What are the key elements of bookbinding adhesive?

Adhesive temperature control is an important factor in determining the quality of the connection

Temperature is the key to the performance of hot melt adhesive. During the use of hot melt adhesive, the temperature of the glue should be controlled according to the temperature of the workshop production environment and the condition of the product paper. During use, the temperature of the adhesive should be kept as constant as possible and should not be too high or too low. At present, the temperature of the adhesive in the production process of general printing factories is mainly controlled between 140 ℃ and 170 ℃, and the fluidity and permeability of the adhesive solution are directly affected by its use. temperature When the temperature is high, the fluidity and permeability of the adhesive solution are good, but the adhesive strength decreases and the adhesion of the adhesive layer to the plate material weakens. When the temperature drops, the opening time of the adhesive solution is shortened, which can easily cause insufficient paper penetration.

However, this directly affects the amount of glue and the thickness of the book glue. Long term high temperature can cause carbonization and decomposition of adhesives, leading to aging and affecting the quality of connections. When the temperature of the glue is too low, the viscosity of the glue increases, the fluidity decreases, and the permeability weakens, directly affecting the affinity between the glue and the paper, which can easily cause backing glue. This book is sticky, so it is incomplete and easy to lose and drop pages. The working temperature should be slightly adjusted according to the temperature range provided by the manufacturer, and should not be too high or too low. This is the use of bookbinding adhesive in binding books and publications.

ControlCoatingThe amount of glue is an important factor in forming book backs

For high-quality hot melt adhesive, it has high bonding strength and can achieve good bonding effect with less glue. The control of adhesive quantity is related to the thickness of the book back adhesive and the adhesive in the book slot, which directly affects the bonding effect. During the production process, it is necessary to add glue appropriately to reduce the impact on the temperature of the glue, or directly through a pre tube pot. In addition, the amount of glue in the glue box of the hot glue machine should not be too small, otherwise it is easy for the glue output to be unstable. If the adhesive layer on the back of the book is uneven, it may be caused by unstable adhesive volume.

Bookbinding glueThe key elements in bookbinding applications may not be limited to these! In practical applications, one should continuously accumulate experience in pasting. Only by facing problems can we understand the key points, make accurate judgments, and come up with excellent solutions.