Composite Container Bottom With Oxygen Barrier Layer

The patent applies composite materials by combining a fibrous base material (such as cardboard or paperboard) with a thin metal foil layer (such as aluminum or steel) to create a bottom structure that provides both structural strength and good sealing properties while minimizing weight. The fibrous material provides bulk and strength, while the thin metal layer provides barrier properties and sealing, achieving the desired balance between strength, weight, and functionality.

The patent merges the composite bottom assembly with the container body in a single forming operation, where the bottom is formed as an integral part of the container wall. This integration eliminates separate assembly steps and allows both components to be manufactured simultaneously in one continuous process, significantly improving production efficiency and throughput while maintaining the weight benefits of composite construction.

The patent applies parameter changes by precisely controlling the temperature, pressure, and humidity conditions during the forming process to optimize the behavior of the composite bottom materials. By maintaining specific temperature ranges and pressure levels, the process ensures proper adhesion between layers, prevents formation of pin holes and cracks, and eliminates pleats, thereby producing defect-free composite bottoms with high reliability.

The patent uses composite materials with inherent low oxygen transmission properties, such as metallized films or coated fibrous materials, that provide effective oxygen and moisture barriers without requiring multiple separate barrier layers. The composite structure integrates the barrier function within a single multi-layer assembly that can be formed in one operation, maintaining product freshness while avoiding excessive manufacturing complexity.