2results about How to "Good quick drying" patented technology

The utility model relates to a sun-proof quick-dry cool-feeling yarn which is of a bi-component skin-core structure, the bi-component skin-core structure comprises a core layer and a skin layer, the core layer is made of PA materials and has high specific heat capacity, so that the specific heat capacity of the yarn is greatly improved, and the PA materials have soft performance, so that the yarn has good softness while keeping cool feeling; the skin layer is made of a PET (Polyethylene Terephthalate) material, has excellent quick-drying performance and can quickly disperse moisture, so that the skin sticking phenomenon caused by sweating is avoided; the heat-conducting particles are added into the skin layer, so that the heat-conducting property of the skin layer is improved, the heat-conducting property of the yarn is remarkably enhanced, and the yarn has a more lasting and cool touch feeling by combining the heat-conducting particles with the PA with high specific heat capacity of the core layer; the nano-scale heat-conducting particles uniformly dispersed in the skin layer can reflect sunlight, reduce the absorption of sunlight heat energy by the yarn, improve the sun-screening performance of the fabric, play the antibacterial role of the nano-material, and solve the problems that a traditional after-finishing sun-screening agent is easy to fall off and the antibacterial effect is invalid.

This invention discloses a fast-drying waterborne polyurethane resin, its preparation method, and its application. By weight, it comprises the following components: 30-40 parts of self-made polyester polyol, 30-50 parts of polyether polyol, 2-5 parts of chain extender, 1-3 parts of hydrophilic monomer, 1-3 parts of trimethylolpropane, 40-60 parts of isocyanate, 1.1-1.5 parts of neutralizer, and 50-80 parts of solvent. This fast-drying waterborne polyurethane resin utilizes self-made branched polyester and polyether to construct flexible segments that combine rigidity and flexibility. Low hydrophilic monomer content enables self-emulsification and ensures water resistance. Trimethylolpropane and self-made polyester polyol form a double crosslinking network with built-in branching points. Isocyanate compounding balances hardness and pot life. The high R-value design allows residual NCO to naturally generate urea bonds during emulsification, compensating for the emulsification difficulties caused by low hydrophilicity. Ultimately, it achieves a balance between fast drying and high water resistance without the addition of external drying agents or amine-based chain extension. It combines fast drying, high water resistance, and excellent mechanical properties. The process is simple and low-cost, making it highly valuable for industrial promotion.