Introduction of common materials for vacuum packaging bags

Vacuum packaging bags in our daily use frequency is very high, a lot of families will use vacuum packaging bags to package food to achieve the purpose of extending the shelf life. The material of the vacuum bag directly affects its freshness performance, the next vacuum exhibition we will learn about the material and characteristics of vacuum packaging bag.

Commonly used food-grade vacuum packaging material material has the following categories:

　　1, polyester vacuum bags:

　　Polyester is a general term for polymers obtained by polyol and polyacid polycondensation. Mainly refers to polyethylene terephthalate (PET), polyester (PET) vacuum bag it is a colorless and transparent, shiny vacuum bag, is based on polyethylene terephthalate as raw material, using the extrusion method into a thick sheet, and then by the bi-directional stretch made of vacuum bag material. Excellent mechanical properties, high rigidity, hardness and toughness, puncture resistance, friction resistance, high and low temperature resistance, chemical resistance, oil resistance, airtightness and good flavor retention, is one of the commonly used permeability barrier composite vacuum bag substrate. Commonly used to do the outer layer of steaming packaging materials, pressure performance is better.

　　2, nylon vacuum bag:

　　Nylon (PA) vacuum bag is a very tough vacuum bag, good transparency, and has a good gloss, tensile strength, tensile strength is high, also has good heat resistance, cold resistance, oil resistance and resistance to organic solvents, abrasion resistance, puncture resistance is excellent, and more soft, oxygen barrier is excellent, suitable for packaging of hard goods, such as greasy food, meat products, fried food, vacuum-packed food, cooking food, etc..

　　Based on nylon vacuum bags can be derived from higher performance nylon composite bags and multi-layer co-extruded vacuum bags.

　　Nylon composite bags are mainly composed of PET/PE, PVC/PE, NY/PVDC, PE/PVDC, PP/PVDC, the main difference between the composite bag and the process generally consists of substrate, laminating adhesive, barrier materials, heat sealing materials, printing and protective coatings and other components.

　　Multi-layer co-extruded vacuum bag main component is nylon, made of PA, EVOH and PE, PP, TIE and other resins, using symmetrical or asymmetrical combination structure. As PA, EVOH joined, not only greatly improve the multi-layer film on the oxygen and taste barrier, composite peel strength, environmental resistance and fresh storage period. With no pollution, high barrier, strong function, low cost, small capacity ratio, high strength, flexible structure and so on, it makes the production process of food packaging materials to achieve pollution-free.

　　3, PE vacuum bag:

　　Polyethylene (polyethylene, short PE) is a thermoplastic resin produced by polymerization of ethylene. Transparent lower than nylon, hard feel, sound brittle, with excellent gas barrier, oil barrier and aroma retention properties. It is not suitable for high temperature and refrigerated use, and the price is cheaper than that of nylon. Generally used for ordinary vacuum bag material without special requirements.

　　4, aluminum foil vacuum bag:

　　Aluminum-plastic composite vacuum bag (PET/AL/PE or PET/NY/AL/PE or PET/NY/AL/CPP), the main component of aluminum foil, opaque, silver-white, with anti-gloss, with good barrier, heat sealing, spin-shielding, high temperature resistance, low temperature resistance, oil resistance, aroma retention; non-toxic and tasteless; softness and other features. Suitable for large precision machinery and equipment, chemical raw materials, pharmaceutical intermediates, moisture-proof, light, vacuum packaging. More than four-layer structure, with good water and oxygen barrier function. Aluminum foil vacuum bag is widely used in food, electronics, chemical and other industries, because the aluminum foil itself is more expensive raw materials, so the cost of vacuum will be higher.

　　The above is the vacuum show summarized on the vacuum packaging bags commonly used materials and features of the introduction, I believe that after reading a lot of friends in the choice of their own product packaging bags will have a general understanding of it, want to know more information, welcome to consult us.