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《国际纺织导报》2018,(9)
选用6种线密度不同的仪纶纤维,测试纤维长度、卷曲率、回潮率、断裂强度和断裂伸长率,及其对应的环锭纺、紧密纺纱线的断裂强度、断裂伸长率、捻度、毛羽指数、条干均匀度等性能,制备纬平针织物试样,分别采用圆轨迹法、马丁代尔法、起球箱法等等级评价方法,以及描述法、计数法等综合评价方法,评价仪纶针织物的抗起毛起球性能。试验结果显示:仪纶纤维的回潮率为0.8%,仪纶纤维线密度对纱线性能无显著影响;环锭纺仪纶纱线的毛羽指数、条干不匀大于紧密纺仪纶纱线,断裂强度及动摩擦因数小于紧密纺仪纶纱线;仪纶纤维线密度差异对环锭纺纬平针织物的抗起毛起球性能未产生显著影响;圆轨迹法和马丁代尔法的测试结果基本一致,起球箱法测定的织物抗起毛起球性能等级优于圆轨迹法和马丁代尔法,其评价等级可高出0.5~1.0级。 相似文献
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为更好地了解新型内衣针织面料的服用性能,通过测试织物的悬垂性、耐磨性、透气性、透湿性、保暖性和毛细效应,对相近规格的棉、棉/氨纶、莫代尔/氨纶、珍珠纤维/氨纶、甲壳素/丽赛/氨纶和棉/莫代尔/氨纶针织内衣面料的服用性能进行了对比分析.结果表明:莫代尔、珍珠纤维和甲壳素纤维及其混纺织物的综合服用性能优于棉织物,适合作内衣面料. 相似文献
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采用不同方法对维纶基大豆纤维与维纶进行了鉴别,并对两者的物理性能和化学性能进行了测试与分析.结果表明:用燃烧鉴别法、显微镜现察法、化学溶解法、药品着色法和红外吸收光谱法都能鉴别区分维纶基大豆纤维与维纶;维纶基大豆纤维的干、湿态初始模量和断裂强度小于维纶,而其干、湿态断裂伸长率均大于维纶;在纤维与纤维静摩擦中,维纶基大豆... 相似文献
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利用衰减全反射傅里叶红外光谱(FTIR-ATR)技术对几种常见的产业用纤维——乙纶、丙纶、锦纶、涤纶、芳纶1313、芳纶1414、聚四氟乙烯纤维等进行测试,通过提取各纤维红外谱图的特征峰及特征谱带,实现从化学结构上对几种常见产业用纤维的定性鉴别。FTIR-ATR技术采用点对点采样,所需样品量少,可实现无损检测,且检测周期短、测试灵敏度高、结果准确可靠。 相似文献
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采用燃烧法、显微镜观察法、溶解法、红外光谱法以及差示扫描量热法(DSC)等检测手段对聚乙烯/聚酰胺复合纤维的各项性能进行测试。试验结果表明:聚乙烯/聚酰胺复合纤维为皮芯结构;其燃烧特征、溶解特征体现为乙纶和锦纶的复合特征;在红外光谱测试和DSC测试中,聚乙烯/聚酰胺复合纤维均与单组分乙纶、锦纶有明显区别,且复合了两种单组分纤维红外特性和热性能特征。综合以上方法,可实现对聚乙烯/聚酰胺复合纤维的准确鉴别。 相似文献
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A modified cell fragility method is described for estimating the deterioration which occurs during the storage of frozen fish. A sample of only 100 mg is needed and this is homogenised in a medium consisting of 2% trichloroacetic acid in 1.2% formaldehyde. The results obtained by the new modification are almost unaffected by the pH of the fish, so can give a more truthful estimate of the time-temperature history than those of the original method. Experimental points on optical density/time curves obtained by the new modification show less scatter than those by the original method. Values decrease during storage rather more rapidly than by the original method, to an asymptote which is lower. Modified cell fragility values do not correlate with the length of the fish or its water content. It appears that the escape of myofilaments from the fibrils of high-pH cod accounted for the drop in optical density (scattering) seen in the original method, while in the modified method such proteinaceous material is precipitated and contributes to the optical density of the homogenate. Good curves of optical density/storage time were obtained with other non-fatty fish species, but fatty fish were not satisfactory. Advanced bacterial spoilage of the fish before freezing reduces the optical density in both methods. 相似文献
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周苏萌;焦表保;王府梅;戴志强 《纺织学报》2009,30(2):42-47
针对无缝针织产品常用经验法设计,具有盲目试探性,费时费力的问题,通过对无缝针织物的密度和面密度等结构参数和成品服装尺寸的测试,分析影响织物结构和成衣尺寸的主要因素,包括原料种类、成品面密度、组织结构和织机型号.发现在相同的织物组织和加工工艺下,原料的下机回缩率和成品面密度决定了无缝针织产品织物的紧密度,成衣尺寸则由织物的组织结构、紧密度和织机型号决定。同时研究了结构参数与成衣尺寸之间的定量对应关系,实现了基于原料种类、织物面密度、组织结构和织机型号的无缝针织服装面料结构参数与成品尺寸的预测。 相似文献
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A new method for the determination of the hydrated density of starch granules is presented. The method is based on dilution of a high molecular weight dye. Both mechanical damage and increased temperature lower the hydrated density. Treatment with toluene-acetone and dry heating had significant effects on the density of damaged but not on intact granules. The method should have wide application to other biological materials and solvent systems. 相似文献
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A simple and new method was developed for monitoring the dynamic density of dough during fermentation process. In this method digital imaging was applied to determine volume of dough sample in actual proofing conditions, i.e., temperature and relative humidity of the fermentation oven. The method resulted that the volume increasing profile affected by temperature and relative humidity conditions of the fermentation oven. As when temperature and relative humidity was increased, volume expansion rate was higher. The data also demonstrated that dough density decrease with the investigated proofing temperatures of 25, 30 and 35 °C more significantly (p < 0.01) than proofing relative humidity of 65%, 75% and 85% (p < 0.05). The new imaging method have the advantage of being low cost and measuring dough density in actual proofing conditions as used in bread making. 相似文献
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An essential criterion of the surface quality of particleboards is the surface irregularity caused by different swelling and shrinking behaviour, depending on structural composition and inhomogeneity. A new measuring method was developed to study the influence of wood density and particle dimensions on short wave particle markings. Also the effects of inhomogeneities of wood density, of resin content and particle dimensions on short and long wave irregularities of the surface were investigated. 相似文献
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木材复式弯曲成形方法分析 总被引:1,自引:0,他引:1
在分析以前木材复式弯曲成形方法的基础上,提出了木材数控复式弯曲方法,解决了小曲率和无固定旋转中心弯曲构件的弯曲成形问题,并分析了复式弯曲方式对木材密度等方面的影响,在利用钢带弯曲的基础上完善了木材弯曲工艺,为家具和门窗上应用的复杂曲线形状弯曲构件提供新的加工方法,对于木材加工企业新的木质弯曲件产品开发利用提供了新的思路和解决方案。 相似文献
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通过对Y2005型多臂小样织机的改造以满足开发新型毛巾面料的实验需要,变化组织、经纬密比、纱线支数、织物原料及毛圈高度等参数试织了两种毛巾织物,并用语意评定法测评了织物手感风格。 相似文献
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纤维集合体的透气性不仅取决于纤维性状,更依赖于集合体的填充密度.文章针对纤维集合体不同密度条件下透气性能测量领域的空白,提出测量集合体透气性的新方法,并对不同种类及排列的纤维集合体进行了透气性能对比与分析,实验证明:由于不同的纤维具有不同的形态结构特征,从而造成各种纤维集合体间具有不同的透气性能,并且受纤维排列形式的影响;气流流过集合体时不仅与空隙的多少有关,而且与空隙的形状、曲折程度、排列和孔径的分布有关. 相似文献