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GB/T 22819-2008: High permeable paper -- Determination of air permeability
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 22819-2008 | English | 139 |
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High permeable paper -- Determination of air permeability
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GB/T 22819-2008
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Basic data | Standard ID | GB/T 22819-2008 (GB/T22819-2008) | | Description (Translated English) | High permeable paper -- Determination of air permeability | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y32 | | Classification of International Standard | 85-010 | | Word Count Estimation | 6,668 | | Date of Issue | 2008-12-30 | | Date of Implementation | 2009-09-01 | | Quoted Standard | GB/T 450; GB/T 10739 | | 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 method for determination of high permeability permeability of the paper. This standard applies to air permeability greater than 1 X 102 ��m/(Pas) paper. | GB/T 22819-2008: High permeable paper -- Determination of air permeability---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.
High permeable paper. Determination of air permeability
ICS 85-010
Y30
National Standards of People's Republic of China
High permeability paper Determination of air permeability
Posted 2008-12-30
2009-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
The standards in the original light industry standard QB/T 1461-1992 "high air permeability assay paper" on.
Appendix A of this standard is an informative annex.
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, China Paper Association Professional Committee of Standardization.
The main drafters of this standard. Qiuwen Lun.
High permeability paper Determination of air permeability
1 Scope
This standard specifies the method for determination of high air permeability of the paper.
This standard applies to air permeability of greater than 1 × 102μm/(Pa · s) of paper.
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 450-2008, 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
When a pressure differential exists on both sides of the paper, the performance of the air through the paper.
3.2
Under the conditions specified in units of time and a predetermined pressure, the average air flow through the unit area of \u200b\u200bthe paper that, in cubic centimeters per
Cm sec [cm3/(cm2 · s)] FIG.
3.3
Under the conditions specified in units of pressure per unit time and the average air flow rate per unit area of \u200b\u200bthe paper adopted in microns per Paz
Cards second [μm/(Pa · s)] represent [1mL/(m
2 · Pa · s) = 1μm/(Pa · s)].
Principle 4
According to methods and test parameters specified in the specimen holder in the instrument ventilation air intakes, and then adjust the fan speed, so that both sides reach a sample
Predetermined pressure, measured air permeability of the paper according to size orifice size and pressure on both sides.
5 Equipment
5.1 Measurement of air permeability of the instrument shown in FIG. 1, which mainly consists of from 5.2 to 5.6 part specified.
5.2 specimen clamping devices. make the specimen deformation, the edge does not leak. This means to ensure that (38.5 ± 0.2) cm2 test area.
5.3 Fan. variable speed, air can be sucked so that both sides of the paper to the desired pressure.
5.4 inclined manometer and a vertical manometer. for measuring differential pressure. Inclined gauge range is 0 ~ 245Pa (0 ~ 25mm water column), vertical
Straight gauge range is 0 ~ 3922Pa (0 ~ 400mm water column).
5.5 Determination of air flow means and a calibrated orifice. its flow deviation shall not exceed ± 2%.
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