Photochromic compounds can be used to produce photochromic textiles with photochromic properties. Currently, photochromic textiles are mainly prepared in the following four ways. 1 paint printing method In the paint printing method, a photochromic dye powder is mixed in a binder such as a resin liquid, and then the fabric is printed with a color paste, and a photochromic fabric is obtained by a procedure such as fixation, water washing, and drying. This method is non-selective for fibers and fabrics and is suitable for both woven and knitted fabrics. The color-changing paint used for printing processing should meet the requirements of soft hand feeling, good washing resistance and good rubbing fastness. 2 stock solution coloring method The raw liquid coloring refers to a method of producing a photochromic fiber by uniformly dispersing a photochromic compound in a spinning solution of various chemical fibers. According to the difference of the spinning solution, it can be divided into two categories. (1) Melt spinning The photochromic compound is melt-blended with a polymer such as polyester or polypropylene, or the photochromic compound is dispersed in a resin carrier capable of being mixed with the spinning polymer to form a masterbatch, and then mixed into the polyester. In the polymerization of polypropylene or the like, melt spinning is carried out to obtain a photochromic fiber. (2) solution spinning Similar to the conventional solution spinning method, it is necessary to add a dye having a reversible color function and a dye transfer preventing agent to the fiber-forming spinning solution, that is, directly adding the photochromic compound and the agent for preventing the transfer thereof to the spinning. Spinning is carried out in the liquid. 3 graft polymerization The graft polymerization method mainly uses graft polymerization technology to impart discoloration properties to the fibers. For example, fibers or fabrics are impregnated with a monomer containing a spiropyran derivative, and a monomer (typically styrene or vinyl acetate) is grafted into the fiber to impart photochromic properties to the fiber. 4 ink printing method This is an application method based on microcapsule technology. The so-called microcapsules are made by combining photochromic compounds with other auxiliaries (solvents, light stabilizers, etc.), and by natural or synthetic polymers or microbial membranes, which are encapsulated by phase separation, interfacial reaction, physical methods, etc. Small balls of a few microns to tens of microns to avoid the effects of high temperatures and other impurities, and to strengthen contact with other additives. The color-changing microcapsules are then fixed to the surface of the fabric by ink printing to obtain a photochromic fabric. Furniture Handle,Hardware Furniture Handle,Knobs Handles Cheap Handle,Drawers Furniture Door Knobs ONLEE HARDWARE CO.,LTD , https://www.onleehardware.com
Fabric process photochromic fabric production method