Video Exclusives


Historical footage from Marangoni

Sentury

The Italian supplier looks back on its beginnings as a developer of tire production and retreading machinery.

Click here to watch the video


A factory tour

Sentury

Visit Continental's factory in Otrokovice where more than 21 million passenger and light freight tires are produced a year

Click here to watch the video

What do you think about Michelin's Vision tire concept? Video here.

Web Exclusive Articles

« back to listing

Processing promoters as problem solvers for silica compounds

Lanxess demonstrated in a recent study how mixing and processing times, energy consumption, surface quality, dimensional stability and mold fouling can be optimized through the use of its processing promoters

 

Rubber chemistry expertise remains a key mainstay of the Lanxess Rhein Chemie Additives business unit. This is demonstrated through its comprehensive portfolio of processing promoters for silica tire compounds. The available processing promoters can be divided up into neutral, basic and acidic mixtures.

Vulcanization times in the mixing process can be adjusted according to the choice of pH value. The neutral processing promoters, Rhenofit STA/S, a dry liquid, and GE 2340 hardly influence the vulcanization time. Lanxess’s acidic grade Aflux 37, supplied as pastilles, delays vulcanization, whereas the basic grade GE 2434 reduces cure time.

Processing promoters’ purpose is to reduce the compound’s viscosity and to distribute fillers as homogeneously as possible in the rubber compound. Mixing and processing times, energy consumption, surface quality, dimensional stability and mold fouling can be optimized through the use of Lanxess’s processing promoters. Aflux 37 and GE 2340 exhibit an output of 200% or more in extrusion.

To simulate injection molding rheovulcameter measurements were performed. On the left side of the picture you can see the resulting injection-molded pieces. In the table on the right the volumes of the injection-molded pieces are listed according to their values. The reference is set to 100%. Aflux 37, GE 2340 and Rhenofit STA/S have volumes of more than 200%.

Other than the significant reduction in viscosity, most physical properties of the vulcanizates are not affected through the use of Aflux 37, GE 2340 and Rhenofit STA/S.

Nevertheless, these additives can also help shape the tire’s performance. For example, their use reduces energy losses measured according to the Payne effect, and leads to a reduction of tan δ at 60°C, which results in lower rolling resistance.

March 22, 2016

 

Read Latest Issue

Read Latest Issue

Read Latest Issue

Web Exclusives

Winter warmer
In response to strong demand from its tire industry customers, Artic Falls plans to undertake an expansion of its indoor hall
Read Now

Q&A with Jeff Barna, Yokohama
The newly appointed COO discusses key trends and challenges – including his plans for the company, raw material prices, and expansion plans in the USA
Read Now

Conti celebrates 50th anniversary of the Contidrom
The German tire giant looks back on 50 years of history at its flagship test facility
Read Now

Interview: Giuliano Menassi, head of R&D, Pirelli
The R&D expert discusses how the latest technology trends are affecting the way in which R&D is conducted at Pirelli
Read Now

In it to win it
Dunlop, which is now in its second year of competition with Aston Martin in WEC, says a new regulation will enable greater transfer from track to road
Read Now


Supplier Spotlight

Supplier SpotlightWe are building a list of leading suppliers covering all aspects of the tire industry. Want to see your company included? Contact olivia.campbell@ukimediaevents.com for more details.

فروشگاه اینترنتی فروشگاه اینترنتی سیستم همکاری در فروش کانال تلگرام چت روم دانلود فیلم فروشگظ;ه اینترنتی

Submit your industry opinion

Industry BlogDo you have an opinion you'd like to share with the tire technology community? We'd like to hear your views and opinions on the leading issues shaping the industry. Share your comments by sending up to 500 words to rachel.evans@ukimediaevents.com

Submit Your Recruitment Ad

Recruitment AdTo send us your recruitment advertising or to receive information on placing a banner please email olivia.campbell@ukimediaevents.com