全钢子午线轮胎胎面破边的原因分析及解决措施

从口型设计和胶料粘度等方面分析全钢子午线轮胎胎面破边产生的原因,并提出相应解决措施。通过采取后进胶口宽度与口型正面宽度差值为40～50 mm、后进胶口总高度与预口型高度比值为0. 65～0. 75、总宽膨胀因数为1. 06～1. 08、注意清除胶料杂质和检查胶料门尼粘度及保证挤出压力等措施,全钢子午线轮胎胎面边部厚度及破边缺陷得到有效控制,既提高了胎面质量合格率,又降低了制造成本。     

具有轮辋保护结构轮胎常见缺陷的原因分析及解决措施

分析具有轮辋保护结构轮胎常见缺陷的产生原因,并提出相应的解决措施。胎体帘布打压方式不合理、胎侧打压方向错误、三角胶高度设计不合理、三角胶打压不实、胎侧尺寸设计不合理、成型鼓宽度偏大、工艺操作不到位等均会导致具有轮辋保护结构的轮胎出现胎体帘布打褶、耐磨胶形状异常等缺陷。通过合理设计三角胶和胎侧尺寸、调整打压方式、严格执行工艺管理和操作规范等措施可以有效减少轮胎缺陷。     

轮胎复合胎面脱层原因分析及解决措施

分析轮胎复合胎面脱层的产生原因并提出相应解决措施。胎面胶门尼粘度偏高、停放时间和环境温度变化大、终口型开型系数不匹配、机头流道和预口型设计不合理、挤出机转速过大、胎面挤出温度过高、机头压力偏低等均会造成复合胎面脱层和气泡现象，采取严格控制胎面胶门尼粘度、改善停放环境、优化终口型开型系数、重新设计机头流道和预口型形式、减小挤出机转速和提高挤出机机头压力等措施，有效解决了轮胎复合胎面脱层问题。     

轮胎胎圈敷贴质量控制

分析影响轮胎胎圈敷贴质量的因素,并提出相应解决措施。三角胶用终炼胶门尼粘度和硬度偏高、三角胶根部几何形状设计和三角胶结构设计缺陷、三角胶生产参数异常、部件尺寸不合格、设备精度不达标以及物料存放环境温度和湿度不合适等均会造成胎圈敷贴质量不合格。通过采取严格控制三角胶用胶料性能、优化三角胶口型设计、制定三角胶设计参数对照表、固定三角胶生产参数、确保部件尺寸合格和设备精度达标以及固定物料存放环境条件等措施,保证了胎圈质量的合格率。     

轮胎挤出半成品部件脱层的原因分析及解决措施

分析挤出半成品部件脱层的原因并提出相应解决措施。流道和预口型设计不合理、终口型开型系数不匹配、机头压力小、胶料停放时间和环境温度变化大、胶料门尼粘度偏高、挤出机转速大、排胶温度高等均会造成挤出半成品部件脱层，采取重新设计机头、改善胶料存放环境、降低胶料门尼粘度、调整生产工艺参数等措施，有效解决了挤出半成品部件脱层问题。     

一种双复合三角胶挤出强制分配型预口型

设计一种双复合三角胶挤出强制分配型预口型,可解决双复合三角胶生产中贴合面形状不固定、断面形状不均匀和软质三角胶与硬质三角胶贴合精度不够等问题,使得软质三角胶和硬质三角胶高精度贴合,提高三角胶的生产质量。     

三胶分布的调整与控制

对我公司的三复合挤出机生产的载重胎面的三胶分布进行了调整,对三复合挤出机的预口型进行了研究设计,并加工了相应的工装进行了批量生产,结果表明,在三复合挤出生产线生产的载重胎面的三胶分布能稳定的控制在要求的标准之内,有效的控制了下层胶的高度,使下层胶的高度在硫化后不再外露,解决了花纹沟底部裂口的问题。     

全钢子午线轮胎胎面挤出强制式口型板的设计技术

介绍全钢子午线轮胎胎面挤出强制式口型板的设计技术。根据胎面胶经过挤出流道、预口型板和口型板时所受的剪切作用,分析导致挤出胎面破边、凸台、气孔和脱层缺陷的口型设计问题,采用强制式挤出方式,通过采取统一预口型板、固定口型板开型系数和恒比例开型等措施,胎面一次挤出不良率降低,挤出胎面形状和尺寸满足设计要求,挤出过程稳定,生产效率提高。     

全钢载重子午线轮胎胎面挤出脱层的原因分析及解决措施

分析全钢载重子午线轮胎胎面挤出过程中胎冠胶与基部胶脱层问题。通过调整口型和预口型尺寸、进一步优化开型因数以及冠胶和基部胶出胶比例等措施,胎面挤出脱层质量缺陷明显减少,返回胶量减小,胎面生产成本和能耗降低。     

全钢载重子午线轮胎耐磨胶与钢丝圈包布打褶的原因分析及解决措施

分析成型工序全钢载重子午线轮胎耐磨胶与钢丝圈包布打褶的原因，并提出相应的解决措施。通过采取适当减小耐磨胶宽度、钢丝圈包布外侧定位、将钢丝圈包布胶片包边改为出边结构、修改胎圈三角胶形状使胶料表面平滑过渡、成型机反包臂充气压力不小于0.6 MPa和压合后退速度为（400±100） mm·s-1^{、缩短胎坯停放时间、胶囊鼓成型机采用助推胶囊及确保耐磨胶胶料门尼粘度不小于65等措施，有效解决了轮胎耐磨胶和钢丝圈包布打褶问题。}     

乙烯酮(双乙烯酮)下游产品废水的治理技术

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。     

A study of miscibility of blends of polybutadienes of varying microstructure

The miscibility of various amorphous polybutadienes with mixed microstructures of 1,4 addition units (cis, 1,4 and trans 1,4) and 1,2 addition units have been investigated. The studies here involved optical transparency, differential scanning calorimetry, and small angle light scattering. It was found that a 90 percent (cis) 1, 4 addition polybutadiene was immiscible with high (91 percent) 1,2 addition polybutadiene. Reduction of the 1,2 content to 71 percent induced an upper critical solution temperature (UCST) with the cis 1,4 polymer. Polybutadienes with 50 percent and 10 percent 1,2 contents were miscible above the crystalline melting temperature of the cis 1,4 polybutadiene. Immiscibility of the 91 percent 1,2 addition polymer was also found with a 10 percent 1,2 polybutadiene. The latter polymer also exhibits an UCST with the 71 percent 1,2 polymer. The results are used to interpret the characteristics of blends of polybutadienes of varying microstructure.     

几种乙炔加压设备性能的比较

阐述并比较了几种加压设备在乙炔加压清净过程中的性能和特点。     

粉煤灰中烧失量检测的不确定度分析

以F类粉煤灰为例,详细介绍了测定粉煤灰中烧失量的步骤、计算数学模型、影响测量不确定度的因素以及各项测量不确定度分量评定,人员、设备、材料、方法、环境都是影响测量不确定的因素。     

生物油的成分分析及物性测定

以添加FeCl2的ZnCl2-KCl混合熔盐裂解纤维素和秸秆,制得生物油。采用傅立叶变换红外光谱法和气相色谱-质谱法分析生物油的成分。结果表明,生物油中成分复杂,含有氧元素、多种有机化合物,主要包括酮类、醛类、酚类及羧酸类等。测定了20～80℃生物油的密度和粘度,发现生物油的密度与温度呈较好线性关系,而生物油的粘度均大于水的粘度,且不同熔盐体系对秸秆生物油的粘度无较大影响。     

Effect of degree of deacetylation of chitosan on the kinetics of ultrasonic degradation of chitosan

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     

分解炉扩径的技术改造

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     

Process of acceleration of filtration of viscose

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.