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GB/T 9341-2008   Plastics - Determination of flexural properties (English Version)
Standard No.: GB/T 9341-2008 Status:valid remind me the status change

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Standard No.: GB/T 9341-2008
English Name: Plastics - Determination of flexural properties
Chinese Name: 塑料 弯曲性能的测定
Chinese Classification: G31    Basic standards and general methods for synthetic resin and plastic
Professional Classification: GB    National Standard
ICS Classification: 83.080.01 83.080.01    Plastics in general 83.080.01
Issued by: AQSIQ; SAC
Issued on: 2008-08-04
Implemented on: 2009-4-1
Status: valid
Superseding:GB/T 9341-2000 Plastics--Determination of flexural properties
Language: English
File Format: PDF
Word Count: 8500 words
Price(USD): 120.0
Delivery: via email in 1 business day
1 Scope 1.1 This standard specifies a method for determining the flexural properties of rigid and semi-rigid plastics under defined conditions. A standard test specimen is defined, but parameters are included for alternative specimen sizes for use where appropriate. A range of test speeds is included. 1.2 The method is used to investigate the flexural behaviour [1] of the test specimens and for determining the flexural strength, flexural modulus and other aspects of the flexural stress/strain relationship under the conditions defined. It applies to a freely supported beam, loaded at mid-span (three-point loading test). 1.3 The method is suitable for use with the following range of materials: --thermoplastics moulding and extrusion materials, including filled and reinforced compounds in addition to unfilled types; rigid thermoplastics sheets; --thermosetting moulding materials, including filled and reinforced compounds; thermosetting sheets. In agreement with GB/T 19467.1-2004[2] and GB/T 19467.2-2004[3], this standard applies to fibre-reinforced compounds with fibre lengths≤7.5 mm prior to processing. For long-fibre-reinforced materials (laminates) with fibre lengths >7.5 mm, see reference [4]. The method is not normally suitable for use with rigid cellular materials and sandwich structures containing cellular material[5,6]. NOTE For certain types of textile-fibre-reinforced plastics, a four-point bending test is preferred. It is described in reference [4]. 1.4 The method is peormed using specimens which may be moulded to the specified dimensions, machined from the central portion of a standard multipurpose test specimen (see GB/T 11997-2008) or machined from finished or semi-finished products such as mouldings, or extruded or cast sheet. 1.5 The method specifies preferred dimensions for the test specimen. Tests which are carried out on specimens of different dimensions, or on specimens which are prepared under different conditions, may produce results which are not comparable. Other factors, such as the test speed and the conditioning of the specimens, can also influence the results. Especially for semi-crystalline polymers, the thickness of the oriented skin layer, which is dependent on moulding conditions and thickness, affects the flexural propeies. Consequently, when comparable data are required, these factors must be carefully controlled and recorded.
Foreword I ISO Foreword II 1 Scope 2 Normative References 3 Terms and definitions 4 Principle 5 Test Machine 6 Test Specimens 7 Conditioning 8 Procedure 9 Calculation and Expression of Results 10 Precision 11 Test Report Annex A (Normative) Compliance Correction Annex B (Informative) Precision Statement Bibliography
Referred in GB/T 9341-2008:
*GB/T 2918-1998 Plastics--Standard atmospheres for conditioning and testing
*GB/T 5471-2008 Plastics - Compression moulding of test specimens of thermosetting materials
*GB/T 9352-2008 Plastic - Compression moulding of test specimens of thermoplastic materials
*GB/T 11997-2008 Plastic - Multipurpose test specimens
*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 17200-1997 Requirements for tensile,flexural and compression testing machines for rubbers and plastics
GB/T 9341-2008 is referred in:
* JG 161-2004 Unbonded prestressing steel strand
* GB 3836.1-2010 Explosive atmospheres—Part 1:Equipment—General requirements
* GB 3836.1-2010 Explosive atmospheres—Part 1:Equipment—General requirements
* JG 161-2004 Unbonded prestressing steel strand
* GB/T 5019.2-2009 Specification for insulating materials based on mica—Part 2:Methods of test
* GB/T 28711-2012 No power type of amusement devices - Swing
* GB/T 27689-2011 No power type of amusement devices - Children slide
* GB 7251.1-2013 Low-voltage switchgear and controlgear assemblies-Part 1:General rules
*TB/T 2403-2010 Brake shoes for fright rolling stock of railways
*NB/T 42077-2016 In-cable Control and Protective Device for Mode 2 Charging of Electric Road Vehicles (IC-CPD)
*GB/T 24970-2010 Delineator
*GB/T 18442.3-2019 Static vacuum insulated cryogenic pressure vessels—Part 3:Design
*CJ/T 297-2016 High Density Polyethylene Sheathing Compounds for Bridge Cable
*GB/T 4085-2015 Semirigid polyvinyl chloride floor tiles
*QB/T 2463.2-2018 Unplasticized polyvinyl chloride foam boards. Part 2: celuka extrusion process
*NB/T 10187-2019 Technical requirement and test method of the floating body of floating PV system
*GB/T 38288-2019 Plastics—Recycled polypropylene compound
*GB/T 29645-2013 Plastics—Recycled polystyrene compound
*GB/T 3836.1-2021 Explosive atmospheres—Part 1:Equipment—General requirements
*GB/T 3836.3-2021 Explosive atmospheres—Part 3:Equipment protection by increased safety“e”
*GB/T 40006.7-2021 Plastics—Recycled plastics—Part 7: Polycarbonate(PC) materials
*GB/T 7251.1-2013 Low-voltage switchgear and controlgear assemblies―Part 1:General rules
*GB/T 37698-2019 Additive manufacturing-Design-Requirements,guidelines and recommendations
*GB/T 8814-2017 Unplasticized polyvinyl chloride(PVC-Uprofiles for the doors and windows
*CJ/T 258-2014 Fiber reinforced polypropylene random copolymer composite pipe
*GB/T 12672-2009 Acrylonitrile-butadiene-styrene(ABS)resin
*TB/T 3104.1-2020/XG1-2024 Brake shoes for rolling stock. Part 1:Composite brake shoes,includes Amendment 1
Code of China
Standard
GB/T 9341-2008  Plastics - Determination of flexural properties (English Version)
Standard No.GB/T 9341-2008
Statusvalid
LanguageEnglish
File FormatPDF
Word Count8500 words
Price(USD)120.0
Implemented on2009-4-1
Deliveryvia email in 1 business day
Detail of GB/T 9341-2008
Standard No.
GB/T 9341-2008
English Name
Plastics - Determination of flexural properties
Chinese Name
塑料 弯曲性能的测定
Chinese Classification
G31
Professional Classification
GB
ICS Classification
Issued by
AQSIQ; SAC
Issued on
2008-08-04
Implemented on
2009-4-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
GB/T 9341-2000 Plastics--Determination of flexural properties
Language
English
File Format
PDF
Word Count
8500 words
Price(USD)
120.0
Keywords
GB/T 9341-2008, GB 9341-2008, GBT 9341-2008, GB/T9341-2008, GB/T 9341, GB/T9341, GB9341-2008, GB 9341, GB9341, GBT9341-2008, GBT 9341, GBT9341
Introduction of GB/T 9341-2008
1 Scope 1.1 This standard specifies a method for determining the flexural properties of rigid and semi-rigid plastics under defined conditions. A standard test specimen is defined, but parameters are included for alternative specimen sizes for use where appropriate. A range of test speeds is included. 1.2 The method is used to investigate the flexural behaviour [1] of the test specimens and for determining the flexural strength, flexural modulus and other aspects of the flexural stress/strain relationship under the conditions defined. It applies to a freely supported beam, loaded at mid-span (three-point loading test). 1.3 The method is suitable for use with the following range of materials: --thermoplastics moulding and extrusion materials, including filled and reinforced compounds in addition to unfilled types; rigid thermoplastics sheets; --thermosetting moulding materials, including filled and reinforced compounds; thermosetting sheets. In agreement with GB/T 19467.1-2004[2] and GB/T 19467.2-2004[3], this standard applies to fibre-reinforced compounds with fibre lengths≤7.5 mm prior to processing. For long-fibre-reinforced materials (laminates) with fibre lengths >7.5 mm, see reference [4]. The method is not normally suitable for use with rigid cellular materials and sandwich structures containing cellular material[5,6]. NOTE For certain types of textile-fibre-reinforced plastics, a four-point bending test is preferred. It is described in reference [4]. 1.4 The method is peormed using specimens which may be moulded to the specified dimensions, machined from the central portion of a standard multipurpose test specimen (see GB/T 11997-2008) or machined from finished or semi-finished products such as mouldings, or extruded or cast sheet. 1.5 The method specifies preferred dimensions for the test specimen. Tests which are carried out on specimens of different dimensions, or on specimens which are prepared under different conditions, may produce results which are not comparable. Other factors, such as the test speed and the conditioning of the specimens, can also influence the results. Especially for semi-crystalline polymers, the thickness of the oriented skin layer, which is dependent on moulding conditions and thickness, affects the flexural propeies. Consequently, when comparable data are required, these factors must be carefully controlled and recorded.
Contents of GB/T 9341-2008
Foreword I ISO Foreword II 1 Scope 2 Normative References 3 Terms and definitions 4 Principle 5 Test Machine 6 Test Specimens 7 Conditioning 8 Procedure 9 Calculation and Expression of Results 10 Precision 11 Test Report Annex A (Normative) Compliance Correction Annex B (Informative) Precision Statement Bibliography
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