Low-Tack Self-Adherent Adhesive Composition for Reclosable Packaging

The patent applies parameter changes by modifying the adhesive's tack level through formulation adjustments. Specifically, it uses a lower-tack pressure sensitive adhesive compared to conventional high-tack adhesives, changing the physical-chemical parameters of the adhesive to achieve both manufacturability and functional performance. The adhesive is formulated to have reduced initial tack while maintaining adequate bonding strength for reclosure applications.

The patent employs composite materials by formulating the pressure sensitive adhesive as a complex composition containing multiple components including polymers, plasticizers, and other additives in specific proportions. This composite formulation enables the adhesive to simultaneously achieve lower tack for ease of manufacture and sufficient cohesive strength to prevent delamination, resolving the contradiction between manufacturability and reliability.

The patent applies the extraction principle by removing harmful solvents from the adhesive formulation entirely. It develops a solvent-free pressure sensitive adhesive composition that achieves the desired adhesive performance through careful selection and combination of polymer components and plasticizers, eliminating the need for solvent evaporation and associated environmental and safety concerns.

The patent applies parameter changes by optimizing the molecular weight, glass transition temperature, and chemical composition of the polymer components in the UV-curable adhesive system. It selects specific polymers and plasticizers with tailored properties to achieve adequate peel strength and adhesive effectiveness while maintaining the solvent-free formulation and UV-curable characteristics.