涤棉混并工艺的优选试验

对涤纶短纤维与棉混纺三道并条工艺中罗拉中心距、后张力牵伸、后区牵伸进行了优选试验,对于混并工艺有了进一步的认识,解决了生产中遇到的台面断条问题,提高了混纺条的条干均匀度,为提高成纱质量打下了基础.     

澳毛粘胶涤纶混纺纱的开发

介绍了在棉纺设备上开发生产澳毛／粘胶／三角形截面异形涤纶20／60／2018．5tex混纺纱的工艺流程和生产技术措施。澳毛／粘胶／三角形截面异形涤纶20／60／2018．5tex采用分别制条，在并条混和的纺纱工艺流程。     

牛奶纤维与棉纤维混纺纱的开发

介绍了牛奶纤维的特性.针对牛奶纤维抱合力差的特点,采用牛奶纤维和撕断的精梳棉条进行棉包混和;在开清棉工序适当加重棉卷的定量;梳棉工序为减少棉条断头,生条定量偏重控制;粗纱的捻系数偏大掌握,使用橡胶假捻器,提高加捻效率,采用较小的粗纱张力;为了与较大的粗纱捻系数相配合,细纱后区工艺采用大隔距、较小的后区牵伸倍数,前区采用小隔距,可适应牛奶纤维与棉纤维混纺纱的质量.     

多功能负氧离子纤维纱的开发

介绍了多功能负氧离子纤维的性能特点,结合生产实践,通过工艺试验,分析了纤维性能,纺纱工艺参数对多功能负氧离子纤维纯纺和混纺纱质量的影响,探讨了提高成纱质量的技术措施.     

提高CJ 14.5 tex成纱质量的体会

根据CJ 14.5 tex成纱质量要求和原成纱质量不高的问题,介绍了纺纱过程中各工序采取的工艺技术措施和工艺配置.通过合理配置纺纱工艺参数,并采取了相应的技术措施,其成纱质量明显提高.     

提高喷气织机效率的途径

在ZAX-e 190型电子多臂喷气织机上织造细号高密纯棉精梳织物时,喷气织机织造效率不高的原因主要是纬停次数多、经停次数多以及挡车工处理停台的速度低.为此,采取相应的技术措施,达到了提高喷气织机织造效率的目的.     

玉米纤维与彩色棉纤维混纺纱的开发

分析了玉米纤维与棕棉纤维的特性,玉米纤维与棕棉纤维混纺纱采用两种纤维分别制条再混和纺纱的工艺流程.玉米纤维的长度整齐度好、含杂少、回潮率低,开清棉工序采用"勤抓少抓、多松少打、轻梳少落"的工艺原则.     

C 14.5 tex纱纺纱实践

C 14.5 tex纱配棉品级较差,纺纱各工序通过采取相应的工艺技术措施,在TFA506型细纱机上通过合理配置工艺参数、选用新型专件器材,保证了成纱质量的稳定提高.     

天然高聚物的静电纺丝技术及应用

天然高聚物具有良好的生物相容性、生物降解性和人体亲和性,用其静电纺得的制品可广泛应用于生物医学、防护服装、内衣和农业等许多领域。文章主要介绍了天然高聚物的静电纺丝工艺以及日前静电纺天然高聚物的应用情况,并对其未来的发展趋势进行了展望。     

How to accelerate green technology diffusion? Directed technological change in the presence of coevolving absorptive capacity

The time window for effective climate change mitigation is closing. Technological change needs to be accelerated to limit global warming to a manageable level. Path dependence of technological change is one explanation for sluggish diffusion of green technologies. Firms acquire capital that differs by technology type and build up type-specific technological know-how needed to use capital efficiently. Path dependence emerges from cumulative knowledge stocks manifested in the productivity of supplied capital and firms’ capabilities. Increasing returns arise from induced innovation feedbacks and learning by doing. Relatively lower endowments with technological knowledge are a barrier to diffusion for new technologies. This paper shows how the evolution of relative stocks of technological knowledge explains different shapes of diffusion curves. Using an eco-technology extension of the macroeconomic agent-based model Eurace@unibi, it is shown how the effectiveness of different climate policies depends on the type and strength of diffusion barriers. Environmental taxes can outweigh lower productivity and subsidies perform better if lacking capabilities hinder firms to adopt a sufficiently mature technology.