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(1) melt agglomeration process waste - the choice of materials and washing - dry - cut strips - high speed pellet (feed - Shrink - water - aggregate) out of the packaging material. (2), extrusion granulation waste - the choice of materials - washing - dry - cut strips - heating --- cooling extrusion pelletizing - packaging. Extrusion equipment used is made from two extruders, to exclude waste gas generated in the extrusion, can also be vented extruder. To exclude waste debris, at the discharge end of the extruder must be 80-120 mesh screen. 2, the use of recycled materials and the impact on performance due to thermal bags pp plastic working is influential on the performance of aging, particularly recovery "" bags after two or even several times the thermal process while in use plus prior to recovery UV aging, performance has decreased significantly. 3, the use of recycled materials to adjust the drawing process due to multiple plastic pp thermal processing to produce heat aging and long-term use of ultraviolet radiation aging, resulting in pp regrind melt index increased with the number of processing times increases. Therefore, a large number of the new compound was added recycled materials, in the control process temperature, relatively new material, extruder temperature, head temperature, stretching temperature setting should be appropriately reduced, the amount shall be adjusted by testing new and old Mixture melt index is determined. On the other hand, since the material recovered after several processing, molecular weight reduction, a large number of short-molecular chain exists, and after several stretch orientation. Therefore, in the production process, but also draw ratio compared with the same kinds of new materials down. The new material generally draw ratio 4--5 times, usually 3 - 4 times after the addition of 40% recycled material. Also due to the increase of the recycled material melt index, decreased viscosity, the extrusion rate increased, so that at the same screw speed and temperature conditions, the drawing-off speed should be slightly faster. In the old and new material compounding, it is worth noting that for a mixed; while the melt index of raw materials should be chosen to match similar. Melt index big difference, big difference between the melting temperature. In plastics extrusion, the two materials can not be plasticized, will seriously affect the speed extrusion stretch, resulting in rejection rate.
Factory price in Custom Plastic Water Bottle, Plastic Bottle Cap Manufacturers contact us at www.plastic-bottle-manufacturers.com
Factory price in Custom Plastic Water Bottle, Plastic Bottle Cap Manufacturers contact us at www.plastic-bottle-manufacturers.com
