Overview
SIST EN ISO 1624:2002 specifies a standardized test method for the sieve analysis in water of vinyl chloride homopolymer and copolymer resins. Developed through collaboration between ISO and CEN, this European and International Standard helps manufacturers and quality control laboratories consistently determine the particle size distribution of polyvinyl chloride (PVC) resins. Sieve analysis in water is particularly important for accurate characterization, as it minimizes errors caused by static electricity which can affect dry sieving, making the procedure especially relevant for emulsion PVC resins.
This standard facilitates quality assurance, product development, and conformity assessments for thermoplastic materials in accordance with international best practices.
Key Topics
- Scope: Specifies methods to determine sieve retention in vinyl chloride homopolymer and copolymer resins.
- Principle: Sieving is performed under a stream of water with wetting agents to ensure reproducible results and minimize static electricity.
- Apparatus: Utilizes a series of standard sieves (commonly 0.250 mm and 0.063 mm), precision balances, ovens, water filtering systems, and specialized sprinkling devices.
- Sample Preparation: Involves dispersing the resin in water with wetting agents and sieving under running water.
- Residue Determination: Allows for measurement of mass of particles retained on each sieve by drying and weighing, ensuring accuracy of results.
- Repeatability and Reproducibility: Includes guidelines on performing duplicate determinations and prescribed tolerances for acceptable results.
- Reporting Requirements: Details information to be included in test reports-sample identification, quantities used, residue percentages, and test conditions.
Applications
SIST EN ISO 1624:2002 is essential in various scenarios in the plastics and polymer industry:
- Quality Control: Routine testing of vinyl chloride resin batches to ensure particle size distribution meets specified requirements for manufacturing consistency.
- Process Optimization: Supports PVC resin producers in adjusting polymerization processes for optimal product characteristics.
- Product Development: Enables research and development teams to evaluate and compare new formulations or production methods.
- Regulatory Compliance: Assists organizations in meeting international and European regulatory standards for thermoplastic materials.
- Supplier Evaluation: Provides a common reference for buyers and suppliers to agree on resin quality using harmonized test methods.
- Certification: Used by certification bodies and third-party laboratories as part of official audits and product certification programs.
Related Standards
Organizations working with SIST EN ISO 1624:2002 often consult related standards to support broader testing and compliance objectives:
- ISO 565: Specifies nominal sizes of openings for test sieves-integral to conducting sieve analysis.
- EN ISO 1624:2001: European-adopted version, aligned with SIST EN ISO 1624:2002.
- ISO/TC 61 Standards: Series of standards developed by ISO Technical Committee 61 for plastics testing, including other properties of vinyl chloride materials.
- ICS 83.080.20: Classification for thermoplastic materials, providing context for selecting related testing and material standards.
Summary
SIST EN ISO 1624:2002 delivers a reliable, repeatable test method for determining the sieve retention of vinyl chloride homopolymer and copolymer resins in water. Adhering to this standard supports compliance, efficient production, and sustained quality in the manufacturing and supply of PVC resins, reinforcing trust and collaboration throughout the plastics industry supply chain.
