March - April 2013

SITRA News

This issue of SITRA NEWScovers the following topics:

Page no.PRODUCTIVITY AND COSTS

What cotton fibre quality is required to achievehigher production rates in ring frames? 1

TECHNICAL NOTES

Fibre properties influencing cotton cleanability 3

PROJECTS

Inter-fibre cohesion in imported & indigenous cottonsand its influence on yarn quality 6

MEDICAL TEXTILES - Series 20 11

CONSULTANCY SERVICES OFFERED BY SITRADURING MARCH – APRIL 2013 12

STAFF NEWS 12

TRAINING PROGRAMMES 14

ABSTRACT OF A TECHNICAL ARTICLE 16

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March - April 2013

SITRA News

What cotton fibre quality is required to achieve higherproduction rates in ring frames?

Some mills have requested SITRA to suggest norms for cotton fibrequality to achieve SITRA standard production rates in ring frames.

It is difficult to fix norms for fibre properties towards achieving standardproduction rates in ring frames, since besides fibre quality, many otherparameters more particularly technology of machines and theircondition and expected yarn quality also determine the productionrate. Nevertheless, towards helping mills in this regard an attempthas been made to present the fibre quality being used by the millsachieving SITRA standard production rates and above.

As mills are aware that since 1997 SITRA has been conducting aninter-mill study on ‘Costs, Operational Performance and Yarn Quality’,popularly known as CPQ study. So far 28 studies have been completed.In each study, over 100 mills from all over India are taking part. Thesestudies, besides costs and operational parameters, also cover qualityof cotton used by the mills for different counts.

The average fibre quality used by the mills achieving standard productionrates and above was culled from the data available in the last 2 CPQstudies (27th and 28th). The fibre quality data available for 8 differentcounts and varieties, yarns ranging from 20s to 60s are given in Table1 and the corresponding yarn quality achieved by the mills is given inTable 2.

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SITRA News

Table 1 Higher production rates and corresponding cottonfibre quality maintained by the mills

Note: SL = Span length; UR = Uniformity ratioMC = Micronaire; P = Production per spindle per 8 hours (g)

Table 2 Higher production rates and correspondingyarn quality achieved by the mills

It can be seen from Table 1 that the average fibre quality used by themills achieving standard production rates and above is almost samefor the coarse and medium counts, as given below.

Avg. cotton fibre quality used by the high productivity mills(for 20s to 40s)

Note: For data regarding other counts, please referCPQ study reports

- D.ShanmuganandamLiaison and Consultation Division

S. no. Count No.of

mills

Average Avg. cotton quality particulars SITRA Std. (P)

Spindle speed (rpm)

Prodn./ spl./

8 hrs. (g)Tpi

2.5% SL

(mm)

UR (%)

Str. (g/ tex)

Fineness (MC value)

Trash(%)

1. 2. 3. 4. 5. 6. 7. 8.

20s 30s 40s 30s CH 30s CH-Comp.30s CH-Ex. 40s CH 60s C-Comp.

2 8

14 2 3 2 5 3

15600 17150 18780 17500 17830 17600 18800 21370

290 162 117 210 226 205 148 77

17.5 23.1 26.8 19.4 18.1 19.6 22.1 31.0

30 30 30 30 30 30 30 31

48 47 47 47 48 47 47 46

23 23 23 22 21 23 22 25

3.8 3.5 3.6 3.6 3.8 4.0 3.6 3.5

3.1 3.0 3.1 2.5 2.7 2.7 2.9 3.5

262 159 110 199 199 199 142 73

 

S. no. Count No.of

mills CSP U% Total

imperfections / kmHariness

index

1. 2. 3. 4. 5. 6. 7. 8.

20s 30s 40s 30s CH 30s CH-Comp. 30s CH-Ex. 40s CH 60s C-Comp.

2 8

14 2 3 2 5 3

2675 2540 2450 2600 2850 2525 2400 3150

10.7 12.0 13.5 9.6 9.4 9.8

10.2 11.1

204 630

1280 75 64 91 170 264

6.4 6.8 6.2 6.6 5.1 6.6 6.2 3.4

 

2.5% span length (mm) Uniformity ratio (%) Fibre strength (g / tex) Fineness (mc value) Trash content (%)

30 47 23 3.7 3.0

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March - April 2013

SITRA News

Fibre properties influencing cotton cleanability

It is a common experience that different cottons respond differently tothe same opening treatment. The response primarily depends on trashcontent and some fibre properties. The combined influence of fibreproperties on the response of cotton to cleaning is termed as ‘Cleanabilityof Cotton’.

Hence, ‘Cleanability ’ is defined as C = CE / t

Where, C = Cleanability of cotton, CE = Cleaning efficiency, t = Trashin feed material.

‘Cleanability’ in short refers to the cleaning efficiency achieved in agiven beater (or series of beaters) for a given level of waste extractionwithout causing any fibre damage or nep generation. However, as iswell known, cleaning efficiency tends to increase with increase in theamount of waste extracted in the beater. Hence, while calculating the‘Cleanability of Cotton’, the amount of waste extracted ought to remainconstant for different cottons.

A pilot study towards identifying fibre properties influencing ‘Cleanabilityof Cotton’ has been carried out at SITRA and the results are reported inthis technical note.

Nine cottons, differing widely in fibre properties, were taken for the studyand they are F-414, LRA, Ruska, Digvijay, MCU 5, DCH 32, Kati, Gizaand Pima.

The major fibre properties of the cottons are given in Table 1.

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March - April 2013

SITRA News 4 5

Table 1 Major fibre properties of cottons studied

All the cottons were processed through a spiked beater. (This ensuresthat the cleaning treatment given to the cottons remains the same).Care was taken to ensure that no fibre damage occurred during thetreatment. However, the amount of waste extracted was different fordifferent cottons. Hence, the cleaning efficiency for the nine cottonswas normalized for a given level of waste extraction. Cleaning efficiencyof different cottons (Normalised), % trash in feed material and thecleanability factor are given in Table 2. (for the nine cottons underconsideration).

Table 2 % Trash in feed material, cleaning efficiency andCleanability (C) values of cottons studied

* Normalised values

S. no.

Type of cottons

2.5% SL (mm)

Bundle strength (g/tex)

Micronaire value

Maturity co-eff.

1 F-414 24.7 18.6 4.1 0.788

2 LRA 27.0 22.6 4.0 0.800

3 Ruska 34.2 24.4 4.5 0.880

4 Digvijay 21.2 14.4 4.7 0.778

5 MCU 5 30.0 23.4 3.2 0.782

6 DCH 32 32.5 25.2 2.7 0.728

7 Kati 27.4 20.3 4.6 0.802

8 Giza 34.4 28.5 4.1 0.872

9 Pima 34.6 31.9 4.1 0.862

S. no.

Type of cottons

Trash in feed material (%)

Cleaning eff. (%)* Cleanability

1 F-414 3.02 27.8 9.2

2 LRA 3.11 8.4 2.7

3 Ruska 2.00 9.0 4.5

4 Digvijay 2.15 8.8 4.1

5 MCU 5 1.80 10.0 5.6

6 DCH 32 3.00 14.3 4.8

7 Kati 2.10 38.1 18.1

8 Giza 1.94 28.9 14.9

9 Pima 1.48 39.2 26.5

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March - April 2013

SITRA News

To relate cleanability with fibre properties, a linear polynominal of thefollowing form, was attempted

‘C’ = K1 + K2 x L + K3 x S + K4 x F + K5 x t

Where, L = 2.5% span length (mm); S = Bundle strength at 3mmgauge (g/tex); F=f/m (Micronaire value / maturity co-efficient); t = %trash in cotton. (K1, K2, K3, K4 and K5 are constants)

By the method of least squares, the values of various constants wereestimated and they are

K1 = 61.2, K2,= -2.17, K3 = 1.91, K4 = -2.17,K5 = -8.89

Hence, the expression to determine the cleanability (C) from fibreproperties is given by:

C = 61.2 – 2.17 L + 1.91 S – 2.17 F – 8.89 t …… (i)

A fairly high correlation of the order of 0.87 was obtained betweenactual and predicted values of ‘C’; (Figure 1)

Figure 1 Relationship between actual and predicted ‘C’ values

- Dr.K.P.Chellamani,Spinning Division

0

5

10

15

20

25

0 5 10 15 20 25

Actual 'C' values

Predicted 'C' values

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March - April 2013

SITRA News

Inter-fibre cohesion in imported & indigenous cottonsand its influence on yarn quality

It is well known that some of the imported cottons exhibit better spinningperformance and yarn quality as compared to their indigenouscounterparts. To be specific, the major fibre quality attributes of twoimported and two indigenous cottons (which are commonly used tospin 60s Combed yarn & 40s Combed yarn) are given in Tables 1 & 2:

Table 1 Quality attributes of imported and indigenous cotton 60s Cotton

Table 2 Quality attributes of imported and indigenous cotton40s Cotton

It is clear from the tables that the difference in major fibre qualityattributes between imported & indigenous cottons (that are taken forthe study) is rather marginal.

Cotton type Fibre quality attributes

Imported (Ultima Acala)

Indigenous (MCU-5)

2.5 % Span Length (mm) 32.0 31.5

Mic Value (μg/inch) 3.6 3.7

Uniformity Ratio (%) 46.5 46.0

Cotton type Fibre quality attributes

Imported Western African

- Nambo’s

Indigenous(S6)

2.5 % Span length (mm) 29.5 30.0

Mic value (μg / inch) 3.4 3.5

Uniformity ratio (%) 46.6 46.0

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March - April 2013

SITRA News

However, when they are spun into yarns of appropriate linear density,there is significant difference in their quality attributes, particularly inyarn imperfections.

The yarn quality details are given in Tables 3 & 4.

Table 3 Quality attributes of yarns spun fromimported and indigenous cottons

Count: 60s CW

Table 4 Quality attributes of yarns spun fromimported and indigenous cottons

Count: 40s CW

Yarn quality attributes

Single yarn strength CV

(%)

Single yarn elongation

CV (%)

Imperfections / Km

Thin places (-50%)

Thick places (+50%)

Thin + Thick places

60s CW from imported cotton (Ultima

Acala)

8.69 11.76 2 16 18

60s CW from indian

cotton (MCU5)9.16 12.12 10 26 36

Count

Yarn quality attributes

Single yarn strength CV

(%)

Single yarn elongation

CV(%)

Imperfections / Km

Thin places (-50%)

Thick places (+50%)

Thin + Thick places

40s CW from imported

cotton –Nambo’s

9.78 10.68 8 39 47

40s CW from indian cotton – S6

11.55 12.82 11 59 70

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March - April 2013

SITRA News

The difference in yarn imperfections (measured at normal sensitivitylevels) in 60s CW & 40s CW spun using imported & indigenous cottonscould not be fully explained by the difference in the respective fibrequality attributes (that are commonly measured). Hence, the inter-fibre cohesion in imported & indigenous cottons was measured usingUniversal tensile tester (Instron) as per ASTM D 2612- 05 standardtest method. The test method deals with measurement of inter–fibrecohesion in a bundle of fibres in the form of sliver or top. Finisherdrawing sliver samples were prepared from the four cottons (imported& indigenous) and their inter-fibre cohesion values measured. The valuesare given in Table 5.

Table 5. Inter-fibre cohesion in drawframe slivers made usingimported & indigenous cottons

It is clear from Table 5 that inter-fibre cohesion is higher (around 30%)in slivers produced using imported cottons as compared to that fromindigenous cottons.

An attempt was made to develop an index expressing the inter-fibrecohesion (in drawframe sliver) in terms of fibre properties for imported& indigenous cottons and the same is given by

i) IFC* = 33 -------------------------------- for imported cottons

and

ii) IFC = 25 -------------------------------- for indigenous cottons

* IFC – Inter-fibre cohesion

S. no.

Sample Inter -fibre cohesion

(mgf / tex)

1. Finisher sliver from Ultima Akala cotton 28.0

2. Finisher sliver from MCU5 cotton 22.0

3. Finisher sliver from Nambo’s cotton 25.7

4. Finisher sliver from S6 cotton 20.0

2.5 % SL

Mic value x SFC (n)

2.5 % SL

Mic value x SFC (n)

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March - April 2013

SITRA News

This is largely attributed to the relatively higher level of convolutions inimported cottons. Convolutions are ribbon like twists which are producedduring drying of the cotton cell content under the influence of sun. Asper available information, Egyptian cottons have about 230 convolutions/ inch, American cottons have around 190 convolutions / inch andIndian cottons in the range of 125 – 130 convolutions / inch.

Two experiments were carried out (using one imported cotton and oneindigenous cotton) to identify the optimum combination of draft (in flyframe & ring frame) from the point of view of yarn quality i.e) drafts inflyframe & ringframe were altered to have more or less same total draft(draft in flyframe X draft in ringframe) for a given count and thecorresponding yarn quality attributes studied. The parameters & qualityattributes are given in Table 6.

In the case of imported cotton (with higher value of IFC in drawframesliver) a relatively higher level of draft in ringframe and for indigenouscotton (with lower value of IFC in drawframe sliver) a comparativelylower level of draft in ringframe (for a given level of total draft – draft inflyframe x draft in ringframe) appear to be good from the view point ofyarn quality, particularly imperfections.

It is postulated that higher level of draft in ringframe for materials withhigher IFC is necessitated for effective removal of twist in roving andthereby to ensure good control over drafting waves. Trials with somemore counts of yarns spun using imported & indigenous cottons are inprogress.

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March - April 2013

SITRA News

S.

No.

C

ount

IFC

in

draw

fra

me

sliv

er

(mgf

/ te

x)

Dra

ft in

fly

fram

e

Dra

ft in

sp

inni

ng

fram

e dr

aft*

Yarn

qua

lity

attri

bute

s

Sin

gle

yarn

st

reng

th

CV

(%)

Sin

gle

yarn

el

onga

tion

CV

(%)

Impe

rfect

ions

/ km

Thin

pl

aces

(-

50

%)

Thic

k

plac

es

(+ 5

0%)

Thin

+

Thic

k pl

aces

1

60s

CW

(U

ltim

a - A

kala

) 28

.00

11.8

10

.0

38

45

450

10.0

2 8.

69

12.9

6 11

.76

8 2

38

16

46

18

2 60

s C

W

(MC

U5)

22.0

0 11

.8

10.0

38

4545

0 9.

16

12.2

412

.12

13.7

510

16

26

3636

52

 

Tabl

e 6

Dra

ft di

strib

utio

n be

twee

n fly

fram

e &

ring

fram

e an

d th

eco

rresp

ondi

ng y

arn

qual

ity a

ttrib

utes

- K.P

.Che

llam

ani &

M.K

.Vitt

opa

Spin

ning

Div

isio

n

* to

tal d

raft

= dr

aft i

n fly

fram

e x

draf

t in

ringf

ram

e

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March - April 2013

SITRA News

Antistatic fibres acting as antibacterial fibres

‘Biotec’ is a permanent antibacterial fabric for all usage areas wherebacterial proliferation presents a danger. ‘Biotec’ is particularly usefulto the hospital environment as well as the agri-food industry. ‘Biotec’is manufactured using R-stat fibre. R-stat fibre is a PA 6.6 fibre coveredwith a fine layer of copper sulfide (0,2 micron) intimately integratedinto the polymer by a chemical process. The R-stat fibre is a goodconductor of electricity, and it prevents accumulation of static chargeson clothing. The copper ions liberated by this layer affect themetabolisms of the bacteria and prevent their proliferation. The ‘Biotec’fabrics are available in a plain weave version of 180 g/m2, and in twillformat of 215 g/m2. As per available information, these fabrics canendure fifty cycles of hospital washing without their antistatic andantibacterial properties being affected. ‘Biotec’ is mainly intended forthe manufacture of shirts, blouses, trousers and operating room fabrics.

The R-stat P anti-static fibre based on high tenacity PES as the hostpolymer can be used in the manufacture of air filter systems. The fibrehas excellent electrical conductivity combined with durable antibacterialproperties. The fibres resist long exposure to high temperature(1700 C) and to acid hydrolysis as usually required for many industrialfilter systems.

Fibres which promote healing

A ‘polynosic fibre’ into which naturally – occurring radioactive mineralsare incorporated is claimed to be promoting healing. The mineral mixturecontains 18 elements including uranium, thorium, cerium andneodymium. Health materials based on these minerals are harmlessand occur naturally in hot spring areas. The effect is to stimulatemetabolism, sterilizing, deodorizing and to create a relaxed feeling.

To be continued…- K.P.Chellamani and M.K.Vittopa,

Spinning Division

MEDICAL TEXTILES Series 20

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March - April 2013

SITRA News

Meetings attended

Dr. Prakash Vasudevan, Director, attended a meeting on StandingCommittee on labour, Lok Sabha Secretariat which was convened totake evidence from the representatives of the Ministry of Textiles ondemands for Grants for the year 2013-14 held at Parliment LibraryBuilding, New Delhi.

Dr. Prakash Vasudevan, Director, attended the Inaugural function ofthe Regional office of the Indian Technical Textile Association (ITTA), atSIMA, Coimbatore.

MEDICAL TEXTILES - 11 S.no. Type of study No. of mills

Consultancy services offered by SITRAduring March - April 2013

1. Capacity rating study 12. A study on yarn realisation 13. Estimation of conversion cost 14. Ukg study 15. Energy audit 16. Study on water consumption & material to

liquor ratio of soft flow dyeing machines 37. Study on the water consumption of yarn

dyeing machines 18. Optimisation of process sequence and

parameters to achieve the desired width-wisedimentional stability in cotton / flax blendedwoven fabrics after processing 1

Besides the above major consultancy studies, SITRA also offeredsolutions to four adhoc problems in the area of spinning process.One hundred and fourty eight instruments were calibrated, 3instruments were certified and 240 accessory samples were tested.

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March - April 2013

SITRA News

Dr. K.P.Chellamani, General Manager - Projects, attended thefollowing meetings:

- the Doctoral committee meeting held at PSG College ofTechnology, Coimbatore on 5th April, 2013.

- the 10th Board of Studies meeting for the year 2012-13 held atBannari Amman Institute of Technology, Sathyamangalam on13th April, 2013.

- the Cotton Advisory Board(CAB) meeting held at the Office of theTextile Commissioner, Mumbai on 17th April, 2013.

Mr. Sakthivel Perumalsamy, Head - Centre of Medical Textiles,attended the meeting of the appraisal & review of Technology Missionon Technical Textiles (TMTT) by M/s.Investment information CreditRating Agency (ICRA) Management consulting services, held at Officeof the Textile Commissioner, Mumbai, on 8th March 2013.

Papers published

1. K.P.Chellamani, R.S.Vignesh Balaji and J.Sathish “Spunlacewound dressing using bamboo fibres”, Asian Textile Journal, March2013, Volume 1, No. 3, pp. 69 - 79.

2. K.P.Chellamani and R.S.Vignesh Balaji “Medical textiles usingnonwoven technology - Part II”, SITRA E-Bulletin, April 2013, Volume1, Issue 2.

3. S.Mariappan and D.Shanmuganandam “Improving yarn qualitytowards reducing knitted fabric defects - a case study”, Asian TextileJournal, April 2013, Volume 22, No. 4.

Seminars conducted

The following seminars were organised by the CoE meditech towardscreating business opportunities in medical textiles:

- Business opportunities in medical textiles held at Salem inassociation with PLSC, Salem, supported by Office of the TextileCommissioner, Mumbai.

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March - April 2013

SITRA News

- Investment opportunities in medical textiles held at Madurai inassociation with Madurai district small and tiny industriesassociation, Madurai, supported by Office of the TextileCommissioner, Mumbai.

Awards received

The “National Award for Technology Innovation : 2012-13”, was awardedto K.P.Chellamani, D.Veerasubramanian and R.S.Vignesh Balajifor the project “Barbed bi-directional surgical sutures” under the category“Innovation Polymers in public health care”. This award is sponsoredby the Ministry of Chemicals and Fertilisers, Government of India,New Delhi.

Recognition

Mr. G.Chandrasekaran, Senior Laboratory Assistant (SLA), TextileEngineering and Instrumentation Division has cleared the examinationsconducted by the Bureau of Energy Efficiency (Government of India)New Delhi, qualifying him as a “Certified Energy Manager”.

Entrepreneur development programme in “Shuttleless weavingmachines“

The programme was organised with the objective of educating youngentrepreneurs on the technologies involved in weaving, case studiesrelating to woven fabric defects and remedial measures, TUF scheme,various sources of availing loans, the modalities involved in setting upnew units etc. Five persons comprising of Managing Directors, seniorexecutives and technical personnel attended the programme.

HOKTRAINING

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March - April 2013

SITRA News

Pre-employment training and retraining programmes fortextile workers

Two out-station mills availed SITRA’s training services for their workers.In all, 97 operatives were trained in 5 batches for the tenting jobs inring spinning and auto cone winding. The training programmes wereconducted in Kannada and Malayalam in each one mill.

Programme on “Training of trainers”

Under a request from a spinning mill in Kerala, a three day “Training oftrainers programme” was organized to impart training to the mill’strainers. The aim of the programme was to sensitize them to effectivelydischarge their role and functions and achieve improvement in the mill’sworking. The topics covered included, productivity, quality management,waste reduction, proper planning and scheduling of activities, methodsof training, identification of training needs, training evaluation, rightwork methods to be followed and effective communication and inter-personnel skills. A total of 13 trainers attended the programme.

Training Programme on “Energy Management in Spining Mills”

With a focus of reaching out its services to mills in upcoming textileclusters, SITRA organised a two-day training programme on “EnergyManagement in Spinning Mills” exclusively for the benefit of membermills of Andra Pradesh Spinning Mills Association. The programmewas held at Guntur on 29th and 30th March 2013. Some of the topicsthat were covered during the programme included, selection andmaintenance of electrical equipment, case studies in electricaldistribution system, power quality problems and solutions, electricalsafety audit, calculation of 40s converted UKG, modern energyconservation techniques in humidification, optimisation of compressedair consumption in textile industry, case studies in humidification andcompressors and renewable energy sources. A total of 40 persons,including general managers, electrical engineers and electricalsupervisors attended the programme.

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March - April 2013

SITRA News

INTEGRATED SKILL DEVELOPMENT SCHEME (SITRA – ISDS)

The “Integrated Skill Development Scheme” initiated by the Ministry ofTextiles, Govt. of India, aims to leverage the strength of institutionslike SITRA to augment the skill resources of the industry for enhancingcapabilities for skill development. Under this scheme, SITRA is offering13 different skill development programmes. Following are the detailsof the programmes that were conducted during March - April 2013.

Eight outstation and six local mills availed for training their operatives.Totally, 484 operatives were trained in 20 batches in spinning mills fora period of one month for the tenting jobs in preparatory, spinning,cone winding, reeling, open end spinning, two-for-one twister andweaving. The training programmes were conducted in Tamil in 7 mills,Malayalam in 5 mills, Telugu in 1 mill and Hindi in two mills.

THERMAL AND WATER VAPOUR RESISTANCE OF THEELASTIC AND CONVENTIONAL COTTON FABRICSDunja Sajn Gorjanc, Krste Dimitrovski and Mateja Bizjak,Textile Research Journal, Vol. 82, No. 14, September 2012,pp. 1498-1506

The clothing comfort depends mainly on the thermal and water vapourtransfer properties of the fabric. The influence of incorporating elastanefilaments in the weft direction of a cotton fabric and the structuralproperties of the fabric (thread density, weave type etc) on thermal &water vapour resistance of the fabric are reported in this article. Bothplain weave & twill weave fabrics were studied by the authors. Thermaland water vapor resistance were determined with two novel methodsand compared with the well-known permetest method. The thermalresistance was calculated according to the thermal conductivity methodand permetest method, while the water vapour resistance was measuredusing water cup method and permetest method. The authors report

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March - April 2013

SITRA News

WATER CONSUMPTION AUDIT

Textile processing units, especially of small and medium scalenature, are facing tough times due to the imposed restriction ofsanctioned production capacity per day in relation to the capacityof effluent treatment plant available in the factory. The effluentgenerated by a mill can be calculated on the basis of waterconsumed per kg of material processed, multiplied by the quantityof material processed in kg. As a thumb rule, a water consumptionof 75 l / kg of material processed is considered for this calculationby the authorities. However, with the advent of low liquor ratiomachines and right first time dyeing techniques, it is possible forthe mills to achieve much lower water consumption levels thanthe limits as per thumb rule.

SITRA’s Textile Chemistry Division has been conducting waterconsumption audit of processing machines based on requestsfrom mills towards ascertaining the water consumption in litresper kg of material processed. About 15 mills have already utilizedthe service in this regard and some of them have reported that asa result, they have received increased production capacitysanctioned by the authorities. Processing mills may make useof SITRA’s water consumption audit to improve their sanctionedproduction capacities.

that the study results showed that elastane incorporation in the cottonfabric increases the thermal and water vapour resistance by 20% ascompared to conventional cotton fabrics. It is also reported that twillweave fabrics showed higher thermal and water vapour resistance by30-40%, in comparison with that of plain weave fabrics.

- R.S.Vignesh BalajiSpinning Division

New Service offered

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March - April 2013

SITRA News

This Division offers consultancy services to textile chemicalprocessing industries and other related institutions on varioustechnical and commercial aspects, a few of which are mentionedbelow:

Project appraisal for new and expansion projectsTechnical guidance for setting-up of in-house qualitycontrol laboratoryTechno-economic viability study for processing unitsProcess optimization to achieve desired qualityparametersEstimation of efficiency of various processes viz.,desizing, scouring, bleaching, mercerizing, etc.Evaluation of elongation / shrinkage of fabrics dueto processingStudy on weight loss of textile materials duringchemical processingStudy on the production capacity of processing unitsStudy of water consumption and / or material to liquorratio of various processing machinesAnalysis of TDS and other parameters in textileprocessing effluents and troubleshooting of effluenttreatment plantsTime study for any given process in a wet processingunitAny other adhoc problems related to processing

Mills may make use of SITRA’s above consultancy services aswell.

For details, please contact:

S. SivakumarHead – Incharge, Textile Chemistry DivisionThe South India Textile Research AssociationCoimbatore - 641 014, Indiae-mail: chem@sitra.org.in, Phone: +91 422 4215334, 4215328.

Consultancy ServicesOffered by the Textile Chemistry Division

18