Thickener

uses of printing thickeners in textile industry

1. WELCOME TO MY PRESENTATION Md. Saeid Ahmed ID: 142-23-3984

2. thickener

3. Introduction A thickening agent or thickener is a substance which can increase the viscosity of a liquid without substantially changing its other properties . Thickeners can be added to dye to give it a good consistency for painting. They are also popular in tie-dyeing for improving the crispness of a design. The use of a thickener may also increase the brightness of colors by aiding in holding the dye in the fabric for the dye reaction to occur.

4. Starch paste Starch paste is made from wheat starch, cold water, and olive oil, then thickened by boiling. Non-modified starch is applicable to all but strongly alkaline or strongly acid colours . Flour paste Flour paste is made in a similar way to starch paste; it is sometimes used to thicken aluminum and iron mordants . Starch paste resists of rice flour have been used for several centuries in Japan. Types of thickeners

5. Gum Arabic It is the original source of the sugars arabinose and ribose, both of which were first discovered and isolated from it . Gum arabic allows more precise control over washes, because it prevents them from flowing or bleeding beyond the brush stroke . In cosmetics, gum arabic functions as a stabilizer in lotions and protective creams, where it increases viscosity, imparts spreading properties, and provides a protective coating and a smooth feel. Guar gum for textile printing plays a major role in printing textiles. They are made of macromolecules and they are capable of absorbing water to create a sticky paste adding color value to the textile. Guar gum Types of thickeners

6. Gum tragacanth , or Dragon , which may be mixed in any proportion with starch or flour, is equally useful for pigment colours and mordant colours . Carboxy methyl tamarind is another textile thickener which is a derivative of polysaccharide and 20 % ash content and 9 % moisture content. It is multipurpose thickener that is helpful in numerous applications for different types of materials such as cotton or vat dying . British gum or  dextrin   is prepared by heating starch. It varies considerably in composition Types of thickeners

7. Albumen  is both a thickening and a fixing agent for insoluble pigments. Chrome yellow, vermilion and ultramarine are such pigments. Types of thickeners Alginate Sodium alginate is the most popular of the dye thickeners. Methyl cellulose is a thickener commonly used for marbling. The water is thickened with methyl cellulose so that it will support fabric paint which is floated on top of it. Methyl Cellulose Albumen

8. Types of thickeners Aquathick   It is our  Cold water  range of textile thickener. Aquathick is a special printing thickener having high viscosity, more bright color, and low consumption of powder, good penetration, high color yield and easily washable and soft handle. Printplus It is our  Hot water  range of textile thickener. Printplus which is a textile printing thickener derivatives of Tamarind & similar galactomannans .

9. Synthetic Thickeners Synthetic Thickening Agents for Pigment Printing Lutexal GP ECO   Lutexal F-CE   Synthetic Thickening Agents for Reactive Printing Lutexal F-RP  Merits and Demerits of Synthetic Thickener Merits No air pollution No risk of fire and explosion No special storage requirements No fabric smell Demerits Electrlyte sensitivity Slightly dull prints and harsh fabric feel Longer drying time

10. Viscosity of thickeners Thickening agents Viscosity mPa.s Cream 1860 Homogenized cream 1860 Carboxymethyl cellulose 90 Xanthan 144 Mushroom ( Galactomannan ) 352 Leek ( Galactomannan ) 273 Leek (starch) 140 Viscosity of water is 1.79 mPa.s Thickening agents Viscosity mPa.s Corn starch 950 B.U. Rice starch 650 B.U. Xanthan 144

11. Natural Thickeners Viscosity Of Different Thickeners 1. Aloe vera gel thickener

12. Viscosities of 1% solutions of various products at 25*C The viscosity of Cornstarch is observed 2000 cP at 26% concentration and 60*C Cassia T ora 3000-12000 cps Cassia Fistula Gum 1600 cps

13. Thickening agents Viscosity cP Maleic anhydriede 2500 Poly ethylene glycole 310 cP N - methylol acrylamide 1400 cP Acrylic acid 2750 cP Methylol acrylamide 1400 cP Stearyle methacrylate 7800 cP Ethyle acrylate 800 mPas Viscosity of thickeners The viscosity of a 1 % solution must lie between 10 and 15 mPa·s-1, or between 20 and 45 mPa·s-1 for a 2 % solution, or between 200 and 500 mPa·s-1 for a 4 % solution.

14. There are some instruments to measure the viscosity of thickeners : Glass capillary viscometer Lamb- lewis capillary viscometer Tube viscometer Coaxial rotational viscometer Cone and plate and parellel plate viscometers Barbender Viscograph is designed specially to measure the viscosity of starch Viscosity measuring instruments Viscosity is changed with the chnage with the time duration of temperature and change in Ph. Factors affecting to viscosity are:

15. High Viscosity Versus Low Viscosity Typically two different grades of alginate are used for dyeing. The low viscosity/high solids form is preferred for fine details on silk or wool, while the high viscosity/low solids form is preferred for cotton; the latter may also be used on silk when fine detail is not needed. Viscosity of thickeners Viscosity according to ADACHI Group- ADACHI  produce Derivatives of  textile printing thickeners , Fabric  printing thickeners  based on Guar Gum, Tamarind, Corn Starch and Tapioca Starch for different type of Dyes, Fabrics and  Textile Printing  Applications.

16. Uses of Printing Thickeners in Textile Industry Guar gum printing thickener is an important component in textile industry because of a number of uses. Guar gum for textile printing aids in direct painting on wool, nylon and silk. They are also use in printing dyes on cotton fabric, carpet printing, acrylic blanket printing, burn out printing and vat discharge. As color enhancers, the gum in printing gives life to print by giving color value to disperse dyes. Gums blend well with disperse dyes in the printing of polyester and similar fabric.

17. Properties of Textile Printing Thickeners Outlining the design – The hydrocolloid is used by printers to guide the design so that it does not bleed or extend to its borders . Prevents chemical reactions- Guar gum for printing has the ability to stop premature chemical reactions in the printing process . Gums are widely used in the paper, textile, and petroleum industries . Gums, such as gum arabic , are used for microencapsulation of medicinal and food products.

18. Conclusion Textiles cannot achieve perfect color without the aid of disperse printing thickeners which are composed of macromolecules and their ability to absorb water. There are four processes in making thickeners and manufacturing companies use various derivatives to produce high quality pastes such as gum, carboxymethyl guar gum and tamarind kernel powder. Guar gum printing thickener is multipurpose because it is also applied on cosmetic products and chemical solutions . Guar gum is known for its excellent viscous property. It provides excellent results of thickening when hydrated at cold water. Though hydrated at high temperature also provided fast results, cold water dispersion shows stable results.