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TW201920809A - Coated paper for use in printing - Google Patents

Coated paper for use in printing Download PDF

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Publication number
TW201920809A
TW201920809A TW107120648A TW107120648A TW201920809A TW 201920809 A TW201920809 A TW 201920809A TW 107120648 A TW107120648 A TW 107120648A TW 107120648 A TW107120648 A TW 107120648A TW 201920809 A TW201920809 A TW 201920809A
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Taiwan
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printing
weight
paper
pigment
coated paper
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TW107120648A
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Chinese (zh)
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TWI781183B (en
Inventor
柿木詩織
外岡遼
吉松丈博
畠山清
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日商日本製紙股份有限公司
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    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00Coated paper; Coating material
    • D21H19/36Coatings with pigments
    • D21H19/38Coatings with pigments characterised by the pigments
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00Coated paper; Coating material
    • D21H19/80Paper comprising more than one coating
    • D21H19/82Paper comprising more than one coating superposed

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Abstract

Provided is a coated paper for use in printing, comprising two or more pigment coated layers on at least one surface of a base paper, the outermost pigment coated layer containing calcium carbonate having a mean particle size (D50) of 0.80 [mu]m or less. This coated paper for use in printing has both print glossiness and exceptional ink drying, and also has exceptional print quality.

Description

印刷用塗覆紙Coated paper for printing

本發明係關於一種兼具油墨乾燥性與印刷光澤度的印刷用塗覆紙。The present invention relates to a coated paper for printing which has both ink drying property and printing glossiness.

塗覆紙係大致被分成光澤塗覆紙與消光(matte)塗覆紙。光澤塗覆紙係以往高級印刷中所使用的美術紙、高級美術紙、或者型錄、小冊子(pamphlet)等中所使用的塗布紙(coated paper)等,故該等係印刷完成質感成為白紙光澤度和印刷光澤度皆為高的光澤感。Coated paper is roughly divided into glossy coated paper and matte coated paper. Gloss coated paper is the art paper used in advanced printing, high-quality art paper, or coated paper used in catalogs, pamphlets, etc., so the texture of these printing finishes becomes white paper gloss. Both gloss and print gloss are high gloss.

所謂的消光塗覆紙係指白紙光澤度或印刷光澤度低於光澤塗覆紙的塗覆紙,消光塗覆紙具有:無光澤感塗覆紙、仿消光感(matte-tone)塗覆紙。特別是仿消光感塗覆紙,與光澤塗覆紙相較下,因為白紙光澤度與印刷光澤度的差異較大,而容易閱讀印刷後的文字部分,故近年需求日益增加。作為製造仿消光感塗覆紙之方法,可舉出藉由使用粒徑較大的顏料來作為塗覆用顏料、或於顏料塗覆後不進行壓光機處理,從而加大紙表面的凹凸等的方法。相較於光澤塗覆紙,仿消光感印刷用塗覆紙的表面的凹凸為大,而在紙的表面上附著的油墨將容易滲透。為了提高印刷濃度而有需要大量地轉移油墨,故仿消光感印刷用塗覆紙具有油墨的轉移量變多且油墨乾燥性降低之傾向。若油墨乾燥性不佳時,於堆疊印刷後的印刷品時,將會產生油墨轉移至其他地方的黏髒(offset)或印刷面的摩擦污損,又作業無法前進至下個步驟而使作業效率降低等的問題。因此,特別是對於仿消光感印刷用塗覆紙要求著高的油墨乾燥性。The so-called matte coated paper refers to coated paper whose gloss or whiteness is lower than that of glossy coated paper. Matte coated paper has: matte coated paper, matte-tone coated paper . In particular, the imitation matte coated paper is compared with the glossy coated paper because the difference between the gloss of the white paper and the printing gloss is large, and it is easy to read the printed text, so the demand has increased in recent years. As a method for manufacturing the matte-coated paper, it is possible to increase the unevenness of the surface of the paper by using a pigment having a larger particle diameter as a coating pigment or not applying a calender treatment after the pigment is applied. And other methods. Compared with glossy coated paper, the surface roughness of the coated paper for matte printing is large, and the ink adhered on the surface of the paper will easily penetrate. In order to increase the printing density, a large amount of ink needs to be transferred. Therefore, the coated paper for matte printing has a tendency to increase the amount of ink transferred and reduce the ink dryness. If the ink dryness is not good, the offset of the ink transferred to other places or the frictional contamination of the printing surface will be generated when the printed prints are stacked, and the operation cannot proceed to the next step to make the operation efficiency. Reduce issues such as. Therefore, high ink drying properties are particularly required for coated paper for matte printing.

另一方面,若油墨乾燥性較高時,由於已經被印刷的油墨面不會進行平坦化(leveling)而在印刷面上產生凹凸,故大多有印刷光澤度變低之情形。作為提高印刷光澤度之手法,有利用壓光機處理來追求平滑性的方法。但,由於白紙光澤度也隨著印刷光澤度一起變高,故不適合於仿消光感印刷用塗覆紙。為了兼具高的油墨乾燥性與高的印刷光澤,專利文獻1中揭示著在顏料塗覆層中使用特定量的特定的接著劑。 [先前技術文獻] [專利文獻]On the other hand, if the ink drying property is high, the printed ink surface will not be leveled and unevenness will be generated on the printed surface. Therefore, the printing glossiness may be lowered in many cases. As a method for improving the gloss of printing, there is a method of purifying smoothness by using a calender process. However, since the gloss of white paper also increases with the gloss of printing, it is not suitable for coated paper for imitation matte printing. In order to have both high ink dryness and high printing gloss, Patent Document 1 discloses that a specific amount of a specific adhesive is used in a pigment coating layer. [Prior Art Literature] [Patent Literature]

[專利文獻1]日本特開2007-51388號公報[Patent Document 1] Japanese Patent Laid-Open No. 2007-51388

[發明所欲解決之課題][Problems to be Solved by the Invention]

本發明的課題在於提供一種兼具印刷光澤度與優異的油墨乾燥性、且印刷品質為優異的印刷用塗覆紙,特別是仿消光感印刷用塗覆紙。 [解決課題之手段]An object of the present invention is to provide a coated paper for printing, particularly a coated paper for imitation matte printing, which has both printing gloss and excellent ink drying properties and excellent printing quality. [Means for solving problems]

本發明人有鑑於上述課題,經重複用心研究之結果發現:具備有包含特定的微粒碳酸鈣的顏料塗覆層的印刷用塗覆紙係可解決上述課題。即,前述課題係可依以下之本發明來解決。   (樣態1) 一種印刷用塗覆紙,其係在原紙的至少單面上具備有2層以上的顏料塗覆層,最外的顏料塗層包含具有0.80μm以下的平均粒徑(D50)的碳酸鈣。   (樣態2) 如樣態1所記載之印刷用塗覆紙,其中,在前述最外的顏料塗覆層的顏料100重量份中,包含前述碳酸鈣40重量份以上。   (樣態3) 如樣態1或2所記載之印刷用塗覆紙,其中,前述碳酸鈣的平均粒徑(D50)為0.50~0.75μm。   (樣態4) 如樣態1所記載之印刷用塗覆紙,其中,白紙光澤度為40%以下,藍紅印刷部分的印刷光澤度為58~75%。   (樣態5) 如樣態2所記載之印刷用塗覆紙,其中,在前述最外的顏料塗覆層的顏料100重量份中,包含前述碳酸鈣75重量份以上。   (樣態6) 如樣態1~5中任一樣態所記載之印刷用塗覆紙,其中,最外的顏料塗覆層的塗覆量係多於最內的顏料塗覆層的塗覆量。   (樣態7) 如樣態1~6中任一樣態所記載之印刷用塗覆紙,其中,白紙光澤度為40%以下。 [發明的效果]In view of the above problems, the present inventors have conducted intensive studies and found that a coated paper system for printing provided with a pigment coating layer containing a specific particulate calcium carbonate can solve the above problems. That is, the aforementioned problems can be solved by the following invention. (Aspect 1) A coated paper for printing is provided with at least one pigment coating layer on at least one side of a base paper, and the outermost pigment coating layer has an average particle diameter (D50) of 0.80 μm or less Of calcium carbonate. (Pattern 2) The coated paper for printing as described in aspect 1, which contains 40 weight part or more of said calcium carbonate in 100 weight part of pigments of the said outermost pigment coating layer. (Pattern 3) The coated paper for printing according to aspect 1 or 2, wherein the average particle diameter (D50) of the calcium carbonate is 0.50 to 0.75 μm. (Form 4) The coated paper for printing as described in Form 1, wherein the gloss of the white paper is 40% or less, and the gloss of the printing of the blue-red printed part is 58 to 75%. (Pattern 5) The coated paper for printing as described in the aspect 2, which contains 75 weight part or more of said calcium carbonate in 100 weight part of pigments of the said outermost pigment coating layer. (Pattern 6) The coated paper for printing as described in any one of patterns 1 to 5, wherein the coating amount of the outermost pigment coating layer is more than that of the innermost pigment coating layer. the amount. (Pattern 7) The coated paper for printing as described in any of the patterns 1 to 6, wherein the gloss of the white paper is 40% or less. [Effect of the invention]

依據本發明,可提供一種兼具優異的印刷光澤度與優異的油墨乾燥性、且印刷品質為優異的印刷用塗覆紙,特別是仿消光感印刷用塗覆紙。According to the present invention, it is possible to provide a coated paper for printing, particularly a coated paper for matte printing, which has both excellent printing gloss and excellent ink drying properties and excellent printing quality.

[實施發明之最佳形態][Best Mode for Implementing Invention]

以下,詳細地說明本發明。本發明中「~」係包含其端點。即,「X~Y」係包含X及Y的值。又,「X或Y」係意味著X、Y中任一、或者兩者。Hereinafter, the present invention will be described in detail. In the present invention, "~" includes its endpoints. That is, "X to Y" includes X and Y values. "X or Y" means either X or Y, or both.

1.印刷用塗覆紙   所謂的印刷用塗覆紙係指具備有被設置在原紙上的顏料塗覆層的印刷用紙。所謂的顏料塗覆層係指將白色顏料作為主成分的層。本發明的印刷用塗覆紙係顏料塗覆層為2層以上、且最外的顏料塗覆層含有具有0.80μm以下的平均粒徑(D50)的碳酸鈣。本發明的印刷用塗覆紙係可對用紙表面施予平版印刷、凹版印刷、按需印刷(on-demand printing)(雷射方式、噴墨方式、電子照片方式)等的商業印刷,作為用途,可舉出書籍、雜誌、海報、信封、月曆等,但並非被限於該等中。1. Coated paper for printing Coated paper for printing refers to printing paper provided with a pigment coating layer provided on a base paper. The pigment coating layer refers to a layer containing a white pigment as a main component. The coated paper-based pigment coating layer of the present invention has two or more layers, and the outermost pigment coating layer contains calcium carbonate having an average particle diameter (D50) of 0.80 μm or less. The coated coated paper of the present invention can be used for commercial printing such as lithography, gravure printing, on-demand printing (laser method, inkjet method, electrophotographic method) and the like on the surface of the paper. , Including books, magazines, posters, envelopes, calendars, etc., but not limited to these.

(1)顏料塗覆層 1)顏料   顏料塗覆層包含平均粒徑(D50)為0.80μm以下的碳酸鈣(以下,亦稱為「第1碳酸鈣」)。D50係體積50%平均粒徑。經沈降法之顏料的粒度分布及D50係能夠藉由Malvern公司製MASTERSIZER 3000等來進行測定。碳酸鈣的D50的上限係以0.75μm以下為較佳,以0.70μm以下為較佳。下限係以0.50μm以上為較佳。(1) Pigment coating layer 1) Pigment The rhenium pigment coating layer contains calcium carbonate (hereinafter, also referred to as "first calcium carbonate") having an average particle diameter (D50) of 0.80 μm or less. D50 is 50% volume average particle size. The particle size distribution and D50 of the pigment by the sedimentation method can be measured using a MASTERSIZER 3000 manufactured by Malvern. The upper limit of D50 of calcium carbonate is preferably 0.75 μm or less, and more preferably 0.70 μm or less. The lower limit is preferably 0.50 μm or more.

若顏料塗覆層存在於原紙的雙面之情形時,只要是至少一個面的最外的顏料塗覆層為包含第1碳酸鈣即可。When the pigment coating layer is present on both sides of the base paper, the outermost pigment coating layer on at least one side only needs to contain the first calcium carbonate.

最外的顏料塗覆層中的第1碳酸鈣的調配量的下限,在該顏料塗覆層中的顏料100重量份中,以40重量份以上為較佳,以45重量份以上為又較佳。然而,若最外的顏料塗覆層的第1碳酸鈣的調配量過多時,因為白紙光澤度會過度地上昇而損及仿消光感,故其上限係在該顏料塗覆層中的顏料100重量份中,以70重量份以下為較佳,以60重量份以下為又較佳,以55重量份以下為更佳。最外的塗覆層以外的顏料塗覆層雖也可不含有第1碳酸鈣,但若含有之情形時,該量係以在前述範圍內為較佳。第1碳酸鈣係以重質碳酸鈣或在紙漿製造步驟的苛性化步驟中所製造的輕質碳酸鈣(苛性化輕質碳酸鈣,參考日本專利5274077號公報)為較佳。The lower limit of the blending amount of the first calcium carbonate in the outermost pigment coating layer is preferably 40 parts by weight or more, and 45 parts by weight or more in 100 parts by weight of the pigment in the pigment coating layer. good. However, if the amount of the first calcium carbonate in the outermost pigmented coating layer is too large, the gloss of the white paper will be excessively increased to impair the matte feeling. Therefore, the upper limit is the pigment 100 in the pigmented coating layer. Among the parts by weight, 70 parts by weight or less is preferable, 60 parts by weight or less is more preferable, and 55 parts by weight or less is more preferable. The pigment coating layer other than the outermost coating layer may not contain the first calcium carbonate, but if it contains, the amount is preferably within the aforementioned range. The first calcium carbonate is preferably heavy calcium carbonate or light calcium carbonate (caustic light calcium carbonate, refer to Japanese Patent No. 5274077) produced in a causticizing step of a pulp manufacturing step.

作為顏料塗覆層中的第1碳酸鈣以外的白色顏料,可使用該領域中通常所使用的顏料。作為其例子,可舉出高嶺土、黏土、工程高領土(engineered kaolin)、層狀黏土、重質碳酸鈣、輕質碳酸鈣、滑石、二氧化鈦、硫酸鋇、硫酸鈣、氧化鋅、矽酸、矽酸鹽、膠體氧化矽、緞光白(satin white)等的無機顏料、及密實型、中空型、或核殼型等的有機顏料。該等之顏料係可組合多種來使用。As the white pigment other than the first calcium carbonate in the pigment coating layer, a pigment generally used in this field can be used. Examples include kaolin, clay, engineered kaolin, layered clay, heavy calcium carbonate, light calcium carbonate, talc, titanium dioxide, barium sulfate, calcium sulfate, zinc oxide, silicic acid, silicon Inorganic pigments such as acid salts, colloidal silica, satin white, and organic pigments such as compact, hollow, or core-shell types. These pigments can be used in combination of plural kinds.

作為第1碳酸鈣以外的白色顏料,以使用D50為超過0.80μm的重質碳酸鈣或輕質碳酸鈣(以下,亦稱為「第2碳酸鈣」)為較佳。碳酸鈣係因為與接著劑(黏合劑)的結著性為優異且提升白色度,故油墨乾燥性為提升,進而可達成高的白色度及印刷適性。在最外的顏料塗覆層中的顏料100重量份中,第1及第2碳酸鈣的合計量係以90重量份以上為較佳,以100重量份為又較佳。在除此以外的顏料塗覆層中的第1及第2的碳酸鈣的合計量並無限定,但以在前述範圍內為較佳。第2碳酸鈣係以重質碳酸鈣或苛性化輕質碳酸鈣為較佳。As the white pigment other than the first calcium carbonate, it is preferable to use heavy calcium carbonate or light calcium carbonate (hereinafter, also referred to as “second calcium carbonate”) having a D50 of more than 0.80 μm. Since calcium carbonate is excellent in adhesion with an adhesive (adhesive) and improves whiteness, ink drying is improved, and further, high whiteness and printability can be achieved. Of the 100 parts by weight of the pigment in the outermost pigment coating layer, the total amount of the first and second calcium carbonate is preferably 90 parts by weight or more, and more preferably 100 parts by weight. The total amount of the first and second calcium carbonates in the other pigment coating layers is not limited, but it is preferably within the aforementioned range. The second calcium carbonate is preferably heavy calcium carbonate or caustic light calcium carbonate.

2)接著劑   顏料塗覆層係包含接著劑(黏合劑)來作為基質。接著劑並無限定可使用周知的接著劑。作為其例子,可舉出苯乙烯・丁二烯系共聚物、苯乙烯・丙烯酸系共聚物、乙烯・乙酸乙烯酯系共聚物、丁二烯・甲基丙烯酸甲酯系共聚物、乙酸乙酯・丙烯酸丁酯系共聚物、馬來酸酐共聚物、丙烯酸・甲基丙烯酸甲酯系共聚物等的乳膠;完全皂化聚乙烯醇、部分皂化聚乙烯醇、羧基改性聚乙烯醇、乙醯乙醯基改性聚乙烯醇等的聚乙烯醇類;酪蛋白、大豆蛋白、合成蛋白等的蛋白質類;氧化澱粉、陽性澱粉、脲燐酸酯化澱粉、羥乙基醚化澱粉等的醚化澱粉、糊精等的澱粉類;羧甲基纖維素、羥乙基纖維素、羥甲基纖維素等的纖維素衍生物等。可組合該等之多種來使用。2) Adhesive The rhenium pigment coating layer contains an adhesive (binder) as a substrate. The adhesive is not limited, and a known adhesive can be used. Examples include styrene-butadiene-based copolymers, styrene-acrylic-acrylic copolymers, ethylene-vinyl acetate copolymers, butadiene-methyl methacrylate copolymers, and ethyl acetate.的 Latexes such as butyl acrylate-based copolymers, maleic anhydride copolymers, and methacrylate methacrylate-based copolymers; fully saponified polyvinyl alcohol, partially saponified polyvinyl alcohol, carboxyl-modified polyvinyl alcohol, ethyl acetate Polyvinyl alcohols such as fluorenyl-modified polyvinyl alcohol; proteins such as casein, soy protein, and synthetic protein; etherification of oxidized starch, positive starch, urethanized starch, and hydroxyethyl etherified starch Starches such as starch and dextrin; cellulose derivatives such as carboxymethyl cellulose, hydroxyethyl cellulose, and hydroxymethyl cellulose. A combination of these may be used.

接著劑的量,就印刷適性、塗覆適性之點而言,相對於全顏料塗覆層中的顏料100重量份,以5~30重量份為較佳,以8~25重量份為又較佳。若接著劑的總量超過25重量份時,顏料塗覆液的黏度會變高而於塗覆時容易產生操作問題。進而,可發現油墨的乾燥性為降低之傾向。另一方面,若接著劑的總量未滿5重量份時,將變得難以得到充分的表面強度。The amount of the adhesive is 5 to 30 parts by weight relative to 100 parts by weight of the pigment in the full pigment coating layer in terms of printability and coating suitability, and 8 to 25 parts by weight is more preferable. good. When the total amount of the adhesive exceeds 25 parts by weight, the viscosity of the pigment coating liquid becomes high, and handling problems are liable to occur during coating. Furthermore, it was found that the drying property of the ink tends to decrease. On the other hand, if the total amount of the adhesive is less than 5 parts by weight, it will be difficult to obtain sufficient surface strength.

本發明的印刷用塗覆紙,以全接著劑中10~80重量%為包含呈乳液形態的苯乙烯・丁二烯系共聚物乳膠為較佳,以包含15~70重量%的乳膠為較佳,作為乳膠係以含有苯乙烯・丁二烯系乳膠為較佳。雖本發明的印刷用塗覆紙係具備有2層以上顏料塗覆層,但最接近原紙的層係以全接著劑中10~80重量%為包含乳膠為較佳,遠離原紙的層係以30~60重量%為包含乳膠為較佳。作為其他的接著劑,以使用澱粉類為特佳,其量係最接近原紙的層以全接著劑中30~90重量%為較佳,遠離原紙的層以40~70重量%為較佳。與乳膠相較下,由於澱粉類會提高顏料塗覆液的保水性,故塗覆液不易產生對原紙的滲透,而能以顏料塗覆層有效地被覆原紙。換言之,若使用澱粉類時,以顏料塗覆層所造成的原紙的被覆性將變得良好。其結果,可期待印刷品質(特別是印刷光澤度)的提升、與油墨乾燥性的提升。本發明中,乳膠與澱粉類的比例係以3:5~5:7為較佳。In the coated paper for printing of the present invention, it is preferable that 10 to 80% by weight of the total adhesive is a styrene-butadiene copolymer latex in the form of an emulsion, and 15 to 70% by weight of the latex is more preferred. Preferably, the latex is a styrene-butadiene-based latex. Although the coated paper for printing of the present invention includes two or more pigment coating layers, it is preferable that the layer closest to the base paper contains 10 to 80% by weight of the full adhesive as latex, and the layer away from the base paper is preferably It is preferable that 30 to 60% by weight contains latex. As other adhesives, it is particularly preferable to use starch. The amount closest to the base paper is preferably 30 to 90% by weight of the full adhesive, and the layer away from the base paper is preferably 40 to 70% by weight. Compared with latex, starches can improve the water retention of the pigment coating liquid, so the coating liquid does not easily penetrate the base paper, and the base paper can be effectively covered with the pigment coating layer. In other words, when starches are used, the coverability of the base paper by the pigment coating layer becomes good. As a result, improvement in print quality (especially print gloss) and improvement in ink drying properties can be expected. In the present invention, the ratio of latex to starch is preferably 3: 5 to 5: 7.

3)其他的添加劑   顏料塗覆層係因應所需可包含分散劑、增稠劑、保水劑、消泡劑、防水化劑、染料、著色用顏料等通常的塗覆紙用顏料中所調配的各種助劑。本發明中係以使用具有較前述的白色顏料為大的粒徑的有機物粒子為較佳。藉由使該有機物粒子含有在距離原紙最遠的最外的塗覆層中,從而減低了因印刷後的紙彼此的摩擦所造成紙面污損,並可提升印刷適性。作為有機物粒子係以不用蒸煮的澱粉粒為較佳,相對於前述的顏料藉由使其含有0.5~10重量%,從而可得到上述效果。有機物粒子的粒徑,以藉由雷射繞射式粒度分布測定機所測定的平均粒徑(D50)為8~25μm為較佳。3) Other additives Pigment coatings can be formulated with common coating paper pigments, such as dispersants, thickeners, water-retaining agents, defoamers, waterproofing agents, dyes, and pigments, as needed. Various additives. In the present invention, it is preferable to use organic substance particles having a larger particle size than the aforementioned white pigment. The organic particles are contained in the outermost coating layer farthest from the base paper, thereby reducing the paper surface contamination caused by the friction between the printed paper and improving printability. The organic particles are preferably starch granules that do not need to be cooked. By containing 0.5 to 10% by weight of the pigment, the aforementioned effects can be obtained. The particle diameter of the organic substance particles is preferably an average particle diameter (D50) measured by a laser diffraction particle size distribution measuring device of 8 to 25 μm.

4)塗覆量   顏料塗覆層的塗覆量,每單面的固形分係以2g/m2 以上為較佳,以5g/m2 以上為又較佳,以10g/m2 以上為更佳。若塗覆量未滿5g/m2 時,由於無法充分地覆蓋紙基材表面的凹凸,故印刷油墨的接受性有明顯降低之情形。另一方面,顏料塗覆層的塗覆量係以50g/m2 以下為較佳,以40g/m2 以下為又較佳,以35g/m2 以下為更佳。該塗覆量雖為每單面的全顏料塗覆層的合計的值,但最內的顏料塗覆層(與原紙鄰接的顏料塗覆層)的塗覆量係以2~15g/m2 為較佳,又較佳為5~12g/m2 。又,最外的顏料塗覆層的塗覆量係以6~20g/m2 為較佳,又較佳為8~15g/m2 。由於油墨乾燥性係以最外的塗覆層的影響為大,故最外的塗覆層的塗覆量係以多於最內的顏料塗覆層的塗覆量為較佳。4) Coating amount The coating amount of the pigment coating layer is preferably 2 g / m 2 or more per one side of the solid content, more preferably 5 g / m 2 or more, and more preferably 10 g / m 2 or more. good. If the coating amount is less than 5 g / m 2 , the unevenness of the surface of the paper substrate cannot be sufficiently covered, so that the receptivity of the printing ink may be significantly reduced. On the other hand, the coating amount of the pigment coating layer is preferably 50 g / m 2 or less, more preferably 40 g / m 2 or less, and even more preferably 35 g / m 2 or less. Although this coating amount is the total value of the full pigment coating layer per one side, the coating amount of the innermost pigment coating layer (pigment coating layer adjacent to the base paper) is 2 to 15 g / m 2 It is more preferable, and more preferably 5 to 12 g / m 2 . The coating amount of the outermost pigment coating layer is preferably 6 to 20 g / m 2 , and more preferably 8 to 15 g / m 2 . Since the ink drying property is greatly affected by the outermost coating layer, the coating amount of the outermost coating layer is preferably more than that of the innermost pigment coating layer.

(2)原紙 1)紙漿   原紙中係可使用周知的紙漿。作為周知的紙漿,可舉出化學紙漿、磨木紙漿(GP)、木片磨木紙漿(RGP)、熱磨紙漿(TMP)、化學熱磨紙漿(CTMP)、化學磨木紙漿(CGP)、半化學紙漿(SCP)、舊紙紙漿等。本發明中係以使用化學紙漿為較佳。化學紙漿有藉由牛皮紙漿法所製造者、與藉由亞硫酸紙漿法所製造者,本發明中係可使用此兩者,但藉由牛皮漿法所製造的化學紙漿就生產成本之方面而言為適合。原料紙漿中所佔的化學紙漿的含有量,就白色度等的觀點而言,以全紙漿中60重量%以上為較佳,以80重量%以上為又較佳,以90重量%以上為更佳,以95重量%以上為特佳。(2) Base paper 1) Pulp The well-known pulp can be used as the base paper. Examples of well-known pulps include chemical pulp, ground wood pulp (GP), wood chip ground pulp (RGP), thermal ground pulp (TMP), chemical thermal ground pulp (CTMP), chemical ground wood pulp (CGP), Chemical pulp (SCP), used paper pulp, etc. In the present invention, it is preferable to use chemical pulp. Chemical pulp is produced by the kraft pulp method and produced by the sulfite pulp method. In the present invention, both of them can be used, but the chemical pulp produced by the kraft pulp method is in terms of production cost. Say fit. From the viewpoint of whiteness and the like, the content of the chemical pulp in the raw pulp is preferably 60% by weight or more in the whole pulp, 80% by weight or more is more preferable, and 90% by weight or more is more preferable. Preferably, 95% by weight or more is particularly preferred.

2)填料   原紙中係可使用周知的填料。作為周知的填料,可舉出重質碳酸鈣、輕質碳酸鈣、黏土、二氧化矽、輕質碳酸鈣-二氧化矽複合物、高嶺土、燒成高嶺土、層狀高嶺土、白碳黑、滑石、碳酸鎂、碳酸鋇、硫酸鋇、氫氧化鋁、氫氧化鈣、氫氧化鎂、氫氧化鋅、氧化鋅、氧化鈦、經矽酸鈉的礦酸之中和所製造的非晶質二氧化矽等的無機填料、或脲-甲醛樹脂、三聚氰胺系樹脂、聚苯乙烯樹脂、苯酚樹脂等的有機填料。其中,為了提升不透明度,亦可較佳使用作為中性造紙或鹼性造紙之代表性的填料之重質碳酸鈣或輕質碳酸鈣。使用作為填料的碳酸鈣係可以是前述的第1碳酸鈣,也可以是第2碳酸鈣,但以輕質碳酸鈣為較佳。紙中填料率並無特別限制,但以1~40重量%為較佳,以10~35重量%為更佳。若考慮原紙的強度等時,又較佳為10~20重量%。2) Fillers Well-known fillers can be used in base paper. Examples of well-known fillers include heavy calcium carbonate, light calcium carbonate, clay, silica, light calcium carbonate-silica complex, kaolin, fired kaolin, layered kaolin, white carbon black, talc , Magnesium carbonate, barium carbonate, barium sulfate, aluminum hydroxide, calcium hydroxide, magnesium hydroxide, zinc hydroxide, zinc oxide, titanium oxide, neutralized by the mineral acid produced by sodium silicate Inorganic fillers such as silicon, or organic fillers such as urea-formaldehyde resin, melamine resin, polystyrene resin, and phenol resin. Among them, in order to improve the opacity, heavy calcium carbonate or light calcium carbonate, which is a representative filler for neutral papermaking or alkaline papermaking, may also be preferably used. The calcium carbonate system used as the filler may be the aforementioned first calcium carbonate or the second calcium carbonate, but a light calcium carbonate is preferred. The filler ratio in the paper is not particularly limited, but is preferably 1 to 40% by weight, and more preferably 10 to 35% by weight. When the strength of the base paper is taken into consideration, it is preferably 10 to 20% by weight.

3)其他   也可使用周知的製紙用添加劑。因應所需可使用例如硫酸鋁或各種的陰離子性、陽離子性、非離子性、或者兩性的產率提升劑、濾水性提升劑、各種紙力提高劑或內施膠劑等的造紙用內添助劑。作為乾燥紙力提升劑可舉出聚丙烯醯胺、陽離子化澱粉等,作為濕潤紙力提升劑可舉出聚醯胺多胺環氧氯丙烷等。該等之藥品係可在沒有質地或操作性等的影響的範圍內來做添加。作為內施膠劑可舉出烷基烯酮二聚體或烯基琥珀酸酐、松香施膠劑等。進而,因應所需也可添加染料、顏料、螢光增白劑、pH調整劑、消泡劑、樹脂控制劑、腐漿控制劑等。3) Others 周 Known paper-making additives can also be used. For example, aluminum sulfate or various anionic, cationic, nonionic, or amphoteric yield enhancers, water filter enhancers, various paper strength enhancers, or internal sizing agents can be used as required. Auxiliaries. Examples of the dry paper strength enhancer include polypropylene amidamine and cationized starch, and examples of the wet paper strength enhancer include polyamine polyamine epichlorohydrin. These medicines can be added within the range where there is no effect on the texture or operability. Examples of the internal sizing agent include an alkylketene dimer, an alkenyl succinic anhydride, and a rosin sizing agent. Furthermore, dyes, pigments, fluorescent whitening agents, pH adjusters, defoamers, resin control agents, slurry control agents, etc. may be added as needed.

4)原紙的基重   本發明的印刷用塗覆紙的原紙的基重係以40~160 g/m2 為較佳,以45~150g/m2 為又較佳,以50~140g/m2 為更佳。4) Basis weight of base paper The basis weight of the base paper of the coated paper for printing of the present invention is preferably 40 to 160 g / m 2, more preferably 45 to 150 g / m 2 , and 50 to 140 g / m 2 is better.

5)透明塗覆層   本發明的印刷用塗覆紙係可在上述的原紙的單面或雙面上具有透明(clear)塗覆層。藉由在原紙上施予透明塗覆,從而可使原紙的表面強度或平滑性提升,又可提升進行顏料塗覆時之塗覆適性。透明塗覆的量係以每單面的固形分為0.1~3.0g/m2 為較佳,以0.2~2.0g/m2 為又較佳,更佳為0.5~2.0g/m25) Transparent coating layer The coating paper for printing of the present invention may have a clear coating layer on one or both sides of the base paper described above. By applying a transparent coating on the base paper, the surface strength or smoothness of the base paper can be improved, and the coating suitability when pigment coating is performed can be improved. The amount of the transparent coating is preferably 0.1-3.0 g / m 2 per one side of the solid content, more preferably 0.2-2.0 g / m 2, and more preferably 0.5-2.0 g / m 2 .

本發明中所謂的透明塗覆係指使用例如雙輥溝槽施膠壓濾、門輥塗佈機、預計量施膠壓濾、淋幕式塗佈機、噴霧塗佈機等的塗佈機(塗覆機),將澱粉、氧化澱粉、各種改性澱粉(自體改性、陽離子改性等)等的澱粉類、聚丙烯醯胺、聚乙烯醇等的水溶性高分子作為主成分的塗佈塗覆液(表面處理液),進行塗佈塗覆(施膠壓濾/size press)至原紙上。也可使透明塗覆液中含有施膠劑(sizing agent)並來進行塗覆。本發明中係以塗覆澱粉為較佳。The so-called transparent coating in the present invention refers to a coating machine using, for example, a two-roll groove sizing press, a door roll coater, an expected amount of sizing press, a curtain coater, a spray coater, etc. (Coating machine), which uses starch, oxidized starch, various modified starches (auto-modified, cationic modification, etc.), water-soluble polymers such as polyacrylamide, polyvinyl alcohol, etc. as the main component A coating liquid (surface treatment liquid) is applied, and a coating (size press / size press) is performed on the base paper. The transparent coating liquid may be coated with a sizing agent. In the present invention, coated starch is preferred.

2.製造方法   本發明的印刷用塗覆紙係可依周知的方法來製造,但以藉由將包含顏料與接著劑的顏料塗覆液塗覆在原紙上從而來製造為較佳。 (1)原紙的調製   對於被用於本發明中所使用的原紙的原料係已如上述般。原紙係可依周知的造紙方法來製造。可使用例如包含頂網等的長網造紙機、頂網成型器(on top former)、夾網成型器、圓網造紙機、併用長網造紙機與圓網造紙機的紙板造紙機、揚克烘乾造紙機(Yankee drye)等來進行。造紙時的pH係可以是酸性、中性、鹼性中之任意,但以中性或鹼性為較佳。造紙速度也無特別限定。本發明中所使用的原紙係可以是單層也可以是多層,但以單層的原紙為適合使用。2. Manufacturing method The coated paper for printing of the present invention can be manufactured by a known method, but is preferably manufactured by coating a base paper with a pigment coating solution containing a pigment and an adhesive. (1) Preparation of base paper The raw materials used for the base paper used in the present invention are as described above. The base paper can be produced by a known papermaking method. For example, a Fourdrinier paper machine including a top screen, an on top former, a pinch former, a cylinder paper machine, a paperboard paper machine using a fourdrinier paper machine and a cylinder paper machine, Yankee can be used. Drying paper machine (Yankee drye) and the like. The pH at the time of papermaking may be any of acidic, neutral, and alkaline, but neutral or alkaline is preferred. The papermaking speed is also not particularly limited. The base paper system used in the present invention may be a single layer or a multilayer, but a single-layer base paper is suitable for use.

(2)原紙的平滑化處理   在所得到的原紙上塗覆顏料塗覆液前,以藉由各種壓光機裝置來對原紙施予平滑化處理為較佳。作為上述壓光機裝置係可適合使用超級壓光機、軟壓光機等的一般所使用的壓光機裝置。作為壓光機加工條件,係因應所要求之品質來適當選擇剛性輥的溫度、壓光機壓力、壓區數、輥速度、壓光前的紙水分等。本發明中,為了維持在仿消光感的風格狀態下來賦予平滑性,以對原紙施予壓光機處理為較佳。藉由對原紙施予壓光機處理,從而使原紙的平滑性提升、且顏料塗覆適性。(2) Smoothing treatment of base paper Before coating the obtained base paper with a pigment coating liquid, it is preferable to apply smoothing treatment to the base paper by various calender devices. As the calender device, a generally used calender device such as a super calender or a soft calender can be suitably used. As the processing conditions of the calender, the temperature of the rigid roll, the pressure of the calender, the number of nips, the roll speed, and the moisture of the paper before calendering are appropriately selected according to the required quality. In the present invention, in order to maintain smoothness in a state that mimics a matting feeling, it is preferable to apply a calender treatment to the base paper. By applying a calender treatment to the base paper, the smoothness of the base paper is improved, and the pigment coating is suitable.

(3)顏料塗覆液的調製   顏料塗覆液係可藉由將顏料、接著劑、及因應所需的添加劑分散或溶解至水中從而調製。依可形成前述顏料塗覆層之方式來調整各成分的調配。若進行刮刀塗覆之情形時,顏料塗覆液的固形分濃度係以40~70重量%為較佳,又較佳為60~70重量%。顏料塗覆液的黏度係以藉由室溫下以60rpm所測定的B型黏度為500~5000mPa・s的範圍內為較佳。又,若利用輥塗佈機來進行塗覆之情形時,顏料塗覆液的固形分係以50~70重量%為較佳,又較佳為60~70重量%。若固形分重量過低時將會引起回流等,若過高時則刮刀負荷會變大,而演變成刮刀的磨損等,對於操作性產生影響。(3) Preparation of pigment coating liquid Pigment coating liquid can be prepared by dispersing or dissolving pigment, adhesive, and necessary additives in water. The composition of each component is adjusted so that the said pigment coating layer may be formed. In the case of doctor blade coating, the solid content concentration of the pigment coating liquid is preferably 40 to 70% by weight, and more preferably 60 to 70% by weight. The viscosity of the pigment coating liquid is preferably within a range of 500 to 5000 mPa ・ s of the B-type viscosity measured at 60 rpm at room temperature. When coating is performed by a roll coater, the solid content of the pigment coating liquid is preferably 50 to 70% by weight, and more preferably 60 to 70% by weight. If the solid weight is too low, backflow will occur, and if it is too high, the blade load will increase, which will cause the blade to wear, etc., which will affect the operability.

(4)塗覆方法   塗覆方法並無限定,可使用輥塗佈機、刮刀塗佈機等的周知的塗覆方法。塗覆速度也無特別限定,若為刮刀塗佈機之情形時係以400~1800m/分鐘,若為輥塗佈機之情形時係以400~2000m/分鐘為較佳。本發明中係可以是利用刮刀塗佈機來塗覆1層的顏料塗覆層,也可以是於利用輥塗佈機來塗覆後,再利用刮刀塗佈機進行塗覆、或可於利用刮刀塗佈機來塗覆後,再利用刮刀塗佈機進行塗覆,但為了使表面的平滑性提升,對於最外的塗覆層的塗覆係以使用刮刀塗佈機為較佳。(4) Coating method The coating method is not limited, and a known coating method such as a roll coater or a blade coater can be used. The coating speed is also not particularly limited. In the case of a blade coater, 400 to 1800 m / min is preferred, and in the case of a roll coater, 400 to 2000 m / min is preferred. In the present invention, a pigment coating layer may be applied by a blade coater, or after coating by a roller coater, and then coated by a blade coater, or may be used. After coating with a blade coater, coating is performed with a blade coater, but in order to improve the smoothness of the surface, it is preferable to use a blade coater for the coating of the outermost coating layer.

本發明的印刷用塗覆紙係為了提升印刷光澤度,而有需要設置2層以上的顏料塗覆層。藉由製成2層以上顏料塗覆層,從而使纖維被覆性提升、且平滑度也變高。若製成3層以上時,為了增加塗覆量來提升塗覆紙的品質,但就成本或操作性之點而言,層數係以2層為較佳。如前述般,在原紙的上設置透明塗覆層,在其上也可設置2層以上的顏料塗覆層。In order to improve the printing gloss, the coated coated paper of the present invention needs to be provided with two or more pigment coating layers. By forming two or more pigment coating layers, the fiber covering property is improved and the smoothness is also improved. In the case of three or more layers, in order to increase the coating amount to improve the quality of the coated paper, the number of layers is preferably two in terms of cost or operability. As described above, a transparent coating layer is provided on the base paper, and two or more pigment coating layers may be provided thereon.

(5)其他的步驟   使濕潤狀態的塗覆層乾燥的方法並無限定,可使用例如蒸氣加熱缸筒、加熱熱風空氣乾燥機、瓦斯加熱乾燥機、電熱乾燥機、或紅外線加熱乾燥機等。(5) Other steps 的 The method for drying the wet coating layer is not limited. For example, a steam heating cylinder, a heated hot air dryer, a gas heating dryer, an electric heating dryer, or an infrared heating dryer can be used.

本發明印刷用塗覆紙係可因應所需對如以上之方式所製造的塗覆紙來進行表面處理,但因變得難以得到本發明的仿消光感的風格,故以不進行壓光機處理為宜。進行壓光機處理之情形時,可適合使用超級壓光機、軟壓光機等的一般所使用的壓光機裝置。作為壓光機加工條件,係因應所要求之品質來適當選擇剛性輥的溫度、壓光機壓力、壓區數、輥速度、壓光前的紙水分等,但本發明的印刷用塗覆紙時,為了展現出仿消光感的風格,故以在低壓下的壓光機處理為較佳。The coated paper for printing of the present invention can be surface-treated on the coated paper manufactured as described above according to need. However, it becomes difficult to obtain the style of the matte feeling of the present invention, so the calender is not used. Handle appropriately. In the case of a calender treatment, a generally used calender device such as a super calender or a soft calender can be suitably used. As the processing conditions of the calender, the temperature of the rigid roll, the pressure of the calender, the number of nips, the roll speed, the moisture of the paper before calendering, etc. are appropriately selected according to the required quality, but the coated paper for printing of the present invention At this time, in order to show the style of extinction, it is better to use a calender under low pressure.

3.紙質 (1)白紙光澤度   白紙光澤度係表示以白紙時的光澤程度的指標,故本發明中係根據JIS-P8142來進行測定。本發明的印刷用塗覆紙,在一樣態中係白紙光澤與印刷光澤的差異較大的仿消光感的印刷用塗覆紙。此情形時,白紙光澤度係以40%以下為較佳,以36%以下為更佳,以未滿32%為又較佳。白紙光澤度的下限並無限定,但以15%以上為較佳。3. Paper quality (1) Glossiness of white paper Glossiness of white paper is an index indicating the glossiness when white paper is used. Therefore, in the present invention, it is measured in accordance with JIS-P8142. The coated paper for printing of the present invention is a coated paper for imitation matting that has a large difference between white paper gloss and printing gloss in the same state. In this case, the gloss of the white paper is preferably 40% or less, more preferably 36% or less, and even less than 32%. The lower limit of the white paper gloss is not limited, but it is preferably 15% or more.

(2)印刷光澤度(光澤度差)   印刷光澤度係表示印刷後的印刷物的光澤程度的指標,故本發明中係根據後述的方法來進行測定。對於仿消光感的印刷用塗覆紙而言,印刷光澤度(CM)係以57以上為較佳,以58%以上為較佳。此情形時的印刷光澤度的上限並無限定,但以75%以下為較佳。本發明中,從印刷光澤度扣除白紙光澤度的光澤度差若為15以上時,可得到充分的印刷部分與白紙部分的光澤的差異,故能夠稱為更加鮮明的印刷物。(2) Printing glossiness (gloss difference) Printing glossiness is an index indicating the glossiness of printed matter after printing. Therefore, in the present invention, it is measured by a method described later. For the coated paper for printing with matte feeling, the printing gloss (CM) is preferably 57 or more, and more preferably 58% or more. The upper limit of the printing gloss in this case is not limited, but it is preferably 75% or less. In the present invention, if the gloss difference after subtracting the gloss of the white paper from the gloss of the printing is 15 or more, a sufficient gloss difference between the printed portion and the white paper portion can be obtained, and thus it can be called a more vivid printed matter.

(3)油墨乾燥性   本發明的印刷用塗覆紙,即使是印刷光澤度高,但油墨乾燥性亦為優異。印刷用塗覆紙的油墨乾燥性之優劣,一般而言可藉由確認堆疊印刷後的印刷品時,油墨轉移至其他地方的黏髒或印刷面的摩擦污損等來進行辨識。(3) Ink drying property The coated paper for printing of the present invention is excellent in ink drying property even if the printing gloss is high. In general, the dryness of the ink of the coated paper for printing can be identified by confirming the dirt on the ink transferred to another place or the friction and stain on the printing surface when the printed matter is stacked and printed.

(3-1)依據氮吸附法(紙的總細孔容積)之評估   本發明中係藉由使用能以低壓條件下進行測定的氮吸附法來公認地評估顏料塗覆層的細孔構造,從而可評估本發明的印刷用塗覆紙的油墨乾燥性。關於顏料塗覆層與溶劑吸收性的關係,將在顏料塗覆層中所存在的多數的微細的孔當作是毛細管聚集體的(1)式所表示的Lucas-Washburn公式係廣為使用。於此,L係溶劑的浸透深度,r係毛細管的平均半徑,t係時間,γ係溶劑的表面張力,θ係毛細管壁與溶劑的接觸角,η係溶劑的黏度。又,若將顏料塗覆層的細孔構造假設為排列n個平均半徑r的圓筒管時,由於對顏料塗覆層的油墨溶劑浸透量ν係能以式(2)來表示,故式(1)係可變形如式(3)般。d係顏料塗覆層的厚度,V係顏料塗覆層的細孔容積,k係油墨的黏度。意即,顏料塗覆層中的細孔直徑、細孔容積越大、又顏料塗覆層厚度越小,則每一定時間的溶劑浸透量將變多,故認為油墨乾燥性為提升。本發明中係將藉由Tristar3000所得到的細孔容積視為顏料塗覆層的細孔容積,將平均細孔直徑視為顏料塗覆層的平均細孔直徑。(3-1) Evaluation by nitrogen adsorption method (total pore volume of paper) In the present invention, the pore structure of a pigment coating layer is recognized by using a nitrogen adsorption method that can be measured under low pressure conditions. Thereby, the ink drying property of the coated paper for printing of the present invention can be evaluated. Regarding the relationship between the pigment coating layer and the solvent absorptivity, the Lucas-Washburn formula represented by the formula (1) in which many fine pores existing in the pigment coating layer are capillary aggregates is widely used. Here, the penetration depth of the L-based solvent, the average radius of the r-based capillary, the t-time, the surface tension of the γ-based solvent, the contact angle of the θ-based capillary wall and the solvent, and the viscosity of the η-based solvent. In addition, if the pore structure of the pigment coating layer is assumed to be a cylindrical tube in which n average radii r are arranged, since the solvent solvent penetration amount ν of the pigment coating layer can be expressed by formula (2), (1) is deformable like formula (3). The thickness of the d-based pigment coating layer, the pore volume of the V-based pigment coating layer, and the viscosity of the k-based ink. That is to say, the larger the pore diameter and the pore volume in the pigment coating layer, and the smaller the thickness of the pigment coating layer, the more the solvent permeation amount will increase every certain time, so it is considered that the ink drying performance is improved. In the present invention, the pore volume obtained by Tristar 3000 is regarded as the pore volume of the pigment coating layer, and the average pore diameter is regarded as the average pore diameter of the pigment coating layer.

本發明的印刷用塗覆紙的細孔容積V係以超過0.04cm3 /g為較佳,以0.045cm3 /g以上為又較佳。上限係以0.09cm3 /g以下為較佳,以0.085cm3 /g以下為又較佳,以0.08cm3 /g以下為更佳。細孔容積V較0.04cm3 /g高的印刷用塗覆紙係對於油墨乾燥性為優異。Printing of the present invention coated paper-based pore volume V of more than 0.04cm 3 / g are preferred to 0.045cm 3 / g or more and is preferred. The upper limit is preferably 0.09 cm 3 / g or less, more preferably 0.085 cm 3 / g or less, and even more preferably 0.08 cm 3 / g or less. Printing coated paper systems having a pore volume V higher than 0.04 cm 3 / g are excellent in ink drying properties.

本發明的印刷用塗覆紙的總細孔容積(cm3 /m2 )係依據細孔容積V(cm3 /g)×塗覆量c(g/m2 )來做定義,該值係以0.55cm3 /m2 以上為較佳,以0.60cm3 /m2 以上為又較佳,以0.80cm3 /m2 以上為更佳。總細孔容積的上限係以1.00cm3 /m2 以下為較佳,以0.95cm3 /m2 以下為又較佳。The total pore volume (cm 3 / m 2 ) of the coated paper for printing of the present invention is defined based on the pore volume V (cm 3 / g) × the coating amount c (g / m 2 ), and the value is to 0.55cm 3 / m 2 or more is preferred to 0.60cm 3 / m 2 or more is further preferred to 0.80cm 3 / m 2 or more is more preferable. The upper limit to the total pore volume based 1.00cm 3 / m 2 or less is preferred to 0.95cm 3 / m 2 or less and is preferred.

本發明的印刷用塗覆紙的平均細孔直徑m係以30nm以上為較佳。平均細孔直徑m的上限係以60nm以下為較佳。具體而言,本發明中平均細孔直徑係以依據氮吸附法所得到的吸附解吸等溫線而求出。本申請案中,將藉由Tristar3000所得到的平均細孔直徑視為顏料塗覆層的平均細孔直徑。 [實施例]The average pore diameter m of the coated coated paper of the present invention is preferably 30 nm or more. The upper limit of the average pore diameter m is preferably 60 nm or less. Specifically, the average pore diameter in the present invention is obtained from an adsorption-desorption isotherm obtained by a nitrogen adsorption method. In this application, the average pore diameter obtained by Tristar 3000 is regarded as the average pore diameter of the pigment coating layer. [Example]

以下為舉出實施例來具體說明本發明,但本發明並不受限於該等。重量份及重量%係固形分換算的值。Hereinafter, the present invention will be specifically described with examples, but the present invention is not limited thereto. Parts by weight and% by weight are values converted to solid content.

<評估方法> (1)基重   依據JIS P 8124來進行測定。<Evaluation method> (1) Basis weight Measured in accordance with JIS P 8124.

(2)ISO白色度:依據JIS P8148,藉由村上色彩(股)公司製色差計CMS-35SPX,以包含紫外光之條件下來進行測定。(2) ISO whiteness: According to JIS P8148, the color difference meter CMS-35SPX manufactured by Murakami Color Co., Ltd. was measured under conditions including ultraviolet light.

(3)白紙光澤度   依據JIS-P8142來進行測定。(3) Gloss of white paper Measured in accordance with JIS-P8142.

(4)油墨乾燥性   藉由Roland公司製平版單頁印刷機(4色),使用平版單頁用油墨(東洋油墨製NEX-M),以印刷速度8000張/hr下,以滿塗部分的上油墨濃度成為墨2.00之方式來進行印刷後,從印刷後立即以每10分鐘利用指尖來觸摸油墨滿塗印刷部分,對油墨乾燥的快速程度來進行官能評估。   A:良好   B:不良(4) Ink dryness A lithographic single-page printing machine (4 colors) manufactured by Roland was used, and a lithographic single-page printing ink (NEX-M, manufactured by Toyo Ink) was used at a printing speed of 8000 sheets / hr. Immediately after printing, the ink concentration was changed to ink 2.00, and immediately after printing, the full-printed portion of the ink was touched with a fingertip every 10 minutes, and the fastness of the ink drying was evaluated. A: Good B: Bad

(5)印刷光澤度(光澤度差)   藉由Roland公司製平版單頁印刷機(4色),使用平版單頁用油墨(東洋油墨(股)製NEX-M),以印刷速度8000張/hr下,以滿塗部分的上油墨濃度成為藍1.60、紅1.50之方式按照藍紅(CM)之順序來進行印刷。依據JIS P-8142來測定所得到的印刷物的藍紅(CM)滿塗印刷部分的光澤度。將從印刷光澤度扣除白紙光澤度的值設為光澤度差,若光澤度差為15百分點以上時,可得到充分的印刷部分與白紙部分的光澤的差異,故可稱為美觀佳的印刷物。   光澤度差=印刷光澤度(%)-白紙光澤度(%)(5) Printing gloss (gloss difference) A lithographic single-page printer (4 colors) manufactured by Roland, using lithographic single-page ink (NEX-M manufactured by Toyo Ink Co., Ltd.) at a printing speed of 8,000 sheets / In hr, printing was performed in the order of blue-red (CM) so that the upper ink density of the full-coat portion became blue 1.60 and red 1.50. The gloss of the blue-red (CM) full-coated printed portion of the obtained printed matter was measured in accordance with JIS P-8142. The value obtained by subtracting the gloss of the white paper from the printing gloss is regarded as the gloss difference. If the gloss difference is 15% or more, a sufficient gloss difference between the printed portion and the white paper portion can be obtained. Therefore, it can be called a printed product with good appearance.差 Gloss difference = printing gloss (%)-white paper gloss (%)

(6)細孔容積等 (i)樣品調製與測定   依據氮吸附法來求出塗覆紙的細孔容積、總細孔容積、平均細孔直徑。 (樣品的調製)   以厚度方向成為均等之方式將長40cm×寬15cm的紙樣品分割成2層,從而得到包含顏料塗覆層與原紙層的層合體。若為雙面塗覆紙之情形時,可得到該層合體為2個與主要由原紙層所構成的層為1個;若為單面塗覆紙之情形時,可得到該層合體為1個與主要由原紙層所構成的層為1個。將包含顏料塗覆層與原紙層的層合體作為樣品薄片並使用於測定。若為雙面塗覆紙之情形時,將任一者作為樣品薄片並使用於測定。測定樣品薄片的基重t(g/m2 )。選擇1張的樣品薄片中之任意的4點,並裁斷成長條狀後,以測定樣品成為絕對乾燥重量1~2g左右之方式來放入測定槽中。將此時的絕對乾燥重量設為w(g)。在真空狀態、處理溫度120℃下來進行一晩的前處理。 (測定)   使用前述裝置,從前述測定樣品的顏料塗覆層側來測定細孔容積及平均細孔直徑。具體而言係使用BJH法依據吸附解吸等溫線來求出前述測定樣品的細孔容積及平均細孔直徑,取得4樣品的平均值,並設為測定樣品的細孔容積V’及平均細孔直徑m’。對於細孔容積V’係換算成每單位塗覆量的值,並將其設為本發明的顏料塗覆層的細孔容積V。對於所得到的平均細孔直徑m’係直接設為本發明的顏料塗覆層的平均細孔直徑m。測定樣品的顏料塗覆層重量係由下述式來算出:顏料塗覆層重量(g)=測定樣品的絕對乾燥重量w(g)×塗覆量c(g/m2 )÷樣品薄片的基重t(g/m2 )。塗覆量c(g/m2 )係藉由後述的測定方法來求出。測定及解析係使用島津製作所股份有限公司製Tristar3000。 (塗覆量)   依據日本專利第5827187號所記載之方法來測定塗覆量。具體而言係藉由以下之程序來進行測定。   1) 將測定樣品(紙)切斷成5cm×5cm的大小,以溫度23℃、相對濕度50%下來測定調濕後重量x。   2) 以顏料塗覆層接觸於苯乙烯聚合物板上之方式來放置該樣品,並利用鉗夾來固定在錶玻璃上。   3) 放入至120~150℃的乾燥機中,使苯乙烯聚合物熔融並使其與顏料塗覆層密著,放冷後以溫度23℃、相對濕度50%下進行約半日的調濕並測定重量y。   4) 將前步驟所得到的測定樣品浸漬在乙二胺銅溶液中約3~4小時後,使用毛刷並謹慎地剝離原紙層與顏料塗覆層。直到附著於顏料塗覆層的紙漿纖維沒有為止,並反覆進行該步驟。   5) 將顏料塗覆層水洗並使其乾燥,以溫度23℃、相對濕度50%下進行約半日的調濕後並測定重量z。   6) 依據以下之式來算出塗覆量。   塗覆量c(g/m2 )=(x-A)×400   A=y-z(6) Pore volume, etc. (i) Sample preparation and measurement The pore volume, total pore volume, and average pore diameter of the coated paper were obtained according to the nitrogen adsorption method. (Preparation of sample) A paper sample having a length of 40 cm and a width of 15 cm was divided into two layers so that the thickness direction became uniform, thereby obtaining a laminate including a pigment coating layer and a base paper layer. In the case of double-sided coated paper, it can be obtained that the laminated body is 2 and the layer mainly composed of the base paper layer is 1. In the case of single-sided coated paper, the laminated body is obtained as 1. There are only one layer and a base paper layer. A laminate including a pigment coating layer and a base paper layer was used as a sample sheet and used for measurement. In the case of double-coated paper, either one is used as a sample sheet and used for measurement. The basis weight t (g / m 2 ) of the sample sheet was measured. Any four points of one sample sheet were selected, and after being cut into long strips, the measurement sample was placed in a measurement tank such that the absolute dry weight was about 1 to 2 g. Let the absolute dry weight at this time be w (g). The pretreatment was performed in a vacuum in a vacuum at a processing temperature of 120 ° C. (Measurement) The pore volume and the average pore diameter were measured from the pigment coating layer side of the measurement sample using the device. Specifically, the BJH method was used to obtain the pore volume and average pore diameter of the measurement sample based on the adsorption-desorption isotherm, and an average of 4 samples was obtained. The pore volume V ′ and the average pore diameter of the measurement sample were determined. Hole diameter m '. The pore volume V ′ is a value converted into a coating amount per unit, and is set as the pore volume V of the pigment coating layer of the present invention. The average pore diameter m 'obtained is directly the average pore diameter m of the pigment coating layer of the present invention. The weight of the pigment coating layer of the measurement sample is calculated from the following formula: Pigment coating weight (g) = absolute dry weight of the measurement sample w (g) × coating amount c (g / m 2 ) ÷ Basis weight t (g / m 2 ). The coating amount c (g / m 2 ) was determined by a measurement method described later. For the measurement and analysis, Tristar 3000 manufactured by Shimadzu Corporation was used. (Coating amount) The coating amount was measured according to the method described in Japanese Patent No. 5827187. Specifically, the measurement was performed by the following procedure. 1) The measurement sample (paper) was cut into a size of 5 cm x 5 cm, and the weight x after conditioning was measured at a temperature of 23 ° C and a relative humidity of 50%. 2) The sample was placed in such a way that the pigment coating layer was in contact with the styrene polymer plate, and was fixed on the watch glass with a clamp. 3) Put in a dryer at 120 to 150 ° C to melt the styrene polymer and make it close to the pigment coating layer. After cooling, perform humidity adjustment for about half a day at a temperature of 23 ° C and a relative humidity of 50%. And determine the weight y. 4) After immersing the measurement sample obtained in the previous step in the ethylenediamine copper solution for about 3 to 4 hours, use a brush to carefully peel off the base paper layer and the pigment coating layer. This process is repeated until the pulp fibers adhering to the pigment coating layer are absent. 5) The pigment coating layer was washed with water and dried, and then humidity-controlled at a temperature of 23 ° C. and a relative humidity of 50% for about half a day, and the weight z was measured. 6) Calculate the coating amount based on the following formula. Coating amount c (g / m 2 ) = (xA) × 400 A = yz

[實施例1]   準備使用化學紙漿100重量%並含有作為填料之輕質碳酸鈣13.5重量%的基重75g/m2 的原紙。   作為顏料使用重質碳酸鈣(Fimatec股份有限公司製,商品名:FMT97,D50=0.88μm)100重量份,對此調配作為接著劑之苯乙烯・丁二烯系共聚合乳膠7重量份、氧化澱粉3重量份,進而加入水從而得到固形分濃度65重量%的底塗顏料塗覆液。[Example 1] A base paper having a basis weight of 75 g / m 2 containing 100% by weight of chemical pulp and containing 13.5% by weight of light calcium carbonate as a filler was prepared. 100 parts by weight of heavy calcium carbonate (made by Fimatec Co., Ltd., trade name: FMT97, D50 = 0.88 μm) was used as a pigment. 7 parts by weight of a styrene-butadiene-based copolymer latex was prepared as an adhesive. 3 parts by weight of starch was further added to obtain a primer pigment coating solution having a solid content concentration of 65% by weight.

作為顏料使用第2碳酸鈣之重質碳酸鈣(Fimatec股份有限公司製,商品名:FMT97,D50=0.88μm)55重量份及第1碳酸鈣之微粒重質碳酸鈣(Fimatec股份有限公司製,商品名:FMT100,D50=0.66μm)45重量份,對此調配作為接著劑之苯乙烯・丁二烯系共聚合乳膠4重量份、氧化澱粉6重量份,進而加入水從而得到固形分濃度66重量%的上塗顏料塗覆液。As the pigment, 55 parts by weight of heavy calcium carbonate (manufactured by Fimatec Co., Ltd., trade name: FMT97, D50 = 0.88 μm) of the second calcium carbonate and fine calcium carbonate fine particles (manufactured by Fimatec Co., Ltd., Product name: FMT100, D50 = 0.66 μm) 45 parts by weight, 4 parts by weight of styrene butadiene copolymer latex and 6 parts by weight of oxidized starch were prepared as adhesives, and water was added to obtain a solid concentration of 66. % By weight of pigmented coating liquid.

在前述原紙上,將底塗顏料塗覆液利用刮刀塗佈機以每單面的乾燥塗覆量成為6.5g/m2 之方式來進行雙面塗覆並乾燥。進而,在其上,將上塗顏料塗覆液利用刮刀塗佈機以每單面的乾燥塗覆量成為10.5g/m2 之方式來進行雙面塗覆,從而得到印刷用塗覆紙。對於該印刷用塗覆紙,藉由前述的方法來進行評估。On the base paper, a primer coating liquid was double-coated and dried with a blade coater so that the dry coating amount per side became 6.5 g / m 2 . Furthermore, a double-sided coating was performed on the top pigment coating liquid with a blade coater so that the dry coating amount per side became 10.5 g / m 2 to obtain a coated paper for printing. The coated paper for printing was evaluated by the method described above.

[實施例2]   作為顏料使用自製苛性化輕質碳酸鈣(D50=1.38μm) 97重量份及自製苛性化輕質碳酸鈣(D50=1.02μm)3重量份,對此調配作為接著劑之苯乙烯・丁二烯系共聚合乳膠2.5重量份、氧化澱粉21重量份,進而加入水從而得到固形分濃度50重量%的底塗顏料塗覆液。[Example 2] As a pigment, 97 parts by weight of self-made caustic light calcium carbonate (D50 = 1.38 μm) and 3 parts by weight of self-made caustic light calcium carbonate (D50 = 1.02 μm) were used, and benzene was prepared as an adhesive for this. 2.5 parts by weight of ethylene fluorene butadiene-based copolymer latex and 21 parts by weight of oxidized starch, and water was added to obtain a primer coating solution having a solid content concentration of 50% by weight.

作為顏料使用第1碳酸鈣之自製微粒苛性化輕質碳酸鈣(D50=0.64μm)44.5重量份及第2碳酸鈣之自製苛性化輕質碳酸鈣(D50=1.02μm)55重量份,對此調配作為接著劑之苯乙烯・丁二烯系共聚合乳膠4重量份及氧化澱粉6重量份、不用蒸煮的澱粉粒(Japan Corn Starch公司製,商品名:Y-3P)0.5重量份,進而加入水從而可得到固形分濃度66重量%的上塗顏料塗覆液。As pigments, 44.5 parts by weight of caustic light-weight calcium carbonate (D50 = 0.64 μm) made from homemade microparticles of the first calcium carbonate and 55 parts by weight of self-made caustic light calcium carbonate (D50 = 1.02 μm) from the second calcium carbonate were used. 4 parts by weight of styrene-butadiene-based copolymer latex and 6 parts by weight of oxidized starch as adhesives, and 0.5 parts by weight of starch granules (manufactured by Japan Corn Starch, trade name: Y-3P) were added, and further added. With water, a top pigment coating liquid having a solid content concentration of 66% by weight can be obtained.

在前述原紙上,將底塗顏料塗覆液利用門輥塗佈機以每單面的乾燥塗覆量成為4.5g/m2 之方式來進行雙面塗覆並乾燥。進而,在其上,將上塗顏料塗覆液利用刮刀塗佈機以每單面的乾燥塗覆量成為10.5g/m2 之方式來進行雙面塗覆,從而得到印刷用塗覆紙。對於該印刷用塗覆紙,藉由前述的方法來進行評估。On the base paper, a primer coating liquid was double-coated and dried with a door roller coater so that the dry coating amount per side became 4.5 g / m 2 . Furthermore, a double-sided coating was performed on the top pigment coating liquid with a blade coater so that the dry coating amount per side became 10.5 g / m 2 to obtain a coated paper for printing. The coated paper for printing was evaluated by the method described above.

[實施例3]   將實施例1中已調製的上塗顏料塗覆液之第1碳酸鈣、苯乙烯・丁二烯系共聚合乳膠、及氧化澱粉的調配量變更成如表1所表示的量、且調配不用蒸煮的澱粉粒(Japan Corn Starch公司製,商品名:Y-3P)0.5重量份,來調製上塗顏料塗覆液。除了使用該塗覆液以外,與實施例1以相同之方式來製造印刷用塗覆紙並進行評估。[Example 3] The amount of the first calcium carbonate, styrene-butadiene-based copolymer latex, and oxidized starch prepared in Example 1 was changed to the amounts shown in Table 1. In addition, 0.5 parts by weight of starch granules (manufactured by Japan Corn Starch, trade name: Y-3P) were prepared without cooking to prepare a pigment coating liquid. A coated paper for printing was produced and evaluated in the same manner as in Example 1 except that this coating liquid was used.

[實施例4]   作為顏料使用重質碳酸鈣(Fimatec股份有限公司製,商品名:FMT90,D50=1.15μm)100重量份,對此調配作為接著劑之苯乙烯・丁二烯系共聚合乳膠7重量份、氧化澱粉3重量份,進而加入水從而得到固形分濃度70重量%的底塗顏料塗覆液。[Example 4] As a pigment, 100 parts by weight of heavy calcium carbonate (manufactured by Fimatec Co., Ltd., trade name: FMT90, D50 = 1.15 μm) was used, and a styrene-butadiene-based copolymer latex was prepared as an adhesive. 7 parts by weight and 3 parts by weight of oxidized starch, and water was further added to obtain a primer pigment coating solution having a solid content concentration of 70% by weight.

作為顏料使用第2碳酸鈣之重質碳酸鈣(Imerys製,商品名:C90,D50=1.18μm)55重量份及第1碳酸鈣之微粒重質碳酸鈣(Imerys製,Carbilux,D50=0.64μm)44.5重量份,對此調配作為接著劑之苯乙烯・丁二烯系共聚合乳膠4重量份及氧化澱粉6重量份、不用蒸煮的澱粉粒(Japan Corn Starch公司製,商品名:Y-3P)0.5重量份,進而加入水從而得到固形分濃度66重量%的上塗顏料塗覆液。使用該等之塗覆液與實施例1以相同之方式來製造印刷用塗覆紙並進行評估。As the pigment, 55 parts by weight of heavy calcium carbonate (manufactured by Imerys, trade name: C90, D50 = 1.18 μm) of the second calcium carbonate, and fine particles of first calcium carbonate (imerys, Carbilux, D50 = 0.64 μm) 44.5 parts by weight, 4 parts by weight of a styrene-butadiene-based copolymer latex and 6 parts by weight of oxidized starch were prepared as an adhesive, and starch granules without cooking (made by Japan Corn Starch, trade name: Y-3P) ) 0.5 parts by weight, and water was further added to obtain a top pigment coating liquid having a solid content concentration of 66% by weight. Using these coating liquids, coated paper for printing was produced and evaluated in the same manner as in Example 1.

[比較例1]   調配作為顏料之重質碳酸鈣(Fimatec股份有限公司製,商品名:FMT75,D50=1.65μm)85重量份、高嶺土(Imerys公司製,商品名:KCS,D50=4.05μm)15重量份、作為接著劑之苯乙烯・丁二烯系共聚合乳膠4.3重量份、氧化澱粉6.5重量份,進而加入水從而得到固形分濃度66重量%的顏料塗覆液。使用該塗覆液與實施例1以相同之方式來製造具有1層的顏料塗覆層的印刷用塗覆紙並進行評估。[Comparative Example 1] 85 parts by weight of calcium carbonate (made by Fimatec Co., Ltd., trade name: FMT75, D50 = 1.65 μm), kaolin (made by Imerys, trade name: KCS, D50 = 4.05 μm) were prepared as pigment 15 parts by weight, 4.3 parts by weight of a styrene-butadiene-based copolymer latex as an adhesive, and 6.5 parts by weight of oxidized starch, and water was added to obtain a pigment coating solution having a solid content concentration of 66% by weight. Using this coating liquid, a coated paper for printing having a pigment coating layer of 1 layer was produced and evaluated in the same manner as in Example 1.

[比較例2]   調配作為顏料之重質碳酸鈣(Imerys公司製,商品名:C97,D50=0.91μm)100重量份、作為接著劑之苯乙烯・丁二烯系共聚合乳膠7.6重量份、氧化澱粉6重量份,進而加入水從而得到固形分濃度66重量%的顏料塗覆液。使用該塗覆液與實施例1以相同之方式來製造具有1層的顏料塗覆層的印刷用塗覆紙並進行評估。[Comparative Example 2] 100 parts by weight of a heavy calcium carbonate (made by Imerys, trade name: C97, D50 = 0.91 μm) as a pigment, 7.6 parts by weight of a styrene-butadiene-based copolymer latex as an adhesive, Oxidized starch was 6 parts by weight, and water was further added to obtain a pigment coating solution having a solid content concentration of 66% by weight. Using this coating liquid, a coated paper for printing having a pigment coating layer of 1 layer was produced and evaluated in the same manner as in Example 1.

[比較例3]   調配作為顏料之重質碳酸鈣(Fimatec股份有限公司製,商品名:FMT97,D50=0.88μm)55重量份、高嶺土(Imerys公司製,商品名:KCS,D50=4.05μm)45重量份、作為接著劑之苯乙烯・丁二烯系共聚合乳膠4重量份、氧化澱粉6重量份,進而加入水從而得到固形分濃度66重量%的顏料塗覆液。使用該塗覆液與實施例1以相同之方式來製造具有1層的顏料塗覆層的印刷用塗覆紙並進行評估。[Comparative Example 3] 55 parts by weight of heavy calcium carbonate (manufactured by Fimatec Co., Ltd., trade name: FMT97, D50 = 0.88 μm), kaolin (manufactured by Imerys Co., Ltd., trade name: KCS, D50 = 4.05 μm) as a pigment 45 parts by weight, 4 parts by weight of a styrene-butadiene-based copolymer latex as an adhesive, and 6 parts by weight of oxidized starch, and water was added to obtain a pigment coating solution having a solid content concentration of 66% by weight. Using this coating liquid, a coated paper for printing having a pigment coating layer of 1 layer was produced and evaluated in the same manner as in Example 1.

[比較例4]   調配作為顏料之重質碳酸鈣(Fimatec股份有限公司製,商品名:FMT97,D50=0.88μm)55重量份及微粒重質碳酸鈣(Fimatec股份有限公司製,商品名:FMT100YF,D50=0.60μm)45重量份、作為接著劑之苯乙烯・丁二烯系共聚合乳膠4重量份、氧化澱粉6重量份,進而加入水從而得到固形分濃度66重量%的顏料塗覆液。使用該塗覆液與實施例1以相同之方式來製造具有1層的顏料塗覆層的印刷用塗覆紙並進行評估。[Comparative Example 4] 55 parts by weight of heavy calcium carbonate (made by Fimatec Co., Ltd., trade name: FMT97, D50 = 0.88 μm) and fine ground calcium carbonate (made by Fimatec Co., Ltd., trade name: FMT100YF) were prepared as pigments. (D50 = 0.60 μm) 45 parts by weight, 4 parts by weight of styrene-butadiene copolymer latex and 6 parts by weight of oxidized starch as an adhesive, and then water was added to obtain a pigment coating solution having a solid concentration of 66% by weight. . Using this coating liquid, a coated paper for printing having a pigment coating layer of 1 layer was produced and evaluated in the same manner as in Example 1.

可明確得知本發明的印刷用塗覆紙的油墨乾燥性與印刷光澤度的均衡為優異。It became clear that the balance of the ink dryness and printing glossiness of the coated paper for printing of this invention is excellent.

Claims (6)

一種印刷用塗覆紙,其係在原紙的至少單面上具備有2層以上的顏料塗覆層,最外的顏料塗層包含具有0.80μm以下的平均粒徑(D50)的碳酸鈣。A coated paper for printing is provided with at least one side of a base paper with two or more pigment coating layers, and an outermost pigment coating layer includes calcium carbonate having an average particle diameter (D50) of 0.80 μm or less. 如請求項1之印刷用塗覆紙,其中,在前述最外的顏料塗覆層的顏料100重量份中,包含前述碳酸鈣40重量份以上。The coated paper for printing according to claim 1, wherein the 100 parts by weight of the pigment of the outermost pigment coating layer includes 40 parts by weight or more of the calcium carbonate. 如請求項1或2之印刷用塗覆紙,其中,前述碳酸鈣的平均粒徑(D50)為0.50~0.75μm。The coated paper for printing according to claim 1 or 2, wherein the average particle diameter (D50) of the calcium carbonate is 0.50 to 0.75 μm. 如請求項1~3中任一項之印刷用塗覆紙,其中,白紙光澤度為40%以下,藍紅印刷部分的印刷光澤度為58~75%。The coated paper for printing according to any one of claims 1 to 3, wherein the gloss of the white paper is 40% or less, and the gloss of the printing of the blue-red printed part is 58 to 75%. 如請求項2之印刷用塗覆紙,其中,在前述最外的顏料塗覆層的顏料100重量份中,包含前述碳酸鈣75重量份以上。The coated paper for printing as set forth in claim 2, wherein 75 parts by weight or more of the calcium carbonate is contained in 100 parts by weight of the pigment in the outermost pigment coating layer. 如請求項1~5中任一項之印刷用塗覆紙,其中,最外的顏料塗覆層的塗覆量係多於最內的顏料塗覆層的塗覆量。The coated paper for printing according to any one of claims 1 to 5, wherein the coating amount of the outermost pigment coating layer is more than the coating amount of the innermost pigment coating layer.
TW107120648A 2017-06-15 2018-06-15 Coated paper for printing TWI781183B (en)

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