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What is PP material

- Nov 28, 2017 -

What is PP material

PP plastic also known as Polypropylene, is a thermoplastic resin obtained by the polymerization of propylene.PP material has a lower heat distortion temperature (100 ℃), low transparency, low gloss, low rigidity, but have a stronger impact strength, PP impact strength increases with ethylene content increases. Vicat softening temperature of PP is 150 ℃. Due to the high degree of crystallinity, the material has very good surface stiffness and scratch resistance. PP does not exist environmental stress cracking problems.

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Non-toxic, tasteless, low density, strength, stiffness, hardness, heat resistance are better than low-pressure polyethylene, can be used at about 100 ℃. Has good dielectric properties and high frequency insulation and is not affected by humidity, but brittle at low temperatures, not wear-resistant, easy to aging. Suitable for the production of general machinery parts, corrosion-resistant parts and insulation parts. Common acid, alkali and other organic solvents it almost does not work, can be used for utensils.


Polypropylene has many excellent features:

1, the relative density of small, only 0.89-0.91, is one of the lightest varieties of plastic.

2, good mechanical properties, in addition to impact resistance, the other mechanical properties are better than polyethylene, forming a good performance.

3, with high heat resistance, continuous use temperature up to 110-120 ℃.

4, good chemical properties, almost no water, and the vast majority of chemicals do not respond.

5, the texture is pure, non-toxic.

6, good electrical insulation.

7, the transparency of polypropylene products than high-density polyethylene products, good transparency.

It has many advantages but also disadvantages:

1, poor cold resistance, low temperature impact strength.

2, products in use susceptible to light, heat and oxygen and aging.

3, coloring is not good.

4, easy to burn.

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