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研究了含二嵌段苯乙烯-异式二烯-苯乙烯嵌段共聚物(SIS)产品中,三嵌段分子量和二嵌段分子量的相互影响,及对产品物性及应用性能的影响.结果表明,含二嵌段SIS分子量的调控对产品的挥发分、机械力学性能及热熔压敏胶的应用性能有着重要的影响. 相似文献
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苯乙烯-异戊二烯线型三嵌段(SIS)中加入一定量苯乙烯-异戊二烯两嵌段(SI)对于改进SIS热熔压敏胶性能有一定影响,主要考察不同分子量、嵌段比及含量的SI对线型SIS的力学性能、流动性能及制成热熔压敏胶的性能的影响,结果表明,线型三嵌段SIS中,掺入10%~30%(质量分数)的两嵌段SI,对产品的力学性能影响不明显,对产品的硬度、流动性能有一定影响;将掺有两嵌段SI的线型SIS制成热熔压敏胶后,产品的粘合性能较单纯使用线型SIS做热熔压敏胶有所改善。 相似文献
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介绍风力空压机用内骨架橡胶防护罩的配方设计、产品和模具设计、生产工艺及产品性能特点。采用钻孔钢板为骨架材料,克服了钢网骨架材料制品受力易扭曲变形及硬质塑料制品受到冲击力易破碎等缺陷,产品具有较强的耐天侯老化及抗冲击性能,达到国内同类产品水平。 相似文献
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介绍了内骨架耐热橡胶密封圈的配方设计、产品和模具设计、生产工艺及产品性能特点。主体橡胶选用三元乙丙橡胶。适量加入粘合剂用以提高与金属骨架的粘接力。产品截面设计成G形结构。外侧橡胶圆环为密封唇部,内侧埋设金属骨架并预留2个胀紧孔,安装时定位准确、密封压力大。金属骨架截面设计成横T形结构减小应力集中提高粘接力,外侧增设螺纹和沟槽,增大了橡胶与金属骨架的接触面。该产品具有耐热性能好、结构合理、使用寿命长等特点。 相似文献
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《玻璃钢/复合材料》1977,(3)
一、产品结构 产品结构如下图所示。 二、产品性能 1.套筒在封闭状态下承受10公斤/厘米~2外压,一小时后不变形,无渗水、漏水现象; 2.铜嵌件与玻璃钢的粘结力大于2000公斤; 3.套筒耐海水腐蚀,经30周期(24小时为一周期)海水浸泡,表面无气泡、皱皮等 相似文献
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灯具外罩是用透明有机玻璃料制作,本文通过对嵌件和外罩注塑的介绍,围绕外罩产品特点,进行必要产品重量的控制,用重量控制法达到产品质量。经生产实践验证,重量控制法能满足外罩成型要求,符合生产需要,操作简便可行,产品能得到用户的认同。 相似文献
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Transmission Electron Microscopy and Microanalytical Studies of Ion-Beam-Thinned Sections of Tricalcium Silicate Paste 总被引:1,自引:0,他引:1
Mature tricalcium silicate cement pastes were examined in ion-beam-thinned sections. The microstructure consisted of very homogeneous amorphous hydrate gel surrounding residual unhydrated cores of tricalcium silicate, these regions being linked by a fibrillar outer hydration product. Carbonation had produced microcrystals of calcite within the outer product only. X-ray microanalysis gave Ca: Si ratios for the hydrate regions which showed considerable deviations but were-on average in fairly good agreement with indirectly determined Ca: Si ratios of pastes of the same material. There was no significant difference in composition between inner and outer hydration products. 相似文献
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对40000m^3/h空分装置内、外压缩流程进行了热力计算,对比了外压式、半内压式、全内压式流程所需功耗的高低,分析了产品能耗指标的影响因素,根据不同装置的实际情况,对压缩流程进行了优化选择。 相似文献
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Venkat Venkatasubramanian Chunhua Zhao Girish Joglekar Ankur Jain Leaelaf Hailemariam Pradeep Suresh Pavankumar Akkisetty Ken Morris G.V. Reklaitis 《Computers & Chemical Engineering》2006,30(10-12):1482
Informatics infrastructure plays a crucial role in supporting different decision making activities related to pharmaceutical product development, pilot plant and commercial scale manufacturing by streamlining information gathering, data integration, model development and managing all these for easy and timely access and reuse. The foundation of such an infrastructure is the explicitly and formally modeled information. This foundation enables knowledge in different forms, and best manufacturing practices, to be modeled and captured into tools to support the product lifecycle management. This paper discusses the development of ontologies, Semantic Web infrastructure and Web related technologies that make such an infrastructure development possible. While many of the issues addressed in this paper are applicable to a wide spectrum of molecular-based products, we focus our work on the development of pharmaceutical informatics to support Active Pharmaceutical Ingredient (API) as well as drug product development as case studies to illustrate the various aspects of this infrastructure. 相似文献
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N. McHugh 《Journal of the American Oil Chemists' Society》1981,58(5):A464-A466
Critical parameters in selecting the most appropriate packaging for soap and detergent products are reviewed. Included among
these parameters are package strategy, features required for consumer utilization, competitive products, cost limitations,
availability of materials having adequate chemical resistance to product, overall dimensions and construction details, machinability
of selected design, pallet pattern or shipping configuration, physical strength of individual package and outer case, ability
to withstand storage and handling rigors. Guidelines and criticality tests are reviwed briefly as tools for evaluating and
projecting the effect of a given parameter on acceptability of the finished package. 相似文献
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以中高档桥车塑料外饰件涂装产品的生产和工艺开发过程为例,介绍了汽车涂装外饰件产品机器人涂装程序的编制方法和程序调试的过程。 相似文献
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防止彩晶钢化玻璃发霉的包装方式探讨 总被引:1,自引:0,他引:1
玻璃在高温、高湿的环境下容易发霉,以彩晶钢化玻璃为例,用不同的包装方式进行高温高湿试验,结果表明,包装前使玻璃干燥、玻璃之间覆吸水性好的平整纸、外包装密封、阻止水气到达玻璃表面,可以有效抑止玻璃发霉。 相似文献
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:用户在装配驾驶室前悬衬套时,该产品的塑料外管断裂率较高.通过对该产品的失效模式、相关各生产过程分析,识别出外管断裂的影响因素.优化了注塑模具设计,对塑料材质、橡胶硬度、天然胶可塑度等方面进行实验设计,对工艺加以优化,通过试验验证,确定塑料外管的强度为主要影响因素,通过优化显著的降低了驾驶室前悬衬套在装配时的断裂率. 相似文献
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通过对固体氯化物催化合成丁酸系列酯的研究, 证明该催化剂具有廉价易得, 反应时间短, 操作方便, 无三废污染等优点, 其最高酯化率和产品纯度均在98 % 以上。 相似文献