1. Cover properties of the belts:

Cover grade

Tensile strength >=

Elongation >=

Abrasion <=

Change Rate of tensile strength and elongation after aging

Mpa

kgf/cm2

%

mm 3

%

H

24

240

450

120

-25~+25

D

18

180

400

100

-25~+25

L

15

150

350

200

-25~+25

Index description

Between layers

Cover layer and fabric layer

Thickness of cover layer≤1.5mm

Thickness of cover layer>1.5mm

The longitudinal of sample average value

≥4.5N/mm

3.2N/mm

3.5 N/mm

The horizontal of sample average value

≥4.5 N/mm

3.2 N/mm

3.5 N/mm

The max of entirely sample value

≤20 N/mm

20 N/mm

20N/mm

The min of entirely sample value

≥3.9 N/mm

2.4 N/mm

2.9 N/mm

width(mm)

layer

Cover layer thickness(mm)

top

bottom

400

3~4

4.5 3.0

3.0 1.5

500

3~5

4.5 3.0

3.0 1.5

600

3~5

6.0 4.5 3.0

3.0 1.5

650

3~5

6.0 4.5 3.0

3.0 1.5

800

3~6

6.0 4.5 3.0

4.5 3.0 1.5

1000

3~7

6.0 4.5 3.0

4.5 3.0 1.5

1200

4~7

6.0 4.5

4.5 3.0 1.5

1400

4~7

6.0 4.5

4.5 3.0

1600

4~7

6.0 4.5

4.5 3.0

1800

4~7

6.0 4.5

4.5 3.0

2000

4~7

6.0 4.5

4.5 3.0

2200

4~7

6.0 4.5

4.5 3.0

1. Cover rubber physics property:

Cover rubber tensile strength ( Mpa )≥

10

Cover rubber elongation at break ( % )≥

350

Note : The physics property of common fire resistant without cover (cover thickness ≥2.0mm)

Indexes

Fabric layer

Between cover rubber and fabric layer

Cover thickness ≤1.5mm

1.5mm Rubber thickness >1.5mm

The max samples average value≥

5.0

3.5

3.9

The min samples average value≥

3.9

2.4

2.9

3.Safe property:

J Flame retardant property J Average value of duration of flame of 3 test pieces with covers does not exceed 60s and no reappearance of flame on any test piece

Flame retardant J and anti-static property: Surfaces electrical resistance ≤3×10 8 Ω