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Significance and Use
5.1 Recycled plastic materials may contain incompatible plastic or other undesirable contaminants that could affect the processing or quality, or both, of the plastic prepared for reuse. Techniques to separate and identify incompatible plastics, moisture, chemicals, or original product residues, and solid contaminants such as metals, paper, glass, and wood are essential to the processing of recycled plastic materials.
5.2 This guide lists existing ASTM and ISO methods plus currently practiced industrial techniques for identification and classification of contaminants in recycled plastics flake or pellets.
1.1 This guide is intended to provide information on available methods for the separation and classification of contaminants such as moisture, incompatible polymers, metals, adhesives, glass, paper, wood, chemicals, and original-product residues in recycled plastic flakes or pellets. Although no specific methods for identification or characterization of foam products are included, foam products are not excluded from this guide. The methods presented apply to post-consumer plastics.
1.2 For specific procedures existing as ASTM test methods, this guide only lists the appropriate reference. Where no current ASTM standard exists, however, this guide gives procedures for the separation or identification, or both, of specific contaminants. lists the tests and the specific contaminant addressed by each procedure.
1.3 This guide does not include procedures to quantify the contaminants unless this information is available in referenced ASTM standards.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: There is no known ISO equivalent to this standard.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ISO StandardsISO 1183-1987 Methods for Determining the Density and Relative Density of Noncellular Plastics ISO 3451/1-1981
D789 Test Method for Determination of Relative Viscosity of Concentrated Polyamide (PA) Solutions
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
D1003 Test Method for Haze and Luminous Transmittance of Transparent Plastics
D1193 Specification for Reagent Water
D1238 Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer
D1457 Specification for Polytetrafluoroethylene (PTFE) Molding and Extrusion Materials
D1505 Test Method for Density of Plastics by the Density-Gradient Technique
D1898 Practice for Sampling of Plastics
D1925 Test Method for Yellowness Index of Plastics
D3418 Test Method for Transition Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry
D4019 Test Method for Moisture in Plastics by Coulometric Regeneration of Phosphorus Pentoxide
D5033 Guide for Development of ASTM Standards Relating to Recycling and Use of Recycled Plastics
D5227 Test Method for Measurement of Hexane Extractable Content of Polyolefins
E169 Practices for General Techniques of Ultraviolet-Visible Quantitative Analysis
E355 Practice for Gas Chromatography Terms and Relationships
E682 Practice for Liquid Chromatography Terms and Relationships
E794 Test Method for Melting And Crystallization Temperatures By Thermal Analysis
E1252 Practice for General Techniques for Obtaining Infrared Spectra for Qualitative Analysis
ICS Number Code 13.030.50 (Recycling); 83.080.01 (Plastics in general)
UNSPSC Code 13100000(Rubber and elastomers)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D5577-19, Standard Guide for Techniques to Separate and Identify Contaminants in Recycled Plastics, ASTM International, West Conshohocken, PA, 2019, www.astm.orgBack to Top