Instruction for the correct washing of polycarbonate molds

In this area we wish to provide our customers with simple but important instructions for a good maintenance of our molds. As a matter of fact, a suitable washing allows both an excellent result in the following production and a remarkable extension of the molds life.

It is necessary for the washings to be performed regularly, if a production cycle allows doing so. In detail, we recommend for the molds to be stored perfectly clean. The washing of the molds should be made preferably with specific washing machines for the molds washing, but the remarks you will find below may also be performed for hand washings

  • First of all we recommend never remove the chocolate residues with rough clothes or sponges, because they would definitely damage the mold surface.
  • The water used for washing must be demineralized or reverse-osmosis water, because a high hardness of the water may compromise the surface of the molds letting halos after washing. Further to this, water has a hydrolytic effect on polycarbonate, causing polymer degradation. This effect is time and temperature dependent. Higher temperatures causing a quicker degradation of the polymer.
  • Up to 50° the hydrolytic effect is so slow it can largely be ignored but above 50 degrees C, hydrolysis degradation start to accelerate and for this reason we recommend limiting the wash temperature to a maximum of 55 degrees C.
  • The cleaning agent used must be a soft product, suitable to wash polycarbonate molds, or at least with a low alkaline content. Our company can provide a specific product to wash our molds; in any case, no matter you use our specific cleaning product or other products, we recommend to always following dosing indicated by the manufacturer.
  • To rinse the molds, we recommend adding water to the rinse aids. Its action allows the water to slip away from the surface of the molds, avoiding thus any halo.
  • Another very important feature is the water pressure used both in washing and rinsing the molds. We recommend that the pressure does not exceed 2 bars.
  • For any washing inside the mold washing machine, we have a final remark: the drying temperature should never exceed 70° C (for moulds realized BPA free the temperature has to be reduced a lot).

Finally, we remind our customers that also a correct storage shall allow a greater life to our molds. Therefore we recommend storing the molds on perfectly flat surfaces and slightly lifted form the ground.

The molds must be packed in closed boxes and most of all far from the light or heat sources.