Screen printing first originated in China, has a history of more than two thousand years.As early as in China's ancient qin and han dynasties appeared the clip jie printing method.By the time of the eastern han dynasty the method of jijie batik had been popular and the level of printed products had been improved.To the sui dynasty daye, people began to use a silk screen frame for printing, so that the jie printing process for screen printing.According to historical records, the fine clothes w
Ordinary polyester mesh: woven from ordinary polyester fibers.Advantages: A.High tensile strength, able to withstand high tension B.Good wear resistance, can withstand printing ink pigments and squeegee on the screen wear.C.High light resistance, in natural room temperature light.Long storage period D.Not sensitive to climatic factors, small moisture absorption, strong heat resistance E.Low elongation, good dimensional stability F.Chemical resistance is strong, can withstand
Printing plate development is difficult. Causes: (1) too long exposure time. (2) after scraping, stored for a long time. (3) excessive drying temperature causes thermal crosslinking. (4) the photosensitive adhesive has been exposed. (5) when the bottom plate and film contact is not solid. (6) failure of photosensitive adhesive. (7) diffraction of light during exposure. Solution
A.Selection of mesh frame material General selection of LY12, LF2 and other hard alloy aluminum square pipe profile, size selection of 20mm wide, 20mm thick, four angles with argon arc welding or riveting processing.The metal frame has high precision and stable dimension. 2.Screen material selection Currently the most used nylon mesh and polyester mesh.Nylon wire mesh heat resistance is poor, heat is easy to produce thermoplastic deformation, so that the te
Screen printing plate making, printing process, screen performance has the following basic requirements: 1.High tensile resistance.Tensile strength refers to the wire mesh by tension, resistance to damage (fracture).In addition, the screen moisture after the strength of the change should be small. 2.Small elongation at break.Elongation refers to the wire mesh in a certain tension when the elongation and the ratio of the original length, expressed as a percentage.The el
Stretch mesh It is best to use pneumatic stretch and mesh machine, the quality requirements of stretch and mesh are as follows: 1. The tension of tension net is suitable and uniform (1) the use of pneumatic tension network when the tension requirements must be left to stand for 3-6 hours before the tension network adhesive; (2) the stretched net should be placed for at least 24 hours, especially for large cargo or machine printing, to ensure equal stress at all points