Several key factors about select screen printing mesh (1)
In the different application of materials and equipment screen printing, the selection of mesh size and screen type is not easy.screen printing mesh selection is a process that requires understanding and consideration of the screen's many characteristics that affect printing results.This article discusses these features and provides some hints for a full understanding of the screen situation and how many variables affect the printing effect.
The screen composition screen printing technology benefited from its use of materials in continuous improvement.The earliest silk screens were made of natural, polyfibrous materials, such as silk and cotton.In the future, synthetic multi-fiber materials were developed, and single-fiber nylon, polyester and stainless steel materials were developed.
The latest screen material includes some very interesting mixtures for special printing, which require special strength and dimensional stability.The different tensile strength of these materials determines the strength and dimensional stability of the woven wire mesh.
The improvement of wire mesh structure and wire mesh weaving and finishing provides favorable conditions for printing in today's environment.However, there are still many variables to consider when selecting a screen.
The structure/strength of the mesh, two types of mesh are commonly used in modern screen printing: multi-fibre mesh and single-fibre mesh printing materials and equipment mesh are also more refined.The intermediate grade of silk is very important in the electronics industry.
The multi-fiber screen structure is mainly used for thick screen, which has the lowest dimensional stability and the worst printing capability.This screen can be made into a durable, sturdy screen for filtering.The multi-fiber screen has excellent adhesion to emulsion and capillary film.It was successfully used with direct/indirect film before the emergence of more stable materials.But this structure makes cleaning and recycling difficult.
There are a variety of filament diameters.Generally speaking, the thicker the diameter of the wire, the stronger the strength of the woven wire mesh.The structural differences are shown here.In some applications, large meshes and high meshes are combined and require twill weave to achieve satisfactory results. Twill weave is sometimes the best alternative because it is firm and strong.These screens are not suitable for four-colour printing because the substrate contacts and mesh interferes more, however, they are suitable for heavy industrial applications and textiles because of their durability.
The finest polyester mesh is used for the highest mesh number.The finer the mesh means the larger the mesh, the more fine the mesh.There is a lot of research and development invested in making the superfine mesh stronger and more stable.The more fine mesh ink layer is thinner.In order to obtain a thinner ink layer, one side of the polyester mesh can be calendered with heat.This process makes the mesh thinner and has a very smooth surface, which makes it suitable for coating transparent coating, as it reduces the consumption of transparent coating and reduces the cost.