4 сентября, 2015 
Malyar In general, one should ensure that operation of the machine is in accordance with the manufacturer’s instructions, being sure to set the machine according to the adhesive supplier’s specifications for line speed, operating temperature, and adhesive coating weight. During application, the following guidelines should be observed:
1. Adhesive reservoir temperature: 204° C
2. Application roller temperature: 191°C (application roller to be 12 to 13°C lower than reservoir temperature)
3. Adhesive application weight: 200 to 250 g/m2
4. Melting time of adhesive: 1| to 3 h
Correct application weight and spread of the hot melt can be checked by bonding a transparent poly(vinyl chloride) (PVC) strip and applying at a pressure of 2 to 4kg/cm2. If the correct pressure has been applied, the pattern caused by the applicator wheel on the adhesive should disappear, with little or no squeeze-out at the edges. The adhesive reservoir must be filled completely and the lid kept in place, to avoid heat loss. It is necessary to clean gluepots thoroughly at regular intervals, as well as filters, nozzles, and glue lines (every 2 to 4 weeks). Suitable solid hot-melt cleaners, available from adhesive suppliers, have largely replaced the traditional use of cleaning solvents. The applicator wheel or roller is used at a pressure of 2 to 4 kg/cm2.
Опубликовано в рубрике 