Polyuretansytem för stötdämpare

Characteristic: Good handle, hydrolysis resistance and cold resistance, high elasticity

Application: Cold resistance medium hardness sole, marine fender, shock absorption mat

Typical properties of PU matrix

Name of products

Appearance

Viscosity (mPa·s/40℃)

Density (g·cm^-3/40℃)

Package(kg)

/

A-7160

Liquid

1000~1400

1.01~1.02

18

B-8260

Yellowish transparent liquid or waxy

700~1100

1.08~1.2

20

Materials preheat

A-7160:  preheated at 50~60℃ for 6~8 hours.          

B-8260:  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

100/106~108

8~10

50~60

0.26~0.29

45~55

5~7

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

The adding content of water should be 0~40g/18kg according to the reality.

Physical properties

Items

Molded Density (g/cm³)

Hardness
(Shore A )

Tensile strength
(MPa)

Elongation
 (%)

Tear Strength
(kN/m)

Flexing resistance
 (Break length 4mm)
(-20℃)

/

Physical  properties

0.55~0.70

65~72

8.5~10

500~680

34~45

40,000 times no increasing

/

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

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

Data listed above are just for reference. The detail data are subjected to practical production. If other requests for physical properties, please contact us.