The difference between LDPE and HDPE

- Jul 04, 2018 -

The difference between HDPE and LDPE is:

HDPE:

HDPE, this plastic raw material is generally opaque. After biting with a tooth, there will be white scars appearing at the crack. It is relatively brittle and hard, and it is used for packaging products.

LDPE:

LDPE is soft, has good toughness, good transparency, and is relatively smooth to the touch.

The difference between HDPE and LDPE uses:

HDPE:

HDPE can be used for drawing, injection molding, hollow and blown film grades. Its relative plastic products are: fishing nets, barrels, Wahaha bottles and bags.

LDPE:

LDPE plastics are generally used for film products, and are generally used in industrial films, mulch films, agricultural films, and the like.

The difference between HDPE and LDPE physical performance:

Common points: in terms of odor and toxicity, they are non-toxic, tasteless and odorless. Fortunately, he is both non-toxic and harmless to the body. Plastics can put a hundred hearts.

The difference between HDPE and LDPE mechanical properties:

HDPE has high strength, good toughness, strong rigidity, close to PP, and is tougher than PP. Uses for extrusion packaging film, ropes, woven bags, fishing nets, water pipes; for injection molding low-grade daily necessities and casings, non-load bearing components, plastic boxes, turnover boxes; for extrusion blow molding containers, hollow products, bottles. The mechanical properties of LDPE are relatively poor.

Difference between heat and cold resistance:

It has good heat resistance and cold resistance. It is excellent at normal temperature even at -40F low temperature. It has excellent impact resistance, low temperature embrittlement temperature < -90 °C, low heat resistance, low temperature embrittlement temperature <-70 °C

The difference between HDPE and LDPE softening point:

HDPE: 125-135 ° C,

LDPE: 90-100

Acid, alkali, corrosion, organic solvent performance difference:

HDPE:

Resistant to strong oxidant corrosion; acid, alkali and various salt corrosion; insoluble in any organic solvent, etc.

LDPE

Corrosion resistant to acid, alkali and salt solutions, but poor solvent resistance