1 Scope
This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of poly (ethylene terephthalate) (PET) resin for bottles.
This standard is applicable to homopolymerized PET resin which is produced with direct-esterification-continuous-polycondensation or discontinuous-polycondensation method with pure terephthalic acid and ethanediol as major raw materials and copolymerized PET resin which is produced with direct-esterification-continuous-polycondensation or discontinuous-polycondensation method with pure terephthalic acid, ethanediol and isophthalic acid as major raw materials.
2 Normative References
The following documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments (excluding amending errors) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest editions referred to apply.
GB/T 601-2002 Chemical Reagent - Preparations of Standard Volumetric Solutions
GB/T 1033-1986 Test Method for Density and Relative Density of Plastics
GB/T 6678-1986 General Principles for Sampling Chemical Products
GB/T 6679-1986 General Rules for Sampling of Solid Chemical Products
GB/T 8170-1987 Rules for Rounding off of Numerical Values
GB/T 9345-1988 Plastics - Determination of Ash - General Methods (idt ISO 3451/1:1981)
GB 13114 Hygienic Standard for Polyethylene Terephthalate Resin Used as Food Containers and Packaging Materials
GB/T 14190-1993 Analysis Methods for Fiber Grade Polyester Chip
ISO 1628-1:1998 Plastics - Determination of the Viscosity of Polymers in Dilute Solution Using Capillary Viscometers - Part 1: General Principles1?
ISO 11357-1:1999(E) Plastics - Differential Scanning Calorimetry (DSC) - Part 1: General Principles1)
ISO 11357-3:1999(E) Plastics - Differential Scanning Calorimetry (DSC) - Part 3: Determination of Temperature and Enthalpy of Melting and Crystallization1)
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Product Classification
5 Requirements
6 Test Method
7 Inspection Rule
8 Marking, Packaging, Transportation and Storage
Appendix A (Normative) Determination for the Viscosity of PET Resin in Dilute Solution - Capillary Viscosimeter Method
Appendix B (Normative) Determination of Acetaldehyde Content in PET Resin for Bottles - Headspace Gas Chromatography Method
Appendix C (Normative) Preparation of Density Gradient Column - Batch Process
Bibliography
