Application of RFH UV laser source in COVID-19 antigen self-test products

Since February, the new crown epidemic has been on the rise, and the prevention and control situation is extremely complex and severe. In order to actively respond to the epidemic, many new crown antigen self-test products have been put into the front line of anti-epidemic, and residents' self-test applications can be implemented to quickly screen out symptomatic or asymptomatic people. It is understood that the new crown antigen self-test product has the advantages of simple sample collection, the results can be read within 15 minutes, and the test results can be identified with the naked eye. This move is convenient for local people with inconvenient sampling or limited medical conditions. , is a powerful supplement to nucleic acid detection and helps to improve the ability of "early detection".

The COVID-19 antigen self-testing product requires the "Medical Device Registration Certificate" issued by the State Food and Drug Administration before it goes on the market. It belongs to the third category of medical devices. Therefore, the product identification (DI), production identification (PI) and other medical products are often marked on the surface of the supporting test card. Device identification information is used for product identification code, which usually consists of variable codes or customized codes such as QR, DM, CODE46 and CODE16K.

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At the same time, in order to strengthen the traceability and management of products, and also to ensure the quality and safety of citizens using the self-testing products for the new coronavirus antigen, the requirements for the clarity and identification of these labels are very high.

At present, the product identification codes of some medical devices are often printed with ink. The main problems are: the ink has a certain degree of pollution, and the environmental protection is poor; high consumables lead to high costs; nozzles are easy to wear and block, and maintenance costs are high; , The effect of the coding is easy to fall off or be easily tampered with over time.

The laser marking method can solve the above problems well, especially for the new crown antigen self-test box made of plastic material, the RFH 355nm ultraviolet nanosecond laser has short wavelength, short pulse, excellent beam quality, high precision, With the advantages of high peak power and other advantages, it has excellent application characteristics in the marking application of materials such as plastics, which can significantly reduce the thermal effect and greatly improve the processing accuracy.

Laser marking refers to the use of high-energy-density laser beams to mark long-lasting marks on the surface of materials. The 355nm ultraviolet nanosecond laser achieves excellent marking effects. Reduce the mechanical deformation and thermal deformation of the material (cold light), the pulse width is less than 25ns, the energy action time is short, the thermal force is small, its beam quality is high (M2<1.2), and the focusing spot is very small, only a few centimeters. The wide detection kit can also be marked with information such as QR code, product identification and production identification.