In previous research much effort has been devoted to the geometry of woven fabrics and relat-ed problems under the assumption of constant yarn configuration in fabric.This paper will first re-port that image crimp (ya...In previous research much effort has been devoted to the geometry of woven fabrics and relat-ed problems under the assumption of constant yarn configuration in fabric.This paper will first re-port that image crimp (yarn crimp measured by an image analysis method) seems larger than actualvalue.From the explanation of this result,the variation of yarn configuration in woven fabric dueto the non-uniform flattening is revealed.The significance of this actual structure of woven fabricsis discussed.It is believed that the variation of yarn configuration is very important for fabric per-formance,and may be an advantage for fabric quality.展开更多
Manufacturing of a macro-scale helix auxetic yarn(HAY)was described. Consequently areal woven fabric and three kinds of woven fabrics various in weaves were introduced respectively. Their expected auxetic effect( assu...Manufacturing of a macro-scale helix auxetic yarn(HAY)was described. Consequently areal woven fabric and three kinds of woven fabrics various in weaves were introduced respectively. Their expected auxetic effect( assured by double helix yarn) was tested through the Poisson's ratio value(for auxetic structure is negative).Other observed parameters talked about variation in woven fabric porosity and the pores' parameters during the sample straining.Setting of this non-standard test( connection between dynamometer and image analysis) was also introduced. The differences among observed parameters were evaluated and conclusions for three types of woven fabrics were determined. It was found that less auxetic behavior caused less porosity. Less auxetic structure( satin) with longer floating threads embodies bigger pores' size and less circularity. The plain pattern has the greatest porosity but the smallest pores; the satin pattern behaves by contraries.展开更多
In the previous studies, the optimum technological combination has been obtained for producing coarse pure ramie noil yarns on rotor spinning system currently. Because of no yarn properties standard available at prese...In the previous studies, the optimum technological combination has been obtained for producing coarse pure ramie noil yarns on rotor spinning system currently. Because of no yarn properties standard available at present for suchlike yarns, it is considered necessary to analyse the acceptability of coarse pure ramie noil rotor-spun yarns in terms of yarn properties before their products being developed. By the aid of a hypothetical concept "pure ramie noil ring-spun yarn", this paper draws the conclusion that the coarse pure ramie noil rotor-spun yarns are condsidered acceptable to a great extent; furthermore, it introduces 5 kinds of woven fabrics and 3 kinds of knitted fabrics successfully designed and developed from those yarns.展开更多
目的对腹腔镜手术中常用的无纺纱布含液量进行测试,评估患者术中失血量。方法使用生理盐水进行无纺纱布含液量实验,对10 cm×10 cm 4层无纺纱布、7 cm×7 cm 4层无纺纱布、8 cm×10 cm 8层无纺纱布用0. 9%Na Cl进行模拟腹...目的对腹腔镜手术中常用的无纺纱布含液量进行测试,评估患者术中失血量。方法使用生理盐水进行无纺纱布含液量实验,对10 cm×10 cm 4层无纺纱布、7 cm×7 cm 4层无纺纱布、8 cm×10 cm 8层无纺纱布用0. 9%Na Cl进行模拟腹腔镜手术含液量试验。结果 10 cm×10 cm 4层无纺纱布饱和度是10 ml,经10 mm腹腔镜trocar取出后含液量是9 ml;7 cm×7 cm 4层无纺纱布饱和度是8 ml,经10 mm腹腔镜trocar取出后含液量是6 ml;8 cm×10 cm 8层无纺纱布饱和度是12 ml,经10 mm腹腔镜trocar取出后含液量是10 ml。结论对腹腔镜手术中常用的无纺纱布含液量进行测试,可帮助术者及麻醉医师有效估算术中失血量。展开更多
文摘In previous research much effort has been devoted to the geometry of woven fabrics and relat-ed problems under the assumption of constant yarn configuration in fabric.This paper will first re-port that image crimp (yarn crimp measured by an image analysis method) seems larger than actualvalue.From the explanation of this result,the variation of yarn configuration in woven fabric dueto the non-uniform flattening is revealed.The significance of this actual structure of woven fabricsis discussed.It is believed that the variation of yarn configuration is very important for fabric per-formance,and may be an advantage for fabric quality.
文摘Manufacturing of a macro-scale helix auxetic yarn(HAY)was described. Consequently areal woven fabric and three kinds of woven fabrics various in weaves were introduced respectively. Their expected auxetic effect( assured by double helix yarn) was tested through the Poisson's ratio value(for auxetic structure is negative).Other observed parameters talked about variation in woven fabric porosity and the pores' parameters during the sample straining.Setting of this non-standard test( connection between dynamometer and image analysis) was also introduced. The differences among observed parameters were evaluated and conclusions for three types of woven fabrics were determined. It was found that less auxetic behavior caused less porosity. Less auxetic structure( satin) with longer floating threads embodies bigger pores' size and less circularity. The plain pattern has the greatest porosity but the smallest pores; the satin pattern behaves by contraries.
文摘In the previous studies, the optimum technological combination has been obtained for producing coarse pure ramie noil yarns on rotor spinning system currently. Because of no yarn properties standard available at present for suchlike yarns, it is considered necessary to analyse the acceptability of coarse pure ramie noil rotor-spun yarns in terms of yarn properties before their products being developed. By the aid of a hypothetical concept "pure ramie noil ring-spun yarn", this paper draws the conclusion that the coarse pure ramie noil rotor-spun yarns are condsidered acceptable to a great extent; furthermore, it introduces 5 kinds of woven fabrics and 3 kinds of knitted fabrics successfully designed and developed from those yarns.
