MATERIALS | BIOPLASTICS
Figure 1: Chart showing the effect of the addition of CAI’s ST-PA210 additive on flow of a Luminy grade of PLA
Polymer PLA*
PLA PLA PLA
Additive -
ST-PA210 ST-PA210 ST-PA210
Loading
1% 2% 3%
*Luminy L130 (22 MFI) from TotalEnergies Corbion Source: CAI Performance Additives
based performance additive branded Genioplast. Both enhance the processing and material proper- ties of bioplastics. In addition, Vinnex is said to ensure hassle-free mixing of different biopolyesters and fillers. These latest tests show that the two additives can be readily combined, yielding benefits in optimally adjusted processing and product properties, and improved effectiveness. Biopolyesters can be difficult to process and
require suitable additives to achieve the property profile customary of regular commercial thermo- plastics. Wacker’s applications engineers chose PLA and polybutylene succinate (PBS) as represen-
MFI g/10 min (210°C, 2.16 kg
22 32 51 91
tatives of biodegradable plastics for their screening tests. The additives examined included Vinnex 2504, Vinnex 2525, Genioplast Pellet S and Genioplast Pellet P plus. The engineers observed that Vinnex and Genioplast complement each other in their effects in both filled and unfilled bioplastic systems. When used together, they say they found the processing and performance properties of bioplastics could be optimally adapted to the specific requirements and that the additives were more effective when used in combination than when used separately. Depending on the grade used, Vinnex shows a
particularly positive influence on either polymer melt or mechanical properties. Combined with Vinnex, Genioplast primarily affects surface properties of the plastic item – scratch and abrasion resistance for example – especially in filled systems. In the samples tested, Genioplast acted as a
booster, enhancing the effects achieved with the Vinnex additive. In several cases, the silicone additive also improved properties that Vinnex on its own did not influence. Mechanical properties of the final product are also said to be enhanced by the additive combina-
www.fineblend.com.cn
www.bio-master.com.cn/en/ www.eco-batch.com.cn/en/
service@fineblend.com.cn
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