It tested and compared the water impermeabilities and air permeabilities of five different textures hemp fabrics,including honeycomb weaves,oatmeal weaves,bird's-eye weaves,crepe weaves and openwork weaves,and four plain weave fabrics with different tight-degree.The results show the permeability of the fabric is closely related to the fabric warp and weft density,warp and weft yarn numbers and yarn twist.

Quality prediction and control in the knitting production process can help optimize the knitting technology,improve and stabilize the product quality and effectively promote the capability of fast response.This paper summarizes the present situation,content and method of study about the quality prediction and control technology,mainly focuses on the study methods including artificial nerve network,genetic algorithm,genetic rule and fuzzy mathematics,points out the developing direction of this technology,and emphasizes that computer intellectualization is the trend of future quality control.

The basic structure and properties of Yamamai silk after heat treatment were studied. Through experiments and finding that:the initial modulus didn't change obviously,and the breaking strength,the break elongation ratio as well as the elasticity all declined,the weight lost and the color turned to yellow,the crystallinity increased first,then decreased.

Effect of chemical modification treatment on natural pale green cotton property was studied.Pale green cotton fiber was modified through alkali treatment and glutaraldehyde cross-linking.Properties of treated pale green cotton were tested,including strength & elongation,elastic recovery,moisture regain and fiber morphological structure.The test shows that strength & elongation,elastic recovery of pale green cotton are improved after alkali treatment.Property of pale green cotton treated by 17% sodium hydroxide solution for 10 min could be improved obviously.Strength of pale green cotton could be increased and the breaking elongation rate could be reduced after glutaraldehyde cross-linking treatment,the breaking elongation rate is reducing and the elastic recovery is increasing when grafting percentage is increased.

对经盐处理后,天蚕丝在结构与性能上的变化进行了研究.实验结果表明:与桑蚕丝和柞蚕丝相比,虽然天蚕丝的结晶度最小,强度也较小,但其伸长度最大,弹性也较好;天蚕丝的吸湿性能优于柞蚕丝,但比桑蚕丝差;天蚕丝经钙盐处理后,有失重现象,可以生成明显的微孔穴和原纤化特征,纤维结构变得松弛,结晶度下降,断裂强度、断裂伸长、初始模量和断裂功等,均呈下降趋势.