Introduction to PET plastic
PET plastic raw material, polyethylene terephthalate, is the most important variety of thermoplastic polyester, commonly known as PET or PEIT (hereinafter referred to as PET), commonly known as polyester resin. It is a condensed polymer of terephthalic acid and ethylene glycol, collectively referred to as thermoplastic polyester or saturated polyester along with PBT.
Parameter | Unit | Grade |
|
| PET CZ-302 | PET CZ-333 | PET CZ-318 | PET CZ-328 | PET CZ-5022 |
I.V. | dL/g | 0.80± 0.02 | 0.80 ± 0.02 | 0.83 + 0.02 | 0.85 + 0.02 | 0.64+0.015 |
Crystalinity | % | ≤60 | ≤60 | ≤60 | ≤60 |
|
Content of COOH | mol/t | ≤26 | ≤26 | ≤26 | ≤26 | ≤30 |
Content of acetaldehyde | ppm | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 |
|
Color value | L |
| ≥83 | ≥83 | ≥83 | ≥82 | ≥75 |
B |
| ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | 4.0±2.0 |
Dust content | ppm | ≤ 100 | ≤ 100 | ≤ 100 | ≤ 100 | 30 |
Melting point | ℃ | 243 +2 | 243 +2 | 243 +2 | 243 +2 | 259 +2 |
Wt. of 100 chips % | g | 1.55 + 0.10 | 1.55 + 0.10 | 1.55 + 0.10 | 1.55 + 0.10 |
|
water content | wt% | ≤ 0.2 | ≤ 0.2 | ≤ 0.2 | ≤ 0.2 | ≤ 0.4 |
