The demand for products of the Pyongyang Hosiery Factory is now increasing.
Dyed thread, which was produced and used by the factory, had not clear colours in the past. But the factory produces a variety of socks by adding fluorescent powder to the pre-treatment processes of dyed thread so that it can present vivid colours. It conducted experiments according to the content of locally-produced caustic soda, processing temperature and time to produce dyed thread with florescent effect without affecting the tension of thread.
It also conducted research to remodel the water softening device in order to overcome the defect of dyeing process staining thread.
Kim Chung Hyok, section chief of the industrial technology institute of the factory, said that when the dyeing water contains lots of metal ions, different colours appear and many other demerits in which dyed thread is stained with colours. The technical group of the factory replaced the duct line of the water softening apparatus to overcome such demerits and refashioned the water softening device to manage soft water on a science footing.
They also solved the problem that the hasp was stained by dyes for its high or low density by ensuring the rational density of thread in the high temperature pressure dyeing.
Besides, the factory has also introduced various technical innovation plans to improve the quality and quantity of production including the polyurethane tetron combined yarn production method to localize the imported neck fold of sheep so as to save time and lower cost of the production of neck fold of sheep.
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