Most commonly used extrusion blow-molded products are blow-molded with HDPE plastics, and HDPE is usually the main raw material for blow-molded containers. HDPE’s physical and mechanical properties directly determine the quality of blow-molded products.
The following are the common ratios of 4 common HDPE blow-molded products, for reference by those who need it.
HDPE is the main raw material for blow-molded containers. Generally, for a specific extrusion blow-molded product, only one or two plastic raw materials are needed for blow molding, and a relatively good quality level can be achieved.
The performance of HDPE mainly depends on three factors: its density, relative molecular mass, and relative molecular mass distribution.
The higher the density, the higher the rigidity and hardness of the product, and the stronger the chemical corrosion resistance;
The higher the relative molecular mass, the slower the polymer flows, and the better the toughness and environmental stress cracking resistance;
The width of the relative molecular mass distribution will directly affect the speed of polymer flow.
Some HDPE have excellent physical and mechanical properties. When it enters the high-speed blow molding production line for processing, the mechanical properties and environmental stress resistance parameters of the products produced often change greatly. The trend of some important mechanical parameters deteriorating affects the normal performance of the product performance.
The following are the common ratios of common HDPE blow-molded products.
25L plastic barrel formula
| Resin name | Resin model | MI | Relative density | Ratio mass % |
| HDPE | 5502 | 0.35 | 0.950 | 48.5~49 |
| HDPE | 5401 | 0.09 | 0.952 | 48.5~49.5 |
| Masterbatch | 1.5~3 |
HDPE container formula for concentrated sulfuric acid packaging
| Raw materials/number | 1 | 2 | 3 |
| HDPE | 100 | 100 | 100 |
| EVA | 2 | ||
| LC | 2 | 2 | |
| Carbon black | 0.1-0.5 | 0.1-0.5 | 0.1-0.5 |
| White oil | 0.2-1.0 | 0.2-1.0 | 0.2-1.0 |
Outdoor plastic seat formula
| Plastic brand | 7000F | 6098 | 18D | EVA | Masterbatch |
| Proportion% | 40 | 40 | 18 | 1.5-1.8 | 0.5-0.2 |
50-100L blow molding container formula
| Serial number | Plastic brand | 50100 | 5401 | 5502 | 1158 |
| 1 | Proportion% | 30-50 | 25-35 | 25-35 | |
| 2 | Proportion% | 60-80 | 20-40 | ||
| 3 | Proportion% | 25-30 | 25-30 | 40-50 |