Polyester mesh for screen printing frame is one of the important materials for making polyester mesh printing plates. The proper selection of polyester mesh frame has a direct impact on the quality of plate making and the quality of printing. In order to ensure plate making, printing quality and other requirements, the polyester mesh frame can be selected according to the following conditions.
① The mesh frame must have a certain strength. Because when the polyester mesh is stretched, the polyester mesh produces a certain tension and pressure on the polyester mesh frame. This requires the polyester mesh for screen printing frame to withstand pressure and no deformation. It is necessary to keep the size of the mesh frame accurate.
② Under the condition of ensuring the strength, the mesh frame should be as light as possible to facilitate operation and use.
③ The bonding surface of the mesh and the mesh frame must have a certain degree of roughness to strengthen the adhesion between.
④ The solidity of the mesh frame. The mesh frame must be in contact with water and solvents, and affected by temperature changes. This requires that the mesh frame does not skew, which can reduce waste and reduce costs.
⑤ It is necessary to configure mesh frames of different specifications in production, and determine the appropriate mesh frame according to the printing size when using, which can reduce waste and facilitate operation.
The materials used for making the frame are mainly wood, hollow aluminum profiles, cast aluminum molding frames, steel and other materials. The most commonly used are aluminum frames. However, all kinds of mesh frames have their own characteristics. When selecting, according to different situations, mesh frames of different materials can be selected, which are described in turn below.
The wooden mesh frame has the characteristics of simple production, light weight, convenient operation, low price and simple method of stretching the mesh. This mesh frame is suitable for hand printing. However, the mesh frame of this wooden material is poor in solvent resistance and water resistance, and is easy to deform after being flooded, which will affect printing accuracy. This kind of polyester mesh for screen printing frame was used in the past, but it is rarely used now.
Hollow aluminum profile frame and cast aluminum molding frame have the characteristics of light operation, high strength, solid and difficult to deform, strong solvent resistance and water resistance, beautiful appearance and so on. Suitable for mechanical printing and manual printing.
The steel mesh frame has the characteristics of firmness, high strength, and good resistance to solvents and water, but it is a bit bulky and inconvenient to operate, so it has a small range of use.
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