Customization of easy to tear inner film requires a balance between sealing reliability and easy opening. The key is to precisely control the tearing force, which directly depends on the material structure and processing technology.

Choosing the appropriate heat sealing material is the primary task, which needs to match the material characteristics of the packaging container to ensure a secure seal. At the same time, it is necessary to determine the design form of the tear opening, such as underlined, dotted or full tear, which affects the consumer's opening experience. 

The ideal easy to tear inner film usually adopts a three-layer structure: the outer layer provides strength and printing performance; The middle aluminum foil layer ensures barrier effect; The inner heat sealing material needs to have precisely controlled tearing performance. The material thickness needs to balance flexibility and stiffness. If it is too thin, it is prone to deformation, while if it is too thick, it is difficult to open. The recommended thickness of aluminum foil is between 7-9 microns, which ensures good barrier properties while maintaining good tear resistance. 

Before customization, it is necessary to understand the production line conditions, including filling temperature, sealing equipment model, production line speed and other parameters. These factors directly affect the heat sealing performance and opening effect of the inner membrane. Suggest providing container samples for on-site testing to ensure a perfect match between the inner membrane and the container mouth. The dimensional accuracy requirements are strict, and the error usually needs to be controlled within ± 0.2 millimeters. 

Multiple tests must be conducted before formal production: tear force test to ensure moderate opening force; Sealing test to verify the integrity of the seal; Tolerance testing simulates transportation and storage environments. Suggest conducting small-scale trial production to test the performance of the inner membrane under actual production conditions. A comprehensive testing process can effectively avoid quality issues during large-scale production. 

Leadtra Packaging is a wholesale and customized manufacturer of aluminum foil sealing film, specializing in the research and development and production of various high barrier packaging materials and easy to tear sealing packaging materials. They are widely used in food, medicine, cosmetics, and daily necessities packaging, and have many advantages such as green environmental protection, high safety, strict testing, and stable quality. If you are interested in or have any questions about us, please feel free to call us for consultation.