What Is Plastic Broom Filament And What Types Are Commonly Used?

1. What Is Plastic Broom Filament?

Plastic broom filament refers to the bristle-like strands on a plastic broom head. These filaments are typically made from synthetic polymers and are produced using a plastic extrusion machine. During production, the plastic material is melted at around 200°C, extruded through a mold or spinneret, and then shaped into thin, flexible filaments. These filaments form the sweeping part of the broom and determine its durability, stiffness, and cleaning performance.

2. Types of Plastic Broom Filament

The most common types of plastic broom filaments are PET broom filament and PP broom filament. Each material has unique characteristics suited for different cleaning applications.

(1) PET Broom Filament

PET (Polyethylene Terephthalate) is a high-strength engineering plastic with excellent durability and flexibility. It is widely used for industrial and household broom applications due to its mechanical and thermal properties.

Key Advantages of PET Broom Filament:

• High heat resistance: Among general-purpose thermoplastics, PET has one of the highest heat distortion and long-term service temperatures.

• Excellent dimensional stability: Reinforced PET can withstand solder bath immersion at 250°C for 10 seconds without significant deformation or discoloration.

• Outstanding mechanical strength: With a bending strength of 200 MPa and an elastic modulus of 4000 MPa, PET filaments exhibit superior creep resistance, fatigue resistance, and surface hardness—similar to thermosetting plastics.

• Cost-effective performance: Since ethylene glycol (used in PET production) is much cheaper than butylene glycol (used in PBT), PET resins and reinforced PET offer one of the best cost-to-performance ratios among engineering plastics.

Applications:

PET broom filaments are ideal for high-quality, heavy-duty brooms, offering durability, high stiffness, and excellent resilience.

(2) PP Broom Filament

PP (Polypropylene) is another widely used material for broom filaments. It is a semi-crystalline thermoplastic polymer, known for its lightweight and chemical resistance. PP broom filaments are typically produced using virgin or recycled PP pellets.

Key Features of PP Broom Filament:

• Lightweight and durable: PP is non-toxic, odorless, and has a higher melting point and rigidity than PE (Polyethylene).

• Good toughness and chemical resistance: Suitable for a variety of cleaning environments.

• Limitations: PP has lower dimensional accuracy, weaker rigidity, and poorer weather resistance compared to PET. It may experience post-shrinkage, aging, and brittleness over time.

• Recycled PP materials: Due to simple and mature processing technology, recycled PP granules are commonly used to produce PP broom filaments. Depending on quality, recycled PP pellets are priced between ¥3000–¥8000 per ton, making them a cost-effective option for mass production.

Applications:

PP broom filaments are ideal for everyday household brooms, offering a balance of flexibility, affordability, and adequate cleaning strength.

Summary

Plastic broom filaments are essential components that determine a broom’s performance, lifespan, and application scope.

• PET broom filaments offer superior strength, heat resistance, and longevity, suitable for premium or industrial brooms.

• PP broom filaments, especially those made from recycled PP, are economical and versatile, commonly used in household brooms.

Both materials are extruded using plastic filament extrusion machines, where precise control over temperature, screw speed, and cooling ensures uniform filament diameter and quality — key factors in producing durable, high-performance broom bristles.

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