INTRODUCTION
PU Safety shoe-sole system is used to make safety shoe outsoles and inner soles. It is polyester-based PU system material, consist of four components, polyol, ISO, hardner and catalyst. The processing of the system is two components. The catalyst, harder, blowing agent and pigment should be mixed thoroughly with the polyol component EXD-3270A, then mix with ISO component EXD-3119B for making final wares.
PHYSICAL PROPERTIES
A, Inner soles of safety shoe-sole preparing method:
|
Items |
EXD-3270A |
EXD-3119B |
|
Ratio（weight ratio） |
100 |
85~88 |
|
Material temperature（℃） |
45~50 |
45~50 |
|
Rise time（s） |
5~7 |
|
|
Tack free time（s） |
30~50 |
|
|
Free foam density （g/cm3） |
0.35~0.4 |
|
|
Mould temperature（℃） |
45~55 |
|
|
Product density（g/cm3） |
0.5~0.55 |
|
|
Hardness（Shore A） |
55~65 |
|
|
Demould time（min） |
3 |
|
|
Elongation at break （%） |
≥550 |
|
|
Tear strength（KN/m） |
≥22 |
|
|
Tensile strength （MPa） |
≥6.0 |
|
|
Ross flexing room temperature |
50,000 times no crack |
|
B, Outsoles of safety shoe-sole preparing method:
|
Items |
EXD-3270A |
EXD-3119B |
|
Ratio（weight ratio） |
100 |
82~85 |
|
Material temperature（℃） |
45~50 |
45~50 |
|
Rise time（s） |
5~7 |
|
|
Tack free time（s） |
30~50 |
|
|
Free foam density （g/cm3） |
0.55~0.6 |
|
|
Mould temperature（℃） |
45~55 |
|
|
Product density（g/cm3） |
0.6~0.8 |
|
|
Hardness（Shore A） |
65~75 |
|
|
Demould time（min） |
3 |
|
|
Elongation at break （%） |
≥600 |
|
|
Tear strength（KN/m） |
≥28 |
|
|
Tensile strength （MPa） |
≥7.3 |
|
|
Ross flexing room temperature |
50,000 times no crack |
|
|
Demould time(min) |
3 |
|
|
Product density(g/cm3) |
0.2~0.3 |
|
|
Hardness(Shore C) |
30~40 |
|
|
Tensile strength(MPa) |
0.45-0.50 |
|
|
Tear strength(KN/m) |
2.50-2.60 |
|
|
Elongation(%) |
280-300 |
|