Current Issue
×

Top Stories

Title Issue Date Category Formats Records Price
Polyurethane-filled holes improve Wilson's swing
View Description View Full Details
CHICAGO—Polyurethane is at the heart of the latest generation of Wilson's Distance D300 irons.The new golf clubs incorporate Power Holes, which are through-holes that surround the club's...
View Full Details »
CHICAGO—Polyurethane is at the heart of the latest generation of Wilson's Distance D300 irons. CHICAGO—Polyurethane is at the heart of the latest generation of Wilson's Distance D300 irons. $CHICAGO—Polyurethane is at the heart of the latest generation of Wilson's Distance D300 irons.
Editorial: Two deals show medical to remain a hot business area
View Description View Full Details
As the rubber industry entered into the new year, it’s clear that the medical industry will remain one of great activity. That was exemplified by two acquisitions closed late in 2016 where...
View Full Details »
As the rubber industry entered into the new year, it's clear that the medical industry will remain one of great activity. As the rubber industry entered into the new year, it's clear that the medical industry will remain one of great activity. $As the rubber industry entered into the new year, it's clear that the medical industry will remain one of great activity.
Withdrawal from NAFTA would cost U.S. jobs, study finds
View Description View Full Details
DETROIT— President-elect Donald Trump's vows to renegotiate the North American Free Trade Agreement (NAFTA) and pursue more protectionist trade policies likely would have a negative effect...
View Full Details »
DETROIT— President-elect Donald Trump's vows to renegotiate the North American Free Trade Agreement and pursue more protectionist trade policies likely would have a negative effect on the U.S. auto industry, a new study reveals. DETROIT— President-elect Donald Trump's vows to renegotiate the North American Free Trade Agreement and pursue more protectionist trade policies likely would have a negative effect on the U.S. auto industry, a new study reveals. $DETROIT— President-elect Donald Trump's vows to renegotiate the North American Free Trade Agreement and pursue more protectionist trade policies likely would have a negative effect on the U.S. auto industry, a new study reveals.
Semperit, Sri Trang demerge Thai gloves JV
View Description View Full Details
VIENNA—Austrian rubber company Semperit A.G. and its Thai partner Sri Trang Angro-Industry P.L.C. have agreed to demerge their Siam Sempermed rubber gloves joint venture, following a series...
View Full Details »
VIENNA—Austrian rubber company Semperit and its Thai partner Sri Trang have agreed to demerge their Siam Sempermed rubber gloves joint venture, following a series of legal disputes between the partners. VIENNA—Austrian rubber company Semperit and its Thai partner Sri Trang have agreed to demerge their Siam Sempermed rubber gloves joint venture, following a series of legal disputes between the partners. $VIENNA—Austrian rubber company Semperit and its Thai partner Sri Trang have agreed to demerge their Siam Sempermed rubber gloves joint venture, following a series of legal disputes between the partners.
Nexen, Toyota Tsusho establish sales JV
View Description View Full Details
TOKYO—Nexen Tire Corp. has established a sales subsidiary in Japan to handle its growing replacement tire business there, and to reinforce its OE supply relationships with Japanese...
View Full Details »
TOKYO—Nexen has established a sales subsidiary in Japan to handle its growing replacement tire business there, and to reinforce its OE supply relationships with Japanese automobile manufacturers. TOKYO—Nexen has established a sales subsidiary in Japan to handle its growing replacement tire business there, and to reinforce its OE supply relationships with Japanese automobile manufacturers. $TOKYO—Nexen has established a sales subsidiary in Japan to handle its growing replacement tire business there, and to reinforce its OE supply relationships with Japanese automobile manufacturers.
Kanodia sentenced for Cooper-Apollo insider trading scheme
View Description View Full Details
BOSTON—A Brookline, Mass.-based entrepreneur and private equity investor has been sentenced to 20 months in prison for initiating an insider trading scheme in connection with the failed...
View Full Details »
BOSTON—A Brookline, Mass.-based entrepreneur and private equity investor has been sentenced to 20 months in prison for initiating an insider trading scheme in connection with the failed acquisition of Cooper Tire by Apollo Tyres. BOSTON—A Brookline, Mass.-based entrepreneur and private equity investor has been sentenced to 20 months in prison for initiating an insider trading scheme in connection with the failed acquisition of Cooper Tire by Apollo Tyres. $BOSTON—A Brookline, Mass.-based entrepreneur and private equity investor has been sentenced to 20 months in prison for initiating an insider trading scheme in connection with the failed acquisition of Cooper Tire by Apollo Tyres.
Wacker to add fumed silica plant at Tennessee campus
View Description View Full Details
CHARLESTON, Tenn.—Wacker Chemie A.G. intends to invest $150 million to establish a new pyrogenic silica facility on the same site as its existing plant in Charleston. Construction is...
View Full Details »
CHARLESTON, Tenn.—Wacker intends to invest $150 million to establish a new pyrogenic silica facility on the same site as its existing plant in Charleston. CHARLESTON, Tenn.—Wacker intends to invest $150 million to establish a new pyrogenic silica facility on the same site as its existing plant in Charleston. $CHARLESTON, Tenn.—Wacker intends to invest $150 million to establish a new pyrogenic silica facility on the same site as its existing plant in Charleston.
Thailand building auto test center to support tire, NR sectors
View Description View Full Details
BANGKOK—The Thailand Board of Investment plans to invest $100 million to build an automotive testing center that the government views as a "top priority" for supporting the nation's growing ...
View Full Details »
BANGKOK—The Thailand Board of Investment plans to invest $100 million to build an automotive testing center that the government views as a "top priority" for supporting the nation's growing tire and natural rubber industries. BANGKOK—The Thailand Board of Investment plans to invest $100 million to build an automotive testing center that the government views as a "top priority" for supporting the nation's growing tire and natural rubber industries. $BANGKOK—The Thailand Board of Investment plans to invest $100 million to build an automotive testing center that the government views as a "top priority" for supporting the nation's growing tire and natural rubber industries.
Nexteer, Continental to form joint venture
View Description View Full Details
DETROIT—Nexteer Automotive Corp. and Continental Automotive Systems Inc. will form a joint venture to supply safety systems for autonomous cars.In an announcement Tuesday at the North...
View Full Details »
DETROIT—Nexteer and Continental Automotive Systems will form a joint venture to supply safety systems for autonomous cars. DETROIT—Nexteer and Continental Automotive Systems will form a joint venture to supply safety systems for autonomous cars. $DETROIT—Nexteer and Continental Automotive Systems will form a joint venture to supply safety systems for autonomous cars.
Toyo plans North American expansion
View Description View Full Details
WHITE, Ga.—Toyo Tire & Rubber Co. Ltd. plans to expand its North American research and development center, setting up a dedicated business development unit for the market. The firm, in...
View Full Details »
WHITE, Ga.—Toyo Tire plans to expand its North American research and development center, setting up a dedicated business development unit for the market. WHITE, Ga.—Toyo Tire plans to expand its North American research and development center, setting up a dedicated business development unit for the market. $WHITE, Ga.—Toyo Tire plans to expand its North American research and development center, setting up a dedicated business development unit for the market.
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

Have a question? Need some help?
Click here to view the FAQ

Tags

Date Published September 9, 2014
Category

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.