Polyvinyl Chloride Packaging Film Market Size & Forecasts 2026-2035, By Segments (Layer Type, Packaging Type, Extrusion Technology, End-Use Industry, Application), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (BASF, Sekisui Chemical, Kaneka, Cosmo Films, SKC)