The glued parts of the paper bag machine are on the spine and the side. The hot melt adhesive used is also different. For example, the performance of the two is different. The hot melt temperature is different. The quality of the glue and the glue is suitable. Important, the high temperature of the melt glue will make the melt too thin and the viscosity is insufficient. The high temperature of the melt will make the glue too thick to penetrate and flow, and some will be attached to the ridge or side by small granular pieces. The cover will wrinkle and empty the ridge. It is worth mentioning that at present, the performance of hot melt adhesives produced by different manufacturers is not the same (we have such experience from actual use), taking the temperature of hot melt adhesive used by our factory as an example. Some side glue temperature is 120 °C, spine glue hot melt temperature is 135 °C, some side glue hot melt temperature is 180 °C, spine glue heat is 200 °C. Therefore, in use, according to the performance of the material, master the appropriate process parameters to ensure the quality of the glue. Under normal circumstances, after the glue is applied, the width of the side rubber cover is preferably 4mm to 5mm, and the spine glue can penetrate and fill the milling groove. When the glue is uneven, the glue is too thin, and the cover-covered paper bag machine is not replaced as required (or the height adjustment is properly adjusted), the bag after the plastic bag is prone to hollow ridges and wrinkles. This must be controlled and checked during the plastic bag process.

        The finishing work before the paper bag machine plastic bag is a process that can not be ignored in the whole process of wireless binding. If the paper bag machine enters the plastic bag if it is not finished properly in the finishing process, there will be many undesirable quality problems such as peeling off, loose pages, empty ridges, wrinkles and the like after the plastic bag. Finishing is to bundle the semi-finished products. In order to make the back of the compacted back stiff and firm, after the compaction and bundling, the polyethylene glue is brushed on the back of the bundled book. After the polyvinyl alcohol glue to be brushed is dried, the tie rope is loosened, and then each will be loosened. The carding is separated and transferred to the plastic bag.