GB/T 39937-2021 English PDFUS$264.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 39937-2021: Plastics - Extruded sheets of polypropylene (PP) - Requirements and test methods Status: Valid
Basic dataStandard ID: GB/T 39937-2021 (GB/T39937-2021)Description (Translated English): Plastics - Extruded sheets of polypropylene (PP) - Requirements and test methods Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G33 Word Count Estimation: 14,152 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 39937-2021: Plastics - Extruded sheets of polypropylene (PP) - Requirements and test methods---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Plastics - Extruded sheets of polypropylene (PP) - Requirements and test methods ICS 83.140.10 G33 National Standards of People's Republic of China Plastic products polypropylene (PP) extruded sheet Requirements and test methods (ISO 15013.2007, IDT) Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. The translation method used in this standard is equivalent to ISO 15013.2007 Requirements and Test Methods for Polypropylene (PP) Extruded Sheets for Plastic Products law". The Chinese documents that have a consistent correspondence relationship with the normatively cited international documents in this standard are as follows. ---GB/T 1040.2-2006 Determination of tensile properties of plastics Part 2.Test conditions for molding and extrusion plastics (ISO 527-2.1993, IDT); ---GB/T 1043.1-2008 Determination of impact properties of plastic simply supported beams Part 1.Non-instrumented impact test (ISO 179-1.2000, IDT); ---GB/T 1043.2-2018 Determination of impact properties of plastic simply supported beams Part 2.Instrumental impact test (ISO 179- 2.1997, IDT); ---GB/T 2546.1-2006 Plastic polypropylene (PP) molding and extrusion materials Part 1.Naming system and classification basis (ISO 1873-1.1995,MOD); ---GB/T 2918-2018 Standard environment for condition adjustment and testing of plastic specimens (ISO 291.2008, MOD); ---GB/T 3682.1-2018 Plastic Thermoplastic Melt Mass Flow Rate (MFR) and Melt Volume Flow Rate (MVR) Determination Part 1.Standard Method (ISO 1133-1.2011, MOD); ---GB/T 3682.2-2018 Plastic Thermoplastic Melt Mass Flow Rate (MFR) and Melt Volume Flow Rate (MVR) Determination Part 2.Test methods for materials sensitive to time-temperature history and/or humidity (ISO 1133-2. 2011, MOD); ---GB/T 12027-2004 Plastic film and sheet heating dimensional change rate test method (ISO 11501.1995, IDT). This standard has made the following editorial changes. ---The introduction of Table A.1 in Appendix A has been added; the length and width in Table A.1 are listed in separate columns (see Appendix A). Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents. This standard was proposed by the China National Light Industry Council. This standard is under the jurisdiction of the National Plastics Standardization Technical Committee (SAC/TC48). Drafting organizations of this standard. Suzhou Aichibot Testing Technology Co., Ltd., Baoding Lida Plastic Industry Co., Ltd., Kunshan Akasi Testing Division Technology Service Co., Ltd., Suzhou Runjia Engineering Plastics Co., Ltd., Kunshan Achilles New Material Technology Co., Ltd., Beijing Technology and Business University, Dongguan Weiside Technology Development Co., Ltd., Kunshan Xiefu New Materials Co., Ltd., Foshan Chancheng Quality Technology Association. The main drafters of this standard. Ding Runkang, Li Yanying, Zhao Jianming, Jiang Pu, Xu Bo, Weng Yonghua, Wang Liwen, Zhang Wenfu, Ding Jufang, Fu Weixia. Plastic products polypropylene (PP) extruded sheet Requirements and test methods1 ScopeThis standard specifies the extrusion of polypropylene homopolymer (PP-H) and polypropylene copolymer (PP-B and PP-R) without fillers and reinforcing materials. Performance requirements and test methods of plastic plates. This standard applies to PP sheets with a thickness of 0.5mm~40mm, as well as sheets in the form of coils.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. ISO 179-1 Determination of impact properties of plastic simply supported beams Part 1.Non-instrumented impact test (Plastics- DeterminationofCharpyimpactproperties-Part 1.Non-instrumentedimpacttest) ISO 179-2 Determination of impact properties of plastic simply supported beams Part 2.Instrumented impact test (Plastics-Determination ofCharpyimpactproperties-Part 2.Instrumentedimpacttest) ISO 291 Standard environment for condition adjustment and testing of plastic specimens (Plastics-Standardatmospheresfor conditioningandtesting) ISO 527-2 Determination of tensile properties of plastics Part 2.Test conditions for molding and extrusion plastics (Plastics-Determi- nationoftensileproperties-Part 2.Testconditionsformouldingandextrusionplastics) ISO 1133 Plastics Thermoplastic Melt Mass Flow Rate (MFR) and Melt Volume Flow Rate (MVR) Determination (Plastics-Determinationofthemeltmass-flowrate(MFR)andmeltvolume-flowrate(MVR)of thermoplastics) ISO 1873-1 Plastic Polypropylene (PP) Moulding and Extrusion Materials Part 1.Identification System and Specification Basis (Plastics- Polypropylene(PP) mouldingandextrusionmaterials-Part 1.Designationsystemandbasisforspeci- fications) ISO 2818 Plastics-Preparation of test specifications by machining ISO 4577 Plastics polypropylene and propylene copolymers-Determination of thermal oxidative stability in air-Oven method (Plastics-Poly- propyleneandpropylene-copolymers-Determinationofthermaloxidativestabilityinair-Ovenmeth- od) ISO 11501 Plastic film and sheet heating dimensional change rate test method (Plastics-Filmandsheeting-Deter- minationofdimensionalchangeonheating)3 materialThe sheet shall consist of an extruded PP mixture without filling or reinforcing materials as defined in ISO 1873-1.The extrusion mixture may contain There are additives such as processing aids, stabilizers, flame retardants, impact modifiers and colorants. Plates should not use compounds of unknown composition or additives Add agent. Note. Select materials according to the requirements of relevant laws, regulations and national standards (see 4.3.3). 4.3.2.2 Maximum shrinkage for thermoforming applications For sheets for thermoforming applications, under the conditions specified in Table 3, measure the maximum shrinkage in the extrusion direction according to 5.10, and the result should not exceed the table The value given in 3. Table 3 Maximum shrinkage for thermoforming applications 4.3.3 Hygienic performance According to the requirements of relevant laws, regulations and national standards.5 Test method5.1 Sample 5.1.1 Sample preparation The sample should be cut separately from the longitudinal direction (extrusion direction, the same below) and the transverse direction (perpendicular to the extrusion direction, the same below), and the cutting should be evenly distributed on the plate. Take a sample. For plates in the form of coils, 2m should be taken from the end of the coil to prepare samples. There should be no damage on the surface of the specimen that can cause the notch effect. Injuries and defects. During the preparation process, if there are burrs or flashes on the sample, they should be removed without damaging the surface of the sample. When needed, Use sandpaper with a particle size of 220 or finer to smooth the length of the test sample. Samples with a thickness of more than 4.2mm are undergoing 5.5~ During the test in 5.7, one-sided processing shall be carried out in accordance with the requirements of ISO 2818 to make the thickness reach 4.0mm±0.2mm. 5.1.2 State adjustment All samples should be placed at the standard temperature of 23°C specified in ISO 291 for at least 16h. If there is no significant difference in the test results, you can provide Both parties need to negotiate to determine the use of a shorter state adjustment time. 5.1.3 Test Unless otherwise specified, the test should be carried out at the 23°C standard temperature specified in ISO 291. 5.2 Delivery conditions Check visually to ensure that there is no mechanical damage or other obvious defects. If necessary, it can be inspected by ultrasonic or X-ray methods. 5.3 Appearance Whenever possible, a suitable light source should be used to inspect visible defects through transmitted light. Otherwise, the reflected light with sufficient brightness should be used. According to the supply The requirements (which can be a written specification or a reference sample) and the corresponding category to identify all deficiencies that need to be negotiated by both parties. 5.4 Dimensions 5.4.1 Thickness The calibrated equipment that meets the requirements of Table 4 shall be used to measure the thickness h. 5.4.2 Length and width Appropriate calibrated equipment or meters should be used for measurement, accurate to 1mm. Measure the surface along the cutting edge. 5.4.3 Right angle For a flat sheet, use the difference between the diagonal lengths to represent the right angle |d1-d2|, as shown in Figure 1.Should use a scale or The tape measure is accurate to 1mm. 5.4.4 Curvature of coil Lay the coil flat and measure its curvature along a straight edge. Use appropriate calibrated equipment or meters to measure with an accuracy of 1mm. 5.5 Tensile yield stress and tensile yield strain According to the test specified in ISO 527-2, at least 5 type 1B specimens are cut from the longitudinal and transverse directions to determine the tensile yield stress σy and Tensile yield strain εy, test speed is 50mm/min±5mm/min. 5.6 Tensile modulus of elasticity According to the test specified in ISO 527-2, at least 5 type 1B specimens are cut from the longitudinal and transverse directions to determine the tensile elastic modulus Et. The inspection speed is 1.0mm/min±0.2mm/min. 5.7 Notched impact strength of simply supported beams For plates with thickness hn ≥ 4mm, the notched impact strength acn of the sample should be in accordance with ISO 179-1/1eA or ISO 179-2/ 1eA is measured, and at least 10 samples are cut from the vertical and horizontal directions. 5.8 Melt mass flow rate (MFR) Measured according to ISO 1133, the temperature is 230℃, and the load is 2.16kg. 5.9 Heat resistance Measured in accordance with ISO 4577. 5.10 Determination of thermal behavior Measured in accordance with ISO 11501.Cut at least three samples, the size is 100mm×100mm, in the center and two sides of the plate respectively Sampling should be taken at least 50mm away from the edge of the plate. Make one or more pairs of marks in the extrusion direction of the sample. Measure the mark at room temperature The initial length, L0, is accurate to 0.1mm. Sprinkle a layer of kaolin on the sample and lay it flat on the kaolin bed in a circulating air oven. test The temperature and duration of the test are shown in Table 5 and Table 6. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 39937-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 39937-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 39937-2021_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 39937-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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