, such as colloidal silica and bentonite water dispersion, Further, or together with an amphoteric polyelectrolyte or an amphoteric inorganic fine particle water dispersion, it is possible to form an aggregate of the filler and the bacterial cellulose disaggregated product.
本発明の平均粒径2.0μｍ以下の填料（Ａ）とバクテリ
アセルロース離解物（Ｂ）との含有比率（A/B）は、重
量で0.5以上20.0以下が好ましい。（A/B）が0.5未満で
場合は所要の紙の強度に対して十分な不透明性向上効果
が得られず、（A/B）が20.0を越えると不透明性を満足
させると、紙の強度が低下する。The content ratio (A / B) of the filler (A) having an average particle size of 2.0 μm or less and the bacterial cellulose disaggregated product (B) of the present invention is preferably 0.5 or more and 20.0 or less. When (A / B) is less than 0.5, sufficient opacity-improving effect cannot be obtained for the required paper strength, and when (A / B) exceeds 20.0, opacity is satisfied and paper strength is increased. Is reduced.
本発明における填料内添紙には、通常抄紙で用いられる
添加剤、例えばサイズ剤、消泡剤、スライムコントリロ
ール剤、染料、着色顔料、蛍光剤、乾燥紙力増強剤、湿
潤紙力増強剤、濾水性向上剤、及び歩留り向上剤等を必
要に応じて含ませることが出来る。The filler internal addition paper in the present invention includes additives commonly used in papermaking, for example, sizing agents, defoaming agents, slime controlol agents, dyes, color pigments, fluorescent agents, dry paper strengthening agents, wet paper strengthening agents. , A drainage improver, a retention improver, and the like can be included as necessary.
また、本発明の填料内添紙の表面にでんぷん、ポリビニ
ルアルコール、各種表面サイズ剤等を塗抹することも可
能である。It is also possible to smear starch, polyvinyl alcohol, various surface sizing agents, etc. on the surface of the filler-added paper of the present invention.
（Ｅ）作用 填料とバクテリアセルロース離解物とを予め凝集させた
後、紙料に添加し抄造することにより、不透明性及び強
度のすぐれた填料内添紙が製造出来る理由としては、填
料のみを凝集させると光の散乱に有効な界面が著しく減
少するが、填料とは屈折率が異なり、かつ微細なバクテ
リアセルロース離解物を填料とともに凝集させるため、
光の散乱に有効な界面を減少させることの少ないことが
考えられる。(E) Action The reason why the filler-added paper excellent in opacity and strength can be produced by pre-aggregating the filler and the disaggregated bacterial cellulose, and then adding the paper to the paper stock to aggregate the filler By doing so, the effective interface for light scattering is significantly reduced, but since the refractive index is different from the filler and the fine bacterial cellulose disaggregated material is aggregated with the filler,
It is conceivable that the number of interfaces effective for light scattering is reduced.
また填料が凝集塊として繊維間に保持されるため、繊維
間の結合を阻害する微細な填料が少なく、強度の低下が
減少すると考えられる。In addition, since the filler is retained as an agglomerate between the fibers, it is considered that the amount of fine filler that inhibits the bonding between the fibers is small and the decrease in strength is reduced.
（Ｆ）実施例 以下に実施例を挙げ本発明の詳細な説明を行う。なお、
本発明に実施例に限定されるものではない。実施例にお
いて記載の部、％はすべて重量によるものである。(F) Examples Hereinafter, the present invention will be described in detail with reference to Examples. In addition,
The present invention is not limited to the examples. All parts and percentages in the examples are by weight.
バクテリアセルロール離解物調整例 シュークロース5g/dl、酵母エキス0.55g/dl、硫安0.5g/
dl、リン酸水素カリウム(KH2PO4)0.3g/dl、硫酸マグネ
シウム(MgSO4 7H2O)0.05g/dlからなる粗製の培地（pH5.
0）50mlを容量200mlの三角フラスコに張り込み、120℃
で20分間蒸気殺菌して培養液を作成した。Example of preparation of bacterial cellulose disaggregate Sucrose 5 g / dl, yeast extract 0.55 g / dl, ammonium sulfate 0.5 g /
dl, potassium hydrogen phosphate (KH 2 PO 4 ) 0.3 g / dl, magnesium sulfate (MgSO 4 7H 2 O) 0.05 g / dl crude medium (pH 5.
0) Pour 50 ml into an Erlenmeyer flask with a capacity of 200 ml and keep at 120 ° C.
It was sterilized with steam for 20 minutes to prepare a culture solution.
次いで、この培養液に、酵母エキス0.5g/dl、ペプトン
0.3g/dl、マンニトール2.5g/dlからなる組成の試験管斜
面寒天培地（pH6.0）で30℃、３日間生育させたアセト
バクター・アセチ・サブスピーシス・キシリナム（ATCC
10821）を１白金耳ずつ接種し、30℃で培養した。Then, to this culture solution, yeast extract 0.5 g / dl, peptone
Acetobacter aceti subspice xylinum (ATCC) grown on a test tube slope agar (pH 6.0) composed of 0.3 g / dl and mannitol 2.5 g / dl for 3 days at 30 ° C.
10821) was inoculated into each platinum loop and cultured at 30 ° C.
上記条件で30日間培養したところ、培養液の上層の白色
のバクテリアセルロース性多糖類を含むゲル状の膜が形
成された。このセルロース性多糖類のゲル状膜を水洗
後、乾燥重量の100倍の水を加え、エキセルオートホモ
ジナイザー（日本精機（株）製）を用いて15000rpmで10
分間処理し、バクテリアセルロース離解物の1.0％懸濁
液を調整した。After culturing for 30 days under the above conditions, a gel-like film containing white bacterial cellulosic polysaccharide as an upper layer of the culture solution was formed. After washing the gel-like film of this cellulosic polysaccharide with water, 100 times the dry weight of water was added, and 10 times at 15000 rpm using an Exel Auto Homogenizer (Nippon Seiki Co., Ltd.).
After treatment for 1 minute, a 1.0% suspension of bacterial cellulose disaggregated was prepared.
実施例１ ビーターによりカナダ標準濾水度で350mlまで叩解した
広葉樹クラフトパルプスラリーを調整した。これとは別
に粒子径1.0μｍの沈降性炭酸カルシウム（Ａ）と調製
例のバクテリアセルロース離解物（Ｂ）を重量比率（A/
B）で10/1、固形分濃度10％で水中に分散混合後、予め
加熱溶解したカチオン澱粉（王子ナショナル社製商品名
Cato2）を沈降性炭酸カルシウムとバクテリアセルロー
ス離解物の総重量に対し、固形分で１％相当量、添加攪
拌し凝集物のスラリーを得た。次いで先に調製したパル
プスラリー（パルス固形分で100部）に対し上記凝集物
を固形分で、45分添加した。このスラリーから秤量60g/
m2の紙を手抄きし、湿紙に7.0kg/cm2の圧力をかけて搾
水したのち、80℃の円筒ドライヤーで３分間乾燥し、実
施例１の試料を得た。Example 1 A hardwood kraft pulp slurry beaten up to 350 ml with a Canadian standard freeness using a beater was prepared. Separately, the weight ratio (A /) of the precipitated calcium carbonate (A) having a particle size of 1.0 μm and the bacterial cellulose disaggregated product (B) of the preparation example
Cationic starch (trade name of Oji National Co.)
Cato2) was added and stirred in an amount of 1% in terms of solid content based on the total weight of the precipitated calcium carbonate and the bacterial cellulose disaggregated to obtain a slurry of agglomerates. Next, the above-mentioned agglomerate was added as solid content for 45 minutes to the pulp slurry prepared above (100 parts by pulse solid content). Weigh 60 g / from this slurry
A paper of m 2 was handmade, water was applied to the wet paper under a pressure of 7.0 kg / cm 2 to squeeze water, and then dried with a cylindrical dryer at 80 ° C. for 3 minutes to obtain a sample of Example 1.
この試料の填料含有率は23％であった。The filler content of this sample was 23%.
比較例１ 実施例１の凝集物の代わりに平均粒子径1.0μｍの沈降
性炭酸カルシウムの固形分濃度10％の水分散液に、実施
例１と同じカチオン澱粉を炭酸カルシウムの重量に対し
0.5％添加して凝集物を得た。実施例１で使用したと同
じパルプのスラリーにパルプ固形分100部に対し、凝集
物を固形分で41部添加し、次いで調製例のバクテリアセ
ルロース離解物を４部添加した。次いで上記カチオン澱
粉溶液を固形分で0.23％添加し実施例１と同一の方法で
手抄きし、試料を得た。この試料を比較例１とする。こ
の試料の填料含有率は23％であった。Comparative Example 1 Instead of the agglomerates of Example 1, the same cationic starch as in Example 1 was added to an aqueous dispersion having a solid content concentration of 10% of precipitated calcium carbonate having an average particle size of 1.0 μm, based on the weight of calcium carbonate.
0.5% was added to obtain an aggregate. To the slurry of the same pulp as used in Example 1, 41 parts of solid matter by solid content was added to 100 parts of pulp solid content, and then 4 parts of the bacterial cellulose disaggregated product of Preparation Example was added. Next, 0.23% of the solid content of the above cationic starch solution was added and hand-papermaking was carried out in the same manner as in Example 1 to obtain a sample. This sample is referred to as Comparative Example 1. The filler content of this sample was 23%.
比較例２ 実施例１と同じパルプスラリー（パルプ固形分100部）
に、実施例１で用いたと同じ平均粒子径1.0μｍの沈降
性炭酸カルシウム45部と調製例のバクテリアセルロース
離解物４部及びカチオン澱粉溶液を固形分で0.45部、そ
れぞれ別々に添加混合し紙料とした。次いで実施例１と
同一の方法で手抄きし比較例２の試料を得た。この試料
の填料含有率は23％であった。Comparative Example 2 The same pulp slurry as in Example 1 (100 parts of pulp solids)
In addition, 45 parts of settling calcium carbonate having the same average particle diameter of 1.0 μm as used in Example 1, 4 parts of the bacterial cellulose disaggregated product of Preparation Example and 0.45 parts of cationic starch solution were added and mixed separately, respectively, to prepare a paper stock. And Then, the same method as in Example 1 was carried out to obtain a sample of Comparative Example 2. The filler content of this sample was 23%.
実施例２ 実施例１で用いた沈降性炭酸カルシウムを平均粒子径2.
0μｍの重質炭酸カルシウムとした他は、全て実施例１
と同一の方法で凝集物を得た。また、実施例１で調製し
たと同じパルプスラリー（パルプ固形分100部）に対
し、上記凝集物を固形分で45部添加し、アルキルケテン
ダイマーサイズ剤を固形分で0.05部添加して紙料を得
た。この紙料から秤量60g/m2の紙を手抄きし、湿紙に7.
0kg/m2の圧力をかけて搾水したのち、95℃の円筒ドライ
ヤーで３分間乾燥し、実施例２の試料を得た。この試料
の填料含有率は23％であった。Example 2 The precipitated calcium carbonate used in Example 1 had an average particle size of 2.
Example 1 except for using 0 μm heavy calcium carbonate
Aggregates were obtained in the same manner as. Further, to the same pulp slurry as prepared in Example 1 (100 parts of pulp solid content), 45 parts of the above aggregate was added in solid content, and 0.05 part of alkyl ketene dimer sizing agent was added in solid content to prepare a paper stock. Got From this stock, weigh paper of 60 g / m 2 by hand and make a wet paper 7.
After squeezing water by applying a pressure of 0 kg / m 2 , the sample was dried in a cylindrical dryer at 95 ° C. for 3 minutes to obtain a sample of Example 2. The filler content of this sample was 23%.
比較例３ 実施例２で用いた重質炭酸カルシウムを平均粒子径5.0
μｍの重質炭酸カルシウムとする以外は全で実施例２と
同一の方法で試料を得た。この試料の填料含有率は23％
であった。この試料を比較例３とする。Comparative Example 3 The heavy calcium carbonate used in Example 2 had an average particle size of 5.0.
A sample was obtained in the same manner as in Example 2 except that the ground calcium carbonate was μm. The filler content of this sample is 23%
Met. This sample is referred to as Comparative Example 3.
実施例３〜７ 実施例１と同一のパルプ100部に、平均粒子径0.3μｍの
沈降性炭酸カルシウム（Ａ）と調製例のバクテリアセル
ロース離解物（Ｂ）の混合比率（A/B）を0.25、0.50、
1.0、20.0、および50.0に変化させ、各混合物の填料と
バクテリアセルロース離解物の総重量に対し、0.05パー
セントのカチオン性ポリアクリルアミド（アライドコロ
イド社製商品名パーコル292）を添加し、５種類の凝集
物を作り、各凝集物毎にシート中の填料含有量が10％に
なるような５種類の手抄きシートを実施例１と同一の方
法で作製した。これらの試料を填料とバクテリアセルロ
ース離解物の混合比率の違いにより、それぞれ実施例3,
4,5,6,7とする。Examples 3 to 7 In 100 parts of the same pulp as in Example 1, the mixing ratio (A / B) of the precipitated calcium carbonate (A) having an average particle diameter of 0.3 μm and the bacterial cellulose disaggregated product (B) of Preparation Example was 0.25. , 0.50,
Change to 1.0, 20.0, and 50.0, and add 0.05% of cationic polyacrylamide (trade name Percol 292 manufactured by Allied Colloid Co., Ltd.) to the total weight of the filler and bacterial cellulose disaggregation of each mixture, and 5 types of aggregation 5 kinds of handmade sheets were prepared in the same manner as in Example 1 such that the content of the filler in the sheet was 10% for each aggregate. These samples were treated in accordance with the difference in the mixing ratio of the filler and the bacterial cellulose disaggregate, respectively, in Example 3,
Set to 4,5,6,7.
以上の結果を一括して第１表に示す。The above results are collectively shown in Table 1.
第１表の結果を考察する。通常、坪量60g/m2の印刷用紙
に必要とされる特性は、不透明度78％以上、内部結合強
度300g・cm/cm2以上であるが、不透明度82％以上、内部
結合強度350g・cm/cm2以上であればより好ましい。 Consider the results in Table 1. Normally, the properties required for printing paper with a basis weight of 60 g / m 2 are opacity of 78% or more and internal bond strength of 300 gcm / cm 2 or more, but opacity of 82% or more, internal bond strength of 350 gm. More preferably, it is at least cm / cm 2 .
第１表の実施例1,比較例1,2の結果は填料とバクテリア
セルロース離解物を前もって凝集後添加することにより
填料のみを凝集あるいは別々に添加する場合に比べ、高
い不透明性と強度を同時に有するシートの得られること
を示している。実施例1,2及び比較例３をみると填料の
粒子径として2.0μｍ以下がすぐれていることを示して
いる。実施例３〜７の結果から、填料（Ａ）とパルプ微
細繊維（Ｂ）の重量比率（A/B）は、0.50以上20.0以下
がとくに好ましいことが明らかである。The results of Example 1 and Comparative Examples 1 and 2 in Table 1 show high opacity and strength at the same time as compared with the case where only the filler is aggregated or added separately by adding the filler and the bacterial cellulose disaggregate after aggregation in advance. It is shown that a sheet having is obtained. Examining Examples 1 and 2 and Comparative Example 3, it is shown that the particle size of the filler is excellent at 2.0 μm or less. From the results of Examples 3 to 7, it is apparent that the weight ratio (A / B) of the filler (A) and the fine pulp fibers (B) is particularly preferably 0.50 or more and 20.0 or less.
（Ｇ）発明の効果 本発明のように、平均粒子径2.0μｍ以下の填料とバク
テリアセルロース離解物とをカチオン性高分子電解質に
より凝集させた後、紙料に添加することにより、不透明
性および強度のすぐれた填料内添紙が得られる。これ
は、不透明性か、強度のどちらか一方が低下する従来の
技術に比べて極めて優れたものである。(G) Effect of the invention As in the present invention, the filler having an average particle diameter of 2.0 μm or less and the bacterial cellulose disaggregated product are aggregated with the cationic polymer electrolyte and then added to the paper stock to obtain opacity and strength. An excellent paper with internal filler is obtained. This is extremely superior to the prior art in which either opacity or strength is reduced.
Claims (3)
アセルロース離解物とを水中で混合分散せしめ、凝集剤
で予め凝集させた後、紙料に添加し抄造することを特徴
とする填料内添紙の製造方法。1. A filler internal addition characterized in that a filler having an average particle diameter of 2.0 μm or less and a bacterial cellulose disaggregate are mixed and dispersed in water, pre-aggregated with a coagulant, and then added to a paper stock for papermaking. Paper manufacturing method.
クテリアセルロース離解物（Ｂ）との含有重量比率（A/
B）が0.5以上20.0以下である、特許請求の範囲第１項記
載の填料内添紙の製造方法。2. A content weight ratio (A /) of a filler (A) having an average particle diameter of 2.0 μm or less and a bacterial cellulose disaggregated material (B).
The method for producing a filler-added paper according to claim 1, wherein B) is 0.5 or more and 20.0 or less.
許請求の範囲第１項及び第２項記載の填料内添紙の製造
方法。3. The method for producing a filler-added paper according to claim 1, wherein the coagulant is a cationic polymer electrolyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13266487A JPH0672394B2 (en) | 1987-05-28 | 1987-05-28 | Manufacturing method of paper with internal filler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13266487A JPH0672394B2 (en) | 1987-05-28 | 1987-05-28 | Manufacturing method of paper with internal filler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63295793A JPS63295793A (en) | 1988-12-02 |
| JPH0672394B2 true JPH0672394B2 (en) | 1994-09-14 |
Family
ID=15086610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13266487A Expired - Lifetime JPH0672394B2 (en) | 1987-05-28 | 1987-05-28 | Manufacturing method of paper with internal filler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0672394B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01246495A (en) * | 1988-03-23 | 1989-10-02 | Ajinomoto Co Inc | Production of paper |
| FI121890B (en) * | 2009-06-08 | 2011-05-31 | Upm Kymmene Corp | A new type of paper and a process for making it |
| JP5416531B2 (en) * | 2009-09-30 | 2014-02-12 | 日本製紙株式会社 | Filler pretreatment method and paper containing pretreated filler |
| SE536746C2 (en) * | 2010-05-12 | 2014-07-08 | Stora Enso Oyj | A composition containing microfibrillated cellulose and a process for making a composition |
| KR20150063561A (en) * | 2012-10-05 | 2015-06-09 | 스페셜티 미네랄스 (미시간) 인코포레이티드 | Filler suspension and its use in the manufacture of paper |
| JP7093920B2 (en) * | 2017-10-13 | 2022-07-01 | 株式会社トーヨ | Cellulose nanofiber-containing sheet and its manufacturing method |
-
1987
- 1987-05-28 JP JP13266487A patent/JPH0672394B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63295793A (en) | 1988-12-02 |
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