JP2556706B2 - Method for producing calcium carbonate for papermaking - Google Patents

Method for producing calcium carbonate for papermaking

Info

Publication number
JP2556706B2
JP2556706B2 JP62175772A JP17577287A JP2556706B2 JP 2556706 B2 JP2556706 B2 JP 2556706B2 JP 62175772 A JP62175772 A JP 62175772A JP 17577287 A JP17577287 A JP 17577287A JP 2556706 B2 JP2556706 B2 JP 2556706B2
Authority
JP
Japan
Prior art keywords
calcium carbonate
paper
spindle
present
papermaking
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 - Fee Related
Application number
JP62175772A
Other languages
Japanese (ja)
Other versions
JPS6418911A (en
Inventor
知正 毎田
洋志 柴田
由詔 大野
敏男 藤原
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.)
Maruo Calcium Co Ltd
Original Assignee
Maruo Calcium 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 Maruo Calcium Co Ltd filed Critical Maruo Calcium Co Ltd
Priority to JP62175772A priority Critical patent/JP2556706B2/en
Publication of JPS6418911A publication Critical patent/JPS6418911A/en
Application granted granted Critical
Publication of JP2556706B2 publication Critical patent/JP2556706B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63Inorganic compounds
    • D21H17/67Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675Oxides, hydroxides or carbonates
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63Inorganic compounds
    • D21H17/66Salts, e.g. alums

Description

【発明の詳細な説明】 「産業上の利用分野」 本発明は、製紙用炭酸カルシウムの製造方法に関する
ものである。
The present invention relates to a method for producing calcium carbonate for papermaking.

「従来技術と問題点」 炭酸カルシウムは古くからゴム、プラスチック、塗
料、シーリング材、製紙等の分野で工業用原材料として
広く使用され、それぞれ優れた機能を発揮している。こ
れらの分野で使用される炭酸カルシウムの粒子形状は大
別して、粒径0.03〜0.1μm程度の立方体か、長径0.5〜
3.0μm、短径0.1〜1.0μmの紡錘形に分類出来る。従
来から紡錘形炭酸カルシウムは主としてゴムの補強剤、
紙の填料等の用途に使用されて来た。これらの分野、特
に紙の填料としての分野では、より高品質の炭酸カルシ
ウムが待望されている。
"Conventional Technology and Problems" Calcium carbonate has been widely used as an industrial raw material in the fields of rubber, plastics, paints, sealing materials, papermaking, etc. for a long time, and exhibits excellent functions. The particle shape of calcium carbonate used in these fields is roughly classified into a cube with a particle size of 0.03 to 0.1 μm or a major axis of 0.5 to
It can be classified into a spindle type with a diameter of 3.0 μm and a minor axis of 0.1 to 1.0 μm. Conventionally, spindle-shaped calcium carbonate has been mainly used as a rubber reinforcing agent,
It has been used for applications such as paper filler. In these fields, especially as a filler for paper, higher quality calcium carbonate is desired.

インディアンペーパー、ライスペーパー、伝票用紙等
の高級薄紙には、従来から不透明度、白色度を付与させ
る目的で紡錘形炭酸カルシウムが使用されて来た。これ
らの紙は非常に薄いため、一層の不透明度と白色度が要
求される。現在使用されている紡錘形炭酸カルシウムは
1次粒子径については長径1.0〜2.0μm、短径0.3〜0.7
μm程度のものである。しかし、これらは非常に凝集し
易く、単一粒子としては1次粒子の5倍から10倍以上あ
る。このように単一粒子が大きいと、不透明度、白色度
は不十分である。また、逆に小さい粒子、例えば粒径0.
05〜0.5μm程度の立方体粒子の場合は、不透明度は良
くなるが紙力が低下する。
For high-quality thin paper such as Indian paper, rice paper and slip paper, spindle-shaped calcium carbonate has been used for the purpose of imparting opacity and whiteness. These papers are so thin that more opacity and whiteness are required. The spindle-shaped calcium carbonate currently used has a primary particle diameter of 1.0 to 2.0 μm in major axis and 0.3 to 0.7 in minor axis.
It is about μm. However, these are very likely to aggregate, and as single particles, they are 5 to 10 times or more as large as the primary particles. When the single particles are large, the opacity and whiteness are insufficient. On the contrary, small particles, for example, particle size 0.
In the case of cubic particles of about 05 to 0.5 μm, opacity is improved but paper strength is reduced.

このように、現状の紡錘形炭酸カルシウムや、微細な
立方体炭酸カルシウムでは薄紙に対して十分な効果が発
揮出来ない。しかし、一方、今日の製紙業界をとりまく
環境は厳しく、製品の原価低減は不可避な状況となって
いる。この薄紙の分野ではTiO2と紡錘形炭酸カルシウム
が併用されているが、最近高騰しているTiO2を出来る限
り減らすことが、原価低減の最短距離である。即ち、Ti
O2と併用使用する炭酸カルシウムの不透明度、白色度を
出来るだけ向上させ、その分だけTiO2使用量を低減させ
ることが必要である。しかし乍ら、前述のように、従来
の炭酸カルシウムでは不透明度と紙力の両方を維持させ
ることが難しいため、この問題は未だ解決できていない
のが実情である。
Thus, the present spindle-shaped calcium carbonate and fine cubic calcium carbonate cannot exert a sufficient effect on thin paper. On the other hand, however, the environment surrounding today's paper industry is harsh, and cost reduction of products is inevitable. In the field of thin paper, TiO 2 and spindle-shaped calcium carbonate are used together, but reducing the TiO 2 that has been soaring recently is the shortest distance for cost reduction. That is, Ti
It is necessary to improve the opacity and whiteness of calcium carbonate used together with O 2 as much as possible, and to reduce the amount of TiO 2 used accordingly. However, as described above, since it is difficult to maintain both opacity and paper strength with conventional calcium carbonate, this problem has not yet been solved.

「問題点を解決するための手段」 本発明者らは、上記実情に鑑み鋭意研究の結果、前述
のような従来技術が直面する問題点を一挙に解決するこ
とに成功し、本発明を完成した。
“Means for Solving Problems” As a result of earnest research in view of the above-mentioned circumstances, the present inventors have succeeded in solving the problems faced by the above-described conventional techniques all at once, and completed the present invention. did.

即ち、本発明はCa(OH)水スラリーにCO2ガスを吹
き込んで炭酸カルシウムを製造するに際し、前記Ca(O
H)水スラリーの濃度を5〜40wt%、温度を26〜65℃
に調整するとともに硫酸化合物を添加してCO2ガスを吹
き込み炭酸化させることにより、平均粒子径が短径0.1
〜1μm、長径0.6〜3μmの紡錘形炭酸カルシウムを
得ることを特徴とする製紙用炭酸カルシウムの製造方法
を内容とするものである。
That is, upon the present invention to produce a calcium carbonate by bubbling Ca (OH) 2 water slurry to CO 2 gas, the Ca (O
H) 2 Concentration of water slurry is 5-40wt%, temperature is 26-65 ℃
As well as adjusted by the addition of sulfuric acid compound to CO by 2 be carbonated blowing gas, average particle diameter short diameter 0.1
The present invention relates to a method for producing calcium carbonate for papermaking, characterized in that spindle-shaped calcium carbonate having a diameter of ˜1 μm and a major axis of 0.6 to 3 μm is obtained.

本発明で使用するCa(OH)の水スラリー濃度は5〜
40wt%、好ましくは10〜20wt%程度が良い。温度は26〜
65℃、好ましくは26〜45℃程度が良い。CO2のガス量は
(CO2ガス100%純度として)50/min/kg・Ca(OH)
以下、好ましくは20/min/kg・Ca(OH)以下程度が
良い。CO2のガス濃度は10〜40%、好ましくは20〜35%
程度が良い。
The water slurry concentration of Ca (OH) 2 used in the present invention is 5 to
40 wt%, preferably 10 to 20 wt% is good. The temperature is 26 ~
The temperature is 65 ° C, preferably 26 to 45 ° C. Gas amount of CO 2 is (as CO 2 gas of 100% purity) 50 / min / kg · Ca (OH) 2
Below, preferably about 20 / min / kg · Ca (OH) 2 or less. CO 2 gas concentration is 10-40%, preferably 20-35%
The degree is good.

本発明に用いられる硫酸化合物としてはH2SO4,MgSO4,
BaSO4,SrSO4,CaSO4,Na2SO4,K2SO4等が挙げられられ、こ
れらは単独又は2種以上混合して用いられるが、就中、
MgSO4が好適である。これらの硫酸化合物の添加量は水
酸化カルシウムに対して0.05〜10.0wt%、好ましくは0.
1〜5.0wt%程度が良い。10.0wt%越える添加量になる
と、紡錘形炭酸カルシウムが出来にくく(連鎖状のコロ
イド炭酸カルシウムが出来る)、また、一部紡錘形炭酸
カルシウムが生成しても所望の粒径よりも粒子が小さ
い。一方、添加量が0.05wt%未満だと、粒子の分散性を
向上させる効果がほとんどない。こうして出来た紡錘形
炭酸カルシウムは1次粒子径が長径0.6〜3.0μm、短径
0.1〜1μm、好ましくは長径1.0〜2.0μm、短径0.3〜
0.7μmで、より好ましくはアスペクト比が5以上のよ
く分散した粒子である。上記の如くして得られる高分散
性の紡錘形炭酸カルシウムは薄紙の填料として使用する
場合は、乾燥してパウダー化せず、水スラリーのままで
使用する方が好ましい。乾燥させると、高分散している
粒子が凝集して本来の効果が損なわれる。
The sulfuric acid compound used in the present invention includes H 2 SO 4 , MgSO 4 ,
BaSO 4 , SrSO 4 , CaSO 4 , Na 2 SO 4 , K 2 SO 4 and the like may be mentioned, and these may be used alone or in combination of two or more.
MgSO 4 is preferred. The addition amount of these sulfuric acid compounds is 0.05 to 10.0 wt% with respect to calcium hydroxide, preferably 0.1.
About 1 to 5.0 wt% is good. If the addition amount exceeds 10.0 wt%, spindle-shaped calcium carbonate is difficult to form (chain-like colloidal calcium carbonate is formed), and even if some spindle-shaped calcium carbonate is produced, the particles are smaller than the desired particle size. On the other hand, if the addition amount is less than 0.05 wt%, there is almost no effect of improving the dispersibility of particles. The spindle-shaped calcium carbonate produced in this way has a primary particle diameter of 0.6-3.0 μm in major axis and short diameter.
0.1-1 μm, preferably 1.0-2.0 μm in major axis, 0.3-minor axis
The particles are 0.7 μm, and more preferably particles having an aspect ratio of 5 or more and well dispersed. When the highly dispersible spindle-shaped calcium carbonate obtained as described above is used as a filler for thin paper, it is preferable to use it as an aqueous slurry without being dried and powdered. When dried, the highly dispersed particles aggregate to impair the original effect.

「作用・効果」 従来から、炭酸カルシウムを生成させる段階において
硫酸化合物を添加する方法はいくつかある。例えば特公
昭45−31851、特公昭56−40118、特公昭50−33995等が
ある。そして特公昭50−33995、特公昭56−40118は硫酸
化合物を添加することによって微細な立方体粒子を連鎖
状に連ねることが目的である。また、上記特公昭45−31
851は本発明と同じ紡錘形であるが、粒子径が本発明品
より小さい長径0.5μm、短径0.05μm程度のものであ
り、且つ硫酸化合物とアルカリを併用使用することによ
って所望の粒子を得るものである。また、これらの方法
は全て対象となる使用分野がゴム、塗料等である。
"Action / Effect" Conventionally, there are several methods of adding a sulfuric acid compound at the stage of producing calcium carbonate. For example, there are JP-B-45-31851, JP-B-56-40118, and JP-B-50-33995. In addition, Japanese Patent Publications Nos. 50-33995 and 56-40118 are aimed at connecting fine cubic particles in a chain by adding a sulfuric acid compound. In addition, the above Japanese Patent Publication No.
851 has the same spindle shape as that of the present invention, but has a particle diameter smaller than that of the present invention of about 0.5 μm in major axis and 0.05 μm in minor axis, and obtains desired particles by using a sulfuric acid compound and an alkali in combination. Is. In addition, all of these methods are applied to rubber, paints and the like.

本発明は飽く迄製紙分野、具体的には薄紙の填料とし
て、またコート紙のコーティングカラーの顔料としてで
ある。
The present invention is until the end of the invention in the field of papermaking, in particular as a filler for thin paper and as a coating color pigment for coated paper.

本発明の紙用途での効果とゴム、塗料用途での効果で
は、作用効果の機構が全く異なる。例えば特公昭45−31
851では硫酸カルシウムとアルカリを併用して長径0.5μ
m、短径0.05μmの比較的分散した紡錘形炭酸カルシウ
ムを生成させて、これをゴム用として使用すると優れた
効果が出ることが記載されているが、これは飽く迄ゴム
に使用した場合の効果である。即ち、この程度の大きさ
の紡錘形炭酸カルシウムを紙分野に使用しても、不透明
度は向上するが、紙力が低下し、全く実用に耐えない。
薄紙においては同一重量の配合部数であれば単一粒子が
大きい程紙力は大きくなる。
The mechanism of action and effect is completely different between the effect of the present invention for paper use and the effect of rubber and paint application. For example, Japanese Patent Publication Sho-45-31
851 has a major axis of 0.5μ using both calcium sulfate and alkali
It is described that when a relatively dispersed spindle-shaped calcium carbonate with a short diameter of 0.05 μm is used and this is used as a rubber, an excellent effect can be obtained. is there. That is, even if a spindle-shaped calcium carbonate of such a size is used in the paper field, the opacity is improved, but the paper strength is reduced and it cannot be put to practical use at all.
In the case of thin paper, the paper strength increases as the size of a single particle increases when the number of parts is the same.

本発明はこの紡錘形炭酸カルシウムより大きく、1次
粒子径についていえば長径0.6〜3μm、短径0.1〜1μ
m、好ましくは長径1.0〜2.0μm、短径0.3〜0.7μm程
度で、より好ましくはアスペクト比5以上の紡錘形であ
る。粉体の隠蔽性は屈折率以外に粒子径が関係する。特
に紙の填料として使用する場合は、粒子径が大きな影響
を与える。これは光の波形との関係によるものである。
紙の不透明度については、填料の立場で考えれば填料
(即ち、この場合は炭酸カルシウム)の光の散乱の程度
が不透明度となる。散乱は単一粒子の大きさ、言いかえ
れば粒子の分散性と相関性がある。白色度についても同
じことが言える。従って、本発明の目的とする用途の一
つである薄紙において不透明度、白色度を向上させ、且
つ紙力を維持させるためにはある一定範囲内に単一粒子
を設定しなければならない。本発明により得られる紡錘
形炭酸カルシウムは上記要請を満足する。また本発明で
得られる炭酸カルシウムをコート紙のコーティングカラ
ーの顔料として使用しても、十分な効果を発揮する。こ
の分野で使用する顔料は、一次粒子がある一定の大きさ
で出来るだけ粒子が分散したものがよい。本発明の紡錘
形炭酸カルシウムはこれを十分に充足する。
The present invention is larger than this spindle-shaped calcium carbonate and has a primary particle diameter of 0.6 to 3 μm in major axis and 0.1 to 1 μ in minor axis.
m, preferably 1.0 to 2.0 μm in major axis, 0.3 to 0.7 μm in minor axis, and more preferably spindle-shaped with an aspect ratio of 5 or more. In addition to the refractive index, the particle size is related to the hiding power of the powder. Especially when it is used as a filler for paper, the particle size has a great influence. This is due to the relationship with the light waveform.
Regarding the opacity of the paper, from the standpoint of the filler, the degree of light scattering of the filler (that is, calcium carbonate in this case) is the opacity. Scattering correlates with the size of a single particle, in other words the dispersibility of the particle. The same is true for whiteness. Therefore, in order to improve opacity and whiteness and maintain paper strength in thin paper, which is one of the purposes of the present invention, single particles must be set within a certain range. The spindle-shaped calcium carbonate obtained by the present invention satisfies the above requirements. Even when the calcium carbonate obtained in the present invention is used as a pigment for the coating color of coated paper, a sufficient effect is exhibited. The pigment used in this field is preferably a primary particle in which particles having a certain size are dispersed as much as possible. The spindle-shaped calcium carbonate of the present invention sufficiently satisfies this.

「実施例」 以下、本発明を実施例及び比較例を挙げて更に詳細に
説明するが、本発明はこれにより何ら制限されるもので
はない。
"Examples" Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

実施例1 濃度130g/、温度38℃に調整したCa(OH)水スラ
リー30にCO2濃度30%である空気とCO2混合ガスを20
/min/kg・Ca(OH)の割合で吹き込んでCa(OH)
炭酸化した。この場合Ca(OH)水スラリーにあらかじ
めMgSO4・7H2Oを39g(Ca(OH)に対して1.0wt%)添
加した。得られた炭酸カルシウムの粒子径を電子顕微鏡
で調べた。結果を第1表に示す。
Example 1 To a Ca (OH) 2 water slurry 30 adjusted to a concentration of 130 g / temperature of 38 ° C., 20% of air and CO 2 mixed gas having a CO 2 concentration of 30%
Ca (OH) 2 was carbonated by blowing in at a ratio of / min / kg · Ca (OH) 2 . In this case, 39 g (1.0 wt% with respect to Ca (OH) 2 ) of MgSO 4 .7H 2 O was added to the Ca (OH) 2 aqueous slurry in advance. The particle size of the obtained calcium carbonate was examined by an electron microscope. The results are shown in Table 1.

実施例2 実施例1において、MgSO4・7H2OをBaSO4に変えた他は
全て実施例1と同じ方法で炭酸化し、粒子径を調べた。
Example 2 Carbonation was carried out in the same manner as in Example 1 except that MgSO 4 .7H 2 O was changed to BaSO 4 in Example 1, and the particle size was examined.

比較例1 実施例1においてMgSO4・7H2Oを添加しない以外は全
て実施例1と同じ方法で炭酸化し、粒子径を調べた。
Comparative Example 1 Carbonization was carried out in the same manner as in Example 1 except that MgSO 4 .7H 2 O was not added in Example 1, and the particle size was examined.

比較例2 実施例1において、更に水酸化ナトリウム210gを添加
する以外は全て実施例1と同じ方法で炭酸化し、粒子径
を調べた。
Comparative Example 2 Carbonation was carried out in the same manner as in Example 1 except that 210 g of sodium hydroxide was added, and the particle size was examined.

次に、実施例1、2及び比較例1で得られた炭酸カル
シウムについて、粒度分布を測定した。尚、粒度分布は
島津製作所製、SA−CP2を用いて測定した。その結果
を、それぞれ第1図、第2図及び第3図に示した。
Next, the particle size distributions of the calcium carbonates obtained in Examples 1 and 2 and Comparative Example 1 were measured. The particle size distribution was measured using SA-CP2 manufactured by Shimadzu Corporation. The results are shown in FIG. 1, FIG. 2 and FIG. 3, respectively.

上記結果から、実施例1、2の本発明品は優れた分散
性を示し、またMgSO4はBaSO4よりも優れた分散効果を示
すことが分かる。これに対して、比較例1のものは第1
表に示した如く、本発明品と同等の平均粒子径及び形状
からなるが、第3図に示す如く、二次凝集し分散性が悪
い。
From the above results, it can be seen that the products of the present invention of Examples 1 and 2 exhibit excellent dispersibility, and that MgSO 4 exhibits a superior dispersing effect to BaSO 4 . On the other hand, in Comparative Example 1, the first
As shown in the table, it has the same average particle size and shape as the product of the present invention, but as shown in FIG. 3, secondary aggregation occurs and the dispersibility is poor.

次に、実施例1、比較例1、2で得られた炭酸カルシ
ウムを用いて抄紙試験を行った。結果を第2表に示す。
Next, a papermaking test was conducted using the calcium carbonates obtained in Example 1 and Comparative Examples 1 and 2. The results are shown in Table 2.

配合: (a)パルプ(L/N=7/3) 100 重量部 (b)CaCO3 60 重量部 (c)水 パルプ濃度 2.5 重量% (d)カチオンデンプン 1 重量部 (e)硫酸バンド 0.5 重量部 (f)サイズ剤(ハーサイズAK−188) 0.2 重量部 (g)定着剤(カイメン557H) 0.05重量部 (h)歩留向上剤(NR−11LH) 0.02重量部 以上の抄紙試験結果より、本発明品は填料として不透
明度、白色度が優れ、且つ紙力を維持するというパラン
スのとれた物性を保持していることが分かる。一方、比
較例1のものは白色度、不透明度、紙S値、顔料S値が
劣り、また比較例2のものは裂断長、比破裂(紙力)が
劣っている。
Composition: (a) Pulp (L / N = 7/3) 100 parts by weight (b) CaCO 3 60 parts by weight (c) Water pulp concentration 2.5% by weight (d) Cationic starch 1 part by weight (e) Sulfuric acid band 0.5 parts by weight Parts (f) Sizing agent (Harsize AK-188) 0.2 parts by weight (g) Fixing agent (Kamen 557H) 0.05 parts by weight (h) Yield improver (NR-11LH) 0.02 parts by weight From the above paper-making test results, it can be seen that the product of the present invention has excellent opacity and whiteness as a filler, and has well-balanced physical properties of maintaining paper strength. On the other hand, Comparative Example 1 is inferior in whiteness, opacity, paper S value and pigment S value, and Comparative Example 2 is inferior in breaking length and specific burst (paper strength).

また、実施例1と比較例1で得られた炭酸カルシウム
をコート紙のコーティングカラーの顔料として用い、テ
ストを行った。結果を第3表に示す。
Further, a test was conducted using the calcium carbonate obtained in Example 1 and Comparative Example 1 as a pigment for the coating color of coated paper. The results are shown in Table 3.

第3表の結果より、コート紙に使用しても本発明品は
優れた効果を発揮することが分かる。
From the results shown in Table 3, it can be seen that the product of the present invention exhibits excellent effects even when used for coated paper.

尚、試験は下記の方法で行った。 The test was conducted by the following method.

(イ)カラー処方 試料スラリー :100重量部 Latex JSR0692: 13重量部Starch MS4600: 7重量部 固形分濃度 : 55重量% ステンレス容器に試料スラリー、Latex、Starchと水
を投入したボディスパーで、分散を行いカラーを調整し
た。
(A) Color prescription Sample slurry: 100 parts by weight Latex JSR0692: 13 parts by weight Starch MS4600: 7 parts by weight Solid content concentration: 55% by weight Disperse the sample slurry, latex, Starch and water in a stainless steel container with a body spar The color was adjusted.

(ロ)塗工方法 原紙(秤量68/m2のコート原紙)を使用し、コーティ
ングロッドで15g/m2の片面塗工を行った。これを直ちに
熱風乾燥機に入れ、120℃で2分間キュアリングを行っ
た後に20℃、65%RHの高温恒湿槽中で12時間コンデショ
ニングを行い、スーパーカレンダーをかけて塗工紙を得
た。
(B) Coating method Using a base paper (weight of 68 / m 2 of coated base paper), 15 g / m 2 of one side was coated with a coating rod. Immediately put this in a hot-air dryer, cure at 120 ° C for 2 minutes, and then condition for 12 hours in a high-temperature constant-humidity bath at 20 ° C and 65% RH, and apply a super calendar to obtain coated paper. It was

スーパーカレンダー処理条件 線圧:70kg/cm2 温度:60℃ 通紙回数:3回 カレンダー速度:8m/min (ハ)塗工物性測定条件 塗工量:10×10(cm2)の塗工紙の重量を化学天秤で秤量
し、原紙の秤量を差し引いて測定、10枚の試験片の平均
値。
Super calendering conditions Linear pressure: 70 kg / cm 2 Temperature: 60 ° C Number of passes: 3 Calender speed: 8 m / min (c) Measurement conditions for coating properties Coating amount: 10 × 10 (cm 2 ) coated paper Is weighed with an analytical balance, and the measured value is obtained by subtracting the weighing of the base paper, and the average value of 10 test pieces is obtained.

白紙白色度:JIS−P−8123 10枚の試験片の測定値の平
均値。
Whiteness of white paper: JIS-P-8123 Average value of measured values of 10 test pieces.

白紙光沢度:JIS−P−8142 10枚の試験片の測定値の平
均値。
Glossiness of blank paper: JIS-P-8142 Average value of measured values of 10 test pieces.

印刷光沢度:JIS−P−8142 10枚の試験片の測定値の平
均値。
Print glossiness: JIS-P-8142 Average value of measured values of 10 test pieces.

周速1m/sec、1回転展色、インキ供給量0.4ml。Peripheral speed 1m / sec, 1 rotation color development, ink supply 0.4ml.

(使用インキ:東洋インキ製TKブライトG墨−ロ) RI・Dry・Pick:5点法で評価、10枚の試験片の測定値の
平均値。
(Ink used: TK Bright G black ink manufactured by Toyo Ink) RI / Dry / Pick: Evaluated by the 5-point method, the average of the measured values of 10 test pieces.

周速3m/sec、15回転展色、インキ供給量0.35ml。Peripheral speed 3m / sec, 15 rotation color development, ink supply 0.35ml.

(使用インキ:大日本インキ製ダックグレードTV=14
墨) RI・Ink・Set:目視評価しSet完了の時間(min)で表
示。
(Ink used: Dainippon Ink Duck Grade TV = 14
(Ink) RI / Ink / Set: Visual evaluation and set time (min) is displayed.

周速1m/sec、1回転展色、インキ供給量0.3ml。Peripheral speed 1m / sec, 1 rotation color development, ink supply 0.3ml.

(使用インキ:東洋インキ製TKブライトG紅−ロ) RI・Wet着肉:印刷白色度を測定、白色度低下率で表
示。
(Ink used: Toyo Ink's TK Bright G-b) RI ・ Wet Ink: Printed whiteness is measured and expressed as a decrease in whiteness.

周速3m/sec、1回転展色、湿し水2.5ml繰り込み、イン
キ供給量0.6ml。
Circumferential speed 3m / sec, one rotation color development, fountain solution 2.5ml, ink supply 0.6ml.

(使用インキ:東洋インキ製TKブライトG紅−ロ) K&N濃度:印刷白色度を測定、白色度低下率で表示。(Ink used: Toyo Ink TK Bright G Red-B) K & N density: Print whiteness is measured and displayed as a whiteness reduction rate.

K&N ink2min値 墨濃度:印刷白色度を測定し、白色度低下率で表示。K & N ink2min value Black density: Print whiteness is measured and displayed as whiteness reduction rate.

亜麻仁油黒色INK40sec値 測定機器 恒温恒湿槽:FR−1(株)タバイ製作所 スーパーカレンダー:熊谷理工(株) RI・II型テスター:(株)明製作所 グロスメーター:村上色彩技研 GM−3M ハンター式比色度計:No.441 TSS型(株)東洋精機 B型粘度計:東京計器Flaxseed oil black INK40sec value measuring device Constant temperature and humidity chamber: FR-1 Tabai Manufacturing Co., Ltd. Super calendar: Kumagai Riko Co., Ltd. RI / II type tester: Akira Manufacturing Co., Ltd. Gloss meter: Murakami Color Research Institute GM-3M Hunter type Colorimeter: No.441 TSS type Toyo Seiki Co., Ltd. B type viscometer: Tokyo Keiki

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

第1図乃至第3図は、それぞれ実施例1、2及び比較例
1で得られた炭酸カルシウムの粒度分布図である。
1 to 3 are particle size distribution diagrams of calcium carbonate obtained in Examples 1 and 2 and Comparative Example 1, respectively.

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】Ca(OH)水スラリーにCO2ガスを吹き込
んで炭酸カルシウムを製造するに際し、前記Ca(OH)
水スラリーの濃度を5〜40wt%、温度を26〜65℃に調整
するとともに硫酸化合物を添加してCO2ガスを吹き込み
炭酸化させることにより、平均粒子径が短径0.1〜1μ
m、長径0.6〜3μmの紡錘形炭酸カルシウムを得るこ
とを特徴とする製紙用炭酸カルシウムの製造方法。
1. A Ca (OH) upon the production of calcium carbonate by bubbling CO 2 gas in 2 water slurry, the Ca (OH) 2
By adjusting the concentration of the water slurry to 5 to 40 wt% and the temperature to 26 to 65 ° C and adding a sulfuric acid compound and blowing CO 2 gas to carbonate, the average particle diameter is 0.1 to 1 μ in minor axis.
m, a spindle-shaped calcium carbonate having a major axis of 0.6 to 3 μm, and a method for producing calcium carbonate for papermaking.
【請求項2】硫酸化合物がH2SO4,MgSO4,BaSO4,SrSO4,Ca
SO4,Na2SO4,K2SO4から選択される少なくとも1種である
特許請求の範囲第1項記載の製造方法。
2. A sulfuric acid compound is H 2 SO 4 , MgSO 4 , BaSO 4 , SrSO 4 , Ca.
The manufacturing method according to claim 1, which is at least one selected from SO 4 , Na 2 SO 4 , and K 2 SO 4 .
【請求項3】硫酸化合物がMgSO4である特許請求の範囲
第2項記載の製造方法。
3. The method according to claim 2, wherein the sulfuric acid compound is MgSO 4 .
JP62175772A 1987-07-14 1987-07-14 Method for producing calcium carbonate for papermaking Expired - Fee Related JP2556706B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62175772A JP2556706B2 (en) 1987-07-14 1987-07-14 Method for producing calcium carbonate for papermaking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62175772A JP2556706B2 (en) 1987-07-14 1987-07-14 Method for producing calcium carbonate for papermaking

Publications (2)

Publication Number Publication Date
JPS6418911A JPS6418911A (en) 1989-01-23
JP2556706B2 true JP2556706B2 (en) 1996-11-20

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2133472A1 (en) * 1992-04-03 1993-10-14 Vicki J. Kroc Clustered precipitated calcium carbonate particles
JPH07197398A (en) * 1994-11-21 1995-08-01 Okutama Kogyo Kk Aggregated calcium carbonate and papermaking pigment
KR0182788B1 (en) * 1996-02-02 1999-04-15 유규재 Manufacturing method of calcium carbonate
KR20010080481A (en) * 1999-10-26 2001-08-22 추후제출 calcium carbonates and their preparation methods
JP2001354415A (en) * 2000-06-09 2001-12-25 Hokkaido Kyodo Sekkai Kk Method for manufacturing lightweight calcium carbonate
JP2001354416A (en) * 2000-06-09 2001-12-25 Hokkaido Kyodo Sekkai Kk Method for manufacturing aragonite type calcium carbonate
JP4584436B2 (en) * 2000-10-18 2010-11-24 日本製紙パピリア株式会社 Cigarette paper
JP2002128521A (en) * 2000-10-20 2002-05-09 Hokkaido Kyodo Sekkai Kk Method of manufacturing calcium carbonate
JP4091940B2 (en) * 2002-07-12 2008-05-28 ピーティー・パブリク ケルタス チウィ キミア ティービーケー Novel calcium carbonate filler for papermaking, paper using the filler and method for producing the same
FR2846978B1 (en) * 2002-11-08 2007-05-18 Coatex Sas USE OF A COPOLYMER HAVING AT LEAST ONE GRAFT FUNCTION ALKOXY OR HYDROXY POLYALKYLENE GLYCOL, AS AGENT ENHANCING ACTIVATION OF OPTICAL AZURING AND PRODUCTS OBTAINED
AU2012220526B2 (en) * 2005-04-11 2014-02-20 Omya International Ag Precipitated calcium carbonate pigment, especially for use in inkjet printing paper coatings
EP1712523A1 (en) * 2005-04-11 2006-10-18 Omya Development AG Precipitated calcium carbonate pigment, especially for use in inkjet printing paper coatings
EP1712597A1 (en) * 2005-04-11 2006-10-18 Omya Development AG Process for preparing precipitated calcium carbonate pigment, especially for use in inkjet printing pater coatings and precipitated calcium carbonate
PL2371766T3 (en) 2010-04-01 2013-07-31 Omya Int Ag Process for obtaining precipitated calcium carbonate
ES2616130T3 (en) 2013-08-20 2017-06-09 Omya International Ag Process for obtaining precipitated calcium carbonate
CN106277417A (en) * 2015-05-26 2017-01-04 有研稀土新材料股份有限公司 The method that smelting waste water comprehensive containing magnesium reclaims

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5640118B2 (en) * 1979-07-25 1981-09-18
JPH046649B2 (en) * 1983-04-27 1992-02-06 Maruo Calcium
JPS6090819A (en) * 1983-10-24 1985-05-22 Komeshiyou Sekkai Kogyo Kk Production of chain calcium carbonate from ultrafine cubic calcium carbonate

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