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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