用VC062型聚合管生产尼龙6高粘切片

用VC062型聚合管生产纺制帘子线用尼龙6高粘切片。对设备及工艺进行了改造,提高进料管的物料温度,提高物料在前聚合器的开环速率,增加排水措施,促进VK管中产物分子量的提高。     

聚酰胺纤维

20021064聚酞胺6生产技术和聚合物改性的持续发展Bergman K.;Chemleal Fibers International .2000,50,(6).p,536(英)尼龙6制造技术包括聚合物连续式和间歇式生产技术和高性能尼龙6的生产都适合运用高速纺。一步法聚合使用VK管,它由下部的柱塞流区和上部的混合伏组成。己内酞胺在进入VK管前受到由推流区回收的能量的预热。两步法聚合是在VK管聚合前,使用在仄力下高水份的预聚合。高性能尼龙6特点是改善J”挤出能力的熔化物、热学、化学、服用性的稳定,这是由一J:加入了作为链稳定剂的三二梭酸和改善染色性能的的酸胺添加剂。(姚慧婉)…     

工艺及设备

20031230PA6生产的新成本效益Stibal W.;Chemieal Fibers International Man一MadeF iber Year Book,2001,p.sl(英)Ems xnventa一Fischer建造日产130吨尼龙6一步法聚合物生产装置和日产250吨两步法聚合物生产装置。生产工艺包括:聚合、蒸馏、进料、再聚合,蒸发、萃取和干燥。浓缩萃取水再聚合在VK管于大气压力下进行以减少环状二聚物浓度。将环状二聚物浓度降至热力学平衡水平是可能的,但温度和时间必须与其相适应。改进后的VK管可将环状二聚物浓度降至1.2%。标准VK管的环状二聚物浓度为2.2%。用再聚合原料生产的尼龙6产品质量与那…     

国内外尼龙6聚合管的差距

针对国内外尼龙６生产厂家所使用的聚合ＶＫ管进行了比较．与国外同行业相比，认为我国的聚合管无论从产量还是产品质量均处于技术落后状态，聚合管内部结构简单，所生产的产品质量差。德国Ｚｉｍｍｅｒ公司设计的ＶＫ管较先进，结构设计合理，当前在技术上处于领先水平。对国产ＶＫ管存在的问题提出一些看法。     

锦纶66帘子线直捻机的节能方式及效果探讨

介绍了锦纶66帘子布生产中帘子线直捻机的两种节能方式,对比分析了实际生产中国产K3501B普通型直捻机与进口阿尔玛CC3普通型及CC4节能型直捻机的节能情况,探讨了国产K3501B普通型直捻机的节能改造措施。结果表明:阿尔玛CC4节能型直捻机相比CC3型直捻机及国产K3501B型直捻机,其节能效果最优,相比CC3型节能比率为8%~24%;CC3型直捻机比国产K3501B型直捻机节能,节能比率为7%~15%;CC3型直捻机在品种相同的情况下,锭速和捻度越低,生产中吨布耗电越低;通过减小国产K3501B普通型直捻机加捻部件中的储纱盘直径和加捻盘直径、优化直捻机锭罐形状、降低锭速等方式,改造后的国产K3501B型直捻机的吨布耗电与改造前相比,节能比率达10%~12%。     

零触发调功控制在VK管加热控制中的应用

本文针对国内目前VK管采用的二位或调节温控方式进行了分析,指出其温控方面的不足之处,为了进一步提高产品质量把二位式调节温控方式改进为零触发调功控制。通过一年多的实践证明,改进后的VK管各段温度传热均匀,温控精度高,对提高VK管生产的产品质量起到了很大的作用。     

杭州杭鼎尼龙技术公司尼龙6装置投产

正杭州杭鼎尼龙技术公司与伍德伊文达菲瑟公司于2014年8月宣布,已成功投产了纺织级高性能尼龙6生产装置。该装置位于浙江省杭州市经济技术开发区,并使用了伍德伊文达菲瑟公司的Virgin Lactam过程(VLP),生产半切片的高性能尼龙6添加剂(HPPA)47kt/a。聚合反应在先进的专有的单级VK管内进行,其生产能力为130 t/d。该技术业已被开发,可用于生产高性     

杭州杭鼎尼龙技术公司尼龙6装置投产

<正>杭州杭鼎尼龙技术公司与伍德伊文达菲瑟公司于2014年8月1日宣布,已成功投产了提供纺织级应用的高性能尼龙6生产装置。该装置位于浙江省杭州市经济技术开发区,并使用了伍德伊文达菲瑟公司的Virgin Lactam过程(VLP)生产高性能尼龙6,产能为4.7万t/a。聚合反应在先进的专用的单级VK管内进行,能力为130 t/d,生产的高性能织物用聚合物具有高的均匀度、优异的热稳定性和抗紫外线性能,可满足最高的纺丝质量标准,因此适合于制造非常细的FDY长丝。伍德伊文达菲瑟的供应范围包括技术许可、高性     

两广9.00-20轮胎旺销

采用嫁接技术利用国产纺丝设备生产轮胎用尼龙6帘布用丝     

含油MC尼龙的摩擦磨损特性及应用

本文对黑龙江省尼龙厂研制的含油MC尼龙的摩擦磨损性能进行了测试,并与英国尼拉卡斯特有限公司生产的含油MC尼龙进行了比较。结果表明国产含油尼龙的性能基本达到或超过进口材料,比普通MC尼龙和固体润滑剂改性MC尼龙的耐磨减摩自润滑性有明显改善。最后对含油MC尼龙在造纸和橡胶工业上的成功应用做了介绍。     

PA6水解聚合反应数学模型及其实验验证

建立了PA6熔体在VK管中边流动边聚合的聚合反应数学模型,采用流态显示技术和文献报道的测定数据验证了数学模型的可靠性,还研究了熔体在具有优化科挡板内部结构的VK管中流过10块交替排列的挡板过程中停留时间分布、单体的转化率、产物的聚合度的变化规律,并从聚合指标反证了挡板结构的合理性。     

己内酰胺发展前景广阔

介绍了己内酰胺和尼龙-6的用途，通过大量的统计数据，论述了世界、亚洲及我国己内酰胺和尼龙-6的生产、消费、价格、发展的情况，对我国目前己内酰胺、尼龙-6以及尼龙-6工程塑料的发展前景作了比较详实的介绍。     

抗静电增强尼龙6的研制

以非离子和阴离子型抗静电剂组成复合抗静电体系，用玻璃纤维为增强剂，研制成具有良好的抗静电和机械性能的抗静电增强尼龙６，研究了抗静电复合体系构成，玻璃纤维含量对抗静电增强尼龙６性能的影响，并对其流变性能进行了考察。     

Polyamide-6 polymerization and its melt flow in the VK tube reactor with optimized baffle structure

The flow mechanism of Polyamide-6 (PA6) melt over conical perforated baffles in the VK tube is elucidated by computerized analysis based on a rational assumption of Stokes' flow. The governing equations for a two-dimensional flow are solved by the finite difference method to generate the stream function profile, velocity field and residence time distribution. Optimization of the geometries of the baffle structure brings about a uniform residence time distribution, so as to ensure a homogeneous extent of reaction for the final product. The complete mathematical model for PA6 polymerization while flowing through the VK tube was established according to PA6 hydrolytic polymerization kinetics. The optimized baffle structure was shown to be compatible with the desired polymerization variables.     

己内酰胺聚合管V型挡板的研制

在己内酰胺直型聚合管设计中采用了 V型挡板 ,经模拟试验和实际应用 ,效果均十分明显。采用 V型挡板改善聚己内酰胺熔体的径向混合效果 ,有效地减少己内酰胺熔体的径向温差 ,确保聚合物相对分子质量的稳定     

Evaluation of degradation on Nylon-6 and Nylon-6/montmorillonite nanocomposite by color measurement

An evaluation of degraded level is an important subject for industrial products. Ordinarily, many kinds of polymer material changes its color through the degrading process by altering its chemical structure, and IR and UV are applicable to ensure the production of the functional groups. However, these methods are hardly applicable to measurements of product on site without the sample collection. A spectrophotometer is sufficiently lightweight, compact, and capable of measurements on site without the sample collection. With these backgrounds, the correlation of the color with the tensile strength and the molecular weight was studied by using the spectrophotometer. Through the thermal aging test at various temperatures, specimens became yellowish and the increase rate of color change was different between neat Nylon-6 and Nylon-6 nanocomposite. Such changes were closely related to the tensile strength and the molecular weight. As a method to evaluate the polymer degradation, the correlation of the difference of yellowness index (ΔYI) with the tensile strength and the molecular weight was sufficiently high and the ΔYI indicated a difference between neat Nylon-6 and Nylon-6 nanocomposite. From these results, it is found that the color measurement with the spectrophotometer is a practical method for evaluation of polymer degradation. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Orientation and structure development in melt-spun Nylon-6 fibres

A network model is applied to describe the deformation behaviour of melt-spun Nylon-6 fibres obtained at different spinning and drawing conditions. The network draw ratio is determined from analysis of true stress-strain curves and correlated with fibre orientation. From this analysis it appears that the deformation behaviour of Nylon-6 fibres adheres to a pseudo-affine mechanism. The results are discussed in terms of the semicrystalline nature of Nylon-6 fibres. By means of on-line birefringence measurements, wide angle X-ray scattering (WAXS) and solid-state NMR, it is shown that the crystalline and amorphous phases in Nylon-6 respond in a different way to network deformation. In the spin line, an affine (rubber-like) deformation mechanism is observed and this rubber-like network behaviour is transferred to the amorphous phase. After winding and conditioning of the spun fibres, a crystalline phase with relatively high orientation is formed which deforms according to a pseudo-affine mechanism upon further stretching.     

THE FAILURE OF THERMOCOUPLE PROTECTION TUBES IN GLASS MELTING FURNACES1

The unusually rapid failure of thermocouple protection tubes when used in glass furnace atmospheres has been found to be due to reaction of the volatilized alkalis in the atmosphere with the aluminum silicates of the tube. Failure of the tubes is due either to differential thermal contraction between the outer reaction layer and the inner unaltered layer of the tube on cooling or to actual corrosion and dripping away of the tube. It is suggested that the use of a much higher percentage of alumina and lower percentage of silica in the tubes may prevent failures from this cause.