Plan a trial for your application
Tires and dynamically loaded parts
Using the same batch formulation, compare mixing power, fatigue and green strength.
Rubber compound batch uniformity
Check Mooney viscosity, plasticity and impurity results across rubber bales for variation.
Purchase specifications and incoming inspection
Use these properties to compare grades within the product family. Example figures refer to the cited grade or source. Confirm the offered specification, packaging and lead time in the quotation. FGV · Natural rubber commercial grades ↗
| Property | Unit | Published or agreed specification | Test conditions and checks |
|---|---|---|---|
| Impurity content | % by mass | Confirm against the offered grade and purchase specification | Verify against the specific technical grade and sieving method. |
| Plasticity retention index | PRI | Confirm against the offered grade and purchase specification | Retest using the specified ageing conditions and method. |
| Mooney viscosity | MU | Confirm against the offered grade and purchase specification | Specify the rotor, temperature and timing. |
When approving a sample, record the grade, methods, limits and specification revision. On receipt, match the packing lot number to the lot-specific COA and record the measured values and release decision.
From samples to commercial delivery
Packaging and receiving
State origin, grade, net bale weight and wrapping. Do not combine different technical grades into one lot.
Storage and handling
Assess transport compression and storage effects on processing. Take samples from several bales.
Sample and order lead times
State processing equipment, trial batch size and monthly demand. Confirm same-grade samples, first-order MOQ, staged deliveries and arrival date.
Questions from the plant
Can RSS and technically specified rubber use the same acceptance sheet?
Check each grading system separately, then compare the buyer’s common acceptance properties.
Does one passing bale Mooney result establish pallet uniformity?
Sample several bales under an agreed plan. Record the mean and within-lot variation.
Report a delivery or batch issue
Include the order number, lot number from the package, label photos and inspection records for the affected lot. When retesting, check Impurity content, Plasticity retention index, Mooney viscosity.
Request documents for your application
TDS · Technical data sheet
For grade selection and sample approval, specify the grade and revision required.
SDS · Safety data sheet
Specify the country or region of use and the required language.
COA · Certificate of analysis
Request a sample COA during supplier review. For incoming inspection, provide the actual lot number.