1 Scope
This standard specifies the testing methods for the analysis items of fiber grade polyester chip (PET).
This standard is applicable to the polyester chips made of terephthalic acid and ethanediol; other functional polyester may make reference to this standard.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
GB/T 601 Chemical Reagent - Preparations of Standard Volumetric Solutions
GB/T 603 Chemical Reagent - Preparations of Reagent Solutions for Use in Test Methods
GB/T 4146 Textile Terms and Terminology (Parts of Chemical Fibers)
GB/T 6678 General Principles for Sampling Chemical Products
GB/T 6682 Water for Analytical Laboratory Use-Specification and Test Methods
GB/T 8170 Rules for Rounding off of Numerical Values
ISO 3105 Glass Capillary Kinematic Viscometers - Specification and Operating Instructions
3 Terms and Definitions
For the purpose of this Standard, the following terms and definitions as well as those specified in GB/T 4146 apply.
3.1
Bright polyester chip
Polyester chip with titanium dioxide content less than or equal to 0.12% (mass fraction)
3.2
Semi-dull polyester chip
Polyester chip with titanium dioxide content greater than 0.12% and less than or equal to 0.5% (mass fraction).
Contents
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 General Principles for Testing
4.1 Sampling
4.2 Safety Warning
4.3 General Requirements
5 Testing Methods
5.1 Testing Method of Intrinsic Viscosity
5.2 Testing Method of Diethylene Glycol
5.3 Testing Method of Melting Point
5.4 Testing Method of Terminal Carboxyl Group
5.5 Testing Method of Chroma
5.6 Testing Method of Agglomerate Particle
5.7 Testing Method of Moisture
5.8 Testing Method of Powder Dust and Irregular Chip
5.9 Testing Method of Titanium Dioxide Content
5.10 Testing Method of Ash Content
5.11 Testing Method of Iron Content
5.12 Test Report
