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GB/T 14342-2015 English PDF

GB/T 14342-2015 (GB/T14342-2015, GBT 14342-2015, GBT14342-2015)
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GB/T 14342-2015English110 Add to Cart 0--9 seconds. Auto-delivery Man-made fiber -- Test method for specific resistance of staple fibers Valid GB/T 14342-2015
GB/T 14342-1993English199 Add to Cart 3 days [Need to translate] Testing method for specific resistance of synthetic staple fibres Obsolete GB/T 14342-1993
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BASIC DATA
Standard ID GB/T 14342-2015 (GB/T14342-2015)
Description (Translated English) Man-made fiber -- Test method for specific resistance of staple fibers
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard W50
Classification of International Standard 59.060.20
Word Count Estimation 8,894
Date of Issue 2015-09-11
Date of Implementation 2016-04-01
Older Standard (superseded by this standard) GB/T 14342-1993
Quoted Standard GB/T 3291.1; GB/T 3291.3; GB/T 4146.1; GB/T 4146.3; GB/T 8170; GB 9994
Drafting Organization Shanghai Textile Industry Technical Inspection Center
Administrative Organization China Textile Industry Association
Regulation (derived from) National Standard Announcement 2015 No.25
Proposing organization China Textile Industry Association
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This Standard specifies the test methods for chemical fiber staple specific resistance. This Standard applies to chemical fiber staple.


GB/T 14342-2015 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 59.060.20 W 50 Replacing GB/T 14342-1993 Man-Made Fiber – Test Method for Specific Resistance of Staple Fibers ISSUED ON. SEPTEMBER 11, 2015 IMPLEMENTED ON. APRIL 1, 2016 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of PRC. Table of Contents Foreword ... 3 1 Scope ... 5 2 Normative References ... 5 3 Terms and Definitions ... 5 4 Principles ... 6 5 Apparatus ... 6 6 Standard Atmosphere for Pre-humidifying, Humidifying and Test... 6 7 Specimen and Preparation ... 7 8 Test Procedures ... 8 9 Result Calculation ... 8 10 Test Report ... 9 Appendix A (Normative) Test Method of Specific Resistance – Bridge Method ... 10 Foreword This Standard was drafted as per the rules specified in GB/T 1.1-2009. This Standard replaced GB/T 14342-1993 Testing Method for Specific Resistance of Synthetic Staple Fibers. The major differences between this Standard and GB/T 14342-1993 are as follows. --- Modify the standard name; --- Modify the standard applicable scope (see Clause 1 of this Edition; Clause 1 of 1993 Edition); --- Modify the specific resistance terminology (see Sub-clause 3.1 of this Edition; Clause 3 of 1993 Edition); --- Modify the technical requirements of specific resistance meter of fiber (see Sub- clause 5.1 of this Edition; Sub-clause 5.1 of 1993 Edition); --- Modify the atmospheric requirements for humidifying and test (see Clause 6 of this Edition; Clause 6 of 1993 Edition); --- Modify the judging mode of humidifying balancing (see Sub-clause 6.2.3; Sub- clause 7.2 of 1993 Edition); --- Modify the clause contents on specimen and preparation (see Clause 7 of this Edition; Clause 7 of 1993 Edition); --- Modify the clause contents on test procedures (see Clause 8 of this Edition; Clause 8 of 1993 Edition); --- Add the formula to calculate the standard degree of filling for fiber (see Clause 9 of this Edition); --- Increase the clause on test report (see Clause 10 of this Edition); --- Increase one test method (see Appendix A). This Standard was proposed and under the jurisdiction of China National Textiles and Apparel Council. Drafting organizations of this Standard. Shanghai Textile Industry Institute of Technical Supervision, Yantai Yayho Advanced Materials Co., Ltd., Jiangsu Sanfangxiang Group Co., Ltd., Sinopec Yizheng Chemical Fiber Co., Ltd., and Sinopec Shanghai Petrochemical Co., Ltd. Man-Made Fiber – Test Method for Specific Resistance of Staple Fibers 1 Scope This Standard specifies the test methods for specific resistance of staple fibers of man- made fibers. This Standard is applicable to the staple fibers of man-made fibers. 2 Normative References The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document. GB/T 3291.1 Textiles - Terms of Textile Material Properties and Test - Part 1. Fiber and Yarn GB/T 3291.3 Textiles - Terms of Textile Material Properties and Test - Part 3. General GB/T 4146.1 Textiles – Man-Made Fibers – Part 1. Generic Names GB/T 4146.3 Textiles – Man-Made Fibers – Part 3. Terms of Inspection GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgement of Limiting Values GB 9994 The Convention Moisture Regains of Textiles 3 Terms and Definitions The following terms and definitions and those ones stipulated in GB/T 3291.1, GB/T 3291.3, GB/T 4146.1 and GB/T 4146.3 are applicable to this document. 3.1 Specific resistance Fibers, in certain volume, is converted into volume resistance according to the fiber 7.2 Take two pieces of 15g of fibers (accurate to 0.1g) from the sample through humidifying balance, which shall be regarded as the test sample. 8 Test Procedures 8.1 Start the specific resistance meter of fiber, pre-heating and adjusting to the normal working states. 8.2 Clean the internal test box with anhydrous ethanol, then cover the box. Connect the test electrodes of resistance meter to the two electrodes of test box; and exert 100V voltage; after measuring the insulation resistance no less than 1014Ω or no less than 10 times of the expected fiber resistance, it can be used for backup. 8.3 Disconnect the voltage on two electrodes of the test box; connect the two electrodes which shall also be grounding, so that the electrostatic is discharged on the electrode plates. 8.4 Use tweezers to fill the fiber evenly into the test box, cover it, so that the fiber is within 6cm×4cm×2cm space. 8.5 Connect the test electrodes of resistance meter to the two electrodes of the test box. 8.6 Exert the test voltage to the two electrodes of the test box; take the readings for resistance meter after energizing for 1min as the resistance value of the tested fiber. 8.7 Repeat the procedure of 8.3. 8.8 Take out the fiber from the test box, repeat the procedures 8.4~8.7 to measure the other fiber. NOTE. when the measuring range is 106Ω~1014Ω, the test voltage is 100V. In order to improve the readings accuracy of the instrument with pointer indication, 50V is optical; but it shall be indicated in the report. 8.9 The resistance value 102Ω~107Ω of staple fiber of man-made fibers can also be performed as per the provisions of Appendix A. 9 Result Calculation 9.1 The specific resistance of fiber shall be calculated as per Formula (1). Where. Appendix A (Normative) Test Method of Specific Resistance – Bridge Method A.1 Scope This Appendix specifies the test method of specific resistance – bridge method of staple fiber of man-made fibers. This Appendix is applicable to the staple fiber of man-made fibers with specific resistance of 102Ω~107Ω. A.2 Principle The two equivalent resistances form a branch circuit in series; the other branch circuit shall be formed by connecting the resistance box and test box in series. After the two branch circuits are connected in parallel, connect to the DC. Make the potential difference between the element series points of two branch circuits be zero through changing the value of resistance box. Then convert into the special resistance value according to the degree of filling for fiber. A.3 Apparatus A.3.1 DC power. 2V±0.06V; the output current is changing from zero to 10mA; the output voltage change is less than 1%. A.3.2 Resistance box. 102Ω~107Ω; step value 1Ω; accuracy 1%; power 0.25W. A.3.3 Resistance. 100kΩ; accuracy 1%; power 0.25W. A.3.4 Voltmeter. measuring range exceeds ±10mV, no greater than ±200mV; accuracy 1%. A.3.5 Pushbutton switch. A.3.6 Test box. a rectangular box with a lid for placing the fiber to be measured. The two sides on internal wall of box are two electrode plates; the electrode plates are 6cm- long and 4cm-wide, and the two plates are at interval of 2cm. The insulation resistance between the two electrodes is no less than 109Ω. The metal with outer housing grounding shall shield the test box. A.3.7 Balance. scale 0.01g. A.3.8 Tweezers, etc. ......