Pore ​​size measuring instrument for porous material and its measuring method

A technology of porous materials and measurement methods, which is applied in the direction of measuring devices, instruments, and fluid devices, etc., can solve problems such as complex structures, and achieve the effects of small size, convenient movement, and good repeatability

CN101726271BInactive Publication Date: 2012-02-01河南建中医疗器械包装有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2012-02-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a pore size measuring instrument for porous materials, which is a box structure, which includes a mechanical part and an electronic measurement and control system. The mechanical part includes a test head, a pressure adjustment device, a test switch, a pressure Measuring device and a control panel arranged on the surface of the box body. The pore size measuring instrument can calculate the maximum pore size value of the initial sample as long as the surface tension value of the test liquid is input. The invention also discloses a method for measuring the pore diameter of porous materials: firstly, the test liquid that can completely wet the porous materials and has a constant surface tension is used to infiltrate the sample to saturate the pores of the sample, and then make the The air is forced to pass through the pores of the sample soaked by the test liquid, and the pressure required when the first bubble emerges from the gap is observed, and then the maximum pore diameter value r of the sample is calculated by the formula.
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Description

technical field

[0001] The invention relates to a measuring instrument and a measuring method suitable for measuring the maximum pore diameter of porous materials such as filter paper and cardboard, medical masks, surgical suits and the like in industries such as automobiles, medicines and laborers. Background technique

[0002] Filter paper and cardboard, medical masks, surgical gowns and medical instrument packaging paper bags used to measure automobiles, medicines, laborers and other industries are all porous materials. Pore ​​diameter is one of the basic parameters to characterize the pore characteristics of porous materials. Known methods for measuring the pore size of porous materials and their products include bubbling method, mercury intrusion method, suspension filtration method, flow rate method and microscope method, and these methods have their own advantages and disadvantages. In the patent application number 91102213.9, a "fluid penetration porosimeter and its...

Examples

Embodiment Construction

[0031] See figure 1 with figure 2 , the pore size measuring instrument for porous materials of the present invention is a box structure, including a mechanical part and an electronic measurement and control system, and the mechanical part includes a test head 1, a pressure adjustment device 2, a check switch 3, a pressure Measuring device 4 and control panel 5, wherein,

[0032] The test head 1 includes a cylindrical container 11 installed on the upper end of the box body 10, a lower pressure ring 12 arranged on the upper end surface of the cylindrical container 11, an upper pressure ring 13 located above the lower pressure ring 12, and a lower pressure ring 13 fixed on the upper pressure ring 12. The pressing handle 14 on the upper end surface of the ring 13 is connected to the locking handle 15 on the bottom edge of the cylindrical container 11 at one end; the lower pressing ring 12 is a rubber washer. The inner diameters of the upper and lower pressure rings 13 and 12 ar...