JPH03167388A - Converted paper - Google Patents
Converted paperInfo
- Publication number
- JPH03167388A JPH03167388A JP30811989A JP30811989A JPH03167388A JP H03167388 A JPH03167388 A JP H03167388A JP 30811989 A JP30811989 A JP 30811989A JP 30811989 A JP30811989 A JP 30811989A JP H03167388 A JPH03167388 A JP H03167388A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- chitosan
- fibers
- fiber
- papermaking
- 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
- 239000000835 fiber Substances 0.000 claims abstract description 36
- 229920001661 Chitosan Polymers 0.000 claims abstract description 25
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 21
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 21
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 15
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 15
- 150000003839 salts Chemical class 0.000 claims abstract description 7
- 238000007639 printing Methods 0.000 abstract description 18
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract description 9
- 238000001035 drying Methods 0.000 abstract description 8
- 240000000907 Musa textilis Species 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 229920001131 Pulp (paper) Polymers 0.000 abstract description 4
- 238000006467 substitution reaction Methods 0.000 abstract description 4
- 150000007524 organic acids Chemical class 0.000 abstract description 3
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 abstract description 2
- 150000007522 mineralic acids Chemical class 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 abstract description 2
- 240000001832 Morus alba var. alba Species 0.000 abstract 1
- 239000002023 wood Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 25
- 239000003795 chemical substances by application Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 4
- 238000010009 beating Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000004513 sizing Methods 0.000 description 4
- 239000011122 softwood Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920003043 Cellulose fiber Polymers 0.000 description 2
- 241000238557 Decapoda Species 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229920006318 anionic polymer Polymers 0.000 description 2
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000007646 gravure printing Methods 0.000 description 2
- 239000011121 hardwood Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 229920005615 natural polymer Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 229920001059 synthetic polymer Polymers 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 244000198134 Agave sisalana Species 0.000 description 1
- 235000011624 Agave sisalana Nutrition 0.000 description 1
- 244000099147 Ananas comosus Species 0.000 description 1
- 235000007119 Ananas comosus Nutrition 0.000 description 1
- 229920002101 Chitin Polymers 0.000 description 1
- 241000238424 Crustacea Species 0.000 description 1
- 240000000249 Morus alba Species 0.000 description 1
- 235000008708 Morus alba Nutrition 0.000 description 1
- 241000234295 Musa Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 229920006184 cellulose methylcellulose Polymers 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 230000000850 deacetylating effect Effects 0.000 description 1
- 230000006196 deacetylation Effects 0.000 description 1
- 238000003381 deacetylation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 159000000011 group IA salts Chemical class 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- -1 sulfate ester groups Chemical group 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Landscapes
- Paper (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、各種の高性能印刷機で高速印刷できる和紙状
の風合いと外観を有する加工紙に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to processed paper having a Japanese paper-like texture and appearance that can be printed at high speed with various high-performance printing machines.
〔従来の技術及び発明が解決しようとする課題〕従来、
製紙用繊維を主原料として嵩高に抄造された紙は、多孔
性、軽さ、柔軟さと強靭さを併せ持ち、いわゆる和紙状
の風合いと外観が高く評価されている。しかしながら、
その印刷適性は木材パルブから緻密に抄造された印刷用
洋紙や、さらに洋紙に塗工したコート紙等の加工紙に比
べると劣っている。特に、回転印刷機や輪転印刷機にて
印刷する際の紙粉と呼ばれる紙繊維の脱落や紙むけと呼
ばれる毛羽立ちが著しく、高速印刷には不適とされてい
る。[Problems to be solved by conventional techniques and inventions] Conventionally,
Bulky paper made from papermaking fibers as the main raw material is porous, light, flexible, and tough, and is highly valued for its so-called Japanese paper-like texture and appearance. however,
Its printability is inferior to that of printing paper made precisely from wood pulp, or processed paper such as coated paper, which is coated on western paper. In particular, when printing with a rotary printing press or a rotary printing press, paper fibers called paper dust drop off and fluffing called paper peeling occurs, making it unsuitable for high-speed printing.
紙粉や紙むけの従来の防止方法としては、次のような方
法が採用されている。The following methods have been adopted as conventional methods for preventing paper dust and paper peeling.
■原料繊維や叩解度を選択して、緊度の高い締まった紙
質とする方法。この方法は、証券用紙等に採用されてい
るが、多孔性や軽さ、柔軟さ等いわゆる和紙風の風合い
、外観が失われるという問題点がある。■A method of selecting raw material fibers and beatability to create a tight and tight paper quality. This method is used for securities paper, etc., but there is a problem in that the so-called Japanese paper-like texture and appearance, such as porosity, lightness, and flexibility, are lost.
■スーパーカレンダー処理等の熱圧ロールを用いて処理
する方法。この方法も上記■と同様の問題点がある。■A method of processing using a hot pressure roll such as super calender processing. This method also has the same problems as the above (2).
■無機粉末等の填料と合成ラテックス等のバインダーを
混合塗布又は含浸する方法。この方法では、′特に多孔
性が失われるとともに、和紙と異質の外観に変化すると
いう問題点がある。■A method of mixing or impregnating a filler such as inorganic powder with a binder such as synthetic latex. This method has the problem that, in particular, porosity is lost and the appearance changes to that of Japanese paper.
■でんぷんやキトサン等の天然高分子を付着させる方法
。この方法は、付着量が多いと上記■と同様の問題点を
生じ、少ないと効果が小さいという問題点がある。■Method of attaching natural polymers such as starch and chitosan. This method has the problem that if the amount of adhesion is large, the same problem as described in (2) above occurs, and if the amount of adhesion is too small, the effect is small.
なお、紙の表面塗工用組成物として、キトサン水溶液と
カルボキシメチルセルロース等のセルロース誘導体等と
を含有するものがあるが(特開昭64−14396号公
報)、これはキトサンのカチオンとカルボキシメチルセ
ルロースのアニオンのイオン的作用で凝集して凝固体が
生或するという問題点がある。また、このカルポキシメ
チルセルロースは水溶液を形成するもので、繊維を形成
するものではない。Note that there is a composition for coating the surface of paper that contains an aqueous chitosan solution and a cellulose derivative such as carboxymethyl cellulose (Japanese Patent Application Laid-open No. 14396/1983); There is a problem in that coagulation occurs due to the ionic action of anions. Further, this carboxymethyl cellulose forms an aqueous solution and does not form fibers.
本発明の目的は、製紙用繊維を主原料として、多孔性、
軽さ及び柔軟性等の和紙状の風合いと外観を保持したま
ま、回転印刷機や輪転式印刷機による印刷で紙粉や紙む
けが発生しないように繊維間がしっかりと結合した加工
紙を提供することにある。The purpose of the present invention is to use papermaking fibers as the main raw material to create porous,
We provide processed paper that maintains the texture and appearance of washi paper, such as lightness and flexibility, and has fibers that are tightly bonded to prevent paper dust and paper peeling from occurring when printing with a rotary printing machine or rotary printing machine. It's about doing.
上記問題点を解決するために、本発明では靭皮繊維と葉
繊維とから選ばれた1種以上の製紙用繊維と、少量の繊
維状水不溶性力ルボキシメチルセルロース又はその塩と
を必須成分とする紙であって、少なくとも印刷面にキト
サン含有物を付着させてなるという手段を採用している
。In order to solve the above problems, the present invention uses one or more types of papermaking fibers selected from bast fibers and leaf fibers, and a small amount of fibrous water-insoluble carboxymethyl cellulose or its salt as essential components. This paper employs a method in which chitosan-containing material is attached to at least the printing surface.
次に、上記各構戊について、詳細に説明する。Next, each of the above components will be explained in detail.
靭皮繊維としては、三極、格、雁皮、桑等の木本性靭皮
から得られたパルプ状繊維が好ましい。The bast fibers are preferably pulp-like fibers obtained from woody basts such as Sanpoku, Kaku, Gampi, and Mulberry.
この靭皮繊維は、和紙状の中でも独特の風合いや外観、
繊維光沢とともに、高度な強靭さを紙に付与することが
できる。This bast fiber has a unique texture and appearance even among Japanese paper-like materials.
It can impart a high degree of toughness to paper as well as fiber luster.
葉繊維としては、マニラ麻、サイザル麻、バナナ、パイ
ナップル等から得られたパルプ状繊維が好ましい。この
葉繊維は、多孔性、軽さ、柔軟性と適度の強靭性を紙に
付与する。As the leaf fiber, pulp fibers obtained from Manila hemp, sisal hemp, banana, pineapple, etc. are preferred. These leaf fibers provide paper with porosity, lightness, flexibility and moderate toughness.
上記靭皮繊維と葉繊維の紙中に占める重量割合は、高い
ほど上記の特長を紙質に付与するが、通常価格も高くな
る。この重量割合が20重量%以上であれば、その比率
に応じて風合い、外観、その他の紙質が付与される。こ
の割合が低い場合には、その他の製紙用繊維として、木
材パルプ又はセルロース系化学繊維が通常混用される。The higher the weight ratio of the bast fibers and leaf fibers in the paper, the more the above-mentioned features will be imparted to the paper quality, but the price will also usually be higher. If this weight ratio is 20% by weight or more, texture, appearance, and other paper qualities will be imparted depending on the ratio. When this ratio is low, wood pulp or cellulose-based chemical fibers are usually mixed as other papermaking fibers.
次に、繊維状水不溶性カルボキシメチルセルロース又は
その塩としては、置換度が0.5未満のものが好ましく
、水に分散してから再乾燥しても繊維形態を失わないも
のが好適である。セルロース素原料は、針葉樹、広葉樹
、マニラ麻等があるが、細いセルロース繊維から製造さ
れたものが好適である。この繊維状水不溶性力ルボキシ
メチルセルロース又はその塩は、含有比率をあまり高く
することは好ましくなく、2〜20重量%の範囲が好適
である。20重量%を越えると風合い、外観に変化が現
れ、和紙状から異なってくるようになり、2重量%未満
ではその効果が少ない。3〜lO重量%の範囲が特に好
ましい。Next, as the fibrous water-insoluble carboxymethyl cellulose or its salt, one having a degree of substitution of less than 0.5 is preferable, and one that does not lose its fibrous form even if it is re-dried after being dispersed in water is preferable. Cellulose raw materials include softwood, hardwood, Manila hemp, etc., but those made from thin cellulose fibers are preferred. The content of this fibrous water-insoluble carboxymethylcellulose or its salt is not preferably too high, and is preferably in the range of 2 to 20% by weight. If it exceeds 20% by weight, the texture and appearance will change, and it will start to look different from Japanese paper. If it is less than 2% by weight, the effect will be small. A range of 3 to 10% by weight is particularly preferred.
次に、キトサンはカニ、エビ等の甲殻類の外殻から酸、
アルカリ処理等で得られたキチンを脱アセチル処理して
得られるものである。色相が白色で不溶解物が含まれな
いものが良い。粘度や脱アセチル化度により効果に差が
あるが、付着量の調整により殆ど補正が可能である。キ
トサンは無機酸又は有機酸の水溶液に溶解して紙に付着
させる。Next, chitosan is extracted from acid from the outer shells of crustaceans such as crabs and shrimp.
It is obtained by deacetylating chitin obtained by alkali treatment or the like. It is preferable that the color is white and does not contain any insoluble matter. Although the effect varies depending on the viscosity and degree of deacetylation, most of the effects can be corrected by adjusting the amount of adhesion. Chitosan is dissolved in an aqueous solution of an inorganic or organic acid and applied to the paper.
溶媒としては、蟻酸、酢酸、グリコール酸等の有機酸の
水溶,液が好ましい。また、酢酸水溶液に溶解した市販
品も使用することができる。As the solvent, an aqueous solution or liquid of an organic acid such as formic acid, acetic acid, or glycolic acid is preferable. Moreover, a commercially available product dissolved in an acetic acid aqueous solution can also be used.
キトサン含有物の付与は、キトサンの酸性水溶液の含浸
又は塗布により行う。紙が多孔質であるとキトサン溶液
を一方の面から塗布しても紙層内に拡散する。従って、
少なくとも一方の面に均一に塗布すれば通常目的は達成
される。塗布又は含漫の方法及び装置は紙用として公知
のものが紙の構造や紙質に応じて使用できる。乾燥の終
了した紙については、浸漬法、スプレー法、キスロール
法、カーテンコート法等の方法が採用され、乾燥終了前
に塗布する場合にはスプレー法、サイズプレスやその他
のインラインコー夕を使用することができる。キトサン
の溶液濃度は、目標付着量や付与方法によって適宜選択
されるが、通常は5重量%以下である。The chitosan-containing material is applied by impregnation or coating with an acidic aqueous solution of chitosan. If the paper is porous, the chitosan solution will diffuse into the paper layer even if applied from one side. Therefore,
A uniform application on at least one side will usually accomplish the purpose. As the coating or impregnating method and apparatus, known methods for paper can be used depending on the structure and quality of the paper. For paper that has finished drying, methods such as the dipping method, spray method, kiss roll method, curtain coating method, etc. are adopted, and when coating before the drying is completed, the spray method, size press, and other in-line coaters are used. be able to. The concentration of chitosan in the solution is appropriately selected depending on the target deposition amount and application method, but is usually 5% by weight or less.
キトサン含有物の付着量は紙重量の0. 1〜4.0重
量%が好ましく、0.4〜2.0重量%の範囲が紙粉及
び紙むけの防止効果と多孔性や柔軟性を含む触感の保持
の両立の点からさらに好ましい。The adhesion amount of the chitosan-containing material is 0.0% of the weight of the paper. The range is preferably 1 to 4.0% by weight, and more preferably 0.4 to 2.0% by weight in terms of both the effect of preventing paper dust and paper peeling and the maintenance of tactile sensation including porosity and flexibility.
次に、水溶性アニオン性高分子物としては、天然高分子
の誘導体と合成高分子の誘導体がある。Next, water-soluble anionic polymers include derivatives of natural polymers and derivatives of synthetic polymers.
前者にはカルボキシメチルセルロースやカルボキシメチ
ルデンプン等の多糖類のカルボキシメチル誘導体やその
アルカリ塩が好適である。合成高分子誘導体には、ビニ
ル系やポリアクリル系高分子でカルボキシル基、硫酸エ
ステル基、スルホン酸基、リン酸基等で変性された水溶
性物質があげられ、具体的にはカルボキシル変性ポリア
クリルアミドやポリビニルアルコール硫酸エステル等の
アルカリ塩を使用することができる。最も好適なものと
しては、置換度0. 5〜1.2のカルボキシメチルセ
ルロースのナトリウム塩であって、濃度0. 5〜2.
0%の安定な水溶液が容易に調製できるものがよい。For the former, carboxymethyl derivatives of polysaccharides such as carboxymethyl cellulose and carboxymethyl starch and their alkali salts are suitable. Synthetic polymer derivatives include water-soluble substances such as vinyl and polyacrylic polymers modified with carboxyl groups, sulfate ester groups, sulfonic acid groups, phosphoric acid groups, etc. Specifically, carboxyl-modified polyacrylamide Alkaline salts such as polyvinyl alcohol sulfate and polyvinyl alcohol sulfate can be used. The most preferred one is a degree of substitution of 0. 5 to 1.2 sodium salt of carboxymethyl cellulose, the concentration of which is 0. 5-2.
It is preferable that a stable 0% aqueous solution can be easily prepared.
この水溶性アニオン性高分子物は、できるだけ低粘度に
希釈した水溶液を均一に混合するように攪拌しながら添
加するのが好ましい。さらに、例えば添加場所を混合槽
から抄網にスラリーが流送される間に設定し、定量ポン
プで添加すると効果的である。添加量は、キトサン酸性
水溶液を含有するスラリーに対して固形分比率で0.
1〜5.0が好ましく、0.2〜2.0がさらに好まし
い。この比率が0. 1未満の場合には表面強さの向上
効果が少なく、5.0を越えてもそれ以上効果は向上し
ない。This water-soluble anionic polymer is preferably added while stirring an aqueous solution diluted to have as low a viscosity as possible so as to mix uniformly. Further, for example, it is effective to set the addition location while the slurry is flowing from the mixing tank to the paper screen and add it using a metering pump. The amount added is 0.0% in terms of solid content ratio to the slurry containing the chitosan acidic aqueous solution.
1 to 5.0 is preferable, and 0.2 to 2.0 is more preferable. This ratio is 0. When it is less than 1, the effect of improving surface strength is small, and even when it exceeds 5.0, the effect is not improved any further.
次に、加工紙の製造方法について説明する。Next, a method for manufacturing processed paper will be explained.
まず、製紙用繊維を要求される紙質に応じて叩解し、水
分散スラリーとする。次に、混合槽にさらに少量の繊維
状水不溶性カルボキシメチルセルロース又はその塩及び
必要に応じて添加薬品を混合し、抄紙機を用いて抄紙、
乾燥する。乾燥後又は半乾燥状態にて、キトサン溶液を
添加した後、乾燥する。First, papermaking fibers are beaten according to the required paper quality to form a water-dispersed slurry. Next, a small amount of fibrous water-insoluble carboxymethyl cellulose or its salt and additive chemicals as needed are mixed in the mixing tank, and paper is made using a paper machine.
dry. After drying or in a semi-dry state, a chitosan solution is added and then dried.
靭皮繊維は繊維長が長く、叩解作業でもつれて結束を生
じやすいことと、低叩解でも高強度が得られるので、殆
ど叩解せずに使用するのがよい。Bast fibers have a long fiber length and are easily tangled and bound during beating, and high strength can be obtained even with low beating, so it is best to use them without beating.
葉繊維は軽く叩解するか又は分散だけで済ませるか、要
求される紙質に応じて処理する。木材パルプを混用する
ときには、これは必要に応じて任意に叩解する。多孔性
を重視する紙質の場合には、針葉樹パルプを軽く叩解し
て使用するとよい。Leaf fibers may be lightly beaten or simply dispersed, or processed depending on the required paper quality. When wood pulp is used, it is optionally beaten if necessary. In the case of paper where porosity is important, softwood pulp may be used after being lightly beaten.
繊維状水不溶性力ルボキシメチルセルロース又はその塩
は水中で良く攪拌して分散させる。湿潤強力剤を使用す
る場合には、上記力ルボキシメチルセルロースと凝集す
る傾向のあるものが多いので、カチオン性ができるだけ
弱いものを少量使用するのがよい。この湿潤強力剤とし
てポリアミドアミン・エビクロルヒドリンクイプ等のカ
チオン性の強いものは、全セルロース繊維のl%以内の
添加量が適当である。なお、紙へのキトサン酸性溶液の
塗布をコンベアネット上でスプレーコータを用いて行う
ような場合や、高濃度溶液を片面から少量塗布してコン
ベアドライヤーやシリンダードライヤーで乾燥する場合
等には湿潤強力剤は必ずしも必要ではない。The fibrous water-insoluble carboxymethylcellulose or its salt is thoroughly stirred and dispersed in water. When using a wet strength agent, it is preferable to use a small amount of a wet strength agent whose cationic property is as weak as possible, since many of them tend to aggregate with the above-mentioned carboxymethyl cellulose. As the wet strength agent, a strong cationic agent such as polyamide amine/ebichlorohydrin type is suitably added in an amount within 1% of the total cellulose fibers. In addition, when applying a chitosan acidic solution to paper using a spray coater on a conveyor net, or when applying a small amount of a highly concentrated solution to one side and drying it with a conveyor dryer or cylinder dryer, use a high-wetting agent. agent is not necessarily required.
サイズ剤は、インキや印刷機の条件によっては、ロジン
系や中性サイズ剤等の公知のものを使用する。その他、
消泡剤やドライヤー剥離剤等の公知の抄紙用添加剤を使
用することができる。As the sizing agent, a known sizing agent such as a rosin-based sizing agent or a neutral sizing agent may be used depending on the conditions of the ink and the printing machine. others,
Known papermaking additives such as antifoaming agents and dryer release agents can be used.
抄紙機は円網式や短網式が好適である。洋紙で通常使用
される長網式は、靭皮繊維が混用される場合や葉繊維が
多量に混用される場合には適当ではない。乾燥は、シリ
ンダードライヤー、熱風ドライヤー等の紙製造及び紙加
工用ドライヤーが通常の乾燥温度範囲で使用できる。The paper machine is preferably a cylinder type or a short screen type. The fourdrinier method normally used for Western paper is not suitable when bast fibers are mixed or when leaf fibers are mixed in large quantities. For drying, dryers for paper manufacturing and paper processing such as cylinder dryers and hot air dryers can be used within the normal drying temperature range.
〔実施例1〜3及び比較例1〜3〕
以下に本発明を具体化した実施例を比較例と対比して説
明する。[Examples 1 to 3 and Comparative Examples 1 to 3] Examples embodying the present invention will be described below in comparison with comparative examples.
まず、水酸化ナトリウムを用いて加圧蒸解し、次亜塩素
酸ナトリウムで漂白したマニラ麻パルプに広葉樹パルプ
から製造した置換度0.33の水不溶性繊維状カルボキ
シメチルセルロースを0及び10重量%配合して、重さ
40g/m”の手抄きシートをTAPPI T205
US−71に従って作成した。First, Manila hemp pulp that had been pressure-cooked with sodium hydroxide and bleached with sodium hypochlorite was blended with 0 and 10% by weight of water-insoluble fibrous carboxymethyl cellulose with a degree of substitution of 0.33 produced from hardwood pulp. , a handmade sheet with a weight of 40g/m" is made using TAPPI T205
Prepared according to US-71.
シートの乾燥は、表面温度120°のクロムメッキドラ
ムドライヤーに貼付けて行った。The sheet was dried by attaching it to a chrome-plated drum dryer with a surface temperature of 120°.
一方、精製キトサンを等量のグリコール酸とイオン交換
水とに、重量濃度2%になるように混合溶解した。これ
を適宜希釈して手抄きシ一トにスプレー塗布し、表面温
度120℃のクロムメッキドラムドライヤー上で乾燥し
てキトサンの付着量が0. 5、1. O、2.0重量
%の加工紙を作製した。On the other hand, purified chitosan was mixed and dissolved in equal amounts of glycolic acid and ion-exchanged water to give a weight concentration of 2%. This was diluted appropriately, sprayed onto a handmade sheet, and dried on a chrome-plated drum dryer with a surface temperature of 120°C until the amount of chitosan deposited was 0. 5, 1. Processed paper containing 2.0% by weight of O was prepared.
この加工紙について、密度、裂断長、湿裂断長、クレム
法吸水度(JIS P8141)、インキサイズ度、
ワックス法表面強さを測定し、その結果を表−1及び表
−2に示した。Regarding this processed paper, density, tear length, wet tear length, Klemm method water absorption (JIS P8141), ink size,
The wax method surface strength was measured and the results are shown in Tables 1 and 2.
密度はJIS P8118に定められた試験法によっ
て測定した。本発明のように主として有機繊維質原料で
構成され、繊維以外の成分が微量の和紙風の紙では、多
孔性をこの密度の値で判定することができ、0.5g/
ml以下が好ましい。この密度で良好な印刷適性のある
紙が得られる。The density was measured by the test method specified in JIS P8118. In the case of washi-like paper, which is mainly composed of organic fibrous raw materials and has a trace amount of components other than fibers, as in the present invention, the porosity can be determined by this density value, which is 0.5 g/
ml or less is preferable. This density gives a paper with good printability.
裂断長、湿裂断長は、JIS P8113に従って行
った。The tear length and wet tear length were determined according to JIS P8113.
クレム吸水度は、JIS P8141に従って行った
。Clem's water absorption was measured according to JIS P8141.
インキサイズは、水性インキの液面に紙を浮かべ、イン
キが反対面に浸透して反対面の面積の2/3を占めるま
での時間(秒)で表示した。紙のドライヤー接触面と非
接触面の各々をインキ液面に浮かべて測定し、その平均
値を用いた。The ink size was expressed as the time (seconds) required for the paper to float on the surface of the water-based ink and for the ink to penetrate into the opposite surface and occupy 2/3 of the area of the opposite surface. The dryer contact surface and non-contact surface of the paper were each floated on the ink liquid surface and measured, and the average value was used.
ワックス法表面強度は、JIS P8129に定めら
れた試験法によって測定した。少なくとも12A、好ま
しくは13A以上が高性能印刷機に適している。The wax method surface strength was measured by the test method specified in JIS P8129. At least 12A, preferably 13A or more is suitable for high performance printing presses.
なお、CMCはカルボキシメチルセルロースを表す。In addition, CMC represents carboxymethyl cellulose.
表一
l
表−2
上記表−1及び表−2からわかるように、繊維状CMC
及びキトサンの双方を含有しない場合(比較例l)、繊
維状CMCを含有しない場合(比較例2)及びキトサン
を含有しない場合(比較例3)では、乾湿裂断長、ワッ
クス法表面強度等の性能が悪いのに対し、繊維状CMC
とキトサンを併用した場合(実施例l〜3)では、乾湿
裂断長が改善され、しかもワックス法表面強度が顕著に
改善される。特に、公知のキトサン含浸法による加工紙
である比較例2と比べ、同一付着量、同一密度で表面強
さが大きく、従って吸水性は同レベルでありながら、イ
ンキのにじみ防止効果がある。従って、グラビア印刷等
の多色印刷でも紙むけ発生のない、多孔性の割りには比
較的鮮明な印刷が可能である。Table 1 l Table 2 As can be seen from Table 1 and Table 2 above, fibrous CMC
In the case of not containing both CMC and chitosan (Comparative Example 1), the case of not containing fibrous CMC (Comparative Example 2), and the case of not containing chitosan (Comparative Example 3), the dry and wet tear length, wax method surface strength, etc. Fibrous CMC has poor performance, whereas fibrous CMC
When chitosan is used in combination (Examples 1 to 3), the dry and wet tear length is improved, and the wax method surface strength is also significantly improved. In particular, compared to Comparative Example 2, which is a processed paper processed by the known chitosan impregnation method, the surface strength is greater at the same adhesion amount and the same density, and therefore the water absorbency is at the same level, yet the ink bleed prevention effect is achieved. Therefore, even in multi-color printing such as gravure printing, relatively clear printing is possible despite the porosity, without paper peeling.
〔実施例4〕
前記実施例lと同一のマニラ麻パルプ及び晒針葉樹パル
プを使用し、後者はビーターを用いて叩解度18°SR
まで叩解し、マニラ麻パルプ:針葉樹パルプ=70:3
0の混合比で濃度0.3%の水性スラリーを容器内で調
製した。[Example 4] The same manila hemp pulp and bleached softwood pulp as in Example 1 were used, and the latter was beaten to a beating degree of 18°SR using a beater.
Manila hemp pulp: Softwood pulp = 70:3
An aqueous slurry with a mixing ratio of 0.3% and a concentration of 0.3% was prepared in a container.
このスラリーに実施例lで使用した水不溶性繊維状カル
ボキシメチルセルロースを上記パルプ合計量の1/9量
加えて良く攪拌し、均一に混合して円網ヤンキー式抄紙
機で重さ50g/m2の紙を抄造した。この紙をネット
コンベアー式乾燥機と直結したスプレーコーターを使用
して実施例1で使用したキトサン溶液を2倍に希釈して
塗布し、110℃で熱風乾燥した。The water-insoluble fibrous carboxymethyl cellulose used in Example 1 was added to this slurry in an amount of 1/9 of the total amount of the above pulp, stirred well, and mixed uniformly. was made into paper. The chitosan solution used in Example 1 was diluted twice and applied to this paper using a spray coater directly connected to a net conveyor dryer, and then dried with hot air at 110°C.
その結果、キトサン付着量は0.8%であった。As a result, the amount of chitosan attached was 0.8%.
得られた加工紙は多孔性を失わず、ワックス注表面強さ
が14Aで、連続グラビア印刷を施しても全く紙むけを
生じなかった。The resulting processed paper did not lose its porosity, had a wax-poured surface strength of 14A, and did not peel at all even after continuous gravure printing.
本発明の加工紙は、製紙用繊維を主原料として、多孔性
、軽さ及び柔軟性等の和紙状の風合いと外観を良好に保
持したまま、回転印刷機、輪転式印刷機等による印刷で
紙粉や紙むげが発生しないように繊維間が十分に結合し
ているという効果を奏する。The processed paper of the present invention is made from papermaking fibers as the main raw material, and can be printed using a rotary printing press, a rotary printing press, etc., while retaining the texture and appearance of Japanese paper, such as porosity, lightness, and flexibility. The effect is that the fibers are sufficiently bonded to prevent paper dust and paper peeling from occurring.
Claims (1)
繊維と、少量の繊維状水不溶性カルボキシメチルセルロ
ース又はその塩とを必須成分とする紙であって、少なく
とも印刷面にキトサン含有物を付着させてなる加工紙。1. Paper whose essential components are one or more types of papermaking fibers selected from bast fibers and leaf fibers, and a small amount of fibrous water-insoluble carboxymethyl cellulose or its salt, and which contains chitosan on at least the printed surface. Processed paper made by adhering things to it.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30811989A JPH03167388A (en) | 1989-11-27 | 1989-11-27 | Converted paper |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30811989A JPH03167388A (en) | 1989-11-27 | 1989-11-27 | Converted paper |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03167388A true JPH03167388A (en) | 1991-07-19 |
Family
ID=17977105
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP30811989A Pending JPH03167388A (en) | 1989-11-27 | 1989-11-27 | Converted paper |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03167388A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08179546A (en) * | 1994-10-27 | 1996-07-12 | Canon Inc | Recording paper and image forming method using same |
US5827610A (en) * | 1997-01-10 | 1998-10-27 | E. I. Du Pont De Nemours And Company | Chitosan-coated pulp, a paper using the pulp, and a process for making them |
JP2011052354A (en) * | 2009-09-03 | 2011-03-17 | Toukin Inc | Method for producing three-dimensionally formed article of japanese paper, and three-dimensionally formed article of japanese paper |
-
1989
- 1989-11-27 JP JP30811989A patent/JPH03167388A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08179546A (en) * | 1994-10-27 | 1996-07-12 | Canon Inc | Recording paper and image forming method using same |
US5827610A (en) * | 1997-01-10 | 1998-10-27 | E. I. Du Pont De Nemours And Company | Chitosan-coated pulp, a paper using the pulp, and a process for making them |
US6139688A (en) * | 1997-01-10 | 2000-10-31 | E. I. Dupont De Nemours And Company | Chitosan-coated pulp a paper using the pulp, and a process for making them |
JP2011052354A (en) * | 2009-09-03 | 2011-03-17 | Toukin Inc | Method for producing three-dimensionally formed article of japanese paper, and three-dimensionally formed article of japanese paper |
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