Importance of Rubber Testing
Vulcanized rubber or rubber products are tested in the laboratories before commencing the process of manufacturing for physical analysis, chemical analysis, and mechanical measuring, etc. Before the manufacturing process, the rubbers are tested to determine various parameters of the material such as moisture volume, melting point, dry mass volume, the percentage of ash and other volatile substances, determination of liquid sample viscosity, the specification of effective substance volume, specifications of heavy metals and rubber toxicants. Determining the ash content in the vulcanized rubbers or synthetic rubbers is an important factor that helps to control the quality of the rubbers. It is done basically to find the component of ash in a material.
Ash Content – A Major Property of Rubbers
For ash determination, a specific amount of rubber sample is taken and kept for combustion inside a testing instrument known as Muffle Furnace. This ash content is quantitatively measured, and percentage of ash content in a material is measured. It is an oven type lab testing machine which is designed to reach high temperatures i.e. maximum up to 900 degrees C, 1200 Degree C or 1400 Degree C. The testing machine is basically used to burn the compounds to determine the percentage of inorganic components in that compound.
Working principle of Muffle Furnaces
The testing instrument “Muffle Furnace” works on the principle of auto-igniting of organic materials due to high temperatures. It is an extremely suitable device which is used for determination of ash content in the vulcanized and synthetic rubbers. The instrument is capable enough to maintain the high temperature as it is insulated with high-quality of fire bricks and imported insulation. The device is manufactured all over the world as per the guidelines of the standards and international standards. It is s true chamber that provides exact heating conditions for accelerated exposures and tests. It is the best testing machine which is used in industries for metal treatment, wool industries, rubber industries and plastic industries for ash determination.
Muffle Furnace by Presto for Ash Determination
Presto Stantest manufacture premium quality of Muffle Furnace to measure the percent of non-volatile substance in a material by heating a material to a certain temperature.
Technical Specification of Presto’s Muffle Furnace
|S. No.||Technical specification||Value|
|1.||Display||16 x 2 alphanumerical LCD Display|
|3.||Tuning||Advance Auto-Tune PID temperature controlling with 0.1 degrees C resolution and accuracy.|
|4.||Sensor||J Type/K-type sensor as per selection of range|
|5.||Alarm Output is given||When the process starts and system stop when the temperature exceeds High Limit/Low Limit|
|6.||LEDs Indications||Heating, Timer, Alarm|
· The menu driven system allows the users to set multiple parameters easily· SSR-based output controls· RTC (Real Time Control)· PID parameters settable in menu
|9.||Timer||Timer Set Preset Value up to 99:99 Hours.|
|10.||Temperature Least Count||0.1 degree C|
|11.||Temperature Accuracy||± 5-7 degree C at full range|
|13.||Power Supply||16 Ampere, 220 V, AC single phase|
|14.||Inner Chamber Size||4x4x9, 5x5x10, 6x6x12 and customize size|
|15.||Outer Body||Mild Steel Powder Coated|
Standard Operating Procedure
By following the mentioned operating procedure, the manufacturers can measure the % of ash content in rubbers, plastics, and other polymers easily.