| RESIN PROPERTIES |
| |
Method |
Unit |
Typical Value |
| Melt Flow Index |
D1238 |
g/10min |
|
| 190ºC/21.6kg(HLMI) |
|
|
12.5 |
| Density |
D792 |
g/cm³ |
0.948 |
| Melting Temperature |
D3417 |
°F |
260 |
| MECHANICAL PROPERTIES |
| |
Method |
Unit |
Typical Value |
| Tensile Strength at Yield |
D638 |
psi |
3800 |
| Elongation at Break |
D638 |
% |
600 |
| Flexural Modulus |
D790 |
psi |
175000 |
| Notched Izod Impact Strength(73°F) |
D256 |
ft-lb/in |
10 |
| ESCR |
D1693,B |
hrs |
|
| 100%lgepal |
|
|
>600 |
| 10%lgepal |
|
|
120 |
Basic Characteristics: HDPE is an opaque white waxy material, specific gravity is lighter than water, specific gravity is 0.941~0.960, soft and toughness, but it is slightly harder than LDPE, and it is also slightly elongated, non-toxic and odourless.
Combustion characteristics:flammable, can continue to burn after leaving the fire, the upper end of the flame is yellow, the lower end of the blue, combustion will melt, there are liquid drops, no black smoke, at the same time, issued by the paraffin wax burning odour.
Main advantages: Acid and alkali resistance, organic solvent resistance, excellent electrical insulation, low temperature, can still maintain a certain degree of toughness. Surface hardness, tensile strength, rigidity and other mechanical strength are higher than LDPE, close to PP, tough than PP, but the surface finish is not as good as PP.
Main drawbacks: poor mechanical properties, poor air permeability, easy to deform, easy to age, easy to be brittle, brittle than PP, easy stress cracking, low surface hardness, easy to scratch. Difficult to print, when printing, the need for surface discharge treatment, can not be plated, the surface has no luster.
HDPE Application
1 Injection moulding products: crates, bottle caps, barrels, caps, food containers, trays, bins, boxes, and plastic flowers.
2 Blow-moulding products: hollow moulding products, such as various series of blow-moulding barrels, containers, bottles, holding detergents, chemicals, cosmetics, etc., gasoline tanks, daily necessities. There are also blown film products such as food packaging bags, grocery shopping bags, fertiliser lining film.
3 Extruded plastic products: pipes and fittings are mainly used in gas transmission, public water and chemical transmission, such as building materials, drainpipes, gas pipes, hot water pipes, etc.: Sheet is mainly used for seats, suitcases, handling containers and so on.
4 Rotational moulding: injection moulding products such as large containers, storage tanks, barrels, boxes and so on.
5, polyethylene can be processed into film, wire and cable sheathing, tubing, a variety of hollow products, injection moulded products, fibres and so on. Widely used in agriculture, packaging, electrical and electronic, machinery, automobiles, daily necessities and so on.
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