Flexible Container Closure TRIZ Cases

See how a welded sealing film with a guiding pocket prevents leakage during straw insertion and

A welded pocket around the straw opening guides puncture, prevents leakage, and reduces opposite-side piercing in drink pouches.

A protective cage inside an IBC liner bag valve stops the bag wall blocking the outlet, enabling continuous, low-cost discharge.

A split-film adhesive and weakening-line layout gives paper shipping bags secure closure and clear tamper evidence after opening.

A convex easy-peel seal raises resistance at seal intersections, enabling controlled pouch opening while limiting spillage and surviving retorting.

A movable gas connector feeds pressure into the space between nested containers, improving beverage flow without gas contact.

Individual reclosure segments cut material waste in vertical bag wrapping while preserving seal quality and consistent seal thickness.

Constrictable tubular lengths and adjustable lines retain selected waist sizes while avoiding belts, hooks, clips, and added bulk.

A regulator bag inside a vacuum membrane controls foam blank deformation speed, preventing cracks caused by rapid forming.

Segmented elastic links create secondary and tertiary loops that ensure complete closure while simplifying the welding process.

Attaching a self-mating zipper profile to the flat unfolded carton simplifies manufacturing by reducing folds and construction complexity.

A bag knot structure uses a pre-configured wire to form loops and a grip for secure closure.

A mailing bag packaging system measures product dimensions and cuts material to size for automated variable-size wrapping.

Die cut release members expose pre-applied adhesive on inner layers, resolving manufacturing complexity while maintaining package integrity.

A preformed packaging bag employs a folded lip to shield an adhesive strip, preventing surface soiling that compromises hermetic sealing reliability.

A plastic shipping bag uses segmented weakened areas to enable controlled tearing along perforation lines for easy opening without tools.

Segmented sheets use folded adhesive barriers to withstand high pressure differences without aggressive glues or complex manufacturing.

Auxiliary port design overcomes volume filling constraints by separating filling access from structural sealing functions.

Multilayer flexible bag with impermeable zip seal resolves airtightness trade-off in biodegradable coffin design.

Peripheral perforations on the bag web engage guide means to prevent axial slipping and level deviation, ensuring reliable edge alignment during rapid filling.

Parallel deformable rods maintain a thermal pouch shape to grip body contours, eliminating strap reliance for secure attachment.

Self-sealing adhesive strips engage upon closure to prevent unauthorized access and provide visible evidence of tampering in delivery packaging.