11 Properties of Sewing Thread

11 Properties of Sewing Thread:

Sewing thread is an important trimming that is vastly used in the readymade garments sector. The sewing thread contains some properties. In the past, I have presented here the relation between sewing thread, needle, and material but today I have explained here the different properties of sewing thread.

Sewing Thread

Sewing Thread

Characteristics of Sewing Thread:

There are different key properties of sewing thread which are mentioned in the following:

  1. Tensile strength,
  2. Tenacity,
  3. Loop strength,
  4. Loop strength ratio,
  5. Minimum loop strength,
  6. Elongation at break,
  7. Stress-strain curve,
  8. Elasticity,
  9. Shrinkage,
  10. Abrasion resistance,
  11. Colorfastness.

All the above properties have explained the below:

1. Tensile strength:

The minimum load which is needed to break the sewing thread is termed as the tensile strength of that thread. It is expressed by gm, kg, or lbs which may vary according to the temperature and humidity. It is used to determine the difference in tensile strength of sewing threads of the same size or ticket number.

2. Tenacity:

The ratio of tensile strength and thickness or count of sewing thread is known as tenacity. The strength and quality of various count threads are verified by tenacity. Tenacity is denoted by gm per tex or gm per denier in the textile and apparel industry.

3. Loop strength:

Thread has minimum strength in its loop position and the minimum load needed to break the loop is termed as loop strength. It is deeply related to the stitching strength of a thread.

4. Loop strength ratio:

The ratio of sewing thread tenacity and loop strength of that thread is termed as loop strength ratio. It should be noted here that, the maximum value of the loop strength ratio maybe 2. The Loop strength ratio is used to find out the efficiency of sewing thread in the stitch.

5. Minimum loop strength:

The loop strength of the weaker loop is termed as minimum loop strength. It is used to determine the performance of sewing thread in the stitch.

6. Elongation at break:

Elongation at break is the extension of sewing thread at breaking point. It is expressed in percentage. It is too much important for the extensibility of seam.

7. Stress-strain curve:

The stress-strain curve is the drawing curve of tenacity which opposes the elongation of the sewing thread. It has great importance to compare the values of two threads.

8. Elasticity:

Elasticity is the property using which the sewing thread returns to its original position when the deforming force is released. It should be noted here that when sewing thread back to its original position after the extension is called plastic. But if don’t back to its original position is called plastic. Most of the sewing threads are lie in the middle position of the elastic and plastic.

9. Shrinkage:

The dimensional change of sewing thread after washing with water or heat is called shrinkage. Shrinkage is expressed as a percentage. Due to the shrinkage of threads, seam pucker occurs.

10. Abrasion resistance:

Abrasion resistance is the frictional resistance of one sewing thread to another. It has great importance to determine the sewing performance of thread which is measured by using a special machine and method.

11. Colorfastness:

Colorfastness is a very important factor for the sewing thread. The color durability of sewing thread against sunlight and wash must be as like as garments.


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