Как производится полипропиленовое волокно?

Introduction

Polypropylene fiber (PP fiber) is a synthetic fiber made from polypropylene (PP) polymer using a special process. Known for its durability, lightweight nature, and resistance to moisture, polypropylene fiber has become a popular choice in various applications, from textiles to construction materials, especially in concrete, mortar, and other building mixes, to help reduce cracking and increase the strength of the materials. In this article, we’ll explore how polypropylene fiber is made and the different types available.

What is Polypropylene Fiber?

Polypropylene fiber is a synthetic fiber often added to concrete to improve its strength and durability. These thin, flexible, and incredibly strong fibers make them useful in many industries, including construction. When added to concrete, they act like tiny reinforcements, helping to hold the mixture together and improve its durability.

Unlike natural fibers, polypropylene fibers have high tensile strength, flexibility, and chemical resistance, making them reliable for strengthening concrete structures. They are lightweight, easy to mix, and help reduce cracking in concrete over time.

Polypropylene Fiber Production Process

The industrial production requires strict control of each step, and here’s a complete overview of the process:

1. Raw Material Preparation

The main raw material used to produce polypropylene fiber is polypropylene resin. This resin undergoes strict quality control to ensure its chemical composition and physical properties meet production requirements. High-purity polypropylene pellets, with a purity exceeding 99.9%, are selected to ensure the best quality fibers.

2. Mixing

The polypropylene resin is mixed with additives in specific proportions using a blending machine. This step ensures that the raw materials are uniformly combined, laying the foundation for consistent fiber performance.

3. Melt & Spinning

The blended material is fed into a hopper, where it is heated to a high temperature until it melts. The molten resin is then extruded through a spinneret (a device with tiny holes) to form continuous filaments. These filaments are cooled quickly in water to solidify and take shape.

4. Initial Stretching & Preheating

The cooled filaments are drawn into a stretching machine and passed through a heating chamber. This process prepares the fibers for further stretching, enhancing their plasticity and allowing for better structural and performance changes.

5. Stretching & Lubrication

Next, the fibers go into the stretching machine to make them longer. Hot rollers pull the fibers, making them stronger and more flexible. This step aligns the molecular structure, improving the fiber’s durability.

Our production line uses 10-set smart temperature-controlled rollers (much better than the usual 5-set rollers). By adjusting roller speed and temperature precisely, the fibers heat up more evenly. This special design helps the fibers stretch better, making them thinner (just 18µm vs. the usual 30-32µm) and reducing breaks.

Since polypropylene can create friction and static electricity, we add a special lubricant during stretching. This helps prevent static, keeps fibers from tangling, and improves their smoothness.

6. Post-Processing & Setting

After stretching, the fibers may undergo additional treatments such as texturing, embossing, or shaping, depending on the intended application. The fibers are then stabilized through controlled temperature and tension to prevent shrinkage or deformation.

7. Cutting, Weighing, & Packaging

Finally, the finished fibers are cut to standard lengths, weighed for consistency, and packaged for storage. This completes the production process.

From mixing raw materials to final packaging, every step in making polypropylene fibers is carefully designed and strictly controlled. Each part of the process works together smoothly to ensure the final product is strong, fine, and reliable—meeting high-quality standards for different market needs.

Our Product Advantages

1. Ultra-Fine Filaments – Our monofilament fibers measure just 18µm in diameter (compared to the industry standard 30-32µm).
2. Exceptional Strength – A 10-set roller stretching process delivers superior breaking strength.
3. Outstanding Uniformity – Precision blending and intelligent temperature control ensure consistent quality.
4. Imported Equipment – Specialized oiling treatment provides anti-static and anti-pilling properties.

From raw material selection to final product delivery, our fully automated production process and 200+ quality control checkpoints guarantee that every batch meets international top-tier standards, fulfilling the strict demands of high-end applications.