JPH08244030A - Rubber material and kneading method - Google Patents
Rubber material and kneading methodInfo
- Publication number
- JPH08244030A JPH08244030A JP5152195A JP5152195A JPH08244030A JP H08244030 A JPH08244030 A JP H08244030A JP 5152195 A JP5152195 A JP 5152195A JP 5152195 A JP5152195 A JP 5152195A JP H08244030 A JPH08244030 A JP H08244030A
- Authority
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- Japan
- Prior art keywords
- raw material
- rubber raw
- kneading
- rubber
- mixer
- 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.)
- Pending
Links
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はタイヤ等を製造する際に
用いられるゴム原料及びそれを用いた混練方法に関し、
更に詳しくは、添加剤を取り込む時間を早めて、混練サ
イクルを短縮化すると共に混練後のゴム品質を改善する
ようにしたゴム原料及びそれを用いた混練方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber raw material used in the production of tires and the like and a kneading method using the same.
More specifically, the present invention relates to a rubber raw material and a kneading method using the same, in which the time for incorporating an additive is shortened to shorten the kneading cycle and improve the rubber quality after kneading.
【０００２】[0002]
【従来の技術】従来、例えば、タイヤの製造工程におい
て、タイヤ構成部材を構成する未加硫のゴム材料を得る
場合、ゴム原料をミキサーに投入し、それにカーボンブ
ラック等の添加剤を加えて混練りするようにしている。
その際、図３に示すように、ミキサーに投入されるゴム
原料Ｒは、ブロック状の形になっている。例えば、重量
が約３５kgで、その各長さが、それぞれ４００mm、６０
０mm、１５０mmの塊状で供給される。2. Description of the Related Art Conventionally, for example, when an unvulcanized rubber material constituting a tire constituent member is obtained in a tire manufacturing process, a rubber raw material is put into a mixer and an additive such as carbon black is added thereto and mixed. I try to knead.
At that time, as shown in FIG. 3, the rubber raw material R charged into the mixer has a block shape. For example, it weighs about 35 kg and its length is 400 mm and 60 mm, respectively.
Supplied in blocks of 0 mm and 150 mm.
【０００３】上記ゴム原料Ｒは、ゴムとカーボンが反応
として起こる、所謂カーボン焼けでゴムがゲル化するの
を防ぐため、混練りと共に熱を付与して上昇する温度が
ある所定の温度に達するまでにカーボンがゴム中に取り
込まれる必要がある。しかし、上述したブロック状のゴ
ム原料Ｒは、ミキサーへの投入時に、ローターに対する
ゴム原料の喰い込みが悪く、更に添加剤の取込みが遅い
ため、カーボン焼けが生じるまでにミキサーに投入した
カーボンを完全に取り込むことが、小粒径のカーボンを
多量に配合するゴム原料においては、困難になる場合が
ある。タイヤの性能向上に伴い、近年、その様なゴム原
料が多くなる傾向にあり、その対策が求められていた。In order to prevent the rubber from gelling due to so-called carbon burning, which occurs as a reaction between rubber and carbon, the rubber raw material R is heated by kneading until the temperature rises to a predetermined temperature. It is necessary for carbon to be incorporated into rubber. However, the block-shaped rubber raw material R described above has a poor feeding of the rubber raw material into the rotor at the time of being charged into the mixer, and since the incorporation of the additive is slow, the carbon charged into the mixer is completely removed before carbon burning occurs. It may be difficult to incorporate into the rubber raw material in which a large amount of carbon having a small particle size is blended. As the performance of tires has been improved, the amount of such rubber raw materials has been increasing in recent years, and countermeasures have been required.
【０００４】また、添加剤の取込み時間がより長くかか
ると、一部の添加剤が取込まれないまま放出されたり、
また、混練中にミキサーの混練室外に添加剤がより多く
飛散したりすることにより、粘度等混練後のゴム物性に
バラツキが発生し易くなり、その品質が不均一になり易
いため、添加剤の取込み時間の短縮が強く望まれてい
た。Further, if the time taken for the additives to be taken is longer, some of the additives may be released without being taken in,
Further, during the kneading, if the additive is more scattered outside the kneading chamber of the mixer, variations in the rubber physical properties after kneading such as viscosity are likely to occur, and the quality of the additive tends to be non-uniform. There was a strong demand for shortening the uptake time.
【０００５】そこで、上記解決策として、ミキサーへの
投入時にブロック状のゴム原料を破砕したり、薄片状に
切断する装置の提案がある。このようにゴム原料を破砕
したり、薄片状に切断することで、ローターへの喰い込
みや、ゴム原料が添加剤と接触する面積を高めて添加剤
の取込みを早くするようにしている。しかし、これらの
装置を設置するには、設備コストが高く、また、細分化
されたゴム片相互に密着が発生するため、せっかく広く
した接触面積が減少してしまう。また、別の解決策とし
て、ブロック状のゴム原料を初めからペレット状に形成
することにより、添加剤との接触面積を確保する提案が
ある。しかし、ペレット状のゴム原料は嵩張るため、輸
送コストの上昇を招き、更に、ストックするためにも、
広いスペースが必要になるという問題があった。Therefore, as a solution to the above, there has been proposed a device for crushing a block-shaped rubber raw material or cutting it into a thin piece at the time of charging it into a mixer. By crushing the rubber raw material or cutting it into flakes in this manner, the incorporation of the additive into the rotor and the area of contact of the rubber raw material with the additive are increased to speed up the incorporation of the additive. However, in order to install these devices, the equipment cost is high, and since the finely divided rubber pieces come into close contact with each other, the widened contact area is reduced. Further, as another solution, there is a proposal to secure a contact area with an additive by forming a block-shaped rubber raw material into pellets from the beginning. However, since the pelletized rubber raw material is bulky, it causes an increase in transportation cost, and also for stocking,
There was a problem that a large space was needed.
【０００６】[0006]
【発明が解決しようとする課題】本発明の目的は、設備
コストや広いストック用のスペースを要せず、また、輸
送コストの上昇も招くことなく、添加剤を完全に取り込
む時間を早めて、混練サイクルの短縮化を行い、生産性
を高めることができると共に、混練後のゴム物性を均一
化することが可能なゴム原料及びそれを用いた混練方法
を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to shorten the time for completely incorporating an additive without requiring facility cost, a large space for stock, and without increasing transportation cost. It is an object of the present invention to provide a rubber raw material capable of shortening the kneading cycle, improving productivity, and homogenizing the rubber physical properties after kneading, and a kneading method using the same.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成する本発
明のゴム原料は、ミキサーにより添加剤と共に混練りさ
れるゴム原料であって、一定重量当たりにおける表面積
と体積との比で表される比表面積が１．３cm-1以上で、
かつ帯板状に形成されたことを特徴とする。また、本発
明の混練方法は、ゴム原料に添加剤を加えてミキサーに
より混練りする際に、一定重量当たりにおける表面積と
体積との比で表される比表面積が１．３cm-1以上で、か
つ帯板状に形成されたゴム原料をミキサーに供給して混
練りすることを特徴とする。The rubber raw material of the present invention which achieves the above object is a rubber raw material which is kneaded together with an additive by a mixer, and has a ratio represented by the ratio of surface area to volume per constant weight. With a surface area of 1.3 cm -1 or more,
It is also characterized in that it is formed into a strip plate shape. Further, the kneading method of the present invention, when the additive is added to the rubber raw material and kneading with a mixer, the specific surface area represented by the ratio of the surface area to the volume per constant weight is 1.3 cm −1 or more, In addition, the rubber raw material formed into a strip shape is supplied to a mixer and kneaded.
【０００８】[0008]
【作用】本発明は上記のように構成され、添加剤を付加
して混練りされるゴム原料を比表面積１．３cm-1以上で
帯板状にするので、ミキサーのローターに対する喰い込
みを、従来のブロック状にしたゴム原料よりも著しく良
好にすることができ、かつ、添加剤が付着する広い接触
面積を確保することができる。そのため、混練時に添加
剤の取込みを迅速に行うことが可能となり、それによっ
て、カーボン焼け等の問題が起こる前に、カーボン等の
添加剤を完全に取り込むことができるため、混練サイク
ルの短縮化を図ることができ、その結果、生産性の改善
を図ることができると共に、添加剤の取込みをより確実
に行うことにより、混練後の粘度のバラツキが小さくな
って、品質を均一化することができる。According to the present invention, the rubber material to be kneaded by adding the additive is formed into a strip plate having a specific surface area of 1.3 cm -1 or more. The rubber raw material can be made significantly better than the block-shaped rubber raw material, and a wide contact area to which the additive is attached can be secured. Therefore, it becomes possible to take up the additive quickly during kneading, and by doing so, the additive such as carbon can be completely taken in before a problem such as carbon burning occurs, thus shortening the kneading cycle. As a result, it is possible to improve the productivity and more reliably incorporate the additive, so that the variation in the viscosity after kneading can be reduced and the quality can be made uniform. .
【０００９】また、ゴム原料の形状を帯板状とするた
め、輸送やストックする場合には、ロール状に巻き取る
ことや、或いは幾重にも順次折り重ねた折り重ね状にす
ることができるので、嵩張ることを回避して、輸送コス
トの上昇を招くことがないと共に、ストックするための
広いスペースを不要にすることができる。しかも、ミキ
サーへの投入時に、ゴム原料を破砕したり、薄片状に切
断する必要もないので、破砕や切断用の装置を設置する
必要がなく、設備コストを要することがない。Further, since the rubber raw material is in the form of a strip plate, it can be wound into a roll or transported in a stock form so that it can be folded in multiple layers. Therefore, it is possible to avoid the bulkiness, increase the transportation cost, and eliminate the need for a large space for stocking. In addition, since it is not necessary to crush the rubber raw material or cut it into flakes when it is charged into the mixer, it is not necessary to install a crushing or cutting device, and no facility cost is required.
【００１０】[0010]
【実施例】以下、添付図面に基づいて本発明の実施例を
説明する。図１は本発明のゴム原料の一例を示す。この
ゴム原料１は、ミキサーによりカーボンブラックやホワ
イトカーボン等の粉体からなる添加剤と共に混練りされ
るゴム原料であって、帯板状に形成されている。また、
ゴム原料１は、一定重量当たりにおける表面積と体積と
の比で表される比表面積が１．３cm-1以上になってい
る。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an example of the rubber raw material of the present invention. The rubber raw material 1 is a rubber raw material that is kneaded with an additive made of powder such as carbon black or white carbon by a mixer, and is formed into a strip plate shape. Also,
The rubber raw material 1 has a specific surface area of 1.3 cm -1 or more, which is represented by the ratio of the surface area to the volume per constant weight.
【００１１】上記ゴム原料１は、ミキサーに投入され、
ミキサーのローターの回転により混練りが行われる。ゴ
ム原料供給後、ミキサーには、カーボン等の添加剤や、
オイル等の添加剤が従来同様に順次付加されて混練りさ
れる。添加剤と混練りされるゴム原料１が、比表面積
１．３cm-1以上にした帯状の板状体に構成するため、従
来のブロック状のものよりもミキサーのローターへの喰
い込みを大幅に容易にすることができ、また、添加剤と
接触する広い接触面積を充分に確保することができるの
で、混練時に添加剤の取込みを早くして、カーボン等の
添加剤をカーボン焼け等の問題が生じるまでに完全に取
り込むことができ、また、それよって、混練サイクルの
短縮化を図ることが可能となる。従って、生産性を高め
ることができ、更に、添加剤の取込みをより確実にする
ことにより、混練後の粘度のバラツキを小さくすること
ができるので、品質の均一化を図ることができる。The rubber raw material 1 is charged into a mixer,
Kneading is performed by rotating the rotor of the mixer. After supplying the rubber raw material, the mixer has additives such as carbon,
Additives such as oil are sequentially added and kneaded as in the conventional case. Since the rubber material 1 to be kneaded with the additive is formed into a strip-shaped plate having a specific surface area of 1.3 cm -1 or more, it is much easier to bite into the rotor of the mixer than the conventional block-shaped one. In addition, since it is possible to sufficiently secure a wide contact area for contact with the additive, the incorporation of the additive can be accelerated during kneading, and problems such as carbon burning of the additive such as carbon occur. By this, it is possible to take in completely and to shorten the kneading cycle. Therefore, the productivity can be enhanced, and further, by ensuring the incorporation of the additive, the variation in the viscosity after kneading can be reduced, and the quality can be made uniform.
【００１２】また、ゴム原料１が帯板状に形成されてい
るため、それを輸送やストックする際には、ロール状に
巻き取ったり、或いは幾重にも順次折り重ねた折り重ね
状にすることが可能であるため、ゴム原料が嵩張ること
がなく、よって、輸送コストが上昇したり、ストックす
るために広いスペースが必要になることがない。その
上、ミキサーへの投入時に、ゴム原料を破砕したり、薄
片状に切断する必要がないため、破砕や切断用の装置の
設置が不要で、設備コストを何らかけることがない。Further, since the rubber raw material 1 is formed in the shape of a strip plate, when it is transported or stocked, it should be wound into a roll or folded into multiple layers. Since the rubber raw material is not bulky, the transportation cost does not increase and a wide space is not required for stocking. In addition, since it is not necessary to crush the rubber raw material or cut it into flakes when it is charged into the mixer, there is no need to install a device for crushing or cutting, and there is no equipment cost.
【００１３】上記ゴム原料１の比表面積の上限として
は、巻き取ったり、折り重ね状にストック可能であれ
ば、特に限定されるものではないが、好ましくは、１０
cm-1にすることができる。比表面積が１０cm-1を越える
と、ゴム原料が薄くなりすぎて、相互の密着を防止する
のに、多量の密着防止剤等の不純物が付着して、品質の
低下を招く危険がある。The upper limit of the specific surface area of the rubber raw material 1 is not particularly limited as long as it can be wound or stocked in a folded state, but is preferably 10
Can be cm -1 . If the specific surface area exceeds 10 cm -1 , the rubber raw material becomes too thin, and in order to prevent mutual adhesion, a large amount of impurities such as anti-adhesion agent adhere to it, which may lead to deterioration in quality.
【００１４】また、ゴム原料１のムーニー粘度として
は、７０以下にするのがよい。ムーニー粘度が７０を越
えると、帯板状ゴム原料の剛性が高くなり、計量時の作
業性が悪くなる。本発明では、上述したゴム原料１は、
タイヤの製造工程において、タイヤ構成部材を構成する
未加硫のゴム材料を得るのに、特に好ましく使用するこ
とができる。The Mooney viscosity of the rubber raw material 1 is preferably 70 or less. If the Mooney viscosity exceeds 70, the rigidity of the strip-shaped rubber raw material becomes high and the workability at the time of weighing becomes poor. In the present invention, the rubber raw material 1 described above is
In the tire manufacturing process, it can be particularly preferably used for obtaining an unvulcanized rubber material constituting a tire constituent member.
【００１５】以下に、本発明を更に具体的に説明する。
ゴム原料の重量を３５kg、ゴム原料と添加剤の配合内容
を表１で共通にし、図１に示すように帯板状に形成した
本発明ゴム原料と、図３に示すブロック状の従来ゴム原
料とをそれぞれ得た。本発明ゴム原料は、各長さが６０
０mm×６０００mm×１０mm、比表面積２．０２cm-1であ
り、従来ゴム原料は、各長さが４００mm×６００mm×１
５０mm、比表面積０．２１cm-1である。また、ムーニー
粘度は、共に３８である。The present invention will be described in more detail below.
The rubber raw material weighs 35 kg, the rubber raw material and the additive content are the same in Table 1, and the rubber raw material of the present invention formed into a strip plate shape as shown in FIG. 1 and the block-shaped conventional rubber raw material shown in FIG. And got respectively. The rubber raw material of the present invention has a length of 60
It has a length of 0 mm x 6000 mm x 10 mm and a specific surface area of 2.02 cm -1 , and each conventional rubber raw material has a length of 400 mm x 600 mm x 1
The surface area is 50 mm and the specific surface area is 0.21 cm -1 . The Mooney viscosities are both 38.
【００１６】これら各試験ゴム原料を使用し、投入電力
量を一定にし、各３バッチの混練試験を行い、カーボン
取込み時間（ＢＩＴ短縮）、混練時間（混練サイクル短
縮）、粘度バラスキを測定し、表２に示す結果を得た。
また、図２に、ミキサーにおける混練時間に対する電力
変化及び温度変化との相関関係を表すグラフ図を示す。ＢＩＴ短縮 各試験ゴム原料をミキサーに投入すると共に、添加剤を
順次投入し、カーボンがゴム中に取り込まれる時間（Ｂ
ＩＴ）を図２のグラフ図より読み取り、その結果を従来
ゴム原料を基準に±で評価した。−は短縮、＋は増加を
示す。混練サイクル短縮 試験ゴム原料のミキサーへの投入を開始してから、予め
定めた電力量に達し放出されるまでの時間を測定し、そ
の結果を従来ゴム原料を基準に±で評価した。−は短
縮、＋は増加を示す。粘度バラツキ 混練終了後のゴム原料より各バッチ１０個の試験片を採
取し、各試験片のムーニー粘度を測定し、ｎ＝３０の標
準偏差値を従来ゴム原料を１００とする指数値で評価し
た。この値が小さい程粘度のバラツキが小さいことを示
す。Using each of these test rubber raw materials, the amount of input electric power was kept constant, and a kneading test was conducted for each of three batches to measure carbon uptake time (shortening BIT), kneading time (shortening kneading cycle), and viscosity variation. The results shown in Table 2 were obtained.
Further, FIG. 2 is a graph showing the correlation between the change in electric power and the change in temperature with respect to the kneading time in the mixer. BIT shortening Time for carbon to be taken into rubber (B
(IT) was read from the graph of FIG. 2, and the result was evaluated with ± based on the conventional rubber raw material. − Indicates shortening and + indicates increasing. Kneading Cycle Shortening Test The time from the start of feeding the rubber raw material into the mixer to the time when the predetermined amount of electric power was reached and when it was discharged was measured, and the result was evaluated as ± based on the conventional rubber raw material. − Indicates shortening and + indicates increasing. Viscosity variations Ten test pieces of each batch were taken from the rubber raw material after the kneading, the Mooney viscosity of each test piece was measured, and the standard deviation value of n = 30 was evaluated by an index value with the conventional rubber raw material being 100. . The smaller this value is, the smaller the variation in viscosity is.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 表２に示すように、形状を帯板状にして、比表面積を従
来よりも大幅に大きくした本発明ゴム原料は、カーボン
（添加剤）を完全に取り込むＢＩＴ時間が大幅に短縮さ
れ、混練サイクルが短く、混練後の粘度のバラツキ（ゴ
ム物性）が大きく改善されていることが判る。[Table 2] As shown in Table 2, the rubber raw material of the present invention, which has a strip plate shape and a significantly larger specific surface area than the conventional one, has a significantly shortened BIT time for completely incorporating carbon (additive), and a kneading cycle. It is clear that the viscosity is short and the dispersion of the viscosity after kneading (rubber physical properties) is greatly improved.
【００１９】また、ゴム原料の重量、及び配合内容を上
記と同様にし、図１に示す帯板状の構成において、比表
面積を表３のように変えた試験ゴム原料１〜４をそれぞ
れ製作した。これら各試験ゴム原料を上記と同様にし
て、ＢＩＴ短縮、混練サイクル短縮、粘度バラツキの評
価試験を行ったところ、表３に示す結果を得た。Further, the weights and contents of the rubber raw materials were the same as those described above, and test rubber raw materials 1 to 4 each having a specific surface area as shown in Table 3 were manufactured in the strip plate configuration shown in FIG. . Each of these test rubber raw materials was subjected to the BIT shortening, kneading cycle shortening, and viscosity variation evaluation tests in the same manner as above, and the results shown in Table 3 were obtained.
【００２０】[0020]
【表３】 表３から明らかなように、一定重量当たりにおける表面
積と体積との比で表される比表面積を１．３cm-1以上に
すればよいことが判る。[Table 3] As is clear from Table 3, it is understood that the specific surface area represented by the ratio of surface area to volume per constant weight should be 1.3 cm -1 or more.
【００２１】[0021]
【発明の効果】上述したように本発明は、ミキサーによ
り添加剤と共に混練りされるゴム原料を、一定重量当た
りにおける表面積と体積との比で表される比表面積が
１．３cm -1以上で、かつ帯板状となるように構成したの
で、設備コストや広いストック用のスペースを要せず、
更に輸送コストの上昇も招くことなく、添加剤を完全に
取り込む時間を早めて、混練サイクルの短縮化を行い、
それによって、生産性を高めることができると共に、混
練後のゴム物性を均一化することができる。As described above, the present invention is based on the mixer.
Rubber material to be kneaded with additives
The specific surface area represented by the ratio of surface area to volume in
1.3 cm -1Above, and configured to be strip-shaped
It does not require equipment cost or space for large stock,
Additives can be completely removed without increasing transportation costs.
To shorten the kneading cycle by shortening the loading time,
This can increase productivity and reduce
The rubber physical properties after kneading can be made uniform.
【図１】本発明のゴム原料の一例を示す一部を省略した
斜視図である。FIG. 1 is a partially omitted perspective view showing an example of a rubber raw material of the present invention.
【図２】比表面積を２．０２cm-1にした本発明ゴム原料
と、比表面積を０．２１cm-1した従来ゴム原料とにおい
て、ミキサーでの混練時間（秒）に対する供給電力及び
温度との相関関係を示すグラブ図である。And the present invention the rubber material [2] was specific surface area 2.02cm -1, in the conventional rubber material the specific surface area was 0.21 cm -1, the supply power and temperature for the kneading time in the mixer (s) It is a grab diagram which shows correlation.
【図３】従来のゴム原料を示す斜視図である。FIG. 3 is a perspective view showing a conventional rubber raw material.
１ ゴム原料 1 rubber raw material
Claims (4)
るゴム原料であって、一定重量当たりにおける表面積と
体積との比で表される比表面積が１．３cm-1以上で、か
つ帯板状に形成されたゴム原料。1. A rubber raw material to be kneaded together with an additive by a mixer, having a specific surface area represented by the ratio of surface area to volume at a constant weight of 1.3 cm −1 or more, and formed into a strip plate shape. Rubber raw material.
のゴム原料。2. The rubber raw material according to claim 1, wherein the additive is powder.
り混練りする際に、一定重量当たりにおける表面積と体
積との比で表される比表面積が１．３cm-1以上で、かつ
帯板状に形成されたゴム原料をミキサーに供給して混練
りするゴム原料を用いた混練方法。3. When a rubber raw material is added with an additive and kneaded with a mixer, the specific surface area represented by the ratio of the surface area to the volume per constant weight is 1.3 cm −1 or more, and a strip plate shape. A kneading method using a rubber raw material in which the rubber raw material formed in the above is supplied to a mixer and kneaded.
のゴム原料を用いた混練方法。4. The kneading method using a rubber raw material according to claim 3, wherein the additive is powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5152195A JPH08244030A (en) | 1995-03-10 | 1995-03-10 | Rubber material and kneading method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5152195A JPH08244030A (en) | 1995-03-10 | 1995-03-10 | Rubber material and kneading method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08244030A true JPH08244030A (en) | 1996-09-24 |
Family
ID=12889325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5152195A Pending JPH08244030A (en) | 1995-03-10 | 1995-03-10 | Rubber material and kneading method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08244030A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009172964A (en) * | 2008-01-28 | 2009-08-06 | Bridgestone Corp | Method of manufacturing rubber material molding |
| JP2010274506A (en) * | 2009-05-28 | 2010-12-09 | Bridgestone Corp | Rubber material molding, aggregate of the same, and rubber product using them |
-
1995
- 1995-03-10 JP JP5152195A patent/JPH08244030A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009172964A (en) * | 2008-01-28 | 2009-08-06 | Bridgestone Corp | Method of manufacturing rubber material molding |
| JP2010274506A (en) * | 2009-05-28 | 2010-12-09 | Bridgestone Corp | Rubber material molding, aggregate of the same, and rubber product using them |
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