The quality problem of hot melt glue binding

There are two main reasons for the quality problem of hot-melt glue-bound books: one is the quality of hot-melt glue (this is the basis of the quality of the book): the second is the hot-melt glue binding process The management of the quality of the back of the book (this is very important). The above two factors are interrelated.

You will find two major causes for the product quality dilemma of hot supports melt glue- bound catalogs: one is the standard of hot supports melt glue( here is the basis of the standard through the book): the second certainly is the hot- melt stuff binding process The management in the caliber of the trunk from your book( here is the incredibly important). The above two reasons are interrelated.

In the collection of hot melt adhesives, it is definitely necessary to select and employ hot melt adhesives of substantial quality and excellent cost efficiency. This is a powerful approach to ensure the quality from book binding, reduce the charge of using glue, and raise the overall economical benefit. Thelevel of quality problem of "the bottom from the textbook" appears. From the attitude from the performance substandard quality of hot- melt glues, the- melt glues have low ultimate tensile strength and hardness, and low melt viscosity. Together with the same thickness of the adhesive layer, hot melt glues of different qualities vary tremendously. For details, readers can direct to the article "Some Concerns on Hot Melt Glue Holding Process" in the Journal from Printing Quality and Standardization, Zero. 3, 2000.

From your perception of process operation, the full total hot- melt glue executed process book pages are generally not separated and pushed toned. Once pulled and pushed toned( seeing the edge of the paper and also the glue layer), that will greatly reduce the reserve page. Adhesion, in order the fact that loose pages and page gaps occur. The purpose of the milling groove within the back from the book is to boost the bonding area of the sizzling melt adhesive to the web pages of the book and enhance its tensile( folding) strength. As a result , the quality requirements in the milling groove must be met at the same time operation. Thedepth of the milling groove on the backside of the book( depending about the condition of the paper) should reach 1- one particular. 5 mm, and the beginning angle of the groove is definitely 60°∧- type groove( repairing is necessary when ever the angle is small). Scheduled to the inadequate design from the disc binding machine( straight line machine)( milling without cutting tool support) and manufacturing precision problem, the adjustment of the cutlery is difficult, and so the depth from the groove may only reach about 1. 2 mm, which in turn requires careful adjustment by the operator, Keeping the depth from the milling groove is the same, which is a significant connect to ensure the quality from perfect binding.

All in all , in buy to make the bound reserve tend not to loose pages and show up pages, in order that right now there is enough tensile( folding) durability between the book pages, you need to choose hot melt adhesives with high quality and performance . During the process operation, take find of the quality of the milling groove, take notice from the influence and change from the temperature in the hot burn adhesive on the melt viscosity, in order that the sizzling melt adhesive can achieve the proper penetration and bonding durability of the paper.

The two articles mentioned above have mentioned in detail the kind from issues of the perfect holding process. For readers who desire to comprehensively and deeply figure out the quality issues linked to the perfect binding process, please label "Some Issues Concerning the Sizzling- melt Binding Process" and Two articles on "Quality Supervision of Hot Melt Binding Technology". To be able to enhance the quality level of each of our country 's bound book as shortly as possible, I am ready to communicate with everyone and discuss together.