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Three methods for identifying non-toxic and toxic plastic films

by:Kint      2020-01-21
How to distinguish non-toxic and toxic plastic films? The most commonly used identification methods include sensory examination and combustion method and water immersion method. Sensory examination: polyethylene and polypropylene are more transparent than polyvinyl chloride films, with a layer of waxy luster on the surface and a feeling of lubrication when touched by hands, while polyvinyl chloride is milky white, with poor transparency and sticky hand feeling, the color is dark and the feeling is not good. Combustion identification method: polyethylene, easy to ignite, the flame is divided into two colors, the top is yellow, the bottom flame is blue, waxy, smokeless, and can continue to burn without open flame; Polypropylene is different from polyethylene in that it has only a small amount of black smoke and a taste of oil. However, toxic polyvinyl chloride is difficult to ignite, and the flame is also divided into two colors. The upper part is yellow, and the lower part is green. The flame is splash-shaped, with white smoke and pungent and spicy taste. It will be extinguished immediately after leaving the open flame. Since the PVC film is toxic, it should not be burned in the kitchen to avoid air pollution. Water immersion identification method: This method is simple and practical. Dip the plastic bag into the water, press it into the water by hand, and let go of G, such as sinking in the water, is generally toxic and can float on the water, generally non-toxic. Jia Feixiang Adhesive Products Co. , Ltd (0411-39911323) , The Northeast region really does not residue adhesive tape master roll manufacturer (Hot Melt Adhesive tape)! Mainly produces all kinds of tape master, semi-finished tape, foam tape master, masking tape master, cloth tape, paper-based tape. With dozens of patented formulas, it fills the gap in such products in China!
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