BS EN ISO 22007-2:2022 - Plastics. Determination of thermal conductivity and thermal diffusivity Transient plane heat source (hot disc) method

Standard Number: BS EN ISO 22007-2:2022

Pages: 30

Released: 2022-08-08

ISBN: 978 0 539 15571 6

Status: Standard

Overview

The BS EN ISO 22007-2:2022 standard is an essential document for professionals in the plastics industry, providing a comprehensive methodology for determining the thermal conductivity and thermal diffusivity of plastics using the transient plane heat source (hot disc) method. This standard is crucial for ensuring the quality and performance of plastic materials in various applications, from consumer goods to industrial components.

Key Features

• Accurate Measurement: The transient plane heat source (hot disc) method outlined in this standard offers precise and reliable measurements of thermal conductivity and thermal diffusivity, ensuring that your plastic materials meet the required thermal performance criteria.
• Comprehensive Guidelines: With 30 pages of detailed instructions, this standard provides thorough guidelines on the preparation, execution, and interpretation of thermal conductivity and diffusivity tests.
• Up-to-Date Information: Released on August 8, 2022, this standard incorporates the latest advancements and best practices in the field, ensuring that you are working with the most current and relevant information.
• International Recognition: As a part of the ISO (International Organization for Standardization) series, this standard is recognized and respected globally, facilitating international trade and collaboration.

Applications

This standard is applicable to a wide range of industries and applications, including but not limited to:

• Automotive: Ensuring the thermal performance of plastic components used in vehicles, such as dashboards, interior panels, and under-the-hood parts.
• Electronics: Evaluating the thermal properties of plastic materials used in electronic devices, ensuring efficient heat dissipation and preventing overheating.
• Construction: Assessing the thermal conductivity of plastic materials used in building insulation, windows, and other construction elements to enhance energy efficiency.
• Consumer Goods: Testing the thermal properties of plastic materials used in household items, ensuring safety and performance in everyday products.

Benefits

Implementing the BS EN ISO 22007-2:2022 standard in your testing procedures offers numerous benefits, including:

• Enhanced Product Quality: By accurately measuring the thermal properties of your plastic materials, you can ensure that your products meet the highest quality standards and perform reliably in their intended applications.
• Regulatory Compliance: Adhering to this internationally recognized standard helps you comply with industry regulations and standards, reducing the risk of non-compliance issues.
• Competitive Advantage: Demonstrating your commitment to quality and precision through the use of this standard can enhance your reputation and give you a competitive edge in the market.
• Cost Savings: By identifying and addressing thermal performance issues early in the development process, you can avoid costly redesigns and product failures, ultimately saving time and resources.

Detailed Content

The BS EN ISO 22007-2:2022 standard covers a range of topics essential for the accurate determination of thermal conductivity and diffusivity in plastics, including:

• Introduction: An overview of the importance of thermal conductivity and diffusivity measurements in plastics and the principles behind the transient plane heat source (hot disc) method.
• Scope: A detailed description of the scope of the standard, including the types of plastics and testing conditions covered.
• Definitions: Clear definitions of key terms and concepts related to thermal conductivity and diffusivity, ensuring a common understanding among users.
• Apparatus: Specifications for the equipment and materials required to perform the tests, including the hot disc sensor and associated measurement devices.
• Test Specimens: Guidelines for the preparation and conditioning of test specimens to ensure accurate and consistent results.
• Test Procedure: Step-by-step instructions for conducting the tests, including the setup, measurement, and data analysis processes.
• Calculation and Expression of Results: Methods for calculating thermal conductivity and diffusivity from the test data, along with guidelines for reporting the results.
• Precision and Bias: Information on the precision and potential sources of bias in the test method, helping users understand the limitations and accuracy of their measurements.
• Annexes: Additional information and examples to support the implementation of the standard, including calibration procedures and troubleshooting tips.

Why Choose BS EN ISO 22007-2:2022?

Choosing the BS EN ISO 22007-2:2022 standard for your thermal conductivity and diffusivity testing needs ensures that you are working with a reliable, accurate, and internationally recognized methodology. This standard provides the detailed guidance and comprehensive information necessary to achieve precise and consistent results, helping you maintain the highest quality standards in your plastic materials and products.

Conclusion

The BS EN ISO 22007-2:2022 standard is an invaluable resource for professionals in the plastics industry, offering a robust and reliable method for determining the thermal conductivity and diffusivity of plastic materials. By implementing this standard in your testing procedures, you can ensure the quality, performance, and compliance of your products, ultimately enhancing your reputation and competitiveness in the market.

BS EN ISO 22007-2:2022

This standard BS EN ISO 22007-2:2022 Plastics. Determination of thermal conductivity and thermal diffusivity is classified in these ICS categories:

• 83.080.01 Plastics in general

This document specifies a method for the determination of the thermal conductivity and thermal diffusivity, and hence the specific heat capacity per unit volume of plastics. The experimental arrangement can be designed to match different specimen sizes. Measurements can be made in gaseous and vacuum environments at a range of temperatures and pressures. This method gives guidelines for testing homogeneous and isotropic materials, as well as anisotropic materials with a uniaxial structure. The homogeneity of the material extends throughout the specimen and no thermal barriers (except those next to the probe) are present within a range defined by the probing depth(s) (see 3.1). The method is suitable for materials having values of thermal conductivity, ?, in the approximate range 0,010 W?m?1?K?1 < ? < 500 W?m?1?K?1, values of thermal diffusivity, ?, in the range 5 × 10?8 m2?s?1 < ? < 10?4 m2?s?1, and for temperatures, T, in the approximate range 50 K < T < 1 000 K. NOTE 1   The specific heat capacity per unit volume, C, C = ? ? cp, where ? is the density and cp is the specific heat per unit mass and at constant pressure, can be obtained by dividing the thermal conductivity, ?, by the thermal diffusivity, ?, i.e. C = ?/?, and is in the approximate range 0,005 MJ?m?3?K?1 < C < 5 MJ?m?3?K?1. It is also referred to as the volumetric heat capacity. NOTE 2   If the intention is to determine the thermal resistance or the apparent thermal conductivity in the through-thickness direction of an inhomogeneous product (for instance a fabricated panel) or an inhomogeneous slab of a material, reference is made to ISO 8301, ISO 8302 and ISO 472. The thermal-transport properties of liquids can also be determined, provided care is taken to minimize thermal convection.