The Ultimate Guide to Polymer Modified Bitumen (PMB) Plants: DXL-35S High Shear Technology

In the demanding world of road construction, standard bitumen often fails to meet the performance requirements of modern highways and airports. The solution lies in Polymer Modified Bitumen (PMB)—specifically SBS and Rubber modified asphalt.

However, producing stable, high-quality PMB requires more than just mixing ingredients. It requires precise shearing and temperature control.

Introducing the Feiteng DXL-35S, our flagship Polymer Modified Bitumen Plant designed for high-efficiency production and global logistics.

1. Core Technology: Supramolecular High Shear Colloid Mill

The difference between a "mixture" and a "modification" is the particle size. The DXL-35S is equipped with a Supramolecular High Shear Colloid Mill, the heart of the system.

• Micron-Level Grinding: The mill features a precision-engineered stator and rotor with a gap adjustable between 0.1mm and 0.5mm. When the mixture of bitumen and SBS (or Crumb Rubber) passes through, it is subjected to intense hydraulic and mechanical shear.

• Single-Pass Efficiency: Unlike older systems that require multiple circulation loops, our high-shear technology ensures that polymers are dispersed into the bitumen matrix effectively, often in a single pass.

• Durability for Rubber: The grinding head is treated with wear-resistant alloys, making it perfectly suitable for processing abrasive Crumb Rubber Modified Bitumen (CRMB).

2. The DXL-35S Production Workflow

Based on the technical specifications of the DXL-35S (35m³ Capacity), here is how we ensure consistent quality for every batch:

Step 1: Precise Dosing & Weighing

The DXL-35S features a built-in Weighing and Measuring System.

• Whether your formula requires 4% SBS or 15% Rubber Powder, the PLC system controls the exact weight of additives. This eliminates human error and ensures that your asphalt binder meets the strict SHRP or PG grading standards.

Step 2: High-Power Agitation

Inside the 35,000-liter tank, we utilize Frequency Conversion Speed Agitators.

• These powerful mixers ensure that the polymer particles are fully wetted and "swollen" by the hot bitumen before entering the mill. The variable speed control prevents splashing while maintaining a uniform suspension.

Step 3: Shearing & Developing

The mixture is pumped through the colloid mill for shearing and then returned to the tank for development (curing). The polymer network forms within the bitumen, significantly improving its elasticity and softening point.

3. Smart Control: Siemens PLC System

We have integrated a fully automated Siemens PLC Control System into the DXL-35S.

• Visual Operation: Operators can monitor the entire flow—temperature, liquid levels, and valve status—on a user-friendly touch screen.

• Safety Interlocks: The system is programmed with logic protection. For example, the colloid mill will not start if the bitumen temperature is below the set point, preventing damage to the motor and seals.

• Data Logging: Production data (temperature curves, ratio history) can be recorded for quality assurance audits.

4. Containerized Design: Ready for Global Shipping

One of the biggest challenges for international buyers is shipping costs. The Feiteng DXL-35S is engineered to solve this.

• Dimensions: Approx. 12m (L) × 2.25m (W) × 2.55m (H).

• Logistics: The entire plant fits perfectly inside a standard 40HQ Container.

• Plug-and-Play: The unit comes skid-mounted with pre-installed piping and wiring. Once on site, you simply connect it to your external Thermal Oil Boiler and main power supply.

Note: The DXL-35S is designed to use an external thermal oil source for heating, which is safer and cleaner than direct-fire models.

Conclusion

The Feiteng DXL-35S represents the next generation of modified bitumen production. By combining a massive 35m³ capacity with precision high-shear technology and containerized logistics, it offers the perfect balance of performance and practicality for asphalt mixing plants worldwide.