W i t h
PA L - G PA L - G U V
P E T G S h e e t s
This brochure describes methods for handling and processing PALGLAZE SHEETS. The data is based on experience aquired by Palram Industries and other end users of PALGLAZE SHEETS. This information, while accurate to the best of our knowledge, should be regarded as a recommendation only, and no liability for theconsequences of its use will be accepted by Palram Industries.
C O N T E N T S
A. Introduction B. Fabrication 1. Machining Guidelines 2. Drilling 3. Tapping 4. Milling 5. Sawing 6. Shearing and Punching 7 . Die Cutting 8. Laser Cutting 9. Routing C. Forming 7 1. Cold Bending 2. Thermoforming 3. Heating before Thermoforming 4. Hot Bending 5. Straight Vacuum Forming 6. Drape Forming 7 . Matched-MoldForming 8. Pressure-Bubble Plug-Assist Vacuum Forming 9. Plug-Assist Pressure Forming 10. Plug-Assist Vacuum Forming 11. Vacuum Snap-Back Forming 12. Pressure-Bubble Vacuum Snap-Back Forming 13. Trapped-Sheet Contact-Heat Pressure Forming 14. Free Forming 15. Mechanical Forming D. Assembly 1. Assembly Guidelines 2. Bonding Techniques: Solvents, Cements, and Adhesives 3. Mechanical Fastening E.Finishing 22 1. Sanding 2. Joining 3. Ashing, Buffing, and Polishing 4. Filing 5. Flame Polishing and Scratch Removal 6. Solvent Polishing 7 . Hot Stamping 8. Printing 9. Painting 10. Cleaning F. Chemical Resistance Appendix: Physical Properties Appendix 2: Special considerations when Thermoforming Palglaze UV 1 1 1 1 2 2 2 3 4 6 6 7 7 7 8 8 10 11 11 13 14 15 15 16 18 18 19 19 19 21 22 22 22 22 23 2323 23 24 24 25 28 29
I n t r o d u c t i o n
The manufacture of plastic articles from PALGLAZE flat sheet normally involves secondary fabrication operations, including sawing, drilling, bending, decorating, and assembling. This pamphlet covers the properties and characteristics of PALGLAZE which need to be taken into account if these secondary operations are to be performedsuccessfully. For your reference, the properties of a typical 3 mm (0.12 in.) sheet are listed in the Appendix at the end of this pamphlet (page 28). In non-thermoforming applications, the masking film should only be removed after fabrication and installation is completed. In general, it is possible to carry out all thermoforming fabricating procedures, including hot bending and vacuum forming, with themasking in place. It is imperative to indicate that you intend to carry out a procedure which entails heating the sheet, when ordering PALGLAZE. This will enable you to receive masking with markings placed on the edges (or without markings if so required). If there are markings, then it is necessary to remove the masking prior to heating. In this case , it is necessary to verify that the surfaces areclean before processing. In any case, it is absolutely necessary to carry out a trial on a sample sheet from each production batch to verify that it is possible to heat and/or thermoform the sheet without removing the masking.
F a b r i c a t i o n
1. Machining Guidelines
PALGLAZE SHEET can be worked with most tools used for machining wood or metal. Tool speeds should be adjusted sothat the plastic sheet does not melt from frictional heat. In general, the highest speed at which overheating of the tool or plastic does not occur, will give the best results. It is important to keep cutting tools sharp at all times. Hard, wearresistant tools with greater cutting clearances than those used for cutting metal are suggested. High-speed or carbon-tipped tools are efficient for longruns and provide accuracy and uniformity of finish. Since plastics are poor heat conductors, the heat generated by machining operations must be absorbed by the tool and carried away by a coolant. A jet of air directed on the cutting edge aids in cooling the tool and in removing chips. Plain or soapy water is sometimes used for cooling unless the trim scrap is to be reused.