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Mexico prepares its defense of NAFTA
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MEXICO CITY—Mexican auto industry officials are lining up their arguments to defend the North American Free Trade Agreement against President-elect Donald Trump's campaign promise to...
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MEXICO CITY—Mexican auto industry officials are lining up their arguments to defend the North American Free Trade Agreement against President-elect Donald Trump's campaign promise to renegotiate the pact or throw it out altogether. MEXICO CITY—Mexican auto industry officials are lining up their arguments to defend the North American Free Trade Agreement against President-elect Donald Trump's campaign promise to renegotiate the pact or throw it out altogether. $MEXICO CITY—Mexican auto industry officials are lining up their arguments to defend the North American Free Trade Agreement against President-elect Donald Trump's campaign promise to renegotiate the pact or throw it out altogether.
Yokohama completes plant expansion in Philippines
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  CLARK FREEPORT ZONE, Philippines—Yokohama Tire Philippines Inc. has commissioned an expansion of capacity at its car and light truck tire factory in Clark Freeport Zone, which...
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CLARK FREEPORT ZONE, Philippines—Yokohama has commissioned an expansion of capacity at its car and light truck tire factory in Clark Freeport Zone, which exports the majority of its output to North America, Europe and other ASEAN countries. CLARK FREEPORT ZONE, Philippines—Yokohama has commissioned an expansion of capacity at its car and light truck tire factory in Clark Freeport Zone, which exports the majority of its output to North America, Europe and other ASEAN countries. $CLARK FREEPORT ZONE, Philippines—Yokohama has commissioned an expansion of capacity at its car and light truck tire factory in Clark Freeport Zone, which exports the majority of its output to North America, Europe and other ASEAN countries.
Fry: Market remains stagnant
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INDIANAPOLIS—Robert Fry isn't as pessimistic as most when it comes to the economy, but that doesn't mean he is optimistic. Manufacturing production has been flat for the last few years, and...
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INDIANAPOLIS—Robert Fry isn't as pessimistic as most when it comes to the economy, but that doesn't mean he is optimistic. INDIANAPOLIS—Robert Fry isn't as pessimistic as most when it comes to the economy, but that doesn't mean he is optimistic. $INDIANAPOLIS—Robert Fry isn't as pessimistic as most when it comes to the economy, but that doesn't mean he is optimistic.
ARDL purchases land, property for expansion
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AKRON—For the first time in more than a decade and a half, Akron Rubber Development Laboratory Inc. is expanding. The family run business recently completed the acquisition of an 11-acre...
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AKRON—For the first time in more than a decade and a half, Akron Rubber Development Laboratory is expanding. AKRON—For the first time in more than a decade and a half, Akron Rubber Development Laboratory is expanding. $AKRON—For the first time in more than a decade and a half, Akron Rubber Development Laboratory is expanding.
Barwell gear pump takes center stage
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PITTSBURGH—Barwell Global Ltd. and its U.S. subsidiary, Barwell Machinery USA Inc., exhibited the company's continuous performing gear pump and other high-precision rubber processing...
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PITTSBURGH—Barwell Global and its U.S. subsidiary, Barwell Machinery USA, exhibited the company's continuous performing gear pump and other high-precision rubber processing equipment at the International Elastomer Conference. PITTSBURGH—Barwell Global and its U.S. subsidiary, Barwell Machinery USA, exhibited the company's continuous performing gear pump and other high-precision rubber processing equipment at the International Elastomer Conference. $PITTSBURGH—Barwell Global and its U.S. subsidiary, Barwell Machinery USA, exhibited the company's continuous performing gear pump and other high-precision rubber processing equipment at the International Elastomer Conference.
New president excited to lead ASC
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INDIANAPOLIS—It has been a time of transition for the Adhesive and Sealant Council. William Allmond was named the association's new president in August, taking over for Matthew Croson, who...
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INDIANAPOLIS—It has been a time of transition for the Adhesive and Sealant Council as William Allmond took over as the association's new president in August. INDIANAPOLIS—It has been a time of transition for the Adhesive and Sealant Council as William Allmond took over as the association's new president in August. $INDIANAPOLIS—It has been a time of transition for the Adhesive and Sealant Council as William Allmond took over as the association's new president in August.
Firms use Career Fair to search for top talent
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PITTSBURGH—What is the current hiring situation in the rubber industry? It depends very much on which part of the industry and what kind of job, according to rubber industry executives...
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PITTSBURGH—Rubber industry recruiters say the current hiring situation in the rubber industry depends on which part of the industry and what kind of job. PITTSBURGH—Rubber industry recruiters say the current hiring situation in the rubber industry depends on which part of the industry and what kind of job. $PITTSBURGH—Rubber industry recruiters say the current hiring situation in the rubber industry depends on which part of the industry and what kind of job.
Bridgestone drives forward; Tire maker's plan includes recharging Firestone
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LOS ANGELES—Bridgestone Americas Tire Operations L.L.C. is recharging its Firestone brand for 2017 with four new tires, in addition to a new Bridgestone product and additional sizes for its...
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LOS ANGELES—Bridgestone Americas Tire Operations is recharging its Firestone brand for 2017 with four new tires, in addition to a new Bridgestone product and additional sizes for its Fuzion line. LOS ANGELES—Bridgestone Americas Tire Operations is recharging its Firestone brand for 2017 with four new tires, in addition to a new Bridgestone product and additional sizes for its Fuzion line. $LOS ANGELES—Bridgestone Americas Tire Operations is recharging its Firestone brand for 2017 with four new tires, in addition to a new Bridgestone product and additional sizes for its Fuzion line.
Trelleborg suspension springs bolster Turkish tram project
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TRELLEBORG, Sweden—Trelleborg’s industrial anti-vibration solutions operation expects to complete its delivery of suspension systems to a tram project in Turkey’s Kayseri within...
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TRELLEBORG, Sweden—Trelleborg's industrial anti-vibration solutions operation expects to complete its delivery of suspension systems to a tram project in Turkey's Kayseri within the first quarter of 2017. TRELLEBORG, Sweden—Trelleborg's industrial anti-vibration solutions operation expects to complete its delivery of suspension systems to a tram project in Turkey's Kayseri within the first quarter of 2017. $TRELLEBORG, Sweden—Trelleborg's industrial anti-vibration solutions operation expects to complete its delivery of suspension systems to a tram project in Turkey's Kayseri within the first quarter of 2017.
Hexpol adds new compounds to bio-based TPEs
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LONDON—Thermoplastic elastomer compounding group, Hexpol TPE, has added new compounds to its Dryflex Green family of bio-based TPEs, creating more opportunities for sustainability. Dryflex...
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LONDON—Thermoplastic elastomer compounding group, Hexpol TPE, has added new compounds to its Dryflex Green family of bio-based TPEs, creating more opportunities for sustainability. LONDON—Thermoplastic elastomer compounding group, Hexpol TPE, has added new compounds to its Dryflex Green family of bio-based TPEs, creating more opportunities for sustainability. $LONDON—Thermoplastic elastomer compounding group, Hexpol TPE, has added new compounds to its Dryflex Green family of bio-based TPEs, creating more opportunities for sustainability.
Digital Edition
Digital Edition
Published on March 25, 2013

Detecting and measuring hot blisters in tires

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Date Published March 25, 2013
Category Technical Papers

Dennis Reynolds, Starrett-Bytewise Division of L.S. Starrett Co.

A hot blister is a bulge in the surface of a cured tire caused by entrapped gasses or steam. Such blisters can be observed in the hot tires when they exit curing. Blisters often shrink as the gases migrate outward or are absorbed into the tire materials. There is concern, however, that the entrapped steam and gases present during curing can weaken the laminate structure of the tire. Air entrapment has been observed frequently by the author during capability studies conducted on tire-building machines. This paper presents cases showing entrapped air between the inner liner and body ply in a typical green tire carcass construction. Such air pockets can remain between the layers and migrate outward during tire curing to produce blisters. Air can also be absorbed into the tire structure. Steam and gases also can be introduced into the tire structure during curing and emerge as blisters after curing. This paper presents a method to detect blisters after curing and to detect entrapped air pockets during the tire-building stage. Scans of both cases are presented. These cases demonstrate that automatic monitoring systems can be implemented to detect these conditions. The method uses high-speed line laser sensors to digitize the sidewall and/or tread of the un-inflated tire. The data set is rendered as a 3D model. The data is post-processed and searched for blisters. This same sensor technology is employed to scan tire sidewalls for bulges and depressions.

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Technical Paper, Detecting and Measuring Hot Blisters in Tires