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| Technically
Specified Rubber (T.S.R) |
|
| The
Industry started in the late 1960's to produce rubber whose properties
are exactly known. Prior to this, rubber was produced in three forms-
ECB, PLC & SHEET. However the actual properties and grade of these
were determined visually and therefore was commonly susceptible to human
error. It was felt that a new and standardised method was required to
scientifically establish properties of various grades of latex and to
ensure proper grading. Thus Technically Specified Rubber (TSR) grading
was established. We ourselves are one of the pioneers in this field in
India. Today it is a well established industry providing rubber, which
meets exact standards. |
In India the
specification for this divides various quality levels into 7 grades.
|
 |
ISNR 3 CV |
|
 |
ISNR 3L |
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 |
ISNR 5 |
|
 |
ISNR 10 |
|
 |
ISNR 15 |
|
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ISNR 20
|
|
 |
ISNR 50
|
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|

ISNR 20 |
|
 ISNR
3L |
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|
1986
Indian Standard Specification for Rubber, Raw, Natural Physical
and Chemical Requirements for Rubber, Raw, Natural |
| Sl. No. |
Characteristic |
ISNR 3CV |
ISNR 3L |
ISNR 5 |
ISNR 10 |
ISNR 20 |
ISNR 50 |
| i) |
Dirt
content, percent by mass, Max. |
0.03 |
0.03 |
0.05 |
0.10 |
0.20 |
0.50 |
| ii) |
Volatile
matter, percent by mass, Max. |
0.80 |
0.80 |
0.80 |
0.80 |
0.80 |
0.80 |
| iii) |
Ash,
percent by mass, Max. |
0.50 |
0.50 |
0.60 |
0.75 |
1.00 |
1.50 |
| iv) |
Nitrogen,
percent by mass, Max. |
0.60 |
0.60 |
0.60 |
0.60 |
0.60 |
0.60 |
| v) |
Initial
plasticity |
As agreed to
between the purchaser and the supplier |
30 (Min) |
30 (Min) |
30 (Min) |
30 (Min) |
30 (Min) |
| vi) |
Plasticity
Retention index (PRI) Min. |
60 |
60 |
60 |
50 |
40 |
30 |
| vii) |
Colour
(Lovibond scale), Max. |
- |
6.0 |
- |
- |
- |
- |
| viii) |
Mooney
viscosity ML 1.1 AT 100 °C |
60±5 |
- |
- |
- |
- |
- |
| ix) |
Accelerated
storage hardening, DP |
8 (Max) |
- |
- |
- |
- |
- |
|
|
The first three
are called latex grades: They use coagulated field latex as the chief
raw material, the remaining four use cuplump as raw material. Of these
the biggest market in India is for ISNR-20 grade which is used by most
tyre manufacturers. |
Testing
Facilities Stringent testing as per norms is carried out to
ensure that production meets various parameters. We have a well equipped
lab to undertake testing. From a lot, samples are cut from two opposing
corners of every tenth bale. The two are then bulked and tested for
various parameters. |
| The
parameters tested for are |
|
 |
Dirt Content |
|
 |
Initial Plasticity
(P0) |
|
 |
ASN Content |
|
 |
Plasticity
Retention Index (PRI) |
|
 |
Nitrogen Content
|
|
 |
Colour or
Louibond Scale (in case of ISNR 3L) |
|
 |
Volatile Matter
Content |
|
 |
Mooney Viscosity
(in case of ISNR 3CV) |
|
Effluent
Treatment The
crumb rubber factory produces around 1.5 lakh liters of effluent every
day. Being environmentally conscious we have set up exclusive effluent
treatment plants to treat this effluent water and convert it into usable
forms. The treated effluent is thoroughly cleaned so that it is
converted to irrigation water and then utilized in surrounding land for
this very purpose. At times of water shortage, the water is recycled for
use in the factory itself.
The factory itself is set in an area
of 10 acres where various agricultural products are grown.
|