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This study investigated different dyeing conditions for a cross bobbin acrylic cotton blend yarn, with the aim of identifying, through the bleaching of cotton fiber. Interference from the addition of softener regarding the tone difference across the bobbin, especially the inner end, was also studied. With these dyes, the concentration profiles of the basic dye and the reactive dye were determined and it was found that the dyeing of acrylic fibers is governed by pseudo-first order kinetics while dyeing cotton fibers fits well with pseudo-first and second order kinetics. For the dyeing of acrylic fibers, the direction of bath circulation did not affect the intensity of thread color. The best results for color intensity were obtained with mercerized yarn bobbins. There was a trend toward higher color intensity at the inner end of the bobbin when softener was added. This occurred due to the higher flow velocity inside the bobbin. [ABSTRACT FROM AUTHOR]

Activated carbon web is prepared by controlled pyrolysis of acrylic fibrous waste under the layer of charcoal using physical activation in high-temperature furnace. The carbonization was carried out at 1200 °C under different heating rate (i.e. 150 to 450 °C h-1) with different holding time (i.e. 0 to 60 min) to decide optimum pyrolysis parameters. The heating rate of 300 °C h-1 with no holding time revealed higher specific surface area of 280 m2 g-1. The prepared activated carbon web was later employed as adsorbent for removal of methylene blue from aqueous media. The effect of initial dye concentration, adsorbent dosage, stirring speed, and pH of solution was studied. The obtained results were later compared with adsorption isotherms (i.e. Langmuir and Freundlich). The Freundlich model was found to fit closely with results due to heterogeneous adsorption of dye molecules. Finally, virgin activated carbon and dye adsorbed activated carbon were tested for desorption behavior using differential scanning calorimetry and thermo gravimetric analysis. The significant reduction in desorption enthalpy from 172.46 to 52.43 J g-1 is attributed to less adsorption energies of dye molecules on the surface of activated carbon due to nonhomogeneous distribution of active sites. [ABSTRACT FROM AUTHOR]

This study aims to optimize coincidentally main characteristics of acrylic high-bulked yarns, including yarn specific volume and tensile strength, using Taguchi method. Therefore, the L27 orthogonal arrays were used to design factors of production process of the high-bulked yarns such as percentage of shrinkable fiber, yarn count, yarn twist factor, relaxation temperature, and relaxation time. Based on the designed method, signal-to-noise (S/N) and overall evaluation criteria (OEC) techniques were employed for individual and coincident optimization of two studied characteristics, respectively. The S/N ratios and the OEC values were calculated and then, analysis of variance was conducted to analyze the experimental results. The optimum conditions to achieve maximum magnitude of yarn specific volume and tensile strength were determined, in addition to contribution percentage of each factor. [ABSTRACT FROM AUTHOR]

Mixture spinning aims to bring together the best properties of two or more fiber types into one single yarn. In mixture spinning, while some fiber types have impacts to increase the yarn strength, the other fiber types may have impacts to improve the yarn unevenness values. In this study, it is aimed to obtain a regression model that predicts the unevenness (CVm%) of polyester/viscose/acrylic (PES/CV/PAN)-blended OE-rotor spun yarns. For this purpose, the methods of statistical analysis as analysis of variance and Combined Analysis were used. In the context of experimental design, basic parameters affecting the yarn unevenness were selected as: the type of fiber mixture (by carding machine or drawframe), blend ratio (from 0 to 100% at five different rates), and the yarn count (24, 30 and 36 tex). As a result, a statistically significant (p = 0.05) model has been established to estimate the unevenness of PES/CV/PAN blended OE-rotor yarns. In addition, two-dimensional surface graphics have been created to view CVm% values according to the fiber ratios in ternary mixtures. For all of the yarn samples, the increase in acrylic ratio has been found to have positive impact on the CVm% values. [ABSTRACT FROM PUBLISHER]

Various methods can be utilized in manufacturing acrylic fibers; one of them is the dry spinning process. There are many parameters in this method and the relations between them are nonlinear, since the complexity of the process is high. In this study, to predict the behavior of the dry spinning process different parameters such as temperature for various sections, time, and material properties were measured. The color index of the manufactured fibers was considered as a quality index. Using statistical methods, the parameters that affect the color index the most were determined. In the next step, in order to reduce effects of noise and complexity of the patterns, the collected data were clustered into subpopulations through Kohonen neural network. Then, adaptive neuro-fuzzy inference system (ANFIS) was used to predict the color index. In order to achieving ANFIS with the highest accuracy, genetic algorithm was employed to determine ANFIS parameters. Moreover, obtained results from ANFIS were compared with the linear regression model and it was found that ANFIS can predict the color index with higher accuracy using clustering. [ABSTRACT FROM AUTHOR]

The differential solubility of man-made cellulosic fibres in zinc chloride/formic acid dissolutions has been studied. This technique of characterisation of the fine structure has been applied to substrates of different families of cellulosic man-made fibres such as viscose (staple and filament), modal, polynosic and lyocell fibres. The developed technique has allowed the detection of the fine structure differences in substrates of different families of man-made cellulosic fibres, and even in substrates of the same family and/or form of presentation (staple fibre, filament yarn). [ABSTRACT FROM AUTHOR]

The present work is concerned with the study of the characteristics of plain woven fabric produced with cotton-acrylic high-bulk yarns from different spinning technologies. The effects of different factors, namely spinning technologies (ring, rotor and DREF-II, i.e. Group A fabrics), position of shrinkable acrylic feed sliver in DREF-II friction spinning system (Group B fabrics) and proportion of shrinkable acrylic core fibre in core-sheath type DREF-III friction spun yarns (Group C fabrics) on various properties of cotton-acrylic blended bulked yarn fabrics have been reported. The influence of these three variables on the mechanical, handle and comfort properties of fabrics have been studied. The properties of fabrics made of bulked yarns from different spinning technologies are found to be different from the normal 100% cotton yarn fabrics in all respect. Even though the bulked yarns were used only in weft direction, the fabrics with modified yarn structures show appreciable improvement in thermal resistance, moisture vapour transmission, wicking and air permeability. The bending rigidity of the fabrics in weft direction also reduced with improvement in crease recovery in weft direction. [ABSTRACT FROM AUTHOR]

This paper reports the transmission characteristics, i.e. air permeability, thermal conductivity and moisture vapour transmission, of needle-punched non-woven fabrics made from shrinkable and non-shrinkable acrylic blends. The basic idea of this work is to explore the possibility of structural changes in needle-punched non-woven fabrics made from blends of shrinkable and non-shrinkable acrylic-fibres, as in case of an acrylic bulked-yarn. The effects of variables, namely fabric mass per unit area, needling density and the proportion of shrinkable acrylic-fibre in the blend, on various transmission-related properties of needle-punched non-woven fabrics have been studied by relaxing shrinkable component of the fabric using hot steam treatment. A three-variable factorial design technique proposed by Box and Behnken was used to investigate the combined interaction effect of the above variables on transmission properties of these fabrics. Shrinkable acrylic proportion found to have significant effect on transmission properties after steam treatment. [ABSTRACT FROM AUTHOR]

A common problem in the production of core-spun yarns on the ring spinning frame is slippage of the staple sheath fibres relative to the core. This effect is known as 'strip-back' or 'barberpole', which may lead to incomplete core coverage and result in end-breaks in subsequent processing. The present work is an attempt to reduce the slip-back and improve yarn quality. The system, three-strand modified method, employs three strands of sheath fibres and three core filaments on a modified ring frame. For the experimental work, multi-filament nylon strands were used as the core and acrylic staple fibres as the sheath components. For the sake of comparison, the same materials were used to produce core-spun yarns by conventional ring and Siro systems. The test results indicate that the yarn produced by three-strand modified method has superior physical and mechanical properties in comparison to the ring and Siro core-spun yarns counterparts. [ABSTRACT FROM AUTHOR]

Pills are formed by entangling fibres into discrete balls on the surface of fabrics which are usually the result of wear, abrasion, washing or a combination of all three. In the present study, the effect of initial modulus of fibres on the pilling of woven fabrics was investigated. For this purpose, non-shrinkable (regular) and shrinkable (high bulk) acrylic fibres which have different initial modulus, were used. By using different percentages of them, five kinds of yarn were produced. Twill woven fabrics (T 1/2 z1) produced from these yarn were tested on ICI pilling box tester. Results of pilling test performed on the sample showed that by increasing the percentage of non-shrinkable (regular) fibres with high initial modulus, the tendency of fibres to leave the structure of yarn increases and they will present on the surface of fabrics as pills. [ABSTRACT FROM AUTHOR]

The effects of different factors, namely spinning technologies (ring, rotor and DREF-II, i.e. Group A yarns), position of shrinkable acrylic feed sliver in DREF-II friction spinning system (Group B yarns) and proportion of shrinkable acrylic core fibre in core-sheath type DREF-III friction spun yarns (Group C yarns) on various properties of cotton-acrylic-blended bulked yarns have been studied, The bulk in the yarns was developed by relaxing shrinkable acrylic component of the yarns using boiling water treatment. All the above factors have a significant impact on various properties of cotton-acrylic blended bulked yarns. For all the yarns, after boiling treatment, there is lengthwise shrinkage of yarns and the specific volume also increases. Tenacity and breaking elongation of all the yarns of Group A and Group B increase after hot water treatment, whereas in case of core-sheath type DREF-III yarns (Group C yarns) there is drop in tenacity and breaking elongation after similar treatment. In general, for all the yarns the flexural rigidity of the yarns reduces and compressibility and compressional recovery of increases after bulking treatment. [ABSTRACT FROM AUTHOR]

This paper reports the compressional characteristics of needle-punched non-woven fabrics made from shrinkable and non-shrinkable acrylic blends. The basic idea of this work is to explore the possibility of structural changes in needle-punched non-woven fabrics made from blends of shrinkable and non-shrinkable acrylic fibres, as in case of an acrylic bulked-yarn. The effects of variables, namely fabric mass per unit area, needling density and the proportion of shrinkable acrylic fibre in the blend, on various compression-related properties of needle-punched non-woven fabrics have been studied by relaxing shrinkable component of the fabric, using hot steam treatment. A three-variable factorial design technique proposed by Box and Behnken was used to investigate the combined interaction effect of the above variables on compressional properties of these fabrics. Before steam treatment, the needling density and mass per unit area have significant effect on the compression, recovery and resilience parameters of the needle-punched non-woven fabrics but shrinkable acrylic does not have any significant effect before steam treatment. But after the steam treatment, the proportion of shrinkable acrylic also has considerable effect on these parameters. [ABSTRACT FROM AUTHOR]

The present work is concerned with the study of the twist structure of open end and core-sheath friction spun yarns. The process variables chosen are opening roller speed, difference in spinning drum speed, suction air pressure and sheath sliver feeding position. A three-variable factorial design method proposed by Box and Behken has been used. The influence of sheath sliver position on twist structure is also studied. An analysis of the twist level and helix angle at both the trailing and leading half of the individual fibre has been carried out to quantify the twist structure of friction spun yarn. For both types of yarns the leading half of the fibres has less twist than the trailing half. Under similar conditions of spinning, the twist level of open-end friction spun yarns is significantly higher than that of core-sheath friction spun yarn. In core-sheath friction spun yarns, the core fibres have a low level of twist but have significantly higher twist near the trailing end in Z-direction. [ABSTRACT FROM AUTHOR]

High-bulk acrylic yarns which contract and increase in bulk during the heat relaxation process are produced by blending two types of fibres with different shrinking power in the spinning process. In this paper, high-bulk acrylic yarns (steamed and dyed) with different shrinkable fibre blending ratios were produced. Experimental results show that by increasing the shrinkable fibre blending ratio up to 40%, the specific volume and shrinkage of both dyed and high-bulk acrylic yarns are steadily increased while their tensile strengths are decreased. Further increasing the shrinkable fibre blending ratio causes the specific volume and tensile strength properties to decreased and increased respectively. However, the yarn shrinkage does not change significantly. It is also found that both dyed and high bulk acrylic yarns have the highest elongation at 20% shrinkable fibre blending ratio. In general, the specific volume and tensile strength of high-bulk acrylic yarns are more than those of dyed acrylic yarns but their shrinkage and elongation values are similar. [ABSTRACT FROM AUTHOR]

Fiber-blending irregularities and fiber distribution in blended-yarn cross-sections are particularly important in determining the mechanical, functional, and aesthetic properties of textile products. In the work reported in this paper, wool/acrylic blended worsted yams with a linear density of 32 tex (31 Nm), twist level of 414 tpm and with different blend ratios (75/25, 50/50 and 25/75) were produced. The digital images of yarn cross-sections with pre-dyed fibers were prepared using an optical microscope and a digital image capturing system. By applying a mathematical technique on bitmap data, the Index of Blend Irregularities, sizes of fiber clusters and preferential fiber migration were measured. The experimental results indicated a good correlation between the proposed image processing technique and that of the visual method. The index of blend irregularities and sizes of fiber clusters for wool/acrylic blended yarns were shown to range from 1.97 to 2.2 and from 3.87 to 4.88, respectively. In addition, the acrylic fibers in blended yarns were preferentially positioned in outer layers of the yarn cross-section. [ABSTRACT FROM AUTHOR]

Part I of (his series described the principle of using air-jet technology in a tandem arrangement to produce self-twist yarn. This paper deals with the application of tandem jets to replace the self-twisting roller with computer-controlled switching. [ABSTRACT FROM AUTHOR]

In the study reported in this paper, the possibility of using air-jet technology to produce a self-twist yarn was investigated. The method adopted used four jets in tandem, i.e. two Z and two S twisters, in which a high-pressure current of air was tangentially supplied to the inner surface of the yarn passage to create a vortex by which a strand of fibre was twisted. [ABSTRACT FROM AUTHOR]

Woollen slubbings are the product of the woollen carding machine and are formed by a rubbing action after the carded web has been split into narrow ribbons of fibre in the condenser section of the machine. The individual effects of different rubbing settings on the strength of the slubbing are investigated, and the importance of the apron spacing between the two rubbing surfaces is highlighted. It is also indicated that higher slubbing strength is associated with increased yarn strength. Two novel methods of measuring the fibre orientation in the woollen slubbing are outlined, and it is shown that the fibre orientation in the woollen slubbing improves with increases in the rubbing frequency, stroke length and decreases in the apron spacing. [ABSTRACT FROM AUTHOR]

Three commercial acrylic fibres from different manufacturers were employed in preparing 100% relaxed (N), 100% retractile (R), 45% N/55% R, and 55% N/45% R substrates. These were subjected to different bulking treatments (boiling water for periods of 15, 30, and 90 min and dry heat). The resulting substrates were tested for differential solubility in a blend of dimethylforamide/water to study their micromorphological evolution. [ABSTRACT FROM AUTHOR]

An investigation is reported in which factorial experiments were conducted to study the influence of the design of the yarn-withdrawal tube (or nozzle) on the diameter and hairiness of open-end-spun acrylic-fibre yarns. Three nozzle types, combined with three values of yarn linear density and five values of twist multiplier, were studied for four different (but equal-diameter) rotor types, lt is shown that the nozzle type has very little influence on yam diameter but has a more significant effect on yam-hairiness parameters. As the nozzle diameter increases, yam hairiness also tends to increase, but, when the nozzle is grooved, an interaction is produced between yarn friction and the false twist generated that leads to a yarn that is less hairy when tested on the Digital ITQT Hairiness Meter, The principle of measurement of the apparatus used can lead to different results and trends when applied to this problem. [ABSTRACT FROM AUTHOR]

An account is given of the determination of the thermophysiological properties of two blankets, one made from wool and the other from an acrylic-fibre-cotton blend but otherwise matched in weight and fibre diameter, by laboratory measurements as well as by climatic-chamber tests with human subjects. The tests show that the blanket made from wool confers a higher degree of thermal insulation and possesses better moisture-transport properties under stationary conditions, combined with better moisture absorbance and buffering capacity under transient conditions, than the blanket made from the acrylic-fibre-cotton blend. Consequently, in the climatic-chamber tests under warm and humid conditions, the test persons subjectively preferred the woollen blanket for its thermophysiological comfort. [ABSTRACT FROM AUTHOR]

This report sets out and gives examples of the use of simple methods for characterizing man-made fibres that can be carried out in industrial laboratories. It is restricted to those man-made fibres most commonly used currently in blends with wool. i.e., polyester, polyamide, and acrylic fibres. [ABSTRACT FROM AUTHOR]

The article presents several developments in the study of yarn hairiness. It includes methods for hairiness measurement such as the use of laser rays diffractometry, Digital Hairiness Measuring Instrument developed by F. Fritz and Fibrograph and yarn-spinning process such as the Dref II spinning system. Fibre length and fineness are the two fibre properties that affect yarn hairiness. The hairiness of singles and two-ply wool-polyester fibre and wool-acrylic fibre yarns have been studied using a digital hairiness meter, as well as the singles of cotton and rotor-spun yarns.

An investigation is reported of the effect of factors such as rotor diameter, rotor speed, and twist multiplier of acrylic-fibre open-end-spun yarn on the main yarn parameters, such as tenacity, elongation at break, irregularity, and quality index. Factorial experiments were used as the basis of the study. It is shown that, except for the influence of yarn twist, owing to the different characteristics of twist-strength curves and twist-elongation-at-break curves, the results are very similar to those from an earlier study on cotton yarns. For tenacity, the linear effects of yarn twist and rotor diameter and the quadratic effect of the latter are significant, there being no significant interactions. For elongation at break, the linear effects of rotor speed and rotor diameter and the quadratic effect of the latter are significant. There are several significant interactions. Not all of these present possibilities of being real interactions, some appearing to be chance interactions. Irregularity is significantly influenced by the linear effects of rotor speed and rotor diameter and quadratic effect of the latter. It is shown that one interaction could be real. For the quality index, the linear effects of both yarn twist and rotor speed appeared significant, but both the quadratic effect of rotor diameter and some interactions involving this parameter that turned out to be significant are possibly only chance effects. [ABSTRACT FROM AUTHOR]

Exposure to full, natural weathering over a period of about a year is shown to have caused changes in the shape of the stress-strain curves for yams extracted from cordage made from nylon 6.6 and from aramid acrylic, polyester, and polypropylene fibres. The curves for the weathered nylon and aramid fibre were considerably truncated. Over-all, the stress-strain curves for the acrylic-fibre yams were the least truncated by weathering but most affected by water. [ABSTRACT FROM AUTHOR]

A study is reported of a commercial print-bonded non-woven fabric (Keybak), made of viscose staple fibres arranged to contain a pattern of elliptical holes and print-bonded by acrylic latex in strips. An analytical model based on the structural features and using a composite-materials approach was employed to interpret the experimental measurements of the bending stiffness ot the fabric. The grouping of the fibres in the fabric into straight and severely curved ones permits freedom of relative fibre motion among curved fibres and requires only the straight fibres to resist the bending moment. [ABSTRACT FROM AUTHOR]

The effects of single-pass calendering on the decrease in fabric thickness of a range of needle-punched fabrics composed of polyester, acrylic, and regenerated-cellulose fibres are reported. The effects of bowl load, bowl speed, and top-bowl temperature were studied in detail. Calendering conditions that promote fibre plasticization lead to high levels of fabric consolidation and to a reduced rate of fabric recovery from deformation. In the calendering of wet fabrics, fibre-swelling can influence the fabric-consolidation process, particularly for regenerated-cellulose-fib re fabrics. [ABSTRACT FROM AUTHOR]

The relation existing between the twist and resistance to repeated extensions of man-made-fibre rotor-spun yarns is studied. Experiments on acrylic-fibre, polyester-fibre, and viscose staple-fibre rotor-spun yarns are reported, and it is shown that, for these fibres, the maximum resistance to repeated extension is consistent with generally low twist multipliers, although the level of the resistance is dependent on both the fibre type and the linear density of the yarns. Some complementary tests concerning the relation existing between twist and tensile strength for cotton, polyester-fibre, and acrylic-fibre rotor-spun yarns are also reported. It is shown that, whereas for cotton yarns the twist for maximum strength is found for a high twist multiplier, for man-made-fibre yarns the optimum twist occurs at low values of the twist multiplier. [ABSTRACT FROM AUTHOR]

The optimization of the opening-roller speed in open-end spinning is studied for a given type of fibre, and the effect on the yarn properties of suppressing one drawframe passage is considered. The experiments carried out with acrylic fibre show the existence of an optimum zone for the speed of the opening roller and also indicate that the suppression of a drawframe passage in the normal industrial process leads to a drop in yarn quality that principally affects the regularity and influences both the tenacity and the elongation at break of the yarn to a less extent. [ABSTRACT FROM AUTHOR]

An investigation is described in which infra-red spectroscopy was applied to binary mixtures of cotton--Acrilan and wool--Terylene by multiple-internal-reflexion techniques. Two methods of analysis of the spectra obtained were used to demonstrate the existence of statistically highly significant relationships between fibre proportions in the blend and the absorbance of selected absorption bands. The results obtained indicate that the methods used are eminently suitable for the quantitative analysis of mixtures of cotton--Acrilan and wool--Terylene of unknown blend proportions. [ABSTRACT FROM AUTHOR]

A method for measuring the variance between ultra-short lengths of yarn is presented and shows that the reported flattening of the B(L) curve to a constant value in the 5(0) region does not occur at lengths of down to at least 0-1 cm. The curve continues to rise logarithmically as the length decreases, possibly as far as 0· 045 cm, though detection imperfections render readings at this length open to some doubt. Yarn irregularity is shown to be strongly dependent on fibre length and on yarn fineness, particularly at short test lengths, and the possibility of periodicities at less than 1-cm ‘wavelengths’ is shown to exist. [ABSTRACT FROM AUTHOR]

This paper is intended to supplement one published in 1966 containing a survey of the literature on yarn hairiness, and the review of the literature is brought up-to-date at the time of writing. A new electronic instrument for measuring yarn hairiness is outlined. This apparatus enables three parameters to be obtained directly and simultaneously, these being hairiness, hair length, and yarn diameter. [ABSTRACT FROM AUTHOR]

An account is given of a study of the extent to which fibres were pulled through the web during needling that was made by incorporating one layer of coloured fibres at various positions in a 50-layer web. The number of needle locations at which tracer fibres appeared and the number and length of fibres were determined. Further studies of the occurrence of interlocking loops on the surface of a needled fabric are reported. [ABSTRACT FROM AUTHOR]

An account is given of the measurement of the transverse deformation of fibres under various loads acting normal to the fibre longitudinal axis by a technique in which fibres are interleaved between glass plates in a vertical stack. Graphs of transverse load against compression are plotted for nylon, acrylic, and viscose rayon fibres under both air-dry and wet conditions. An expression for the transverse deformation in terms of the applied load is proposed and used to calculate the lateral-compression moduli of the various fibres. The results show that, laterally, nylon fibres in both wet and dry states have the highest modulus and that acrylic fibres appear to be least affected by immersion in water. Viscose rayon fibres are most affected by water and experience a reduction in modulus by a factor of about 20. [ABSTRACT FROM AUTHOR]

An account is given of an investigation of the effects of fibre type (rayon, acrylic fibre, wool, and cotton) and dimensions on the properties of needled fabrics, the test methods used being those described in a previous paper. Some fabrics show a stick-slip behaviour in extension; others deform smoothly. Rayon webs — consolidate more easily on needling than Courtelle or wool webs. Longer fibres give higher fabric strengths. Finer fibres also give higher strength, unless fibre damage occurs. The influence of fibre friction is discussed. [ABSTRACT FROM AUTHOR]

An account is given of experiments in which samples of carpet are held under a vertical load while immersed in an acrylic resin of low initial viscosity. After the resin has set, thin sections are cut perpendicular to the carpet backing, which enables measurement to be made of the bending strains in the carpet. Bending strains as high as 0-1 are obtained, and the possible relevance of these values to those arising during normal carpet wear is discussed. [ABSTRACT FROM AUTHOR]

The article reports on the use of Almeter to measure the change in fiber length before, and after steaming the fabric. It states that it is easy to determine the fiber shrinkage of an acrylic-fibre after it is steamed with the value comparable to top shrinkage but requires smaller sample. The commercial samples tested include the Eurocril form Italy, Crysel from Mexico and Cashmilon from Japan. It offers an overview of the test methods and results of the experiment. It concludes that the test of fibre shrinkage using Almeter is much preferred that the top-shrinkage test since it can be used to other textile fibers and quicker and easier to use.

The article presents the deviation of measured twist from the machine twist in rotor-spun yarns. The deviation of the measured twist of rotor-spun yarns below the machine twist is a well-known fact that is particularly evident on rotor-spun acrylic-fiber yarns. The yarns were produced on a BD200 machine under a variety of spinning conditions involving the use of four rotor types together with three nozzles. The spun yarns densities and the given series of twists above and below the twists recommended in practice were mentioned. Furthermore, the effect of machine twist and yarn linear density on the measured twist deviation are offered.

A letter to the editor that focuses on a study on the birefringence of steam-stretched acrylic fibers is presented.

The article reports on the elastic and crystalline properties of a selection of acrylic fibers produced in Turkey. The degree of crystallinity of fibers is calculated by using measured density values. The use of X-ray diffraction method and infrared spectroscopy are being carried out on acrylic fibers produced in Turkey to obtain more information in working out of an inner structural model for short-cut acrylic fibers.