Global Polyethylene Terephthalate (PET) & Polybutylene Terephthalate (PBT) Resins Market Size, Share, Analysis Report By PET Type (Recycled PET, Transparent & Non-Transparent PET), PET Application (Films, Cosmetics, Bottles, Food Packaging, Others), Region and Key Players - Industry Segment Overview, Market Dynamics, Competitive Strategies, Trends and Forecast 2025-2034