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Methods of Fabric Coating April 22, 2015 10:37

Coating is a widely used method by many men and women clothing and manufacturers around the globe to change and enhance the physical appearance or characteristics of a fabric. It is conducted by covering fabric such as nylon, cotton, wool, polyester etc. with a product like PU, PVC or silicon. By undergoing coating process, fabrics show durability, resistance to normal wear and tear and many other features, which are not associated with its original form.

Following are the methods accepted commonly for coating by clothing manufacturers India and around the world.

 

  • Direct Coating:

In this method, a fabric or textile or a particular type is directly coated with any of the coating agent such as PU, Poly Vinyl Chloride or Silicon. The agent is applied in four layers on to the fabric that is undergoing the coating process. It is the simplest form of coating and can be done on any kind of fabric depending upon its reaction to the coating agent used in the process.

Fabrics that can be stretched can be coated with direct coating method and this method can help produce really weightless materials.

  • Transfer Coating: 

In this method, the polymer is spread on to a release paper in the first place and then the release paper is laminated onto the fabric and then removed. Waterproof fabrics can be produced easily with this type of coating. There are three main stages in this type of coating.

  1. The resin is coated on the transfer paper and the solvent is then evaporated.
  2. The fabric is then placed on the transfer paper and further remains of the solvent are then completely evaporated.
  3. The coated fabric is then peeled off the transfer paper to get the coated fabric separate.
  • Foamed and Crushed Foam Coating: 
This type of coating is generally used to apply polymer onto fabrics that are knitted or woven on any other fabric, which cannot be processed with a direct coating method. In this method, treated foam is applied on the fabric to get the desired result. Here, the bonding of the polymer with the fabric is controlled thus producing material that is soft and better draped.
  • Calender Coating: 
Calenders comprise of numerous large rollers that rotate to squeeze compounded polymer called 'dough' to make it of equal thickness. The thickness off the film is decided by the empty space between the rollers. Some rollers also produce heat and the material is attached to an uninterrupted sheet which can be made in contact with fabric to get coated.
  • Rotary Screen Coating: 
Mainly used for textile printing, in this type of printing the fabric is forced through a cylindrical screen to get the fabric coated with the desired coating agent. This method is also useful when polymer needs to be coated onto a fabric with specific requirements. This method can be used in foam processing of textiles instead of padding.
Any of these methods can be followed according to the type of the fabric requirement or the financial feasibility of the manufacturer around the world.
Any of these methods can be followed according to the type of the fabric requirement or the financial feasibility of the manufacturer around the world.