Physical Properties of Polyurethane Blend Dope-Coated Fabrics
Physical Properties of Polyurethane Blend Dope-Coated Fabrics
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DOI：
10.1177/004051759706700808
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发表时间：
1997-08
影响因子：
2.3
通讯作者：
M. Enomoto;K. Suehiro;Y. Muraoka;K. Inoue;M. Sumita
中科院分区：
文献类型：
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作者：
M. Enomoto;K. Suehiro;Y. Muraoka;K. Inoue;M. Sumita
研究了聚酯型聚氨酯（pu）/聚氯乙烯（pvc）共混物涂料涂层尼龙织物的截面结构对透湿性能的影响。防水涂料采用单面湿凝法施工。疏水性聚氯乙烯和亲水性聚氨酯的共混形成了一个三层的横截面结构富含聚氯乙烯的微网，多孔的富含聚氨酯的层，和尼龙织物。随着pvc与pu共混比的增加，涂层织物的透湿性和结露性都有所改善。与PU均聚物相比，重量比为4：1的PU/PVC共混物的mp值增加1.18倍，达到492 g/m2·h（JIS A-1方法）和1.16倍，达到815 g/m2·h（JIS B-1方法），但dc值降低四分之一，为4.60 g/m2 · h。这种梯度三层横截面结构有助于蒸气传输性能。
We investigate the effects of the cross-sectional structure of a polyester-type polyurethane (pu)/polyvinylchloride (pvc) blend dope-coated nylon fabric on moisture permeability. The waterproof coating is applied by a one-sided wet-coagulation process. The blending of hydrophobic pvc to hydrophilic pu forms a three-layered cross-sectional structure—a pvc-rich micronetwork, a porous pu-rich layer, and the nylon fabric. As the blend ratio of pvc to pu increases, the moisture permeability (mp) and dew condensation (dc) of the coated fabrics improve. Compared to the pu homopolymer, the mp value of a pu/pvc blend in a weight ratio of 4:1 increases 1.18 times to 492 g/m2·h (JIS A-1 method) and 1.16 times to 815 g/m2·h (JIS B-1 method), but the dc value decreases one-fourth to 4.60 g/m2 · h. This gradient three-layered cross-sectional structure contributes to vapor transport properties.