The method of solving the bad plasticizing of PVC edge-sealing strip

1, PVC edge of the bad phenomenon of plasticizing

(1) the surface of plastic layer has the phenomenon of toad skin.

(2) the temperature control is low, the instrument pointer reflects the low temperature, the actual measuring temperature is also low.

(3) the surface of plastic is black, and there are small cracks or small particles without plasticization.

(4) the plastic plywood stitches badly, there is an obvious trace.

2. The reasons of bad plasticization of PVC edge-sealing strip

(1) the temperature control is too low or unsuitable.

(2) there are hard-plasticized resin particles in plastics.

(3) improper operation, too fast screw and traction speed, plastic did not reach plasticization completely.

(4) during granulation, the mixture of plastic is not uniform or the plastic itself has quality problems.

3. The method of eliminating the bad plasticizing of PVC edge-sealing strip

(1) control the temperature according to the process regulation, and adjust the temperature appropriately if the temperature is low.

(2) it is necessary to reduce the speed of screw and traction properly and increase the time of plastic heating and plasticizing in order to improve the plasticizing effect. (3) using screw cooling water to strengthen plasticization and density of plastics.

When choosing the mould, the mould cover should be smaller and the pressure of the glue outlet should be strengthened.