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Description
NR or Natural Rubber Polyisoprene.
It is obtained as latex liquid which comes from rubber trees. Of the different species that contain the liquid, only the Hevea Brasiliensis is commercially exploited.
Originally from the Amazon region, it is now cultivated intensively in South East Asia and Africa.
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Properties
• Excellent mechanical properties.
• Available in a wide range of hardnesses from
35º to 90º Sh.A.
• Low compression set and high resilience.
• Excellent dynamic and rebound properties.
• Temperature range: -60 F to +195 F.
• Resistance to chemicals; good resistance to acids, alkalis and salts. Its contact with oils and hydrocarbons is not advisable.
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| Natural Rubber: Black |
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| Ref. |
Specific Gravity |
Hardness |
Tens. Stren. |
Elong. |
Tear. Stren |
Abras.Resist.
mm3 |
Compres.
Set |
Working
Temp. |
| |
g/cm3 |
Shore A |
psi |
% |
ppi |
5 N |
10 N |
C |
h |
% |
F |
| R395 |
1,00 |
35 |
2850 |
625 |
140 |
150 |
|
70 |
22 |
30 |
-40/176 |
| R350 |
1,05 |
40 |
2150 |
500 |
140 |
120 |
|
70 |
22 |
30 |
-58/185 |
| R431 |
1,03 |
45 |
2300 |
600 |
150 |
90 |
|
70 |
22 |
35 |
-58/185 |
| R520 |
1,07 |
50 |
2300 |
600 |
150 |
90 |
|
70 |
22 |
35 |
-58/185 |
| R547 |
1,11 |
55 |
1995 |
450 |
150 |
120 |
|
70 |
22 |
25 |
-58/185 |
| R650 |
1,12 |
62 |
2550 |
400 |
280 |
|
90 |
70 |
22 |
30 |
-58/185 |
| R721 |
1,16 |
70 |
2550 |
350 |
250 |
|
110 |
70 |
22 |
35 |
-58/194 |
| R847 |
1,15 |
80 |
2150 |
240 |
170 |
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120 |
70 |
22 |
40 |
-40/176 |
| R848 |
1,16 |
85 |
2150 |
240 |
160 |
|
120 |
70 |
22 |
30 |
-40/176 |
| R940 |
1,16 |
90 |
1900 |
220 |
160 |
|
120 |
70 |
22 |
50 |
-22/176 |
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Commercial Natural Rubber: Black
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| Ref. |
Specific Gravity |
Hardness |
Tens. Stren. |
Elong. |
Tear. Stren |
Abras.Resist.
mm3 |
Compres. Set |
Working
Temp. |
| |
g/cm3 |
Shore A |
psi |
% |
ppi |
5 N |
10 N |
C |
h |
% |
F |
| R439 |
1,18 |
50 |
1200 |
400 |
170 |
125 |
|
70 |
22 |
40 |
-40/158 |
| R698 |
1,21 |
60 |
2150 |
400 |
225 |
|
130 |
70 |
22 |
35 |
-40/185 |
| R608 |
1,49 |
65 |
550 |
200 |
65 |
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480 |
70 |
22 |
43 |
-13/158 |
| R798 |
1,22 |
70 |
2200 |
350 |
225 |
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130 |
70 |
22 |
40 |
-40/185 |
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Natural Rubber: Different Colours
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| Ref. |
Specific Gravity |
Hardness |
Tens. Stren. |
Elong. |
Tear. Stren |
Abras.Resist.
mm3 |
Compres. Set |
Working
Temp. |
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g/cm3 |
Shore A |
psi |
% |
ppi |
5 N |
10 N |
C |
h |
% |
F |
| R399 Natur. |
0,95 |
35 |
2850 |
600 |
170 |
100 |
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70 |
22 |
30 |
-40/176 |
| R499 Natur. |
1,00 |
43 |
2850 |
650 |
170 |
80 |
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70 |
22 |
30 |
-40/176 |
| R490 Natur. |
1,05 |
45 |
2300 |
600 |
140 |
83 |
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70 |
22 |
30 |
-40/185 |
| R408 Natur. |
1,10 |
45 |
2050 |
550 |
110 |
110 |
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70 |
22 |
35 |
-40/158 |
| R397 Red |
0,95 |
35 |
3400 |
700 |
170 |
60 |
|
70 |
22 |
30 |
-40/176 |
| R504 Red |
1,01 |
40 |
2850 |
650 |
170 |
80 |
|
70 |
22 |
30 |
-40/176 |
| R492 Red |
1,05 |
45 |
2300 |
600 |
140 |
83 |
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70 |
22 |
30 |
-40/185 |
| R409 Red |
1,10 |
45 |
2050 |
550 |
110 |
110 |
|
70 |
22 |
35 |
-40/158 |
| R483 Red |
1,06 |
50 |
2300 |
500 |
140 |
75 |
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70 |
22 |
30 |
-40/185 |
| R583 Red |
1,07 |
60 |
2300 |
400 |
140 |
75 |
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70 |
22 |
30 |
-40/185 |
| R525 Red |
1,30 |
65 |
1150 |
400 |
110 |
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70 |
22 |
38 |
-22/158 |
| R683 Red |
1,10 |
70 |
1995 |
300 |
170 |
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140 |
70 |
22 |
40 |
-40/185 |
| R320 White |
0,95 |
40 |
2700 |
600 |
180 |
110 |
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70 |
22 |
25 |
-40/176 |
| R503 White |
1,04 |
40 |
2850 |
650 |
170 |
80 |
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70 |
22 |
30 |
-40/176 |
| R642 White |
1,30 |
65 |
1450 |
600 |
145 |
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200 |
70 |
22 |
35 |
-49/176 |
| R742 White |
1,30 |
75 |
1450 |
300 |
140 |
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200 |
70 |
22 |
35 |
-49/176 |
| R396 Yellow |
0,97 |
35 |
3400 |
700 |
170 |
60 |
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70 |
22 |
30 |
-40/176 |
| R510 Yellow |
1,01 |
40 |
2850 |
650 |
170 |
80 |
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70 |
22 |
30 |
-40/176 |
| R491 Yellow |
1,05 |
45 |
2300 |
600 |
140 |
83 |
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70 |
22 |
30 |
-40/185 |
| R480 Yellow |
1,09 |
45 |
2050 |
550 |
110 |
110 |
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70 |
22 |
35 |
-40/158 |
| R398 Green |
0,95 |
35 |
3400 |
700 |
170 |
60 |
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70 |
22 |
30 |
-40/176 |
| R506 Green |
1,01 |
40 |
2850 |
650 |
170 |
80 |
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70 |
22 |
30 |
-40/176 |
| R496 Green |
1,04 |
45 |
2300 |
600 |
170 |
80 |
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70 |
22 |
30 |
-58/185 |
| R406 Green |
1,09 |
45 |
2050 |
550 |
110 |
110 |
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70 |
22 |
35 |
-40/158 |
| R570 Green |
1,20 |
55 |
1853 |
450 |
170 |
170 |
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70 |
22 |
40 |
-40/176 |
| R644 Green |
1,31 |
65 |
1450 |
600 |
145 |
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200 |
70 |
22 |
35 |
-49/176 |
| R574 Orange |
1,25 |
50 |
2300 |
400 |
145 |
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70 |
22 |
30 |
-40/176 |
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Commercial Natural Rubber: Different Colours
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| Ref. |
Specific Gravity |
Hardness |
Tens. Stren. |
Elong. |
Tear. Stren |
Abras.Resist.
mm3 |
Compres. Set |
Working
Temp. |
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g/cm3 |
Shore A |
psi |
% |
ppi |
5 N |
10 N |
C |
h |
% |
F |
| R449 Red |
1,28 |
50 |
1450 |
500 |
85 |
250 |
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70 |
22 |
40 |
-40/176 |
| R660 Red |
1,61 |
68 |
700 |
220 |
65 |
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490 |
70 |
22 |
55 |
-13/158 |
| R448 White |
1,31 |
50 |
1450 |
500 |
85 |
250 |
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70 |
22 |
40 |
-40/176 |
| R661 White |
1,61 |
68 |
700 |
220 |
65 |
|
490 |
70 |
22 |
55 |
-13/158 |
| R572 Yellow |
1,26 |
45 |
1853 |
500 |
110 |
225 |
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70 |
22 |
40 |
-40/176 |
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