Table of Content

15 December 2014, Volume 35 Issue 12

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Effect of Cacl2 concentration on the solubility of silk fibroin in CaCl2-Formid Acid system

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  1-0. 

Abstract ( 604 )   PDF (1635KB) ( 562 )   Save

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CaCl2-Formid Acid (FA) system was adopted to dissolve degummed silk, the effect of Cacl2 concentration on the solubility of silk fibroin in CaCl2-FA was discussed. Rheological behavior, SEM, FTIR and XRD analyses were applied to characterize the silk fibroin (SF) solutions and films. The results indicated that the solubility was increased with the concentration of CaCl2 at the same dissolution temperature and time, and the speed of dissolution was higher at first than afterwards. The viscosity was increased first and then decreased in rheological curve when the concentration of Cacl2 was 2%,5%,8% and 10%, and the viscosity of solusion in Cacl2 concentration 1% was higher than others. Fibrillar structures were observed in the solution and films under SEM. The results of FTIR analysis were demonstrated the conformation of SF was β-sheet, and the concentration of Cacl2 was of little influence on the conformation. The structure of SF films were silk II confirmed by XRD results, and characterized by the presence of a broad peak in the 2θ scattering angle at 9.5°, 20.5° and 23.9°.

Research on the system of a novel polyglycolic acid nanofibers scaffold loaded drug

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  6-0. 

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Abstract: Mixing tetracycline hydrochloride (tet) with poly-(D,L-lactide-co-glycolide) (PLGA) in THF and DMF (1:1 v/v),the PLGA nanofibers membrane with tetracycline hydrochloride were prepared by electrospinning. The morphlogy were observed by means of scan electric microscope(SEM) and fluorescence microscopy. The absorbency of drug was detected by UV-visible spectroscopy, then counting the velocity of drug release. The antimicrobial activity in vitro were examined by improved Kirby-Bauer diffusion method.Cells and scaffold of the morphology, adhesion and growth were observed by SEM. The average diameter of PLGA nanofibers with different tet contents between 360nm and 470nm . The 10% drug loaded membranes exhibited the highest initial burst release. Tet release sustained over 27 days in vitro. The antimicrobial activity in vitro was effective in inhibiting Staphylococcus aureus growth. Examination of the biocompatibility of PLGA/tet scaffolds with MG-63 cells showed no adverse effect on the cell adhesion and proliferation. So PLGA/tet nanofibers has good biocompatibility.

Filtration property of PA6/PA66 electrospun fibrors membrane for dyes

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  11-0. 

Abstract ( 341 )   PDF (1526KB) ( 394 )   Save

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In order to separating dyes from dye waste water efficiently, electrospun nanofibrous membrane, which has higher surface adsorption energy and higher porosity than traditional membrane, was used as a novel membrane material to treat dye waste water. This paper has studied the filtration property of PA6/66 electrospun fibrous membrane for 0.1g?L-1 disperse blue 2BLN suspension and weak acid blue N-RL solution with dead-end filtration method under constant pressure o.1MPa. The surface morphology of PA6/66 electrospun fibrous membrane, porous structure, dye particle size and selection property also had been studied by SEM, pore size testing meter, nano-particle size testing meter and ultraviolet-visible spectrophotometer. The results shown that there was a compact cake layer on the surface of the membrane after filtered constantly for 1h, the selection to disperse blue 2BLN was 95.6% and to weak acid blue N-RL was only 35.1%, but the filtration fluxes to these two dyes were similar.

Study on dye adsorption of grafted cationic cocoon floss in printing and dyeing wastewater

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  17-0. 

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Abstract The study of cationic grafting to cocoon floss with 2,3-epoxypropyl triethylammonium chloride（GTA） and the dye absorption of the modified cocoon floss that conclude three branches of reactive dyes, two branches of acid dyes and one branch of direct dye. Through the infrared spectrum of modified cocoon floss, it shows that 2,3-epoxypropyl triethylammonium chloride is mainly grafted on the amino of cocoon floss. And the particle surface potential analysis shows that the value of modified cocoon's surface potential increases from -56.2 mV to -23.2 mV. Also the dye adsorption rate of modified cocoon floss is very fast and the value of absorption is big, especially a large number of the adsorption is completed in the first few minutes. And the decolorization rates of acid and direct dyes are bigger than reactive dyes. The cationic grafting rate of modified cocoon floss is higher, the dye adsorption capacity is greater. For example, when the grafting rate of modified cocoon floss is 0.31%~2.70%, the equilibrium adsorption values of acid dyes, direct dyes and reactive dyes are 16.0%~81.3% (g/g), 31.2%~50.6% (g/g) and 5.16%~32.4% (g/g), which shows that the modified cocoon floss has a very strong ability to absorb dyes. And also, this is a potential method of the treatment of printing and dyeing wastewater.

Synthesis of hydroxyl terminated fluorinated polysiloxane and property of its modified waterborne polyurethane

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  24-0. 

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Hydroxypropyl terminated fluorinated polysiloxane was synthesized via hydrosilylation by hydrogen terminated fluorinated polysiloxane and allyl alcohol as raw material and chloroplatinic acid as catalyst, and applied in preparing for modified waterborne polyurethane. Influence of synthetic factors on the double bond conversion were researched, the synthesis conditions were optimized, the chemical structure of synthesis product was characterized by FTIR、1H-NMR and GPC, the properties of emulsion and film of modified waterborne polyurethane and coated fabric were measured. The results showed that the side reaction inhibitor could effectively prevent for the side reaction. the optimal synthesis conditions of hydroxypropyl terminated fluorinated polysiloxane were that the dosage of side reaction inhibitor was 0.2 %, the dosage of catalyst was 60ppm, the reaction temperature was 75 ℃, and reaction time was 4 h. The particle size of the emulsion of waterborne polyurethane was 45nm, the water contact angle and the water absorption of the film were 106.8 °and 28.1 % respectively. Compared with the unmodified polyurethane, the water resistance of the fabric coated with modified waterborne polyurethane was improved significantly.

Stabbing-resistant performance of aramid fabric

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  31-0. 

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　　　In order to study the effect of various knitting structures on the stabbing-resistance performance, the plain, rib and cardigan stitch are knitted using aramid fibre and the parameters such as impact time, displacement and puncture depth are tested with the roller-recording fabric stab-resistant performance tester designed by Tianjin Polytechnic University. The results show that the rib fabric has better stabbing-resistance performance and the laying order of samples affects its stab-resistant performance also when testing multi-layer fabric; rib fabrics of more than two layers or other multi-layer fabrics of different structures can satisfy the requirement of the corresponding puncture-proof standard; the slope of straight line in stabbing-resistance testing curve can reflect the stabbing-resistance performance.

 Influence of spinning triangle shape change on ring spun yarn properties

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  36-0. 

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On the basis of diagonal spinning theory, spinning triangle shape variation model was built to analyze the influence of spinning triangle shape change on ring spun yarn properties, especially yarn hairiness; corresponding mechanism was discussed. For validating the theoretical analysis, several experiments such as conventional and diagonal spinning were conducted to get various spinning triangle change on different type ring frames respectively; spun yarns properties were comparatively studied. Experimental results indicated that yarn guidance path and twist transport were very essential to deformation of spinning triangle shapes; the diminished spinning triangle yielded yarn with improved surface and mechanical properties. In all, the experimental results agreed with the theoretical analysis.

Research on fiber tension in Sirospun spinning triangle

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  41-0. 

Abstract ( 456 )   PDF (1410KB) ( 467 )   Save

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In this paper, the fiber tension distributions in the Sirospun spinning triangle was analyzed by using the finite element method according to the mechanical properties of fibers and the feature of Sirospun spinning triangle. The effects of spindle speed, traveller and twist factor on the distribution of fiber tension in the spinning triangle were analyzed in detail. The results indicate that the spindle speed has an apparent influence on the distribution of fibers at the spinning triangle, and the relationship is closely between the fibers force and the direction of spinning tension, and the twist factor has an important impact on the structure of spinning triangle. The analysis result of FEM matching with the theory of spinning achieved the optimization of spinning processing parameters, which has some referance value to spinning practice.

Sizing effects of foam-sizing and warp pre-wetting combined process

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  47-0. 

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Aiming at overcoming the drawbacks in traditional sizing process, such as high energy consumptions and sizing-agent cost, this research explored a new sizing approach by combing the foam-sizing and warp pre-wetting processes. Through the comparison tests on sizing quality, yarn morphology, and weaving efficiency between the traditional sizing process and this combined process, the study proved the combined process’ superiority. The sizing yarn qualities, such as the strength increase rate, the elongation decrease rate, the wear resistance increase rate and the hairiness decrease rate, are at the same level between the combined process and the traditional sizing process, and the weaving efficiency are not affected significantly with the new process; while the combined process is superior to the traditional process in the saving of gas, desizing waste water and desizing agent.

Analyses on fiber radial distributions of polyester/cotton blended yarn in complete condensing spinning

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  52-0. 

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In order to study the fiber radial distribution of blended yarn in complete condensing spinning, polyester/cotton blended yarn was spun in ring spinning, Lattice apron compact spinning and Complete condensing spinning systems respectively. The kinds of blended yarn sample are cut by chip cutter. By using MOTTC B1 microscope and Hamilton Migration Index method, the migration trend and radial distribution of fibers in the polyester/cotton blended yarns were studied. It is shown that the polyester is prioritized to transfer inside. Comparing with ring spinning, the migration index of fibers in the blended yarns spun by Lattice apron compact spinning systems is smaller. Comparing with Lattice apron compact spinning systems, radial distribution of fibers in the blended yarns spun by complete condensing spinning system is more random.

Research on test method for spandex fatigue of elastic warp knitted fabrics

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  57-0. 

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Abstract In this paper, testing method for spandex fatigue and runback of elastic warp knitted fabrics was studied. First influences and significances of initial elongation and reciprocating stretching on spandex fatigue and runback of elastic warp knitted fabrics were tested and analyzed. And then differences in spandex fatigue and runback of initial elongation and no initial elongation test were analyzed, combined with results of trying on shorts. The results show that fatigue is serious as the increase of initial elongation percentage and initial elongation percentage has significant influence on deformation rate and reversion rate and fatigue grade，that fatigue and runback are serious as the increase of reciprocating stretching percentage and reciprocating stretching percentage has significant influence on deformation rate and reversion rate and fatigue grade e and runback. Fatigue test results of no initial elongation conform to actual wearing, which initial elongation percentage is 60%，reciprocating stretching percentage is less than 80% the gauge length. The research results can provide a certain reference to fatigue and runback test for elastic warp knitted fabrics.

Fabric formability test and characterization methods based on three-dimensional scanning technology

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  63-0. 

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The paper summarizes the background and research status of the fabric formability and introduces the principle of structured light non-contact 3D scanning measuring instrument test. In order to quick, easy, accurate measuring and evaluating the mouldability of the glass fabric, put forward a kind of intuitive, objective and accurate evaluation method on the basis of using 3D scanning technology. Firstly, making sample fabric wrinkle under the action of the ball with the help of 3d scanning for digital model, and puting forward using the three-dimensional processing software model for processing related indicators.The volume under the fabric can characterize fabric formability better by analysing ten samples characterization and evaluation of fabric shape ability provides a new train of thought.This method provides a new thought for determination and evaluation of the fabric’s formability.

Study on waterproofness and moisture performance of densely woven fabric based on pore size distribution

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  69-0. 

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Synthesis and application of hyperbranched amino modified polysiloxane

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  73-0. 

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A hyperbranched amino modified polysiloxane was synthesized via ring-opening reaction of epoxy, by polydimethylsiloxane double-terminated with epoxy and diethylenetriamine as raw materials, and the modified polysiloxane emulsion was prepared. The effect of synthesis factors on the conversion rate of epoxy were researched, the condition of synthesis was optimized, the effect of molecular weight of polysiloxane on the properties of the emulsion of modified polysiloxane and its finished fabric were studied, and the properties of the emulsion of modified polysiloxane and its finished fabric were measured. The results showed that: as the relative molecular weight of polysiloxane was about 3100, the amount of substance ratio of polydimethylsiloxane double-terminated with epoxy to diethylenetriamine was 1.5:1, the temperature of reaction was 80 ℃, the time of reaction was 3 h, and the dosages of isopropyl alcohol as dissolvent was 30%wt, the epoxy conversion rate was 93.25%, the emulsion of synthetic products had excellent stable property and no floating oil, the average particle size of the emulsion was 56 nm. Compared with amino silicone and block polyether modified amino silicone, the fabric finished by the modified polysiloxane had lower yellowing, better softness and hydrophilic.

Antibacterial finishing of Modal fabric with chitosan/silver composite

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  80-0. 

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In order to increase the Modal fabric antibacterial property, a novel chitosan/Ag+ composite antibacterial is prepared by organic and inorganic compound method and applied to antibacterial finishing of Modal fabric . Using single factor experimental studies on the applicable concentration range of two antibacterial agents. The result of the Orthogonal experiment showes that the antibacterial rate of Modal fabric treated by the combination of 0.8g / L chitosan and 0.8mg/L in the PH 6.5 is more than 93%. Even after 50 laundering cycles the antibacterial rate has no significant decline. The damage of the strength and whiteness is small and the wrinkle resistance impoves instead.

Heterologous expression of Pleurotus djamor laccase gene in Pichia pastoris and decolorization on dyes by recombinant laccase

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  84-0. 

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Regarding the White Rot Fungus Pleurotus djamor as the templet,the complete sequence of Laccase Gf-lac1's gene can be got through the RT-PCR. In this way,the expression vector of Pichia pastoris named pPICZB-Gf-Lac1 is built and it is imported into Pichia pastoris by electrotransformation .What's more,part of masculine transformants called PCR turns out that the sequence CDS of Gf-Lac1 has been integrated in the Pichia pastoris chromosome.Besides,after training in the shake-flask liquid, the protein with higher pastoris engineering strains are selected. Furthermore, the vitality of laccase is reached 53U/L, and the study that laccase restructured is influenced dyeware bleaching has been researched further. The result turns out that the bleaching rate -restructring laccase to Alizarin Red Anthraquinone can be reached 53.6%; on the other hand, the bleaching rates of Heterocyclic Neutral Red, Methyl Orange Azo and Triphenylmethane Malachite Green are lower than Alizarin Red, which are namely 15.5%, 15.1% and 0.23%. In the words, it shows that the efficiency of restrucruring laccase to Alizarin Red possesses larger potential applications, thus it owns wider applied prospects in wastewater treatment.

Optimal degumming conditions of strains for microbial degumming of ramie

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  91-0. 

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The best degumming 8-1 strain was selected from the collected microbial degumming of ramie. We did 4 factors (culture temperature, culture time, volume ratio of bacterium fluid, rotate speed) 3 levels orthogonal test to study the best degumming conditions. The results show that culture time is the greatest influence, culture temperature and volume ratio of bacterium fluid is followed, rotate speed is the weakest influence. The best degumming conditions of 8-1 strain are 4d, temperature 39 ℃, volume ratio of bacterium fluid 1:40 and static placed. With these conditions, the average weight loss can reach 25.94％. Furthermore, we took the ramie fibers degummed by 8-1 strain to do the mechanics performance test and the surface observation. The results shows that when compared with chemical degumming, 8-1 strain increase the average value of single fiber strength of the degummed ramie by 43.45％ and the fiber’s surface is more smooth and less damaged.

Effect of Span40 on dyeing properties of Direct Yellow Brown ND3G onto cotton fabrics in nonionic reverse micelles

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  96-0. 

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In order to improve the dyeing capacity of anionic dyes onto cotton fabric in reverse micelles, the nonionic mixed reverse micelles were prepared by adding Span40 in TX-100 reverse micelles. And the system was used as dyeing media for coloration of direct yellow brown 3G onto cotton fabric. The effect of Span40 on the maximum water solubilization, water diameter, packing density, conductivity and dyeing properties of reverse micelles were investigated, respectively. The results indicated that the maximum values of the maximum water solubilization were observed when the ratio of Span40 was 50%. The water diameter and packing density of reverse micelles increased with increasing the ratio of Span40, which caused the lower conductivity. The repelling force and competitive adsorption between dyes and cotton fabric were decreased with increasing ratio of Span40, and the higher adsorption and dyeing properties in reverse micelles were obtained.

Numerical analysis of jet orifice geometrical effects on airflow characteristics in FDY yarn suction gun

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  103-0. 

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Using software CFX 12.1, this paper investigated airflow patterns in the yarn suction gun with different geometrical parameters of the jet orifice by numerical simulation, and discussed the relation between the flow patterns and yarn suction performance. The affecting mechanism of jet orifice geometry on the yarn suction performance was clarified and the rational parameters were obtained as follows: number of jet orifices N = 3, diameter of jet orifice d = 2.0 mm and angel of jet orifice ??= 75°. An increase in the number of jet orifices constricts free expansion of the injected air among jet streams and keeps them move forward more stably, which causes increases in air density and circumferential velocity component near the wall; however, it is accompanied an increase in the conflict between the jet streams when the number of jet orifices is over large, which decreases yarn suction force. An appropriate diameter of jet orifice promotes the yarn suction force by helping the development of a strong swirling flow and avoiding the occurrence of a normal shock wave. ?The angel of jet orifice plays an important role in generating a swirling flow by controlling the air circumferential velocity component. The yarn suction force has a close relationship to the distribution of air velocity, and depends strongly on the air circumferential velocity component. The normal shock wave should be avoided in the Laval tube when designing the yarn suction gun.

Influences of cylinder speed-change mechanism parameter for processing property on high-speed comber

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  110-0. 

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In order to resolve the contradiction of cylinder, nipper and detaching roller in movement coordinate on high speed comber, use elliptic gear transmission make cylinder turn changeably. Use MATLAB software calculates and simulates the angular displacement, angle velocity and angle acceleration of cylinder speed change movement. Then technological parameters such as the timing of combing with cylinder speed change, and the timing of the last row of needle on cylinder through detaching roller are analyzed. The results show: cylinder transmission mechanism by the style of elliptic gear can achieve short time of cylinder combing, increase time of preparing of detaching and lapping and time of lap raise end. Meanwhile the last row of needle on cylinder passes detaching roller earlier, cylinder catches away reversed combed web from detaching roller is effectively avoided.

Development of electronic shedding system of three-dimensional loom

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  115-0. 

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The shedding movement and the characteristics of the shedding mechanism of traditional loom are analyzed in this paper. According to the special requirements to shedding mechanism for weaving three-dimensional fabric, a new electronic shedding system is developed to form the clear multi-shed with multi-layer warp which is controlled by PLC and driven by servo motor. This method has simplified the shedding mechanism and improved the flexibility and reliability of the shedding mechanism. It is introduced that the general design of three-dimensional loom’s shedding system, including the driving system’s hardware configure and its software’s controlling principle. The new shedding system developed has been applied in a three-dimensional loom prototype successfully.

Design of multiplexed output switching power supply for high-speed flat knitting machine control system based on common DC bus

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  121-0. 

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Based on the higher speed and accuracy development of flat knitting machine control system ,we analyze the technical indexes which can satisfy the requirement of the power supply of the flat knitting machine control system，and design the scheme for high frequency switching power with the common DC bus and a multiplexed output. The design methods and parameters of a forward type circuit topology power with 24V input voltage and large output current are selective analyzed. Experiments have been carried out on a prototype, the results show that the four-way output voltage precision of the switching power is within 3%, output voltage is stable, ripple is small. It is accordance with requirements of the power supply of flat knitting machine control system and the knitting speed of knitting machine can reach 1.5m/s based on this power. It provides a cost-effective solution for the development of high-end flat knitting machine control system.

Design and development of alkali consistency online monitoring system for mercerizing machine based on measurement of alkali density

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  126-0. 

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Aiming at the need of online monitoring of alkali consistency and alkali recovery in domestic dyeing and printing industry, an intelligent differential pressure type alkali consistency meter with wireless communication function is developed according to the alkali’s density-consistency characteristics. With this meter, signal interference problems during long distance transmission in multi-point measurement mode can be effectively resolved, and the cost and complexity for developing a relevant control system can be reduced. Then an online alkali consistency monitoring system for mercerizing machine is developed by adopting the mentioned meter. With this system, a certain concentration alkali can be proportioned, mixed and transported to the target automatically, and alkali recovery and the requirement for reducing the consumption of concentrated alkali can be achieved. According to the experimental results, the measurement range of the system is between 0~770g/L while the consistency control accuracy is ±5g/L, and a half-year field operation of the system approves that the concentrated alkali for processing unit fabric can be reduced by more than 15%.

Tracking control and simulation of yarn tension based on right coprime factorization

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  132-0. 

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In the weaving process, yarn’s tension is changing, how to track and control it has become one of the most difficult problems. In order to reduce the tracking error, and simplify the tracking control problem of yarn tension, this paper puts forward a kind of control method of yarn tension based on right coprime factorization. The design of yarn tension model, based on the theory of right coprime factorization and three element model, will be obtained by mathematical calculation. The tracking control design will be designed and proposed with the yarn tension model and will be proved by the simulation in Matlab/simulink. Through the verification of theory and simulation system design of yarn tension, the tracking control method based on the right coprime factorization is able to track and control yarn tension.

Numerical simulations of air flow behaviour in spinning rotor

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  136-0. 

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Air flow in the spinning rotor is very complicated and the effect of rotor parameters on the flow behavior is not clear. Considering above status, simulations of air flow in the spinning rotor channel are done, and influences of rotor speed and geometric parameters on the air flow are analyzed. It is found from the results that flow structure in the spinning rotor changes significantly with the variations of rotor speed and geometric parameters. This is due to the balance of low pressure zone caused by rotation and another low pressure region in the export of fiber feeding tube. The axial symmetry of vortex structure in the rotor meridional plane is best while the angular velocity is 2000rad/s and slip angle is 22°. In this case, the pulsation and vibration caused by the air flow are smallest. The above research results provide with reference to the design of rotor spinning machines.

Numerical simulation and analysis of three dimensional flow field inside swirl nozzle based on STAR-CCM+

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  142-0. 

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Installation of swirl nozzle in ring spinning can reduce yarn hairiness. Using STAR-CCM+ software to numerically simulate the flow field inside the swirl nozzle, which can show the distribution of flow field of the nozzle yarn, and explain distribution of radial, tangential and axial velocity of the yarn path in nozzle. When the nozzle channel and the yarn path intersects in different directions and tangent points, combined with the effect of air flow on the fiber, we can realize the airflow distribution of yarn channel in swirl nozzle. Drawn from the simulation results: the tangency point of yarn path and airway of swirl nozzle along the negative X axis length is 14mm, and the direction intersects of the yarn path and the nozzle channel is upward. This swirl nozzle can reduce the majority of forward hairs.

Study on ply yarn model constructing by cubic C-Cardinal spline curve

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  148-0. 

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Research progress of fluid differential electrostatic spinning nozzle design

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  153-0. 

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With the development of nanotechnology,electrostatic spinning technology which can be used to obtain nanofibers has attracted more and more attention. Industrialization manufacturing is constrained because of the inefficient production of traditional capillary nozzle, while the new idea of differential nozzle structure which can form dense jets spontaneously solves the problems of low production of nanofibers. This paper reviews the basic principle and research progress of fluid differential Electrostatic spinning nozzle design, which provide reference for the further development of industrialization manufacturing of fluid differential electrostatic spinning nozzle and nanofibers industry.

Exploration of several issues about evaluation of fabric smoothness appearance after laundering

JOURNAL OF TEXTILE RESEARCH. 2014, 35(12):  159-0. 

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Change in fabrics appearance after repeated laundering depends on the material properties, mechanical force, detergents and many other factors which reduce the aesthetic value and wearability of a garment. Due to a variety of reasons, the individual results on traditional manual evaluation methods have big differences. In this paper, current research on methods for evaluating fabric smoothness appearance was reviewed. Besides, some important issues on technical aspects, evaluation index, classification methods and future study developments on wrinkling were deeply discussed. A precise and objective evaluation of fabric smoothness appearance can be helpful to assess textile material properties, clothing design, washing machine and detergents effect.