Mathematical relationship between the colour shade depth and the fibre count for disperse dyeing of polyester fibres

The colour shade depth of dyed microfibres is lighter than that of dyed conventional fibres even if there is no difference between the absorbed dye quantities ( M _t) within the fibre. This difference is due to the different light reflectance on the fibre surface for microfibre and conventional fibre, which have a different specific surface area. In this study, the simple mathematical relationship between the colour shade depth, the fibre counts (0.22, 0.56 and 1.46 dtex) and the adsorbed dye quantity is developed for disperse dyeing. The experimental dyeing results and the obtained dyeing results from the simple mathematical relationship were compared for different fibre counts.     

Aftertreatment of polyester fabric dyed with temporarily solubilised disperse dyes

Temporarily solubilised disperse dyes derived from aminophenyl-4-(β-sulphatoethylsulphone) are exhausted on the polyester fibre mostly in the vinylsulphone form and to a lesser extent as their hydroxyethylsulphone analogues. After dyeing, to remove the unexhausted dyes on the polyester fibre, sulphite anions were added to the dyebath. The vinylsulphone residue of the dye was attacked by the sulphite anion via an addition reaction converting the dye into a soluble derivative, which then had little affinity for the polyester fibre. The effect of sodium sulphite on the conversion of the dye was investigated using HPLC. The wash and rub fastness properties of the dyed fabric aftertreated with sodium sulphite were similar to those obtained with reduction clearing.     

The surface polymerising of fluoromonomer and the shade-darkening effect on dyed polyester microfibre fabric

The surface polymerising of fluoromonomer on dyed polyester microfibre fabric is investigated. The shade-darkening effect of perfluoropolyester acrylate polymer is discussed by colour yield, reflectance spectrum and the colour differences. The surface polymerising of fluoromonomer on dyed polyester microfibre fabric had an excellent shade-darkening effect. After surface polymerising, the dyed fabrics had no significant effect on washing and wet rubbing fastness.     

Cationic organofluorosilicone as deepening agent in the application of dyed polyester fabric

Polyester fabrics are usually difficult in dyeing deeply due to their dense structure and high surface refractive index, and deepening finishing is an effective method to obtain dark polyester fabrics. In this article, octamethyl cyclotetrasiloxane (D₄), 1,3,5-tris(3,3,3-trifluoropropyl)-methylcyclotrisiloxane (D₃F), and silane coupling agent KH-902 were used as main monomers to synthesize organic fluorosilicone, and further to prepare cationic organofluorosilicone (COFS) and COFS darkening agent. FTIR and ¹H-NMR were used to characterize the structure of synthetic products. The finishing experiments confirmed that COFS darkening agent had good shade darkening on dyed polyester fabrics with small color change. The optimum conditions of deepening finishing were COFS darkening agent concentration of 20%, the pick-up of 85%, and the curing temperature of 180 °C. After finishing, the dyed fabric had no lowering effect on color fastness, all at grade 4 or above. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 48208.     

Effects of plasma treatment and metal-ion chelation on lightfastness of dyed polyester/cotton fabric

Polyester/cotton blend fabric was dyed with Chemistron dye—a mixture of reactive/disperse dyes. Dyed fabrics were subjected to radiofrequency (RF) plasma treatment of different duration and were subsequently treated with metal salts. The effect of surface modification by plasma and dye–metal complex on colorfastness to light is discussed. Evaluation of the improvement in lightfastness was made using the CIE system of color measurement with a standard illuminant D65 and 10° standard observer. The color parameters and color deviations were obtained by Data flash–100 color measurement spectrophotometer with chroma QC 3.0 color quality control software. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 292–299, 2001     

Shade darkening effect of polyorganosiloxane modified with amino and hydroxy groups on dyed polyester microfiber fabric

The novel polyorganosiloxane material S‐101 modified with amino and hydroxy groups is synthesized. Shade darkening effect of modified polyorganosiloxane on dyed polyester microfiber fabric is investigated by reflectance spectrum, color yield (K/S), and the color differences (ΔE). The colorimetric data of CIELAB is discussed. The results show that the novel material of silicone polymer modified with amino and hydroxy groups has excellent shade darkening effect on dyed polyester microfiber fabric. The rates of the color yield increase (I%) of all dyed fabric with four dyes (Disperse Yellow S‐4RL, Red GS, Blue 2BLN, and Black SF‐R) exceed 10%. The shapes of the reflectance spectra curves of the dyed fabrics before and after treated with S‐101 are not noticeable change. The dyed fabrics with the polymer have not significant effect on the wash fastness and wet rubbing fastness. The low reflectance thin film on dyed fabrics is formed. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

Self-assembly of the polysiloxane modified with cationic and perfluorocarbon groups on the polyester surface and its effect on the color shade of the dyed polyester

The polysiloxane modified with cationic and perfluorocarbon groups could form film on the polyester surface by macromolecular self-assembly process. The thin film on the polyester surface could affect the color shade of dyed materials. The effect of the polysiloxane film on the color shade of the dyed polyester was investigated by reflectance spectra, color yield (K/S) and the color differences (ΔE). The colorimetric data of CIELAB was discussed. The results show that the thin film of the polysiloxane modified with cationic and perfluorocarbon groups on the polyester surface had good water repellency. The effect of the polysiloxane film on the color shade of dyed polyester was noticeable. The K/S of the dyed polyester fabrics with the modified polysiloxane film obviously increased. The reflectance spectra of the dyed fabrics treated without and with the modified polysiloxane had not significant change.     

我国水刺非织造布专用涤纶短纤市场前景分析

综述了近年来我国水刺非织造行业的发展情况、水刺非织造布的主要应用领域以及对涤纶短纤的性能要求 和水刺专用涤纶短纤的特点。指出随着我国水刺非织造布产能及需求的快速增长,给水刺专用涤纶短纤带来了良好的市 场前景。     

Synthesis of fluorine‐containing acrylate copolymer and application as resins on dyed polyester microfiber fabric

The two resins of fluorine‐containing acrylate are synthesized by atom transfer radical polymerization. The raw materials used are hexafluorobutyl mathacrylate and dodecafluoroheptyl methacrylate. The FTIR, ¹HNMR, and ¹⁹FNMR are used to characterize copolymer structures. The application as resins on dyed polyester microfiber fabric is investigated. Shade darkening effect of the resins is discussed by color yield (K/S), rates of the color yield increase (I%), and the color differences (ΔE). The polymers containing perfluorine groups have excellent shade darkening effect on dyed polyester microfiber fabric. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

FDY聚酯超细纤维结构和性能研究

通过测定FDY聚酯超细纤维的密度、取向因子、沸水收缩率、条干不匀率等力学性能 ,研究FDY聚酯超细纤维聚集态结构和性能的内在联系 ,为改进和提高FDY超细纤维的超仿真纤维特性提供了理论依据     

Prediction of recipes for cotton cationisation and reactive dyeing to shade match conventionally dyed cotton

Cationisation allows cotton to be dyed with anionic dyestuffs (including anionic pigment dispersions) without the need for salt, and with decreased usage of dye, water, and energy. Appropriate cationisation levels play a part in dyeing properties such as fabric levelness, in fastness properties such as lightfastness, and in the overall cost of the cationisation treatment. The objective of this work is to assess whether it is possible simultaneously to predict a dye recipe and cationisation treatment level for cotton to yield a colourless or nearly colourless dyebath at the completion of the dyeing to match the shade of conventional fibre reactive dyeing of cotton. It has been shown that it is possible to model a cold pad batch cationisation process, relate the colour yield data and cationisation level for individual dyes, and finally predict a dyeing recipe and the required corresponding cationisation treatment to match the shade of conventional fibre reactive dyeing of cotton. The predicted dye recipe and cationisation amount yield colourless or nearly colourless dyebaths at the conclusion of the dyeing process.     

Studies on silk fabric dyed with a hemicyanine dye

Silk fabric was dyed with a hemicyanine dye, DHEASPBr‐C₄, to create the fluorescent silk fabric in this article. The study initially focuses on the dyeing properties of the dyed silk fabric, followed by the reflectance and emission spectra. The results show that the sorption isotherms are the Langmuir type and the dyed silk fabrics using DHEASPBr‐C₄ have an obvious fluorescent effect in the spectral range 570–720 nm, while their peak locations of ca. 590 nm in the emission spectra are under the excitation of 365 nm. Finally, the CIE coordinates of the dyed silk fabric are discussed in order to investigate further potential applications.     

Relationship between direct dye characteristics and coverage of immature fibre neps in dyed cotton fabric

Cotton fabric containing a large number of neps was dyed with each of 17 azo direct dyes. Visible coverage of neps composed of immature fibres varied widely among the dyes. An evaluation of those structural characteristics of the dyes that might account for their differential ability to achieve coverage of neps was undertaken. Direct dyes containing more than one amino or amido group in their structure were found most likely to achieve relatively good nep coverage. Scanning electron micrographs revealed considerable variation in the types of fibres making up the individual neps in a single piece of cotton fabric. Differences in direct dye behaviour towards nep coverage were most evident with those neps composed of immature fibres with some secondary wall development.     

涤纶织物上化学镀银的晶体结构与性能

利用化学镀,在涤纶织物上制备了金属银薄膜.化学镀银液配方及工艺条件为:硝酸银3.0g/L,氢氧化钠2.0g/L,葡萄糖2.0 g/L,氨水适量,温度25℃,pH=11.采用扫描电镜和X射线衍射研究了薄膜的表面形貌和晶体结构,采用紫外分光光度计和静电伏特计分析了镀银涤纶的抗紫外及抗静电特性.结果表明,化学镀银后涤纶织物的抗紫外和抗静电性能有了很大提高.     

Effect of plasma treatment on surface structure and properties of polyester fabric

Poly(ethylene terephthalate) fabric was treated by plasma initiated in various gases: nitrogen, oxygen, air, carbon dioxide and ammonia. Plasma-treated fabric showed a considerable change in surface structure and wettability. It was observed that the change in the surface structure of the polyester fibres was closely dependent on the gas type and treatment conditions. The wetting time of plasma treated fabric considerably drops in comparison to untreated fabric and the best results were obtained by treatment in nitrogen, oxygen and air plasma. A good correlation exists between change in the surface structure of the fabric and its wettability. Infra-red a.t.r. spectroscopy showed some differences in the spectra of plasma treated fabrics but these changes are only moderately dependent on the gas type and plasma conditions. Modification of the surface structure of the polyester fibres depends on the current frequency within the studied range of 0.05–100 kHz.     

Poly(methyl methacrylate)/polysiloxane core‐shell latex as a deepening agent for dyed polyester fabric

Polyester fabrics are usually difficult to dye deeply due to their high refractive indexes. In this study, poly(methyl methacrylate)/polysiloxane core‐shell latex was used as a deepening agent in the colour‐deepening finishing of dyed polyester fabrics by lowering the refraction index and enhancing the diffuse reflection via the rough surface. Poly(methyl methacrylate)/polysiloxane core‐shell latex has a better shade‐deepening effect than polysiloxane latex on dyed polyester fabrics. The mass ratio of core/shell monomer and the finishing conditions of the polyester fabrics had a large influence on shade deepening. The optimum finishing conditions were obtained for a mass ratio of core/shell monomer of 1:2, a deepening agent concentration of 10 wt%, a pick‐up of 80%, and a curing temperature of 180°C. After a deepening finishing, the dyed polyester fabrics showed a small colour difference and the colour fastness barely decreased.     

TCS法生产涤纶细旦FDY工艺探讨

探讨了TCS法生产 5 6dtex 48f涤纶细旦FDY工艺技术。当切片中w(H2 O)≤ 2 5× 10 - 6,纺丝温度为 2 98℃ ,组件压力为 2 0MPa、丝束中油的质量分数为 0 8% ,风温为 ( 2 3± 1)℃ ,风速为 0 3m s,热管温度 176℃、纺丝速度为 45 0 0m min时 ,可获得优质涤纶细旦FDY。     

Effect of corona discharge treatment on indigo dyed cotton fabric

The present study proposes new conditions for achieving the aged-look effect of denim. Indigo dyed cotton fabrics were treated by corona discharge at different power levels and number of passages. Colorimetric parameters of corona treatment were assessed by the CIE L*a*b* colorimetric system and the pH and colour fastness of samples were tested. The surfaces of dyed samples were studied by scanning electron microscopy and Fourier Transform–infrared/attenuated total reflectance (FTIR/ATR) analysis. Under the same conditions of corona treatment, the faded-look effect was reduced as the depth of dyeing was increased. Increasing the power and the number of passages increases L* and b * and decreases a * values. This indicates that samples become lighter and yellower but soaping can reduce yellowness. FTIR/ATR results show that indigo dye oxidises, and isatin and anthranilic acid are produced. The pH levels of corona-treated samples reduce as the power and number of passages increase. This acidification is in agreement with the results of FTIR/ATR analysis.     

原液着色黑色聚酯中炭黑的分散与控制

在三釜流程聚酯装置上,采用原液着色方式生产黑色聚酯,对炭黑分散剂及其浆料的稳定性,以及炭黑浆料的注入方式等进行了探讨。结果表明:以自制的TA202为分散剂制得质量分数为20%的炭黑/乙二醇浆料,采用预缩聚前注射的方式,调整熔体过滤与混合条件,能制得炭黑分散性良好易于纺丝的黑色聚酯熔体。