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Michelin debuts new high-performance adhesive
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CLERMONT-FERRAND, France—Michelin will be leaving an old industry standard behind with some of its lines of tires later this year. After more than nine years of research and development,...
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CLERMONT-FERRAND, France—After more than nine years of research and development, Michelin is launching a new high-performance resin adhesive designed for bonding textiles. CLERMONT-FERRAND, France—After more than nine years of research and development, Michelin is launching a new high-performance resin adhesive designed for bonding textiles. $CLERMONT-FERRAND, France—After more than nine years of research and development, Michelin is launching a new high-performance resin adhesive designed for bonding textiles.
A. Schulman sets June meeting to vote on merger
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FAIRLAWN, Ohio—A. Schulman Inc. has set June 14 as the date for a special meeting for shareholders to vote on a merger agreement with global plastics, chemicals and refining company...
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FAIRLAWN, Ohio—A. Schulman has set June 14 as the date for a special meeting for shareholders to vote on a merger agreement with global plastics, chemicals and refining company LyondellBasell. FAIRLAWN, Ohio—A. Schulman has set June 14 as the date for a special meeting for shareholders to vote on a merger agreement with global plastics, chemicals and refining company LyondellBasell. $FAIRLAWN, Ohio—A. Schulman has set June 14 as the date for a special meeting for shareholders to vote on a merger agreement with global plastics, chemicals and refining company LyondellBasell.
Tekni-Plex expands medical portfolio with Dunn Industries acquisition
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WAYNE, Pa.—Tekni-Plex Inc. is expanding its capabilities in specialty extruded medical tubing by acquiring Dunn Industries Inc. Financial details were not disclosed, but Tekni-Plex said the ...
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WAYNE, Pa.—Tekni-Plex is expanding its capabilities in specialty extruded medical tubing by acquiring Dunn Industries. WAYNE, Pa.—Tekni-Plex is expanding its capabilities in specialty extruded medical tubing by acquiring Dunn Industries. $WAYNE, Pa.—Tekni-Plex is expanding its capabilities in specialty extruded medical tubing by acquiring Dunn Industries.
Raw material prices still volatile
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WASHINGTON—Volatility in raw materials prices for tires and rubber goods has moderated since last year, but is far from gone, according to manufacturers and industry analysts. Tire...
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WASHINGTON—Volatility in raw materials prices for tires and rubber goods has moderated since last year, but is far from gone, according to manufacturers and industry analysts. WASHINGTON—Volatility in raw materials prices for tires and rubber goods has moderated since last year, but is far from gone, according to manufacturers and industry analysts. $WASHINGTON—Volatility in raw materials prices for tires and rubber goods has moderated since last year, but is far from gone, according to manufacturers and industry analysts.
Bridgestone, Goodyear to create 50/50 wholesale venture
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AKRON—Bridgestone Americas and Goodyear are combining their respective wholesale tire distribution assets into a 50/50 joint venture, called TireHub L.L.C., that will operate through 80-...
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AKRON—Bridgestone Americas and Goodyear are combining their respective wholesale tire distribution assets into a 50/50 joint venture, called TireHub, that will operate through 80-plus distribution centers nationwide. AKRON—Bridgestone Americas and Goodyear are combining their respective wholesale tire distribution assets into a 50/50 joint venture, called TireHub, that will operate through 80-plus distribution centers nationwide. $AKRON—Bridgestone Americas and Goodyear are combining their respective wholesale tire distribution assets into a 50/50 joint venture, called TireHub, that will operate through 80-plus distribution centers nationwide.
Impact of steel tariffs looms over industry
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WASHINGTON—Tire manufacturers still are assessing the possible effects of 25 percent tariffs on tire-quality steel wire rod imports to the U.S., but all indications are that the impact...
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WASHINGTON—Tire manufacturers still are assessing the possible effects of 25 percent tariffs on tire-quality steel wire rod imports to the U.S., but all indications are that the impact could be sweeping. WASHINGTON—Tire manufacturers still are assessing the possible effects of 25 percent tariffs on tire-quality steel wire rod imports to the U.S., but all indications are that the impact could be sweeping. $WASHINGTON—Tire manufacturers still are assessing the possible effects of 25 percent tariffs on tire-quality steel wire rod imports to the U.S., but all indications are that the impact could be sweeping.
Photo gallery: Ace shows off expansion
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RAVENNA, Ohio—At Ace Products and Consulting's open house on April 12, visitors showed up to see the facility after the company finished its most recent expansion. Ace added 3,500 square...
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RAVENNA, Ohio—At Ace Products and Consulting's open house on April 12, visitors showed up to see the facility after the company finished its most recent expansion. RAVENNA, Ohio—At Ace Products and Consulting's open house on April 12, visitors showed up to see the facility after the company finished its most recent expansion. $RAVENNA, Ohio—At Ace Products and Consulting's open house on April 12, visitors showed up to see the facility after the company finished its most recent expansion.
Continental developing aquaplaning warning system
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FRANKFURT, Germany—Continental A.G. engineers are developing an aquaplaning alert system that uses signals from surround-view cameras and tire-mounted electronic sensors to warn the...
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FRANKFURT, Germany—Continental engineers are developing an aquaplaning alert system that uses signals from surround-view cameras and tire-mounted electronic sensors to warn the vehicle's driver and engage active stabilization measures. FRANKFURT, Germany—Continental engineers are developing an aquaplaning alert system that uses signals from surround-view cameras and tire-mounted electronic sensors to warn the vehicle's driver and engage active stabilization measures. $FRANKFURT, Germany—Continental engineers are developing an aquaplaning alert system that uses signals from surround-view cameras and tire-mounted electronic sensors to warn the vehicle's driver and engage active stabilization measures.
Doublestar set to take control of Kumho
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SEOUL, South Korea—Qingdao Doublestar Group may finally be gaining control of Kumho Tire Co. Ltd.After nearly a year of offers, Kumho said in an April 1 statement that its management and...
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SEOUL, South Korea—Qingdao Doublestar Group may finally be gaining control of Kumho Tire. SEOUL, South Korea—Qingdao Doublestar Group may finally be gaining control of Kumho Tire. $SEOUL, South Korea—Qingdao Doublestar Group may finally be gaining control of Kumho Tire.
Commerce postpones countervailing duty determination on rubber bands
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WASHINGTON—At the request of Alliance Rubber Co., the U.S. Department of Commerce is postponing its countervailing duty determinations on rubber bands imported from China and Thailand until...
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WASHINGTON—At the request of Alliance Rubber, the U.S. Department of Commerce is postponing its countervailing duty determinations on rubber bands imported from China and Thailand until July 2. WASHINGTON—At the request of Alliance Rubber, the U.S. Department of Commerce is postponing its countervailing duty determinations on rubber bands imported from China and Thailand until July 2. $WASHINGTON—At the request of Alliance Rubber, the U.S. Department of Commerce is postponing its countervailing duty determinations on rubber bands imported from China and Thailand until July 2.
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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