首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 640 毫秒
1.
从麻织物风格及其吸水性能的要求出发,探讨利用涤纶中空纤维设计纱线号数、混纺比,捻度的方法、提出当设计纱号为32s、混纺比80/20,设计捻度100.763捻/10cm时纺制的纱线可较好地体现中空涤纶纤维吸水性能好的特点。  相似文献   

2.
优良的涤纶化纤仿毛织物除应具有羊毛织物的外观及手感外,还应具有与羊毛织物相似的的舒适性.本文将涤纶化纤仿毛织物与羊毛织物的舒适性能的差异进行了比较.通过主成份分析.探讨影响两者舒适性能差异的主要因素,同时利用欧氏空间距离概念,建立评价涤纶化纤仿毛织物舒适性的客观性指标.  相似文献   

3.
本文综述了国内外麻织物印染后整理的发展动态。指出了麻织物高级整理的关键工艺是树脂整理、丝光及柔软处理,并概括了麻织物树脂整理、丝光和柔软处理的现状及其发展.  相似文献   

4.
涤纶仿毛织物除应具有羊毛织物的外观及手感外,还应具有羊毛织物优良的保暖性及温暖感。本文就影响织物保暖性的热阻进行了测试及分析,并探讨了涤纶仿毛织物结构因素与织物热阻的关系。  相似文献   

5.
选取了五种不同种类的芒麻织物,在介绍麻织物风格特征的基础上,采用秩位法对织物风格进行了感官评定,并利用数理统计中的秩位一致性系数对评定结果进行了检验。感官检验方便实用,多用于业务检验场所,有其局限性。目前国内外都在尝试采用仪器代替感观评定织物风格,其方法是利用仪器测试出织物应变力学量,然后进行转换性评价。经分析可知,风格的转换性评价属于一个灰色系统评价问题。用国产YG821织物风格仪对五种试样测定其八项独立的力学指标,利用灰色关联度的评价方法进行了评定,经计算其优劣秩位与感官评定相一致。从织物的评价结果,可分析出体现主麻织物风格的影响因素,对化纤仿麻织物的设计思路具有启示作用。利用国产风格仪对芒麻织物风格进行灰色关联度的评定,定量准确,具有广泛的实用性。  相似文献   

6.
在有少量水存在情况下,将数均分子量(Mn)分别为1000和4000的聚氧乙烯二胺(PEO胺)与等克分子的己二酸成盐后,再与己内酰胺共聚制得PA6-PEO胺嵌段共聚物。该嵌段共聚物按PEO胺0.03和0.04(质量分数)配比分别与涤纶(PET)切片共混,进行熔融纺丝及拉伸。研究发现,由Mn=1000的PEO胺制得的PA6-PEO胺嵌段共聚物中低聚物含量较少,分子量分布窄,与涤纶切片共混后具有良好的可纺性和拉伸性能;而PEO胺Mn=4000的共混纤维可纺性、可拉伸性都差。共混纤维断裂强度较纯涤纶有所下降,而吸湿性得到明显提高,具有良好的抗静电性和耐洗涤性。共混纤维分散兰染料上染率较纯涤纶提高两倍,同时具有酸性染料可染性  相似文献   

7.
将PET与共聚酯共混纺制中空共混纤维,经碱处理后形成多孔的高吸水涤纶。本文通过X—射线衍射仪,分光光度计,扫描电镜和热收缩仪等测试对高吸水涤纶纤维和共混纤维的结构和染色性进行了研究,目的在于探索高吸水涤纶染色机理。研究结果发现高吸水涤纶纤维与共混纤维相比较,不仅具有许多微孔,而且结晶度高,晶粒尺寸大,单位非晶体积大,非晶区结构紧密;高吸水涤纶的上染量与保水率呈指数关系。由此推论高吸水涤纶上染量高主要是由于纤维中微孔的吸附染料作用。  相似文献   

8.
纳米ZnO对涤纶织物抗紫外线整理   总被引:1,自引:0,他引:1  
应用钛酸酯偶联剂对ZnO纳米粉进行了表面改性,使用改性后的纳米ZnO处理涤纶织物,测试了涤纶织物的紫外线透过性能及对亚甲基蓝的光催化能力,借助SEM、DSC和FT-IR等测试手段,对ZnO纳米粉和涤纶纤维与偶联剂的结合性能进行了表征与分析。试验结果表明,在偶联剂作用下,涤纶织物经纳米粉处理,抗紫外线能力得到增强,ZnO纳米粉为薄片状结构,主要分布在涤纶纤维之间,偶联剂与纳米粉发生了偶联结合,而纳米粉通过偶联剂以物理吸附方式附着在涤纶纤维表面。  相似文献   

9.
张瑞军 《科技信息》2012,(12):345-345
分形涤纶是我国自主研制开发的新型合成纤维,它的结构中具有潜在的扭转基因,这种扭转基因使纤维的外部形态具有近似天然纤维的卷曲,既具有仿天然的外观质感,又保持了涤纶纤维本身强度高、弹性好等优点。改善了普通纤维排汗、透气性差,穿着闷热的缺点。1.分形涤纶/棉混纺织物的设计本文开发的分形涤纶/棉混纺织物可用于男女衬衣面料,这就要求织物外观挺括,透气、透湿性能良好,  相似文献   

10.
本文从三种共混体系的选配、抗静电剂含量和共混方式对涤纶纤维可纺性、抗静电性及耐水洗性的影响中,发现涤纶(PET)—聚乙二醇(PEG)—十二烷基苯磺酸钠(SDBS)—硬脂酸盐(Stearate)四元共混体系,因复合抗静电剂的协同效应,使其抗静电性和耐久性好。该体系在40℃的皂水中连续洗涤20次,体积比电阻达10~8~10~9Ω·cm,且可纺性和拉伸性能均佳。本文还探讨了抗静电剂含量对涤纶纤维力学性能的影响。  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

15.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

16.
以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.  相似文献   

17.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

18.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

19.
Quality traits in wheat (Triticum aestirum L.) were studied by quantitative trait locus (QTL) analysis in a recombinant inbred line (RIL) population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross (ChSh). Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.  相似文献   

20.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号