JPH10279750A - Rubber composition consisting essentially of epdm polymer and rubber roller for paper feed using the same - Google Patents
Rubber composition consisting essentially of epdm polymer and rubber roller for paper feed using the sameInfo
- Publication number
- JPH10279750A JPH10279750A JP9087071A JP8707197A JPH10279750A JP H10279750 A JPH10279750 A JP H10279750A JP 9087071 A JP9087071 A JP 9087071A JP 8707197 A JP8707197 A JP 8707197A JP H10279750 A JPH10279750 A JP H10279750A
- Authority
- JP
- Japan
- Prior art keywords
- rubber composition
- oil
- rubber
- epdm polymer
- hydrocarbon
- 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.)
- Granted
Links
Landscapes
- Delivering By Means Of Belts And Rollers (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Handling Of Cut Paper (AREA)
- Paper Feeding For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はＥＰＤＭ（エチレン
−プロピレン−ジエン共重合体）ポリマーを主成分とす
るゴム組成物及びこれを用いたゴムローラに関し、特
に、軟化剤として配合するオイル成分のゴム表面への析
出を防止するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber composition containing EPDM (ethylene-propylene-diene copolymer) polymer as a main component and a rubber roller using the same, and more particularly to a rubber surface of an oil component blended as a softener. It is intended to prevent precipitation on the surface.
【０００２】[0002]
【従来の技術】静電式複写機、レーザプリンタ、ファク
シミリ等のＯＡ機器や、自動預金支払機などの紙送りロ
ーラに使用されるゴム組成物は、高い摩擦係数を有する
ことが要求されている。これは、繰り返しの使用によっ
てローラ表面が摩耗して摩擦係数が低下すると、これに
よってスリップが起こり、紙の搬送力が低下するためで
ある。このため、従来より、この種のゴム組成物として
機械的強度に優れたＥＰＤＭポリマーを主成分とするゴ
ム組成物が使用されている。特に、ＥＰＤＭポリマーは
耐オゾン性に優れ、電子写真法を用いた複写機やレーザ
プリンタ等の機内でオゾンを発生する画像形成装置の紙
送りローラに好適である。2. Description of the Related Art Rubber compositions used for OA equipment such as electrostatic copying machines, laser printers, and facsimile machines, and paper feed rollers for automatic teller machines are required to have a high coefficient of friction. . This is because, when the roller surface is worn due to repeated use and the coefficient of friction is reduced, a slip occurs, and the paper conveyance force is reduced. For this reason, a rubber composition mainly composed of an EPDM polymer having excellent mechanical strength has been used as this type of rubber composition. In particular, the EPDM polymer has excellent ozone resistance and is suitable for a paper feed roller of an image forming apparatus that generates ozone in a machine such as a copying machine or a laser printer using electrophotography.
【０００３】ところで、ＥＰＤＭポリマーを主成分とす
るゴム組成物を紙送りローラとして使用する場合、紙と
の間により高い摩擦力を得るために、ゴム組成物中にプ
ロセスオイルを配合してゴム組成物を軟化させている。
詳しくは、非油展のＥＰＤＭポリマーを用いる場合に
は、ゴム組成物中に非油展のＥＰＤＭポリマーとの相溶
性に優れるパラフィン系のプロセスオイルを配合してゴ
ム硬度を下げている（軟化させている）。また、油展の
ＥＰＤＭポリマーを用いる場合には、ＥＰＤＭポリマー
の重合段階でパラフィン系のプロセスオイルを配合して
ゴム硬度を下げているが、更に硬度を下げる目的で、パ
ラフィン系のオイルを配合することもできる。[0003] When a rubber composition containing an EPDM polymer as a main component is used as a paper feed roller, a process oil is mixed with the rubber composition to obtain a higher frictional force with paper. Softening things.
Specifically, when a non-oil-extended EPDM polymer is used, a rubber composition is mixed with a paraffin-based process oil having excellent compatibility with the non-oil-extended EPDM polymer to lower the rubber hardness (to soften the rubber). ing). In the case of using an oil-extended EPDM polymer, the rubber hardness is reduced by compounding a paraffinic process oil at the stage of polymerization of the EPDM polymer, but a paraffinic oil is compounded for the purpose of further lowering the hardness. You can also.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記プ
ロセスオイルを配合したＥＰＤＭポリマーのゴム組成物
からなる紙送りローラを使用した場合、紙送りを繰り返
し行うと、ゴムローラの表面にプロセスオイルが析出
（ブリード）して紙粉等が付着しやすくなり、紙とロー
ラとの摩擦力が低下して給紙搬送性が次第に低下してし
まうという問題点があった。また、ゴムローラの表面に
プロセスオイルが析出（ブリード）して、ゴム中のオイ
ル量が少なくなると、ゴムローラの硬度が高くなるとと
もに、コンパウンドとしての加硫促進剤等の残さに対す
る溶解度が低下して、ゴム中に配合しているプロセスオ
イル以外の加硫用添加剤等の他の添加剤が析出（ブルー
ム）しやすくなるという問題点があった。However, when a paper feed roller made of a rubber composition of EPDM polymer mixed with the above process oil is used, if the paper feed is repeated, the process oil deposits on the surface of the rubber roller (bleed). ), The paper powder and the like tend to adhere, the frictional force between the paper and the roller is reduced, and there is a problem that the paper feedability is gradually reduced. In addition, when process oil is precipitated (bleed) on the surface of the rubber roller and the amount of oil in the rubber is reduced, the hardness of the rubber roller is increased, and the solubility of the vulcanization accelerator and the like as a compound is reduced. There has been a problem that other additives such as a vulcanizing additive other than the process oil compounded in the rubber tend to precipitate (bloom).
【０００５】本発明は上記のような問題点を解消するた
めになされたものであり、ＥＰＤＭポリマーを主成分と
するゴム組成物であって、軟化剤をはじめとする添加剤
が表面に析出しにくいゴム組成物を提供し、併せて、安
定した紙送り性能を長期間維持できるゴムローラを提供
することを課題としている。The present invention has been made in order to solve the above-mentioned problems, and is a rubber composition containing an EPDM polymer as a main component, in which additives such as a softening agent are deposited on the surface. It is an object of the present invention to provide a rubber composition that is difficult to provide and a rubber roller that can maintain stable paper feeding performance for a long period of time.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するた
め、本発明は、請求項１で、ＥＰＤＭポリマーを主成分
とするゴム組成物であって、上記ＥＰＤＭポリマー１０
０重量部に対して炭化水素系合成油を１０〜５０重量部
配合してなることを特徴とするゴム組成物を提供してい
る。上記「ＥＰＤＭポリマー」は、油展ＥＰＤＭポリマ
ー及び非油展ＥＰＤＭポリマーのいずれか一方、または
両方を意味し、上記炭化水素系合成油の添加量（１０〜
５０重量部）は、ＥＰＤＭポリマーが非油展ＥＰＤＭポ
リマー単独の場合は、非油展ＥＰＤＭポリマー（１００
重量部）に対する添加量であり、ＥＰＤＭポリマーが油
展ＥＰＤＭポリマー単独の場合は、油展ＥＰＤＭポリマ
ーからオイル成分を差し引いたＥＰＤＭポリマー成分
（１００重量部）に対する添加量であり、ＥＰＤＭポリ
マーが油展ＥＰＤＭポリマーと非油展ＥＰＤＭポリマー
の混合物である場合は、油展ＥＰＤＭポリマーからオイ
ル成分を差し引いたＥＰＤＭポリマー成分と非油展ＥＰ
ＤＭポリマーのトータル量（１００重量部）に対する添
加量である。According to the present invention, there is provided a rubber composition comprising an EPDM polymer as a main component according to the present invention.
The present invention provides a rubber composition comprising 10 to 50 parts by weight of a hydrocarbon synthetic oil per 0 parts by weight. The “EPDM polymer” means one or both of an oil-extended EPDM polymer and a non-oil-extended EPDM polymer, and the addition amount of the hydrocarbon-based synthetic oil (10 to 10).
50 parts by weight) when the non-oil-extended EPDM polymer alone is the non-oil-extended EPDM polymer (100 parts by weight).
Parts by weight), and when the EPDM polymer is the oil-extended EPDM polymer alone, the amount is the amount added to the EPDM polymer component (100 parts by weight) obtained by subtracting the oil component from the oil-extended EPDM polymer. In the case of a mixture of an EPDM polymer and a non-oil-extended EPDM polymer, the EPDM polymer component obtained by subtracting the oil component from the oil-extended EPDM polymer and the non-oil-extended EP
This is the amount added to the total amount (100 parts by weight) of the DM polymer.
【０００７】上記構成とすると、炭化水素系合成油は、
ＥＰＤＭポリマーに比べてはるかに分子量が小さいため
にゴム組成物を十分に低硬度化（軟化）することができ
る。また、炭化水素系合成油はその数平均分子量（Ｍ
ｎ）と重量平均分子量（Ｍｗ）の比で表される分子量分
布（Ｍｎ／Ｍｗ）が同等の粘度のプロセスオイル（同等
の数平均分子量を有するプロセスオイル）のそれに比べ
て小さく、低分子成分が少なくなくなっている。よっ
て、炭化水素系合成油は析出しやすい低分子成分がプロ
セスオイルに比べて少ないために、ゴム組成物中に十分
に保持することができる。このため、加硫用添加剤等の
炭化水素系合成油以外の他の添加剤のゴム組成物中での
溶解度が減少せず、かかる他の添加剤のゴム組成物表面
への析出（ブルーム）も防止することができる。なお、
炭化水素系合成油の添加量を１０〜５０重量部としてい
るのは、５０重量部を越えるとゴム組成物中におけるポ
リマー成分（ＥＰＤＭポリマー）に対する炭化水素系合
成油の割合が大きくなり過ぎ、炭化水素系合成油がゴム
組成物表面への析出（ブリード）し、１０重量部未満で
はゴム組成物を充分に軟化させることができないためで
ある。With the above structure, the hydrocarbon-based synthetic oil is
Since the molecular weight is much smaller than that of the EPDM polymer, the rubber composition can be sufficiently reduced in hardness (softened). The hydrocarbon-based synthetic oil has a number average molecular weight (M
n) and the molecular weight distribution (Mn / Mw) expressed by the ratio of the weight average molecular weight (Mw) is smaller than that of the process oil of the same viscosity (process oil having the same number average molecular weight), It is getting less. Therefore, since the hydrocarbon-based synthetic oil has less low molecular components that are easily precipitated than the process oil, it can be sufficiently retained in the rubber composition. For this reason, the solubility of the additives other than the hydrocarbon-based synthetic oil, such as the vulcanizing additive, in the rubber composition does not decrease, and the other additives precipitate on the rubber composition surface (bloom). Can also be prevented. In addition,
The reason why the amount of the hydrocarbon synthetic oil is set to 10 to 50 parts by weight is that if the amount exceeds 50 parts by weight, the ratio of the hydrocarbon synthetic oil to the polymer component (EPDM polymer) in the rubber composition becomes too large, and This is because the hydrogen-based synthetic oil precipitates (bleeds) on the surface of the rubber composition, and if it is less than 10 parts by weight, the rubber composition cannot be sufficiently softened.
【０００８】上記炭化水素系合成油の粘度（ｃＳｔ／１
００℃）が１０〜２０００であるのが好ましい（請求項
２）。このようにすると、比較的少量（１０〜３０重量
部程度）の炭化水素系合成油で、十分にゴム組成物を軟
化させることができ、性能及びコストの点で好ましい結
果が得られる。The viscosity (cSt / 1) of the above hydrocarbon synthetic oil
(00 ° C.) is preferably from 10 to 2000 (claim 2). By doing so, the rubber composition can be sufficiently softened with a relatively small amount (about 10 to 30 parts by weight) of a hydrocarbon-based synthetic oil, and favorable results are obtained in terms of performance and cost.
【０００９】また、上記炭化水素系合成油が分子中に極
性基を有するものであるのが好ましい（請求項３）。こ
のようにすると、炭化水素系合成油と加硫用添加剤等の
炭化水素系合成油以外の他の添加剤とのゴム中での相溶
性が向上し、炭化水素系合成油以外の他の添加剤のゴム
組成物表面への析出（ブルーム）がより起こりにくくな
る。It is preferable that the hydrocarbon synthetic oil has a polar group in the molecule. By doing so, the compatibility of the hydrocarbon-based synthetic oil with other additives other than the hydrocarbon-based synthetic oil such as a vulcanizing additive in rubber is improved, and other additives other than the hydrocarbon-based synthetic oil are used. Precipitation (bloom) of the additive on the rubber composition surface is less likely to occur.
【００１０】また、請求項４で、請求項１〜３のいずれ
かに記載のゴム組成物をローラ状に成形してなる紙送り
用ゴムローラを提供している。According to a fourth aspect of the present invention, there is provided a paper feeding rubber roller formed by molding the rubber composition according to any one of the first to third aspects into a roller shape.
【００１１】このような紙送り用ゴムローラでは、紙と
の間に高い摩擦力が得られ、しかも、ローラ表面にゴム
組成物中の軟化剤等の添加剤が析出することがないの
で、紙との間の高い摩擦力を長期間維持することがで
き、長期にわたって安定した紙搬送性を得ることができ
る。[0011] In such a paper feeding rubber roller, a high frictional force is obtained between the paper and the paper, and additives such as a softening agent in the rubber composition do not precipitate on the roller surface. , A high frictional force can be maintained for a long time, and stable paper transportability can be obtained for a long time.
【００１２】[0012]
【発明の実施の形態】本発明において、ＥＰＤＭポリマ
ーは、それ自体公知のものを使用でき、上記したよう
に、油展ＥＰＤＭポリマー及び非油展ＥＰＤＭポリマー
のいずれか一方、または双方を使用することができる。
油展ＥＰＤＭポリマーを用いる場合、ポリマー中に炭化
水素系合成油以外のオイル分を若干量含んでいてもよい
が、オイル分として炭化水素系合成油のみを油展した油
展ＥＰＤＭポリマーを使用するのが好ましい。ＥＰＤＭ
ポリマーのジエン成分は特に限定されず、エチリデンノ
ルボルネン（ＥＮＢ）、ジシクロペンタジエン（ＤＣＰ
Ｄ）等のいずれであってもよい。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, as the EPDM polymer, any known EPDM polymer can be used. As described above, either one or both of the oil-extended EPDM polymer and the non-oil-extended EPDM polymer can be used. Can be.
When an oil-extended EPDM polymer is used, the polymer may contain a small amount of oil other than the hydrocarbon-based synthetic oil, but an oil-extended EPDM polymer in which only the hydrocarbon-based synthetic oil is oil-extended is used as the oil component. Is preferred. EPDM
The diene component of the polymer is not particularly limited, and ethylidene norbornene (ENB), dicyclopentadiene (DCP)
D) and the like.
【００１３】ＥＰＤＭポリマー（油展ＥＰＤＭポリマー
を含む場合はオイル分を除くポリマー分）はゴム組成物
全体当たり２０〜８０重量％、好ましくは３０〜６０重
量％配合する。これは、ＥＰＤＭポリマーの配合量が上
記２０重量％より少なくなると、ＥＰＤＭポリマーを使
用する本来の目的、すなわち、ゴム組成物の機械的強度
を向上させ、かつ、耐オゾン性を向上させるという目的
を外れてしまうためである。The EPDM polymer (the polymer component excluding the oil component when the oil-extended EPDM polymer is contained) is blended in an amount of 20 to 80% by weight, preferably 30 to 60% by weight based on the whole rubber composition. This is because when the blending amount of the EPDM polymer is less than 20% by weight, the original purpose of using the EPDM polymer, that is, the purpose of improving the mechanical strength of the rubber composition and improving the ozone resistance. It is because it comes off.
【００１４】炭化水素系合成油は、炭化水素系オリゴマ
ーからなるそれ自体公知の合成油を使用できる。例え
ば、α−オレフィンのオリゴマー、ブテンのオリゴマ
ー、エチレンとα−オレフィンとのオリゴマー等を挙げ
ることができるが、特にエチレンとα−オレフィンとの
非晶質オリゴマーが好ましい。この炭化水素系合成油の
分子量分布（Ｍｎ／Ｍｗ）は、ゲルパーミエーションク
ロマトグラフィー（ＧＰＣ）による測定値で、一般に
１．２〜１．８、好ましくは１．４〜１．６である。特
に、粘度（ｃＳｔ／１００℃）が１０〜２０００、好ま
しくは１００〜２０００、より好ましく１５０〜２００
０の範囲にあるものがよい。これは粘度（ｃＳｔ／１０
０℃）が１０以上であるとゴム組成物中での保持性が高
く、析出（ブリード）の防止効果がより向上するためで
ある。しかし、粘度が２０００を越える程度まで高くな
ると、ゴム組成物を十分に軟化させるためにはゴム組成
物中に多量の合成油を添加しなければならなくなる。な
お、数平均分子量は（ＧＰＣ）による測定値で５６０〜
３４００の範囲にあるのが好ましく、これよりも大きく
なると粘度が大きくなる傾向を示し、これよりも小さく
なる粘度が小さくなる傾向を示す。As the hydrocarbon-based synthetic oil, a known synthetic oil comprising a hydrocarbon-based oligomer can be used. For example, an oligomer of α-olefin, an oligomer of butene, an oligomer of ethylene and α-olefin, and the like can be given, and an amorphous oligomer of ethylene and α-olefin is particularly preferable. The molecular weight distribution (Mn / Mw) of the hydrocarbon synthetic oil is generally from 1.2 to 1.8, preferably from 1.4 to 1.6, as measured by gel permeation chromatography (GPC). In particular, the viscosity (cSt / 100 ° C.) is 10 to 2000, preferably 100 to 2000, more preferably 150 to 200.
Those in the range of 0 are preferred. This is the viscosity (cSt / 10
(0 ° C.) is 10 or more because the retention in the rubber composition is high and the effect of preventing precipitation (bleed) is further improved. However, when the viscosity is increased to a level exceeding 2,000, a large amount of synthetic oil must be added to the rubber composition in order to sufficiently soften the rubber composition. The number average molecular weight was 560 to 560 as measured by (GPC).
It is preferably in the range of 3400, and when it is higher than this, the viscosity tends to increase, and when it is lower than this, the viscosity tends to decrease.
【００１５】炭化水素系合成油はＥＰＤＭポリマー１０
０重量部に対して１０〜５０重量部、好ましくは１０〜
３０重量部添加する。炭化水素系合成油の添加量が１０
重量部未満の場合、ゴム組成物が軟化せず、また、ゴム
組成物の誘電正接（ｔａｎδ）が低下して、紙送りロー
ラとした時に紙との間に充分な摩擦力を得ることができ
なくなる。５０重量部を越えるとゴム組成物中における
ポリマー成分（ＥＰＤＭポリマー）に対する炭化水素系
合成油の割合が大きくなり過ぎ、炭化水素系合成油がゴ
ム組成物表面へ析出（ブリード）してしまう。The hydrocarbon-based synthetic oil is EPDM polymer 10
10 to 50 parts by weight, preferably 10 to 50 parts by weight per 0 parts by weight
Add 30 parts by weight. When the amount of hydrocarbon-based synthetic oil added is 10
When the amount is less than parts by weight, the rubber composition does not soften, and the dielectric loss tangent (tan δ) of the rubber composition decreases, so that a sufficient frictional force can be obtained between the rubber composition and the paper when the paper feed roller is used. Disappears. If the amount exceeds 50 parts by weight, the ratio of the hydrocarbon synthetic oil to the polymer component (EPDM polymer) in the rubber composition becomes too large, and the hydrocarbon synthetic oil precipitates (bleeds) on the rubber composition surface.
【００１６】また、炭化水素系合成油として分子中に例
えばカルボキシル基（−ＣＯＯＨ）、水酸基（−Ｏ
Ｈ）、アミノ基（−ＮＨ2 ）等の極性基を導入したもの
を用いると、加硫用添加剤等のゴム組成物中に配合する
炭化水素系合成油以外の他の添加剤との相溶性が向上
し、加硫用添加剤等がゴム組成物表面へより析出（ブル
ーム）しにくくなる。このような極性基を有する炭化水
素系合成油はその酸価（ｍｇＫ／ｇ、ＪＩＳ−Ｋ２５０
１）が１〜１００、好ましくは２５〜１００であるもの
を用いるのがよい。これは酸価が１より小さい場合、炭
化水素系合成油以外の他の添加剤との相溶性が向上し難
く、１００を越えるとＥＰＤＭポリマーとの相溶性が悪
くなるためである。Further, as a hydrocarbon synthetic oil, a carboxyl group (—COOH), a hydroxyl group (—O
H), when a polar group such as an amino group (-NH 2 ) is introduced, a phase with other additives other than the hydrocarbon-based synthetic oil blended in the rubber composition such as a vulcanizing additive is used. The solubility is improved, and the vulcanizing additive and the like hardly precipitate (bloom) on the surface of the rubber composition. The hydrocarbon-based synthetic oil having such a polar group has an acid value (mgK / g, JIS-K250).
It is good to use what 1) is 1-100, preferably 25-100. This is because when the acid value is less than 1, the compatibility with other additives other than the hydrocarbon-based synthetic oil is hardly improved, and when the acid value exceeds 100, the compatibility with the EPDM polymer becomes poor.
【００１７】本発明において、ＥＰＤＭポリマーを主成
分とするゴム組成物は、ＥＰＤＭポリマーに、充填剤、
軟化剤としての炭化水素系合成油、加硫用添加剤（加硫
剤、加硫促進剤、加硫促進補助剤、加硫遅延剤等）、可
塑剤、老化防止剤等を配合して混練し、これを加硫する
ことにより得られる。そして、このようにして得られた
ゴム組成物を常法により所望のローラ形状に成形するこ
とにより紙送り用のゴムローラを得ることができる。In the present invention, a rubber composition containing an EPDM polymer as a main component is obtained by adding a filler,
Compounding and kneading a hydrocarbon synthetic oil as a softener, additives for vulcanization (vulcanizing agents, vulcanization accelerators, vulcanization accelerating aids, vulcanization retarders, etc.), plasticizers, antioxidants, etc. It is obtained by vulcanizing it. Then, the rubber composition thus obtained is formed into a desired roller shape by a conventional method, whereby a rubber roller for paper feeding can be obtained.
【００１８】上記充填剤としては、例えば、酸化チタ
ン、シリカ、カーボンブラック、クレー、タルク等が挙
げられる。Examples of the filler include titanium oxide, silica, carbon black, clay, and talc.
【００１９】上記した各成分の混練は、ロール，ニーダ
ー等の混練機を８０〜１２０℃程度に加熱したときは、
ゴム組成物の混練性が向上するために好ましい。The above components are kneaded when a kneader such as a roll or kneader is heated to about 80 to 120 ° C.
It is preferable because the kneadability of the rubber composition is improved.
【００２０】[0020]
【実施例】以下、本発明を実施例及び比較例に基づいて
説明する。 （実施例１）油展ＥＰＤＭポリマー（住友化学（株）
製、エスプレン５０５Ａ（商品名））１００重量部に、
軟化剤としてのエチレンとα−オレフィンとの非晶質オ
リゴマーからなる炭化水素系合成油（三井石油化学
（株）製、ルーカント ＨＣ−１５０（商品名））３０
重量部、充填剤としてのシリカ（日本シリカ（株）製、
ニプシール（商品名））１０重量部、ステアリン酸（日
本油脂（株）製）１重量部、酸化亜鉛（三井金属鉱業
（株）製）５重量部、硫黄（鶴見化学工業（株））２重
量部、加硫促進剤（大内新興化学製 ノクセラー ＣＺ
（商品名））１重量部、加硫促進剤（大内新興化学製
ノクセラー ＴＥＴ（商品名））０．３重量部を配合
し、混練機（５５Ｌ二−ダー）を用いて１２０℃で混練
して、ゴム組成物を製造した。The present invention will be described below based on examples and comparative examples. (Example 1) Oil-extended EPDM polymer (Sumitomo Chemical Co., Ltd.)
Manufactured by Esplen 505A (trade name))
Hydrocarbon synthetic oil composed of amorphous oligomer of ethylene and α-olefin as a softening agent (Lucant HC-150 (trade name) manufactured by Mitsui Petrochemical Co., Ltd.) 30
Parts by weight, silica as filler (manufactured by Nippon Silica Co., Ltd.
Nipsil (trade name)) 10 parts by weight, stearic acid (manufactured by NOF Corporation) 1 part by weight, zinc oxide (manufactured by Mitsui Kinzoku Mining Co., Ltd.) 5 parts by weight, sulfur (Tsurumi Chemical Industry Co., Ltd.) 2 parts by weight , Vulcanization accelerator (Noxeller CZ manufactured by Ouchi Shinko Chemical)
(Trade name) 1 part by weight, vulcanization accelerator (Ouchi Shinko Chemical
0.3 parts by weight of Noxeller TET (trade name) were mixed and kneaded at 120 ° C. using a kneader (55 L kneader) to produce a rubber composition.
【００２１】そして、上記ゴム組成物を押し出した後、
ゴムローラの形状に対応する金型を用いて、１６０℃、
３０分間の条件で加硫、成形して、外径１９ｍｍ、内径
９ｍｍ、幅１０ｍｍのゴムローラＡを作製した。After extruding the rubber composition,
Using a mold corresponding to the shape of the rubber roller,
The rubber roller A having an outer diameter of 19 mm, an inner diameter of 9 mm, and a width of 10 mm was produced by vulcanization and molding under the conditions of 30 minutes.
【００２２】（実施例２〜７、比較例１〜３）下記表１
に示すように、上記実施例１の処方を基本にし、軟化剤
の種類、添加量を変更して実施例２〜７及び比較例１〜
３のゴム組成物を製造し、それぞれのゴム組成物につい
て上記と同様にしてゴムローラを作製した。これらゴム
ローラを順にゴムローラＢ〜Ｊとした。(Examples 2 to 7, Comparative Examples 1 to 3)
As shown in Examples 2 to 7 and Comparative Examples 1 to 7 by changing the type and the amount of the softener based on the formulation of Example 1 described above.
The rubber compositions of No. 3 were produced, and a rubber roller was produced for each rubber composition in the same manner as described above. These rubber rollers are referred to as rubber rollers B to J in order.
【００２３】[0023]
【表１】 [Table 1]
【００２４】＊１ 三井石油化学（株）製、ルーカント
ＨＣ−１５０ 組成：エチレンとα−オレフィンとの非晶質オリゴマー 数平均分子量（Ｍｎ）：１６００ 分子量分布（Ｍｎ／Ｍｗ）：２．０ 粘度（ｃＳｔ／１００℃）：１５０ 酸価 ：０* 1 manufactured by Mitsui Petrochemical Co., Ltd., Lucant HC-150 Composition: amorphous oligomer of ethylene and α-olefin Number average molecular weight (Mn): 1600 Molecular weight distribution (Mn / Mw): 2.0 Viscosity (CSt / 100 ° C): 150 Acid value: 0
【００２５】＊２ 三井石油化学（株）製、ルーカント
ＨＣ−１０ 組成：エチレンとα−オレフィンとの非晶質オリゴマー 数平均分子量（Ｍｎ）：５６０ 分子量分布（Ｍｎ／Ｍｗ）：１．４ 粘度（ｃＳｔ／１００℃）：１０ 酸価 ：０* 2 Lucent HC-10, manufactured by Mitsui Petrochemical Co., Ltd. Composition: amorphous oligomer of ethylene and α-olefin Number average molecular weight (Mn): 560 Molecular weight distribution (Mn / Mw): 1.4 viscosity (CSt / 100 ° C): 10 Acid value: 0
【００２６】＊３ 三井石油化学（株）製、ルーカント
Ａ−５５１５ 組成：エチレンとα−オレフィンとの非晶質オリゴマー
の側鎖にカルボキシル基を導入 数平均分子量（Ｍｎ）：１６００ 分子量分布（Ｍｎ／Ｍｗ）：２．０ 粘度（ｃＳｔ／１００℃）：１５０ 酸価 ：６２* 3 Lucent A-5515, manufactured by Mitsui Petrochemical Co., Ltd. Composition: Carboxyl group introduced into side chain of amorphous oligomer of ethylene and α-olefin Number average molecular weight (Mn): 1600 Molecular weight distribution (Mn) / Mw): 2.0 Viscosity (cSt / 100 ° C): 150 Acid value: 62
【００２７】＊４ 三井石油化学（株）製、ルーカント
Ａ−５３２０Ｈ 組成：エチレンとα−オレフィンとの非晶質オリゴマー
の側鎖にカルボキシル基を導入 数平均分子量（Ｍｎ）：３４００ 粘度（ｃＳｔ／１００℃）：２０００ 分子量分布（Ｍｎ／Ｍｗ）：２．０ 酸価 ：３０* 4 Lucent A-5320H manufactured by Mitsui Petrochemical Co., Ltd. Composition: Carboxyl group introduced into side chain of amorphous oligomer of ethylene and α-olefin Number average molecular weight (Mn): 3400 viscosity (cSt / c) 100 ° C): 2000 Molecular weight distribution (Mn / Mw): 2.0 Acid value: 30
【００２８】＊５ 三井石油化学（株）製、ルーカント
Ａ−５２１５ 組成：エチレンとα−オレフィンとの非晶質オリゴマー
の側鎖にカルボキシル基を導入 数平均分子量（Ｍｎ）：１６００ 分子量分布：２．０ 粘度（ｃＳｔ／１００℃）：１５０ 酸価 ：２４* 5 Lucent A-5215, manufactured by Mitsui Petrochemical Co., Ltd. Composition: Carboxyl group introduced into side chain of amorphous oligomer of ethylene and α-olefin Number average molecular weight (Mn): 1600 Molecular weight distribution: 2 0.0 viscosity (cSt / 100 ° C): 150 acid value: 24
【００２９】＊６ 出水興産（株）製、ダイアナプロセ
スオイル ＰＷ−９０ 組成：カーボンタイプ比（ＣA ：ＣN ：ＣP ）＝０：２
９．０：７１．０ 数平均分子量（Ｍｎ）：５３９ ＊７ 大内新興化学製、ノクセラー ＣＺ ＊８ 大内新興化学製、ノクセラー ＴＥＴ* 6 Diana Process Oil PW-90, manufactured by Izumi Kosan Co., Ltd. Composition: Carbon type ratio (C A : C N : C P ) = 0: 2
9.0: 71.0 Number average molecular weight (Mn): 539 * 7 Ouchi Shinko Chemical, Noxeller CZ * 8 Ouchi Shinko Chemical, Noxeller TET
【００３０】上記作製したゴムローラＡ〜Ｊについて以
下に記す各評価試験を行った。 通紙試験 電子写真複写機に上記作製したゴムローラを取りつけ、
温度２３℃、湿度５５％の条件下で、荷重２５０ｇをか
けて、Ａ４の電子写真複写機用普通紙（ＰＰＣ用紙）を
１００，０００枚を５時間かけて通紙し、通紙後のゴム
ローラ表面のブルーム状態を目視で観察し、５段階で評
価した。 （ブルーム有り）１←→５（ブルーム無）The rubber rollers A to J produced above were subjected to the following evaluation tests. Paper passing test Attach the rubber roller prepared above to the electrophotographic copying machine,
Under conditions of a temperature of 23 ° C. and a humidity of 55%, a load of 250 g was applied, and 100,000 sheets of A4 plain paper for electrophotographic copying machines (PPC paper) were passed for 5 hours. The state of bloom on the surface was visually observed and evaluated on a five-point scale. (With bloom) 1 ← → 5 (without bloom)
【００３１】摩擦係数測定試験 図１に示すように、ゴムローラ１とプレート３との間
に、ロードセル５に接続したＡ４のＰＰＣ用紙をはさ
み、ゴムローラ１の回転軸２に荷重を加え、図中黒矢印
で示すようにゴムローラ１をプレート３に圧接（荷重Ｗ
＝２５０ｇ）させた。次いで、温度２３℃、湿度５５％
の条件下で、上記ゴムローラ１を図中実線の矢印ａで示
す方向に、周速３００ｍｍ／秒で回転させ、通紙の前後
において図中白矢印で示す方向に発生した力Ｆ（ｇ）を
ロードセル５によって測定した。そして、この測定値Ｆ
（ｇ）と荷重Ｗ（＝２５０ｇ）とから下記式により摩擦
係数μを求めた。この摩擦係数μを、上記ゴムローラＡ
〜Ｊのそれぞれについて、上記通紙試験を行う前と行っ
た後で測定した。 μ＝Ｆ（ｇ）／Ｗ（ｇ）Friction coefficient measurement test As shown in FIG. 1, an A4 PPC sheet connected to a load cell 5 was sandwiched between a rubber roller 1 and a plate 3, and a load was applied to a rotating shaft 2 of the rubber roller 1. As shown by the arrow, the rubber roller 1 is pressed against the plate 3 (load W
= 250 g). Next, at a temperature of 23 ° C. and a humidity of 55%
Under the conditions described above, the rubber roller 1 is rotated at a peripheral speed of 300 mm / sec in the direction indicated by the solid arrow a in the figure, and the force F (g) generated in the direction indicated by the white arrow in the figure before and after paper passing is obtained. It was measured by the load cell 5. And this measured value F
(G) and the load W (= 250 g), the friction coefficient μ was determined by the following equation. The friction coefficient μ is calculated by using the rubber roller A
ＪJ were measured before and after the paper passing test was performed. μ = F (g) / W (g)
【００３２】オイル分抽出試験 ゴムローラをアセトン中で２４時間還流し、ゴムローラ
の重量原料分をオイル分抽出量とした。このオイル分抽
出量を、上記ゴムローラＡ〜Ｊのそれぞれについて上記
通紙試験を行う前と行った後で測定した。Oil Extraction Test The rubber roller was refluxed in acetone for 24 hours, and the raw material weight of the rubber roller was used as the oil extraction amount. The oil extraction amount was measured before and after the paper passing test was performed on each of the rubber rollers A to J.
【００３３】外観試験 上記ゴムローラＡ〜Ｊの作製直後の状態（新品状態）を
目視で観察した。以上の試験結果を下記表２に示す。Appearance test The state immediately after the production of the rubber rollers A to J (new state) was visually observed. The test results are shown in Table 2 below.
【００３４】[0034]
【表２】 [Table 2]
【００３５】表２から明かなように、実施例のゴムロー
ラＡ〜Ｅはいずれも作製直後の新品状態においてオイル
の析出（ブリード）がなく、紙との間に高い摩擦係数を
得ることができ、しかも、１００，０００枚の通紙を行
っても摩擦係数が大きく低下したり、オイルや加硫促進
剤等の薬品が多く析出することなく、長期間安定した紙
搬送力が得られることが分かる。As is clear from Table 2, all of the rubber rollers A to E of the embodiment have no oil precipitation (bleed) in a new state immediately after production, and can obtain a high friction coefficient with paper. In addition, even when 100,000 sheets are passed, the coefficient of friction is not greatly reduced, and a large amount of chemicals such as oil and vulcanization accelerator are not deposited. .
【００３６】これに対し、比較例１の軟化剤としてプロ
セスオイルを用いたゴムローラＨは１００，０００枚の
通紙によりオイルの析出（ブリード）及び加硫促進剤等
の薬品の析出（ブルーム）が顕著に発生し、紙との摩擦
係数が大きく低下してしまうことがわかる。また、比較
例２のゴムローラＩは合成油の添加量が少な過ぎるた
め、ローラを充分に軟化できず、通紙初期から紙との摩
擦係数が小さく、安定した紙搬送力が得られないことが
分かる。また、比較例３のゴムローラＪは合成油の添加
量が多すぎるため、作製直後の新品状態においてオイル
の析出（ブリード）が認められ、これの影響で通紙初期
から紙との摩擦係数が小さく、安定した紙搬送力が得ら
れないことが分かる。On the other hand, the rubber roller H using the process oil as the softening agent of Comparative Example 1 showed the precipitation of oil (bleed) and the precipitation of chemicals such as the vulcanization accelerator (bloom) after passing 100,000 sheets. It can be seen that it occurs remarkably, and the coefficient of friction with paper greatly decreases. In addition, the rubber roller I of Comparative Example 2 had too little synthetic oil added, so that the roller could not be sufficiently softened, had a low coefficient of friction with paper from the beginning of paper passing, and could not obtain a stable paper conveying force. I understand. In addition, the rubber roller J of Comparative Example 3 had too much synthetic oil added, so that oil precipitation (bleed) was observed in a new state immediately after the production, and the friction coefficient with the paper was small from the initial stage of paper feeding due to this effect. It can be seen that stable paper conveyance force cannot be obtained.
【００３７】[0037]
【発明の効果】以上のように、本発明のゴム組成物によ
れば、ＥＰＤＭポリマーを主成分とするゴム組成物であ
って、ＥＰＤＭポリマー１００重量部に対して炭化水素
系合成油を１０〜５０重量部配合してなるものとしたこ
とにより、軟化剤として炭化水素系合成油がゴム組成物
中に保持されて析出することなくゴム組成物が充分に軟
化し、かつ、ゴム組成物中の加硫促進剤等の他の添加剤
の析出も防止することができる。よって、かかるゴム組
成物をローラ状に成形したゴムローラは長期にわたって
紙との間に高い摩擦係数を得ることができ、長期間安定
した紙搬送性を示すものとなる。As described above, according to the rubber composition of the present invention, it is a rubber composition containing an EPDM polymer as a main component. By blending 50 parts by weight, the rubber composition is sufficiently softened as a hydrocarbon-based synthetic oil as a softening agent without being retained and precipitated in the rubber composition, and in the rubber composition. Precipitation of other additives such as a vulcanization accelerator can also be prevented. Therefore, a rubber roller formed of such a rubber composition into a roller shape can obtain a high friction coefficient with paper for a long period of time, and exhibits stable paper transportability for a long period of time.
【図面の簡単な説明】[Brief description of the drawings]
【図１】 ゴムローラの摩擦係数を測定するための装置
の概略を説明する図である。FIG. 1 is a diagram schematically illustrating an apparatus for measuring a friction coefficient of a rubber roller.
１ ゴムローラ 1 Rubber roller
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｇ０３Ｇ 15/00 ５１０ Ｇ０３Ｇ 15/00 ５１０ // Ｂ４１Ｊ 13/076 Ｂ４１Ｊ 13/076 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI G03G 15/00 510 G03G 15/00 510 // B41J 13/076 B41J 13/076
Claims (4)
成物であって、上記ＥＰＤＭポリマー１００重量部に対
して炭化水素系合成油を１０〜５０重量部配合してなる
ことを特徴とするゴム組成物。1. A rubber composition comprising an EPDM polymer as a main component, comprising 10 to 50 parts by weight of a hydrocarbon synthetic oil per 100 parts by weight of the EPDM polymer. Stuff.
１００℃）が１０〜２０００である請求項１または２に
記載のゴム組成物。2. The viscosity (cSt / c) of the hydrocarbon synthetic oil.
The rubber composition according to claim 1 or 2, wherein the rubber composition (100 ° C) is 10 to 2000.
を有するものである請求項１または２に記載のゴム組成
物。3. The rubber composition according to claim 1, wherein the hydrocarbon-based synthetic oil has a polar group in a molecule.
成物をローラ状に成形してなる紙送り用ゴムローラ。4. A paper feed rubber roller formed by molding the rubber composition according to claim 1 into a roller shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08707197A JP3355107B2 (en) | 1997-04-04 | 1997-04-04 | Rubber roller for paper feed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08707197A JP3355107B2 (en) | 1997-04-04 | 1997-04-04 | Rubber roller for paper feed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10279750A true JPH10279750A (en) | 1998-10-20 |
| JP3355107B2 JP3355107B2 (en) | 2002-12-09 |
Family
ID=13904721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08707197A Expired - Fee Related JP3355107B2 (en) | 1997-04-04 | 1997-04-04 | Rubber roller for paper feed |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3355107B2 (en) |
Cited By (7)
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|---|---|---|---|---|
| WO2002031044A1 (en) * | 2000-10-12 | 2002-04-18 | Duraban Oy | Polyalphaolefin plastisizers for elastomers |
| CN104292663A (en) * | 2014-09-25 | 2015-01-21 | 天津昕中和胶业有限公司 | Ethylene propylene diene monomer rubber capable of alleviating colour fusion and preparation method of ethylene propylene diene monomer rubber |
| JP2015189870A (en) * | 2014-03-28 | 2015-11-02 | 三井化学株式会社 | Resin composition and rubber roller |
| JP2016102157A (en) * | 2014-11-28 | 2016-06-02 | 三井化学株式会社 | Water dispersion composition |
| WO2016190421A1 (en) * | 2015-05-27 | 2016-12-01 | 横浜ゴム株式会社 | Rubber composition and pneumatic tire using same |
| CN107567473A (en) * | 2015-07-13 | 2018-01-09 | 和仁化学株式会社 | It is injection moulded rubber composition |
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1997
- 1997-04-04 JP JP08707197A patent/JP3355107B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002031044A1 (en) * | 2000-10-12 | 2002-04-18 | Duraban Oy | Polyalphaolefin plastisizers for elastomers |
| JP2015189870A (en) * | 2014-03-28 | 2015-11-02 | 三井化学株式会社 | Resin composition and rubber roller |
| CN104292663A (en) * | 2014-09-25 | 2015-01-21 | 天津昕中和胶业有限公司 | Ethylene propylene diene monomer rubber capable of alleviating colour fusion and preparation method of ethylene propylene diene monomer rubber |
| JP2016102157A (en) * | 2014-11-28 | 2016-06-02 | 三井化学株式会社 | Water dispersion composition |
| WO2016190421A1 (en) * | 2015-05-27 | 2016-12-01 | 横浜ゴム株式会社 | Rubber composition and pneumatic tire using same |
| CN107567473A (en) * | 2015-07-13 | 2018-01-09 | 和仁化学株式会社 | It is injection moulded rubber composition |
| JP2018521147A (en) * | 2015-07-13 | 2018-08-02 | ファインケミカル カンパニー リミテッド | Rubber composition for injection molding |
| EP3279253A4 (en) * | 2015-07-13 | 2018-10-24 | Fine Chemical Co., Ltd. | Injection molding rubber composition |
| US10400095B2 (en) | 2015-07-13 | 2019-09-03 | Fine Chemical Co., Ltd. | Rubber composition for injection molding |
| JP2020075948A (en) * | 2018-11-05 | 2020-05-21 | 三井化学株式会社 | Resin composition and manufacturing method, and molded body thereof |
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| Publication number | Publication date |
|---|---|
| JP3355107B2 (en) | 2002-12-09 |
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