特约来稿

• shiyifeng
• The Operation Status and Outlook of National Tire Industry In First Half of 2023

• 2023 Vol. 43(10): 0579-0586

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• Abstract:This paper analyses the general impact of the domestic and international environment on the development of tire industry，introduces the operation status of national tire industry in first half of 2023，and provides prospect for the development of tire industry in second half of the year and in the future.China""s tire industry has strong resilience and vitality under the complex and severe global political and economic environment and insufficient domestic demand.It is expected to attach importance to green and high-quality development and adjust and upgrade according to changes in market demand，meanwhile，overseas production bases is supposed to be established.Looking forward，the tire industry needs to gain new advantages in adversity to achieve high-quality development and become a intelligent manufacturing power.

Special and Comprehensive Review

• WANG Zhiyong,CHE Mingming and XIA Tianxiang
• Big Data System Creation based on Tire Load and Inflation Pressure

• 2023 Vol. 43(10): 0587-0589

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• Abstract:The corresponding inflation pressure was matched according to the tire load，so that the tire could be used under the best performance such as low rolling resistance and low abrasion，thus establishing the tire big data system.In the future，the big data of tires would be introduced into the vehicle intelligent control system，and the tires would be matched with the best inflation pressure through the vehicle automatic inflation and deflation system，which could improve driving safety，fuel saving，extend service life of tires，reduce vehicle operating costs，etc.

Structure Design

• sunbaoyu,Sun Jiaia and Lu Qiang
• Effect of Bead Width at Rim Seat on Performance of 7.00R16LT All-steel Light Truck and Bus Radial Tire

• 2023 Vol. 43(10): 0590-0593

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• Abstract:The effect of bead width at rim seat on the performance of 7.00R16LT all-steel light truck and bus radial tire was studied.The results showed that compared with the tire designed with the standard rim width for the bead width at rim seat，the wider design tire by half-inch for the bead width at rim seat increased the retraction displacement of the bead after being assembled on the standard rim，balanced the stress distribution between the bead and the shoulder，the shoulder contact pressure distribution was greatly improved，and the tire durability increased by 8%.

• XU Qin and ZHANG Ying
• Development of Low Shoulder Crown Ratio 12R22.5 Tubeless

• 2023 Vol. 43(10): 0594-0597

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• Abstract:The development of low shoulder crown ratio 12R22.5 tubeless truck and bus radial tire was introduced. The results showed that when the shoulder crown ratio of 12R22.5 tire was less than 1.3，it could meet the requirements of tire lightweight and reduce the design cost. The inflat periphal demention and strength performance of the finished tire met the requirements of the national standards，the durability and high-speed performance met the requirements of the design and enterprise standards，and the static grounding performance and rolling resistance coefficient met the requirements of the supporting OEM.

• ZHANG Yanlong,WANG Xuegang,YUE Zhen,LIU Benxin and YIN Haijian
• Design on 445/95R25 Tubeless All-steel Off-The-Road Radial Tire for All-Terrain Crane

• 2023 Vol. 43(10): 0598-0602

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• Abstract:The design on 445/95R25 tubeless all-steel off-the-road radial tire for all-terrain crane was described.In the structure design，the following parameters were taken：overall diameter　1 478 mm，cross-sectional width?448 mm，width of running surface　355 mm，arc height of running surface　12 mm，bead diameter at rim seat?630 mm，bead width at rim seat?286 mm，maximum width position of cross–section（ H/₁/H/₂）?0.96，using large radian block pattern design，pattern depth?25 mm，block/total ratio?64%，and number of pattern pitches?54.In the construction design，the following processes were taken：adopting cap compound and base compound double-layer tread design，3＋9＋15×0.225HT steel cord for belt，7×7×0.22＋0.15HT steel cord for carcass，one-step four-drum building machine for building and single-mode steamer curing press for curing.The results of finished tire performance test showed that the inflated peripheral dimention and durability met the requirements of national standards and enterprise standards respectively. The tire was equipped with an intelligent tire monitoring system to monitor the tire status in real time during driving，and timely remind the driver to stop and rest when the tire temperature or inflation pressure reached the alarm threshold，which improved the driving safety of the tire and extended the service life of the tire.

Material·Compounding

• jiajinyi,Liupeng and Ding Quanyong
• Application of Carbon Nanotubes in High Thermal Conductivity Curing Bladder for Passenger Car Tire

• 2023 Vol. 43(10): 0603-0606

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• Abstract:The application of carbon nanotubes in high thermal conductivity curing bladder for passenger car tire was studied.The results showed that，after replacing equal part of acetylene carbon black with 6 phr carbon nanotubes in the formula，the comprehensive physical properties of compound were good，the thermal conductivity coefficient increased，the production process performance was good，the used times of curing bladder increased，the curing time of tire was shortened，the curing efficiency was improved，and the production cost was reduced.

• sunbin,fuxiucheng,wangjingzhen,xuzhengrun,yongzhanfu and zhangzhenxiu
• Application of Several Adhesion Promoters in All-steel Radial Tire

• 2023 Vol. 43(10): 0607-0610

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• Abstract:The application of three adhesion accelerators，namely resorcinol，resorcinol resin，and phenolic resin in the carcass of all steel radial tire was studied.The results showed that the Shore A hardness and tensile stress of resorcinol vulcanizate were higher，while the tear strength and elongation at break of phenolic resin and resorcinol resin vulcanizate were higher.The initial extraction force of phenolic resin vulcanizate and steel wire cord was relatively high，and the extraction force and retention rate of resorcinol and resorcinol resin vulcanizate and steel wire cord were relatively high after aging.The compression heat generation and loss factor of phenolic resin vulcanizate at 60 ℃ were significantly higher than those of resorcinol and methyl resin vulcanizate.In actual production，the formula and process should be adjusted and optimized based on the characteristics of raw materials and application performance to obtained the best comprehensive performance.

• ZHOU Baozhen,LIU Feng,JIN Xueyun,LIU Zhongwei,DING Cuiliu,GAO Ting and SUN Xuejie
• Application of Low Rolling Resistance Modifier YG-G300 in Bead Compound of Aircraft Tire

• 2023 Vol. 43(10): 0611-0614

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• Abstract:The application of low rolling resistance modifier YG-G300（abbreviated as YG-G300） in bead compound of aircraft tire was studied.The results showed that YG-G300 could enhance the force between carbon black and rubber.Adding 1～3 phr of YG-G300 to the bead compound，the Mooney viscosity，modulus and crosslinking density of the compound increased，the scorching time slightly prolonged，the curing rate slightly slowed down，and the anti-reversion property significantly improved.The hardness，modulus，tensile strength and wear resistance of the vulcanizate were improved，the heat build-up was reduced，and the high temperature resistance was improved.When the dosage of YG-G300 was 2 phr，the high temperature resistance of the compound was the best，and the comprehensive physical properties were good.

• liyi,zhangpeng,zhengbin,zhangchao,zhengmaosen,chenhongtao and wangmign
• Application of 3＋8×0. 21ST Steel Cord in Bead Chafer of Truck and Bus Radial Tire

• 2023 Vol. 43(10): 0615-0618

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• Abstract:The application of 3 ＋ 8×0. 21ST steel cord in the bead chafer of truck and bus radial tire were studied. The results showed that，compared with 3＋9×0. 22＋0. 15HT steel cord，3＋8×0. 21ST steel cord had better compound permeability and smaller steel cord diameter，which could reduce the calendering thickness and cord fabric weight，increased the strength. By using 3 ＋ 8×0. 21ST steel cord to replace 3 ＋9×0. 22＋0. 15HT steel cord in the bead chafer of truck and bus radial tire，the durability of the finished tire was improved，and the weight and cost of tire was reduced，which was conductive to the lightweight of tire.

Technology · Equipment

• XU De-peng,qinyi and chenshanjiao
• Energy-saving Application of Steam in Vulcanization Workshop

• 2023 Vol. 43(10): 0619-0622

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• Abstract:The modifacations on energy-saving application of steam in vulcanization workshop of tire factory were introduced.Through the change of the external pressure steam condensate drainage mode from the traditional timed condensate drainage to the liquid level condensate drainage＋forced condensate drainage when the temperature and pressure were abnormal，and optimization of high-pressure steam condensate drainage mode during non vulcanization state，the significant energy-saving effect was achieved with the help of the energy management system and the MES system to strengthen the energy management.At the same time，the on-site temperature and noise were reduced to improve the working environment through the on-site steam leakage control.This modifacation work could provide some reference for tire factory in steam energy saving.

• zhangchao,shaoxianxing,wanghao,chenhongtao,liyi and sunkai
• Cause Analysis of Steel Cord Stiffening in Carcass of Truck and Bus Radial Tire after Building Inflation and Corrective Actions

• 2023 Vol. 43(10): 0623-0627

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• Abstract:The causes of steel cord stiffening in the carcass of truck and bus radial tire was analyzed and the corrective actions was proposed.The main reason of steel and siffening in the carcass was the adhesive property between the steel cord and the compound decreased，the steel cord was slightly separated from the compound after building and inflation，and the steel cord on the axial surface of the cord was prominent.The adhesive property between the steel cord and the compound could be improved by adjusting the formula of the compound，and the calendering quality of the steel cord fabric could be improved by adjusting the calendering and building processes，and the stiffening of the carcass steel cord could be solved，and the durability of finished tire was proved.

Test·Analysis

• JIANG Xiaofeng,LIU Quanlai,LU Fumei,HAN Jun,WANG Xiaolong and XU Qijun
• Effect of Equilibrium Condition on Property Test Results of Bio-base Polyamide 56 Dipped Cord

• 2023 Vol. 43(10): 0628-0633

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• Abstract:The effect of equilibrium conditions on properties of bio-based polyamide 56（PA56） dipped cord was studied and compared with nylon 66（N66） dipped cord.The results showed that the effects of equilibrium conditions on the strength，elongation at break and elongation at constant load of the bio-based PA56 dipped cord and N66 dipped cord were slightly different.The pre-drying conditions had certain influence on the physical properties of the bio-based PA56 dipped cord，and the difference between the properties of bio-based PA56 moisture absorbing cord（moisture recovery rates was 2.55%） and dry cord （moisture recovery rates was 0.90%） was obvious.When the relative humidity increased from 55% to 98%，the moisture recovery rate of bio-based PA56 dipped cord changes more than that of N66 dipped cord.Bio-based PA56 dipped cord had good flexural fatigue resistance and dynamic mechanical properties.

• An Shuang,WU Jian,Li Yanbin,SU Benlong and WANG Youshan
• Thermal-mechanical Coupling Simulation of Aircraft Tire under Different Slip Conditions

• 2023 Vol. 43(10): 0634-0638

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• Abstract:The finite element simulation analysis was carried out for the rubber wheel，and a thermal-mechanical coupling process considering friction heat build-up and hysteresis heat build-up was established.According to the curve of slip rate of aircraft tire changing with temperature during landing，the temperature field distribution of the rubber wheel under different slip rates was studied.The results showed that with the decreased of slip rate，the surface temperature of the contact area of the rubber wheel decreased gradually，the distribution range of the heat build-up temperature inside the rubber wheel increased continuously，and the heat build-up temperature increased gradually.In the process of decreasing the slip rate from 0.8 to 0.2，the maximum temperature of the overall temperature field of the rubber wheel appeared in the contact area of the outer surface，and with the decreased of the slip rate，the maximum temperature of the rubber wheel gradually decreased.

Domestic and Foreign News

• 利
• 一种雪地轮胎花纹

• 2023 Vol. 43(10): 0586-0586

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• 利
• 一种2＋1＋6结构的钢帘线及其制备方法

• 2023 Vol. 43(10): 0586-0586

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• 利
• 一种废轮胎裂解炭黑活化装置

• 2023 Vol. 43(10): 0593-0593

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• 利
• 一种超耐磨轮胎胎面胶、制备方法、应用和超耐磨轮胎

• 2023 Vol. 43(10): 0593-0593

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• 赵敏
• 赢创岚星扩大在华橡胶硅烷产能

• 2023 Vol. 43(10): 0597-0597

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• 利
• 一种越野轮胎生产装置

• 2023 Vol. 43(10): 0602-0602

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• 利
• 一种智能轮胎柔性应变传感器及其制备方法

• 2023 Vol. 43(10): 0602-0602

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• wangwenxia
• 北橡院主办期刊《橡胶工业》被全球最大的文摘与引文数据库Scopus收录

• 2023 Vol. 43(10): 0606-0606

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• dongjiyang
• 第二十一届中国国际橡胶技术展览会在上海举办

• 2023 Vol. 43(10): 0614-0614

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• 赵敏
• 益阳橡机两项金属加工工艺获奖

• 2023 Vol. 43(10): 0638-0638

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• 赵敏
• 精算“节流账” 深挖“盈利点” 神马帘子布紧日子里“抠”效益

• 2023 Vol. 43(10): 0638-0638

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• Abstract: