Processing Requirements For PETG Sheets

Processing Requirements For PETG Sheets

Polyethylene terephthalate glycol, known as PETG or PET-G, is a thermoplastic polyester that delivers significant chemical resistance, durability, and formability for manufacturing. HSQY PLASTIC next describes processing requirements for PETG sheets.

1. Sawing
Generally coarse tooth saw blade with fast speed is appropriate. The cutting speed of circular saw should be controlled to 4500rmp, but the speed should be adjusted as high as possible to avoid sheet melting. The sheet should be fixed to reduce vibration, so that the edge of the saw will not be too rough.

Other cutting methods include tools such as scrapers, hand saws, and band saws. The best cutting method depends on the actual situation to determine the cutting tools or methods to improve efficiency.

After the PETG sheet is sawed, its edges must be polished before use, so as to avoid small cracks that may remain after sawing and cause the sheet to crack.

2. Polishing
Mechanical polishing: The edges of the sheet are polished with a mechanical polisher, which should make the edges as flat as possible, pushing through the polished surface with a constant advancing speed.

Flame polishing: Colder flame (such as butane or propane) is used for polishing, whose effect is greatly related to the techniques. More uniform the movement speed will produce better effect.

Solvent polishing: Methylene chloride can be used, spillage should be avoided.

3. Drilling
It is recommended to use a drill bit designed for plastics.

4. Milling
The best milling results can be obtained by using double-slotted straight cuts.

5. Repair
Ordinary heat guns can be used to repair the surface scratch of the PETG clear plastic sheet. You should avoid overheating to prevent partial warping of the sheet, so that you’d better practice on unimportant parts first.

6. Thermoforming
Before thermoforming, the PETG sheet does not need to be pre-dried and can be easily formed with common forming techniques.

7. Bonding
Solvent bonding is more commonly used for bonding the PETG sheet of the same material, such as methyl ethyl ketone, methylene chloride, tetrahydrofuran, Weld-On 7, or RHW-29. Excellent bonding technology and proper setting time will result in a transparent, fog-free, bubble-free, strong, and durable interface.

8. Printing
Mix the paint, tackifier and thinner and use according to the paint manufacturer’s recommendations. Avoid the use of strong solvents such as chlorinated hydrocarbons and methyl ketones when cleaning the surface of PETG sheets.


Post time: Aug-19-2022

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