3D Flexible Pouch Oblique Seam Design for Biopharmaceutical Fluids
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Solution Overview
Problem
The production of 3D flexible pouches for biopharmaceutical products is hindered by complex and costly K-shaped welded seams, which are fragile and prone to torsion stresses during filling and transportation, necessitating a more robust and simplified design.
Innovation Solution
A 3D flexible pouch design featuring oblique edges and a triangular join portion that reduces torsion stresses and simplifies production by eliminating transverse seams, with gussets folded inward to create a robust, flexible structure suitable for large volume biopharmaceutical storage and transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If K-shaped welded seams are used in 3D flexible pouches, then the pouch can be formed with gussets for volume expansion, but the welded seams become fragile and prone to torsion stresses during filling and transportation
Solution Approach 1:
The pouch structure is divided into separate components: gussets are detached from the main body walls and connected only at corner regions. This segmentation allows the gussets to expand independently for volume increase while the main body walls maintain structural integrity and resist torsion stresses during filling and transportation.
2Shape
If K-shaped welded seams with transverse seams are used, then the pouch structure is complete, but the production process becomes complex and costly
Solution Approach 1:
The transverse welded seams are extracted and removed from the design. Instead of creating complete K-shaped seams with transverse connections, the gussets are detached and connected only at corners, significantly simplifying the welding process and reducing production complexity while maintaining the necessary pouch structure.
3Reliability
If traditional welded seam design is used, then the pouch can be sealed, but the seams are susceptible to torsion stresses and potential rupture
Solution Approach 1:
The welded seam configuration transitions from symmetric K-shaped seams with transverse connections to an asymmetric arrangement where gussets are detached and connected only at corner regions. This asymmetric design eliminates the vulnerable transverse seam portions that are prone to torsion stresses, thereby improving resistance to mechanical failure while maintaining pouch integrity.
Data Source
AI summary
The invention relates to a 3D flexible pouch to be filled with a biopharmaceutical product, produced by assembling two wall elements and two gussets. At least one connection port can be provided for filling and/or emptying. A substantially parallelepipedic configuration is obtained in a filled state by unfolding the gussets and folding the flaps of the two wall elements. A welded seam is produced in a join portion formed at one end and cut out in a V shape, so as to directly connect the two wall elements. In a substantially flat configuration of the empty flexible pouch, the join portion projects axially outwards in relation to the gussets and is defined by two edges which are oblique in relation to a longitudinal axis of said pouch.