What is seam elongation?
Seam elongation refers to the elasticity and stretching behaviour of a seam when subjected to tensile stress along the seam. It is primarily determined by the thread stock in the seam. This depends on the choice of stitch type, stitch density and stitch balance. The trend towards close-fitting and comfortable clothing requires a high level of manufacturing expertise with regard to stretchable materials in general and elastic seams in particular. AMANN has developed Sabaflex, a highly elastic sewing thread, for this purpose. The seam elongation can be tested in accordance with DIN EN ISO 13934-1 (simple strip method).
FAQ
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Seam elongation describes how much a seam can stretch under tensile stress along the seam direction.
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It is mainly influenced by the thread stock in the seam, which depends on stitch type, stitch density and stitch balance.
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Close-fitting and stretch garments require elastic seams to ensure comfort and durability.
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Yes. Different stitch types provide different levels of elasticity.
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Yes. Stitch density influences the amount of thread in the seam and therefore its stretch behaviour.
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Yes. Highly elastic sewing threads can significantly increase seam elongation.
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Seam elongation can be tested according to DIN EN ISO 13934-1 using the strip method.