1. Physical Testing Laboratory, Rubber Research Institute of
Malaysia (RRIM), Malaysian Rubber Board (MRB), Sungai Buloh.
Nurul Azwin binti Mazlan
1110117
3. In 1925, RRIM Headquarters established in Jalan Damansara, KL. Opening of
Experiment Station in Sungai Buloh.
Relocated at 260 Jalan Ampang, Kuala Lumpur on 19 May, 1937.
MRB is a government agency under the support of the Ministry of Plantation
Industries and Commodities (KPPK).
Established with the specific purpose of exercising overall control of the
research, technical development, market regulation and promotion work in
support of the Malaysian rubber industry.
MRB include: Standard Development Agency, Academy Hevea Malaysia and
GTACr
4. GTA𝐂 𝐑 Office
Collect report, fax/scan email and mail report.
Laboratories
login sample, do analysis, validate results, print and sign the reports.
GTA𝐂 𝐑 subsampling and distribution group
Do sub sampling (if required) and distribute samples to respective labs
GTA𝐂 𝐑 payment counter
Prepare payment receipt,credit bill, proforma invoice or vote transfer bill
G-TA𝐂 𝐑 registration counter
Receive, register, label and acknowledge test for sample
One stop centre of rubber testing and consultancy service.
7. Did a comparative test between the old and new
machine. Several tests had been done including:
(1) Electrical Resistivity Test
(2) Heat Build-up Test
(3) Compression Stress Relaxation Test
Learnt all standard test method related to rubber.
8. Keithley Picoammeter 485 model connected with
Resistivity Adaptor 6105 and GW DC Power Supply
6517B electrometer/ high resistance meter connected
with the Keithley Model 8009 Resistivity test fixture.
• Test conducted on both surface and volume resistivity depending on the
appropriate electrode system.
• 2 different sample control sample
electrical resistivity sample
• ASTM D257 standard test method
• Nominal thickness of the test piece shall be in the range 0,5 mm to 5 mm,
preferably 1 mm or 2 mm.
9. Thickness is measured
Sizemin: 63.5 mm, max: 101.6 mm x
3.2 mm thick) greater than the annular
electrode.
Put acetone mixture
Conditioned at least 24 h in
desiccator
Sample put into test fixture
10. Volume resistivity measurement:
𝜌 =
22.9 𝑉
𝑡 𝑐 I
ohm-centimeters (1)
𝜌 volume resistivity of sample
V applied voltage from power supply in volts
𝑡𝑖 the average thickness of sample in inc
𝑡 𝑐 the average thickness of sample in cm
Surface resistivity measurement:
𝜎 =
53.4 𝑉
𝐼
ohm-centimeters (2)
𝜎 surface resistivity of sample
𝐼 Current outputs
V applied voltage from power supply in volts
11. Doli Compression Flexometer with fully automatic
system
Ueshima Compression Flexometer/Goodrich
Flexometer
• exposing a rubber sample of a specified size and shape to oscillating
compressive stresses .
• Check durability of rubber in finished product
• Follow the standards ISO 4666/3, ASTM D 623 and BS 903, part A50
12. vulcanized rubber with diameter
(17.8−
+
0.15) mm and height (25−
+
0.25)
mm
Temperature chamber where
sample was inserted into (old
machine) (a) (new machine) (b)
Dusty samples is put
into the silo (for
automatic machine)
13. Compression Stress Relaxometer
(old machine)
Compression Stress Relaxometer
(New machine)
• Defines as a reduction in compressive force, expressed as percentage of the
initial force.
• Accordance by international standard (ISO 3384, MS ISO 3384, BS 3384) and
American Society for Testing and Material (ASTM D575)
• duration of test shall be 168 h
• Stress Relaxation percentage: R(t)= 𝐹0 - 𝐹𝑡 /𝐹0 x 100
14. The cylindrical shape of rubber sample with diameter 13
mm ± 0.5 and thickness 6.3 mm ± 0.3 and compressed
blank jigs were prepared.
Jigs placed under the load
cell and ready to be tested
15. Has difficulties on:
Understanding and differentiate the all the
unfamiliar standard methods.
Clarify on how the machine is operated
Adapting in working environment
Test need to be repeated many times due to
several error
Challenges
16. Enhance common IT subject into more programming
skills (Java C++ programming, Mat lab, AutoCAD )
deepen core subject
Choose the right topic that more related to the
industry
The study of quality control and quality assurance
should be insert in the syllabus
Suggestions
