JPH06287891A - Production of paper and paper board - Google Patents
Production of paper and paper boardInfo
- Publication number
- JPH06287891A JPH06287891A JP3728692A JP3728692A JPH06287891A JP H06287891 A JPH06287891 A JP H06287891A JP 3728692 A JP3728692 A JP 3728692A JP 3728692 A JP3728692 A JP 3728692A JP H06287891 A JPH06287891 A JP H06287891A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- polyvinyl alcohol
- mol
- saponification degree
- coating
- 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
Links
Landscapes
- Paper (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この出願の発明は、紙及び板紙の
製造方法に関するもので、それら紙の表面強度及びブロ
ッキング性を改良するために100モル%けん化したポ
リビニルアルコールを紙表面の塗工剤として用いること
を特徴とする。BACKGROUND OF THE INVENTION 1. Field of the Invention The invention of the present application relates to a method for producing paper and paperboard, which is coated with 100 mol% saponified polyvinyl alcohol for improving the surface strength and blocking property of the paper. It is characterized by using as.
【0002】[0002]
【従来の技術】紙及び板紙製品に印刷を施す場合におい
て、印刷機のブランケット胴の汚れに因るところの問題
即ち印刷作業性、操業性の大幅ダウン及び印刷物の粗悪
化が商品価値を著しく低下させてしまう事にある。その
ブランケット胴の汚れは多くの場合、紙自体に起因し紙
表面のトラレ、また紙表面に付着した異物がもたらすも
のである。紙表面のトラレは紙むけや剥離など表面強度
に由来するところが多く、非塗工紙では表面に付着して
いる短繊維や塵埃等に因るもの、また塗工紙にあっては
その表面塗工料に因ることが考えられる。それら紙表面
に付着している異物としてカッター、スリッター加工の
際に単純に発生する紙粉や短繊維に因る物、紙の裏面と
のブロッキングによる裏面から表面への転移に因る物か
ら、抄造前に添加するバインダーや填料、薬剤等が抄紙
の各工程を経過する途上でマイグレートして紙表面に移
行すること等が汚れの一因となる。2. Description of the Related Art In the case of printing on paper and paperboard products, problems caused by stains on the blanket cylinder of a printing machine, that is, the printing workability and operability are greatly reduced, and the deterioration of the printed matter is significantly reduced, resulting in a marked decrease in commercial value. There is something to do. In many cases, the blanket cylinder is soiled by the paper itself, which is caused by the run-out on the paper surface and the foreign substances attached to the paper surface. Trays on the paper surface often come from the surface strength such as peeling and peeling.On uncoated paper, it is due to short fibers and dust adhering to the surface, and on coated paper its surface coating. It may be due to the labor cost. Cutters as foreign matter adhering to the paper surface, those caused by paper powder and short fibers that are simply generated during slitter processing, those caused by transfer from the back surface to the front surface due to blocking with the back surface of the paper, One of the causes of stains is that the binder, filler, chemicals, etc. added before papermaking migrate to the paper surface during migration through each step of papermaking.
【0003】従来、紙の製造において、印刷適性、表面
強度の向上を計るために、各種の表面処理剤が使用さ
れ、処理剤の改良や適用方法など多くの研究がなされて
いる。処理剤の種類としては一般的に、各種澱粉類、尿
素,メラミンーフオルムアルデヒド樹脂、合成ゴムラテ
ックス類、ポリビニルアルコール、ポリアクリルアミド
等が用いられ、なかでも澱粉類やポリビニルアルコール
は使用目的も広く多用されているものである。Conventionally, in the manufacture of paper, various surface treatment agents have been used in order to improve printability and surface strength, and many studies have been made on the improvement of treatment agents and application methods. Generally, various starches, urea, melamine-formaldehyde resin, synthetic rubber latices, polyvinyl alcohol, polyacrylamide, etc. are used as the type of treating agent. Among them, starch and polyvinyl alcohol are widely used. It is used extensively.
【0004】ポリビニルアルコールに関する従来技術と
して、この発明とは技術的課題を異にするものではある
が、輪転オフセット印刷用紙のブリスター抵抗を改良す
るため、不飽和モノカルボン酸(アクリル酸、メタクリ
ル酸、クロトン酸およびそれらの塩)と酢酸ビニルとの
共重合体のうち、その酢酸ビニル成分の97モル%以上
けん化した変性ポリビニルアルコールをサイズプレス、
カレンダーサイズとして用いる技術(特公昭60−39
799号)があるが、このうち酢酸ビニル成分は高い値
にけん化してはいるものの、残余の不飽和モノカルボン
酸成分は塩型で相当量含有されており、この発明の成分
のものと課題と構成を異にするもので比較対象にはなら
ない。ポリビニルアルコール成分の中に1%以上の酢酸
基またはその他の基が存在する限りこの発明は達成され
ないのである。As a prior art relating to polyvinyl alcohol, which has a technical problem different from that of the present invention, unsaturated monocarboxylic acid (acrylic acid, methacrylic acid, acrylic acid, methacrylic acid, etc.) is used to improve the blister resistance of rotary offset printing paper. Of crotonic acid and salts thereof) and vinyl acetate, a modified polyvinyl alcohol saponified by 97 mol% or more of the vinyl acetate component is size-pressed,
Technology used for calendar size (Japanese Patent Publication No. 60-39)
No. 799), of which, although the vinyl acetate component is saponified to a high value, the residual unsaturated monocarboxylic acid component is contained in a considerable amount in a salt form, and the problems with the components of the present invention And the configuration is different and is not a comparison target. The present invention cannot be achieved as long as 1% or more of acetic acid groups or other groups are present in the polyvinyl alcohol component.
【0005】[0005]
【発明が解決しようとする課題】従来一般に用いられて
いる紙の表面処理用ポリビニルアルコールが抱えている
問題点として、塗工面の表面強度の不足ポリビニル
アルコール塗工面同志か又はポリビニルアルコール塗工
面と填料塗工面とのブロッキング性の問題塗工工程に
於けるアフターロールの汚れが避けられないこと等が挙
げられる。従来、その点を改良するための試みとして
ポリビニルアルコールのけん化度を上げることポリビ
ニルアルコールの重合度を上げることアンチブロッキ
ング剤、ダスティング防止剤の添加等の方法が採られて
きた。As a problem of polyvinyl alcohol for surface treatment of paper which has been generally used conventionally, the surface strength of the coated surface is insufficient, either polyvinyl alcohol coated surface or polyvinyl alcohol coated surface and filler. The problem of blocking property with the coated surface is that the contamination of the after-roll in the coating process cannot be avoided. Heretofore, as an attempt to improve that point, methods such as increasing the saponification degree of polyvinyl alcohol, increasing the polymerization degree of polyvinyl alcohol, and adding an anti-blocking agent and a dusting inhibitor have been adopted.
【0006】その中ポリビニルアルコールのけん化度を
上げる方法は、その皮膜の粘着性を低下させ、適度の乾
燥性、紙力強度の向上に役立つ事が認められてはいるも
のの、当該ポリビニルアルコールにあって完全けん化物
と称されるものでもけん化度は97〜99モル%であ
り、意図する作用効果を奏するものでなく未だ上記欠点
を完全解決するに至っていないのが実情である。また、
重合度を上げる方法はポリビニルアルコールの粘性をた
かめ取扱に難があり、他の薬剤を添加する方法は表面強
度をさげポリビニルアルコール本来の特性を減殺させて
しまう欠点がある。Among them, the method of increasing the degree of saponification of polyvinyl alcohol is known to reduce the tackiness of the film and to improve the appropriate drying property and paper strength. Even the so-called completely saponified product has a saponification degree of 97 to 99 mol%, does not exhibit the intended action and effect, and has not yet completely solved the above-mentioned drawbacks. Also,
The method of increasing the degree of polymerization is difficult to handle because it increases the viscosity of polyvinyl alcohol, and the method of adding other chemicals has the drawback that the surface strength is reduced and the original properties of polyvinyl alcohol are diminished.
【0007】従来、紙表面の塗工処理に用いるポリビニ
ルアルコールは、通常完全けん化物と称されているもの
でもけん化度は97〜99モル%であり、これを加熱溶
解して塗工用としており、けん化度100モル%のポリ
ビニルアルコールでの塗工は、その溶解性のこと及びコ
ストの関係上、紙塗工用としては考えられなかった。こ
の発明はその慣行を超えて鋭意研究をすすめた結果、1
00モル%けん化物が意外にも塗工紙の表面強度及び耐
ブロッキング性を大幅に改善でき、しかも安価で取扱上
容易に紙に塗工することが出来ることを見出したもの
で、紙質改良に大きく貢献をすることが出来るに至っ
た。Conventionally, polyvinyl alcohol used for coating the surface of paper has a saponification degree of 97 to 99 mol% even though it is usually called a complete saponification product, and it is melted by heating to be used for coating. The coating with polyvinyl alcohol having a saponification degree of 100 mol% was not considered for paper coating because of its solubility and cost. As a result of intensive research beyond the practice of this invention, 1
Surprisingly, we have found that 00 mol% saponification can greatly improve the surface strength and blocking resistance of coated paper, and at the same time, it can be applied to paper at a low cost and easily in handling. I was able to make a big contribution.
【0008】[0008]
【課題を解決するための手段】この発明では、一般に言
うところの完全けん化ポリビニルアルコール:けん化度
90〜99モル%、好ましくは98〜99モル%:のも
のを出発物質として用い、これを加熱溶解させる時に苛
性ソーダを添加してけん化度100モル%のものを作る
ことに成功した。その際使用する苛性ソーダの量は、ポ
リビニルアルコール中に残存する未けん化の酢酸基と等
モル量で十分であり若干多くても問題はない。なお、1
00モル%けん化ポリビニルアルコールの確認方法につ
いては種々の方法がある。また、このポリビニルアルコ
ールの溶解条件は、反応温度90〜98℃、好ましくは
95℃以上で、反応時間は30分〜90分、好ましくは
60分以上である。このようにして作製したポリビニル
アルコールはフィルムの粘着性の減少、乾燥性に優れ、
塗工処理された紙は著しく表面強度が改善され、予測出
来ない顕著な効果を奏するものである。このポリビニル
アルコールの紙表面への塗工方法としては特に制約を受
けるものはなく、マシンキャレンダーおよびロール、エ
ヤナイフ、ブレードコーターなどオンマシンコーター、
オフマシンコーターに限らず支障無く利用できる。In the present invention, generally, a completely saponified polyvinyl alcohol having a saponification degree of 90 to 99 mol%, preferably 98 to 99 mol% is used as a starting material, and the starting material is dissolved by heating. Succeedingly, caustic soda was added at the time of making, and it succeeded in making the thing of 100 mol% of saponification degree. The amount of caustic soda used at that time is sufficiently equimolar to the unsaponified acetic acid groups remaining in the polyvinyl alcohol, and there is no problem even if the amount is slightly large. 1
There are various methods for identifying 00 mol% saponified polyvinyl alcohol. The polyvinyl alcohol is dissolved under a reaction temperature of 90 to 98 ° C., preferably 95 ° C. or higher, and a reaction time of 30 minutes to 90 minutes, preferably 60 minutes or longer. The polyvinyl alcohol produced in this way has a reduced film tackiness and excellent drying property,
The coated paper has remarkably improved surface strength and has an unexpected and remarkable effect. There is no particular limitation on the method of coating the polyvinyl alcohol on the paper surface, machine calender and roll, air knife, on-machine coater such as blade coater,
Not limited to off-machine coaters, it can be used without any problems.
【0009】[0009]
【作用】前記した方法によって作製したポリビニルアル
コールを成紙に塗工することで紙の塗布面の粘着性は減
少し、併せて表面強度も高くなる。この発明で用いるポ
リビニルアルコールは100モル%けん化したもので、
分子中に酢酸基は存在せず主鎖はビニルアルコール単位
の繰り返しで、1,3−グリコール形であると考えられ
る。この完全けん化物は、水酸基の分子間、また分子内
の水素結合を増加させて耐水強度や紙剥け抵抗を増して
ブロッキング性を改良し、印刷機のブランケット胴の汚
染も防止できる。By applying the polyvinyl alcohol prepared by the above-mentioned method to the paper, the adhesiveness of the coated surface of the paper is reduced and the surface strength is also increased. The polyvinyl alcohol used in this invention is 100 mol% saponified,
There is no acetate group in the molecule, and the main chain is a repeating 1,3-glycol unit, which is considered to be a 1,3-glycol type. This fully saponified product increases hydrogen bonds between the hydroxyl groups and in the molecules to increase water resistance and paper peeling resistance to improve the blocking property and prevent contamination of the blanket cylinder of the printing machine.
【0010】[0010]
【実施例1】原料となるけん化度99、0モル%、重合
度1800のポリビニルアルコール100gをとりビー
カー中で1000ccの冷水に分散させ、これに残存す
る酢酸基と等モル量(固形0.900g)の苛性ソーダ
を添加し、加熱昇温して95℃に保ちながら1時間かけ
て溶解した。この溶液をポリエチレンフィルム上に塗工
してポリビニルアルコールのフィルムを作製した。この
フィルムを塗工紙面および非塗工紙面上に載置し、その
上から荷重5Kg/cm2 /50℃/3分間かけて圧着
させる。このポリビニルアルコールフィルムと紙面との
境界の剥がれ状況、および強度を引張試験機にかけて測
定した。別に上記ポリビニルアルコール溶液をシャーレ
に入れ乾燥機中で乾燥させ、水分が0になるまでの時間
で乾燥性を測定した。また、ポリビニルアルコール溶液
を成紙表面に塗工し、その表面強度をRI印刷試験機に
て測定した。(表1)Example 1 100 g of polyvinyl alcohol having a saponification degree of 99, 0 mol% and a degree of polymerization of 1800, which is a raw material, was dispersed in 1000 cc of cold water in a beaker, and an equimolar amount (0.900 g of solid: 0.900 g of solids) was left in the dispersion. ) Of caustic soda was added, and the temperature was raised by heating and the temperature was kept at 95 ° C., and the mixture was dissolved over 1 hour. This solution was applied onto a polyethylene film to prepare a polyvinyl alcohol film. This film was placed into a coating paper and Hinuri Engineering on paper, is crimped over the top the load 5Kg / cm 2/50 ℃ / 3 minutes. The peeling condition of the boundary between the polyvinyl alcohol film and the paper surface and the strength were measured by a tensile tester. Separately, the polyvinyl alcohol solution was placed in a petri dish and dried in a drier, and the drying property was measured by the time until the water content became zero. Further, a polyvinyl alcohol solution was coated on the surface of the paper, and the surface strength was measured by an RI printing tester. (Table 1)
【0011】[0011]
【実施例2】原料となるけん化度98.5モル%、重合
度2500のポリビニルアルコール100gをとりビー
カー中で1000ccの冷水に分散させ、これに残存す
る酢酸基と等モル(固形0.905g)の苛性ソーダを
添加し実施例1と同様な方法で溶解した。この溶液をポ
リエチレンフィルム上に塗工してポリビニルアルコール
のフィルムを作製した。このフィルムの剥がれ状況、強
度ならびに乾燥性、表面強度を実施例1の試験方法によ
って測定した。(表1)Example 2 100 g of polyvinyl alcohol having a saponification degree of 98.5 mol% and a polymerization degree of 2500 as a raw material was dispersed in 1000 cc of cold water in a beaker and equimolar to the residual acetic acid group (solid 0.905 g). Caustic soda was added and dissolved in the same manner as in Example 1. This solution was applied onto a polyethylene film to prepare a polyvinyl alcohol film. The peeling condition, strength, drying property, and surface strength of this film were measured by the test method of Example 1. (Table 1)
【0012】[0012]
【比較例1】ポリビニルアルコールを溶解するときに苛
性ソーダを添加しなかった他は全て実施例1に準じて行
った。(表1)Comparative Example 1 The same procedure as in Example 1 was carried out except that caustic soda was not added when dissolving polyvinyl alcohol. (Table 1)
【比較例2】同様に、ポリビニルアルコールを溶解する
ときに苛性ソーダを添加しなかった他は全て実施例2に
準じて行った。(表1)Comparative Example 2 Similarly, the procedure of Example 2 was repeated except that caustic soda was not added when the polyvinyl alcohol was dissolved. (Table 1)
【表1】 [Table 1]
【0013】[0013]
【発明の効果】以上のとおり、従来完全けん化ポリビニ
ルアルコールと称せられていた高けん化物でも奏しえな
かった予想外の効果を、上記高けん化物を加熱溶解させ
るときに、未けん化の残存酢酸基と等モル量かやや過剰
の苛性ソーダを添加することに着目したことが100モ
ル%けん化物を得る要因となったのであり、こうして得
たポリビニルアルコールはフィルムの粘着性、乾燥性を
十分改良することができた。それ故、紙及び板紙の表面
に塗工することで紙の耐ブロッキング性は改善され、し
かも紙表面のパルプ繊維間の結合性がよいため表面強度
は向上し一連の紙の製造工程における種々の問題を悉く
解消出来たことは有意義なことである。即ち、塗工工程
におけるアフターロールの汚れ、印刷工程での印刷機の
ブランケット胴の汚れが激減し大きく操業性の改善を計
ることが出来た為紙及び板紙の生産性に及ぼす影響は大
きいものである。INDUSTRIAL APPLICABILITY As described above, an unexpected effect, which has not been obtained even with a highly saponified product which has been conventionally called a completely saponified polyvinyl alcohol, has an unsaponifiable residual acetic acid group when heated and dissolved. The fact that attention was paid to the addition of caustic soda in an equimolar amount or a slight excess was a factor in obtaining a 100 mol% saponified product. The polyvinyl alcohol thus obtained should sufficiently improve the tackiness and dryness of the film. I was able to. Therefore, by coating on the surface of paper and paperboard, the blocking resistance of paper is improved, and since the bond between pulp fibers on the paper surface is good, the surface strength is improved and various papers in a series of paper manufacturing processes are improved. It is significant that the problem was solved in a hurry. In other words, after roll stains in the coating process and stains on the blanket cylinder of the printing machine in the printing process were drastically reduced, and it was possible to greatly improve the operability, so the impact on the productivity of paper and paperboard is large. is there.
Claims (2)
抄紙して後、この成紙の片面または両面に表面処理剤を
塗布してなる紙及び板紙の製造方法において、表面処理
剤としてポリビニルアルコールを苛性ソーダで溶解した
液を用いて成紙の表面に塗布することを特徴とする方
法。1. A method for producing paper or paperboard, which comprises making paper stock solution containing pulp and various chemicals, and then applying a surface treatment agent to one or both sides of the papermaking material. A method characterized by applying a solution of alcohol dissolved in caustic soda to the surface of a paper.
において100モル%ケン化したポリビニルアルコール
である請求項1記載の紙及び板紙の製造方法。2. The method for producing paper and paperboard according to claim 1, wherein the polyvinyl alcohol solution is polyvinyl alcohol saponified at 100 mol% when dissolved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3728692A JPH06287891A (en) | 1992-01-28 | 1992-01-28 | Production of paper and paper board |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3728692A JPH06287891A (en) | 1992-01-28 | 1992-01-28 | Production of paper and paper board |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06287891A true JPH06287891A (en) | 1994-10-11 |
Family
ID=12493468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3728692A Pending JPH06287891A (en) | 1992-01-28 | 1992-01-28 | Production of paper and paper board |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06287891A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016199827A (en) * | 2015-04-13 | 2016-12-01 | 王子ホールディングス株式会社 | Biodegradable industrial paper |
CN107354813A (en) * | 2017-07-25 | 2017-11-17 | 滁州卷烟材料厂 | A kind of mould proof corrugated case of waterproof |
JP2019522741A (en) * | 2016-09-30 | 2019-08-15 | リペーパー インコーポレイテッド | Papermaking coating agent having environmental friendliness, water resistance and oil resistance and method for producing the same |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5488311A (en) * | 1977-12-20 | 1979-07-13 | Nippon Synthetic Chem Ind | Preventing of vessel pick of paper |
-
1992
- 1992-01-28 JP JP3728692A patent/JPH06287891A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5488311A (en) * | 1977-12-20 | 1979-07-13 | Nippon Synthetic Chem Ind | Preventing of vessel pick of paper |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016199827A (en) * | 2015-04-13 | 2016-12-01 | 王子ホールディングス株式会社 | Biodegradable industrial paper |
JP2019522741A (en) * | 2016-09-30 | 2019-08-15 | リペーパー インコーポレイテッド | Papermaking coating agent having environmental friendliness, water resistance and oil resistance and method for producing the same |
CN107354813A (en) * | 2017-07-25 | 2017-11-17 | 滁州卷烟材料厂 | A kind of mould proof corrugated case of waterproof |
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