Reliable filtration starts at the core. For pool filter manufacturers and spa designers, the right components determine how well a filter performs, how long it lasts, and how it supports users. Sonoco understands these expectations, and we engineer every component to promote cleaner water, smoother operation, and long-term durability. As a partner to leading filter manufacturers, we’ve built our reputation on consistency, trusted performance, and the ability to strengthen both established systems and new product innovation.

Engineered Plastic Filter Cores for Strength, Stability, and Flow

Sonoco’s plastic filter cores are designed to meet the most demanding requirements of pool, spa, and industrial filtration. We focus on structural integrity and efficient flow so manufacturers can deliver durable products that perform reliably in real-world conditions.

Our design includes:

  • Longitudinal and radial ribs for high collapse strength
  • Chemical and thermal resistance for harsh operating environments
  • Smooth or stippled finishes for fiber retention and precise media placement
  • Controlled open-area patterns to promote maximum flow

Material options such as polypropylene, ABS, acetal, and glass-filled nylon give manufacturers flexibility to match the core to their system’s pressures, temperatures, and functional targets. 

Tailored Filter Core Solutions for Pool and Spa Manufacturers

Sonoco builds purpose-designed pool and spa filters that advance both premium results and production efficiency. These cores feature:

  • A 0.125-inch wall thickness for strength
  • 56.5% open area for smooth, consistent flow
  • Stackable designs that simplify handling and assembly
  • Smooth finishes for easy media integration

They are available in standard or talc-filled polypropylene to provide added rigidity when needed.

This flexible approach helps product developers create solutions that meet their exact technical goals without compromising on consistency or cost.

Clean, Consistent, and Cost-Effective Plastic Filter Cores

For decades, Sonoco has supported filter manufacturers with plastic components shaped by precision and backed by robust quality frameworks. Tight dimensional tolerances and cleanroom-ready production capabilities enable a higher standard of cleanliness and dependability.

This level of control delivers practical benefits:

  • Lower risk of damage or deformation during assembly
  • Reduced waste and fewer rejects
  • More predictable performance in the finished filter

Our experience in filtration gives our partners confidence that every core will meet expectations from first production runs to long-term supply.

Let's Build Better Filters Together

Sonoco is more than a supplier. We’re a partner focused on delivering performance, reliability, and ongoing guidance across the pool and spa market. Whether you’re refining an existing product or developing a new design, we’re here to help you build smarter, stronger filter cores and frames.

Looking for a smarter core solution for your next product? Contact Sonoco to start a conversation.

Frequently Asked Questions About Sonoco Filter Cores

Can Sonoco customize filter cores and frames to meet unique brand or system requirements?

Yes. Sonoco can customize filter cores and frames to meet unique brand needs, system requirements, or original equipment manufacturer (OEM) specifications. Manufacturers can request custom cut sizes to ensure the right fit and performance for their specific application.

What makes Sonoco a trusted partner for pool filter manufacturers?

Sonoco earns trust by delivering dependable quality, collaborative support, and manufacturing expertise our partners can rely on. Pool filter manufacturers value Sonoco’s consistent materials, reliable supply, and ability to support both long-standing product lines and new system development.

How does Sonoco ensure the performance and durability of its filter cores?

Sonoco ensures performance and durability through intentional design and proven materials. Filter cores are engineered with structural strength and optimized flow in mind, helping manufacturers deliver products that hold up under demanding pool, spa, and industrial filtration conditions.