Insulation thermal stability test device compliant with TS 7423 and EN 60811-3-2 standards

In industries such as cable manufacturing, plastics, rubber processing, automotive, white goods and electrical equipment, insulation materials must withstand demanding environmental conditions. These materials are exposed to heat, humidity, mechanical stress, and chemical effects throughout their service life. For this reason, determining the thermal stability of insulation materials—meaning their ability to maintain structure, performance and insulation capability under elevated temperatures—is a critical quality and safety requirement.

The Insulation Thermal Stability Test Device is designed specifically for evaluating how polymer-based insulation materials behave when subjected to controlled high-temperature conditions. By following internationally accepted test principles, the device enables manufacturers to verify material stability, compare formulations, ensure batch consistency, and meet certification requirements. Its role in production quality control is fundamental for ensuring reliable and long-lasting insulation performance.

Main Purpose of the Device

The primary purpose of the Insulation Thermal Stability Test Device is to determine how insulation materials respond to a defined temperature for a specific duration. The device evaluates:

The degree of chemical degradation occurring under heat exposure,
Stability level of cable sheath, plastic or rubber materials,
The comparative performance of different raw material batches,
Compliance with technical requirements defined in standards.

By providing controlled, repeatable and accurate test conditions, the device ensures that the thermal behaviour of insulation materials can be measured objectively.

What Is the Thermal Stability Test?

The thermal stability test consists of exposing a sample to a constant high temperature for a specified period. During this exposure, polymer materials may undergo chemical reactions such as decomposition, oxidation or breakdown of additives. These changes are then evaluated according to the criteria outlined in relevant standards.

The test reveals how long the material can maintain its expected performance under elevated temperatures and how resistant it is to heat-induced deterioration. This makes the method essential for predicting long-term material behaviour.

Importance and Purpose of the Test

The thermal stability test is crucial for several reasons:

It determines whether an insulation material can remain safe and functional under real-world temperature conditions.
It helps detect chemical degradation that may occur over time in cable sheaths and polymer components.
It supports production quality control by revealing differences between batches or suppliers.
It guides material development and formulation optimization in R&D processes.
It provides documented evidence of compliance for certification, market approval and export requirements.

By establishing the material’s thermal resistance level, the test ensures reliability, durability and safety across various industrial applications.

Scientific Basis of the Test

The scientific foundation of thermal stability testing lies in the thermal behaviour of polymer chains. When polymers are exposed to heat, they may undergo:

Chain scission,
Loss of stabilizers or additives,
Oxidation or other degradation reactions,
Structural changes that weaken electrical and mechanical properties.

The rate and extent of these reactions depend on temperature, time and material composition. By applying a controlled heat source and evaluating the resulting changes, the device provides a measurable indication of the material’s thermal resistance.

This approach is based on polymer chemistry, thermal degradation kinetics and the evaluation of physical-chemical changes induced by heat.

Device Operation

The operation of the Insulation Thermal Stability Test Device follows a structured and user-friendly process:

Sample Preparation
The cable sheath, plastic strip or rubber piece is prepared in accordance with the test standards.
Placement
Samples are positioned in the dedicated test section of the device.
Setting Parameters
The required temperature and test duration are set using the control panel.
Thermal Exposure
The device heats the sample to the selected temperature and maintains it consistently throughout the test period.
Evaluation
After exposure, the material is examined and results are compared to the criteria outlined in the standards.

This workflow enables accurate, repeatable and efficient laboratory testing.

Technical Information

The device is designed to meet the precision requirements of thermal stability evaluation:

Digitally controlled system for accurate temperature and time settings,
Multi-sample testing capability for increased laboratory efficiency,
Homogeneous heat distribution for consistent thermal exposure,
Stable and reliable performance supported by advanced control components,
User-friendly interface ensuring ease of operation and minimal operator error.

These technical features make the device suitable for continuous use in production laboratories, R&D facilities and independent testing centers.

Advantages

Technical Advantages

Precise temperature control ensures reliable and repeatable results.
Ability to test multiple samples simultaneously increases productivity.
Stable heating system maintains uniform temperature across all samples.
Digital control panel improves accuracy and reduces handling errors.

Contribution to Quality Control

Facilitates verification of raw materials before production.
Detects formulation or process variations during manufacturing.
Enhances long-term reliability of insulation materials by identifying heat-related weaknesses early.

Export and Certification Support

Provides test outputs required for product certification and compliance files.
Helps manufacturers meet international technical expectations.
Strengthens market reputation through documented conformity with standards.

Application Areas (with Importance)

Cable Manufacturers: Ensures that cable sheaths maintain electrical insulation and structural integrity under elevated temperatures.
Plastic and Rubber Producers: Helps classify and validate raw materials used in high-temperature environments.
Automotive Industry: Critical for components exposed to engine heat and under-hood conditions.
White Goods Manufacturers: Supports safety and performance verification of plastic and insulated components.
R&D Laboratories: Enables comparison of formulations and supports material development.

Standards

TS 7423
Defines the methods used for testing insulation materials in electrical cables. Specifies the thermal stability test conditions, evaluation criteria and sample preparation procedures. Ensures consistency and comparability of test results within national markets.

EN 60811-3-2
A European standard specifying environmental and physical test methods for insulation and sheath materials used in cables. It includes the thermal stability test procedure, temperature requirements and guidelines for evaluating results. Compliance with this standard ensures acceptance in international markets.

Conclusion

The Insulation Thermal Stability Test Device is an essential tool for evaluating the durability and performance of insulation materials used in cables, plastics and rubber components. Its ability to provide controlled, repeatable and standard-compliant test conditions makes it indispensable for quality control, product development and certification processes.

By meeting the requirements of TS 7423 and EN 60811-3-2, the device supports manufacturers in producing safer, more reliable and internationally recognized products. It strengthens technical assurance, enhances market competitiveness and ensures long-term material performance.

Insulation Thermal Stability Test Device