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May 22, 2012 · problem: pe film made with a low blowup ratio can be weak and exhibit the dreaded straight line tear which results from too much orientation in the machine ( md ) direction. while the textbook happy spot is a blowup ratio of 2:1 ( bubble diameter = twice die diameter ), this is not always possible in the real world.
Now, the shaping die is basically a piece of steel (mold) with the same dimensions and shape as the finished product. as the plastic sheet leaves the shaping die, it has the right shape. its thickness is set by the mouth of extrusion die. this means you can adjust the thickness of the sheet. generally, the extrusion die can make a 1-8mm sheet.
Mar 24, 2004 · gels are a common quality problem in extrusion of clear film and tubing less than 0.005 in. thick. ... what's causing your gels? ... the right finish improves film or sheet quality and raises output. yet most processors don't know how to measure surface roughness or to specify it properly.
This pelletizing extruder has special screw design and different configuration, it is suitable for the recycling and pelletizing of raw materials such as pp, pe, pet, ps, pa, pa66 and the pelletizing of the raw materials with different colors.

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