干燥时受力状态对皮革得率和透水汽性的影响  

Influence of Stress State while Dried on Leather Yield and Water Vapor Permeability

作　　者：都婧[1] 汤克勇[1] 赵康[1] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450001

出　　处：《中国皮革》2014年第1期23-28,共6页China Leather

基　　金：国家自然科学基金(No.21076199;51373158);河南省科技厅(124300510030)资助项目

摘　　要：以牛蓝湿革为原料,通过戊二醛复鞣和MK加脂后制得了坯革试样。在常压干燥和真空干燥2种干燥方式下,分别对试样施加单向拉伸和双向拉伸的应力作用。通过改变拉伸程度,研究了不同应力状态的力对皮革结构与性能的影响,重点研究了得革率、透水汽性能的变化规律。结果表明:干燥时拉伸可以提高皮革的得革率和透水汽性能;在双向拉伸应力状态下干燥,皮革的得革率及透水汽性能远高于在单向拉伸应力状态下干燥的试样。坯革试样的得革率与其厚度的变化率有一定关系,而透水汽性能与试样的最终厚度密不可分。After being chrome tanned, the wet blue was glutaraldehyde retanned, neutralized, and fat liquored to get different crust samples. Uniaxial stress and biaxial stress were applied to the leather samples under the condition of ambient drying and vac- uum drying. The influence of different stress state on leather structure and performance was studied by changing the stretch level. And the leather yield and water vapor permeability was investigated. The results show that after being dried with stretching, the leather yield and water vapor permeability are both increased, no matter uniaxial stretching or biaxial stretching mode is used. Un- der the biaxial stretching leather yield and water vapor permeability is better than that of the uniaxial stretching. The leather yield is related with the leather thickness change, and there is a close relationship between the water vapor permeability and the final thickness of the samples.

关 键 词：拉伸 皮革 力学性能 得革率 透水汽性 真空干燥 烘箱干燥 

分 类 号：TS54[轻工技术与工程—皮革化学与工程]