In the world of geomembrane and geosynthetics manufacturing, roll integrity matters just as much as the material itself. Large, high-weight rolls require consistent support during winding, storage and transport, and that starts with the core.

Customers in geomembrane film rely on Sonoco extruded plastic cores and  tubes for their strength, durability and dimensional consistency. Six-inch industrial cores are engineered to meet the demands of high-performance applications, protecting sensitive products and supporting efficient manufacturing from start to finish.

Built for the Heaviest Demands

The weight and rigidity of geomembrane film rolls make core performance critical. Sonoco’s 6-inch plastic industrial cores are built with strength and precision to support heavy rolls through winding, handling and transport.

With a tightly controlled inner diameter, each film core integrates seamlessly with plugs, mandrels and automated winding systems. Superior crush and beam strength help prevent deformation under pressure, from clamp handling to long-distance shipping.

Our high-performance plastic cores also dissipate radial pressure, protect internal diameter integrity and reduce core length growth. The result is smoother winding, less waste and better performance across the entire manufacturing process.

Designed for Protection and Performance

When dealing with high-value barrier films, the core plays a direct role in preserving surface quality and roll integrity. Sonoco’s heavy-duty plastic cores are engineered with surface characteristics that help minimize markings, scratches or other damage during winding, storage and transport.

Made from durable plastics like polypropylene, styrene, ethylene and ABS, these cores are built to perform under pressure without transferring defects to the film. Their smooth outer finish supports clean, consistent winding and protects sensitive geomembrane layers from imprinting.

With excellent total indicator runout (TIR) and ovality control, Sonoco plastic cores maintain roundness and straightness for precise winding, stable stacking and fewer roll issues downstream. The result is better protection, improved equipment performance and reduced waste.

Applications Across the Geosynthetics Industry

Sonoco doesn’t make geomembranes, but our winding cores play a critical role in how those materials are handled, protected and delivered. From the production floor to the installation site, the right core helps ensure roll stability and performance consistency.

Our plastic film cores are used across a wide range of geosynthetic applications, including:

  • Landfill liners and capping systems
  • Mining leach pads
  • Reservoirs, canals and water containment systems
  • Agricultural ponds and lagoons
  • Gas and VOC containment barriers

These are some of the most demanding environments in the industry, where geomembrane damage or deformation during transit can result in costly delays or replacements. Sonoco cores offer high-value options for packaging, protection and reuse, helping producers maintain film integrity while reducing waste and improving roll handling efficiency.

Trusted by Geomembrane Producers

Leading geomembrane manufacturers trust Sonoco to supply winding cores that support some of the heaviest and most sensitive plastic film rolls in the industry. With decades of experience and a global footprint, we offer the scale and technical expertise required for high-spec, high-volume production environments.

Our QS 2000 high-end film cores deliver excellent crush resistance, straightness and minimum quality variation. Combined with dust- and moisture-free performance, these features help protect product integrity during winding, storage and shipping, especially in clean environments.

Sonoco’s engineering and tooling teams collaborate directly with customers to meet precise application needs. Cores are available in customer-specified lengths and winding speeds, supporting tight production windows and operational consistency. Whether you're ramping up output or launching a new product line, Sonoco is positioned to deliver reliable, repeatable results. 

In geomembrane and geosynthetics manufacturing, the right core makes all the difference. Sonoco’s 6-inch industrial cores are built to handle the weight, precision and performance requirements of some of the most demanding barrier film applications in the world.

Need a core designed for your heaviest, most sensitive geomembrane films? Contact Sonoco Industrial & Specialty Plastics f  or engineered core solutions that deliver strength, reliability and protection from start to finish.