Fiberglass Core Combo Mat: High-Efficiency Combiflow Reinforcement for Vacuum Infusion

Dry Spots. Slow Infusion. Resin Waste. Sound familiar?

In large‑scale vacuum infusion — whether you’re molding a 45‑foot boat hull or a wind blade shell — uneven resin distribution is the number one cause of rework. Thick laminates, complex geometries, and low‑permeability cores create flow restrictions. The result: dry spots, extended cycle times, and unpredictable mechanical properties. Many shops compensate by adding external flow mesh, but that means more consumables, more labor, and more waste.

One Material. Structural Reinforcement + Internal Flow Media.

Fiberglass Core Combo Mat (Combiflow) eliminates the need for disposable flow mesh by integrating a high‑permeability polypropylene core between layers of chopped strand mat (CSM) or multiaxial fabric. The core acts as a permanent resin distribution channel — open during infusion, then fully consolidated in the finished laminate. You get rapid, uniform wet‑out across the entire part without sacrificing interlaminar shear strength. The entire structure is stitched with polyester yarn — zero chemical binders — ensuring 100% compatibility with epoxy, vinyl ester, and unsaturated polyester resin systems.

Specifications at a Glance

Core Combo Series — Technical Data

Custom layups available: UD, triaxial fabrics, or adjusted core density on request.

Where Combiflow Performs

Marine — Hulls, Decks, Bulkheads

• Vacuum‑infused boat hulls: Combiflow’s internal flow channels deliver resin uniformly across 10 m+ hulls — no dry spots at the chine, no resin‑rich zones at the sheer. Shipyards report 20–30% faster infusion cycles and consistent laminate consolidation.
• Sandwich decks and superstructures: The mat replaces separate flow media while adding structural thickness. Reduces overall consumable cost per hull by eliminating peel ply and flow mesh in core‑dense areas.

Wind Energy — Blade Shells & Nacelle Covers

• Turbine blade shells (vacuum‑assisted RTM): Thick root sections and shear web areas demand reliable resin flow. Combiflow ensures resin reaches the entire thickness before gel, critical for parts exceeding 40 mm. Used in both prototype and production blades.
• Nacelle covers and spinner caps: Complex curvature and varying thickness. The mat conforms to mold contours while maintaining consistent permeability — fewer voids, less rework.

Why Composites Engineers Choose DISLAB Combiflow

• Integrated design, not just another mat. Unlike generic CSM/PP sandwiches, our core combo is engineered with optimized fiber orientation and core permeability to function as a true internal flow medium — not just a bulker.
• Consistent roll‑to‑roll performance. Weight tolerance held to ±5%, and we monitor core porosity in‑line. Your infusion process stays predictable — from prototype to full production.
• No chemical binders — full resin compatibility. Stitched‑only construction means no styrene‑soluble binders that can inhibit cure or reduce interlaminar adhesion.
• Custom constructions without long lead times. Need a UD/PP/CSM layup or a specific areal weight? We configure it. Minimum order quantities are flexible for industrial trials.
• Technical support that understands the process. We don’t just ship rolls. Our team helps you optimize infusion strategies — reducing cycle time and consumable spend.