The material of food vacuum bag how to identify?

by:Kolysen     2020-07-23
Vacuum packing bag by using the principle of oxygen can effectively prevent food spoilage, maintain its color, aroma, taste and nutritional value. Widely used in the food industry. The security of food vacuum packaging, directly affects the safety of food. Manufacturers in vacuum packaging of food packaging bags, choose good packaging material is the key to ensure the food safety or not. So, the safety of the food vacuum packaging material how to identify? In the identification of food vacuum packaging material from the following method to identify the vacuum bags commonly used material polyvinyl chloride (PVC) and polyethylene and polypropylene. 1 and half, non-toxic polyethylene plastic for the milky white, transparent body, touch with paraffin soapy, texture soft, can bend. Food packaging bags in water can float on the surface of the water, boiling water significantly soften. Meet the fire burn, burns drips wax, and smells burned wax. The flame is yellow, cutting-edge bottom in blue, smoke less. After leaving the fire continues to burn. 2, non-toxic polypropylene plastic as ivory, half transparent body, touch lubrication but no soapy, texture strong toughness, shaking sound is ringing. Aluminum foil bag in water can float on the surface of the water, boiling water softening is not significant. Meet the fire burn, burns drips wax, expansion, and the oil smell. The flame is yellow, cutting-edge bottom to blue, a small amount of black smoke. After leaving the fire continues to burn. 3, toxic PVC plastic transparency as polyethylene, touch feel sticky, aluminum foil bag of quality of a material soft elastic, encounter cold harden. In the water sink. Can soften not easy burning, burning, wire drawing, pungent and spicy. The flame is yellow, cutting-edge bottom for the green, smoke. After leaving the fire slowly dies.
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