Moisture and Light Protection - With moisture-resistant PE and lightproof AL layers, the Trapezoidal mouth paper-plastic composite bag is perfect for keeping sensitive materials safe. It prevents moisture penetration, making it particularly useful for materials like TPU and PBAT, which can degrade when exposed to humidity. - The lightproof properties also protect UV-sensitive products from sunlight, preventing discoloration or chemical degradation, which is crucial for maintaining the material's performance during extended storage. Environmentally Adaptive Design - The Trapezoidal mouth paper-plastic composite bag is built to withstand various environmental conditions, whether in humid, dry, or outdoor storage facilities. Its strong construction ensures that the contents remain safe, regardless of the surrounding climate, making it versatile across different industries.