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    Home > Active Ingredient News > Drugs Articles > Test method for water vapor barrier performance of aluminum coated BOPP tape

    Test method for water vapor barrier performance of aluminum coated BOPP tape

    • Last Update: 2018-03-13
    • Source: Internet
    • Author: User
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    Abstract: aluminized BOPP tape has the functions of heat preservation, heat insulation and moisture resistance In order to protect the product from water erosion in the environment, it is necessary to strengthen the detection of water vapor barrier performance of aluminized BOPP tape In this paper, the W3 / 062 water vapor transmission test system independently developed and manufactured by Jinan Languang mechanical and Electrical Technology Co., Ltd is used to test the water vapor transmission of aluminum coated BOPP tape samples, and the parameters, application scope and test process of the equipment are described in detail, which provides reference for monitoring the moisture resistance performance of aluminum coated BOPP tape related industries Key words: tape, aluminized BOPP tape, water vapor barrier performance, moisture resistance, water vapor transmission, water vapor transmission test system 1 Significance aluminized BOPP Adhesive tape is an ideal supporting protective layer for the new generation of heat preservation, heat insulation and sound insulation building materials It can partially replace aluminum tape, and be used as the outer binding material for the heat preservation layer of heating and cooling equipment, pipes, etc., as well as the moisture-proof, mildew proof and corrosion-resistant materials for the roof heat insulation and sound insulation veneers and equipment The level of water vapor barrier performance is an important factor affecting whether the BOPP tape can meet the above purposes Take the moisture-proof and mildew proof of the equipment as an example, if the BOPP tape is aluminized The water vapor transmission rate of the belt is relatively high, that is, the water vapor barrier to the environment is poor, more water vapor will penetrate into the belt, resulting in corrosion and mildew of the equipment due to the contact with more water Therefore, the water vapor barrier performance of aluminum-plated BOPP tape is one of the key performance that should be monitored by relevant enterprises In this paper, the water vapor transmittance of aluminum-plated BOPP tape is tested to analyze its water vapor barrier performance Fig 1 BOPP tape with aluminum plating 2 At present, there are four methods to test the water vapor transmittance of materials, including cup method, electrolysis method, infrared method and humidity method Among them, the cup method is divided into weight increasing method and weight reducing method In this paper, according to GB / T 15331-1994 "pressure sensitive adhesive tape test method of water vapor transmittance" as the test method 3 Test sample a brand of aluminum coated BOPP tape 4 The equipment used in this test is W3 / 062 water vapor transmittance test system, which is independently developed and produced by Jinan Languang Electromechanical Technology Co., Ltd Fig 2 W3 / 062 water vapor transmission test system 4.1 test principle weight increase method is to calculate the water vapor transmission of the sample according to the increase of the weight of the moisture permeable cup The specific realization process is to place desiccant in the moisture cup, seal the sample at the opening of the moisture cup, and control the humidity in the test chamber of the equipment to form a certain humidity difference on both sides of the sample, so as to provide power for water vapor to penetrate into the moisture cup from the test chamber through the sample The water vapor permeated into the water permeable cup is absorbed by the desiccant, which causes the weight of the water permeable cup to change Through testing the increase of the weight of the water permeable cup with time, the water vapor transmittance of the sample is obtained 4.2 scope of application (1) this equipment is applicable to water vapor transmission test of various types of materials, such as pressure-sensitive adhesive tape, plastic film, paper plastic composite film, geomembrane, aluminized film, aluminum plastic composite film, waterproof and breathable film and other film materials, PP sheet, PVC sheet, PVDC Sheet and other engineering plastics, rubber, building materials and other sheet materials, cigarette wrapped aluminum foil paper, Tetra Pak and other paper and cardboard materials, waterproof and breathable fabrics, diaper non-woven fabrics, non-woven fabrics for sanitary products and other materials In addition, it can also be extended to test the moisture permeability, water resistance and moisture retention of artificial skin, medical supplies and accessories, solar backboard, LCD film, paint film, cosmetics, biodegradable film and other materials and products (2) This equipment meets many national and international standards, such as GB / T 15331, GB 1037, GB / T 16928, ASTM e66, ASTM D1653, TAPPI t464, ISO 2528, DIN 53122-1, JIS z0208, YBB 00092003, etc 4.3 the equipment parameters can realize two test modes of weight increase method and weight reduction method The test range of weight gain method is 0.1 ~ 2500 g / (M 2 · 24h), the test range of weight loss method is 0.1 ~ 10000 g / (M2 · 24h), the test accuracy is 0.01 g / (M2 · 24h), and the system resolution is 0.001 G Automatic temperature and humidity control, wide range, high precision, temperature control range of 15 ~ 55 ℃, temperature control accuracy of ± 0.1 ℃, weight reduction method humidity control range of 70 ~ 90% RH, weight increase method humidity control range of 10 ~ 98% RH, humidity control accuracy of ± 1% RH, which can achieve the test of water vapor permeability under different temperature and humidity conditions, and the purging wind speed range is 0.5 ~ 2.5 m / s, and the sample size is Ф 74 mm The test area is 33 cm 2 The system automatically weighs intermittently, and the system automatically clears before each weighing The test chamber can hold 6 moisture cups, each of which can be tested independently, and 6 kinds of same or different samples can be tested at the same time Support Lystem TM lab data sharing system 5 During the test (1) three samples with a diameter of 74 mm were cut from the surface of the aluminum coated BOPP tape (2) A certain amount of anhydrous calcium chloride which has been dried is put into the desiccant cup as desiccant, and the three samples are sealed on three desiccant cups respectively (3) Place the moisture cup with the sample clamped on the moisture cup holder in the test chamber of the equipment, and close the door of the test chamber (4) In the system software part, set the sample thickness, test temperature and humidity (38 ℃, 90% RH), test time interval and other parameter information, click the test option to start the test The equipment automatically tests the weight of the moisture permeable cup according to the set time interval, and calculates and displays the test results such as the water vapor transmittance of the sample according to the test data 6 The results showed that the water vapor transmittance of the three samples were 3.4478 g / (M 2 · 24h), 3.4215 g / (M2 · 24h) and 3.4589 g / (M2 · 24h) 7 Conclusion the whole test process is easy to operate and the equipment is highly intelligent According to the above test results, the uniformity of the test results of the water vapor transmittance of the aluminum coated BOPP tape sample is good, which shows that the moisture resistance performance of each part of the sample is uniform W3 / 062 water vapor transmissivity test system is a professional test equipment for testing the barrier performance of film and sheet to external water vapor It has the advantages of high detection accuracy and good repeatability of test results, taking into account two test methods, i.e weight increase method and weight loss method As a supplier of packaging testing equipment, Labthink Languang has always been committed to providing professional packaging testing equipment and testing services for customers around the world The more you understand, the more you trust! Jinan Languang Electromechanical Technology Co., Ltd is willing to take this opportunity to enhance technical exchanges and cooperation with enterprises and institutions in the industry    
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