Device and method for testing air permeability of non-woven fabric material

Abstract

The invention discloses a device for testing the air permeability of a non-woven fabric material. The device comprises a test box and a vacuum pump; a non-woven fabric material; a negative pressure pumping pipe and a negative pressure pumping air inlet pipe which are connected with the test box, wherein the other end of the negative pressure pumping pipe is connected with a pumping connector of the vacuum pump, and an exhaust connector of the vacuum pump is connected with a flow meter. A vacuum degree meter is mounted on the negative pressure pumping pipe, and an air inlet control valve is mounted on the negative pressure pumping air inlet pipe. The device also comprises an air tightness detection branch which is connected with the negative pressure pumping pipe and the negative pressure pumping air inlet pipe through a three-way joint; an airtight branch control valve is mounted on the airtight detection branch. The invention further discloses a method for testing the air permeabilityof the non-woven fabric material. The device is simple in structure, convenient to use, accurate in testing, easy to overhaul and maintain and the like.

Description

technical field [0001] The invention belongs to the field of air permeability testing of cloths, and provides a device and a testing method for air permeability testing of nonwoven fabric materials. Background technique [0002] Air permeability refers to the barrier effect of test materials, including textile fabrics, non-woven fabrics, paper, sheet materials, and film materials, on gas permeability performance under certain test conditions. [0003] Due to its light weight, softness, hydrophobicity, good air permeability, non-toxic, antibacterial and other advantages, non-woven fabrics have been widely used in medical and health, family life, industrial and agricultural production and other fields, such as medical and health for making surgical gowns, Protective clothing, disinfection wraps, diapers, sanitary napkins, home decoration for wall coverings, bed sheets, bedspreads, industrially used for various substrates, reinforcing materials, filter materials, etc. [0004]...

AI Technical Summary

Problems solved by technology

[0005] The invention patent in the prior art (publication number: CN 101571472A) discloses "a gas permeability test fixture, tester and test system". Tightness

A large number of nuts are used in the connection process of the upper and lower dies, the operation is cumbersome, it is difficult to ensure the good sealing of the system, and only meets the test requirements of one size sample

[0006] The invention patent in the prior art (authorized announcement number: CN 206399787 U) discloses "a fabric air permeability testing device". This device is relatively simple and has improved sealing performance, but the connection between the gland and the lower sleeve is more complicated , the lack of a tightness test system reduces its reliability, and it can meet the limited size and types of test samples

[0007] The invention patent in the prior art (authorized announcement number: CN 202024948 U) discloses a "material gas permeability test device". This device is used to test whether the thin plate-shaped material has gas permeability. This device is too simple. The upper and lower container chambers are fixed with a large number of bolts, and the sealing and uniformity of the sealing are difficult to guarantee and detect, and may be deformed after long-term use

The types of air permeability materials that can be tested are limited, the applicability is not strong, and the value of air permeability cannot be quantitatively determined

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