BS EN ISO 178:2019 - Plastics. Determination of Flexural Properties

Welcome to the definitive guide for understanding the flexural properties of plastics with the BS EN ISO 178:2019 standard. This comprehensive document is an essential resource for professionals in the plastics industry, providing detailed methodologies for determining the flexural properties of plastic materials. Released on May 16, 2019, this standard is a critical tool for ensuring quality and consistency in plastic products.

Overview of BS EN ISO 178:2019

The BS EN ISO 178:2019 standard is a meticulously crafted document that outlines the procedures for testing the flexural properties of plastics. This standard is crucial for manufacturers, quality assurance professionals, and researchers who are involved in the production and testing of plastic materials. By adhering to this standard, you can ensure that your products meet the necessary quality benchmarks and perform reliably in their intended applications.

Key Features

• Standard Number: BS EN ISO 178:2019
• Pages: 32
• Release Date: May 16, 2019
• ISBN: 978 0 580 92959 5
• Status: Standard

Why Choose BS EN ISO 178:2019?

Choosing the BS EN ISO 178:2019 standard means opting for precision, reliability, and industry compliance. This standard is recognized globally, making it a valuable asset for companies that operate on an international scale. By implementing the guidelines set forth in this document, you can enhance the credibility of your products and gain a competitive edge in the market.

Benefits of Using This Standard

• Consistency: Ensure uniformity in testing procedures across different batches and production lines.
• Quality Assurance: Maintain high standards of quality by adhering to internationally recognized testing methods.
• Market Acceptance: Gain acceptance in global markets by complying with a widely recognized standard.
• Risk Mitigation: Reduce the risk of product failure by thoroughly understanding the flexural properties of your materials.

Detailed Content

The BS EN ISO 178:2019 standard spans 32 pages, each filled with detailed instructions and guidelines. It covers various aspects of flexural testing, including:

• Test Specimen Preparation: Guidelines on how to prepare test specimens to ensure accurate and reliable results.
• Testing Equipment: Specifications for the equipment required to conduct flexural tests.
• Testing Procedures: Step-by-step instructions on how to perform the tests, including loading rates and environmental conditions.
• Data Analysis: Methods for analyzing test data to determine the flexural properties of the material.

Who Should Use This Standard?

The BS EN ISO 178:2019 standard is designed for a wide range of professionals, including:

• Manufacturers: Ensure your products meet industry standards and customer expectations.
• Quality Assurance Teams: Implement rigorous testing protocols to maintain product quality.
• Researchers: Conduct accurate and reliable research on the flexural properties of new materials.
• Regulatory Bodies: Use the standard as a benchmark for compliance and certification processes.

Conclusion

In the ever-evolving world of plastics, staying ahead of the curve is essential. The BS EN ISO 178:2019 standard provides the tools and knowledge necessary to ensure your products are of the highest quality. By following the guidelines outlined in this document, you can achieve consistency, reliability, and market acceptance. Invest in the future of your products by embracing this essential standard today.

BS EN ISO 178:2019

This standard BS EN ISO 178:2019 Plastics. Determination of flexural properties is classified in these ICS categories:

• 83.080.01 Plastics in general

This document specifies a method for determining the flexural properties of rigid and semi-rigid plastics under defined conditions. A preferred test specimen is defined, but parameters are included for alternative specimen sizes for use where appropriate. A range of test speeds is included.

The method is used to investigate the flexural behaviour of the test specimens and to determine the flexural strength, flexural modulus and other aspects of the flexural stress/strain relationship under the conditions defined. It applies to a freely supported beam, loaded at midspan (three-point loading test).

The method is suitable for use with the following range of materials:

• thermoplastic moulding, extrusion and casting materials, including filled and reinforced compounds in addition to unfilled types; rigid thermoplastics sheets;

• thermosetting moulding materials, including filled and reinforced compounds; thermosetting sheets.

In agreement with ISO 10350‑1^[5] and ISO 10350‑2^[6], this document applies to fibre-reinforced compounds with fibre lengths ≤7,5 mm prior to processing. For long-fibre-reinforced materials (laminates) with fibre lengths >7,5 mm, see ISO 14125^[7].

The method is not normally suitable for use with rigid cellular materials or sandwich structures containing cellular material. In such cases, ISO 1209‑1^[3] and/or ISO 1209‑2^[4] can be used.

NOTE 1 For certain types of textile-fibre-reinforced plastic, a four-point bending test is used. This is described in ISO 14125.

The method is performed using specimens which can be either moulded to the specified dimensions, machined from the central section of a standard multipurpose test specimen (see ISO 20753) or machined from finished or semi-finished products, such as mouldings, laminates, or extruded or cast sheet.

The method specifies the preferred dimensions for the test specimen. Tests which are carried out on specimens of different dimensions, or on specimens which are prepared under different conditions, can produce results which are not comparable. Other factors, such as the test speed and the conditioning of the specimens, can also influence the results.

NOTE 2 Especially for injection moulded semi-crystalline polymers, the thickness of the oriented skin layer, which is dependent on the moulding conditions, also affects the flexural properties.

The method is not suitable for the determination of design parameters but can be used in materials testing and as a quality control test.