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Changed vote makes difference in ITC decision
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WASHINGTON—The shift of one vote caused the International Trade Commission to make a final determination that the U.S. truck and bus tire manufacturing industry is not being materially...
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WASHINGTON—The shift of one vote caused the International Trade Commission to make a final determination that the U.S. truck and bus tire manufacturing industry is not being materially injured because of imports from China. WASHINGTON—The shift of one vote caused the International Trade Commission to make a final determination that the U.S. truck and bus tire manufacturing industry is not being materially injured because of imports from China. $WASHINGTON—The shift of one vote caused the International Trade Commission to make a final determination that the U.S. truck and bus tire manufacturing industry is not being materially injured because of imports from China.
Goodyear, Cooper Tire employees honored with STEP Ahead awards
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AKRON—The Manufacturing Institute will honor five women who work for Goodyear and Cooper Tire & Rubber Co. at its upcoming Women in Manufacturing STEP (Science, Technology, Engineering...
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AKRON—The Manufacturing Institute will honor five women who work for Goodyear and Cooper at its upcoming Women in Manufacturing STEP (Science, Technology, Engineering and Production) Ahead Awards. AKRON—The Manufacturing Institute will honor five women who work for Goodyear and Cooper at its upcoming Women in Manufacturing STEP (Science, Technology, Engineering and Production) Ahead Awards. $AKRON—The Manufacturing Institute will honor five women who work for Goodyear and Cooper at its upcoming Women in Manufacturing STEP (Science, Technology, Engineering and Production) Ahead Awards.
James Walker to unveil new elastomer family
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CHESHIRE, England—A sealing products manufacturer from the United Kingdom is ready to release a new family of elastomers it will use in its goods to meet the ever-increasing demands of the...
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CHESHIRE, England—A sealing products manufacturer from the United Kingdom is ready to release a new family of elastomers it will use in its goods to meet the ever-increasing demands of the oil and gas industry. CHESHIRE, England—A sealing products manufacturer from the United Kingdom is ready to release a new family of elastomers it will use in its goods to meet the ever-increasing demands of the oil and gas industry. $CHESHIRE, England—A sealing products manufacturer from the United Kingdom is ready to release a new family of elastomers it will use in its goods to meet the ever-increasing demands of the oil and gas industry.
Oil and gas market looking up, but profits hard to come by
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WASHINGTON—This year will be better than 2016 for the oil and gas industry and the rubber and polymer product manufacturers that supply them, according to industry officials and experts....
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WASHINGTON—This year will be better than 2016 for the oil and gas industry and the rubber and polymer product manufacturers that supply them, according to industry officials and experts. WASHINGTON—This year will be better than 2016 for the oil and gas industry and the rubber and polymer product manufacturers that supply them, according to industry officials and experts. $WASHINGTON—This year will be better than 2016 for the oil and gas industry and the rubber and polymer product manufacturers that supply them, according to industry officials and experts.
China slides to No. 2 tire trading partner
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AKRON—Canada replaced China last year as the No. 1 trading partner of the U.S. in tires. The value of China's imports to the U.S.—impacted primarily by the cut in consumer tire...
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AKRON—Canada replaced China last year as the No. 1 trading partner of the U.S. in tires. AKRON—Canada replaced China last year as the No. 1 trading partner of the U.S. in tires. $AKRON—Canada replaced China last year as the No. 1 trading partner of the U.S. in tires.
ITC antidumping decision brings mixed reactions
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As with any decision regarding imported tires and tariffs and duties, there are winners and losers.That certainly is the case following the surprising Feb. 22 decision by the U.S. International...
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As with any decision regarding imported tires and tariffs and duties, there are winners and losers. As with any decision regarding imported tires and tariffs and duties, there are winners and losers. $As with any decision regarding imported tires and tariffs and duties, there are winners and losers.
Henkel, Benteler making composite leaf springs for Volvo
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DUESSELDORF, Germany—Laundry and personal care products-to-reactive polyurethane systems company, Henkel A.G. and automotive composites firm Benteler S.G.L. are supplying polyurethane...
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DUESSELDORF, Germany—Henkel and Benteler are supplying polyurethane composite leaf springs to the Volvo S90 and V90 following their introduction on the XC90 crossover SUV. DUESSELDORF, Germany—Henkel and Benteler are supplying polyurethane composite leaf springs to the Volvo S90 and V90 following their introduction on the XC90 crossover SUV. $DUESSELDORF, Germany—Henkel and Benteler are supplying polyurethane composite leaf springs to the Volvo S90 and V90 following their introduction on the XC90 crossover SUV.
Lubrizol invests to grow medical unit
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ANAHEIM, Calif.—Lubrizol Corp.'s LifeSciences unit has added thermoplastic polyurethane compounding abilities through a partnership with a medical compounder. Compounding Solutions, which...
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ANAHEIM, Calif.—Lubrizol's LifeSciences unit has added thermoplastic polyurethane compounding abilities through a partnership with a medical compounder. ANAHEIM, Calif.—Lubrizol's LifeSciences unit has added thermoplastic polyurethane compounding abilities through a partnership with a medical compounder. $ANAHEIM, Calif.—Lubrizol's LifeSciences unit has added thermoplastic polyurethane compounding abilities through a partnership with a medical compounder.
Doublestar inks Kumho deal, but Park counter-offer looms
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SEOUL, South Korea—China's Qingdao Doublestar Co. said it has signed an agreement with Kumho Tire creditors to buy a 42 percent stake in the South Korean tire maker in a deal that could...
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SEOUL, South Korea—Doublestar said it has signed an agreement with Kumho Tire creditors to buy a 42 percent stake in the South Korean tire maker in a deal that could enable Doublestar to further expand in China. SEOUL, South Korea—Doublestar said it has signed an agreement with Kumho Tire creditors to buy a 42 percent stake in the South Korean tire maker in a deal that could enable Doublestar to further expand in China. $SEOUL, South Korea—Doublestar said it has signed an agreement with Kumho Tire creditors to buy a 42 percent stake in the South Korean tire maker in a deal that could enable Doublestar to further expand in China.
Raumedic ready to chase new U.S. business
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ANAHEIM, Calif.—Raumedic A.G. is poised to make further inroads into the North American market now that it has a manufacturing presence in the region. Its first plant in the U.S., located...
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ANAHEIM, Calif.—Raumedic is poised to make further inroads into the North American market now that it has a manufacturing presence in the region. ANAHEIM, Calif.—Raumedic is poised to make further inroads into the North American market now that it has a manufacturing presence in the region. $ ANAHEIM, Calif.—Raumedic is poised to make further inroads into the North American market now that it has a manufacturing presence in the region.
Digital Edition
Digital Edition
Published on September 9, 2014

ITEC 2014 Paper 43: The Development and Application of a Methodology to Quantify Exposure to Nanoscale Amorphous Silica and Carbon Black During Tire Manufacturing

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Date Published September 9, 2014
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To date, no studies have been conducted to quantify exposure to nanoscale particles from the use of amorphous silica and carbon black in tire manufacturing.  Because both carbon black and amorphous silica are nanostructured materials, with primary particles in the nanoscale and aggregates and agglomerates of much larger size (up to 100 microns), exposure to nanoscale particles of these materials during tire manufacturing is expected to be negligible.  However, because of the strong sheer forces imparted by the mixer during rubber compounding, there is a potential to break apart the agglomerates.  In the absence of data to understand this hypothesis, we developed a methodology to determine if and to what degree workers were exposed to nanoscale particles of amorphous silica and carbon black during the tire manufacturing process.  In this study, we collected air samples using the Dekati Electrical Low Pressure Impactor (ELPI) in a tire manufacturing facility and developed a methodology to analyze the size-fractionated samples for carbon black and amorphous silica, using scanning transmission electron microscopy, coupled with electron dispersive spectroscopy.  This methodology allowed us to predict what percentage of particles were carbon black, amorphous silica, or "other" in an effort to semi-quantitatively understand the potential for worker exposure to these materials in the nanoscale.  Coupling this information with size-specific particle counts from the particle counting function of the ELPI, we were able to estimate size-specific air concentrations for carbon black and amorphous silica.  Based on the results of this analysis, we determinded that workers had potential exposure to nanoscale particles of carbon black and amorphous silica, previously determined to be improbable due to aggregation and agglomeration that naturally occurs with these materials.  However, the magnitude of nanoscale (d50 between 17 and 94 nm) exposure was low and unliely to represent a health risk, with nanoscale carbon black air concentrations ranging from approximately 8,900 to 77,600 particles/cm³ and nanoscale amorphous silica air concentrations ranging from approximately 400 to 22,200 particles/cm³.  With pending development of occupational exposure estimates for nanoscale materials, this methodology will allow occupational health and safety practitioners to estimate worker exposures to specific materials, even in scenarios where many particle types may be contributing to total particulate exposure.   Presented by Marisa Kreider, Managing Health Scientist, Cardno ChemRisk.

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