CN111122409A - Method for testing porosity of glass fiber laminated plate - Google Patents
Method for testing porosity of glass fiber laminated plate Download PDFInfo
- Publication number
- CN111122409A CN111122409A CN201911363394.6A CN201911363394A CN111122409A CN 111122409 A CN111122409 A CN 111122409A CN 201911363394 A CN201911363394 A CN 201911363394A CN 111122409 A CN111122409 A CN 111122409A
- Authority
- CN
- China
- Prior art keywords
- glass fiber
- laminated plate
- resin
- porosity
- fiber laminated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
Abstract
The invention relates to a method for detecting the porosity of a glass fiber laminated plate, which relates to the field of the porosity detection of a glass fiber layer. The method can be used for directly observing the pores in the glass fiber laminated plate, is intuitive and accurate, avoids deviation caused by a theoretical calculation method, and can be used for intuitively reflecting the pore conditions in the sample block.
Description
Technical Field
The invention relates to the technical field of glass fiber layer porosity detection, in particular to a method for testing the porosity of a glass fiber laminated plate.
Background
The porosity of the glass fiber laminated plate is generally obtained by the following test method: the method comprises the steps of measuring the densities of resin, glass fiber and the laminated plate respectively, measuring the resin content (or glass fiber content) of the laminated plate, calculating the theoretical density of the laminated plate, and comparing the theoretical density with the measured value of the laminated plate, wherein the difference value of the theoretical density and the measured value is the porosity. For ease of operation and calculation, the densities of the resin and glass fibers are not measured each time during actual testing, but rather data provided by the manufacturers of the resin and glass fibers are used. However, due to the fluctuation of the density of the actual product, the calculated result is not consistent with the actual pore condition, and even the calculated result is negative.
Disclosure of Invention
The invention relates to a method for testing porosity of a glass fiber laminated plate, and aims to provide a method capable of directly observing porosity and calculating the porosity.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for detecting porosity of a glass fiber laminated plate comprises the following steps of cutting the glass fiber laminated plate into sample blocks, placing the cut glass fiber laminated plate sample blocks into an embedding cup main body, pouring resin liquid for embedding the sample blocks, taking out the resin blocks embedded with the glass fiber laminated plate sample blocks after resin is solidified, polishing the resin blocks, observing the cross section of the resin blocks under a metallographic microscope, taking a picture of the cross section, carrying out statistical analysis on the shot picture, dyeing the pores contained in the reference surface, and calculating the percentage of the area of the pores to the area of the reference surface, namely the porosity result of the glass fiber laminated plate sample blocks.
According to a further technical scheme, the sample block of the glass fiber laminated plate is 25mm long and 10mm wide.
In a further technical scheme, the resin block is polished by 400 meshes, 800 meshes, 1200 meshes, 2500 meshes and 4000 meshes, is polished by 3 mu m and 0.03 mu m polishing solutions, and is observed under a metallographic microscope.
According to a further technical scheme, the cross section of the glass fiber laminated plate sample block is observed under the magnification of at least 25 times.
Compared with the prior art, the resin liquid adopts acrylic resin, epoxy resin and unsaturated polyester resin or resin liquid with the same effect, the invention has the following beneficial effects:
the invention relates to a method for testing porosity of a glass fiber laminated plate, which can directly observe the porosity in the glass fiber laminated plate through tests, is intuitive and accurate, avoids deviation caused by a theoretical calculation method, and can intuitively reflect the porosity condition in a sample block. Meanwhile, under the condition that the conditions of the test equipment allow, resin inlaying, grinding and polishing can be simultaneously carried out on a plurality of sample blocks, and the method is a method capable of quickly and effectively measuring the porosity.
Drawings
FIG. 1 is a schematic cross-sectional view of a glass fiber laminate sample block according to a method for testing porosity of a glass fiber laminate according to the present invention;
FIG. 2 is a schematic view of a main body of an embedded cup for a porosity testing method of a glass fiber laminate according to the present invention.
In the figure: 1 glass fiber laminated plate sample block, 2 resin, 3 pores, 4 embedded cup bases and 5 embedded cup bodies.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The invention relates to a method for testing porosity of a glass fiber laminated plate, and aims to provide a method capable of directly observing porosity and calculating the porosity. As shown in fig. 1, including a glass fiber laminate sample block 1 for porosity testing; resin 2 (including acrylic resin, epoxy resin, unsaturated polyester resin, etc.) of the mosaic block; pores 3 observed in the glass fiber laminate-like block 1. As shown in the attached figure 2, the cup comprises an embedded cup base 4 and an embedded cup body 5, wherein the embedded cup base 4 and the embedded cup body 5 are assembled to form an embedded cup which is used as a mold for embedding a sample block and can be repeatedly used.
The specific test method is as follows: the glass fiber laminate to be tested for porosity is first cut into a sample block 1 of glass fiber laminate having a length of about 25mm and a width of about 10 mm. The glass fiber laminated plate sample block 1 is placed in the embedding cup main body 5, resin 2 (comprising acrylic resin, epoxy resin, unsaturated polyester resin and the like) liquid for embedding the sample block is poured, and after the resin 2 is solidified, the resin block embedded with the glass fiber laminated plate sample block 1 shown in figure 1 is taken out. The resin block is polished by 400 meshes, 800 meshes, 1200 meshes, 2500 meshes and 4000 meshes, polished by 3 mu m and 0.03 mu m polishing liquid and then observed under a metallographic microscope. A cross section of the glass fiber laminate sample block 1 was observed at a magnification of at least 25 times as shown in fig. 1, and the cross section was photographed. Statistical analysis of the photographs taken: an area is selected as a reference surface (such as a rectangle with the size of 20mm x 4 mm), and the percentage of the area of the pores 3 in the reference surface is calculated by dyeing the pores 3 contained in the reference surface, which is the result of the porosity of the glass fiber laminated plate sample block 1.
The invention relates to a method for testing porosity of a glass fiber laminated plate, which can directly observe the porosity in the glass fiber laminated plate through tests, is intuitive and accurate, avoids deviation caused by a theoretical calculation method, and can intuitively reflect the porosity condition in a sample block. Meanwhile, under the condition that the conditions of the test equipment allow, resin inlaying, grinding and polishing can be simultaneously carried out on a plurality of sample blocks, and the method is a method capable of quickly and effectively measuring the porosity. The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A method for detecting porosity of a glass fiber laminated plate is characterized by comprising the following steps of cutting the glass fiber laminated plate into sample blocks, placing the cut glass fiber laminated plate sample blocks into an embedding cup body, pouring resin liquid for embedding the sample blocks, taking out the resin blocks embedded with the glass fiber laminated plate sample blocks after resin is solidified, polishing the resin blocks, observing the cross section of the resin blocks under a metallographic microscope, taking a picture of the cross section, carrying out statistical analysis on the shot picture, and calculating the percentage of the area of pores in the reference surface by dyeing the pores in the reference surface, namely the porosity result of the glass fiber laminated plate sample blocks.
2. The method of claim 1, wherein the glass fiber laminate sample has a size of 25mm long and 10mm wide.
3. The method for detecting the porosity of the glass fiber laminated plate according to claim 1, wherein the resin block is ground by 400 meshes, 800 meshes, 1200 meshes, 2500 meshes and 4000 meshes.
4. The method of claim 1, wherein the cross-section of the glass fiber laminate sample is observed at a magnification of at least 25 times.
5. The porosity detection method of the glass fiber laminated plate according to claim 1, wherein the resin liquid is one or more of acrylic resin, epoxy resin and unsaturated polyester resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911363394.6A CN111122409A (en) | 2019-12-26 | 2019-12-26 | Method for testing porosity of glass fiber laminated plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911363394.6A CN111122409A (en) | 2019-12-26 | 2019-12-26 | Method for testing porosity of glass fiber laminated plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111122409A true CN111122409A (en) | 2020-05-08 |
Family
ID=70502802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911363394.6A Withdrawn CN111122409A (en) | 2019-12-26 | 2019-12-26 | Method for testing porosity of glass fiber laminated plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111122409A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166719A (en) * | 2021-11-27 | 2022-03-11 | 北京擎科生物科技有限公司 | Method and device for screening nucleic acid synthetic vector |
-
2019
- 2019-12-26 CN CN201911363394.6A patent/CN111122409A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166719A (en) * | 2021-11-27 | 2022-03-11 | 北京擎科生物科技有限公司 | Method and device for screening nucleic acid synthetic vector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103439206B (en) | Micro-indentation-based method for testing residual stress of tiny area of tough block material | |
| CN108827855B (en) | Porous concrete pore structure parameter obtaining and analyzing method | |
| CN111624070B (en) | Test sample and method for measuring external friction angle of saturated soil and structure by utilizing triaxial apparatus | |
| CN111122409A (en) | Method for testing porosity of glass fiber laminated plate | |
| CN105181553A (en) | Carbon fiber composite material laminated board porosity nondestructive examination test specimen selection method | |
| CN106323834A (en) | Calibration method for carbon fiber composite porosity reference blocks | |
| CN103983492B (en) | A kind of jade Non-Destructive Testing instance model and preparation method thereof | |
| CN108592836A (en) | A kind of solid volume measuring device | |
| CN110595861A (en) | Method for detecting surface coating | |
| CN105699341A (en) | A fluorescence metallographic measuring method for pores of a metal material | |
| CN114414344B (en) | Method for testing performance of concrete structural surface in water environment | |
| CN104764427A (en) | Workpiece small part detecting method | |
| CN208396706U (en) | The long monitoring system of rock core seam | |
| US20130130393A1 (en) | Method of analyzing a plurality of ferromagnetic particles | |
| CN110501183B (en) | Ceramic electronic component metallographic section and preparation method thereof | |
| CN112067466A (en) | In-situ analysis device and method for in-plane shear matrix cracks of ceramic matrix composite | |
| CN203287231U (en) | Sample base for cold mounting and embedding | |
| JP2013088387A (en) | Sample preparation method and sample preparation device | |
| CN105651866B (en) | A kind of acoustic scan microscope inspection examining system separate type device positioning device | |
| CN115619848B (en) | Method for evaluating distribution characteristics of alkali silicate reactive minerals in aggregate | |
| CN110823791A (en) | In-situ observation method for erosion of cement paste solution | |
| CN103615986B (en) | Layer goes method to obtain the measuring method of leather sample cross section sequence of pictures interlamellar spacing | |
| CN114858551B (en) | Method for monitoring deformation field at layered interface of layered sample | |
| CN114858076B (en) | Method for monitoring deformation field in sample | |
| CN219842428U (en) | Cement stability measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200508 |