WO2006057062A1 - 塗工紙用炭酸カルシウム顔料及びその顔料を用いた塗工紙 - Google Patents
塗工紙用炭酸カルシウム顔料及びその顔料を用いた塗工紙 Download PDFInfo
- Publication number
- WO2006057062A1 WO2006057062A1 PCT/JP2004/017737 JP2004017737W WO2006057062A1 WO 2006057062 A1 WO2006057062 A1 WO 2006057062A1 JP 2004017737 W JP2004017737 W JP 2004017737W WO 2006057062 A1 WO2006057062 A1 WO 2006057062A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- calcium carbonate
- pigment
- coated paper
- hydroxide
- aluminum sulfate
- Prior art date
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP 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
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
Definitions
- Calcium carbonate pigment for coated paper and coated paper using the pigment
- the present invention relates to a coating pigment for commercial printing paper, and particularly to a calcium carbonate pigment for coated paper having a glossy effect and a coated paper using the pigment. .
- kaolin clay hereinafter referred to as clay
- calcium carbonate occupy most of coating pigments for commercial printing paper.
- Other pigments include titanium dioxide and aluminum hydroxide, calcined clay, and satin white (3CaO'AlO-3CaSO ⁇ 31 ⁇ ).
- clay is excellent in gloss, but ink absorption, whiteness and opacity are inferior.
- Calcium carbonate is excellent in ink absorption, whiteness, opacity and low adhesiveness, but is inferior in gloss. Therefore, conventionally, coating pigments have been formulated using clay and other auxiliary pigments such as calcium carbonate in a form that compensates for the disadvantages of clay.
- Patent Document 1 As a technology related to the improvement of the glossiness of calcium carbonate, Patent Document 1 below aims to provide a facial material that is excellent in clay in whiteness, opacity and printability, and gives a quality close to satin white.
- an invention relating to a pigment mainly composed of calcium carbonate, slaked lime (calcium hydroxide) and sulfate band (aluminum sulfate) is disclosed. It has been shown that results superior to those of (American Angel Noordone) and calcium carbonate were slightly inferior to those of satin white.
- Patent Document 2 listed below is excellent in blister resistance, ink acceptability, printing gloss, and the like.
- a synthetic pigment obtained by dispersing calcium carbonate in a hydrum hydroxide dispersion and adding aluminum sulfate to it is used.
- the coated paper it was shown that the same gloss of offset printing gloss was obtained when 40% of the synthetic pigment was replaced with 100% pigment-mixed clay.
- Patent Document 1 Japanese Patent Publication No. 48-43367 (Specifications, pages 1 and 2)
- Patent Document 2 Japanese Patent Application Laid-Open No. 48-22705 (Specification, page 2, page 3, Example 1, Example 2) Disclosure of Invention
- the glossiness of the pigment is superior to that of HT clay and calcium carbonate, but is slightly inferior to that of satin white, or equivalent to offset printing glossiness in terms of glossiness.
- the inventor of the present application as a coating pigment for commercial printing paper that should solve the above-mentioned problems of the prior art, has a particularly satisfactory glossy calcium carbonate for coated paper.
- the toner pigment and its production method the inventors have found that the predetermined characteristics can be satisfied, and have completed the present invention.
- the present invention overcomes the shortcomings of the conventional pigments containing calcium carbonate described above, and is particularly glossy and ink-absorbing in coated paper quality using calcium carbonate pigments. They are trying to provide calcium carbonate pigments for coated paper that are excellent for commercial printing paper.
- the present invention is also intended to provide a coated paper for commercial printing paper that uses the calcium carbonate pigment and is particularly excellent in gloss development and ink absorbability.
- the invention of the coated paper of claim 2 is provided on the surface of the calcium carbonate fine particles.
- It is characterized in that it is a coated paper in which a coating liquid containing a calcium carbonate pigment is applied to the surface of the base paper.
- the calcium carbonate pigment solid content is preferably 3% by mass to 100% by mass with respect to the total pigment solid content in the coating liquid.
- the solid content of calcium carbonate is less than 3% by mass, the effects of ink absorptivity, whiteness, and low adhesion provided by the calcium carbonate pigment are not achieved.
- the upper limit may be 100% by mass, but calcium carbonate is preferably not more than 70% by mass because glossiness is not good. The invention's effect
- the high-speed coater is operated at a higher solid content in order to reduce drying load and prevent deterioration of ink setting, so the viscosity of the coating solution is important. Therefore, measure the following two types of viscosities.
- Low shear viscosity Measure at 60 rpm with a Brookfield viscometer (model LVT). Shows the fluidity of the piping solution for coating liquid.
- High shear viscosity Measured at 4400 rpm using Bob F25 with a Nocureless viscometer (model DV-10). The fluidity of the coating liquid in a high-speed machine coater head is shown.
- Leo mouth Gee characteristic is at least “ ⁇ Z good” ⁇ Glossiness 65% or higher
- Leo mouth Gee characteristic is at least “ ⁇ Z good” ⁇ Glossiness 65% or higher
- Leo mouth G-characteristic is at least “ ⁇ / practical range” ⁇ Glossiness 60% or higher
- Example 1 the method for producing the pigment and the coating liquid will be described in detail.
- the blending ratio is 50% calcium carbonate, 50% Z clay.
- the coating solution was prepared according to the following procedure using a laboratory mixer (trade name: Dispermat model F105) at a rotational speed of 2000 rpm.
- Step 1 Collect 50% equivalent amount of calcium carbonate.
- Step 2 Add 0.4 parts of dispersant (Triperse N40, trade name) and stir for 1 minute.
- Step 3 Add 0.3 parts of aluminum sulfate and stir for 15 minutes to cover the surface of each calcium carbonate particle.
- Step 4 Add NaOH with a pH8 target and stir for 5 minutes.
- Step 5 Add clay (Miragloss 91, trade name) equivalent to 50% pigment and stir for 40 minutes.
- Step 6 Add 0.4 parts of carboxymethylcellulose CMC (Finfix 2, trade name) and stir for 5 minutes.
- Step 7 Add 12.5 parts of latex (Styronal D776, trade name) and stir for 2 minutes.
- Step 8 Add 1.25 parts of lubricant (LB Coat 132, trade name) and stir for 1 minute.
- Step 9 Add 0.25 part of insolubilizing agent (Bacote L, trade name) and stir for 1 minute.
- Step 10 Add 1 part of fluorescent whitening agent (Sinai White SK, trade name) and stir for 1 minute.
- Step 11 Add 0.05 part of antifoam (Nopco 267A, trade name) and stir for 1 minute. Finally, stir again for 15 minutes to homogenize.
- the solid content, low shear one viscosity, and high shear one viscosity are measured.
- the paper was passed once through the GEBR KERSTEN BV test calendar made by Eerbeek of the Netherlands at a gauge pressure of 294N (30kgf / cm 2 ) and a roll temperature of 70 ° C.
- Measure absorbency K & N method
- Example 1-7 and Comparative Examples 1, 1'1, 3, and 3 ' first, calcium carbonate was treated with 0.3 part of aluminum sulfate relative to calcium carbonate solids, and then stirred with a pH of 8 target.
- Example 1 is sodium hydroxide (NaOH)
- Example 2 is potassium hydroxide (K OH)
- Example 3 is ammonium hydroxide (NH OH)
- Example 4 is NaOH + KOH
- Example 5 is NaOH + NH OH
- Example 6 is (KOH + NH OH)
- Example 7 is (NaOH + K
- Additives were sequentially added to the composition shown in Table 1 and stirring was repeated to prepare a coating solution.
- the term “added at pH 8 target” means that the term “hydroxide” is added to a calcium carbonate slurry to which aluminum sulfate has been added so that the pH of the slurry becomes 8 while stirring. It means the gradual addition of an aqueous alkaline solution containing at least one selected from sodium hydroxide, potassium hydroxide, and ammonium hydroxide. If an aqueous alkali solution is added rapidly, precipitation of aluminum hydroxide may occur.
- Comparative Example 1 1 ′ 3 3 ′ belongs to the prior art.
- the rheological properties of the coating liquid of Example 17 belong to the range of high shear viscosity 42000 65000dyneZcm 2 , low shear viscosity 1500-22 OOcps, and are “ ⁇ Z good”.
- the rheo-mouth property improves with the increase of calcium carbonate according to the present invention in the pigment formulation.
- the rheological properties of the coating liquid of Comparative Example 13 belong to the range of high shear viscosity 13000 16000dyneZcm 2 and low shear viscosity 500—l lOOcps, which is “ ⁇ / excellent”, but Comparative Example 1 '3'
- the rheological properties of the coating liquid are the same pigment, but the solid content of the pigment is slightly higher. It became impossible. It can be said that the rheological properties of calcium carbonate, Z hydroxide, and calcium pigment coating solutions are unstable. In addition, since the rheological properties are deteriorated, a high solid content of the coating liquid cannot be obtained, and a high-speed coating machine cannot be applied due to an excessive drying load.
- Example 1-17-1 is 3. 1-3.5
- Comparative Example 1-13-1 is 2.6-6-1
- the comparative example is inferior by one rank. In the measurement of glossiness, it was 67.0-68.0 in Example 1-11, whereas it was 34.1-14.4 in Comparative Example 1-13-1 and the example was overwhelming.
- the pigment according to the present invention [(calcium carbonate + aluminum sulfate treatment) + alkaline treatment with NaOH, etc.] is clearly compared with the comparative pigment [(calcium carbonate + hydroxide calcium) + aluminum sulfate treatment]. It can be seen that the expression effect is high.
- Example 1-11 The whiteness is 85.8-87.3 in Example 1-11, whereas it is 87.1-88.0 in Comparative Example 1-13, which is slightly inferior to Example 1-17-1. .
- the overall evaluation is “0 Z good” in all of Examples 1-17, whereas it is “out of XZ practical range” in Comparative Examples 1, 1 ′, 1-3, and 3 ′.
- Examples 8-13 first, calcium carbonate was treated with aluminum sulfate, and then with the ⁇ 8 target, Examples 8 and 9 were sodium hydroxide (NaOH), and Examples 10 and 11 were potassium hydroxide. (KOH), Examples 12 and 13 are ammonium hydroxide (NH OH)
- the rheological properties of the coating liquids of Examples 8 to 13 belong to the range of high shear viscosity 45000 84000dyneZcm 2 and low shear viscosity 20000 to 3600cps, and are generally “Good Z”. Is in the practical range.
- the rheological properties of the coating solution of Comparative Example 4 are “ ⁇ / practical range” with a high shear viscosity of 65000 dyneZcm 2 and a low shear viscosity of 3800 cps. Further, in comparison with Examples 8-13, the rheological properties tend to improve as the calcium carbonate content increases.
- Example 8-13 In the characteristics of coated paper, the ink absorbency (K & N) in Example 8-13 was 2. 6-2. 9 “ ⁇ ⁇ practical range”, while Comparative Example 4 was 2.2 “ ⁇ ⁇ practical. 1 rank inferior in “out of range”. The whiteness is 84.5-86.1 in Example 8-13, while it is 85.2 in Comparative Example 4, almost the same level. The glossiness is 69. 6-70.8 in Examples 8-13, while it is 71.6 in Comparative Example 4, which is slightly inferior to the examples and there is no significant difference between them. In the present invention, up to about 30% of calcium carbonate can be replaced with clay.
- Example 15 A double-sided single-coated paperboard grade on machine coater was used.
- the pigment content was 35% of calcium carbonate 65% Z clay of the present invention, the glossiness after calendaring was 71%, and the K & N was 4.
- Comparative Example 6 was a normal pigment formulation, with a carbonated power of 50% Z-clay 50%, a gloss of 71% after calendering, and a K & N of 2.5. As a result, Example 15 was superior.
- the content of aluminum sulfate in the calcium carbonate slurry is 0.3 parts by mass with respect to 100 parts by mass of calcium carbonate solids. 1 part by mass or more is required. If the aluminum sulfate content is less than 0.1 parts by mass, the desired effect will not be achieved, and the upper limit is not a critical limit, but it will not precipitate even if too much! Aluminum sulfate is not contained in the slurry. It should be stopped at 1 part by mass at the most because it becomes useless.
- the mechanism of glossiness of calcium carbonate in the present invention has not been theoretically clarified, but the aluminum sulfate covering the surface of the calcium carbonate particles is added with an alkali such as sodium hydroxide or sodium hydroxide. It reacts with potassium and forms colloidal aluminum hydroxide containing some sulfates and deposits on the surface of each calcium carbonate particle.
- alkali such as sodium hydroxide or sodium hydroxide. It reacts with potassium and forms colloidal aluminum hydroxide containing some sulfates and deposits on the surface of each calcium carbonate particle.
- aluminum hydroxide is a pigment having a gloss effect, and it is considered that it contributed to the gloss development property of calcium carbonate.
- a calcium carbonate pigment for coated paper that is excellent in gloss development and ink absorbency is provided, and printing is performed by using this pigment. It is possible to provide coated paper for commercial printing that can sometimes obtain a good image quality with good gloss, which has a great industrial application effect.
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006546522A JP4570627B2 (ja) | 2004-11-29 | 2004-11-29 | 塗工紙用炭酸カルシウム顔料及びその顔料を用いた塗工紙 |
CNA2004800445141A CN101068980A (zh) | 2004-11-29 | 2004-11-29 | 涂料纸用碳酸钙颜料和采用该颜料的涂料纸 |
PCT/JP2004/017737 WO2006057062A1 (ja) | 2004-11-29 | 2004-11-29 | 塗工紙用炭酸カルシウム顔料及びその顔料を用いた塗工紙 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/017737 WO2006057062A1 (ja) | 2004-11-29 | 2004-11-29 | 塗工紙用炭酸カルシウム顔料及びその顔料を用いた塗工紙 |
Publications (1)
Publication Number | Publication Date |
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WO2006057062A1 true WO2006057062A1 (ja) | 2006-06-01 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/017737 WO2006057062A1 (ja) | 2004-11-29 | 2004-11-29 | 塗工紙用炭酸カルシウム顔料及びその顔料を用いた塗工紙 |
Country Status (3)
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JP (1) | JP4570627B2 (ja) |
CN (1) | CN101068980A (ja) |
WO (1) | WO2006057062A1 (ja) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4822705B1 (ja) * | 1964-12-07 | 1973-07-07 | ||
JPS4843367B1 (ja) * | 1970-08-28 | 1973-12-18 | ||
JPH0770985A (ja) * | 1993-08-30 | 1995-03-14 | New Oji Paper Co Ltd | キャスト塗被紙 |
JPH07300797A (ja) * | 1994-04-27 | 1995-11-14 | New Oji Paper Co Ltd | キャスト塗被紙の製造方法 |
JPH07324299A (ja) * | 1994-05-31 | 1995-12-12 | New Oji Paper Co Ltd | キャスト塗被紙の製造方法 |
JP2003020223A (ja) * | 2001-07-03 | 2003-01-24 | Nittetsu Mining Co Ltd | 複合粒子及びその製造方法、並びに該複合粒子を配合した複合組成物及び複合体 |
JP2003137544A (ja) * | 2001-08-20 | 2003-05-14 | Nittetsu Mining Co Ltd | 無機又は金属微粒子−炭酸カルシウム複合粒子の製造方法、並びに該複合粒子を含有する複合組成物及び複合体 |
JP2003321221A (ja) * | 2002-04-30 | 2003-11-11 | Nippon Paper Industries Co Ltd | 繊維状物質で表面が被覆された炭酸カルシウム |
-
2004
- 2004-11-29 WO PCT/JP2004/017737 patent/WO2006057062A1/ja active Application Filing
- 2004-11-29 JP JP2006546522A patent/JP4570627B2/ja not_active Expired - Fee Related
- 2004-11-29 CN CNA2004800445141A patent/CN101068980A/zh active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4822705B1 (ja) * | 1964-12-07 | 1973-07-07 | ||
JPS4843367B1 (ja) * | 1970-08-28 | 1973-12-18 | ||
JPH0770985A (ja) * | 1993-08-30 | 1995-03-14 | New Oji Paper Co Ltd | キャスト塗被紙 |
JPH07300797A (ja) * | 1994-04-27 | 1995-11-14 | New Oji Paper Co Ltd | キャスト塗被紙の製造方法 |
JPH07324299A (ja) * | 1994-05-31 | 1995-12-12 | New Oji Paper Co Ltd | キャスト塗被紙の製造方法 |
JP2003020223A (ja) * | 2001-07-03 | 2003-01-24 | Nittetsu Mining Co Ltd | 複合粒子及びその製造方法、並びに該複合粒子を配合した複合組成物及び複合体 |
JP2003137544A (ja) * | 2001-08-20 | 2003-05-14 | Nittetsu Mining Co Ltd | 無機又は金属微粒子−炭酸カルシウム複合粒子の製造方法、並びに該複合粒子を含有する複合組成物及び複合体 |
JP2003321221A (ja) * | 2002-04-30 | 2003-11-11 | Nippon Paper Industries Co Ltd | 繊維状物質で表面が被覆された炭酸カルシウム |
Also Published As
Publication number | Publication date |
---|---|
CN101068980A (zh) | 2007-11-07 |
JP4570627B2 (ja) | 2010-10-27 |
JPWO2006057062A1 (ja) | 2008-06-05 |
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