水辅注塑工艺及应用进展

水辅注塑的开发起步工作尽管晚于气辅注塑工艺,但水辅注塑工艺已逐渐找到更多合适的应用场合。目前,水辅注塑成型的聚酰胺制品,已应用作输送流体介质的汽车管道,其它的应用实例还有车门塑料拉手、以及车内用于搁置手臂的塑料部件。与气辅注塑工艺相比,水辅注塑工艺进一步缩短了成型周期,所以水辅注塑的开发成功,将会带来可观的经济效益。     

新牌号尼龙产品

<正>据"www.ptonline.com"报道,巴斯夫工程塑料(在美国密歇根州怀恩多特)推出用注水技术优化的2个新牌号产品Ultramid尼龙66。与气体辅助注射成型中空塑料件相比,用注水技术注射成型的中空塑料件具有较大的内部空间和更平滑的内表面。新增加的2种牌号产品是:Ultramid A3HG6WIT,Ultramid A3WG7WIT。新牌号Ultramid A3HG6WIT产品具有抗水解性,可应用于汽车冷却管。     

水辅与气辅成型残余壁厚的对比研究

在实验的基础上,首先分析了水辅注射成型与气辅注射成型的特点,并从机理上分析了水辅成型和气辅成型制件残余壁厚的形成,进而对比分析了水辅及气辅成型制件残余壁厚的大小。结果表明,对于具有流动方向偏转结构的模具,水辅成型制件的壁厚均匀性优于气辅成型制件;水辅成型更易于生产截面为圆形的制件。     

水辅注射成型工艺新进展

塑料模具制造商现正更多地关注塑料水辅注射成型技术(WIT),例如,德国Hoffmann公司专为Opel牌轿车制造了用于加工车门拉手的水辅注射成型模具,奥地利模具制造商JosefHaidlmair公司已经制造了一套用来注塑可折叠板条箱的模具,这种可折叠板条箱专设计应用于Schoeller Wavin系统方面,其侧面板是采用水辅注塑技术加工而成.     

国内首推水辅注塑成型技术

<正>近日,巴斯夫和德国PME fluidtec公司联合浙江世纪华通汽车零部件公司,共同在国内推出水辅注塑成型技术(WIT),促进了中空塑料零件制造业的技术升级。据介绍,华通公司采用巴斯夫专为WIT开发的玻纤增强聚酰胺66 Ultramid解决方案,使产品实现了良     

尼龙6工程塑料树脂的生产与应用及其新产品开发

介绍了国内外尼龙６工程塑料树脂的应用、生产与新产品开发情况,提出了国内尼龙６工程塑料的开发方向     

聚酰胺树脂的品种和技术

聚酰胺树脂(PA)习惯上称为尼龙,是五大工程塑料中消费量最大、品种最多、资格最老的一种。开始主要用于合成纤维工业,但由于其机械性能优良、耐化学性能好、易改性,适用于多种工艺成型加工,现在的用途已十分广泛。     

水辅成型技术在自行车前叉上的应用

基于纯水液压水辅助注射成型设备,将水辅成型技术与传统注塑行业结合起来,以自行车前叉为模具,成型自行车前叉制件.主要从制件水穿透长度,中空率及残余壁厚等方面对试验结果进行分析,结果表明,在适当注塑工艺参数条件下.水辅成型技术能应用于自行车前叉的成型.     

国内首款水辅注塑成型汽车部件问世,促进汽车轻量化

(上海2012年5月4日)巴斯夫和德国PME fluidtec股份有限公司联合浙江世纪华通汽车零件有限公司,共同在国内推广水辅注塑成型技术(WIT),促进中空塑料零件制造业的发展。华通公司采用了巴斯夫专为水辅注塑成型技术开发的玻纤增强聚酰胺66——Ultramid WIT解决方案,实现了良好的表面质量和耐化学性能。最近华通获得了上海大众(SVW)汽车公司和上海汽车工业集     

国内首款水辅注塑成型汽车部件问世

巴斯夫和德国PMEfluidtec股份有限公司联合浙江世纪华通汽车零件有限公司，共同在国内推广水辅注塑成型技术（WIT），促进中空塑料零件制造业的发展。     

试剂溴化钾与工业溴化钾联合生产工艺

在以尿素还原法生产KBr的基础上，利用甲醇的沉淀作用，开发了一种联合生产品试剂和工业品的工艺。获得的试剂质量优于分析纯。     

尼龙用着色剂

本文简单介绍了尼龙的种类、性能,综述了尼龙用着色剂的特点、种类及应用情况,着重介绍了尼龙用有机颜料的种类、重要品种及其合成方法。     

尼龙用着色剂

本文简单介绍了尼龙的种类、性能,综述了尼龙用着色剂的特点、种类及应用情况,着重介绍了尼龙用有机颜料的种类、重要品种及其合成方法。     

尼龙（聚酰胺）66聚合技术研究进展

介绍了尼龙（聚酰胺）66熔融聚合、固态聚合和界面聚合等聚合技术的研究状况,分析总结了相关的研究思路和手段。以工业化应用转化为目标,指出熔融聚合单线产能提升有限,但工艺成熟稳定;固态聚合和界面聚合基础研究不足,但具有节能降耗和安全环保特征。针对我国尼龙66聚合技术研究和工业生产的实际,建议尼龙66聚合技术的研究,在借鉴先进的数学和计算机手段以及在现有工艺流程的基础上,进行模型化研究和过程强化技术开发并采用工业运行数据修正模型,借此指导工业生产和技术。     

Diluent selection for Nylon 11 and Nylon 12 thermally induced phase separation systems

Nylon 11 and Nylon 12 are commercially important polymers due to their unique combination of mechanical strength, chemical resistance, and processability. Products have been prepared from these polymers via thermally induced phase separation (TIPS) for many years. Nevertheless, known diluents for Nylon 11 and 12 pose specific processing problems, and it would be desirable to find a diluent that allows low processing temperatures, has a high flash point, is inexpensive, and exhibits low toxicity. This work investigated a variety of alternative diluents not previously documented in the literature. A fundamental study was also performed to determine which factors are important in selecting a diluent for preparing Nylon liquid–liquid TIPS membranes. The information gathered in this study, including phase diagrams for all feasible systems investigated, will be important in shaping future formulation work for Nylon use in microporous membranes. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43237.     

回收尼龙的扩链改性

尼龙由于其优异的性能被广泛应用,但尼龙的再生利用面临很大的困难。通过双螺杆挤出研究环氧聚合型扩链剂KL-E4370用量、吸酸剂的品种、共混条件对回收尼龙扩链改性效果的影响。实验结果表明,环氧聚合型扩链剂KL-E4370用量为2%,吸酸剂氧化镁用量为2%,加工温度230℃,主机频率为8 Hz下改性效果最好。     

新型MC尼龙催化剂简介

介绍原捷克国家科学院无机合成研究所研制的一种新型MC尼龙催化剂DILAKTAMAT原理。该催化剂是由Na、Al和CH_3OCH_2CH_2OH在50.66 MPa、100℃下用H_2还原生成的NaAlH_2(OCH_2CH_2OCH_3)_2与己内酰胺反应合成的。采用DILAKTAMAT为主催化剂MDT为助催化剂生产的MC尼龙,在保留其他性能不变的条件下,具有较高的冲击强度,由一般MC尼龙的6.9kJ/m~2提高到30.5kJ/m~2。该MC尼龙主要用于铁路系统站区内信号绝缘用道夹板,以取代原有的钢制鱼尾板。     

Plasma-modified Nylon 4 membrane for dialysis

The effects of plasma treatment conditions, such as supply power, treatment time, gases used in reactor, surface energy, water content, dialysis permeability, partition coefficient, diffusion coefficient, and free volume of Nylon 4 membranes, were studied. The solutes considered for dialysis system were NaCl, urea, and MgCl₂. The permeabilities of NaCl and urea of membranes with plasma treated in argon at 80 W for 20 min are 5.57 × 10^?5 and 5.89 × 10^?5 cm²/min, respectively. Much higher permeabilities of NaCl and urea obtained by oxygen plasma-treated membranes under 20 W and for 20 min are 30.74 × 10^?5 and 17.66 10^?5 cm²/min, respectively, compared to that of untreated Nylon 4 membranes.     

Nylon fiber reinforcement for polyurethane composites

The potential of a nylon 6 fiber was evaluated for composite applications involving rigid polyurethane systems. A study showed that the use of COMPET N, a nylon 6 based fiber surface treated to enhance wetout and adhesion, in an ISP polyurethane system results in composites with higher impact values and lower weight than those reinforced with glass fiber. A 2 percent loading of COMPET N matt increased impact values by more than 300 percent over an unreinforced control while a 3 percent loading of glass matt resulted in increases of less than 100 percent. A drop impact test showed COMPET N fabric reinforced composites to absorb twice as much energy as an unreinforced and glass reinforced composite without major damage. These advantages have also been observed in COMPET N/Glass hybrids, in which layer orientation can be used to produce composites with specific properties. Cut fiber reinforced composites were found to exhibit similar properties as fabric reinforced ones resulting in the commercialization of a canoe end cap containing cut nylon fiber. Additional property benefits such as improved impact fatigue and decreased stress cracking have also been observed in nylon 6 reinforced composites resulting in the consideration of these materials for a wide range of applications.