Ⅰ.Basic Materials
| Material Type | Core Advantages | Suitable Applications | Limitations |
| Kraft Paper | Natural texture/Biodegradable/Low cost | Specialty coffee beans/Pour-over coffee | Weak moisture resistance requires lamination |
| Aluminum Foil Composite Film | Ultimate light blocking/High barrier properties | Dark roast beans/Specialty drip bags | Higher cost/Not microwave-safe |
| PET Aluminized Film | Metallic Finish/Printability | Cold Brew Concentrates/Nitrogen Flushing | Complex Recycling Process |
| PLA Bioplastic | Carbon-neutral certification/Industrial compost degradation | Premium organic coffee/Eco-friendly brands | Lower temperature tolerance than conventional plastics |
| One-Way Valve Bags | Gas management/Extended shelf life | Freshly ground coffee beans/Bean aging packaging | Requires specialized heat-sealing equipment |
Ⅱ.Innovative Material Composites
1.Three-layer composite structure
PE + aluminum foil + PET combination achieves oxygen transmission rate <0.005 cc/m²/day
2.Nano-coating technology
Depositing a silica nano-layer on paper surfaces reduces humidity sensitivity by 60%
3.Recyclable packaging system
Utilizes weather-resistant TPU material that maintains seal integrity after 50 cycles of cleaning and disinfection
III. The Functional Design
Unidirectional Exhaust Valve
Precision Pressure Control: 0.5-1.2 kPa opening pressure balance
Selective Gas Permeation: CO₂ expulsion rate 12 times faster than O₂ infiltration
Lifetime Testing: Maintains 98% seal integrity after 500 open-close cycles
1.Gas Replacement Technology
Nitrogen Filling: Residual oxygen <0.5%
Argon Mixing: Inhibits lipid oxidation reactions
Gas Monitoring Chip: Real-time display of internal gas composition
2.Advanced Preservation Technologies
Humidity Control Pack: Built-in mineral desiccant + humidity indicator card maintains optimal storage environment at 55%-60% RH
UV Barrier Layer: Utilizes nano-titanium dioxide particles with UV-B blocking rate >99.7%
Smart Oxygen Sensor: Color-changing indicator alerts consumers to optimal consumption window
Wanle Package specializes in producing various high-quality coffee packaging bags. Contact us now to enjoy excellent service and customized solutions!