JPH0825799A - Cast-coated sheet for ink jet recording - Google Patents

Cast-coated sheet for ink jet recording

Info

Publication number
JPH0825799A
JPH0825799A JP6186386A JP18638694A JPH0825799A JP H0825799 A JPH0825799 A JP H0825799A JP 6186386 A JP6186386 A JP 6186386A JP 18638694 A JP18638694 A JP 18638694A JP H0825799 A JPH0825799 A JP H0825799A
Authority
JP
Japan
Prior art keywords
paper
freeness
cast
coating
comparative example
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
Application number
JP6186386A
Other languages
Japanese (ja)
Other versions
JP2996876B2 (en
Inventor
Yoshihiro Kuroyama
良弘 黒山
Kazufumi Yamazaki
和文 山崎
Yuji Tokushige
裕二 徳重
Teruhisa Shimada
照久 島田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Paper Industries Co Ltd
Jujo Paper Co Ltd
Original Assignee
Nippon Paper Industries Co Ltd
Jujo Paper Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Paper Industries Co Ltd, Jujo Paper Co Ltd filed Critical Nippon Paper Industries Co Ltd
Priority to JP6186386A priority Critical patent/JP2996876B2/en
Publication of JPH0825799A publication Critical patent/JPH0825799A/en
Application granted granted Critical
Publication of JP2996876B2 publication Critical patent/JP2996876B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52Macromolecular coatings
    • B41M5/5218Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays

Landscapes

  • Paper (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)

Abstract

PURPOSE:To enhance the continuous operability by using a base sheet which has a specific weighing and freeness and in which loading material in the sheet has a specific relationship to the freeness in a cast-coated sheet formed by pressing a recording layer to a mirror finished surface heated while it is wet. CONSTITUTION:A cast-coated sheet for ink jet recording is formed by coating at least one side surface of a base sheet with a recording layer containing pigment having synthetic silica as a main ingredient and binder, pressing it to a mirror finished surface heated while the layer is in the wet state, and drying it. In this case, the sheet has weighing of 80-150g/m<2>, freeness of 290-450mI, and loading material in the sheet of 28-(freeness/20) <= loading material quantity (A%) <=32(freeness/20). Synthetic silica in the pigment is set to a range of 40-100wt.%. The BET coated surface area of the silica is 200-600m<2>/g.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は水性インクを用いて記録
するインクジェット記録用紙に関し、特に高い印字品位
と優れたインク吸収性を得ることができるのみならず、
連続操業性にも優れたインクジェット記録用キャストコ
ート紙に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording sheet for recording with an aqueous ink, and not only can obtain particularly high printing quality and excellent ink absorbability,
The present invention relates to an ink jet recording cast coated paper excellent in continuous operability.

【0002】[0002]

【従来技術】一般にインクジェット記録方式は、種々の
機構によりインクの小滴を吐出し、記録用紙上に付着さ
せることにより、ドットを形成し記録を行うものである
が、ドットインパクトタイプの記録方式に比べて騒音が
なく、またフルカラー化が容易である上、高速印字が可
能であるなどの利点がある。一方、インクジェット記録
に使用されるインクは、通常直接染料や酸性染料などを
用いた水性インクであるため乾燥性が悪いという欠点が
ある。
2. Description of the Related Art Generally, an ink jet recording method is a method of ejecting small ink droplets by various mechanisms and depositing them on a recording sheet to form dots for recording. Compared with this, there are advantages that there is no noise, that full color is easy, and high speed printing is possible. On the other hand, the ink used for ink jet recording is usually a water-based ink using a direct dye, an acid dye, or the like, and therefore has a drawback of poor drying property.

【0003】このようなインクジェット記録方式に用い
られるインクジェット記録用紙に対して要求される特性
としては、インク乾燥速度が速いこと、印字濃度が
高いこと、インクの溢れや滲みがないこと、更に、
インクを吸収することにより用紙が波打ちしないこと等
が挙げられる。これらの特性を満たした高画質のインク
ジェット記録用紙を、キャストコート法により製造する
方法は既に提案されている(特開昭62−95285
号、同63−264391号、特開平2−274587
号、同5−59694号各公報等)。
The characteristics required for the ink jet recording paper used in such an ink jet recording system are that the ink drying speed is high, the printing density is high, ink does not overflow or bleed, and further,
For example, the paper does not wavy due to absorption of ink. A method for producing a high quality ink jet recording paper satisfying these characteristics by a cast coating method has already been proposed (Japanese Patent Laid-Open No. 62-95285).
No. 63-264391, JP-A-2-274587.
Nos. 5-59694, etc.).

【0004】これらの製造方法は、合成シリカを主成分
とする顔料及び結着剤とからなる記録層を、未乾燥の湿
潤状態にあるうちに、加熱された鏡面仕上げ面に圧着し
て鏡面を写し取ると同時に乾燥させ、高光沢のキャスト
コート紙を得るものである。しかしながら、これらのキ
ャストコート紙における記録層の塗工量は、15〜30
g/m2 と高いので、塗工液中の水分量が極めて多量に
なり、従って、従来提案されている何れのキャストコー
ト製造法においても、塗工液中の多量の水分を塗工層側
から原紙を通して反対面側に抜き、蒸発乾燥させなけれ
ばならないために、生産性が極めて低いという欠点があ
った。
In these production methods, a recording layer composed of a pigment containing synthetic silica as a main component and a binder is pressed onto a heated mirror-finished surface while being in an undried wet state, so that the mirror surface is formed. It is copied and dried at the same time to obtain high-gloss cast coated paper. However, the coating amount of the recording layer in these cast coated papers is 15 to 30.
Since it is as high as g / m 2 , the amount of water in the coating liquid becomes extremely large. Therefore, in any of the conventionally proposed cast coat manufacturing methods, a large amount of water in the coating liquid is applied to the coating layer side. However, it has a drawback that the productivity is extremely low because it has to be pulled out through the base paper to the opposite side and evaporated to dryness.

【0005】更に、上記のキャストコート製造法は、下
記の〜の点で連続操業性に劣るという欠点があっ
た。 :加熱された鏡面仕上げ面に圧着した紙が、該鏡面仕
上げ面から剥離する際、鏡面仕上げ面のドラム上に塗工
層が僅かに残り、経時で、ドラム上に汚れが堆積するた
め、ついには鏡面を写し取ることができなくなると同時
に、紙と鏡面仕上げ面のドラムとの剥離が重くなって紙
切れを生じる。そのため、操業を停止して、鏡面仕上げ
面のドラムの汚れを除去しなければならない。
Further, the above-mentioned cast coat manufacturing method has the drawback that the continuous operability is poor in the following points (1) to (3). : When the paper pressed against the heated mirror-finished surface is peeled off from the mirror-finished surface, a slight coating layer remains on the mirror-finished surface of the drum, and dirt accumulates on the drum over time. Cannot copy the mirror surface, and at the same time, the separation between the paper and the drum on the mirror-finished surface becomes heavy, causing a paper break. Therefore, it is necessary to stop the operation and remove the dirt on the mirror-finished surface of the drum.

【0006】:一般に、紙と鏡面仕上げ面のドラムと
の剥離性の持続に効果のある油性物質として、植物性硬
化油、植物性硫酸化油、燐酸トリブチル、キシレン、テ
ルペン、モノクロルベンゼン等が用いられるが(紙パ技
協誌,24巻,617頁(1970))、比表面積の大
きな合成シリカを顔料の主成分とするインクジェット記
録用キャストコート紙の場合には、塗工層が多孔質であ
るため吸油性が大きく、塗工乾燥中に、通常のキャスト
コート紙に比べて遙に速くドラム面上の油膜を吸収する
ため、紙と鏡面仕上げ面のドラム間との剥離が重くな
り、連続操業性が極端に低下する。
Generally, as the oily substance effective for maintaining the releasability between the paper and the mirror-finished drum, vegetable hardened oil, vegetable sulfated oil, tributyl phosphate, xylene, terpene, monochlorobenzene, etc. are used. However, in the case of ink jet recording cast coated paper containing synthetic silica having a large specific surface area as a main component of the pigment, the coating layer is porous. Since it has a large oil absorption, it absorbs the oil film on the drum surface much faster than normal cast coated paper during coating and drying, resulting in heavy peeling between the paper and the mirror-finished surface between the drums. Operability is extremely reduced.

【0007】:一般にキャストコート紙の製造におい
ては、坪量が低下するにしたがって生産性が低下する。
即ち、ドラム面から紙が剥離する時には紙にこわさが必
要であるが、低坪量の紙ではこのこわさが小さいのでド
ラムからの剥離角が大きくなる。このために剥離抵抗が
大きくなり、塗工層がドラム面に取られ易くなるので、
連続操業性が低下する。
Generally, in the production of cast coated paper, the productivity decreases as the basis weight decreases.
That is, when the paper is peeled from the drum surface, the paper needs to be stiff. However, in the case of a paper having a low basis weight, the stiffness is small, so that the peeling angle from the drum becomes large. For this reason, the peeling resistance becomes large, and the coating layer is easily taken on the drum surface.
Continuous operability is reduced.

【0008】この現象は、インクジェット記録用キャス
トコート紙の場合、坪量が150g/m2 以下の場合に
比較的顕著となる。このため、従来は、紙中に添加する
顔料を減らすなど、少しでもこわさを上げる手段を講じ
ていたが、インクジェット適性の観点から、その手段に
は限度がある。即ち、原紙自体の吸水性が低い場合に
は、塗工後のインクジェット記録用キャストコート紙の
インク吸収性も低下する。従って、坪量が150g/m
2 以下の場合、記録性と連続操業性の両方に優れたイン
クジェット記録用キャストコート紙は未だ見い出されて
いない。
In the case of ink jet recording cast coated paper, this phenomenon becomes relatively remarkable when the basis weight is 150 g / m 2 or less. For this reason, conventionally, measures have been taken to increase the stiffness as much as possible, such as reducing the amount of pigment added to the paper, but from the viewpoint of inkjet suitability, there is a limit to this measure. That is, when the water absorbency of the base paper itself is low, the ink absorbency of the cast recording paper for inkjet recording after coating is also lowered. Therefore, the basis weight is 150 g / m
In the case of 2 or less, an inkjet recording cast coated paper excellent in both recording property and continuous operability has not been found yet.

【0009】[0009]

【発明が解決しようとする課題】本発明者等は、上記の
欠点を解決すべく鋭意検討した結果、特定の坪量と濾水
度を有すると共に、原紙の紙中填料量が、濾水度と特定
の関係の範囲にある原紙を使用することにより、インク
吸収性に優れると共に、製造時のドラム汚れが発生しに
くくなり、連続操業性が改善されることを見出し本発明
に到達した。従って、本発明の目的は、記録性と生産性
の両方に優れたインクジェット記録用キャストコート紙
を提供することにある。
DISCLOSURE OF THE INVENTION The inventors of the present invention have conducted diligent studies to solve the above-mentioned drawbacks, and as a result, have a specific basis weight and freeness, and the amount of filler in the paper of the base paper is The inventors have found that the use of a base paper having a range of a specific relationship with the above makes it possible to obtain excellent ink absorbency, to prevent the occurrence of stains on the drum during manufacturing, and to improve continuous operability. Therefore, an object of the present invention is to provide a cast coated paper for inkjet recording which is excellent in both recording property and productivity.

【0010】[0010]

【課題を解決するための手段】本発明の上記の目的は、
原紙の少なくとも一方の面に、合成シリカを主成分とす
る顔料及び結着剤とからなる記録層を塗布し、該記録層
が湿潤状態にあるうちに加熱された鏡面仕上げ面に圧着
し、乾燥させてなるインクジェット記録用キャストコー
ト紙において、該原紙の坪量が80〜150g/m2
あって、濾水度が290〜450mlであると共に、紙
中の填料量が、 28−(濾水度/20)≦填料量(%)≦32−(濾水
度/20) であることを特徴とする、インクジェット記録用キャス
トコート紙によって達成された。
SUMMARY OF THE INVENTION The above objects of the present invention are as follows.
A recording layer consisting of a pigment containing synthetic silica as a main component and a binder is applied to at least one surface of the base paper, and the recording layer is pressed against the heated mirror-finished surface while the recording layer is in a wet state and dried. In the cast-coated inkjet recording paper thus obtained, the basis weight of the base paper is 80 to 150 g / m 2 , the freeness is 290 to 450 ml, and the filler amount in the paper is 28- ( Degree / 20) ≦ amount of filler (%) ≦ 32− (freeness / 20), which is achieved by the cast coated paper for inkjet recording.

【0011】本発明において使用する原紙は、インクジ
ェット記録用キャストコート紙とした場合に、連続操業
性の点で問題のあった、坪量が80〜150g/m2
ものが対象となる。本発明の原紙の濾水度は290〜4
50mlであることが必要であるが、これは、濾水度が
450ml以上となると、紙力が下がり、連続操業性が
低下する、一方、濾水度が290ml以下では、塗工層
のインク吸収性が低下するからである。尚、本発明にお
いては、特に、320〜420mlの濾水度を有する原
紙が好ましい。
The base paper used in the present invention has a basis weight of 80 to 150 g / m 2 , which is a problem in terms of continuous operability when it is a cast coated paper for ink jet recording. The freeness of the base paper of the present invention is 290 to 4
It needs to be 50 ml, but when the freeness is 450 ml or more, the paper strength is reduced and the continuous operability is deteriorated. On the other hand, when the freeness is 290 ml or less, the ink absorption of the coating layer is reduced. This is because the sex is reduced. In the present invention, a base paper having a freeness of 320 to 420 ml is particularly preferable.

【0012】本発明において、紙中填料量が、28−
(濾水度/20)重量%以下では塗工層のインク吸収性
が低下し、また、32−(濾水度/20)重量%以上で
は紙力が下がり連続操業性が低下する。尚、紙中填料量
は、特に、29−(濾水度/20)重量%〜31−(濾
水度/20)重量%の範囲であることが好ましい。原紙
に用いられるパルプは、濾水度以外は特に限定されず、
L材及びN材の化学パルプ、機械パルプ、古紙パルプの
中から適宜選択して使用することができるが、特に化学
パルプを使用することが好ましい。また、これらのパル
プを混合して使用することもできる。混合した時の濾水
度は、混合後のパルプ全体の濾水度を意味する。
In the present invention, the amount of filler in paper is 28-
If the freeness is 20% by weight or less, the ink absorbency of the coating layer is lowered, and if it is 32- (freeness / 20)% by weight or more, the paper strength is lowered and the continuous operability is lowered. The amount of the filler in the paper is particularly preferably in the range of 29- (freeness / 20)% by weight to 31- (freeness / 20)% by weight. The pulp used for the base paper is not particularly limited except the freeness,
The chemical pulp, the mechanical pulp, and the waste paper pulp of L material and N material can be appropriately selected and used, but it is particularly preferable to use the chemical pulp. Moreover, these pulps can also be mixed and used. The freeness when mixed means the freeness of the whole pulp after mixing.

【0013】原紙に用いられる填料は、例えばカオリ
ン、タルク、炭酸カルシウム、二酸化チタン等の、通常
抄紙に使用されるものの中から適宜選択して用いること
ができる。本発明で記録層に使用することのできる顔料
の主成分である合成シリカとは、一般に非晶質シリカ、
無定形シリカ、微粉シリカであるが、特に、BET比表
面積が200〜600m2 /gのものであることが好ま
しい。BET比表面積が200m2 /g未満ではインク
吸収性が低下したり、逆に600m2 /gより大きいと
連続操業性が低下することがある。合成シリカの顔料中
に占める割合は、40〜100重量%である。合成シリ
カと併用できる顔料としては、例えばカオリン、タル
ク、炭酸カルシウム、二酸化チタン、クレー、酸化亜
鉛、水酸化アルミニウム、アルミナ等が挙げられる。
The filler used for the base paper can be appropriately selected and used from those usually used for papermaking such as kaolin, talc, calcium carbonate, titanium dioxide and the like. The synthetic silica, which is the main component of the pigment that can be used in the recording layer in the present invention, is generally amorphous silica,
The amorphous silica and the finely divided silica are preferably those having a BET specific surface area of 200 to 600 m 2 / g. If the BET specific surface area is less than 200 m 2 / g, the ink absorptivity may decrease, and conversely, if it exceeds 600 m 2 / g, continuous operability may decrease. The proportion of synthetic silica in the pigment is 40 to 100% by weight. Examples of pigments that can be used in combination with the synthetic silica include kaolin, talc, calcium carbonate, titanium dioxide, clay, zinc oxide, aluminum hydroxide, alumina and the like.

【0014】また、記録層に使用される結着剤として
は、酸化澱粉、エステル化澱粉等の澱粉類、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等のセ
ルロース誘導体、ポリビニルアルコール及びその誘導
体、ポリビニルピロリドン、カゼイン、ゼラチン、大豆
タンパク、スチレン−アクリル樹脂及びその誘導体、ス
チレン−ブタジエンラテックス、アクリルエマルジョ
ン、酢酸ビニルエマルジョン等が挙げられる。この結着
剤の配合量は、シリカ100重量部に対して、10重量
部から100重量部であることが好ましい。即ち、シリ
カの比表面積に応じて、結着剤の配合量の最適値は上記
の範囲で変化するが、原則として、シリカの結着が十分
であり、かつインク吸収性が阻害されない範囲の量であ
る限り、特に限定されるものではない。
The binder used in the recording layer includes starches such as oxidized starch and esterified starch, cellulose derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose, polyvinyl alcohol and its derivatives, polyvinylpyrrolidone, casein and gelatin. , Soy protein, styrene-acrylic resin and its derivatives, styrene-butadiene latex, acrylic emulsion, vinyl acetate emulsion and the like. The compounding amount of the binder is preferably 10 parts by weight to 100 parts by weight with respect to 100 parts by weight of silica. That is, depending on the specific surface area of silica, the optimum value of the amount of the binder mixed varies within the above range, but in principle, the amount of silica is sufficient and the ink absorbency is not hindered. As long as it is, it is not particularly limited.

【0015】本発明における上記のシリカ及び結着剤
は、通常、水系塗工液として調製される。この塗工液に
は、必要に応じて顔料分散剤、保水剤、増粘剤、消泡
剤、防腐剤、着色剤、耐水化剤、湿潤剤、蛍光染料、紫
外線吸収剤、カチオン性高分子電解質等を適宜添加する
ことができる。塗工方式としては、ブレードコーター、
エアナイフコーター、ロールコーター、ブラッシュコー
ター、キスコーター、スクイズコーター、カーテンコー
ター、バーコーター、グラビアコーター、コンマコータ
ー等の公知の塗工機を用いた塗工方法の中から適宜選択
して使用することができる。
The above silica and binder in the present invention are usually prepared as an aqueous coating liquid. This coating liquid contains a pigment dispersant, a water retention agent, a thickener, an antifoaming agent, an antiseptic, a colorant, a water-proofing agent, a wetting agent, a fluorescent dye, an ultraviolet absorber, a cationic polymer, if necessary. An electrolyte or the like can be added as appropriate. As a coating method, a blade coater,
It can be appropriately selected and used from coating methods using known coating machines such as an air knife coater, a roll coater, a brush coater, a kiss coater, a squeeze coater, a curtain coater, a bar coater, a gravure coater, and a comma coater. .

【0016】記録層の塗工量は、原紙の表面を覆い、か
つ十分なインク吸収性が得られる範囲で任意に調整する
ことができるが、片面当たり、固形分換算で5〜30g
/m2 であることが好ましく、特に、10〜25g/m
2 であることが好ましい。本発明における、塗工された
インクジェット記録層の乾燥は、記録層が未だ湿潤状態
にあるうちに、加熱された鏡面仕上げ面に圧着して行う
が、塗工層の湿潤状態には、塗工直後の未乾燥の状態、
及び凝固法を用いて塗工後の未乾燥時にゲル化させた状
態のみならず、塗工乾燥後に再湿潤液により可塑化させ
た状態も含まれる。
The coating amount of the recording layer can be arbitrarily adjusted within a range that covers the surface of the base paper and obtains sufficient ink absorbency, but is 5 to 30 g per one surface in terms of solid content.
/ M 2 is preferred, especially 10-25 g / m
It is preferably 2 . Drying of the coated ink jet recording layer in the present invention is performed by pressing the heated mirror-finished surface while the recording layer is still in a wet state. Immediately after undried state,
And not only the state of being gelled when not dried after coating using the coagulation method, but also the state of being plasticized with a rewetting liquid after coating drying.

【0017】本発明においては、特に、未乾燥時にゲル
化させた状態で、加熱された鏡面仕上げ面に圧着するこ
とが好ましい。この場合の凝固法における凝固液に用い
る凝固剤としては、例えば、蟻酸、酢酸、クエン酸、酒
石酸、乳酸、塩酸、硫酸等の、カルシウム、亜鉛、バリ
ウム、鉛、マグネシウム、カドミウム、アルミニウム等
との各種の塩や、硫酸カリウム、クエン酸カリウム、硼
砂、硼酸等を使用することが一般的であるが、本発明に
おいては、特に蟻酸塩を使用することが好ましい。本発
明で用いる加熱した鏡面仕上げ面とは、通常100℃程
度に加熱された、鏡面加工された円筒外面を有するドラ
ムである。
In the present invention, it is particularly preferable to press-bond to a heated mirror-finished surface in a gelled state when not dried. Examples of the coagulant used in the coagulation liquid in this case include formic acid, acetic acid, citric acid, tartaric acid, lactic acid, hydrochloric acid, sulfuric acid, calcium, zinc, barium, lead, magnesium, cadmium, aluminum, etc. Although various salts, potassium sulfate, potassium citrate, borax, boric acid, etc. are generally used, in the present invention, it is particularly preferable to use formate. The heated mirror-finished surface used in the present invention is a drum having a mirror-finished cylindrical outer surface which is usually heated to about 100 ° C.

【0018】[0018]

【発明の効果】本発明のインクジェット記録用キャスト
コート紙は、高い印字品位と優れたインク吸収性を実現
することができるのみならず、従来問題であった、製造
時の連続操業性をも改善することができるので、生産性
にも優れている。
INDUSTRIAL APPLICABILITY The cast coated paper for ink jet recording of the present invention not only realizes high printing quality and excellent ink absorbency, but also improves continuous operability at the time of production, which has been a problem in the past. Therefore, it is also excellent in productivity.

【0019】[0019]

【実施例】以下、本発明を実施例によって更に詳述する
が、本発明はこれによって限定されるものではない。
又、特に断らない限り、以下に記載する部及び%は、そ
れぞれ重量部及び重量%を示す。
EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.
Further, unless otherwise specified, the parts and% described below represent parts by weight and% by weight, respectively.

【0020】尚、実施例及び比較例で行った試験、測定
方法及び評価基準は次の通りである。 (1)インク吸収性 カラーインクジェットプリンター(IO−725:シャ
ープ株式会社製の商品名)を用いて黒ベタを記録し、下
記の基準によって目視評価した。 1.記録後のインクが吸収される時間が3秒未満である
もの・・・・・・○ 2.記録後のインクが吸収される時間が3秒以上である
もの・・・・・・×
The tests, measuring methods and evaluation criteria conducted in the examples and comparative examples are as follows. (1) Ink absorbency Black solid was recorded using a color inkjet printer (IO-725: trade name of Sharp Corporation), and visually evaluated according to the following criteria. 1. The ink absorption time after recording is less than 3 seconds ... It takes 3 seconds or more for the ink to be absorbed after recording ...

【0021】(2)連続操業性 比較例12を基準の1.0とした時、連続操業時間(塗
工長)を相対比較で評価した。数字は大きいほど連続操
業性に優れていることを示し、1.4以上で連続操業性
の効果が明らかである。また、実施例及び比較例で使用
した塗工液A〜C及び凝固液は、下記の様にして調製し
た。
(2) Continuous operability When the comparative example 12 was set to 1.0 as a standard, the continuous operability (coating length) was evaluated by relative comparison. The larger the number is, the better the continuous operability is, and the effect of the continuous operability is clear at 1.4 or more. Further, the coating liquids A to C and the coagulating liquid used in Examples and Comparative Examples were prepared as follows.

【0022】塗工液Aの調製 顔料として、BET比表面積390m2 /gの合成シリ
カ(ミズカシルP−78F:水澤化学工業社製の商品
名)100部、結着剤としてポリビニルアルコール(P
VA117:クラレ株式会社製の商品名)25部及びカ
ゼイン(ラクチックカゼイン:ニュージーランド産の商
品名)25部、離型剤としてステアリン酸カルシウム
(ノプコートC−104:サンノプコ株式会社製の商品
名)2部の固形分組成からなる、濃度30%の水性塗工
液Aを調製した。
100 parts of synthetic silica having a BET specific surface area of 390 m 2 / g (Mizukasil P-78F: trade name of Mizusawa Chemical Industry Co., Ltd.) was used as a pigment for preparing the coating liquid A, and polyvinyl alcohol (P was used as a binder.
VA117: 25 parts of Kuraray Co., Ltd.) and 25 parts of casein (lactic casein: New Zealand product name), 2 parts of calcium stearate (Nopcoat C-104: San Nopco product name) as a release agent An aqueous coating liquid A having a solid content composition of 30% and a concentration of 30% was prepared.

【0023】塗工液Bの調製 顔料として、BET比表面積600m2 /gの合成シリ
カ(サイロイド600:富士デヴィソン株式会社製の商
品名)45部及び軽質炭酸カルシウム(タマパール12
1:奥多摩工業株式会社製の商品名)55部、結着剤と
してスチレンブタジエンラバー(JSR−0801:日
本合成ゴム株式会社製の商品名)15部、ポリビニルア
ルコール(PVA117)20部、カゼイン20部、離
型剤としてステアリン酸カルシウム(ノプコートC−1
04)2部の固形分組成からなる、濃度30%の水性塗
工液Bを調製した。
As a pigment for preparing the coating liquid B, 45 parts of synthetic silica having a BET specific surface area of 600 m 2 / g (Syloid 600: trade name of Fuji Davis Co., Ltd.) and light calcium carbonate (Tamapearl 12)
1: 50 parts of Okutama Kogyo Co., Ltd.), 15 parts of styrene-butadiene rubber (JSR-0801: trade name of Japan Synthetic Rubber Co., Ltd.) as a binder, 20 parts of polyvinyl alcohol (PVA117), 20 parts of casein , Calcium stearate as a release agent (Nopcoat C-1
04) An aqueous coating liquid B having a concentration of 30% and having a solid content of 2 parts was prepared.

【0024】塗工液Cの調製 顔料として、BET比表面積240m2 /gの合成シリ
カ(ミズカシルP−802:水澤化学工業株式会社製の
商品名)100部、結着剤としてスチレンブタジエンラ
バー(JSR−0801)25部及びカゼイン25部、
離型剤としてステアリン酸カルシウム(ノプコートC−
104)2部の固形分組成からなる、濃度30%の水性
塗工液Cを調製した。凝固液の調製 凝固剤として蟻酸カルシウム10%、耐水化剤としてポ
リエチレンイミン第4級アンモニウム塩を3%含有する
凝固液を調製した。
100 parts of synthetic silica having a BET specific surface area of 240 m 2 / g (Mizukasil P-802: trade name of Mizusawa Chemical Industry Co., Ltd.) was used as a pigment for preparing the coating liquid C, and styrene-butadiene rubber (JSR was used as a binder). -0801) 25 parts and 25 parts of casein,
Calcium stearate (Nopcoat C-
104) An aqueous coating solution C having a concentration of 30% and having a solid content of 2 parts was prepared. Preparation of Coagulating Liquid A coagulating liquid containing 10% of calcium formate as a coagulating agent and 3% of polyethyleneimine quaternary ammonium salt as a waterproofing agent was prepared.

【0025】実施例1及び比較例1並びに比較例2.濾
水度310mlのLBKP、及び軽質炭酸カルシウム
を、83/17(実施例1)及び86/14(比較例
1)並びに80/20(比較例2)(いずれも重量部)
の各配合比で配合し、サイズ剤(アルキルケテンダイマ
ー)0.05部、カチオン化澱粉1.0部、紙力増強剤
0.2部、歩留向上剤0.05部からなる抄紙原料を
0.03%の濃度に調製し、長網多筒式抄紙機にて抄紙
した。次いで、サイズプレス塗工により、澱粉を固形分
で2g/m2 塗工し、坪量109g/m2 の上質紙を得
た。顔料の塗布量を灰分の測定により求めたところ、実
施例1の場合が14.0%、比較例1の場合が11.5
%であり、比較例2の場合が17.0%であった。
Example 1 and Comparative Example 1 and Comparative Example 2. LBKP having a freeness of 310 ml and light calcium carbonate were added to 83/17 (Example 1) and 86/14 (Comparative Example 1) and 80/20 (Comparative Example 2) (parts by weight).
Each of the above compounding ratios was used to prepare a papermaking raw material comprising 0.05 parts of a sizing agent (alkyl ketene dimer), 1.0 part of cationized starch, 0.2 part of paper strength enhancer, and 0.05 part of retention improver. The concentration was adjusted to 0.03%, and the paper was made with a Fourdrinier cylinder type paper machine. Then, by a size press coating, the starch was coated in a solid content of 2 g / m 2 to obtain a woodfree paper having a basis weight of 109 g / m 2 . The amount of pigment applied was determined by measuring the ash content, and it was 14.0% in the case of Example 1 and 11.5% in the case of Comparative Example 1.
%, And in the case of Comparative Example 2 was 17.0%.

【0026】これらの原紙に、ロールコーターを用い、
塗工液Aを目標塗工量14g/m2として塗工した後、
凝固液をロールコーターで塗工して凝固処理を行い、塗
工層が湿潤状態にあるうちに、100℃に加熱されたキ
ャストドラムの鏡面に圧着して乾燥し、インクジェット
記録用キャストコート紙を製造した。
A roll coater is used for these base papers,
After coating the coating liquid A with a target coating amount of 14 g / m 2 ,
The coagulation liquid is applied by a roll coater for coagulation treatment, and while the coating layer is in a wet state, it is pressure-bonded to the mirror surface of the cast drum heated to 100 ° C. and dried to obtain a cast coated paper for inkjet recording. Manufactured.

【0027】比較例3及び比較例4.濾水度270ml
のLBKP、及び軽質炭酸カルシウムを、83/17
(比較例3)及び80/20(比較例4)(いずれも重
量部)の各配合比で配合した他は、実施例1と全く同様
にして長網多筒式抄紙機にて抄紙し、サイズプレス塗工
を経て、坪量109g/m2 の上質紙を得た。顔料の塗
布量を灰分の測定により求めたところ、比較例3の場合
が14.0%であり、比較例4の場合が17.0%であ
った。更に、これらの原紙に塗工液Aを実施例1と同様
に塗工、凝固処理した後、圧着乾燥し、インクジェット
記録用キャストコート紙を製造した。
Comparative Example 3 and Comparative Example 4. Freeness 270 ml
LBKP and light calcium carbonate, 83/17
(Comparative Example 3) and 80/20 (Comparative Example 4) (all in parts by weight), except that the components were mixed in the same manner as in Example 1, papermaking was carried out using a Fourdrinier multi-cylinder paper machine, After the size press coating, a high-quality paper having a basis weight of 109 g / m 2 was obtained. When the coating amount of the pigment was determined by measuring the ash content, it was 14.0% in the case of Comparative Example 3 and 17.0% in the case of Comparative Example 4. Further, coating liquid A was applied to these base papers in the same manner as in Example 1, coagulated, and then pressure-bonded and dried to produce cast coated papers for inkjet recording.

【0028】実施例2及び実施例3、比較例5並びに比
較例6.濾水度350mlのLBKP、及び軽質炭酸カ
ルシウムを、86/14(実施例2)及び83/17
(実施例3)、89/11(比較例5)並びに80/2
0(比較例6)(いずれも重量部)の各配合比で配合し
た他は、実施例1と全く同様にして長網多筒式抄紙機に
て抄紙し、サイズプレス塗工を経て、坪量109g/m
2 の上質紙を得た。顔料の塗布量を灰分の測定により求
めたところ、実施例2の場合が11.5%及び実施例3
の場合が14.0%、比較例5の場合が9.0%並びに
比較例6の場合が17.0%であった。更に、これらの
原紙に塗工液Aを実施例1と同様に塗工、凝固処理した
後、圧着乾燥し、インクジェット記録用キャストコート
紙を製造した。
Example 2 and Example 3, Comparative Example 5 and Comparative Example 6. LBKP having a freeness of 350 ml and light calcium carbonate were added to 86/14 (Example 2) and 83/17.
(Example 3), 89/11 (Comparative Example 5) and 80/2
0 (Comparative Example 6) (all in parts by weight), except that each was mixed in the same mixing ratio as in Example 1, papermaking was performed using a Fourdrinier cylinder paper machine, size press coating was performed, and Amount 109g / m
I got 2 fine paper. The amount of pigment applied was determined by measuring the ash content, and it was 11.5% in the case of Example 2 and Example 3
In the case of Comparative Example 5 was 9.0%, and in the case of Comparative Example 6 was 17.0%. Further, coating liquid A was applied to these base papers in the same manner as in Example 1, coagulated, and then pressure-bonded and dried to produce cast coated papers for inkjet recording.

【0029】実施例4及び実施例5、比較例7並びに比
較例8.濾水度390mlのLBKP、及び軽質炭酸カ
ルシウムを、89/11(実施例4)及び86/14
(実施例5)、93/7(比較例7)並びに83/17
(比較例8)(いずれも重量部)の各配合比で配合した
他は、実施例1と全く同様にして長網多筒式抄紙機にて
抄紙し、サイズプレス塗工を経て、坪量109g/m2
の上質紙を得た。顔料の塗布量を灰分の測定により求め
たところ、実施例4の場合が9.0%、実施例5の場合
が11.5%、比較例7の場合が6.0%並びに比較例
8の場合が14.0%であった。更に、これらの原紙に
塗工液Aを実施例1と同様に塗工、凝固処理した後、圧
着乾燥し、インクジェット記録用キャストコート紙を製
造した。
Example 4 and Example 5, Comparative Example 7 and Comparative Example 8. LBKP with a freeness of 390 ml and light calcium carbonate were added to 89/11 (Example 4) and 86/14.
(Example 5), 93/7 (Comparative Example 7) and 83/17
(Comparative Example 8) Paper was made in a fourdrinier multi-cylinder paper machine in exactly the same manner as in Example 1 except that the respective mixing ratios (all parts by weight) were used, followed by size press coating, and basis weight. 109 g / m 2
I got high quality paper. The coating amount of the pigment was determined by measuring the ash content. As a result, it was 9.0% in the case of Example 4, 11.5% in the case of Example 5, 6.0% in the case of Comparative example 7, and Comparative example 8. The case was 14.0%. Further, coating liquid A was applied to these base papers in the same manner as in Example 1, coagulated, and then pressure-bonded and dried to produce cast coated papers for inkjet recording.

【0030】実施例6及び比較例9並びに比較例10.
濾水度430mlのLBKP、及び軽質炭酸カルシウム
を、89/11(実施例6)及び93/7(比較例9)
並びに86/14(比較例10)(いずれも重量部)の
各配合比で配合した他は、実施例1と全く同様にして長
網多筒式抄紙機にて抄紙し、サイズプレス塗工を経て、
坪量109g/m2 の上質紙を得た。顔料の塗布量を灰
分の測定により求めたところ、実施例6の場合が9.0
%、比較例9の場合が6.0%並びに比較例10の場合
が11.5%であった。更に、これらの原紙に塗工液A
を実施例1と同様に塗工、凝固処理した後、圧着乾燥
し、インクジェット記録用キャストコート紙を製造し
た。
Example 6 and Comparative Example 9 and Comparative Example 10.
LBKP having a freeness of 430 ml and light calcium carbonate were added to 89/11 (Example 6) and 93/7 (Comparative Example 9).
And 86/14 (Comparative Example 10) (all in parts by weight), except that the components were compounded in the same manner as in Example 1 using a Fourdrinier cylinder paper machine to perform size press coating. Through,
A high-quality paper having a basis weight of 109 g / m 2 was obtained. When the coating amount of the pigment was determined by measuring the ash content, it was 9.0 in Example 6.
%, 6.0% for Comparative Example 9 and 11.5% for Comparative Example 10. Furthermore, coating liquid A is applied to these base papers.
Was coated and coagulated in the same manner as in Example 1 and then pressure-bonded and dried to produce a cast coated paper for inkjet recording.

【0031】比較例11及び比較例12.濾水度470
mlのLBKP、及び軽質炭酸カルシウムを、93/7
(比較例11)及び89/11(比較例12)(いずれ
も重量部)の各配合比で配合した他は実施例1と全く同
様にして長網多筒式抄紙機にて抄紙し、サイズプレス塗
工を経て、坪量109g/m2 の上質紙を得た。顔料の
塗布量を灰分の測定により求めたところ、比較例11の
場合が6.0%及び比較例12の場合が9.0%であっ
た。更に、これらの原紙に塗工液Aを実施例1と同様に
塗工、凝固処理した後、圧着乾燥し、インクジェット記
録用キャストコート紙を製造した。
Comparative Example 11 and Comparative Example 12. Freeness 470
Add 93 ml of LBKP and light calcium carbonate to 93/7
(Comparative Example 11) and 89/11 (Comparative Example 12) (both parts by weight) were mixed in the same manner as in Example 1, except that the paper was made in a fourdrinier multi-cylinder paper machine. After press coating, a high-quality paper having a basis weight of 109 g / m 2 was obtained. When the coating amount of the pigment was obtained by measuring the ash content, it was 6.0% in the case of Comparative Example 11 and 9.0% in the case of Comparative Example 12. Further, coating liquid A was applied to these base papers in the same manner as in Example 1, coagulated, and then pressure-bonded and dried to produce cast coated papers for inkjet recording.

【0032】実施例7.濾水度350mlのLBKP、
及び軽質炭酸カルシウムを83/17(重量部)の配合
比で配合した他は、実施例1と全く同様にして長網多筒
式抄紙機にて抄紙し、サイズプレス塗工を経て、坪量8
9g/m2 の上質紙を得た。顔料の塗布量を灰分の測定
により求めたところ、14.0%であった。更に、これ
らの原紙に塗工液Bを実施例1と同様に塗工、凝固処理
した後、圧着乾燥し、塗工量13.5g/m2 のインク
ジェット記録用キャストコート紙を製造した。
Example 7. LBKP with a freeness of 350 ml,
And light calcium carbonate at a compounding ratio of 83/17 (parts by weight), papermaking was performed by a Fourdrinier multi-cylinder paper machine in exactly the same manner as in Example 1, size press coating was carried out, and the basis weight was 8
A high-quality paper of 9 g / m 2 was obtained. The coating amount of the pigment was determined by measuring the ash content and found to be 14.0%. Further, coating liquid B was coated on these base papers in the same manner as in Example 1, coagulated, and then pressure-bonded and dried to produce cast-coated inkjet recording paper having a coating amount of 13.5 g / m 2 .

【0033】実施例8.濾水度430mlのLBKP、
及び軽質炭酸カルシウムを89/11(重量部)の配合
比で配合した他は、実施例1と全く同様にして長網多筒
式抄紙機にて抄紙し、サイズプレス塗工を経て、坪量1
39g/m2 の上質紙を得た。顔料の塗布量を灰分の測
定により求めたところ、9.0%であった。更に、これ
らの原紙に塗工液Cを実施例1と同様に塗工、凝固処理
した後、圧着乾燥し、塗工量14.3g/m2 のインク
ジェット記録用キャストコート紙を製造した。
Example 8. LBKP with a freeness of 430 ml,
And light calcium carbonate at a compounding ratio of 89/11 (parts by weight), papermaking was performed by a Fourdrinier cylinder paper machine in exactly the same manner as in Example 1, size press coating was performed, and the basis weight was 1
39 g / m 2 of high quality paper was obtained. The amount of the pigment applied was 9.0% as determined by measuring the ash content. Further, the coating liquid C was applied to these base papers in the same manner as in Example 1, coagulated, and then pressure-bonded and dried to produce cast-coated inkjet recording paper having a coating amount of 14.3 g / m 2 .

【0034】実施例1〜8及び比較例1〜12における
製造時のそれぞれの連続操業性及びインクジェット記録
用キャストコート紙のインク吸収性は表1に示した通り
である。
The continuous operability at the time of production and the ink absorbency of the ink jet recording cast coated paper in Examples 1 to 8 and Comparative Examples 1 to 12 are as shown in Table 1.

【表1】 以上の結果は本発明の有効性を実証するものである。
尚、連続操業性が1.4未満の場合を×、1.4以上の
場合を○として、表1の結果を綜合評価した結果を図1
に示す。
[Table 1] The above results demonstrate the effectiveness of the present invention.
In addition, the result of comprehensive evaluation of the results in Table 1 is shown in FIG.
Shown in

【図面の簡単な説明】[Brief description of drawings]

【図1】実施例、比較例を、濾水度と填料量に対して綜
合評価した図である。
FIG. 1 is a diagram showing a comprehensive evaluation of freeness and filler amount in Examples and Comparative Examples.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 島田 照久 東京都新宿区上落合1−30−6 日本製紙 株式会社商品開発研究所内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Teruhisa Shimada 1-30-6 Kamiochiai, Shinjuku-ku, Tokyo Inside Nippon Paper Industries Co., Ltd. Product Development Laboratory

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 原紙の少なくとも一方の面に、合成シリ
カを主成分とする顔料及び結着剤とからなる記録層を塗
布し、該記録層が湿潤状態にあるうちに加熱された鏡面
仕上げ面に圧着し、乾燥させてなるインクジェット記録
用キャストコート紙において、該原紙の坪量が80〜1
50g/m2 であって、濾水度が290〜450mlで
あると共に、紙中の填料量が、 28−(濾水度/20)≦填料量(%)≦32−(濾水
度/20) であることを特徴とする、インクジェット記録用キャス
トコート紙。
1. A mirror-finished surface which is heated while at least one surface of a base paper is coated with a pigment containing a synthetic silica as a main component and a binder and which is heated in a wet state. In a cast-coated paper for inkjet recording, which is pressure-bonded to and dried, the basis weight of the base paper is 80 to 1
50 g / m 2 and a freeness of 290 to 450 ml, and the amount of filler in the paper is 28- (freeness / 20) ≦ filler amount (%) ≦ 32− (freeness / 20 ) Is a cast-coated paper for inkjet recording.
【請求項2】 顔料中の合成シリカが40〜100重量
%である、請求項1に記載されたインクジェット記録用
キャストコート紙。
2. The cast coated paper for ink jet recording according to claim 1, wherein the synthetic silica in the pigment is 40 to 100% by weight.
【請求項3】 合成シリカのBET比表面積が200〜
600m2 /gである、請求項1又は2に記載されたイ
ンクジェット記録用キャストコート紙。
3. The BET specific surface area of the synthetic silica is 200 to.
The cast coated paper for inkjet recording according to claim 1 or 2, which has a viscosity of 600 m 2 / g.
JP6186386A 1994-07-15 1994-07-15 Cast coated paper for inkjet recording Expired - Fee Related JP2996876B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6186386A JP2996876B2 (en) 1994-07-15 1994-07-15 Cast coated paper for inkjet recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6186386A JP2996876B2 (en) 1994-07-15 1994-07-15 Cast coated paper for inkjet recording

Publications (2)

Publication Number Publication Date
JPH0825799A true JPH0825799A (en) 1996-01-30
JP2996876B2 JP2996876B2 (en) 2000-01-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2996876B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0796947A1 (en) * 1996-03-22 1997-09-24 Nippon Paper Industries Co., Ltd. Cast-coated paper and production method thereof
EP0806300A2 (en) * 1996-05-10 1997-11-12 Nippon Paper Industries Co., Ltd. Ink jet recording paper
JP2002194697A (en) * 2000-12-19 2002-07-10 Nippon Paper Industries Co Ltd Cast coated paper

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6129582A (en) * 1984-07-21 1986-02-10 Mitsubishi Paper Mills Ltd Ink jet recording medium
JPS6295285A (en) * 1985-10-23 1987-05-01 Sanyo Kokusaku Pulp Co Ltd Ink jet recording paper
JPS63317380A (en) * 1987-06-22 1988-12-26 Canon Inc Material to be recorded
JPH01160676A (en) * 1987-12-18 1989-06-23 Canon Inc Material to be recorded and recording method using said material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6129582A (en) * 1984-07-21 1986-02-10 Mitsubishi Paper Mills Ltd Ink jet recording medium
JPS6295285A (en) * 1985-10-23 1987-05-01 Sanyo Kokusaku Pulp Co Ltd Ink jet recording paper
JPS63317380A (en) * 1987-06-22 1988-12-26 Canon Inc Material to be recorded
JPH01160676A (en) * 1987-12-18 1989-06-23 Canon Inc Material to be recorded and recording method using said material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0796947A1 (en) * 1996-03-22 1997-09-24 Nippon Paper Industries Co., Ltd. Cast-coated paper and production method thereof
EP0806300A2 (en) * 1996-05-10 1997-11-12 Nippon Paper Industries Co., Ltd. Ink jet recording paper
EP0806300A3 (en) * 1996-05-10 1998-01-07 Nippon Paper Industries Co., Ltd. Ink jet recording paper
JP2002194697A (en) * 2000-12-19 2002-07-10 Nippon Paper Industries Co Ltd Cast coated paper

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