GB/T 29284-2024 Poly(lactic acid)

GB/T 29284-2012 Poly (lactic acid)

GB/T 14190-2017 Testing methods of fiber grade polyester (PET) chip 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 1040.2-2006 Plastics—Determination of tensile properties—Part 2:Test conditions for moulding and extrusion plastics GB/T 1040.2-2022 Plastics—Determination of tensile properties—Part 2:Test conditions for moulding and extrusion plastics GB/T 1043.1-2008 Plastics—Determination of charpy impact properties—Part 1:Non-instrumented impact test GB/T 2547-1981 Plastic resins—Sampling GB/T 2547-2008 Plastic resins—Sampling GB/T 2918-1998 Plastics—Standard atmospheres for conditioning and testing GB/T 2918-2018 Plastics—Standard atmospheres for conditioning and testing 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 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 9345.1-2008 Plastics—Determination of ash—Part 1:General methods 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 19277.1-2011 Determination of the ultimate aerobic biodegradability of plastic materials under conctrolled composting conditions—Method by analysis of evolved cabon dioxide—Part 1:General method GB/T 19466.2-2004 Plastics—Differential scanning calorimetry(DSC)—Part 2:Determination of glass transition temperature GB/T 19466.3-2004 Plastics—Differential scanning calorimetry(DSC)—Part 3:Determination of temperature and enthalpy of melting and crystallization GB/T 37191-2018 Raw rubber—Determination of water content—Karl Fischer method GB/T 19277.1-2025 Determination of the ultimate aerobic biodegradability of plastic materials under conctrolled composting conditions—Method by analysis of evolved cabon dioxide—Part 1:General method GB/T 19466.2-2025 Plastics—Differential scanning calorimetry(DSC) method—Part 2:Determination of glass transition temperature and step height GB/T 19466.3-2025 Plastics—Differential scanning calorimetry(DSC) method—Part 3:Determination of temperature and enthalpy of melting and crystallization