JP2858665B2 - Transfer paper for electrophotography - Google Patents
Transfer paper for electrophotographyInfo
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- JP2858665B2 JP2858665B2 JP10635090A JP10635090A JP2858665B2 JP 2858665 B2 JP2858665 B2 JP 2858665B2 JP 10635090 A JP10635090 A JP 10635090A JP 10635090 A JP10635090 A JP 10635090A JP 2858665 B2 JP2858665 B2 JP 2858665B2
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- transfer paper
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Description
【発明の詳細な説明】 [産業上の利用分野] 本発明は電子写真用転写紙に関する。更に詳しくは、
本発明はトナーの熱定着を行う電子写真式複写機に用い
られる転写紙の複写機での走行性と作業性が良好な転写
紙に関する。Description: TECHNICAL FIELD The present invention relates to an electrophotographic transfer paper. More specifically,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer paper which is used in an electrophotographic copying machine for performing heat fixing of toner and has good running properties and workability in the copying machine.
[従来の技術] 電子写真式複写機に用いられる転写紙には複写機での
走行性と作業性が良好で、とりわけトナーを転写した数
に発生するカールの小さいことが要求される。2. Description of the Related Art Transfer paper used in an electrophotographic copying machine is required to have good running property and workability in the copying machine, and particularly to have a small curl generated in the number of transferred toners.
電子写真式複写機では転写紙にトナーで画像を形成し
た後にトナーを紙の上に定着させる為に加熱圧着させる
方式が採用されているが、この温度は通常180℃以上で
ある。即ち転写紙はトナーでの画像形成後、高温に各熱
された金属ロールと弾性ロールの間を加圧状態で通過さ
せられる。この際転写紙は加熱や加圧による乾燥や収縮
等の複雑なメカニズムでカールが発生する。An electrophotographic copying machine employs a method in which an image is formed on transfer paper with a toner and then heated and pressed to fix the toner on the paper. The temperature is usually 180 ° C. or higher. That is, the transfer paper is passed under pressure between the metal roll and the elastic roll, each of which is heated to a high temperature, after forming the image with the toner. At this time, the transfer paper is curled by a complicated mechanism such as drying or shrinking by heating or pressing.
従来転写紙の原料としては転写紙の複写機での走行性
や作業性の点から広葉樹晒パルプ等のバージンパルプが
主として用いられてきたが、近年社会的要請によって転
写紙の原料として新聞用紙、雑誌用紙等の機械パルプを
含有した古紙再生パルプが用いられる様になってきた。
しかしながら、機械パルプを含有した古紙再生パルプを
配合すると機械パルプに含まれるリグニンの為に転写紙
の各関係湿度における平衡水分が高くなり転写紙の複写
後のカールが大きくなって走行性や作業性が悪くなり、
時として複写が不可能になるという問題があった。Conventionally, virgin pulp such as hardwood bleached pulp has been mainly used as a raw material of transfer paper from the viewpoint of runnability and workability of the transfer paper in a copying machine. Recycled pulp containing mechanical pulp such as magazine paper has come to be used.
However, when recycled paper pulp containing mechanical pulp is blended, the equilibrium moisture at each relative humidity of the transfer paper increases due to the lignin contained in the mechanical pulp, and the curl after copying of the transfer paper increases, resulting in runnability and workability. Gets worse,
There has been a problem that copying is sometimes impossible.
[発明が解決しようとする課題] かかる現状に鑑み、本発明者は紙の一定湿度における
平衡水分とカールの発生機構との関係および紙の平衡水
分がどのような因子によって決定されるかについて鋭意
研究した結果、平衡水分が高くなるほど複写後のカール
が大きくなり、紙を構成するパルプ中の微細繊維が多く
なるほど平衡水分が高くなること、即ち紙を構成するパ
ルプ中の微細繊維の量を減らすほど高湿度での平衡水分
が低下して、転写紙を高湿度下に長時間放置しても複写
後のカールが小さくなることを見出し本発明を完成する
に至った。[Problems to be Solved by the Invention] In view of the present situation, the present inventors have earnestly studied the relationship between equilibrium moisture at a constant humidity of paper and the mechanism of curl generation and what factors determine the equilibrium moisture of paper. As a result of research, the higher the equilibrium moisture, the greater the curl after copying, and the more fine fibers in the pulp that makes up the paper, the higher the equilibrium moisture, that is, the amount of fine fibers in the pulp that makes up the paper is reduced. The present inventors have found that the equilibrium moisture at a high humidity decreases, and the curl after copying becomes small even when the transfer paper is left under the high humidity for a long time, thereby completing the present invention.
従って、本発明の目的は転写紙を高湿度下に長時間放
置しても電子写真式複写機において複写後のカールが小
さく、走行性及び作業性が極めて良好な電子写真式転写
紙を提供することにある。尚、転写紙としては枚葉のも
のだけではなく、連続伝票形式のものも含む。Accordingly, an object of the present invention is to provide an electrophotographic transfer sheet which has a small curl after copying in an electrophotographic copy machine and has extremely excellent running properties and workability even when the transfer sheet is left under high humidity for a long time. It is in. It should be noted that the transfer paper includes not only a single sheet but also a continuous slip type.
[課題を解決するための手段] 本発明は、転写紙(ただし、コロイダルシリカを含有
するものを除く)を構成するパルプの数平均繊維長が0.
43mm以上、および0.1mm以下の微細繊維の数の割合が33
%以下であることを特徴とする電子写真用転写紙によっ
て構成されている。[Means for Solving the Problems] In the present invention, the number average fiber length of pulp constituting transfer paper (excluding those containing colloidal silica) is 0.5.
The ratio of the number of fine fibers of 43 mm or more and 0.1 mm or less is 33
% Or less, which is constituted by electrophotographic transfer paper.
本発明で用いられる原料パルプの数平均繊維長および
平衡水分の測定は次の方法によった。The number average fiber length and the equilibrium moisture of the raw pulp used in the present invention were measured by the following methods.
数平均繊維長の測定方法 従来、パルプの繊維長分布は重量分布として測定され
るのが普通であるが、重量分布の場合全体の繊維長分布
への微細繊維の影響が非常に小さい為に、本発明のよう
に紙の平衡水分に重要な影響を与える微細繊維の量を評
価する目的には用をなさないので、微細繊維量を敏感に
測定できる数平均繊維長分布測定法を採用した。Measurement method of number average fiber length Conventionally, fiber length distribution of pulp is usually measured as weight distribution, but in the case of weight distribution, the effect of fine fibers on the whole fiber length distribution is very small, Since the present invention is not used for the purpose of evaluating the amount of the fine fiber which has an important influence on the equilibrium moisture of the paper as in the present invention, a number average fiber length distribution measuring method capable of sensitively measuring the amount of the fine fiber was employed.
繊維長分布を測定する方法に特に制限はないが、例へ
ばパルプ繊維をスライドグラス上に分散した後固定し、
顕微鏡観察によりその数平均繊維長分布を求める方法、
パルプの希薄溶液を毛細管に導き光学系を介して電気的
にその数平均繊維長分布を計測する装置(Fiber Size A
nalyzer、FS−200、フィンランド国、Kajaani社製)等
を用いることができる。顕微鏡観察による数繊維長分布
の測定結果は信頼性は高いが、測定に非常に手間と時間
を要する為本発明では市販の繊維長分布測定器(Fiber
Size Analyzer、FS−200、Kajaani社製)を用いた。There is no particular limitation on the method of measuring the fiber length distribution, but for example, pulp fibers are fixed after being dispersed on a slide glass,
A method of obtaining the number average fiber length distribution by microscopic observation,
A device that guides a dilute solution of pulp into a capillary tube and electrically measures the number average fiber length distribution through an optical system (Fiber Size A)
nalyzer, FS-200, Kajaani, Finland) and the like can be used. Although the measurement result of the number fiber length distribution by microscopic observation is highly reliable, the measurement requires a lot of trouble and time, so in the present invention, a commercially available fiber length distribution measuring instrument (Fiber
Size Analyzer, FS-200, manufactured by Kajaani) was used.
水分の測定方法 転写紙を温度20℃、関係湿度65%の環境下で12時間調
湿した後、JIS P−8127に従って水分を測定する。Moisture measurement method After the transfer paper is conditioned for 12 hours in an environment of a temperature of 20 ° C and a relative humidity of 65%, the moisture is measured according to JIS P-8127.
本発明の原料パルプの数平均繊維長を0.43mm以上、か
つ長さが0.1mm以下の繊維の数の割合を33%以下にする
方法に特に制限はないが、第一の方法は抄紙の前段階に
おいてパルプ懸濁液中から微細繊維を選択的に取り除く
方法であり、例えば洗浄工程においてワイヤーメッシュ
を大きくしたり、洗浄水量を多くしたり、或いはスクリ
ーンを用いて微細繊維を取り除くことによって目的を達
成することができる。The method of making the number average fiber length of the raw pulp of the present invention 0.43 mm or more and the ratio of the number of fibers having a length of 0.1 mm or less to 33% or less is not particularly limited. It is a method of selectively removing fine fibers from the pulp suspension at the stage, for example, by enlarging the wire mesh in the washing step, increasing the amount of washing water, or removing the fine fibers using a screen, the purpose is to remove Can be achieved.
第二の方法は抄紙工程において比較的微細繊維の濃度
の高いマシン白水の一部を取り除く方法であり、少なく
とも白水量の5%以上を取り除くことにより目的を達成
することができる。The second method is a method of removing a part of the machine white water having a relatively high concentration of fine fibers in the paper making process. The objective can be achieved by removing at least 5% or more of the white water amount.
上記のような方法で、パルプの数平均繊維長および微
細繊維の量を調節して、即ちパルプの数平均繊維長を0.
43mm以上で、かつ0.1mm以下の微細繊維の数の割合を33
%以下にコントロールすることによって、複写機での走
行性並びに作業性が良好な転写紙が得られる。By the method as described above, the number average fiber length of the pulp and the amount of fine fibers are adjusted, that is, the number average fiber length of the pulp is adjusted to 0.
The ratio of the number of fine fibers of 43 mm or more and 0.1 mm or less is 33
%, It is possible to obtain a transfer paper having good running and workability in a copying machine.
本発明で用いられる原料パルプとしては広葉樹晒パル
プ、針葉樹晒パルプ及び脱墨古紙パルプ或いはこれらの
混合パルプが所望に応じて適宜使用される。特に、脱墨
古紙パルプとして機械パルプを含有した新聞古紙、雑誌
古紙の再生パルプを使用した場合本発明の作用効果は顕
著である。As the raw material pulp used in the present invention, bleached hardwood pulp, softwood bleached pulp, deinked waste paper pulp, or a mixed pulp thereof may be used as appropriate. In particular, the effect of the present invention is remarkable when recycled pulp of used newspaper or magazine containing pulp containing mechanical pulp is used as deinked used pulp.
更に、本発明は公知の抄紙用薬品と抄紙機で製造され
る転写紙に応用される。Further, the present invention is applied to known papermaking chemicals and transfer paper manufactured by a paper machine.
[実施例] 以下に実施例を挙げて本発明をより具体的に説明する
が、勿論本発明はこれによって限定されるものではな
い。EXAMPLES Hereinafter, the present invention will be described more specifically with reference to Examples, but of course, the present invention is not limited thereto.
実施例1および実施例2 パルプ原料としてフリーネス410ml(C.S.F.カナダ標
準フリーネス)まで叩解した広葉樹晒パルプ(LBKP)を
用い、実施例1ではこのパルプをバードスクリーン(ス
リット幅0.2mm)によって長繊維と微細繊維とに分別
し、長繊維分をアクセプトパルプとして抄紙主原料と
し、これに微細繊維分を全パルプの20重量%抄紙系外へ
排出した残りを加えて用い、次の抄紙薬品および填料を
パルプ当たり絶乾表示で添加して紙料とした。Example 1 and Example 2 Hardwood bleached pulp (LBKP) beaten to a freeness of 410 ml (CSF Canadian Standard Freeness) was used as a pulp raw material. In Example 1, the pulp was converted to long fibers and fine fibers using a bird screen (slit width 0.2 mm). The fibers are separated into fibers, the long fibers are used as the accepted pulp as the main raw material for papermaking, and the fine fibers are added to 20% by weight of the total pulp and the remainder discharged outside the papermaking system. It was added to the paper with a perpetual dry indication to obtain a stock.
又、実施例2ではバードスクリーンでパルプを分別せ
ず次の抄紙薬品および填料を添加して紙料とし、紙の抄
造時にマシン白水の10%を抄紙系外に排出した。In Example 2, the following papermaking chemicals and fillers were added to the pulp without separating the pulp with a bird screen to make a paper stock, and 10% of machine white water was discharged outside the papermaking system during papermaking.
アルケニルコハク酸無水物 0.09重量% (ファイブラン81、王子ナショナル社製) カチオン化澱粉 0.5 重量% (ケートF,王子ナショナル社製) 硫酸バンド 0.2 重量% 軽質炭酸カルシウム 5.0 重量% (TP−121S,奥多摩工業社製) この紙料を用いて長網紙抄機で抄造し、サイズプレス
及びマシンカレンダーを通し、米坪64g/m2,密度0.7g/cm
3,紙の水分5.0%の転写紙を得た。サイズブレス薬品と
してはサイズプレス用澱粉(酸化澱粉、王子エースB,王
子コンスターチ社製)とスチレン−マレイン酸共重合体
(ポリマロン385、荒川化学社製)を5:0.2の重量比率で
用い、この混合物の紙への塗布量は0.6g/m2であった。
得られた転写紙(A4判)の20℃、65%RHで12時間長湿後
の複写機でのカール、走行性及び作業性を評価した。Alkenyl succinic anhydride 0.09% by weight (Fibran 81, manufactured by Oji National) Cationic starch 0.5% by weight (Kate F, manufactured by Oji National) Sulfuric acid band 0.2% by weight Light calcium carbonate 5.0% by weight (TP-121S, Okutama) Using this stock, paper is machined with a fourdrinier paper machine, passed through a size press and machine calender, and weighed 64 g / m 2 tsubo and a density of 0.7 g / cm.
3. A transfer paper having a paper moisture of 5.0% was obtained. As size breath chemicals, starch for size press (oxidized starch, Oji Ace B, manufactured by Oji Constarch) and styrene-maleic acid copolymer (Polymalon 385, manufactured by Arakawa Chemical Co.) were used in a weight ratio of 5: 0.2. The amount of the mixture applied to paper was 0.6 g / m 2 .
The curl, running property and workability of the obtained transfer paper (A4 size) in a copying machine after long-term humidity of 12 hours at 20 ° C. and 65% RH were evaluated.
(転写紙の評価方法) 複写機での転写紙の走行性及び作業性の評価は富士ゼ
ロックス社製の電子写真式複写機(型式:5990、ソータ
ー付)でA4判の転写紙を1000枚複写して行われた。(Evaluation method of transfer paper) To evaluate the runnability and workability of the transfer paper in the copying machine, copy 1000 sheets of A4 size transfer paper with an electrophotographic copying machine (model: 5990, with sorter) manufactured by Fuji Xerox Co., Ltd. It was done.
(1)カール 第1図に示すようにカールしている転写紙の一辺を手
で掴み、対辺の円弧の高さ(L)を読み取り、転写紙の
10枚の読み取り値の平均値で示した。円弧の高さが大き
いほどカールが大きい。(1) Curl As shown in FIG. 1, one side of the transfer paper that is curled is grasped by hand, the height (L) of the arc on the opposite side is read, and the transfer paper is read.
The average value of the readings of 10 sheets was shown. The greater the height of the arc, the greater the curl.
(2)走行性 転写紙1000枚の複写を行う間に発生する紙詰まりなど
のトラブルを発生した回数で示した。(2) Runability This is the number of occurrences of troubles such as paper jams that occur while copying 1,000 sheets of transfer paper.
(3)作業性 転写紙1000枚の複写を行い、複写後の転写紙のソータ
ービンに入る枚数で評価した。(3) Workability 1000 copies of transfer paper were copied, and the number of copies of the transfer paper after copying was evaluated by the number of sheets entering the saw turbine.
(4)紙粉量の測定 転写紙1000枚の複写を行う間に複写機の感光ドラム表
面に付着する紙粉を集め重量を測定する。(4) Measurement of the amount of paper dust While copying 1,000 sheets of transfer paper, paper dust adhering to the surface of the photosensitive drum of the copying machine is collected and the weight is measured.
実施例3、4及び比較例1、2 実施例3、4及び比較例1用のパルプ原料としてフリ
ーネス410ml(C.S.F.)まで叩解したLBKP,脱墨されたフ
リーネス200ml(C.S.F.),白色度70%の新聞古紙パル
プ及びフリーネス350ml(C.S.F.),白色度70%の上質
古紙パルプを20:60:20の重量割合で配合して用いた。Examples 3 and 4 and Comparative Examples 1 and 2 LBKP beaten to a freeness of 410 ml (CSF) as a pulp raw material for Examples 3, 4 and Comparative Example 1, 200 ml of deinked freeness (CSF), 70% whiteness Newspaper wastepaper pulp, high-quality wastepaper pulp having a freeness of 350 ml (CSF) and a whiteness of 70% were mixed in a weight ratio of 20:60:20.
実施例3では実施例1と同じ処理をパルプ原料に施
し、微細繊維分を全パルプの30%抄紙系外に排出し、残
りは長繊維分と一緒にして抄紙紙料とした。In Example 3, the same treatment as in Example 1 was applied to the pulp raw material, the fine fiber component was discharged out of the papermaking system of 30% of the whole pulp, and the remainder was combined with the long fiber component to obtain a papermaking paper stock.
実施例4では実施例2と同じ処理を施し、マシン白水
の25%を抄紙系外に排出した。In Example 4, the same treatment as in Example 2 was performed, and 25% of the machine white water was discharged out of the papermaking system.
比較例1では微細繊維分の分別及び微細繊維を含有す
るマシン白水の抄紙系外への排出処理を施さなかった。In Comparative Example 1, the fractionation of the fine fiber and the treatment of discharging the machine white water containing the fine fiber out of the papermaking system were not performed.
比較例2ではパルプ原料としてLBKPと脱墨新聞古紙パ
ルプを20:80の重量割合で配合して用い、比較例1と同
様微細繊維分の分別及び微細繊維を含有するマシン白水
の抄紙系外への排出処理を施さなかった。In Comparative Example 2, LBKP and deinked newspaper wastepaper pulp were blended at a weight ratio of 20:80 and used as a pulp raw material. As in Comparative Example 1, fine fiber fractionation and machine white water containing fine fibers were taken out of the papermaking system. Was not discharged.
抄紙薬品及び填料の添加量、抄造条件を実施例1及び
2と同じにして、転写紙を抄造し、更に転写紙の評価を
実施した。The transfer paper was made by using the same amounts of papermaking chemicals and fillers as in Examples 1 and 2, and the transfer paper was further evaluated.
実施例1から比較例2までの転写紙の評価結果を第1
表に示す。The evaluation results of the transfer papers from Example 1 to Comparative Example 2 were
It is shown in the table.
第1表から明らかなように、本発明の特性を有するパ
ルプ原料を用いて抄造した転写後の複写後のカール、走
行性及び作業性が良好であるのに対し、本発明の特性を
有しないパルプ原料からの転写紙の複写後のカール、走
行性及び作業性は劣っていることが分かる。 As is clear from Table 1, the curl, transferability, and workability after copying after transfer made from the pulp raw material having the characteristics of the present invention are good, but do not have the characteristics of the present invention. It can be seen that the curl after copying of the transfer paper from the pulp raw material, running property and workability are inferior.
[発明の効果] 本発明は電子写真用転写紙の抄造に用いるパルプ原料
の繊維長分布を調整することによって、高湿度で長時間
調湿された転写紙の複写後のカールが小さく、走行性及
び作業性が著しく改善できるという効果を奏する。[Effects of the Invention] The present invention adjusts the fiber length distribution of the pulp raw material used for the papermaking of the electrophotographic transfer paper, so that the transfer paper which has been conditioned for a long time at a high humidity has a small curl after copying and has a high runnability. And the effect that workability can be remarkably improved is produced.
第1図はA4判の転写紙の複写後のカール測定を示す斜視
図である。カールはLの測定値(mm)の平均値で示され
る。 1……L(円弧の高さ)FIG. 1 is a perspective view showing the curl measurement after copying A4 size transfer paper. Curling is indicated by the average of the measured values of L (mm). 1 ... L (height of arc)
Claims (1)
するものを除く)を構成するパルプの数平均繊維長が0.
43mm以上、および0.1mm以下の微細繊維の数の割合が33
%以下であることを特徴とする電子写真用転写紙。(1) The number average fiber length of pulp constituting transfer paper (excluding those containing colloidal silica) is 0.5.
The ratio of the number of fine fibers of 43 mm or more and 0.1 mm or less is 33
% Or less, for electrophotographic transfer paper.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10635090A JP2858665B2 (en) | 1990-04-24 | 1990-04-24 | Transfer paper for electrophotography |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10635090A JP2858665B2 (en) | 1990-04-24 | 1990-04-24 | Transfer paper for electrophotography |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH045662A JPH045662A (en) | 1992-01-09 |
JP2858665B2 true JP2858665B2 (en) | 1999-02-17 |
Family
ID=14431343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10635090A Expired - Lifetime JP2858665B2 (en) | 1990-04-24 | 1990-04-24 | Transfer paper for electrophotography |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2858665B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05341554A (en) | 1992-06-04 | 1993-12-24 | Fuji Xerox Co Ltd | Electrophotographic transfer paper |
JP2004270064A (en) * | 2003-03-07 | 2004-09-30 | Asahi Kasei Corp | Structure |
JP5458318B2 (en) * | 2009-04-11 | 2014-04-02 | 丸住製紙株式会社 | Electrophotographic transfer paper |
-
1990
- 1990-04-24 JP JP10635090A patent/JP2858665B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH045662A (en) | 1992-01-09 |
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