Stretchable Packaging Film With Reinforcement Elements

The patent applies local quality by providing reinforcement elements only in specific regions where strength is needed, rather than uniformly across the entire film. The reinforcement elements are positioned at the edges and in strategic locations to provide local strengthening without requiring high stretching forces across the whole film, thus resolving the contradiction between overall strength and stretching force requirements.

The patent uses composite materials by combining the stretch film base material with additional reinforcement elements made of different materials (such as woven or non-woven fabrics, metal foils, or adhesive-backed reinforcements). This composite structure provides enhanced strength while maintaining manageable stretching forces, as the reinforcement elements bear part of the load without requiring the entire film to be stretched with high force.

The reinforcement elements are strategically positioned to provide localized support in areas where high stretching forces would otherwise be transmitted to the products. By concentrating reinforcement at edges and critical regions, the film can achieve the required elongation while the reinforcement protects vulnerable areas from excessive force, preventing product damage.

The reinforcement elements act as a protective cushioning layer that is already in place before stretching occurs. During the pre-stretching process, these reinforcement elements absorb and distribute the stretching forces, cushioning the products from the full impact of the stretching force while still allowing the film to achieve the necessary elongation for proper wrapping.

The patent applies local quality by concentrating reinforcement elements only in specific regions where holding force is most needed, such as edge areas and high-stress zones, rather than uniformly thickening the entire film. This localized reinforcement approach increases holding force in critical areas while minimizing overall material usage, thus reducing material waste and cost compared to uniformly thicker films.

The use of composite materials allows achieving high holding force with minimal material by combining a thin, lightweight base film with strategic reinforcement elements. The reinforcement elements provide the necessary strength and holding force in critical areas, while the majority of the film remains thin and lightweight, optimizing material utilization and reducing waste.