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A factory that makes color boxes, in order to make the sealing glue line and the box of the same color, hides the seams and makes them transparentHot melt adhesive granulesAdd color masterbatch and adjust to deep red. After going online, the glue line became blurred, blocked the gun, and there were also some areas that did not stick, and the entire batch of gift boxes was almost scrapped.
The technician found three errors during the review: firstly, poor compatibility between colorants and rubber particles, uneven dispersion, and uneven depth of rubber lines; Secondly, the colorants contain fillers, which increase the melt viscosity and cause blockages when the spray gun pressure is insufficient; The third reason is that excessive addition weakens the cohesion of the adhesive itself, resulting in a decrease in bonding strength.
| Add your own colorants | Supplier pre coloring |
|---|---|
| Uneven dispersion and flowering | Uniform and Same Color |
| Easy to block gun | Controllable viscosity |
| Strength decline | Minimum adhesion guarantee |
Q: Can I try a small amount of color adjustment myself?
Answer: Developing samples is possible, but compatibility and gun blockage tests must be conducted, so do not directly put them on the production line.
Q: Is pre colored glue much more expensive?
Answer: The quantity is similar to self-adjusting, and it also saves on rollover losses, making it more cost-effective overall.
Color mixing: You can play with small samples by adding your own color masterbatch, and hand it over to the supplier for pre coloring during mass production. The glue line is invisible and does not overturn.
Xiao Wu’s fast printing shop received a graduation commemorative book, 300 copies, and found that nearly 10% of the pages were scattered before submitting. The customer was pressing hard, so he dealt with it overnight. This is his summary of the scattered pages of first aid and root cause improvement stories. First aid: delivered on […]
Background: The warehouse is stacked on the sixth floor, and the bottom box mouth opens its own mouth A small household appliance factory’s finished product boxes weigh 18 kilograms per box and are stacked in six layers in the warehouse. Use the original oneHot melt adhesive granulesAfter sealing and passing the factory inspection, the bottom […]
First of all, let’s talk about the results: a tourism printing factory in East China produces foldable map brochures, with 55 gram ultra-thin floor drawings on the inner pages. Originally, using ordinary rubber particles often resulted in glue penetration and cracking at the folds. After switching to Sunlife hot melt adhesive thin paper special low-temperature […]
Are friends who work in printing, binding, and brochure production always troubled by these problems: opening the glue when flipping pages on copperplate paper books, yellowing of the glue layer and low texture, and equipment for drawing and sticking glue during high-speed production? In fact, 90% of the problems lie in the selection of hot […]
