LDPE is low density polyethylene, which is a plastic material. HDPE is high-density polyethylene, a highly crystalline, non-polar thermoplastic resin.
The appearance difference between LDPE and HDPE:
HDPE is generally opaque, and after biting with teeth, white stubble marks will appear at the crack. The material is relatively brittle and hard, and there are many products used for packaging.
LDPE is softer, has better toughness, better transparency, smoother hand feel, and less sound when torn by hand.
The difference between the use of LDPE and HDPE:
HDPE can be made of wire drawing, injection molding, hollow and blow molding products. Its relative plastic products are: fishing nets, barrels, beverage bottles and packaging bags.
LDPE plastics are generally used in film products, generally used in industrial films, mulching films, agricultural films, etc. The common point of their physical properties is that they are non-toxic, tasteless and odorless in terms of odor and toxicity.
HDPE has high strength, good toughness and strong rigidity, close to pp but better toughness than PP. Mainly used for extrusion packaging films, ropes, woven bags, fishing nets, water pipes. The mechanical properties of LDPE are relatively poor.
The difference between the softening point of LDPE and HDPE:
HDPE is 125-135c, LDPE is 90-100c.
Their acid, alkali, corrosion, organic solvent performance difference.
HDPE is resistant to strong oxidant corrosion, acid, alkali and various salt corrosion. Insoluble with any organic solvent, etc.
LDPE is resistant to acid and alkali, and salt solution corrosion. and poor solubility.
These are the differences between them
Post time: Aug-17-2022