High Performance Cores for Flexible Film: why the cardboard tube matters

Flexible Film cores are more than a way to wind film — they’re precision components that protect uptime, product quality, and your bottom line. At Just Paper Tubes, we engineer cores that run cleanly on high-speed lines, resist crush in storage and transit, and deliver consistent mandrel fit from the first wrap to the last.

Standard strength vs High Performance Cores — what’s the difference?

Use case	Standard strength cores	High Performance Cores
Film type & duty	Everyday PE/LDPE, PVC, BOPP, short runs	Thin-gauge films, wide webs, long lengths, high tension
Line speed & tension	Low–medium speeds, moderate tension	High-speed winding, tight tension control, rapid starts/stops
Environment	Normal handling/indoor storage	Humidity, export, stacking pressure, long dwell times
Performance focus	Cost-effective reliability	Maximum crush resistance, stiffness, roundness, and tight ID tolerance

Bottom line: If you’re seeing telescoping, edge damage, mandrel slip, or ovality at speed, specify High Performance Cores built with high-grade coreboard/papers and optimised ply design.

What makes a great Flexible Film core?

• Tight ID control: Repeatable mandrel fit to prevent slippage and vibration.

• Crush & stiffness: High ring/flat crush and bending stiffness to handle roll weight and stacking loads.

• Roundness & concentricity: True running cores reduce tension spikes and film defects.

• Surface & edges: Clean, smooth finishes (no glue bleed) for tidy winding and safer handling.

• Moisture resistance: Barrier options help maintain strength in humid plants or export lanes.

• Sustainability options: Recycled papers available on request.

  
  

Why choose High Performance Cores from Just Paper Tubes?

• High performance paper & ply design: We combine premium coreboard and high-performance papers with tailored ply orientation to boost radial strength and dynamic stiffness without unnecessary weight.

• Engineered tolerances: Consistent IDs and length tolerances matched to your mandrels and slit patterns.

• Built for speed: Concentricity and roundness that hold up on modern, high-speed winders.

• Protection in the real world: Options for moisture barriers and heavy-duty ends to reduce transit and warehouse damage.

• Branding & traceability: Print, colour coding, barcodes, and batch IDs to keep your lines organised.

When should you upgrade from standard to High Performance Cores?

Choose High Performance Cores if you have any of the following:

• Ultra-thin or tacky films (e.g., stretch, cling, CPP/BOPP laminates)

• Long-length or wide-web rolls with high roll weights

• High-speed winding with frequent accelerations/decels

• Telescoping, dish-ends, or core ovality in QC checks

• Export routes, humid storage, or tall pallet stacks

  
  

FAQs

Do High Performance Cores reduce telescoping? Yes — higher radial strength, better roundness, and tighter IDs maintain roll geometry under load, which helps prevent telescoping and dish-ends.

Are they heavier? Not necessarily. Using high-performance papers and smarter ply design often achieves higher strength without adding unnecessary mass.