| |
Polyethylene (PE)
 
- Low Molecular weight – LDPE (918-935
Kg/m3) linear with branches and HDPE
(linear)
- LDPE – flexible, tough, good chemical
resistance (60% cryst.)
- HDPE – stronger, stiffer, (90% cryst).
- LDPE – films, sheeting, bags, pen tube,
wire & cable insulation, shrink wrapping
- HDPE – piping, toys, carrier bag
- Stabilization by butyl rubber and Glass
Fiber
- Products based on HDPE and LDPE are indicated by the following icons.
 
Polyethylene Terepthalate (PET) 
- A thermoplastic* polymer made of ethylene glycol and
terephthalic acid or dimethylterephthalate.
- Tg around 750 C, semi crystalline to amorphous
- Good transparency
- Heat resistance due to high heat deflection
temperature
- Very low gas permeability and water vapor
transmittance
- Excellent chemical resistance and anti-hydrolysis
characteristics
- Zero flavor adsorption
- Blockage of ultraviolet-rays provides good protection
for contents
- Recycling Possible
Application of PET and PP
PET and PPs are mostly used as containers and storage boxes. 
|
