环锭纺纱和紧密纺纱罗纹针织物性能及其他物理性能

所有数据显示紧密纺纱织物的性能及其他物理参数优于精梳纱织物。相对于传统的环锭纺,紧密纺纱的毛羽指数低、强度高、条干均匀。紧密纺和环锭纺纱线结构上的差异明显地影响其织物性能、因此,尽管所有其他织物参数都相同,紧密纺纱生产的针织物相对于环锭纺纱针织物还是有着较短的线圈长度、较高的面密度、断裂强度、断裂伸长、顸破强力,以及更少的起毛起球。紧密纺纱线生产的针织物仅耐磨性稍差于环锭纺纱针织物．     

罗纹毛针织物等离子体处理后的风格变化

应用辉光放电等离子体对罗纹组织毛针织物进行处理,探讨分析了在不同功率、压强及时间条件下,低温等离子体处理的罗纹组织毛针织物风格的变化。     

一种新的静态测试线圈长度的方法

静态测试纬编针织物的线圈长度对降低成本、提高生产效率是很有必要的。用数字图像处理技术将摄入的图像进行灰度变换、滤波去噪,再用二维傅里叶变换技术提取线圈长度的特征,推导出线圈长度在二维空间与三维空间内的关系转换式,进而求得纬编针织物的线圈长度。这为非破坏性测试线圈长度提供了一种新的方法。     

弹力针织物的疲劳测试方法

本文对经编弹力针织物氨纶丝疲劳和抽拔试验方法进行了研究。首先测试与分析了初伸长和往复拉伸对经编弹力针织物疲劳和抽拔的影响及其显著性。然后结合试穿结果,测试分析了试样有初伸长和无初伸长试验方法氨纶丝疲劳和抽拔的差异。研究结果表明：随着初伸长率的增加,疲劳现象严重,初伸长率对织物的变形率、回复率及氨纶丝疲劳级数有显著影响;随着往复拉伸率的增加,疲劳和抽拔现象的增加,往复拉伸率对织物的变形率、回复率及氨纶丝疲劳级数及抽拔根数有显著影响;有初伸长疲劳试验的结果更符合实际穿着情况;有初伸长疲劳试验的初伸长率为60%,往复拉伸动程≤拉伸隔距的80%。其研究结果对氨纶弹力针织物疲劳试验具有一定的参考价值。     

用进线长度控制圆筒针织物的克重及幅宽

分析了影响圆筒针织物克重及幅宽的因素 ,提出了用进线长度控制针织物克重是合理的方法 ,文中给出了相应的计算公式 ,为合理确定针织物的克重及幅宽提供了依据。     

粘藻纤维针织系列产品的研制与开发

粘藻纤维具有高吸湿性、高透气性、抗菌保健性、生物降解性与相容性等优良性能,结合采用与不同纤维的纱线交织、织物组织变化、纱线结构变化开发了粘藻纤维针织系列产品,介绍了其产品设计思路、针织及后整理工艺.     

竹浆/棉混纺纱针织物的服用性能

以竹浆/棉混纺纱为研究对象,经圆纬机织造和后整理工艺制备出纬平针和双罗纹针织物,测试分析了织物的透气性、透湿性、芯吸性、吸湿快干性、悬垂性、刚柔性和表面摩擦性等服用性能。测试结果显示,竹浆/棉混纺纱针织产品具有良好的春夏季服用舒适性能。     

横机罗纹线圈长度预测模型

通过观察横机罗纹织物的编织过程,经过分析和推导,建立了预测罗纹织物线圈长度的几何模型,并将在设定条件下编织的罗纹织物线圈长度实测值与预测值进行对比,验证了该模型的可行性.结果证明:横机罗纹织物的线圈长度分别与压针深度和齿口距呈较好的线性关系;根据所建模型,可以对普通横机机头上成圈三角位置的刻度重新进行设置,从而解决所标...     

针梭织面料拼接前后物理性能的对比分析

探讨针织、梭织面料拼接前后的物理性能。选取几种常用于拼接的针织、梭织面料试样,利用FAST风格测试仪和KES-FB4表面测试仪测试试样拼接前后的压缩、弯曲、拉伸及表面摩擦、表面粗糙度等物理性能,运用SPSS软件的非参数检验方法,结合具体图表对其进行对比分析。结果表明,针织、梭织面料拼接后的物理性能与拼接前试样存在显著差异。     

Effect of input tension of inlay yarn on the characteristics of knitted circular stretch fabrics and pressure generation

Stretch fabrics are used in manufacturing pressure garments to exert pressure over specific body parts in medical conditions like venous and lymphatic disorders, scar management, and bone and muscle injuries. The amount of therapeutic pressure required in each medical condition is different; therefore, there is a need to engineer the stretch properties of garments to match the requirements in each case. Limited information is available on the relationship between fabric properties and the pressure generated on the body. In this paper, an attempt has been made to study the effect of inlay yarn pre-tension at the time of manufacturing of stretch fabrics on the pressure generated by the garments. Results show that change in inlay pre-tension significantly changes the structural characteristics of the fabric but the load elongation behavior remains unchanged up to 100% extension. Pressure exerted on rigid cylindrical tubes increases with reduction factor of the fabric tube and the curvature of the cylinder.     

Influence of some sewing parameters upon the sewing efficiency of denim fabrics

This paper reports an experimental investigation of the effect of the seam threads linear density, the stitch density and some fabric properties on the seam efficiency. Furthermore, on the basis of the seam quality parameters, regression models were determined in order to predict seam efficiency. In this work, 18 denim fabrics, having different compositions and masses, were sewn with two commercial sewing threads. Their performances, ranked according to the seam quality, were also determined. The seam efficiency was calculated by determining of the seam tensile strength and the fabric tensile strength. It was concluded that the increase in the seam thread linear density increases the seam efficiency, as well as the stitch density. However, the fabric mass has a random effect on seam efficiency. About the composition, we conclude that the seam efficiency decreases with polyester but increases with elastane. According to the seam direction, it was found that, in the weft direction, the seam efficiency was more important than in the warp direction.     

Prediction of deformation behavior of interlock knitted fabrics in different directions using FEM method

This study undertakes to predict the deformation behavior of conventionally interlock knitted fabric using a novel geometrical model. Deformation behavior of this kind of knitted fabrics was numerically simulated in course, wale, and bias directions, using FEM method. In order to elaborate the study, high and medium tightness interlock knitted fabrics were selected and deformation of fabrics analyzed in course, wales and bias directions (0°, 45°, and 90°). Accuracy of the proposed geometrical model was investigated comparing the simulated tensile stress–strain curve to the measured one. Output data revealed that the stress–strain curve obtained from simulating method has high conformity with the experimental one.     

织物防螨抗菌测试及评价标准的探讨

分析了国内外织物防螨抗菌测试方法及其评价标准的现状、存在的问题及发展趋势。为了正确评价织物的防螨抗菌性能,并结合我国防螨抗菌织物的实际情况和测试方法滞后的现状,提出了加快制定“织物防螨”和“织物抗菌”测试方法及其评价标准的建议。     

Understanding the influence of fibre,yarn and fabric parameters on UV protection of wool-knitted fabrics

This work investigated the influence of fibre, yarn and fabric parameters on the UV protection of fabrics. It proposed a model for UV interaction based on a theoretical hypothesis, targeted experimentation and statistical analysis. Undyed and untreated wool-knitted fabrics with varying mean fibre diameter, yarn linear density, yarn twist, fabric cover factor and fabric structure were examined. A statistical model was presented to report the relationship between fibre/yarn/fabric parameters and fabric UPF values. An optical model on the interaction between the UV light and a single jersey fabric was constructed to understand the penetration of UV light. The models were verified by the UV transmittance results of knitted wool fabrics. The results obtained from the statistical and optical models were used to propose a set of optimized parameters for lightweight summer/spring UV-protective knitted fabrics. Testing confirmed that these fabric parameters provided both high UV protection and good tactile comfort.     

电量传感器在用电测控系统中的应用

设计了一种集中用电测控系统．该系统由1台PC机(上位机)和以5台单片机为核心的电量采集系统(下位机)组成．上位机的RS-485接口通过线缆与各下位机的RS-485接口相连，构成网络化测控系统；下位机利用新型的电子式电量传感器AD7751作为电量测量元件，实现多点电量检测和窃电侦测．该系统由于采用了专用电能传感器，使得电量计算方法简单，且可及时检测到系统短路、盗电等事故，有助于提高用电的安全性。     

Modeling the mechanical and compression properties of polyamide/elastane knitted fabrics used in compression sportswear

A compression sportswear fabric should have excellent stretch and recovery properties in order to improve the performance of the sportsman. The objective of this study was to investigate the effect of elastane linear density and loop length on the stretch, recovery, and compression properties of the weft-knitted polyamide/elastane (PA/EL) stretchable fabrics used in sportswear. Two different tests were performed to study the stretch and recovery properties of the fabric 1st: under low power force and 2nd: cyclic loading under high tension force. Kikuhime pressure sensor was used to measure the pressure generated by different PA/EL knitted sample garment sleeves. It was found that with the increase in elastane linear density there is an increase in fabric course density, areal density, recovery percentage, and compression, and fabric stretch percentage and elongation percentage decreased in both course and wale direction. The results of fabric samples were analyzed in Minitab statistical software. The coefficients of determinations (R² values) of the regression equations showed good prediction ability of the developed statistical models.     

The use of test day information to predict energy intake of dairy cows in early lactation

This study aimed to validate a previously developed model for the estimation of energy balance in high producing dairy cows from test day information during the first 12 wk of lactation. Monensin (an ionophor) increases the energy status of dairy cows. Gold standard for the validation was a higher energy status, indicated by lower blood ketone body concentrations, lower percent milk fat, and higher milk-yield of monensin-supplemented than control cows in 8 randomized block design feeding trials. Estimated energy intake (eE(intake)) was calculated as estimated energy balance (eEB) plus energy in actual milk produced (in units of MJ(nel)) plus a constant or variable amount of energy required for maintenance. The variable amount was based on BW, while the constant was the average BW in each parity group (1, 2, 3, 4+). Both eEB and eE(intake) were compared between groups of cows with and without monensin supplementation (n = 600 lactations). The trials started with a presupplement period during lactation wk 2 to 5 followed by a supplementation period during lactation wk 6 to 12. During the presupplement period, both eEB and eE(intake) were similar for all cows. At 2, 3, and 8 wk after starting the monensin supplementation, the eEB of the supplemented cows was significantly higher, while eE(intake) was significantly higher throughout the supplementation period. The results were similar for the 2 methods of calculating energy for maintenance, variable or constant. The feed conversion efficiency, calculated as kg of fat-protein corrected milk per MJ(nel) of eE(intake), was highest in first calving cows compared with cows having more lactations, and correlated with standard milk production at trial group level. It was concluded that eE(intake) was a valid measure of net energy absorption.     

汽车用纺织品检验标准评述

针对汽车用纺织品标准不配套或者是执行不严格的问题,分析了汽车用纺织品检验标准的现状、内容和实施情况,并结合实例对比了目前国际汽车行业领先的美国、欧洲等国家与我国的相关车用纺织品标准,探讨了我国车用纺织品行业采用国际标准的必要性和相应措施,供有关企业和设计部门参考借鉴.     

基于结构特征的织物热传递性能预测研究进展

为了预测织物热传递性能,更好地进行织物设计,从而提高织物的热舒适性能,从不同建模方法的角度介绍了与织物结构参数及内部特征相关的织物热传递性能预测模型,包括统计模型、人工神经网络模型、数学理论模型和有限元模型,并分析了各类预测模型的特点和适用范围。回顾并总结了近年来国内外织物传热模拟的研究现状。此外,总结了含水分织物以及含相变材料织物的热传递模型及研究进展。综合以上文献分析,指出可通过优化织物结构特征提升织物热传递性能,并提出织物传热性能预测研究的发展趋势,为服装热舒适性研究提供新的思路。     

负压蒸发系统汽提塔二次蒸汽利用的分析

以2 500 t/d大豆加工厂为例,对浸出车间汽提塔二次蒸汽热能利用进行了分析。通过增加200 m2的换热器,将汽提塔二次蒸汽与一蒸后的混合油进行换热,可将混合油的温度由55℃提升至62℃。经计算,可节省蒸汽1.98 kg/t,可减少冷凝系统循环水热负荷491 952.71 kJ/h,同时使蒸发系统的真空系统更加稳定,对提高油脂加工厂的生产稳定和经济效益有重要的意义。