Screen printing self-illumination marking system process
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The screen printing self-illuminating marking system is technically indistinguishable from other printing methods. There are very few companies specializing in the development of this product in China. Therefore, this article will give a brief description of the situation in production, and hope to benefit the screen printing enterprises who are interested in developing this product.
The logo production has corresponding national standards, which is no different from the ordinary light system logo. The difference is that the electroluminescent portion is changed to a self-luminous material. The company specializing in the development and market development of this product in Beijing, such as Yingguang Wannian Technology Co., Ltd., its logo system consists of more than 180 varieties, covering all parts of the fire and security fields for daily use; Dalian Luming As a leader in the production of luminescent materials in the world, there are more than 100 varieties of related products developed by pilot companies. In addition, there are more than 50 military self-illuminating signs of the Institute and the Institute of Marine Research, and the military logo may not be seen in public publications.
The above-mentioned companies have accumulated rich experience in the production, market development and application of self-luminous identification systems. First of all, in the choice of production sites, it is required to be clean, bright, dust-free and well ventilated.
The production equipment generally uses a semi-automatic screen printing machine, which is advantageous for uniform color printing over a large area. The use of hand-coated self-luminous materials makes it difficult to ensure uniformity of parameters such as brightness, uniformity of illumination, etc. Therefore, the use of manual screen printing self-illumination marking systems is not recommended.
The logo is divided into indoor type and outdoor type. The outdoor type of printing material should be able to withstand the temperature difference test and the direct irradiation of ultraviolet light; the indoor type generally uses solvent type ink. Many companies are also experimenting with UV retrofits, but some of the parameters of the product are difficult to guarantee for a long time. The substrate is generally selected from a PVC board containing a certain inorganic material, and the thickness is about 1 mm; the outdoor product is basically a steel aluminum plate, and both materials are non-flammable. To sum up, the process flow for identifying a product is roughly as follows.
Cutting→cleaning→printing white→printing safety color→printing white luminescent material→overprint varnish→detection→punching, trimming, adhesive, framed→overpack
The above process is not difficult for general screen printers to understand. Many signage companies have ready-made equipment. An umbrella color can refer to the latest standards of the national identification products, and then to the ink manufacturers to order or white line to prepare ink.
Screen printing self-luminous materials are the key process, and the product must ensure that the brightness, uniformity and length of illumination are in accordance with the quality requirements of the relevant products. The State General Administration of Fire has a special testing agency. Products must be sent to the statutory department for inspection before they can be sold in the market. Generally, they are sent once a year. As for the guarantee of the relevant parameters of the product, the self-test can also make the product quality reach the uniformity standard. Specific operation: You can make your own standard light box, built-in ordinary fluorescent tube, compare the qualified product and the test product in the same position of the light box, and you can know whether the product meets the requirements on the relevant parameters. In addition, there are professional measurements: luminosity foods. However, it is expensive, and manufacturers do not need to spend a lot of money to purchase. It is necessary to emphasize that the printed material from the luminescent material must be embossed in the second color after drying in one color. Generally, it is continuously imprinted 4-8 times according to the requirements. Nowadays, the second-generation luminescent materials are commonly used in products. The material diameter is not a single one, but an interval. Therefore, when selecting the screen, pay attention to the parameters of the luminescent material at the bottom of the manufacturer.
The purpose of the varnish is to prevent smudging and to have a certain beautification effect. Marking the same place in the aisle for a long time, it is inevitable that dust will fall on, and the varnish will make it easier to clean.
The service life of outdoor signs generally lasts for 5-7 years. This requires considerable attention in the selection of inks and substrates. The printing process is basically the same as that of indoor printing. The inks generally use two-liquid reactive inks and thermosetting inks. A clear, hard varnish is applied to enhance the durability of the fabric used in the product.
Since the electroluminescent portion is removed, the self-illuminating escape identification system is also much more flexible in its use. It can set a uniform width of the light strip at the height of the aisle baseboard, or it can be used to attach the product to the safe passage. On the floor tiles, the domestically produced professional film is generally used in China. The film is extremely wear-resistant and can be applied to the surface of the logo after being glued, and it is attached to the floor tile and sealed with a sealant to prevent water immersion.
In the case of heavy smoke, the escape personnel generally go forward, the electroluminescence time is shorter, and the photoluminescence time is longer, up to 8-12h. The disadvantage is that the illumination brightness is not high, but the product is high. Escape does not need such high brightness, as long as it can play the role of correctly guiding the route.