Fire resistance conveyor belt

code

Test items

Unit

Standard

Results

1

Surface quality

/

/

standard

2

Width deviation

mm

±10

-2

3

Upper cover rubber thickness deviation

mm

≥6.65

7.00

4

Bottom cover rubber thickness deviation

mm

≥2.80

3.10

5

Longitudinal through thickness tensile strength

N/mm

≥450

465

6

Horizontal through thickness tensile strength

N/mm

≥100

145

7

Through thickness longitudinal elongation

%

≥1.0

0.7

8

Longitudinal through thickness elongation of break

%

≥3.0

3.7

9

Cover burning test Depth in first

mm

≥0.5

0.3

10

Ten time burning test indepth

mm

≥0.1

-0.4

11

The min tensile strength value of cover of after hot air aging at 125°C×168h

mpa

5

12

12

The change rate of tensile strength reduction

%

40

25

13

The min elongation at break

%

180

450

14

The change rate of tensile strength reduction

%

55

34

15

Average longitudinal adhesive between plies at normal temperature

N/mm

≥6.0

18.6

16

Min longitudinal average value between plies

N/mm

4.0

18

17

Average longitudinal value between cover and carcass

N/mm

≥6.0

16.8

18

Min value between cover and carcass

N/mm

4.0

16.4

19

Cover thickness >3mm: longitudinal average value between cover rubber and carcass

20

Min longitudinal value between cover and carcass

N/mm

4.0

16.8

21

At 160°C between fabric layers

N/mm

≥3.0

6.2

22

Min longitudinal value between plies

N/mm

2.0

4.3

23

thickness

N/mm

≥3.0

4.8

24

Min longitudinal value between cover and carcass

N/mm

2.0

4.4

25

Cover thickness >3mm: longitudinal average between cover and carcass

N/mm

≥3.0

5.6

26

Min longitudinal between cover and carcass

N/mm

2.0

5.1