The packaging of crayfish is facing a harsh environment that is rare in ordinary food: the boiling red oil soup tests the instant high temperature resistance of the sealing film during filling; The formula rich in oil requires materials to have excellent impermeability; The drastic temperature difference from high-temperature filling to cold chain storage requires the sealing film to maintain a stable seal during the thermal expansion and contraction process. In addition, the liquid shaking pressure generated by transportation bumps and the secondary high temperature impact during consumer microwave reheating pose multiple challenges to the sealing strength. This is not just a simple packaging problem, but a systems engineering involving thermodynamics, materials science, and logistics safety. 

Professional solutions come from precision designed composite structures. The outermost layer should be made of puncture resistant material that can be printed in high definition, which can not only showcase the brand's visual appeal but also resist transportation pressure. The core must be an aluminum foil barrier layer, which is a key line of defense against the infiltration of oxygen, moisture, and odors, ensuring that the unique flavor of crayfish is not lost while preventing cross contamination in the refrigerator environment. The heat sealing layer that comes into direct contact with food needs to be specially customized, and special polymer materials that are resistant to high temperatures and oils must be selected to ensure that they do not soften or leak at the moment of contact with hot soup, and remain flexible and not brittle even after freezing. The layers are precisely compounded with food grade adhesive to form synergistic protection. 

Successful customization begins with precise measurement - the diameter, angle, curvature, and even microscopic unevenness of the container mouth edge need to be accurately recorded, with an error controlled within 0.3 millimeters. For different box shapes such as square, circular, and irregular, specialized molds must be developed to ensure complete edge fit. A complete filling simulation test should be conducted before production to verify the performance of the entire process from 95 ℃ hot filling to -18 ℃ freezing and then to microwave reheating. It is recommended to install an online leak detection system on the production line to monitor the sealing integrity in real-time. Although the cost of a single sheet of professional customized film is slightly higher, it can control the leakage rate below 0.5%, reduce related customer complaints by more than 50%, and extend the product shelf life. The comprehensive benefits are significantly better than those of general products. 

Leadtra Packaging is a wholesale and customized manufacturer of aluminum foil sealing film, specializing in the research and development, production of various high barrier packaging materials and easy to tear sealing packaging materials. We can provide one-stop services from consultation, design, sampling, production, testing, after-sales service, etc. If you are interested in or have any questions about us, please feel free to call us for consultation.