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Why spiral hose guard use PP material?

PP (polypropylene) can be used as a material for spiral hose guard, so what are his main advantages?

PP (polypropylene) superior physical properties:
PP (polypropylene) is a non-toxic, odorless, odorless, creamy high-crystalline polymer with a density of only 0. 90--"0. 91g/cm3, is one of the lightest of all plastics. It is particularly stable for water, with a water absorption rate of only 0. 01%, the molecular weight is about 81.15 million. Good molding, but due to the large shrinkage rate (1% to 2.5%). Thick wall products easy to sink, for some of the higher dimensional accuracy of parts, it is difficult to meet the requirements, product surface gloss good.

PP (polypropylene) stable chemical properties:
PP (polypropylene) chemical stability is very good, in addition to sulfuric acid, strong nitric acid erosion, for all other chemical reagents are relatively stable, but low molecular weight of fatty hydrocarbons, aromatic hydrocarbons and chlorinated hydrocarbons can make polypropylene softening and expansion, while its chemical stability with the increase of crystallization has also improved, Therefore, polypropylene is suitable for the production of a variety of chemical pipes and accessories, corrosion prevention effect is good.

Why spiral hose guard use PP material?

Excellent properties of PP (polypropylene):
1. The relative density is small, only 0.89-0.91, which is one of the lightest varieties in plastics.
2. Good mechanical properties, in addition to impact resistance, other mechanical properties are better than polyethylene, molding processing performance is good.
3. It has high heat resistance and the continuous use temperature can reach 110-120 °C.
4. Good chemical properties, almost no water absorption, and does not react with most chemicals.
5. The texture is pure, non-toxic.
6. Electrical insulation is good.
7. The transparency of polypropylene products is better than that of high density polyethylene products, and so on.