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What is luminous printing?

Update:14-12-2020
Summary:

Luminous printing is basically similar to ordinary fabr […]

Luminous printing is basically similar to ordinary fabric pigment printing. It uses light-storing materials and adds special adhesives and other additives to make a luminous printing paste to print flower patterns. After being irradiated by sunlight or other light sources, the luminous paste saves energy and changes from low-energy state. It jumps to the active state, and displays colorful patterns in the dark environment after nightfall, with special visual effects. Luminous printed fabrics are generally used in evening dresses, casual wear, children's clothing and interior decoration, etc., or used as clothing, shoes, hats and venue logos for special work occasions such as public security, transportation, urban construction, electricity, mining, fire safety, and stage performances. The application prospects in the toy field are particularly promising.

Luminous materials must be excited by light to emit light in the dark, so they are also called photoluminescent materials. This kind of substance has a certain time limit for its light emission after the external light source is removed, and the duration of light emission is called afterglow. Afterglow brightness is the value measured by D65 standard light source, 1000 1x excitation for 5min; afterglow time refers to the time required for the afterglow brightness to reach 0.32mcd/m2 (the weakest brightness that human eyes can see). The rare earth long-lasting luminous powder developed in China belongs to the alkaline earth aluminate type long afterglow luminescent material. It can absorb light for 5-20 minutes under sunlight or light, and then convert the absorbed light energy and store it in the crystal lattice. It can convert energy into light energy and emit light, and it can effectively continue to emit light (luminous brightness greater than 10mcd/m2) for 8-10 hours, and the luminous brightness decays to the lower limit of human observation (0.32mcd/m2) for more than 70h. Chemical Stable in nature, the process of absorbing, storing and emitting light can be repeated, and the service life can reach more than 20 years. This type of material is non-toxic, non-radioactive, and no harmful substances are produced in the production process of textile fabric manufacturers, so it becomes the first choice for luminous materials for luminous printing.

At the same time, luminous materials used for textile printing should solve two problems; one is the protection of luminous materials (photoluminescence or luminous powder); the other is the connection of luminous materials and fabrics. These two problems will directly affect the luminous life and fastness of patterns on the fabric. Therefore, attention should be paid to the selection of materials used in the preparation of luminous printing paste, and the preparation of the materials in accordance with the requirements of the Knitted Fabric and luminous printing paste. The high-quality luminous material has excellent weather resistance and light fastness, and the luminous effect remains unchanged when exposed to a humid environment or strong light; the made luminous printed fabric is exposed to the sun and rain continuously for 1 month outdoors, and has no effect on the luminous brightness. Great influence.

 

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