Views: 101 Author: Site Editor Publish Time: 2024-07-15 Origin: Site
The barrier properties of flexible packaging have a great impact on the shelf life and shelf life of the contents. At the same time, the recyclability of flexible packaging is a global environmental requirement. Without barrier properties, flexible packaging cannot meet the needs of life and production; without recycling value, flexible packaging cannot be recycled. Therefore, how to achieve barrier properties and environmental protection is an important issue for innovative sustainable flexible packaging.
As we all know, the main methods to improve the barrier properties of flexible packaging include multi-layer lamination, multi-layer co-extrusion, coating, or a combination of several methods. In addition to some contents that have strict requirements on barrier properties or other packaging properties and cannot use a single material for the time being, more and more packaging applications are beginning to consider a single material. The general trend of flexible packaging is to remove aluminum and nylon and use a single material for composite bag making.
The following introduces several common processes that improve barrier properties and can be used for single-material lamination.
PVA Coating
PVA coating liquid can be coated on many types of substrates, especially on the heat-sealed PE layer, and also brings an environmentally friendly packaging innovation structure. Coated on PE single material to improve its oxygen barrier properties. PE material is a plastic with high utilization efficiency and can be recycled and granulated for reuse. Optimize the packaging structure while achieving its high barrier properties, contributing to the development of a circular economy, recyclable, and degradable materials. It is recommended to use a single material structure: PE/PVA/PE, OPP/PVA/CPP.
Vacuum Aluminum Plating
Vacuum aluminum plating is used to heat and melt aluminum metal to evaporate under vacuum, and aluminum atoms condense on the surface of polymer materials to form an extremely thin aluminum layer, usually with BOPET and BOPP as the substrate. The ultra-high barrier vacuum aluminum plating layer has excellent oxygen and moisture barrier properties and organic aluminum layer adhesion. It can replace VMPET or aluminum foil and is used as the middle layer of multi-layer composite structures to make the composite materials homogenized.
Multi-layer Co-extruded MDOPE
Currently, MDOPE and BOPE are the two main single materials. Co-extruded MDOPE film is also an effective way to achieve the barrier properties of a single material. MDOPE film has good rigidity, transparency, puncture, and heat resistance, overcoming the biggest obstacle of traditional multi-material composite flexible packaging with no recycling value.
Environmentally friendly flexible packaging with improved barrier properties is not only good for the environment but also provides practical advantages for businesses and consumers. As the industry continues to develop, cooperation between brands and professional packaging partners is essential to achieve a balance between sustainability and performance. By prioritizing environmentally friendly packaging with enhanced barrier properties, brands can effectively reduce their impact on the environment while ensuring the quality and life of packaged products. BioPack provides a variety of high-barrier sustainable flexible packaging solutions with different processes for different brand companies. If you want to learn more, please contact us now to send an inquiry and get a free quote!