JP2008231586A - Coated white cardboard - Google Patents
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- JP2008231586A JP2008231586A JP2007068358A JP2007068358A JP2008231586A JP 2008231586 A JP2008231586 A JP 2008231586A JP 2007068358 A JP2007068358 A JP 2007068358A JP 2007068358 A JP2007068358 A JP 2007068358A JP 2008231586 A JP2008231586 A JP 2008231586A
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- 238000000576 coating method Methods 0.000 claims abstract description 69
- 239000011248 coating agent Substances 0.000 claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 239000000049 pigment Substances 0.000 claims abstract description 34
- 239000007787 solid Substances 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 39
- 239000011087 paperboard Substances 0.000 claims description 29
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 19
- 239000000123 paper Substances 0.000 claims description 16
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 14
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 14
- 239000005995 Aluminium silicate Substances 0.000 claims description 13
- 235000012211 aluminium silicate Nutrition 0.000 claims description 13
- 239000004408 titanium dioxide Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 238000007639 printing Methods 0.000 abstract description 23
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- 238000000034 method Methods 0.000 abstract description 17
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- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 abstract description 3
- 229910000020 calcium bicarbonate Inorganic materials 0.000 abstract description 3
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000008107 starch Substances 0.000 description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
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- -1 phosphate ester Chemical class 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 102000011632 Caseins Human genes 0.000 description 2
- 108010076119 Caseins Proteins 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 108010073771 Soybean Proteins Proteins 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 2
- 239000005018 casein Substances 0.000 description 2
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 2
- 235000021240 caseins Nutrition 0.000 description 2
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- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
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- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000011115 styrene butadiene Substances 0.000 description 2
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 241000060350 Citronella moorei Species 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004368 Modified starch Substances 0.000 description 1
- 240000003492 Neolamarckia cadamba Species 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
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- 238000007645 offset printing Methods 0.000 description 1
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- 239000002345 surface coating layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Paper (AREA)
Abstract
Description
本発明は、油性インキを用いた印刷直後のニス塗布適性を有した光沢、平滑性に優れた塗工白板紙に関するものである。 The present invention relates to a coated white paperboard having excellent gloss and smoothness, which has suitability for varnish application immediately after printing using an oil-based ink.
塗工白板紙は、主として、化粧箱や石鹸用箱、更にはギフトケース用箱等の紙器や雑誌表紙等として使用される。これらの用途においては表面の美粧性付与、表面保護のため表面にニスを塗布する場合が多い。近年、短納期化、工程削減による高効率化のために従来のオフラインでのニス塗布方式から印刷ユニットでのオーバープリンティング方式又は印刷機に付属のインラインコーター方式での印刷直後のニス塗布が行われるようになってきた。このような、印刷直後にニス塗布を行う方式において印刷面のムラを生ずることがある。 The coated white paperboard is mainly used as a paper container such as a decorative box, a soap box, a gift case box, or a magazine cover. In these applications, a varnish is often applied to the surface in order to impart a cosmetic appearance to the surface and protect the surface. In recent years, varnish coating immediately after printing is performed from the conventional offline varnishing method to the overprinting method in the printing unit or the inline coater attached to the printing machine in order to shorten the delivery time and increase the efficiency by reducing the process. It has become like this. In such a system in which varnish application is performed immediately after printing, the printed surface may be uneven.
未乾燥のインキにニス塗布を行った場合、インキの流れ現象やインキが塗布ロールに転移するトラッピング現象が起こると非特許文献１に記載されており、この様な現象は印刷面のムラを生ずる原因となる。油性インキを用いて印刷を行いオーバープリンティング方式又はインラインコーター方式でニス塗布を行う場合、インキのセット・乾燥の時間が取れないためこのような現象が生じ易い。 It is described in Non-Patent Document 1 when an ink flow phenomenon or a trapping phenomenon in which the ink is transferred to a coating roll occurs when varnish coating is applied to undried ink. Such a phenomenon causes unevenness of the printing surface. Cause. When printing is performed using oil-based ink and varnish coating is performed by an overprinting method or an inline coater method, such a phenomenon is likely to occur because it takes time to set and dry the ink.
非特許文献１には、前記問題に対しての解決手段の記述が無い。さらに、非特許文献２には、印刷及びニスの原因と対策が記述されているだけであり、根本原因である塗工白板紙からの解決手段が記載されていない。印刷及びニス塗布工程での対応も最終製品品質、作業の容易性などの面からおのずと限界があり、塗工白板紙の改良が求められている。
油性インキを用いた印刷直後にオーバープリンティング方式又はインラインコーター方式でのニス塗布を行うことによって、インキのセット・乾燥の時間が取れなくても印刷面のムラの発生のない光沢、平滑性に優れた２層以上塗工してなる塗工白板紙を提供することである。 Immediately after printing with oil-based ink, by applying varnish by overprinting method or inline coater method, excellent gloss and smoothness without unevenness of printed surface even if ink setting and drying time is not taken Another object of the present invention is to provide a coated white board which is formed by coating two or more layers.
本発明者等は、前記の課題を解決すべく鋭意努力し研究を重ねた結果、次に示す構成によって、油性インキを用いた印刷直後にオーバープリンティング方式又はインラインコーター方式でのニス塗布を行うことによる印刷面のムラの発生のない塗工白板紙を提供することを見出し、本発明を完成するに至った。 As a result of diligent efforts and research to solve the above-mentioned problems, the present inventors perform varnish application by an overprinting method or an inline coater method immediately after printing using oil-based ink by the following configuration. The present inventors have found that a coated white board having no printed surface unevenness due to the above has been found, and the present invention has been completed.
本発明は、前記課題を達成するために顔料とバインダーを主成分として含有する塗工液を２層以上塗工してなる白板紙において、顔料として重質炭酸カルシウムを全顔料の４５質量％以上を含有し、かつ、固形分濃度６４質量％以上の塗工液を最上層に塗工したものである。 In order to achieve the above object, the present invention provides a white paperboard obtained by coating two or more layers of a coating liquid containing a pigment and a binder as main components, and heavy calcium carbonate as a pigment is 45% by mass or more of the total pigment. And a coating liquid having a solid content concentration of 64% by mass or more is applied to the uppermost layer.
本発明の一つの実施態様は、前記白板紙において、顔料としてレーザー式粒度分布測定によるメジアン径０．８μｍ以下のカオリンを含有する塗工液を最上層に塗工したものである。 In one embodiment of the present invention, the white paperboard is coated on the uppermost layer with a coating solution containing kaolin having a median diameter of 0.8 μm or less as a pigment by laser particle size distribution measurement.
他の一つの実施態様は、前記白板紙において、顔料として二酸化チタンを全顔料の２０質量％以下含有する塗工液を最上層に塗工したものである。 In another embodiment, in the white paperboard, a coating liquid containing 20% by mass or less of titanium dioxide as a pigment is applied to the uppermost layer.
更に別の一つの実施態様は、前記白板紙において、塗工液を最上層にロッドコーターにて塗工したものである。 In still another embodiment, in the white paperboard, the coating liquid is applied to the uppermost layer with a rod coater.
本発明の構成を採ることによって、油性インキを用いて印刷した直後に、オーバープリンティング方式又はインラインコーター方式でのニス塗布を行うことによって、インキのセット・乾燥の時間が取れなくても印刷面のムラの発生のない塗工白板紙が得られる。斯かる効果が得られる理論的根拠は必ずしも明確ではないが、顔料主体として重質炭酸カルシウムを含有するか、又は更にカオリンを含有する最表面塗工層の構造が印刷直後にニスを塗布する極短時間での適正なインキのセットに有効に作用していると考えられる。 By adopting the configuration of the present invention, immediately after printing with oil-based ink, by performing varnish application in the overprinting method or inline coater method, the printing surface can be printed even if the time for setting and drying the ink cannot be taken. Coated white paperboard with no unevenness is obtained. Although the theoretical basis for obtaining such an effect is not necessarily clear, the structure of the outermost surface coating layer containing heavy calcium carbonate as the main component of the pigment or further containing kaolin further applies varnish immediately after printing. It is thought that it works effectively on the proper ink setting in a short time.
一つの実施態様としてロッドコーターにて本発明の塗工液を塗工することよって、ロッドコーター塗工で発生するリングパターンが軽減される。斯かる効果が得られる理論的根拠については必ずしも明確ではないが、リングパターンの発生要因としては液粘度、液表面張力、速度、ニップ隙間などの影響が知られており、塗工液の固形分濃度を高く設定することによって同一乾燥塗工量におけるロッドと基紙間の隙間が少なくなることが有効に作用したと考えられる。また、重質炭酸カルシウムが他の顔料に比較して良好な流動性を塗工液に与えることも知られており、重質炭酸カルシウム配合量の多い流動性に富む塗工液を用いることによって、ロッド出口で発生したリングパターンがその後速やかに平坦化しやすいとも考えられる。 As one embodiment, the ring pattern generated by the rod coater coating is reduced by applying the coating liquid of the present invention with a rod coater. Although the theoretical basis for obtaining such an effect is not necessarily clear, the influence of liquid viscosity, liquid surface tension, speed, nip gap, etc. is known as the cause of the ring pattern, and the solid content of the coating liquid It is considered that the effect of effectively reducing the gap between the rod and the base paper at the same dry coating amount by setting the concentration high was effective. In addition, it is also known that heavy calcium carbonate gives good fluidity to coating liquids compared to other pigments. By using a coating liquid rich in fluidity with a large amount of heavy calcium carbonate, It is also considered that the ring pattern generated at the rod outlet tends to be flattened quickly thereafter.
すなわち、最も表層の上塗り塗工液の顔料として重炭酸カルシウムを全顔料の４５質量％以上を含有せしめ、かつ、固形分濃度６４質量％以上の塗工液を塗工することによって、ロッドコーター塗工でのリングパターンが軽減され、表面のミクロな凹凸が低減され光沢、平滑性が向上するという効果を奏する。 That is, rod coater coating is carried out by adding calcium bicarbonate as a pigment of the top coat coating solution on the outermost layer in an amount of 45% by mass or more of the total pigment and applying a coating solution having a solid content concentration of 64% by mass or more. The ring pattern in the work is reduced, the micro unevenness on the surface is reduced, and the gloss and smoothness are improved.
リングパターンの発生しない塗工方式も有り、例えばブレードコーターをあげることが出来る。塗工方式により操業性および塗工白板紙の品質は同じではなく、生産効率および操作性、その製品が要求される品質などを考慮して塗工方式は選ばれる。例えばロッドコーターでは、コーターヘッド先端への異物の付着などによるストークが発生しにくく生産効率が良いが、リングパターンの発生による表面のミクロな凹凸が生じやすく光沢、平滑性が劣ることから、いずれの方式にも長所、短所があり適宜選択される。ロッドコーターにて本発明の塗工液を塗工することによって、リングパターンが軽減するので、ロッドコーターの品質面での適用範囲を広げることとなる。 There is also a coating method that does not generate a ring pattern, for example, a blade coater. The operability and the quality of the coated white paperboard are not the same depending on the coating method, and the coating method is selected in consideration of the production efficiency and operability, the quality required for the product, and the like. For example, a rod coater is less prone to stalks due to foreign matter adhering to the tip of the coater head, etc., and has high production efficiency. The method has advantages and disadvantages and is selected as appropriate. By applying the coating liquid of the present invention with a rod coater, the ring pattern is reduced, so the applicable range in terms of quality of the rod coater is expanded.
前述したように本発明の塗工白板紙は、油性インキを用いた印刷直後にオーバープリンティング方式又はインラインコーター方式でのニス塗布を行うことによって、インキのセット・乾燥の時間が取れなくても、顔料主体として重質炭酸カルシウムを含有するか、又は重質炭酸カルシウムの他に更にカオリンを含有する最表面塗工層の構造をとることによって、極短時間での適正なインキのセットが可能となり、印刷面のムラのない塗工白板紙を提供できる。 As described above, the coated white paperboard of the present invention is a varnish application in an overprinting method or an inline coater method immediately after printing using an oil-based ink, so even if the ink setting and drying time cannot be taken, Appropriate ink setting is possible in a very short time by using the structure of the outermost coating layer that contains heavy calcium carbonate as the pigment main component or kaolin in addition to heavy calcium carbonate. It is possible to provide coated white paperboard with no unevenness of the printing surface.
更に、ロッドコーターにて、重質炭酸カルシウム配合量が多い流動性に富む本発明の塗工液を用いることによって、ロッドコーター塗工においてロッド出口で発生するリングパターンがその後速やかに平坦化して光沢、平滑性に優れる塗工白板紙を提供できる。 Furthermore, by using the coating liquid of the present invention having a large amount of heavy calcium carbonate and rich in fluidity in the rod coater, the ring pattern generated at the rod outlet in the rod coater coating is then quickly flattened and glossed. The coated white paperboard having excellent smoothness can be provided.
次に、本発明の各構成要素について更に詳細に説明する。 Next, each component of the present invention will be described in more detail.
本発明において、顔料とバインダーを主成分として含有する塗工液を２度以上塗工してなる塗工白板紙において、最も表層の上塗り塗工液の顔料として重炭酸カルシウムを全顔料の４５質量％以上、好ましくは４５〜９５質量％、特に好ましくは４５〜９０質量％、なかでも４５〜８５質量％、例えば５０〜８０質量％含有せしめることが必要である。重質炭酸カルシウム含有量４５質量％未満の場合には効果が乏しい。塗工液の固形分濃度が６４質量％未満では、白紙光沢度が低く、グロスカレンダー、ソフトカレンダー等の光沢及び平滑向上装置の条件を強くした場合、塗工層が過度に密になり塗工層の透明化による白色度低下、平判オフセット印刷時のインキセット性の悪化に伴う裏付き発生の問題があるため、塗工液の固形分濃度を６４質量％以上、好ましくは６４〜７０質量％、特に好ましくは６５〜６８質量％とする必要がある。 In the present invention, in the coated white paperboard formed by coating the coating liquid containing the pigment and the binder as main components twice or more, calcium bicarbonate is 45 mass of the total pigment as the pigment of the uppermost surface coating liquid. % Or more, preferably 45 to 95% by mass, particularly preferably 45 to 90% by mass, especially 45 to 85% by mass, for example 50 to 80% by mass. When the heavy calcium carbonate content is less than 45% by mass, the effect is poor. When the solid content concentration of the coating liquid is less than 64% by mass, the glossiness of the blank paper is low, and when the gloss and soft calender gloss and smoothness improvement device conditions are strengthened, the coating layer becomes excessively dense and coating is performed. Since there is a problem of lowering of whiteness due to the transparency of the layer and occurrence of backing due to deterioration of ink setting property during flat offset printing, the solid content concentration of the coating liquid is 64% by mass or more, preferably 64 to 70% by mass. %, Particularly preferably 65 to 68% by mass.
最も表層の上塗り塗工液に含有せしめるカオリンとしては、レーザー式粒度分布測定によるメジアン径０．８μｍ以下、好ましくは０．８〜０．１μｍ、特に好ましくは０．５〜０．１μｍのカオリンであることがより好ましい。メジアン径０．８μｍ以下のカオリンを使用すると、ニス塗布後の印刷面ムラおよび白紙光沢度が更に改善されるという効果が達成される。しかしカオリンのメジアン径が０．８μｍ以上で３μｍ以下でも、重質炭酸カルシウムを全顔料の４５質量％以上使用し固形分濃度６４質量％以上の塗工液を使用すれば、ニス塗布後の印刷面ムラの実用レベルの改善がもたらされる。本発明において、最も表層の上塗り塗工液の顔料として重質炭酸カルシウムの他にカオリンを使用する場合には、その量は全顔料の５５質量％未満、好ましくは４０質量％未満である。 The kaolin to be included in the top layer topcoat coating solution is a kaolin having a median diameter of 0.8 μm or less, preferably 0.8 to 0.1 μm, particularly preferably 0.5 to 0.1 μm as measured by laser particle size distribution. More preferably. When kaolin having a median diameter of 0.8 μm or less is used, the effect of further improving the printing surface unevenness and white paper gloss after varnish application is achieved. However, even if the median diameter of kaolin is 0.8 μm or more and 3 μm or less, if a heavy calcium carbonate is used in an amount of 45% by mass or more of the total pigment and a coating liquid having a solid content concentration of 64% by mass or more is used, printing after varnish application is performed. Improvement of practical level of surface unevenness is brought about. In the present invention, when kaolin is used in addition to heavy calcium carbonate as the pigment of the topcoat coating solution on the outermost layer, the amount thereof is less than 55% by mass, preferably less than 40% by mass of the total pigment.
褪色防止、白色度の向上などのために最も表層の上塗り塗工液に顔料として含有せしめる二酸化チタンは、全顔料の２０質量％以下、好ましくは１８質量％以下、特に好ましくは１５質量％以下が有利であるが、２０質量％を超えて含有せしめると効果が低下する。しかし２５質量％以下であれば実用レベルの効果がある。 Titanium dioxide to be included as a pigment in the top layer coating solution for preventing fading and improving whiteness is 20% by mass or less, preferably 18% by mass or less, particularly preferably 15% by mass or less of the total pigment. Although it is advantageous, if the content exceeds 20% by mass, the effect decreases. However, if it is 25% by mass or less, there is a practical level effect.
次に本発明に使用する薬剤などの好ましい形態例を上げて具体的に説明する。
本発明に使用する塗工液に使用する他の顔料としては、サチンホワイト、軽質炭酸カルシウム、タルク、水酸化アルミニウム、シリカ、酸化亜鉛、活性白土、酸性白土、珪素土など通常塗工用顔料として知られているものの中から適宜使用できる。
Next, specific examples of preferred forms of the drug used in the present invention will be specifically described.
Other pigments used in the coating liquid used in the present invention include satin white, light calcium carbonate, talc, aluminum hydroxide, silica, zinc oxide, activated clay, acid clay, silicon clay, etc. It can use suitably from what is known.
本発明に使用する塗工液に使用する接着剤としては、スチレン−アクリル系、酢酸ビニル−アクリル系、ブタジエン−メチルメタクリル系、スチレン−ブタジエン系などの各種共重合体ラテックス、酸化澱粉、燐酸エステル化澱粉、ヒドロシキエチル化澱粉などの澱粉類、カゼイン、大豆蛋白などの蛋白類、ポリビニールアルコールなどのその他水性接着剤から必要に応じ単独若しくは２種類以上を選択して通常使用される量で適宜に使用できる。 Examples of the adhesive used in the coating liquid used in the present invention include various copolymer latexes such as styrene-acrylic, vinyl acetate-acrylic, butadiene-methylmethacrylic, and styrene-butadiene, oxidized starch, and phosphate ester. In the amount usually used by selecting one or more kinds from starches such as modified starch and hydroxyethylated starch, proteins such as casein and soy protein, and other aqueous adhesives such as polyvinyl alcohol as required It can be used as appropriate.
本発明の塗工液には、分散剤、増粘剤、保水剤、消泡剤、耐水化剤など通常の塗工液に配合される各種助剤を適宜使用してもよい。それらの使用量は慣用の範囲内にある。 In the coating liquid of the present invention, various auxiliaries blended in a normal coating liquid such as a dispersant, a thickener, a water retention agent, an antifoaming agent, and a water resistance-proofing agent may be used as appropriate. Their usage is in the customary range.
なお、下塗り塗工液については、特に限定されるものではなく、塗工白板紙の品質設計に応じて、適宜配合を選択できるものである。すなわち、塗工液構成としては、一般に塗工白板紙分野で使用されている顔料及び接着剤を主成分とする塗工液が用いられる。顔料としては、例えばカオリン、軽質炭酸カルシウム、重質炭酸カルシウム、サチンホワイト、タルク、水酸化アルミニウム、シリカ、酸化亜鉛、活性白土、酸性白土、珪素土などが例示できる。また、接着剤としては、例えばスチレン−アクリル系、酢酸ビニル−アクリル系、ブタジエン−メチルメタクリル系、スチレン−ブタジエン系などの各種共重合体ラテックス、酸化澱粉、燐酸エステル化澱粉、ヒドロシキエチル化澱粉などの澱粉類、カゼイン、大豆蛋白等の蛋白類、ポリビニールアルコールなどのその他水性接着剤が例示できる。また、必要に応じて、分散剤、増粘剤、保水剤、消泡剤、耐水化剤などの各種助剤を使用してもよい。これらは、何れも必要に応じ単独若しくは２種類以上を選択して使用してもよい。 The undercoat coating liquid is not particularly limited, and can be appropriately selected depending on the quality design of the coated white paperboard. That is, as a coating liquid composition, the coating liquid which has as a main component the pigment and adhesive agent which are generally used in the coating white paperboard field | area is used. Examples of the pigment include kaolin, light calcium carbonate, heavy calcium carbonate, satin white, talc, aluminum hydroxide, silica, zinc oxide, activated clay, acid clay, and silicon clay. Examples of the adhesive include various copolymer latexes such as styrene-acrylic, vinyl acetate-acrylic, butadiene-methylmethacrylic, styrene-butadiene, oxidized starch, phosphate esterified starch, hydroxyethylated starch. Examples thereof include starches such as casein, proteins such as soybean protein, and other aqueous adhesives such as polyvinyl alcohol. Moreover, you may use various adjuvants, such as a dispersing agent, a thickener, a water retention agent, an antifoamer, and a water resistance agent, as needed. Any of these may be used alone or in combination of two or more as required.
本発明の基紙としては、従来の塗工白板紙の製造に利用されている一般の基紙を特に制限なく使用することができ、例えば、坪量１５０〜６００ｇ／ｍ2 程度の多層抄板紙を用いるのが好ましい。また、基紙に使用するパルプは、通常塗工白板紙に用いるパルプが使用でき、例えば化学パルプ、機械パルプ、古紙パルプなどがある。 As the base paper of the present invention, a general base paper used for the production of a conventional coated white paperboard can be used without any particular limitation. For example, a multilayer paperboard having a basis weight of about 150 to 600 g / m 2. Is preferably used. The pulp used for the base paper can be the pulp normally used for coated white paperboard, such as chemical pulp, mechanical pulp, and waste paper pulp.
塗工方法について特に制限はなく、ブレードコーター、ロッドコーター、ロールコーターなどの通常の各種塗工装置を用い、２層以上塗工する。塗工量についても特に制限はないが、各層とも固形分で３〜２０ｇ／ｍ２が好ましい。各層を塗工する毎に、又は２層以上塗工した後乾燥する。かくして塗工、乾燥された後グロスカレンダー、ソフトカレンダー、スーパーカレンダーなどで処理を施す。 There is no restriction | limiting in particular about the coating method, Two or more layers are coated using normal various coating apparatuses, such as a blade coater, a rod coater, and a roll coater. Although there is no restriction | limiting in particular about the coating amount, As for each layer, 3-20 g / m < 2 > is preferable at solid content. Each time each layer is applied, or two or more layers are applied and then dried. Thus, after coating and drying, it is treated with a gloss calendar, soft calendar, super calendar, and the like.
次に、実施例を用い、更に詳細に本発明の効果を説明するが、本発明はこれによって限定されるものではない。なお、実施例中の「部」は、全顔料を１００質量部に対する質量部である。 Next, the effects of the present invention will be described in more detail using examples, but the present invention is not limited thereto. In addition, "part" in an Example is a mass part with respect to 100 mass parts of all pigments.
［実施例１〜５、比較例１〜３］表１に示したようにカオリン［カダム社製、商品名：アマゾンＳＢ（メジアン径０．３μｍ）及びヒューバー社製、商品名：ハイドラコートＡ（メジアン径１．３μｍ）］と、重質炭酸カルシウム［（株）イメリスミネラルズジャパン製、商品名：カービタル９０］と、二酸化チタン［デュポン社製、商品名：ＲＰＳ−Ｖａｎｔａｇｅ］と、軽質炭酸カルシウム［奥多摩工業（株）製、タバマール２２１ＧＳ］とを表１に示す割合で混合した混合顔料１００質量部に対して、接着剤としてスチレン−ブタジエン共重合体ラテックス１５質量部を配合し、更に潤滑剤としてステアリン酸カルシウム０．５質量部を配合し、本発明の実施例及び比較例の上塗り塗工液を得た。 [Examples 1 to 5, Comparative Examples 1 to 3] As shown in Table 1, kaolin [manufactured by Kadam, trade name: Amazon SB (median diameter 0.3 μm) and Huber, trade name: Hydracoat A ( Median diameter 1.3 μm)], heavy calcium carbonate [made by Imerizu Minerals Japan, trade name: Carbital 90], titanium dioxide [made by DuPont, trade name: RPS-Vantage], and light calcium carbonate [Okutama Kogyo Co., Ltd., Tabamar 221GS] is mixed with 100 parts by mass of the mixed pigment mixed in the ratio shown in Table 1, and 15 parts by mass of a styrene-butadiene copolymer latex is blended as an adhesive. As a blend, 0.5 parts by mass of calcium stearate was blended to obtain topcoat coating liquids of Examples and Comparative Examples of the present invention.
坪量３５０ｇ／ｍ２の多層抄板紙基紙に、カオリン５０質量部、重質炭酸カルシウム５０質量部、スチレン−ブタジエン共重合体ラテックス１５質量部及び燐酸エステル化澱粉３質量部からなる下塗り塗工液をロッドコーターにて固形分１０ｇ／ｍ２になるように塗工、乾燥した下塗り塗工基紙に対して、表１に示す上塗り塗工液を固形分１０ｇ／ｍ２となるようにロッドコーター又はブレードコーターで塗工、乾燥した。さらに、グロスカレンダーで処理し、塗工白板紙を得た。 Undercoat coating comprising 50 parts by weight of kaolin, 50 parts by weight of heavy calcium carbonate, 15 parts by weight of styrene-butadiene copolymer latex and 3 parts by weight of phosphate esterified starch on a multilayer paperboard base paper having a basis weight of 350 g / m 2 applying a liquid to a solid content of 10 g / m 2 by a rod coater, the dry undercoating coated base paper, the rod so that the overcoat coating solution shown in Table 1 and solids 10 g / m 2 It was coated and dried with a coater or blade coater. Furthermore, it processed with the gloss calendar and obtained the coated white board paper.
［評価試験］実施例及び比較例によって得られた各塗工白板紙について評価を行った。
１）メジアン径：堀場製作所製ＬＡ９２０型で測定した。
２）二ス塗布後の印刷面ムラ：ＲＩ印刷試験機を用いオフセット用油性インキをベタ刷りした後、直ちに水性ニスを塗布し、熱風乾燥機にて乾燥後目視にて印刷面のムラを目視にて評価した。
◎：ムラの発生が無い。
○：ムラの発生が僅かに認められる。
△：ムラの発生が多く認められる。
×：ムラの発生が非常に多く認められる。
３）リングパターン：塗工板紙表面を５０倍の顕微鏡で観察し塗工方向の筋状パターンを目視にて評価した。
◎：パターンの発生が無い。
○：パターンの発生が僅かに認められる。
△：パターンの発生が多く認められる。
×：パターンの発生が非常に多く認められる。
４）白紙光沢度：ＪＩＳ Ｐ ８１４２：2005「紙及び板紙−75度鏡面光沢度の測定方法」に従い、村上色彩研究所製の光沢度計を用い、角度７５度で測定した。
５）ストリーク:塗工時のコーターヘッド出口の塗工面を目視にて評価した。
◎：ストリークの発生が全く無い。
○：ストリークの発生が稀に認められる。
△：ストリークの発生が多く認められる。
×：ストリークの発生が非常に多く認められる。
[Evaluation Test] Each coated white paperboard obtained by Examples and Comparative Examples was evaluated.
1) Median diameter: Measured with a model LA920 manufactured by Horiba, Ltd.
2) Unevenness of printed surface after application of bis: Immediately after application of offset oil-based ink using an RI printing tester, water-based varnish is applied, and after drying with a hot air dryer, visually observed unevenness of the printed surface. Evaluated.
A: There is no occurrence of unevenness.
○: Slight occurrence of unevenness is observed.
Δ: Many irregularities are observed.
X: Generation | occurrence | production of a nonuniformity is recognized very much.
3) Ring pattern: The surface of the coated paperboard was observed with a 50 × microscope, and the streak pattern in the coating direction was visually evaluated.
A: No pattern is generated.
○: Slight occurrence of pattern is observed.
Δ: Many patterns are observed.
X: Generation | occurrence | production of a pattern is recognized very much.
4) Gloss on white paper: Measured at 75 degrees using a gloss meter manufactured by Murakami Color Research Laboratory according to JIS P 8142: 2005 “Paper and paperboard—Measurement method of 75 degree specular gloss”.
5) Streak: The coating surface at the coater head outlet during coating was visually evaluated.
A: There is no streak.
○: Streak is rarely observed.
Δ: Many streaks are observed.
X: Very many streaks are observed.
表１から以下のことが分かる。即ち、実施例１〜５と比較例２および３との比較から、重質炭酸カルシウムを４５質量％以上含有する実施例１〜５の場合には、ニス塗布後の印刷面ムラもなく、白紙光沢度も優れ、かつ、リングパターンも生じないが、重質炭酸カルシウムを含まないかその含有量が５０質量％未満である比較例２および３の場合には、ニス塗布後の印刷ムラが多くまたは非常に多く認められ、リングパターンも多くまたは非常に多く認められることが分かる。実施例３と比較例１を比較すると、顔料組成が同一であるにも関わらず、塗工液固形分濃度が比較例１の場合には、６２質量％と６４質量％より少ないために、白紙光沢度が悪く、かつ、リングパターンが非常に多く認められることが判ります。 Table 1 shows the following. That is, from the comparison between Examples 1 to 5 and Comparative Examples 2 and 3, in Examples 1 to 5 containing 45% by mass or more of heavy calcium carbonate, there is no unevenness of the printed surface after varnish application, and blank paper In the case of Comparative Examples 2 and 3 where the glossiness is excellent and no ring pattern is produced but the heavy calcium carbonate is not contained or the content thereof is less than 50% by mass, the printing unevenness after varnish application is large. Or, it can be seen that a large amount is recognized and a ring pattern is also recognized a lot or very much. When Example 3 and Comparative Example 1 are compared, the coating liquid solid content concentration is less than 62% by mass and 64% by mass in the case of Comparative Example 1 even though the pigment composition is the same. It can be seen that the glossiness is poor and there are many ring patterns.
実施例１および２と実施例３とを比較すれば明らかな通り、顔料としてのカオリンのメジアン径が１．３μｍと０．８μｍより大きいと、実用範囲にはあるとはいえ、メジアン径が０．８μｍより小さい実施例１および２の場合のほうがニス塗布後の印刷面ムラが認められないことが分かる。 As is clear from comparison between Examples 1 and 2 and Example 3, when the median diameter of kaolin as a pigment is larger than 1.3 μm and 0.8 μm, the median diameter is 0 although it is in the practical range. It can be seen that in the case of Examples 1 and 2 smaller than 0.8 μm, the printed surface unevenness after varnish application is not recognized.
実施例４と５を比較すると、両者は二酸化チタン含有量およびメジアン径０．８μｍより小さいカオリンの使用量が相違するが、他の条件は全く同一である。しかし二酸化チタン含有量が２０質量％以下である実施例４の場合の方が、二酸化チタン含有量が２０質量％より多い（２２質量％）実施例５の場合よりも、ニス塗布後の印刷面ムラが発生しないことがわかる。 Comparing Examples 4 and 5, both differ in titanium dioxide content and the amount of kaolin used less than the median diameter of 0.8 μm, but the other conditions are exactly the same. However, in the case of Example 4 in which the titanium dioxide content is 20% by mass or less, the printed surface after varnish application is more than in the case of Example 5 in which the titanium dioxide content is more than 20% by mass (22% by mass). It can be seen that unevenness does not occur.
実施例１と実施例２とを比較すると、両者はコーター方式が相違するだけである。ブレードコーター方式を使用した実施例２の場合の方が、リングパターンの発生が全くないが、しかし、ストリークの発生が実施例１より多いことが判ります。 When Example 1 and Example 2 are compared, they differ only in the coater system. In the case of Example 2 using the blade coater method, there is no ring pattern at all. However, it can be seen that there are more streaks than in Example 1.
Claims (4)
て、顔料として重質炭酸カルシウムを全顔料の４５質量％以上含有し、かつ、
固形分濃度６４質量％以上の塗工液を最上層に塗工することを特徴とする塗工白板紙。 In white paperboard formed by coating two or more layers of a coating liquid containing a pigment and a binder as main components, containing heavy calcium carbonate as a pigment in an amount of 45% by mass or more of the total pigment, and
A coated white paperboard, wherein a coating liquid having a solid content concentration of 64% by mass or more is applied to the uppermost layer.
て、顔料としてレーザー式粒度分布測定によるメジアン径０．８μｍ以下のカオリンを含有する塗工液を最上層に塗工することを特徴とする請求項１記載の塗工白板紙。 In white paperboard, which is coated with two or more layers of a coating liquid containing pigment and binder as main components, the top layer is a coating liquid containing kaolin with a median diameter of 0.8 μm or less as measured by laser particle size distribution measurement. The coated white paperboard according to claim 1, wherein the coated whiteboard paper is coated on the paper.
て、顔料二酸化チタンを全顔料の２０質量％以下含有する塗工液を最上層に塗工することを特徴とする請求項１または２記載の塗工白板紙。 In white paperboard that is formed by coating two or more layers of a coating liquid containing pigment and binder as main components, a coating liquid containing 20% by mass or less of pigment titanium dioxide is applied to the uppermost layer. The coated white paperboard according to claim 1 or 2, characterized in that:
て、塗工液を最上層にロッドコーターにて塗工することを特徴とする請求項１から３のいずれか一つに記載の塗工白板紙。 4. The white board made by coating two or more layers of a coating liquid containing pigment and binder as main components, wherein the coating liquid is coated on the uppermost layer with a rod coater. Coated white paperboard as described in any one.
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| JP2007068358A Active JP4986663B2 (en) | 2007-03-16 | 2007-03-16 | Coated white paperboard |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012062580A (en) * | 2010-09-14 | 2012-03-29 | Oji Paper Co Ltd | Coated white paperboard |
| JP2012122166A (en) * | 2010-12-09 | 2012-06-28 | Oji Paper Co Ltd | Coated white paperboard |
| JP2012136806A (en) * | 2010-12-27 | 2012-07-19 | Oji Paper Co Ltd | Coated white cardboard |
| JP2012158844A (en) * | 2011-01-31 | 2012-08-23 | Hokuetsu Kishu Paper Co Ltd | White paperboard |
| JP2014152405A (en) * | 2013-02-05 | 2014-08-25 | Hokuetsu Kishu Paper Co Ltd | Forgery prevention paper |
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| JPH11158798A (en) * | 1997-11-28 | 1999-06-15 | Oji Paper Co Ltd | Coated white paperboard |
| JPH11241296A (en) * | 1998-02-25 | 1999-09-07 | Oji Paper Co Ltd | Coated white paperboard |
| JP2005200805A (en) * | 2004-01-19 | 2005-07-28 | Hokuetsu Paper Mills Ltd | Coated whiteboard paper |
| JP2006233371A (en) * | 2005-02-25 | 2006-09-07 | Mitsubishi Paper Mills Ltd | Coated paper and method for producing the same |
| JP2006257590A (en) * | 2005-03-18 | 2006-09-28 | Hokuetsu Paper Mills Ltd | Coated paper for printing and method for producing the same |
| JP2006328574A (en) * | 2005-05-24 | 2006-12-07 | Oji Paper Co Ltd | Coated white paperboard |
| JP2007046189A (en) * | 2005-08-10 | 2007-02-22 | Nippon Paper Industries Co Ltd | Coated paper for printing |
| JP2007254914A (en) * | 2006-03-23 | 2007-10-04 | Oji Paper Co Ltd | Coated white board paper |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11158798A (en) * | 1997-11-28 | 1999-06-15 | Oji Paper Co Ltd | Coated white paperboard |
| JPH11241296A (en) * | 1998-02-25 | 1999-09-07 | Oji Paper Co Ltd | Coated white paperboard |
| JP2005200805A (en) * | 2004-01-19 | 2005-07-28 | Hokuetsu Paper Mills Ltd | Coated whiteboard paper |
| JP2006233371A (en) * | 2005-02-25 | 2006-09-07 | Mitsubishi Paper Mills Ltd | Coated paper and method for producing the same |
| JP2006257590A (en) * | 2005-03-18 | 2006-09-28 | Hokuetsu Paper Mills Ltd | Coated paper for printing and method for producing the same |
| JP2006328574A (en) * | 2005-05-24 | 2006-12-07 | Oji Paper Co Ltd | Coated white paperboard |
| JP2007046189A (en) * | 2005-08-10 | 2007-02-22 | Nippon Paper Industries Co Ltd | Coated paper for printing |
| JP2007254914A (en) * | 2006-03-23 | 2007-10-04 | Oji Paper Co Ltd | Coated white board paper |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012062580A (en) * | 2010-09-14 | 2012-03-29 | Oji Paper Co Ltd | Coated white paperboard |
| JP2012122166A (en) * | 2010-12-09 | 2012-06-28 | Oji Paper Co Ltd | Coated white paperboard |
| JP2012136806A (en) * | 2010-12-27 | 2012-07-19 | Oji Paper Co Ltd | Coated white cardboard |
| JP2012158844A (en) * | 2011-01-31 | 2012-08-23 | Hokuetsu Kishu Paper Co Ltd | White paperboard |
| JP2014152405A (en) * | 2013-02-05 | 2014-08-25 | Hokuetsu Kishu Paper Co Ltd | Forgery prevention paper |
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|---|---|
| JP4986663B2 (en) | 2012-07-25 |
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