ISO 1268-8:2004

Overview

ISO 1268-8:2004 establishes standardized procedures for the preparation of test plates from fibre-reinforced thermosetting moulding compounds using compression moulding techniques. The standard specifically covers sheet moulding compound (SMC) and bulk moulding compound (BMC), which are widely used in the production and testing of fibre-reinforced plastics. By outlining clear general principles and step-by-step procedures, ISO 1268-8:2004 ensures that test plates are produced under conditions that yield reliable and representative test results for material evaluation, quality control, and product development.

Key Topics

• Material Types: Focuses on SMC and BMC, two prevalent forms of fibre-reinforced thermosetting moulding compounds.
• Compression Moulding Methods: Describes two different approaches for preparing the mould charge:
  • Method A: For moulding without the material flowing in the mould, ensuring alignment with fibre orientation and minimizing flow-induced anisotropy.
  • Method B: For moulding where material flow is required, simulating real-life processing and accommodating flow-induced effects.
• Test Plate Preparation: Covers recommended plate dimensions, sampling, conditioning, and step-by-step moulding protocols.
• Moulding Conditions: Specifies requirements for press capability, mould design, temperature, pressure, and cooling procedures.
• Quality Documentation: Mandates thorough reporting of materials, methods, and any deviations or incidents affecting plate quality.

Applications

ISO 1268-8:2004 is invaluable for laboratories, manufacturers, and quality assurance teams working with fibre-reinforced plastics. Its applications include:

• Test Specimen Preparation: Enables the production of consistent, standardized test plates from which various test specimens can be cut for mechanical, thermal, chemical, and physical property evaluation.
• Research and Development: Establishes reliable baseline procedures for the investigation and comparison of new fibre-reinforced plastic formulas and moulding techniques.
• Process Optimization: Assists manufacturing engineers in understanding material behavior during compression moulding, streamlining the design of industrial moulds for SMC and BMC products.
• Quality Assurance: Supports conformity assessment and certification, ensuring that test results are repeatable and directly comparable across different laboratories and production sites.
• Health and Safety Compliance: Reinforces adherence to local safety regulations during sample handling and processing of composite materials.

Related Standards

For comprehensive material testing and compatibility with industry benchmarks, ISO 1268-8:2004 references and aligns with the following standards:

• ISO 1268 Series: Other parts describe test plate preparation for alternative fibre-reinforced plastic processing methods (e.g., injection moulding, filament winding).
• ISO 12115: Specifies test procedures for determining flowability, maturation, and shelf life of thermosetting compounds.
• EN 1842: Focuses on compression moulding shrinkage in thermoset moulding compounds.
• ISO 179, ISO 527, ISO 14125, ISO 14126: For testing mechanical properties such as impact, tensile, flexural, and compressive characteristics.
• ISO 75, ISO 11359: Procedures for thermal property evaluation of plastics.
• IEC 60093, IEC 60112, IEC 60243, IEC 60250: Cover electrical insulating properties testing.
• ISO 62, ISO 1183, ISO 2577: Assessment of chemical, physical, and density properties.
• ISO 3795, ISO 4589, IEC 60695: Fire and burning behaviour test methods for plastics.

By adhering to ISO 1268-8:2004, organizations benefit from internationally recognized best practices in compression moulding of fibre-reinforced plastics, supporting high-quality material testing, reliable product development, and robust quality assurance systems.