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The Role of Polypropylene Wax in Enhancing the Properties of Extruded Products

by:Sainuo     2023-06-22

The Role of Polypropylene Wax in Enhancing the Properties of Extruded Products

Polypropylene wax is a type of synthetic wax composed of polypropylene polymer chains. The wax is widely used in various industries, especially in the production of extruded products. Polypropylene wax is added to the extrusion process as an additive to enhance a product's properties, such as improving the melt strength and reducing the surface friction. In this article, we will delve into the role of polypropylene wax in enhancing the properties of extruded products.

What is polypropylene wax?

Polypropylene wax, also known as PP wax, is a low-molecular-weight polypropylene that resembles a wax-like substance. The wax has a melting point ranging from 120°C to 160°C and is characterized by its excellent thermal stability, low viscosity, and high crystallinity. Polypropylene wax is odorless and has a white color; it is also soluble in alkanes, chlorinated hydrocarbons, and other solvents.

Applications of polypropylene wax

Polypropylene wax has a wide range of applications across various industries, such as:

- Printing Inks: Polypropylene wax is added as an additive to printing inks to increase the ink's gloss and reduce its tackiness. The wax prevents the ink from sticking to the printing press and improves its printability.

- Hot Melt Adhesives: Polypropylene wax is commonly used as a hot melt adhesive, where it is blended with other resins to improve the adhesive's tackiness and peel strength. The wax also enhances the adhesive's thermal stability and reduces its viscosity.

- Extruded Products: Polypropylene wax is an essential additive in the production of extruded products such as films, sheets, and fibers. The wax improves the products' physical properties, enhances their processing characteristics, and reduces the surface friction.

How does polypropylene wax enhance the properties of extruded products?

Polypropylene wax plays a crucial role in enhancing the properties of extruded products. The following are the ways in which polypropylene wax enhances extruded products:

1. Improving Melt Strength

Melt strength refers to the degree of resistance that the plastic material exhibits when stretched during the extrusion process. Melt strength is an essential parameter in extrusion, and it determines the quality of the final product. Polypropylene wax improves the melt strength of extruded products by restricting the molecular motion of the polymer chains. The wax acts as a filler that reinforces the polypropylene polymer chains and prevents them from sliding past one another. As a result, the extruded products have improved strength and are more resistant to deformation.

2. Enhancing Processing Characteristics

Polypropylene wax is added to extruded products to improve their processing characteristics. The wax reduces the viscosity of the polymer melt, which enhances its flow properties, making it easier to process. The wax also reduces the processing temperature of the extruded product, which minimizes its energy consumption and enhances the product's dimensional stability.

3. Reducing Surface Friction

Surface friction is a common challenge in the extrusion process, where the polymer melt sticks to the processing equipment's surfaces, leading to product defects. Polypropylene wax is added to the processing equipment's surfaces to reduce surface friction, thus improving the product's surface quality. The wax acts as a lubricant that reduces friction, leading to smooth processing, and fewer product defects.

4. Enhancing the Adhesion Properties

Polypropylene wax is added to extruded products to enhance their adhesion properties. The wax improves the product's surface wettability, which enhances its adhesion to other substrates. The wax also acts as an anchor, improving the product's bonding strength and durability. The enhanced adhesion properties make the extruded product suitable for various applications, such as packaging and labeling.

5. Improving the UV Stability

Polypropylene wax is added to extruded products to improve their UV stability, especially in outdoor applications. The wax acts as a stabilizer that protects the product from the harmful effects of UV radiation. The wax absorbs the UV radiation and converts it into heat, which prevents the product from degrading and losing its mechanical properties.


Polypropylene wax plays a significant role in enhancing the properties of extruded products. The wax improves the melt strength, enhances the processing characteristics, reduces surface friction, enhances the adhesion properties, and improves the product's UV stability. As such, polypropylene wax is an essential additive in the extrusion process, and its use enhances the quality and durability of extruded products.

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