Sealing machines play an important role in the process of product packaging and preservation.

Over the past few decades, raw milk consumption has accounted for a large proportion of dairy products due to living standards and technological constraints. The packaging operation of raw milk is relatively simple. Freshly squeezed milk is first filtered and sterilized, then filled into glass bottles with metal caps tightly sealed at the mouth, or into plastic bottles. Some products are also packaged in polyethylene plastic film bags. Because raw milk is difficult to preserve and spoils easily, it circulates and is sold for no more than a day, most sold through market retail or home pre-orders. Nowadays, the equipment is advanced and the storage time is longer. For example, using can sealers and vacuum capping machines, the vacuum and release time can be greatly extended.
In recent years, with the development of science and technology, the types of dairy products have gradually increased, with a longer shelf life and easier to carry or drink, and are deeply loved by the public. There are many different types of dairy products, which vary in nature and composition, and therefore in packaging requirements. The equipment used also varies. Sealing machines are used in most cases. The purpose of vacuum capping machine for dairy product packaging is to select suitable packaging materials according to the requirements of different types of dairy products, extend the shelf life of dairy products, ensure the quality of dairy products, and facilitate storage, transportation and sales.