GB/T 20186.3-2023 Secondary coating materials used for optical fibre—Part 3:Modified polycarbonate

GB/T 1033.1-2008 Plastics—Methods for determining the density of non-cellular plastics—Part 1:Immersion method,liquid pyknometer method and titration method GB/T 1034-2008 Plastics—Determination of water absorption GB/T 1036-2008 Test method for coefficient of linear thermal expansion of plastics between-30 ℃ and 30 ℃ with a vitreous silica dilatometer GB/T 1040.2-2022 Plastics—Determination of tensile properties—Part 2:Test conditions for moulding and extrusion plastics GB/T 1634.2-2019 Plastics—Determination of temperature of deflection under load—Part 2:Plastics and ebonite GB/T 1843-2008 Plastics—Determination of izod impact strength GB/T 2411-2008 Plastics and ebonite—Determination of indentation hardness by means of a durometer(shore hardness) GB/T 3682.1-2018 Plastics—Determination of the melt mass-flow rate(MFR)and melt volume-flow rate(MVR)of thermoplastics—Part 1:Standard method GB/T 9341-2008 Plastics—Determination of flexural properties GB/T 17037.4-2003 Plastic—Injection moulding of test specimens of thermoplastic materials—Part 4:Determination of moulding shrinkage GB/T 20186.2-2021 Secondary coating materials used for optical fibre—Part 2: Modified propylene resin GB/T 1040.1-2006 Plastics—Determination of tensile properties—Part 1:General principles GB/T 1040.1-2018 Plastics—Determination of tensile properties—Part 1:General principles GB/T 1634.1-2004 Plastics—Determination of temperature of deflection under load—Part 1:General test method GB/T 1634.1-2019 Plastics—Determination of temperature of deflection under load—Part 1:General test method GB/T 2918-1998 Plastics—Standard atmospheres for conditioning and testing GB/T 2918-2018 Plastics—Standard atmospheres for conditioning and testing GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 17037.1-1997 Injection moulding of test specimens of thermoplastic materials—Part 1:General principles and moulding of multipurpose and bar test specimens GB/T 17037.1-2019 Plastics—Injection moulding of test specimens of thermoplastic materials—Part 1:General principles,and moulding of multipurpose and bar test specimens GB/T 26125-2011 Electrical and electronic products—Determination of six regulated substances(lead,mercury,cadmium,hexavalent chromium,polybrominated biphenyls,polybrominated diphenyl ethers) GB/T 31838.2-2019 Solid insulating materials—Dielectric and resistive properties—Part 2:Resistive properties(DC methods)—Volume resistance and volume resistivity GB/T 39560.8-2021 Determination of certain substances in electrical and electronic products—Part 8:Phthalates in polymers by gas chromatography-mass spectrometry (GC-MS),gas chromatography-mass spectrometry using a pyrolyzer/thermaldesorption accessory (Py/TD-GC-MS) GB/T 1634.1-2025 Plastics—Determination of temperature of deflection under load—Part 1:General test method GB/T 1040.1-2025 Plastics—Determination of tensile properties—Part 1:General principles