JP4707126B2 - Non-adhesive rubber composition - Google Patents
Non-adhesive rubber composition Download PDFInfo
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- JP4707126B2 JP4707126B2 JP34616898A JP34616898A JP4707126B2 JP 4707126 B2 JP4707126 B2 JP 4707126B2 JP 34616898 A JP34616898 A JP 34616898A JP 34616898 A JP34616898 A JP 34616898A JP 4707126 B2 JP4707126 B2 JP 4707126B2
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- Prior art keywords
- rubber
- rubber composition
- crystalline polyethylene
- adhesion
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Description
【０００１】
【発明の属する技術分野】
本発明は、例えば、コンベアベルト、パッキン用ゴム、ライニング用ゴム、敷物用ゴム等の板状加硫ゴム製品等の表面の滑り性を改良し、加硫後のゴムの表面同士が密着することのない非密着化ゴム組成物に関する。
【０００２】
【従来の技術】
一般に、ゴムを加硫した直後のゴム表面はその滑り性が悪く、例えばコンベアベルト等の製品を出荷のためにドラム状に巻き取り搬入する場合に、これらの製品の引き取り先では該製品を引き出す際に加硫ゴムの表面同士が密着してしまい、これらの製品を使用するまでの時間や作業性が著しく大変であることが多々ある。また、パッキン用ゴム板などの場合にはドラム状に巻き取られたゴムシートを引き出す際にゴムシート同士の密着、あるいはパッキン材として打ち抜き加工した後梱包する場合にパッキン同士の密着のため製品の梱包に多大の工数がかかる等の作業が発生する。更には、上記加硫ゴム表面の密着によりあるいはモールドの汚れ等によって外観上艶むらが発生したりする問題も解決する必要がある。
【０００３】
この現象を防止するために、加硫ゴム製品を得た後に、これらのゴム製品の表面に各種の離型剤を塗布したり、離型用シートを挟み込んで出荷したりしている場合が多い。一例を挙げれば、液状シリコーンを塗ったり、ポリエチレン等の、粉末を塗布したり、あるいはまた、テフロンシートやポリエチレンシート等の、ゴム表面に対して剥がれ易いシートを挟み込むこと等によってこれら製品の表面同士の密着を防いでいる。
【０００４】
【発明が解決しようとする課題】
しかしながら、液状シリコーンを塗る方法の場合、表面がベタついてしまい感触も悪く、密着対策としても完璧とはいい難く、またポリエチレン粉末等や鉱物系粉末等についても、通常加硫後製品表面に塗布するが、搬送中に徐々に落ちてきたり、手に付着したりして密着性にむらが出来たり外観上も好ましい状態にならない。更にテフロンやポリエチレンのシートを挟み込む方法では、使用先での使用・加工の際にこのシートを取り除くための工数が大であり、また必ずしも滑り性がなく、更にはこれらのシートの廃棄や処理の問題も発生する。
【０００５】
そこで本発明の目的は、加硫ゴム表面の滑り性に優れ、加硫後のゴムの表面同士の密着を防ぐことのできる非密着化ゴム組成物を提供することにある。
【０００６】
【課題を解決するための手段】
本発明者は、上記課題を解決すべく鋭意検討した結果、ゴム組成物に結晶性ポリエチレンの粉末を配合することにより加硫後のゴム表面の滑り性が良好となり、加硫ゴムの表面同士の密着を防ぐことができることを見出し、本発明を完成するに至った。
【０００７】
即ち、本発明は、加硫後のゴムの表面同士が密着することのない非密着化ゴム組成物において、
結晶性ポリエチレンの粉末が配合されてなり、
前記結晶性ポリエチレンの分子量が５００〜７００の範囲内であり、かつ、前記結晶性ポリエチレンの粉末の添加量がゴム成分１００重量部に対して２〜５０重量部であることを特徴とするものである。
【０００９】
【発明の実施の形態】
以下、本発明の非密着化ゴム組成物について詳述する。
本発明において使用し得る結晶性ポリエチレンは、分岐構造がない高い直線性を有し、各種ポリマーに対し、特に室温において溶解度の低い脂肪族炭化水素である。したがって、加硫後にゴム表面に析出してゴム表面の滑り性を向上させ、加硫ゴムの表面同士の密着を防止することができる。この結晶性ポリエチレンの分子量は、前記析出を良好に行わしめる上で５００〜７００の範囲内であり、その分子量分布は狭いことが好ましい。かかる結晶性ポリエチレンは、市場で入手することができ、例えば、商品名ポリワックス５００、ポリワックス６５５（いずれも東洋ペトロライト（株）製）のもの、あるいは商品名ＷＰ７５（ニッカ（株）製）でポリワックス６５５の粉末品を好適に用いることができる。
【００１０】
上記結晶性ポリエチレンの添加量はゴム成分１００重量部に対して２〜５０重量部の範囲内であることが好ましく、２重量部未満では加硫ゴム表面同士の密着防止効果が十分とはいえず、一方５０重量部を超えるとゴム組成物本来の特性に影響を及ぼすおそれが出てくるため、好ましくない。
【００１１】
本発明のゴム組成物に用いられるゴムポリマーの種類としては、天然ゴム、スチレンブタジエンゴム、ポリブタジエンゴム、ポリイソプレンゴム等のジエンゴム、クロロプレンゴム、ブチルゴム、エチレンプロピレンゴム、ＥＶＡ、ウレタンゴム、クロロスルフォン化ゴム、フッ素ゴム、エピクロルヒドリンゴム、アクリルゴム、カルボキシル化ゴム、ビニルピリジンゴム、塩素化ポリエチレン等、幅広く用いることができる。
【００１２】
本発明のゴム組成物には上記成分の他、従来よりゴム組成物の添加剤として使用されている、軟化剤、カーボンブラックやシリカ等の補強材、充填材、加工助剤、老化防止剤、加硫促進剤等を適宜配合することができるのは勿論のことである。
【００１３】
【実施例】
次に本発明を実施例に基づき説明する。
下記の表１および表２に示す配合内容（重量部）に従い、各種ゴム組成物を調製した。得られたゴム組成物に対し、下記の測定試験を実施した。
１）密着力
図１に示すシンポ工業（株）製プッシュプルゲージ１を用い、設置した試料３、４の１ｃｍ２あたりの処理面同士の密着力を測定した。具体的には２００ｇの荷重２をかけ、５秒間圧着した後、４０ｍ／秒速度で戻し、そのときの密着力を測定した。
【００１４】
２）静摩擦係数
ＡＳＴＭ平面圧子、ＡＳＴＭ Ｄ１８９４に準じ、試験機はＨＥＩＤＯＮ−１４型を用いて静摩擦係数を測定した。得られた結果を下記の表１および表２に示す。
【００１５】
【表１】
【表２】
【発明の効果】
以上説明してきたように本発明の非密着化ゴム組成物においては、加硫ゴム表面の滑り性に優れ、加硫後のゴム表面同士の密着を防ぐことができる。
【図面の簡単な説明】
【図１】密着力の試験方法を示す説明図である。
【符号の説明】
１ プッシュプルゲージ
２ 荷重
３ 試料
４ 試料[0001]
BACKGROUND OF THE INVENTION
The present invention, for example, improves the slipperiness of the surface of a plate-like vulcanized rubber product such as a conveyor belt, packing rubber, lining rubber, rug rubber, etc., and the rubber surfaces after vulcanization are in close contact with each other The present invention relates to a non-adhesive rubber composition having no adhesion.
[0002]
[Prior art]
Generally, the rubber surface immediately after vulcanizing the rubber has poor slipperiness. For example, when a product such as a conveyor belt is wound up in a drum for shipping, the product is pulled out at the destination of the product. In many cases, the surfaces of the vulcanized rubbers are in close contact with each other, and the time and workability until these products are used are often extremely difficult. Also, in the case of rubber plates for packing, etc., the rubber sheets are wound together when pulling out the rubber sheet wound in a drum shape, or when packing after stamping as a packing material, Work that takes a lot of man-hours for packing occurs. Furthermore, it is necessary to solve the problem of uneven gloss on appearance due to adhesion of the vulcanized rubber surface or dirt on the mold.
[0003]
In order to prevent this phenomenon, after obtaining vulcanized rubber products, various release agents are often applied to the surface of these rubber products, or a release sheet is sandwiched before shipment. . For example, the surfaces of these products may be applied by applying liquid silicone, applying a powder such as polyethylene, or sandwiching a sheet that easily peels off the rubber surface, such as a Teflon sheet or a polyethylene sheet. To prevent close contact.
[0004]
[Problems to be solved by the invention]
However, in the case of the method of applying liquid silicone, the surface is sticky and feels bad, and it is difficult to say that it is perfect as an adhesion measure. Also, polyethylene powder and mineral powder are usually applied to the product surface after vulcanization. However, it gradually falls during conveyance or adheres to the hand, resulting in uneven adhesion, and the appearance is not favorable. Furthermore, the method of sandwiching a Teflon or polyethylene sheet requires a large number of man-hours for removing the sheet at the time of use and processing at the user's site, and is not necessarily slippery. Problems also arise.
[0005]
Accordingly, an object of the present invention is to provide a non-adhesive rubber composition which is excellent in slipping property on the surface of a vulcanized rubber and which can prevent adhesion between vulcanized rubber surfaces.
[0006]
[Means for Solving the Problems]
As a result of intensive studies to solve the above-mentioned problems, the present inventors have improved the slipperiness of the rubber surface after vulcanization by blending the crystalline polyethylene powder into the rubber composition. It has been found that adhesion can be prevented, and the present invention has been completed.
[0007]
That is, the present invention is a non-adhesive rubber composition in which the surfaces of rubber after vulcanization do not adhere to each other,
Crystalline polyethylene powder is blended,
The molecular weight of the crystalline polyethylene is in the range of 500 to 700, and the addition amount of the crystalline polyethylene powder is 2 to 50 parts by weight with respect to 100 parts by weight of the rubber component. is there.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the non-adhesive rubber composition of the present invention will be described in detail.
The crystalline polyethylene that can be used in the present invention is an aliphatic hydrocarbon that has high linearity without a branched structure and has low solubility in various polymers, particularly at room temperature. Therefore, it can be deposited on the rubber surface after vulcanization to improve the slipperiness of the rubber surface, and the adhesion between the surfaces of the vulcanized rubber can be prevented. The molecular weight of the crystalline polyethylene is preferably in the range of 500 to 700 in order to perform the precipitation well, and the molecular weight distribution is preferably narrow. Such crystalline polyethylene can be obtained on the market, for example, those of trade name Polywax 500, Polywax 655 (both manufactured by Toyo Petrolite Co., Ltd.), or trade name WP75 (produced by Nikka Co., Ltd.). Thus, a powder product of polywax 655 can be preferably used.
[0010]
The amount of the crystalline polyethylene added is preferably in the range of 2 to 50 parts by weight with respect to 100 parts by weight of the rubber component, and if less than 2 parts by weight, the effect of preventing adhesion between the vulcanized rubber surfaces is not sufficient. On the other hand, if it exceeds 50 parts by weight, the inherent properties of the rubber composition may be affected.
[0011]
The types of rubber polymers used in the rubber composition of the present invention include natural rubber, styrene butadiene rubber, polybutadiene rubber, polyisoprene rubber and other diene rubbers, chloroprene rubber, butyl rubber, ethylene propylene rubber, EVA, urethane rubber, chlorosulfonated Rubber, fluoro rubber, epichlorohydrin rubber, acrylic rubber, carboxylated rubber, vinyl pyridine rubber, chlorinated polyethylene, etc. can be used widely.
[0012]
In addition to the above components, the rubber composition of the present invention has been conventionally used as an additive for rubber compositions, softeners, reinforcing materials such as carbon black and silica, fillers, processing aids, anti-aging agents, Of course, a vulcanization accelerator and the like can be appropriately blended.
[0013]
【Example】
Next, this invention is demonstrated based on an Example.
Various rubber compositions were prepared according to the contents (parts by weight) shown in Tables 1 and 2 below. The following measurement test was implemented with respect to the obtained rubber composition.
1) Adhesion force Using a push-pull gauge 1 manufactured by Simpo Industry Co., Ltd. shown in FIG. 1, the adhesion force between the treated surfaces per 1 cm 2 of the installed
[0014]
2) Coefficient of static friction According to ASTM flat indenter, ASTM D1894, the tester measured the coefficient of static friction using HEIDON-14 type. The obtained results are shown in Tables 1 and 2 below.
[0015]
[Table 1]
[Table 2]
【The invention's effect】
As described above, in the non-adhesive rubber composition of the present invention, the vulcanized rubber surfaces are excellent in slipperiness, and adhesion between the vulcanized rubber surfaces can be prevented.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a test method for adhesion force.
[Explanation of symbols]
1 Push-
Claims (1)
結晶性ポリエチレンの粉末が配合されてなり、
前記結晶性ポリエチレンの分子量が５００〜７００の範囲内であり、かつ、前記結晶性ポリエチレンの粉末の添加量がゴム成分１００重量部に対して２〜５０重量部であることを特徴とする非密着化ゴム組成物。In the non-adhering rubber composition in which the surfaces of the rubber after vulcanization do not adhere to each other,
Crystalline polyethylene powder is blended,
Non, wherein the molecular weight of the crystalline polyethylene Ri der range of 500 to 700, and the addition amount of the powder of the crystalline polyethylene is from 2 to 50 parts by weight per 100 parts by weight of the rubber component Adhesive rubber composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34616898A JP4707126B2 (en) | 1998-12-04 | 1998-12-04 | Non-adhesive rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34616898A JP4707126B2 (en) | 1998-12-04 | 1998-12-04 | Non-adhesive rubber composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000169633A JP2000169633A (en) | 2000-06-20 |
| JP4707126B2 true JP4707126B2 (en) | 2011-06-22 |
Family
ID=18381581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34616898A Expired - Fee Related JP4707126B2 (en) | 1998-12-04 | 1998-12-04 | Non-adhesive rubber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4707126B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104277343A (en) * | 2013-07-09 | 2015-01-14 | 日立金属株式会社 | Chlorinated polyethylene composition, wire, cable and the method for producing the chlorinated polyethylene composition |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106674680B (en) * | 2015-11-06 | 2020-07-24 | 中国石油化工股份有限公司 | Polyethylene composition and high density polyethylene articles and methods of making the same |
| CN110713640B (en) * | 2018-07-13 | 2022-08-09 | 杭州星庐科技有限公司 | Rubber composition and processing method, and rubber product and production method using same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX9302561A (en) * | 1992-05-06 | 1994-07-29 | Bridgestone Corp | EPDM / EPR COMPOSITION FILLED WITH MINERAL FOR WHITE SIDE COMPOUNDS. |
| JPH07233289A (en) * | 1994-02-24 | 1995-09-05 | Showa Denko Kk | Flexible resin composition |
| JPH08225712A (en) * | 1994-11-09 | 1996-09-03 | Denki Kagaku Kogyo Kk | Block copolymer composition and its heat-shrinkable film |
| JPH08210515A (en) * | 1995-02-06 | 1996-08-20 | Kiipaa Kk | Boot for machine shaft joint |
| JPH0987431A (en) * | 1995-07-18 | 1997-03-31 | Bridgestone Corp | Polymer alloy composition for waterproof sheet |
-
1998
- 1998-12-04 JP JP34616898A patent/JP4707126B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104277343A (en) * | 2013-07-09 | 2015-01-14 | 日立金属株式会社 | Chlorinated polyethylene composition, wire, cable and the method for producing the chlorinated polyethylene composition |
| CN104277343B (en) * | 2013-07-09 | 2017-10-17 | 日立金属株式会社 | Chlorinated polyethylene composition, electric wire, the manufacture method of cable and chlorinated polyethylene composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000169633A (en) | 2000-06-20 |
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