Rimpex Rubber, China
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Medical Dental Grade TPI Granules, Synthetic Gutta-Percha, TransIsoprene Rubber, Trans PolyIsoprene, TPI, Trans-l,4-PolyIsoprene
China Largest Manufacturer Of Meteorological Balloons
 
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Rimpex Rubber introduces Kumho NBR, Nitrile Butadiene Rubber.

Standard of Test Item

KNB
25LM

KNB
25M
KNB
25LH
KNB
25H
KNB
25SH
KNB
35LL
KNB
35L
KNB
35LM
KNB
35M
KNB
35H
KNB
40M
KNB
40H
KNB
0230
KNB
0230L
Bound AN (%)
28
34
41
35
Raw MV(ML1+4, 100℃)
50
60
70
80
100
33
41
50
60
80
60
80
56
42
Specific Gravity
0.96
0.98
1.00
0.98
Compound Properites*1)
Compound MV
(ML1+4, 100℃)
73
90
101
114
140
54
66
78
90
110
92
113
60
64
Rheometer(160℃, ARC±1)
ML(1bf.in)
14.1
15.7
18.0
21.0
23.5
9.7
10.4
11.9
15.5
16.5
11.5
13.9
11.6
10.9
MH(1bf.in)
40.4
41.0
42.0
43.5
45.5

38.9

40.2
41.4
44.0
46.3
41.9
45.1
43.2
42.7
Ts1(min)
3.0
2.9
3.3
3.0
3.0
3.8
3.1
2.2
2.0
2.2
2.3
2.7
2.3
2.6
T'50(min)
4.7
4.3
4.9
4.7
4.8
6.0
5.2
4.2
4.2
4.0
6.6
6.2
3.8
4.0
T'90(min)
17.0
16.9
16.0
15.6
16.5
16.9
16.3
15.3
16.3
16.1
19.6
20.1
12.9
12.4
Vulcanization Properties*2)
300% Modulus (kgf/cm2)
140
155
168
175
185
132
141
148
153
168
160
170
160
150
Tensile Strength (kgf/cm2)
275
285
285
285
290
300
310
313
327
334
345
360
300
295
Elongation(%)
510
480
440
440
310
570
550
530
520
500
560
540
500
510
Hardness(Shore-A)
73
73
73
73
73
74
74
74
74
74
75
75
74
74
ASTM #1 Oil Immersion Change*3)
300% Modulus(%)
23
22
24
24
25
42
35
39
40
43
45
47
40
38
Tensile Strength(%)
-7
-8
-8
-10
-13
-8
-13
-6
-6
-4
-1
-1
-3
-3
Elongation(%)
-20
-20
-23
-18
-21
-29
-28
-23
-21
-20
-26
-29
-25
-24
Hardness(Change)
-4
-4
-4
-3
-3
0
0
0
-1
0
4
4
-1
-1
Volume(Change%)
2
2
2
3
1
-1
0
0
0
0
0
-1
0
0
*1) NBR 100, ZnO 3, Stearic Acid 1, HAF Black (IRB#7) 40, Accelerator TBBS 0.7, Sulfur 1.5, Total : 146.2
*2) 150℃×40 Min. Press Vulcanization
*3) 100℃×70hrs, Change Rate

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