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The plastic steamer of the rice cooker has been used for a long time without poison. The plastic steamer of rice cooker is generally made of PP material, which is safe and harmless to human body. The scientific name of PP engineering plastics is polypropylene, which is another excellent resin variety developed after nylon. It is a linear polymer with high density, no side chain and high crystallinity, and has excellent comprehensive properties.

PP has good solvent resistance, oil resistance, weak acid resistance and weak alkali resistance. Polyoxymethylene has high hardness and rigidity, high creep resistance and stress relaxation resistance, excellent wear resistance and self-lubrication, and its fatigue property is incomparable to other engineering plastics, so it is non-toxic and can be used safely.