[Chemical Knowledge]：What is PP material?

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PP material, also known as polypropylene material, is one of the most common plastic materials, because of its excellent performance and is widely used in many fields, such as automotive industry, medical equipment, electronic products, bottles and food packaging, home, toys and so on. In this article, we will delve into the basic concepts, features, uses and manufacturing process of PP materials. The basic concept of

1.

PP material is the full name of polypropylene, is a kind of polymer compound synthesized by polymerization of propylene monomer. As a plastic raw material, its chemical formula is [CH2-CH(CH3)]n, where n represents the degree of polymerization. Polypropylene is semi-crystalline and is a transparent, hard, lightweight, heat-resistant, chemical-resistant material that is easy to shape and process. Under certain conditions, it can be made into melt blow molding, injection molding, extrusion and other products of various shapes and sizes to meet various needs.

2. Features

1. Lightweight: PP material has a relatively low density, about 0.9g/cm³, which is lighter than water.

2. heat resistance: PP material heat resistance is better, can withstand high temperature to about 100 ℃ environment.

3. chemical corrosion resistance: PP material has good acid and alkali corrosion resistance, for most of the acid, alkali and salt has good corrosion resistance.

4. Easy processing: PP material has good processing performance, can be made by blow molding, injection molding, extrusion and other methods into a variety of complex shapes and sizes of products, products, smooth surface, clear color.

5. environmental protection: PP material can be recycled, and biodegradable, no negative impact on the environment.

3. uses

PP material has a wide range of applications, including but not limited to the following fields:

1. Automotive industry: manufacturing automotive interiors, dashboards, door panels, trunk panels and other parts.

2. Medical equipment: manufacturing medical syringes, infusion sets, masks, gloves, etc.

3. Electronic products: manufacturing batteries, cables, electrical housings, chargers, TV boxes, etc.

4. Bottles and food packaging: manufacturing all kinds of plastic bottles, lunch boxes, fresh-keeping bags, food packaging materials, etc.

5. Home, toys: manufacturing furniture, building materials, toys, etc.

4. Manufacturing Process The manufacturing process of

PP material includes the following steps:

1. Polymerization: propylene monomer is polymerized into a linear polymer in the presence of a catalyst.

2. Refining: The particles obtained by polymerization are cleaned and refined by mechanical grinding, extraction, washing, etc.