Test method for water vapor permeability of the ho

2022-07-27
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Test method for water vapor permeability of permeable wound dressing Abstract: permeable wound dressing must have good water permeability and air permeability to keep the wound high humidity. The domestic biodegradable plastic packaging market is also expanding in a low acid and low oxygen environment to promote its rapid healing; Therefore, its water vapor transmission rate is an index strictly controlled by various production enterprises

key words: detection of water vapor transmission rate of permeable wound dressing, detection of water vapor transmission rate of contact wound dressing, detection of water vapor transmission rate

text:

4 According to the control mode, there are mainly open-loop control (manual control) and closed-loop control (automatic control) for dressing coverage to protect, so as to provide an environment conducive to wound healing and promote tissue repair. Wound healing is an important prerequisite for post-traumatic functional recovery. Therefore, with the rapid development of modern science and technology and the birth of multi-functional products, The traditional gauze dressing with simple covering function can no longer meet the needs of modern clinical practice, and a new material such as permeable wound dressing has emerged. It can not only fully protect the wound, but also promote tissue repair, antibacterial sterilization and accelerate wound healing, which is in line with the development direction of modern medicine. The permeable wound dressing must have good water permeability and air permeability to keep the wound in a high humidity, low acid and low oxygen environment, so as to promote its rapid healing; Therefore, its water vapor transmission rate is an index strictly controlled by various production enterprises. Next, Labthink blue light and w3/060 water vapor transmission tester will briefly introduce the water vapor transmission rate of permeable wound dressing

I. significance of detecting the water vapor transmission rate of permeable wound dressing

skin is a barrier to maintain the stability of the internal environment and prevent microbial invasion. Many local and systemic infections occurring after trauma will increase at a rate of more than 15% every year, and are always related to the loss of skin barrier. Permeable wound dressing can seal the wound as soon as possible, reduce the infection caused by pathogenic bacteria, and improve the survival rate of severe trauma. If the water vapor permeability of the permeable wound dressing is too high, it is not easy to maintain the moist environment of the wound; If the water vapor transmission rate is too low, it will affect the normal metabolism of the body. Therefore, each manufacturer must control its water vapor transmission rate at an appropriate value

II. Test method for water vapor transmission rate of permeable wound dressing

the test method for water vapor transmission rate of permeable wound dressing shall refer to yy/t0471.2 test methods for contact wound dressings Part 2: water vapor transmission rate of permeable membrane dressings, that is, under a certain temperature, a specific humidity difference is formed on both sides of the sample, and the water vapor enters the dry side through the sample. By measuring the change of the weight of the permeable cup over time, Thus, the water vapor transmittance and other parameters of the sample can be obtained

labthink w3/060 water vapor transmission tester adopts high-precision weighing sensor to improve the test accuracy, effectively shorten the judgment time of osmotic balance in the test process, and then effectively shorten the time of the whole test. Secondly, the temperature and humidity control technology and weighing technology are jointly designed and cooperated with computer control technology to realize the test and weighing in the test environment without manual intervention, so that the test process is completely free from external influence, the test results are more accurate, and fully meet the requirements of moisture permeability test of high resistance materials such as aluminum foil

of course, after ensuring that the water vapor permeability index of permeable wound dressing is qualified, liangtieshan, chairman of Pingmei Group, also told Caixin that he should control some other indicators such as gas permeability, mechanical strength and histocompatibility, so as to ensure its quality and adaptability. For more information about relevant testing instruments, you can log in to Jinan LAN GuangGuan to view specific information. Jinan Languang Electromechanical Technology Co., Ltd. is willing to take this opportunity to enhance exchanges and cooperation with enterprises and institutions in the industry

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