With the development of the commodity economy, the marketability of the packaging itself is also growing significantly, which has become the special product no longer attached to the commodity production, and product all goods are inseparable from, and widely used. The development of wholesale packaging bags experienced four distinct phases: original packaging bags stage, the stage of large packaging bags, sachets packaging stage and gradually entering a new stage of the environmental (green) packaging bags.
Plastic bags have toxicity
However, though many farmers' markets, supermarkets are packing cooked food with plastic bags, in fact, a lot of plastic bags have toxicity, especially colorful plastic bags, they contain a lot of toxins. Because the colorful plastic bags are recycled plastic bags, the colorants they use usually contain benzopyrazole, which is a strong carcinogen, it may be transferred to the food in contact with food, make people chronic poisoning. In addition, the latest research shows that the plasticizer in plastic products is a carcinogen and the plasticizer of renewable plastic is easier oozing when in contact with food and especially oily food due to the shabby process and other reasons.
How to identify whether aluminum bags food packaging have toxicity or not?
Sensory detection: non-toxic plastic bags are milky white, translucent, or colorless, transparent, lubricated when touched by hands. The color of the toxic plastic bags is opacity or pale yellow, feel sticky.
Water detection method: Place plastic bag in the water, and press into the bottom, non-toxic plastic bags will emerge from the water, but toxic plastic bag sinks.
The jitter detection method: Grasp the plastic bag at one end and firmly shake, the packaging bag issue crisp sound is non-toxic, which is toxic if the sound is boring and astringent.
Burning detection method: non-toxic polyethylene plastic bags are flammable, flame is blue, dripping like candle tears when burning and have the paraffin flavor. Toxic PVC plastic bags are not flammable, put out after away from the fire, and issue pungent odor.
Food must be packed by PE film
Quality supervision department has asked the supermarket to use PE cling film to pack food, if there is any PVC cling film, they should be immediately withdrew. At the same time, the State General Administration of Quality Supervision, Inspection and Quarantine has issued requirements for non-corporate distribution PVC cling film containing DEHA (plasticizer). For public doubt about how to distinguish PVC cling film and PE cling film, the expert said that the two plastic wrap radiate is colorless and transparent. As the most direct identifying method, the public can identify through the plastic wrap packaging, the State General Administration of Quality Supervision, Inspection and Quarantine has asked food wrap producers to express on the product packaging.
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This article is come from:http://www.game-dice.net/selection-skills-for-food-packaging-bags/
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