Synthetic Sleepers - Durable Composite Sleepers Supplier-Henan Kefei New Materials Technology Co., Ltd.

What Are
Synthetic Sleepers?

Synthetic sleeper composite is made of continuous glass fiber-reinforced polyurethane foam，a new type of synthetic sleeper product.

1. Product Overview: As conventional rail sleepers, timber and concrete sleepers have certain limitations. Therefore, synthetic sleepers have been developed and applied. Our new synthetic sleeper composite is made of continuous glass fiber-reinforced polyurethane foam，a new type of synthetic sleeper product.

2. Product Features: Our synthetic sleeper features low carbon and environmental protection, low rigidity, long service life, and high-cost performance. It is the best substitute for wood and concrete sleepers.

Various specifications of sleepers can meet the requirements of different working conditions.

3. Applicable Fields: It can be widely used in urban rail transit, ordinary railways, heavy haul railways, high-speed rail lines, depots, turnouts, bridges, and other sections.

4. Technological Innovation and Advantages: Compared to traditional polyurethane synthetic sleepers, we have achieved a one-step molding process with a thickness of less than 260mm through formula optimization and technological innovation. This eliminates the need for multi-layer composite bonding, thus avoiding environmental pollution and the risk of cracking in the bonding process associated with multi-layer composites. This addresses low pull-out resistance in traditional synthetic sleepers, improving product performance and production efficiency.

Our sleeper can be machined into various shapes or sizes by site surveying, CAD designing, NC machining, and installation. The dangerous work will be more accurate and more convenient.

Our High-Performance
Synthetic Sleeper Products

Our sleeper can be machined into various shapes or sizes by site surveying, CAD designing, NC machining, and installation. It can meet the usage requirements of different working conditions such as subway lines, high-speed railways, open bridge surfaces, and heavy-haul lines.

Main Parameters of Common Synthetic Sleepers
Main Performance Characteristics of High-strength Synthetic

Items	Technical Specifications	Items	Technical Specifications
Shear Strength	≥ 7 MPa	Shear Strength In Adhesion	≥ 7 MPa
Bending Strength	≥70 MPa	Young’s Modulus Of Bending Elasticy	≥ 6 GPa
Vertical Compression Strength	≥40 MPa	Breakdown Voltage	≥ 20 kV
Surface Resistivity	≥1×10¹⁰ Ω	Water Absorption	≤10 mg／cm²
Flame Retardant	HB Level	Finished Anti-bending Load	≥170 kN
Track Spike Pull Strength	≥15 kN	Screw Spike Pull Strength	≥ 40 kN
Fatigue Properties	10⁵ Times No Abnormalities	Apparent Density	0.74±0.10 g/cm³
Anti-Aging Properties (Fluorescence Irradiation 1,000h)	Bending Strength		≥50 MPa
	Young’s Modulus Of Bending Elasticity		≥4.2 GPa
	Vertical Compression Strength		≥30 MPa
	Shear Strength In Adhesion		≥5 MPa And Breakage Of Material
Referencing Jis E1203-2007, Applicable To Track Lines Laid On The Ground Such As Main Lines And Turnouts

Items	Technical Specifications	Items	Technical Specifications
Shear Strength	≥12 MPa	Shear Strength In Adhesion	≥12 MPa
Bending Strength	≥140 MPa	Young’s Modulus Of Bending Elasticy	≥9 GPa
Vertical Compression Strength	≥80 MPa	Breakdown Voltage	≥20 kV
Surface Resistivity	≥1×10¹⁰ Ω	Water Absorption	≤6 mg／cm²
Flame Retardant	HB Level	Finished Anti-bending Load	≥300 kN
Track Spike Pull Strength	≥15 kN	Screw Spike Pull Strength	≥60 kN
Fatigue Properties	2×10⁶ times no abnormalities
Anti-Aging Properties (Fluorescence Irradiation 1,000h)	Bending Strength		≥110 MPa
	Young’s Modulus Of Bending Elasticity		≥7 GPa
	Vertical Compression Strength		≥60 MPa
	Shear Strength In Adhesion		≥9 Mpa And Breakage Of Material
Applicable To Rail Tracks With Loads Exceeding 20 Tons Lines Laid On Bridges

Key Advantages of Kefei Synthetic
Sleepers Over Traditional Materials

Our composite sleepers are designed to solve the most common challenges in rail track maintenance, offering a compelling return on investment through extended service life and reduced operational costs.

01
Large Thickness Molding

Our new synthetic sleeper utilizes an innovative manufacturing process,enabling a single-step formation with a maximum one-time formation thickness of 300mm. The product exhibits minimal or no bonding,thereby ensuring increased reliability, safety, and stability.
02
Lightweight High Strength

With a lightweight design tailored to specific conditions, the density of our sleepers ranges between 0.7-1.0g/cm³,approximately one-third that of concrete. This facilitates convenient and swift on-site transportation and installation, reducing track laying times and lowering labor intensity.
03
Easy Machinability And Correctability

Our new synthetic sleeper utilizes an innovative manufacturing process,enabling a single-step formation with a maximum one-time formation thickness of 300mm. The product exhibits minimal or no bonding,thereby ensuring increased reliability, safety, and stability.
04
Safety And Reliability

Synthetic sleepers exhibit high resistance to rail spike pullout forces, ensuring a secure and reliable connection through the fastening system for long-term use.
05
Insulation And Waterproofing

Synthetic sleepers have good insulation and low water absorption,preventing rusting, stray currents, and water erosion.
06
Long Service Life

Synthetic sleepers have excellent weather resistance and fatigue properties, boasting a service life over five times that of wooden sleepers. They require minimal maintenance during their service life, resulting in a low overall cost of ownership.

Ideal Applications For
Composite Railway Sleepers

From harsh environments to high-traffic corridors, discover where Kefei synthetic sleepers deliver unmatched reliability and performance.

Synthetic sleepers are not a one-size-fits-all solution, but they provide exceptional benefits in specific, demanding applications where traditional materials struggle. Their unique properties make them the optimal choice for extending asset life and reducing lifecycle costs in challenging conditions.

PU Synthetic Sleepers

Rubber-Plastic Composite Rail Sleeper

Fastening System for Composite Sleepers

Technical Specifications

Our Synthetic sleepers are engineered to meet and exceed international standards. Below are the key performance metrics that define the quality of Kefei synthetic sleepers.

Kefei new materials is committed to transparency and quality. Our synthetic sleepers undergo rigorous independent testing to verify their performance claims. We design and manufacture in compliance with relevant international railway standards to ensure interoperability and safety. The data below is representative of our KF-Series Standard sleeper; specific grades may have enhanced properties.

Size of Sleepers

Our synthetic sleeper can be produced according to customer requirements, with aprocessing width of 400mm or less, a thickness of ≥ 100mm, and any length of the standard specifications of the sleeper. A variety of sleepers to meet the subway lines,high-speed railway, the bridge's surface, heavy lines, and other conditions of use requirements.

Machining Works

Our synthetic sleepers can be machined into various shapes or sizes by site surveying, CAD designing, NC machining, and installation. The dangerous work will be more accurate and more convenient.

Why Choose Kefei as Your Synthetic
Sleeper Partner?

More than just a supplier, Kefei is your dedicated partner in building resilient and sustainable railway infrastructure for the future.

Advantage

Kefei New Materials is a leading innovator in advanced composite solutions for infrastructure.

With many years of specialization in polymer engineering, we have channeled our expertise into revolutionizing railway track components. Our state-of-the-art production facility houses automated extrusion and molding lines capable of high-volume, precision manufacturing, ensuring every synthetic sleeper meets our exacting standards for consistency and quality.

We invest heavily in R&D, working closely with railway research institutes to develop next-generation materials that push the boundaries of performance.

Advantage

We understand that every rail project is unique.

Our technical support team, comprised of experienced engineers, works collaboratively with clients from the planning stage through to installation. We offer comprehensive services including custom design for special sleepers, on-site technical guidance, and detailed installation documentation.

Our products are supplied to national railways, private freight operators, and urban transit authorities across multiple continents, building a proven track record of reliability.

Advantage

Ready to reduce your long-term maintenance costs and build a more durable track?

Contact our experts today for a detailed consultation, a quote tailored to your project specifications, or to request samples and full technical documentation.

Let's discuss how Kefei synthetic sleepers can provide the resilient foundation your railway needs.

Synthetic Sleeper

What Are Synthetic Sleepers?

Our High-Performance Synthetic Sleeper Products

What Are
Synthetic Sleepers?

Our High-Performance
Synthetic Sleeper Products