In modern life, plastic products are everywhere, among which PE (polyethylene) and PP (polypropylene) are the two most common plastic materials. They are widely used in our daily life, such as food packaging, household items, etc. However, many people are often confused when choosing and using plastic products, not knowing what the difference is between the two materials and how to choose and use them correctly. Today, we will delve into the basic characteristics, application scenarios and differences between PE and PP to help you improve your quality of life and also benefit professionals in related industries.
Let's look at the physical properties. PE material is a soft, transparent or translucent material, which is relatively smooth to the touch, has good tensile resistance, and is easy to bend and not easy to break. In contrast, PP material is harder, more transparent, and has stronger wear resistance. In terms of touch, PP has a rough feel and is slightly less elastic than PE.
Chemical stability is another important factor in the choice of plastics. PE material has good stability against most chemicals, but is relatively weak against oils and fats. PP is even better in this regard, as it is not only resistant to acids and alkalis, but also has a good resistance to many organic solvents, which makes PP an ideal material for chemical containers.
Heat resistance is also a key indicator to distinguish between the two. The heat resistance of PE material is average, and its long-term use temperature usually does not exceed 80 °C. The PP material has good heat resistance and can be used for a long time at a temperature of about 100°C, which is suitable for occasions that require high-temperature disinfection.
The difference in the scope of application is also significant. Because of its good flexibility, PE is often used in the production of plastic bags, plastic wrap, containers and other products. PP, on the other hand, is often used to make microwave food containers, baby bottles, and auto parts due to its high hardness and heat resistance.
With these differences in mind, we can make more accurate judgments when purchasing and using plastic products. For example, when we need a food container that can withstand high temperatures, it is obvious that PP material will be a better choice; And if we just need a bag to carry items temporarily, then a plastic bag made of PE material will be enough for the demand. By choosing the right materials, we not only avoid wasted resources, but also ensure health and safety.