Introduction of printing technology of non-woven bag
At the beginning of non-woven bag replacing plastic shopping bag, non-woven bag basically using screen printing process, also known as "screen printing".
However, with the continuous improvement of customers' requirements on the degree of exquisite printing and environmental protection of products, many new non-woven printing methods have emerged. Here are some of the current mainstream in the market:
Screen printing and watermark.
Due to the use of water elastic glue and no chemical composition of the ink as the printing medium, in textile printing is more common, also known as printing.
Mix color paste with water - based elastic glue when printing.
Printing plate without chemical solvent, can be directly washed with water.
It is characterized by good coloring, strong covering and fastness, washable, and basically odorless.
Shortcomings are also obvious, multi-color pattern high cost, long production cycle, pattern color is not allowed.
The finished products processed in this way are usually called multi-film non-woven bags.
This process is divided into two steps, that is, the traditional gravure printing process will be printed on the film text and text, and then the use of laminating process will have a pattern of film composite on non-woven fabric.
Generally large area color pattern printing non-woven bags are using this process.
It is characterized by fine printing.
The disadvantage is that there is a conflict with the concept of environmental protection, because the membrane is difficult to degrade.
Three, heat transfer printing brush.
This method is more troublesome, that is, the first text and text printing to heat transfer film or heat transfer paper, and then through the transfer of heat transfer equipment to transfer patterns to non-woven fabrics.
The medium commonly used in textile printing is heat transfer film.
Its advantage is: the printing is exquisite, has the rich gradation edition, can compare to the photograph.
Therefore, we see that non-woven bags with beautiful patterns are more expensive because of the high cost of this method.
Four, non-woven flexo printing or non-woven offset printing.
The method is by means of rubber plate (blanket) will be printed on the plate text and text transfer to the substrate of the printing method, it is also the rubber plate, the existence of blanket, this printing method named.
This printing method combines the advantages of the above three methods and overcomes the disadvantages of the above three methods.
Both heat transfer printing, laminating printing effect, and can perfect overcome the shortcomings of laminating printing is not environmentally friendly and heat transfer printing of the expensive shortcomings, is the manual screen printing can not match the perfect performance.