As a new type of textile material, milk protein fiber is mainly composed of protein. It is made from liquid milk that is dewatered and defatted and then added with a kneading agent to make milk slurry, and then processed through new processes such as drying and spinning. Milk protein fiber has the advantages of natural fiber and chemical fiber, with high strength and good anti-mold and moth-proof properties. Textiles made from milk protein fiber have a soft feel, good water absorption and breathability. Clothing made from it has good nutritional and protective effects on human skin. It integrates comfort, beauty, health and health care, and is especially suitable for To make high-end clothing and underwear, the development and production of milk protein fiber yarn has broad prospects in the textile industry.
Germanium-containing health-care milk protein composite fiber is a higher-tech functional health-care fiber developed on the basis of conventional formaldehyde-free vinylon milk protein composite fiber. It does not contain soy protein fiber and some milk with formaldehyde vinylon as a carrier. The vinylon component contained in the protein composite fiber is condensed with formaldehyde and does not contain harmful carcinogens such as formaldehyde. Its germanium content is several times that of Japan’s germanium-containing health fiber. Due to the addition of germanium material in the fiber, the clothing made of this fiber can emit far-infrared waves with high emissivity at 32 degrees when worn close to the body at a temperature lower than the surface temperature of the human body (36 degrees). Promote blood circulation. At the same time, the excited electrons can combine with oxygen and water molecules around the skin to generate negative oxygen ions and hydroxyl negative ions to achieve the functions of sterilization and fresh air. They can also capture hydrogen in the skin and promote cells under the same amount of common oxygen. Activation reduces the rate of skin aging. Moreover, trace amounts of germanium in the germanium-containing protein composite fibers that are close to the skin when worn can also be absorbed through the skin and enter the body to form organic germanium, which is recognized as having the beneficial effects of organic germanium on preventing cancer, aging, and preventing aging in the body. health effects. The germanium content in the fiber is greater than 200ppm, and the solid content of milk protein in the fiber is greater than 20%. The fiber fineness is 1.5d and can be made into short fibers of any length. The price is only 120,000/ton. The newly developed intelligent temperature-regulating germanium-containing health-care milk protein composite fiber has better temperature-regulating performance than the intelligent temperature-regulation fiber produced by the famous American outlast company using aerospace technology (the intelligent temperature-regulation type germanium-containing health-care milk protein The temperature-regulating phase change enthalpy of the composite fiber can reach more than 16j/g), and it is also different from the material composition of Outlast’s intelligent temperature-regulating fiber. The main component of the material of Outlast’s intelligent temperature-regulating fiber is composed of acrylic or viscose, while Snow Lotus The main component of the fiber material developed by Hengtian is composed of milk protein complex material that does not contain formal vinylon, which improves the skin-friendliness and comfort of the fiber and increases the selling point of the fiber.
Milk fiber process flow
According to the characteristics of milk protein fiber, in order to improve the spinnability of the raw material and ensure that the fiber is less damaged, a shorter process flow is adopted in the blowroom process, focusing on opening and mixing to reduce the impact points. The entire process The process adopts the process principle of less shedding and more combing. The specific process flow is as follows:
Milk protein fiber (after health care) → fa002d automatic cotton picking machine → sfa035c mixed cotton opening machine → fa106b (combing needle) cotton opening machine → fa161b vibrating cotton box feeder → 076f single hand rolling machine → fa231a carding machine → fa311f Draw frame (two passes)→fa423a roving frame→fa506 spinning frame→ga013 winding machine→asga-221 warping machine→asga363-s sizing machine→(g177 reed)→p7100 projectile loom→inspection and finishing→ In packages.
Problems and technical measures in the spinning process
In the raw material processing process, due to the high specific resistance of milk protein fiber, serious electrostatic phenomenon, and small friction coefficient between fibers, phenomena such as cylinder winding and flower absorption are prone to occur during the spinning process. Therefore, milk protein fiber must be processed before being put into production. Carry out necessary health treatment and add appropriate amounts of antistatic agents and oil agents. This is the key to making milk protein fiber yarn. At the same time, it is appropriate to ensure that the moisture regain rate of milk protein fiber on the machine is 13% to 15%. In addition, it is necessary to ensure the relative humidity of each production process, and at the same time, do a good job in moisturizing and protecting the semi-finished products in each process to avoid the inconvenience caused by static electricity that occurs after the semi-finished products are wetted out during the production process.
The blowroom process has the characteristics of good uniformity of milk protein fibers, less impurities, and serious static electricity. In the blowroom process, the process principles of short process, less grasping and frequent grasping, more loosening and less beating are adopted. Appropriately reduce the speed of each beater. The sfa035c mixed cotton opener only uses parallel beaters and skips its porcupine beater. At the same time, the fa106b cotton opener uses combing needle beaters to reduce damage to fibers. In order to reduce the volatilization of moisture and oil in cotton rolls, the cotton rolls must be wrapped in plastic film wrapping bags after being rolled, and production is required to be done first, first used.
In the carding process, due to the serious electrostatic phenomenon of milk protein fibers and poor cohesion between fibers, it is easy to get entangled with cylinders, doffers, aprons, etc. during the production process of the carding process. Therefore, the operating speed of each component must be controlled at a low level, and at the same time, it is necessary to control the speed of each component. To improve fiber transfer and reduce neps, the distance between each part should be reasonably optimized. Since milk protein fiber is relatively expensive, the rear process of the carding machine mainly focuses on less or no shedding. The company adopts a fully enclosed rear process and reduces the speed of the cover plate to reduce noil and improve the production rate. When producing this variety, the humidity of the carded cotton should be relatively high.Control, the relative humidity is generally controlled at around 70%. In order to improve the quality of the raw sliver, the process principle of “light quantity, slow speed and tight gap” is adopted. In addition, the pressure of the pressure roller should be controlled at a low level to reduce damage to the fibers.
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