Query Related To Leather

What kind of stitch constructions are applied for soft flexible footwear?

Ans. A wide variety of Direct Sole to Upper Stitch constructions are now available. With today's demand for flexible footwear these methods of sole attachments will continue into future seasons.

Popular constructions are : Side wall stitched, Veldtschoen, Opanke, Polyveldt, San Crispino, Moccassin, corner stitched.

Each of these constructions has different features although as a general guide:

-Ensure the upper is shaped and a suitable fit for the sole unit.
-Sole units should have adequate stitch tear strength ( 25N/mm minimum )
-Where design allows, stitching should be set in grooves or channels to give added protection against abrasion.
-Use bonded nylon or polyester threads.
-Stitching should be lock-stitched ( chain stitching is not recommended ).
-The thickness of the wall in the stiching area should be a minimum tear strength of 3mm.
-Reinforce uppers where necessary to achieve a minimum tear strength of 100 N.
-Use good quality soling materials.