The analysis of the nylon silk screen printing
Silk screen printing generally use raw materials are made of synthetic polymer chemical fiber monofilament.Monofilament chemical fiber production is usually made from synthetic polymer viscous fluid, through with numerous micro hole spinneret penetrate filamentous fibers, it is a process of lax, within an increase later after stretch along the axis of macromolecular degree of orientation, then shape and winding be filament bundle.The synthetic monofilament of chemical fiber have anticorrosive, moth-proofing, high strength, heat resistant, flame retardant, water resistance, antistatic, wear-resisting, multiple deformation resistance and other properties.Now commonly used screen is nylon mesh, polyester silk mesh, wire mesh and through special processing characteristics of the wire mesh, etc.
Polyamide fibre is made up of oxalic acid and ethylene diamine shrink into salt, then through polycondensation, melt spinning fiber, according to the number of carbon atoms on the monomer molecules, the fiber is called polyamide 66, this kind of fiber in China said nylon 66, nylon 66 in the laudatory name.It is by the American chemist W.H. card rose in 1939 successfully developed, nylon fiber has good mechanical strength, high wear resistance, shows good tension characteristics, high elastic recovery features good extension (100% 100%), the size and the advantages of the multiple deformation resistance and mechanical properties.Due to the uniform size, smooth surface, so the ink by sex is also very good.Its defect is the stretchability of large nylon net.This kind of wire mesh in tension after a period of time, tension decreases, and the screen plate relaxation, precision.Therefore, not suitable for printing high dimension accuracy requirement of the circuit board, etc.? ?
Nylon net is made by chemical synthetic fiber, belongs to the department of polyamide.Nylon net has high strength, wear resistance, resistance to chemical medicine
Nylon mesh surface smooth ink good permeability, high strength and abrasion resistance, alkali resistance, finer than polyester silk net, easy to printing design of a fine line.But its large elongation, elastic modulus, low limit the network version of the stretch mesh tension, so the printing accuracy is not high, not suitable for high precision printing.Polyester yarn net made of polyester fiber woven, good stability, chemical resistance, resistance to mechanical force is better than that of nylon net, stretch mesh tension level is high, plane stability performance is also higher than nylon mesh, suitable for high precision screen printing.But compared with nylon net, combination of template and fastness is not high.Wire mesh wire diameter is small, can textile mesh screen ? and high strength and high modulus of elasticity, the plane stability is good.But large rigid metal screen, are prone to depression, and when we should not be poor resilience and recovery, not suitable for printing smoothness bad substrates.Plating nickel wire mesh is in polyester yarn plating layer, mu online thickness of nickel composite silk screen, the advantages of both polyester silk mesh and wire mesh, high tension, low elongation of wire mesh can be printing plate.In addition to electrostatic screen is in meridian polyester silk net, polyester silk and silk and white carbon black silk ribbon weaving, improve the conductivity of silk screen, eliminate electrostatic interactions affect image edge sharpness.