Practice, the chemical composition of the new material proved to be very effective. The casting resin poured into the oil pressure sensor, and sealed inside the electrode, through a lot of stress tests, such as: long-term storage environment at 150 ¡æ, 150 ¡æ of the ATF oil storage 1000h, -40 ~ 150 ¡æ / 1 000 times the temperature shock cycle test, VDA durability testing and customer testing and mechanical shock, vibration testing, confirmed with DELO-MONOPOX GE720 very reliable sealing of the sensor seal (see Figure 2). In contrast, the use of epoxy and polyurethane potting the other sensors have emerged leakage. Table for the German Road Industrial adhesive material DELO-MONOPOX GE720 parameters.
 
Figure 2 sealed with the potting resin, the oil pressure sensor, its function and service life is guaranteed
DELO-MONOPOX GE720 some important parameters

Another highlight of the new material is stable electrical performance parameters. Compared with other materials, such potting sealant resin and dielectric constant ¦Å less affected by frequency. The temperature, the glass transition temperature is reached before 175 ¡æ, the dielectric constant was almost unchanged. Casting resin so you can see the impact on the electrical performance curve is very small.

Improve the adhesion by surface treatment

Medium and temperature of the sealing adhesive relay directly related to the tightness of the sensor. Depending on the different plastics, the adhesive strength may be very different. If the sensor surface residual release agent, sealing is recommended prior to surface treatment, such as flame treatment, plasma treatment or corona treatment. In most cases, only surface cleaning is very effective. Figure 3 for the use of epoxy resin adhesive potting compression and shear strength of PBT samples measured immediately after the adhesion and humidity storage conditions of different measurement results.

Figure 3 different surface treatments on PBT with epoxy adhesive and the humidity was measured immediately after the adhesion was measured impact of storage
Surface treatment systems must be carefully chosen because not every surface treatment method will improve the bonding strength. Unsuitable operating parameters and may even damage the plastic surface leaving adhesive less effective.

Integrated production line

One-component sealant dispensing process and application are closely related. For example, the potting pin or electrode can be achieved through the glue. Not very complex applications on the use of pressure - time control system can be. Of high demand, can use the screw dispensing system dispensing or volume, often using jet dispensing valve. If the potting larger space, consider using the vacuum casting equipment.

DELO-MONOPOX GE720 is the thermal curing products. Oven depends on the choice of different operating requirements. For example, casting parts can be placed in the volume of air convection oven curing. Basically, the use of more powerful infrared heating or induction heating can be achieved quickly online curing.