SIST EN ISO 17855-2:2025 PDF

Overview

SIST EN ISO 17855-2:2025 is the internationally recognized standard developed by CEN and ISO for the preparation and testing of polyethylene (PE) moulding and extrusion materials. This standard focuses on methods for creating test specimens and the procedures for determining mechanical, thermal, physical, and electrical properties of PE materials. By providing unified guidelines for specimen preparation, material handling, and test conditions, SIST EN ISO 17855-2:2025 ensures the accuracy, reproducibility, and comparability of test results throughout the plastics industry.

This document is essential for manufacturers, laboratories, and quality assurance teams involved with thermoplastic materials, offering a harmonized approach to evaluating the performance and conformity of PE used in a wide range of moulding and extrusion applications.

Key Topics

• Preparation of Test Specimens

  • Specifies standard procedures for injection and compression moulding of PE materials into test specimens
  • Outlines conditions such as temperature, pressure, and cooling rates for different PE grades

• Conditioning of Materials and Specimens

  • Details pre-moulding treatment and post-moulding conditioning to ensure consistency in testing
  • Defines requirements regarding temperature, humidity, and time for specimen conditioning

• Test Methods for Property Determination

  • Lists general and specialized test methods to characterize key properties, including those referenced in ISO 10350-1 and ISO 17855-1
  • Covers measurement of tensile strength, impact resistance, electrical properties, density, and environmental stress cracking

• Reproducibility and Comparability

  • Emphasizes the necessity of using specified specimen dimensions and preparation protocols
  • Stresses that only results from specimens prepared by these methods are directly comparable

• Reference to Additional Methods

  • Includes further test methods widely used for PE or particularly significant for certain applications, such as slow crack growth for piping systems

Applications

SIST EN ISO 17855-2:2025 has broad practical value across multiple sectors where polyethylene moulding and extrusion materials are critical:

• Product Development

  • Enables material selection and validation based on standardized property data
  • Supports innovation in packaging, construction, automotive, and consumer products through reliable material performance assessment

• Quality Assurance & Control

  • Provides manufacturers with a basis for consistent and repeatable material testing
  • Ensures batch-to-batch uniformity and compliance with industry requirements

• Testing Laboratories

  • Facilitates timely and cost-efficient testing by establishing clear protocols
  • Allows for direct comparison of material properties between suppliers or across international markets

• Regulatory and Certification Processes

  • Helps demonstrate conformity to material and product standards required for market access
  • Essential for certifying PE materials used in safety-critical applications, such as piping systems

Related Standards

• ISO 17855-1: Designation system and specifications for PE moulding and extrusion materials
• ISO 10350-1: Acquisition and presentation of comparable single-point data for plastics
• ISO 293, ISO 294-1/-3/-4: Moulding procedures for thermoplastic test specimens
• ISO 20753: Standard dimensions for plastic test specimens
• ISO 16241, ISO 18488, ISO 18489, ISO 22088-2, ISO 16770: Additional methods, particularly for slow crack growth and environmental stress analysis
• ISO 527-2, ISO 178, ISO 179: Mechanical property test standards for plastics
• ISO 1133-1, ISO 1183-1/2/3: Flow properties and density measurement protocols
• IEC and ASTM standards: Coverage of electrical, burning, and stress cracking properties

By adopting SIST EN ISO 17855-2:2025, organizations can ensure compliance, optimize testing processes, and facilitate the global trade of polyethylene moulding and extrusion materials aligned with the latest quality and safety benchmarks.