Negative pressure filling, also known as vacuum filling machine, refers to filling under lower pressure in bottles than atmospheric pressure. This kind filling machine has a simple structure and high efficiency. The vacuum method is suitable for filling higher viscosity liquid (such as oil, syrup, etc.), vitamin-containing liquid (such as vegetable juice, fruit juice, etc.) and toxic liquid (such as pesticides). This method can not only improve filling speed, but also reduce the contact and effect between liquid and residual air in the container. Therefore, it is beneficial to prolong the shelf life of some products. Here mainly introduces fruit juice drinks.
According to the material of the bottle, it can be divided into plastic bottle juice, glass bottle juice and canned juice.
