There are several methods of printing on the surface of molded pulp packaging, because the paper supporting surface is relatively rough, and its printability is comparable to the usual paper carrier materials, such as rubber printing, copper paper, and cardboard paper.
1. Pulp molding surface screen printing packaging products
In the screen printing mode, the concentrator is placed on the screen version, and then the screen version is connected to the screen version to form a certain angle, and pressure is applied to make the ink pass through the screen printing version. The substrate is on the container
2. Inkjet printing packaging products on the surface of pulp molding
Pulp molded packaging products have large variations in their structure, and the inkjet printing method can also be done in the surface of the surface. Inkjet printing is a non-contact free imaging printing method that uses meters to store information without having to store video information on the board, and the print head does not touch the container, which can be changed under operating conditions. In a wide range of conditions, clear text and patterns are reliably printed on the corresponding uneven surface of the pulp molded package.
The principle of pulp molding inkjet printing is to eject tiny ink dots from one or more print heads into the surface of each paper molded product on the production line through slits to form text and patterns in a dot matrix. The injection of ink is done by pressure or static electricity, and can be discharged from bottom to top or from any angle, especially suitable for surface printing of structural shapes.
3. Surface transfer method of pulp molded packaging products
According to the printability of the material and the structural characteristics of the pulp molding, the printing technology can be carried out in a pipeline to perform the printing technology. Transfer is an indirect printing method, which is used by silicone rubber on a hemispherical surface, uses copper or steel intaglio layout, and uses graphic ink on the layout, and then transfers to the substrate to complete the printing. It can complete multi-color delicate printing on irregular uneven surfaces.
