Which is better, polypropylene or polyethylene?

There is no difference between good and bad materials, only in which respect can we say which is more suitable. The temperature resistance and hardness of polypropylene are higher than those of polyethylene. Details are as follows:

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1. General performance: PE resin is odorless, nontoxic, white, powdery or granular, with a waxy appearance and a water absorption of less than 0. 0 1%。 PE is easy to burn, and its oxygen index is only 17.4.

2. Mechanical properties: PE has average mechanical properties, low tensile strength and poor creep resistance, but good impact resistance.

3. Thermal performance: PE has poor heat resistance, which changes with the increase of molecular weight and crystallinity. The low temperature resistance of PE is good, the brittleness temperature can reach above -50℃, and it can reach-140℃ with the increase of molecular weight.

4. Electrical properties: PE is nonpolar, so its electrical properties are excellent. The dielectric loss is very low, and it can be used for high frequency insulation.

Polypropylene is a high molecular weight polymer. Polypropylene PP has good heat resistance, and the most special mechanical property of polypropylene is bending fatigue resistance. Excellent corrosion resistance and oxidation resistance are slightly worse than those of polyethylene. Polypropylene is transparent in surface luster, good in mechanical strength, odorless, tasteless and non-toxic, which meets the national hygiene standards.

Product use: Polypropylene PP is not only used in machinery industry, but also widely used in counters, countertops and equipment linings in food, beverage, restaurants and hotels.