Processes

Main Processes

Waterless bleaching of cotton woven fabric

Grinp developed a breakthrough process for the waterless bleaching of cotton woven fabric.

The process allows to save water, save chemicals, save energy, save space and save costs.

Grinp waterless bleaching process combines several technological innovations to produce highly performant bleached Gotton®. Discover Gotton® in the next section!

Grinp industrial waterless bleaching process includes plasma functionalization, cavitational impregnation, plasma steam reaction and cavitational neutrawashing.

If the fabric is not already desized, it can be desized in the bleaching process adding the desizing module.

The output of the process is wet Ready For Dyeing (RFD) fabric, produced using just 2-3 liters per kg of cotton!

Grinp waterless bleaching machine can work in close loop thanks to a super efficient water management system that continuously purify water and reintroduces it in the cycle.

Start now being finally really sustainable!

Waterless bleaching of cotton terry towel

Grinp waterless bleaching process can also be applied to cotton terry towel.

The process allows to save a huge quantity of water, save chemicals, save energy, save space and save costs.

Grinp waterless towel bleaching process combines several technological innovations to produce highly performant bleached Gotton®.

The waterless towel bleaching process includes cavitational impregnation, plasma steam reaction and cavitational neutrawashing.

The output of the process i RFD Ready For Dyeing towel, produced using just 3-4 liters per kg of cotton!

Grinp waterless towel bleaching machine can work in close loop thanks to a super efficient water management system that continuously purify water and reintroduces it in the cycle.

Start now being finally really sustainable!

Discover

GOTTON®


Gotton® is the exclusive output of Grinp Bleaching Processes.

Gotton® is cotton fabric or towel:

1) white;

2) super hydrophilic;

3) ultra soft;

4) with high dyeing affinity.

When dyed with reactive dyes, Gotton can get up to 5-30% darker than traditionally bleached towel/fabric.


Processes phases

Cotton Desizing

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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 different chemical agents to remove the size on the surface of the fibre.


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


The process is possible thanks to the combination of Grinp cavitational impregnarion unit and Grinp cavitational Washing Unit.

This combined system replaces traditional purge of cotton making the preparation quick and sustainable.


Grinp waterless desizing main advatages are:

  • low water consumption;

  • no hazardous chemicals;

  • compact design;

  • easy integration in bleaching line;

  • low operating costs.

Plasma technlogy and plasma processes have been the core competence of Grinp for over 15 years.

Plasma Functionalization of cotton

Grinp plasma machine, named PLAtex fun, 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 incredibely receptive to impregnation, lowering the amount of chemicas needed to meet the desired goal.

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

PLAtex fun processes are totally dry, not a single drop of water is required for the process

Plasma Scouring of polyester

Grinp plasma machine, named PLAtex Scour, cleans plyester fabric from spinning oils.

Using a specific combination of gases and power plasma breaks oil molecules into smaller parts, reducing their boiling point.

After plasma treatment the oil still on the fabric has a very low boiling point and it is also hydrolyzed.

Hydrolyzed oil is easy to remove with a simple water washing or evapoured during the fabric stabilization phase.


PLAtex Scour processes is totally dry, not a single drop of water is required for the process of PLAtex Scour.

Plasma Steam Reaction process

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 highlyreactive hydroxyl radicals (·OH). These reactive species are the strongestoxidants 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. Theprecise 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 thereaction chamber.


Plasma Steam Reaction process plays a key role in the waterless bleaching process thanks to the penertation 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.

Cavitational Washing and Neutrawashing

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

The cavitational washing and neutrawashing are made possible by a series of sonotrodes that generate ultrasounds and continuous nucleation.


The ultrasounds technology combined with a bubble jet system that creates high turbolence, allows a super efficient volumetric mass transfer.

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 authomatically created and destroyed, creating local micro energy spots on the fibre.


Traditional washing systems only use water movement and clean the fabric superficially, Grinp Cavitational Washing and Neutrawashing, thanks to the described ultrasounds technology, are 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 to reduce 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 Cavitational Washing and Neutrawashing able to clean the fabric 15-20% more deeply than traditional water washing.

Grinp Cavitational Washing uses from 2 to 4 liters of water per kg of fabric for simple washing.

Grinp Cavitational Neutrawashing thanks to its precise combination of water and basic chemicals neutralizes the fabric/towel after the plasma steam process to make it ready for dyeing (RFD)

Close Loop water management

The majority of Grinp processes doesn't require any water, but some of them like washing, neutrawashing, desizing and bleaching require a small amount of water or other liquids.

Grinp Close Loop water management process collects those liquids and thanks to the combinationation of several technologies, completes their purification quickly and efficiently to reuse them in the processes.

The Close Loop Water managemtne avoids the production of any waste water, introducing real sustainability in the textile industry.