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GB/T 2679.2-2015 English PDF

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GB/T 2679.2-2015: Sheet materials -- Determination of water vapour transmission rate -- Gravimetric (Dish) method
Status: Valid

GB/T 2679.2: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 2679.2-2015	English	209	Add to Cart	3 days [Need to translate]	Sheet materials -- Determination of water vapour transmission rate -- Gravimetric (Dish) method	Valid	GB/T 2679.2-2015
GB/T 2679.2-1995	English	199	Add to Cart	3 days [Need to translate]	Paper and board. Determination of water vapour transmission rate(Dish method)	Obsolete	GB/T 2679.2-1995
GB 2679.2-1981	English	199	Add to Cart	2 days [Need to translate]	Paper and paper board--Determination of transwettability and fold-trace transwettability--Dish method	Obsolete	GB 2679.2-1981

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Basic data

Standard ID	GB/T 2679.2-2015 (GB/T2679.2-2015)
Description (Translated English)	Sheet materials -- Determination of water vapour transmission rate -- Gravimetric (Dish) method
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	Y30
Classification of International Standard	85.010
Word Count Estimation	10,154
Date of Issue	2015-09-11
Date of Implementation	2016-04-01
Older Standard (superseded by this standard)	GB/T 2679.2-1995
Quoted Standard	GB/T 450; GB/T 10739
Adopted Standard	ISO 2528-1995, MOD
Regulation (derived from)	National Standard Announcement 2015 No.25
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 sheet materials and methods for weight moisture permeability (moisture-cup) Determination of moisture permeability of the crease. This Standard applies to the flat, can hinder the tissue water vapor permeable packaging materials such as paper, cardboard, plastic film, paper and film or metal foil in line with materials, rubber or plastic coated fabrics. This method is not applicable under the test conditions and damage due to contact with hot wax or significant shrink film. For moisture permeability of less than 1g/(m2 �� 24h) or greater than the material thickness of 3mm, so that this method is not recommended.

GB/T 2679.2-2015: Sheet materials -- Determination of water vapour transmission rate -- Gravimetric (Dish) method

---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.
Sheet materials. Determination of water vapour trasmission rate. Gravimetric (Dish) method ICS 85.010 Y30 National Standards of People's Republic of China Replacing GB/T 2679.2-1995 Determination of moisture permeability of sheet materials Weight (permeable cup) Method Gravimetric (Dish) method (ISO 2528.1995, MOD) Issued on. 2015-09-11 2016-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard replaces GB/T 2679.2-1995 "Paper and cardboard crease moisture permeability and moisture permeability measurement (disc method)", and GB/T 2679.2- The main technical changes compared to 1995 are as follows. --- Modify the standard name; --- Expanding the scope of the standard; --- Permeable cup inner diameter increases the accuracy requirements; --- Increasing the temperature and humidity constant temperature and humidity test equipment and conditions; --- Modified by the temperature (38 ± 0.5) ℃ to (38 ± 1) ℃; --- Increased use of blank samples; --- Modify the sample wax seal requirements; --- Modify the number of tests; --- Increasing the method of drawing moisture permeability calculated. This revised standard adopts ISO 2528.1995 "sheet materials moisture permeability measured by weight (moisture-cup) Act." This standard and ISO 2528.1995 compared to the main technical differences are as follows. --- On normative references, this standard has been adjusted technical differences, in order to adapt our technical conditions, the adjusted situation Focus is reflected in the status of Chapter 2, "Normative references", the specific adjustments are as follows. ● Modify with international standards of GB/T 450 instead of ISO 186; ● use equivalent to international standards of GB/T 10739 instead of ISO 187; --- Permeable cup different dimensions; --- Crease fold through different sample preparation methods and humidity; --- Modify the formula crease moisture permeability; --- Remove the ISO 2528.1995 in the informative Appendix C. This standard and ISO 2528.1995, compared with more adjustments are given in Appendix A of this standard and ISO 2528 in the structure. Chapter 1995 Article ID Control List. Please note that some of the content of this document may involve patents. Release mechanism of the present document does not assume responsibility for the identification of these patents. The standard proposed by China National Light Industry Council. The standard paper by the National Standardization Technical Committee (SAC/TC141) centralized. This standard was drafted. Zhejiang Kane specialty materials Co., Ltd., China Pulp and Paper Research Institute, the national paper quality supervision and inspection Test center. The main drafters of this standard. Zhangqing Wen, Chen Wanping, Yin Qiao, Li Dafang, Li Lu. This standard replaces the standards previously issued as follows. --- GB/T 2679.2-1981; GB/T 2679.2-1995. Determination of moisture permeability of sheet materials Weight (permeable cup) Method

1 Scope

This standard specifies the moisture permeability of sheet materials and methods weight (permeable cup) Determination of moisture permeability of the crease. This standard applies to flat, thin pages can hinder the water vapor permeability of packaging materials, such as paper, cardboard, plastic film, paper and film or metal Foil composite materials, rubber or plastic coated fabrics. This method is not applicable under the test conditions due to contact with hot wax and damage or bright Significantly shrink film. Moisture permeability of less than 1g/(m2 · 24h) or greater than the material thickness of 3mm, so that this method is not recommended.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. 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 document. 3.1 Moisture permeability watervapourtransmissionrate Under specified temperature and humidity conditions, the quality of water vapor per unit time through unit area of \u200b\u200bspecimen. In grams per square meter per 24 hours expressed [G/(m2 · 24h)]. Note. The material moisture permeability depending on the thickness, composition and permeability, as well as temperature and relative humidity testing. 3.2 Crease moisture permeability watervapourtransmissionrateofcreasedmaterials Moisture permeability under the same test conditions, the crease of the sample moisture permeability difference and moisture permeability of the sample did not fold to 24h through the 100m long Sample mass of water vapor crease representation [g/(24h · 100m)]. Principle 4 Interior desiccant material to be measured by the sealing permeable cup is placed in conditions controlled temperature and humidity in the atmosphere, at the appropriate time interval weighing through Quality wet cup. When the increase in quality and the time interval is proportional to the moisture permeability can be calculated.

5 test equipment and materials

5.1 permeable cup 5.1.1 made of aluminum or stainless steel, its diameter should be suitable for weighing in the balance. Light tough quality requirements, under the experimental conditions with

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