How should we think of the recyclable packaging
Recyclable packaging (single material) is a new technology, and the entire soft packaging industry is still in the stage of exploration and
breakthrough, but the past phased results have certain guiding significance for how we can better view recyclable packaging.
The key technology of single-materialization
1.Quality improvement and weight reduction of basic membrane materials
Optimize the combination of raw materials of the same composition,efficiently use multi-layer co-extrusion technology,and develop barrier,
heat-sealing，high-transparency and other functional substrate films，under the premise of weight reduction and thinning.
2.Energizing membrane surface
Research the surface properties of the sbustrate film,and develop functional coatings ,coating processes,and evaporation processes,such
as synergistic primers,functional composite adhesives or printing inks,vacuum evaporation of aluminum,alumina,silica,ect.Functional
coating and its processing technology.
3.High -quality recycling process and auxiliary material technology development of plastic flexible packaging
Including recycling additives,reprocessing technology,recycled material standards,recyclable evaluation method etc.
Elements of single-material design
1.Barrier
2.Hot-sealing
3.Retort resistence
4.Quality improvement and weight reduction
5.High-quality and recyclable
| The challenge in the production of full PE pouch | ||
| Pouch structure BOPE/PE | Problem | Solution |
| Printing | Compared with the traditional PET,Nylon and PP,PE has special properties and the overprinting accurancy is slightly different | 1.Pay attention to the layout design to avoid more colors,overlapping colors and higher accuracy requirements for overprinting,the elements and patterns should be as simple as possible； 2.Select a printing machine with high printing accuracy control ability； 3.Printers need to be trained to adapt to material characteristic； |
| Bag-making | Zipper discoloration(scalding),bag edge running | 1.Adjust the formula with HDPE and low-temperature LDPE to increase the temperature difference of the material,and try to provide a wider bag-making temperature window; |
| Uneven round corners,uneven sealing edge | 2.The bag making machine needs to improve the temperature control ability.The temperature fluctuation range is as smalll as possible,and the pressure control to be suitable; | |
3.The film rolls into rolls,and the film quality needs to be controlled well to avoid TD/MD deflection.The printing and winding tension cannot be too large； 4.The bag-making process needs to be adjusted,and the temperature and material should be controlled as finely as possible during the Swing and position fluctuation on the bag-making machine | ||
| Filling and Sealing | Hot sealing deformation | 1.The temperature control of the sealing equipment needs to be accurate,with small fluctuations. Generally need to configure high warm cloth,and pay attention to regularly and timely clean up dirty adhesions； |
2.After the formula in the general bag-making process is adjusted, the deformation of the seal will not be very serious； | ||
| 3.Hard roll sealing is not recommended | ||
4.Customer production equipment replacement or replacing the packaging delivery method | ||
