Types of Electric Furnaces for Determining Carbon Black and Filler Content

The PolymerTest Electric Furnace is a specialized instrument designed for determining Carbon Black content and Ash content in polyolefins and rubber. Unlike standard furnaces, it features a precise Nitrogen gas control system for pyrolysis in an inert atmosphere. Equipped with high-grade Kanthal A1 elements and quartz glassware, it ensures strict compliance with ASTM D1603 and ISO 6964.

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Description

Introduction to Electric Furnace for Carbon Black and Ash Content

In the polymer industry, knowing the exact amount of additives (such as carbon black and mineral fillers) is vital for controlling the quality of polyethylene pipes and rubber parts. The Electric Furnace for Carbon Black Testing manufactured by Polymer Test, unlike ordinary ash furnaces, is equipped with a system that allows for precise control of the atmosphere inside the furnace.

Operating Mechanism: Pyrolysis in Inert Atmosphere

To measure Carbon Black Content, the sample must not be burned (oxidized) but rather thermally decomposed (pyrolyzed). Therefore, this device is equipped with the following essential components:

Nitrogen Gas System: Includes connection for cylinder, regulator, and a precise flow meter to replace oxygen with nitrogen during the first phase of the test.
Quartz/Pyrex Glassware: Heat-resistant tubes that contain the sample boat and direct the nitrogen gas flow over it.
Kanthal Elements (A1): Utilizes the best Swedish heating wires that do not deform or burn out even at temperatures up to 1200°C.

Temperature Precision and Control

This furnace utilizes high-precision Type K thermocouples and a PID controller that displays temperature with a resolution of 1°C. Temperature stability is crucial in the Ash Content test to ensure the remaining weight is accurate.

Completing Laboratory Equipment

This device is typically used alongside the Melt Flow Index (MFI) Tester to verify raw material (granule) quality before production. The combination of Carbon Black Content and MFI results constitutes the complete “identity card” of your incoming materials.

International Standards

This device is designed and manufactured exactly according to the requirements of the following standards:

Standard ASTM D1603 (Test Method for Carbon Black Content in Olefin Plastics).
Standard ISO 6964 (Determination of carbon black content in polyethylene pipes and fittings).
Standard ISO 3451 (Determination of Ash).

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