HDPE, what is it and what can it do for you?
HDPE, or high density polyethylene film, is a linear polymer prepared from ethylene by a catalytic process. High density polyethylene is just that, a high density closely packed structure with a somewhat higher chemical structure than low density polyethylene (LDPE).
So why choose HDPE?
The advantages alone can answer why. HDPE is an extremely versatile material with advantages such as the non-blocking characteristics in addition to added stiffness, impact and wear resistance, flexibility, chemical resistance, food contact acceptability, processability, and toughness. Another benefit of HDPE is that it is harder, more opaque, and can withstand rather higher temperatures than LDPE. HDPE also has advantages in many machine applications such as Pearson’s automated insertion machines, OK International’s packaging automation systems, and K&R’spolybag inserter systems. These machines place the bags in cases or shipping containers with even cuffs around the flaps.
With LDPE blocking can occur, which stops production and causes downtime, neither of which you want on high-speed packaging lines. However, HDPE homopolymer resins are linear in nature and these HDPE resins exhibit hard, slippery surfaces that resist blocking. Therefore, with HDPE you don’t have stops in production or downtime.The bottom line is that bag inserter lines love HDPE’s non blocking, stiffer film characteristics. And for an added benefit, HDPE has a lower moisture and oxygen transmission rate, which allows for longer product freshness.
If you weren’t aware of high density polyethylene (HDPE) and its advantages before, I bet you’re glad you are now.
Bag inserter line