Side Gusset Coffee Bags

Measuring 6.97 x 4.49 x 19.02 inches, 5 lb side gusset coffee bags seat up to 2.27kg of roasted whole beans in MET-PET Mylar film. Side-gusset construction expands laterally under filling pressure, forming a rigid block-bottom profile that stands upright on retail shelves and warehouse pallets.

• 1 lb Side Gusset Bags: Standard retail size featuring an integrated tin-tie closure for repeated opening and re-rolling.
• 5 lb Large Format Bags: Bulk roaster size with an integrated one-way degassing valve and wide-mouth opening for rapid filling line operations.

Internal gas pressure flexes the rubber valve diaphragm open, venting off-gassing carbon dioxide out of the sealed bag cavity. Freshly roasted whole-bean coffee releases high volumes of gas during the initial 48 hours post-roast. The mechanical one-way valve allows this internal pressure to escape before it bloats or bursts the sealed pouch seams.

As internal pressure drops, external atmospheric pressure forces the rubber membrane back flat against the valve seat. This air-tight seal prevents ambient oxygen from entering the pouch, stopping essential coffee oils from oxidizing and losing aroma profiles during storage.

Automated friction feeders index flat side-gusset bags under thermal-transfer labeling heads to stamp roast dates and batch numbers before filling. High-tack acrylic adhesives bond pressure-sensitive labels flat across metallized PET films without corner peeling or edge-flagging. Apply strain graphics inline using our In-House Label Application Service Page.

Direct impulse sealing jaws weld the inner LLDPE liner at 310 degrees F to 340 degrees F with 2.0 seconds of dwell time. Thermal sealing across the top opening fuses all four layers where the side gussets fold inward, forming a hermetic barrier above the degassing valve. Order custom printed barrier films on our Custom Printed Wholesale Mylar Bags Page.

Filling the wide-mouth opening flexes the side gussets outward, forming a rectangular flat-bottom base that seats upright on retail shelves. Before filling, the unfilled bags lay 100% flat inside corrugated master cartons, packing tightly to maximize cubic shipping density and minimize freight tare weight.

• Flat Shipping Profile: Unfilled side-gusset pouches nest tight in master boxes to lower inbound LTL shipping costs per unit.
• Upright Shelf Display: Expanded gussets provide a wide front face for high-impact branding and roast profile visibility.