Classification and structure of vacuum bottles for cosmetic packaging

Many cosmetics on the market contain amino acids, proteins, vitamins and other substances, which are afraid of dust and bacteria and are easy to be polluted. Once polluted, it will not only lose its due effect, but also become harmful. The vacuum bottle can prevent the contents from contacting with the air, effectively reducing the deterioration and breeding of bacteria caused by contacting with the air. It also allows cosmetics manufacturers to reduce the use of preservatives and antibacterial agents, so that consumers can get higher protection.

Vacuum bottles are mainly divided into two types: ① By structure: ordinary vacuum bottles, single bottle composite vacuum bottles, double bottle composite vacuum bottles, and non piston vacuum bottles. ② According to shape, it can be divided into cylindrical and square, with cylindrical being the most common.

The vacuum bottle is usually cylindrical or oval, with a common specification of 10ml-100ml. The overall volume is small. It relies on the principle of atmospheric pressure to avoid pollution caused by cosmetics during use. The vacuum bottle can be used with anodized aluminum, plastic electroplating, spraying, and colored plastic for appearance treatment. The price is more expensive than other ordinary containers, and the minimum order quantity is not high.

The main accessories of vacuum bottle include: pump unit, cover, button, coat, screw thread, gasket, bottle body, big piston, bottom bracket, etc. The appearance components can be decorated, such as electroplating, anodizing, spraying and silk screen stamping, depending on the design requirements. The mold involved in the pump unit is relatively precise, and customers rarely open the mold themselves. The main accessories of the pump unit include: small piston, connecting rod, spring, body, valve, etc.

The full plastic self closing valve vacuum bottle is a bearing disc that can move up and down in the lower end of the vacuum bottle to hold skin care products. There is a round hole at the bottom of the vacuum bottle, air below the disc, and skin care products above. The skin care products are sucked out from the top by the pump, while the bearing disc keeps rising. When the skin care products are used up, the disc rises to the top of the bottle.