One-step direct spinning process for terylene industrial yarn

Abstract

The invention relates to a spinning process for a terylene industrial yarn, in particular to a one-step direct spinning process for the terylene industrial yarn, belonging to the field of textile. The process in the invention fills a gap of polyester fiber for a localization continuous solid phase polymerization, spinning and drawing one-step process route production industry, a fluidized bed type pre-crystallizer and a stirring type crystallizer are adopted, a second rotary valve is added to control feeding speed, a third rotary valve is used for separating an air system and a nitrogen system, potential difference is utilized to continuously add material into the pre-crystallizer, slices are crystallized in a continuous fluidized bed pre-crystallizer, the slices crystallized to a set crystallinity is continuously added into the stirring type crystallizer to be further crystallized by utilizing the potential difference, PET (polyethylene terephthalate) slices are heated to a temperature required by solid-phase polymerization in a preheater and then continuously enter into a solid-phase polymerization tower to be subjected to solid-phase polymerization, and the preheating, solid-phase polymerization and drying process are all carried out in a nitrogen medium. The yield is high, the process is simple, and the production is easy to control.

Description

technical field [0001] The invention relates to a textile process of polyester industrial yarn, in particular to a one-step direct spinning process of polyester industrial yarn, which belongs to the textile field. Background technique [0002] Since the United States successfully applied polyester fibers to cords in the 1960s, after more than 40 years of research and development, the application fields of polyester industrial yarns have continued to expand. In 1979, my country began to conduct a two-step polyester industrial yarn production process test. In the late 1980s, the spinning and pulling combined one-step polyester industrial yarn production line was introduced from abroad. According to the statistics of China Chemical Fiber Industry Association, by 2007, there were more than 46 polyester industrial filament production enterprises in my country, with a total production capacity of 467,800 tons, of which more than 17 enterprises imported equipment, and only the top...

AI Technical Summary

Problems solved by technology

The widely used method is the one-step chip spinning method, which is flexible in production, easy to change varieties, easy to manage, and good in product quality, but its high investment is not suitable for widespread promotion