Introduction of testing methods and testing instruments for aluminum-plastic composite panels for building curtain walls

Building curtain wall aluminum-plastic composite panel refers to the composite panel used for building curtain wall materials. It is a composite sheet with plastic as the core layer and aluminum sheets on both sides, and the surface of the product is covered with decorative and protective coating or film as the product. Decorative face. Nowadays, the quality requirements for new materials in the field of construction and decoration are becoming more and more strict, and manufacturers are constantly standardizing their quality control methods and means. GB / T17748-2008 "APCP curtain wall" APCP national standards on quality control indicators and detection methods specific provisions, labthink blue light ( Jinan Languang Electromechanical Technology Co., Ltd.   As an excellent provider of testing instruments and inspection services, the test items and methods specified in GB/T17748-2008 are introduced in conjunction with the corresponding testing instruments .

one,              Chromatic aberration detection

According to the standard requirements, the color difference detection uses a visual method, which is specified under natural light conditions that are not exposed to direct sunlight. However, because the lighting conditions are not specified, the judgment results are often different due to environmental differences. Labthink 's SBG-80 D65/A standard light source or SPS-80T dual-source color matching plate is specially designed for fine-grained color applications in industrial production. It provides a light source with a spectral power distribution similar to real daylight. The technical indicators can be used for color observation and comparison all day long to avoid the problem of determining the color difference caused by the different sightseeing photos.

two,              Aluminum thickness, composite adhesive film thickness and deviation detection

1,   Aluminum thickness test

According to the standard GB/T 17748-2008 , remove the aluminum material from the sample as a test piece, using zui small division value 0.001mm ( 1μm ) thickness gauge measures the thickness of aluminum. It is required to test four corners and more than five test points in the center part of each test piece . The small average and arithmetic mean of all measured values ​​are used as test results .

Labthink 's CHY-C2 or CHY-CA thickness gauges fully meet the standard aluminum thickness test indexing values ​​with an ultra-high precision of 0.1μm . Today, aluminum is expensive, and accurate testing of its thickness can reasonably control quality and reduce costs, so high-precision thickness gauges will become a good choice for aluminum thickness control.

2 , composite adhesive film (polymer film) thickness test

Composite adhesive film thickness test refers to GB/T 6672-2001 plastic film and sheet thickness measurement (mechanical measurement method) standard, CHY-C2 or CHY-CA thickness gauge is also suitable for composite bonding of aluminum-plastic composite panel production Measurement of film (polymer film) thickness and thickness deviation.

three,              Coating gloss deviation test

According to the GB 9754 standard, a 20 degree gloss meter is required to carry out the test work. Test the data in as many locations as possible to test the difference between the large value of zui and the small value of zui as the deviation of the gloss of the aluminum-plastic composite panel coating for building curtain wall. Labthink 's gloss meter is specially designed for rapid and accurate detection of flatness and gloss of coatings, paints and other products. The instrument provided is small and portable, with a graduation value of 0.1 gloss units, and the quality is stable and reliable.

Fourth, peel strength test
   
The peel strength of the aluminum-plastic composite panel for building curtain wall is very important. The composite strength between the aluminum panel and the plastic can meet the standard, which guarantees the durability and stability of the product in subsequent use. The test is as follows:

The aluminum material to be peeled off is peeled off at the two ends of the sample for a short period. One end of the aluminum material is peeled off, the back core material and the aluminum material are cut off, and the left aluminum material is clamped on the upper clamp plate and tested. The upper jaw of the machine is connected, and the aluminum material peeled off at the other end is clamped on the drum. Make the length axis of the test piece perpendicular to the central axis of the drum, zero the test machine load, and then connect the lower clamp to the lower clamp of the test machine (see attachment); set the test machine to 25mm Stretch at a speed of /min until the test piece is peeled off at least 150mm At the same time, the peel force and stroke curve were recorded. Although the standard specifies the preparation of the sample in the standard, it is inevitable to affect the front and back sections of the test piece during the sample preparation process. Therefore, in order to obtain the prepared data, the sample preparation (pre-stripping) process is reduced. The impact of the test results, the test machine should have the function of "head to tail". Labthink 's XLW intelligent electronic tensile testing machine is specially used for stripping strength testing of materials, high precision, powerful software, and test data processing function of “head to tail”, which is more suitable for peeling strength detection of aluminum-plastic composite board. Demand.

In addition, XLW intelligent electronic tensile testing machine can also take into account the 180 ° separation strength, roll peel strength, tensile strength and elongation at break of the composite film (polymer film) of aluminum-plastic composite board protective film and aluminum-plastic composite board production. Test.


5. Detection of tear strength of composite adhesive film (polymer film) for the production of aluminum-plastic composite panels

GB/T17748-2008 " Aluminum- plastic composite panel for building curtain wall" national standard, the tear strength test of polymer film is called right angle tear strength, because its implementation method is GB/T11999 "plastic and sheet tear resistance experiment method The Elemendorf Act, so it is more appropriate to call the Elemendorf method tear strength. The test can be carried out using the " SLY-S1 Tear Tester".

 

The above is a brief introduction to the testing methods and testing instruments for aluminum-plastic composite panels for building curtain walls. Through the summary of GB/T17748-2008 related testing methods, the main contents refer to GB/T 2790-1995 adhesive 180 ° peel strength test method. (Flexible materials for rigid materials), GB/T 6672-2001 Determination of thickness of plastic film and sheet (Mechanical measurement method), GB/T 11999-1989 Test method for tear resistance of plastics and sheets ( Elemendorf method), GB/T 13022-1991 plastic film tensile properties test methods and other related standards. If enterprises and institutions need to further understand the detection methods or testing instruments of various indicators, Jinan Languang is willing to provide more detailed information and testing equipment services.

Jinan Languang Electromechanical Technology Co., Ltd.
: Jinan Languang Market Department
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