For freshly roasted coffee beans, one-way degassing valve bags are recommended.  For short-term storage or ground coffee, standard sealed bags may be used.  The selection primarily depends on the freshness of the coffee beans, intended storage duration, and specific application context.

I. Core Difference: Designed to Address the Degassing Requirements of Coffee Beans

One-way degassing valve bag: Its primary function is to release carbon dioxide emitted by freshly roasted coffee beans while preventing ingress of external oxygen.  Freshly roasted beans—particularly those that are lightly to medium-roasted—continue to off-gas for 1 to 3 weeks post-roasting.  Dark-roasted beans release gas more rapidly but in smaller quantities.  The integrated valve prevents package bloating or rupture and helps preserve aromatic compounds.

Standard sealed bags: These provide basic airtight sealing without any gas-release mechanism.  They are suitable for pre-degassed beans or ground coffee, minimizing oxidation due to repeated opening and closing.

II.  Key Selection Criteria

Bean freshness: Coffee beans roasted within the past month must be packaged in one-way degassing valve bags;  otherwise, accumulated carbon dioxide may compromise packaging integrity and accelerate flavor degradation.

Storage duration: For beans intended for storage exceeding three months, high-barrier standard sealed bags (e.g., BOPP/VMPET/PE composite structures with an oxygen permeability rate of 1.6 mL/m²·24hr) are appropriate.  When combined with nitrogen flushing, shelf life can be significantly extended.

Product form: Whole beans are best preserved in one-way degassing valve bags.  Ground coffee, which emits minimal gas but is highly susceptible to oxidation, should be stored in standard sealed bags with resealable zippers to facilitate multiple uses while maintaining freshness.

III.  Practical Recommendations

For marketing freshly roasted coffee, brands should opt for laminated film bags equipped with one-way degassing valves (e.g., PA/EVOH/PE structure), capable of maintaining oxygen transmission rates below 1 mL/(m²·24h·atm), thereby enhancing aroma retention to over 95%.

Small-scale roasters and cafés: When placing small-volume custom orders, selection can be tailored to consumption cycles.  If inventory is consumed within one week, standard sealed bags offer a cost-effective solution.  However, for longer holding periods, priority should be given to degassing valve bags to ensure quality preservation.