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    Home > Coatings News > Paints and Coatings Market > Coating technology: Test Method for performance of architectural coatings

    Coating technology: Test Method for performance of architectural coatings

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tip: in the product standard of architectural coatings, the test contents of different types of coatings are different, but the test methods of some main technical properties are the same, as shown in the following table: Testing methods for main technical properties of building coatings No test method name corresponding standard instrument and equipment 1 state in container GB / T 67533-86 2 low temperature stability GB / T 9755-2001 low temperature box 3 drying time GB / T 1728-79 4 initial drying crack resistance GB / T 9779-2005 initial drying crack resistance 5 stain resistance GB / T Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Home of coatings: in the product standard of architectural coatings, the test contents of different types of coatings are different, but the test methods of some main technical properties are the same, as shown in the following table: test method number of main technical properties of architectural coatings test method name of corresponding standard instrument 1 state in container GB / t67533-86 2 low temperature stability GB / t9755-2001 low temperature box 3 Drying time GB / t1728-79 4 initial drying crack resistance GB / t9779-2005 initial drying crack resistance 5 stain resistance GB / t9780-2005 whiteness tester, water tank (volume 15L, 2m high) 6 scrub resistance GB / t9266-2009 scrub tester 7 alkali resistance GB / t9265-2009 glass flume 8 water resistance GB / t1733-93 glass flume 9 freeze-thaw resistance cycling JG / t25-1999 low temperature box and constant temperature box 10 bond strength GB / t9153-2009 tensile tester 11 artificial aging resistance GB / t1766-2008 artificial acceleration weathering resistance tester 12 impact resistance GB / t1865-1997 impact tester 13 fineness GB / t1732-93 scraper fineness meter 14 adhesion (circle method) adhesion (grid method) GB / t6753-2007 GB / t9286-98 adhesion tester cutting tool 15 flexibility GB / t1731-93 flexibility tester 16 heat and humidity resistant type GB / t1740-2007 temperature and humidity regulating box 17 viscosity GB / t9269-2009 stoker viscometer 18 coverage GB / t1726-79 black and white grid, dark box In the process of coating production and use, quality inspection is an indispensable and important link Through the performance inspection of the base material and color paste, the workshop production can be effectively controlled; through the factory inspection of the finished products, the developed products or designated production products can be identified to determine whether they meet the technical indicators or quality standards The test methods of common delivery inspection items for building interior and exterior wall coatings are introduced as follows: (1) test environment (GB / T 9278-2008 temperature and humidity of coating sample state adjustment and test) temperature: 23 ± 2 ℃ humidity: 50 ± 5% (2) sampling shall be conducted in accordance with gb3186-2006 regulations on sampling of coating products (3) Preparation of test sample plate (JG / T 21-1999) (4) open the container in the state of container and stir it with scraper or stirrer When it is easy to mix evenly after mixing, it can be rated as "no hard block after mixing, in a uniform state" (5) For construction, brush the sample on the smooth surface with a brush, the coating amount is about 100 μ m after the wet film is applied, so that the long side of the test plate is horizontal, and the short side is placed vertically at an angle of about 85 ° with the horizontal surface After 6 hours, brush the second layer of sample with the same method When the second layer is applied, the brush will operate without difficulty, so it can be judged as "brush the second layer without obstacle" (6) The sample plate after the construction test shall be placed for 24 hours for the appearance of the coating film If the coating film is visually observed, the brush mark is not obvious, there is no pinhole and sagging, and the coating is even If the color difference is not big compared with the agreed standard mouse color card, it is considered that "the appearance of the coating film is normal" (7) The drying time shall be in accordance with the provisions of gb1728 table drying method B if the coating surface feels a little sticky by touching with fingers, but there is no coating on fingers, it is considered that the surface is dry (8) Preparation of contrast coating: evenly apply the tested coating on the transparent polyester film or on the card paper of each background color according to the above template preparation method, and place it in the specified experimental environment for 24 hours The coating was placed in black and white environment for 24 hours If the polyester film is used as the base material to prepare the coating film, stick the coated polyester film on the black and white glass standard plate attached to the instrument with No 200 solvent oil dripping, keep it in optical contact, then measure the reflectivity of each coated polyester film at least four positions, and calculate the average reflectivity Rb (on the blackboard) and RW (on the white plate) If the film is made from card paper with black and white background, the reflectance shall be measured directly at least four positions on the black and white background film, and the average reflectance Rb (on the blackboard) and RW (on the whiteboard) shall be calculated respectively The comparison rate is calculated according to the following formula: the comparison rate = R B / R W the home of coatings is focused on the news and information of coatings, diatom mud, paint coatings, coating process, fire retardant coatings and coatings, diatom mud, paint coatings, coating process, decoration knowledge and decoration effect map of fire retardant coatings,
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