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Polypropylene Twisted Fiber

Polypropylene (PP) Twisted Fiber, also known as PP Bunchy Fiber, is a high-performance synthetic reinforcement fiber tailored for the construction industry. Crafted from polypropylene resin via melt spinning, drawing, and precision twisting processes, this fiber features a unique twisted structure that enhances its dispersion and grip in concrete matrices. As a cost-effective alternative to steel fiber, it significantly improves concrete’s mechanical properties while avoiding issues like corrosion and equipment wear, making it a reliable choice for modern construction projects.

What are the key features of PP twisted fiber?

-Strong alkali resistance, suitable for cementitious environments

-High tensile strength and elastic modulus for reliable reinforcement

-Lightweight (0.91g/cm³) yet highly durable

-Waterproof with zero water absorbency

-Excellent chemical corrosion resistance

-Twisted structure for strong grip with concrete matrix

Technical Data:

What are the advantages and benefits of PP twisted fiber?

-Superior to Steel Fiber: Lightweight (1/8 the density of steel), no rust in humid/alkaline environments, and won’t scratch mixing equipment or formwork.

-Excellent Dispersion: Twisted structure prevents agglomeration; disperses evenly in concrete to form a 3D support network.

-Cost-Efficient: Lower material and transportation costs than steel fiber; reduces maintenance expenses for concrete structures.

-Easy Construction: Compatible with standard concrete mixing equipment; no special training or tools required.

-Durable Performance: Resists acids, alkalis, and moisture; maintains strength over long service life without degradation.

-Enhanced Concrete Properties: Improves crack resistance, toughness, and impact resistance of concrete effectively.

What is the recommended dosage of PP twisted fiber?

-High crack resistance requirements: ≥3kg per cubic meter of concrete (volume ratio 0.3%)

-General crack prevention & reinforcement: 0.8kg of this fiber + 0.4kg of mesh fiber per cubic meter

-Note: Adjust dosage based on concrete grade and project specifications; consult our technical team for customization.

What process to mix PP twisted fiber?

Please follow the following steps to mix PP twisted fiber:

1.Add sand and PP Twisted Fiber into the mixer first.

2.Mix for 2 minutes to fully loosen the fiber (avoid agglomeration).

3.Add cement, aggregates, water, and admixtures, then mix evenly.

4.Alternative: Follow normal concrete mixing sequence, but ensure total mixing time is no less than 4 minutes. Extend vibration time appropriately to achieve full fiber dispersion.

What applications is PP twisted fiber utilized for? 

-Infrastructure: Highways, municipal pavements, bridge decks, tunnel linings, and subway structures

-Buildings: Industrial workshops, residential floors, basement walls, and shear walls

-Precast products: Concrete pipes, electric poles, drainage channels, and precast panels

-Special scenarios: Airport runways, port terminals, and water conservancy projects

How to store and handle PP twisted fiber properly? 

-Store in a dry, well-ventilated warehouse, away from direct sunlight and heat sources (temperature ≤40℃).

-Keep away from moisture, acids, alkalis, and oxidants to prevent fiber degradation.

-Seal the packaging after partial use to avoid contamination. Shelf life is 24 months under proper storage.

-Stack no more than 5 layers to prevent packaging damage and fiber agglomeration.

FAQ

Question 1: Can the fiber’s color be customized?

A: Yes. Regular colors are gray and white; other colors can be customized upon request.

Question 2: Does the PP twisted fiber affect concrete’s setting time?

A: No, it has no impact on concrete’s setting or hardening time.

Question 3: How to check if the PP twisted fiber is well-dispersed in concrete?

A: Cut a hardened concrete sample and observe its cross-section. No fiber clumps mean good dispersion.

Question 4: Is the PP twisted fiber cheaper than steel fiber?

A: Yes. Its material and transportation costs are 30%-50% lower, and it saves on rust-proof maintenance.

Question 5: Can PP twisted fiber be used in self-compacting concrete (SCC)?

A: Yes. Use 0.8-1.2kg per cubic meter; it won’t affect SCC’s flowability.

Question 6: How does the PP twisted fiber perform in cold areas?

A: It improves concrete’s freeze-thaw resistance. Use ≥2kg per cubic meter for cold regions.

Question 7: Do you provide free samples of PP twisted fiber?

A: Yes, we offer up to 200g free samples for quality testing. Contact us for details.