【Bangladesh BRB Case】How the 70+90 High-Speed PVC + Nylon Tandem Extrusion Line Helped BRB Upgrade Standards for Building Wiring and Industrial Control Cables

BRB Cable Industries Ltd., a leader in the Bangladeshi cable industry, is committed to supplying high-quality, durable cable products for the nation's growing urban infrastructure and industrial projects. To enhance the production efficiency and performance of their core building wiring (e.g., THHN/THWN type cables) and industrial control cables, Changzhou Kunbo Electromechanical Technology Co., LTD successfully delivered a highly reliable, high-efficiency 70+90 PVC + Nylon Tandem Extrusion Line. This investment has been crucial for BRB to consolidate its market leadership in South Asia.

Case Details: Tandem Technology Achieves High-Strength, Abrasion-Resistant Cables

• Client Background: BRB Cable Industries Ltd., one of the largest cable manufacturers in Bangladesh, with products widely used in infrastructure and civil construction.

• Market Pain Points:

  1. Traditional single-layer insulated cables often suffered from insufficient abrasion resistance and scratch resistance in complex building wiring environments, leading to damage during installation.

  2. The need to increase production capacity and use tandem extrusion technology to complete the PVC insulation layer and Nylon (Polyamide) sheath in a single extrusion process, achieving thin-wall, high-strength international standard cable manufacturing.

  3. The equipment must possess high reliability to ensure 24/7 stable operation in the challenging Bangladeshi environment.

• Our Solution:

  Our provided 70+90, PVC + Nylon Tandem Extrusion Line solution, customized for BRB, focused on the following key technologies:

  • 70+90 Tandem Extrusion Configuration: A 70mm extruder handles the PVC insulation layer, immediately followed by a 90mm extruder for the thin Nylon sheath. This tandem layout ensures synchronous extrusion of both materials at high temperatures, guaranteeing perfect adhesion between the insulation and sheath, and minimal eccentricity.

  • Nylon Dedicated Extrusion System: The 90mm extruder is equipped with a high-pressure die head and precise melt pressure control, specifically designed for the high-viscosity, hygroscopic Nylon material, ensuring the uniformity and density of the thin Nylon sheath.

  • Efficient Cooling and Take-Up: Features a large-capacity multi-section cooling water trough and a high-precision tension control system to ensure the tandem-extruded cable is quickly set and stably taken up, preventing deformation of the Nylon layer at high temperatures.

 Results and Value

BRB successfully used this tandem line to produce high-strength PVC + Nylon cables (such as THHN/THWN) that meet international standards. The products' abrasion and oil resistance significantly improved, earning high recognition from local contractors. The tandem technology boosted production efficiency by 50%, while enabling thin-wall design, effectively saving material costs.