The case study outlined below includes ONLY the brief summary of its individual
test background and result; please feel free to contact your local dealer if you want
to know more about how TK Series can help your unique plastic processing.

Customer:

anonymous

PVC pipes

PVC

extrusion

Filler Type

CaCO₃

Customer concerns:

mechanical abrasion or wear of the extruder screw and the mixer blades/heads by high % of CaCO₃

1. TK is claimed to prevent the wear of screw thus minimizing the defective rate of extrusion and injection equipment. To test the abrasion effects on screw, the customer simulates a laboratory accelerated abrasion test by mixing in high content of filler CaCO₃ and TiO2 which they know it will surely cause mechanical wearing down.

2. To simulate the screw abrasion, the 2.0 –3.0 inch aluminum discs are dispersed in the formulated compounds using the Papenmeier Laboratory mixer and the weight loss of these discs are measured over 1 and 2 hour intervals and recorded in milligrams (mg). The more weight loss of the aluminum discs denotes the more severe abrasion or mechanical damage to the screw or barrel.

3. Formulated resin/filler compound (% by weight): 

PVC resin                    - 100
SMS 318                     - 2.5
Impact modifier            - 1.5
Ext.Lubricant               - 1.0
Filler                            - 20 to 30
TiO2                            - 2.0

1. significantly less abrasion or wear out when TK additive being used, therefore less cost for equipment overhaul maintenance and longer service life of processing equipment.
2.  customer considers to use higher percentage CaCO₃ to reduce raw material cost