This standard specifies the determination of moisture permeability of sealed flexible packaging containers. This standard applies to the determination of moisture permeability of sealed flexible packaging containers after single or multiple transport packaging tests. GB/T 6982-2003 Test method for moisture permeability of flexible packaging containers GB/T6982-2003 Standard download decompression password: www.bzxz.net
This standard specifies the determination of moisture permeability of sealed flexible packaging containers. This standard applies to the determination of moisture permeability of sealed flexible packaging containers after single or multiple transport packaging tests.

1cs 55.140
National Standard of the People's Republic of China
GB/T6982—2003
Replacement of GB/T6962—1086
Test methods for water vapor permeability of flexible containers2003-11-04 Issued
People's Republic of China
National Quality Supervision, Inspection and Quarantine Administration
2004-05-01 Implementation
GB/T 6982-2003
21986 The specification of the test method 3 for flexible packaging containers under strong pressure has the following changes compared with GB/T6982-1986
hand standard Chen Laoshi (B/6382
) The standard text format has been modified according to the requirements of GB/1.1-2050: the section "clock fee test light" has been added and the sections "test conditions" and "test age procedure" have been adjusted. This standard replaces GB H/6987—1999. This standard was proposed by China Machinery Industry Federation: This standard is mainly from the Ministry of Machinery Science and Technology.
This standard is mainly developed by: China Academy of Mechanical Science, Guangzhou Electric Science Research Institute of China Machinery Industry Corporation, National Import and Export Product Packaging Inspection Center, Jiangsu Shengya Investment Co., Ltd., Changzhou Sinochem Material Co., Ltd. The main drafters of this standard: Li Xuelong, Peng Shu, Liu Jinfeng, Zeng Yuli, Gu Taosong: This standard replaces the previous version of the standard: GB/T 6S82-1:986..
1 Scope
Soft packaging container humidity test method
This standard specifies the determination of humidity in sealed soft packaging containers. GE/T 6982—2003
This standard applies to the selection of the degree of compliance of the following sealed flexible containers after single or multiple packaging tests. 2 Normative references
The clauses in the following documents become the references of this standard through reference in this standard. For any referenced document with a reference date, all subsequent corrections (excluding errata) or revised versions are not applicable to this standard: For any referenced document with a reference date, the parties to the standard may use the new version of these documents. For any referenced document with a reference date, its new version is applicable to this standard. GB/T 4122.1 Packaging specification
3 Terms and definitions
GB/T 41.1 and the following terms and definitions are applicable to this standard. 3. 1
Waterproofness of flexible containers Moisture permeability of packaging containers
The amount of moisture in a sealed flexible packaging container when the internal air is kept dry under the specified conditions and time. Unit: g.md.
Hot test atmospheric conditions: relative humidity is kept at %~1%, and the temperature is kept at a constant wet heat test air condition of 40 ± 1%. 4 Test purpose
4.1 To screen the materials, structures and process measures used in packaging containers in detail, 4. To compare the moisture resistance of different types of packaging containers. 4.3 To determine the suitability of moisture protection measures for special products, 4.4 To determine the indicators and control methods for the moisture resistance performance requirements of packaging containers, etc. 5.1 Test chamber (room) 5.1.1 Temperature and humidity sensors and measuring devices shall be installed in the test chamber (room) to control and observe the temperature conditions in the chamber (room). 5.1.2 The relative humidity and humidity of the working space of the test chamber (room) shall be maintained within the specified range and continuously circulated around the specimen. During the test, no drop phenomenon shall occur on the specimen. 5.1.3 Test The condensed water in the box (room) should be discharged continuously. The discharged condensed water shall not be used as a source of water before it is purified. 5.1.4 The temperature and humidity in the working space of the test box (room) should be uniform and consistent with the numerical value of the control point as much as possible. 5.1.5 The condensed water on the top and bottom of the test (room) shall not drip onto the sample. 5.2 Weighing balance 5.2.1 Suitable experimental balance. The sensitivity is 11GA/T 6982—2003
5.2.2 When testing products weighing 1 kg or more, the accuracy of the balance should not be less than one ten-thousandth of the product packaging weight.
6 Sampleswww.bzxz.net
6.1 The samples should be representative and should be typical. 6.2 The surface size and shape of similar samples should be as consistent as possible; the desiccant inside should be (close to) equal. This is to facilitate the comparison of test results.
6.3 The amount of
should be guaranteed to maintain the internal explosion during the test. Each container should be placed The amount of desiccant that can be accommodated in the body is less than 8g. The amount of desiccant that can be accommodated in the body should be counted and the desiccant should be kept away from the desiccant before use. 6.4 Requirements for dyeing
It should have a high affinity for water and have a good desiccant effect. After absorbing a large amount of water, it has only a low water content. It can be used with fine-pored desiccant, or other saturated materials with equivalent or better performance, such as anhydrous calcium oxide. The desiccant is in the form of small particles or small lumps. When used, the particle size of the sieve should be less than 6.5. The powder size of the sieve should be less than 3000 mm. Conditions for treatment of desiccant
The drying time of porous glue at 15℃ shall not exceed 10 hours, and the drying time of calcium fluoride shall not exceed 21 hours. The thickness of desiccant shall not exceed 25TL:
6.6 When the test is to be carried out with a special packaging container for a special product (which should be high-quality), the desiccant can be replaced by a dry product. However, at this time, the container should be filled to the actual capacity of the container and the water content of the product should be determined before the test. 6.7 The number of test pieces is 5. For special product packaging containers, the corresponding standard should be used. 7.1 Routine test: temperature 45 ± 1, relative humidity 90% + 2%. 7.7 Secondary test: temperature 40% ± 10.5:, relative humidity 50% ± 1%, 7.3 Unless otherwise specified in the contract, 9.1 Test procedure 8.1 Sample preparation Place the selected deodorant or deodorant product in the container sample for the test. When the actual packaging has a suitable cushion, it can also be sealed accordingly. No other items should be contained. When packaging samples are delivered, they should be carried out according to the actual operating method, and the test report should be kept to explain the sealing method used. 2 Preheating treatment
Put the test sample into a test box (room) and slowly heat it up. Note: However, constant temperature can also be used to preheat the sample. At this time, the sample can be put into a wet heat test box (room) with a fixed temperature. Note that the heat is only applied to the sample.
. 3 Sensible heat test
The sample that has been heated up is transferred to a constant wet heat test box (room) for maturation test. If it is preheated in a heat-avoiding test box, Add air to the box and adjust it to 5.1.2 Specified recording format for continuous testing of samples 8.4 Regular weighing
According to the permeability of the packaging material, weigh the sample at an appropriate time, and find the relationship between the weight increase and time. The test should be continued until at least two consecutive points form a straight line. The approximate rate of this part of the line is the moisture permeability reduction during the constant weighing rate. B.4.1 The accuracy of the weighing test is determined by the judgment of the moisture permeability of the container. 2
CB/T6982—2003
The appropriate weighing interval is recommended to adopt the following weighing intervals: For containers with high permeability, the minimum weighing time is 3d: For containers with low humidity, 15~3 times are recommended. 8.4.2 When weighing, it is best not to take the sample out of the test range (room). If this is not possible, the sample can be taken out of the test room (room) and operated according to one of the following methods: 1) Take out the test pieces one at a time, and immediately put them in the test box (room) after weighing. Each weighing should be carried out in the same order:
b) Put the sample into a desiccant or container with a sealed lid (not placed in the test chamber), and then take it out one by one and weigh it in sequence. After weighing, immediately put it into another desiccant or bucket with a sealed lid (without desiccant). Each weighing should be carried out in the same order. After all weighings are completed, put them out immediately and continue with the test. 8.4.3 Test details Take the test container out of the room (room) and allow it to stand for 1 hour. When the temperature is balanced, take it out of the test box and shorten the time as much as possible. Generally, it should not exceed 3 days. 5 Calculation of humidity B.5.1 Place the container with the reagent in the test chamber and measure it according to the center. When three consecutive points are drawn in a straight line, calculate the solution and convert it into a value per 32 degrees, which is the moisture permeability of the container during the constant permeability period. In order to compare the permeability performance with other types of containers, the permeability can be converted into the value when the surface area is per square meter, unit: /㎡38.5.2 When the drying product is used in the test chamber for testing, it may not be possible to obtain the desired value. At this time, first determine the quality change of the sample before the test. After that, put the sample into the test chamber (room) for a predetermined time (pass band is ) stone, and then measure its mass or water content. The increase in mass or water content during this time is the moisture permeability value of the packaging container. The test report should include the following contents: E) Moisture barrier layer material of the flexible packaging container, packaging sealing process and materials, etc.: the type and quantity of the used products, or the description of the conditions when the product is used, including the moisture content record and determination method before the test;
The test sample
d》 If the humidity condition in the test chamber does not meet the requirements of the wood standard, the maximum change range and the time experienced should be described in detail: ) The time between the test and the test!
Permeability value·Calculate the value during the constant increase rate, and calculate the average value, maximum value and minimum value with two significant figures; if it is a new product, the water content and the net content of the contents before and after the test should be given to calculate the moisture permeability change value of 3;
The description of any other tests that the sample has been subjected to before the permeability test, R
) Tested according to this standard, and the description of the influencing effects such as the appearance changes of the sample during the test and at the end of the test,
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