Vacuum packaging of cosmetics does not mean sterility. […]
Vacuum packaging of cosmetics does not mean sterility. Cosmetics infected with special structures: capsules, flagella, and fimbriae are just like expired cosmetics. Not only can they not be cosmetic, but they can also cause various skin problems, such as acne. Vacuum packaging is just to evacuate the air in the cosmetics package to increase the shelf life of cosmetics, but in the process of making cosmetics, it is not a vacuum environment, and bacteria may enter the cosmetics. This requires the selection of products made by regular cosmetics companies. If the cosmetics turn yellow or smell, they are spoiled and can no longer be used.
In the process of using cosmetics, after use, the bottle cap should be closed in time and placed in vacuum packaging, and then vacuumed. This can greatly extend the shelf life of cosmetics, which can be extended by about one month compared to cosmetics without vacuum packaging.
Classification of injection molding color matching pigments for cosmetic packaging materials
Cosmetic packaging materials, general inner packaging materials, the main manufacturing process can be divided into: molding process, surface and graphic processing process, assembly process trilogy. Lipstick tubes have excellent gas barrier properties, which can effectively prevent the infiltration of oxygen and odor gas, and at the same time prevent the exudation of the fragrance and effective ingredients of the contents. Emulsion pump distributors are divided into two types: barbed type and screw type. From the functional point of view, they are divided into spray, foundation cream, emulsion pump, aerosol valve, and vacuum bottle. Cosmetic packaging glass bottles are mainly used in cosmetics: skin care products (creams, lotions), perfumes, essential oils, nail polishes, several categories have smaller capacities, and capacities greater than 200ml are rarely used in cosmetics. Plastics (structure: synthetic resins, plasticizers, stabilizers, colorants) are color-matched as colorants, which are mainly divided into pigments (pigments are colorants that are insoluble in common solvents, so it is necessary to use machinery Methods such as heating and mixing will disperse the pigment evenly in the plastic) and the dye.
1. Inorganic pigments: thermal stability (explanation: stable and stable; no changes), good stability (The stability of), very good weather resistance, excellent light stability, low price, excellent dispersion performance. For example: titanium (Ti) white powder, carbon (C) black, etc.
2. Organic pigments: high coloring power, bright color, complete chromatogram, small relative density, and small addition amount. The disadvantage is that its heat resistance, weather resistance and hiding power are not as good as inorganic pigments, the dispersion effect is poor, the transparency is poor compared to the dye, and the price is higher. Mainly used for PO
U, TPE and other crystalline materials and partially bright (in the bright color products that the dye brightness cannot reach
3. Dyes: Organic compounds that can be used in most solvents and dyed plastics (structure: synthetic resins, plasticizers, stabilizers, colorants). The advantages are small density, high coloring power, and good transparency. The disadvantage is that its general molecular structure is small, and it is easy to migrate when it is colored (crystalline material). The price is more expensive than inorganic, and some prices are close to the price of organic pigments.
4. (Muscovite) titanium pearlescent pigment is a mica wafer coated with titanium dioxide. According to the different hue, it can be divided into three types: silver-white pearlescent pigment, rainbow pearlescent pigment, and color pearlescent pigment.
In the application of cosmetic packaging materials, plastic color matching is one of the main coloring processes. Because of its cheap cost and convenient coloring method, it is very popular among market users. In packaging products, various caps, pump heads, bottles, lipstick tubes and other processes have applications.