Desizing of cotton

Cotton fabric in its loom-state contains impurities and requires further treatment to be ready for the dyeing step. Traditional cotton cleaning and preparation involve then the use of several chemical agents to remove the size on the surface of the fibre.

Grinp developed a sustainable desizing process that reduces drastically the amount of water and chemicals needed to remove the size from the fibre.

Grinp desizing process is composed of three main steps:

    1. Plasma functionalization: this phase is a plasma treatment made with Grinp PLAtex plasma machine that allows to functionalize the fabric to make it receptive to the following impregnation. PLAtex process is 100% dry and plays a key role in ensuring the sustainability of the process.

    2. Cavitational impregnation: this phase represents the impregnation of the fabric in the desizing solution using Grinp UltraFoulard module. The sonotrodes that compose the UltraFoulard allow the deepest impregnation of the fabric, reaching the inner part of the fibre. Thanks to the proprietary recipe developed by Grinp the fabric is desized and purged at once.

    3. Cavitational washing: the last part of the process is represented by the cavitational washing in Grinp UltraWashing module. The ultrasound technology of this innovative module allows a deep cleaning of the fibre, stimulating water movement inside the fibre to guarantee full cleaning using a low quantity of water.

Key characteristics:

  • The process includes the purge of cotton.

  • Grinp process is innovative and sustainable because it allows to save up to 80% of water and energy.

  • The process is continuous and does not require any rotary stocking: the result is shorter process time and no room needed for stocking.

  • Water consumption is extremely low and the washing is included in the process. There is no need to wash the fabric after Grinp desizing line.

  • The desizing machine can be equipped with a zero water unit for the complete recycling of water.

Main advantages of Grinp desizing process:

  • No rotary stocking

  • Low water consumption (80% lower than traditional)

  • Low energy consumption (80% lower than traditional)

  • Includes purge

  • Continuous line

  • No stocking time

  • No washing needed after desizing line

  • No hot water needed