Papers by Keyword: Dyeing Property

Abstract: Wool was treated by air low temperature plasma and dyed with Lanasol CE series reactive dyes. Dyeing properties of the treated wool were studied and compared to the untreated wool. The result showed that the dyeing properties of the low temperature plasma-treated wool were improved obviously, and the dyeing temperature can be reduced. From the measurements of SEM, alkali solubility and water retention rate, it can be seen that the scale layer surface of the treated wool was damaged, and the specific surface and the wettability of the treated fiber was increased. It was these changes that lead to improving dyeing properties of the treated wool.

Abstract: Wheat protein composite fiber is a kind of new regenerated cellulose fiber containing protein utilization of wheat bran prepared. The fundamental characteristics of wheat protein composite fiber were studied. The results show that the dry fracture strength is 2.03 cN/dtex and it is lower than that of viscose fiber. It has high moisture regain and low fracture strength and the moisture regain of the fiber is 12.23%. The whiteness of wheat protein composite fiber is lower than viscose fiber. The combustion performance of wheat protein composite fiber is similar to viscose fiber. Compared with wool, the combustion performance is easy. Dyeing properties of the fiber with reactive dyes is excellent and the goods have bright color and good color fastness. The dyeing percentage of direct dyes reached to 90%. The wheat protein composite fiber product is deeply liked by people with its good wearing property, and extensively applied to wear base material with its fine affinity.

Abstract: PAN fiber is one that contains at least 85% by mass of acrylonitrile co-monomer in the polymer chain. It has low moisture-absorbency and electrostatic tendency. Using collagen modified PAN fiber can overcome the shortcomings. Collagen modified PAN fiber is a kind of surface modification fiber which was hydrolyzed by NaOH aqueous solution first, and then grafted with collagen. The performance of collagen modified PAN fiber was studied. The results show that: compared with PAN fiber, the surface of collagen modified PAN fiber is smooth and covered by collagen composition, the moisture regain increased from 2% to 6.1%,the breaking strength and elongation of collagen modified PAN fiber are decreased, the breaking strength is 2.31 cN/dtex, the breaking elongation is 22.8%, dyeing properties of collagen modified PAN fiber with cationic dyes and acid dyes are excellent and the goods have bright color and good color fastness.

Abstract: Chitosan quaternary ammonium salt (short for HTCC) was a strong cationic water-soluble polymer. The bombyx Mori silk fabric was treated by HTCC solution and the salt-free reactive dyeing process and properties of modified silk fabric were investigated in this paper. The results showed that salt-free dyeing effect of silk fabric treated with Cibacron Blue FN-G was better when HTCC concentration was 8g/L, the processing temperature was 60°C and the processing time was 35min; the optimum salt-free reactive dyeing process of silk fabric treated by HTCC was: dyeing pH was 8.0, dyeing temperature was 90°C and dyeing time was 70 min; HTCC had obviously promoted dyeing effect, after salt-free dyeing, the dyeing rate, the color fixing rate and the dyeing depth of silk fabric modified by HTCC solution were all increased obviously, and the washing fastness and rubbing fastness were both improved slightly; the smaller molecular weight of chitosan was used to modify to HTCC, the higher dyeing rate and color fixing rate of the treated silk fabric were obtained.

Abstract: This paper has studied the structure and property of high tenacity polyamide 6 upon different draw ratios and heat styling temperature process conditions, characterized with wide-angle X-ray diffraction (WAXD), sound velocity method, Fourier transform infrared (FTIR) spectroscopy, amino-terminated content determination and essential property texts such as the absorption of moisture and dyeing. It was demonstrated that increasing the draw ratio (DR) and heat styling temperature were conducive to crystal-to-crystal transformation and stabilizing the internal structure of fibers. The temperature played a significant role in orientation of high tenacity polyamide 6, particularly subjected to a higher heat styling temperature, owing to its thermo plasticity. And increasing the draw ratio and heat styling temperature were both conducive to the tensile property, but little beneficial impact on moisture property. The high tenacity polyamide 6 exert a good effect on absorption of moisture and acid dye, and for dyeing the effects of hydrogen-bond as well as the van der Waals’ force play a significant role in dye pickup, especially in the high tenacity polyamide 6 upon different draw ratios.

Abstract: Using ultrafine carbon black (CB) dispersions to dye cotton fabrics back is feasible through an exhaustion procedure. The effects of CB particle size, the type of dispersants, electrolyte concentration and cationic modification of cotton on the colour yields of CB dyed cotton fabrics have been investigated. CB particle size ranging from 130nm to 200nm is appropriate to achieve a deep black shade in cotton fabrics. Cationic dispersant improves the K/S values and wash fastness of the CB dyed cotton fabrics. However, caution should be exercised in adding electrolytes to CB dispersions. Cationic modification of cotton is an effective method to achieve higher K/S values of CB dyed fabrics. It is desirable to dye cotton fabrics with ultrafine CB particles instead of with sulfur dyes and reactive dyes.

Abstract: The natural vegetable dye grape seed extract (GSE) was applied on the direct dyeing of lyocell knitted fabric. By changing the dyeing condition, the modified process was derived after evaluating various fastnesses of the dyed fabric. The direct dyeing method should be under the condition of GSE’s concentration 5g/L, bath preparation temperature 80°C, pH value 3, bath ratio 1:30, dyeing time 60min. The color is very sensitive to pH and GSE’s concentration. The rubbing fastness, washing fastness and light fastness is good, the acid perspiration fastness is better than the alkaline perspiration fastness.

Abstract: The cellulose of raw bamboo fabric was first prepared by selective oxidation with NaIO4. Then the oxidized raw bamboo fabric was modified by sericin protein solution. The dyeing characteristic was studied. Also, the dyeing effect such as K/S value, color fastness, leveling properties were evaluated and compared with unmodified raw bamboo fabric. The results showed that the dyeing properties of oxidized raw bamboo fabric modified by sericin protein were improved. Furthermore, the whiteness of the modified raw bamboo fabric was decreased and the water absorption property was improved.

Abstract: Purple sweet potatoes were applied to extract anthocyanins for dyeing silk fabrics. Dyeing and anti-ultraviolet properties of anthocyanins were investigated. The color yield, exhaustion behaviors, fastness properties and anti-ultraviolet properties of dyed silk fabrics were also discussed. The results showed that high color strength value (K/S value = 3.01) was achieved at 50 °C and pH 3. The washing and rubbing fastness properties were enhanced by mordant dyeing method using alum. The dyed silk samples displayed good anti-ultraviolet and the UV transmittance was decreased by 46% at 300nm and 58% at 360nm.

Abstract: t is pre-mordant dyeing. Dyeing property of Carmine, gardenia yellow and sodium copper chlorophyll on cotton fabrics which were pre-treated by metal mordant (FeSO₄AlCl₃ and ZnCl₂ ) was studied. The reasonable pre-treatment was determined by comparing the color depth (K/S value) of dyed samples. And then, the dyed samples were treated with no-iron finishing resin 931-33 to fix the color. The result shows that the color depth of cotton fabric is greatly improved after determined pre-treatment, and the washing fastness is improved after color fixing.