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Topic: Desizing

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	Process for desizing and color fading garments - Patent 5366510
		A method for simultaneously desizing and decolorizing a dyed fabric or dyed garment having a sizing and a reducible dye which comprises treating said fabric or garment with an effective amount of reducing agent in an aqueous bath whereby the fabric or garment is both desized and decolorized prior to any subsequent oxidation or bleaching.
		Desizing is required where the fabrics or garments are to undergo further processing such as dyeing, printing, decolorization, treatment with a crosslinker, ozone treatments and the like.
		The desizing and removal of color of denim garments generally requires two independent operations wherein the sizing is first removed and then the garment is treated chemically or physically to obtain removal of the color.
	www.freepatentsonline.com /5366510.html (2509 words)

	Advanced Enzyme Technologies Ltd.
		Primiarily, enzymes are being used in fabric processing for desizing, scouring, degumming, biopolishing, printwash and bleach cleanup depending on the type of fibre.
		Desizing is very important process to remove sizing components from the textile.
		ADDSCOUR is an alkaline pectinase for bioscouring of woven cotton and knit...
	www.enzymeindia.com /products.asp?catid=26&category= (632 words)

	Environmentally Benign Preparatory Processes – Introducing a Closed-Loop System
		Desizing was performed with amyloglucosidase, an enzyme capable of decomposing starches into mostly glucose.
		The end-products of the enzymatic desizing process are various types of sugars and dextrins which are nontoxic, however, negatively impact the BOD of the wastewater.
		This observation raised the question whether the still active scouring and desizing enzymes in combination had an inhibitory effect on the glucose oxidase and needed to be deactivated before glucose oxidase addition or whether the other sugars produced as degradation products lowered the activity of glucose oxidase.
	www.eng.auburn.edu /department/te/ntc/2000/diller/C99-A07annual2000.htm (3164 words)

	Garment wash and processing products (Site not responding. Last check: 2007-10-30)
		Desizing is a process that removes chemical products, specifically warpsizes such as starch, from the surface of the fabric, which may inhibit the contact of other treatment chemicals such as cellulose enzymes or finishing chemicals (on greige fabrics) with the cotton fibers.
		Once the desizing cycle is finished, the garments must be carefully cleaned because the pumice powder and stones may depisit in the folds and the pockets.
		Biocell Desize must be kept in a tightly sealed container, at a temperature not exceeding 30°C, and away from direct sunlight.
	users.aol.com /itcintl/textile/garment.html (360 words)

	Environmentally Benign Preparatory Processes - Introducing a Closed-Loop System
		Desizing is performed with amyloglucosidase, an enzyme capable of breaking down starches into mostly glucose.
		Desizing processes that are considered environmentally friendly usually follow either one of two approaches - natural biodegradable sizing chemicals are applied, such as starch and starch derivatives, or synthetic recyclable formulations are employed.
		For the process of enzymatic desizing, the problem of the sugar-containing effluent has to be addressed.
	www.eng.auburn.edu /department/te/ntc/99/diller/c99a07.html (2185 words)

	Denim garment processing: The eco-friendly way - Express Textile - Dyes & Chemicals
		Desizing: Traditional desizing is performed by using acid or oxidative desizing agents which is associated with many drawbacks and limitations.
		With the introduction of enzyme based desizing process, the limitation and drawbacks of traditional desizing process can be overcome.
		The enzymatic desizing process is performed by using alphaamylase enzyme.
	www.expresstextile.com /20030320/dyes2.shtml (2325 words)

	Kotonline
		The oxidant most suitable for direct use in the desizing bath is hydrogen peroxide, since it acts at high temperatures and, therefore, enables both mould to degrade and sizes to rapidly solubilize.
		Desizing temperature The best results are obtained by maintaining desizing bath temperature in the range of 85°C to 95°C, except when treating acetate rayon and mixed wool fabrics, which only in certain cases support these temperatures (see chapters III and V.7).
		Contact time between desizing bath and sized fabric Time of contact between bath and fibre is essential to establish whether a certain desizing treatment is possible on a system and prepare the best recipes according to the effective characteristics noted.
	www.kotonline.com /english_pages/ana_basliklar/bozetto.asp (2197 words)

	Amitech Preperation Aux. (Site not responding. Last check: 2007-10-30)
		Can be used in a one-bath desizing or 2 step, one bath desizing and scouring.
		Preparation and scouring aid that desizes starch containing fabrics alone or in conjunction with caustic soda or enzymes.
		Solvent/detergent blend for desizing and scouring operations using batch or continuous techniques.
	www.amitech-usa.com /amitech-chemical/amitech-chemical_003.htm (337 words)

	Desizing - Biocrawler (Site not responding. Last check: 2007-10-30)
		Desizing, irrespective of what the desizing agent is, involves impregnation of the fabric with the desizing agent, allowing the desizing agent to degrade or solubilise the size material, and finally to wash out the degradation products.
		Fabrics containing water soluble sizes can be desized by washing using hot water, perhaps containing wetting agents and a mild alkali.
		You can find it there under the keyword Desizing (http://en.wikipedia.org/wiki/Desizing)The list of previous authors is available here: version history (http://en.wikipedia.org/w/index.php?title=Desizingandaction=history).
	www.biocrawler.com /encyclopedia/Desizing (422 words)

	Enzymatic Desizing of Fabrics
		As a consequence of the sizing, the warp threads of the fabric are not able to absorb water or finishing agents to a sufficient degree.
		But in most cases chemical breakdown of the size polymer in a separate desizing treatment is necessary in order to obtain the desired quality of the final fabric [2].
		In the conventional process of desizing, the breakdown of the size polymer is carried out using oxidizing agents such as ammonium persulfate or hydrogen peroxide at high pH and temperature.
	www.p2pays.org /ref/10/09230.htm (681 words)

	Annex B, Danish Environmental Protection Agency
		The basis for the project was the fact that desizing of woven textiles generates wastewater with a high content of COD.
		Therefore, the purpose of the project was to find the most suitable process of filtration of desizing wastewater through testing in laboratory and pilot scale as well as testing in full-scale.
		The desizing is carried out partly by oxidation and partly enzymatic.
	www.mst.dk /udgiv/publications/2002/87-7972-009-0/html/kap06_eng.htm (525 words)

	Glimpses of Indian textile wet processing scenario -I - Edit - Express Textile
		Cotton fabric is normally subjected to desizing and a number of research methods talk about desizing with hydrolytic and oxidative desizing agents, plasma treatment, etc. The rot steeping, acid desizing and enzymatic desizing are the conventional hydrolytic desizing techniques which are widely followed.
		While desizing can be achieved in 1-3 mins, scouring takes 90 to 120 mins, in J box or 2-10 minutes in vapour locks machines.
		Of all these methods, acid steeping, enzyme and bromite desizing and simultaneous scouring and desizing with persulphate are the cheapest as far as cost considerations are concerned.
	www.expresstextile.com /20031023/edit02.shtml (1285 words)

	American Textille, LLC
		This product is a highly effective desizing agent suitable for the removal of starch and synthetic polymer.
		WashTechs 7001 - A formulated liquid surfactant desize and scour agent that is highly recommended as a key desizing recipe component.
		is a highly concentrated liquid thermo stable amylase enzyme use as a desizing agent in garment wet processing.
	www.americantextilellc.com /washtechs.asp (1091 words)

	Chemunique : Volume 2, Issue 3 (Site not responding. Last check: 2007-10-30)
		The purpose of desizing is to adequately remove enough of the size film to allow further wet processing steps to occur at optimum efficiency.
		In the process of desizing, it eliminates the potential for streaks that are caused by uneven abrasion.
		This is one of the most effective means of desizing suitable for almost all types of denims.
	www.snaimpex.com /v6i1news4.htm (652 words)

	[No title]
		Namely, desizing of starch size, de- activation of peroxide after bleaching before dyeing and removal of fuzz from the surface, which is called as Biopolishing.
		For example, in desizing baths, alkaline earth metals should not be removed, because they stabilise Amylase enzyme, but heavy metal ions should be sequestered.
		Desizing is performed either a 700C or at boiling temp.
	www.eksoy.com.tr /cellulose.doc (3321 words)

	ENZYMATIC DESIZING
		The method of desizing depends on the composition of the size.
		This article mainly deals with enzymatic desizing, which means the use of µ - amylase enzymes to remove starch size.
		To ensure good conditions for desizing, it is necessary to understand some of the properties of enzymes being used.
	www.snaimpex.com /desizing.htm (959 words)

	Fabrics Cotton
		GTZYME is a bacterial α -amylase preparation used for effective desizing of cotton and its blends.
		It ensures efficient, economical and complete desizing of starch and derivatives in a manner that strength of the fabric remains intact.
		The most popular and high concentration desizing enzyme acts at low- medium temperature on starch and derivatives in cotton, denim and blended fabric or garments.
	www.garfintech.com /fabrics_cotton.php (1203 words)

	[No title]
		In a recent study conducted by researchers at NC State University, both helium and oxygenated-helium atmospheric plasma treatments were applied to desizing PVA on cotton.
		The percent desizing ratio (PDR) and tensile strengths of the cotton fabrics and single yarns were measured.
		The goal of this project is to repeat the plasma desizing experiment above on PVA sized cotton fabrics using He/CF4 atmospheric plasma, and to characterize the percent desizing ratio (PDR) and tensile strengths of the cotton fabrics.
	www.che.ncsu.edu /reu/projects/McCord_Bourham_project.doc (598 words)

	Effect of atmospheric plasma treatment on desizing of PVA on cotton Textile Research Journal - Find Articles
		Both air/He and air/O2/He atmospheric plasma treatments are applied to desize PVA on cotton, then PDR (percent desizing ratio) and tensile strengths of cotton fabrics and single yarns are measured.
		After plasma treatment (or desizing by H^sub 2^O^sub 2^) and conditioning in a desiccator, the cotton samples were subjected to a cold wash and a hot wash. For the cold wash, the fabric was immersed in deionized water at room temperature at a 20:1 liquor-to-fabric ratio and stirred for 15 minutes.
		The sized cotton specimens were conditioned, weighed, and two-dipped-two-nipped in a desizing bath containing 0.6% H^sub 2^O^sub 2^ (35%) and 3 g/l NB-S dispersing agent with a pickup of 100 + or - 5%.
	www.findarticles.com /p/articles/mi_qa4025/is_200308/ai_n9259932#continue (886 words)

	4. Cleaner technology in enzymatic desizing, Danish Environmental Protection Agency
		Wastewater from the desizing bath and the first rinse after desizing of starch based sizes will have a very high COD load, and it will have an elevated temperature, typically 60
		Wastewater from nine jiggers executing desizing is collected in a holding tank, from which the wastewater is led to the membrane filtration plant.
		The permeate (cleaned water) is reused for desizing and washing purposes, where the energy content can be utilised as well.
	www.mst.dk /udgiv/publications/2002/87-7972-009-0/html/kap04_eng.htm (587 words)

	NYLSTAR - TECHNICAL INFORMATION - WEAVING 5
		Polyamide yarn warps are normally sized with polyacrylate-based sizes for use in weaving on water-jet looms and with sizes based on polyacrylic acids for weaving on dry looms.
		Desizing may be carried out as a continuous process on open-width washing machines or discontinuous on a jig or overflow.
		Fabrics must not be stored when damp and must be dried rapidly on a stenter at a temperature of approximately 120°C (max.
	www.nylstar.com /all/tech_info/weav_tech/tech_wea5.html (236 words)

	M.L.Chemical (India) Pvt.Ltd. (Site not responding. Last check: 2007-10-30)
		DEL DESIZING is an alpha amylase enzyme derived from a selected strain of Bacillus.It promotes the rapid removal of starch sizes by breaking down the starch in to soluble dextrins.
		In Denim processing desizing is a very important step to obtain a good finish.If the size is not removed rapidly,the irregular folding of denim might lead to formation of streaks that are undesirable.Whether it is an indigo Denim washing or Denim over-dyeing, a proper desizing leads to a development of superior result.
		If Desizing is done at a lower temperature, a higher dosage of the enzyme must be employed.In case of heavily sized and thick Denim, a lubricant can be used during Prewetting.
	www.mlindia.com /desizing_textile.htm (316 words)

	M.L.Chemical (India) Pvt.Ltd. (Site not responding. Last check: 2007-10-30)
		Desizing is recommended to be carried out at an optimal pH range of 6.5 - 7.0 and an optimal temperature range of 65 - 70 deg C (150 – 160 deg F) for a period of 20 mins with a DEL DESIZING dose rate of 4 to 6 grams per Kg.
		Enough water level during Desizing operation has to be ensured.
		On completion of desizing which is traditionally checked by “ handfeel” to observe absence of “stickiness”, the liquor is drained and rinsed with plain water.
	www.mlindia.com /textilepro_neutral.htm (640 words)

	Aqueous suspensions of peroxydisulfates and their use as oxidative desizing agents for textile goods sized with starch ...
		When used in an amount of 10 g/liter of desizing liquor and under conditions which were otherwise identical to those in Example 1, the comparative sample produced an adequate desizing effect only immediately after its preparation (Tegewa value of 8).
		Using the comparative samples in the desizing liquor in the amounts and under the conditions given in Example 2, desizing was no longer possible after the samples had been stored at 50.degree.
		When added to desizing liquor in an amount of 6 g/liter, the mixtures from Examples 3 and 4 gave Tegewa values of from 8 to 9 on loomstate cotton plain-weave and twill fabrics at a liquor pick-up of 100%, a liquor temperature of from 100.degree.
	www.freepatentsonline.com /4507220.html (1869 words)

	Custom Synthesis: Manufacturer of specialty chemicals and custom blends for the textile, paper, metal working, ... (Site not responding. Last check: 2007-10-30)
		Synthazyme HST is a quadruple strength thermal stable bacterial alpha amylase used in the removal of starch containing size.
		DSZ is a broadband desizing agent with the ability the ability to remove industrially applied starches, natural or synthetic from the fabric.
		PRE is a fabric lubricant that when used in the Desize bath is highly effective in preventing crack marks and streaks that can occur during desizing.
	www.customsynthesis.net /uploads/Desizing.asp (446 words)

	Textile Enzymes, Enzymes for Textile, Desizing Enzymes, Bio Polishing Enzymes, Denim Finishing Enzymes, Stone Washing ...
		For fabrics made from cotton or blends, the warp threads are coated with an adhesive substance know as 'size‘; to prevent the threads breaking during weaving.
		This process (desizing) must be carried out by treating the fabric with chemicals such as acids, alkali or oxidising agents.
		However starchbreaking enzymes (amylases) are preferred for desizing due to their high efficiency and specific action.
	www.mapsenzymes.com /Enzymes_Textile.asp (900 words)

	Apparel Views: Your window to the world of apparel industry... (Site not responding. Last check: 2007-10-30)
		The processors however face several problems and hence the need to use the right chemicals in denim garment processing is very essential.
		Traditional desizing is performed by using detergent and soda or hydrochloric acid or oxidative desizing agents which is associated with many drawbacks and limitations.
		The enzymatic desizing process is performed by using alpha amylase enzyme.
	www.apparelviews.com /processing/denimmay05.html (1041 words)

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