Seam

Seam

A Line along which two or more fabrics are joined by fusion, gluing, sewing, stapling, or alternative method is termed a seam. Usually near the edges of sewn fabric pieces.

Properties of the seam:

A. Seam Performance

B. Seam Appearance

A. Seam Performance

Performance means the achievement of the following factors
1. Seam Strength:
Seam strength should be lower or equal to fabric strength. If seam strength is higher than fabric strength, then fabric may be break due to unexpected force to the fabric.
Seam strength depends on :
Strength of thread used;
Unbalance stitch;
Stitch density;
Seam type;
Size of stitches;
2. Seam Elasticity:
Seam elasticity should be equal to or higher than fabric elasticity. Otherwise, a seam may be opened by breaking of sewn thread in the seam. Some fabrics or garments may be stretched of 100% or more. Seam elasticity varies if the fabric is knitted or woven.
3. Durability:
The durability of the seam should be equal to or higher than that of the fabric. A seam must be durable, long-lasting, and not abrade (scrape) or wear easily during everyday use of the garment including all necessary laundering.
4. Comfort:
The seams of the garments must be comfortable and do not create any problems while using.
5. Security:
Security is closely connected with durability. A seam needs to be secure and not to unravel or broke during the everyday use of the garment.
B. Seam Appearance

Seam appearance should be:

Satisfactory;
Defect free stitch;
Defect free seam;
Expected, i.e. no fold of fabric along the fabric;
Free from seam pucker;

Factors of Seam Properties:

The following are the factors of which seam properties depends on:

Seam Type: This is a particular configuration of fabric as required.
Stitch Type: It is the most important point which deals with a particular configuration of thread in the fabric.
Feed Mechanism of sewing machine: This is the mechanism by which the fabric moves past the needles and enables a succession of stitches to be formed.
Needle size and Type: The needle size and type should be chosen according to the seam properties required.
Thread size and Type: The thread size and type should be chosen according to the seam properties required, i.e. flame-proof, water-proof, etc.