INTRODUCTION
PU Sandal shoe-sole system is the polyester-based PU system materials, consist of four components: polyol, ISO, hardner and catalyst. The processing of this system is two components. In this case the catalyst, harder, blowing agent and pigment should be mixed thoroughly with the polyol component EXD-3070A before reaction with ISO component EXD-3022B. This system material is used to produce low density and medium hardness Sandal, casual & cloth shoes. Processing of the system is normally performed with injection machine.
TYPICAL PROCESSING & REACTION PARAMETER
|
Hardness（Shore A） |
55 |
60 |
65 |
|
|
Adding amount g /(18KG EXD-3070A) |
Y-01 |
0 |
250 |
500 |
|
EXD-03C |
250 |
250 |
250 |
|
|
Blowing agent (Water) |
75 |
75 |
75 |
|
|
Pigment |
800 |
800 |
800 |
|
|
Reaction Ratio by weight |
Mixture (EXD-3070A & additives) |
100 |
100 |
100 |
|
EXD-3022B |
85-88 |
92-94 |
98-101 |
|
|
Material temperature（A/B，℃） |
45/40 |
45/40 |
45/40 |
|
|
Mould temperature（℃） |
45 |
45 |
45 |
|
|
Cream time（s） |
6-8 |
6-8 |
6-8 |
|
|
Rise time（s） |
30-35 |
30-35 |
30-35 |
|
|
FRD（g/cm3） |
0.24-0.26 |
0.24-0.26 |
0.24-0.26 |
|
|
Product density（g/cm3） |
0.40-0.45 |
0.40-0.45 |
0.40-0.45 |
|
|
Demould time（min） |
2-2.5 |
2-2.5 |
2-2.5 |
|