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The dried polyethylene particles into the hopper, by the weight of the particle itself from the hopper into the screw, when the pellets and screw thread oblique edge contact, the rotation of the oblique edge face plastic and slant edge perpendicular to the surface of the thrust, the plastic particles goes forward, progresses, because the plastic material with screw, machine and plastic tube between friction and inter particle collision and friction, also due to the external cylinder heating gradually melted.

When the membrane vesicles filed in normal operation after, should immediately check the membrane thickness, width, plasticizing quality, vertical and horizontal contraction rate, various machine parts tie to be adjusted, mainframe extrusion speed and traction speed and fan speed should be adjusted to specified requirements, to keep it consistent.