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To determine percentage of ash in polymers. Furnace with other sizes can also be offered.
International Equipments is a leading manufacturer, supplier and exporter of Laboratory Muffle Furnaces in India. Built at our Mumbai facility, our Muffle Furnace is a precision high-temperature furnace designed to heat samples up to 1150°C in a controlled, insulated chamber - the standard instrument used by plastic, polymer, rubber, packaging, ceramic and quality testing laboratories for ash content determination, carbon black content testing, loss on ignition, sample preparation and many other high-temperature laboratory operations.
Ash content - the inorganic residue left after a polymer sample is completely burned - is one of the most important QC parameters in the plastic industry. It tells you the mineral filler content of a compounded polymer, the contamination level of recycled plastic, and is the foundation of the carbon black content test for HDPE pipe and PLB duct material. The Muffle Furnace is the dedicated, accurate instrument that delivers this measurement, working alongside the Hot Air Oven to form the complete thermal-test setup found in every well-equipped polymer QC laboratory.
A Muffle Furnace - also called a High-Temperature Furnace, Ash Furnace, Box Furnace or Laboratory Furnace - is a heating chamber that holds samples at a controlled high temperature (typically up to 1100-1200°C) in an isolated 'muffle' chamber. The term 'muffle' refers to the way the heating element is separated from the sample chamber - heat reaches the sample by radiation and conduction through a refractory chamber wall, rather than the flue gases or heating element coming into direct contact with the sample. This isolation is what allows clean, contamination-free high-temperature work.
Muffle Furnaces are one of the most frequently used pieces of laboratory equipment in the plastic, polymer, rubber, ceramic, metallurgy, chemistry and material-testing industries - essential for any test where the polymer must be burned away completely so that only the inorganic residue (ash) remains.
Our Laboratory Muffle Furnace is built with a mild-steel outer body, powder-coated finish for long lab life, and a working chamber of 4 inch × 4 inch × 9 inch - a practical size that accommodates the standard porcelain or ceramic crucibles used for ash and carbon black content testing. Other chamber sizes can be supplied on request.
Temperature control is by a precision controller covering the full ambient-to-1150°C range - comfortably above the 800°C and 950°C burn temperatures used by ASTM D 1603 (carbon black content) and the related ash-content standards. The refractory-lined chamber heats up cleanly and holds it stable while the sample is burned to completion - typically a 30-minute to several-hour cycle.
The chamber design and refractory lining minimise heat loss, give fast warm-up, and protect the sample from contamination by flue gases or heating element materials - delivering accurate, reproducible ash percentages and long-term durability for high-volume daily testing.
Contact International Equipments today for a personalised quotation. Tell us your typical sample size, target burn temperature and the test standards you follow - our team will recommend the right chamber size, suggest matching companion equipment and share pricing, delivery timeline and the list of leading polymer and pipe manufacturers already using our Muffle Furnaces.
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