Introduction to the quality control method and testing instrument of moisture-proof packaging

Moistureproof packaging is widely used in machinery, electronics, food, medicine, daily chemical and other fields It is a common form of Zui in the protection measures taken to protect products from water vapor in the circulation process Moisture proof packaging plays an important role in preventing the contents from rusting and deterioration GB / T 5048-1999 "moisture proof packaging" standard has made clear provisions on the level and test method of moisture-proof packaging Labthink blue light (), as a provider of testing instruments and services, now introduces the requirements of its standards for testing methods in combination with relevant testing instruments Details I The standard level of moisture-proof packaging requirements moisture-proof period temperature and humidity conditions product properties Level 1 moisture-proof packaging: products with temperature of more than 30C in one or two years, relative humidity of more than 90% sensitive to humidity, easy to rust, easy to mildew and deteriorate, level 2 moisture-proof packaging 0.5-1 year temperature between 20 ℃ and 30 ℃, relative temperature between 70% and 90%, products that are slightly sensitive to humidity, more expensive and denser 3 Products with temperature less than 20 ℃ and relative temperature less than 70% and not sensitive to humidity within 0.5 years of grade a moisture-proof packaging II Requirements of moisture-proof packaging on moisture-proof performance, sealing and sealing performance of packaging materials 1 Moisture-proof packaging Requirements for material moisture-proof performance (moisture resistance): moisture permeability of moisture-proof packaging materials or packaging containers shall be selected according to the following table according to the level of moisture-proof packaging For moisture-proof packaging materials, the water vapor permeability shall comply with the provisions of GB / T 1037 (plastic film and sheet water vapor cup method), the moisture permeability of moisture-proof hard packaging containers shall comply with the relevant provisions of GB / T 6981 (test method of moisture permeability of hard packaging containers), and the moisture permeability of soft packaging containers shall comply with the provisions of GB / T 6982 (test method of moisture permeability of soft packaging containers) ）Relevant provisions of Moisture proof packaging grade film, g / (M 2.24 h) container, g / (m2.30d) grade 1 moisture-proof packaging < 2 < 5 level 2 moisture-proof package < 5 < 120 Level 3 moisture-proof package < 15 < 450 2 Sealing thermal strength requirements of moisture-proof packaging materials: the sealing thermal strength of moisture-proof packaging shall be tested according to gjb145 a-1993 (protective packaging specification), which shall be greater than 30 n / 5 cm 3 The sealing performance requirements of moisture-proof packaging shall be in accordance with GB / T 15171（ Test method for sealing performance of soft package) requires that the package shall be free of pinholes, cracks, open seals and other defects 3、 Moisture proof packaging test and test method 1 Moisture proof packaging and material water vapor permeability test The detection of moisture-proof packaging materials needs to be tested by the cup method according to the provisions of the standard The cup method is actually another name for the weight method to test the water vapor transmission The principle is to use the method of weighing, through measuring the change of the weight of the moisture permeable cup in unit time to calculate the parameters such as the moisture permeability of the sample In this paper, the tsy-t series instruments of Labthink blue light are introduced as an example There are four instruments in this series, all of which adopt the principle of the weight method The traditional test method is to use the moisture permeable cup, constant temperature and humidity box and balance to weigh manually However, due to the small water vapor transmission of the moisture-proof packaging, there are many manual intervention links using this method, so the impact on the test results is large, which is manifested in the problems of long test time and low precision The tsy-t series moisture permeability tester of L abthink blue light not only conforms to the test requirements specified in the standard, but also the international * full-automatic test mode It only needs to put the prepared sample into the moisture permeability cup After starting the test, the instrument can automatically run, judge the test process and end the test, and automatically issue the test report The test process is intelligent, without human intervention, and the test data is reliable In addition, according to the actual application, the packaging materials need to go through multiple production processes such as molding, filling contents, hot pressing and sealing, which often leads to uneven thickness, poor sealing and other problems, which requires not only the detection of packaging materials, but also the detection of the entire moisture-proof packaging The perme W3 / 330 water vapor transmittance test system of L abthink blue light meets the needs of dual test In addition, the instrument adopts the mode of host and satellite machine One host can carry 9 satellite machines to realize the simultaneous test of 30 kinds of materials 2 Test on sealing heat sealing strength of moisture-proof packaging materials the sealing heat sealing strength of moisture-proof packaging shall be tested according to gjb145 a-1993 (protective packaging specification), which shall be greater than 30 n / 5 cm In practice, there is a test standard QB / T 2358 (test method for heat sealing strength of plastic film packaging bags), which can be executed according to In order to carry out the inspection method specified in the standard, two equipment, i.e heat sealing tester and tension tester, are required The heat sealing tester is to simulate the three parameters of the production line sealing temperature, time and pressure in the production process to heat seal the sample The hst-h3 heat sealing tester of Labthink blue light is the test instrument for the sample preparation of sealing heat sealing strength test link in the laboratory Tensile testing machine is to apply tensile force to the sealing part to separate it, so as to test the sealing thermal strength Labthink blue light XLW series intelligent electronic tensile testing machine is specialized in testing the sealing thermal strength of moisture-proof packaging materials It only needs to select the test function of "thermal strength" to complete the test automatically In addition, it also has the functions of testing the tensile strength and elongation of moisture-proof packaging, the peel strength between composite film layers, tear strength, puncture performance, etc 3 Test on sealing performance of moisture-proof packaging test on sealing performance of moisture-proof packaging shall be conducted in accordance with the provisions of GB / T 15171 (test method for sealing performance of soft packaging) In this paper, the mfy-01 sealing tester of Labthink blue light is taken as an example, which is composed of a main machine, a vacuum generator and a vacuum tank Through the test to check whether the package has pinholes, cracks and open seals and other defects First place the package in a vacuum tank filled with water medium, set the vacuum degree holding time at 30-60 s, and set the vacuum degree as one of the following values: 20, 30, 50, 90 kPa, etc., start the test to reach the vacuum degree and maintain the vacuum degree within the set time Observe the leakage of the sample during vacuumizing and vacuum holding, depending on whether there is continuous bubble generation A single isolated bubble is not considered as sample leakage The above is a brief introduction of moisture-proof packaging standards, testing methods and instruments Labthink Languang hopes to have a comprehensive exchange with colleagues in the industry on more quality control and testing items and methods Jinan Languang Electromechanical Technology Co., Ltd.: Jinan Languang marketing department: