The UV aging test chamber is an aging test equipment that simulates light exposure, specifically simulating products placed outdoors for a long time. It only takes a few days or weeks for the sun's ultraviolet rays to cause damage, but the device can reproduce the damage that would take months or years outdoors. Check whether the product has fading, discoloration, decrease in brightness, powdering, cracking, blurring, embrittlement, decrease in strength and oxidation. It can also reproduce the damage caused by rain and dew.
It is an essential reliability test equipment for the paint/coating industry.
Q: What are the categories of coatings?
A: According to the form, it can be divided into solid paint and liquid paint; according to the use, it can be divided into industrial paint and civil paint. Industrial paint can be divided into color board paint, automobile paint, architectural paint, wood paint, aircraft skin paint, etc.; according to the effect, it can be divided into Anti-corrosion coating, anti-rust coating, waterproof coating, moisturizing coating, elastic coating, insulating coating, anti-fouling coating.
Q: What is the purpose of paint analysis and testing?
A: The performance of the coating determines the quality of the coating and the use of the coating, and the performance of the coating is multi-faceted. In order to evaluate the performance of coatings from different perspectives, many test methods have been developed, which mainly include two aspects: performance testing of the coating itself and coating film performance testing.
Q: What is the significance of coating performance testing?
A: The analysis and testing of coatings is an indispensable and important link in the production and use of coatings. It is the main basis for formulating technical indicators of coating products and is a specific method used to evaluate the performance and quality of coatings. 1) The test can provide data for the formula design and process conditions of the selected product; 2) By analyzing and testing the coating, the quality of the coating product can be correctly reflected and controlled; 3) The data obtained through the testing test can be used to carry out Research on basic theory to find out the relationship between components and performance, thereby discovering problems existing in original products and directions for improvement, providing a basis for the development of new products.
Q: What are the commonly used technical indicators for coating analysis and testing?
A: Indicators of the physical state of the coating include density, viscosity, etc.; indicators of the optical properties of the coating film include gloss, color, etc.; indicators of mechanical properties include hardness, flexibility, etc.; in addition, the weather resistance and resistance to chemical reagents of the coating Performance is also a very important technical indicator when measuring coating performance.
Q:What is pencil hardness?
A: The hardness of the coating film refers to the solidity of the coating film after drying, which is used to judge the degree of damage when it is subjected to external friction and collision. There are many methods for measuring coating film hardness, and the pencil hardness method is currently commonly used. The coating film hardness pencil measurement method is a measurement method that uses a pencil with a known hardness grade to scratch the coating film, and uses the pencil hardness grade to indicate the hardness of the coating film.
Q: What are the testing methods for coating film adhesion?
A: The adhesion of a coating film refers to its ability to firmly bond with the surface of the object being coated. Products with poor adhesion can easily peel off from the surface and lose their protective and decorative effects. The adhesion measurement methods include circle method, cross-hatch method, torsion method, scratch method, tape adhesion method and peeling test method. The cross-hatch method is a test method to evaluate the resistance of a coating to detach from a substrate when the coating penetrates into the substrate by cutting in a right-angle grid pattern. The adhesion measured by the pull-off strength method refers to applying a vertical and uniform pulling force on the bonding surface of the sample at a specified speed to determine the force required to break the adhesion between coatings or between a coating and the substrate.
Q: What are the methods for measuring coating film thickness?
A: The thickness of the coating film will affect various properties of the coating film. In particular, the physical and mechanical properties of the coating film are most obviously affected by the thickness. Therefore, when measuring the properties of the coating film, the test must be carried out within the specified thickness range. There are many ways to measure the thickness of a coating film. For example, the thickness of a coating film on a glass plate can be measured with a micrometer, the thickness of a coating film on a steel plate can be measured with a non-magnetic thickness gauge, and the thickness of a plastic coating can be measured with an ultrasonic method.
Q: What are the common coating testing standards?
A: Different countries have different testing standards and requirements. Common ones include ISO, ASTM, GB, JIS and other standards. For example, the common standards for hardness testing are: ASTM D3363, ISO 15184, GB/T 6739, JIS K5600-5-4; the common standards for thickness testing are: ASTM D7091, ASTM D1186, ISO 2808, ISO 2360; the common standards for impact resistance testing are The standards include: ASTM D2794, ISO 6272, GB/T 20624, JIS K5600.
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