Plastic packaging is a common way of food preservation, suitable packaging can better protect the product, but also bring more sales opportunities. Since plastic packaging is in direct contact with food, the material of plastic is crucial, and non-toxic and clean is the basis. Considering practicality, most of the current food packaging is composed of multi-layer materials. Today, we analyze the common food packaging bag material and bag type.
1. Material
The main materials of food packaging bags are:
Polyethylene (PE) : polyethylene is a common food packaging material, with good flexibility, wear resistance and isolation properties, suitable for all kinds of food packaging.
Polypropylene (PP) : Polypropylene has high heat resistance, acid resistance and alkaline resistance, suitable for high temperature processing and microwave heating food packaging.
Nylon (PA) : Nylon has good wear resistance, high temperature resistance and chemical stability, suitable for high temperature heating or chemical properties of more active food packaging.
Polyester (PET) : Polyester has high strength, stiffness and transparency, which is suitable for the packaging of lightweight products such as beverages and cosmetics.
Polyvinylidene chloride (PVDC) : PVDC has excellent moisture-proof, oil-proof, anti-corrosion properties, suitable for meat, baked goods and other packaging.
Ethylene/vinyl alcohol copolymer (EVOH) : EVOH has good oxygen insulation and light shading properties, and is suitable for the packaging of high moisture content and easily oxidized food.
Second, a variety of film composite methods
BOPP/LLDPE: moisture resistance, cold resistance, low temperature heat sealing tension; Suitable for instant noodles, snacks, frozen snacks, powder products, etc.
BOPP/CPP: Good moisture and oil resistance, high transparency and good stiffness; Suitable for instant noodles, cookies, candy and other dry food, should not be packaged refrigerated food and high temperature sterilization.
BOPP/VMCPP: light, moisture, oil, oxygen, good sealing; Suitable for dry food, fried food.
BOPP/VMPET/LLDPE: moisture and oxygen insulation; Suitable for all kinds of snacks, tea, soup.
PET/CPP: moisture, oxygen, fragrance and high temperature resistance; Suitable for cooking food, alcoholic food, scented food.
PET/PET/CPP: moisture, high temperature resistance, easy sealing; Suitable for, soy sauce, liquid, shampoo.
PE/PP: good barrier properties, mechanical strength and flexibility, suitable for all kinds of food, medicine, cosmetics and other packaging fields.
PE/PA: with high strength, wear resistance and chemical stability, suitable for high temperature heating or chemical properties of more active food packaging.
PET/PE: with high strength, stiffness and transparency, it is suitable for the packaging of lightweight products such as beverages and cosmetics.
Three, common bag type
Three side seal: two side seams and a top seam pocket, the bottom edge is formed by folding the film horizontally. Three-sided sealing bag is widely used in food packaging, facial mask bag, tea bag, candy bag, powder bag, cosmetic bag, snack bag, medicine bag, pesticide bag and so on.
Back sealing bag: also known as the middle sealing bag, is a bag that is sealed on the back of the bag body. Its application range is very wide, general candy, bag instant noodles, bag dairy products, etc., are all in this form of packaging. In addition, the back sealing bag can also be used to store food, medicine, cosmetics, frozen food, philatelic products, etc., with moisture-proof, waterproof, insect-proof, prevent things from falling. Its light sealing performance is good, non-toxic and tasteless, good flexibility.
Four-side sealing bag: The four sealing edges are put together to seal the four edges, and the two sides and the bottom edge are sealed. In the cosmetics industry, four-sided sealing bags are widely used in the packaging of face creams, lotions, perfumes and other products.
Self-supporting bag: There is a horizontal support structure at the bottom, which does not rely on any support and can stand on its own whether the bag is opened or not. Self-standing bags are mainly used in fruit juice drinks, sports drinks, bottled drinking water, absorbable jelly, condiments and other products.
Suction mouth bag: is a new beverage, jelly bag, it is developed on the basis of self-standing bag. A suction nozzle is usually added to the bag for easy pouring and multiple use. Suction mouth bag is mainly used in liquid packaging, such as beverages, jelly, ketchup, salad dressing, shower gel, shampoo and so on.
Zipper bag: has excellent sealing performance and convenience, suitable for all kinds of food packaging, such as candy, biscuits and so on.
Good packaging materials can not only better protect the product, but also beautify the product, enhance consumer desire to buy, so customized packaging bags and the purchase of packaging equipment is equally important, according to their own needs, product characteristics, market positioning and other factors to choose the right material and bag type to meet the packaging needs of different fields.
