Vacuum forming machine vacuum forming common problems and solutions1

Printed on white paper or white cardboard, after heated to melt temperature, then the plastic blister) With the coating. Paper layer adhesion. Figure 1 is a packaging structure of amplifier schematic diagram; Tear in packaging, destroy the interface should be in the interior of the paper layer 5, only the plastic stick paper layer, the packaging in order to be successful, so the coated white board ( Card) Paper coating strength must be than paper layer high strength can meet the performance requirements for packaging. The cause of the effect not beautiful is often due to destruction of interface board (do not take place in Card) Internal paper layer. Specific conditions to specific analysis. ( 1) — When torn packaging, damage occur in the reservoir interface ( Show the stripping plastic without ink) That paper surface coating closed tightly, oil is difficult to infiltrate into paper layer. ( 2) When torn packaging, destroy the interface in ink layer ( Characterized by stripping the plastic zone of the ink, paper but stripping the hair less) That paper coating strength than paper layer strength is low, may be the dosage of latex paint is not enough, undercoat combined with surface coating is not good, cause uneven coating strength of adhesive migration. ( 3) When torn packaging, destroy the interface in white board ( Card) Paper coating surface, In figure 1 between 4 and 5) Low, suggesting that the paper surface coating strength and coating closed tightly, oil is difficult to penetrate the inside paper. ( 4) When torn packaging, destroy the interface in white board ( Card) Paper thickness of 1/2, 1/3, the effect is good. Based on the above analysis, the factors affecting the effects of aqueous oil basically has the following several aspects: paper, water, oil, printing process, technology, etc.