Special and Comprehensive Review

• MU Shouyong,XU Lihong,LI Shuhuan,ZHENG Rui and LI Miaomiao
• Interpretation of New Mandatory National Standards GB 9743 and GB 9744

• 2024 Vol. 44(10): 0579-0583

  [Abstract](37)

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• Abstract:Introduce the basic situation of two mandatory national standards，GB 9743—2024“Passenger car tyres”and GB 9744—2024“Truck tyres”，and provide a detailed interpretation of the revised tire parameters，safety performance indicators，tire markings，as well as the newly added tire rolling resistance performance，wet road surface relative grip performance，judgment rules，and transition period for standard implementation.The implementation of the new standards is conducive to reducing tire rolling resistance，improving tire product performance，promoting the transformation and upgrading of China’s tire enterprises，and adjusting product structure.

• ZHANG Lei,GAO Jian,ZHANG Yunxiu,HE Fujin,GE Chao and CHANG Shuangkai
• Research on Performance of OEM Tire for Special Vehicle Based on Finite Element Simulation

• 2024 Vol. 44(10): 0584-0588

  [Abstract](42)

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• Abstract:Based on the finite element simulation method，taking OEM 395/85R20 tire for MV3 vehicle as the research object，the influence of the formula，profile and structure on the durability and high-speed performance of the tire was studied.The results showed that by applying EVEC compound，and adjusting the profile and structure design and so on，the durability and high-speed performance of the tire were improved while reducing its mass.

Structure Design

• LIU Fang,WANG Yi and CUI Zhibo
• Influence of Sidewall Reinforcement Components on Rolling Resistance of Radial Tires

• 2024 Vol. 44(10): 0589-0592

  [Abstract](53)

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• Abstract:Taking 205/55R16 91V steel-belted radial tires as the object，the influence of sidewall reinforcement components on the rolling resistance of radial tires was studied using finite element analysis method and experiments.The results indicated that adding sidewall reinforcement components could reduce the rolling resistance of tires，among which the sidewall compound，outer protective compound，and appex components had the greatest reduction in rolling resistance，and the closer to the sidewall reinforcement component area was，the greater the reduction in rolling resistance was.

• YU Hui,ZHAN Qixuan,HU Hong and XU Meihua
• Finite Element Optimization Design on 12R22.5 All-steel Truck and Bus Radial Tire Based on Abaqus Software and Orthogonal Experiment

• 2024 Vol. 44(10): 0593-0597

  [Abstract](21)

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• Abstract:Based on Abaqus finite element analysis software，the orthogonal experimental schemes for the outer contour parameters of 12R22.5 all-steel truck and bus radial tire was analyzed，and the optimal schemes were obtained.The optimal schemes were simulated and analyzed to select the running surface height of 4 mm，crown radius of 600 mm，and shoulder radius of 170 mm of tire as the optimum solution by comparing Mises stress，maximum strain energy density gradient，contact area，maximum contact pressure and other indicators.

• ZHAO Yuna,LI Ziqi,ZHANG Baoliang,SUN Shumei,SONG Peng and ZHOU Yunlin
• Design on ST225/75R15 All-steel Trailer Special Tire

• 2024 Vol. 44(10): 0598-0600

  [Abstract](41)

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• Abstract:The design on ST225/75R15 all-steel trailer special tire was introduced.In the structural design，the following parameters were taken：overall diameter　710 mm，cross-section width　220 mm，width of running surface　180 mm，bead diameter at rim seat　379 mm，adopting trailer tire special patterns，pattern depth　9 mm，block/total ratio　74.7%，and number of pattern pitches　63.In the construction design，the following parameters were taken：adopting wave shape design for tread，4＋3×0.33ST steel cord for 1^# and 2^# belt，3＋8×22ST steel cord for carcass，using two-drum one-stage building machine to build tires and hot plate press to cure tires.The finished tire performance test results showed that the inflated peripheral dimension，strength，high-speed performance and durability all met the corresponding design and national standards.

Material·Compounding

• LIANG Xue,WANG Lufei,XU Jingjing,DONG Kang,LIU Wenguo,CHEN Yating,ZHAO Xiaodong,ZHANG Mengmeng,HUANG Yigang and WU Youping
• Effect of Functionalization of SSBR on Properties of Silica/SSBR Composite

• 2024 Vol. 44(10): 0601-0605

  [Abstract](38)

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• Abstract:The effect of functionalization modification of solution polymerized styrene butadiene rubber （SSBR） on the properties of silica/SSBR composite was investigated.The results showed that compared with the SSBR compound without silane coupling agent，the Mooney viscosity and torque of the SSBR compound with silane coupling agent decreased，t5 was prolonged，and the t90 was shortened.Compared with unmodified SSBR compound，the hardness and modulus at 10% of the functionalized modified SSBR compound decreased，the modulus at 300% and tensile strength increased，and the wear resistance improved.The dispersibility of silica improved，the Payne effect of the compound was weakened，the hysteresis loss and the rolling resistance was reduced，and the wet slip resistance was improved.

• LIU Zhihao,XIAO Shankui,LIU Yongqiang,XU Qi and LI Chongbing
• Application of Pyrolytic Carbon Black in Bead Heel Componnd of All-steel Truck and Bus Radial Tire

• 2024 Vol. 44(10): 0606-0610

  [Abstract](37)

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• Abstract:The application of pyrolytic carbon black in bead heel componnd of all-steel truck and bus radial tire was studied.The results showed that replacing 5 phr of carbon black N330 with 10 phr of pyrolysis carbon black in the bead heel componnd，the processability and physical properties of the compound were basically equivalent，the loss factor at 60 ℃ and the compression set decreased，the durability performance of finished tires were good，while the cost of the bead heel compound was effectively reduced.

• YU Shaoyi,JIN Qi,HU Yuan and MU Chengqian
• Application of New Sustainable Silane Coupling Agent NXT Z 45 in Green Tire Tread Compound

• 2024 Vol. 44(10): 0611-0615

  [Abstract](41)

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• Abstract:The application of the new sustainable silane coupling agent NXT Z45 in green tire tread compound was studied，the effect of silanization reaction times on the properties of the compound was investigated and the comparison with coupling agent Si69 was conducted.The results showed that，in the case of reducing the substitution of coupling agent Si69，silane coupling agent NXT Z45 could improve the dispersibility of silica in the rubber matrix，enhance the processing performance and storage stability of the compound，reduce the rolling resistance of the vulcanizate，improve the wet skid resistance and maintain equivalent basic physical properties.In addition，ensuring sufficient silanization reaction time could improve the wear resistance of vulcanizate.

• WANG Chuanzhu,GUO Yongfang,ZHAO Jun,WANG Yinzhu and GUO Zhen
• Application of High Tear and Cutting Resistance Modifier EN-01 in Shoulder Pad Compound of Off-The-Road Radial Tire

• 2024 Vol. 44(10): 0616-0619

  [Abstract](734)

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• Abstract:The application of high tear and cutting resistant modifier EN-01（abbreviated as EN-01） in the shoulder pad compound of off-the-road radial tire was studied.The results showed that by adding EN-01 in the shoulder pad compound，the scorching time of the compund was shortened，t₉₀ was prolonged，and the anti-reversion property was improved.The hardness and modulus of the vulcanizate was decreased，the elongation at break was increased，the tensile strength，compression heat build-up and dynamic mechanical properties changed little，while the tear resistance and aging resistance was improved，the durability of the finished tire improved.

• SONG Wentao,XIN Yuanhang and LI Chaofan
• pplication of Resorcinol-Formaldehyde Bond System in Sidewall Compound of Off-The-Road Bias Tire

• 2024 Vol. 44(10): 0620-0623

  [Abstract](35)

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• Abstract:The application of resorcinol-formaldehyde bond system in sidewall compound of off-the-road bias tire was stuied.The results showed that，adding a resorcinol-formaldehyde bond system and appropriately increasing the sulfur content in the sidewall compound formula，the vulcanization characteristics of the compound changed little，and the crosslinking density increased.The modulus and tensile strength of the vulcanizate remained basically unchanged，while the tear strength，fatigue resistance，heat aging resistance and bending crack growth resistance were improved，heat build-up was reduced，and ozone aging resistance remained unchanged.The adhesion strength between the sidewall compound and the cord fabric was improved.

• ZHAI Mingrong,WANG Jun,MENG Zhaohong,YU Chenglong,SONG Meiqin and SHI Caixia
• Influence of Thermal Shrinkage and Permanent Deformation of Fiber Cords on Grounding Performance of Passenger Car Radial Tire

• 2024 Vol. 44(10): 0624-0628

  [Abstract](33)

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• Abstract:The influence of thermal shrinkage and permanent deformation of fiber cords（930dtex/2 modified nylon 66 cord and 1670dtex/2 polyester cord） on the grounding performance of passenger car radial tire was studyied.The results showed that the plastic strain generated by the fiber cords increased with the increase of post cure inflation（PCI） tension.When the PCI tension was large enough，the plastic strain curve of the fiber cords tended to be consistent.Compared with untreated cords，the modulus of heat-treated cords increased with the increase of PCI tension.Compared with the process without PCI，under the same inflation pressure and radial load，the long axis of the footprint of PCI tires becomed shorter，the short axis of the footprint becomed longer，the footprint was more square，and the inflated cross-sectional width and inflated cross-sectional width under load of PCI tires increased.

Technology · Equipment

• GONG Lu,WANG BIingang,LI Haipeng and JIANG Ziyuan
• Analysis on Dynamic Balance Variation of 7.00R16 All-steel Radial Tire

• 2024 Vol. 44(10): 0629-0632

  [Abstract](40)

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• Abstract:Based on the actual production situation of all-steel radial tires，the reasons for the dynamic balance fluctuations of 7.00R16 tire were analyzed，and the corresponding solutions were proposed.By adopting the improvement measures，such as adding automatic correction devices，timely replacement of calendering rollers and roller cores under inner liner calendering process，and ensuring simultaneous opening of both sides of the sidewall，strengthening operation training and precision verification of the building equipment under the building process，the first level product rate of tire dynamic balance was increased by 12.49%.

• XU Junhao,WU Xiaohua,RONG Qi and YUAN Mengdan
• Influence of Electron Irradiation Dose on Inner Liner Compound Penetration in Tire

• 2024 Vol. 44(10): 0633-0635

  [Abstract](26)

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• Abstract:Through the irradiation on the carcass cord with an electronic irradiation pre-vulcanization device，the influence of electron irradiation dose on the inner liner compound penetration in tire and the cord strength were researched.The results showed that the inner liner compound penetration decreased as the irradiation dose increased，while the cord strength had little change with the increase of irradiation dose，and did not decrease.Based on the structure design requirements of the tire，it was determined that the inner liner compound penetration could be controlled less than 25% under the premise of irradiation dose of 40 and 50 kGy.By the electronic pre-vulcanization technology，the inner liner compound penetration into the carcass cord compound could be effectively prevented to realize the replacing the transition layer to save cost.

Test·Analysis

• LI Jin,LIU Fang and GUO Lei Lei
• Influence of Wire Ring Position on Bead Pressure of Steel-belted Radial Tire

• 2024 Vol. 44(10): 0636-0639

  [Abstract](41)

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• Abstract:Using finite element simulation technology to establish the three-dimensional tire model and rim model，the influence of wire ring position on the bead pressure of steel-belted radial tires was studied.The results indicated that the finite element simulation method could accurately simulate bead pressure，and its accuracy depended on the accuracy of the tire model and modeling method.The modeling method of the wire ring had a significant impact on the bead pressure.The bead pressure was sensitive to change of the horizontal position of the wire ring（represented by the horizontal distance W from the outer end of the wire ring to the outer end of the rim）.The smaller W was，the lower the bead pressure was，and the larger W was，the higher the bead pressure was.

Domestic and Foreign News

• wanghong
• 第二十二届中国国际橡胶技术展览会在上海举办

• 2024 Vol. 44(10): 0583-0583

  [Abstract](12)

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• 赵敏
• 一种航空轮胎胎面粘合胶及其制备方法

• 2024 Vol. 44(10): 0592-0592

  [Abstract](14)

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• SU Juqiao
• 贵州轮胎党委书记、董事长黄舸舸任第七届全国轮胎轮辋标准化委员会主任委员

• 2024 Vol. 44(10): 0605-0605

  [Abstract](14)

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• chumin
• 全球轮胎行业保持向好态势

• 2024 Vol. 44(10): 0619-0619

  [Abstract](14)

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• chumin
• 通用股份柬埔寨二期项目首胎成功下线

• 2024 Vol. 44(10): 0632-0632

  [Abstract](17)

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• 赵敏
• 一种高温环境下轮胎模具自动激光清洗装置及方法

• 2024 Vol. 44(10): 0632-0632

  [Abstract](20)

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• Abstract: