Common 10 big printing process, a common clothes, want to be different. Printing process is the key. Originally, ordinary fabrics, after various printing processes, have a completely different feeling in style and style. It's amazing! Let's take a look at the top 10 common printing processes!
1. Roller printing
The process of printing on fabric with copper drum (flower tube for short) with concave pattern, stained with color paste, is called drum printing. When the roller printing is imprinted on the fabric, the color paste is transferred to the fabric to obtain the pattern.
2. Digital printing
Digital printing, printing with digital technology. Various digital patterns processed by scanning, digital phase plane, image or computer are input into the calculation, and then processed by the computer color separation printing system, there is a special rip The software sprays all kinds of printing special dyes (reactive, dispersive, selected ink coating) directly to all kinds of fabrics or other media. After processing, it can obtain all kinds of high-precision printing products on all kinds of textile fabrics.
Digital printing process can be divided into the following categories
1、 Classification by printing method
Digital printing is a general term for ink-jet printing technology. In order to explain the printing methods and characteristics more clearly, this paper introduces the digital printing of textile fabrics in all aspects, various types and process decomposition.
1. Digital direct printing
Digital direct jet printing is applicable to disperse, acid dye, coating and active ink. Digital direct jet printing is a process of direct jet printing directly on the semi-finished textile fabric which has been starched. The process is: select the corresponding ink according to the textile, design the pattern and sizing, and then go to the textile direct jet printing machine for direct jet printing, then dry, steam and wash , drying, soft setting and other processes (in which the paint can be fixed after baking)
2. Heat transfer
Heat transfer printing is to print textile dyes on paper (coated), and then transfer the patterns on paper to textile by heat transfer printing machine. The advantage is high precision, but low printing efficiency. Only polyester or polyester containing textiles can be made. Among them, transfer fabrics are processed by semi-finished products without adding softener (adding softener may affect the coloring rate).
3. Cold transfer
As with heat transfer printing, it is necessary to print textile dyes on paper first, and then stamp paper and fabric with special machinery to realize pattern transfer.
There are two ways to deal with the embossed fabric:
First, traditional steaming, washing, shaping and other traditional processes are carried out;
The second is to carry out the cold reactor chemical reaction treatment to fix the color (the fabric needs to be chemically treated in advance). Using reactive, disperse, acid and other dye inks, this process is applicable to all fabrics except blending.
2、 Classification by dye and process
1. Distributed digital printing
At present, more than 50% of printing ink in our country is disperse dye ink, which is used for polyester fiber and other chemical fiber fabric printing. Disperse dye is a kind of non-ionic dye with low water solubility, which mainly exists in highly dispersed state in water with the help of dispersant.
2. Active digital printing
Reactive dye ink accounts for about 29%, mainly used for silk and cotton fabric printing; reactive dye, also known as reactive dye. It is a kind of dyestuff that reacts with fiber in dyeing. In this kind of dye separation, there are genes that can react with fibers chemically. When dyeing, the dyes react with fibers, forming a covalent bond between them, forming a whole, improving the fastness to washing and rubbing. The active fuel molecule consists of two main components: the parent dye and the active group. The group that can react with the fiber is called the active group. At present, it is mainly used in woven and knitted fabrics such as cotton, hemp and silk, or fabrics with higher components.
3. Acid digital printing
The proportion of acid dye ink is small, about 7%, which is used for printing wool, nylon and other fabrics. Acid dye is a kind of water-soluble dye with acid group in structure, which is dyed in acid medium. Most acid dyes contain sodium sulfonate, which is soluble in water and has bright color and complete chromatogram. It is mainly used for dyeing wool, silk and nylon, as well as leather, paper and ink. It has no colouring power to cellulose fiber.
4. Pigment ink digital printing
The use of pigment ink in China is relatively small, less than 2%, most of which are foreign products. The manufacturers include Huntsman, BASF, DuPont, Klein and other companies.
3、 Classification by fabric composition
1. Digital printing based on cotton, but reactive dye ink can also be used for hemp, silk, etc;
2. Digital printing based on chemical fiber, digital printing produced by disperse heat sublimation dye ink and chemical fiber disperse direct spraying;
3. Some mixed fabrics such as t / C, which can not be operated by reactive, disperse and acid dye ink alone, are printed with paint ink;
4. For digital printing mainly made of nylon and wool, acid dye ink is used for production, and silk can also be used.
3. Rotary screen printing
The cylindrical nickel skin screen with hollow pattern is installed on the top of the rubber guide belt in a certain order. The color paste is input into the screen and stays at the bottom of the screen. When the round screen rotates with the guide belt, the scraper tightly pressed on the bottom of the screen and the mesh are relatively scraped. The color paste reaches the fabric surface through the pattern on the screen.
4. Flat screen printing
The printing die is a polyester or nylon screen (pattern plate) fixed on a square frame with a hollow pattern. The pattern on the flower plate can pass through the color paste, and the non pattern part is closed with the polymer film. print