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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.
A factory that exports precision instruments used BOPP tape to fix honeycomb cardboard liners. However, due to rough shipping, the liners shifted and instrument edges were damaged, resulting in a high return rate. Later, it was changed toHot melt adhesive particles are glued and fixedLet’s break down this set of tactics and talk about it. […]
As a result, a graphic printing store in Guangzhou received an urgent order from the exhibition organizer to deliver 3000 200g copperplate paper picture books within 48 hours. With the cooperation of Sunlife hot melt adhesive copperplate paper special adhesive particles and technical support, two adhesive machines were connected and operated for 36 hours to […]
As a result, a graphic printing store in Guangzhou received an urgent order from the exhibition organizer to deliver 3000 200g copperplate paper picture books within 48 hours. With the cooperation of Sunlife hot melt adhesive copperplate paper special adhesive particles and technical support, two adhesive machines were connected and operated for 36 hours to […]
Case background: Compliance threshold for food packaging A color box packaging factory in South China has received an order for snack gift boxes, and the customer has requested that the sealing adhesive must provide a food contact compliance certificate. The original supplier was unable to provide testing, and the order was almost lost. The landing […]
