Production method of low-size nylon 6 filament
A production method and nylon technology, which can be used in filament/thread forming, single-component polyamide rayon, melt spinning, etc., can solve the problems of unsatisfactory product quality, poor production stability, and low production rate, etc. Achieve the effect of good production stability, high production rate and good product quality
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[0017] The production method of low-denier nylon 6 filament of the present invention, with nylon 6 dry chips as raw material, is made by spinning by melt spinning method; Mainly comprise the following steps:
[0018] 1) Feeding: add nylon 6 dry slices into the silo; the properties of the nylon 6 dry slices are as follows: relative viscosity 2.7±0.05, moisture content lower than 450ppm, hot water extractables content lower than 0.4wt%;
[0019] 2) Preparation of fiber-forming high-polymer melt: Nylon 6 dry chips are prepared into fiber-forming high-polymer melt through the compression section, melting section and metering section (homogenization section) of the extruder;
[0020] The screw extruder adopts: length-to-diameter ratio L / D=28:1, screw diameter 50mm, maximum screw speed 60r / min, extrusion rate 20-50kg / hour; control 10-15 minutes from feeding to melt ;
[0021] 3) Spinning: The molten fiber-forming high-polymer melt is extruded from the spinneret hole of the spinnere...
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