JPH09291496A - Coated paper for offset rotary printing - Google Patents

Coated paper for offset rotary printing

Info

Publication number
JPH09291496A
JPH09291496A JP10501596A JP10501596A JPH09291496A JP H09291496 A JPH09291496 A JP H09291496A JP 10501596 A JP10501596 A JP 10501596A JP 10501596 A JP10501596 A JP 10501596A JP H09291496 A JPH09291496 A JP H09291496A
Authority
JP
Japan
Prior art keywords
coated paper
printing
paper
rotary printing
offset rotary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10501596A
Other languages
Japanese (ja)
Inventor
Tetsuya Hirabayashi
哲也 平林
Seiji Fujiwara
誠二 藤原
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.)
New Oji Paper Co Ltd
Original Assignee
Oji 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 Oji Paper Co Ltd filed Critical Oji Paper Co Ltd
Priority to JP10501596A priority Critical patent/JPH09291496A/en
Publication of JPH09291496A publication Critical patent/JPH09291496A/en
Pending legal-status Critical Current

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  • Paper (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain a coated paper for offset rotary printing which solves the problem of rumple or blister which is ready to occur on a coated paper passed through a drying step after printing in the offset rotary printing and is an excellent in the printing result. SOLUTION: This coated paper for offset rotary printing is obtained by setting up a dry coating layer, which mainly contains a pigment and an adhesive as a major component, on a stencil paper followed by calendar finish. Particularly, on the coated paper after the calender finish, the equation, [-2(b-a)+7]×100<z<[2(b-a)+1]×100 [wherein, (b-a) is <=4] must be satisfied between an internal intercalation strength (Z) which is measured in accordance with TAPPI practical test method UM 403 and a moisture (a%) in a calender-finishing product (rolled up) and an equilibrium moisture (b%) in the same product under environmental conditions of a temperature at 20 deg.C and a relative humidity of 65%.

Description

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

【0001】[0001]

【発明の属する技術分野】本発明は印刷用塗被紙に関
し、特にオフセット輪転印刷に際し、印刷後乾燥工程を
経た塗被紙に発生し易いヒジワおよびブリスターが解消
され、印刷仕上りの優れたオフセット輪転印刷用塗被紙
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coated paper for printing, and in particular, in rotary offset printing, offset wrinkles and blisters, which tend to occur on a coated paper that has undergone a drying process after printing, are eliminated, and an offset rotary printing having an excellent print finish. Related to coated paper for printing.

【0002】[0002]

【従来の技術】近年、印刷業界においても、省力化に伴
い、高速で印刷後の工程の自動化の進んだオフセット輪
転(以後、オフ輪と称す)印刷機の採用は年々増加の傾
向にある。しかし、オフ輪印刷では、印刷後に印刷物が
高温で乾燥されるために、他の印刷方式では見られない
火ぶくれ(所謂、ブリスター)や、紙が流れ方向に沿っ
て波打つ現象、所謂ヒジワ(以後、オフ輪ジワと称す)
といった現象が発生し易い。ブリスターやオフ輪ジワと
いった現象は印刷物の外観を著しく悪化せしめ、商品価
値が大きく損なわれる。したがって、オフ輪印刷におい
ては、ブリスターやオフ輪ジワの発生しない印刷用塗被
紙が強く要請されている。
2. Description of the Related Art In recent years, in the printing industry, the adoption of offset rotary (hereinafter referred to as "off wheel") printing machines, in which the post-printing process is automated at high speed, has been increasing year by year due to labor saving. However, in off-wheel printing, since the printed matter is dried at a high temperature after printing, blistering (so-called blister), which is not seen in other printing methods, or a phenomenon in which paper is wavy along the flow direction, so-called hijiwa ( Hereinafter referred to as off-wheel wrinkles)
Such a phenomenon is likely to occur. The phenomena such as blister and wrinkles on the wheels significantly deteriorate the appearance of the printed matter, and the commercial value is greatly impaired. Therefore, in off-ring printing, there is a strong demand for a printing coated paper that does not generate blisters or off-ring wrinkles.

【0003】これまでに、オフ輪ジワの発生原因につい
ては幾つかの研究がなされており、一般的には高温乾燥
における白紙部と印刷部の収縮差に起因すると考えられ
ている。即ち、印刷後の製品が乾燥工程にくると、印刷
された部分の表面はインキ皮膜で覆われているため、白
紙部と比較して紙中の水分が飛散されにくい。そのため
に、白紙部が先に収縮し始め、印刷部分に横方向の圧縮
力がかかり印刷部にシワが発生する。このような現象を
抑えるため、特開昭58−186700号公報では、塗
被紙用原紙のパルプのフリーネスを規定することを提案
している。しかしながら、オフ輪印刷用塗被紙の製造
は、抄紙、塗工、キャレンダー(加圧)仕上げと多くの
工程を経ており、パルプのフリーネスを調製するのみで
は、オフ輪ジワを満足に解消できないのが実状である。
To date, some studies have been conducted on the cause of the occurrence of off-ring wrinkles, and it is generally considered that the cause is the difference in shrinkage between the blank portion and the printed portion during high temperature drying. That is, when the product after printing comes to the drying step, the surface of the printed part is covered with the ink film, so that the water content in the paper is less likely to be scattered than in the blank part. As a result, the white paper portion starts to shrink first, and a lateral compressive force is applied to the printed portion, causing wrinkles in the printed portion. In order to suppress such a phenomenon, Japanese Patent Application Laid-Open No. 58-186700 proposes to regulate the freeness of the pulp of the base paper for coated paper. However, the production of coated paper for off-ring printing has undergone many processes such as papermaking, coating, and calender (pressurization) finishing, and it is not possible to satisfactorily eliminate off-ring wrinkles simply by adjusting the freeness of pulp. Is the actual situation.

【0004】[0004]

【発明が解決しようとする課題】本発明は、オフ輪印刷
用塗被紙に要求される、重要な課題であるオフ輪ジワと
ブリスターの発生を抑え、商品性の高いオフ輪印刷用塗
被紙を提供する。
DISCLOSURE OF THE INVENTION The present invention suppresses the occurrence of off-ring wrinkles and blisters, which are important problems required for coated paper for off-ring printing, and has high commercialability. Provide the paper.

【0005】[0005]

【課題を解決するための手段】本発明は、原紙に顔料お
よび接着剤を主成分とする乾燥塗工層を設けた後、キャ
レンダー仕上げして得られるオフセット輪転印刷用塗被
紙において、該キャレンダー仕上げ後の塗被紙のTAP
PI実用試験法UM 403に準拠して測定される内部層間
強度(Z)と、該キャレンダー仕上げ製品(巻き取り)
の水分(a%)、および同じ製品の温度20℃、関係湿
度65%の環境下における平衡水分(b%)との間に下
記(1)式の条件が満たされることを特徴とするオフセ
ット輪転印刷用塗被紙である。 {−2(b−a)+7}×100<Z<{2(b−a)+1}×100 (1) ここに、(b−a)≦4である。
The present invention provides a coated paper for offset rotary printing, which is obtained by calendering after providing a dry coating layer containing a pigment and an adhesive as a main component on a base paper. TAP of coated paper after calendering
Internal interlayer strength (Z) measured according to PI practical test method UM 403, and the calendered finished product (winding)
(A%) of the same product and the equilibrium water content (b%) under the environment of the same product temperature of 20 ° C. and relative humidity of 65%, and the condition of the following formula (1) is satisfied. It is a coated paper for printing. {-2 (ba) +7} * 100 <Z <{2 (ba) +1} * 100 (1) Here, (ba) <= 4.

【0006】[0006]

【発明の実施の形態】上記の如き実状より、本発明者等
は、オフ輪印刷用塗被紙のオフ輪ジワ改善のために鋭意
研究を重ねた。その結果、塗被層を設けた塗被紙の内部
強度と最終塗被紙のもつ水分とオフ輪ジワとの間には極
めて密接な関係があり、下記の(1)式で示されるよう
に、塗被紙の内部強度と水分量を規定の範囲内で調整す
ることにより、オフ輪ジワが軽減乃至解消できることを
見出し、遂に本発明を完成したものである。 {−2(b−a)+7}×100<Z<{2(b−a)+1}×100 (1) ここに、b−a≦4(%)である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Based on the above situation, the inventors of the present invention have conducted earnest studies to improve the off-ring wrinkles of coated paper for off-ring printing. As a result, there is an extremely close relationship between the internal strength of the coated paper provided with the coating layer, the water content of the final coated paper, and the wrinkle of the off-ring, and as shown by the following equation (1): The present invention has been completed, and finally, the present invention has been completed by finding that the off-ring wrinkles can be reduced or eliminated by adjusting the internal strength and the water content of the coated paper within the specified ranges. {−2 (b−a) +7} × 100 <Z <{2 (b−a) +1} × 100 (1) where b−a ≦ 4 (%).

【0007】(1)式の右辺は、オフ輪ジワを解消する
ための塗被紙の内部層間強度の上限を規定するものであ
り、具体的には、温度20℃、関係湿度(以後、単に湿
度と称す)65%の環境下での塗被紙(製品)の平衡水
分と該塗被紙のキャレンダー仕上げ後の製品(巻き取
り)の水分差によって規定した内部層間強度である。本
発明者等の研究によれば、塗被紙のTAPPI実用試験
法UM 403に準拠して測定される内部層間強度は、乾燥
工程における寸法変化と極めて密接な関係にあり、この
内部層間強度はパルプ繊維の結合度を示す指標となるも
のである。即ち、内部層間強度の強い原紙は、紙層内
で、各繊維同志が多くの接着点を有し強く結びついてい
ると推定される。そのために、印刷後の熱乾燥工程で繊
維が収縮する際に、その動きが紙全体の寸法変化に直接
結びつく傾向にある。結果として、乾燥工程での白紙部
の収縮はより大きくなり、オフ輪ジワを悪化させる。よ
って、この内部層間強度は、オフ輪ジワ解消のためには
低い方が望ましい。
The right side of the equation (1) defines the upper limit of the internal interlayer strength of the coated paper for eliminating the off-ring wrinkle, and specifically, the temperature is 20 ° C. and the relative humidity (hereinafter, simply It is the internal interlayer strength defined by the difference between the equilibrium water content of the coated paper (product) under the environment of 65% and the water content of the product (rolling up) of the coated paper after calendering. According to the research conducted by the present inventors, the internal interlaminar strength of the coated paper measured according to TAPPI practical test method UM 403 is very closely related to the dimensional change in the drying process, and the internal interlaminar strength is It is an index showing the degree of binding of pulp fibers. That is, it is presumed that, in the base paper having a strong internal interlaminar strength, each fiber has many bonding points and is strongly connected in the paper layer. Therefore, when the fiber shrinks in the heat drying step after printing, its movement tends to be directly linked to the dimensional change of the entire paper. As a result, the shrinkage of the blank portion in the drying process becomes larger, which worsens the wrinkle of the off-ring. Therefore, it is desirable that the inner interlayer strength be low in order to eliminate the wrinkles of the off-wheel.

【0008】また、温度20℃、湿度65%の環境下で
の平衡水分と、キャレンダー仕上げ後の巻き取り(製
品)水分との差であるが、これは、印刷後に塗被紙の水
分が乾燥工程で蒸発する水分量の指標となるものであ
る。一般に紙水分とは、紙を高温で加熱乾燥し、水分が
完全に無くなった状態としたときの絶対値として扱われ
るものである。
The difference between the equilibrium water content in an environment of a temperature of 20 ° C. and a humidity of 65% and the water content of the winding (product) after calendering is that the water content of the coated paper after printing is It is an index of the amount of water evaporated in the drying process. Generally, the paper moisture is treated as an absolute value when the paper is heated and dried at a high temperature to completely lose the moisture.

【0009】ところで、本発明者等の研究によると、印
刷後乾燥工程を経た紙の収縮挙動は、温度20℃、湿度
65%の環境下における塗被紙固有の平衡水分と同じ塗
被紙で印刷直前の塗被紙(即ち、巻き取り製品)のもつ
水分との差に密接な関係のあることを見出した。即ち、
キャレンダー仕上げ後の巻き取り製品(印刷直前の塗被
紙)の水分と該製品の温度20℃、湿度65%の環境下
における平衡水分(顔料塗被紙の温度20℃、湿度65
%における平衡水分は原紙のパルプ組成や、塗被層のコ
ート量、組成内容等により異なるが、一般的には5〜9
重量%程度である)との差が小さい場合、印刷後の乾燥
時に水分が飛散し易い。そのために、白紙部が急激に収
縮しオフ輪ジワが悪化する。よって、温度20℃、湿度
65%の環境下における塗被紙固有の平衡水分と、印刷
前の塗被紙の水分との差は大きいほどオフ輪ジワ改善に
は有効であるが、乾燥能力が同じとすれば、巻き取り水
分を低下させるには操業速度を低下させる必要があり、
生産性の点からはマイナスである。
By the way, according to the research conducted by the present inventors, the shrinkage behavior of the paper after the drying process after printing is the same as the equilibrium moisture specific to the coated paper under the environment of the temperature of 20 ° C. and the humidity of 65%. It was found that there is a close relationship with the difference between the water content of the coated paper (that is, the wound product) immediately before printing. That is,
Moisture of the rolled product after calendering (coated paper immediately before printing) and equilibrium moisture in an environment where the temperature of the product is 20 ° C and humidity is 65% (temperature of pigment-coated paper is 20 ° C, humidity is 65%).
The equilibrium water content in% depends on the pulp composition of the base paper, the coating amount of the coating layer, the content of the composition, etc., but is generally 5 to 9
If the difference is less than 100% by weight), the water tends to scatter during drying after printing. As a result, the blank area contracts sharply and the off-wheel wrinkle deteriorates. Therefore, the larger the difference between the equilibrium moisture specific to the coated paper under the environment of the temperature of 20 ° C. and the humidity of 65% and the moisture of the coated paper before printing is, the more effective it is to improve the wrinkle of the offset ring, but the drying ability If it is the same, it is necessary to reduce the operating speed in order to reduce the winding moisture,
Negative from a productivity point of view.

【0010】以上の如き理由より、本発明者等は、内部
層間強度の異なる塗被紙(巻き取り製品)の水分を変え
てオフ輪ジワの評価を行った。その結果、製品の内部層
間強度が、キャレンダー仕上げ後の巻き取り製品(印刷
直前の塗被紙)の水分(a%)と当該製品の温度20
℃、湿度65%の環境下における平衡水分(b%)との
水分差(b−a)を前記(1)式の右辺の式の如く表示
したときの内部層間強度より小さくなるように調整する
と、その理由については定かでないがオフ輪ジワが極め
て効果的に改善(軽減〜解消)されることが分かった。
なお、(1)式において、(b−a)は4以下とするも
のである。即ち、4を越えるような水分差を設けると、
印刷時に周囲の環境により塗被紙が伸び易くなり、見当
ずれを発生させたり、あるいは静電気を誘発したりして
印刷作業性を低下させる虞れがあるためである。よっ
て、(b−a)は4以下、好ましくは3以下となるよう
に設定すべきである。
For the above reasons, the present inventors evaluated the off-ring wrinkles by changing the water content of coated papers (rolled products) having different internal interlayer strengths. As a result, the internal interlayer strength of the product depends on the water content (a%) of the rolled product (coated paper immediately before printing) after calendering and the temperature of the product.
If the water content difference (ba) from the equilibrium water content (b%) under the environment of ℃ and humidity of 65% is adjusted to be smaller than the internal interlayer strength when expressed as the formula on the right side of the above formula (1). , The reason for this is not clear, but it has been found that the wrinkles of the off-wheel are extremely effectively improved (reduced to eliminated).
In the formula (1), (ba) is 4 or less. That is, if a water content difference of more than 4 is provided,
This is because the coated paper is liable to stretch due to the surrounding environment during printing, which may cause misregistration or induce static electricity, which may reduce printing workability. Therefore, (ba) should be set to 4 or less, preferably 3 or less.

【0011】また、(1)式の左辺は、ブリスター発生
を抑えるための塗被紙の内部層間強度の下限を示すもの
である。前述した如く、オフ輪ジワの解消のためには塗
被紙の内部層間強度は小さい方が望ましい。しかしなが
ら、オフ輪印刷に際しては、オフ輪ジワだけでなく、印
刷後乾燥工程で生じるブリスター(火ぶくれ)発生の問
題がある。このブリスターは、塗被紙内部の水分が乾燥
により急激に蒸発し、その力によって塗被層で覆われた
原紙層内部を破壊させようとする力により生じた層間剥
離現象である。内部層間強度が発生した水蒸気圧に耐え
得る程強ければ、原紙層は破壊されずにブリスターは発
生しない。したがって、ブリスターだけに限定して考え
ると、内部層間強度は強い程望ましいことになる。以上
を要約すると、内部層間強度に着目した場合、耐ブリス
ター適性からは強い方が、他方オフ輪ジワ対策面からは
弱い方が望ましいことになり、両者は相反することにな
る。そこで、数多くの試作品を対照に検討した結果、
(1)式のような範囲にある内部層間強度を有するオフ
輪印刷用塗被紙は、オフ輪ジワの発生が少なく、かつ耐
ブリスター適性にも優れる塗被紙であることを見出した
のである。
The left side of the equation (1) shows the lower limit of the internal interlayer strength of the coated paper for suppressing the occurrence of blisters. As described above, it is desirable that the inner layer strength of the coated paper is small in order to eliminate the wrinkles of the ring. However, in the off-ring printing, there is a problem of not only the off-ring wrinkles but also the occurrence of blisters (blistering) occurring in the drying process after printing. This blister is a delamination phenomenon caused by the force of water inside the coated paper that is abruptly evaporated by drying and the force of the water tends to destroy the inside of the base paper layer covered with the coated layer. If the internal interlayer strength is strong enough to withstand the generated water vapor pressure, the base paper layer will not be destroyed and blisters will not occur. Therefore, considering only the blister, the stronger the internal interlayer strength is, the more desirable it is. To summarize the above, when focusing on the strength of the inner layer, it is preferable that the strength is stronger from the viewpoint of suitability for blistering, and the weaker from the standpoint of countermeasures against wrinkles of the off-wheels. Therefore, as a result of examining many prototypes as contrasts,
It has been found that the coated paper for off-ring printing having an internal interlaminar strength within the range of the formula (1) is a coated paper which has less occurrence of off-ring wrinkles and is also excellent in blister resistance. .

【0012】因みに、内部層間強度の調整方法として
は、特に限定するものではないが、例えば内添紙力増強
剤の選択およびその添加量、あるいは抄紙に際し原紙を
構成するパルプの叩解条件、サイズプレス等の装置を用
いて原紙へ塗被する表面紙力増強剤等の選択、塗被量に
よる調整方法が適宜取られる。
Incidentally, the method for adjusting the internal interlaminar strength is not particularly limited, but for example, the selection of the internal paper strength enhancer and its addition amount, the beating conditions of the pulp constituting the base paper at the time of papermaking, the size press The method of selecting the surface paper strength enhancer or the like to be coated on the base paper by using such an apparatus, and adjusting the coating amount appropriately.

【0013】さらに付言すると、ブリスターは、オフ輪
ジワの場合と同様に温度20℃、湿度65%の環境下で
の塗被紙のもつ平衡水分(b%)と、同じ製品の印刷直
前の塗被紙(巻き取り製品)の水分(a%)との差にも
大きく影響される。即ち、その差が小さい程(aが大き
い程/製品のもつ絶対水分が多い程)、塗被層内部に発
生した水蒸気の圧力が強くなり、結果的にブリスターが
発生し易くなる。よって、本発明では、このような水蒸
気の圧力に耐え得る製品の内部層間強度として、(1)
式の左辺の式で表示される内部層間強度より大きい内部
層間強度が必要であることを見出したのである。さら
に、内部層間強度は50(ft・lb/in2 ×1000)
以上、好ましくは100(ft・lb/in2 ×1000)
以上とする必要がある。因みに、製品の内部層間強度が
50(ft・lb/in2 ×1000)未満の場合には、水
分の調整を行いブリスターの発生を抑えても、印刷時の
インキのタックによる層間剥離(ピック現象)を発生さ
せる懸念がある。
In addition, the blister is the equilibrium water content (b%) of the coated paper under the environment of the temperature of 20 ° C. and the humidity of 65% and the coating of the same product immediately before printing, as in the case of the wrinkle. It is also greatly affected by the difference with the water content (a%) of the paper (rolled product). That is, the smaller the difference (the larger a / the larger the absolute water content of the product), the stronger the pressure of the steam generated inside the coating layer, and as a result, the blister is likely to occur. Therefore, in the present invention, as the internal interlayer strength of a product that can withstand such a pressure of water vapor, (1)
It has been found that the internal interlayer strength is required to be larger than the internal interlayer strength indicated by the formula on the left side of the formula. Furthermore, the internal interlayer strength is 50 (ft · lb / in 2 × 1000)
Or more, preferably 100 (ft · lb / in 2 × 1000)
It is necessary to do above. By the way, when the internal interlayer strength of the product is less than 50 (ft · lb / in 2 × 1000), even if the occurrence of blisters is suppressed by adjusting the water content, delamination due to ink tack during printing (pick phenomenon) ) May occur.

【0014】また、オフ輪用塗被紙(巻き取り製品)水
分(a%)は任意に設定することのできるものである
が、例えば0%にした場合は、ブリスターもオフ輪ジワ
も問題は殆どなくなると思われる。しかしながら、一方
でキャレンダー仕上げにおける平滑化効果が殆ど得られ
ないなど、印刷用塗被紙として満足な品質が得られな
い、あるいは印刷後の吸湿による紙癖等の問題が懸念さ
れる。さらに、実際に製品の水分を0%まで乾燥するに
は莫大な乾燥エネルギーが必要となり、製造原価が高く
なり過ぎる等の問題もある。したがって、塗被紙として
の総合的な品質を維持し、オフ輪印刷が満足にできるた
めには、最低1.0%、より好ましくは2.0%以上は
必要である。
Further, the water content (a%) of the coated paper for the off wheel (rolled product) can be arbitrarily set, but when it is set to 0%, for example, there is no problem with the blister and the off wheel wrinkle. It seems to be almost gone. On the other hand, on the other hand, there is a concern that the smoothing effect in the calendering is hardly obtained, that the satisfactory quality of the coated paper for printing cannot be obtained, or that the paper habit due to moisture absorption after printing is caused. Furthermore, enormous drying energy is required to actually dry the water content of the product to 0%, and there is a problem that the manufacturing cost becomes too high. Therefore, in order to maintain the overall quality of the coated paper and to be able to satisfy the offset printing, the minimum amount is 1.0%, preferably 2.0% or more.

【0015】次ぎに、本発明に係る塗被紙用の原紙とし
ては、上記の特定される内部層間強度を満足するもので
あればパルプの種類等は特に限定されるものではなく、
例えば広葉樹晒クラフトパルプ、針葉樹晒クラフトパル
プ、高歩留りパルプ、古紙パルプ等任意に選択して使用
することができる。また、抄紙に際しては、酸性抄紙、
あるいはアルカリ性抄紙のいずれの方法でも適用でき、
サイズプレス、ロールコーター、ブレードコーター等で
予備塗工を施したような原紙も使用できる。
Next, as the base paper for coated paper according to the present invention, the kind of pulp is not particularly limited as long as it satisfies the above specified internal interlayer strength.
For example, bleached hardwood kraft pulp, bleached softwood kraft pulp, high-yield pulp, waste paper pulp and the like can be arbitrarily selected and used. When making paper, acidic paper making,
Or it can be applied by any method of alkaline paper making,
A base paper which has been pre-coated with a size press, roll coater, blade coater or the like can also be used.

【0016】また、本発明のオフ輪用印刷塗被紙の製造
において、その塗被組成物の主成分の1つである顔料に
ついても、特に限定されるものではなく、一般に塗被紙
製造分野で使用されている顔料の1種以上が適宜使用さ
れる。例えば、クレー、カオリン、水酸化アルミニウ
ム、沈降性炭酸カルシウム、重質炭酸カルシウム、二酸
化チタン、硫酸バリウム、酸化亜鉛、サチンホワイト、
硫酸カルシウム、タルク、プラスチックピグメント等を
例示することができる。
Further, in the production of the printing coated paper for off wheels of the present invention, the pigment which is one of the main components of the coating composition is not particularly limited, and is generally in the field of coated paper production. One or more of the pigments used in 1. are appropriately used. For example, clay, kaolin, aluminum hydroxide, precipitated calcium carbonate, ground calcium carbonate, titanium dioxide, barium sulfate, zinc oxide, satin white,
Examples thereof include calcium sulfate, talc, plastic pigment and the like.

【0017】また、顔料と同時に使用される接着剤とし
ては、例えばスチレン−ブタジエン共重合体、メチルメ
タクリレート−ブタジエン共重合体等の共役ジエン系共
重合体ラテックス、アクリル酸エステルおよび/または
メタクリル酸エステル等の重合体または共重合体等のア
クリル系重合体ラテックス、エチレン−酢酸ビニル共重
合体等のビニル系重合体ラテックス、あるいはこれらの
各種重合体ラテックスをカルボキシル基等の官能基含有
単量体で変性したアルカリ部分溶解性あるいはアルカリ
非溶解性の重合体ラテックス、さらには陽性化澱粉、酸
化澱粉、酵素変性澱粉、熱化学変性澱粉、エーテル化澱
粉、エステル化澱粉、冷水可溶澱粉等の澱粉類、カルボ
キシメチルセルロース、ヒドロキシメチルセルロース等
のセルロース類、ポリビニルアルコール、オレフィン−
無水マレイン酸樹脂などの水溶性合成接着剤も適宜使用
される。これらの顔料および接着剤の他に、必要に応じ
て分散剤、耐水化剤、流動変性剤、着色剤、蛍光増白剤
等の各種添加剤が添加され、固形分濃度が40〜75重
量%の塗被組成物に仕上げられる。
As the adhesive used together with the pigment, for example, a conjugated diene copolymer latex such as a styrene-butadiene copolymer or a methyl methacrylate-butadiene copolymer, an acrylic acid ester and / or a methacrylic acid ester is used. Acrylic polymer latex such as polymer or copolymer such as, vinyl polymer latex such as ethylene-vinyl acetate copolymer, or these various polymer latex with a functional group-containing monomer such as carboxyl group Modified alkali partially soluble or alkali-insoluble polymer latex, and starches such as positive starch, oxidized starch, enzyme modified starch, thermochemically modified starch, etherified starch, esterified starch, cold water soluble starch, etc. , Celluloses such as carboxymethyl cellulose and hydroxymethyl cellulose, Polyvinyl alcohol, olefin -
A water-soluble synthetic adhesive such as maleic anhydride resin is also appropriately used. In addition to these pigments and adhesives, various additives such as a dispersant, a water-proofing agent, a flow modifier, a colorant, and an optical brightener are added, if necessary, and the solid content concentration is 40 to 75% by weight. Coating composition.

【0018】塗被組成物(以後、塗料と称す)を原紙へ
塗工する際の塗工装置としては、一般の塗被紙の製造に
用いられる塗工装置、例えばブレードコーター、エアー
ナイフコーター、ロールコーター、リバースロールコー
ター、バーコーター、カーテンコーター、ダイスロット
コーター、グラビアコーター、チャンプレックスコータ
ー、サイズプレスコーター等の塗工装置を設けたオンマ
シンあるいはオフマシンコーターによって、原紙の少な
くとも片面に一層あるいは多層に分けて塗工される。そ
の際の塗料の固形分濃度は、前記した如く一般に40〜
75重量%程度であるが、操業性を考慮すると45〜7
0重量%の範囲が好ましい。また、キャレンダー仕上げ
の方法は、グロスあるいはマットキャレンダーとして、
例えばスーパーキャレンダー、グロスキャレンダー、ソ
フトコンパクトキャレンダーなどの金属ロールと弾性ロ
ールよりなる各種キャレンダーが、オンマシンまたはオ
フマシン仕様で適宜使用できる。しかしながら、本発明
者等の考察によると、使用するキャレンダーとして表面
温度が100℃以上の金属ロールと弾性ロールよりなる
高温キャレンダーを使用することで、キャレンダー前の
水分を低くしても、高光沢、高平滑を呈するオフ輪印刷
用塗被紙が得られ易いために、より好ましい実施態様で
ある。
As a coating device for coating a base composition with a coating composition (hereinafter referred to as a paint), a coating device used for producing a general coated paper, for example, a blade coater, an air knife coater, A roll coater, a reverse roll coater, a bar coater, a curtain coater, a die slot coater, a gravure coater, a chanplex coater, a size press coater, and the like. It is applied in multiple layers. The solid content concentration of the paint at that time is generally 40 to 40 as described above.
It is about 75% by weight, but 45 to 7 considering the operability.
A range of 0% by weight is preferred. Also, the method of calendering is as a gloss or mat calender,
For example, various calenders including metal rolls and elastic rolls such as a super calender, a gross calender, and a soft compact calender can be appropriately used in on-machine or off-machine specifications. However, according to the consideration of the present inventors, even if the moisture before the calender is lowered by using a high temperature calender composed of a metal roll having a surface temperature of 100 ° C. or more and an elastic roll as the calender to be used, This is a more preferable embodiment because a coated paper for off-ring printing that exhibits high gloss and high smoothness can be easily obtained.

【0019】[0019]

【実施例】以下に実施例を挙げて本発明を具体的に説明
するが、勿論、本発明はそれらの範囲に限定されるもの
ではない。また、例中の「部」および「%」は特に断ら
ない限り、それぞれ「重量部」および「重量%」を示
す。なお評価方法は下記の通りである。
EXAMPLES The present invention will be specifically described below with reference to examples, but of course the present invention is not limited to these ranges. Unless otherwise specified, "parts" and "%" in the examples mean "parts by weight" and "% by weight", respectively. The evaluation method is as follows.

【0020】(内部層間強度)TAPPI実用試験法U
M 403の「内部結合試験機による繊維間結合試験」に準
拠して測定した。
(Internal interlayer strength) TAPPI practical test method U
It measured based on M403 "interfiber bond test by an internal bond tester."

【0021】(塗被紙水分)JIS P−8127の
「紙及び板紙の水分試験方法」に準拠して測定した。
(Water content of coated paper) The water content was measured according to JIS P-8127 "Paper and board moisture test method".

【0022】(オフ輪ジワの評価)オフ輪用印刷機(シ
ステムC−20/小森コーポレーション製)を用いて印
刷を行い、発生したオフ輪ジワを目視により、下記の基
準により観察した。 〔評価基準〕 ◎ :オフ輪ジワの発生が殆ど見られない。 ○ :極めて軽度のオフ輪ジワの発生が見られる。 △ :オフ輪ジワの発生が見られる。 × :きついオフ輪ジワの発生が見られる。
(Evaluation of Off-ring Wrinkles) Printing was performed using an off-ring printing machine (System C-20 / manufactured by Komori Corporation), and the generated off-ring wrinkles were visually observed according to the following criteria. [Evaluation Criteria] ⊚: Almost no occurrence of wrinkles in off wheels ○: Extremely slight occurrence of wrinkles in the off-ring is observed. Δ: Off-ring wrinkles are observed. ×: Tight off-wheel wrinkles are observed.

【0023】実施例1 (原紙の調製)LBKP(c.s.f. 510ml)90部、
NBKP(c.s.f. 460ml)10部からなるパルプス
ラリーに、填料としてタルクを紙灰分が9%になるよう
に添加し、さらに内添ロジンサイズ剤(商品名:サイズ
パインE /荒川化学製)0. 7部および硫酸アルミニウ
ム2部を添加して紙料を調製した後、長網抄紙機にて抄
紙し原々紙を得た。この原々紙に、5%濃度の酸化澱粉
(商品名:エースA/王子コーンスターチ製)水溶液を
用いてサイズプレス処理を行い、乾燥後塗工用原紙を得
た。この時のサイズプレス処理量は両面で8g/m2
あった。このようにして得られた原紙の米坪は60g/
2 であった。
Example 1 (Preparation of base paper) 90 parts of LBKP (csf 510 ml),
Talc as a filler was added to a pulp slurry consisting of 10 parts of NBKP (csf 460 ml) so that the paper ash content was 9%, and further rosin sizing agent (trade name: Size Pine E / Arakawa Chemical Co., Ltd.) 0.7 was added internally. Parts and 2 parts of aluminum sulfate were added to prepare a paper stock, which was then made with a Fourdrinier paper machine to obtain raw paper. This raw paper was size-pressed using an aqueous solution of oxidized starch (trade name: Ace A / manufactured by Oji Corn Starch) having a concentration of 5%, and a base paper for coating was obtained after drying. The amount of size press treatment at this time was 8 g / m 2 on both sides. The base paper thus obtained has a basis weight of 60 g / m 2.
m 2 .

【0024】(塗料の調製)重質炭酸カルシウム(商品
名:FMT−90/ファイマティック社製)30部、カ
オリン(商品名:アマゾン88/CADAM社製)70
部からなる顔料をコーレス分散機を用いて分散し、顔料
スラリーを得た。この顔料スラリーにスチレン−ブタジ
エン共重合体ラテックス(商品名:SN307/住友ダ
ウ社製)10部(固形分)、酸化澱粉糊液(商品名:エ
ースA/王子コーンスターチ社製)5部(固形分)から
なる固形分濃度55%の塗料を調製した。
(Preparation of paint) 30 parts of heavy calcium carbonate (trade name: FMT-90 / manufactured by Phimatic), kaolin (trade name: Amazon 88 / manufactured by CADAM) 70
Part of the pigment was dispersed using a Choles disperser to obtain a pigment slurry. Styrene-butadiene copolymer latex (trade name: SN307 / Sumitomo Dow) 10 parts (solid content), oxidized starch paste solution (trade name: Ace A / Oji Corn Starch) 5 parts (solid content) Was prepared with a solid content concentration of 55%.

【0025】(塗被紙の製造)上記の塗料を用いて、前
記の米坪60g/m2 原紙に、片面当たり乾燥重量で1
8g/m2 になるようにブレードコーターで両面塗工を
行った。かくして得られた塗被紙を、金属ロールとコッ
トンロールよりなるスーパーキャレンダーに通紙し、オ
フ輪印刷用塗被紙を得た。このときの金属ロールの表面
温度は50℃であった。なお、塗料塗工後、乾燥等の条
件を適宜調整し、スーパーキャレンダー後(巻き取り製
品)の水分は3.3%であった。このようにして得た塗
被紙の内部層間強度、光沢、温度20℃/湿度65%に
おける平衡水分、およびオフ輪ジワ評価を表1に示し
た。
(Production of Coated Paper) Using the above-mentioned paint, 60 g / m 2 of the above-mentioned base paper is dried and the dry weight per side is 1
Both sides were coated with a blade coater so as to have a weight of 8 g / m 2 . The coated paper thus obtained was passed through a super calender consisting of a metal roll and a cotton roll to obtain a coated paper for off-ring printing. The surface temperature of the metal roll at this time was 50 ° C. After coating the coating material, conditions such as drying were appropriately adjusted, and the water content after super calendering (rolled product) was 3.3%. Table 1 shows the internal interlayer strength, gloss, equilibrium water content at a temperature of 20 ° C./humidity of 65%, and off-ring wrinkle evaluation of the coated paper thus obtained.

【0026】実施例2 実施例1において、スーパーキャレンダー掛けの際、金
属ロールの表面温度を120℃とし、弾性ロールを硬質
プラスチックロールとした以外は実施例1と同様にして
オフ輪印刷用塗被紙を得た。この時のスーパーキャレン
ダー後(巻き取り製品)の水分は3.1%であった。こ
のようにして得られた塗被紙の内部層間強度、光沢、温
度20℃/湿度65%における平衡水分、およびオフ輪
ジワの評価を表1に示した。
Example 2 A coating for off-ring printing was carried out in the same manner as in Example 1 except that the surface temperature of the metal roll was 120 ° C. and the elastic roll was a hard plastic roll when the super calender was applied. I got the paper. At this time, the water content after the super calender (rolled product) was 3.1%. Table 1 shows the evaluation of the inner interlayer strength, gloss, equilibrium moisture content at a temperature of 20 ° C./humidity of 65%, and off-ring wrinkles of the coated paper thus obtained.

【0027】実施例3 実施例1において、パルプ調製に際し、使用したパルプ
をLBKP(c.s.f.430ml)100部からなるパルプ
スラリーとし、該パルプスラリー中に填料としてタルク
を紙灰分で6%となるように添加し、さらに内添紙力剤
(商品名:KW−356/荒川化学社製)0.3部を添
加した以外は、実施例1と同様にしてオフ輪印刷用塗被
紙を得た。なお、この時のスーパーキャレンダー後(巻
き取り製品)の水分は3.9%であった。このようにし
て得られた塗被紙の内部層間強度、光沢、温度20℃/
湿度65%における平衡水分、およびオフ輪ジワの評価
を表1に示した。
Example 3 In Example 1, in the pulp preparation, the pulp used was made into a pulp slurry consisting of 100 parts of LBKP (csf430 ml), and talc was added as a filler to the pulp slurry so that the ash content was 6%. Then, a coated paper for off-axis printing was obtained in the same manner as in Example 1 except that 0.3 part of an internally added paper strength agent (trade name: KW-356 / manufactured by Arakawa Chemical Co., Ltd.) was added. The water content after the super calendering (rolled product) was 3.9%. The inner layer strength, gloss, and temperature of the coated paper thus obtained were 20 ° C /
Table 1 shows the evaluation of the equilibrium water content at a humidity of 65% and the number of wrinkles.

【0028】実施例4 実施例3において、スーパーキャレンダー掛けの際、金
属ロールの表面温度を120℃とし、弾性ロールを硬質
プラスチックとした以外は実施例3と同様にしてオフ輪
印刷用塗被紙を得た。なお、この時のスーパーキャレン
ダー後(巻き取り製品)の水分は3.7%であった。こ
のようにして得られた塗被紙の内部層間強度、光沢、温
度20℃/湿度65%における平衡水分、およびオフ輪
ジワの評価を表1に示した。
Example 4 A coating for off-ring printing was carried out in the same manner as in Example 3 except that the surface temperature of the metal roll was set to 120 ° C. and the elastic roll was made of hard plastic during super calendering. Got the paper. The water content after the super calendering (rolled product) was 3.7%. Table 1 shows the evaluation of the inner interlayer strength, gloss, equilibrium moisture content at a temperature of 20 ° C./humidity of 65%, and off-ring wrinkles of the coated paper thus obtained.

【0029】実施例5 実施例1において、使用したパルプをLBKP(c.s.f.
380ml)70部、NBKP(c.s.f. 420ml)3
0部に変更し、填料としてタルクを紙灰分が5%になる
ように添加し、内添紙力剤(商品名:KW−356/荒
川化学社製)0.8部を添加した以外は、実施例1と同
様にしてオフ輪印刷用塗被紙を得た。なお、この時のス
ーパーキャレンダー後(巻き取り製品)の水分は2.8
%であった。このようにして得られた塗被紙の内部層間
強度、光沢、温度20℃/湿度65%における平衡水
分、およびオフ輪ジワの評価を表1に示した。
Example 5 In Example 1, the pulp used was LBKP (csf
380 ml) 70 parts, NBKP (csf 420 ml) 3
Change to 0 parts, except that talc was added as a filler so that the paper ash content was 5%, and 0.8 parts of an internally added paper strength agent (trade name: KW-356 / Arakawa Chemical Co., Ltd.) was added. A coated paper for offset printing was obtained in the same manner as in Example 1. The water content after the super calender (rolled product) was 2.8.
%Met. Table 1 shows the evaluation of the inner interlayer strength, gloss, equilibrium moisture content at a temperature of 20 ° C./humidity of 65%, and off-ring wrinkles of the coated paper thus obtained.

【0030】実施例6 実施例5において、スーパーキャレンダー掛けの際、金
属ロールの表面温度を120℃とし、弾性ロールを硬質
プラスチックとした以外は実施例5と同様にしてオフ輪
印刷用塗被紙を得た。なお、この時のスーパーキャレン
ダー後(巻き取り製品)の水分は2.6%であった。こ
のようにして得られた塗被紙の内部層間強度、光沢、温
度20℃/湿度65%における平衡水分、およびオフ輪
ジワの評価を表1に示した。
Example 6 The coating for off-ring printing was carried out in the same manner as in Example 5 except that the surface temperature of the metal roll was set to 120 ° C. and the elastic roll was made of hard plastic during super calendering. Got the paper. The water content after the super calendering (rolled product) was 2.6%. Table 1 shows the evaluation of the inner interlayer strength, gloss, equilibrium moisture content at a temperature of 20 ° C./humidity of 65%, and off-ring wrinkles of the coated paper thus obtained.

【0031】比較例1 実施例1において、スーパーキャレンダー後(巻き取り
製品)の水分3.3%を5.4%となるように調節した
以外は、実施例1と同様にしてオフ輪印刷用塗被紙を得
た。このようにして得られた塗被紙の内部層間強度、光
沢、温度20℃/湿度65%における平衡水分、および
オフ輪ジワの評価を表1に示した。
Comparative Example 1 Off-wheel printing was carried out in the same manner as in Example 1 except that the water content after supercalendering (rolled product) was adjusted to 3.3% to 5.4%. A coated paper was obtained. Table 1 shows the evaluation of the inner interlayer strength, gloss, equilibrium moisture content at a temperature of 20 ° C./humidity of 65%, and off-ring wrinkles of the coated paper thus obtained.

【0032】比較例2 実施例3において、スーパーキャレンダー後(巻き取り
製品)の水分3.9%を5.3%となるように調節した
以外は、実施例3と同様にしてオフ輪印刷用塗被紙を得
た。このようにして得られた塗被紙の内部層間強度、光
沢、温度20℃/湿度65%における平衡水分、および
オフ輪ジワの評価を表1に示した。
Comparative Example 2 Off-wheel printing was carried out in the same manner as in Example 3, except that the water content after supercalendering (rolled product) was adjusted to 5.3% in Example 3. A coated paper was obtained. Table 1 shows the evaluation of the inner interlayer strength, gloss, equilibrium moisture content at a temperature of 20 ° C./humidity of 65%, and off-ring wrinkles of the coated paper thus obtained.

【0033】比較例3 実施例5において、スーパーキャレンダー後(巻き取り
製品)の水分2.8%を5.3%となるように調節した
以外は、実施例5と同様にしてオフ輪印刷用塗被紙を得
た。このようにして得られた塗被紙の内部層間強度、光
沢、温度20℃/湿度65%における平衡水分、および
オフ輪ジワの評価を表1に示した。
Comparative Example 3 Off-ring printing was carried out in the same manner as in Example 5 except that the water content of 2.8% after super calendering (rolled product) was adjusted to 5.3%. A coated paper was obtained. Table 1 shows the evaluation of the inner interlayer strength, gloss, equilibrium moisture content at a temperature of 20 ° C./humidity of 65%, and off-ring wrinkles of the coated paper thus obtained.

【0034】[0034]

【表1】 [Table 1]

【0035】[0035]

【発明の効果】表1の結果から明らかな様に、本発明の
製造方法で得られたオフ輪印刷用塗被紙は、オフ輪ジ
ワ、およびブリスターの発生しない、良好なオフ輪印刷
用塗被紙であった。
As is clear from the results shown in Table 1, the coated paper for off-ring printing obtained by the production method of the present invention is a good coating for off-ring printing that does not cause off-ring wrinkles and blisters. It was paper.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】原紙に顔料および接着剤を主成分とする乾
燥塗工層を設けた後、キャレンダー仕上げして得られる
オフセット輪転印刷用塗被紙において、該キャレンダー
仕上げ後の塗被紙のTAPPI実用試験法UM 403に準
拠して測定される内部層間強度(Z)と、該キャレンダ
ー仕上げ製品(巻き取り)の水分(a%)、および同じ
製品の温度20℃、関係湿度65%の環境下における平
衡水分(b%)との間に下記(1)式の条件が満たされ
ることを特徴とするオフセット輪転印刷用塗被紙。 {−2(b−a)+7}×100<Z<{2(b−a)+1}×100 (1) ここに、(b−a)≦4である。
1. A coated paper for offset rotary printing obtained by providing a base paper with a dry coating layer comprising a pigment and an adhesive as a main component, and then calendering the coated paper. Internal layer strength (Z) measured in accordance with TAPPI practical test method UM 403, moisture content (a%) of the calendered finished product (winding), and temperature of the same product 20 ° C., relative humidity 65% The offset coated web for offset rotary printing, characterized in that the condition of the following formula (1) is satisfied with the equilibrium water content (b%) under the environment. {-2 (ba) +7} * 100 <Z <{2 (ba) +1} * 100 (1) Here, (ba) <= 4.
【請求項2】キャレンダーが、表面温度100℃以上の
金属ロールと、弾性ロールよりなる高温キャレンダーで
ある請求項1または請求項2記載のオフセット輪転印刷
用塗被紙。
2. The coated paper for offset rotary printing according to claim 1, wherein the calender is a high temperature calender comprising a metal roll having a surface temperature of 100 ° C. or higher and an elastic roll.
JP10501596A 1996-04-25 1996-04-25 Coated paper for offset rotary printing Pending JPH09291496A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10501596A JPH09291496A (en) 1996-04-25 1996-04-25 Coated paper for offset rotary printing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10501596A JPH09291496A (en) 1996-04-25 1996-04-25 Coated paper for offset rotary printing

Publications (1)

Publication Number Publication Date
JPH09291496A true JPH09291496A (en) 1997-11-11

Family

ID=14396249

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10501596A Pending JPH09291496A (en) 1996-04-25 1996-04-25 Coated paper for offset rotary printing

Country Status (1)

Country Link
JP (1) JPH09291496A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008088625A (en) * 2007-10-30 2008-04-17 Oji Paper Co Ltd Coated paper
JP2013503986A (en) * 2009-09-09 2013-02-04 ウーペーエム−キュンメネ コーポレイション Paper product and paper product manufacturing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008088625A (en) * 2007-10-30 2008-04-17 Oji Paper Co Ltd Coated paper
JP2013503986A (en) * 2009-09-09 2013-02-04 ウーペーエム−キュンメネ コーポレイション Paper product and paper product manufacturing method

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