SIST EN 12877-2:2001

Overview

SIST EN 12877-2:2001 is a European standard developed by CEN that specifies a method for determining the colour stability to heat of colouring materials used in plastics, specifically under processing conditions by injection moulding. This standard is crucial for manufacturers and laboratories evaluating the thermal stability of colorants in thermoplastics, ensuring consistent product quality during plastics processing. The outcome of this test is a relative value of colour stability rather than an absolute measure.

Key Topics

• Colour Stability to Heat: The standard focuses on assessing how colouring materials respond to heat exposure during the injection moulding process.
• Injection Moulding Method: It outlines the procedure for sample preparation and testing using injection moulding, which is the most common industrial process for thermoplastics.
• Applicable Materials: The method applies to all thermoplastic materials that can be processed by injection moulding and are blended with colourants or pigments.
• Relative Value Determination: Results provide a comparative measure of how different colouring materials withstand thermal stress, supporting selection and quality control.
• Standardized Conditions: Testing is performed under defined and repeatable conditions to ensure reliability across different batches and laboratories.

Applications

SIST EN 12877-2:2001 is essential in various sectors of the plastics industry where colour consistency and stability are critical to product performance and aesthetic appeal. Key applications include:

• Quality Control: Manufacturers use this standard to verify the thermal stability of pigments and dyes in thermoplastic products, ensuring that colours remain stable during standard processing.
• Material Development: R&D departments test new colouring formulations for plastic materials, evaluating their ability to retain colour after exposure to processing temperatures.
• Supplier Assessment: Raw material suppliers and converters use the results specified by EN 12877-2 to demonstrate compliance and performance of their colouring products.
• Product Certification: End users and certifying bodies reference this standard during regulatory compliance checks and product approvals for sectors like automotive, electronics, packaging, and consumer goods.

Related Standards

• EN 12877-1: Colouring materials in plastics - Part 1: Determination by incorporation into polyvinyl chloride (PVC) – covers a different processing method and material substrate.
• ISO 18314: Analytical methods for colourant evaluation in plastics.
• EN ISO 4892: Plastics - Methods of exposure to laboratory light sources (for weathering and light stability testing).
• ISO 779: Pigments and extenders - Methods of dispersion and assessment of dispersibility in plastics.

SIST EN 12877-2:2001 provides a standardized approach for evaluating the heat stability of colouring materials in plastics by injection moulding. Adhering to this standard supports effective material selection, promotes consistent quality, and helps meet customer and regulatory requirements for coloured thermoplastic products. For organisations in the plastics industry, implementation of EN 12877-2 is a key component of robust quality assurance and product development processes.