Are plastic plastic bags used to package food safety? How to recognise it?

In our daily life, when we buy food at roadside food stalls and at farmers' markets, many sellers often use plastic bags to package food. For example, buns, baked gluten, pancake fruit, vegetables, fruits, fresh food, and even freshly cooked beef noodles, spicy hot pot and so on can not be separated from plastic bags. For sellers, the use of plastic bags greatly reduces the cost of packaging. But with these plastic bags packaging food really safe?

Plastic bags in our daily life is divided into food bags and non-food bags, food-grade plastic is produced under purified conditions, the requirements of the plastic itself is non-toxic, common: PET, non-toxic PVC, food-grade PE, PP and so on. According to national standards, food-grade plastic bags shall not be detected plasticisers, vinyl chloride monomer, heavy metal lead content should not exceed 1 mg per kg. Plastic bags containing food is necessary to indicate the "food with" words, food safety mark QS and number.

Most of the vendors, food stalls and owners of plastic bags purchased, usually spend two or three dollars to be able to buy a pile, a pile of one hundred. And meet the requirements of packaging food, safety certification of the plastic bag price is often more than double, so many food stall owners in order to reduce their costs, the use of plastic packaging is mostly from the wholesale market to buy cheap goods.

These cheap plastic bags in the production of most of the old materials added to the processed, or even all made of old materials. These old materials are synthesised through the processing of recycled plastic products, and they are quite heterogeneous, and there may even be agricultural films, chemical drums, and even hospital waste.

This kind of plastic bags using old material does not belong to the food packaging bag, when it is in direct contact with food in the process, especially encountered in the heat, high oil, acidic food, will make the plastic bag in the vinyl chloride, phthalate esters, plasticisers, and other harmful objects precipitation, on the human body and health has a great harm. The following Liyuanda plastic bag factory for you to introduce how to distinguish between plastic bags.

Look at the appearance of plastic bags whether there is "food" logo. Usually this sign should be on the front of the bag, a more prominent position.

Smell the plastic bag has no odour, whether it makes people feel sick. Qualified plastic bags should be odourless, while substandard plastic bags due to the use of additives, with a variety of flavours.

Qualified plastic bags have a certain strength, not a tear on the break. The unqualified plastic bags due to the addition of impurities, often poor strength, easy to rupture.

Qualified plastic bags in the shake, will make a crisp sound, unqualified plastic bags are often "buzzing" muffled.

Touch the surface of the plastic bag, very smooth is non-toxic. If the colour is hazy, touch sticky, astringent, is toxic.

Combustion: the plastic bag cut off a corner, put on the fire, non-toxic burning that is burning, it will leave the fire still continue to burn, and yellow flames, and molten plastic like candles drop by drop down, emitting paraffin wax odour; poisonous, not easy to burn, burning green embers, and there is a choking odour.

In general, there are coloured plastic bags mostly used waste plastic recycled materials, can not be used for food. For example, most of the black plastic bags in the farmers' market is the use of waste packaging film, bags and other poor quality waste plastic processing, adding a large number of dark pigments to cover.

To see the plastic bag has no impurities. Placing the plastic bag in the sun or light, see if there is a black spot, there is no mouth. Plastic bags with impurities are definitely using waste plastics as raw materials.