Compared with other pigments, pearlescent pigments have a unique soft pearl luster that has an incomparable effect. The special surface structure, high refractive index and good transparency enable it to create the same effect as pearl luster in transparent media.
Pearlescent pigments can be used in transparent and translucent plastic resins. The use of pearlescent pigments will bring a charming color visual effect. Generally, the better the transparency of the resin, the more fully it can show the unique luster and color effect of pearlescent pigments. For less transparent resins (PC/PVC, etc.), due to the processing characteristics of these resins, the pearlescent luster and hue can also be fully displayed.
Pearlescent pigments are widely used in cosmetic containers, various packaging, toys, decorative materials, various films and other plastic products.
Since pearlescent pigments have different characteristics from ordinary pigments in processing and use, the following conditions must be noted to obtain a good pearlescent effect: The transparency of the resin should be good; Use pigments with good transparency as much as possible to mix with pearlescent pigments; Minimize the damage to the pearlescent pigment during the processing process; The pearlescent pigment is fully dispersed; The amount of pearlescent pigment in plastic is generally 0.5%-1%
Blow molding is the use of air pressure to directly or indirectly manufacture hollow plastic products, such as soda bottles. Pearlescent powder is particularly suitable for extrusion blow molding, because the extrusion process can ensure that the flake particles of pearlescent powder are uniformly distributed on the plastic surface, fully showing the pearlescent effect. The double extrusion method is a solution that combines covering performance with pearlescent effect. The thin outer layer can reflect a very strong pearlescent feeling, and the opaque layer inside can achieve the desired covering effect.
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