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Polyurethane-filled holes improve Wilson's swing
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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...
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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
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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...
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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
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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...
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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
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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...
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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
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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...
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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
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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...
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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
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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...
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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
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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 ...
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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
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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...
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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
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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...
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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 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