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GB/T 457-2008 English PDF

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GB/T 457-2008: Paper and board -- Determination of folding endurance
Status: Valid

GB/T 457: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 457-2008English229 Add to Cart 3 days [Need to translate] Paper and board -- Determination of folding endurance Valid GB/T 457-2008
GB/T 457-2002English359 Add to Cart 3 days [Need to translate] Paper determination of folding endurance (Schopper method) Obsolete GB/T 457-2002
GB/T 457-1989English199 Add to Cart 2 days [Need to translate] Paper--Determination of folding endurance Obsolete GB/T 457-1989

PDF similar to GB/T 457-2008


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Basic data

Standard ID GB/T 457-2008 (GB/T457-2008)
Description (Translated English) Paper and board -- Determination of folding endurance
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard Y30
Classification of International Standard 85-010
Word Count Estimation 10,10
Date of Issue 2008-08-19
Date of Implementation 2009-05-01
Older Standard (superseded by this standard) GB/T 1538-1979; GB/T 2679.5-1995; GB/T 457-2002
Quoted Standard GB/T 450; GB/T 10739
Adopted Standard ISO 5626-1993, MOD
Regulation (derived from) National Standard Approval Announcement 2008 No.14 (Total No.127)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the determination of the degree of folding paper and paperboard Schopper method and MIT method. Proposed the use of the instrument should comply with the conditions and matters should be noted that the use of each instrument. Schopper method is suitable for the thickness of less than 0. 25mm, a tensile strength greater than 1. 33kNm the paper, and the thickness of 0. 25mm ~ 1. 4mm cardboard. MIT method chuck having an adjustable pitch for a thickness no greater than 1. 25mm in paper and paperboard.

GB/T 457-2008: Paper and board -- Determination of folding endurance

---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.
Paper and board. Determination of folding endurance ICS 85-010 Y30 National Standards of People's Republic of China Replacing GB/T 457-2002, GB/T 1538-1979, GB/T 2679.5-1995 Paper and cardboard folding endurance (ISO 5626.1993, Paper- Determinationoffoldingendurance, MOD) Posted 2008-08-19 2009-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This revised standard adopts the ISO 5626.1993 "Determination of paper folding," which cardboard folding tester Schopper relevant international law does not standard. This standard and ISO 5626.1993 The main differences are as follows. --- Cancel the ISO 5626. Determination Le Molin (KhlerMmolin) and Luo Maji (Lhomargy) two instruments of 1993 method; --- Increasing the Schopper instrument cardboard folding method. This standard is the "measurement of paper folding endurance (Schopper method)" on GB/T 457-2002, measured GB/T 1538-1979 "of folding cardboard Paper and cardboard folding of titration (Schopper type tester) "and GB/T 2679.5-1995" (MIT folding tester Act) "three criteria Integration of amendments. This standard replaces GB/T 457-2002, GB/T 1538-1979 and GB/T 2679.5-1995. This standard and GB/T 457-2002, GB/T 1538-1979 and GB/T 2679.5-1995 compared to the main differences are as follows. --- Increasing the foreword; --- Increasing the normative references (Chapter 2 of this edition); --- Test method to increase the general requirements (edition 9.1); --- Test method increases the MIT instrument (edition 9.3); --- Modify the sample preparation, in the direction of the test requirements were cut at least 10 samples; sample width is 15.0mm ± 0.1mm, Length of the instrument using the effective length; --- Increasing the description of the instrument (see Appendix A); --- Increased equipment maintenance and calibration (see Appendix B); --- Increased in this standard with the corresponding ISO 5626.1993 chapter number table (see Appendix C); --- Increased this standard and ISO 5626.1993 Differences and technical reasons (see Appendix D). This standard Annex A, Annex B is normative appendix, Appendix C, Appendix D is informative appendix. The standard proposed by China National Light Industry Council. This standard by the National Standardization Technical Committee of the paper industry. This standard was drafted. China Pulp and Paper Research Institute. The main drafters of this standard. Wang. This standard replaces the standards previously issued as follows. --- GB/T 457-1964, GB/T 457-1979, GB/T 457-1989, GB/T 457-2002; --- GB/T 1538-1979; --- GB/T 2679.5-1981, GB/T 2679.5-1995. The standard National Standardization Technical Committee commissioned the paper industry is responsible for interpretation. Paper and cardboard folding endurance

1 Scope

This standard specifies the determination of paper and cardboard folding Schopper method and MIT method, we proposed to use the instrument should comply with the conditions and Use each instrument precautions to be taken. Schopper method is suitable for a thickness of less than 0.25mm, a tensile strength greater than 1.33kN/m paper, and the thickness of 0.25mm ~ 1.4mm cardboard. MIT method with adjustable spacing chuck for a thickness no greater than 1.25mm of paper and paperboard.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 450 and take samples to an aspect of paper and paperboard samples, positive and negative determination (GB/T 450-2002, ISO 186. 2002, MOD) GB/T 10739 paper, paperboard and pulp sample processing and testing standard atmospheric conditions (GB/T 10739-2002, eqv ISO 187. 1990)

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Sample fold backwards first, then fold forward at the same pincher, a complete specimen reciprocate back and forth. 3.2 Tension tested under standard conditions, the number of samples at break double folding number (base 10). 3.3 Number of folding against average. Principle 4 Under standard conditions, the sample subjected to the action of longitudinal tension, folded forward and backward, until the specimen breaks.

5 Instruments

5.1 folding tester (see Appendix A) Folding tester maintenance and calibration see Appendix B. 5.2 fold near the head temperature measuring device Note. Due to the heat the specimen chuck folded or instrument generated by the motor is transferred to the sample, causing heating of the sample test area will lead to sample local embrittlement resistance, Fold decreased. Through the rest of the instrument and the motor insulation, and folded around the head area for effective ventilation, so that these effects can be reduced Min. 5.3 If desired, the apparatus may be used as space folded around the head for ventilation, such as installing a fan in the vicinity of the folding head, air can flow

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