Do we still need to use hot melt adhesive particles for thread locking? What stage cannot be skipped

Thread-sewn perfect bindingStill need to use hot melt adhesive particlesThe only difference is the dosage and location compared to wireless adhesive packaging. The sewing thread connects the book stickers one by one, solving the root problem of loose pages in the text; But the smoothness of the book back, the fit between the spine and the cover, and the stiffness of the finished product still rely on hot melt adhesive. Simply put, lock thread is responsible for “preventing pages from falling off”, while hot melt adhesive is responsible for “shaping the book”. The two are not interchangeable.

Where exactly is the hot melt adhesive stuck in the lock thread glue package

On the actual production line, hot melt adhesive particles are mainly used in three positions:

• Book back adhesiveAfter locking the thread, the book back should be uniformly glued, and a stack of book stickers should be “solidified” into a whole book core. After milling the back and pulling the groove, the glue should penetrate better.
• Side glueApply thin adhesive to the areas on both sides of the book block that come into contact with the inner cover to ensure that the cover does not curl during flipping.
• Blocking cloth/ring lining fixationThe commonly used adhesive point fixing plug cloth and ring lining in hardcover locksmith books require high initial adhesion and aging resistance of the adhesive.

What are the differences in adhesive requirements between lockwire and wireless adhesive installation

Suggestions for selecting adhesive

When making lock thread adhesive, priority should be given to selectingMedium to low temperature, good fluidity, and strong permeabilityEVA hot melt adhesive particles to avoid high viscosity clogging of grooves; If the hardcover book ring lining and stopper cloth are fixed, use a model with higher initial adhesion. Guangzhou Sunlife Trading (Sunlife Hot Melt Adhesive) has a mature ratio of back adhesive and side adhesive for book and magazine binding. When customers change the thread, they can adjust the melt adhesive temperature (usually 150-170 ℃) according to the thickness of the book and the machine speed to ensure stable shipment.

Frequently Asked Questions

Q1: Can we use lockwire instead of glue and completely avoid using hot melt adhesive?
No. Lockthread only solves the connection of the inner text. Without glue applied to the book back, the finished product will become loose and the spine will have no stiffness, making it impossible to form a book.

Q2: Is it a glue problem with the missing pages of the lock book?
Most likely not. When a page falls off in a lockstitch book, first check the distance between the lockstitch needles and whether the book cover is loose. Adhesive only affects the smoothness of the book back and the fit of the cover.

Q3: Can lockwire and wireless share the same adhesive particle?
Universal book and magazine adhesive particles can be shared, but it is recommended to use a separate high initial adhesion model for the fine binding lock thread, as the sealing ring liner is more stable.