What Factors Affect Plastic Gloss?
1. Gloss requirements of plastics
Plastic is a kind of high-molecular polymer. It is composed of synthetic resin and additives such as fillers, plasticizers, stabilizers, lubricants, colorants and other additives. The surface gloss of different plastic materials will vary greatly. Gloss is a characteristic of the object surface. It mainly depends on the ability of the object surface to reflect light. Such as the ceiling lampshade and embossed lampshade used for lighting, the material's transparency and opalescent properties will affect the gloss of the material. The purpose of testing the gloss of plastic is to evaluate the quality of the product based on data inspection. The refractive index range of plastic is approximately 1.4 ~ 1.6 GU and the gloss is generally within the range of 70 ~ 110 GU.
2. What is gloss?
The surface gloss of plastic can be detected by professional gloss meters. It is recommended to use Linshang gloss meter LS192. The Linshang gloss meter can be used not only to measure the gloss of plastics but also to measure paper, stone, ink, etc. Gloss is a physical quantity that evaluates the ability of a material's surface to reflect light under a set of geometrically prescribed conditions.It has a reflective property of direction selection. Gloss refers to "specular gloss". Gloss is completely different from the concept of "finishness" or "roughness" in the machining industry, which is a continuation of the slight unevenness of the material surface.
3. Factors affecting the gloss of plastics
(1) The effect of raw materials on the surface gloss of products
The characteristics of the resin itself have a great influence on the product surface gloss, which is an effective method to control the gloss.
(2) Effect of processing technology on plastic surface gloss
For molded products, a surface-polished mold can be used, that is, the gloss of the mold can be improved to adjust the gloss.
(3) Effect of filler on plastic surface gloss
Inorganic filler filled plastic products can impart high rigidity, heat resistance and dimensional stability. Most inorganic fillers will seriously affect the high gloss of the surface of the clinker itself.
4. How to make plastic shiny?
The basic principle of plastic brightener is to form a thin film on the product surface, which greatly improves the smoothness and product surface gloss. Therefore, plastic brightener is generally not completely compatible with the resin. It can be released to the product during processing. Adding this product to polyethylene and polypropylene films, wires, cables, PP, PE, PA, PBT, PVC, ABS, AS, POM, EPE, EVA, etc., as well as engineering plastics and modified plastics, can reduce dynamic and static friction coefficient, improve processability (high fluidity, low energy consumption, elimination of air bubbles, etc.
If you want to know more about the gloss test of plastics, you can pay attention to the gloss meter which is produced by Shenzhen Linshang Technology.