Application of the hottest plain weave screen in f

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The application of plain weave sieve in lithography

the fabric weave of sieve generally includes full hank weave, half hank weave, square weave and plain weave

the mesh of full hank yarn and half hank yarn will not move, and the texture is firm, but the yarn is thick, the color paste is not easy to pass, and it is easy to produce plugs. Therefore, sales, production, and technical quality are four in one to provide customers with professional technical support and value-added services. It is generally not used in printing. The advantages of huwen texture are that the effective opening area is too large, the holes are smooth, the color paste is easy to pass, and the pattern outline is clear, so it is widely used in lithography. The disadvantage of this fabric is that its strength is lower than that of other fabrics. The structure of the square weave is similar to that of the plain weave, except that the longitude and latitude of the plain weave are single filaments, while the longitude and latitude of the square weave are double filaments, so the strength of the weave is higher than that of the plain weave, but the effective opening rate is low

screen type is the expression of screen printing plate by screen number and wire diameter. In other words, the size and strength of the sieve are the main indicators to measure whether it is suitable for printing and apricot. If the silk diameter is thick and the sieve has strength, it will be durable. A reasonable eye size enables the printing screen to provide a reasonable amount of slurry and place it on the surface of the fabric. The selection of a reasonable mesh number also provides a basis for a reasonable eye size

the appellation of sieve mesh number in practical application is not unified. For example, some technical data say that the sieve mesh is 800 mesh, L35 () mesh, etc., while the sieve mesh number in the sieve product specification is only 25 ~ 495 mesh. The reason for these differences in appellation is not only the difference between metric system and English system, but also the unit area of sieve mesh

It is related to the number of holes per unit length. The number of wire holes per unit length is actually the warp density of the screen, which can explain the density between the wires of the screen. In practical application, it is difficult to know which type of screen is used and which mesh is used. But no matter which name is adopted, the higher the mesh number, the tighter the silk, the smaller the hole, and the worse the permeability of the printing paste; On the contrary, the lower the mesh number, the thinner the silk and the larger the hole, the better the permeability of the printing paste

the thickness of the wire diameter is directly due to the failure of the buffer, which affects the strength of the printing screen and the size of the hole. With the same mesh number, when the wire diameter increases, the strength of the screen increases, but some companies have attached great importance to the independent research and development ability since its establishment. The effective screen filtration area has decreased, and the slurry feeding volume has decreased

when the wire diameter is the same, the selection of mesh size can be carried out according to the following principles. 7.2.1 factory inspection items include dimensional deviation, appearance quality, color, compressive strength and flexural strength:

① fine pattern, smooth outline requirements, fine mesh (higher mesh size) screen should be selected; On the contrary, the ground color and block surface pattern should choose a coarse mesh (low mesh) screen

② printing paste has large rheology, so fine mesh sieve should be selected; On the contrary, it is better to choose a coarse mesh sieve

③ fine mesh sieve should be used for thin and hydrophobic fabrics; For fabrics with rough surface and good water absorption, a coarse mesh sieve should be selected

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