Monofilament extrusion is based on LDPE, HDPE, LLDPE, PP, and the like. Although the raw materials are different, the production process and production equipment are basically the same. They are extruded through the small holes of the machine head after extrusion and plasticizing, and are formed by high-fold stretching after preliminary cooling and setting.
Due to the different extrusion processes of various resins, the heat resistance should be considered when selecting a color. Because the diameter of the monofilament is relatively small, the strength requirement is relatively high. Moreover, in the application of fishing net wire and rope, the weather resistance of the masterbatch is required to be higher. To this end, the effect of masterbatch on the mechanical properties and weatherability of various types of silk should be closely watched.
What problems will occur in monofilament production, and how can it be solved?
Problem 1: More broken ends at the spinneret
Cause: The pigment particles in the masterbatch are coarse and there are impurities in the raw material.
Solution: 1 monofilament production process: strengthen the filter, exchange raw materials. 2 masterbatch: Enhance the dispersion of masterbatch pigments and choose pigments that are easy to disperse.
Question 2: The hot drafting tank is interrupted by many heads
Cause: The masterbatch contains impurities, the masterbatch pigment decomposes, and the draw ratio is too high.
Solution: 1 monofilament production process: reduce the stretching speed. 2 masterbatch: Enhance the filtration in the production of masterbatch and choose a pigment with good heat resistance.
Question 3: There are bubbles on the surface of the monofilament
Cause: The masterbatch contains too much water and the extrusion temperature is too high.
Solution: 1 monofilament production process: reduce the extrusion temperature. 2 masterbatch: Strengthen the masterbatch to dry.
Question 4: Monofilament has bamboo silk
Cause: Masterbatch pigment particles large filter.
Solution: 1 monofilament production process: change the filter. 2 masterbatch: Enhance the dispersion of masterbatch.