Development History

Vacuum packaging technology originated in the 1940s. Since the successful application of plastic films to commodity packaging in the 1950s, vacuum packaging technology has developed rapidly. To a certain extent, the packaging level reflects the level of science and technology and wealth of a country. The research and application of vacuum packaging technology in my country is still in its infancy.

1. In 1962, Ordal proposed that the oxygen-impermeable membrane can inhibit the growth of pathogenic microorganisms, and packaging fresh meat can prolong its shelf life.

2. Baltzer believes that the reasons for the longer shelf life of vacuum-packed fresh meat than aerobic-packed fresh meat are:

(1) The total number of microorganisms increases slowly under anaerobic conditions;

(2) Decay and mucus reduction;

(3) After storage, the number of final microorganisms in vacuum packaging is less than that in aerobic packaging. This shows that the oxygen-impermeable film is vacuum-packed for fresh meat. When the oxygen in it is converted into carbon dioxide, the oxygen-impermeable film can block the outside oxygen from entering the package, so vacuum packaging can prolong the shelf life of fresh meat.

3. In 1970, Pierson et al. proposed vacuum packaging to create an "ecosystem" that selects the type and level of microorganisms. In 1974, SCOPA Company first applied MAP (Modified Atmosphere Package, which is a kind of vacuuming first, and then filling Packing of a certain proportion of mixed gas) to pack meat products.

Fourth, Pesis et al. (1986) proposed that vacuum packaging is the best preservation method to maintain the quality and hardness of persimmon fruit. It can be seen that the development and popularization of storage and preservation technology is increasingly valued by producers, operators and consumers.

Another part of the equipment required for vacuum packaging is the packaging container. There are many types of packaging containers, including composites composed of plastic, plastic and paper, aluminum foil and other composite materials, glass bottles, metal containers and hard plastics. The selection of packaging containers It should be determined according to the nature of vacuum-packed food. For canned food, glass bottles or metal cans should be used. For Chinese medicinal materials, aluminum foil or plastic should be used. Although there are many types of container materials for vacuum packaging, the most common is plastic film.

Advantage

High barrier: Co-extruded films with high barrier properties of different plastic materials can achieve high barrier effect on oxygen, water, carbon dioxide, odor, etc.

Stable performance: oil resistance, moisture resistance, low temperature freezing resistance, quality preservation, freshness preservation, odor preservation, can be used for vacuum packaging, aseptic packaging, inflatable packaging.

Low cost: Compared with glass packaging, aluminum foil packaging and other plastic packaging, to achieve the same barrier effect, co-extruded film has a greater cost advantage. Due to the simple process, the cost of the film products produced can be reduced by 10-20% compared with dry composite films and other composite films. 4. Flexible specifications: it can meet your different needs for different products.

High strength: The co-extruded film has the characteristics of stretching during the processing process. After the plastic is stretched, the strength can be increased accordingly. It is also possible to add nylon, polyethylene and other plastic materials in the middle to make it have a composite strength that exceeds the general plastic packaging. There is a phenomenon of delamination and peeling, good flexibility and excellent heat sealing performance.

Small volume ratio: The co-extruded film can be vacuum shrink-packed, with a volume-to-volume ratio of nearly 100%, which is unmatched by glass, iron cans and paper packaging.

No pollution: no binder is added, no residual solvent pollution problem, green and environmental protection.

Moisture-proof + anti-static + explosion-proof + anti-corrosion + heat insulation + energy saving + single perspective + UV isolation + low cost + small capacity ratio + no pollution + high barrier effect.