JP2007254922A - Coated paper for printing use and method for producing the same - Google Patents
Coated paper for printing use and method for producing the same Download PDFInfo
- Publication number
- JP2007254922A JP2007254922A JP2006081753A JP2006081753A JP2007254922A JP 2007254922 A JP2007254922 A JP 2007254922A JP 2006081753 A JP2006081753 A JP 2006081753A JP 2006081753 A JP2006081753 A JP 2006081753A JP 2007254922 A JP2007254922 A JP 2007254922A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- filler
- printing
- weight
- coated
- 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.)
- Granted
Links
Landscapes
- Paper (AREA)
Abstract
Description
本発明は、抄造時の灰分歩留まりが高く、特にオフセット印刷機での印刷において紙粉やブリスター（層間剥離）のトラブルがなく印刷走行性に優れ、更に裏抜けが少なく印面品質に優れる印刷用塗工紙に関するものである。 The present invention has a high ash yield at the time of papermaking, and in particular, printing on an offset printing press has no trouble with paper dust and blisters (interlaminar peeling), and has excellent printing runnability, and further has excellent print surface quality with little show-through. It relates to industrial paper.
近年、印刷用紙は、高填料化、古紙パルプ高配合化に加え、抄紙機の高速化と両面脱水化などが重なり、抄造時の灰分歩留まりは低い状況にある。 In recent years, printing paper has a low ash yield at the time of paper making due to the high speed of paper machines and double-sided dewatering in addition to high fillers and high recycled paper pulp.
一方、品質面では、印刷機での使用に耐えうることが最重要品質であり、印刷用塗工紙において、ブリスターや紙粉のトラブルに関係する層間強度や表面強度に対する要求は極めて厳しい。最近は、これらの走行性に関係する品質に加えて、カラーで両面印刷を行うことが多いため、画像が反対面から透けて見える現象、いわゆる裏抜けについては年々要求レベルが高くなっている。 On the other hand, in terms of quality, the most important quality is that it can withstand use in a printing press, and in coated paper for printing, requirements for interlayer strength and surface strength related to troubles with blisters and paper dust are extremely severe. In recent years, in addition to the quality related to the running property, double-sided printing is often performed in color, and therefore, a phenomenon in which an image can be seen through from the opposite side, that is, a so-called show-through, has been increasing year by year.
印刷用塗工紙の印刷時裏抜けを少なくするためには、紙の不透明度を上げることが最も効果的であることが知られている。紙の不透明度を上げる方法としては、比散乱係数が高く不透明度の上昇効果が大きい填料を配合し、紙中灰分を上昇させることが有効である。紙中灰分の上昇は、それに加えて原紙の平滑性を向上させることによる塗工層の均一性を生みだすが、印刷用塗工紙では、原紙の紙中灰分を上昇させると、抄造時の灰分歩留まりが大きく低下し、安定操業が困難になる。また、高灰分化によって特にオフセット印刷機内でブランケットに堆積する紙粉が多くなったり、層間強度の低下により、熱による乾燥によってインキを乾燥するヒートセット型オフセット輪転機において、ブリスターのトラブルが多くなる問題点がある。 It is known that increasing the opacity of the paper is the most effective way to reduce back-through of the coated coated paper for printing. As a method for increasing the opacity of paper, it is effective to increase the ash content in the paper by blending a filler having a high specific scattering coefficient and a large effect of increasing opacity. The increase in ash content in the paper also produces the uniformity of the coating layer by improving the smoothness of the base paper, but in the case of printing coated paper, if the ash content in the base paper is increased, the ash content during papermaking The yield is greatly reduced and stable operation becomes difficult. In addition, due to high ash differentiation, more paper dust accumulates on the blanket in the offset printing press, and due to the decrease in interlayer strength, blistering troubles increase in heat-set type offset rotary presses that dry ink by heat. There is a problem.
このため、抄造時に歩留り向上剤の使用が考えられるが、従来から使用されている歩留り向上剤である極限粘度法による重量平均分子量が最高でも約1,000万程度のカチオン性或いはアニオン性ポリアクリルアミド系歩留り向上剤を添加する１液歩留り処方や、カチオン性高分子電解質添加後、前記のカチオン性或いはアニオン性ポリアクリルアミド系歩留り向上剤を添加する２液歩留り処方では、地合などの品質を良好に維持した場合には、微細成分の十分な歩留りが得られなかった。この歩留り低下のため、ワイヤーを通過した白水中に含まれる微細成分の濃度が高まり、ポリディスクフィルターや浮上分離装置などの白水処理設備の負荷が増大し、白水を処理できない事態に陥いることもあった。また、ワイヤーを通過した微細成分が紙料中に次第に蓄積する結果、抄紙機ストックインレットに供給する紙料の固形分濃度が次第に高くなり、抄造が不安定となり、最悪の場合、最終的に抄紙自体が不可能となる事態も起こることがあった。これらの抄紙中断による経済的損失は非常に大きく極めて重大な問題となる場合がある。また、抄紙系外へ排水として排出される白水中には多量の有価物である微細粒子が含まれており、この経済的損失も大きく、更に排水処理設備の負荷が増大するという問題もあった。 For this reason, it is conceivable to use a yield improver at the time of papermaking, but a cationic or anionic polyacrylamide type yield having a weight average molecular weight of about 10 million at the maximum by the intrinsic viscosity method, which is a conventional yield improver. Maintaining good quality such as 1-component retention formulation with an improver or 2-component retention formulation with the addition of a cationic or anionic polyacrylamide retention improver after the addition of a cationic polyelectrolyte In such a case, a sufficient yield of fine components could not be obtained. Due to this decrease in yield, the concentration of fine components contained in white water that has passed through the wire has increased, and the load on white water treatment equipment such as polydisc filters and flotation separators has increased, resulting in a situation where white water cannot be treated. there were. In addition, as a result of the gradual accumulation of fine components that have passed through the wire in the stock, the solids concentration of the stock supplied to the paper machine stock inlet becomes gradually higher, making the paper unstable, and in the worst case, finally the paper Occasionally, it became impossible. The economic losses due to these paper interruptions can be very significant and extremely serious. In addition, white water discharged as wastewater outside the papermaking system contains a large amount of fine particles, which are valuable resources, and there is a problem that this economic loss is large and the load on the wastewater treatment facility is further increased. .
前記１液歩留り処方や２液歩留り処方で、歩留り向上剤を高添加すれば、微細粒子の歩留りは多少改善されるが歩留り向上は頭打ちとなるため、満足できる歩留りは得られず、依然として抄造が不安定であり、かつ抄造して得られる用紙の地合が悪化するという問題があった。 If the yield improver is added at a high rate in the one-liquid yield formulation or the two-liquid yield formulation, the yield of fine particles is improved to some extent, but the yield improvement reaches a peak, so that a satisfactory yield cannot be obtained, and the papermaking still remains. There is a problem that it is unstable and the formation of paper obtained by papermaking deteriorates.
抄造時の微細成分の歩留りを改善する技術としては、例えば、炭酸カルシウムを主体とする填料を含有する製紙原料を用いて、中性〜弱アルカリ性で抄紙する場合において、新聞用紙では製紙原料に重合系カチオン性水溶性高分子および／または重縮合系カチオン性物質を添加した後、アニオン性水溶性高分子を添加して抄紙する方法が開示されている(特許文献１参照)。また、機械パルプおよび／または脱墨パルプを多量に含む中性〜アルカリ性領域の抄造における歩留りや濾水性を改善することを課題として、機械パルプおよび／または脱墨パルプを30〜100重量%含むパルプと填料とから成る、固形分濃度0.1〜1.5重量%、pH＝6〜10の紙料に対して、カチオン性高分子電解質、アニオン性高分子物質およびベントナイトを、この順序で添加する技術が開示されている(特許文献２参照)。また、機械パルプおよび／または脱墨パルプを多量に含む紙料系を中性〜アルカリ性領域で抄造する際の歩留りと濾水性の改善を課題として、機械パルプおよび／または脱墨パルプを全パルプ成分に対して30〜100重量%含むパルプと填料を主成分とし、固形分濃度が0.1〜1.5重量%で、pH＝6〜10の紙料に対して、カチオン性凝結剤、フェノール系化合物、ノニオン性凝集剤をこの順序で添加し、かつカチオン性凝結剤とフェノール系化合物の比率が25：75〜75：25の配意とする技術が開示されている(特許文献３参照)。これらの技術により、用紙抄造時の微細成分の歩留りは若干改善されるが、未だ十分な効果とは言えない。 As a technology to improve the yield of fine components at the time of papermaking, for example, when making paper with neutral to weak alkali using a papermaking raw material containing a filler mainly composed of calcium carbonate, it is polymerized into a papermaking raw material in newsprint paper A method of making paper by adding an anionic water-soluble polymer after adding a cationic water-soluble polymer and / or a polycondensation cationic substance is disclosed (see Patent Document 1). In addition, a pulp containing 30 to 100% by weight of mechanical pulp and / or deinked pulp for the purpose of improving the yield and drainage in neutral to alkaline papermaking containing a large amount of mechanical pulp and / or deinked pulp Disclosed is a technology in which a cationic polyelectrolyte, an anionic polymer substance and bentonite are added in this order to a paper material having a solid content concentration of 0.1 to 1.5% by weight and a pH of 6 to 10 comprising a filler and a filler. (See Patent Document 2). In addition, mechanical pulp and / or deinked pulp is used as a total pulp component for the purpose of improving the yield and drainage when making a paper system containing a large amount of mechanical pulp and / or deinked pulp in the neutral to alkaline region. Containing 30 to 100% by weight of pulp and filler, solid content of 0.1 to 1.5% by weight, and pH = 6 to 10 paper, cationic coagulant, phenolic compound, nonion A technique is disclosed in which the coagulant is added in this order and the ratio of the cationic coagulant to the phenolic compound ranges from 25:75 to 75:25 (see Patent Document 3). Although these techniques slightly improve the yield of fine components at the time of paper making, it is still not a sufficient effect.
本発明が解決しようとする課題は、抄造時の灰分歩留まりが高く、かつ印刷時にブリスターや紙粉発生が少なく、更に不透明度が高く裏抜けが少なく、かつ印刷品質に優れる印刷用塗工紙を提供することにある。 The problem to be solved by the present invention is to provide a coated paper for printing that has a high ash yield at the time of papermaking, a small amount of blisters and paper dust at the time of printing, a high opacity, a low back-through, and an excellent print quality. It is to provide.
本発明者らは、鋭意研究した結果、ジアリルジメチルアンモウニウムクロライドのホモポリマーまたは、ジアリルジメチルアンモウニウムクロライドと(メタ)アクリルアミドとのコポリマーを成分とするカチオン性高分子化合物により処理した填料を原紙に含有し、紙中灰分が３〜４０固形分重量%である印刷用塗工紙を得ることにより本発明に到達した。前記填料は炭酸カルシウムを含有すること好ましい。また、カチオン性高分子化合物の填料に対する添加率は、填料に対して、０.０５〜２.０固形分重量％であることが好ましい。 As a result of diligent research, the present inventors have found that a filler treated with a cationic polymer compound containing as a component a homopolymer of diallyldimethylammonium chloride or a copolymer of diallyldimethylammonium chloride and (meth) acrylamide. The present invention has been achieved by obtaining a coated paper for printing which is contained in the base paper and has an ash content in the paper of 3 to 40% by weight. The filler preferably contains calcium carbonate. Moreover, it is preferable that the addition rate with respect to the filler of a cationic high molecular compound is 0.05-2.0 solid content weight% with respect to a filler.
抄造時の填料歩留まりが高く、かつ印刷機での使用時にブリスターや紙粉発生が少なく、更に不透明度が高く両面印刷時の裏抜けが少なく、印刷品質の良好な印刷用塗工紙を得ることができる。 To obtain coated paper with good printing quality with high filler yield during paper making, low blistering and paper dust generation when used on a printing press, high opacity and low back-through during double-sided printing. Can do.
本発明の印刷用塗工紙の原紙に使用されるパルプ原料としては、特に限定されるものではなく、広葉樹クラフトパルプ（LKP）、針葉樹クラフトパルプ（NKP）、脱墨パルプ（DIP）、グランドパルプ（GP）、サーモメカニカルパルプ（TMP）、ケミサーモメカニカルパルプ（CTMP）など、紙の抄紙原料として一般的に使用されているものであればよい。 The pulp raw material used for the base paper of the coated paper for printing according to the present invention is not particularly limited, and it is hardwood kraft pulp (LKP), softwood kraft pulp (NKP), deinked pulp (DIP), ground pulp. (GP), thermomechanical pulp (TMP), chemithermomechanical pulp (CTMP), etc., as long as they are generally used as a papermaking raw material for paper.
本発明の印刷用塗工紙の原紙に使用される填料は、通常利用されるものが使用でき、例えば、炭酸カルシウム、クレー、シリカ、カオリン、タルク、炭酸マグネシウム、炭酸バリウム、硫酸バリウム、水酸化アルミニウム、酸化亜鉛、酸化チタンなどの無機填料、尿素−ホルマリン樹脂、メラミン樹脂、ポリスチレン樹脂、フェノール樹脂などの有機填料を単独または併用して使用できる。好ましい填料としては、炭酸カルシウムを含有するものである。炭酸カルシウムは重質炭酸カルシウムも軽質炭酸カルシウムも使用可能であるが、抄紙機のワイヤー摩耗性と塗工印刷用紙の品質の面から、軽質炭酸カルシウムの使用が好ましい。軽質炭酸カルシウムの中では、一次粒子が凝集して二次粒子を形成しているものが更に好ましい。一次粒子が凝集して二次粒子を形成している軽質炭酸カルシウムの中でもロゼッタ型軽質炭酸カルシウムが最も好ましい。 As the filler used for the base paper of the printing coated paper of the present invention, those usually used can be used, for example, calcium carbonate, clay, silica, kaolin, talc, magnesium carbonate, barium carbonate, barium sulfate, hydroxide Inorganic fillers such as aluminum, zinc oxide and titanium oxide, and organic fillers such as urea-formalin resin, melamine resin, polystyrene resin and phenol resin can be used alone or in combination. Preferred fillers are those containing calcium carbonate. As the calcium carbonate, either heavy calcium carbonate or light calcium carbonate can be used, but light calcium carbonate is preferably used from the viewpoint of wire wear of a paper machine and the quality of coated printing paper. Among the light calcium carbonates, it is more preferable that primary particles aggregate to form secondary particles. Among the light calcium carbonates in which primary particles are aggregated to form secondary particles, rosetta type light calcium carbonate is most preferable.
本発明においては、前記の填料は紙料への添加に先立って、ジアリルジメチルアンモニウムクロライド(以下、DADMACと記述する)のホモポリマーまたはDADMACと(メタ)アクリルアミドとのコポリマーと予め混合され処理される。以下にその詳細を説明する。 In the present invention, prior to addition to the stock, the filler is premixed with a homopolymer of diallyldimethylammonium chloride (hereinafter referred to as DADMAC) or a copolymer of DADMAC and (meth) acrylamide. . Details will be described below.
本発明で使用するDADMACのホモポリマーまたは、DADMACと(メタ)アクリルアミドとのコポリマーを成分とするカチオン性高分子化合物は、適宜選択して使用できる。
DADMACと共重合させる(メタ)アクリルアミドは、直鎖または分岐状のアルキル基を有しているものであり、具体的には、エチルヘキシル(メタ)アクリルアミド、ジエチルアミノプロピル(メタ)アクリルアミド、ジメチルアミノヒドロキシプロピル(メタ)アクリルアミド、N−イソプロピル(メタ)アクリルアミド、N−第3−ブチル−(メタ)アクリルアミド、C1〜C10N−アルキル(メタ)アクリルアミド、N−アリルアルキルアミド、N−イソプロピル(メタ)アクリルアミド、N,N−ジメチルアクリルアミド、C1〜C10N,N−ジアルキルメタクリルアミド、N,N−ジアリル(メタ)アクリルアミド、N,N−ジアリルアルキル(メタ)アクリルアミドなどが挙げられる。
The DADMAC homopolymer used in the present invention or the cationic polymer compound containing a copolymer of DADMAC and (meth) acrylamide as a component can be appropriately selected and used.
(Meth) acrylamide to be copolymerized with DADMAC has a linear or branched alkyl group, specifically, ethylhexyl (meth) acrylamide, diethylaminopropyl (meth) acrylamide, dimethylaminohydroxypropyl. (meth) acrylamide, N- isopropyl (meth) acrylamide, N- tert-butyl - (meth) acrylamides, C 1 ~C 10 N- alkyl (meth) acrylamide, N- allyl alkylamides, N- isopropyl (meth) Examples include acrylamide, N, N-dimethylacrylamide, C 1 to C 10 N, N-dialkylmethacrylamide, N, N-diallyl (meth) acrylamide, N, N-diallylalkyl (meth) acrylamide and the like.
DADMACのホモポリマーまたは、DADMACと(メタ)アクリルアミドとのコポリマーの重量平均分子量は特に限定は無い。また、カチオン電荷密度は0.1〜50meq/gが好ましく、0.5〜10meq/gが更に好ましい。コポリマー中のDADMACと(メタ)アクリルアミドのモル比は、この電荷密度にすることが好ましい。50meq/gを超えるものは製造コストが高くなり実用的ではなく、0.1me/g未満では、本発明の填料歩留り向上効果が小さくなる。 The weight average molecular weight of the homopolymer of DADMAC or the copolymer of DADMAC and (meth) acrylamide is not particularly limited. The cationic charge density is preferably 0.1 to 50 meq / g, more preferably 0.5 to 10 meq / g. The molar ratio of DADMAC to (meth) acrylamide in the copolymer is preferably set to this charge density. If it exceeds 50 meq / g, the production cost becomes high and is not practical, and if it is less than 0.1 me / g, the effect of improving the filler yield of the present invention becomes small.
填料に対するDADMACのホモポリマーまたは、DADMACと(メタ)アクリルアミドとのコポリマーの添加量は、填料100固形分重量部に対し、ポリマー固形分として0.05〜2.0重量部であり、0.10〜1.0重量部が好ましく、0.10〜0.50重量部が更に好ましい。0.05重量部未満では填料歩留り向上効果が小さく、2.0重量部を超えて添加しても填料歩留り向上効果が頭打ちとなる。 The amount of DADMAC homopolymer or DADMAC and (meth) acrylamide copolymer added to the filler is 0.05 to 2.0 parts by weight, preferably 0.10 to 1.0 parts by weight, based on 100 parts by weight of filler. 0.10 to 0.50 parts by weight are more preferable. If the amount is less than 0.05 parts by weight, the filler yield improving effect is small, and even if the amount exceeds 2.0 parts by weight, the filler yield improving effect reaches its peak.
DADMACのホモポリマーまたは、DADMACと(メタ)アクリルアミドとのコポリマーを添加する填料の水分散液の固形分濃度は良く混合できる濃度であれば良く、特に限定は無いが、通常は1〜50重量%である。混合するときの温度は、特に限定はないが１０〜６０℃が好ましい。填料と該ポリマーとの混合に用いる装置は、混合を充分に行える装置であれば良く、特に限定はないが、例えば、プロペラ羽根、タービン羽根、パドル翼などを有する一般的な撹拌機、ディスパーザーなどの高速回転遠心放射型撹拌機、ホモジナイザー、ホモミキサー、ウルトラミキサーなどの高速回転剪断型撹拌機、コロイドミル、プラネタリーミキサーなどの乳化機などが挙げられる。本発明においては、填料と該ポリマーを混合処理することによって、表面処理した填料であり、この填料は凝集しても良い。
DADMACのホモポリマーまたは、DADMACと(メタ)アクリルアミドとのコポリマーで処理した填料の平均粒子径は、レーザー回折法で１．０〜２５μｍが好ましい。また、処理した填料の平均粒子径は、未処理填料の平均粒子径の１．０〜３．０倍が好ましく、より好ましくは1.0〜2.0倍であり、1.0〜1.5倍が更に好ましい。3.0倍を超えると填料歩留り向上効果に問題はないが、填料が大きな凝集体となって紙層内に存在することになるために、不透明度や白色度の向上効果が小さくなる傾向にある。
The solid content concentration of the DADMAC homopolymer or the aqueous dispersion of the filler to which the copolymer of DADMAC and (meth) acrylamide is added is not particularly limited, but is usually 1 to 50% by weight. It is. Although the temperature at the time of mixing does not have limitation in particular, 10-60 degreeC is preferable. The apparatus used for mixing the filler and the polymer is not particularly limited as long as the apparatus can sufficiently perform mixing. For example, a general stirrer having a propeller blade, a turbine blade, a paddle blade, and a disperser High-speed rotary centrifugal type agitators such as high-speed rotary shear type agitators such as homogenizers, homomixers and ultramixers, and emulsifiers such as colloid mills and planetary mixers. In the present invention, the filler is a surface-treated filler by mixing the filler and the polymer, and the filler may be agglomerated.
The average particle size of a filler treated with a homopolymer of DADMAC or a copolymer of DADMAC and (meth) acrylamide is preferably 1.0 to 25 μm by a laser diffraction method. Moreover, the average particle diameter of the treated filler is preferably 1.0 to 3.0 times, more preferably 1.0 to 2.0 times, and still more preferably 1.0 to 1.5 times the average particle diameter of the untreated filler. If it exceeds 3.0 times, there is no problem in the filler yield improvement effect, but since the filler becomes a large aggregate and exists in the paper layer, the effect of improving opacity and whiteness tends to be small.
前記の混合を行った分散液はタンクなどの設備に一時貯えた後、紙料へ添加しても良いが、混合後、直ちに紙料へ添加するほうが好ましい。填料を添加する紙料のカチオン要求量は、０μeq／ｌ 以上にすることにより、本発明の効果が向上する。 The dispersion liquid that has been mixed may be temporarily stored in a tank or the like and then added to the stock. However, it is preferable to add it to the stock immediately after mixing. The effect of the present invention is improved by setting the cation requirement amount of the stock to which the filler is added to 0 μeq / l or more.
本発明の印刷用塗工紙の前処理填料の填料率は、紙中含有率として３〜４０固形分重量%である。好ましくは3〜30固形分重量%、更に好ましくは3〜20固形分重量%である。３固形分重量%未満では、填料の歩留まりは良好でオフセット印刷機でのブリスターや紙粉の問題はないが、不透明度が十分ではないため裏抜けが大きく、平滑度が低いため印面は優れないという問題がある。40固形分重量%を超えると、パルプ繊維分が少ないため填料の歩留まりが低下してしまい、また紙粉量も多く問題となる。また、紙中灰分としては、３〜４０固形分重量％である。本発明においては、本発明の効果を損なわない範囲で、混合処理しない填料を加えても良い。
また、本発明においては、パルプや填料以外の内添薬品としては、アルキルケテンダイマー系サイズ剤、アルケニル無水コハク酸系サイズ剤、中性ロジンサイズ剤等の中性サイズ剤、ポリアクリルアミド、カチオン化澱粉などの乾燥紙力剤、ポリアミドアミンエピクロロヒドリンなどの湿潤紙力剤を添加することができる。また、填料の歩留まりを更に高める目的で、公知の無機凝集剤（硫酸バンドなど）や有機高分子系凝集剤を添加することもでき、公知の高歩留まりシステム（例えば、ハイドロコールシステム、コンポジルシステムなど）を併用することもできる。
The filler rate of the pretreatment filler of the coated paper for printing of the present invention is 3 to 40% by weight as solid content. Preferably it is 3-30 solid weight%, More preferably, it is 3-20 solid weight%. If the solid content is less than 3% by weight, the yield of the filler is good and there is no problem of blisters or paper dust on the offset printing machine, but the opacity is not sufficient, so the back-through is large, and the smoothness is low, so the printing surface is not excellent. There is a problem. If the solid content exceeds 40% by weight, the pulp fiber content is low, so the yield of the filler is lowered, and the amount of paper powder is also problematic. Moreover, as ash content in paper, it is 3-40 solid content weight%. In the present invention, a filler that is not subjected to mixing treatment may be added as long as the effects of the present invention are not impaired.
In the present invention, as internal chemicals other than pulp and filler, neutral sizing agents such as alkyl ketene dimer sizing agents, alkenyl succinic anhydride sizing agents, neutral rosin sizing agents, polyacrylamide, cationization Dry paper strength agents such as starch and wet paper strength agents such as polyamidoamine epichlorohydrin can be added. In order to further increase the yield of the filler, a known inorganic flocculant (sulfuric acid band or the like) or an organic polymer flocculant can be added, and a known high yield system (for example, a hydrocoal system, a compositor system). Etc.) can be used together.
また、本発明においては、内添薬品として紙用嵩高剤を含有することもできる。通常嵩高剤を含有することにより、紙力や（剛度）が低下してしまう傾向にあるが、本発明の前処理填料と嵩高剤を併用することにより、紙力と（剛度）付与の効果を有し、嵩高でありながら、ブリスターや紙粉発生を抑えることができる。これらの紙用嵩高剤を特許文献で例示すると、次の通りである。特許第３１２８２４８号公報記載の紙用嵩高剤、特許第３４５３５０５号公報記載の紙用嵩高剤、特許第３４８２３３６号公報記載の紙用嵩高剤、特許第３５３７６９２号公報記載の紙用嵩高剤、特許第３４８２３３７号公報記載の紙用嵩高剤、特許第２９７１４４７号公報記載の紙用嵩高剤、特許第３２８３２４８号公報記載の抄紙用紙質向上剤、特許第３３８７０３３号公報記載の乾燥効率向上剤、特許第３３８７０３６号公報記載の平滑性及び透気性向上剤、特許第３５１７２００号公報記載の抄紙用添加剤、特開２００１-２４８１００号公報記載の抄紙用紙質向上剤、特開２００３-３３６１９６号公報記載の紙質向上剤、特開２０００-２７３７９２号公報記載の紙用不透明化剤、特開２００２-１２９４９７号公報記載の古紙再生用添加剤、特開２００２-２７５７８６号公報記載の古紙再生用添加剤、特開２００２-２９４５８６号公報記載の古紙再生用添加剤、特開２００２-２９４５９４号公報記載の嵩高剤、特開２００３-９６６９２号公報記載の紙用嵩高剤、特開２００３-９６６９３号記載の嵩高剤、特開２００３-９６６９４号公報記載の古紙再生用添加剤、特開２００３-９６６９５号公報記載の古紙再生用添加剤、特開２００３-１７１８９７号公報記載の紙厚向上剤、特開２００３-２４７１９７号公報記載の紙用嵩高剤、特開２００３-２５３５８８号公報記載の紙用嵩高剤、特開２００３-２５３５８９号公報記載の紙用嵩高剤、特開２００３-２５３５９０号公報の紙用嵩高剤、特開２００３-３２８２９７号公報記載の紙用低密度化剤、特開２００３-３１３７９９号公報記載の紙用低密度化剤、特開２００４-１１０５８号公報記載の抄紙用添加剤、特開２００４-２７４０１号公報記載の紙用低密度化剤、特開２００４-１１５９３５号公報記載の紙用低密度化剤、特開２００４-７６２４４号公報記載の紙用嵩高剤、特開２００４-１７６２１３号公報記載の紙用改質剤、特許第３５２１４２２号公報記載の紙用柔軟化剤、特開２００２-２７５７９２号公報記載の嵩高柔軟化剤、特開２００２-２７５７９２号公報記載の製紙用嵩高サイズ剤、特開２００３-２８６６９２号公報記載の紙用嵩高剤、特開２００４-２７００７４号公報記載の製紙用嵩高剤組成物、特開２００４-２８５４９０号公報記載の製紙用嵩高剤。特開２００４−３３９６２９号公報記載の紙用嵩高剤、２００５−５４３３０号公報記載の嵩高剤、特開２００５−６８５９２号公報記載の嵩高剤。この紙用嵩高剤を具体的に化合物で例示すると、油脂系非イオン界面活性剤、糖アルコール系非イオン活性剤、糖系非イオン界面活性剤、多価アルコール型非イオン界面活性剤、多価アルコールと脂肪酸のエステル化合物、高級アルコールあるいは高級脂肪酸のポリオキシアルキレン付加物、高級脂肪酸エステルのポリオキシアルキレン付加物、多価アルコールと脂肪酸のエステル化合物のポリオキシアルキレン付加物、脂肪酸ポリアミドアミン、直鎖状脂肪酸モノアミド、不飽和脂肪酸モノアミド、不飽和脂肪酸ジアミドアミンなどが挙げられる。好ましい嵩高剤としては、多価アルコールと脂肪酸のエステル化合物、脂肪酸ポリアミドアミン、脂肪酸ジアミドアミン、脂肪酸モノアミド、ポリアルキレンポリアミン・脂肪酸・エピクロロヒドリン縮合物である。 In the present invention, a bulking agent for paper can also be contained as an internal additive. Usually, by containing a bulking agent, the paper strength and (rigidity) tend to decrease, but by using the pretreatment filler of the present invention and the bulking agent in combination, the effect of imparting paper strength and (rigidity) is obtained. It is possible to suppress the generation of blisters and paper dust while being bulky. These bulking agents for paper are exemplified in the patent literature as follows. The paper bulking agent described in Japanese Patent No. 3128248, the paper bulking agent described in Japanese Patent No. 3453505, the paper bulking agent described in Japanese Patent No. 3482336, the paper bulking agent described in Japanese Patent No. 3537692, the patent No. 3 No. 3482337, a paper bulking agent described in Japanese Patent No. 2971447, a papermaking paper quality improving agent described in Japanese Patent No. 3283248, a drying efficiency improving agent described in Japanese Patent No. 3387033, and a patent No. 3387036. Smoothness and gas permeability improver described in Japanese Patent No. 3517200, additive for papermaking described in Japanese Patent No. 3517200, paper quality improver described in Japanese Patent Laid-Open No. 2001-248100, and improvement in paper quality described in Japanese Patent Laid-Open No. 2003-336196. Agent, paper opacifier described in JP-A No. 2000-273792, and used paper recycling described in JP-A No. 2002-129497 Additives, used paper recycling additives described in JP-A No. 2002-275786, used paper recycling additives described in JP-A No. 2002-294586, bulking agents described in JP-A No. 2002-294594, JP-A No. 2003-96692 Paper bulking agent described in Japanese Patent Publication No. 2003-96693, paper recycling additive described in Japanese Patent Laid-Open No. 2003-96694, waste paper recycling additive described in Japanese Patent Laid-Open No. 2003-96695, Paper thickness improver described in JP-A-2003-171897, paper bulking agent described in JP-A-2003-247197, paper bulking agent described in JP-A-2003-253588, and JP-A-2003-253589 Paper bulking agent, paper bulking agent disclosed in JP-A-2003-253590, paper density reducing agent described in JP-A-2003-328297, JP-A-2003-3137 No. 9 paper densifying agent, paper making additive described in JP-A No. 2004-11058, paper density reducing agent described in JP-A No. 2004-27401, JP-A No. 2004-115935 described Paper densifying agent, paper bulking agent described in JP-A-2004-76244, paper modifier described in JP-A-2004-176213, paper softening agent described in JP-A-3522142, A bulk softening agent described in JP-A No. 2002-275792, a bulky sizing agent described in JP-A No. 2002-275792, a paper bulking agent described in JP-A No. 2003-286692, and JP-A No. 2004-270074. The paper bulking agent composition described in the above, and the paper bulking agent described in JP-A No. 2004-285490. A bulking agent for paper described in JP-A-2004-339629, a bulking agent described in JP-A-2005-54330, and a bulking agent described in JP-A-2005-68592. Specific examples of the bulking agent for paper include oil-based nonionic surfactants, sugar alcohol-based nonionic surfactants, sugar-based nonionic surfactants, polyhydric alcohol-type nonionic surfactants, polyvalent alcohols Ester compound of alcohol and fatty acid, polyoxyalkylene adduct of higher alcohol or higher fatty acid, polyoxyalkylene adduct of higher fatty acid ester, polyoxyalkylene adduct of polyhydric alcohol and fatty acid ester compound, fatty acid polyamidoamine, straight chain And fatty acid monoamides, unsaturated fatty acid monoamides, unsaturated fatty acid diamide amines, and the like. Preferred bulking agents are polyhydric alcohol and fatty acid ester compounds, fatty acid polyamidoamines, fatty acid diamidoamines, fatty acid monoamides, polyalkylene polyamine / fatty acid / epichlorohydrin condensates.
嵩高剤は通常、原料パルプに対して0.2〜20固形分重量%の範囲で添加されている。0.2
固形分重量%未満では低密度化の効果が小さく、20固形分重量%を超えて添加しても、嵩高効果が頭打ちとなるため、意味がなく、コスト的にも実用できないからである。
The bulking agent is usually added in the range of 0.2 to 20% by solid weight with respect to the raw material pulp. 0.2
If the solid content is less than% by weight, the effect of reducing the density is small, and even if it is added in excess of 20% by weight, the bulky effect reaches its peak, so it is meaningless and cannot be practically used in terms of cost.
嵩高剤の添加場所は、原料ミキサー以降、本発明の無機粒子、カチオン性化合物、および澱粉糊液から成る混合スラリーや、他の填料を添加する以前が好ましい。 The bulking agent is preferably added after the raw material mixer and before the addition of the mixed slurry composed of the inorganic particles of the present invention, the cationic compound, and the starch paste, and other fillers.
本発明の印刷用塗工紙を抄造するために用いられる抄紙機は、紙の2面性を抑制する意味で、両面脱水機構を有している、オントップフォーマー、ギャップフォーマなどが望ましいが、これに限定されるものではない。プレス、キャレンダーなどは通常の操業範囲内の条件で処理を行えば良い。また、本発明においては、抄紙した原紙に、表面処理剤を塗工しても良い。
表面処理剤としては、表面強度の強化を目的とした表面紙力剤を塗工することができる。塗工する薬剤は、生澱粉や、酸化澱粉、エステル化澱粉、カチオン化澱粉、熱変性澱粉、酵素変性澱粉、アルデヒド化澱粉、ヒドロキシエチル化澱粉などの変性澱粉、カルボキシメチルセルロース、ヒドロキシエチルセルロース、メチルセルロースなどのセルロース誘導体、ポリビニルアルコール、カルボキシル変性ポリビニルアルコールなどの変性アルコール、スチレンブタジエン共重合体、ポリ酢酸ビニル、塩化ビニル−酢酸ビニル共重合体、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリアクリル酸エステル、ポリアクリルアミドなどを単独または併用する。その中でも表面強度向上効果にすぐれるヒドロキシエチル化澱粉の塗工が最も好ましい。
The paper machine used for making the coated paper for printing of the present invention is preferably an on-top former, a gap former, etc. having a double-side dewatering mechanism in order to suppress the two-sided nature of the paper. However, the present invention is not limited to this. The press, calendar, etc. may be processed under conditions within the normal operating range. In the present invention, a surface treatment agent may be applied to the base paper that has been made.
As the surface treatment agent, a surface paper strength agent for the purpose of enhancing the surface strength can be applied. Drugs to be applied include raw starch, oxidized starch, esterified starch, cationized starch, heat-modified starch, enzyme-modified starch, aldehyde-modified starch, hydroxyethylated starch and other modified starches, carboxymethylcellulose, hydroxyethylcellulose, methylcellulose, etc. Cellulose derivatives, modified alcohols such as polyvinyl alcohol and carboxyl-modified polyvinyl alcohol, styrene butadiene copolymer, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, polyacrylate, polyacrylamide Etc. alone or in combination. Of these, the application of hydroxyethylated starch, which is excellent in surface strength improvement effect, is most preferable.
また、前記の薬剤以外にも表面処理剤として、スチレンアクリル酸、スチレンマレイン酸、オレフィン系化合物など一般的な表面サイズ剤を併用塗工することができるが、サイズ剤のイオン性がカチオン性であることで非常に良好な表面強度を得られることを見出した。その理由は、本発明での予備凝集填料はカチオン性であるので、カチオン性の表面サイズ剤の方がより表面にサイズ剤が留まって塗工され、紙のサイズ性が向上する。サイズ性が向上すれば、原紙への塗工液の浸透がより抑制される。 In addition to the above-mentioned chemicals, general surface sizing agents such as styrene acrylic acid, styrene maleic acid, and olefinic compounds can be applied in combination, but the ionicity of the sizing agent is cationic. It has been found that a very good surface strength can be obtained. The reason is that since the pre-aggregated filler in the present invention is cationic, the cationic surface sizing agent is applied with the sizing agent remaining on the surface, and the paper size is improved. If the size is improved, the penetration of the coating solution into the base paper is further suppressed.
表面紙力剤と表面サイズ剤から成る表面処理剤を原紙に塗工する場合、表面紙力剤と表面サイズ剤との混合比率は公知の範囲で行えば良く、特に限定はない。塗工原紙に表面塗工剤を塗工する装置はブレードコーター、ゲートロールコーター、サイズプレスコーターなど公用のものであれば良く、特に限定はない。 When the surface treatment agent comprising the surface paper strength agent and the surface sizing agent is applied to the base paper, the mixing ratio of the surface paper strength agent and the surface sizing agent may be within a known range and is not particularly limited. The apparatus for applying the surface coating agent to the coating base paper is not particularly limited as long as it is a publicly available device such as a blade coater, a gate roll coater, or a size press coater.
本発明は、上記の方法で得られた原紙に、主に顔料と接着剤からなる塗工層を設ける。塗工層に用いる顔料としては、従来から紙の塗工顔料として用いられるものを使用することができる。これらの顔料の種類としては、クレー、カオリン、重質炭酸カルシウム、軽質炭酸カルシウム、タルク、二酸化チタン、硫酸バリウム、、硫酸カルシウム、酸化亜鉛、珪酸、珪酸塩、コロイダルシリカ、サチンホワイト等の無機顔料や、プラスチックピグメント等の有機顔料が挙げられる。これらの顔料は、必要に応じて単独または２種類以上併用して使用できる。 In the present invention, a coating layer mainly composed of a pigment and an adhesive is provided on the base paper obtained by the above method. As the pigment used in the coating layer, those conventionally used as coating pigments for paper can be used. The types of these pigments include inorganic pigments such as clay, kaolin, heavy calcium carbonate, light calcium carbonate, talc, titanium dioxide, barium sulfate, calcium sulfate, zinc oxide, silicic acid, silicate, colloidal silica, and satin white. And organic pigments such as plastic pigments. These pigments can be used alone or in combination of two or more as required.
本発明において用いる接着剤は、塗工紙用に従来から用いられている、スチレン・ブタジエン系、スチレン・アクリル系、エチレン・酢酸ビニル系、ブタジエン・メチルメタクリレート系、酢酸ビニル・ブチルアクリレート系等の各種共重合体、あるいはポリビニルアルコール、無水マレイン酸共重合体、アクリル酸・メチルメタクリレート系共重合体等の合成接着剤、カゼイン、大豆タンパク、合成タンパクなどのタンパク質類、酸化澱粉、カチオン化澱粉、尿素リン酸エステル化澱粉、ヒドロキシエチルエーテル化澱粉などの澱粉類、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、ヒドロキシエチルセルロース等のセルロース誘導体などのから、１種以上を適宜選択して使用することができる。これらの接着剤は、顔料１００重量部に対して、５〜３５重量部の範囲で使用される事が好ましい。３５重量部を超える場合は、塗料の粘度が高くなり、配管やスクリーンを通過しづらくなるといった操業性の問題が生じる等のデメリットが生じ好ましくない。また、５重量部未満の場合は、十分な表面強度がえられず好ましくない。 The adhesive used in the present invention is conventionally used for coated paper, such as styrene / butadiene, styrene / acrylic, ethylene / vinyl acetate, butadiene / methyl methacrylate, vinyl acetate / butyl acrylate, and the like. Synthetic adhesives such as various copolymers, polyvinyl alcohol, maleic anhydride copolymer, acrylic acid / methyl methacrylate copolymer, casein, soy protein, synthetic protein and other proteins, oxidized starch, cationized starch, One or more kinds of starches such as urea phosphate esterified starch and hydroxyethyl etherified starch, cellulose derivatives such as carboxymethyl cellulose, hydroxymethyl cellulose, and hydroxyethyl cellulose can be appropriately selected and used. These adhesives are preferably used in the range of 5 to 35 parts by weight with respect to 100 parts by weight of the pigment. When the amount exceeds 35 parts by weight, the viscosity of the coating becomes high, and disadvantages such as the problem of operability such as difficulty in passing through piping and a screen occur, which is not preferable. On the other hand, when the amount is less than 5 parts by weight, a sufficient surface strength cannot be obtained, which is not preferable.
本発明の塗工液には、助剤として分散剤、増粘剤、保水剤、消泡剤、耐水化剤、染料、蛍光染料等の通常使用される各種助剤を使用することができる。 In the coating liquid of the present invention, various commonly used auxiliaries such as dispersants, thickeners, water retention agents, antifoaming agents, water resistance agents, dyes and fluorescent dyes can be used as auxiliaries.
本発明において、調整された塗工液を原紙に塗工する方法については、特に限定される物ではなく、公知の塗工装置を用いる事ができる。例えばブレードコーター、バーコーター、ロールコーター、エアナイフコーター、リバースロールコーター、カーテンコーターサイズプレスコーター、ゲートロールコーター等が挙げられる。これらを用いて、一層もしくは二層以上を原紙上に片面あるいは両面塗工する。片面辺りの塗工量は３ｇ／ｍ２〜２５ｇ／ｍ２であることが好ましく、より好ましくは５ｇ／ｍ２〜２０ｇ／ｍ２であり、更に好ましくは５〜１５ｇ／ｍ２である。片面辺りの塗工量が３ｇ／ｍ２より少ない場合、十分な原紙被覆性が得られず、インキ着肉性に劣る傾向にあり、また、２５ｇ／ｍ２を超えると、ブリスターなどが出やすくなる傾向にある。 In the present invention, the method for applying the adjusted coating liquid to the base paper is not particularly limited, and a known coating apparatus can be used. Examples thereof include a blade coater, a bar coater, a roll coater, an air knife coater, a reverse roll coater, a curtain coater size press coater, and a gate roll coater. Using these, one or more layers are coated on one or both sides of the base paper. Preferably the coating weight of the single-sided Atari is 3g / m 2 ~25g / m 2 , more preferably 5g / m 2 ~20g / m 2 , more preferably from 5 to 15 g / m 2. When the coating amount on one side is less than 3 g / m 2 , sufficient base paper coverage is not obtained, and the ink inking property tends to be inferior, and when it exceeds 25 g / m 2 , blisters are easily produced. Tend to be.
湿潤塗工層を乾燥させる手法としては、例えば、蒸気加熱ヒーター、ガスヒーター、赤外線ヒーター、電気ヒータ、熱風加熱ヒーター、マイクロウェーブ、シリンダードライヤー等の通常の方法が用いられる。 As a method for drying the wet coating layer, for example, usual methods such as a steam heater, a gas heater, an infrared heater, an electric heater, a hot air heater, a microwave, and a cylinder dryer are used.
乾燥後、必要に応じて、後加工であるスーパーカレンダー、高温ソフトカレンダー等の仕上げ工程によって平滑性を付与することが可能であり、所望の品質の塗工紙が得られれば、いずれのカレンダー処理、あるいは未カレンダー処理でもよい。得られる印刷用塗工紙の密度は、０．４〜１．３g/m2の範囲であれば良い。 After drying, if necessary, smoothness can be imparted by finishing processes such as super calendering and high-temperature soft calendering, which are post-processing, and any calendering treatment can be performed as long as coated paper of the desired quality is obtained. Alternatively, uncalendar processing may be used. The density of coated printing paper obtained may be in the range of 0.4~1.3g / m 2.
以下、本発明を実施例及び比較例をあげてより具体的に説明するが、当然のことながら、本発明はこれらに限定されるものではない。なお、実施例、比較例中の％は特に断りのない限り重量％を示す。
［品質の評価方法］
(1)密度 JIS P 8118:1998に従った。
(2)耐ブリスター性 オフセット輪転機（東芝社B2T-600）で880mm幅の巻取りを600rpmの速度で両面カラー印刷を行い、4色重ね印字部(インキ濃度：墨１．８０、藍１．５０、紅１．４５、黄１．０５、４色合計濃度５．８０、X-Rite408で測定)でブリスター(フクレ)が発生した紙面温度を指標とした。
(3)紙粉 オフセット輪転機で２万部印刷後に、100ｃｍ2当たりのブランケット非画線部堆積紙粉量を測定した。
(4)裏抜け オフセット輪転機で2万部印刷時の4色ベタ面を裏面から目視して評価した。
［填料の前処理方法］
(1)前処理填料１：填料としてロゼッタ型軽質炭酸カルシウム(東洋電化株式会社製、商品名：TNC−7BY、平均粒子径3.0μｍ)を用い、この軽質炭酸カルシウムを固形分換算で15%のスラリー液60重量部に、ポリジアリルジメチルアンモウニウムクロライド(Ondeo Nalco株式会社製、商品名：N5200、カチオン電荷密度：3.9meq/g)の0.06固形分重量%液75重量部(填料固形分重量に対し0.5％に相当)を添加し、ミキサーで攪拌した。この時の平均粒子径は、3.8μｍであり、ほとんど凝集を起こしていなかった。なお、填料の平均粒子径の測定は、レーザー回折散乱法(Sysmex株式会社製マスターサイザー2000)によって測定した。
(2)前処理填料２：填料としてロゼッタ型軽質炭酸カルシウム(奥多摩工業株式会社製、商品名：TP-221BM、平均粒子径3.5μｍ)を用い、この15%スラリー液60重量部に、ポリジアリルジメチルアンモウニウムクロライド(Ondeo Nalco株式会社製、商品名：N5200、カチオン電荷密度：3.9meq/g)の0.06固形分重量%液75重量部(填料固形分重量に対し0.5％に相当)を添加し、ミキサーで攪拌した。この時の平均粒子径は、21μｍであり、凝集を起こしていた。
(3)前処理填料３：填料としてTNC−7BYを用い、この15%スラリー液60重量部に、ポリジアリルジメチルアンモウニウムクロライドN5200の0.06固形分重量%液９重量部(填料固形分重量に対し0.06％に相当)を添加し、ミキサーで攪拌した。この時の平均粒子径は、3.9μｍであり、ほとんど凝集を起こしていなかったといえる。
(4)前処理填料４：填料としてTP-221BMを用い、この15%スラリー液60重量部に、ポリジアリルジメチルアンモウニウムクロライドN5200の0.06固形分重量%液９重量部(填料固形分重量に対し0.06％に相当)を添加し、ミキサーで攪拌した。この時の平均粒子径は、4.2μｍであり、ほとんど凝集を起こしていなかったといえる。
［実施例１］
ＬＫＰ／ＮＫＰ＝７５／２５、カチオン要求量９μｅｑ／ｌの原料パルプスラリーに表面処理した前処理填料１をヘッドボックスで添加した紙料を、オントップ型抄紙機にて抄速1000m/分で抄造し、紙中灰分が１５％で坪量50.0g/m2の塗工原紙を得た。塗工液は以下のように調製した。
（塗工液１）
微粒重質炭酸カルシウム（ファイマテック社製ＦＭＴ−９０）１００部からなる顔料スラリーに、ヒドロキシエチルエーテル化澱粉（ペンフォード社製 ＰＧ２９５）を２５部添加後、さらに水を加えて固形分５０％の塗工液１を得た。
（塗工液２）
微粒カオリン（J.M.Huber社製Japangloss）４０部、微粒重質炭酸カルシウム（ファイマテック社製ＦＭＴ−９０）６０部からなる顔料１００部に、分散剤としてポリアクリル酸ソーダを添加して（対無機顔料 ０．２部）セリエミキサーで分散し、固形分濃度７０％の顔料スラリーを調整した。この様にして得られた顔料スラリーに、スチレン・ブタジエン共重合体ラテックス（ガラス転移点温度２０℃、ゲル含量８５％）１０部、ヒドロキシエチルエーテル化澱粉（ペンフォード社製 ＰＧ２９５）６部を加えた後、さらに水を加えて固形分濃度６０％の塗工液２を得た。
塗工原紙に、オンマシンのゲートロールコーターで塗工液１を両面で６g/m2塗工し乾燥した後、オフマシンのブレードコーターで塗工液２を片面で８g/m2両面に塗工・乾燥し印刷用塗工紙を得た。
１施例れい
料ょうがいぶんが３。オフセット印刷機による印刷試験で、紙粉量の測定、裏抜けの評価を行った。
EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated more concretely, naturally this invention is not limited to these. In the examples and comparative examples, “%” represents “% by weight” unless otherwise specified.
[Quality evaluation method]
(1) Density According to JIS P 8118: 1998.
(2) Blister resistance Double-sided color printing is performed on an offset rotary press (Toshiba B2T-600) with a 880 mm width winding at a speed of 600 rpm, and a four-color overprinting section (ink density: black 1.80, indigo 1. 50, red 1.45, yellow 1.05, four-color total density 5.80, measured with X-Rite 408), and the paper surface temperature at which blistering occurred was used as an index.
(3) Paper dust After printing 20,000 copies on an offset rotary press, the amount of blanket non-image area deposited paper dust per 100 cm 2 was measured.
(4) Back-through Evaluation was performed by visually observing the four-color solid surface from the back side when printing 20,000 copies on an offset rotary press.
[Pretreatment method of filler]
(1) Pretreatment filler 1: Rosetta-type light calcium carbonate (trade name: TNC-7BY, average particle diameter: 3.0 μm, manufactured by Toyo Denka Co., Ltd.) is used as a filler, and the light calcium carbonate is 15% in terms of solid content. 60 parts by weight of slurry liquid, 75 parts by weight of 0.06 solids weight% liquid of polydiallyldimethylammonium chloride (manufactured by Ondeo Nalco, trade name: N5200, cation charge density: 3.9 meq / g) (filler solids weight) (Corresponding to 0.5%), and the mixture was stirred with a mixer. The average particle size at this time was 3.8 μm, and almost no aggregation occurred. The average particle size of the filler was measured by a laser diffraction scattering method (Mastersizer 2000 manufactured by Sysmex Corporation).
(2) Pretreatment filler 2: Rosetta-type light calcium carbonate (made by Okutama Kogyo Co., Ltd., trade name: TP-221BM, average particle size 3.5 μm) is used as the filler, and polydiallyl is added to 60 parts by weight of this 15% slurry. Added 75 parts by weight of 0.06% solids by weight of dimethylammonium chloride (made by Ondeo Nalco, trade name: N5200, cationic charge density: 3.9 meq / g) (corresponding to 0.5% of filler solids weight) And stirred with a mixer. The average particle size at this time was 21 μm, and aggregation occurred.
(3) Pretreatment filler 3: TNC-7BY was used as a filler, and 60 parts by weight of this 15% slurry liquid was added to 9 parts by weight of a polydiallyldimethylammonium chloride N5200 0.06 solids weight% liquid (filler solids weight (Corresponding to 0.06%) was added and stirred with a mixer. The average particle size at this time was 3.9 μm, and it can be said that almost no aggregation occurred.
(4) Pretreatment filler 4: TP-221BM was used as a filler, and 60 parts by weight of this 15% slurry liquid was added to 9 parts by weight of a polydiallyldimethylammonium chloride N5200 0.06 solids weight% liquid (the filler solids weight (Corresponding to 0.06%) was added and stirred with a mixer. The average particle size at this time was 4.2 μm, and it can be said that almost no aggregation occurred.
[Example 1]
Paper stock prepared by adding pretreatment filler 1 surface-treated to raw pulp slurry with LKP / NKP = 75/25 and cation requirement of 9 μeq / l in the headbox at an on-top paper machine at a speed of 1000 m / min. Thus, a coated base paper having a ash content of 15% and a basis weight of 50.0 g / m 2 was obtained. The coating solution was prepared as follows.
(Coating fluid 1)
After adding 25 parts of hydroxyethyl etherified starch (PG295 manufactured by Penford) to a pigment slurry consisting of 100 parts of fine heavy calcium carbonate (Fimatech FMT-90), water was added to add 50% solids. A coating liquid 1 was obtained.
(Coating fluid 2)
To 100 parts of pigment consisting of 40 parts of fine kaolin (Japangloss, manufactured by JMHuber) and 60 parts of fine heavy calcium carbonate (FMT-90, manufactured by Phimatech), sodium polyacrylate was added as a dispersant (for inorganic pigments 0 .2 parts) Dispersed with a serie mixer to prepare a pigment slurry having a solid content of 70%. 10 parts of styrene / butadiene copolymer latex (glass transition temperature 20 ° C., gel content 85%) and 6 parts of hydroxyethyl etherified starch (PG295, manufactured by Penford) are added to the pigment slurry thus obtained. After that, water was further added to obtain a coating liquid 2 having a solid concentration of 60%.
The coating base paper, coating the coating liquid 1 by a gate roll coater on-machine after 6 g / m 2 coated and dried on both sides, the coating liquid 2 on one side with a blade coater off machine 8 g / m 2 both sides Worked and dried to obtain a coated paper for printing.
1 example fee is 3 In a printing test using an offset printing machine, the amount of paper dust was measured and the evaluation of back-through was performed.
抄造中の紙料歩留りと灰分歩留りを以下の方法で測定した。 Paper yield and ash yield during papermaking were measured by the following methods.
ストックインレット原料とワイヤー下に抜け落ちた白水(ワイヤー下白水と記述する)について、それぞれ固形分濃度と灰分濃度を測定した。下記式(1)により紙料歩留りを、下記式(2)により灰分歩留りを測定した。 Solid stock concentration and ash concentration were measured for the stock inlet raw material and white water that had fallen under the wire (described as white water under the wire). Paper yield was measured by the following formula (1), and ash yield was measured by the following formula (2).
紙料歩留り＝100×(A−Ｂ)／A …計算式(1)
A：ストックインレット原料の固形分濃度(g/l)
B：ワイヤー下白水の固形分濃度(g/l)
灰分歩留り＝100×(C−D)／C …計算式(2)
C：ストックインレット原料の灰分濃度(g/l)
D：ワイヤー下白水の灰分濃度(g/l)
灰分の測定：ストックインレット原料とワイヤー下白水について、その固形分を525℃で灰化した。
填料歩留まり、ブリスター発生温度、紙粉、裏抜けの評価結果を表１に示す。
［実施例２］
前処理填料１を前処理填料２に変更した以外は実施例１と同様にして印刷用塗工紙を得た。填料歩留まり、ブリスター発生温度、紙粉、裏抜けの評価結果を表１に示す。
［実施例３］
前処理填料１を前処理填料３に変更した以外は実施例１と同様にして印刷用塗工紙を得た。
Paper yield = 100 x (A-B) / A ... Formula (1)
A: Solid content concentration of stock inlet raw material (g / l)
B: Solid content concentration under white wire (g / l)
Ash content yield = 100 x (C-D) / C ... Formula (2)
C: Ash content of stock inlet raw material (g / l)
D: Ash concentration of white water under wire (g / l)
Ash content measurement: The solid content of the stock inlet raw material and the white water under the wire was ashed at 525 ° C.
Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Example 2]
A coated paper for printing was obtained in the same manner as in Example 1 except that the pretreatment filler 1 was changed to the pretreatment filler 2. Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Example 3]
A coated paper for printing was obtained in the same manner as in Example 1 except that the pretreatment filler 1 was changed to the pretreatment filler 3.
填料歩留まり、ブリスター発生温度、紙粉、裏抜けの評価結果を表１に示す。
［実施例４］
前処理填料１を前処理填料４に変更した以外は実施例１と同様にして印刷用塗工紙を得た。
Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Example 4]
A coated paper for printing was obtained in the same manner as in Example 1 except that the pretreatment filler 1 was changed to the pretreatment filler 4.
填料歩留まり、ブリスター発生温度、紙粉、裏抜けの評価結果を表１に示す。
［比較例１］
実施例１において、原料パルプのスラリーに、前記の前処理填料１用の軽質炭酸カルシウムとポリジアリルジメチルアンモウニウムクロライドをヘッドボックスで別々に添加した紙料を抄紙し、紙中灰分が15%の塗工原紙を得た以外は実施例１と同様に印刷用塗工紙を得た。なお、軽質炭酸カルシウムとジアリルジメチルアンモウニウムクロライドの比率は予備凝集填料１の比率と同じとした。填料歩留まり、ブリスター発生温度、紙粉、裏抜けの評価結果を表１に示す。
［比較例２］
実施例１において、原料パルプのスラリーに、前記の前処理填料２用の軽質炭酸カルシウムとポリジアリルジメチルアンモウニウムクロライドとをヘッドボックスで別々に添加した紙料を抄紙し、紙中灰分が15%の塗工原紙を得た以外は実施例２と同様に印刷用塗工紙を得た。填料歩留まり、ブリスター発生温度、紙粉、裏抜けの評価結果を表１に示す。
［比較例３］
紙中灰分が２％である以外は実施例１と同様にして印刷用塗工紙を得た。
填料歩留まり、ブリスター発生温度、紙粉、裏抜けの評価結果を表１に示す。
［比較例４］
紙中灰分が45％である以外は実施例１と同様にして印刷用塗工紙を得た。
填料歩留まり、ブリスター発生温度、紙粉、裏抜けの評価結果を表１に示す。
［比較例５］
前処理填料１をTNC-7BYに変更した以外は実施例１と同様にして印刷用塗工紙を得た。
Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Comparative Example 1]
In Example 1, a paper stock was prepared by adding light calcium carbonate for the pretreatment filler 1 and polydiallyldimethylammonium chloride separately in a head box to the raw pulp slurry, and the ash content in the paper was 15%. A coated paper for printing was obtained in the same manner as in Example 1, except that the coated base paper was obtained. The ratio of light calcium carbonate to diallyldimethylammonium chloride was the same as that of the pre-agglomerated filler 1. Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Comparative Example 2]
In Example 1, a paper stock in which the light calcium carbonate for the pretreatment filler 2 and polydiallyldimethylammonium chloride were separately added in a head box was made into a slurry of the raw pulp, and the ash content in the paper was 15 A coated paper for printing was obtained in the same manner as in Example 2 except that% coated base paper was obtained. Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Comparative Example 3]
A coated paper for printing was obtained in the same manner as in Example 1 except that the ash content in the paper was 2%.
Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Comparative Example 4]
A coated paper for printing was obtained in the same manner as in Example 1 except that the ash content in the paper was 45%.
Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Comparative Example 5]
A coated paper for printing was obtained in the same manner as in Example 1 except that the pretreatment filler 1 was changed to TNC-7BY.
填料歩留まり、ブリスター発生温度、紙粉、裏抜けの評価結果を表１に示す。
［比較例６］
前処理填料２をTP-221BMに変更した以外は実施例２と同様にして印刷用塗工紙を得た。
Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
[Comparative Example 6]
A coated paper for printing was obtained in the same manner as in Example 2 except that the pretreatment filler 2 was changed to TP-221BM.
填料歩留まり、ブリスター発生温度、紙粉、裏抜けの評価結果を表１に示す。 Table 1 shows the evaluation results of filler yield, blister generation temperature, paper dust, and back-through.
実施例１、２では、填料歩留まり、耐ブリスター性、紙粉、裏抜けがいずれも良好であることがわかる。実施例1、2と比較例１、２の比較から、前処理した填料を添加したものより、填料と処理剤とを別添加する方法は、填料歩留まりが低くなり、印刷後の耐ブリスター性に劣り、紙粉が多く劣ることがわかる。紙中灰分の少ない比較例３は、裏抜け等に劣り、紙中灰分が多い比較例４は、耐ブリスター性に劣り、紙粉量も多い。填料を前処理していない比較例５、６は、填料歩留まりが低く、耐ブリスター性に劣り、紙粉量も多く劣ることがわかる。
In Examples 1 and 2, it can be seen that the filler yield, blister resistance, paper dust, and back-through are all good. From the comparison between Examples 1 and 2 and Comparative Examples 1 and 2, the method in which the filler and the treating agent are added separately from the one in which the pretreated filler is added has a lower filler yield, and blister resistance after printing. It turns out that it is inferior and paper powder is inferior. Comparative Example 3 with a small amount of ash in the paper is inferior in see-through and the like, and Comparative Example 4 with a large amount of ash in the paper is inferior in blister resistance and has a large amount of paper dust. It can be seen that Comparative Examples 5 and 6 in which the filler was not pretreated have a low filler yield, poor blister resistance, and a large amount of paper dust.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006081753A JP4865374B2 (en) | 2006-03-23 | 2006-03-23 | Coated paper for printing and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006081753A JP4865374B2 (en) | 2006-03-23 | 2006-03-23 | Coated paper for printing and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2007254922A true JP2007254922A (en) | 2007-10-04 |
| JP4865374B2 JP4865374B2 (en) | 2012-02-01 |
Family
ID=38629438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006081753A Expired - Fee Related JP4865374B2 (en) | 2006-03-23 | 2006-03-23 | Coated paper for printing and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4865374B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009114588A (en) * | 2007-11-07 | 2009-05-28 | Nippon Paper Industries Co Ltd | Coated base paper and method for producing coated paper |
| JP2010090500A (en) * | 2008-10-07 | 2010-04-22 | Daio Paper Corp | Coated paper for printing and method for producing the same |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5748340A (en) * | 1980-06-30 | 1982-03-19 | Calgon Corp | Filter aid and pigment dispersant |
| JPH1060794A (en) * | 1996-08-14 | 1998-03-03 | Oji Paper Co Ltd | Production of paper in which filler is internally added |
| JP2000504790A (en) * | 1996-02-13 | 2000-04-18 | アライド・コロイズ・リミテツド | Manufacture of filled paper and compositions for use therein |
| JP2000504794A (en) * | 1996-02-13 | 2000-04-18 | アライド・コロイズ・リミテツド | Manufacture of filled paper and compositions for use therein |
| JP2004100119A (en) * | 2002-09-13 | 2004-04-02 | Nippon Paper Industries Co Ltd | Method for producing filler-containing paper by using coagulated filler particle |
| JP2005226214A (en) * | 2004-01-13 | 2005-08-25 | Oji Paper Co Ltd | Coated paper for offset rotary printing |
| JP2005299005A (en) * | 2004-04-09 | 2005-10-27 | Daio Paper Corp | Coating liquid for paper and coated paper using the same |
| JP2006037258A (en) * | 2004-07-23 | 2006-02-09 | Daio Paper Corp | Coated paper |
| JP2007239130A (en) * | 2006-03-07 | 2007-09-20 | Nippon Paper Industries Co Ltd | Clear-coated printing paper |
-
2006
- 2006-03-23 JP JP2006081753A patent/JP4865374B2/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5748340A (en) * | 1980-06-30 | 1982-03-19 | Calgon Corp | Filter aid and pigment dispersant |
| JP2000504790A (en) * | 1996-02-13 | 2000-04-18 | アライド・コロイズ・リミテツド | Manufacture of filled paper and compositions for use therein |
| JP2000504794A (en) * | 1996-02-13 | 2000-04-18 | アライド・コロイズ・リミテツド | Manufacture of filled paper and compositions for use therein |
| JPH1060794A (en) * | 1996-08-14 | 1998-03-03 | Oji Paper Co Ltd | Production of paper in which filler is internally added |
| JP2004100119A (en) * | 2002-09-13 | 2004-04-02 | Nippon Paper Industries Co Ltd | Method for producing filler-containing paper by using coagulated filler particle |
| JP2005226214A (en) * | 2004-01-13 | 2005-08-25 | Oji Paper Co Ltd | Coated paper for offset rotary printing |
| JP2005299005A (en) * | 2004-04-09 | 2005-10-27 | Daio Paper Corp | Coating liquid for paper and coated paper using the same |
| JP2006037258A (en) * | 2004-07-23 | 2006-02-09 | Daio Paper Corp | Coated paper |
| JP2007239130A (en) * | 2006-03-07 | 2007-09-20 | Nippon Paper Industries Co Ltd | Clear-coated printing paper |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009114588A (en) * | 2007-11-07 | 2009-05-28 | Nippon Paper Industries Co Ltd | Coated base paper and method for producing coated paper |
| JP2010090500A (en) * | 2008-10-07 | 2010-04-22 | Daio Paper Corp | Coated paper for printing and method for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4865374B2 (en) | 2012-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5210298B2 (en) | Coated base paper and method for producing coated paper | |
| CA2640356C (en) | Paper containing preaggregated filler and process for producing the same | |
| JP4179167B2 (en) | Neutral newsprint for offset printing | |
| JP2013060692A (en) | Precipitated calcium carbonate for filler and paper containing the same | |
| JP2008088621A (en) | Newsprint paper for offset printing | |
| JP4865374B2 (en) | Coated paper for printing and method for producing the same | |
| JP2006052518A (en) | Coated paper for gravure printing | |
| JP5237655B2 (en) | Bulky paper and method for producing bulky paper | |
| JP4268583B2 (en) | Method for producing neutral newspaper printing paper | |
| JP2007138305A (en) | Coated paper for printing | |
| JP2007271708A (en) | Transfer paper for electrophotography | |
| JP4948796B2 (en) | Coated paper for printing | |
| JP4854341B2 (en) | Coated paper for printing | |
| JP4791773B2 (en) | Clear coated printing paper | |
| JP4796409B2 (en) | Neutral newsprint for offset printing | |
| JP4324073B2 (en) | Filler pretreatment method, paper blended with the same, and paper production method | |
| JP2007092203A (en) | Neutral newsprint paper for offset printing | |
| JP2007239130A (en) | Clear-coated printing paper | |
| JP2009228170A (en) | Coated base paper for printing, and method for producing the coated base paper | |
| JP2007113155A (en) | Clear coated paper for printing | |
| WO2020171198A1 (en) | Coated printing paper | |
| JP4867397B2 (en) | Coated paper for web offset printing | |
| JP4581873B2 (en) | Coated paper for gravure printing | |
| JP2012255230A (en) | Printing paper | |
| JP2009242960A (en) | Printing paper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RD01 | Notification of change of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7421 Effective date: 20080314 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20090113 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20101224 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20110201 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20110324 Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20110324 |
|
| RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20110324 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20110628 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20110815 Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20110815 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20111101 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20111110 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20141118 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 4865374 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| LAPS | Cancellation because of no payment of annual fees |