Overview
ISO 472:2013/Amd 1:2018 is an important amendment to the ISO 472:2013 standard, which defines terminology related to plastics. Published by the International Organization for Standardization (ISO), this amendment adds new terms and definitions essential for the plastics industry. The standard ensures clear and consistent communication among professionals by providing updated vocabulary that covers advancements and specific concepts in plastic materials and processing.
Key Topics
This amendment introduces additional terms and detailed definitions to support comprehensive understanding in the field of plastics. Important concepts covered include:
- Ageing: Describes irreversible chemical and physical changes in a material over time.
- Chlorinated Poly(vinyl chloride) (PVC-C): A type of PVC modified by controlled chlorination to enhance properties.
- Compressive Strength: Maximum stress a material withstands under compression, measured in megapascals.
- Critical Energy Release Rate (G_IC) and Critical Stress Intensity Factor (K_IC): Key fracture toughness parameters crucial for evaluating material resistance to crack propagation.
- Laminate: Product formed by bonding multiple layers of materials to improve performance.
- Polymer Blend and Alloy: Mixtures of different polymers, with alloys involving immiscible polymers united for enhanced properties.
- Reinforced Plastics: Plastics embedded with reinforcement materials to improve strength and durability.
- Miscibility: The ability of components to form a uniform single phase, essential for polymer blends.
- Polycondensation: Polymer formation through condensation reactions involving molecules of different sizes.
- Resin Transfer Moulding (RTM): A closed-mould process injecting resin into pre-set reinforcement materials.
- Terms related to molding: Including definitions for gate configurations, degating, and transfer molding processes.
- Mechanical and Physical Properties: Definitions such as Poisson's ratio, toughness, damping, and strain amplitude to guide material characterization.
- Advanced polymer structures: Interpenetrating polymer networks (IPN), semi-IPNs, ladder polymers, comb polymers, isotactic polymers, expanding the vocabulary for complex polymer architectures.
- Environmental and processing conditions: Pot life of adhesives, test atmosphere, and internal plasticizers enhancing processing and application understanding.
Applications
The updated vocabulary in ISO 472:2013/Amd 1:2018 is invaluable for:
- Material Specification and Selection: Enabling precise specification of plastics based on mechanical, chemical, and physical properties.
- Manufacturing Processes: Clear terminology for injection molding, transfer molding, and resin transfer molding improve process control and quality assurance.
- Research & Development: Facilitates innovation and comparative analysis by standardizing advanced polymer concepts and terminology.
- Quality Control and Testing: Terminology supports uniform interpretation of tests like fracture toughness, compressive strength, and strain amplitude.
- Technical Communication: Ensures consistent understanding between manufacturers, engineers, suppliers, and regulatory bodies worldwide.
- Regulatory Compliance and Documentation: Standardized terms simplify compliance reporting and official documentation.
Related Standards
Professionals using ISO 472:2013/Amd 1:2018 should consider complementary ISO and IEC standards relevant to plastics and polymer materials, including:
- ISO 1183: Methods for determining the density of plastics.
- ISO 527: Tensile testing of plastics.
- ISO 1133: Determination of melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics.
- ISO 291: Plastics - Standard atmospheres for conditioning and testing.
- IEC 60216: Electrical insulating materials’ electrical endurance.
- Other specialized ISO/TC 61 standards on plastic testing, classification, and polymer terminology.
Keywords: ISO 472 Amendment, plastics vocabulary, polymer terminology, reinforced plastics, polymer blends, resin transfer molding, compressive strength, fracture toughness, plastic materials standards, plastic processing terminology, international plastics standards.
