Beyond the Surface: How Co-Extruded Multilayer Tubes Protect Your Formula

In premium skincare, the packaging is not just a container — it is the first line of defense for your formula. Many high-performance ingredients, from Vitamin C to retinol and botanical extracts, are highly sensitive to oxygen, light, and moisture. A single-layer tube may look elegant, but it often fails to protect the product inside. This is where co-extruded multilayer tubes make a decisive difference.

What Is a Co-Extruded Multilayer Tube?

A co-extruded tube is manufactured by bonding two or more plastic layers together into a single, seamless wall during the extrusion process. Each layer serves a distinct function, working together as a high-performance barrier system.

A typical five-layer structure includes:

• Outer Barrier: Protects against external moisture and gives the tube its printable, durable surface.
• Tie Layers (x2): Special adhesive resins that bond incompatible materials together, keeping the structure intact.
• EVOH Barrier: The functional core — an ethylene vinyl alcohol layer that blocks oxygen and aroma loss, dramatically extending shelf life.
• Inner Sealant: A food-grade, chemically inert layer that safely contacts the formula without migration or reaction.

Why It Matters for Your Brand

The benefits are measurable. A multilayer tube can extend product shelf life, preserve the potency of active ingredients, and even allow brands to reduce preservative levels — a major selling point for clean beauty. Just as importantly, it protects the formula's scent, color, and texture throughout the product's entire life cycle.

Yangzhou Runfang's Capability

With 15 years of manufacturing expertise, Yangzhou Runfang produces high-barrier co-extruded tubes in diameters from 13mm to 60mm. Our EVOH barrier structures are engineered for demanding formulas, and our ISO 9001-certified lines ensure consistent layer thickness on every batch.