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Why do color printing packaging line indentation Fried

by:WenJie     2020-09-13

color printing printing & packaging manufacturer of color printing & packaging printing & packaging & packaging paste system often found that can appear indentation to fry line phenomenon, this not only affects the packing box of beautiful degree, also seriously affect the quality of it, why has this kind of phenomenon appear?

these reasons there are several kinds of condition, first let's take a look at it the material of paper fiber direction parallel to the indentation steel wire, paper fibers cannot make indentation area uniform stress at the same time, after molding, color box without fiber in the internal stress in the zone of indentation, the momentum of function, can appear the crack; Paper strength and toughness is poor, cut wear indentation after processing, on the part of color printing printing & packaging creasing the dominant or recessive a rift. After folding, back to the fold, glue, pressure and stability after processing. They form dominant crack;

when designing the box type ignores the thickness of the paper: related design without weighing box of the avoiding collision, forming lap a turning point in stress excessive concentration, after forming indentation to fry line phenomenon will occur. The above is the reason why color printing & packaging packing will blow line indentation.


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