GB/T 29284-2024Poly(lactic acid) (English PDF)

1 Scope

This document defines the terms and definitions of polylactic acid resins, specifies the classification, requirements, inspection rules, marking, packaging, transportation and storage, and describes

The corresponding test methods are described:

This document is applicable to polylactic acid (hereinafter referred to as PLA) resin obtained by polymerization using lactic acid or lactide as raw materials:

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document:

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to

This document:

GB/T 1033:1 Plastics - Determination of density of non-cellular plastics - Part 1: Immersion method, liquid pycnometer method and titration method

GB/T 1040:2 Determination of tensile properties of plastics Part 2: Test conditions for moulding and extruded plastics

GB/T 1043:1 Determination of impact properties of simply supported plastic beams Part 1: Non-instrumented impact test

GB/T 2547 Plastics Sampling Method

GB/T 2918 Standard environment for conditioning and testing of plastic specimens

GB/T 3682:1 Plastics Thermoplastics - Determination of melt mass flow rate (MFR) and melt volume flow rate (MVR)

Part 1: Standard methods

GB/T 8170 Rules for rounding off values and expression and determination of limit values

GB/T 9345:1 Determination of ash content in plastics Part 1: General method

GB/T 14190-2017 Test method for fiber-grade polyester (PET) chips

GB/T 17037:1 Plastics - Preparation of injection moulded test specimens for thermoplastic materials - Part 1: General principles and multi-purpose test specimens and long

Preparation of strip specimens

GB/T 19277:1 Determination of the ultimate aerobic biodegradability of materials under controlled composting conditions by measuring the carbon dioxide released

Methods Part 1: General methods

GB/T 19466:2 Plastics Differential Scanning Calorimetry (DSC) Part 2: Determination of Glass Transition Temperature

GB/T 19466:3 Plastics Differential Scanning Calorimetry (DSC) Part 3: Determination of Melting and Crystallization Temperature and Enthalpy

GB/T 37191 Determination of moisture content of raw rubber - Karl Fischer method

3 Terms and definitions

The following terms and definitions apply to this document:

3:1

Polylactide

A polymer obtained by chemical synthesis using lactic acid or lactide, a dimer of lactic acid, as a monomer and having the chemical structure shown in Figure 1: […]