聚酰胺纤维芳纶1414包覆纱的拉伸性能探讨

探讨聚酰胺纤维芳纶1414包覆纱的制备方法及拉伸断裂强力性能。以聚酰胺纤维为外包纱、芳纶1414为芯纱制备聚酰胺纤维芳纶1414双向包覆纱,测试聚酰胺纤维芳纶1414包覆纱的拉伸断裂强力,研究导纱钩与空心锭距离、捻度对包覆纱拉伸断裂强力的影响规律。结果表明:导纱钩与空心锭距离在7.5 cm～15.5 cm范围内,聚酰胺纤维芳纶1414包覆纱的断裂强力呈现先增加后减小的规律,且导纱钩与空心锭距离为10.5 cm时包覆纱断裂强力最大;随着包覆纱捻度的增加,聚酰胺纤维芳纶1414包覆纱的断裂强力呈现先增加后减小的规律,且捻度为(400/320)捻/m时包覆纱断裂强力最大。认为:合理的工艺设计可有效提高包覆纱拉伸断裂强力。     

锦纶／氨纶包覆纱拉伸性能与包覆度的关系

选取一定规格的锦纶丝、氨纶丝在包覆丝机上纺制一系列不同包覆度的锦纶／氨纶包覆纱，并对成纱性能进行了拉伸实验分析，得到了包覆纱断裂强力、断裂伸长率与包覆度之间的相应规律。     

特种玄武岩缝纫线的制备工艺及其性能

为制备具有高强、高模、耐化学腐蚀以及抗原子氧等性能的玄武岩高性能缝纫线，利用空心锭包覆纺纱机构，选用聚酰胺长丝为外包覆纱，对双股无捻玄武岩长丝进行双向包覆，研究不同捻度、不同线密度外包覆纱对其拉伸断裂强力及耐磨性能的影响，并分析了包覆纱断裂形貌。结果表明：所纺制的包覆纱强力相较芯丝均有提高，断裂强力提升23%～29%;在一定捻度变化区间内，捻度的增加会使包覆纱断裂强力呈现先升高后降低的趋势，使耐磨程度呈现先减弱后增强的趋势，且在650捻/m时断裂强力最高；不同线密度外包覆纱对芯纱有不同的赋强作用，线密度越大成纱强力越高；芯纱拉伸断裂形态通常为2种，即在表面包覆间距处出现不同程度凸起或呈原纤化劈裂。     

锦纶粘胶粗纱包覆纱的纺制以及纱线性能分析

为了探讨锦纶粘胶粗纱包覆纱的纺制工艺和包覆纱性能特点,主要对锦纶粘胶粗纱包覆纱纺制方法进行了探讨,并对成纱性能进行了测试和分析.包覆纱的断裂强力在一定范围内是随包覆度增加而增加的,但当包覆度达到一定程度时成纱强力就明显开始下降.     

锦/氨纶包覆纱拉伸力学性能与包覆度的研究

一定规格的锦纶丝、莱卡丝在空心锭子纺纱机上纺制了一系列不同包覆度的锦纶 /氨纶包覆纱 ,并对成纱性能进行了拉伸实验分析 ,得到了包覆纱断裂强力、断裂伸长率与包覆度间的相应规律。     

锦纶6预取向丝拉伸假捻变形成型工艺研究

研究了锦纶6预取向丝拉伸假捻变形生产锦纶6变形丝(DTY)的成型工艺,探讨了不同线密度规格锦纶6预取向丝拉伸假捻变形加工速度、拉伸倍数、D/Y比和拉伸假捻变形温度的主要工艺参数。实验表明:当锦纶6预取向丝线密度规格为1.53~2.00之间,加工速度700~800m/min,拉伸假捻变形温度为167~179℃,拉伸倍数为1.25~1.30,拉伸假捻D/Y比选择在1.75~1.80较为合理,其拉伸假捻变形生产锦纶6拉伸假捻变形丝质量较好,具有取向结晶化结构和均匀形态的变形效果,符合后续用于生产拉伸变形包覆工艺及性能的要求。     

涤纶氨纶包覆纱性能测试与分析

研究涤纶氨纶包覆纱的性能.介绍了包覆纺纱机构并对外包涤纶长丝细度不同的7种涤纶氨纶包覆纱进行了拉伸和沸水收缩试验.结果表明:随外包涤纶长丝细度的增加,涤纶氨纶包覆纱的断裂强力逐渐增大,但是增大幅度却逐渐下降;断裂伸长率基本稳定;沸水收缩率先稳定而后出现减小趋势.     

锦纶莱卡包覆纱拉伸性能与包覆度的关系

用一定规格的锦纶丝、莱卡长丝在空心锭纺纱机上纺制了一系列不同包覆度的锦纶莱卡包覆纱,并对其成纱性能进行了拉伸试验分析,得到了包覆纱断裂强力、断裂伸长率与包覆度之间的相应规律.     

纬编间隔床品面料的结构及性能分析

采用3.3 tex涤纶单丝为间隔纱,8.3 tex涤纶和2.2 tex氨纶交织为表层,制备4种不同密度、厚度及间隔纱连接方式的纬编间隔织物。分析织物组织结构和编织工艺,并测试力学性能和热湿舒适性能,分析面料厚度、密度与各项性能关系,用数学模糊分析法对面料进行综合分析。结果表明,间隔纱连接方式对面料拉伸断裂性和顶破性有一定影响,对透气透湿性无明显影响;厚度、密度较小且间隔纱交叉连接的织物综合性能最好;选择床垫面料时考虑厚度、密度及间隔纱连接方式对面料性能影响。     

亚麻/聚丙烯织物的经纬密度对其增强热塑性复合材料性能的影响

以亚麻纱线作为芯纱,PP长丝作为外包纱,利用花式捻线机纺成聚丙烯纤维/亚麻包覆纱,再织成平纹机织布,最后热压成复合材料层板。板材拉伸性能测试结果表明,随着纬纱密度的增大,经向的拉伸强度和拉伸弹性模量随之减小,而纬向的随之增大;随着经纱密度的增大,经向的拉伸强度和拉伸弹性模量也随之增大,而纬向的却随之减小。     

快时尚针织面料用混纺纱的设计与分析

根据目前快时尚服装面料的用纱需求,通过测试分析黏胶纤维、腈纶的物理力学性能,选取0.10、0.13和0.17 tex 3种不同线密度的纤维,与锦纶和PBT长丝进行配伍混纺,在相同的纺纱工艺条件下,设计试纺6种相同规格的混纺包芯纱,测试分析最终成纱的强伸度、毛羽指数和条干均匀度.结果表明:不同线密度的黏胶纤维、腈纶与锦纶...     

捻度对锦纶/棉混纺纱质量指标的影响

为进一步提升锦纶/棉混纺纱质量,针对捻度与锦纶/棉混纺纱质量指标的关系问题进行了分析。在其它工艺相同的条件下调整细纱工序捻度的设置,纺制了16种锦纶/棉混纺纱,对其质量指标进行测试,并通过SPSS软件对捻度与混纺纱质量指标之间的关系进行拟合与回归分析,建立了混纺纱质量指标随捻度变化的回归预测模型。结果表明,捻度与锦纶/棉混纺纱强伸性能、粗细节和毛羽指标显著相关,测试组数据与预测值间残差绝对值均在3倍残差标准差以内,验证了模型的有效性。捻度大小直接影响锦纶/棉混纺纱的强伸性能、粗细节和毛羽指标,预测模型反映了捻度对混纺纱强伸性能、粗细节和毛羽指标影响的数量相关关系,为锦纶/棉混纺纱生产中捻度设计和快速调整提供了参考依据。     

氨纶与双组分复合长丝/棉包芯纱的拉伸弹性

为改善传统弹力包芯纱弹性回复性能,以氨纶、双组分复合长丝(CM800)为芯纱,棉纤维为外包纤维,设计了13种弹力包芯纱。探讨氨纶预牵伸倍数、芯纱线密度和弹力包芯纱反复拉伸次数与弹性回复率之间的关系。采用纱线强伸仪测试氨纶/棉、CM800/棉和棉双丝弹力包芯纱的拉伸弹性。结果表明:氨纶的牵伸倍数越大,弹力包芯纱的弹性回复率越小;随着氨纶线密度的增加,包芯纱的弹性回复率先增加后减少;CM800线密度越小,包芯纱的弹性回复率越小;氨纶/棉、CM800/棉和棉双丝弹力包芯纱的定伸长5%和定负荷200 c N反复拉伸次数与纱线弹性回复率的关系均符合幂函数关系,且弹力包芯纱的弹性回复率随着纱线反复拉伸次数的增加而降低;CM800/棉包芯纱的弹性回复率最大,氨纶/棉包芯纱的弹性回复率最小。     

Graphene and graphene oxide-coated polyamide monofilament yarns for fiber-shaped flexible electrodes

In this study, polyamide monofilament yarn of 3000 tex was coated with graphene oxide (GO) nanomaterial using dip-coating method. The graphene oxide layer was then reduced with green chemical reduction method, resulting in a reduced graphene oxide-coated monofilament yarn. The properties of the graphene oxide and reduced graphene oxide-coated polyamide monofilament yarns were characterized by performing physical, electrical, optical, and morphological investigations. The lowest sheet resistance was measured from seven-layer graphene-coated polyamide monofilament yarn as 3.09 kΩ/sq. Moreover, it was measured that 90° and 180° bent seven-layer graphene-coated polyamide monofilament yarns had 3.57 and 3.81 kΩ/sq sheet resistance, respectively. Additionally, while PA monofilament yarn has 73.5% transmittance at 550 nm; seven-layer GO and seven-layer graphene have 18.8 and 4.5%, respectively, as expected. On the other hand, the contact angle increased with the reduction of graphene oxide layer on monofilament yarn. The fabricated graphene-coated polyamide monofilament yarns can be used in electrotextiles, solar cells, sensors, and OLEDs as fiber-shaped flexible electrodes.     

回潮率对石英纤维纱织造前后力学性能的影响

为研究导致石英纤维纱使用过程中强度下降的主要因素,对石英纤维纵、横截面及形貌进行表征,测试不同回潮率、不同线密度石英纤维纱织造前后拉伸断裂强度,分析织造过程中整经、开口、打纬等对其力学性能的影响,并探究浸润剂对石英纤维纱力学性能的影响。结果表明:石英纤维纱的拉伸断裂强度随回潮率增加而显著下降,其中95 tex石英纤维纱当回潮率为100%时比0%时拉伸强度降幅最大可达41%;95 tex石英纤维纱在1.0%回潮率织造后,其纤维拉伸强度下降高达60.94%;添加浸润剂对纤维纱强度有明显增强效果,390 tex石英纤维纱添加体积分数为100%浸润剂时,纱线强度增加17%;二氧化硅吸湿及浸润剂吸湿是导致石英纤维纱强度下降的主要原因。     

集聚区牵伸倍数对紧密纱综合性能的影响

探讨紧密纺集聚区牵伸倍数对不同线密度紧密纱综合性能的影响.通过改变牵伸胶辊、输出胶辊直径的大小,来改变集聚区的牵伸倍数,然后纺制不同线密度的精梳紧密纱,测试其成纱性能.结果表明:当集聚区牵伸倍数为1.07倍时,CJ 27.8 tex和CJ 18.2 tex纱的综合性能较好;当集聚区牵伸倍数为1.05倍时,CJ 9.7 tex和CJ 7.3 tex纱的综合性能较好.     

Spinning and properly lesl of uiimwpe composite yarn北大核心CSCD

UHMWPE fiber has high specific strength and specific modulus, hut poor moisture absorption.In the paper, with viscose staple fiber as the outer fiber, and UHMWFE staple fiber yarn( 14.75 tex) and filament( 16.67 tex) as the core yarn, 34 tex core-spun yarn was spun.With viscose staple fiber as the intermediate fiber, and UHMWPE staple fiber yarn ( 14.75 tex) and filainent( 16.67 tex) as wrapping fiber, 34 tex Sirofil yarn was spun.The performance of Sirofil yarn was optimized by changing the spacing between the UHMWPE staple fiber yarn or filament and the fiber strand.The results showed that for yams with the same linear density, except for elongation at break, core-spun yams and Sirofil yams with UHMWFE filament as the core yam or wrapping fiber were better than core-spun yams and Sirofil yarns with UHMWFE staple fiber yarn as the (tore yarn or wrapping fiber in strength, evenness and hairiness.When Sirofil yams are spun, the spacing between the UHMWPE staple fiber yarn and fiber strand is preferably 8 mm, and the spacing between the UHMWPE filament and fiber strand is preferably 6 mm. © 2021 China Silk Association. All rights reserved.     

Studies of the hybrid effect in mechanical properties of tencel blended ring-, rotor- and air-jet spun yarns

This paper presents a study of hybrid effect on mechanical properties of tencel blended ring-, rotor- and Murata jet spinning yarns. The tensile strength, breaking elongation, flexural rigidity and abrasion resistance of tencel-polyester and tencel-cotton blended yarns are examined and compared with the value predicted using linear and quadratic rule of mixture (ROM). It is observed that there is no significant hybrid effect on abrasion resistance of tencel-polyester mix yarns and tenacity and breaking extension of tencel-cotton mix yarns; hence, a linear ROM is found better in predicting the yarn properties. Further, for all yarn types, there is a significant hybrid effect on tenacity, breaking extension and flexural rigidity of tencel-polyester mixes and flexural rigidity and abrasion resistance of tencel-cotton mixes. A quadratic ROM model suits well for these yarns. Overall, it is found that there is a negative hybrid effect on tenacity and breaking extension whereas there is a positive hybrid effect on flexural rigidity for all the yarn samples irrespective of fibre and yarn type. The abrasion resistance has a mixed trend. Further, tencel-polyester yarns yield more satisfactory results than the tencel-cotton yarns in terms of strength and breaking extension but behave poorly during abrasion test for 200 cycles. Increasing tencel content both in tencel-polyester and tencel-cotton fibre-mix produces a rigid yarn with reduced abrasion resistance.     

黄麻混织针织物的设计与开发

本研究针对黄麻纱线粗硬、毛羽较多,弹性低等特点,对纱线毛羽、细度及强度进行测试并选择适合的棉及涤纶纱线进行混合。将黄麻与棉及涤纶纱线经过合股上蜡处理后,在针织横机上设计并编织罗纹、移圈、圆筒等不同组织和结构的黄麻混织织物及产品。通过对黄麻混织织物的耐磨性、透气性、抗起毛起球等性能进行测试与分析,结果表明麻涤1罗纹织物耐磨性、耐起毛起球性最好,而麻棉4为单面圆筒织物线圈密度最小,透气性能最优;麻棉2由于具有移圈及凹凸效果,透气性能次之,耐磨性稍差。所织织物适合制作具有田园风格的家居类装饰物,从而开发黄麻纤维更广泛的应用领域。     

聚酯长丝/棉复合纱斜纹织物的保形性及服用性能

为研究聚酯(PET)长丝/棉复合纱斜纹织物的保形性及服用性能,利用PET长丝与纯棉纱开发了3种线密度为9.8 tex的纱线,并以二上二下斜纹组织织造了4种织物。对织物进行了折皱回复性、免烫性、尺寸稳定性、悬垂性等保形性能,强伸性、拉伸弹性、顶破性等抗变形性测试,以及手感风格、透湿性、透气性等服用性能测试。对比分析了纯棉纱织物与复合纱织物的保形性与服用性能。结果表明:PET长丝/棉复合纱可改善纯棉织物的折皱回复性、悬垂性,提高免烫等级,同时又不影响织物的服用性能;包芯纱织物比包缠纱织物有更好的保形性,更高的免烫等级,是免烫衬衫面料的理想选择。