What are the main characteristics of screen material for screen printing?
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Screens commonly used in screen printing are mesh, nylon mesh, polyester mesh, and stainless steel wire mesh. The main characteristics of various screens are as follows.
1 tensile strength [g (g) / D (diameter)] 绢 net is 3.7-4.1g (g) / D diameter), nylon mesh is 4.5-5.8g (g) / D (diameter The polyester mesh is 4.3-5.5 g (g) / D (diameter), and the stainless steel wire mesh is 1.5 g (g) / D (diameter).
2 dry-wet strength ratio (%) 绢 net is 92~100%, nylon mesh is 89~r90%, polyester mesh is 100%, stainless steel mesh is 100%.
3 nodular strength [g (g) / D (diameter)] 绢 为 2.9 g (g) / D (diameter), nylon mesh is 4.5-5.4 g (g) / D (diameter), The polyester mesh is 3.4-4.4 g (g) / D (diameter).
4 Tensile elongation (%) The mesh is 8-22%, the nylon mesh is 26-32%, the polyester mesh is 16"30%, and the stainless steel mesh is 38%.
5 dry-wetness ratio (%) 绢 net 120-134%, nylon mesh is 115"122%, polyester mesh is 100%, stainless steel mesh is 100%.
6 Stretch recovery rate (%, calculated at 3% stretch) The net is 80-aluminum material moment of inertia and the steel material has a moment of inertia of 15.088 cm. When the wooden frame cross-sectional shape is solid rectangle ( 5 × 4 cm), the moment of inertia is 41.667 cm of the fourth power.
7 density, expressed in grams per cubic centimeter. The density of the wood material was 0.9 g/cm 3 , the density of the steel material was 7.8 g/cm 3 , and the density of the aluminum material was 2.7 g/cm 3 .
8 thermal expansion coefficient (10' / ° C). The thermal expansion coefficient of aluminum material is 2.410'/°C, the thermal expansion coefficient of steel material is 1.2 10'/°C, and the thermal expansion coefficient of wood material is 3.0 10'/°C.