Data for PET
| Density | 1.37 | Grams/ CubicCentimeter |
| UTS | 9.4 | Kpsi |
| Hardness | - | - |
| Glass transition | 75 | C |
| Melting | 260 | C |
| Boiling | - | C |
| Ignite | - | C |
| Price point | $7.52 / foot | 3/4" x 12" cast round, smallparts PER-0250-06-01 |
| Recycle | 1 |
History/Interest
Patented in 1941 by Calico Printers' Association
PET bottle introduced in 1973
Properties
Can be amorphous (transparent) or semi-crystalline (trans. or semi-opaque)
Excellent wear resistance
No porosity, low absorption
Low friction, high flexural modulus, superior dimensional stability
Good gas/moisture barrier (bottled drinks, sodas)
To form amorphous, have to cool quickly so they can’t arrange into crystals
Uses
Synthetic fibers ”Polyester“ (60%)
Thin film ”Mylar“
Solid
- Food/Beverage/Liquid Containters (30%)
- Only when crystallized can it be microwavable
- Printing Inks
- Water Purification Products
Recycled: synthetic fibers, polar fleece, etc.
Manufacturing
Good thermoforming
Making bottles - 2 step (test-tube ”preform“ w/ threads - then blow) and 1 step blow-molding
Trivia - some candy containers made from preforms