Production technology of PP strapping, first extruder temperature control, typically 250 ¡æ ~280 ¡æ. Followed by cooling and materials out of the die temperature is very high, to immediately enter the water cooling because of isotactic polypropylene in the chilling circumstances, generate paracrystals structure, molecular structure of paracrystals is loose. Easy stretch orientation, access to quality products. Then stretch, stretch's goal is to improve the longitudinal strength of packing tape, reducing elongation. Tension must be conducted in boiling water, generally use the drawing. Finally, embossing, stretched packing tape two patterned rollers, pressure patterns, its role is to increase friction in the use, without skidding, viewed from the outside nice.
Production Technology Of PP Strapping
- Oct 18, 2016-