Company Info
Jiangyin Tianyu Nickel Screen Co., LtdAdd:No.121 Yongan Road, Changshou, Jiangyin City, Jiangsu Province, P.R.China
Tel: 86-510-86360099
Fax: 86-510-86966716
Email:barry@tynickelscreen.com
www.tynickelscreen.com
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Printing the Fabric--Brief Introduciton---TIANYU Rotary Screen Printing Solutions
Edit time: 2009-11-02
Printing the Fabric There are a number of printing techniques used in the industry. These will be discussed in detail, along with several unique processes, in the next section.
Drying the Printed Fabric
After printing the fabric, the paste is dried to prevent accidental smearing of the print design and color migration. At this point, depending on the printing plant layout, the printed fabric may immediately go through the fixation process, or it may be held to go to fixation later. The type of colorant and production issues with the printing operation dictates the choice.
Fixation of the Printed Dye or Pigment
The next step is fixation of the print color. For dyes, fixation normally incorporates an atmospheric steamer with specified moisture content and a nominal temperature of 212°F (100°C). With certain dyes, an auxiliary chemical may be necessary as an extra additive to the print paste. For example, for complete fixation, reactive dyes require additional alkali. In the case of vat dyes, reducing agents are necessary. For pigments on all fibers and disperse dyes for polyester or nylon, only high temperatures are necessary. The fixation equipment used can be a dry heat oven or super-heated steam. The key issue is reaching temperatures of approximately 350°F (177°C) to cure a synthetic pigment binder and as high as 400°F (205°C) for disperse dyes.
Afterwashing
In the case of dye prints, the printed fabric is thoroughly washed then dried after fixation. This step is necessary to remove the thickener, alkali, and other ingredients of the print paste left on the fabric surface after fixation. If not removed, these materials could interfere with subsequent finishing processes. Pigments are often printed on finished fabrics so the afterwashing is not necessary.
