According to national standard GB 2546-88, polypropylene resin is classified according to the type of polymer, main use, isotactic index, melt index and material characteristic performance. Polypropylene resin is composed in the following order.
Material characteristics Performance melt index (see Table 1)
Regulation index (see Table 2)
The main purpose (see Table 3)
Polymer type (see Table 4)
Table 1 Polymer Types
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 coating
Monofilament
Injection molding
Pipe
R
S
T
Y
Rotary molding
Robe plastic
fiber
Flat yarn
Table 3 The isotactic index
Numbering
98
93
85
Regulation/%
95-100
90-95
80-85
Numbering
75
65
55
Regulation/%
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<
Single Jersey Cotton Printed Fabrics,Solid Color Single Jersey Fabric,Double Jersey Fabric,Single Jersey Polyester Knit Fabric
Shaoxing Winfar Knitting & Embroidery Co.,Ltd. , https://www.wfknitting.com