NEWS
polymer production steps. Firstly, the radical scaven- gers: we have the phenolic antioxidants, the phos- phites, but also the hin- dered amides.” One example she discussed was recycling of HDPE bottles, which often contain traces of PP. “The problem is the PP is degrad- ed much quicker than the PE. So if during recycling we don’t restabilise, we have a drastic loss of stability.” A recycled HDPE 95%/PP
5% material that is not restabilised lasts only 18 days to embrittlement. But BASF tests showed that if it is restabilised, it has 116 days to embrittlement. It often takes a mixture of additives (such as additive packages or blends) to
resulted in more homoge- neous dispersion and fewer defects. Glättli said: “Additives for
Alice Glättli at the BASF Research Press Conference
avoid the decomposition of polymer chains. Preventing yellowing of mechanically recycled PET for drink bottles, for example, can be achieved by combining a primary and secondary antioxidant, she said. To meet the purity challenge in mechanical
recycling, BASF is develop- ing compatibiliser additives that deal with immiscible polymers present in a recycler’s input material. She showed microscope images of a material comprising waste PET bottles recycled with PP caps where the addition of a compatibiliser
stabilisation and the increase of recycling cycles are already part of our portfolio. Just now, we are working around bringing these to the customer and optimising them. With compatibilisers we are still in the screening phase. We are talking about solutions with external partners and customers in order to identify compatibilisers for the recycling market. Thus, step by step, we will build our existing plastic [addi- tives] portfolio and expand it with solutions specifically made for mechanical recycling.” �
www.basf.com
SUPER CLEAN PROCESS PET BOTTLE RECYCLING SYSTEM
IMAGE: BASF
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52
