GB/T 20186.1-2006 English PDF (GBT20186.1-2006)

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GB/T 20186.1-2006: Secondary coating materials used for optical fiber -- Part 1: Polybutylene terephthalate
GB/T 20186.1-2006
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 33.180.10
M 33
Secondary Coating Materials Used for Optical Fiber –
Part 1: Polybutylene Terephthalate
ISSUED ON: APRIL 05, 2006
IMPLEMENTED ON: OCTOBER 01, 2006
Issued by: General Administration of Quality Supervision, Inspection
and Quarantine
Standardization Administration of PRC.
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative References ... 5
3 Requirements ... 6
4 Test Methods ... 7
5 Inspection Rules ... 10
6 Mark, Package, Transportation and Storage ... 12
Appendix A (Normative) Preparation of Standard Specimen for Secondary
Coating Materials ... 13
Appendix B (Normative) Test Methods of Moisture Content for Secondary
Coating Materials ... 15
Appendix C (Normative) Thermal Hydrolysis Property for Secondary Coating
Materials – Strength Test Methods ... 16
Appendix D (Normative) Compatibility of Secondary Coating Materials and the
Filling Ointment ... 18
Appendix E (Informative) Technical Requirements and Test Methods of PBT
Loose Tube ... 20
Appendix F (Informative) Preparation of Tubular Specimen for Loose Tube . 23
Appendix G (Informative) Sampling Method for the Tubular Specimen of
Loose Tube ... 25
Appendix H (Informative) Test Method for Mechanical Properties of Loose
Tube ... 26
Appendix J (Informative) Test Method for Axis Backward Shrinkage of Loose
Tube ... 28
Appendix K (Informative) Test Method for Thermal Hydrolysis of Loose Tube
... 29
Appendix L (Informative) Test Method for Thermal Aging Resistance of Loose
Tube ... 30
Appendix M (Informative) Test Method for Side Pressure Resistance of Loose
Tube ... 31
Appendix N (Informative) Test Method for Bending Resistance of Loose Tube
... 33
Appendix O (Informative) Compatibility between Filling Compound and Loose
Tube – Test Method for Winding Resistance ... 35
Foreword
GB/T 20186 Secondary Coating Materials Used for Optical Fiber includes the following
parts:
--- Part 1: Polybutylene Terephthalate;
--- Part 2: Modified Propylene Resin.
This Part is Part 1 of GB/T 20186. This Part was formulated by reference of the
following standards, such as American Society for Testing Materials Standard ASTM D
4507 Specification for Thermoplastic Polyester, IEC 60794-1-2:1999 Optical Fiber
Cables – Part 1-2: Generic Specification – Basic Optical Cable Test Procedures,
American Bellcore Communication Research Institute Standard: Specification for
Optical Fiber Loose Tube GR-20-CORE 6.3.4 Cable Material Compatibility (1998), ISO
relevant material standards, advanced standards of the international similar products,
and YD/T 769-2003 Central Beam Tube Type Fully Filled Outdoor Single-Mode Optical
Cable for Communication, etc.
This Part’s Appendixes A, B, C, D are normative.
This Part’s Appendixes E, F, G, H, J, K, L, M, N, O are informative.
This Part was proposed by Ministry of Information Industry of PRC.
This Part shall be under the jurisdiction of Ministry of Information Industry
(Communication).
Drafting organization of this Part: Wuhan Research Institute of Posts and
Telecommunications.
Chief drafting staffs of this Part: Hu Zhanhong, and Wei Zhongcheng.
Secondary Coating Materials Used for Optical Fiber –
Part 1: Polybutylene Terephthalate
1 Scope
This Part specifies the technical requirements, test methods, inspection rules, mark,
package, transportation and storage of polybutylene terephthalate of secondary
coating materials used for optical fiber.
This Part is applicable to the manufacture, use and acceptance of secondary coating
materials PBT used for optical fiber loose tube.
2 Normative References
The provisions in following documents become the provisions of this Part through
reference in this Part of GB/T 20186. For dated references, the subsequent
amendments (excluding corrigendum) or revisions do not apply to this Part, however,
parties who reach an agreement based on this Part are encouraged to study if the
latest versions of these documents are applicable. For undated references, the latest
edition of the referenced document applies.
GB/T 1033-1986 Test Method for Density and Relative Density of Plastics
GB/T 1034-1998 Plastics – Determination of Water Absorption (eqv ISO 62:1980)
GB/T 1036-1989 Determination for Coefficient of Linear Expansion of Plastics
GB/T 1040-1992 Plastics – Determination of Tensile Properties
GB/T 1410-1989 Methods of Test for Volume Resistivity and Surface Resistivity of
Solid Insulating Materials (eqv IEC 60093:1980)
GB/T 1634.1-2004 Plastics - Determination of Temperature of Deflection under
Load - Part 1: General Test Method
GB/T 1634.2-2004 Plastics - Determination of Temperature of Deflection under
Load - Part 2: Plastics, Ebonite and Long-Fiber-Reinforced Composites
GB/T 1843-1996 Plastics – Determination of Izod Impact Strength (eqv ISO 180-
1993)
GB/T 2828.1-2003 Sampling Procedures for Inspection by Attribute - Part1:
Sampling Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-Lot
Inspection (ISO 2859-1:1999, IDT)
GB/T 2829-2002 Sampling Procedures and Tables for Periodic Inspection by
Attributes (Apply to Inspection of Process Stability)
GB/T 2918-1998 Plastics – Standard Atmospheres for Conditioning and Testing
(idt ISO 291-1997)
GB/T 2951.1-1997 Common Test Methods for Insulating and Sheathing Materials
of Electric Cables - Part 1: Methods for General Application - Section One:
Measurement of Thickness and Overall Dimensions - Tests for Determining the
Mechanical Properties (idt IEC 60811-1-1:1993)
GB/T 2951.37-1994 Test Method for Determining Mechanical and Physical
Properties of Electric Cables and Wires - Test for Oxidative Inductive Time
GB/T 2411-1980 Plastics – Shore Hardness Test (eqv ISO 868:1978)
GB/T 3682-2000 Determination of the Melt Mass-Flow Rate (MFR) and the Melt
Volume-Flow Rate (MVR) of Thermoplastics (idt ISO 1133: 1997)
GB/T 9341-2000 Plastics – Determination of Flexural Properties (idt ISO 178:1993)
GB/T 17037.1-1997 Injection Molding of Test Specimens of Thermoplastic
Materials - Part 1: General Principles and Molding of Multipurpose and Bar Test
Specimens (idt ISO 294-1:1996)
ISO 1628-5:1986 (E) Plastics – Determination of the Viscosity of Polymers in
Dilute Solution Using Capillary Viscometers – Part 5: Thermoplastic polyester (TP)
Homopolymers and Copolymers
3 Requirements
3.1 Appearance
The product is the milky white, milky yellow or colorless transparent cylindrical particles
with diameter of 2mm~4mm, length of 2mm~4mm. The particles shall be smooth, free
of impurities and free of beads.
3.2 Physical and mechanical properties and electrical properties
The physical and mechanical properties and electrical properties of PBT materials shall
meet the requirements of Table 1.
Table 1 – Physical and Mechanical Properties and Electrical Properties of PBT
Materials
Table 1 – Continued
4 Test Methods
4.1 Appearance
Visually examination under natural light.
SN Names of items Units Indicators
Density
Melt index
Moisture content
Coefficient of water saturation
Yield strength
Yield elongation
Elongation at break
Tensile modulus of elasticity
Bending modulus of elasticity
Bending strength
Melting point
Shore hardness HD
Izod impact strength
Linear expansion factor (23°C~80°C)
Volume resistivity
Deflection te...