What is polypropylene PP?

What is polypropylene PP?

Polypropylene (PP), also known as polypropylene, is a thermoplastic polymer. PP Polypropylene is generally strong and flexible, especially when copolymerized with ethylene.PP (Polypropylene) Semi-crystalline thermoplastic material.Polypropylene PP is a stable standard universal plastic. PP can provide excellent chemical resistance, high purity, low water absorption and good electrical insulation. Therefore, polypropylene PP can be used as an engineering plastic.Polypropylene PP is an economical material that can be made translucent when it is colorless, but PP is not as easy to make transparent as polystyrene, acrylic PP or other plastics.PP is usually opaque or colored with pigments.Polypropylene PP has good fatigue resistance!!

Polypropylene, PP is a semi-crystalline thermoplastic.PP has high impact resistance, strong mechanical properties, and resistance to various organic solvents and acid and alkali corrosion.It is widely used in the industry. The structure of polypropylene PP is close to that of polyethylene, so many properties are similar to polyethylene, especially the reaction and electrical properties in solution.Due to the existence of a methyl side chain in PP, PP can improve mechanical properties and heat resistance, but polypropylene PP is more likely to be oxidatively degraded under the action of ultraviolet rays and heat energy, and its chemical resistance is reduced

The hot-melt process of polypropylene can be realized by extrusion molding and injection molding.The most common forming technique is injection molding, which can be used to make cups, cutlery, vials, lids, containers, housewares, automotive parts, etc.Polypropylene is the modular belt material for most common conveying applications.

There are a wide range of applications in industry, including packaging materials and labels, textiles (for example, rope, thermal underwear and carpets), stationery, plastic parts and various types of reusable containers, thermoplastic polymer equipment used in laboratories, Speakers, auto parts, and polymer banknotes are among the most common polymer materials.In 2013, the global polypropylene market was about 55 million tons.British and Canadian plastic coins are also made of polypropylene

PP thermal properties

The melting point of polypropylene PP occurs within a range, therefore, the melting point of PP is determined by finding the highest temperature in a differential scanning calorimetry diagram.Perfect isotactic polypropylene PP has a melting point of 171 °C.Commercial grade polypropylene PP has a melting point ranging from 160 to 166°C, depending on the atactic material and crystallization.Syndiotactic polypropylene PP with a crystallinity of 30% has a melting point of 130°C.When the ambient temperature is below 0°C, polypropylene PP will become brittle

PP production and application

PP (Polypropylene) polypropylene:

• The melting point of PP is as high as 167°C, and it is heat-resistant. Its characteristics are that PP products can be sterilized by steam.

• PP bottle containers are most commonly used for soymilk and rice milk bottles, and PP is also used to hold 100% pure fruit juice, yogurt, fruit juice, milk...etc.

• Larger containers, such as buckets, trash cans, laundry tanks, baskets, baskets, etc., are mostly made of PP.

• In recent years, PP has also been widely used to make disposable tableware (for example, for catering companies to fill food, and containers for hand-operated beverage stores)

• The PP container is an opaque or translucent container. PP has the advantages of acid and alkali resistance, chemical resistance, impact resistance and high temperature resistance (about -20°C~120°C).

PP Polypropylene