A apparatus (100) for printing on yarns (14) is described, comprising a feeding station (1) comprising a beam (10) in which a plurality of yarns (14) are wound, a printing station (2) comprising a plurality of print rollers (22) able to print dyes onto yarns (14) unwound from said beam (10), a drying station (3, 4) able to perform drying and fixing of the printed dye on said yarns (14) leaving the printing station (2) and a beaming station (6) able to collect said printed and dried yams leaving the drying station (3, 4) on a warp beam (61).

Also described are a yarn printing method and a fabric obtained with said printed yarns.

An apparatus and method are described for treating one or more yarn strands before or after the strand is dyed. The apparatus preferably includes a modified space dyeing apparatus having a dye applicator modified to be used as a treatment composition applicator for treating a yarn strand. The apparatus enables a high speed yarn dyeing and treatment method. Also described is a method and composition for treating yarn with a polyphenolic derivative composition to form a bleach-resistant yarn.

This invention provides a method for attaining a partial dyed yarn having a partial dyeing applied to a side surface of fibrous raw material of which dyeing and processing were difficult in the prior art dyeing process and further provides a device for attaining the partial dyed yarn, wherein its gist consists in manufacturing a partial dyed yarn having a thread-like side surface capable of generating a mixed taste of deep color tone in the product or a feeling of high class taste in the case that this yarn is applied to a fabric or a knitted product.

In the prior art dyeing method in which various kinds of fibrous raw materials such as thread-like natural fibers, animal fibers, synthetic fibers or semi-synthetic fibers or the like (hereinafter called as "fibrous raw materials"), it was generally carried out such that the dyed yarn was dyed and processed in such a way that its dyed state may become uniform at its cross-sectional shape with the dyed yarn being cut in a ring form and in the case of dye printed yarn or the like, the product having a part of the raw material fiber such as raw cotton or the like dyed in advance was mixed with it to express as the dye printed yarn. However, in such a prior art method, it was essentially required to perform a spinning step, it took much time for processing the product and it could not satisfy the high-speed needs in modern industry so as to attain a new and unique color tone. The present invention improves the aforesaid problems in the prior art dyeing and processing method and provides a partial dyed yarn, its dye liquid adhering method and a dye liquid adhering, drying and taking-up device capable of accomplishing a deeper taste or a higher class taste in mixed feeling or the like than that of the prior art dye printing yarn, wherein a continuous fibrous raw material (A) is passed through the dye liquid adhering roll (3), thereby the dye liquid is partially or continuously adhered to the thread-like side surface of the fibrous raw material (A), thereafter it is applied only with a heat treatment to cause the yarn to be dyed in a desired color tone in a speedy manner. The aforesaid fibrous raw material (A) is passed over a guiding groove (5) formed at an outer circumference of the dye liquid adhering roll (3) at a desired yarn speed while a tension force is being applied to it, the dye liquid adhering roll (3) is properly rotated with its frictional force and at the same time, its amount of adhesion is controlled and the yarn is passed in a hot air drying device (2) while it is turned therein so as to dry the adhered dye liquid and then the yarn is taken up as a dried cone (11), it is processed with heat treatment and than a partial dyed yarn at the side surface of the yarn can be attained.

Dyeing traveling textile yarns with a dye in foamed condition, and, more particularly, dyeing by separating a traveling sheet of yarn into separate spaced sheets and applying foamed dye to the inner facing and outer facing surfaces of the yarns in the separate sheets. Then recombining the separate sheets into a single sheet and further applying foamed dye to the yarn in the recombined sheet.

An apparatus and method are described for treating one or more yarn strands before or after the strand is dyed. The apparatus preferably includes a modified space dyeing apparatus having a dye applicator modified to be used as a treatment composition applicator for treating a yarn strand. The apparatus enables a high speed yarn dyeing and treatment method. Also described is a method and composition for treating yarn with a polyphenolic derivative composition to form a bleach-resistant yarn.