Common cosmetic inner packaging materials
Common cosmetic inner packaging materials include plastic bottles, glass bottles, hoses, etc. inner packaging materials of different materials have different characteristics and are suitable for cosmetics with different textures and components.
Plastic bottles plastic bottles are made of a variety of materials, including ABS (acrylonitrile butadiene styrene), PP (polypropylene), PE (polyethylene), pet (polyethylene terephthalate), as (styrene acrylonitrile copolymer), acrylic, etc. Among them, PP, PE and pet are environmental protection materials, which can directly contact with the contents; PP and PE are translucent, white in nature, and can be made into a variety of hardness; Pet is transparent, light and soft.
Glass bottle glass bottles are mainly used in cosmetics, such as cream, paste, lotion, essence, essential oil and other smaller products. According to the type of bottle mouth, glass bottles can be divided into wide mouth bottles and narrow mouth bottles. Wide mouthed bottles are widely used in solid cream cosmetics such as face cream and smear mask. Narrow mouthed bottles are commonly used in water and emulsion cosmetics.
Glass bottles are generally used with bottle caps, pump heads, or droppers to better ensure the cleanliness of products. The glass bottle body can be frosted, sprayed or silk screen printed.
The advantage of glass bottle is low cost, but the disadvantage is heavy and easy to break. Glass bottles are often used in perfume products to prevent liquid volatilization and keep the fragrance of perfume.
Plastic hose can be divided into single layer, double layer and five layers according to the number of layers; According to the material, it can be divided into plastic pipe and metal pipe. The most common is plastic hose, that is, the packaging of ordinary facial cleanser, which generally uses PE plastic.
The hose package has good tightness, which can isolate the external air and prevent the leakage of contents. The impermeability of hoses with different layers is different. The hose is generally equipped with rotary cover or flip cover, and the pipe body can be processed by silk screen printing and other processes.
Special ingredients need special packaging
Some cosmetics need special packaging to ensure the activity of ingredients due to the particularity of ingredients. Dark glass bottle, vacuum pump, metal hose and ampoule are common special packaging.
After the photosensitive components in dark glass bottle cosmetics are oxidized by ultraviolet radiation, they may not only lose activity and efficacy, but also produce sensitization and toxicity. For example, ascorbic acid and ferulic acid are easy to photolysis and oxidation, and retinol and its derivatives, furan coumarin have photosensitivity and phototoxicity. In order to prevent such components from being photodegradated and oxidized by ultraviolet light, the packaging must be protected from light. Generally, dark opaque glass bottles are used as packaging materials, and dark brown glass bottles are the most common. In order to ensure convenient use and product hygiene, dark glass bottles are often used with droppers.
Cosmetics brands that focus on functional ingredients often use dark glass bottles to ensure that raw materials play a role.
It should be noted that although dark glass bottles are used to avoid light, it does not rule out the use of dark glass bottles purely for traditional or appearance reasons. Some cosmetic ingredients do not contain photosensitive ingredients, but the brand side will also adopt the above packaging in order to attract consumers, considering the traditional use of dark glass bottles and droppers in drugs.
Although the dark glass bottle of vacuum pump has good shading, it can only be completely isolated from the air before use. It is not suitable for components with higher requirements for air isolation (such as ubiquinone and ascorbic acid for oxidation resistance) and easily oxidized oil components (such as shea butter).
If the product composition has higher requirements for the tightness of the package, a vacuum pump can be used. The vacuum pump is generally made of as material, and its remarkable advantage is that it can well isolate the contents from the outside air. There is a piston at the bottom of the bottle of the vacuum pump. When the pump head is pressed, the piston at the bottom of the bottle moves upward, the content flows out, the space of the bottle body is reduced, and the air will not enter.
Because the vacuum pump is made of plastic, the light shielding property of the metal hose is poor. If the product composition has high requirements for light shielding and air isolation (such as vitamin A alcohols), the metal hose needs to be used. High concentration retinol products are usually stored in aluminum tubes. Compared with plastic materials, aluminum tubes have stronger tightness, can block light and moisture, and can better protect the activity of contents.
Ampoules are one of the popular inner packaging materials in the cosmetics industry in recent years, and their tightness and safety are commendable. The idea of ampoules in the cosmetics industry comes from ampoules in the medical industry. Ampoules can store the active ingredients tightly and are disposable. They can isolate air and pollutants and ensure product hygiene. In addition, the glass ampoule can be made into dark color, so that it has a good light shielding effect. The products with aseptic filling and disposable ampoules can not add preservatives, which provides a new choice for consumers with severely sensitive skin or unwilling to use products containing preservatives.
Store cosmetics according to ingredient requirements
Although the inner packaging materials can help maintain the stability of cosmetics and the activity of functional ingredients, after purchasing the product, consumers need to store it according to the instructions in order to further extend the service life of the product. Cosmetics with special needs, such as avoiding direct sunlight and putting them in a dry place, will be marked on the outer package.
Many active ingredients in cosmetics are unstable, and the properties of products are easy to change under high or low temperature conditions. Such as vitamin A, polypeptides, enzymes and other active substances may change color and fail at high temperature, which is suitable for low-temperature storage. However, the instability of the active ingredient does not mean that the product is unstable. Before the product is produced, the formulator has taken various situations into account to ensure the stability of the product through formula, packaging materials, etc. Therefore, it may be counterproductive to treat the ingredients in isolation without considering the overall formula and claim to refrigerate or heat the product.
If the room temperature is too low, some aqueous or pure oil cosmetics may be frozen or crystallized. If the emulsifier content in the formula is very low, delamination will occur at low temperature. In this case, the product can be properly heated or stored at a suitable temperature.
Whether the packaging materials are hygienic and whether there are defects in appearance can be checked with the naked eye, but the air tightness, capacity, pumping times, printing adhesion, leakage and drop need to be tested and a test report issued.
If the package is tested, exquisite and beautiful, everything will be fine? No, national regulations also have requirements for packaging.
Just this year, the State Administration of market supervision revised and issued the national mandatory standard of restricting excessive packaging of commodities and requiring food and cosmetics, and excessive packaging will be subject to more severe punishment. Chanel, Gucci, Guerlain and Dior have all been notified or even punished for excessive packaging.
Excessive packaging means that the packaging void ratio, number of packaging layers and packaging cost exceed the standard. Generally, the outer packaging shall not exceed 3 layers, the void ratio of 50ml cosmetics packaging shall not exceed 30%, and the packaging cost shall not exceed 20% of the product sales price. Specifically, the network tool can be used to calculate the void ratio of cosmetics packaging.
If you don't rely on the power of the cosmetics processing plant and face all kinds of cosmetics packaging materials alone, I'm afraid you will be annoyed by repeated inspection and return and defective rate. As the first line of defense for product inspection, the agent processing plant has corresponding test reports for each packaging material, strictly controls the defect rate, and will "only make high-quality products" and implement quality work with high standards and strict requirements from inside to outside.
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