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In Recycling

September 2010

RRTG Executive Committee Meeting

Letter from the Chair ­ Marvin Myhre

This fall the he year is already half over and the Rubber Divilazy hazy days of summer are upon us. sion Meeting & Industry Requirements The days are getting shorter as well. Expo will be in This year has been a time of change. Milwaukee WI. Education The recycling industry seems to be We will have a Awareness shrinking companies and personnel are half day techbeing less involved in the RRTG and nical session Technical Developments that in my opinion is not in the best inon WednesR&D and Technical terests of recycling. It makes it more day morning. Marvin Myhre Progress difficult to get persons involved with the The following Environment Improve- Executive. We are down to very few will be the topics: ments remaining to help organize symposia, Publications and educational workshops and persons to Working with Recycled Rubber Technical Marvin Myhre, CRTDL help smaller companies providing infor-



Information Presented mation to them. at Rubber Division Our `Mission' has been and is to eduMeetings cate and provide awareness to the industry and to inform members. Our Industry Support hope is to help those involved with reMember Support cycling make improvements with their Supplier Support and process and products. HELP US TO DO Coordination THAT AGAIN!! It benefits us all. Quality Standards In order to be a viable organization we need first of all members, corporate & individual, and supplier's support. The membership fee is not an impediment to belonging (being only $45 US) and it helps us help you so consider joining for the first time or renewing. DO IT NOW.

Anomalies of Using Surface Activated Recycled Rubber GranulesJim Coughlin, Technical Sales ECOViridis Rubber Curious About Recycled Rubber in Plastics - Evan Piland, Midwest Elastomers Continuous Rubber Compounding and Rubber Recycling Using a CoRotating Twin Screw Extruder Emanuele Finazzi Properties of Rubber Compound Devulcanized Using HSM Technology - Wayne Maddever, Watson Brown HSM (Canada) Ltd.

The One and Only!


2010 RRTG Executive Committee

Marvin Myhre Chair & Technical Chair Canadian Rubber Testing & Dev. 905-687 1433 [email protected] Evan Piland Past Chair Midwest Elastomers 419-738-8844 [email protected] Sam Kauffman Vice & Membership Chair Edge Rubber, Inc. 717-262-4910 [email protected] Beth Berkheimer, CMP Administrator Rubber Division, ACS 330-972-7424 [email protected]

n Friday June 4, 2010 Edge Rubber completed their year-long quest to achieve registration of their Environmental Management System to the ISO 14001 standard. Edge Rubber now stands as the only crumb rubber manufacturer that has both a Quality Management System that is registered to the ISO 9001 standard and an Environmental Management System that is registered to the ISO 14001 standard. For more information, visit the International Organization for Standardization website management_standards/iso_9000_iso_14000.htm

Want to get involved? Join RRTG and become a committee member. We are looking for input from YOU!

Edge Rubber, Inc

Feature Your Company

The RRTG is offering members the opportunity to promote their companies in Innovations in Recycling. Tell our readers about your company's products or services. Each company will receive an article for $200. Please contact Beth at 330-972-7424 for more information.


We want to hear from you about your recycling experience. Please send your contributed articles with photos and/or announcements to Beth Berkheimer via email ([email protected]) or mail to Rubber Division, ACS (RRTG), PO Box 499, Akron, OH 44309-0499.

A Few Thoughts on Benefits of Using Recycled Rubber

Can Recycling Work for You?

The answer to that question is yes certainly for certain materials. The biggest difficulty one has is the use of rubber recycled material is the compositional differences such as the level of filler, type of filler, and polymers, etc. The property values of the crumb and virgin phase (if that is what is used) are always different. That almost invariably changes the values of the virgin phase. It also means adjustments are required. In this study four systems were used to regenerate the crumb rubber and a level of 15% was used with the virgin compound (15:85). The virgin compound was of the same composition as that of the regenerated crumb but of a different cure system for the conventional cure. For the sulfur donor system the cure package was the same for both. What this study shows is that comparable property values can be achieved if one can put their own regenerated scrap back into a Company's own products. It is, the author believes, a viable alternative in reducing costs of compounds yet maintaining property values. Table I shows the base formulations used for both the virgin compound and crumb. Table II shows the effects seen for the conventionally cured compound. Compound #1 is the compound used to produce the regenerated crumb rubber. Column #2 is the virgin rubber compound. Columns 3 & 4 are based regenerated crumb rubber using two systems. One can see that in the presence of 15% regenerated crumb the property values differed little from that of the virgin compound. No adjustments were made. The results shown in Table III are for the same compound but sulfur donor cured material. One can see that the retention is good for this compound even though the cure package is a sulfur donor (no free sulfur). It did not appear to make much of a difference what cure package was used the property retention as well as the rheological properties were well maintained.

Table I Formulations Used for This Study

Conventional Natural rubber Carbon Black Zinc Oxide Stearic Acid Diphenylguanidine Tetramethylthiuram disulfide Sulfur 100.0 50.0 5.0 2.0 0.8 -----2.5 Sulfur Donor 100.0 50.0 5.0 2.0 -----2.5 -----Continued on Page 6

Rubber Division 2010 Calendar of Events

For the most up-to-date information visit

Save the Date. . .

October 12, 13 & 14, 2010

Rubber Expo & 178th Technical Meeting Frontier Airlines Center Milwaukee, WI

November 17, 18 & 19, 2010

IRC 2010 Conference & Exhibition Renaissance Mumbai Hotel & Convention Mumbai, India Begins at 8AM

October 14 & 15, 2010

The Future of Natural Rubber Agropolis International Montpellier CEDEX 5, France Begins at 8AM

December 2, 2010

Cleveland, Ohio October 11-13, 2011

Fort Wayne Rubber Group Christmas Party Ceruitis, 6601 Innovation Blvd. Ft. Wayne, IN Begins at 2:30PM

November 3, 2010

Focus on Ferris Ferris State University National Elastomers Center Big Rapids Begins at 3:30PM

December 3, 2010

NERPG Christmas Party Contact: Cheryl Woodman 508-867-7731 Begins at 9:30AM

April 25, 26 & 27, 2010

Rubber Division's 179th Technical Meeting Hilton Akron/Fairlawn Akron, OH

November 4, 2010

New England Rubber & Plastics Group (NERPG) Fall Technical Meeting Old Sturbridge Village Sturbridge, MA More Info: Cheryl Woodman 508-867-7731 Begins at 9:30AM

Contact Beth at [email protected]

Rubber Expo 2010 October 12-14, 2010 Milwaukee, WI Rubber Recycling Round Table Discussion Wednesday, October 13, 2010 3:45 PM Milwaukee, WI

or 330-972-7424 To reserve your booth space on the 2011 Rubber Expo Floor Plan

See you there!

Rubber ExpoTM and 177th Technical Meeting

There is still time to exhibit at the Rubber Expo 2010

October 12-14, 2010 Midwest Airlines Center Milwaukee, Wisconsin

To become an Exhibitor, contact Beth Berkheimer, Expo & Meetings Manager at [email protected] or 330-972-7424. Why Become an Exhibitor? Showcase your company at the Rubber Expo, the only show devoted exclusively to rubber and rubber-related products. Featuring industry-leading companies from around the world, the Expo is the perfect opportunity to increase your competitive edge, network with key decision makers, and support your sales efforts. For just $1800, you can give your company the opportunity to: Support sales efforts with direct, personal, on-the-floor contact Introduce new products, programs and product lines Reinforce your corporate image with current and potential buyers Obtain a multitude of qualified contacts in just days Meet your competition on an even playing field (every booth is 10x10) Network with industry decision makers at one venue Gain exclusive access to pre-registration and post-show mailing lists Create a lasting impression by purchasing an exclusive Rubber Expo sponsorship Reach an international audience without the expense of leaving the country

Only 1 Recycling Pavilion Booth Remains!! Make it Yours! 330-972-7424

Included in your Exhibitor Package: The rental of the 10'x10' booth space A single electrical hookup (up to 500 watts) Carpeting and a 6' draped table (in show colors) A single wastebasket and two chairs

Rubber Expo 2009, Rubber Recycling

This fall's Technical Meeting includes Rubber Recycling Technical Symposia topics as well as the Student Colloquium featuring oral presentations on Rubber Recycling.

Interested in advertising in Innovations in Recycling? Do you know of an upcoming event in rubber recycling that can be added to the calendar? Please contact Beth Berkheimer at [email protected] or 330-972-7424, and we will add it to the next addition of Innovations in Recycling.

Can Recycling Work for You?

Continued from Page 3

Table II The Effect of Treated Crumb Rubber on a Conventionally Cured NR

1 2 3 4

Rheometer Data @ 150


Maximum torque, dn.m Minimum torque, dn.m Time to 2pt rise, minutes Time to 90% cure, minutes Vulcanizate Properties Cured @ 150 OC Cure time, minutes Hardness, Shore A 100% modulus, MPa 200% modulus, MPa 300% modulus, MPa Tensile strength, MPa Elongation @ break, % Tear Str., D C, kN/m

71.63 11.75 2.1 30.8 35.8 59 2.1 5.62 11.17 22.58 510 99

84.74 5.08 4.6 11.3 16.3 64 2.69 7.44 14.51 25.86 420 73.7

85.76 7.23 4.1 11.0 16.4 62 2.55 6.62 12.41 24.68 515 115.8

88.13 7.91 3.8 10.6 15.6 64 2.69 7.17 13.13 24.17 485 101.2

Table III The Effect of treated Crumb Rubber on an EV Cured NR

1 Rheometer Data @ 150


2 54.2 12.0 12.0 12.0 17.0 55 1.4 3.7 7.5 22.1 580 77.3

3 73.3 6.4 1.6 6.4 11.4 60 2.0 5.7 11.1 21.6 465 75.7

Maximum torque, dN.m Minimum torque, dN.m Time to 2pt rise, min Time to 90% cure, min Vulcanizate Properties Cured @ 150 OC Cure time, minutes Hardness, Shore A 100% modulus, MPa 200% modulus, MPa 300% modulus, MPa Tensile strength, MPa Elongation @ break, % Tear Str., Die C, kN/m

67.7 10.7 2.0 10.3 15.3 57 1.7 4.9 9.9 23.5 550 114.4

2010 RRTG Membership & Sponsorship Opportunities

2010 Rubber Recycling Topical Group Membership

2010 RRTG Membership $45 2010 RRTG Student Membership $15

Sponsorship Opportunities Includes 2010 Membership

Membership + Newsletters Ad $150

Includes one 2010 RRTG membership, a business card ad in all 2010 INNOVATIONS newsletters

Membership + Newsletters Ad + Website Ad $250

Includes one 2010 RRTG membership, a business card ad in all 2010 INNOVATIONS newsletters and your company's name listed on the Rubber Division's Rubber Recycling website with a direct link to your website

Visit the Rubber Recycling Topical Group website to purchase sponsorships and memberships for 2010

Membership Benefits and Features

Networking opportunities

Rubber Recycling Topical Group Newsletters: provides up-to-date notice of technical, organizational and industry trends and notices Access to the Rubber Division Library Services (see page 6): purchase papers, bibliographies and searches at a discount RRTG Education Seminars at Rubber Division, ACS rates

Thank You to Our Sponsors


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