1, what is cool feeling fabric
Cool feeling fabric is generally a unique way (such as fiber raw material modification or fabric finishing processing, etc.), so that the fabric has a rapid diffusion of body heat, accelerate sweating and cooling effect, can be durable to maintain the cool feeling of the fabric fabric and comfort. Cooling fabrics are widely used in clothing, home textile products, outdoor sportswear and so on.
The main feature of cool feeling fabrics is instant cool comfort, which is mainly embodied in the following two aspects: First, good thermal conductivity, which can quickly dissipate body heat and make the wearer have a cool feeling. The second is good moisture conductivity, the sweat produced by the human body can be quickly transferred to the outer layer of the garment, taking away a lot of heat, giving people a cool and comfortable feeling.
2, cool feeling fabric processing method
There are the following ways about the processing of cool fiber existing in the market:
2.1 Cool feeling fiber
The processing methods of cool-sensitive fibers are generally divided into the following kinds.
One is the physical blending method, where the polymer masterbatch and mineral powder with good thermal conductivity are mixed well, and then cool-sense mineral fibers are prepared by conventional spinning process. Common cool mineral fibers include mica fiber, jade powder fiber, pearl powder fiber and so on. Among them, mica fiber is more common, the chemical properties of mica are stable, and its thermal conductivity, water absorption and insulation are better.
Another is the food grade xylitol added to the fiber spinning liquid, after spinning xylitol can be evenly distributed in the fiber, through the infrared temperature tester to test the fiber under the skin heat source under the circumstances of the temperature rise, add xylitol fiber on the heat absorption fast.
Another cool feeling fiber can be achieved through the design of the fiber cross-section, shaped fiber cross-section to the fiber to bring longitudinal multi-groove structure, these grooves are conducive to the improvement of the core suction function. At present, the shaped cross-section of the fiber is mainly obtained through the melt spinning method, using different spinneret shapes can be spun out of Y-shaped, cross-shaped and other shaped fibers. And through the design of the fiber cross-section, the fiber has a "capillary effect" to strengthen the heat dissipation speed.
2.2 Cooling auxiliary finishing
Cooling finishing textiles will cool microcapsules or xylitol cool finishing agent through conventional impregnation, dip rolling or coating and other ways attached to ordinary textile fabrics, so that it has the function of instant cooling.
Cooling microcapsule processing technology is mainly a liquid, solid capsule with cooling function of new material refinement, and then these microdroplets or particles as the core, so that the polymer film-forming materials on which the deposition, coating and the formation of a layer of film, the capsule core of the functional material package.
3, the test of cool feeling effect
There are two main test methods for cool-sense textiles, one is the temperature sensor direct measurement method, and the other is the Qmax method.
3.1 Temperature sensor direct measurement method
The temperature sensor direct measurement method is suitable for the test of moisture-absorbent and moisture-conducting cool fabrics. First of all, the sample to be tested is placed in the oven at 70℃ to dry, and then put into the temperature and humidity can be controlled constant temperature and humidity box (temperature 35+-0.5℃, relative humidity 27%+-3%), and then in the center of the specimen drops of 0.5mL (35+-0.5℃) of water, and quickly fold the specimen, so that the temperature sensor is located in the center of the specimen, and use the clip to fix the temperature sensor. Record the temperature every 5min until the end of 60min. A temperature-time curve can be obtained from the recorded temperature data. The lower the temperature at the lowest point in the curve, the more pronounced the cooling sensation, the lower the temperature at the end of the test, the longer the fabric stays cool.