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从操作及工艺控制方面分析全钢载重子午线轮胎经常出现的胎里露线、胎圈露钢丝、胎体劈缝、胎里气泡、胎里窝气、胎趾圆角和胎侧欠硫外观质量缺陷的产生原因,并从设备改进、产品设计和工艺管理方面提出相应的解决措施.严格控制半成品尺寸、成型和硫化定型操作等可保证全钢载重子午线轮胎质量和生产效益. 相似文献
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研究硫化活性剂BL-1在全钢载重子午线轮胎胎冠胶中的应用。结果表明:在全钢载重子午线轮胎胎冠胶中采用硫化活性剂BL-1等量替代普通氧化锌,试验配方胶料的硫化特性和老化前后的物理性能与生产配方胶料相当,且满足生产工艺要求;成品轮胎的耐久性能满足相应国家标准要求;胶料中锌含量大幅减小,有利于环保,胶料成本降低。 相似文献
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试验研究活性纳米碳酸钙在全钢子午线轮胎胎侧胶中的应用。结果表明,在全钢子午线轮胎胎侧胶中添加10份活性纳米碳酸钙,胶料的硫化速度加快,硫化胶的硬度、拉断伸长率略有增大,拉伸强度、定伸应力相当,胶料生产成本降低,具有一定的经济效益。 相似文献
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介绍高温硫化半钢子午线轮胎缺胶、气泡、胎圈宽窄不一、胎里露线和欠硫等外观质量缺陷的产生原因,并提出相应解决措施.通过采取严格控制胶料混炼温度、合理设置模具排气孔、定期清洗模具、调整成型压力和硫化定型高度、合理选取帘线假定伸张值以及定期检查和更换硫化胶囊等措施,轮胎外观质量缺陷明显减少,产品的一次合格率显著提高. 相似文献
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我厂3号回转窑(Φ4m×60m)生产线在1996年年底由SP窑(产量912t/d)改为NSP窑(产量1320t/d),预分解系统为四级旋风预热器带离线式分解炉 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献
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Conclusions It is significant that the purification on a single passage of viscose through porous ceramic corresponds to the result of a two-stage filtration of it in industrial filter-presses with standard fillings.Kiev Combine. Kiev Technological Institute of Light Industry. Translated from Khimicheskie Volokna, No. 3, pp. 20–22, May–June, 1969. 相似文献
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A refined nonlinear value of the main parameter of a material, i.e., the elongation modulus versus the instant temperature value, was suggested for introduction into the computational algorithm of tempering stresses. 相似文献
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