JP2811642B2 - Transfer paper for electrophotography - Google Patents

Transfer paper for electrophotography

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Publication number
JP2811642B2
JP2811642B2 JP3145590A JP3145590A JP2811642B2 JP 2811642 B2 JP2811642 B2 JP 2811642B2 JP 3145590 A JP3145590 A JP 3145590A JP 3145590 A JP3145590 A JP 3145590A JP 2811642 B2 JP2811642 B2 JP 2811642B2
Authority
JP
Japan
Prior art keywords
paper
transfer paper
curl
pulp
difference
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.)
Expired - Lifetime
Application number
JP3145590A
Other languages
Japanese (ja)
Other versions
JPH03236062A (en
Inventor
俊介 奥島
功 小高
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
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
Oji Paper Co Ltd
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Application filed by Fuji Xerox Co Ltd, Oji Paper Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP3145590A priority Critical patent/JP2811642B2/en
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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
後に発生するカールの少な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 properties and workability in the copying machine, and in particular, to minimize curl generated after transferring toner.

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ために加熱圧着させ
る方式が採用されているが、この温度は通常180℃以上
に加熱される。即ち、転写紙はトナーでの画像形成後、
高温に加熱された金属ロールと弾性ロールの間を通過さ
せられる。この際転写紙は加熱されるので水分が減少
し、それに伴って紙の収縮が発生し、いわゆる複写後の
カールが大きくなりソーターで詰まるので拝紙ができな
いなどの作業性が悪くなるという問題があった。
An electrophotographic copying machine employs a method in which an image is formed on a transfer sheet with a toner and then heated and pressed to fix the toner on the sheet. This temperature is usually heated to 180 ° C. or higher. That is, after the transfer paper has formed an image with toner,
It is passed between a metal roll heated to a high temperature and an elastic roll. At this time, since the transfer paper is heated, the water content decreases, and the paper shrinks with the heat, so-called curl after copying becomes large, and the paper is jammed in the sorter. there were.

[発明が解決しようとする課題] かかる現状に鑑み、本発明者は紙の抄造条件とカール
の発生機構を鋭意研究した結果、紙を構成するパルプ繊
維の配向性とカールの発生原因に極めて著しい相関があ
り、パルプ繊維の配向性をコントロールすることにより
カールの発生を抑制できることを見いだし本発明を完成
するに至った。
[Problems to be Solved by the Invention] In view of the present situation, the present inventors have conducted intensive studies on the papermaking conditions and the curl generation mechanism, and found that the orientation of the pulp fibers constituting the paper and the cause of the curl are extremely remarkable. There is a correlation, and it has been found that curling can be suppressed by controlling the orientation of pulp fibers, and the present invention has been completed.

従って、本発明の目的は電子写真式複写機において転
写後にカールの発生が少なく、走行性及び作業性が極め
て良好な電子写真用転写紙を提供することにある。
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an electrophotographic transfer paper which is less likely to curl after transfer in an electrophotographic copying machine, and has extremely excellent running properties and workability.

[課題を解決するための手段] 本発明は紙のフェルト層とワイヤー層の水分変化に基
づく伸縮率の差が紙の流れ方向において0.006から−0.0
06の範囲であり、紙のクロス方向において0.011から−
0.011の範囲であることを特徴とした電子写真用転写紙
という構成としたものである。
Means for Solving the Problems According to the present invention, the difference in expansion and contraction ratio based on the change in moisture between the felt layer and the wire layer of paper is 0.006 to -0.0 in the paper flow direction.
06, from 0.011 in the cross direction of the paper-
The transfer paper for electrophotography is characterized by being in the range of 0.011.

本発明の伸縮率の測定方法は以下の通りである。 The measuring method of the expansion and contraction ratio of the present invention is as follows.

転写紙の流れ方向及びクロス方向において幅5mm,長さ
100mmの短冊状の紙片を採取する。この紙片を第1図に
示すように20℃の環境下に片持ち梁で50mm支持し,周り
の湿度を変化させることにより紙片の水分を変化させて
紙片にカールを発生せしめ、この時の△Xと△Y及び紙
片の水分を測定する。水分(M)はカールの測定用とは
別に用意した紙片で測定し、カール測定用紙片と同じ湿
度下においてその重量(Wg)を測定し、全てのカールの
測定が終了した後にその紙片の絶乾重量(Wo)を測定し
て、次式によってカール測定時の紙片の水分を求める。
5mm width and length in transfer paper flow direction and cross direction
Collect 100 mm strips of paper. As shown in FIG. 1, this paper piece is supported by a cantilever at 50 mm in an environment of 20 ° C., and by changing the surrounding humidity, the water content of the paper piece is changed to cause the paper piece to curl. X and ΔY and the moisture of the paper piece are measured. The moisture (M) is measured with a piece of paper prepared separately from the curl measurement, and its weight (Wg) is measured under the same humidity as the curl measurement paper piece. The dry weight (Wo) is measured, and the moisture of the paper piece at the time of curl measurement is obtained by the following equation.

M={(Wg−Wo)/Wg}×100(%) 湿度を65%RH−80%RH−20%RH−80%RH−20%RH−80
%RH−20%RH−80%RHの如く変化させ、それぞれの湿度
で測定された紙片の水分での紙片のカール曲率(k)を
次式によって求める。
M = {(Wg-Wo) / Wg} x 100 (%) Humidity is 65% RH-80% RH-20% RH-80% RH-20% RH-80
% RH-20% RH-80% RH, and the curl curvature (k) of the piece of paper at the moisture of the piece of paper measured at each humidity is determined by the following equation.

k=2△Y/(△X2+△Y2) 本発明では最終サイクルでの湿度20%RH及び80%RHに
おける紙片の水分、M20とM80及びカール曲率、k20とk80
を求め、これらの値から次式によって紙片の水分が1%
変化した場合の曲率変化(k)を求める。
k = 2 △ Y / (△ X 2 + △ Y 2) This paper moisture in a humidity 20% RH and 80% RH in the final cycle in the invention, M 20 and M 80 and curl curvature, k 20 and k 80
From these values, the moisture content of the piece of paper is 1%
A change in curvature (k) in the case of a change is obtained.

K=(k80−k20)/(M80−M20) 転写紙がフェルト層とワイヤー層の2層から構成され
ているとして、それぞれの層の水分が1%変化した場合
の寸法変化率、即ちそれぞれの伸縮率をRf,Bwとすると
表裏差(Bf−Bw)と曲率変化(k)の関係式は転写紙の
厚みをtとして近似的に次式で表される。
K = (k 80 -k 20) / a (M 80 -M 20) transfer sheet is composed of two layers of the felt layer and the wire layer, the dimensional change rate when the moisture of each layer is changed 1% That is, assuming that the respective expansion and contraction rates are Rf and Bw, the relational expression between the front-back difference (Bf−Bw) and the curvature change (k) is approximately expressed by the following equation, where t is the thickness of the transfer paper.

(Bf−Bw)=−2tK/3 紙を構成しているパルプ繊維の断面方向への水分変化
による寸法変化は長さ方向への寸法変化に比べて10倍程
度であるから、紙の抄造の際にフェルト層とワイヤー層
で繊維配向の程度が異なれば紙の伸縮表裏差(Bf−Bw)
が発生し、カール発生の主原因となっている。従って、
フェルト層でパルプ繊維が流れ方向に並んでいる傾向が
強く(即ち、繊維配向が強く)、逆にワイヤー層ではそ
の傾向が弱い(即ち、繊維配向が弱い)場合、フェルト
層の流れ方向における伸縮率は繊維配向が弱い場合に比
べて小さく、クロス方向における伸縮率は大きくなり、
一方ワイヤー層では流れ方向における伸縮率は繊維配向
が強い場合に比べて大きくなり、クロス方向では逆にな
る。即ち、フェルト層とワイヤー層の繊維配向の強さの
差が大きくなる程流れ方向及びクロス方向における伸縮
率の表裏差が大きくなるので、この伸縮率の表裏差を小
さくするには繊維配向の表裏差を小さくしなければなら
ない。
(Bf−Bw) = − 2tK / 3 Since the dimensional change due to moisture change in the cross-sectional direction of the pulp fibers constituting the paper is about 10 times as large as the dimensional change in the length direction, If the degree of fiber orientation is different between the felt layer and the wire layer, the difference between the front and back sides of the paper (Bf-Bw)
Is a major cause of curl. Therefore,
If the pulp fibers tend to be aligned in the flow direction in the felt layer (that is, the fiber orientation is strong) and conversely in the wire layer, that tendency is weak (that is, the fiber orientation is weak), the felt layer expands and contracts in the flow direction. The ratio is smaller than the case where the fiber orientation is weak, the expansion and contraction ratio in the cross direction increases,
On the other hand, in the wire layer, the expansion and contraction ratio in the flow direction is larger than that in the case where the fiber orientation is strong, and is opposite in the cross direction. That is, as the difference in the strength of fiber orientation between the felt layer and the wire layer increases, the difference between the front and back of the expansion ratio in the flow direction and the cross direction increases. The difference must be small.

本発明では紙の抄造条件を変化させて繊維配向を調整
し、それによって伸縮率の表裏差を調整するのが好都合
である。
In the present invention, it is convenient to adjust the fiber orientation by changing the papermaking conditions of the paper, and thereby adjust the difference between the front and back sides of the expansion ratio.

そのひとつの方法としては抄紙機のワイヤー上での脱
水速度をスライスから噴出するパルプスラリーのワイヤ
ー上への着地点の長短をコントロールする。即ち、パル
プスラリーのワイヤー上への着地点の長短はスライスの
上リップと下リップの開度及び上リップの水平位置によ
ってコントロールすることができ、パルプスラリーのジ
ェット流をフォーミングボードの手前側(インレット
側)に落とすほど脱水が早くなって、ワイヤー層の繊維
配向がフェルト層の繊維配向より強くなり、繊維配向表
裏差が大きくなる。したがって、パルプスラリーのジェ
ット流の着地点をフォーミングボードの手前側(インレ
ット側)から向こう側(プレス側)へ移動させるに従
い、繊維配向表裏差は小さくなるが、一方、パルプスラ
リーのジェット流をフオーミングボードの向かう側(プ
レス側)へ落とすほどフェルト層の繊維配向がワイヤー
層の繊維配向より強くなり、再び繊維配向表裏差が大き
くなる。ジェット流の速度、m/min.(J)とワイヤー速
度、m/min.(W)の比は一つの目安であるが、本発明で
はJ/Wは0.95〜1.05の範囲内で適宜選ばれる。このよう
にして、パルプスラリーのジェット流のワイヤー上への
着地点の長短をコントロールすることにより繊維配向表
裏差を調整して伸縮率表裏差が小さくなる点を選び、流
れ方向で0.006から−0.006の範囲、クロス方向で0.011
から−0.011の範囲に保持することが出来る。
As one of the methods, the dewatering speed on the wire of the paper machine is controlled by controlling the length of the pulp slurry ejected from the slice on the wire. That is, the length of the pulp slurry landing point on the wire can be controlled by the opening degree of the upper lip and the lower lip of the slice and the horizontal position of the upper lip, and the jet flow of the pulp slurry is fed to the front side of the forming board (inlet). The fiber orientation of the wire layer becomes stronger than the fiber orientation of the felt layer, and the difference between the fiber orientation front and back increases. Therefore, as the jetting point of the pulp slurry is moved from the near side (inlet side) to the far side (press side) of the forming board, the difference in fiber orientation front and back becomes smaller. The fiber orientation of the felt layer becomes stronger than the fiber orientation of the wire layer as it is dropped toward the side of the mining board (press side). The ratio of the jet flow speed, m / min. (J), to the wire speed, m / min. (W) is one measure. In the present invention, J / W is appropriately selected within the range of 0.95 to 1.05. . In this way, by controlling the length of the pulp slurry jet stream landing point on the wire, to adjust the fiber orientation front and back difference, select a point where the difference between the expansion and contraction front and back is reduced, and from 0.006 to -0.006 in the flow direction Range, 0.011 in cross direction
To -0.011.

本発明に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使用される。更に、本発明は
公知の抄紙用薬品と抄紙機で製造される電子写真用転写
紙に応用される。
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 desired. Further, the present invention is applied to known papermaking chemicals and electrophotographic transfer paper manufactured by a paper machine.

[実施例] 以下に実施例をあげて本発明をより具体的に説明する
が、もちろん本発明はこれによって限定されるものでは
ない。
[Examples] The present invention will be described in more detail with reference to examples below, but of course, the present invention is not limited thereto.

実施例及び比較例 実施例1〜4及び比較例1〜3 フリーネス410mlc.s.f.(カナダ標準フリーネス)ま
で叩解した広葉樹晒クラフトパルプ(LBKP)を抄紙用原
料パルプとして用い、次に示す通り抄紙用薬品及び填料
をパルプ当り絶乾表示で添加した。
Examples and Comparative Examples Examples 1-4 and Comparative Examples 1-3 Hardwood bleached kraft pulp (LBKP) beaten to a freeness of 410 mlc.sf (Canada Standard Freeness) was used as a raw pulp for papermaking, and a chemical for papermaking was used as shown below. And fillers were added on a pulp basis on a dry basis.

アルケニルコハク酸無水物(ファイブラン−81、王子
ナショナル社製) 0.09重量% カチオン化デンプン(ケートF,王子ナショナル社製) 0.5 重量% 硫酸バンド 0.2 重量% 炭酸カルシウム(軽質、TP−121S、奥多摩工業社製) 5.0 重量% この紙料を用いて長網抄紙機で抄造し、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/cm3,
紙の水分5.0%の転写紙を得た。サイズプレス薬品とし
てはサイズプレス用デンプン(酸化デンプン、王子エー
スB,王子ナショナル社製)とスチレン−マレイン酸共重
合体(ポリマロン−482、荒川化学社製)を5:0.2の比率
で用い、この混合物の紙への塗布は0.6g/m2であった。
得られた転写紙(A4判)の複写後のカール、走行性及び
作業性を評価し、結果を第1表に示す。
Alkenyl succinic anhydride (Fibran-81, manufactured by Oji National) 0.09% by weight Cationized starch (Kate F, manufactured by Oji National) 0.5% by weight Sulfuric acid band 0.2% by weight Calcium carbonate (light, TP-121S, Okutama Kogyo) 5.0% by weight This paper material is used to make paper with a Fourdrinier paper machine and passed through a size press and a machine calender to produce 64 g / m 2 rice tsubo, 0.7 g / cm 3 density,
A transfer paper having a paper moisture of 5.0% was obtained. As size press chemicals, starch for size press (oxidized starch, Oji Ace B, manufactured by Oji National) and styrene-maleic acid copolymer (Polymalon-482, manufactured by Arakawa Chemical Co.) were used in a ratio of 5: 0.2. The application of the mixture to paper was 0.6 g / m 2 .
The resulting transfer paper (A4 size) was evaluated for curl after copying, runnability and workability. The results are shown in Table 1.

(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複写機(形式: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 using an electrophotographic copying machine (type: 5990, with sorter) manufactured by Fuji Xerox Co., Ltd. Was done.

1)カール 第2図に示すように、カールしている転写紙の一辺を
手でつまみ、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
大きい程カールが大きい。
1) Curl As shown in FIG. 2, one side of the curled transfer paper is pinched by hand, the height (L) of the arc on the opposite side is read, and the average value of the read values of 10 sheets of the transfer paper is shown. . The curl increases as the height of the arc increases.

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
のトラブルが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 1000 sheets of transfer paper.

3)作業性 複写後の転写紙がソータービンに入る枚数で評価し
た。
3) Workability Evaluation was made based on the number of transfer papers after copying entering the saw turbine.

実施例5〜8及び比較例4〜6 パルプ原料としてフリーネス410mlc.s.f.(カナダ標
準フリーネス)のLBKP、脱墨されたフリーネス200mlc.
s.f.(カナダ標準フリーネス)及び白色度70%の新聞古
紙パルプ及びフリーネス350ml及び白色度70%の上質古
紙パルプを第2表のように配合したこと以外は実施例1
〜4及び比較例1〜3と同じ様にして転写紙を抄造し
た。得られた転写紙の評価も前記と同じ様に行ない。結
果を第2表に示す。
Examples 5-8 and Comparative Examples 4-6 LBKP of freeness 410mlc.sf (Canada standard freeness) as a pulp raw material, deinked freeness 200mlc.
Example 1 except that sf (Canadian standard freeness) and newsprint pulp with 70% whiteness and 350 ml of freeness and high quality wastepaper pulp with 70% whiteness were blended as shown in Table 2.
Transfer paper was prepared in the same manner as in Comparative Examples 1 to 4 and Comparative Examples 1 to 3. The obtained transfer paper is evaluated in the same manner as described above. The results are shown in Table 2.

第1表及び第2表から明らかなように、本発明の伸縮
率表裏差の特性値を有する転写紙の複写後のカール、走
行性及び作業性が良好であるのに対し、本発明の伸縮率
表裏差よりはずれた特性値を有する転写紙の複写後カー
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 Tables 1 and 2, the transfer paper having the characteristic value of the difference between the front and back of the expansion and contraction ratio of the present invention has good curl after copying, running property and workability. It can be seen that the curl after copying of the transfer paper having the characteristic value deviated from the difference between the front and back sides, the running property and the workability are inferior.

[発明の効果] 本発明は電子写真用転写紙の流れ方向及びクロス方向
における伸縮率表裏差を調整することにより、用いるパ
ルプ原料の種類に関係なく複写後のカールが少なく、走
行性及び作業性が著しく改善できるという効果を有す
る。
[Effects of the Invention] In the present invention, the curl after copying is small irrespective of the type of pulp material used, and the running property and workability are adjusted by adjusting the difference in front and back of the expansion ratio in the flow direction and cross direction of the electrophotographic transfer paper. Can be remarkably improved.

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

第1図は転写紙の伸縮率を測定する際の紙片の支持及び
測定を示す概略図であり、第2図はA4判の転写紙のカー
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……△Y 2……△X 3……紙片 4……L
FIG. 1 is a schematic view showing the support and measurement of a piece of paper when measuring the expansion and contraction ratio of a transfer sheet, and FIG. 2 is a perspective view showing the curl measurement of an A4 size transfer sheet. Curl is the measured value of L (mm)
It is shown by the average value of 1...… Y 2... △ X 3...

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】紙のフェルト層とワイヤー層の水分変化に
基づく伸縮率の差が紙の流れ方向において0.006から−
0.006の範囲であり、紙のクロス方向において0.011から
−0.011の範囲であることを特徴とする電子写真用転写
紙。
The difference in expansion and contraction ratio based on the change in moisture between the felt layer and the wire layer of the paper is from 0.006 in the paper flow direction.
An electrophotographic transfer paper having a range of 0.006 and a range of 0.011 to -0.011 in the cross direction of the paper.
JP3145590A 1990-02-14 1990-02-14 Transfer paper for electrophotography Expired - Lifetime JP2811642B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3145590A JP2811642B2 (en) 1990-02-14 1990-02-14 Transfer paper for electrophotography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3145590A JP2811642B2 (en) 1990-02-14 1990-02-14 Transfer paper for electrophotography

Publications (2)

Publication Number Publication Date
JPH03236062A JPH03236062A (en) 1991-10-22
JP2811642B2 true JP2811642B2 (en) 1998-10-15

Family

ID=12331730

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3145590A Expired - Lifetime JP2811642B2 (en) 1990-02-14 1990-02-14 Transfer paper for electrophotography

Country Status (1)

Country Link
JP (1) JP2811642B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05341554A (en) 1992-06-04 1993-12-24 Fuji Xerox Co Ltd Electrophotographic transfer paper

Also Published As

Publication number Publication date
JPH03236062A (en) 1991-10-22

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