The introduction of the test of the air permeability of the heat release adhesive film

Abstract: among all the quality control indexes, the permeability of air permeable membrane has become a common concern for the production enterprises of hair heat adhesive Key words: air permeability, air permeability film, hair heat paste, air permeability tester text: now, with the improvement of people's living standards, Hair pastes are also widely used in people's lives, and the requirements for quality control are more and more standardized Because the permeability of the breathable film directly affects the heating effect of hair pastes, the permeability of the breathable film in various quality control indicators has become a common concern of hair paster manufacturers Labthink blue light () then combined with tqd-g1 air permeability tester to test the air permeability of the heat release adhesive film 1、 The heating of the heating pad is an exothermic oxidation reaction Under the action of catalyst, high-purity iron powder reacts with oxygen in the air to release heat Because the product can't react before use, the bag material should be very special, which is composed of raw material layer, gelatin layer and non-woven fabric bag The non-woven fabric bag is made of microporous air permeable membrane; the heat release adhesive uses the air permeable membrane to control the oxygen transmission, so as to control the oxidation reaction speed and adjust the heating temperature and time If the oxygen permeability is too fast, the heat will be released immediately, and the skin may be scalded; if the oxygen permeability is too slow, there will be no temperature Therefore, the permeability of the film is an important factor that affects the heating effect of the heating adhesive, so it must be tested accordingly 2、 The test methods of air permeability of the heat release adhesive film are integrated with all standards There are two commonly used test methods for the air permeability and air resistance of materials in the world: constant pressure difference and constant flow pressure difference The flow measurement method of constant pressure difference is to measure the air flow through the given area of the sample in a certain period of time by adjusting the pressure difference between the two sides of the sample to form a constant pressure difference, and calculate the air permeability and other parameters; the method of constant flow pressure difference is to make the air flow through the sample in a constant flow, measure the pressure difference between the two sides of the sample in this condition, and calculate the air flow Resistance and other parameters The tqd-g1 air permeability tester launched by Labthink Languang has two measuring methods, i.e constant flow and constant pressure difference, to meet the requirements of different standards in the world; the host adopts electronic measurement principle, with high-precision electronic air flow and air pressure sensors built in, to ensure the accuracy of measurement; it is controlled by Microcomputer, and can be configured with computers and software, with automatic process monitoring and stable system , friendly human-computer interaction, dynamic display of test data, with storage, query, printing, drawing and communication functions, it is an indispensable equipment for testing the permeability of air permeable membrane The permeability of the heat release film is the main factor that affects its heating effect and time Of course, after the air permeability index of the air permeability membrane is qualified, it is necessary to control the air tightness and barrier of the whole outer package of the heat release sticker to ensure the quality of the products within the shelf life For more information about related testing instruments, you can log in to see the specific information Jinan Languang Electromechanical Technology Co., Ltd is willing to enhance exchanges and cooperation with enterprises and institutions in the industry.