EVA Hot Melts For Air Filter

To understand and master the various models and technical performance of EVA hot melts. Different types of hot melt adhesives have different opening, solidification, and cooling time. It is also necessary to distinguish the appropriate period of use of summer rubber and winter glue due to different regions. When the temperature is different, the opening and curing time will also change.

Use EVA hot melts to avoid direct fire directly heated, must be heated with a spacer oil bath or with a sealed electric heating plate heating device.

The solid EVA hot melts must be preheated to the standard before use, and then released to the glued working plastic box. The preheating time is generally 2 hours. During the glue process, the solid rubber block should not be directly mixed into the rubberized work box to prevent the gel temperature from being uneven, the fluidity is not good, or the gel which is not completely melted is applied on the back of the book. It causes uneven coating or difficult bonding and affects the appearance quality of the book.

The amount of glue in the pre-molding pot should be properly controlled, not too much. Excessive use can not be used, the colloids melted, causing deterioration and aging, viscosity reduction, affecting adhesion; can not be added too little and not enough, causing waiting for melting to affect normal production.

During the opening time of the hot melt adhesive, complete the bonding process. In case of downtime, the book holder is to be glued or removed immediately in the book core above the rubberizing wheel to prevent the occurrence of defective products.

In the long-term repair stage of the wireless perfect binding machine, the pre-molding pot and the working plastic box should be closed to stop the colloidal wheel melting and not deteriorate.

The temperature of the hot melt colloid should be strictly controlled within the scope of use. The temperature of the glue should not be arbitrarily changed. In special cases, the maximum tolerance is ±10 °C.

The pre-molding pot and the working plastic box should be cleaned regularly to ensure the cleaning in the plastic pot (box), to ensure the cleaning inside the pot glue (box), to prevent the precipitation and accumulation of impurities in the glue liquid and affect the accuracy of temperature control. Even the malfunction of the thermostat causes the phenomenon of colloidal combustion to occur.