跳至主要内容

What is the impact of the mask fixed way on the breathing resistance test?

What is the impact of the mask fixed way on the breathing resistance test?

Generally speaking, the mask is a 3-layer structure, which is spunbond nonwoven(s) + meltblown nonwoven(M) + spunbond nonwoven(S), i.e. SMS structure. The outer layer is spunbond nonwoven with water-blocking effect, which can prevent droplets from entering the mask; the inner layer is nonwoven with softer material, which has moisture-absorbing effect and can discharge moisture from the mouth. The main part of the filtering effect is the middle layer of extremely fine and electrostatic meltblown nonwoven, the main material is high melt finger polypropylene, after electrostatic standing polarity treatment to achieve the standard required filtration efficiency.

N95 face mask-1.jpg

The influence of the mask fixation method on the breathing resistance test


In GB/T 32610-2016 "technical specification of daily protective masks" in the inspiratory resistance, expiratory resistance test method, the mask in the test should be adjusted to wear position of the mask and headband tightness, to ensure that the mask and the test head mold of the tight fit. In the actual test found that the exhalation, suction resistance test value by the mask with the degree of tightness, the material of the nasal strip, head mold and mask fit, testers operating differences and other factors have a greater impact. Through the comparison study between different testing organizations, it was found that different fixation methods have a greater impact on the test results.

评论

此博客中的热门博文

Multi-Functional Scratch tester For automotive interior materials

          Multi-Functional Scratch tester is applicable to all types of wiping performance test of automotive interior materials; test equipment integrated three domestic standards (fingers scraping method, a hundred grid method, and plastic scraping finger scraping method).         Scratch tester is an electronic instrument capable of measuring critical load, adhesion, scratch resistance and bond strength for a wide range of surfaces. Scratch tester measures the scratch resistance of a sliding and moving surface in the relative motion to a stylus. The stylus is forced/pressed against the moving surface with precise controlled force which is normal to the surface and tangential force at the contact has to be measured.         Scratch tester can be utilized for all type of industrial coating from the plasma layers used in semiconductor and optical technology used in decorative coatings used for automotive and consum...

Reveal the standards for textile breathability testing and let you understand it in seconds!

 Reveal the standards for textile breathability testing and let you understand it in seconds! Breathability testing is a measure of how much gas can pass through a textile. However, there is no single "optimal" air permeability value, as it depends on the specific circumstances in which the textile is used. For example, if it is used to make sportswear, it is hoped that it has good breathability; if it is used to make insulating clothes or warm clothes, it is hoped that it can block the cold well. Therefore, when testing the air permeability of textiles, the purpose of using the textile must be clearly understood in order to obtain reasonable values. In order to accurately and quickly test the true breathability performance of a sample, specially designed and developed instruments must be used. Testing methods generally include: fabric thickness (Thickness), fabric density (Density), fabric water absorption rate (Water Absorption Rate), evaporation and mass transfer (Moistur...

Test Methods of Universal Pilling Assessment Viewer (PAV)

Universal Pilling Assessment Viewer enables fabric to be assessed while still mounted on a Martindale head. The Pilling Assessment Viewer (PAV) for the textile market has been developed with the help of a major textile company in accordance to BN EN ISO 12945 standards incorporating all 3 parts and adopting the following test methods: Part 1: ICI Pilling box method (BS 5811) Part 2: Modified Martindale method (SN 198 525) Part 3: Atlas random tumble method (ASTM D 3512-96) It uses D65 Artificial Daylight (with CWF optionally available), as specified by many retailers. Other test methods can also be viewed, including those specified by major retailers. Other results of test methods that can be viewed include: BS 5811:1986 Determination of resistance to pilling and change of appearance of fabrics. ICI modified pill box for snagging Fleece appearance and surface change after washing Other test methods as specified by several major retail outlet. To optimize c...