Polyethylene (PE) is a thermoplastic resin made by polymerizing ethylene. Polyethylene is odorless, non-toxic, feels like wax, has excellent low temperature resistance, good chemical stability, and can withstand the erosion of most acids and alkalis. It is insoluble in common solvents at room temperature, has low water absorption and excellent electrical insulation.
Polyvinyl chloride (PVC) is a thermoplastic resin polymerized by vinyl chloride under the action of an initiator. It has greater dispersibility, molecular weight increases with the decrease of polymerization temperature, has no fixed melting point, has good mechanical properties and excellent dielectric properties.
PE and PVC are very similar in performance, it is difficult to distinguish from the surface, only through some tips to distinguish.
The editor of Chuanshu Building Materials teaches you how to distinguish between PVC and PE.
- Touch method. It feels lubricating by hand. The surface is coated with a layer of wax. This is a non-toxic polyethylene (PE) film bag, while the polyvinyl chloride (PVC) film feels a little sticky.
- Dithering method. Shaking by hand, the sound is crisp, and the polyethylene film bag is easy to float. The low-pitched hand shake is a polyvinyl chloride (PVC) film bag.
- Combustion method. It is flammable in case of fire, the flame is yellow, there is paraffin oil dripping when burning, and there is gas when the candle is burning. It is a non-toxic polyethylene (PE) film bag. If it is not easy to burn, the flame will be extinguished when it is away from the flame. The flame is green, and it is a polyvinyl chloride (PVC) film bag.
- Water immersion method. After immersing the plastic bag in the water and pressing it into the water by hand, the surface of the water surface is polyethylene (PE), and the bottom surface is polyvinyl chloride (PVC).
It may not be easy for everyone to understand this way, so let me give a more visual example.
The common PVC gloves in life are made of PVC paste resin, plasticizer, stabilizer, viscosity reducer, PU, demineralized water as the main raw materials through special processes.
Disposable PVC gloves do not contain allergens; low dust emission and low ion content; have strong chemical resistance and resistance to certain pH; have strong tensile strength, puncture resistance, not easy to break; have good flexibility And touch, easy to wear and comfortable; with anti-static properties, can be used in a dust-free environment.
The disposable PE gloves are made of low (LDPE) and high (HDPE) density polyethylene materials and refined with other additives. It has high transparency; the opening of the glove is loose, it is convenient and comfortable to wear; the surface has unevenness or flatness, the color is bright, the thickness is uniform; the weight is light, the feel is good, the price is low, and it is non-toxic and harmless. It is a general and economic protection product.
Disposable PE gloves are mostly used for household cleaning, chemical inspection, mechanical gardening, food, sanitation and industrial and agricultural protection, hair coloring, nursing washing, eating (such as eating lobster, big bones), etc., wearing can avoid the inconvenience of washing hands.
Disposable PVC gloves are mostly used in housework, electronics, chemical industry, aquaculture, glass, food and other factory protection, hospitals, scientific research and other industries; and are widely used in the installation of semiconductors, precision electronic components and instruments and the operation of sticky metal utensils , High-tech product installation and commissioning, disc drives, composite materials, LCD display meters, circuit board production lines, optical products, laboratories, hospitals, beauty salons and other fields.
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