The difference between PA/PE vacuum bag and PET/PE vacuum bag

First of all, the PET polyester vacuum packaging bag is made of PET+PE, using PET as the raw material. PET/PE vacuum bags have low density, and (PET) polyester is the abbreviation of polyethylene terephthalate, commonly known as polyester. Polyester has high transparency and good gloss. It has an excellent gas barrier, oil barrier and fragrance retention properties. It is rigid and tough, and its tensile strength is 5 to 10 times that of PE and 3 times that of PA. Good chemical stability, resistance to dilute acid, alkali and common organic solvents. PET can maintain its excellent physical and mechanical properties in a wide temperature range. The thick sheet is made by the extrusion method, and then the vacuum bag material is biaxially stretched. It is a colorless, transparent and glossy vacuum bag with excellent mechanical properties, high rigidity, hardness and toughness, puncture resistance, friction resistance, high temperature and low-temperature resistance, chemical resistance, oil resistance, air tightness and fragrance retention. It is one of the commonly used barrier composite vacuum bag substrates. The general thickness is 12μm, which is often used as the outer layer material of retort packaging and has good printability. (recommended to use this bag when packing some softer or less heavy items)

We are looking at PA nylon vacuum packaging bags. PA nylon vacuum bags are relatively good vacuum packaging bags. The surface layer of PA is mainly processed into film products for food packaging. Through directional stretching or compounding with PE, etc., the shortcomings of easy water absorption and poor heat sealing can be improved. It is a very tough vacuum bag with good transparency, good gloss, high tensile strength and tensile strength, and heat resistance, cold resistance, oil resistance and organic solvent resistance, excellent abrasion resistance, puncture resistance, relatively soft, Excellent oxygen barrier, but poor water vapor barrier, high hygroscopicity, moisture permeability, poor heat sealing, suitable for packaging hard items, such as greasy food, meat products, fried food, vacuum-packed food, steamed food.

The nylon film used by vacuum packaging bag manufacturers has very good printing performance. It is a very tough film with good transparency and good gloss. The tensile strength of nylon film is 3 times that of polyethylene film, and it has excellent puncture resistance and abrasion resistance and is suitable for packaging rigid items. It also has good heat resistance, cold resistance and good oil resistance, without static electricity, but it is difficult to heat seal. Nylon films are often used in the packaging of greasy foods such as meat products, sausages, sausages, fried foods, etc.

In summary, the general PE+PET bag has better adhesion and transparency and is also the most commonly used material for bags. But the disadvantage of this vacuum bag is that it is relatively brittle. If some products have high requirements, vacuuming may cause air leakage; PA vacuum bags are much stronger than PE+PET, and the vacuuming is relatively stable. If many products need to be vacuumed for a long time, PA vacuum bags should be used. . Relatively speaking, PA or nylon is more expensive than PET, so PA vacuum bags are more expensive than PET vacuum bags. The specific product used depends on the product requirements to be loaded.