Choosing the appropriate sealing film for coffee powder (especially for hanging ear coffee, bagged coffee powder, etc.) is a very professional and important issue, which directly affects the preservation effect, user experience, and brand image of the product. 

The following is a list of core issues related to "coffee powder sealing film", divided into several categories for your reference when choosing: 

1. Oxygen barrier properties (most crucial!)

The "number one killer" of coffee powder flavor is oxygen. Is the oxygen permeability of the sealing film (especially the aluminum foil layer in multi-layer composite films) low enough? Can it effectively delay the oxidation of coffee powder and maintain its flavor and aroma? 

2. Water vapor barrier properties

Coffee powder is also afraid of moisture. Can the sealing film effectively prevent external moisture from entering, prevent coffee powder from getting damp, clumping, and deteriorating? 

3. Odor barrier and fragrance retention

Can external odors be prevented from entering? At the same time, can the charming aroma of the coffee powder itself be firmly locked in ("locking aroma" function)? 

4. Sealing strength and sealing performance

Is the heat sealing layer firmly combined with the packaging bag? Will there be any breakage or leakage during transportation or compression? Will there be a "slow air leakage" phenomenon that leads to premature failure? 

5. Tearability

Can users easily and neatly tear off the opening film of ready to use products such as hanging ear coffee? Is the tear edge sharp or easy to cut? Is there too much residue left after tearing? 

6. Peel off effect

After tearing, is the sealing film completely peeled off, or is there a layer of backing paper left for subsequent resealing? This depends on the product design (such as the sealing film of some coffee cans). 

Leadtra Packaging is a professional manufacturer and global service provider of aluminum foil sealing film, providing one-stop services for sealing film, sealing gasket products and solutions. We are stationed in the factory for debugging, solving your sealing problems, and ensuring your production cycle. If you are interested in or have any questions about us, please feel free to call us for consultation.