Plastic bags is a kind of plastic as raw material for the production of the life of supplies bags, widely used in daily life and industrial production, but this time it convenient to bring lasting harm. Commonly used plastic bags, mostly made of polyethylene film, the film non-toxic, it can be used to hold food. There is also a film made of polyvinyl chloride, PVC itself is non-toxic, but according to the use of the additive added film is often harmful substances, has some toxicity. So this kind of film, and the film made from the plastic bags are not suitable for holding food.
Plastic bags according to the material can be divided into OPP, CPP, PP, PE, PVA, EVA, composite bags, co-extruded bags.
Clear boxes are often used in people's lives, but also when in use must be careful, some plastic bags are toxic and can not be used directly loaded food.
First, with the eye Act
Non-toxic plastic white, transparent or slightly transparent, uniform texture; toxic plastic bags, although compared with color or white, but transparency is poor, compared with muddy, uneven plastic surface tension, small particles.
Second, use your ears
When the hand shake hard plastic, issued by the crisp sound show is non-toxic plastic bags; and the sound is small and stuffy toxic plastic bags.
Third, touch
Stroking the surface of the plastic bags, very smooth is nontoxic; sticky, astringent, waxy feeling is toxic.
Fourth, with the smell
Non-toxic, odorless plastic bags; pungent odor or taste unusual is toxic.
V. submerged test method
The plastic bag into the water, according to the bottom by hand, wait a moment, surfaced is non-toxic plastic bags, submerged in the bottom of that is toxic plastic bags.
Sixth, combustion method
Flammable, non-toxic plastic, the flame tip yellow, cyan partial form, burning like a candle, like tears dripping paraffin smell; toxic plastic nonflammable, away from the fire is put out, the tip of the flame is yellow, or black the bottom is green, can soften the drawing, you can smell the pungent odor
For food packaging plastic bags there are strict regulations, ordinary plastic food bags, can not be used to hold the temperature at 50 degrees Celsius for more than food; maximum temperature can be achieved must be clearly marked on the food packaging. No domestic provisions in this regard, leading to some unqualified plastic bags great harm to health.
1, lunchtime, often seen portable plastic bags packaged food pedestrians. Most of these plastic bags are no QS certification, a considerable part is made of recycled plastic, such as medical waste, the dye may be added during production, some containing an organic dye, and many also contain aromatics.
2, some for health in order to avoid the spread of bacteria, but if it is unqualified plastic case of thermal decomposition, the resulting harm would be greater this approach is not feasible in fact, most health and safety of the method or do dishes disinfection, or bring their own utensils.
Related reading: printed plastic packaging clear plastic box
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