共查询到17条相似文献,搜索用时 78 毫秒
1.
2.
3.
4.
5.
在PA6工业丝生产装置上,通过对切片输送系统和纺丝部分适当改造,优化生产工艺,可纺制PA66工业丝.结果表明:经设备改造和工艺调整后,生产的1 400dtex/210 f PA66工业丝可纺性好,产品优等品率达98%,纤维物理性能优良,断裂强度8.5 cN/dtex,断裂伸长率19.3%,定负荷伸长率8.5%,干热收缩... 相似文献
6.
7.
采用聚己内酰胺(PA6)预取向丝(POY)为原料,经高弹变形,生产PA6弹力丝(DTY),探讨了变形工艺如拉伸倍数、变形温度等PA6-DTY卷缩性能的影响。结果表明:随拉伸倍数增大,PA6-DTY的卷曲收缩率下降,而卷曲稳定度增加;提高变形温度,纤维的卷曲收缩率和卷曲稳定度均增加;选择9 mm厚的陶瓷摩擦片,可在较低的D/Y比下变形加工,减少生产中的毛丝;选择拉伸倍数1.23~1.24,变形温度205~215℃,D/Y比为1.88,冷却距离及超喂率适中,生产稳定,PA6-DTY卷曲收缩率和卷曲稳定度均在60%以上。 相似文献
8.
介绍了在常规PA6 HOY生产设备上直接纺制微细旦PA6 HOY的生产工艺,分析了纺丝工艺条件、喷丝板设计、卷绕工艺等的影响。结果表明,当纺丝温度262~264℃,喷丝孔长径比2.5∶1,侧吹风温度18℃,油剂质量分数为8%,卷绕速度4 500 m/min时,可生产出单丝线密度约1.0 dtex的微细旦PA6 HOY。 相似文献
9.
对丙纶全拉伸丝(FDY)设备进行改造,并优化生产工艺,生产了PA6中低旦工业丝。结果表明:通过对切片氮气保护、单体抽吸、上油、热辊外套、喷丝板等设备改造,采用相对黏度约2.8的PA6切片,控制纺丝温度(278±5)℃,侧吹风速度(0.35±0.05)m/s,侧吹风温度18℃,相对湿度90%,拉伸倍数4.4,拉伸热辊温度65~190℃,生产467 dtex/70 f PA6工业丝,生产稳定,纤维断裂强度6.72 cN/dtex,断裂伸长率21.63%,完全能够满足用户的要求。 相似文献
10.
PA6纤维生产现状及展望 总被引:1,自引:0,他引:1
综述聚己内酰胺(PA6)纤维及其单体己内酰胺(CPL)的国内外生产、消费现状。分析了国内PA6切片和纤维的应用领域和发展前景,并指出今后应大力开发CPL新技术和高附加值PA6纤维,提高PA6纤维在服用领域的比例。 相似文献
11.
12.
13.
Yongjun Wang Yintao Guo Shuimi Zhong Qisong Lin Feng Gao Wenxing Chen Wangyang Lu 《应用聚合物科学杂志》2024,141(13):e55150
The preparation process from waste fibers to regenerated fibers is an environmental significance work. In this work, liquid chromatography/time-of-flight mass spectrometry, advanced polymer chromatography/multi-angle laser-light-scattering/refractive index detector, and two-dimensional wide-angle X-ray diffractometry were employed to characterize the polycaprolactam(PA6) fibers above oligomers composition and content, molecular weight and distribution, crystallization and orientation, and analyzing the changes in mechanical properties. The total content of oligomers in physical and chemical regenerated PA6 fiber is 2.084 wt% and 1.812 wt%, individually, which is higher than that in waste PA6 fiber. And the oligomer content of C1–C4 (cyclic monomer, cyclic dimer, cyclic trimer, and cyclic tetramer) in the regenerated PA6 fiber is higher than that of waste PA6 fiber. The regenerated PA6 fiber sample contains more low-molecular-weight substances, making it easier to form crystal nuclei and crystallize. During the dyeing process of the regenerated PA6 fiber, the γ crystal transformed into α crystal. The tensile strength of physical and chemical regenerated PA6 fiber is lower than that of waste PA6 fiber. And after dyeing, the oligomers content of regenerated PA6 fiber is significantly decreased, especially in C1–C4 oligomer. However, the crystalliniy and orientation of regenerated PA6 fibers were improved, which also leads to the fracture strength increased by about 20% compared to undyed fibers. 相似文献
14.
采用聚合方法制备抗滴落PA6切片,添加阻燃剂共混纺丝得到阻燃抗滴落PA6纤维。用差示扫描量热法、X射线衍射、透射电镜、极限氧指数法等方法对所得产物的热性能、结晶结构、添加剂的分散性能、阻燃性能及力学性能等进行表征。结果表明,抗滴落剂的加入引起了PA6结晶行为的变化,由α晶型转变成α晶型与γ晶型共存;PA6的热稳定性得到了提高;添加剂在聚合物中分散较均匀,阻燃抗滴落PA6纤维的极限氧指数可达26.6%~28.6%,燃烧时产生的熔融滴落物明显减少。阻燃抗滴落PA6纤维的力学性能较PA6约降低10%。 相似文献
15.
Using thermomechanical analysis, the molecular weight distribution and relaxation transitions were investigated in commercial PA6 and in this polymer after passage through an extruder with a static mixer. A diblock or triblock amorphous structure and a crystalline portion in the studied PA6 were found. These amorphous structures differ in the glass transition temperatures by 80–180°C. There was a principal difference in the topological and molecular structures of PA6 depending on the processing conditions—number of cycles and shear rates. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 2361–2368, 2001 相似文献
16.
17.