关键词: 水性涂料色浆, 协同分散, 着色效果, 耐候性, 印花织物

Abstract: Colored curtains not only give a sense of pleasure and comfort for residents through color adjustment, but also offer strong UV protection. Currently, pigment printing and dyeing are the two most commonly used methods for preparing colored curtains. Compared with dyeing, pigment printing has advantages such as a wider range of applicability and being environmentally friendly. Meanwhile, pigments excel over dyes in terms of light resistance, chemical resistance, and weatherability, thus enhancing the weather resistance of curtain fabrics. However, an adhesive needs to be added due to the lack of affinity between pigments and fibers. The addition of adhesive can easily lead to secondary aggregation of color paste in waterborne dispersible pigments, which results in poor color uniformity in printing and affecting aesthetics and functionality of colored curtains.
To clarify the synergistic dispersion mechanism between dispersants and adhesives in waterborne pigment paste, a series of waterborne pigment paste was prepared by screening different types of dispersants and adhesives, and color printed fabrics were prepared by using screen printing technology. By using a nanoscale laser particle sizer and a transmission electron microscope, the particle size and morphology of waterborne pigment paste were characterized. Comparative analyses were conducted on the K/S value, color fastness to dry and wet rubbing, air permeability, stiffness, breaking strength, UV protective performance, and UV light fastness of the colored curtain fabrics. The results indicated that dispersants containing aromatic ring structures had strong π-π interactions with adhesives, which could form a synergistic dispersion effect. Compared with the commercial dye/pigment coloring effects, the printed fabrics prepared with the pigment paste in this experiment exhibited the highest K/S value (4.4), achieved a color fastness rating of 5, improved breathability to 157.76 mm/s, and increased breaking strength to 1,700.90 N and stiffness to 8.92 cm. Additionally, the printed fabrics demonstrated excellent UV protection performance (TUPF: 95.3±0.7 and TUVA: 4.7%± 0.2%), and their fading rate was only half of commercial dyes, showcasing good application potential in the field of curtain fabrics.
The research will not only provide technical support for the optimization of key process parameters in nano-based waterborne coatings but also offer certain theoretical foundations and practical guidance for the scientific design of high-UV-resistant colored curtain fabrics.

Key words: waterborne pigment paste , synergistic dispersion, coloring effect, weathering resistance, printed fabric