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涤纶FDY、POY并网混纤丝的一步法研制 总被引:3,自引:1,他引:3
本公司在FDY纺丝机上成功地研制生产了一步法涤纶FDY、POY并网混纤丝。本文介绍了若干工艺技术关键并讨论了影响产品质量的因素。 相似文献
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炭素制品的质量与其生产过程中的各工序相关。其中与生制品的生产关系尤为密切。在生制品的生产过程中,混捏是比较重要的环节,提高混捏质量,对提高产品质量降低成本有着显著的作用。在采用双轴搅拌混捏锅的生产条件下,混捏温度和混捏时间是影响混捏质量的二大因素。在... 相似文献
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利用正交试验对6-氨基青霉烷酸结晶工艺优化。将酶裂解液加入有机溶剂苯乙酸,混相调等电点结晶,控制反应条件进行结晶正交试验,考察了影响结晶收率和产品质量的因素参数,筛选最优的结晶条件。通过试验结果得出较为理想的工艺控制条件,保证了产品质量和收率。 相似文献
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混料加工厂商在利用同一配方加工新批次的混配料时,要解决的共通性问题是混料产品质量的再现性.看起来这似乎很好解决,只需按最后一次生产那样的工艺步骤进行操作即可.但实际上存在多方面潜在因素的影响,使得他们不能如愿以偿.究其原因,首先要弄清楚与上一次加工操作的间隔时间,也就是说,加工间隔周期的长或短,对昆料产品质量的影响大不一样. 相似文献
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混捏工序是炭素生产的主要工序,而混捏机的优劣直接影响到炭素生产制品的质量,国内混捏机普遍存在搅刀轴头易漏料的现象,由于细粉的泄漏,影响到物料的配比,严重影响产品质量,同时污染环境,也对操作者的身体健康带来了损害,因此经过详细分析并结合国内外经验,对搅刀轴头密封进行了改进. 相似文献
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对一步法TCS +POY涤纶混纤丝沸水收缩率的影响因素进行分析探讨 ,认为纺丝速度是影响一步法TCS +POY涤纶混纤丝沸水收缩率的重要因素 ,冷却工艺条件、纺丝温度等亦有影响 相似文献
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为提高浮法玻璃原料化学需氧量(COD)的测定效率,研究了混酸消解法测定浮法玻璃原料COD值的影响因素和最佳实验条件。根据原料的物质组成、加工工艺及其在酸性水溶液中溶解能力的不同,浮法玻璃原料可分为易溶的化工原料、难溶的钙质矿物原料和难溶的硅质矿物原料三种类型。利用正交实验研究了不同原料种类、不同的硫酸和磷酸比例及其不同加入顺序、不同混酸消解时间等三种因素对混酸消解法测定COD值实验结果的影响,结合平行实验得到了混酸消解法测定不同类型原料COD值的最佳实验条件。研究结果表明不同种类原料COD值相差较大,硫酸和磷酸的最佳比例为4:1,最佳加入顺序是先磷酸后硫酸,化工原料的最佳消解时间为15min,矿物原料的最佳消解时间为30min。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 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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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献
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介绍了平板硫化机热板中高度在硫化排气过程中的作用及其实现途径和评价方法;提出了设置热板中高度时应遵守的"刚性横梁、柔性热板"概念和"最短路径、最小排气阻力"原则;探讨了横梁热变形对热板中高度的影响。结果表明,参考横梁热变形设置的热板中高度有助于解决平板硫化机在复杂状态下硫化制品时的表面排气问题。 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