How to choose high viscosity hot melt adhesive particles for book binding? Memorize the list of 6 parameters at once

Directly give the list: select books and magazines with high adhesive particles for binding, and look at these 6 items

The selection of adhesive for book and magazine binding is not about “the stickier the better”, but about finding a balance between the penetration of the book back, the tactile sensation of flipping pages, and the inability to drop pages. Check each of the following 6 parameters before placing an order to avoid 80% returns.

How to view each item individually

• softening pointFlat books and journals should be selected at 85-95 ℃, which is sufficient; If the book needs to be stored in a high-temperature warehouse or transported in a tropical area, it can be of a high temperature resistant model above 100 ℃.
• Melt viscosityThe adhesive book core needs to be glued into the paper fibers to prevent the pages from falling off. If the viscosity is too high, it will not penetrate, and if it is too low, the back of the book will overflow with adhesive. 2000-4000 mPa · s is a common sweet area.
• Opening hoursThe linkage line speed is fast, and if the opening time is too short and the cover is not pressed yet, it will dry and cause fake page sticking.
• Color and odorLight color and low odor are particularly important for picture books and children’s books, and also reduce complaints about workshop odors.
• ash contentThe residue of inorganic fillers increases gun blockage and carbonization, and long-term use increases cleaning frequency.

A fast self checking method

After receiving the sample, make a sample book first: let it dry for 24 hours and then perform a “page drop test” – randomly pull a few pages, and if they break instead of come off, it indicates that the bonding is sufficient; Check if the back of the book cracks after flipping it 50 times. Both items have passed, and then a small batch trial production will be conducted.

FAQ

Q: Is it guaranteed that the page won’t drop just because it’s labeled as “high viscosity”?
Answer: Not necessarily. If high viscosity is accompanied by high viscosity, it will not seep into the paper, and the surface will stick and the inside will be loose. Consider the viscosity and opening time comprehensively.

Q: Do I need to change the adhesive when using copperplate paper for the inner pages and film for the outer cover of the same book?
Answer: For laminated covers, it is necessary to use models that have adhesion to the film. Ordinary book and magazine adhesives may not be able to firmly adhere to the film surface. Please specify the material when placing an order.

Q: How to choose a worry free option for frequent glue changes in a small printing factory?
Answer: Choose a universal book EVA series to cover most orders. Guangzhou Sunlife TradingSunlifehot melt adhesiveThe book binding series is divided into models based on copperplate paper, adhesive paper, and laminated covers. Suppliers are not changed when changing orders, and the parameter table is provided with the goods for easy reconciliation.

Remember: When selecting adhesive for book and magazine packaging, look for six factors: softening point, viscosity, opening time, color, odor, and ash content. Don’t just focus on the word “high viscosity”.