Special spray head structure applied to nanofiber melt-blowing preparation

Abstract

The invention provides a special spray head structure applied to nanofiber melt-blowing preparation. The special spray head structure comprises a storage barrel, a discharge pipe, a capillary tube, aheating block, a vent pipe, first base bodies, airflow inlet pipes, flow guide pipes and second base bodies, wherein the discharge pipe is arranged at the bottom end of the storage barrel; the capillary tube is arranged at the bottom end of the discharge pipe; the heating block is arranged at the bottom end of the storage barrel; the vent pipe is arranged on the outer side of the capillary tube; the first base bodies are arranged on two sides of the outer wall of the vent pipe; the airflow inlet pipes are arranged on two sides of the first base bodies; the flow guide pipes are obliquely arranged on one sides of the bottom ends of the airflow inlet pipes; and the top surfaces of the second base bodies are assembled on the bottom surfaces of the first base bodies and are fixedly arranged. According to the special spray head structure disclosed by the invention, fibers are pulled twice, and the fibers are high in uniformity and high in quality; and moreover, the fiber bundle breakage phenomenon is effectively avoided in the pulling process, and the production stability of the device is high.

Description

technical field [0001] The invention relates to the field of melt-blown textiles, in particular to a special spray head structure applied to the preparation of nanofiber melt-blown. Background technique [0002] The preparation of nanofibers is carried out by the melt-blowing method, which is a spinning method in which the freshly extruded polymer melt is rapidly stretched and solidified by high-speed hot air flow. The advantage is that the process flow is short, and it can be directly made into non-woven fabrics by spinning. The process principle of the melt-blown method is that the polymer masterbatch is put into the extruder and melted in the extruder at a temperature of about 240°C. The melt reaches the melt-blown die head through the metering pump, and the metering pump measures the output to the nozzle. melt flow. The nozzle is a row of capillary tubes with a pitch of less than 1 mm and a diameter of 0.2 to 0.4 mm. On both sides of the capillary is the air inlet, wh...

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Problems solved by technology

[0003] In the nozzle structure of the existing melt-blown method, the air inlets on both sides of the capillary are usually single-hole structures, and only one set of air inlets is used to pull the fiber bundle at the nozzle once. The uniformity of the fibers after pulling low, the strength of a single fiber is low, and the preparation quality of the fiber web is not high; in addition, the existing nozzle structure also has two groups of air inlets on both sides of the wool tube, but the nozzle structure performs two consecutive steps in the same direction on the fiber bundle. Stretching and pulling, the strength of individual fibers is enhanced, and at the same time, it is easy to cause fiber bundles to break when pulled, resulting in low stability of the production device

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