Test subject

Technical requirements

Test results

Test values

Unit conclusion

1

Density(g/²)

≥1.2

1.52

Qualify

2

Softening point ()

90~125

107

Qualify

3

Color and appearance of coating film

After drying , no wrinkle, spot , falling off, sticking to the wheel .And the color and shape of coating has not large differences  to  standard plate

Meet the demands

Qualify

4

Drying time of not sticking to wheel(Min.)

≤15

9

Qualify

5

Color features

white

Color coordinate(x,y)

In the quadrangle consisted of the following four side coordinate

(0.       350,0.360);(0.300,0.310)

(0.290,0320);(0.340,0.370)

X:0.310

Y:0.0328

Qualify

Brightness factor

≥0.75

0.81

Qualify

yellow

Color coordinate(x,y)

In the quadrangle consisted of the following four side coordinate

(1.       350,0.360);(0.300,0.310)

(0.290,0320);(0.340,0.370)

Brightness factor

≥0.45

6

Compression strength (Mpa)

≥12

20.1

Qualify

7

Anti-abrasion (mg)

(200r/1000g reduce weight)

≤40(JM-100 rubber grinding wheel )

27.0

Qualify

8

Anti-watering

No abnormal phenomenon dunking in water for 24h

Meet the demands

Qualify

9

Anti-alkali

No abnormal phenomenon dunking in calcium hydroxide  saturated solution for 24h

Meet the demands

Qualify

10

Content of glass beads

18~25

21.8

Qualify

11

Flow resistance

35±10

39

Qualify

12

Low temperature Anti-cracking of coating layer

Keep 4h in -10 ,and lay 4h in normal temperature as a circulation .And continuously do three circulations , no crack

Meet the demands

Qualify

13

Heating stability

Keep 4h in 200~220in agitating condition, no obviously yellowing, burnt , blocked

Meet the demands

Qualify

A .Sample has soft features .The test results is the value of that the sample is pressed to the 80%height to the original height