วัสดุโพลียูรีเทนสำหรับยางอุตสาหกรรมยางเด็ก

Characteristic: Good handle, smooth surface

Application: Tire

Typical properties of PU matrix

Name of products

Appearance

Viscosity (mPa·s/40℃)

Density (g·cm^-3/40℃)

Package(kg)

/

A-3070

Liquid

1000~1400

1.01~1.02

18

B-8280

Yellowish transparent liquid or waxy

800~1200

1.08~1.2

20

Materials preheat

A-3070:  preheated at 50~60℃ for 6~8 hours.          

B-8280:  preheated at 50~60℃ for 10~12 hours.

Typical processing parameters & Reaction parameter

Items

A/B Materials Temperatures(℃)

A+C/B Mix ratio
(By weight)

Cream Time (s)

End of Rise Time (s)

Free Rise Foam Density(g/cm³)

Mold Temperature(℃)

Demold Time(min)

Parameter

40~45/38~42

100/101~103

8~10

60~70

0.24~0.26

45~55

5~7

The adding content of C-2 should be 250g±10g/18kg

The adding content of water should be 0~90g/18kg according to the reality

The adding content of hardener should be 0~600g/18kg according to the reality

Physical properties

Items

Molded Density
(g/cm3)

Hardness
(Shore A )

Tensile strength
(MPa)

Elongation
 (%)

Tear Strength
(kN/m)

Physical  properties

0.50~0.70

55~68

7.5~9.0

340~450

24~33

Demold time may be prolonged with the increase of sole thickness.

These physical data are acquired by testing a sample of 6mm thick.