What is recovery of knitted fabric? Elongation of knitted fabric

 Recovery of knitted fabric:

Welcome to visit our blog. 
Hope you are well today. Today in this blog I am going to discuss the recovery of knitted fabric. Recovery of knitted fabric is most important. There are many different test methods to find out the recovery of a knitted fabric. The process follows the instruments and calculations relevant to the result. During testing should carefully take the reading to get the actual result. 

It means the % of recovered length respective to its total expansion.

Suppose we take a sample and Mark there 5"
After using 1 kg weight we got 10".
So total expansion is= 10"-5"
                                      =5"
After 1  minute relax the length is 6".8
That means the recovered length=10"-6"
=4"
Recovery %=(recovered length×100)÷Total expansion.
So recovery%=(4"×100)÷5
=80%

RECOVERY %= 80%

You can see the picture and understand it easily.



What is elongation:
Dear viewers, hope that you are well everybody. Welcome to visit my blog with patience. Today in this blog I am going to discuss the elongation of fabric. There are various types of fabrics in textiles. But today I will discuss knitted fabric elongation calculation. 

Elongation: Extensions percentage expression with respect to its initial length is called elongation.
Elongation requirement varies from buyer to buyer. Some buyer wants 85% some are 90%. 
But 85% is not bad for any sample. But above 85% is very good. 


Suppose that,
We take a fabric and  Mark 5".
This is the initial length.

After that, if we apply 1 kg weight to one side and hang it then the fabric will expand. The expansion percentage is called elongation. 
Suppose that after hanging 1 kg weight it becomes 10" from 5". Then what's the elongation? 
So elongation %={(10"-5")×100}/5
=100%

How to increase the elongation of knitted fabric: To increase the elongation of knitted fabric we need to follow the below points. 

1. We can change the machine gauge to increase elongation. 
2. We can change to stitch length 
3. We can use highly twisted yarn to increase elongation than the lower twist of the yarn. 
4. By increasing the denier of the spandex and fineness of the base yarn. 

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