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Pre-shrinking finish on fabrics

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Pre-shrinking finish on fabrics

  • Categories:Industry news
  • Author:
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  • Time of issue:2017-11-13

Pre-shrinking finish on fabrics

Pre-shirking is needed almost on all fabrics because most textile materials shrink when washed. However preshrinking can only reduce the residual shrinkage to a lower percentage, but cannot completely eliminate it. On cotton fabrics, usually take away 8-10%shrinkage by preshrinking, leaving about 5-6% in them.
 
Preshrinking can reduce only the residual shrinkage
 
This is a generalized form of opinion which clearly indicates that without proper shrinking, these fabrics truly cannot be used to make garments. In fact preshrinking can only reduce the residual shrinkage to a lower percentage, but cannot completely eliminate it. Following are the measures one must take about the balance of residual shrinkage:
 
On cotton fabrics, we can usually take away 8-10 %shrinkage by preshrinking, leaving about 5 - 6% in them. If you really do a good job on shrinking, you may bring it down to 4% which is generally accepted in the trade.
 
Shrinkages of various fabrics from grey goods
 
Kind of Fabric Total Shrinkage (in %)
Cotton Twill 12-16
Cotton Denim 12-16
Cotton Canvas 10-14
TC fabric 4-6
 
Sanforization
 
Shrinkage in garments is very important issue because when they shrink out of size, they cannot be worn. Before pre-washed garments became popular, the shrinkage problem was even a bigger one. To tackle the shrinkage problem, a process to pre-shrink fabrics before making garments was invented by an American, Stanford L.Cluett. He registered a trademark "SANFORIZED" to signify that the fabric used in garment has gone through a registered process and the garment is shrinkage controlled (Residual shrinkage about 1%). He advertised the trademark "SANFORIZED" to build up the demand from the consumer level for "Sanforized" garments so that the textile mills and garment makers want to use the Sanforize process and the trademark "sanforized" on the garment label to make the merchandise more appealing to consumers. Of course a royalty has to be paid to the Sanforize Company for the use of the trademark.
 
Resin Finish
 
Resin finish is to stabilize the fiber to make it shrinkage and crease resistant. We usually consider applying resin finish on 100% cotton fabrics (mostly knits) or 100%rayon woven fabrics because shrinkage of these 2 kinds of fabrics is hard to control, and therefore we consider to resort to resin finish.
 
Resin finish is not too popular now days because the resin applied will eventually be washed off. Garment buyers therefore, rather use garment wash to get rid of the shrinkage and at the same time get a washed look on the garment which is desirable.

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