As early as the 1930s. The polyvinyl alcohol fiber that was originally developed was made of medical surgical yarn and surgical suture in Germany by taking advantage of its water-soluble feature. In World War II, the United States used PVA fibers to make parachutes for laying mines. At the end of the 1950s, Japan's water-soluble fiber production accounted for 20% of the total production of polyvinyl alcohol fibers.
Development of Water Soluble Fiber
Selection of process route
There are two process routes for Water-soluble PVA Fiber, one is dry spinning and the other is wet spinning. Dry spinning is characterized by short process flow, low water melting temperature and good product quality, but low output and high production cost. Wet spinning is characterized by long process flow, high output and low production cost. Based on the vinylon production line, the equipment in the finishing part can be slightly modified, and the water-soluble fiber can be developed by using the wet spinning process route, which has achieved success.
Raw materials
The raw material of water-soluble fiber is polyvinyl alcohol. In a factory with a polyvinyl alcohol production line with an annual output of 20,000 tons, fibers soluble in water at about 90°C can be developed using polyvinyl alcohol with a degree of polymerization of 1,700 to 1,800.
Process
The process of Water-soluble PVA Fiber is mainly composed of three major processes: dope preparation, spinning, heat treatment and finishing.
Application of Water-soluble PVA Fiber
The Water-soluble PVA Fiber is used as an intermediate fiber to blend with other fibers, and the water-soluble polyvinyl alcohol fiber is dissolved out after textile processing to produce high-count, light and high-grade pure wool fabrics and high-grade linen fabrics. Water-soluble PVA Fibers can be used It is used for warp yarn sizing of fabrics, which has the advantages of uniform sizing, stable chemical structure, good corrosion resistance, and simple and easy process. Water-soluble PVA Fibers are used as weft yarns after weaving, and the weft yarns are dissolved in hot water to make weft-free blankets; water-soluble The non-woven fabric can be used as the base fabric for embroidery in the garment industry. After processing, the non-woven fabric can be disposed of in hot water to retain the embroidered pattern.
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