JP2007204856A - Coated paper for printing - Google Patents
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- Publication number
- JP2007204856A JP2007204856A JP2006021603A JP2006021603A JP2007204856A JP 2007204856 A JP2007204856 A JP 2007204856A JP 2006021603 A JP2006021603 A JP 2006021603A JP 2006021603 A JP2006021603 A JP 2006021603A JP 2007204856 A JP2007204856 A JP 2007204856A
- Authority
- JP
- Japan
- Prior art keywords
- printing
- coated paper
- paper
- surface layer
- polymer latex
- 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.)
- Pending
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Abstract
【課題】白紙光沢度、白紙表面性、印刷光沢および印刷適性に優れた印刷用塗被紙を提供する。
【解決手段】支持体の少なくとも片面に顔料塗被層を有し、その顔料塗被層上に、ガラス転移温度（Ｔｇ）が４０℃以上８０℃未満である熱可塑性重合体ラテックスおよびコロイダルシリカを含有する表面層を有する印刷用塗被紙であって、前記表面層がカレンダー処理されている、もしくは光沢処理をしていないことを特徴とする。前記熱可塑性重合体ラテックスの平均粒子径が８０〜４００ｎｍであることが好ましい。
【選択図】なしThe present invention provides a coated paper for printing excellent in white paper glossiness, white paper surface properties, print gloss and printability.
A thermoplastic polymer latex and colloidal silica having a pigment coating layer on at least one surface of a support, and having a glass transition temperature (Tg) of 40 ° C. or more and less than 80 ° C. on the pigment coating layer. A coated paper for printing having a surface layer to be contained, wherein the surface layer is calendered or not glossy. It is preferable that the thermoplastic polymer latex has an average particle size of 80 to 400 nm.
[Selection figure] None
Description
本発明は、印刷用塗被紙に関するものである。 The present invention relates to a coated paper for printing.
一般に印刷用塗被紙は、原紙上に顔料と接着剤を主成分とする水性塗被組成物を塗被、乾燥して製造され、塗被組成物の塗被量や塗被紙の仕上げ方法によって、キャストコート紙、アート紙、コート紙、微塗工紙等に分類される。これら塗被紙は、これに多色印刷又は単色印刷を施して、チラシ、パンフレット、ポスター等の商業用印刷物として、あるいは書籍、雑誌等の出版物として広く使用されている。近年、印刷物のビジュアル化、カラー化が進み、印刷用塗被紙の光沢度や平滑性等の外観が以前にも増して重要視されている。
印刷用塗被紙の白紙光沢度は、キャストコート紙が最も高く、次いでアート紙、コート紙、微塗工紙の順で低くなる。光沢度の最も高いキャストコート紙は、鏡面ドラムを有するキャストコーターにて製造されるが、顔料および接着剤を主成分とするキャスト用塗被液を原紙上に塗被した後、湿潤可塑状態にある間に加熱した鏡面ドラムに圧接、乾燥後、離型させて強光沢仕上げをするため、一般のアート紙およびコート紙に比べて製造速度がかなり遅いという問題がある。
In general, a coated paper for printing is produced by coating an aqueous coating composition mainly composed of a pigment and an adhesive on a base paper and then drying it. The coating amount of the coating composition and the finishing method of the coated paper Are classified into cast coated paper, art paper, coated paper, fine coated paper, and the like. These coated papers are subjected to multicolor printing or single color printing, and are widely used as commercial printed materials such as flyers, brochures and posters, or as publications such as books and magazines. In recent years, the visualization and colorization of printed matter has progressed, and the appearance such as glossiness and smoothness of coated paper for printing has become more important than ever.
The blank gloss of the coated paper for printing is highest in cast coated paper, and then decreases in the order of art paper, coated paper, and finely coated paper. The cast coated paper with the highest glossiness is manufactured by a cast coater having a mirror drum, but after applying a coating liquid for casting mainly composed of a pigment and an adhesive on the base paper, it is in a wet plastic state. Since it is pressed against a heated mirror drum for a while, dried, and then released to give a high gloss finish, there is a problem that the production speed is considerably slower than that of general art paper and coated paper.
この問題を解決するため、特定のモノマー組成を有する重合体ラテックスを使用した塗被液を原紙上に塗被、乾燥後に加熱した鏡面ドラムに圧接する方法（特許文献１、２を参照）が提案されている。これらの方法によると、一般のキャストコート紙に比べて製造速度は向上するが、それでも、一般のアート紙およびコート紙の製造速度に比べると、かなり遅いレベルに留まっている。 In order to solve this problem, a method is proposed in which a coating liquid using a polymer latex having a specific monomer composition is coated on a base paper and pressed against a heated mirror drum after drying (see Patent Documents 1 and 2). Has been. According to these methods, the production speed is improved as compared with general cast-coated paper, but it is still at a much lower level than the production speed of general art paper and coated paper.
また、高光沢紙を得る方法として、特定のガラス転移温度を有する重合体ラテックスを使用した塗被液を原紙に塗被、乾燥し、該重合体ラテックスのガラス転移温度以上で加熱カレンダーに圧着する方法（特許文献３を参照）、特定の重合体ラテックスと特定の離型剤を含有する塗被液を原紙上に塗被、乾燥し、高温カレンダー処理する方法（特許文献４を参照）、特定のカオリンおよび中空プラスチックピグメントを含有する塗被液を原紙上に塗被、乾燥し、熱カレンダー処理する方法（特許文献５を参照）が提案されている。
また、特定のプラスチックピグメントを含有する塗被液を原紙上に塗被、乾燥し、スーパーカレンダーで表面仕上げする方法（特許文献６を参照）、プラスチックピグメントおよびサチンホワイトを含有する塗被液をブレードにて塗被して製造する方法（特許文献７を参照）、特定のプラスチックピグメントおよび特定のサチンホワイトを含有した塗被液を原紙上に塗被、乾燥し、加熱カレンダー処理する方法（特許文献８を参照）等も提案されている。
これらの方法によれば、製造速度も速く、生産性に優れるが、何れの方法においても、アート紙並みの高い光沢度を得るためには、高価な原材料を多量に使用する必要があるため、製造コストが高くなる問題があり、また、キャストコート紙に匹敵するような高い光沢度を得ることはできないのが現状である。
In addition, as a method for obtaining high gloss paper, a coating liquid using a polymer latex having a specific glass transition temperature is coated on a base paper, dried, and pressure-bonded to a heating calendar above the glass transition temperature of the polymer latex. A method (see Patent Document 3), a method of coating a coating liquid containing a specific polymer latex and a specific release agent on a base paper, drying and high-temperature calendaring (see Patent Document 4), specific There has been proposed a method (see Patent Document 5) in which a coating liquid containing kaolin and hollow plastic pigment is coated on a base paper, dried, and subjected to a thermal calendar treatment.
In addition, a coating solution containing a specific plastic pigment is coated on a base paper, dried, and surface-finished with a super calender (see Patent Document 6), and a coating solution containing plastic pigment and satin white is bladed (Patent Document 7), and a coating solution containing a specific plastic pigment and a specific satin white is coated on a base paper, dried, and subjected to a heat calendar process (Patent Document) 8) is also proposed.
According to these methods, the production speed is fast and the productivity is excellent, but in any method, in order to obtain a glossiness as high as art paper, it is necessary to use a large amount of expensive raw materials, There is a problem that the manufacturing cost becomes high, and the present situation is that a high gloss level comparable to cast-coated paper cannot be obtained.
更に、別の方法として、原紙上に、最低造膜温度の異なる熱可塑性合成樹脂の２種あるいはそれ以上の混合物からなる塗被層を設ける方法（特許文献９を参照）、支持体上に顔料塗工層を設けた基材の顔料塗工層上に、二次転移温度が８０℃以上の熱可塑性重合体ラテックスからなる表面層を有する印刷用塗被紙であって、前記表面層が二次転移温度以下でカレンダー処理されている方法（特許文献１０を参照）、支持体の少なくとも一面に顔料含有層を有し、その顔料含有層上に平均粒径が１００ｎｍ以下、二次転移温度が８０℃以上の熱可塑性重合体ラテックス粒子を含有する表面層を設け、その表面層がカレンダー処理されていない方法（特許文献１１を参照を参照）、支持体上に顔料塗工層を設けた基材の顔料塗工層上に、ガラス転移温度が８０℃以上の熱可塑性重合体ラテックスと表面サイズ剤を有する表面層を設ける方法（特許文献１２を参照）、特定原紙上に塗工層を設けた印刷用塗被紙において、塗被組成物中に特定量のコロイダルシリカが配合された方法（特許文献１３を参照）が提案されているが、白紙光沢度、白紙表面性、印刷光沢および印刷適性において、更なる改善が求められている。 Furthermore, as another method, a method of providing a coating layer made of a mixture of two or more thermoplastic synthetic resins having different minimum film forming temperatures on a base paper (see Patent Document 9), a pigment on a support. A coated paper for printing having a surface layer made of a thermoplastic polymer latex having a secondary transition temperature of 80 ° C. or more on a pigment coating layer of a base material provided with a coating layer, wherein the surface layer comprises two layers A method in which a calendar treatment is performed at a temperature lower than or equal to the next transition temperature (see Patent Document 10), a support having a pigment-containing layer on at least one surface, an average particle size of 100 nm or less on the pigment-containing layer, and a secondary transition temperature A method in which a surface layer containing thermoplastic polymer latex particles of 80 ° C. or higher is provided, and the surface layer is not calendered (see Patent Document 11), a base in which a pigment coating layer is provided on a support On the pigment coating layer of the material. A method of providing a surface layer having a thermoplastic polymer latex having a temperature of 80 ° C. or higher and a surface sizing agent (see Patent Document 12), and a coating paper for printing in which a coating layer is provided on a specific base paper. Although a method in which a specific amount of colloidal silica is blended in a product has been proposed (see Patent Document 13), further improvement is required in terms of blank paper glossiness, blank paper surface properties, print gloss, and printability. .
本発明は、白紙光沢度、白紙表面性、印刷光沢および印刷適性に優れた印刷用塗被紙を提供するものである。 The present invention provides a coated paper for printing excellent in white paper glossiness, white paper surface properties, print gloss and printability.
本発明は、支持体の少なくとも片面に顔料塗被層を有し、その顔料塗被層上に、ガラス転移温度（Ｔｇ）が４０℃以上８０℃未満である熱可塑性重合体ラテックスおよびコロイダルシリカを含有する表面層を有する印刷用塗被紙であって、前記表面層がカレンダー処理されていることを特徴とする。
本発明は、支持体の少なくとも片面に顔料塗被層を有し、その顔料塗被層上に、ガラス転移温度（Ｔｇ）が４０℃以上８０℃未満である熱可塑性重合体ラテックスおよびコロイダルシリカを含有する表面層を有する印刷用塗被紙であって、前記表面層が光沢処理をせずに仕上げられていることを特徴とする。
前記熱可塑性重合体ラテックスの平均粒子径が８０〜４００ｎｍであることが好ましい。
前記熱可塑性重合体ラテックスとコロイダルシリカが、質量比で３０：７０〜９０：１０であることが好ましい。
前記表面層の乾燥後の塗被量が片面あたり０．１〜４ｇ／ｍ２であることが好ましい。
前記表面層がブレードコーターで形成されたものであることが好ましい。
The present invention comprises a thermoplastic polymer latex and colloidal silica having a pigment coating layer on at least one side of a support, and having a glass transition temperature (Tg) of 40 ° C. or more and less than 80 ° C. on the pigment coating layer. A printing coated paper having a surface layer to be contained, wherein the surface layer is calendered.
The present invention comprises a thermoplastic polymer latex and colloidal silica having a pigment coating layer on at least one side of a support, and having a glass transition temperature (Tg) of 40 ° C. or more and less than 80 ° C. on the pigment coating layer. A coated paper for printing having a surface layer contained therein, wherein the surface layer is finished without being subjected to a gloss treatment.
It is preferable that the thermoplastic polymer latex has an average particle size of 80 to 400 nm.
The thermoplastic polymer latex and colloidal silica are preferably 30:70 to 90:10 by mass ratio.
The coating amount after drying of the surface layer is preferably 0.1 to 4 g / m 2 per side.
The surface layer is preferably formed by a blade coater.
本発明に係る印刷用塗被紙は、白紙光沢度、白紙表面性、印刷光沢および印刷適性に優れたものである。 The coated paper for printing according to the present invention is excellent in white paper glossiness, white paper surface properties, print gloss and printability.
上記の如き実状より、本発明者等は印刷用塗被紙に関し、品質面、生産性の両面において優れた印刷用塗被紙を得るべく鋭意研究を行った。その結果、支持体の少なくとも片面に顔料塗被層を有し、その顔料塗被層上に、特定の熱可塑性重合体ラテックスおよびコロイダルシリカを含有する表面層を設けることにより、前記表面層を設けていない場合と比較して、印刷適性を実用上、損なうことなく、白紙光沢度、白紙表面性、印刷光沢および印刷適性に優れた印刷用塗被紙が得られることを見出し、本発明を完成するに至った。なお、表面層については、カレンダー処理を施しても、光沢処理を施さなくてもよい。 From the actual situation as described above, the inventors of the present invention have made extensive studies to obtain a coated paper for printing that is excellent in terms of both quality and productivity. As a result, at least one side of the support has a pigment coating layer, and the surface layer is provided by providing a surface layer containing a specific thermoplastic polymer latex and colloidal silica on the pigment coating layer. As a result, it was found that a coated paper for printing excellent in white paper glossiness, white paper surface property, print gloss and printability could be obtained without impairing printability practically. It came to do. In addition, about a surface layer, even if it performs a calendar process, it does not need to perform a glossy process.
本発明において最も重要な点は、表面層の成分として、特定の熱可塑性重合体ラテックスとコロイダルシリカとを組み合わせることであり、これによりオフセット印刷、グラビア印刷等の印刷において、均一で、かつ好ましいインキ吸収性を持たせることが可能となった。また、カレンダー処理を施す場合、カレンダーロール汚れを改良することができるようになった。 In the present invention, the most important point is to combine a specific thermoplastic polymer latex and colloidal silica as a component of the surface layer, and thereby a uniform and preferable ink in printing such as offset printing and gravure printing. It became possible to give absorbency. Moreover, when carrying out a calendar process, it became possible to improve the calendar roll stain.
一般的に、熱可塑性重合体ラテックスは、乾燥過程においてラテックス粒子同士が融着して成膜する。本発明において使用する熱可塑性重合体ラテックスのガラス転移温度は４０℃以上８０℃未満であり、より好ましくは４５℃以上７５℃以下である。本発明では、成膜性の低い熱可塑性重合体ラテックスを使用し、乾燥過程においてクラックを形成させてインキ吸収性を持たせるものであるが、熱可塑性重合体ラテックスの単独使用では、クラックを均一に形成することは難しく、不均一なクラックが原因でインキ吸収ムラが発生する問題があり、インキ吸収ムラによるインキ着肉ムラを改善することが大きな課題である。本発明においては、コロイダルシリカを併用することにより、表面層に、微細なクラックを均一に形成させることができ、インキ吸収ムラを抑制し、インキ着肉ムラを改善させることが可能となった。 In general, a thermoplastic polymer latex is formed by fusing latex particles together in a drying process. The glass transition temperature of the thermoplastic polymer latex used in the present invention is 40 ° C. or higher and lower than 80 ° C., more preferably 45 ° C. or higher and 75 ° C. or lower. In the present invention, a thermoplastic polymer latex having a low film formability is used, and cracks are formed in the drying process to provide ink absorbency. However, when the thermoplastic polymer latex is used alone, the cracks are uniform. However, it is difficult to form the ink, and there is a problem that uneven ink absorption occurs due to non-uniform cracks, and it is a big problem to improve uneven ink deposition due to uneven ink absorption. In the present invention, by using colloidal silica in combination, fine cracks can be uniformly formed on the surface layer, and ink absorption unevenness can be suppressed and ink unevenness unevenness can be improved.
以下に、本発明の詳細について述べる。
本発明の表面層に使用する熱可塑性重合体ラテックスは、熱可塑性を示す重合体あるいは共重合体のエマルジョンである。熱可塑性重合体ラテックスを構成する単量体の種類や製造方法については特に限定するものではなく、ガラス転移温度が４０℃以上８０℃未満の範囲になるように調整されればよい。
Details of the present invention will be described below.
The thermoplastic polymer latex used in the surface layer of the present invention is a polymer or copolymer emulsion exhibiting thermoplasticity. There is no particular limitation on the type of monomer constituting the thermoplastic polymer latex and the production method, and it may be adjusted so that the glass transition temperature is in the range of 40 ° C. or more and less than 80 ° C.
本発明で使用する熱可塑性重合体ラテックスとしては、例えば、１，３−ブタジエン、２−メチル−１，３−ブタジエン等の脂肪族共役ジエン系モノマー、スチレン、α−メチルスチレン等の芳香族ビニルモノマー、アクリル酸、メタクリル酸、イタコン酸、フマル酸、マレイン酸等のエチレン系不飽和酸モノマー、アクリル酸メチル、アクリル酸エチル等の不飽和カルボン酸エステル、アクリロニトリル、メタクリロニトリル等のエチレン系不飽和ニトリル化合物、アクリルアミド、メタクリルアミド等の不飽和カルボン酸のアミドおよびその誘導体等を重合して得られる重合体が挙げられる。なお、本発明の熱可塑性重合体ラテックスは、必要に応じて２種類以上のモノマーを併用した共重合体であってもよいし、更にこれら重合体あるいは共重合体の置換誘導体であってもよい。置換誘導体としては、例えばカルボキシル化したもの等が挙げられる。 Examples of the thermoplastic polymer latex used in the present invention include aliphatic conjugated diene monomers such as 1,3-butadiene and 2-methyl-1,3-butadiene, and aromatic vinyl such as styrene and α-methylstyrene. Monomers, ethylenically unsaturated acid monomers such as acrylic acid, methacrylic acid, itaconic acid, fumaric acid, and maleic acid, unsaturated carboxylic acid esters such as methyl acrylate and ethyl acrylate, and ethylenically unsaturated monomers such as acrylonitrile and methacrylonitrile. Examples thereof include polymers obtained by polymerizing amides of unsaturated carboxylic acids such as saturated nitrile compounds, acrylamide and methacrylamide, and derivatives thereof. The thermoplastic polymer latex of the present invention may be a copolymer using two or more kinds of monomers in combination, if necessary, or may be a substituted derivative of these polymers or copolymers. . Examples of substituted derivatives include carboxylated derivatives.
本発明で使用する、ガラス転移温度が４０℃以上８０℃未満の熱可塑性重合体ラテックスは、表面層の全固形分に対して、２０〜９０質量％程度であり、３０〜８０質量％程度が好ましい。 The thermoplastic polymer latex having a glass transition temperature of 40 ° C. or more and less than 80 ° C. used in the present invention is about 20 to 90% by mass and about 30 to 80% by mass with respect to the total solid content of the surface layer. preferable.
熱可塑性重合体ラテックスのガラス転移温度が４０℃未満の場合は、前記ラテックス自体の粘着性が強く、表面層をカレンダー処理する場合はカレンダーロールへの貼り付きが発生し、安定して生産できない問題が発生するため、好ましくない。なお、カレンダーロールへの貼り付きを防止するため、一般的に滑剤や離型剤等の添加剤を併用するが、熱可塑性重合体ラテックスのガラス転移温度が４０℃未満の場合は、滑剤や離型剤等の添加剤を併用しても、カレンダーロールへの貼り付きを完全に改善することはできない。また、表面層のカレンダー処理がある場合、光沢処理がない場合に関係なく、熱可塑性重合体ラテックスのガラス転移温度が４０℃未満の場合、成膜性が強く、オフセット印刷、グラビア印刷等の印刷において、印刷インキの吸収が阻害されるため、インキ乾燥性不良から引き起こされる問題、例えば裏移りやブロッキング等が発生するため、好ましくない。 When the glass transition temperature of the thermoplastic polymer latex is less than 40 ° C., the latex itself is highly sticky, and when the surface layer is calendered, sticking to the calender roll occurs and the problem cannot be stably produced. Is not preferable. In order to prevent sticking to the calender roll, additives such as lubricants and mold release agents are generally used together. However, when the glass transition temperature of the thermoplastic polymer latex is less than 40 ° C., the lubricant or release agent is used. Even when an additive such as a mold is used in combination, sticking to the calendar roll cannot be completely improved. In addition, when the surface layer has a calendering treatment, the glass transition temperature of the thermoplastic polymer latex is less than 40 ° C., regardless of the absence of the glossing treatment, and the film formability is strong, and printing such as offset printing and gravure printing is possible. However, since absorption of printing ink is inhibited, problems caused by poor ink drying properties, such as set-off and blocking, are generated, which is not preferable.
一方、熱可塑性重合体ラテックスのガラス転移温度が８０℃以上であると、表面層と、表面層と接する顔料塗被層との接着力が弱く、カレンダーロールに表面層が取られるため好ましくない。また、表面層において、カレンダー処理がある場合、光沢処理がない場合に関係なく、表面強度が低下し、オフセット印刷、グラビア印刷等の印刷において、ピッキングやブランケットパイリング等の表面強度に関連した問題が発生する恐れがあり、インキ着肉ムラが実用上、問題となる場合がある。 On the other hand, if the glass transition temperature of the thermoplastic polymer latex is 80 ° C. or higher, the adhesive force between the surface layer and the pigment coating layer in contact with the surface layer is weak, and the surface layer is taken on the calendar roll, which is not preferable. In addition, when the surface layer has a calendar treatment, the surface strength is lowered regardless of the absence of a gloss treatment, and in printing such as offset printing and gravure printing, there are problems related to surface strength such as picking and blanket piling. This may occur, and uneven ink deposition may become a problem in practical use.
本発明では、表面層の成分として、ガラス転移温度（Ｔｇ）が４０℃以上８０℃未満である熱可塑性重合体ラテックスを使用するものであるが、発明の効果を阻害しない程度に、ガラス転移温度が４０℃未満、８０℃以上の熱可塑性重合体ラテックスを使用することもできる。 In the present invention, a thermoplastic polymer latex having a glass transition temperature (Tg) of 40 ° C. or higher and lower than 80 ° C. is used as a component of the surface layer. A thermoplastic polymer latex having a temperature of less than 40 ° C. and 80 ° C. or higher can also be used.
また、本発明に使用する熱可塑性重合体ラテックスの平均粒子径については、特に限定されるものではないが、塗被液の被覆性や白紙光沢発現性の点で、８０〜４００ｎｍの範囲の平均粒子径が特に好ましく、１８０〜３８０ｎｍがより好ましい。なお、平均粒子径は、熱可塑性重合体ラテックスを含む試料を透過型電子顕微鏡にて倍率５万倍で写真撮影し、得られた顕微鏡写真から熱可塑性重合体ラテックス粒子約２００個の粒子径を測定し、数平均で求めたものである。 Further, the average particle diameter of the thermoplastic polymer latex used in the present invention is not particularly limited, but it is an average in the range of 80 to 400 nm in terms of the coating liquid covering property and white paper glossiness. The particle diameter is particularly preferable, and 180 to 380 nm is more preferable. The average particle size is obtained by taking a sample containing a thermoplastic polymer latex with a transmission electron microscope at a magnification of 50,000 times, and obtaining a particle size of about 200 thermoplastic polymer latex particles from the obtained micrograph. Measured and determined by number average.
平均粒子径が８０〜４００ｎｍの範囲であれば、白紙光沢度、白紙表面性、印刷光沢および印刷適性（特にインキ着肉性）が良好な印刷用塗被紙を得ることができる。 When the average particle diameter is in the range of 80 to 400 nm, a coated paper for printing having a good white paper glossiness, white paper surface property, printing gloss, and printability (particularly ink depositability) can be obtained.
次に、本発明に使用するコロイダルシリカは、一般的に平均粒子径が３〜１００ｎｍであり、コロイダルシリカの水分散体と有機溶媒、例えばメタノール等のアルコール類に分散されたものがあり、本願発明では、前者のコロイダルシリカの水分散体が好ましく使用される。なお、平均粒子径は、コロイダルシリカを含む試料を透過型電子顕微鏡にて倍率２０万倍で写真撮影し、得られた顕微鏡写真からコロイダルシリカ粒子約２００個の粒子径を測定し、数平均で求めたものである。 Next, the colloidal silica used in the present invention generally has an average particle diameter of 3 to 100 nm, and is dispersed in an aqueous dispersion of colloidal silica and an organic solvent such as alcohol such as methanol. In the invention, the former aqueous dispersion of colloidal silica is preferably used. The average particle size is obtained by taking a photograph of a sample containing colloidal silica with a transmission electron microscope at a magnification of 200,000 times, measuring the particle size of about 200 colloidal silica particles from the obtained micrograph, and calculating the number average. It is what I have sought.
コロイダルシリカは、印刷用塗被紙に一般的に使用される塗被用顔料に比べて、平均粒子径が３〜１００ｎｍと小さいため、顔料形状による平滑性低下がなく、高い白紙光沢を発現すると同時に、カレンダー処理におけるカレンダーロールからの離型性に優れる特性を有する。さらに、重要な特性として、表面層に微細なクラックを均一に形成させることが挙げられる。 Colloidal silica has a small average particle diameter of 3 to 100 nm as compared with coating pigments generally used for printing coated papers, so that there is no reduction in smoothness due to the pigment shape, and high white paper gloss is exhibited. At the same time, it has the property of excellent releasability from the calendar roll in calendar processing. Furthermore, as an important characteristic, it can be mentioned that fine cracks are uniformly formed in the surface layer.
本発明で使用する、コロイダルシリカは、表面層の全固形分に対して、１０〜８０質量％程度であり、２０〜７０質量％程度が好ましい。 The colloidal silica used by this invention is about 10-80 mass% with respect to the total solid of a surface layer, and about 20-70 mass% is preferable.
熱可塑性重合体ラテックスとコロイダルシリカの質量比については、特に限定されるものではないが、３０：７０〜９０：１０の範囲が好ましく、３５：６５〜８０：２０の範囲がより好ましい。熱可塑性重合体ラテックスとコロイダルシリカの質量比が３０：７０〜９０：１０の範囲内であれば、カレンダー処理をおこなう場合は、カレンダーロール汚れが良好であり、表面層において、カレンダー処理がある場合、光沢処理がない場合に関係なく、白紙光沢度、白紙表面性、印刷光沢および印刷適性に優れた印刷用塗被紙を得ることができる。 The mass ratio of the thermoplastic polymer latex to the colloidal silica is not particularly limited, but is preferably in the range of 30:70 to 90:10, and more preferably in the range of 35:65 to 80:20. When the mass ratio of the thermoplastic polymer latex to the colloidal silica is within the range of 30:70 to 90:10, when performing the calendar process, the calendar roll stain is good and the surface layer has the calendar process. Regardless of the absence of the gloss treatment, it is possible to obtain a coated paper for printing excellent in white paper glossiness, white paper surface properties, print gloss, and printability.
また、コロイダルシリカは、エチレン性不飽和結合を有するモノマーを重合してなる重合体成分（以下、エチレン性重合体という）とＳｉ−Ｏ−Ｒ（Ｒ：エチレン性重合体成分）結合によって複合体になった形で使用してもよい。例えば、コロイダルシリカの存在下でエチレン性不飽和結合を有するモノマーを従来の乳化重合法で重合して得られる複合体で、特開昭５９−７１３１６号公報、特開昭６０−１２７３７１号公報に記載される如き複合体が挙げられる。 Colloidal silica is a composite formed by polymer component (hereinafter referred to as ethylenic polymer) obtained by polymerizing a monomer having an ethylenically unsaturated bond and Si—O—R (R: ethylenic polymer component) bond. You may use it in the form. For example, a composite obtained by polymerizing a monomer having an ethylenically unsaturated bond in the presence of colloidal silica by a conventional emulsion polymerization method is disclosed in JP-A-59-71316 and JP-A-60-127371. Complexes as described are mentioned.
本発明においては、上記の如き特定のガラス転移温度をもった熱可塑性重合体ラテックスと、コロイダルシリカだけを含有する水性塗被液を塗被、乾燥して表面層を形成させることもできるが、その効果を損なわない範囲で必要に応じて、上記以外の熱可塑性重合体ラテックスや、酸化澱粉、エステル化澱粉等の各種澱粉類、ポリビニルアルコール等の合成樹脂接着剤、カゼイン、大豆蛋白、合成蛋白等の蛋白類、カルボキシセルロースやメチルセルロース等のセルロース誘導体等を併用することができる。また、白色度、インキ受理性、耐ブロッキング性、粘度、流動性等を調整するために、一般に印刷用塗被紙の作製に使用されている顔料、分散剤、増粘剤、滑剤、消泡剤、着色剤、染料、帯電防止剤、防腐剤等の各種助剤を適宜添加することもできる。 In the present invention, a thermoplastic polymer latex having a specific glass transition temperature as described above and an aqueous coating solution containing only colloidal silica can be applied and dried to form a surface layer. If necessary, as long as the effect is not impaired, thermoplastic polymer latex other than the above, various starches such as oxidized starch and esterified starch, synthetic resin adhesives such as polyvinyl alcohol, casein, soy protein, synthetic protein Etc., cellulose derivatives such as carboxycellulose and methylcellulose, and the like can be used in combination. In addition, pigments, dispersants, thickeners, lubricants, antifoams generally used in the preparation of coated paper for printing to adjust whiteness, ink acceptability, blocking resistance, viscosity, fluidity, etc. Various auxiliary agents such as a colorant, a colorant, a dye, an antistatic agent, and an antiseptic can be added as appropriate.
特に、滑剤については、カレンダー処理における長時間の連続操業性を改善するため、添加することが好ましい。滑剤としては、例えば、ステアリン酸、オレイン酸等の脂肪酸およびそのアンモニウム塩や金属塩、ポリエチレンエマルジョン等の炭化水素類、セチルアルコール、ステアリルアルコール等の高級アルコール、含フッ素界面活性剤等各種界面活性剤、ロート油、レシチン、四フッ化エチレンポリマーやエチレン−四フッ化エチレンポリマー等のフッ素系ポリマー等が挙げられる。 In particular, it is preferable to add a lubricant in order to improve long-term continuous operability in the calendar process. Examples of the lubricant include fatty acids such as stearic acid and oleic acid and ammonium salts and metal salts thereof, hydrocarbons such as polyethylene emulsion, higher alcohols such as cetyl alcohol and stearyl alcohol, and various surfactants such as fluorine-containing surfactants. , Funnel oil, lecithin, fluorine-based polymers such as tetrafluoroethylene polymer and ethylene-tetrafluoroethylene polymer.
本発明では、印刷用塗被紙の塗被層に一般に用いられる顔料と接着剤を主成分とする水性塗被組成物を塗被、乾燥して得られた顔料塗被層上に表面層を形成させるが、表面層の乾燥後の塗被量については片面あたり０．１〜４ｇ／ｍ２が好ましく、０．３〜３．５ｇ／ｍ２がより好ましい。０．１〜４ｇ／ｍ２の範囲であれば、目標とする白紙光沢度、白紙表面性、印刷光沢および印刷適性に優れた印刷用塗被紙を得ることができる。 In the present invention, a surface layer is formed on a pigment coating layer obtained by coating and drying an aqueous coating composition mainly composed of a pigment and an adhesive which are generally used for a coating layer of a printing coated paper. Although it forms, about 0.1-4 g / m < 2 > is preferable per side about the coating amount after drying of a surface layer, and 0.3-3.5 g / m < 2 > is more preferable. If it is the range of 0.1-4 g / m < 2 >, the coated paper for printing excellent in the target white paper glossiness, white paper surface property, printing glossiness, and printability can be obtained.
本発明の表面層を設ける際に使用する水性塗被液の塗被装置については、特に限定はなく、当業界で一般的に使用されているトレーリング、フレキシブル、ロールアプリケーション、ファウンテンアプリケーション、ショートドゥエル等のベベルタイプやベントタイプのブレードコーター、エアーナイフコーター、バーコーター、ロッドブレードコーター、チャンプフレックスコーター、ゲートロールコーター、グラビアコーター、スプレーコーター等の塗工装置が適宜使用できる。中でも、ブレードコーターを用いると、平滑性の高い表面層を得ることができ、白紙光沢度、白紙表面性、印刷光沢および印刷適性、特にインキ着肉ムラに優れた印刷用塗被紙を得られると同時に、塗被速度が比較的速いことから、効率よく生産することができ、好ましい。勿論、これらの装置はオンマシンでもよく、オフマシンであってもよい。
なお、湿潤塗被層を乾燥する方法としては、例えば、蒸気乾燥、ガスヒーター乾燥、電気ヒーター乾燥、赤外線ヒーター乾燥等の各種方式が採用できる。
There is no particular limitation on the coating apparatus for the aqueous coating liquid used when the surface layer of the present invention is provided, and trailing, flexible, roll application, fountain application, and short dwell commonly used in the industry. Coating devices such as bevel type and vent type blade coaters, air knife coaters, bar coaters, rod blade coaters, champ flex coaters, gate roll coaters, gravure coaters, spray coaters and the like can be used as appropriate. Above all, when a blade coater is used, a surface layer with high smoothness can be obtained, and a coated paper for printing excellent in blank paper glossiness, blank paper surface properties, print gloss and printability, particularly excellent inking unevenness of ink can be obtained. At the same time, since the coating speed is relatively fast, it can be produced efficiently, which is preferable. Of course, these devices may be on-machine or off-machine.
In addition, as a method of drying a wet coating layer, various systems, such as vapor | steam drying, gas heater drying, electric heater drying, infrared heater drying, etc. are employable, for example.
本発明の印刷用塗被紙は、得られる印刷用塗被紙の白紙品質、印刷品質および印刷適性を考慮して、表面層の形成後に、各種キャレンダー装置にて平滑化処理をおこなってもよい。使用可能なキャレンダー装置としては、スーパーキャレンダー、ソフトキャレンダー、グロスキャレンダ等のグロス仕上げをするキャレンダー装置を挙げることができる。また、キャレンダー仕上げ条件としては、剛性ロールの温度、キャレンダー圧力、ニップ数、ロール速度、キャレンダー前の紙水分等が、要求される品質に応じて適宜調整される。キャレンダー装置は、コーターと別であるオフタイプと、コーターと一体となっているオンタイプがあるが、どちらを採用しても差し支えない。使用するキャレンダー装置の材質は、剛性ロールでは金属もしくはその表面に硬質クロムメッキ等で鏡面処理したロールである。弾性ロールはウレタン樹脂、エポキシ樹脂、ポリアミド樹脂、フェノール樹脂、ポリアクリレート樹脂等の樹脂ロール、コットン、ナイロン、アスベスト、アラミド繊維等を成型したロールが適宜使用される。なお、キャレンダーによる仕上げ後の塗被紙の調湿、加湿のための水塗り装置、静電加湿装置、蒸気加湿装置等を適宜組合せて使用することも勿論可能である。 The printing coated paper of the present invention may be subjected to a smoothing process with various calendar devices after the surface layer is formed in consideration of the blank paper quality, printing quality and printing suitability of the resulting printing coated paper. Good. Examples of the calendar device that can be used include a calendar device that performs gloss finish such as a super calendar, a soft calendar, and a gloss calendar. As the calender finishing conditions, the temperature of the rigid roll, the calender pressure, the number of nips, the roll speed, the paper moisture before the calender, and the like are appropriately adjusted according to the required quality. There are two types of calendar devices: the off type, which is different from the coater, and the on type, which is integrated with the coater. The material of the calendar apparatus to be used is a roll which is mirror-finished with a metal or a hard chrome plating on the surface of a rigid roll. As the elastic roll, a roll obtained by molding a resin roll such as urethane resin, epoxy resin, polyamide resin, phenol resin, or polyacrylate resin, cotton, nylon, asbestos, aramid fiber, or the like is appropriately used. It should be noted that it is of course possible to use a suitable combination of a water coating device, an electrostatic humidifying device, a steam humidifying device, etc., for humidity control and humidification of the coated paper after finishing with a calendar.
次に、本発明に使用する原紙について述べる。本発明の印刷用塗被紙に使用する原紙は、特に限定されるものではなく、下記の材料が本発明の所望の効果を妨げない範囲において適宜選択して使用される。 Next, the base paper used in the present invention will be described. The base paper used for the coated paper for printing of the present invention is not particularly limited, and the following materials are appropriately selected and used as long as the desired effects of the present invention are not hindered.
パルプとしては、例えば、一般に使用されているＬＢＫＰやＮＢＫＰ等の漂白化学パルプ、砕木パルプ（ＧＰ）、加圧式砕木パルプ（ＰＧＷ）、リファイナ砕木パルプ（ＲＧＰ）、サーモメカニカルパルプ（ＴＭＰ）等の機械パルプ、脱墨古紙パルプ（ＤＩＰ）、損紙などが適宜混合使用される。また、ケナフ等の非木材繊維原料から得られるパルプ繊維、合成パルプ、無機繊維等の１種又は２種以上を原紙に配合することもできる。機械パルプやＤＩＰは、必要に応じて漂白して使用することもでき、漂白の程度も任意に行うことができる。なお、パルプの漂白には、塩素ガスのような分子状塩素や二酸化塩素のような塩素化合物を使用しない漂白工程を採用することが、環境保全の観点から好ましく、このような漂白工程を経たパルプとしては、ＥＣＦパルプやＴＣＦパルプを挙げることができる。 Examples of the pulp include generally used bleached chemical pulps such as LBKP and NBKP, ground wood pulp (GP), pressurized ground wood pulp (PGW), refined ground wood pulp (RGP), and thermomechanical pulp (TMP). Pulp, deinked waste paper pulp (DIP), waste paper, and the like are appropriately mixed and used. Moreover, 1 type, or 2 or more types, such as a pulp fiber obtained from non-wood fiber raw materials, such as kenaf, a synthetic pulp, an inorganic fiber, can also be mix | blended with a base paper. Mechanical pulp and DIP can be used after being bleached if necessary, and the degree of bleaching can be arbitrarily performed. For bleaching pulp, it is preferable to use a bleaching process that does not use molecular chlorine such as chlorine gas or chlorine compounds such as chlorine dioxide from the viewpoint of environmental conservation. Pulp that has undergone such bleaching process is used. Examples thereof include ECF pulp and TCF pulp.
原紙に内添される填料としては、例えば、重質炭酸カルシウム、軽質炭酸カルシウム、亜硫酸カルシウム、石膏、タルク、カオリン、クレー、焼成カオリン、ホワイトカーボン、非晶質シリカ、デラミカオリン、ケイソウ土、炭酸マグネシウム、二酸化チタン、水酸化アルミニウム、水酸化カルシウム、水酸化マグネシウム、水酸化亜鉛等の無機顔料や尿素ホルマリン樹脂微粒子、微小中空粒子等の有機顔料等が例示でき、古紙や損紙等に含まれる填料も再使用できる。填料は２種以上の混合使用も可能である。填料の配合量は、一般に、紙（原紙）灰分が３〜２０質量％の範囲となるように添加される。 Examples of the filler internally added to the base paper include heavy calcium carbonate, light calcium carbonate, calcium sulfite, gypsum, talc, kaolin, clay, calcined kaolin, white carbon, amorphous silica, delaminated kaolin, diatomaceous earth, carbonic acid. Examples include inorganic pigments such as magnesium, titanium dioxide, aluminum hydroxide, calcium hydroxide, magnesium hydroxide, and zinc hydroxide, and organic pigments such as urea formalin resin fine particles and fine hollow particles, and are included in waste paper and waste paper. The filler can also be reused. Two or more fillers can be used in combination. The blending amount of the filler is generally added so that the paper (base paper) ash content is in the range of 3 to 20% by mass.
なお、原紙中にはパルプや填料の他に、内添サイズ剤、アニオン性、ノニオン性、カチオン性あるいは両性の歩留り向上剤、濾水性向上剤、紙力増強剤、嵩高剤等で例示される各種の抄紙用内添助剤を、必要に応じて添加することができる。内添サイズ剤の具体例としては、例えば、アルキルケテンダイマー系、アルケニル無水コハク酸系、スチレン−アクリル系、高級脂肪酸系、石油樹脂系サイズ剤、ロジン系サイズ剤等が挙げられる。また、歩留り向上剤、濾水性向上剤、紙力増強剤の具体例としては、例えば、アルミニウム等の多価金属化合物（具体的には、硫酸バンド、塩化アルミニウム、アルミン酸ソーダ、塩基性アルミニウム化合物等）、各種澱粉類、ポリアクリルアミド、尿素樹脂、ポリアミド・ポリアミン樹脂、ポリエチレンイミン、ポリアミン、ポリビニルアルコール、ポリエチレンオキサイド等が例示できる。また、嵩高剤の具体例としては、高級アルコールのエチレンオキサイド付加物、高級アルコールのプロピレンオキサイド付加物、高級アルコールのブチレンオキサイド付加物、多価アルコールと脂肪酸のエステル化合物等のノニオン界面活性剤、脂肪族ポリアミドアミン、ポリアルキレングリコール等が例示できる。 In addition to the pulp and filler, the base paper is exemplified by an internal sizing agent, an anionic, nonionic, cationic or amphoteric yield improver, drainage improver, paper strength enhancer, bulkiness agent and the like. Various types of internal additive for papermaking can be added as necessary. Specific examples of the internally added sizing agent include alkyl ketene dimer, alkenyl succinic anhydride, styrene-acrylic, higher fatty acid, petroleum resin sizing agent, rosin sizing agent and the like. Specific examples of yield improvers, drainage improvers, and paper strength enhancers include, for example, polyvalent metal compounds such as aluminum (specifically, sulfate bands, aluminum chloride, sodium aluminate, basic aluminum compounds). Etc.), various starches, polyacrylamide, urea resin, polyamide / polyamine resin, polyethyleneimine, polyamine, polyvinyl alcohol, polyethylene oxide and the like. Specific examples of bulking agents include higher alcohol ethylene oxide adducts, higher alcohol propylene oxide adducts, higher alcohol butylene oxide adducts, nonionic surfactants such as polyhydric alcohol and fatty acid ester compounds, fats Group polyamidoamines, polyalkylene glycols and the like.
本発明の印刷用塗被紙に使用する原紙の坪量は、一般的には、３０〜４００ｇ／ｍ２程度の範囲に適宜調整する。また、原紙の抄造条件は特に限定はない。抄紙機としては、例えば、長網式抄紙機、ギャップフォーマー型抄紙機、円網式抄紙機、短網式抄紙機等の商業規模の抄紙機が、目的に応じて適宜選択して使用できる。抄紙方式としては、酸性抄紙、中性抄紙、弱アルカリ性抄紙等のいずれの方式でも良いが、近年、紙の保存性が要求されることから、中性抄紙により抄紙された原紙が好ましい。また、表面強度を向上させるため、澱粉、ポリビニルアルコール、ポリアクリルアミド等の表面サイズ溶液をサイズプレスしたり、さらに原紙の表面平滑性を改良するために、表面サイズ液には後述のような、一般に顔料塗被層用水性塗被液に使用する顔料を配合した表面サイズ液を使用してもよい。 In general, the basis weight of the base paper used for the coated paper for printing of the present invention is appropriately adjusted in the range of about 30 to 400 g / m 2 . Moreover, the papermaking conditions of the base paper are not particularly limited. As the paper machine, for example, a commercial paper machine such as a long paper machine, a gap former paper machine, a circular paper machine, or a short paper machine can be selected and used as appropriate according to the purpose. . The papermaking method may be any method such as acidic papermaking, neutral papermaking, or weak alkaline papermaking. However, in recent years, since paper preservation is required, base paper made by neutral papermaking is preferred. In addition, in order to improve the surface strength, the surface size solution such as starch, polyvinyl alcohol, polyacrylamide or the like is size pressed, and in order to further improve the surface smoothness of the base paper, You may use the surface size liquid which mix | blended the pigment used for the aqueous coating liquid for pigment coating layers.
このようにして得られた原紙の少なくとも片面に、顔料と接着剤を主成分とする水性塗被液を塗被、乾燥して顔料塗被層を形成させる。
本発明の顔料塗被層用水性塗被液に使用する顔料は、特に限定されるものではなく、例えば、カオリン、タルク、クレー、焼成カオリン、重質炭酸カルシウム、軽質炭酸カルシウム、二酸化チタン、サチンホワイト、亜硫酸カルシウム、石膏、硫酸バリウム、ホワイトカーボン、非晶質シリカ、ケイソウ土、炭酸マグネシウム、二酸化チタン、水酸化アルミニウム、水酸化カルシウム、水酸化マグネシウム、水酸化亜鉛、酸化亜鉛、酸化マグネシウム、ベントナイト、セリサイト等の無機顔料のほか、尿素ホルマリン樹脂微粒子、微小中空粒子等の有機顔料等、一般の塗被紙用として知られている顔料を単独あるいは併用で使用することができる。
A pigment coating layer is formed by coating and drying an aqueous coating liquid mainly composed of a pigment and an adhesive on at least one side of the base paper thus obtained.
The pigment used in the aqueous coating liquid for a pigment coating layer of the present invention is not particularly limited, and examples thereof include kaolin, talc, clay, calcined kaolin, heavy calcium carbonate, light calcium carbonate, titanium dioxide, and satin. White, calcium sulfite, gypsum, barium sulfate, white carbon, amorphous silica, diatomaceous earth, magnesium carbonate, titanium dioxide, aluminum hydroxide, calcium hydroxide, magnesium hydroxide, zinc hydroxide, zinc oxide, magnesium oxide, bentonite In addition to inorganic pigments such as sericite, pigments known for general coated paper, such as organic pigments such as fine particles of urea formalin and fine hollow particles, can be used alone or in combination.
また、前記接着剤は、特に限定されるものではなく、例えば、カゼイン、大豆蛋白、等の蛋白質類、スチレン−ブタジエン共重合体、メチルメタクリレート−ブタジエン共重合体の共役ジエン系重合体ラテックス、アクリル系重合体ラテックス、エチレン−酢酸ビニル共重合体等のビニル系重合体等のビニル系重合体ラテックス、あるいはこれらの各種重合体をカルボキシル基等の官能基含有単量体により、官能基変性したアルカリ溶解性或はアルカリ非溶解性の重合体ラテックス、ポリビニルアルコール、オレフィン−無水マレイン酸樹脂、メラミン樹脂等の合成樹脂系接着剤、陽性化デンプン、酸化デンプン、エステル化デンプン等のデンプン類、カルボキシメチルセルロース、ヒドロキシメチルセルロース等のセルロース誘導体等、一般の塗被紙用として知られる接着剤を単独あるいは併用で使用することができる。なお、接着剤の使用量は顔料１００質量部に対し５〜５０質量部、好ましくは１０〜３０質量部程度である。 The adhesive is not particularly limited, and examples thereof include proteins such as casein and soybean protein, styrene-butadiene copolymer, conjugated diene polymer latex of methyl methacrylate-butadiene copolymer, acrylic -Based polymer latex, vinyl-based polymer latex such as vinyl-based polymer such as ethylene-vinyl acetate copolymer, or alkalis obtained by functionally modifying these polymers with a functional group-containing monomer such as a carboxyl group. Soluble or alkali-insoluble polymer latex, synthetic resin adhesives such as polyvinyl alcohol, olefin-maleic anhydride resin, melamine resin, starches such as positive starch, oxidized starch, esterified starch, carboxymethyl cellulose , Cellulose derivatives such as hydroxymethylcellulose, etc. Coating adhesives known for the paper can be used alone or in combination. In addition, the usage-amount of an adhesive agent is 5-50 mass parts with respect to 100 mass parts of pigments, Preferably it is about 10-30 mass parts.
また、本発明に使用する顔料塗被層用水性塗被液には、本発明の効果を妨げない範囲において、青系統或いは紫系統の染料や有色顔料、蛍光染料、増粘剤、保水剤、酸化防止剤、老化防止剤、導電処理剤、消泡剤、紫外線吸収剤、分散剤、ｐＨ調整剤、離型剤、耐水化剤、撥水剤等の各種助剤を適宜配合することができる。 In addition, the aqueous coating liquid for pigment coating layer used in the present invention, in a range that does not interfere with the effects of the present invention, blue or purple dyes and colored pigments, fluorescent dyes, thickeners, water retention agents, Various auxiliary agents such as an antioxidant, an anti-aging agent, a conductive treatment agent, an antifoaming agent, an ultraviolet absorber, a dispersant, a pH adjuster, a mold release agent, a water-resistant agent, and a water repellent can be appropriately blended. .
前記材料をもって構成される顔料塗被層用水性塗被液は、一般に固形分濃度を２０〜７０質量％程度に調製し、前記の原紙上に乾燥重量で片面あたり５〜２５ｇ／ｍ２、より好ましくは７〜２０ｇ／ｍ２程度になるように、塗被、乾燥する。顔料塗被層の層構成については、特に限定されるものではなく、片面あたり１層以上形成させるものである。
また、本発明に使用する顔料塗被層を有した塗被紙は、表面層を形成させる前に、必要に応じてスーパーキャレンダー、ブラシ掛け等の平滑化処理しても構わない。
The aqueous coating liquid for pigment coating layer composed of the above materials is generally prepared with a solid content concentration of about 20 to 70% by mass, and 5 to 25 g / m 2 per side by dry weight on the base paper. Preferably, it is coated and dried so as to be about 7 to 20 g / m 2 . The layer configuration of the pigment coating layer is not particularly limited, and one or more layers are formed on one side.
Further, the coated paper having the pigment coating layer used in the present invention may be subjected to a smoothing process such as super calendering or brushing as necessary before the surface layer is formed.
本発明に使用する顔料塗被層用水性塗被液の塗被装置については、特に限定されるものではなく、当業界で一般的に使用されているトレーリング、フレキシブル、ロールアプリケーション、ファウンテンアプリケーション、ショートドゥエル等のベベルタイプやベントタイプのブレードコーター、エアーナイフコーター、バーコーター、ロッドブレードコーター、チャンプフレックスコーター、ゲートロールコーター、グラビアコーター、カーテンコーター、ダイコーター、スプレーコーター等の塗工装置が適宜使用できる。勿論、これらの装置はオンマシンでもよく、オフマシンであってもよい。また、湿潤塗被層を乾燥する方法としても、特に限定するものではなく、例えば、蒸気乾燥、ガスヒーター乾燥、電気ヒーター乾燥、赤外線ヒーター乾燥等の各種方式が採用できる。 About the coating apparatus of the aqueous coating liquid for pigment coating layers used for this invention, it is not specifically limited, Trailing, flexible, roll application, fountain application generally used in this industry, Applicable coating devices such as short-dwell and bevel type blade coaters, air knife coaters, bar coaters, rod blade coaters, champ flex coaters, gate roll coaters, gravure coaters, curtain coaters, die coaters and spray coaters. Can be used. Of course, these devices may be on-machine or off-machine. Moreover, it does not specifically limit as a method of drying a wet coating layer, For example, various systems, such as vapor | steam drying, gas heater drying, electric heater drying, and infrared heater drying, are employable.
次に、実施例を挙げて本発明を具体的に説明するが、勿論、本発明はこれらの実施例に限定されない。なお、特に断わらない限り例中の「部」および「％」は、それぞれ「固形分質量部」および「固形分質量％」を示す。 Next, the present invention will be specifically described with reference to examples. However, the present invention is not limited to these examples. Unless otherwise specified, “parts” and “%” in the examples represent “solid mass parts” and “solid mass%”, respectively.
各実施例および比較例で得られた印刷用塗被紙を、下記の方法で評価し、その結果を表１に示した。 The coated paper for printing obtained in each example and comparative example was evaluated by the following method, and the results are shown in Table 1.
（カレンダーロール汚れ）
カレンダー処理後、カレンダーの金属ロールの汚れを目視評価した。評価は次の５段階評価で行った。
５（優）−１（劣）であり、評価が２以下のものは、実用上問題がある。
(Calendar roll dirt)
After the calendar treatment, the dirt on the metal roll of the calendar was visually evaluated. Evaluation was performed by the following five-step evaluation.
Those having a rating of 5 (excellent) -1 (inferior) and having an evaluation of 2 or less have practical problems.
（白紙光沢度）
ＴＡＰＰＩ試験法：Ｔ ４８０ ｏｍ−９２（ＴＡＰＰＩ Ｔｅｓｔ Ｍｅｔｈｏｄ Ｔ ４８０ ｏｍ−９２）に準じて、光沢度計（型式：ＧＭ−２６Ｄ、村上色彩技術研究所社製）を使用して測定した。
(Blank gloss)
TAPPI test method: Measured using a gloss meter (model: GM-26D, manufactured by Murakami Color Research Laboratory Co., Ltd.) according to T 480 om-92 (TAPPI Test Method T 480 om-92).
（白紙表面性）
白紙表面性を目視評価した。評価は次の５段階評価で行った。
５（優）−１（劣）であり、評価が２以下のものは、実用上問題がある。
(Blank paper surface)
The surface property of the blank paper was visually evaluated. Evaluation was performed by the following five-step evaluation.
Those having a rating of 5 (excellent) -1 (inferior) and having an evaluation of 2 or less have practical problems.
（印刷光沢）
ＲＩ印刷試験機にて、印刷インキ（商品名：バリウスＧ墨Ｓタイプ、大日本インキ社製）を０．６ｃｃ使用して印刷を行い、２３℃、５０％ＲＨの雰囲気で４８時間放置してインキを乾燥させ、光沢度計（型式：ＧＭ−２６Ｄ、村上色彩技術研究所製）を用いて６０°光沢度を測定した。
(Print gloss)
Using an RI printing tester, printing was performed using 0.6 cc of printing ink (trade name: Varius G ink S type, manufactured by Dainippon Ink Co., Ltd.) and left for 48 hours in an atmosphere of 23 ° C. and 50% RH. The ink was dried, and the 60 ° gloss was measured using a gloss meter (model: GM-26D, manufactured by Murakami Color Research Laboratory).
（インキセット性）
ＲＩ印刷試験機にて、印刷インキ（商品名：バリウスＧ墨Ｓタイプ、大日本インキ社製）を０．６ｃｃ使用して印刷を行い、３分後に白紙と印刷面を重ねて、再度ＲＩ印刷試験機にてニップし、白紙に転写したインキの濃度を目視評価した。評価は次の５段階評価で行った。５（優：濃度低）−１（劣：濃度高）であり、評価が２以下のものは、実用上問題がある。
(Ink setting)
Using an RI printing tester, printing is performed using 0.6 cc of printing ink (trade name: Varius G ink S type, manufactured by Dainippon Ink, Inc.). After 3 minutes, the blank paper and the printing surface are overlapped, and RI printing is performed again. The density of the ink nipped with a tester and transferred onto a white paper was visually evaluated. Evaluation was performed by the following five-step evaluation. 5 (excellent: low concentration) -1 (poor: high concentration) and a rating of 2 or less has a practical problem.
（表面強度）
ＲＩ印刷試験機にて、印刷インキ（紙試験用インキ紅、東洋インキ社製）を０．４ｃｃ使用して印刷を行い、印刷面のピッキングの程度を目視評価した。評価は次の５段階評価で行った。
５（優）−１（劣）であり、評価が２以下のものは、実用上問題がある。
(Surface strength)
Using an RI printing tester, printing was performed using 0.4 cc of printing ink (ink for paper testing, manufactured by Toyo Ink Co., Ltd.), and the degree of picking on the printed surface was visually evaluated. Evaluation was performed by the following five-step evaluation.
Those having a rating of 5 (excellent) -1 (inferior) and having an evaluation of 2 or less have practical problems.
（吸水着肉性）
ＲＩ印刷試験機にて、水付け直後、印刷インキ（商品名：バリウスＧ墨Ｓタイプ、大日本インキ社製）を０．５ｃｃ使用して印刷を行い、印刷濃度およびインキ着肉ムラを目視評価した。評価は５段階評価で行った。
５（優）−１（劣）であり、評価が２以下のものは、実用上問題がある。
(Water absorption suitability)
Immediately after wetting with an RI printing tester, printing was performed using 0.5 cc of printing ink (trade name: Varius G ink S type, manufactured by Dainippon Ink Co., Ltd.), and the print density and ink unevenness were visually evaluated. did. Evaluation was carried out by a five-step evaluation.
Those having a rating of 5 (excellent) -1 (inferior) and having an evaluation of 2 or less have practical problems.
（インキ着肉ムラ）
ＲＩ印刷試験機にて、１色目に印刷インキ（商品名：ＴＯＹＯＫＩＮＧ ＴＫＵ ＣＣ藍、東洋インキ社製）を０．５ｃｃ使用して印刷を行い、２色目に印刷インキ（紙試験用インキ紅、東洋インキ社製）を０．３ｃｃ使用し、１色目印刷後の時間を１５秒、３０秒、６０秒、９０秒、１２０秒、１８０秒と変えて重ね刷りした時の２色目紅インキの着肉ムラを目視評価した。なお、インキ着肉ムラの最も劣るところを評価し、評価は５段階評価で行った。
５（優）−１（劣）であり、評価が２以下のものは、実用上問題がある。
(Ink unevenness)
In the RI printing tester, printing is performed using 0.5 cc of printing ink (trade name: TOYOKING TKU CC Ai, manufactured by Toyo Ink Co., Ltd.) for the first color, and printing ink (paper test ink red, Toyo) for the second color. Ink Co., Ltd.) 0.3cc, and the time after printing the first color is changed to 15 seconds, 30 seconds, 60 seconds, 90 seconds, 120 seconds and 180 seconds. The unevenness was visually evaluated. The most inferior ink unevenness was evaluated, and the evaluation was performed in a five-step evaluation.
Those having a rating of 5 (excellent) -1 (inferior) and having an evaluation of 2 or less have practical problems.
（擦れ汚れ）
まず、ＲＩ印刷試験機にて、印刷インキ（商品名：バリウスＧ墨Ｓタイプ、大日本インキ社製）を１ｃｃ使用して印刷を行い、２３℃、５０％ＲＨの雰囲気で２４時間放置してインキを乾燥させた。次に、学振式摩擦試験機にて、この印刷面と白紙面を４．９Ｎの荷重で１往復擦り合わせ、印刷面の擦れ傷、および白紙面のインキ汚れの程度を目視評価した。評価は次の５段階評価で行った。
５（優）−１（劣）であり、評価が２以下のものは、実用上問題がある。
(Rubbing dirt)
First, using an RI printing tester, printing is performed using 1 cc of printing ink (trade name: Varius G ink S type, manufactured by Dainippon Ink Co., Ltd.) and left in an atmosphere of 23 ° C. and 50% RH for 24 hours. The ink was dried. Next, the printed surface and the white paper surface were rubbed once with a load of 4.9 N using a Gakushin friction tester, and the degree of scratches on the printed surface and ink stains on the white paper surface were visually evaluated. Evaluation was performed by the following five-step evaluation.
Those having a rating of 5 (excellent) -1 (inferior) and having an evaluation of 2 or less have practical problems.
実施例１
＜原紙の調製＞
酸素−オゾン−水酸化ナトリウム−過酸化水素−二酸化塩素からなる工程で多段漂白されたＬＢＫＰ６５部（ＣＳＦ５００ｍｌ）と、酸素−オゾン−水酸化ナトリウム−過酸化水素−二酸化塩素からなる工程で多段漂白されたＮＢＫＰ３５部（ＣＳＦ５００ｍｌ）とからなるパルプスラリー１００部に、填料として軽質炭酸カルシウム（商品名：タマパールＴＰ−１２１、奥多摩工業社製）を原紙灰分が１０％となるように添加した後、パルプスラリーの全固形分に対して硫酸アルミニウム０．５部、カチオン澱粉（商品名：エースＫ−１００、王子コーンスターチ社製）０．５部、アルキルケテンダイマーサイズ剤（商品名：サイズパインＫ−２８７、荒川化学社製）０．１部、ポリアクリルアミド（商品名：ポリストロン８５１、荒川化学社製）０．０２部を順次添加し、紙料を調製した。得られた紙料をオントップツインワイヤー抄紙機で抄紙し、さらにゲートロールサイズプレス装置で酸化澱粉（商品名：エースＡ、王子コーンスターチ社製）を両面で１．５ｇ／ｍ２（固形分）塗布して実量４６ｇ／ｍ２の原紙を調製した。
Example 1
<Preparation of base paper>
LBKP 65 parts (CSF 500 ml) multi-stage bleached in the process consisting of oxygen-ozone-sodium hydroxide-hydrogen peroxide-chlorine dioxide and multi-stage bleaching in the process consisting of oxygen-ozone-sodium hydroxide-hydrogen peroxide-chlorine dioxide After adding light calcium carbonate (trade name: Tama Pearl TP-121, manufactured by Okutama Kogyo Co., Ltd.) as a filler to 100 parts of pulp slurry consisting of 35 parts of NBKP (CSF 500 ml), pulp slurry Of aluminum sulfate, 0.5 parts of cationic starch (trade name: Ace K-100, manufactured by Oji Cornstarch), alkyl ketene dimer sizing agent (trade name: Size Pine K-287, Arakawa Chemical Co., Ltd.) 0.1 parts, polyacrylamide (trade name: Polystron 851, Arakawa Chemical) Company Ltd.) were added sequentially 0.02 parts, was prepared stock. The obtained stock is made with an on-top twin-wire paper machine, and then oxidized starch (trade name: Ace A, manufactured by Oji Cornstarch) is 1.5 g / m 2 (solid content) on both sides with a gate roll size press. A base paper having an actual amount of 46 g / m 2 was prepared by coating.
＜顔料塗被層用水性塗被液Ａの調製＞
分散剤としてポリアクリル酸ナトリウム０．１部を添加した水溶液に、重質炭酸カルシウム（商品名：ハイドロカーブ９０、備北粉化工業社製）５０部、カオリン（商品名：ミラグロス、エンゲルハード社製）５０部を順次添加し、コーレス分散機で分散し、顔料スラリーを調製した。この顔料スラリー中の顔料１００部に対して、接着剤として澱粉（商品名：エースＡ、王子コーンスターチ社製）３部、スチレン−ブタジエン共重合体ラテックス（商品名：ＯＪ−１０００、ＪＳＲ社製）８部、滑剤としてステアリン酸カルシウム（商品名：ノプコートＣ−１０４ＨＳ、サンノプコ社製）０．２部添加し、さらに助剤として消泡剤および染料を順次加え、更に水を加えて固形分濃度６３％の顔料塗被層用水性塗被液Ａを得た。
<Preparation of aqueous coating liquid A for pigment coating layer>
To an aqueous solution to which 0.1 part of sodium polyacrylate was added as a dispersant, 50 parts of heavy calcium carbonate (trade name: Hydrocurve 90, manufactured by Bihoku Powder Chemical Co., Ltd.), kaolin (trade name: Milagros, manufactured by Engelhard) 50 parts in succession were added and dispersed with a Coreless disperser to prepare a pigment slurry. For 100 parts of pigment in the pigment slurry, 3 parts of starch (trade name: Ace A, manufactured by Oji Cornstarch Co., Ltd.) and styrene-butadiene copolymer latex (trade name: OJ-1000, manufactured by JSR) are used as an adhesive. 8 parts, 0.2 parts of calcium stearate (trade name: Nopcoat C-104HS, manufactured by San Nopco Co., Ltd.) is added as a lubricant, and an antifoaming agent and a dye are sequentially added as auxiliary agents, and water is further added to a solid content concentration of 63%. An aqueous coating solution A for a pigment coating layer was obtained.
＜表面層用水性塗被液の調製＞
ガラス転移温度が５０℃、平均粒子径が２６０ｎｍである熱可塑性重合体ラテックスＡ６０部、コロイダルシリカ（商品名：スノーテックス３０、平均粒子径：１０〜２０μｍ、日産化学工業社製）４０部をコーレス分散機で混合、分散した後、滑剤としてステアリン酸カルシウム（商品名：ノプコートＣ−１０４ＨＳ、サンノプコ社製）０．２部添加し、さらに助剤として消泡剤および染料を順次添加して、更に水を加えて固形分濃度３５％の表面層用水性塗被液を調製した。
<Preparation of aqueous coating liquid for surface layer>
Corresponds to 60 parts of thermoplastic polymer latex A having a glass transition temperature of 50 ° C. and an average particle diameter of 260 nm, and 40 parts of colloidal silica (trade name: Snowtex 30, average particle diameter: 10 to 20 μm, manufactured by Nissan Chemical Industries). After mixing and dispersing with a disperser, 0.2 part of calcium stearate (trade name: Nopcoat C-104HS, manufactured by San Nopco) is added as a lubricant, and an antifoaming agent and a dye are sequentially added as auxiliary agents, and water is further added. Was added to prepare an aqueous coating solution for a surface layer having a solid concentration of 35%.
＜印刷用塗被紙の作製＞
上記条件で抄造した原紙に、顔料塗被層用水性塗被液Ａを、乾燥重量が片面９ｇ／ｍ２となるようにブレードコーターで両面塗被、乾燥した後、表面層用水性塗被液を、乾燥重量が片面１．５ｇ／ｍ２となるようにブレードコーターで両面塗被、乾燥した後、スーパーカレンダー仕上げを行い、実量６７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．１９ｇ／ｃｍ３であった。
<Preparation of coated paper for printing>
The base paper made under the above conditions is coated with an aqueous coating liquid A for a pigment coating layer on a double-side with a blade coater so that the dry weight is 9 g / m 2 on one side, and then dried. Was coated on both sides with a blade coater so that the dry weight would be 1.5 g / m 2 on one side, dried, and then super calendered to obtain a coated paper for printing having an actual amount of 67 g / m 2 . The tightness of the coated paper for printing was 1.19 g / cm 3 .
実施例２
実施例１の表面層用水性塗被液の調製において、熱可塑性重合体ラテックスＡを４０部、コロイダルシリカを６０部とした以外は、実施例１と同様にして実量６７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．１９ｇ／ｃｍ３であった。
Example 2
In the preparation of the aqueous coating liquid for the surface layer of Example 1, the actual amount of 67 g / m 2 was printed in the same manner as in Example 1 except that 40 parts of the thermoplastic polymer latex A and 60 parts of colloidal silica were used. Coated paper was obtained. The tightness of the coated paper for printing was 1.19 g / cm 3 .
実施例３
実施例１の表面層用水性塗被液の調製において、コロイダルシリカ４０部の代わりにガラス転移温度７８℃のスチレン−２−メチルヘキシルアクリレート共重合体とコロイダルシリカの複合体（商品名：モビニール８０６０、ニチゴーモビニール社製、コロイダルシリカ６０部と共重合体４０部）４０部とした以外は、実施例１と同様にして実量６７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．１９ｇ／ｃｍ３であった。
Example 3
In the preparation of the aqueous coating liquid for the surface layer of Example 1, a composite of styrene-2-methylhexyl acrylate copolymer and colloidal silica having a glass transition temperature of 78 ° C. (trade name: Mobile 8060) instead of 40 parts of colloidal silica. A coated paper for printing having an actual amount of 67 g / m 2 was obtained in the same manner as in Example 1 except that 40 parts by Nichigomo Vinyl Co., Ltd., 40 parts of colloidal silica and 40 parts of copolymer) were used. The tightness of the coated paper for printing was 1.19 g / cm 3 .
実施例４
実施例１の熱可塑性重合体ラテックスＡを、ガラス転移温度が５０℃、平均粒子径が３５０ｎｍである熱可塑性重合体ラテックスＢに変更した以外は、実施例１と同様にして実量６７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．１９ｇ／ｃｍ３であった。
Example 4
The actual amount 67 g / m in the same manner as in Example 1 except that the thermoplastic polymer latex A of Example 1 was changed to a thermoplastic polymer latex B having a glass transition temperature of 50 ° C. and an average particle diameter of 350 nm. No. 2 coated paper for printing was obtained. The tightness of the coated paper for printing was 1.19 g / cm 3 .
実施例５
＜原紙の調製＞
酸素−オゾン−水酸化ナトリウム−過酸化水素−二酸化塩素からなる工程で多段漂白されたＬＢＫＰ８５部（ＣＳＦ５００ｍｌ）と、酸素−オゾン−水酸化ナトリウム−過酸化水素−二酸化塩素からなる工程で多段漂白されたＮＢＫＰ１５部（ＣＳＦ５００ｍｌ）とからなるパルプスラリー１００部に、填料として軽質炭酸カルシウム（タマパールＴＰ−１２１／奥多摩工業社製）を原紙灰分が８％となるように添加した後、パルプスラリーの全固形分に対して硫酸アルミニウム０．５部、カチオン澱粉（エースＫ−１００／王子コーンスターチ社製）０．５部、アルキルケテンダイマーサイズ剤（サイズパインＫ−２８７／荒川化学社製）０．１部、ポリアクリルアミド（ポリストロン８５１／荒川化学社製）０．０２部を順次添加し、紙料を調製した。得られた紙料をオントップツインワイヤー抄紙機で抄紙し、さらにゲートロールサイズプレス装置で酸化澱粉（エースＡ／王子コーンスターチ社製）を両面で１．５ｇ／ｍ２（固形分）塗布して実量６８．７ｇ／ｍ２の原紙を調製した。
Example 5
<Preparation of base paper>
85 parts of LBKP (CSF 500 ml) bleached in multiple steps in the process consisting of oxygen-ozone-sodium hydroxide-hydrogen peroxide-chlorine dioxide and multi-stage bleached in the process consisting of oxygen-ozone-sodium hydroxide-hydrogen peroxide-chlorine dioxide. After adding light calcium carbonate (Tamapearl TP-121 / Okutama Kogyo Co., Ltd.) as a filler to 100 parts of a pulp slurry consisting of 15 parts of NBKP (CSF 500 ml), the total solids of the pulp slurry 0.5 parts of aluminum sulfate, 0.5 part of cationic starch (Ace K-100 / manufactured by Oji Cornstarch), 0.1 part of alkyl ketene dimer sizing agent (Size Pine K-287 / manufactured by Arakawa Chemical) , 0.02 part of polyacrylamide (Polystron 851 / Arakawa Chemical Co., Ltd.) was sequentially added to the paper. It was prepared. The obtained stock is made with an on-top twin-wire paper machine, and then oxidized starch (Ace A / manufactured by Oji Cornstarch) is applied on both sides with a gate roll size press machine at 1.5 g / m 2 (solid content). An actual amount of 68.7 g / m 2 of base paper was prepared.
＜顔料塗被層用水性塗被液Ｂの調製＞
分散剤としてポリアクリル酸ナトリウム０．１部を添加した水溶液に、重質炭酸カルシウム（ハイドロカーブ６０／備北粉化工業社製）１００部を添加し、コーレス分散機で分散し、顔料スラリーを調製した。この顔料スラリー中の顔料１００部に対して、接着剤として澱粉（エースＡ／王子コーンスターチ社製）６部、スチレン−ブタジエン共重合体ラテックス（ＯＪ−１０００／ＪＳＲ社製）６部添加し、さらに助剤として消泡剤および染料を順次加え、更に水を加えて固形分濃度６２％の顔料塗被層用水性塗被液Ｂを得た。
<Preparation of aqueous coating solution B for pigment coating layer>
100 parts of heavy calcium carbonate (Hydrocurve 60 / manufactured by Bihoku Powder Chemical Co., Ltd.) is added to an aqueous solution containing 0.1 part of sodium polyacrylate as a dispersant, and dispersed with a Coreless disperser to prepare a pigment slurry. did. For 100 parts of pigment in the pigment slurry, 6 parts of starch (Ace A / Oji Cornstarch) 6 parts, 6 parts of styrene-butadiene copolymer latex (OJ-1000 / JSR) are added as an adhesive, and An antifoaming agent and a dye were sequentially added as an auxiliary agent, and water was further added to obtain an aqueous coating solution B for pigment coating layer having a solid content concentration of 62%.
＜顔料塗被層用水性塗被液Ｃの調製＞
分散剤としてポリアクリル酸ナトリウム０．１部を添加した水溶液に、重質炭酸カルシウム（ハイドロカーブ９０／備北粉化工業社製）５０部、カオリン（ハイドログロス９０／ヒューバー社製）５０部を順次添加し、コーレス分散機で分散し、顔料スラリーを調製した。この顔料スラリーの顔料１００部に対して、接着剤として澱粉（エースＡ／王子コーンスターチ社製）２部、スチレン−ブタジエン共重合体ラテックス（ＯＪ−１０００／ＪＳＲ社製）９部、滑剤としてステアリン酸カルシウム（ノプコートＣ−１０４ＨＳ／サンノプコ社製）０．２部添加し、さらに助剤として消泡剤および染料を順次加え、更に水を加えて固形分濃度６３％の顔料塗被層用水性塗被液Ｃを得た。
<Preparation of aqueous coating liquid C for pigment coating layer>
To an aqueous solution to which 0.1 part of sodium polyacrylate was added as a dispersant, 50 parts of heavy calcium carbonate (Hydrocurve 90 / Bihoku Powder Chemical Co., Ltd.) and 50 parts of kaolin (HydroGloss 90 / Huber Corporation) were sequentially added. The resulting mixture was added and dispersed with a Coreless disperser to prepare a pigment slurry. For 100 parts of pigment in this pigment slurry, 2 parts of starch (Ace A / Oji Cornstarch) as an adhesive, 9 parts of styrene-butadiene copolymer latex (OJ-1000 / JSR), calcium stearate as a lubricant (Nopcoat C-104HS / manufactured by San Nopco Co., Ltd.) 0.2 parts are added, and an antifoaming agent and a dye are sequentially added as an auxiliary agent, and water is further added to form an aqueous coating solution for a pigment coating layer having a solid concentration of 63% C was obtained.
＜表面層用水性塗被液の調製＞
熱可塑性重合体ラテックスＡ６５部、コロイダルシリカ（商品名：スノーテックス３０、日産化学工業社製）３５部をコーレス分散機で混合、分散した後、滑剤としてステアリン酸カルシウム（商品名：ノプコートＣ−１０４ＨＳ、サンノプコ社製）０．２部添加し、さらに助剤として消泡剤および染料を順次添加して、更に水を加えて固形分濃度３５％の表面層用水性塗被液を調製した。
<Preparation of aqueous coating liquid for surface layer>
After 65 parts of thermoplastic polymer latex A and 35 parts of colloidal silica (trade name: Snowtex 30, manufactured by Nissan Chemical Industries, Ltd.) were mixed and dispersed by a Coreless disperser, calcium stearate (trade name: Nopcoat C-104HS, (Sannopco Co., Ltd.) was added in an amount of 0.2 parts, an antifoaming agent and a dye were sequentially added as auxiliary agents, and water was further added to prepare an aqueous coating solution for a surface layer having a solid content concentration of 35%.
＜印刷用塗被紙の作製＞
上記条件で抄造した原紙に、顔料塗被層用水性塗被液Ｂを、乾燥重量が片面９ｇ／ｍ２となるようにブレードコーターで両面塗被、乾燥し、次いで、顔料塗被層用水性塗被液Ｃを、乾燥重量が片面９ｇ／ｍ２となるようにブレードコーターで両面塗被、乾燥した後、表面層用水性塗被液を、乾燥重量が片面１．５ｇ／ｍ２となるようにブレードコーターで両面塗被、乾燥した後、スーパーカレンダー仕上げを行い、実量１０７．７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．２６ｇ／ｃｍ３であった。
<Preparation of coated paper for printing>
The base paper made under the above conditions is coated with an aqueous coating solution B for a pigment coating layer on a double-side with a blade coater so that the dry weight is 9 g / m 2 on one side, and then dried. After coating and drying the coating liquid C with a blade coater so that the dry weight is 9 g / m 2 on one side, the aqueous coating liquid for surface layer has a dry weight of 1.5 g / m 2 on one side. After coating on both sides with a blade coater and drying, super calendering was performed to obtain a coated paper for printing having an actual amount of 107.7 g / m 2 . The tightness of the coated paper for printing was 1.26 g / cm 3 .
実施例６
実施例５の印刷用塗被紙の作製において、表面層用水性塗被液を、ゲートロールコーターで塗被した以外は、実施例５と同様にして実量１０７．７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．２５ｇ／ｃｍ３であった。
Example 6
For the production of the coated paper for printing of Example 5, the actual amount of 107.7 g / m 2 for printing was used in the same manner as in Example 5 except that the aqueous coating liquid for the surface layer was coated with a gate roll coater. Coated paper was obtained. The tightness of the coated paper for printing was 1.25 g / cm 3 .
実施例７
実施例５の印刷用塗被紙の作製において、スーパーカレンダー仕上げをしなかった以外は、実施例５と同様にして実量１０７．７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．０９ｇ／ｃｍ３であった。
Example 7
In the production of the coated paper for printing in Example 5, a coated paper for printing having an actual amount of 107.7 g / m 2 was obtained in the same manner as in Example 5 except that the super calendering was not performed. The tightness of the coated paper for printing was 1.09 g / cm 3 .
実施例８
実施例５の表面層用水性塗被液の調製において、固形分濃度を２０％とし、印刷用塗被紙の作製において、表面層の塗被量を、乾燥重量で片面０．５ｇ／ｍ２とした以外は、実施例５と同様にして実量１０５．７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．２５ｇ／ｃｍ３であった。
Example 8
In the preparation of the aqueous coating liquid for the surface layer in Example 5, the solid content concentration was 20%, and in the production of the coated paper for printing, the coating amount of the surface layer was 0.5 g / m 2 on one side by dry weight. A coated paper for printing having an actual amount of 105.7 g / m 2 was obtained in the same manner as in Example 5 except that. The tightness of the coated paper for printing was 1.25 g / cm 3 .
実施例９
実施例５の表面層用水性塗被液の調製において、固形分濃度を４５％とし、印刷用塗被紙の作製において、表面層の塗被量を、乾燥重量で片面３．５ｇ／ｍ２とした以外は、実施例５と同様にして実量１１１．７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．２７ｇ／ｃｍ３であった。
Example 9
In the preparation of the aqueous coating liquid for the surface layer in Example 5, the solid content concentration was 45%, and in the production of the coated paper for printing, the coating amount of the surface layer was 3.5 g / m 2 on one side by dry weight. Except for the above, a coated paper for printing having an actual amount of 111.7 g / m 2 was obtained in the same manner as in Example 5. The tightness of the coated paper for printing was 1.27 g / cm 3 .
実施例１０
＜水性塗被液の調製＞
分散剤としてポリアクリル酸ナトリウム０．１部を添加した水溶液に、カオリン（商品名：コンツアー１５００、イメリス社製）１００部を添加し、コーレス分散機で分散し、顔料スラリーを調製した。この顔料スラリー中の顔料１００部に対して、接着剤として澱粉（商品名：エースＡ、王子コーンスターチ社製）２０部、スチレン−ブタジエン共重合体ラテックス（商品名：ＯＪ−１０００、ＪＳＲ社製）１０部添加し、さらに助剤として消泡剤および染料を順次加え、更に水を加えて固形分濃度５０％の水性塗被液を得た。
Example 10
<Preparation of aqueous coating solution>
100 parts of kaolin (trade name: Contour 1500, manufactured by Imeris Co., Ltd.) was added to an aqueous solution to which 0.1 part of sodium polyacrylate was added as a dispersant, and the mixture was dispersed with a Coreless disperser to prepare a pigment slurry. For 100 parts of the pigment in the pigment slurry, 20 parts of starch (trade name: Ace A, manufactured by Oji Cornstarch), styrene-butadiene copolymer latex (trade name: OJ-1000, manufactured by JSR) are used as an adhesive. 10 parts were added, an antifoaming agent and a dye were sequentially added as auxiliary agents, and water was further added to obtain an aqueous coating solution having a solid content concentration of 50%.
＜原紙の調製＞
酸素−オゾン−水酸化ナトリウム−過酸化水素−二酸化塩素からなる工程で多段漂白されたＬＢＫＰ６５部（ＣＳＦ５００ｍｌ）と、酸素−オゾン−水酸化ナトリウム−過酸化水素−二酸化塩素からなる工程で多段漂白されたＮＢＫＰ３５部（ＣＳＦ５００ｍｌ）とからなるパルプスラリー１００部に、填料として軽質炭酸カルシウム（商品名：タマパールＴＰ−１２１、奥多摩工業社製）を原紙灰分が１０％となるように添加した後、パルプスラリーの全固形分に対して硫酸アルミニウム０．５部、カチオン澱粉（商品名：エースＫ−１００、王子コーンスターチ社製）０．５部、アルキルケテンダイマーサイズ剤（商品名：サイズパインＫ−２８７、荒川化学社製）０．１部、ポリアクリルアミド（商品名：ポリストロン８５１、荒川化学社製）０．０２部を順次添加し、紙料を調製した。得られた紙料をオントップツインワイヤー抄紙機で抄紙し、さらに前記水性塗被液を、乾燥重量が片面４ｇ／ｍ２となるようにゲートロールサイズプレス装置で両面塗被、乾燥し、実量５２ｇ／ｍ２の原紙を調製した。
<Preparation of base paper>
LBKP 65 parts (CSF 500 ml) multi-stage bleached in the process consisting of oxygen-ozone-sodium hydroxide-hydrogen peroxide-chlorine dioxide and multi-stage bleaching in the process consisting of oxygen-ozone-sodium hydroxide-hydrogen peroxide-chlorine dioxide After adding light calcium carbonate (trade name: Tama Pearl TP-121, manufactured by Okutama Kogyo Co., Ltd.) as a filler to 100 parts of pulp slurry consisting of 35 parts of NBKP (CSF 500 ml), pulp slurry Of aluminum sulfate, 0.5 parts of cationic starch (trade name: Ace K-100, manufactured by Oji Cornstarch), alkyl ketene dimer sizing agent (trade name: Size Pine K-287, Arakawa Chemical Co., Ltd.) 0.1 parts, polyacrylamide (trade name: Polystron 851, Arakawa Chemical) Company Ltd.) were added sequentially 0.02 parts, was prepared stock. The obtained stock is made with an on-top twin-wire paper machine, and the aqueous coating solution is further coated on both sides with a gate roll size press so that the dry weight becomes 4 g / m 2 on one side, and dried. A base paper having an amount of 52 g / m 2 was prepared.
＜顔料塗被層用水性塗被液Ｄの調製＞
分散剤としてポリアクリル酸ナトリウム０．１部を添加した水溶液に、重質炭酸カルシウム（商品名：ハイドロカーブ９０、備北粉化工業社製）４０部、カオリン（商品名：ハイドラグロス９０、ヒューバー社製）６０部を順次添加し、コーレス分散機で分散し、顔料スラリーを調製した。この顔料スラリー中の顔料１００部に対して、接着剤として澱粉（商品名：エースＡ、王子コーンスターチ社製）１部、スチレン−ブタジエン共重合体ラテックス（商品名：ＯＪ−１０００、ＪＳＲ社製）１０部、滑剤としてステアリン酸カルシウム（商品名：ノプコートＣ−１０４ＨＳ、サンノプコ社製）０．２部添加し、さらに助剤として消泡剤および染料を順次加え、更に水を加えて固形分濃度６３％の顔料塗被層用水性塗被液Ｄを得た。
<Preparation of aqueous coating solution D for pigment coating layer>
To an aqueous solution containing 0.1 part of sodium polyacrylate as a dispersant, 40 parts of heavy calcium carbonate (trade name: Hydrocurve 90, manufactured by Bihoku Powder Chemical Co., Ltd.), kaolin (trade name: Hydra Gloss 90, Huber) (Manufactured) 60 parts were sequentially added and dispersed with a Coreless disperser to prepare a pigment slurry. For 100 parts of pigment in the pigment slurry, 1 part of starch (trade name: Ace A, manufactured by Oji Cornstarch Co., Ltd.), styrene-butadiene copolymer latex (trade name: OJ-1000, manufactured by JSR) as an adhesive 10 parts, 0.2 parts of calcium stearate (trade name: Nopcoat C-104HS, manufactured by San Nopco Co., Ltd.) is added as a lubricant. Further, an antifoaming agent and a dye are sequentially added as auxiliary agents, and water is further added to obtain a solid content concentration of 63%. An aqueous coating solution D for a pigment coating layer was obtained.
＜印刷用塗被紙の作製＞
上記条件で抄造した原紙に、顔料塗被層用水性塗被液Ｄを、乾燥重量が片面９ｇ／ｍ２となるようにブレードコーターで両面塗被、乾燥した後、実施例５と同じ表面層用水性塗被液を、乾燥重量が片面１．５ｇ／ｍ２となるようにブレードコーターで両面塗被、乾燥した後、スーパーカレンダー仕上げを行い、実量７３ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．２１ｇ／ｃｍ３であった。
<Preparation of coated paper for printing>
The base paper made under the above conditions is coated with an aqueous coating solution D for a pigment coating layer on a double-side with a blade coater so that the dry weight is 9 g / m 2 on one side and dried, and then the same surface layer as in Example 5 The aqueous coating solution is coated on both sides with a blade coater so that the dry weight is 1.5 g / m 2 on one side, dried, and then super calendered to give an actual coated paper of 73 g / m 2. Got. The tightness of the coated paper for printing was 1.21 g / cm 3 .
比較例１
実施例１の印刷用塗被紙の作製において、表面層用水性塗被液の塗被、乾燥をおこなわなかった以外は、実施例１と同様にして実量６４ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．１８ｇ／ｃｍ３であった。
Comparative Example 1
In the production of the coated paper for printing in Example 1, the actual coating amount of 64 g / m 2 was applied in the same manner as in Example 1 except that the aqueous coating liquid for surface layer was not coated and dried. I got paper. The tension of this coated paper for printing was 1.18 g / cm 3 .
比較例２
実施例１の表面層用水性塗被液の調製において、熱可塑性重合体ラテックスＡを、ガラス転移温度が３０℃、平均粒子径が２６０ｎｍである熱可塑性重合体ラテックスＣに変更した以外は、実施例１と同様にして実量６７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．１９ｇ／ｃｍ３であった。
Comparative Example 2
In the preparation of the aqueous coating liquid for the surface layer in Example 1, the thermoplastic polymer latex A was changed to a thermoplastic polymer latex C having a glass transition temperature of 30 ° C. and an average particle diameter of 260 nm. In the same manner as in Example 1, a coated paper for printing having an actual amount of 67 g / m 2 was obtained. The tightness of the coated paper for printing was 1.19 g / cm 3 .
比較例３
実施例１の表面層用水性塗被液の調製において、熱可塑性重合体ラテックスＡを１００部とし、コロイダルシリカを無配合に変更した以外は、実施例１と同様にして実量６７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．１８ｇ／ｃｍ３であった。
Comparative Example 3
In the preparation of the aqueous coating liquid for the surface layer of Example 1, the actual amount was 67 g / m 2 in the same manner as in Example 1 except that the thermoplastic polymer latex A was changed to 100 parts and the colloidal silica was changed to no compounding. A coated paper for printing was obtained. The tension of this coated paper for printing was 1.18 g / cm 3 .
比較例４
実施例１の表面層用水性塗被液の調製において、熱可塑性重合体ラテックスＡを、ガラス転移温度が９０℃、平均粒子径が２６０ｎｍである熱可塑性重合体ラテックスＤに変更し、コロイダルシリカを無配合に変更した以外は、実施例１と同様にして実量６７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．１８ｇ／ｃｍ３であった。
Comparative Example 4
In the preparation of the aqueous coating liquid for the surface layer of Example 1, the thermoplastic polymer latex A was changed to a thermoplastic polymer latex D having a glass transition temperature of 90 ° C. and an average particle diameter of 260 nm, and colloidal silica was used. A coated paper for printing having an actual amount of 67 g / m 2 was obtained in the same manner as in Example 1 except that the composition was changed to no blending. The tension of this coated paper for printing was 1.18 g / cm 3 .
比較例５
実施例５の印刷用塗被紙の作製において、表面層用水性塗被液の塗被、乾燥をおこなわなかった以外は、実施例５と同様にして実量１０４．７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．２５ｇ／ｃｍ３であった。
Comparative Example 5
For production of the coated paper for printing of Example 5, the actual amount of 104.7 g / m 2 for printing was used in the same manner as in Example 5 except that the aqueous coating liquid for surface layer was not applied and dried. Coated paper was obtained. The tightness of the coated paper for printing was 1.25 g / cm 3 .
比較例６
実施例７の印刷用塗被紙の作製において、表面層用水性塗被液の塗被、乾燥をおこなわなかった以外は、実施例７と同様にして実量１０４．７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．０５ｇ／ｃｍ３であった。
Comparative Example 6
For the production of the coated paper for printing in Example 7, the actual amount of 104.7 g / m 2 for printing was used in the same manner as in Example 7 except that the aqueous coating liquid for surface layer was not applied and dried. Coated paper was obtained. The tightness of the coated paper for printing was 1.05 g / cm 3 .
比較例７
実施例５の表面層用水性塗被液の調製において、熱可塑性重合体ラテックスＡを、ガラス転移温度が９０℃、平均粒子径が２６０ｎｍである熱可塑性重合体ラテックスＤに変更した以外は、実施例５と同様にして実量１０７．７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．２６ｇ／ｃｍ３であった。
Comparative Example 7
In the preparation of the aqueous coating liquid for the surface layer in Example 5, the thermoplastic polymer latex A was changed to a thermoplastic polymer latex D having a glass transition temperature of 90 ° C. and an average particle diameter of 260 nm. In the same manner as in Example 5, a coated paper for printing having an actual amount of 107.7 g / m 2 was obtained. The tightness of the coated paper for printing was 1.26 g / cm 3 .
比較例８
実施例５の表面層用水性塗被液の調製において、熱可塑性重合体ラテックスＡを、ガラス転移温度が９０℃、平均粒子径が１００ｎｍである熱可塑性重合体ラテックスＥに変更した以外は、実施例５と同様にして実量１０７．７ｇ／ｍ２の印刷用塗被紙を得た。なお、この印刷用塗被紙の緊度は１．２６ｇ／ｃｍ３であった。
Comparative Example 8
In the preparation of the aqueous coating liquid for the surface layer in Example 5, the thermoplastic polymer latex A was changed to a thermoplastic polymer latex E having a glass transition temperature of 90 ° C. and an average particle diameter of 100 nm. In the same manner as in Example 5, a coated paper for printing having an actual amount of 107.7 g / m 2 was obtained. The tightness of the coated paper for printing was 1.26 g / cm 3 .
Claims (6)
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| Application Number | Priority Date | Filing Date | Title |
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| JP2006021603A JP2007204856A (en) | 2006-01-31 | 2006-01-31 | Coated paper for printing |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2006021603A JP2007204856A (en) | 2006-01-31 | 2006-01-31 | Coated paper for printing |
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| JP2007204856A true JP2007204856A (en) | 2007-08-16 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009263854A (en) * | 2008-03-31 | 2009-11-12 | Nippon Paper Industries Co Ltd | Coated paper for gravure printing |
| CN102508007A (en) * | 2011-11-24 | 2012-06-20 | 西南大学 | Dynamic method for measuring surface property parameters of substance |
| JP2012132133A (en) * | 2010-12-24 | 2012-07-12 | Nippon Paper Industries Co Ltd | Printing paper |
| CN102892951A (en) * | 2010-04-14 | 2013-01-23 | 斯派克特拉-科特公司 | Liner/medium/paper for laminated panel |
| JP2015134978A (en) * | 2015-02-23 | 2015-07-27 | 日本製紙株式会社 | printing paper |
| CN115450066A (en) * | 2022-10-28 | 2022-12-09 | 江苏万宝瑞达高新技术有限公司 | Ink-jet synthetic paper and manufacturing method thereof |
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2006
- 2006-01-31 JP JP2006021603A patent/JP2007204856A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009263854A (en) * | 2008-03-31 | 2009-11-12 | Nippon Paper Industries Co Ltd | Coated paper for gravure printing |
| CN102892951A (en) * | 2010-04-14 | 2013-01-23 | 斯派克特拉-科特公司 | Liner/medium/paper for laminated panel |
| JP2012132133A (en) * | 2010-12-24 | 2012-07-12 | Nippon Paper Industries Co Ltd | Printing paper |
| CN102508007A (en) * | 2011-11-24 | 2012-06-20 | 西南大学 | Dynamic method for measuring surface property parameters of substance |
| CN102508007B (en) * | 2011-11-24 | 2013-07-10 | 西南大学 | Dynamic method for measuring surface property parameters of substance |
| JP2015134978A (en) * | 2015-02-23 | 2015-07-27 | 日本製紙株式会社 | printing paper |
| CN115450066A (en) * | 2022-10-28 | 2022-12-09 | 江苏万宝瑞达高新技术有限公司 | Ink-jet synthetic paper and manufacturing method thereof |
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