JP3667993B2 - Paper sheet separating member - Google Patents
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- JP3667993B2 JP3667993B2 JP15034298A JP15034298A JP3667993B2 JP 3667993 B2 JP3667993 B2 JP 3667993B2 JP 15034298 A JP15034298 A JP 15034298A JP 15034298 A JP15034298 A JP 15034298A JP 3667993 B2 JP3667993 B2 JP 3667993B2
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- paper sheet
- sheet separating
- separating member
- paper
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- Polyurethanes Or Polyureas (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、複写機、ファクシミリ、プリンター等の各種ＯＡ機器の給紙装置における重送防止を目的とする紙葉類分離部材に関するものであり、より詳しくは、摩擦係数維持特性および耐摩耗性に優れ、「鳴き」の発生防止ならびにプリンター印刷時の汚染を防止した紙葉類分離部材に関する。
【０００２】
【従来の技術】
給紙装置においては、回転されるフィードローラに紙葉類分離部材が対向配置されており、この紙葉類分離部材はフィードローラに圧接されている。紙葉類分離部材としては、エチレン・プロピレンゴム製のものが一般に用いられている。また、給紙装置においては、紙葉類をフィードローラと紙葉類分離部材との間に供給する搬送部が設けられており、この搬送部によって、フィードローラと紙葉類分離部材との間に供給された紙葉類は、フィードローラの回転によって、さらに搬送されるようになっている。
【０００３】
この搬送において、複数枚の紙葉類がフィードローラと紙葉類分離部材との間に供給された場合には、紙葉類分離部材側の紙葉類は、紙葉類分離部材との間に作用する摩擦力により、フィードローラ側の紙葉類と一緒に搬送される、つまり重送が阻止される。そして、紙葉類分離部材側の紙葉類が、フィードローラ側に至ったときにフィードローラの回転によって搬送されるようになっている。
【０００４】
【発明が解決しようとする課題】
しかしながら、紙葉類分離部材は、経時にともない紙葉類との接触部分が摩耗することや紙葉類の紙粉によって摩擦係数が不安定になることがあり、これによって紙葉類の重送や給紙ミス（ＪＡＭ）を起こしてしまうという問題がある。
【０００５】
また、紙葉類分離部材と紙葉を摺動させる際に「鳴き」と称する異常音が発生する。この鳴きの発生を抑えるために、従来ではコルク入りゴム等が使用されることもあったが、その場合は耐摩耗性及び摩擦係数維持特性が不十分であるという問題がある。
【０００６】
さらに、インクジェットプリンタのように、カラープリンタの小型化、低コスト化が進んだことに伴い利用分野が拡大し、多種多様の紙に対応しなければならないという現実的な要請がある。インクジェットプリンタにおいては、より鮮明な画像を得るために各社メーカーでは専用コート紙や専用ＯＨＰ紙を用意するようになってきている。
【０００７】
ところが、専用ＯＨＰ紙の裏面は摩擦係数が非常に大きいため、従来の分離部材では適正な搬送ができなかったり紙送りがスムーズにできないという問題、さらには振動音と鳴きが発生するという問題が発生している。
一方、専用コート紙裏面での摩擦係数を下げると、普通のＰＰＣ用紙等で摩擦係数が低下し、重送が発生してしまうという問題があり、あらゆる紙に対して安定した摩擦係数を有する分離部材の出現が望まれている。
【０００８】
さらにこれらの紙種は、フィードローラや紙葉類分離部材に汚染物質が含まれていると紙に移行してしまい、画像のにじみ等、画質の低下をもたらすために、汚染しない分離部材が望まれている。
【０００９】
【発明の目的】
そこで、本発明の目的は、優れた耐摩耗性および紙種を選ばない摩擦係数維持特性を持ち、紙葉の重送、さらにはＪＡＭや鳴きの発生を防止できると共に、紙に対する汚染を防止することができる紙葉類分離部材を提供することにある。
【００１０】
【課題を解決するための手段】
本発明は、前記目的を達成するために提案されたものであり、紙葉類を搬送するフィードローラに対向して配置されるシート状部材およびローラ状部材として、特定のカプロラクトン成分と特定範囲の平均分子量を有するポリカプロラクトンエステルと、ポリイソシアネートとを反応硬化させて得られたポリウレタンゴムを用いた点に重要な特徴がある。
【００１１】
すなわち、本発明によれば、３０重量％以上のカプロラクトン成分を含有し、１０００ないし４０００の平均分子量を有するポリカプロラクトンエステルと、ポリイソシアネートを反応硬化させて得られたポリウレタンゴム材質を重送防止部材とすることを特徴とする紙葉類分離部材が提供される。
【００１２】
また、本発明によれば、重送防止部材が独立気泡を有する発泡成形体である上記紙葉類分離部材が提供される。
【００１３】
また、本発明によれば、発泡成形体の密度が０．３ｇ／ｃｍ 3 ないし０．９ｇ／ｃｍ 3 で ある上記紙葉類分離部材が提供される。
【００１４】
また、本発明によれば、発泡成形体がメカニカルフロスを用いて成形されたものである上記紙葉類分離部材が提供される。
【００１５】
また、本発明によれば、重送防止部材の表面粗さが１０点での平均粗さで２０ないし１００μｍである上記紙葉類分離部材が提供される。
【００１６】
また、本発明によれば、重送防止部材の硬度がアスカーＣにて５０°ないし９５°である上記紙葉類分離部材が提供される。
【００１７】
また、本発明によれば、重送防止部材の表面粗さが２０μｍ以下であってソリット状である上記紙葉類分離部材が提供される。
【００１８】
また、本発明によれば、重送防止部材の硬度（ＪＩＳ Ａ）が５０°ないし８０°である上記紙葉類分離部材が提供される。
【００１９】
【発明の実施の形態】
本発明の重要な特徴は、紙葉類分離部材における重送防止部材として、３０重量％以上のカプロラクトン成分を含有し、１０００ないし４０００の平均分子量を有するポリカプロラクトンエステルと、ポリイソシアネートを反応硬化させて得られたポリウレタンゴム材質を用いる点にある。
【００２０】
ポリカプロラクトンエステルのカプロラクトン成分は３０重量％以上の割合で含有されていることが重要である。カプロラクトンの含有割合が３０重量％未満のものは、耐摩耗性に劣り重送防止部材として不適当である。
【００２１】
また、ポリカプロラクトンエステルの平均分子量が１０００未満のものは、硬度が上がり過ぎるとμが低下する傾向があり、平均分子量が４０００を超えるものは、硬度が下がり過ぎるとμが上昇する傾向があり、重送防止部材としての適性に劣るものとなる。
【００２２】
本発明の紙葉類分離部材は、ポリカプロラクトンエステル（ポリオール）とポリイソシアネートは、硬化剤と共に反応させることによって得ることができる。まず、ポリオールとポリイソシアネートを反応させて液状のゴム組成物を調製し、これに硬化剤を配合して重送防止部材として成形されるものである。
【００２３】
上記重送防止部材は、発泡成形体であってもよいし、発泡構造を持たないソリット状のものであってもよい。発泡成形体は独立気泡を有するものであることが望ましく、その発泡体密度は０．３ｇ／ｃｍ 3 ないし０．９ｇ／ｃｍ 3 好ましくは０．５ｇ／ｃｍ 3 ないし０．８ｇ／ｃｍ 3 であることが望ましい。
発泡体密度が０．３ｇ／ｃｍ 3 未満のものは機械的強度に劣り、０．９ｇ／ｃｍ 3 を超えるものは成形性に劣り、セルの安定性が低くなる。
【００２４】
前記重送防止部材が発泡成形体である時は、ポリオールとポリイソシアネートの反応によって得られる液状のゴム組成物にメカニカルフロスを用いて気泡を抱き込ませた後、硬化剤を添加し、加熱（例えば、１２０℃）した金型に注型し所望形状の発泡成形体とする。
重送防止部材の形状は、自体公知の方法によって板状あるいは円筒状など任意の形状にすることができ、さらに加工あるいは研磨等を用いて製品とする。
【００２５】
重送防止部材が独立気泡を有する発泡成形体で構成されている時は、その表面粗さが１０点での平均粗さで２０ないし１００μｍであることが好ましい。上記表面粗さが２０μｍ未満の時は、機械的強度に劣り、１００μｍを超える時はセルの安定性が低下する。
【００２６】
また、本発明の重送防止部材は、硬度がアスカーＣにて５０°以上、好ましくは６０ないし９５°であることが望ましい。重送防止部材の硬度が５０°未満のものは、摩擦力が大きくなり過ぎ、給紙ミスを引き起こす傾向がある。
【００２７】
また、重送防止部材がソリット状の場合は、硬度（ＪＩＳ Ａ）が５０°以上、とくに６０ないし８０°であることが、紙葉を分離するのに適切な摩擦力となる。
【００２８】
本発明の紙葉類分離部材は、重送防止部材とフィードローラとの間に複数枚の紙葉が挿入された場合に重送防止部材側の紙葉が、重送防止部材と当接し、摩擦力を受ける。本発明においては、この重送防止部材が、上記特定のポリオールとポリイソシアネートとを反応硬化させて得られたポリウレタンゴム材質によって構成されているために、紙葉に充分な摩擦力が付与され、重送が確実に防止される。さらに、この重送防止部材は、紙葉の搬送の際に発生する「鳴き」を防止できると共に、長期にわたって使用しても、紙葉に対する摩擦係数の低下が抑制されるばかりでなく、あらゆる紙種に応じて搬送するに適した摩擦係数を維持することができ、紙種に関係なく好適な紙葉類分離特性を発揮する。
【００２９】
また、本発明の紙葉類分離部材は、耐摩耗性に優れるばかりでなく、表面が滑らかな状態となっているので、フィードローラが摺動してもフィードローラの摩耗を抑えられるし、搬送する紙葉の繊維や紙粉が付着しにくく、フィードローラを汚染することはない。また、フィードローラが油展材質によって形成されている場合であっても、それによって、紙葉類分離部材が膨潤することはない。
【００３０】
本願請求項２以降の発明は、上記請求項１記載の発明において、上記効果をより一層優れたものにするための要件であり、これらの特性を併せ備えることにより、摩擦係数維持特性および耐摩耗性に優れ、「鳴き」の発生防止ならびにプリンター印刷時の汚染防止効果に著しく優れた紙葉類分離部材を提供することができる。
【００３１】
本発明の重送防止部材は、装置の形状や目的に応じて任意の形状を採ることができるが、例えば、凹凸を施す方法としては、重送防止部材を成形するための金型内面（成形品の表面と接触する面）に、しぼ加工を施しておき、該金型を用いて成形する方法を採用できる。また、サンドブラスト等のブラスト加工を施したり、砥石で表面をこすったり、放電加工を施すことにより凹凸を形成することもできる。
【００３２】
本発明の重送防止部材は、上記ウレタンゴム材質から本質的になるものであるが、発明の目的を損なわない範囲で、無機充填剤、カーボンブラックなどの各種の配合剤を添加することができる。
例えば、無機充填材としては、タルクや炭酸カルシウムが好ましく用いられ、これによって、耐熱性、耐熱膨張性、耐薬品性、耐摩耗性が向上する上、シリカを含有させたときのような物性の著しい低下がない。
また、無機充填材の配合量は、特に限定されるものではないが、タルクを配合する場合には、ゴム１００重量部に対して１０ないし３０重量部、炭酸カルシウムを配合する場合には、８０ないし１００重量部程度の配合が上記効果をより発揮させる点において好ましい。
【００３３】
【発明の効果】
本発明によれば、特定のポリウレタンゴム材質を紙葉類分離部材の重送防止部材として用いたことにより、鳴きの発生を防止し、耐熱性、耐熱膨張性、耐薬品性に優れ、かつ給紙特性に優れた紙葉類分離部材を提供することができる。
【００３４】
【実施例】
以下、実施例によって本発明を説明する。
＜実施例１＞
成形材料として、カプロラクトン６３．４重量％を含有し、平均分子量２０００のポリカプロラクトンエステル１００重量部と、ポリイソシアネート４６重量部をブレンドし、１００℃で１２分間反応させ、液状のポリウレタン材質を得た。
次いで、この液状のポリウレタン材質にプレポリマーＲＵ−２６００が１００であるメカニカルフロスを用いて気泡を抱き込ませた後、硬化剤として、１．４ＢＤ／ＴＭＰが８５／１５を３．５重量部、ＢＨＥＢを８．２５重量部、水を０．０５重量部混合したものを１１．８重量部を添加して、１２０℃に加熱した金型に注入し１００分後に、アスカーＣ硬度が８５°のカプロラクトンウレタンの発泡成形体（重送防止部材）を取り出した。
得られた重送防止部材を、ＥＰＤＭ製のフィードローラに２．９Ｎの荷重で圧接させ重送防止部材とフィードローラとの間に紙葉を供給し、紙葉５万枚通紙後の「鳴き」の発生状況を確認すると共に、耐汚染性、摩擦係数維持特性、耐摩耗性、ブルームの有無を目視によって評価した。
結果を表１に示した。
【００３５】
＜実施例２＞
重送防止部材としてアスカーＣ硬度７０のカプロラクトンロラクトンウレタンを用いたほかは、実施例１と同様に行った。結果を表１に示した。
【００３６】
＜実施例３＞
重送防止部材としてアスカーＣ硬度５０のカプロラクトンロラクトンウレタンを用いたほかは、実施例１と同様に行った。結果を表１に示した。
【００３７】
＜比較例１＞
重送防止部材としてアスカーＣ硬度６０のエーテル系ウレタンを用いたほかは、実施例１と同様に行った。結果を表１に示した。
【００３８】
＜比較例２＞
重送防止部材としてアスカーＣ硬度８０のＥＰＤＭを用いたほかは、実施例１と同様に行った。結果を表１に示した。
【００３９】
【表１】
＜実施例４ないし７、比較例３ないし６＞ 重送防止部材を構成するゴムの種類、カプロラクトン含量、平均分子量を、それぞれ表２に示したとおりに変えて実施例１と同様に行った。
結果を表２に示した。
【００４１】
【表２】
BACKGROUND OF THE INVENTION
The present invention relates to a paper sheet separating member for the purpose of preventing double feeding in a paper feeder of various OA equipment such as a copying machine, a facsimile machine, and a printer. More specifically, the present invention relates to friction coefficient maintenance characteristics and wear resistance. The present invention relates to a paper sheet separating member which is excellent in preventing occurrence of “squeal” and preventing contamination during printer printing.
[0002]
[Prior art]
In the paper feeding device, a paper sheet separating member is disposed opposite to a rotating feed roller, and the paper sheet separating member is pressed against the feed roller. As the paper sheet separating member, one made of ethylene / propylene rubber is generally used. In addition, the paper feeding device is provided with a transport unit that supplies paper sheets between the feed roller and the paper sheet separating member, and this transport unit provides a space between the feed roller and the paper sheet separating member. The paper sheets supplied to are further conveyed by the rotation of the feed roller.
[0003]
In this conveyance, when a plurality of paper sheets are supplied between the feed roller and the paper sheet separating member, the paper sheets on the paper sheet separating member side are between the paper sheet separating members. Due to the frictional force acting on the paper, it is conveyed together with the paper sheets on the feed roller side, that is, double feeding is prevented. The paper sheet on the paper sheet separating member side is conveyed by the rotation of the feed roller when it reaches the feed roller side.
[0004]
[Problems to be solved by the invention]
However, the paper sheet separating member may wear out in contact with the paper sheet over time, and the friction coefficient may become unstable due to the paper powder of the paper sheet. And a paper feeding error (JAM) occurs.
[0005]
Further, when the paper sheet separating member and the paper sheet are slid, an abnormal sound called “squeal” is generated. In order to suppress the occurrence of this squeal, a cork-filled rubber or the like has been conventionally used. However, in that case, there is a problem that the wear resistance and the coefficient of friction maintenance characteristic are insufficient.
[0006]
Further, as the color printers are becoming smaller and lower in cost, such as ink jet printers, there is a practical demand that the field of use expands and a variety of papers must be supported. In inkjet printers, manufacturers of various companies are preparing special coated paper and special OHP paper in order to obtain a clearer image.
[0007]
However, since the friction coefficient of the back side of the dedicated OHP paper is very large, there is a problem that proper separation cannot be performed with the conventional separation member, and paper feeding cannot be performed smoothly, and further, there is a problem that vibration noise and squeal are generated. doing.
On the other hand, if the friction coefficient on the back side of the special coated paper is lowered, there is a problem that the friction coefficient decreases with ordinary PPC paper and the like, and double feeding occurs. The appearance of members is desired.
[0008]
In addition, these paper types are transferred to paper if the feed roller or paper sheet separating member contains contaminants, and this causes a deterioration in image quality such as image blurring. It is rare.
[0009]
OBJECT OF THE INVENTION
Accordingly, an object of the present invention is to have excellent wear resistance and a friction coefficient maintaining property that does not select any paper type, and can prevent the double feeding of paper sheets, the occurrence of JAM and squeal, and the contamination of paper. An object of the present invention is to provide a paper sheet separating member.
[0010]
[Means for Solving the Problems]
The present invention has been proposed in order to achieve the above-mentioned object, and as a sheet-like member and a roller-like member arranged opposite to a feed roller for conveying paper sheets, a specific caprolactone component and a specific range are provided. An important characteristic is that a polyurethane rubber obtained by reaction-curing polycaprolactone ester having an average molecular weight and polyisocyanate is used.
[0011]
In other words, according to the present invention, a polycaprolactone ester containing 30% by weight or more of a caprolactone component and having an average molecular weight of 1000 to 4000 and a polyurethane rubber material obtained by reaction-curing polyisocyanate are used as a multifeed prevention member. A paper sheet separating member is provided.
[0012]
In addition, according to the present invention, there is provided the paper sheet separating member, wherein the double feed preventing member is a foamed molded body having closed cells.
[0013]
In addition, according to the present invention, there is provided the paper sheet separating member, wherein the density of the foamed molded product is 0.3 g / cm 3 to 0.9 g / cm 3 .
[0014]
In addition, according to the present invention, there is provided the paper sheet separating member, wherein the foamed molded body is formed using a mechanical floss.
[0015]
Further, according to the present invention, there is provided the paper sheet separating member, wherein the surface roughness of the multifeed preventing member is 20 to 100 μm in average roughness at 10 points.
[0016]
Further, according to the present invention, there is provided the paper sheet separating member, wherein the hardness of the double feed preventing member is 50 ° to 95 ° in Asker C.
[0017]
In addition, according to the present invention, there is provided the above-mentioned paper sheet separating member in which the surface roughness of the double feed preventing member is 20 μm or less and has a solit shape.
[0018]
Further, according to the present invention, there is provided the paper sheet separating member, wherein the double feed preventing member has a hardness (JIS A) of 50 ° to 80 ° .
[0019]
DETAILED DESCRIPTION OF THE INVENTION
An important feature of the present invention is that a polycaprolactone ester containing 30% by weight or more of a caprolactone component and having an average molecular weight of 1000 to 4000 is reactively cured with a polyisocyanate as a multifeed preventing member in a paper sheet separating member. The polyurethane rubber material obtained in this way is used.
[0020]
It is important that the caprolactone component of the polycaprolactone ester is contained in a proportion of 30% by weight or more. A caprolactone content of less than 30% by weight is inferior in wear resistance and is not suitable as a multifeed prevention member.
[0021]
Moreover, when the average molecular weight of the polycaprolactone ester is less than 1000, μ tends to decrease when the hardness is excessively increased, and when the average molecular weight exceeds 4000, μ tends to increase when the hardness is excessively decreased, This is inferior in suitability as a multifeed preventing member.
[0022]
The paper sheet separating member of the present invention can be obtained by reacting polycaprolactone ester (polyol) and polyisocyanate together with a curing agent. First, a liquid rubber composition is prepared by reacting a polyol and a polyisocyanate, and a curing agent is blended therein to be molded as a multifeed preventing member.
[0023]
The multi-feed preventing member may be a foamed molded body or a solit-shaped member having no foamed structure. The foamed molded article desirably has closed cells, and the foam density is 0.3 g / cm 3 to 0.9 g / cm 3, preferably 0.5 g / cm 3 to 0.8 g / cm. Desirably it is cm 3 .
When the foam density is less than 0.3 g / cm 3 , the mechanical strength is inferior, and when the foam density exceeds 0.9 g / cm 3 , the moldability is inferior and the stability of the cell is lowered.
[0024]
When the multi-feed preventing member is a foamed molded article, bubbles are embraced using a mechanical floss in a liquid rubber composition obtained by the reaction between a polyol and a polyisocyanate, and then a curing agent is added and heated ( For example, it is cast into a mold molded at 120 [deg.] C. to obtain a foam molded body having a desired shape.
The shape of the double feed preventing member can be made into an arbitrary shape such as a plate shape or a cylindrical shape by a method known per se, and further processed or polished to obtain a product.
[0025]
When the multifeed preventing member is formed of a foamed molded article having closed cells, the surface roughness is preferably 20 to 100 μm in average roughness at 10 points. When the surface roughness is less than 20 μm, the mechanical strength is poor, and when it exceeds 100 μm, the stability of the cell is lowered.
[0026]
Further, it is desirable that the multifeed preventing member of the present invention has a hardness of 50 ° or more, preferably 60 to 95 ° in Asker C. When the hardness of the double feed preventing member is less than 50 °, the frictional force becomes excessively large and tends to cause a paper feeding error.
[0027]
Further, when the multifeed preventing member is in a solit shape, a hardness (JIS A) of 50 ° or more, particularly 60 to 80 °, is an appropriate frictional force for separating the paper sheets.
[0028]
The paper sheet separating member of the present invention, when a plurality of paper sheets are inserted between the double feed prevention member and the feed roller, the paper sheet on the double feed prevention member side is in contact with the double feed prevention member, Receive friction. In the present invention, since this multifeed prevention member is made of a polyurethane rubber material obtained by reaction curing of the specific polyol and polyisocyanate, sufficient frictional force is imparted to the paper sheet, Double feeding is reliably prevented. Furthermore, this multi-feed prevention member can prevent “squeal” that occurs during the conveyance of paper sheets, and not only suppresses a decrease in the coefficient of friction against the paper sheets even when used for a long period of time. A friction coefficient suitable for conveyance according to the type can be maintained, and suitable paper sheet separation characteristics are exhibited regardless of the type of paper.
[0029]
Further, the paper sheet separating member of the present invention not only has excellent wear resistance, but also has a smooth surface, so even if the feed roller slides, wear of the feed roller can be suppressed, The fiber and paper dust of the paper sheet to be attached is difficult to adhere and does not contaminate the feed roller. Even if the feed roller is made of an oil-extended material, the paper sheet separating member does not swell.
[0030]
The invention after claim 2 of the present application is a requirement for making the above-described effect even more excellent in the invention of claim 1 above, and by combining these characteristics, friction coefficient maintaining characteristics and wear resistance are provided. Therefore, it is possible to provide a paper sheet separating member that is excellent in performance and has a remarkably excellent effect of preventing the occurrence of “squeal” and preventing contamination during printer printing.
[0031]
The multifeed preventing member of the present invention can take an arbitrary shape according to the shape and purpose of the apparatus. For example, as a method of providing unevenness, the inner surface of a mold for forming the multifeed preventing member (molding) It is possible to employ a method in which a surface is processed on the surface of the product and the surface is made by using the mold. Further, it is also possible to form irregularities by performing blasting such as sandblasting, rubbing the surface with a grindstone, or performing electric discharge machining.
[0032]
The multifeed preventing member of the present invention is essentially composed of the urethane rubber material, but various compounding agents such as an inorganic filler and carbon black can be added as long as the object of the invention is not impaired. .
For example, as the inorganic filler, talc or calcium carbonate is preferably used, which improves heat resistance, heat expansion resistance, chemical resistance, wear resistance, and has physical properties such as when silica is contained. There is no significant decline.
Further, the blending amount of the inorganic filler is not particularly limited. However, when talc is blended, 10 to 30 parts by weight with respect to 100 parts by weight of rubber, and when blending calcium carbonate, 80%. Or about 100 weight part is preferable in the point which exhibits the said effect more.
[0033]
【The invention's effect】
According to the present invention, the use of a specific polyurethane rubber material as a multi-feed preventing member for the paper sheet separating member prevents the occurrence of squeal, is excellent in heat resistance, heat expansion resistance, and chemical resistance, and is supplied. A paper sheet separating member having excellent paper characteristics can be provided.
[0034]
【Example】
Hereinafter, the present invention will be described by way of examples.
< Example 1 >
As a molding material, 100 parts by weight of polycaprolactone ester containing 63.4% by weight of caprolactone and having an average molecular weight of 2000 and 46 parts by weight of polyisocyanate were blended and reacted at 100 ° C. for 12 minutes to obtain a liquid polyurethane material. .
Next, after embracing bubbles in this liquid polyurethane material using a mechanical floss whose prepolymer RU-2600 is 100, as a curing agent, 1.4BD / TMP is 3.5 parts by weight of 85/15, 8.25 parts by weight of BHEB and 0.05 parts by weight of water were mixed and 11.8 parts by weight were added and poured into a mold heated to 120 ° C. and 100 minutes later, Asker C hardness was 85 °. Caprolactone urethane foamed molded product (multifeed prevention member) was taken out.
The obtained double feed prevention member was pressed against an EPDM feed roller with a load of 2.9 N, and a paper sheet was supplied between the double feed prevention member and the feed roller. After the passage of 50,000 sheets of paper, The occurrence of “squeal” was confirmed, and contamination resistance, coefficient of friction maintenance characteristics, wear resistance, and presence / absence of bloom were visually evaluated.
The results are shown in Table 1.
[0035]
< Example 2 >
The same procedure as in Example 1 was performed except that caprolactone-rolactone urethane having an Asker C hardness of 70 was used as the double feed prevention member. The results are shown in Table 1.
[0036]
< Example 3 >
The same procedure as in Example 1 was performed except that caprolactone-rolactone urethane having an Asker C hardness of 50 was used as the double feed prevention member. The results are shown in Table 1.
[0037]
< Comparative Example 1 >
This was carried out in the same manner as in Example 1 except that ether urethane having Asker C hardness 60 was used as the double feed preventing member. The results are shown in Table 1.
[0038]
< Comparative example 2 >
The same operation as in Example 1 was performed except that EPDM having an Asker C hardness of 80 was used as the double feed preventing member. The results are shown in Table 1.
[0039]
[Table 1]
< Examples 4 to 7, Comparative Examples 3 to 6 > The same procedure as in Example 1 was carried out, except that the rubber type, caprolactone content, and average molecular weight constituting the double feed preventing member were changed as shown in Table 2.
The results are shown in Table 2.
[0041]
[Table 2]
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15034298A JP3667993B2 (en) | 1998-05-29 | 1998-05-29 | Paper sheet separating member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15034298A JP3667993B2 (en) | 1998-05-29 | 1998-05-29 | Paper sheet separating member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11334915A JPH11334915A (en) | 1999-12-07 |
| JP3667993B2 true JP3667993B2 (en) | 2005-07-06 |
Family
ID=15494908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15034298A Expired - Fee Related JP3667993B2 (en) | 1998-05-29 | 1998-05-29 | Paper sheet separating member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3667993B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002255386A (en) * | 2001-02-27 | 2002-09-11 | Hokushin Ind Inc | Paper separating pad |
| JP4012838B2 (en) * | 2003-03-12 | 2007-11-21 | 株式会社リコー | Paper feeding device and image forming apparatus having the paper feeding device |
| JP4873470B2 (en) * | 2005-08-24 | 2012-02-08 | シンジーテック株式会社 | Feed separation member |
| WO2016158868A1 (en) * | 2015-03-31 | 2016-10-06 | バンドー化学株式会社 | Thermosetting urethane composition, cured article, and husking roll |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5999473A (en) * | 1982-11-29 | 1984-06-08 | Konishiroku Photo Ind Co Ltd | Electrophotographic copying machine |
| JPS6053740U (en) * | 1983-09-17 | 1985-04-16 | コニカ株式会社 | Paper feeding device |
| JPS6175750A (en) * | 1984-09-17 | 1986-04-18 | Ricoh Co Ltd | Automatic original text sheet supplying device |
| JP2928918B2 (en) * | 1990-05-31 | 1999-08-03 | 三洋化成工業株式会社 | Foamed polyurethane forming composition and molded article |
| JPH0556847U (en) * | 1992-01-17 | 1993-07-27 | 株式会社沖データシステムズ | Paper separation mechanism |
| JP3343690B2 (en) * | 1992-10-21 | 2002-11-11 | 日本発条株式会社 | Flexible closed cell polyurethane foam |
| JP2726608B2 (en) * | 1993-08-24 | 1998-03-11 | バンドー化学株式会社 | Cleaning blade for electrophotographic copier |
| JPH07112837A (en) * | 1993-10-18 | 1995-05-02 | Canon Inc | Paper feed device |
| JPH08166695A (en) * | 1994-12-13 | 1996-06-25 | Bridgestone Corp | Developing member |
| JP3513290B2 (en) * | 1995-11-02 | 2004-03-31 | キヤノン株式会社 | Sheet conveying device and automatic document reading device |
| JPH10101924A (en) * | 1996-10-03 | 1998-04-21 | Meisei Kagaku Kogyo Kk | Production of flame-retardant polyurethane elastomer |
-
1998
- 1998-05-29 JP JP15034298A patent/JP3667993B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11334915A (en) | 1999-12-07 |
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