The function and requirements of the composite layer of the composite packaging bag
The composite packaging bag takes a typical three-layer structure composite flexible packaging material as an example. The function and requirements of the outer substrate (surface layer) are shown in the following tableThe role of the outer substrateRequireeffectMechanical strengthTensile, tear-resistant, impact-resistant, friction-resistantBarrierMoisture proof, gas barrier, fragrance retention, UV protectionstabilityLight resistance, oil resistance, organic resistance, heat resistance, […]