Davies Dupont Teijin Films - Nonfluorinated Backsheets to Increase Recycling_2020-11-11

Mylar UVHPET ™ Sustainability without compromiseDuPont Teijin Films are the polyester based backsheet material with over 45GW of installed capacity relying on the unique set of properties delivered by Mylar UVHPET ™ Our product testing exceeds industry standards and is backed up by the ongoing monitoring of our products in real life applications across the globe. This is all underpinned by over 60 years experience of supplying Mylar into high quality electrical insulation applications and 20 years of ongoing developments supporting the growth in the PV industry. Mylar UVHPET ™ has a significantly lower carbon footprint compared to glass or fluorinated back sheet material, and is halogen free enabling safe end of life recycling. Mylar UHVPET ™ based backsheets Sustainability without compromiseOur approach to sustainability Closed Loop Recycling Performance during product life End of life Feedstock Direction 2008/98/EC; Directive 2021/19/EU; Directive 2000/76/EC report backsheets conclusion, the use of fluoropolymers or halogenated polymers in PV modules should be avoided and alternate PET based or biobased backsheets should be encouraged. inferred that the pyrolysis of fluoropolymers such as TPT, KPK is not a viable option as all the three pyrolysis products pyrolysis gas, pyrolysis oil and pyrolysis char will be contaminated with hazardous halogenated compounds, and thus renders them unuseful for its intended traditional applications without expensive pre-and post-handling fluoropolymers makes it hard to thermally degrade or cost-effectively recycle the polymeric backsheet material present in PV modules. Furthermore, thermal degradation of fluoropolymers leads to toxic release of hydrogen fluorides with amounts experiments, it could be deduced that the incineration products will include toxic contaminants such as hydrogen fluoride HF, fluoralkanes, contaminated particulate he option of typical landfilling also poses an equal risk if the fluoropolymer backsheet material leaches into the atmosphere and contaminates the soil and - free backsheets shows good results compared to the fluorinated backsheet for both incineration and Closed Loop recycling tests PET/PO laminates have been successfully separated using glycolysis based chemical recycling process at pilot scale Trials underway to chemically recycle Mylar UVHPET ™ based backsheet from EoL modules in a closed loop system PET/PE laminate successfully separated with pure bHET suitable for repolymerisation and PO suitable for pyrolysisMylar UVHPET ™ Sustainability without compromise