Apr 19, 2023 S.Movchan Straw manufacturing and QC 1

Remove metallization from tape by laser. Part 2

• laser mode optimization for Hostaphane RNK 2600• samples for Molinex 406 (for laser optimal mode)• Hostaphane RNK 4600: spool #17 and spool #18• conclusion

Presented by S.Movchan

Apr 19, 2023 S.Movchan Straw manufacturing and QC 2

Laser mode optimization for Hostaphane RNK 2600

Goal of optimization: Remove metallization and to do min PET irradiation

Laser graver parameters:- laser power

- laser pulses frequency- lines per mm

- laser beam scan speed

Optimization to do for stopped tape (speed v=0 mm/sec)

Total: 21 samples

Apr 19, 2023 S.Movchan Straw manufacturing and QC 3

Laser power:

W=20% W=30% W=40%

P=20%, 40 kHz, beam scan speed -200 mm/sec, 20 lines/mm

Zoom x 200

Apr 19, 2023 S.Movchan Straw manufacturing and QC 4

Laser pulses frequency:

P=20%, 20 kHz, beam scan speed -200 mm/sec, 20 lines/mm

20 kHz 40 kHz

Zoom x 200

Apr 19, 2023 S.Movchan Straw manufacturing and QC 5

Laser beam lines per mm:

20 lines/mm 40 lines/mm 60 lines/mm

P=20%, 20 kHz, beam scan speed -200 mm/sec, 20 lines/mm

Zoom x 200

Apr 19, 2023 S.Movchan Straw manufacturing and QC 6

Laser beam scan speed:

P=20%, 20 kHz, beam scan speed -200 mm/sec, 20 lines/mm

200 mm/sec 600 mm/sec

1000 mm/sec400 mm/sec

Zoom x 200

Apr 19, 2023 S.Movchan Straw manufacturing and QC 7

RNK 2600, extra power: (zoom x200)

Po: W=30%, 40 kHz, beam scan speed -200 mm/sec

40 lines per mm

60 lines per mm

Apr 19, 2023 S.Movchan Straw manufacturing and QC 8

Molinex 406, extra power:

Zoom x 200

Apr 19, 2023 S.Movchan Straw manufacturing and QC 9

Laser optimal mode for non moving tape:

W=30%

Tape speed: 0 mm/sec

Summary:Power: W=(30-40)%Frequency: F=40 kHzBeam speed: (600-1000) mm/secBeam focus: focused (D=50 µm)Lines/mm: 40Scan type : by line

W=40%

Zoom x 200

Apr 19, 2023 S.Movchan Straw manufacturing and QC 10

RNK 2600, laser optimal mode + circle+:

Scan line speed – 46 mm/sec

Zoom x 200

Apr 19, 2023 S.Movchan Straw manufacturing and QC 11

Molinex 406, laser optimal mode + circle:

Scan line speed – 46 mm/sec

Zoom x 200

Apr 19, 2023 S.Movchan Straw manufacturing and QC 12

Laser optimal modes:

Moving tapeSummary:

Power: W=40%Frequency: F=40 kHzBeam speed: 6000 mm/secBeam non focus: + 2 mmScan type: by circle with D=0.4 mmTape speed: 46 mm/sec

Max manufacture speed: 46 mm/sec

Non moving tape Summary:

Power: W=(30-40)%Frequency: F=40 kHzBeam speed: (600-1000) mm/secBeam focus: focused (D=50 µm)Lines/mm: 40Scan type: by lineTape speed: 0 mm/sec

Manufacture speed: (10-46) mm/sec

Apr 19, 2023 S.Movchan Straw manufacturing and QC 13

Spool #17 (RNK 4600): remove metallization from both tape edges

Tape edge: W=0.4 mm

Tape width:W=31.4 mm

Zoom x 200

Apr 19, 2023 S.Movchan Straw manufacturing and QC 14

Spool #18 (RNK 4600): remove metallization from one tape edge

L=1.5 m L=1.5 m

Zoom x 200

Apr 19, 2023 S.Movchan Straw manufacturing and QC 15

Conclusion

Laser type: solid, wave ~ 1 µm Nominal laser power: P=20 WBeam effective diameter: about 60 µm (nominal - 50 µm)

Optimal operation mode (minimum power for metal removing):Laser effective power: (4-5) WLaser beam frequency: F=40 kHzN laser pulses per point: 1 pulse

Beam scan speed: ≤ 6000 mm/sec Beam non focus: + 2 mm Scan type: by circle with D=0.4 mm

Line speed of metal removing: up to 50 mm/sec

Laser beam melt base material (PET) at power about (8-10) W

2 spools (20 meters) ready for manufacture test straws

Apr 19, 2023 S.Movchan Straw manufacturing and QC 16

New straws:

Hostaphan RNK 4600, Cu+Au

Straws fabricate for tests:# 3684 – no metallization on one tape side # 3685 – no metallization on both tape sides # 3686 – no metallization on both tape sides # 3687 – no metallization on both tape sides

Apr 19, 2023 S.Movchan Straw manufacturing and QC 17

Straw #3685:

F=(6.0±0.5) kg

dL= (11÷22) mm

Apr 19, 2023 S.Movchan Straw manufacturing and QC 18

Conclusion

2 types of test straws fabricated (from Hostaphan RNK 4600): - metallization removed from one tape edge (straw #3684) - metallization removed from both tape edges (straw # (3685-3687))

Straw tensile test results:Straw #3685:

F=(6.0±0.5) kgdL=(11÷22) mm

for old straws: F=(3.5-6) kg, dL=(1-10) mm, non stable results

Gas leak tests – in progress