The glued bond sounds like it is not allowing transfer of
force equally along the bond in the direction of the force.
Similar consideration is needed in sewing fabric.
The direction of the seams, the length of stitch, the characteristics
of the thread, the number of rows of stitching, and the
stitch pattern, can also make a difference on seam strengths.
For example, using a stretchy thread could transfer more
force over a greater area, increasing seam strength.
Polyester thread has low stretch characteristics.