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How to choose more environmentally friendly composite packaging bags?
2025-10-28
1、 Anchor a single material, prioritize recyclable design
The core selectionlogic of green and environmentally friendly composite Bags is "easy to recycle, low pollution", and a single material structure is currently the optimal solution.
Traditional multi-layer heterogeneous composite bags (such as PET/PE) have been gradually phased out by the market due to the difficulty in separating materials and a recycling rate of less than 10%. Priority should be given to selecting 100% PE or PP based composite bags, achieving multi-layer homogeneous composite through co extrusion technology.
The outer layer ensures printing and wear resistance, while the inner layer meets heat sealing and leak prevention requirements, and can achieve 100% recycling. This type of packaging bag also supports the addition of more than 30% recycled materials (rPE/rPP), with a carbon footprint 30% lower than traditional composite bags, while avoiding the pollution risk caused by adhesive bonding, which is more in line with environmental requirements.
2、Verify authoritative certification and avoid the trap of "pseudo environmental protection"
Environmental attributes need to rely on authoritative certification endorsement to avoid being misled by vague labels such as "degradable" and "renewable".
At the international level, GRS certified products are preferred, ensuring that the proportion of recycled materials is ≥ 20% (B2B transactions), and suppliers can provide TC transaction certificates and recycling traceability records.
The food packaging scene also needs to comply with the GB 4806 series safety standards, and the indicators such as solvent residue and heavy metals need to meet the standards. Preliminary screening can be conducted by "looking at the appearance (flat and free of impurities), smelling the odor (no irritating odors)".
Products exported to the EU require additional EN 15343 certification to ensure compliance with recycling traceability and avoid trade barriers.
3、Match scenario requirements, balance environmental protection and functionality
Environmentally friendly choices that are detached from usage scenarios are meaningless and require precise selection based on core needs. Food Packaging should prioritize safety and barrier properties, usingPE based single material bags containing recycled materials and avoiding contamination through adhesive free composite processes;
Beauty and daily chemical packaging focuses on sealing and leakage prevention, with PP based composite bags or plant fiber+PLA composite bags being more suitable; The e-commerce logistics scenario can choose to recycle HDPE composite bags, balancing the advantages of wear resistance and low cost.
For industrial non food packaging, recycled PET composite bags can be used to reduce costs and resource consumption by utilizing their high strength and moisture resistance.
4、Control cost logic to achieve a win-win situation for environmental protection and profitability
Environmental protection does not mean high costs, and expenditures can be controlled through scientific strategies. In terms of material procurement, bulk or joint procurement of recycled materials can reduce raw material costs by about 30%;
In terms of process optimization, adopting co extrusion technology instead of traditional composite printing simplifies the printing process and can improve production efficiency by 25%. Green packaging subsidies can also be applied for, and third-party recycling platforms can be connected to reduce disposal costs.
Some companies have saved 10% of their research and development expenses through policy dividends. In the long run, composite bags with high environmental attributes can attract consumers willing to pay a premium of 10% -15%, and instead enhance brand profitability.
5、Connect the recycling system and build a closed-loop environmental protection system for the entire chain
True green environmental protection requires the integration of the "use recycling" process, and regional recycling infrastructure should be considered when choosing.
Priority should be given to using materials from mature local recycling channels to avoid turning "environmentally friendly materials" into garbage due to difficulties in recycling. At the same time, attention can be paid to composite bags with detachable and modular design to improve their reuse rate.
At the enterprise level, a closed-loop recycling system can be established, and upstream suppliers can jointly build recycling channels to ensure that packaging waste can be smoothly converted into recycled raw materials, achieving the minimization of environmental impact throughout the entire lifecycle.