Household vacuum packaging machine for composite film or foil bag sealing, compact, functional and practical, easy to operate, and is the most affordable type. Automatic small home vacuum packaging machine adopts microcomputer program control operating systems, mechatronics technologies, largely to meet the needs of daily life. For example, food preservation, preservation bedding. Especially for the preservation cotton fabric, after vacuuming significant savings in space, very popular with users. Vacuum, translated from the Latin term vacuo, its meaning is nothingness. In fact, the vacuum to be understood as compared with the thin gas space. Within the specified space, sub-atmospheric pressure gas state collectively referred to as a vacuum. Vacuum gas lean degree is called the degree of vacuum (degree ofvacuum), is usually represented by a pressure value. Therefore vacuum packaging is not actually full vacuum, the vacuum degree in the vacuum packaging technology packaged food container is typically in 600-1333Pa. So, in turn called vacuum packaging or vacuum packaging exhaust packaging. Vacuum packaging machine vacuum packaging technology originated in the 1940s. In 1950, polyester, polyethylene plastic film successfully used vacuum packaging, after vacuum packaging has been developing rapidly. China vacuum packaging technology in the early 1980s, developed, and filling the vacuum packaging technology in the early 1990s began to use a small amount, along with the promotion and development of small supermarket packaging, its scope more widely, Some will gradually replace the rigid packaging, the prospects are very promising. The beautiful, can intuitively to its true form. Vacuum packaging shape broken off, it is not easy to see the true form of packaging products, packaging grades are not high. 2, nitrogen vacuum packaging, internal and external pressure balance (-600 ~ -700mmHg) will not pass air bag packaging bag gradually penetrate pores and prevent fresh products premature corruption, deterioration. 3, vacuum packed nitrogen, the most suitable for fragile, extrusion packaging materials (such as flowers, chips, snack foods, etc.), vacuum packaging can not be achieved. 4, some of the moisture content of food or materials, in the vacuum packaging bag pressure due to the role of oil and water leaking food or materials, will affect the intrinsic quality and surface appearance of food or materials. 5, some fried foods or fruit and vegetable chips, nitrogen vacuum packaging, can effectively prevent food spoilage or extrusion, extended storage time