Brand selection for PP formula design
According to the national standard GB 2546-88, polypropylene resin is classified according to polymer type, main use, isotactic index, melt index and material characteristic properties. The polypropylene resin was composed in the following order.
Material characteristic performance melt index (see Table 1)
Isometric index (see Table 2)
Main use (see Table 3)
Polymer type (see Table 4)
Table 1 Polymer Type
H Homopolymer | C Block copolymer | R Random copolymer | M mixture |
Table 2 Main uses
B | C | E | F |
Blow molding | Squeeze | Extrusion | film |
K | L | M | P |
Cable covering | Monofilament | Injection molding | Pipe |
R | S | T | Y |
Rotational molding | Robe plastic | fiber | Flat wire |
Table 3 isotactic index
Numbering | 98 | 93 | 85 |
Equality /% | 95-100 | 90-95 | 80-85 |
Numbering | 75 | 65 | 55 |
Equality /% | 70-80 | 60-70 | 50-60 |
Table 4 Melt index
Numbering | 002 | 007 | 015 |
Melt index / g•10min -1 | 0.1-0.3 | 0.3-1 | 1-2 |
Numbering | 030 < |
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