How to choose glitter powder suitable for mixing with silicone?
Material and ingredients
Material type: Common materials for glitter powder include PET (polyethylene terephthalate), PVC (polyvinyl chloride), aluminum foil, etc. PET glitter powder has relatively good chemical stability and good temperature resistance. After mixing with silicone, it is not easy to deteriorate due to temperature changes and other factors during subsequent processing and use. It is one of the more suitable choices; while PVC glitter powder may release some harmful chemicals under high temperature and other environments, which is not suitable for mixing with silicone, especially in the field of silicone products with high safety requirements such as food contact and medical treatment. Aluminum foil glitter powder has good gloss and unique metallic texture, but its compatibility with silicone and whether it will oxidize during long-term use and other issues that affect appearance and performance should be considered.
Ingredient purity: Choose glitter powder with pure ingredients and few impurities. Too many impurities may affect the dispersion effect of glitter powder in silicone, resulting in agglomeration, which in turn affects the appearance and quality of silicone products. At the same time, pure ingredients also help to ensure its own stability and reduce the possibility of fading, discoloration and other problems during use.
Specifications and shapes
Size specifications: Glitter powder has different particle sizes to choose from, such as the common ones ranging from dozens of meshes to hundreds of meshes. If the surface of the silicone product to be made requires a delicate and smooth surface with a delicate decorative effect, then you can choose glitter powder with a smaller particle size (larger mesh); if you want to create a more obvious and flamboyant shiny effect, or use it for some silicone products that do not require so much appearance accuracy, such as silicone ornaments, you can choose glitter powder with a slightly larger particle size (smaller mesh). However, it should be noted that the larger the particle size, the more obvious the impact on the fluidity of the silicone, so the amount of addition should be more carefully controlled to avoid affecting the molding process.
Shape differences: Glitter powder usually has a variety of shapes such as round, square, and hexagonal. Generally speaking, round glitter powder is relatively easier to disperse evenly in silicone, and it is not easy for sharp corners to scratch the surface of silicone during use; while square, hexagonal and other angular shapes may have more unique visual effects, but during mixing and subsequent use, you should pay extra attention to their impact on the physical structure of silicone and whether it will cause problems such as surface unevenness.
Quality characteristics
Weather resistance: Good glitter powder needs to have strong weather resistance, that is, it can still maintain its original color and gloss under different environmental conditions, such as long-term exposure to sunlight, temperature and humidity changes, etc. You can check the product description or consult the supplier about its light resistance, heat resistance, humidity resistance and other related performance indicators, and give priority to those glitter powders that have been tested and verified and have good weather resistance, so as to ensure that the products made by mixing it with silicone have a stable and beautiful appearance during long-term use.
Adhesion and stability: Glitter powder should be able to maintain good adhesion in silicone and will not fall off easily. Some simple testing methods can be used to make a preliminary judgment, such as taking a small amount of glitter powder and mixing it with silicone to make a small sample. After being treated in a simulated use environment (such as wiping, friction, bending, etc.), observe whether the glitter powder falls off. Glitter powder with good stability can maintain a uniform distribution state in the silicone matrix for a long time, and will not appear agglomeration, stratification, etc. that affect the quality.
Safety and compliance
Compliance with relevant standards: The selected glitter powder must comply with the safety standards and environmental protection requirements of the country or region regarding decorative materials, chemical products, etc., especially when used in children's toys, household items and other silicone products that may be in close contact with people, it is necessary to ensure that it does not contain toxic heavy metals (such as lead, mercury, cadmium, etc.) and other harmful ingredients to avoid potential risks to human health. It is necessary to check the product's test report, certification certificate and other relevant information to verify its compliance.