It can be seen from the foregoing that the scraper is an important tool for coating photosensitive adhesive, and the quality of the scraper directly affects the quality of the screen printing plate. It should be noted that there are the following aspects: First, the edge of the blade that the scraper is in contact with the wire mesh must ensure a high degree of flatness, and there must be no signs of bruising. If the flatness is low or there are scratches, the coated film will have streaks or uneven film thickness, which will cause burrs and uneven thickness of the printed graphic lines. Secondly, the edge of the cutting edge is required to be smooth. If this point is ignored, it will result in slashing the wire mesh during coating. The third is that because the stretched wire mesh has a certain degree of elasticity, the phenomenon of uneven film thickness is easy to occur during squeegee coating, that is, the film in the middle is thick and the four-sided film is thin. In order to avoid such problems, the side that contacts the wire mesh is usually slightly curved when making the squeegee, which can avoid the uneven film thickness caused by the elasticity of the wire mesh. The fourth is to use stainless steel materials that are not rusty, corrosion-resistant, and light in weight when making scrapers.
Compostable Forks,Plastic Cutlery Fork,Biodegradable Disposable Forks,Compostable Cutlery Forks
Anhui Jianfeng Environmental Protection Technology Co., Ltd , https://www.jfplacutlery.com