JP4513216B2 - Method for producing patterned rubber sheet - Google Patents
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- JP4513216B2 JP4513216B2 JP2001048683A JP2001048683A JP4513216B2 JP 4513216 B2 JP4513216 B2 JP 4513216B2 JP 2001048683 A JP2001048683 A JP 2001048683A JP 2001048683 A JP2001048683 A JP 2001048683A JP 4513216 B2 JP4513216 B2 JP 4513216B2
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Description
【０００１】
【発明の属する技術分野】
本発明は、模様入りゴムシートの製造方法に関し、詳しくは、例えば、スケート場のリンク周辺、スパイク付シューズを使用する競技場の控え部分などに床敷物として使用される模様入りゴムシートの製造方法に関する。
【０００２】
【従来の技術】
従来より、模様入りゴムシートとして、タイル状のもの（大きさは通常１０００ｍｍ角以下）が知られている。斯かるタイル状の模様入りゴムシートは、加硫剤が配合され且つ所定長さに切断された生ゴムシートの表面に着色加硫ゴム粒子を散布し、次いで、プレス等の型内で加熱加圧処理し、生ゴムシートの加硫と共に着色加硫ゴム粒子の埋め込みを行う方法によって製造される。
【０００３】
ところで、従来の模様入りゴムシートにおいては、生ゴムシートの中に着色加硫ゴム粒子が埋め込まれる際に着色加硫ゴム粒子に同伴された空気が一緒に埋没される。その結果、ゴムシートに埋設された着色加硫ゴム粒子の周辺に部分的にボイドが形成され、しかも、空気の巻き込みによるクレータ（巻き込まれた空気によって凸状になったゴム粒子）が形成される。そして、これにより、商品価値が損なわれ且つ色加硫ゴム粒子が脱落し易いという問題がある。
【０００４】
【発明が解決しようとする課題】
本発明は、上記実情に鑑みなされたものであり、その目的は、ゴムシートに着色加硫ゴム粒子が埋め込まれた模様入りゴムシートの製造方法であって、生ゴムシートの中に着色加硫ゴム粒子が埋め込まれる際に着色加硫ゴム粒子に同伴されて一緒に埋没されんとする空気を除去することが出来る様に改良された模様入りゴムシートの製造方法を提供することにある。
【０００５】
【課題を解決するための手段】
本発明は、上記実情に鑑み鋭意検討を重ねた結果、加熱加圧処理の際に比較的簡単な手段を採用することにより、上記の目的を容易に達成し得るとの知見を得、本発明の完成に至った。
【０００６】
すなわち、本発明の要旨は、加硫剤が配合された生ゴムシートの表面に着色加硫ゴム粒子を散布し、次いで、加熱加圧処理によって生ゴムシートの加硫と共に着色加硫ゴム粒子の埋め込みを行う模様入りゴムシートの製造方法において、着色加硫ゴム粒子が散布された生ゴムシートのゴム粒子散布面側に粗面シートを介在させて、加熱加圧処理装置の加熱ロールと耐熱性エンドレスベルトの間に連続的に供給して加熱加圧処理を行った後、粗面シートを剥離することを特徴とする模様入りゴムシートの製造方法に存する。
【０００７】
【発明の実施の形態】
以下、本発明を詳細に説明する。本発明で使用するゴムは、特に制限されず、例えば、天然ゴム、ブチルゴム、ハロゲン化ブチルゴム、アクリルゴム、イソプレンゴム、ブタジエンゴム、クロロプレンゴム、クロロスルフォン化ポリエチレン、ウレタンゴム、多硫化ゴム、フッ素ゴム、シリコーンゴム、エピクロルヒドリンゴム、エチレン−プロピレンゴム、エチレン−アクリルゴム、スチレン−ブタジエンゴム、エチレン−プロピレン−ジエンゴム、アクリルニトリル−ブタジエンゴム、ニトリルゴム−塩化ビニル樹脂ブレンド、ニトリルゴム／ＥＰＤＭブレンド等が挙げられる。
【０００８】
加硫剤が配合された生ゴムシートは、概略的に言えば、素練り、混錬、成形などの工程より成る公知の方法で得られる。加硫剤としては、特に制限されないが、コストの点から硫黄が好適に使用される。生ゴムシートは、二酸化チタン、酸化亜鉛、硫化亜鉛、リトポン等の白色顔料やその他の有色顔料の配合により、グレー、ライトブルー等に着色することも出来る。上記の白色顔料の中では隠蔽力に優れる二酸化チタンが好適に使用される。更に、生ゴムシートには、上記の他、加硫促進剤、加硫促進助剤、補強材、充填剤、難燃剤、老化防止剤、酸化防止剤、紫外線吸収剤、粘着付与剤、可塑剤、滑剤、発泡剤、帯電防止剤、カップリング剤、防腐剤、防カビ剤などが含まれていてもよい。
【０００９】
一方、着色加硫ゴム粒子（以下、単にゴム粒子という）は、基本的には上記と同様の工程の後に、加硫、冷却、粉砕、篩分などの工程が付加された公知の方法で得られる。この際に使用される着色剤としては、無機顔料、有機顔料などが挙げられるが、通常は無機顔料が使用される。無機顔料の具体例としては、酸化鉄（茶・褐色）、クロム酸鉛、紺青、カーボンブラク等が挙げられる。上記の様な製造工程において、加硫剤の使用量などにより硬度が異なるゴム粒子が得られ、粉砕および篩分の条件により粒径が異なるゴム粒子が得られる。
【００１０】
本発明においては、加硫剤が配合された生ゴムシートの表面にゴム粒子を散布し、次いで、加熱加圧処理によって生ゴムシートの加硫と共にゴム粒子の埋め込みを行う。この際、生ゴムシートは、例えば、表面層と下地層に分けた複層構造としてもよく、層間に布などの他の材料のシート（フイルム）を挟み込んでもよい。通常、上記の様な複層構造においては、表面層のみに白色顔料などが配合されて意匠性が付与される。また、ゴム粒子が埋め込まれて形成される意匠面の反対面（複層構造の場合は下地層の外表面）は、接着施工の便宜性を考慮して布目などの凹凸を設けるのが好ましい。
【００１１】
本発明の最大の特徴は、生ゴムシートのゴム粒子散布面側に粗面シートを介在させて加熱加圧処理を行う点にある。
【００１２】
加熱加圧処理による生ゴムシートの加硫およびゴム粒子の埋め込みは次の様に行われると考えられる。すなわち、先ず、加圧により生ゴムシートは圧縮されて薄く変形され且つゴム粒子が存在する部分は当該ゴム粒子を通して掛かる圧力により陥没した様に変形する。通常、生ゴムシートに掛かる圧力は約５〜１０Ｋｇ／ｃｍ2であり、加圧状態の生ゴムシートの厚さは元の厚さの約７０〜９０％となる。次いで、加熱により生ゴムシートが軟化して陥没変形していた生ゴムシートの中にゴム粒子が埋め込まれる。同時に加硫開始温度に漸次近づくに従って加硫が行われて生ゴムシートが加硫ゴムシートに変化する。そして、最終的には加硫ゴムシートの中にゴム粒子が面一致の深さまで埋め込まれて模様入りゴムシートとなる。
【００１３】
そして、本発明者の知見によれば、上記の様な加熱加圧処理において、生ゴムシートのゴム粒子散布面側に粗面シートを介在させて加熱加圧処理するならば、生ゴムシートの中にゴム粒子が埋め込まれる際にゴム粒子に同伴された空気が一粗面シートの隙間から脱気され、その埋没が防止される。その結果、ゴム粒子の周辺へのボイド形成が一層防止され、しかも、空気の巻き込みによるクレータ（巻き込まれた空気によって凸状になったゴム粒子）の形成が防止される。
【００１４】
粗面シートとしては、表面に凹凸を備え且つ可撓性と寸法安定性（耐熱性）が良好であれば如何なる材料のシートであってもよく、具体的には、布、不織布、凹凸加工された紙または樹脂シート等が挙げられる。凹凸の程度は表面粗度Ｒａとして、通常１０〜２００μｍ、好ましくは１０〜５０μｍとされる。粗面シートの厚さは、通常０．０１〜５ｍｍ、好ましくは０．１〜１ｍｍである。また、粗面シートは、加熱加圧処理後において加硫ゴムシートからの剥離を容易にするため、離型剤処理して使用される。
【００１５】
上記の加熱加圧処理は、従来公知の方法と同様に所定長さに切断された生ゴムシートを使用する非連続法で行うことも出来るが、長尺の生ゴムシートをそのまま使用する連続法が好ましい。すなわち、非連続法で得られるタイル状製品は、製造設備のサイズによって製品サイズが限定されるために施行に手間が掛かり、また、継目の個所が多くなるに意匠性に欠ける。これに対し、長尺の生ゴムシートをそのまま使用する連続法の場合は、上記の様な問題が回避される。
【００１６】
本発明において、上記の様な連続法としては、生ゴムシートにプレスで使用される雄型の様な加熱加圧装置を押し当てる方法、具体的には、生ゴムシートの走行と停止とを繰り返して停止時に加熱加圧装置を降下させて生ゴムシートに押し当てる方法、加熱加圧装置を生ゴムシートの走行速度と同一速度で走行させつつ降下させて生ゴムシートに押し当てる方法などを採用することも出来るが、加熱加熱ロールと耐熱性エンドレスベルとから成る加圧処理装置を使用する方法、すなわち、ゴム粒子が散布された生ゴムシートを加熱加圧処理装置の加熱ロールと耐熱性エンドレスベルとの間に連続的に供給して加熱加圧処理を行う方法が推奨される。
【００１７】
図１は本発明の好ましい態様の一例の説明図であり、上記の加圧処理装置を使用する方法である。図１に例示した加熱加圧処理装置は、基本的には、上下に配置されたテンションロール（６１）及び（６２）、その後方の中間高さに配置された加熱ロール（７）、更にその後方の同一高さに配置されたテンションロール（６３）、これらの各ロールに巻回された耐熱性エンドレスベルト（例えばスチール製エンドレスベルト）（５）から成る。
【００１８】
そして、図１に例示した加熱加圧処理装置においては、加熱ロールと耐熱性エンドレスベルの間に供給される生ゴムシートのゴム粒子散布面側に粗面シート（４）を介在させる手段として、粗面シート供給ロール（４Ａ）及び粗面シート引取ロール（４Ｂ）と耐熱性エンドレスベルト（５）に接して配置されたタッチロール（８２）を備えている。
【００１９】
図１に示す方法は次の様に行われる。先ず、表面層用および下地層用として、各生ゴムシートロール（１Ａ）及び（１Ｂ）から引き出された各生ゴムシート（１ａ）及び（１ｂ）は案内ロール（８１）で一体化される。そして、上記の一体化された生ゴムシート（１）の表面にホッパー（８）からゴム粒子（２）を散布する。この散布は、適宜の手段により、生ゴムシート（１）幅方向に一定量のゴム粒子（２）が散布される様に行う。ゴム粒子の粒径は、加熱加圧処理前の生ゴムシートの厚さの通常５〜７０％に相当する大きさとされる。
【００２０】
次いで、ゴム粒子（２）が散布された生ゴムシート（１）を加熱加圧処理装置の加熱ロール（７）と耐熱性エンドレスベルト（５）の間に連続的に供給し、生ゴムシート（１）のゴム粒子散布面側に粗面シート（４）を介在させる。加熱処理温度（加硫温度）は、使用する加硫剤の種類および量ならびに加熱処理時間によって適宜選択される。例えば、加硫剤として生ゴムシートに対して０．１〜５重量％の硫黄を使用した場合は１５０〜１８０℃の温度が推奨される。加熱加圧処理で得られた模様入りゴムシート（３）は、粗面シート（４）の剥離の後、製品ロール（３Ａ）としてロール状に巻き取られる。
【００２１】
【実施例】
以下、本発明を実施例により更に詳細に説明するが、本発明は、その要旨を超えない限り、以下の実施例に限定されるものではない。
【００２２】
実施例１
図１に示す方法に従い、以下の表１〜３に記載の原料を使用して模様入りゴムシートを製造した。この際、粗面シートとしては、表面粗度Ｒａ２５μｍ、厚さ１９５μｍの離型剤処理された紙シートを使用した。
【００２３】
【表１】
【表２】
【表３】
【表４】
上記の各生ゴムシート（１ａ）及び（１ｂ）が一体化された生ゴムシート（１）の表面にゴム粒子（２）を散布し、加熱ロール（７）と耐熱性エンドレスベルト（５）の間に連続的に供給し、同時に、生ゴムシート（１）のゴム粒子散布面側に粗面シート（４）を介在させて加圧加熱処理を行った。得られた模様入りゴムシート（３）を製品ロール（３Ａ）としてロール状に巻き取った。この際、一体化された生ゴムシート（１）の厚さは１２．４ｍｍであり、加熱圧縮により１０．３ｍｍに変形された。ゴム粒子（２）の散布量は７０ｇ／ｍ2とし、加熱ロール（７）の表面温度は１７５℃とした。得られた模様入りゴムシート（３）の厚さは１２．４ｍｍであった。
【００２８】
上記の模様入りゴムシート（３）について、表面の目視観察により、ゴムシートに埋設されたゴム粒子の周辺のボイド及び空気の巻き込みによるクレータの有無を調査した。調査は、１５０×１５０ｍｍの表面について、埋設されたゴム粒子の全数と周辺にボイドが形成されたゴム粒子の数とクレータの数とを計測することによって行った。その結果、埋設されたゴム粒子の全数は２８０個、周辺にボイドが形成されたゴム粒子の数は０個、クレータの数は０であった。
【００２９】
【発明の効果】
以上説明した本発明によれば、生ゴムシートの中に着色加硫ゴム粒子が埋め込まれる際に着色加硫ゴム粒子に同伴されて一緒に埋没されんとする空気を除去することが出来る様に改良された模様入りゴムシートの製造方法が提供され、本発明の工業的価値は大きい。
【図面の簡単な説明】
【図１】本発明の好ましい態様の一例の説明図
【符号の説明】
１Ａ：生ゴムシートロール
１Ｂ：生ゴムシートロール
１ａ：生ゴムシート
１ｂ：生ゴムシート
１：生ゴムシート
２：着色加硫ゴム粒子
３：模様入りゴムシート
４Ａ：粗面シート供給ロール
４Ｂ：粗面シート引取ロール
４：粗面シート
５：耐熱性エンドレスベルト
６１：テンションロール
６２：テンションロール
６３：テンションロール
７：加熱ロール
８：ホッパー
８１：案内ロール
８２：タッチロール[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method for manufacturing a patterned rubber sheet, and more specifically, for example, a method for manufacturing a patterned rubber sheet used as a floor covering around a rink of a skate rink, a stadium refuge using a spiked shoe, and the like. About.
[0002]
[Prior art]
Conventionally, as a rubber sheet with a pattern, a tile-like thing (a size is usually 1000 mm square or less) is known. Such a tiled patterned rubber sheet is formed by spraying colored vulcanized rubber particles on the surface of a raw rubber sheet blended with a vulcanizing agent and cut to a predetermined length, and then heated and pressed in a mold such as a press. It is manufactured by a method of treating and embedding colored vulcanized rubber particles together with vulcanization of the raw rubber sheet.
[0003]
By the way, in the conventional patterned rubber sheet, when the colored vulcanized rubber particles are embedded in the raw rubber sheet, the air accompanying the colored vulcanized rubber particles is buried together. As a result, voids are partially formed around the colored vulcanized rubber particles embedded in the rubber sheet, and craters (rubber particles that are convex by the entrained air) are formed by entrainment of air. . And there exists a problem that a commercial value is impaired by this and a color vulcanized rubber particle tends to drop out.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and an object thereof is a method for producing a patterned rubber sheet in which colored vulcanized rubber particles are embedded in a rubber sheet, and the colored vulcanized rubber is contained in a raw rubber sheet. An object of the present invention is to provide an improved method for producing a patterned rubber sheet so that air entrained together with colored vulcanized rubber particles can be removed when the particles are embedded.
[0005]
[Means for Solving the Problems]
As a result of intensive studies in view of the above circumstances, the present invention has obtained knowledge that the above object can be easily achieved by adopting a relatively simple means during the heat and pressure treatment. It was completed.
[0006]
That is, the gist of the present invention is to spray colored vulcanized rubber particles on the surface of a raw rubber sheet containing a vulcanizing agent, and then embed the colored vulcanized rubber particles together with vulcanization of the raw rubber sheet by heat and pressure treatment. the method of manufacturing a patterned containing rubber sheet to perform, with intervening roughened sheet to the rubber particle spread side side of the raw rubber sheet colored vulcanized rubber particles are sprayed, the heating roll and heat-resistant endless belt hot pressing apparatus after continuously supplying Tsu line heat pressure treatment during resides in with patterns production method of the rubber sheet, which comprises peeling the rough surface sheet.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail. The rubber used in the present invention is not particularly limited. For example, natural rubber, butyl rubber, halogenated butyl rubber, acrylic rubber, isoprene rubber, butadiene rubber, chloroprene rubber, chlorosulfonated polyethylene, urethane rubber, polysulfide rubber, fluorine rubber , Silicone rubber, epichlorohydrin rubber, ethylene-propylene rubber, ethylene-acrylic rubber, styrene-butadiene rubber, ethylene-propylene-diene rubber, acrylonitrile-butadiene rubber, nitrile rubber-vinyl chloride resin blend, nitrile rubber / EPDM blend, etc. It is done.
[0008]
Generally speaking, the raw rubber sheet in which the vulcanizing agent is blended can be obtained by a known method comprising steps such as mastication, kneading and molding. Although it does not restrict | limit especially as a vulcanizing agent, Sulfur is used suitably from the point of cost. The raw rubber sheet can be colored in gray, light blue, etc. by blending white pigments such as titanium dioxide, zinc oxide, zinc sulfide, lithopone and other colored pigments. Among the above white pigments, titanium dioxide having excellent hiding power is preferably used. Furthermore, in addition to the above, the raw rubber sheet includes a vulcanization accelerator, a vulcanization acceleration aid, a reinforcing material, a filler, a flame retardant, an anti-aging agent, an antioxidant, an ultraviolet absorber, a tackifier, a plasticizer, A lubricant, a foaming agent, an antistatic agent, a coupling agent, an antiseptic, an antifungal agent and the like may be contained.
[0009]
On the other hand, colored vulcanized rubber particles (hereinafter simply referred to as rubber particles) are obtained by a known method in which steps such as vulcanization, cooling, pulverization, and sieving are basically added after the same steps as described above. It is done. Examples of the colorant used at this time include inorganic pigments and organic pigments, and inorganic pigments are usually used. Specific examples of the inorganic pigment include iron oxide (brown / brown), lead chromate, bitumen, carbon black and the like. In the manufacturing process as described above, rubber particles having different hardness are obtained depending on the amount of the vulcanizing agent used, and rubber particles having different particle diameters are obtained depending on the conditions of pulverization and sieving.
[0010]
In the present invention, rubber particles are dispersed on the surface of a raw rubber sheet containing a vulcanizing agent, and then the raw rubber sheet is vulcanized and embedded with rubber particles by heat and pressure treatment. At this time, the raw rubber sheet may have, for example, a multi-layer structure divided into a surface layer and an underlayer, or a sheet (film) of another material such as cloth may be sandwiched between the layers. Usually, in the multilayer structure as described above, a white pigment or the like is blended only in the surface layer to impart design properties. Further, it is preferable that the opposite surface of the design surface formed by embedding the rubber particles (the outer surface of the base layer in the case of a multilayer structure) is provided with unevenness such as a texture in consideration of the convenience of bonding.
[0011]
The greatest feature of the present invention is that the heat and pressure treatment is performed with a rough sheet interposed on the rubber particle-spreading surface side of the raw rubber sheet.
[0012]
It is considered that vulcanization of raw rubber sheets and embedding of rubber particles by heat and pressure treatment are performed as follows. That is, first, the raw rubber sheet is compressed and thinly deformed by pressurization, and the portion where the rubber particles are present is deformed as if it is depressed by the pressure applied through the rubber particles. Usually, the pressure applied to the raw rubber sheet is about 5 to 10 kg / cm 2 , and the thickness of the pressed raw rubber sheet is about 70 to 90% of the original thickness. Next, the rubber particles are embedded in the raw rubber sheet that has been deformed by the softening of the raw rubber sheet by heating. At the same time, as the temperature gradually approaches the vulcanization start temperature, vulcanization is performed and the raw rubber sheet changes to a vulcanized rubber sheet. Finally, the rubber particles are embedded in the vulcanized rubber sheet to a surface matching depth to form a patterned rubber sheet.
[0013]
And according to the knowledge of the present inventors, in the heat and pressure treatment as described above, if the heat and pressure treatment is performed by interposing a rough surface sheet on the rubber particle spraying side of the raw rubber sheet, When the rubber particles are embedded, the air entrained by the rubber particles is degassed from the gap between the rough sheets, and the embedding is prevented. As a result, the formation of voids around the rubber particles is further prevented, and the formation of craters (rubber particles that are convex by the entrained air) due to the entrainment of air is prevented.
[0014]
The rough sheet may be a sheet made of any material as long as it has irregularities on the surface and has good flexibility and dimensional stability (heat resistance). Examples thereof include paper or resin sheets. The degree of unevenness is usually 10 to 200 μm, preferably 10 to 50 μm, as the surface roughness Ra. The thickness of the rough sheet is usually from 0.01 to 5 mm, preferably from 0.1 to 1 mm. Further, the rough sheet is used after being treated with a release agent in order to facilitate peeling from the vulcanized rubber sheet after the heat and pressure treatment.
[0015]
The heating and pressurizing treatment can be performed by a non-continuous method using a raw rubber sheet cut to a predetermined length as in a conventionally known method, but a continuous method using a long raw rubber sheet as it is is preferable. . That is, the tile-shaped product obtained by the discontinuous method is troublesome to implement because the product size is limited by the size of the manufacturing equipment, and lacks design properties as the number of joints increases. On the other hand, in the case of the continuous method in which a long raw rubber sheet is used as it is, the above problems are avoided.
[0016]
In the present invention, as a continuous method as described above, a method of pressing a heating and pressing device such as a male mold used in a press against a raw rubber sheet, specifically, running and stopping of the raw rubber sheet are repeated. It is also possible to adopt a method in which the heating and pressing device is lowered and pressed against the raw rubber sheet when stopped, or a method in which the heating and pressing device is lowered and pressed against the raw rubber sheet while running at the same speed as the running speed of the raw rubber sheet. However, a method of using a pressure treatment device comprising a heating and heating roll and a heat-resistant endless bell, that is, a raw rubber sheet on which rubber particles are dispersed is placed between the heating roll and the heat-resistant endless bell of the heating and pressure treatment device. A method of continuously supplying and heating and pressing is recommended.
[0017]
FIG. 1 is an explanatory view of an example of a preferred embodiment of the present invention, which is a method of using the pressure treatment apparatus described above. 1 basically includes tension rolls (61) and (62) arranged above and below, a heating roll (7) arranged at an intermediate height behind the tension rolls (61) and (62), and thereafter A tension roll (63) arranged at the same height, and a heat-resistant endless belt (for example, a steel endless belt) (5) wound around each of these rolls.
[0018]
In the heat and pressure treatment apparatus illustrated in FIG. 1, as a means for interposing a rough sheet (4) on the rubber particle spreading surface side of the raw rubber sheet supplied between the heating roll and the heat-resistant endless bell, The face sheet supply roll (4A), the rough surface sheet take-up roll (4B), and the touch roll (82) disposed in contact with the heat-resistant endless belt (5) are provided.
[0019]
The method shown in FIG. 1 is performed as follows. First, the raw rubber sheets (1a) and (1b) drawn from the raw rubber sheet rolls (1A) and (1B) for the surface layer and the base layer are integrated by the guide roll (81). Then, rubber particles (2) are dispersed from the hopper (8) on the surface of the integrated raw rubber sheet (1). This spraying is performed by a suitable means so that a certain amount of rubber particles (2) is sprayed in the width direction of the raw rubber sheet (1). The particle size of the rubber particles is usually a size corresponding to 5 to 70% of the thickness of the raw rubber sheet before the heat and pressure treatment.
[0020]
Next, the raw rubber sheet (1) on which the rubber particles (2) are dispersed is continuously supplied between the heating roll (7) and the heat-resistant endless belt (5) of the heat and pressure treatment apparatus, and the raw rubber sheet (1). A rough sheet (4) is interposed on the rubber particle spreading surface side. The heat treatment temperature (vulcanization temperature) is appropriately selected depending on the type and amount of the vulcanizing agent used and the heat treatment time. For example, when 0.1 to 5% by weight of sulfur is used as a vulcanizing agent with respect to the raw rubber sheet, a temperature of 150 to 180 ° C. is recommended. The patterned rubber sheet (3) obtained by the heat and pressure treatment is wound into a roll as a product roll (3A) after the rough surface sheet (4) is peeled off.
[0021]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention still in detail, this invention is not limited to a following example, unless the summary is exceeded.
[0022]
Example 1
According to the method shown in FIG. 1, a patterned rubber sheet was manufactured using the raw materials described in Tables 1 to 3 below. At this time, a paper sheet treated with a release agent having a surface roughness Ra of 25 μm and a thickness of 195 μm was used as the rough sheet.
[0023]
[Table 1]
[Table 2]
[Table 3]
[Table 4]
The rubber particles (2) are sprayed on the surface of the raw rubber sheet (1) in which the raw rubber sheets (1a) and (1b) are integrated, and between the heating roll (7) and the heat-resistant endless belt (5). At the same time, pressure heating treatment was performed with the rough sheet (4) interposed on the rubber particle spreading surface side of the raw rubber sheet (1). The obtained patterned rubber sheet (3) was wound into a roll as a product roll (3A). At this time, the integrated raw rubber sheet (1) had a thickness of 12.4 mm and was deformed to 10.3 mm by heat compression. The application amount of the rubber particles (2) was 70 g / m 2, and the surface temperature of the heating roll (7) was 175 ° C. The patterned rubber sheet (3) obtained had a thickness of 12.4 mm.
[0028]
With respect to the patterned rubber sheet (3), the presence or absence of craters by voids around the rubber particles embedded in the rubber sheet and air entrainment was examined by visual observation of the surface. The investigation was performed on the surface of 150 × 150 mm by measuring the total number of embedded rubber particles, the number of rubber particles having voids formed around them, and the number of craters. As a result, the total number of embedded rubber particles was 280, the number of rubber particles having voids formed around them was 0, and the number of craters was 0.
[0029]
【The invention's effect】
According to the present invention described above, when the colored vulcanized rubber particles are embedded in the raw rubber sheet, it is improved so that the air entrained together with the colored vulcanized rubber particles can be removed. A method for producing a patterned rubber sheet is provided, and the industrial value of the present invention is great.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an example of a preferred embodiment of the present invention.
1A: Raw
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001048683A JP4513216B2 (en) | 2001-02-23 | 2001-02-23 | Method for producing patterned rubber sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001048683A JP4513216B2 (en) | 2001-02-23 | 2001-02-23 | Method for producing patterned rubber sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002248632A JP2002248632A (en) | 2002-09-03 |
| JP4513216B2 true JP4513216B2 (en) | 2010-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2001048683A Expired - Fee Related JP4513216B2 (en) | 2001-02-23 | 2001-02-23 | Method for producing patterned rubber sheet |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002248643A (en) * | 2001-02-23 | 2002-09-03 | Nitto Kako Kk | Method for manufacturing pattern-containing rubber sheet |
| JP6092807B2 (en) * | 2014-04-22 | 2017-03-08 | 多摩防水技研株式会社 | Attaching the waterproof sheet for waterproof construction |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62198435A (en) * | 1986-02-26 | 1987-09-02 | Bando Chem Ind Ltd | Manufacture of patterned sheet |
| JPH0379305A (en) * | 1989-08-21 | 1991-04-04 | Sekisui Chem Co Ltd | Manufacture of hydraulic inorganic molding |
| JPH04211438A (en) * | 1990-03-13 | 1992-08-03 | Tigers Polymer Corp | Production of vulcanized rubber sheet for laminate |
| JPH06190916A (en) * | 1992-12-25 | 1994-07-12 | Achilles Corp | Manufacture of very thin embossed rubber sheet |
| JPH0853036A (en) * | 1994-08-12 | 1996-02-27 | Suzuki Motor Corp | Asphalt sheet |
| JPH0860559A (en) * | 1994-07-23 | 1996-03-05 | Carl Freudenberg:Fa | Floor coating material with multi-colored effect consisting of rubber |
| JPH08199775A (en) * | 1995-01-20 | 1996-08-06 | Hayakawa Rubber Co Ltd | Rubber tile, production method thereof, and application method thereof |
| JPH10219570A (en) * | 1996-11-29 | 1998-08-18 | Carl Freudenberg:Fa | Floor covering and its production |
| JP2000006176A (en) * | 1998-06-26 | 2000-01-11 | Achilles Corp | Manufacture of laminated sheet |
| JP2002248643A (en) * | 2001-02-23 | 2002-09-03 | Nitto Kako Kk | Method for manufacturing pattern-containing rubber sheet |
-
2001
- 2001-02-23 JP JP2001048683A patent/JP4513216B2/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62198435A (en) * | 1986-02-26 | 1987-09-02 | Bando Chem Ind Ltd | Manufacture of patterned sheet |
| JPH0379305A (en) * | 1989-08-21 | 1991-04-04 | Sekisui Chem Co Ltd | Manufacture of hydraulic inorganic molding |
| JPH04211438A (en) * | 1990-03-13 | 1992-08-03 | Tigers Polymer Corp | Production of vulcanized rubber sheet for laminate |
| JPH06190916A (en) * | 1992-12-25 | 1994-07-12 | Achilles Corp | Manufacture of very thin embossed rubber sheet |
| JPH0860559A (en) * | 1994-07-23 | 1996-03-05 | Carl Freudenberg:Fa | Floor coating material with multi-colored effect consisting of rubber |
| JPH0853036A (en) * | 1994-08-12 | 1996-02-27 | Suzuki Motor Corp | Asphalt sheet |
| JPH08199775A (en) * | 1995-01-20 | 1996-08-06 | Hayakawa Rubber Co Ltd | Rubber tile, production method thereof, and application method thereof |
| JPH10219570A (en) * | 1996-11-29 | 1998-08-18 | Carl Freudenberg:Fa | Floor covering and its production |
| JP2000006176A (en) * | 1998-06-26 | 2000-01-11 | Achilles Corp | Manufacture of laminated sheet |
| JP2002248643A (en) * | 2001-02-23 | 2002-09-03 | Nitto Kako Kk | Method for manufacturing pattern-containing rubber sheet |
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| JP2002248632A (en) | 2002-09-03 |
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