001910   Dhamija S;Chopra M (The Technological Institute of Textile & Sciences, Birla Colony, Bhiwani-127 021, Email: titbhiwani@sancharnet.in) : Tearing strength of cotton fabrics in relation to certain process and loom parameters. Indian J Fibre Text Res 2007, 32(4), 439-45.

Tearing strength of cotton fabrics made of ring- as well as compact-spun weft yarns has been studied in relation 10 certain process and loom parameters. It is observed that the fabrics made of compact-spun weft yarns are more tear resistant. The tearing strength further improves particularly in the weft-way direction with the increase in weft yarn linear density and welt tex twist factor. There is an initial increase in strength followed by a decrease as the number of picks/inch is increased in the cotton fabrics made of compact-spun yarns. However, for the fabrics made of ring yarns, it shows a general decreasing trend. The 2/2 designs are found to be superior in warp-way but inferior in weft-way directions. The fabrics woven on air-jet looms show lower tearing strength than those woven on projectile looms. The mechanical finish as well as the variation in shed opening do not affect the tearing strength of cotton fabrics produced from compact-spun weft yarns.

4 illus, 3 tables, 20 ref

001909   Debnath S;Madhusoothanan M (NO, National Institute of Research on Jute & Allied Fibre Technology, 12 Regent Park, Kolkata-700 040, Email: sanjoybnath@yahoo.com) : Compression behaviour of jute-polypropylene blended needle-punched nonwoven fabrics. Indian J Fibre Text Res 2007, 32(4), 427-33.

The effect of fabric weight, needling density and blend proportion of jute and polypropylene fibres on companion properties has been studied. Box and Behnken experimental design has been used to study the individual and interactive effects on compression properties, namely initial thickness, percentage compression, percentage thickness loss and percentage compression resilience of jute-polypropylene blended needle-punched nonwoven fabrics. It is observed that the initial thickness increases prominently with the increase in fabric weight at the level of 40% polypropylene content in fabric. The fabric thickness reduces with the increase in needling density and the effect of fabric weight on initial thickness of the fabric is negligible at the higher level of polypropylene content in fabric. The increase in needling density or fabric weight reduces the percentage compression of jute-polypropylene fabric. The percentage thickness loss decreases with the increase in fabric weight. At higher fabric weight, the increase in needling density decreases the percentage thickness loss. irrespective of blends. The percentage compression resilience of the fabric increases with the increase in polypropylene content in the blend.

3 illus, 3 tables, 19 ref

001908   Das D;Maulijk S R;Bhattacharya S C (NO, Institute of Jute Technology, 35 Ballygunga Circular Road, Kolkata-700 032, Email: ijt@cal2.vsnl.in) : Dyeing of wool and silk with Bixa orellana. Indian J Fibre Text Res 2007, 32(3), 366-72.

Silk and wool fabrics have been dyed employing extract of seeds of annato (Bixa orcllana) in absence and presence of magnesium sulphate, aluminium sulphate and ferrous sulphate. Colouration of both the fibres is found to be most effectively accomplished at pH 4.5 commonly in the absence and presence of such inorganic salts. Colour uptake for wool is found to be more than that for silk under all the conditions studied. The use of ferrous sulphate produces significant improvement in colour uptake when both the substrates are treated with such salt prior to application of annato. Coloured protein fibres, in general. produce light and wash fastness ratings of 2-3. Ferrous sulphate, however, improves colour fastness propertii-colour retention on washing of wool and silk fibres.

5 illes, 6 tables, 19 ref

001907   Das A;Kothari V K;Nagaraju V (Textile Technology Dep, Indian Institute of Technology, New Delhi-110 016, Email: apurba_das@hotmail.com) : Frictional characteristics of woven suiting and shirting fabrics. Indian J Fibre Text Res 2007, 32(3), 337-43.

Functional characteristics of woven shirting and suiting fabrics with different blends and constructional parameters have been studied. Fabric-to-metal surface and fabric-to-fabric frictional characteristics in both warp-warp and weft-weft directions have also been studied. It is observed that the normal load and the frictional force follow the logarithmic relationship for all the fabrics. The nature of fabric friction has been characterized by different parameters, like ratio of frictional force to normal load, friction index, friction parameter and their ratio. Fabric-to-metal friction is found to be less sensitive to fabric morphology and rubbing direction, whereas the fabric-to-fabric friction is highly sensitive to these factor-.. Fabric-to-fabric friction has been affected by lot of factors, like type of fibre, type of blend, yarn structure, fabric structure, crimp, compressibility, etc. For all the fabrics, the kinetic friction is always lower than the static friction at different levels of normal load and the F/N ratio reduces consistently with the increase in normal pressure.

4 illus, 5 tables, 29 ref

001906   Dalvi P;Anthappan P;Darade N;Kanoongo N; Adivarekar R (Fibres and Textile Processing Technology Dep, Mumbai University Institute of Chemical Technology, Matunga, Mumbai-400 019, Email: ravi@udct.org) : Amylase and pectinase from single source for simultaneous desizing and scouring. Indian J Fibre Text Res 2007, 32(4), 459-65.

A wild type bacterial strain isolated from soil rhizosphere has been used to produce nmylase and pectinase in a common production media. Single step combined enzymatic desizing and scouring of grey cotton fabric using these enzymes have been done without further purification. The formulated media containing both the enzymes gives higher weight loss and absorbency compared to the commercial enzymatic desizing. The absorption coefficient alter treatment with formulated media is found to be similar to that observed after the conventional desizcd-scoured fabric treatment. It is observed that the study would improve textile processing in terms of ecofriendliness coupled with conservation of time energy and chemicals.

1 illus, 5 tables, 21 ref

001905   Behera B K;Mishra R (Textile Technology Dep, Indian Instute of Technology, New Delhi-1100 016, Email: behjera@textile.iitd.ernet.in) : Effect of crease behaviour, drape and formability on appearence of light weight worsted suiting fabric. Indian J Fibre Text Res 2007, 32(3), 319-25.

The total appearance value has been correlated with the crease retention property, drape and formability measured using the simple testing procedures. Fabrics with a low crease recovery angle can tolerate a lower level of formability and have acceptable appearance. However, the fabrics with a larger crease recovery angle require a higher level of formability to achieve the same acceptable appearance.

4 illes, 3 tables 9 ref

001904   Behera B K;Mani M P (Textile technology Dep, Indian Institute of Technology, New Delhi-110 016, Email: behera@textile.iitd.ernet.in) : Characterization and classification of fabric defects using discrete cosine transformation and artificial neural network. Indian J Fibre Text Res 2007, 32(4), 421-26.

Images of woven fabric defects are gathered using charge coupled device imaging technique and digitized. Discrete cosine transformation (DCT) technique is adopted to charncterize the delects and back propagation algorithm based artificial neural network is used to classify the various fabric defects. DCT technique is found to give outstanding results for classification of fabric defects. The comparatively high prediction error in one or two cases may be due to the insufficient information about the particular defect from the coefficients of that defect.

5 illus, 1 table, 12 ref

001903   Balachandran S;Rudramoorthy R (School of Energy, P.S.G. College of Technology, Coimbatore-641 004) : Energy efficiency evaluation in some non-conventional textile dyeing techniques. J Text Ass 2008, 69(3), 133-9.

Textile wet processing consumes a considerable amount of energy, water and chemicals. The increased energy use in wet processing sector is due to increasing demand for both knitted and woven fabrics. It has become necessary to look for energy efficient techniques which use less energy, water, chemicals, etc. Use of more water in the form of high liquor ratio and also in washing requirement leads to more effluent and effluent disposal becomes a major concern. experimental study has been made to evaluate the energy efficiency in different non-conventional textile dyeing techniques. The non-conventional techniques considered here are ultrasound dyeing, microwave dyeing, infrared dyeing and magnetic stirred hot plate dyeing. The experimental results are analyzed to compare the dye uptake. Based on the dye uptake, the specific energy consumption figures in these techniques are compared with conventional dyeing. The operating variables like time, temperature and concentration are varied to know the effect of these variables on specific energy consumption. From the results, it has been observed that new techniques like ultrasonic, infrared and microwave are showing higher energy efficiency and lesser pollution than the conventional dyeing process. The dyed fabric has the same or better quality as in the conventional dyeing.

3 illus, 3 tables, 7 ref

001902   Badier Rahman S M;KamalUddin Md;AlamgirSayeed M M;AbdusSamad Md;Rahman M A (Biochemistry and Molecular Biology Dep, Jahangirnagar Univ, Saver, Dhaka 1342, Bangladesh, Email: aminurbd@gmail.com) : Crosslinked dyed jute carpet pile yarns. Indian J Fibre Text Res 2007, 32(4), 477-80.

Jute carpet pile yarns have been trealed with Indosol E-50 powder, dyes and magnesium chloride hexahydrate (MgCl₂.6H₂O) catalyst, and both treated (crosslinked dyed) and untreated yarns are used to prepare jute carpets in a mill. Several carpet parameters, such as thickness recovery, compression recovery, work of recovery, tuft withdrawal force and moisture content, of the treated carpet samples have been studied and compared with those of the untreated carpet of the same pile higlit. Show improvement in the performance characteristics of the crosslinked dyed jute carpet.

3 tables, 10 ref

001901   Alagirusamy R;Dgale V;Bhowmick M (Textile Technology Dep, Indian Institute of Technology, New Delhi-110 016, Email: alagiru@gmail.com) : Air flow behaviour in commingling nozzles and their influence on properties of commingled yarns. Indian J Fibre Text Res 2007, 32(4), 414-20.

Two types of commingling nozzles have been used to study the air flow behaviour inside the nozzle and their effects on conimingling performance of glass/nylon yarns. The air flow behaviour has been analysed with computational fluid dynamics software FLUENT 6.1 and actual air flow velocities are calculated using measured air pressure. It is observed that there is a good correlation between the simulation and the measured air flow pattern. The air flow pattern in the Nozzle-1 configuration shows more turbulent zones than that in Nozzle-2. The commingled yarn properties also clearly indicate that the effectiveness of comminaline is much better with Nozzle-1 configuration than that with Nozzle-2 confimiration.

10 illus, 13 ref

001900   Adivarekar R V;Kanoongo N V;Manjrekar S G; Teli M D (Fibres & Textile Processing Technology Dep, ICT, Matunga, Mumbai-400 019, Email: ravi@udct.org) : Application of natural dyes on modified nylon, nylon and silk - "Indian madder". J Text Ass 2008, 69(3), 102-12.

Describes the possibility of dyeing modified nylon (MN) with Indian Madder, which is brilliant red in colour. The two polyamide fibres namely silk and nylon were also dyed with Indian Madder and the results were compared with dyed MN, as it intends to substitute silk fibre. The dyeings were subjected for analysis in terms of Tristimulus and CIELAB values as well as their performance properties.

3 tables, 3 ref

000999   Dutt D;Tyagi C H;Malik R S (Paper Technology Dep, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur-247 001, Email: dharm_dutt@rediffmail.com) : Studies on effect of growth factor on morphological, chemical and pulp and paper making characteristics and its impact on fluff generation. Indian J chem Technol 2007, 14(6), 626-34.

The dearth of cellulosic fibers has compelled the paper technocrats to search for high yielding and fast growing trees. Leucaena leucocephala has solved the manifold purposes of both farmers as well as paper manufacturers. However, paper manufacturers face the serious problem of fluff in the drying section of paper machine with this furnish. L. leucocephala of the same species was cut after 2. 3 and 4 years and was analyzed for, morphological, chemical and pulp evaluation characteristics. The fibers of 2 and 3 years old of L. leucocephala are immature and consist of more non-fibrous elements i.e. vessels and parenchymatous cells. When such type of fibers are subjected to mechanical attrition for removal of primary wall, cause more fiber cuttings instead of fibrillation. The primary wall is permeable to water but docs not participate in bond formation. These non-fibrous elements have larger surface area than fibers and their presence affects fiber bonding adversely. The loosely bonded fibers from the paper sheet adhere on press rolls or dryers during sheet making and contribute to fluff problem. L leucocephala cut after 4 years of cultivation docs not show fluff problem because of complete cellulose formation of fibers.

2 illus, 8 tables, 17 ref

000998   Chaudhary H;Saha S K (Mechanical Engineering Dep, MLV Textile and Engineering College, Bhilwara-311 001, Email: himanshubhl@rediffmail.com) : Dynamic performance improvement of a carpet scrapping machine. J scient ind Res 2007, 66(12), 1002-10.

Dynamic performance improvement like less vibration, smooth motor torque requirement, etc. of a carpet scrapping machine to enhance productivity and quality of Indian hand knotted carpets is presented. A complete dynamic analysis is carried out, along with optimum balancing of shaking force and shaking moment of machine. Inertia properties of machine are represented by dynamically equivalent systems, equimomental systems, of point-masses to identify design variables, and formulate associated constraints. Mass redistribution and counterweights are suggested methods to improve dynamic performances of existing carpet scrapping machine.

8 illus, 3 tables, 16 ref

000997   Bhaskar N;Sakhare P Z;Suresh P V;Gowda L R; Mahendrakar N S (Central Food Technological Research Institute, , Mysore-570 020, Email: bhasg3@yahoo.co.in) : Biostabilization and preparation of protein hydrolysates from delimed leather fleshings. J scient ind Res 2007, 66(12), 1054-63.

Wet leather fleshings (LFs) from sheep and goatskins had high alkaline pH (12.1) and ash (18.1%) due to liming of fresh skins for leather production. Treatment of limed fleshings with 0.1% H₂O₂ (1:10 v/v) followed by 0.2 MCI (1:10 w/v) solutions produced very little or no H₂S. Delimed fleshings, mixed with 19.5% (v/w) Pediococcus (iciclolactici culture, 20% (w/w) sugar and 2% (w/w) common salt, on fermentation at 30±2°C yield silage (protein 7%, fat 8% and ash 3.6%), which can be used in animal feeds. Optimized conditions (enzyme, 1.5% v/w of Protex-6L: temp., 55°C: hydrolysis time, 180 min) for liydrolyzing delimed LFs were determined by RSM. LFs yield white hydrolysate (yield, 3.5%; nitrogen, 12.4%; and fat, 1.5% w/w), which can be used in aquaeulture and animal feeds to supplement arginine, phenylalamine and tyrosine.

5 illus, 10 tables, 35 ref