Abstract:

Poly-amide wet coating is the technique that can generate a continuous micro-porous membrane on the fabric surface after the fabric is solidified from dipping in the coating slurry, which made of dissolving the Poly-amide in CaCl2 / methanol mixed solvent. For the sake of obtaining superior performance on the trademark fabrics by Poly-amide wet coating process, the preparation?mechanism and membrane properties were studied by taking advantage of the infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Differential Scanning Calorimetry (DSC), the 3D microscope and scanning electron microscope (SEM). The results showed that Ca2+ can broke the hydrogen bonds in the poly-amide, so that the solubility of the poly-amide in the CaCl2 / methanol mixed solvent rapidly increases, and the high solubility shows up as excellent complex when the mass ration between poly-amide and CaCl2 reaches to 2:1. The poly-amide membrane has excellent physical characteristics, such as smooth surface, cellular cored structure and spongy asymmetric groove structure in the cross section. When adding carbon black and dye in the coating slurry, the poly-amide?membrane will became black, meanwhile many holes will be distributed on the membrane surface and the membrane get more rough, this meaningful phenomenon lays foundation for exploring new trademark fabrics by black wet coating process as powerful theoretical?basis.