GB/T 20186.2-2021Secondary coating materials used for optical fibre—Part 2: Modified propylene resin (English PDF)

Foreword

GB/T 20186 "Secondary Coating Materials for Optical Fiber" has released the following parts.

---Part 1: Polybutylene terephthalate;

---Part 2: Modified polypropylene. This part is Part 2 of GB/T 20186.

This part was drafted in accordance with the rules given in GB/T 1.1-2009.

This part replaces GB/T 20186.2-2008 "Secondary Coating Materials for Optical Fiber Part 2: Modified Polypropylene", and Compared with GB/T 20186.2-2008, the main technical changes except for editorial changes are as follows.

--- Deleted the size requirements of the product diameter (see 3.1 in the 2008 edition);

---Modified the index requirements for melt index, bending strength, impact strength of cantilever beam, load deformation temperature, and inspection of linear expansion coefficient Scope of testing requirements (see Table 1, Table 1 of the 2008 edition);

---Increase the index requirements and test methods for oxidation induction time at.200°C (see Table 1, 4.11);

--- Added environmental performance requirements and test methods (see 3.3, 4.18);

---The requirements for standard samples have been added (see Table 3);

---Modified the test method of water content (see 4.6, 2008 edition 4.6);

---Added requirements for sample preparation in bending performance test and load deformation temperature test (see 4.9, 4.16);

---Modified the melting point test method (see 4.10, 2008 edition 4.10);

---Modified the requirements of sample preparation in the cantilever beam impact test (see Table 3, 4.13, 2008 edition 4.12);

---Modified the inspection rules (see Chapter 5);

--- Modified marking, packaging, transportation and storage (see Chapter 6, Chapter 6 of the 2008 edition);

--- Deleted the technical requirements and test methods of MPP loose casing (see Appendix A of the 2008 edition);

---Added Appendix A (Test Method for Water Content of Secondary Coating Materials) (see Appendix A);

---Appendix B (test method for compatibility of secondary coating material and filling compound) has been added (see Appendix B).

1 Scope

This part of GB/T 20186 specifies the technical requirements and tests for the secondary coating material modified polypropylene (hereinafter referred to as MPP) for optical fiber Methods, inspection rules, marking, packaging, transportation and storage.

This section applies to modified polypropylene with secondary coating materials for optical fibers.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 1033.1-2008 Determination of the density of plastic non-foam plastics Part 1: Immersion method, liquid pycnometer method and titration method

GB/T 1034-2008 Determination of Water Absorption of Plastics

GB/T 1036-2008 Determination of the coefficient of linear expansion of plastics at -30°C~30°C Quartz dilatometer method

GB/T 1040.1-2018 Determination of tensile properties of plastics Part 1: General

GB/T 1634.2-2019 Determination of Deflection Temperature of Plastics under Load Part 2: Plastics and Ebonite

GB/T 1843-2008 Determination of impact strength of plastic cantilever beam

GB/T 2411-2008 Plastic and hard rubber use a durometer to determine the indentation hardness (Shore hardness)

GB/T 2546.2-2003 Plastic Polypropylene (PP) Moulding and Extrusion Materials Part 2: Sample Preparation and Performance Determination

GB/T 2828.1-2012 Sampling inspection procedures by attributes Part 1: Batch inspection sampling searched by acceptance quality limit (AQL) plan

GB/T 2829-2002 Periodic Inspection Attribute Sampling Procedure and Table (Applicable to the inspection of process stability)

GB/T 2918-2018 Standard environment for condition adjustment and testing of plastic specimens

GB/T 3682.1-2018 Plastic Thermoplastic Melt Mass Flow Rate (MFR) and Melt Volume Flow Rate (MVR) Determination of Part 1: Standard Method

GB/T 8170-2008 Numerical rounding rules and the expression and determination of limit values

GB/T 9341-2008 Determination of bending properties of plastics

GB/T 17037.1-2019 Preparation of injection molded specimens of plastic thermoplastic materials Part 1: General principles and multi-purpose tests Sample and preparation of long strip samples

GB/T 19466.6-2009 Plastic Differential Scanning Calorimetry (DSC) Part 6: Oxidation induction time (isothermal OIT) and oxygen Determination of chemical induction temperature (dynamic OIT)

GB/T 26125-2011 Six restricted substances in electrical and electronic products (lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers) Determination of

GB/T 28724-2012 Determination of the melting point of solid organic chemicals Differential scanning calorimetry

GB/T 31838.2-2019 Dielectric and resistance characteristics of solid insulating materials Part 2: Resistance characteristics (DC method) Volume Electrical resistance and volume resistivity

IEC 62321-8:2017 Determination of specific substances in electrical and electronic products Part 8: Gas chromatography-mass spectrometry (GC- MS), gas chromatography-mass spectrometer (Py/T D-GC-MS) equipped with thermal pyrolysis/thermal desorption accessories for the determination of phthalates in polymers