共查询到20条相似文献，搜索用时 46 毫秒
1.
Vinay Kumar Midha V. K. Kothari R. Chattopadhyay A. Mukhopadhyay 《Fibers and Polymers》2010,11(4):661-668
In this paper artificial neural network (ANN) model has been designed to predict the strength loss in threads during high
speed industrial sewing. Four different types of threads (Mercerized cotton, polyester staple spun, polyester-cotton core
spun and polyester-polyester core spun) were taken for the study. The other input parameters include thread linear density,
fabric area density, number of fabric layers, stitch density and needle size. In order to reduce the dependency of the results
on a specific partition of the data into training and testing sets, a four-way cross validation tests were performed, i.e.
total data was divided into training and testing set in four different ways. The predicted tenacity loss was correlated to
the experimental tenacity loss and correlation coefficient between the actual and predicted tenacity loss obtained. It was
observed that the neural network system is able to predict the tenacity loss of threads after sewing with good correlation
and less average error. The relative contribution of each parameter to the overall prediction of the tenacity loss was studied
by carrying out the sensitivity analysis of the test data set. The results of sensitivity analysis show that thread type is
the most important input parameter followed by thread linear density, number of fabric layers, fabric area density, needle
size and the stitch density. 相似文献
2.
Study on the characteristics of blended ring and rotor spun yarns is a topic of major interest to the researchers. The overall properties of these blended yarns are affected by the relative proportion, properties of the components and their interactions. The main focus of this work is on comparing and analyzing effects of blend ratio on tensile properties of the yarns produced in different spinning systems using concept of hybrid effects that has not received enough attention from researchers. Various blends of cotton-polyester ring and rotor spun yarns were prepared. Tensile properties of the samples were examined as well. Interactions between cotton and polyester fibers was evaluated through predicting strength and elongation at break of the yarns using simple rule of mixtures (ROM) and hybrid model. Experimental results showed that, the effect of different blend ratios on tensile properties of the samples is different. In comparison with 100 % cotton yarn, promotion in braking strength of the ring and rotor spun samples occurred after increasing fraction of the polyester fiber to 50 and 66.5 % respectively. The prominent finding of the present work is that the trend of change in tensile properties of different yarns versus blend ratio is predictable via hybrid model and migration behavior of the constituent fibers. Coefficients representing the intensity of the interaction and migration index of the fibers were calculated and all results were discussed based on these calculated factors. 相似文献
3.
The purpose of this study is to objectively evaluate the seam pucker as a fabric formability and to analyze the effects of
the fabric structural and sewing parameters to the seam pucker properties of the worsted and wool/polyester blend fabrics.
The seam pucker of the worsted and wool/polyester blend fabrics according to the different types of fibre composition were
surveyed by measuring fabric mechanical property using KES-FB and FAST systems and also seam puckering test was conducted
by objective and subjective methods. In addition, the effects of fabric structural and sewing parameters to the seam pucker
were investigated using statistical analysis. It was revealed that the effects of fabric structural parameters to the seam
pucker were dominant than those of sewing machine conditions. It was shown that low pressor foot pressure and shuttle tension
make good seam pucker, and high sewing speed and shuttle tension make bad seam pucker. And it was also shown that the precision
on estimating of the seam pucker by KES-FB system was much higher than that of FAST system. And seam pucker values between
objective and subjective methods showed good correlation. 相似文献
4.
Andreja Rudolf Jelka Geršak Anna Ujhelyiova Majda Sfiligoj Smole 《Fibers and Polymers》2007,8(2):212-217
The properties of 100 % PES core-spun threads were studied before and after the sewing process at different stitching speeds,
by determination of the threads tensile force during the sewing process and by changes of the mechanical and thermo-mechanical
properties after the sewing process. This analytical method is especially advantageous when monitoring contemporary thermal
and mechanical effects, as is the case when loading the sewing thread. Loadings during the sewing process cause structural
changes in the thread-twisted fibres. This is confirmed by changes in the thermo-mechanical properties after the sewing process.
Simultaneously, changes in the threads mechanical properties after sewing were also observed. 相似文献
5.
Akbar Khoddami Shima S. Shokohi Mohammad Morshed Dariush Abedi 《Fibers and Polymers》2011,12(5):635-641
Textiles, especially those made of natural fibers, are suitable medium for the growth of microorganisms which causes disease
transmission, stink, colorful spots, and reduction in fabric strength. This research focuses on the antimicrobial finishing
of cotton fabrics using colloidal solution of silver nanoparticles. Due to the difficulties of adding a new step to the finishing
process of cotton textiles, efforts have been made to combine the antimicrobial treatment with the conventional finishing
processes. For this purpose two chemical finishes of Fixapret ECO as a crosslinking agent and Cellofix ME as a resin former
have been used in anti crease finishing of cotton fabric and their effects were evaluated. The properties of the samples have
been investigated by measuring the resistant of samples against bacteria, crease recovery angle, abrasion, and washing fastness.
The results showed that treated samples by pad-dry method have the best antibacterial effect with a direct relation between
the increase in drying temperature and antibacterial properties. However, the washing and abrasion fastness were not at the
acceptable level. Co-application of the colloidal solution of silver nanoparticles with the crease resistant materials improved
both fastness properties while at the same time limited the direct contact between the nanoparticles and the bacteria so the
antibacterial efficiency was reduced. Subsequently, it was concluded that the antibacterial finishing method should be selected
according to the end uses. In addition, antibacterial treatment could be one of the multi-purpose finishes for cotton fabric. 相似文献
6.
A commercially available polyester resin was reinforced with cabuya fibers. The experimental variables were the fiber loading and the length of the fiber. Tensile strength, flexural strength, and the Izod impact resistance were measured for the samples and compared to the polyester resin performance without reinforcement. Mechanical properties of the cabuya fiber reinforced material were also compared with the same resin but reinforced with glass fibers. An increase in fiber load decreases the tensile strength for the cabuya reinforced composite, where a value of 52.6 MPa corresponded to the tensile stress of the resin without reinforcement and a value of 34.5 MPa for the best reinforcement achieved with cabuya. An increase in both fiber load and length increases the Young’s modulus of the cabuya reinforced material, and a maximum value of 2885 MPa was obtained. The Young’s modulus and impact resistance values for the cabuya composite (2885 MPa and 100.87 J/m, respectively) reached higher values than those obtained for non-reinforced polyester material (2639 MPa and 5.82 J/m, respectively), and lower than the glass fiber composite (5526 MPa and 207.46 J/m, respectively); while the tensile and flexural strength obtained for the cabuya composite (34.5 MPa and 32.6 MPa, respectively) were lower than the unreinforced (52.6 MPa and 62.9 MPa, respectively) and glass fiber reinforced polyester (87.3 MPa and 155 MPa, respectively). 相似文献
7.
Wei Li Zhenzhen Xu Zongqian Wang Changlong Li Quan Feng Yanan Zhu 《Fibers and Polymers》2018,19(7):1386-1394
To investigate the effects of tertiary amination/hydroxypropylsulfonation on the adhesion-to-fibers and film properties of corn starch for warp sizing, a series of tertiary aminated and hydroxypropylsulfonated corn starch (TAHPSS) samples were prepared by the tertiary amination and hydroxypropylsulfonation of acid-hydrolyzed corn starch (AHS) with 2- dimethylaminoethyl chloride hydrochloride (DMC-HCl) and 3-chloro-2-hydroxy-1-propanesulfonic acid sodium salt (CHPS-Na) simultaneously. The adhesion was evaluated by measuring the bonding force of starch to the fibers. The film properties were investigated in terms of tensile strength, breaking elongation, degree of crystallinity, and moisture regain. The results showed that tertiary amination/hydroxypropylsulfonation was able to increase bonding forces of starch to cotton and polyester fibers, enhance breaking elongation and moisture regain of the starch film and to decrease the tensile strength and degree of crystallinity of the film, thereby improving the adhesion and reducing film brittleness. Increasing the level of tertiary amination/hydroxypropylsulfonation was favorable for gradually improving the adhesion and decreasing the brittleness. The TAHPSS showed potential for use in cotton warp sizing. 相似文献
8.
The surface morphology of the CO2 laser treated grey cotton fabrics was studied which showed a characteristics sponge-like structure on cotton fibres after
treating with CO2 laser irradiation. The laser treatment parameters ranging from 100 to 150 pixel time and 40 to 70 dot per inch (dpi) were
irradiated on the grey cotton fabrics directly and the degree of physical modifications, such as surface morphology, wettability
and fabric strength, were changed accordingly with various laser treatment parameters. The surface morphology, wettability
and tensile strength of cotton fibre treating with laser were evaluated using different instruments, such as Scanning Electron
Microscope (SEM), contact angle meter and tensile strength machine. In spite of creating a sponge-like structure on fibre
surface after treating with laser, the wettability of the samples was highly improved but the tensile strength was decreased. 相似文献
9.
S. Jayabal S. Velumani P. Navaneethakrishnan K. Palanikumar 《Fibers and Polymers》2013,14(9):1505-1514
The research on coir-polyester composites initiated the interest in the development of woven coir fiber-reinforced polyester composites. The mechanical properties of woven coir-polyester composites were evaluated as per ASTM standards and the machinability behavior was studied by conducting drilling tests in this investigation. The woven coir-polyester composites exhibited the average values of tensile, flexural and impact strength of 19.9 MPa, 31.3 MPa and 49.9 kJ/m2 respectively. The effect of NaOH treatment on the improvement of mechanical properties of woven coir-polyester composites were studied in this investigation. The 40 % increase of tensile strength, 42 % increase of flexural strength and 20 % increase of impact strength were achieved by treated woven coir fiber-reinforced polyester composites. The regression models for predicting thrust force, torque and tool wear in drilling of woven coir-polyester composites were developed and the effect of drilling parameters were analyzed. 相似文献
10.
Mazeyar Parvinzadeh Gashti 《Fibers and Polymers》2016,17(1):130-135
Compressive shrinkage or compressive shrinkage finishing is one of the most important finishing procedures in the textile industry to improve the dimensional stability of cotton fabrics. Study of the physical and mechanical properties of compressive shrinkage finished fabrics could be useful for optimizing the treatment conditions. This research was carried out in a production line of a recognized garment company on cotton woven fabrics with two different woven patterns (twill and plain). The samples were first dyed with reactive and sulfur dyes in a jigger dyeing machine and finished with a silicone softener. The dried fabrics were then processed in a compressive shrinkage machine. Several physical and mechanical properties of the samples were evaluated including area shrinkage, crimp percentage, thickness, abrasion resistance, drapeability, mechanical and colorimetric properties. The results showed that the thickness of all treated samples increased due to compressive shrinkage. The fabrics were analyzed with a Martindale Abrasion Tester to determine the abrasion resistance. Interestingly, we noted an increase in the abrasion resistance. After the compressive shrinkage process, the strength of the plain woven fabrics decreased in the warp direction, but increased for twill woven cotton fabrics. On the contrary, the strength of all samples increased in the weft direction. Colorimetric evaluation of the samples showed that the effect of compressive shrinkage on the color of all samples was negligible. 相似文献
11.
Muhammad Tayyab Noman Muhammad Azeem Ashraf Hafsa Jamshaid Azam Ali 《Fibers and Polymers》2018,19(11):2268-2277
Facile embedding of TiO2 nanoparticles onto cotton fabric has been successfully attained by ultraviolet light irradiations. The adhesion of nanoparticles with fibre surface, tensile behaviour and physicochemical changes before and after ultraviolet treatment were investigated by scanning electron microscopy, energy dispersive X-ray and inductive couple plasma-atomic emission spectroscopy. Experimental variables i.e. dosage of TiO2 nanoparticles, temperature of the system and time of ultraviolet irradiations were optimised by central composite design and response surface methodology. Moreover, two different mathematical models were developed for incorporated TiO2 onto cotton and tensile strength of cotton after ultraviolet treatment and used further to testify the obtained results. Self-clean fabric through a synergistic combination of cotton with highly photo active TiO2 nanoparticles was produced. Stability against ultraviolet irradiations and self-cleaning properties of the produced fabric were evaluated. 相似文献
12.
Spirality is one of the major potential problems in knitted fabrics and garments. It affects the aesthetics and physical properties
of the garment produced, such as the seam displacement, shape retention, pattern distortion and sewing difficulties. In this
paper, a comparative study has been carried out to evaluate the physical performance of 100 % cotton knitted fabrics and garments
produced by the modified low twist and conventional ring yarns through the actual wearing and washing trials. Experimental
results showed that the properties of side seam displacement, fabric spirality, dimensional stability and skewness change
of the T-shirts and sweaters made by the modified single yarns are comparable to those of garments made from the control plied
yarns but much improved when compared to those from the control single yarns. In addition, the pilling resistance and bursting
strength of the knitted fabrics made by the modified single yarns can still maintain a reasonably high level at a low yarn
twist. 相似文献
13.
Zulfiqar Ali Malik Noman Haleem Mumtaz Hasan Malik Anwaruddin Tanwari 《Fibers and Polymers》2012,13(8):1094-1100
Tensile strength plays a vital role in determining the mechanical behavior of woven fabrics. In this study, two artificial neural networks have been designed to predict the warp and weft wise tensile strength of polyester cotton blended fabrics. Various process and material related parameters have been considered for selection of vital few input parameters that significantly affect fabric tensile strength. A total of 270 fabric samples are woven with varying constructions. Application of nonlinear modeling technique and appreciable volume of data sets for training, testing and validating both prediction models resulted in best fitting of data and minimization of prediction error. Sensitivity analysis has been carried out for both models to determine the contribution percentage of input parameters and evaluating the most impacting variable on fabric strength. 相似文献
14.
We present a rapid, simple, convenient and cost-effective method for producing nanosized stable silver particles on cotton fibers with complete control of the silver loading level using a thermal reducing silver carbamate complex. Cotton gauze was coated with silver 2-ethylhexylcarbamate solution. Silver nanoparticles on the cotton gauze were characterized by energy dispersive X-ray spectroscopy and X-ray diffraction. Particle size and lattice image of the silver nanoparticles were studied by scanning electron microscopy. The antibacterial activity of the silver coated cotton gauze against Escherichia coli and Staphylococcus aureus, whole blood clotting and physical properties including vertical wicking test, water retention time and absorption of 0.9 % (w/v) saline were studied. Silver coated cotton gauze showed a faster blood clotting rate than the untreated cotton gauze. Cotton gauzes treated with two different silver concentrations (0.01 %, 0.1 %) showed slightly better saline absorption and they had better vertical wicking and water retention time than pristine cotton gauze. 相似文献
15.
Jung Tae Lee Myung Wook Kim Young Seok Song Tae Jin Kang Jae Ryoun Youn 《Fibers and Polymers》2010,11(1):60-66
Denim, a twilled cotton fabric, was used to enhance the mechanical and thermal properties of poly(lactic acid) (PLA). The
denim fabric reinforced composites with different numbers of denim layers were fabricated by using a hand layup method. The
impact, tensile, and dynamic mechanical properties of the composites were observed with increasing denim layers to examine
the reinforcing effect of denim fabrics. Numerical analysis was carried out to model the elastic modulus of the composite
by using a commercial software. Three-dimensional geometry of the denim fabric reinforced PLA composite was generated through
a CAD program, and the elastic modulus was calculated by applying uniform deformation on one surface. The impact strength,
tensile strength, and thermal properties of the composites were improved by piling denim fabrics. The denim fabric reinforced
composites exhibited outstanding impact strength due to the retarded crack propagation as well as large energy dissipation.
The 3 layer denim reinforced composite showed best results among all specimens, and its impact strength, tensile strength,
and tensile modulus were measured to be 82 J/m, 75.76 MPa, and 4.65 GPa, respectively. The PLA/denim composites have good
mechanical properties and can substitute traditional composites such as glass fiber or carbon fiber reinforced composites. 相似文献
16.
The aim of this study is to analyze and determine the off-axis tensile properties of air-entangled textured polyester fabrics
based on unit cell interlacing frequency. For this purpose, continuous filament polyester air-entangled textured yarn was
used to produce plain, ribs and satin woven fabrics. The fabrics were cut from the warp direction (0°) to weft direction (90°)
at every 15° increment, and tensile tests were applied to those of the off-axis samples. The strength and elongation results
were introduced to the statistical model developed, and regression analyses were carried out. Hence, the effects of off-axis
loading and interlacement on the directional tensile properties of the fabric were investigated. The regression model showed
that off-axis loading influences fabric tensile strength. On the other hand, interlacement frequency is the most important
factor for fabric tensile elongation. The results from the regression model were compared with the measured values. This study
confirmed that the method used in this study as can be a viable and reliable tool. Future research will concentrate on multiaxially
directional fabric and the probability that it will result in homogeneous in-plane fabric properties. 相似文献
17.
This paper reports on the effect of pre-tensions on needle and bobbin threads, sewing speed, thickness of fabric plies and the linear density of the threads on the tension peaks occurring on needle thread during sewing on a single needle lock stitch machine. The needle thread tensions are measured at two locations: above the needle bar (bottom segment) and above the needle thread tensioner (top segment). A factorial design approach is used to study the four parameters. The role of bobbin tension is studied in a separate experiment, while keeping the pre-tension on the needle thread constant. The highest tension observed on the needle thread is the stitch tightening tension which is directly affected by the pre-tension set on the needle thread disc tensioner. Heavier threads develop lower tightening tension which may affect the seam balance. The thickness of fabric plies does not affect the needle thread tension. Sewing speed has marginal influence on the stitch tightening tension near the needle thread tensioner. The pre-tension on the bobbin thread affects only the needle thread tension when the take up lever pulls up the needle thread loop to release it from the rotary shuttle hook gib. 相似文献
18.
This paper, the first of a two-part series, aims to find the effect of stitch length, check spring tension, fabric feed timing and needle thread in-take length on tension peaks occurring on a spun polyester needle thread during a sewing cycle of a SNLS sewing machine. The pre-tensions on the bobbin and needle threads and sewing speed were kept constant. A PC interfaced measuring instrument was fabricated to measure dynamic sewing tension on needle thread above the needle bar. Four prominent tension peaks were detected. Longer stitch length causes higher tension peaks; and shorter length stitch requires higher pre-tension to obtain a balanced stitch. The check spring tension has no effect on tightening tension. Incorrect timing of feed dog can cause very high tightening tension. The change in the position of thread length guide alters the friction of needle thread at critical guides which determines the length of thread to be released through tensioner; release of longer length of thread results in lower tension peaks (1, 2 and 4) and vice versa. 相似文献
19.
We evaluated the seam characteristics with finishing, seaming and sealing processes and seam puckering behavior of the breathable
waterproof fabrics with laser scan. There were differences in 99% significant level between the seamed fabric and the sealed
fabric. Seam breakage was initiated with the breakage of sewing thread, so the seam strength after seaming was almost uniform.
The sewn seam strength and elongation increased with sealing process in all finishing methods. Pucker grade of laminating
type was generally much higher than that of the coating type. We confirmed that wave length and amplitude have more important
meaning than the number of wave in the breathable waterproof fabrics. The puckering in breathable waterproof fabrics is mainly
occurred by inherent and feeding pucker. The former is due to the insertion of sewing thread and the latter is caused by differential
feeding when two pieces of fabric are fed into the gap between a press foot and needle plate. 相似文献
20.
In this study, the tensile strength and elongation of polyester/viscose blended needle-punched nonwovens were analyzed. For this purpose, five different blend ratios of polyester/viscose webs were produced, cross-lapped and needled in four different mass per unit areas and three different needling/punching densities. The tensile properties of the nonwovens were determined by performing the standard test methods and the data obtained from tests were statistically analyzed in Design Expert software. In addition, a mixture process crossed regression model with two mixture components (polyester and viscose blend ratios) and two process variables (fabric mass per unit area and needling density) was developed to analyze the tensile strength and elongation of polyester/viscose blended needled nonwovens. In conclusion, the regression model indicated that the tensile strength of the needle-punched nonwovens decreases with the increase of polyester proportion in the mixture and increases with the increase in mass per unit area and punching density. 相似文献