1. Material of express delivery bags: The materials commonly used for express delivery bags are LDPE and HDPE, both of which have toughness that meets the standards. In addition to using new materials for express delivery bags, some use recycled materials. The toughness of recycled materials for express delivery bags is slightly worse than that of new materials, and the printing effect is also much worse. Therefore, it is generally recommended to use brand new materials.
2. The thickness of the express bag: Generally speaking, the thicker the thickness, the higher the material cost. Therefore, choose the appropriate thickness of the express bag based on the weight and other attributes of the goods shipped. From the perspective of saving resource costs and reducing express weight as much as possible, thinner thickness should be chosen.
3. Solid edge sealing of express delivery bags: If the edge sealing of express delivery bags is not firmly bonded enough, it is easy to crack and cannot meet the requirements of shipping safety. It is necessary to choose express delivery bags with stable edge sealing technology and materials, and find a reputable express delivery bag manufacturer with quality assurance.
4. Destructive properties of sealing adhesive for express delivery bags: The thicker the adhesive, the more destructive it is, and the more expensive the adhesive, the more adhesive it is. To achieve a one-time high destructive sealing effect, it is necessary for the adhesive to be suitable for the characteristics of the material of the express delivery bag itself, especially closely related to the formula of the express delivery bag. Generally, if there is more adhesive, it will be more sticky and the destructive sealing effect will be better. Another point is that the viscosity of glue is affected by temperature, and it is difficult for ordinary express bags to achieve destructive effects in low temperature environments. And our company's developed express bag formula can reach minus 5 degrees Celsius to maintain good breaking adhesion.