What type of hot melt adhesive is used for binding desk calendars and wall calendars? Efficiency Transformation Case of a Cultural and Creative Factory

Background: The bottleneck of binding due to seasonal rush work

A factory that produces cultural and creative calendars focuses on rushing goods in the fourth quarter of each year. Originally, the main line was dried with cold glue,Hot melt adhesive granulesAfter being put into operation, the speed should have been increased, but the yield rate in the first month was only 82%. There were occurrences of page flipping and glue opening at the iron ring, which crushed the production capacity due to rework.

problem localization

• Calendar paper is thick (above 250g) and mostly coated, with poor adhesive absorption;
• The original universal EVA pellets had insufficient initial adhesion to thick coated paper;
• The milling back is shallow, the amount of glue applied is small, and the glue does not eat the paper fiber.

Transformation action

Technicians from Guangzhou Sunlife Trading went to the factory to make samples, using high initial adhesion and high penetration EVA granules specifically for books and magazines. They also adjusted the parameters of the adhesive assembly line to: deepen the milling back by 0.5mm, increase the adhesive amount to 0.6 g/book, and press and hold for 3 seconds. Sunlife hot melt adhesive provides trial adhesive reports for different paper weights simultaneously, helping the production line directly compare and select.

Result

The rush season not only delivers on schedule, but also frees up production to accept additional orders.

Frequently Asked Questions

Q1: Do iron circle calendars also need to use hot melt adhesive?
The iron ring is responsible for the loose leaf, while the spine of the book is still secured to the inner pages and cover with hot melt adhesive.

Q2: Is it necessary to use adhesive for thick paper?
The combination of glue type, milling back, and glue amount is insufficient for single glue replacement.