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Home > News > Recycling

Evonik team develops special formulation for using tire recyclate

Source:Adsale Plastics Network Date :2024-09-26 Editor :RC
Copyright: This article was originally written/edited by Adsale Plastics Network (AdsaleCPRJ.com), republishing and excerpting are not allowed without permission. For any copyright infringement, we will pursue legal liability in accordance with the law.

Evonik has developed a special formulation to maximize the use of tire recyclate in new tire production, enhancing circularity of end-of-life tires.


Evonik_Christian Mani Project Manager Circularity_480.jpg

Christian Mani (left), Project Manager Circularity, works closely with Jens Kiesewetter, Head of Tire & Rubber Application Technology, to enhance circularity of tires. (Source: Evonik)

 

Challenge to integrate tire recyclate

 

New tire rubber is normally produced by vulcanization of raw rubber, sulfur, and other components.

 

However, as ground tire rubber from end-of-life tires include vulcanized material, the properties differ from those of non-vulcanized rubber. Their chemical structure hampers interaction with new tire materials.

 

Therefore, trade associations in the tire recycling sector currently set an admixture of about 5% ground tire rubber from end-of-life-tires as the upper limit.

 

Reversing vulcanization of rubber

 

Christian Mani, Project Manager Circularity at Evonik, and his team of researchers have succeeded in reversing the vulcanization of rubber to a large extent.

 

By adding a special formulation containing vinyl silanes, the firm bonds in the recycled rubber can be split. The sulfur bridges in the rubber are cleaved, with many of the long carbon chains untouched.

 

The team has already used these vinyl silanes successfully for devulcanization. In trials, the proportion of recyclate in the rubber blend could be increased to up to 20%, up to four times as much recycled rubber in new tires as in the past.

 

The team also aims to find a solution for use in large, commercial scale, industrial production in the foreseeable future.


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 SACMI (SHANGHAI) MACHINERY EQUIPMENT CO., LTD.      
 DONGGUAN DEHUA PRECISION MOLD CO., LTD      
 JUHESHUN ADVANCED MATERIALS CO., LTD.      
 HEFEI TAIHE INTELLIGENT TECHNOLOGY GROUP CO.,LTD.      
 WINDORA MATERIALS LLC      
 GREENWICH (CHINA) TECHNOLOGY DEVELOPMENT LIMITED      
 GREENCORE RESOURCES LIMITED      
 LINKER NEW MATERIALS CO., LTD      
 SHANGHAI HAWKWAY PROCESS SOLUTIONS CO., LTD      
 GUANGXI HENGYI NEW MATERIALS CO., LTD.      
 TAIZHOU MIXIN MACHINERY CO., LTD.      
 ZHEJIANG ROTOUN PLASTIC TECHNOLOGY CORP.      
 GUANGDONG GUOHENG YOUHE ADVANCED MATERIALS CO., LTD.      
 KADIDE      
 GUANGXI WUZHOU GUOLONG RECYCLABE RESOURCES DEVELOPMENT CO., LTD.      
 SUZHOU BECHTON PLASTIC MACHINERY CO., LTD      
 YUYAO KAWAGUCHI Manufacturing Co., Ltd.      
 LINYI HUASU ELECTRONIC TECHNOLOGY CO., LTD.      
 ANHUI ZHONGXIN HONGWEI TECHNOLOGY CO.,LTD      
 FUJIAN NAN'AN STAR RUBBER&PLASTIC MACHINERY CO., LTD.      
 ZHANGJIAGANG GREENLANDPLAST MACHINERY CO.,LTD      
 FOSHAN SHUNDE MINGSANFENG MOULD CO., LTD.      

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Source:Adsale Plastics Network Date :2024-09-26 Editor :RC
Copyright: This article was originally written/edited by Adsale Plastics Network (AdsaleCPRJ.com), republishing and excerpting are not allowed without permission. For any copyright infringement, we will pursue legal liability in accordance with the law.

Evonik has developed a special formulation to maximize the use of tire recyclate in new tire production, enhancing circularity of end-of-life tires.


Evonik_Christian Mani Project Manager Circularity_480.jpg

Christian Mani (left), Project Manager Circularity, works closely with Jens Kiesewetter, Head of Tire & Rubber Application Technology, to enhance circularity of tires. (Source: Evonik)

 

Challenge to integrate tire recyclate

 

New tire rubber is normally produced by vulcanization of raw rubber, sulfur, and other components.

 

However, as ground tire rubber from end-of-life tires include vulcanized material, the properties differ from those of non-vulcanized rubber. Their chemical structure hampers interaction with new tire materials.

 

Therefore, trade associations in the tire recycling sector currently set an admixture of about 5% ground tire rubber from end-of-life-tires as the upper limit.

 

Reversing vulcanization of rubber

 

Christian Mani, Project Manager Circularity at Evonik, and his team of researchers have succeeded in reversing the vulcanization of rubber to a large extent.

 

By adding a special formulation containing vinyl silanes, the firm bonds in the recycled rubber can be split. The sulfur bridges in the rubber are cleaved, with many of the long carbon chains untouched.

 

The team has already used these vinyl silanes successfully for devulcanization. In trials, the proportion of recyclate in the rubber blend could be increased to up to 20%, up to four times as much recycled rubber in new tires as in the past.

 

The team also aims to find a solution for use in large, commercial scale, industrial production in the foreseeable future.


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Evonik team develops special formulation for using tire recyclate

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