Extruder plastic melting point of melt-blown cloth machine

The length of the compression section is mainly related to the melting point and other properties of the plastic. Plastics with a wide melting temperature range, such as polyvinyl chloride starting to melt above 150 ℃, the longest compression section, up to 100% of the total length of the screw (gradient type), polyethylene with a narrow melting temperature range (low density polyethylene 105 ~ 120 ℃) , High-density polyethylene 125 ~ 135 ℃), etc., the compression section is 45 ~ 50% of the total length of the screw; most polymers such as polyamides with a narrow melting temperature range, the compression section even has only one pitch length.