Microscopic Observations and Tensile Tests of the straws - Optical microscope observations - SEM observations - Tensile tests results Presented by M. Scheubel EN/MME-MM 18-October M. Scheubel - Microscopic Observations and Tensile Tests of the straws

Longitudinal scratches and transversal marks on PET film received from Putzfolien Optical microscope observations 18-October-2010 M. Scheubel - Microscopic Observations and Tensile Tests of the straws 2

18-October-2010 SEM observations of the coatings 3 Melinex 406: Orientation Hostaphan RNK 2600: Homogeneous

SEFAR welding Optical microscope observations 18-October-2010 M. Scheubel - Microscopic Observations and Tensile Tests of the straws 4 Hostaphan RNK 2600Melinex <Overlap<800 µm 288<welding<451 µm

SEFAR welding Optical microscope observations 18-October-2010 M. Scheubel - Microscopic Observations and Tensile Tests of the straws 5 Hostaphan RNK 2600Melinex 406

SEFAR welding: not well-centered within the overlap area SEM observations 18-October-2010 M. Scheubel - Microscopic Observations and Tensile Tests of the straws 6 Hostaphan RNK 2600Melinex 406 End of inside Tilt=60° Scratch

Tensile tests 18-October-2010 M. Scheubel - Microscopic Observations and Tensile Tests of the straws 7

Tensile tests 18-October-2010 M. Scheubel - Microscopic Observations and Tensile Tests of the straws 8 Sample Average Load max (N) Standard Deviation Average Tensile strength (MPa) Standard Deviation Breakage point Excell-XG532-uncoated-welded34.9/93.8/weld Hostaphan-GN nmCu20nmAu-SEFAR welded weld Hostaphan-GN nmCu20nmAu-JINR welded weld Excell-XG532-50nmCu20nmAu-welded weld Excell-XG nmCu20nmAu-welded weld Hostaphan-GN4600-uncoated-welded in the grips Hostaphan-GN4600-uncoated-unwelded in the grips Hostaphan-GN nmCu20nmAu-unwelded in the grips UNKNOWN (Hostaphan-RNK2600) uncoated-unwelded in the grips Excell-XG532-uncoated-unwelded in the grips Hostaphan-RNK2600-uncoated-unwelded in the grips Hostaphan-RNK nmCu20nmAu-SEFAR welded weld Melinex-406-uncoated-unwelded/Roll in the grips Melinex nmCu20nmAu-SEFAR welded weld Melinex nmCu20nmAu-SEFAR welded/Straw # weld

Tensile tests 18-October-2010 M. Scheubel - Microscopic Observations and Tensile Tests of the straws 9 Hostaphan RNK 2600 unwelded Hostaphan RNK 2600 welded Melinex 406 welded

Conclusions Material: – Marks and scratches  investigations in progress suppliers – Uniform coatings Welding: – Too small  SEFAR to improve weld width – Not well-centered in the overlap  SEFAR to correct Tensile tests: – SEFAR Melinex straws good weld quality – Melinex 406 better weld quality than Hostaphan RNK 2600  SEFAR to investigate. 18-October-2010 M. Scheubel - Microscopic Observations and Tensile Tests of the straws 10