High density polyethylene (HDPE) is an opaque white waxy material with a specific gravity of 0.941~0.960, lighter than water. It is soft and ductile, but slightly harder and elongated than LDPE. It is non-toxic and odorless.
[Combustion characteristics]
Flammable, can continue to burn after leaving the fire, the upper end of the flame is yellow, the lower end is blue, the combustion will melt, there is liquid dripping, no black smoke, at the same time, issued when the smell of paraffin combustion.
[ Main advantages ]
Acid and alkali resistance, organic solvent resistance, excellent electrical insulation, low temperature, can still maintain a certain toughness. The surface hardness, tensile strength, rigidity and other mechanical strength are higher than LDPE, close to PP, tougher than PP, but the surface finish is not as good as PP.
Performance of the project
Test condition [condition]
The test method
The test data
The data unit
Basic performance
The density of
GB/T1033-86
Quality indicators|≥0.950-0.952
g/cm3
GB/T1033-86
The inspection results|0.955
g/cm3
Melt mass flow rate
21.6kg
GB/T 3682-2000
Quality indicators|6.2-10.2
g/10min
21.6kg
GB/T 3682-2000
The inspection results|7.6
g/10min
Mechanical properties of
Tensile yield strength
GB/T 1040-92
Quality indicators|≥20.0
Mpa
GB/T 1040-92
The inspection results|28.2
Mpa
Tensile breaking strength
GB/T 1040-92
Quality indicators|≥10
Mpa
GB/T 1040-92
The inspection results|13.1
Mpa
Elongation at break
GB/T 1040-92
Quality indicators|≥140
%
GB/T 1040-92
The inspection results|572
%
Other performance
Color chip
SH/T 1541-93
Quality indicators|≤20
a/kg
SH/T 1541-93
The inspection results|8
a/kg
impurities
SH/T 1541-93
Quality indicators|≤60
a/kg
[ Application ]
Used for extruding packaging film, rope, woven bag, fishing net, water pipe; Low-grade daily necessities and shell injection molding, non-load-bearing components, plastic boxes, turnover boxes; Extrusion blow molding containers, hollow products, bottles.
[Injection molding process]
There are countless applications for HDPE, ranging from reusable thin-walled beverage cups to 5-GSL cans that consume one-fifth of domestically produced HDPE. General melt index of injection grade is 5 ~ 10, and there are low fluidity grade with toughness and high fluidity grade with machinability. Uses include daily necessities and food thin-walled packaging; Tough, durable cans of food and paint; High resistance to environmental stress cracking applications such as small engine fuel tanks and 90-Gal waste tanks.
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