彩色水性聚氨酯制备超细纤维合成革贝斯

Preparation of Microfiber Synthetic Leather Base by Using Colored Waterborne Polyurethane

为解决超细纤维聚氨酯合成革染色中存在的问题,探讨了应用彩色水性聚氨酯(CWPU)浸渍超细纤维基布制备免染色合成革贝斯的可行性及工艺条件。分别考察了凝固液醋酸浓度、CWPU用量等因素对贝斯色差值(DE*)的影响。结果表明,DE*随醋酸浓度的升高及CWPU用量的增加而提高。当醋酸浓度为0.20 mol/L,CWPU用量为基布质量的30%时,所得贝斯色彩饱满、均匀。基布减重率为6%~12%时,贝斯正、反面的色差值(ΔE)最小。色牢度测试结果表明,所得贝斯具有较好的耐水洗色牢度,耐皂洗色牢度随后处理温度的升高而提高。

To solve the existing problems in dyeing microfiber-polyurethane synthetic leather（MPSL）,a novel colored waterborne polyurethane（CWPU） was used as an immersing matrix of microfiber nonwovens to prepare the MPSL base.The factors affecting the color difference（DE＊） values of bases,such as the concentration of acetic acid solution（as a coagulator of CWPU）,the dosage of CWPU and so on were investigated in detail.It was found that the DE＊values of bases increased with increasing the concentration of acetic acid solution and the dosage of CWPU.Colorful and leveling dyed bases were obtained when the concentration of acetic acid was 0.2 mol/L and the dosage of CWPU was 30% on the basis of the mass of microfiber nonwovens.Moreover,the bases exhibited the smallest color differences（ΔE） between the obverse and reverse surface when the weightloss ratios of microfiber nonwovens were 6% ~ 12%.The color fastness test results indicated that the prepared bases had good washing color fastness by water,while the washing color fastness by soap solution increased with the increase of drying temperature.