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The Material Of The Food Bag

Food bags are a special bag for packaging food, and its material must be safe and harmless.

Food bags are mostly plastic products, plastic raw materials, only polyethylene, polypropylene is harmless, although PVC itself is also harmless, but after heating, often there will be harmful substances, to food caused unnecessary Pollution.

Some foods are not heated, but their own is hot, Food Bag if not cool when the food bag into the same, will produce harmful substances, people will also have adverse effects on health after eating. And hot food after loading this bag, the taste of food will change, will affect the taste of consumption.

Food bag materials are mainly PE polyethylene, PP polypropylene, PS polystyrene and so on. Food Bag Different materials have different characteristics, the use of food according to their own characteristics to choose.

(A) PE polyethylene: the main component is polyethylene resin, add a small amount of lubricant, engage in aging agents and other additives. Polyethylene is odorless, non-toxic, outside the milky white waxy solid. Production of the packaging surface gloss, transparency is not high. Good plasticity.

1. Barrier performance is good: the effective prevention of water, moisture immersion, Food Bag but the barrier air is not too good.

2. Chemical stability: room temperature, and acid, alkali can not react, but poor oil resistance.

3. Mechanical properties: tensile strength, tear strength and flexibility of good performance.

4. High temperature, low temperature: low temperature performance is good, Food Bag can be used for food refrigeration, but the high temperature performance is poor, not with frequent high temperature cooking.

5. Health safety: in line with food safety standards, direct contact with food.

(B) PP polypropylene: the main component is polypropylene resin, gloss, high transparency, heat sealing than PE, but better than other plastic materials.

1. Barrier performance is better than PE, strength, hardness, rigidity higher than PE;

2. Health safety is higher than PE

3. High temperature resistance, Food Bag can be 100 to 200 degrees Celsius temperature long-term use, but the low temperature performance than the PE, to -17 degrees Celsius performance brittle.

Polypropylene is mainly made of thin film material food packaging bag, water resistance, moisture resistance than PT is good, transparent material, tear resistance, but the printing is less than PT, low cost, can be used for candy, snack kink packaging. Can also be made of heat shrink film, for food heat shrink packaging, Food Bag such as food vacuum bags and other composite bags.

(C) PS polystyrene: the main component of the styrene monomer polymer. Material is transparent, good gloss.

1. Moisture resistance than PE, chemical stability in general, with high rigidity, but brittle.

2. Low temperature performance is good, but the high temperature performance is poor, not higher than 60 ~ 80 degrees Celsius.

3. Good safety factor.

Mainly made of food boxes, fruit plates, tableware, cold cups and so on.