Method for preparing super-thick denier polyester monofilament

Abstract

The invention discloses a method for preparing super-thick denier polyester monofilament, which comprises the following steps: polyester melt, booster pump, melt transmitting pipeline, spinning tank body, metering pump, spinning assembly, spinning side blowing, oiling, drafting for typing and winding, wherein, in the step of spinning side blowing, air-conditioning air blown from a side blowing air-conditioner is re-cooled, and the parameters of the side blowing after re-cooling are controlled as follows: temperature is 17 DEG C to 19 DEG C, the humidity is 75% to 90%, the wind speed is 0.7m / s to 0.9m / s; in the step of oiling, filament after side blowing and re-cooling is oiled and cooled two times, and the total oiling rate of the filament is controlled to be 0.7 to 0.9%; the oiling parameters for the first time are as follow: the oiling rate is 0.2% to 0.3%, and the oil concentration is 13% to 18%; the oiling parameters for the second time are as follows: the oiling rate is 0.5% to 0.6%, and the oil concentration is 18% to 22%. The method can be used for producing conventional FDY products and super-thick denier master monofilament at the same time.

Description

technical field [0001] The invention relates to a production process of chemical fiber spinning, in particular to a preparation method of super coarse denier polyester monofilament. Background technique [0002] Polyester filaments with a monofilament fineness above 10D are widely used in civilian applications such as wedding dresses, evening dresses, curtains, gold and silver threads, knitted fabrics, warp-knitted fabrics, weft-knitted fabrics, and industrial printing screens, paper screens, Ribbon, filter material, conveyor belt, pipe network weaving, etc. Most of the traditional polyester monofilament production is done by conventional spinning process, and the production speed is 600-900m / min. The monofilament produced by this method has low efficiency and uneven dyeing performance, which cannot fully meet the needs of the market. Adopting FDY high-speed one-step spinning process, the production speed can reach more than 4000m / min, which not only improves the production...

AI Technical Summary

Problems solved by technology

[0003] Using the existing FDY equipment to produce polyester filaments with a monofilament fineness below 20D, it can be spun by increasing the side blowing air volume to enhance the cooling effect and appropriately reducing the spinning speed; The drafting and setting temperature is difficult to meet the requirements, the quality of the produced products is unstable, and there are many end breaks. In severe cases, normal production cannot be performed.

[0004] Due to the needs of production, for example, when the order of ultra-coarse denier polyester monofilament is small or the demand is more urgent, the company hopes to open up a part of the production line as ultra-coarse denier polyester monofilament production when producing conventional FDY products, but due to Existing FDY equipment is usually not enough to meet the needs of ultra-coarse denier polyester monofilaments. In addition, even if the process requirements of coarse denier polyester monofilaments are met by increasing wind speed and reducing wind temperature, when producing at the same time as conventional FDY products , the operating parameters of monofilament production have an impact on the product quality of conventional FDY, and at the same time consume a lot of energy, which increases production costs

Therefore, in the current chemical fiber enterprises, the ultra-coarse denier polyester monofilament can only be produced separately

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