Views:216 Author:Site Editor Publish Time: 2020-04-16 Origin:Site
The indicator with luminous function is composed of upper and lower protective layers and self-luminous layers. The upper layer is made of transparent material. The self-luminous layer is made of a variety of ion-activated silicate, aluminate, sulfide self-luminous materials and resins. In addition to the upper transparent material, the lower layer can also use opaque materials such as leather, paper, fabric, wood and metal plates. This kind of indicator has excellent abrasion resistance, corrosion resistance, and water resistance. In the dark after light, the self-luminous function of the light-emitting layer plays a role of displaying. It is suitable for various security fields, especially it is inlaid on the ground for safe passage signs.
It basically consists of an upper transparent protective layer, a light emitting layer and a lower protective layer.
The role of the transparent protective layer is to more effectively protect the luminous signs from being infringed. It can be flat glass or shaped glass. It can also be a transparent resin film, paint, or a composite thereof. The transparent resin is a resin such as plexiglass, PVC, PE, PP, PET, PC, SBS, ABS, PU, PS, melamine, and fluorocarbon. The light emitting layer is made of a self-luminous material and a resin, and its composition is a self-luminous materialand 5 to 80% resin. 20 to 95% of the resin is one or more mixtures of PVC, PE, PP, PET, PC and alkyd, acrylic, polyurethane, fluorocarbon, epoxy and the like. The photoluminescence material can be thallium or other ion-activated aluminates, sulfides and other commonly used light-emitting materials, especially a variety of ion-activated silicate, aluminate, sulfide light-emitting materials or their mixtures are more effective. The main chemical composition expressions are as followed. The chemical composition expressions of various ion-activated silicate self-luminous materials are αMO · βM'O · γ SiO2 · δ R: EuxLny. In theses, M is one or more elements in Sr, Ca, Ba, Zn. M 'is a combination of one or more elements in Mg, Cd, Be. R is a combination of one or two compounds in B2O3, P2O5. Ln is a combination of one or more elements of Nd, Dy, Ho, Tm, La, Pr, Tb, Ce, Er, Mn, Bi, Sn, Sb.
In addition to the transparent material of the upper protective layer, the lower protective layer can also use opaque glass such as resin film, paint, and leather, paper, fabric, wood, and metal materials. One or two or more of them can be bonded or composite materials. There may be an adhesive layer between the light-emitting layer and the upper and lower protective layers, and the adhesive may be adhered with adhesives such as organic glue, inorganic glue, and hot-melt glue. The light-emitting layer is a mixture of a light-emitting material and a resin or a composite of the light-emitting material on a resin film, board, leather, paper, fabric, wood, or metal plate. The service life of such protected signs is significantly higher than the existing unprotected signs. The experiment proves that the upper and lower protective layers made of glass have better effects. The best structure is that the front and back sides of the light emitting layer are coated with an adhesive layer, and then the flat glass is compositely bonded to the front and back sides of the light emitting layer. Due to the glass protective layer, it has excellent abrasion resistance, non-combustibility, corrosion resistance, and water resistance.