利用丙纶设备纺制锦纶三维卷曲短纤的工艺探讨

探讨了利用丙纶短程纺设备纺制锦纶三维卷曲短纤的工艺条件。结果表明,只要合理设定工艺参数,慎重选择适宜的喷丝板,采用较高挤出量,可以在现有丙纶设备上生产品质稳定的锦纶三维卷曲短纤。对进一步开发锦纶BCF提供了间接经验。     

聚丙烯纤维的开发与应用情况

20世纪末以来，聚丙烯纤维工业迅猛发展，新产品不断出现，应用范围日益广泛。纺丝工艺也由一般的常规纺丝（1．0～2．0km／min）、中速纺（2．0～3．0km／mjn）发展到高速纺（3．0～4．5km／min）和超高速纺（6．0～12．0km／min）。细旦、超细旦丝和超细无纺布新品种的出现，使PP纤维的应用越来越广。除了生产的无纺布用作工业用布、过滤材料、土工布、农业用布、覆盖材料之外，医用材料、卫生材料、一次性材料等方面也大量使用PP纤维。     

超细钢-聚丙烯混杂纤维混凝土力学性能研究

为研究超细钢-聚丙烯纤维对混凝土力学性能的影响,进行了9组超细钢-聚丙烯混杂纤维混凝土试件的立方体抗压强度和劈裂强度试验,分析了超细钢纤维、聚丙烯纤维体积掺量对混凝土力学性能的影响。结果表明:混杂纤维的掺入使混凝土的立方体抗压强度、劈裂强度及拉压比均有提高,混杂纤维混凝土破坏产生明显延性特征;超细钢纤维体积掺量对混凝土力学性能的影响最大,混凝土强度及拉压比随超细钢纤维掺量增加而增大;聚丙烯纤维体积掺量增加对混凝土力学性能的影响并非线性提高,混掺0.1%聚丙烯纤维和1.5%超细钢纤维的混凝土获得最佳力学性能,抗压强度提高19.42%,劈裂抗拉强度提高56.78%,拉压比提高30.16%。     

聚丙烯纤维产品的新进展

间述聚丙烯纤维产品的新进展，介绍了近几年来新型超细聚丙烯短程纤维，高强高模量聚丙烯纤维及新型多聚丙烯纤维的开发与应用，预计了在２１世纪，聚丙烯纤维的应用会得到更大的发展。     

聚烯烃纤维

20124105塑料级聚丙烯的熔纺Gregor Svetec Diana;Actachimica Slovenica,2009,5(64),p.959(英)研究的目标在于优化塑料级聚丙烯长丝的熔纺,并对来自塑料级和纤维级聚合物获取的初生纤维长丝的结构特征进行比较。聚丙烯长丝在Extrasion Systems Ltd实验室的纺丝拉伸装置上进行。优化纺     

差别化纤维

20125202多头纺生产的超细纤维Markus Reichwein…;International Fiber Journal,2012,26(2),p.36(英)超细纤维工业化生产已有40年历史,但获得高价值的特殊用途也只有20多年,而在各个领域都得到应用只是近15年时间。另外,超细纤维在聚酯DTY中所占的份额总共为20%多点。文章中简述了超细纤维和超微细纤维的定义以及在常规纺丝装置上采用双组分纺丝工艺生产小于0.0001dpf的长丝,文章中对多头纺生产超细长丝的纺丝装置、冷却吹风单元的工艺和参数作了详细描述。对POY生产中的能源节约方案也作了介绍。     

熔体直纺多孔超细涤纶POY纺丝成形工艺研究

研究了熔体直纺多孔超细涤纶POY的成形加工条件。重点探讨了直纺熔体品质、纺丝温度、冷却成形条件和卷绕速度对多孔超细涤纶POY纺丝成形过程中的流变性、可纺性和结构性能以及纤维品质的影响。     

聚丙烯细旦与超细旦纤维纺前染色新方法

聚丙烯细旦与超细旦纤维纺前染色新方法由于聚丙烯的非极性结构，它不能与极性染料结合，因此通常认为它不可染色。普通聚丙烯纤维及其织物不能进行印染后整理，它们大都是通过着色，即纺前染色而获得颜色的。应用这种方法虽然也能获得有颜色的纤维，但它只适合大批量的生...     

细旦超细旦纤维的制备研究

介绍了国内外细旦纤维和超细旦纤维的制备方法和发展现状，并对纺制过程中易发生的故障和解决方法作了综述。     

静电纺超细相变纤维的研究进展

相变纤维(PCF)已被广泛研究并用作高性能非织造布和涂料。随着纤维制造技术的发展,静电纺超细PCF已经被开发和研究。综述了静电纺丝技术对超细(亚微米)PCF的研究和发展状况。讨论了使用长链脂肪烃(或石蜡)、聚乙二醇、脂肪酸(及其共晶体)和其它固液相变材料(PCM)作为潜热储存材料的静电纺超细PCF的形态、组成和热性质,为制造具有所需热物理性质的超细PCF提供指导。     

原位增强纤维的成形过程

介绍了液晶高分子(LCP)和聚丙烯共混纺丝过程中液晶相微纤维结构的形成过程。通过共混纺丝,LCP在聚丙烯纤维中形成了具有强化作用的微纤维,从而提高了聚丙烯纤维的综合性能。     

Isotactic polypropylene microfiber prepared by carbon dioxide laser‐heating

An isotactic polypropylene (i‐PP) microfiber was obtained by irradiating a carbon dioxide laser to previously drawn fibers. To prepare the thinner i‐PP microfiber, it is necessary to previously draw original i‐PP fibers under an applied tension of 7.8 MPa at a drawing temperature of 140°C. The drawn fiber was heated under an applied tension of 0.3 MPa using the laser operated at a power density of 39.6 W cm^?2. The thinnest i‐PP microfiber obtained under optimum conditions had a diameter of 1.8 μm and a birefringence of 30 × 10^?3. Its draw ratio estimated from the diameter reached 51,630. It is so far impossible to achieve such a high draw ratio by any drawing. The wide‐angle X‐ray diffraction photograph of the microfiber shows the existence of the oriented crystallites. Laser‐heating allows easier fabrication of microfibers compared with the conventional technology such as the conjugate spinning. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 1534–1539, 2004     

PP/PET共混体系及其合金纤维的研究

用增容剂PP-g-AA增容PP/PET共混体系。研究了增容剂含量、共混物组成、共混时间、共混温度以及螺杆转速对PP/PET相形态的影响。结果表明:增容剂的加入大大改善了PP/PET两相间的相容性,并且增容剂的添加量有一最佳值,为PET质量的50%。随着PET含量的增加,分散相的尺寸有所增加。共混温度和共混时间均有一最佳值。随着螺杆转速的提高,分散相的尺寸减小,分布趋于均一,相容性也得到改善。另外,还制备了PP/PET合金纤维,对其表面处理后以及断面SEM观察均表明分散相PET原位成纤,这些微纤提高了合金纤维的力学性能。测试了合金纤维的力学性能,发现组分比为90/10/5时,合金纤维具有最好的力学性能。     

Structural characterization of polypropylene/poly(lactic acid) bicomponent meltblown

The bicomponent meltblown process offers to associate two polymers in the same fiber generating fibrous media with new properties. In this study, we associate polypropylene (PP) and poly(lactic acid) (PLA), from renewable sources, polymers. The influence of primary air flow rate and the structural properties of the PP/PLA bicomponent meltblown are compared to PP and PLA monocomponent meltblown. The structural properties include fiber morphology and diameter, packing density, permeability, thermal shrinkage and crystallization. The results relate that the PP/PLA bicomponent meltblown fiber diameters are thinner than those of PLA monocomponent. Moreover, it has higher resistance to thermal shrinkage compared to PP monocomponent meltblown. The packing density and permeability are not affected by the association of PP and PLA due to low crimp effect. Two different filament formations of PP/PLA bicomponent meltblown at low and high primary air flow rate have also been observed. Lastly, this study illustrates that PP and PLA association is viable, showing the production of PP/PLA bicomponent microfiber and limited thermal shrinkage at high temperature. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44540.     

PP／PET合金纤维的形态和热性能研究

用聚丙烯接枝丙烯酸(PP-g-AA)作增容剂,制备了PP／PET共混合金纤维。对合金纤维碱处理后的表面以及拉伸断裂后的断面形态进行SEM观察,结果表明分散相PET原位形成微纤。DSC研究结果显示,PET在复合体系中起到了异相成核的作用,使PP的结晶速率加快,同时发现加有增容剂PP-g-AA的结晶性能稍有下降,说明增容剂起到了良好的增容效果。     

涤纶微细旦丝生产装置及工艺

详细介绍生产涤纶微细旦丝装置中各设备型式、特点及相应的纺丝工艺要求，为获得稳态的纺丝过程，针对涤纶微细旦丝的特点，阐述了设备的适用性。     

定岛型海岛短纤维在超纤皮革中的应用

介绍了世界超纤皮革的发展及应用,并就定岛型海岛短纤维在超纤皮革中的应用 所产生的问题作了探讨。     

Isotactic polypropylene microfiber prepared by continuous laser‐thinning method

An isotactic polypropylene (i‐PP) microfiber was continuously produced by using a carbon dioxide (CO₂) laser‐thinning apparatus developed in our laboratory. The CO₂ laser‐thinning apparatus could wind up the obtained microfiber in the range of 100 m min^?1 to 2500 m min^?1. The diameter of the microfiber decreased and its birefringence increased with increasing winding speed. When the microfiber obtained by irradiating the CO₂ laser operated at a power density of 31.8 W cm^?2 to the original fiber supplied at 0.30 m min^?1 was wound at 1,387 m min^?1, the obtained microfiber had a diameter of 3.5 μm and a birefringence of 25 × 10^?3. The draw ratio calculated from the supplying and the winding speeds was 4,623‐fold. The SEM photographs showed that the obtained microfibers had a smooth surface without a surface roughened by a laser‐ablation and were uniform in diameter. The wide‐angle X‐ray diffraction photographs of the microfibers wound at 848 and 1,387 m min^?1 showed the existence of the oriented crystallites. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 27–31, 2006     

Hydro‐entangled bi‐component microfiber nonwovens

This article describes the production of microfiber nonwoven fabrics from segment pie bi‐component fibers using air‐laying and hydro‐entanglement. The bi‐component fibers were split into microfibers during hydro‐entanglement. The microfiber nonwoven fabrics are compared with similar products made from single component fibers. The degree of fiber splitting is found to depend on the jet pressure as well as the fiber position in the web thickness direction. Compared with the nonwovens fabric made from single component fibers, the microfiber nonwoven fabrics have higher tensile strength, lower elongation, higher water absorbency. However, contrary to what was expected, the microfiber nonwovens fabrics have a stiffer handle. This is caused by the increased fiber entanglement and much denser structure for the bi‐component microfiber nonwoven fabrics. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers     

汽车座椅用绒面超纤革的设计与开发

介绍了汽车座椅用绒面超纤革原材料开发、外观及内在结构设计要求、主要生产工艺流程及材料的检验标准,指出了汽车座椅用绒面超纤革的开发与设计的方法和要点。