Ultrasonic coupling agent and preparation method and application thereof

Abstract

The invention discloses an ultrasonic coupling agent and a preparation method and application thereof. The ultrasonic coupling agent is prepared from the following raw materials: a wetting agent, a lubricating agent and a gel matrix, and the lubricating agent contains glyceryl monostearate phthalate. The ultrasonic coupling agent is water-based gel, has moderate viscosity, good adhesion effect on engineering plastics, high signal-to-noise ratio and good sound transmission, and can improve the flaw detection depth; the ultrasonic coupling agent is smooth in texture and low in friction coefficient, and the workpiece and the probe are prevented from being scratched when sliding under pressure.

Description

technical field [0001] The invention belongs to the field of nondestructive testing, and in particular relates to an ultrasonic coupling agent and its preparation method and application. Background technique [0002] Engineering plastics are widely used in many fields because of their unique and excellent comprehensive properties. Engineering plastics are mainly produced by injection molding, extrusion, compression molding, etc. Many factors such as molding process, molding die, and melt flow characteristics often lead to porosity defects such as pores, bubbles, and cracks in the product or on the surface, which damages the material properties. Ultrasonic flaw detection is one of the important non-destructive testing methods to ensure the quality of industrial products. It has been very mature in metal materials and medical fields. With the development of special industries, ultrasonic flaw detection will be more and more widely used in engineering plastics. [0003] Compar...

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Problems solved by technology

Industrial couplants are mostly oil-based couplants, such as engine oil, grease, transformer oil, etc., which are difficult to clean during use, will pollute the surface of the workpiece, and affect the appearance of the product; medical couplants generally have a thinner solution and are coated on special engineering plastics The adhesion effect is not good. When sliding detection, there will be a gap between the working surface and the probe, which will affect the detection result, and the lubricity is poor, and the probe is easy to wear; when water is used as the couplant, due to the low viscosity of water, it cannot adhere to the surface of the workpiece , can only be operated by immersing both the probe and the workpiece in water, and the detection is often limited by the shape and size of the workpiece

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