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Grinp developed an innovative impregnation system capable of transferring chemicals onto the fibre extremely quickly and homogeneously.

The UltraFoulard is composed by a series of sonotrodes that generate ultrasounds and continuous nucleation on the fibre.

Nucleation is the process that represents the creation of microbubbles that are continuously and automatically created and destroyed, creating local micro energy spots on the fibre. Such energy spots create a quick and deep penetration of chemicals in the inner part of the fibre, increasing local energy without increasing significantly the temperature of the process.

Nucleation allows energy savings replacing traditional energy supply with a natural physical phenomenon that autonomously generates the energy needed to speed up and improve impregnation.

The ultrasounds technology increases significantly the exchange between the liquid and the fibre, forcing mass transfer and improving penetration and uniformity across fabric width.

Extremely rapid and deep penetration and full width uniformity are unique characteristics of Grinp UltraFoulard Impregnation guaranteed by the ultrasound technology in the cavitational system.


Grinp developed an innovative washing system capable of cleaning the fibre more efficiently than traditional water washing systems, using a considerably lower amount of water.

The UltraWashing unit is composed by a series of sonotrodes that generate ultrasounds and continuous nucleation.

The ultrasounds technology combined with a bubble jet system that creates high turbulence, allows a super efficient volumetric mass transfer. The extreme innovative power of Grinp cavitational washing resides in the ability of the system to create an efficient movement of water around and mostly inside the fibre.

The bubble jet technology creates a forced movement of water in contact with the surface of fabric, while the sonotrodes generate continuous nucleation. Nucleation is the process that represents the creation of microbubbles that are continuously and automatically created and destroyed, creating local micro energy spots on the fibre.

Traditional washing systems only use water movement and clean the fabric superficially, Grinp Ultra Washing thanks to the described ultrasounds technology, is able to clean the fibre from the inside, creating water movement also in the inner part of the fibre for a definitely deeper cleaning.

The ability to generate such water movement inside the fibre, allows reducing drastically the amount of water needed to obtain the desired cleanliness level.

The combination of deep-water movement, volumetric mass transfer and microspotted energy make Grinp UltraWashing able to clean the fabric 15-20% more deeply than traditional water washing.

PLAtex (cold atmospheric plasma)

Plasma technlogy has been the core competence of Grinp for over 15 years.

Grinp plasma is the only plasma technology availabe in industrial scale, able to treat textiles up to 4 meters wide.

PLAtex functionalization

Grinp plasma machine plays a key role in Grinp textile processes: it prepares the fibre for the steps that follow.

PLAtex functionalizes the fabric using a specific combination of gases and power that make the fibre receptive to the chemicals used in the Cavitational Impregnation Unit.

The functionalization of the fibre makes it hydrophilic and incredibly receptive to impregnation, lowering the amount of chemicals needed to meet the desired goal.

Thinking about cotton bleaching, PLAtex allows to run a process with a derisory quantity of chemicals, reducing fibre weakening, chemicals consumption and water for subsequent washings.

PLAtex machine is compact and modular, self-cleaning and eco-friendly.

PLAtex processes are 100% dry, not a single drop of water is required for the functionalization process!

Plasma Steamer

Grinp developed a cutting-edge plasma steamer that combines ionizing radiation (plasma) and vapour to stimulate the creation of radicals inside the fibre.

The innovative Plasma Steamer Unit, relies on in-situ production of highly reactive hydroxyl radicals (·OH). These reactive species are the strongest oxidants that can be applied in water and can oxidize virtually any compound present, at a diffusion-controlled reaction speed.

Hydroxyl radicals are produced with the help of plasma, a primary oxidant. The precise combination of steam and ionizing radiation are applied in order to obtain a maximum •OH yield.

Plasma Steamer Unit includes a vapour distribution system at the top of the chamber, that guarantees uniformity of density and temperature all over the reaction chamber.

Grinp Plasma Steamer Unit plays a key role in the bleaching process thanks to the penetration of radicals all the way to the inner part of the fibre.

It allows an incredibly fast and efficient reaction of the bleaching solution allowing to obtain high whiteness without weakening the fibre.

This innovative technology and process have countless benefits that also include the realization of Gotton, cotton fabric with a much higher dye absorption during dyeing process.

The Plasma Steamer Unit is compact and modular, easily manageable through the touch screen Operating Panel of the Siemens PLC. The PSU can be used to treat both cotton woven fabric and cotton terry fabric.

It is usually part of a bleaching/Gotton line composed by UltraFoulard, PlasmaSteamer and UltraWashing.

Zero Water Unit

The latest innovation under development in Grinp laboratories concerns water circular use, allowing the cotton preparation systems to run without any wastewater.

Grinp Zero Water Unit, combines several technologies to take advantage of the interaction of different cleaning methods, with the aim of cleaning the water like no other existing technology.

Zero Water Unit collects residual chemicals and water from all the units that compose the cotton preparation system and mixes them up, triggering a chemical reaction among them.

Zero Water Unit first step is a fenton process, an Advanced Oxidation generated by UV light and Ozone. The Advanced Oxidation Process is enhanced by ultrasounds emitted by two series of sonotrodes. The second step of the cleaning process is the combination microfiltration and reverse osmosis.

The result of the process is clean water to be reintroduced in the system.

Using the Zero Water Unit, no wastewater or waste chemicals are generated by the cotton/Gotton preparation system.

All Grinp industrial machines are modular and available in 2 sizes:

  • 2 meters machines treat textiles up to 180cm wide

  • 4 meters machines treat textiles up to 380cm wide.

Process speed can be increased according to client's needs adding several modules.

Download PDF below

Grinp Textile Machinery.pdf