A reactive dye compound and preparation method and application thereof. The reactive dye compound is a compound of the following formula (I) or an alkali metal salt thereof, in formula (I), D.sup.1 and D.sup.2 are each independently the group of the following formula (a) or (b). The reactive dye compound is capable of applying in printing and dyeing of cellulosic fibers, polyamide fibers or their fabrics. The reactive dye compound of the present invention has a novel structure, good washing fastness and rubbing fastness, and good fiber-bonding stability, and are suitable for dyeing and printing of fibers such as cotton, rayon, silk, viscose, and wool.

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A reactive dye compound and preparation method and application thereof. The reactive dye compound is a compound of the following formula (I) or an alkali metal salt thereof, in formula (I), D.sup.1 and D.sup.2 are each independently the group of the following formula (a) or (b). The reactive dye compound is capable of applying in printing and dyeing of cellulosic fibers, polyamide fibers or their fabrics. The reactive dye compound of the present invention has a novel structure, good washing fastness and rubbing fastness, and good fiber-bonding stability, and are suitable for dyeing and printing of fibers such as cotton, rayon, silk, viscose, and wool.

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The invention discloses a special-purpose reactive disperse dye for waterless dyeing of natural fibers in supercritical CO.sub.2 fluid and an intermediate thereof. The reactive disperse dye has a longer alkane-chain bridging group between a chromophoric parent structure and an active group of the dye, which effectively promotes the donating-withdrawing effect on the electron cloud in the conjugated system, enhances the hyperchromic effect, effectively reduce the influence of the active group itself and its reaction on the dye coloring system, improves the color and stability against acid and alkali of the dye, and facilitate the improvement of the compatibility of the dye with supercritical fluid and the dyeing performance for natural fibers as well. The invention also discloses an intermediate of the reactive disperse dye, and a method for preparing the reactive disperse dye.

The present invention relates to a waterless fiber dyeing method using a mixed fluid medium, in which supercritical carbon dioxide fluid medium is mixed with steam to form a mixed fluid medium, so that the waterless fiber dyeing effect to natural fibers is improved. The method of the invention can effectively modify the hydrophobic supercritical carbon dioxide fluid medium and improve the polarity thereof, thereby increasing the solubility of polar dye under the dyeing condition and simultaneously expanding the fiber. Thus, the present invention significantly improves the dyeability and dyeing behavior of the hydrophilic fibers in supercritical carbon dioxide fluids. The invention has the advantages of simple process, convenient operation and low energy consumption, and avoids consuming a large amount of water resources and discharging pollutants in the traditional process, and has the characteristics of environmentally friendly and high efficiency.

A finishing method for reactive dye inkjet printing based on a cationic modifier includes: using the inkjet printing method to spray print the cationic modifier ink and the reactive dye ink on the cellulose fiber fabrics' pattern area after being subjected to sizing treatment, then subjecting the fabrics to steaming or baking treatment, and subjecting the fabrics to soaping to get the reactive dye inkjet printing fabrics. The timespan of spray printing the cationic modifier ink and reactive dye ink is 0-2 min. Cationic modifier ink includes 1.0-60.0 wt % cationic modifier. The cationic modifier refers to the molecular whose structure contains reactive group and positive charge group and the number average molecular weight of 100-30000. The reactive group is one or more in the group containing epoxy group, triazine, pyridine, and olefin. The positive charge group is one or more in the group containing quaternary ammonium salt, and ammonium chloride.

A finishing method for reactive dye inkjet printing based on a cationic modifier includes: using the inkjet printing method to spray print the cationic modifier ink and the reactive dye ink on the cellulose fiber fabrics' pattern area after being subjected to sizing treatment, then subjecting the fabrics to steaming or baking treatment, and subjecting the fabrics to soaping to get the reactive dye inkjet printing fabrics. The timespan of spray printing the cationic modifier ink and reactive dye ink is 0-2 min. Cationic modifier ink includes 1.0-60.0 wt % cationic modifier. The cationic modifier refers to the molecular whose structure contains reactive group and positive charge group and the number average molecular weight of 100-30000. The reactive group is one or more in the group containing epoxy group, triazine, pyridine, and olefin. The positive charge group is one or more in the group containing quaternary ammonium salt, and ammonium chloride.

A copolymer composition is disclosed with advantages for textile fibers, yarns, blended yarns, fabrics, and garments. The composition includes polyester copolymer, between about 9.5 and 10.5 percent adipic acid based on the amount of copolymer, between about 630 and 770 parts per million (ppm) of pentaerythritol based on the amount of copolymer, and between about 3.4 and 4.2 percent polyethylene glycol based on the amount of copolymer.

A method for producing durable fluffy and soft loop fabric having embedded weft floats, including: 1) yarn selection; 2) winding; 3) warping; 4) sizing; 5) weaving; and 6) dyeing and finishing. During the weaving process, low-twist or zero-twist yarns or filament long floats are embedded into loops. During the dyeing and finishing process, due to weft-wise shrinkage, the embedded weft floats shrink and expand, thereby supporting the loops upright without lodging. In addition, the fluffy zero-twist yarns and interlaced yarn floats form a stacked stereoscopic structure with other weft yarns fixedly connected to the loops, thereby facilitating the extension of the loops and enlarging moisture diffusion surfaces of the loops during baking and air-drying processes to create a rapid drying condition for towels. Therefore, a loop fabric which has a special style and a fluffy and soft hand feeling and is still fluffy and soft after being washed is obtained.

A method for producing durable fluffy and soft loop fabric having embedded weft floats, including: 1) yarn selection; 2) winding; 3) warping; 4) sizing; 5) weaving; and 6) dyeing and finishing. During the weaving process, low-twist or zero-twist yarns or filament long floats are embedded into loops. During the dyeing and finishing process, due to weft-wise shrinkage, the embedded weft floats shrink and expand, thereby supporting the loops upright without lodging. In addition, the fluffy zero-twist yarns and interlaced yarn floats form a stacked stereoscopic structure with other weft yarns fixedly connected to the loops, thereby facilitating the extension of the loops and enlarging moisture diffusion surfaces of the loops during baking and air-drying processes to create a rapid drying condition for towels. Therefore, a loop fabric which has a special style and a fluffy and soft hand feeling and is still fluffy and soft after being washed is obtained.

Methods and kits are provided for tie-dyeing various materials. A garment or other object is soaked using water or a different liquid, excess water is removed, the object is gathered and tied, and at least one dye is applied to the object. The dyed object is then placed in a heat-resistant container and heated in a heat source such as a microwave. This allows the dye to set more rapidly than via conventional means.