共查询到20条相似文献,搜索用时 78 毫秒
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我国聚氯乙烯行业现状与发展趋势 总被引:2,自引:0,他引:2
介绍了近年我国PVC树脂生产能力、产量、消费量、进出口,列出了主要企业产能,并与世界和日本、德国、美国的一些情况进行了比较。总结了我国PVC行业的特点,并提出了几点看法。 相似文献
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主要介绍了醚化反应的机理,明确了反应温度、反应压力、醇烯比、空速等参数对异丁烯与甲醇反应生成甲基叔丁基醚(MTBE)这一个可逆放热反应的影响。从而优化了操作条件,该善了MTBE产品及醚后碳四产品质量、降低了生产成本、提高了经济效益。 相似文献
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F370密炼机主机由于长时间使用有了很多故障。介绍了改造前F370密炼机主机的基本状况。对卸料装置、密封装置、混炼室、转子及支承装置、上顶栓、主减速机等部件的具体存在缺陷、改造工艺及方案、具体改造过程及需要注意的细节等作了详细介绍。最后总结了改造效果,对一些没有达到预期效果的改造提出了进一步改造的意见。 相似文献
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介绍了移动式胶带硫化机的主要技术参数。分析了硫化机主体结构多部分的设计特点、计算公式。对热板、液压缸、热板传动系统、主机驱动机构等部分的设计计算、选型分析作了详细的说明。 相似文献
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纸—塑复合粘合剂及其使用中常见问题探讨 总被引:4,自引:1,他引:4
本文介绍了目前国内几种常用的纸一塑复合粘合剂及使用过程中经常出现的问题和应注意的事项,讨论了问题产生的原因,并提出了解决办法。 相似文献
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Anna Rudawska Elżbieta Bociąga Ewa Olewnik-Kruszkowska 《Journal of Adhesion Science and Technology》2013,27(3):327-344
The paper presents selected aspects of the effect of primers on adhesive properties and strength of aluminium sheet adhesive joints, made using polyurethane adhesives. The strength of adhesive joints was determined based on two cure time variants: 15 and 64 h. It was found that the longer cure time at a humidity of 33% is more desired, as it leads to a substantial increase in strength of the tested adhesive joints. In addition, two variants of surface preparation were applied: degreasing and degreasing followed by the application of a primer (a pro-adhesive agent). It was observed that the primer application prior to the application of an adhesive leads to a significant increase in strength compared to the variant where the adhesive application is preceded only by degreasing. Moreover, the aluminium sheet surface that was subjected to cataphoretic painting and priming exhibits better adhesive properties. It has a higher value of both surface free energy and its dispersion and polar components compared to the surface that was only subjected to degreasing. 相似文献
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Donald J. Progar Terry L. St. Clair Akihiro Yamaguchi Shoji Tamai 《The Journal of Adhesion》1995,54(1):103-114
The poly(keto-imide), LARCTM-TPI, was developed in the late 1970's and has proven to be remarkable stable as a high temperature adhesives. Thermal aging results that were generated at both NASA Langley Research Center and at Boeing Aerospace Company proved this material to be stable in adhesive bond form for at least 60,000 hours at 232°C. A commercial form of LARCTM-TPI was made available in the mid-to-late 1980's by Mitsui Toatsu Chemicals, Inc. (MTC). Since that time, MTC has optimized the process for manufacturing LARCTM-TPI with the major improvements being in molecular weight control. Most recently, MTC synthesized a derivatized version of LARCTM-TPI which contains pendant phenoxy moieties. This material is soluble in a number of organic solvents and it exhibits outstanding melt-flow properties which make it attractive as a hot-melt-processable polyimide adhesive. The synthesis and characterization of this novel material is the subject of this research paper. 相似文献
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介绍了国产CR-224型氯丁橡胶技术性能和加工应用技术。其中可接枝的CR-244将是氯丁胶粘结剂行业很有潜力的新产品,该产品的工业化生产改善了国产CR-224不能与MMA接枝的缺陷,接枝共聚合的胶粘剂技术性能达到GB7126-86标准要求,接枝效果与A90相近。 相似文献
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国产SIS及其在胶粘剂中的应用 总被引:20,自引:2,他引:18
本文结合岳阳石化总厂橡胶厂生产的1105和1209两种新牌号的SIS的性能和结构特点,论述了SIS配制溶剂型胶剂、热熔型压敏胶、妇女卫生巾用胶粘剂的配方特点及应用情况。 相似文献