La description
Polyethylene (PE) PE is the most
widely used polyolefin in the world by volume.
There are three types of PE, High Density Polyethylene (HDPE), Low
Density Polyethylene (LDPE) and Linear Low Density Polyethylene
(LLDPE), in more than *0 grades in total.
High-density polyethylene HDPE
High density polyethylene (HDPE) is a thermoplastic made from oil.
HDPE is resistant to many different solvents and is often used in
food containers (certain tupperwares, containers for milk, liquid
laundry detergent, etc.), some plastic bags, and containment of
certain chemicals, chemical resistant piping systems, and
geothermal heat transfer piping systems.
Linear low density polyethylene
LLDPEÂ
LLDPE has higher tensile strength and higher impact and puncture
resistance than LDPE. It can be used to make thinner films, with
better environmental stress cracking resistance. It has good
resistance to chemicals and to ultraviolet radiation. It has good
electrical properties. However it is not as easy to process as
LDPE, has lower gloss, and narrower range for heat sealing.
It is used for plastic bags and sheets (where it allows using lower
thickness than comparable LDPE), plastic wrap, toys, lids, pipes,
buckets and containers, covering of cables, geomembranes, and
mainly for flexible tubing.
Medium-density polyethylene
(MDPE)
MDPE has good shock and drop resistance properties. It also is less
notch sensitive than HDPE, stress cracking resistance is better
than HDPE. MDPE is typically used in gas pipes and fittings, sacks,
shrink film, packaging film, carrier bags and screw closures.
Low-density polyethylene (LDPE)
LDPE has resistant to impact (doesnt break easily), moisture (water
proof), and chemicals (can stand up to many hazardous materials).
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