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Processing
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SIDISTAR – Improved Processability in Thermoplastics
Example of “Ball Bearing” Effect in tough to process products.
22.04.2023Developing people - creating value2
Scope of Work
• A tough to extrude PVC WPC product (with wood fibres) was used as a base recipe for the assessment.
• Typically inorganic materials are added to WPC to increase stiffness.
• SIDISTAR was compared to typically used inorganic materials – Talc and Calcium Carbonate.
• Recipes were produced with 6, 12, and 18 % of each inorganic material and extrusion behaviour monitored.
22.04.2023Developing people - creating value3
Talc in WPC
Decking Profile
Recipe :
40% PVC
48% Wood Type 15E
12% Talc
Max 12% Talc was extrudable
However - Extrudate is very rough and dry, internal webs are not fully formed and easily cracked.
22.04.2023Developing people - creating value4
Max 12% CaCO3 was extrudable
However - Extrudate is very rough and dry, internal webs are not fully formed and easily cracked.
CaCO3 in WPC
Decking Profile
Recipe :
40% PVC
48% Wood Type 15E
12% CaCO3
22.04.2023Developing people - creating value5
SIDISTAR in WPCDecking Profile
Recipe :
40% PVC
42% Wood Type 15E
18% Sidistar®
SIDISTAR recipes can be processed at all addition levels - Even at the higher loading of 18% the extrudate is smooth and fully formed.
Sidistar at 6%
Sidistar at 18%
22.04.2023Developing people - creating value6
Conclusion
• In high viscosity – tough to extrude products SIDISTAR can improve processability ensuring a fully formed and smooth part.
• The “ball bearing” effect creates an easier to process melt.
• In comparison to other inorganic products the SIDISTAR particle shape and ability to be dispersed to primary particles is key to this processing improvement.