What is a vacuum cosmetic bottles
Contents of the vacuum flask and air can be completely cut off, avoid the product due to exposure to air oxidation, bacteria, and with its high-tech concept promotion product. On the market of vacuum flask is made up of a cylinder into spheroid container plus a placed at the bottom of the piston. Its design principle is to use a contraction of the spring force, and do not let air into the bottle, create a vacuum, and the use of atmospheric pressure to push the bottom of the piston to move forward. But because of the spring force and the atmospheric pressure can't give enough power, so the piston can't and bottle wall joint is too tight, otherwise the piston will be caused by the rise of resistance to progress; On the other hand, if you want to get piston is easy going and easy leakage of material condition, therefore the vacuum bottle is very high to the requirement of manufacturers professional. Vacuum flask of latest trends, complied with skin care products can effectively protect the fresh quality products. , but due to the complexity of the vacuum flask structure, higher cost of vacuum bottle packaging the use of only a few categories of goods, cannot be carried out in the market, to meet the needs of different class cosmetics packaging. Manufacturer in take skin care cosmetics packaging protective and decorative, began to focus on developing functional skin care products packaging, make the product of 'fresh', 'natural', the concept of 'preservative-free' worthy of the name.