A compounder sells a formulation, so every lot needs proof that the filler loading, melt behaviour and stability match the recipe. Our compound resin testing instruments give you those numbers on the bench. We work as compound resin testing instruments manufacturers in India and suppliers in India for compounding plants and development labs.
The range is organised by what a compound lab has to decide. Melt behaviour is studied with the capillary rheometer and the torque rheometer with internal mixer. Composition is checked with the muffle furnace for ash, the thermogravimetric analyzer and the hydrostatic density balance. Stability is confirmed by OIT testing. Powder and granule properties use the bulk density apparatus, sieve shaker and moisture oven, and the compression press makes uniform plaques for further testing.
Large compounders run most of the group. A smaller masterbatch unit often starts with the muffle furnace, density balance and drying oven.
Last updated: November 2026
High-temperature muffle furnace set up for burn-off tests that determine ash and filler content of resins and compounds. Used to verify glass fibre, talc or calcium carbonate loading.
Funnel and cup apparatus for measuring apparent bulk density and flowability of resin powders and granules. Used by compounders, PVC and PE resin plants for receiving and release checks.
Twin-barrel capillary rheometer that measures shear viscosity of molten polymer compounds across a range of shear rates. Used by compounders to qualify processing behaviour of filled and reinforced resins.
Electromagnetic sieve shaker with a stack of test sieves for particle size distribution of resin powders. Used by compounders and PVC and PE resin plants to classify powders for extrusion and rotational molding.
Hydraulic heated platen press that molds resin compounds into flat plaques for physical testing. Used by compounders and test laboratories to prepare repeatable tensile and impact specimens from new batches.
Density balance based on the Archimedes principle for solid resin samples and compounds. Used to check filler loading, crystallinity and grade identification of plastic compounds.
Isothermal oxidation induction time instrument for checking antioxidant effectiveness in polyolefin compounds. Used by resin producers, pipe and cable compounders to judge processing and long-term thermal stability of batches.
Instrument that measures mass loss of resin samples as temperature increases in air or nitrogen. Used to determine polymer, plasticizer, carbon black and filler fractions in compounds.
Laboratory mixing rheometer that records torque and melt temperature while a resin compound is mixed in a heated chamber. Used for studying fusion, stability and processing behaviour of PVC and filled compounds.
Forced-draft laboratory oven for conditioning and drying resin samples and measuring weight loss from volatile matter or moisture. Used in PVC, PET and nylon resin quality control laboratories.
| Function | Products | What to confirm |
|---|---|---|
| Melt behaviour | Capillary Rheometer for Polymer Compound Melt Viscosity, Torque Rheometer with Internal Mixer for Resin Compounds | Barrel size, maximum temperature and pressure, shear rate range and mixer bowl volume for your batch sizes. |
| Composition and filler content | Ash Content Muffle Furnace for Filled Resin Compounds, Thermogravimetric Analyzer for Polymer Resin Composition, Hydrostatic Density Balance for Resin Compounds | Furnace maximum temperature and chamber volume, balance resolution, and the sample pan or crucible type for your resin. |
| Thermal stability | OIT Tester for Polyolefin Resin Thermal Stability | Test gas supply, cell temperature range, and whether the ASTM D3895 or ISO 11357-6 method is built into the software. |
| Powder and sample preparation | Bulk Density and Pour Density Apparatus for Resin Powders, Electromagnetic Sieve Shaker for Resin Powder Particle Size, Hydraulic Compression Molding Press for Resin Test Plaques, Volatile Matter and Moisture Hot Air Oven for Resins | Sieve diameters, press tonnage and platen size, oven airflow and the standard for bulk density cup volume. |
Compound resin instruments test the polymer system: melt flow, rheology, stability, ash and density. Pigment instruments test the colourant itself, such as tinting strength, oil absorption, fineness of grind and hiding power. A masterbatch maker normally needs both, using resin instruments on the carrier and compound and pigment instruments on the incoming colourant.
See also: Pigments Testing Instruments
The complete Compound Resin Testing Instruments range (10 products), in alphabetical order:
Check the maximum barrel temperature, pressure transducer range and die set, since viscosity depends on die length to diameter ratio. Ask whether software calculates Bagley and Rabinowitsch corrections, what melt volume the barrel needs and how easily the barrel is cleaned between compounds. Confirm the power supply and the lab compressed air or nitrogen requirement.
Oxidation induction time is measured in a heated cell under nitrogen and then oxygen, normally to the ASTM D3895 or ISO 11357-6 methods. Confirm temperature range, gas switching control, sample pan type and data logging. Polyolefin pipe, cable and film compounders usually need this to prove antioxidant levels.
Select a muffle furnace to at least 1000 deg C with PID control and good insulation, and choose a chamber size that holds your crucible batch. Ash content results for talc, calcium carbonate or glass fibre loaded compounds depend on controlled heating and dry cooling in a desiccator, so ask for suitable accessories.
Polymer compounders, masterbatch and colour concentrate makers, cable compound producers, recyclers upgrading regrind quality, resin distributors, R&D labs at plastic product plants and third-party polymer testing labs. A first lab usually combines a muffle furnace, density balance and drying oven, then adds rheometers and TGA for formulation development.
A torque rheometer mixes a batch in a heated chamber and records torque against time, showing fusion and processing stability. A capillary rheometer pushes melt through a die and measures viscosity across shear rates, which relates to extrusion and moulding behaviour.
Density shows if filler loading, voids or the wrong grade have crept into the compound. A hydrostatic balance gives quick and accurate results on pellets or moulded plaques, and it is often a certificate item for customers.
Yes. The sample is heated in a controlled atmosphere and mass loss steps show volatiles, polymer and carbon black, while the residue represents inorganic filler. It gives more information than a simple ash test but costs more to buy.
Yes. Instruments are made in India and supplied to compounders, laboratories and distributors across the country and for export. Data sheets and drawings are provided for tender submissions, and installation support can be arranged.
Uniform plaques remove processing differences, so you can compare compounds on density, hardness, tensile or colour without moulding machine effects. Platen temperature and pressure control are important for repeatable plaques.
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