Differences of PE and PVC Stretch Film
There are two most common stretch film materials on the market: PE and PVC. Their production process and performance are totally different. Let me explain in detail the difference between PE stretch film and PVC stretch film:
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Density:
One of the most concise and clear way to judge their materials is to soak them in water. The density of PE stretch film is lower 0.91 than 1.0 of water, so it will float after being immersed in water. The density of PVC stretch film is greater 1.45 than 1.0 of water, so it will sink after being immersed in water.In terms of density, which is more economical, PE stretch film or PVC stretch film? For example, for the same thickness, the amount of PVC = about 1.5 times the amount of PE stretch film.
Environmental protection:
From the point of view of environmental protection, PE is polyethylene, which contains only two elements of hydrocarbon and hydrogen, hygienic and non-toxic. Therefore, PE stretch film is relatively environmentally friendly. However, PVC is polyvinyl chloride. Due to the presence of chlorine, it will decompose to generate hydrogen chloride above 100℃ or after a long time of sunshine, producing hydrogen chloride gas. This gas is dangerous to human health. For some countries with high export requirements, PE stretch film is a highly recognized packaging material, and its environmental performance is much higher than PVC stretch film.
Transmittance:
PE stretch film has good gloss, looks clear and bright, but slightly whitish because of plasticizers. PVC stretch film has poor transparency and light yellow colour. Food covered with it will look blurry. https://baijiahao.baidu.com/s?id=1799194322418232602
Strength:
In winter, the temperature will be low and make stretch film become hard and crisp. Because of the loss of toughness, brittle fracture occurs. Therefore, PE stretch film is suitable for large packaging and long distance transport goods. The transverse and longitudinal stretch rate of PE stretch film is larger than that of PVC stretch film, and most of the stretch film for machine use is made of PE. PVC stretch film is used in specific places, such as cables.
Inflammation Test:
The flame of PE stretch film is yellow, burns fast and has the smell of burning candles. As PVC stretch film contains chlorine, the flame is yellowish green after ignited by fire, without oil dripping phenomenon. It will be extinguished after leaving the fire source and has a strong pungent odour.
I believe you must have a preliminary understanding of PE stretch film and PVC stretch film after reading today’s article, and you must have a scale in your heart when identifying and selecting them. If you don’t want to take so much time and effort to choose, please recognize our factory(Guangzhou Wande Packaging Products Co., Ltd.) and buy from our shop. We specialize in producing and selling PE stretch film, not only the quality of our products is excellent, but also provide the best pre-sale and after-sale service. https://wandepackage.com/difference-betwe…pvc-stretch-film/
