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Hangzhou, China

Shi X.,Qingdao University of Science and Technology | Ma M.,Qingdao University of Science and Technology | Lian C.,Qingdao University of Science and Technology | Zhu D.,Hangzhou Zhongce Rubber Co.
Polymer Testing | Year: 2013

The effects of dynamic fatigue frequency, temperature and number of cycles on the adhesion of rubber to steel cord in a carcass recipe were examined. A new test method with special rubber/steel cord specimens was developed for the dynamic fatigue measurements which were carried out on a De Mattia Rubber Flexometer. It was found that the dynamic "pull-out forces" decreased with increase of fatigue frequency, but first increased and then decreased with increasing temperature and the number of fatigue cycles. The adhesion failure mainly occurred in the rubber phase rather than at the rubber/steel cord interface. The covered rubber on the "pulled-out" cord after fatigue appeared to form a screw thread and the greater pull-out force corresponded to more uniform and clearer screw threads in the rubber remaining on the cord. Steel cord with an outer wrapping wire had greater static adhesion force and better adhesion after fatigue; the adhesion failure mainly occurred in the rubber phase but some occurred at the contact point of the outer wrapping wire and the wrapped main steel wires. The screw threads of rubber coverage appeared along the twist direction of the outer wrapping wire. SEM indicated that un-dispersed filler agglomerates may initiate adhesion failure. © 2013 Elsevier Ltd. All rights reserved.


Shi X.,Qingdao University of Science and Technology | Ma M.,Qingdao University of Science and Technology | Lian C.,Qingdao University of Science and Technology | Zhu D.,Hangzhou Zhongce Rubber Co.
Journal of Applied Polymer Science | Year: 2014

The effects of adhesion promoters, cobalt decanoate and PN759 (modified resorcinol) on the static and dynamic adhesion properties of rubber/steel cord in a carcass recipe are examined. A new testing method with special rubber/steel cord specimens was developed. It was found that cobalt decanoate could improve the static adhesion and favored the dynamic adhesion of rubber/steel cord so that adhesive failure mainly occurred in rubber phase. A resorcinol- formaldehyde-silica promoting system was deleterious to adhesion stability, but improved initial adhesion strength. PN759 improved the dynamic mechanical properties compared with resorcinol for the carcass vulcanizates at strains less than 10%. PN759 instead of resorcinol slightly improved the static and dynamic adhesion and the probability that adhesion failure occurred in the interphase was similar to that occurring in the rubber phase. The dynamic "pull-out forces" for samples with 1.0 phr cobalt decanoate first increased and then decreased with the increase in the number of fatigue cycles and reached a maximum at 100,000 fatigue cycles. The covered rubber on the "pulled-out" cord after fatigue appeared to form a screw thread form and the greater pull-out force corresponded to more uniform and narrower screw threads. SEM images indicated that un-dispersed filler agglomerates could be the initiating factor for adhesive failure. © 2013 Wiley Periodicals, Inc.


Trademark
Hangzhou Zhongce Rubber Co. | Date: 2012-12-20

Tires for vehicles; tyres and inner tubes for motorcycles; tires for electric cars; inner tubes for electric cars; tires for childrens bicycles; tires for bicycles and cycles; treads for retreading tyres; adhesive rubber patches for repairing tubes or tires; inner tubes for bicycles; inner tubes for cycles; inner tubes for automobile tires; repair kits for repairing vehicle inner tubes; casings for pneumatic tires; tire liners.


Trademark
ZHONGCE RUBBER GROUP COMPANY Ltd and Hangzhou Zhongce Rubber Co. | Date: 2008-08-26

Railway rolling stock; cars; motorcycles; wheels of automobiles; bicycles; bicycle wheels; tricycles; bicycle pumps; funicular railcars; motorized luggage carts; baby carriages; sleighs; tires for land vehicles; pneumatic tyres and inner tubes for motorcycles; tires for electric cars; inner tubes for electric cars; tires for childrens bicycles; tires of bicycles; treads for retreading vehicle tires; adhesive rubber patches for repairing tubes or tires; inner tubes for bicycles; inner tubes for automobile tires; tires for landing gear wheels of aircraft; repair kits for repairing vehicle inner tubes; boats; tire liners; automobiles; engines for land vehicles; upholstery for vehicles.


Trademark
ZHONGCE RUBBER GROUP COMPANY Ltd and Hangzhou Zhongce Rubber Co. | Date: 2011-06-29

Tires.

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