Global Flexible Packaging Market Size, Share and Industry Analysis Report by Material (Polymer [Polyester, Polyethylene, Polystyrene, Polypropylene], Paper, Aluminum, Cellulosic), Product (Pillow Pouches, Stand-up Pouches, Four Side Seal Pouches) and Application (Food & Beverage, Personal Care, Healthcare, Industrial), Regional Outlook, Application Potential, Competitive Market Share & Forecast, 2022 – 2028