Why use RF heat sealing to generate heat vs. applying heat energy direct?
Both methods accomplish the same end result, which is to get the plastic hot enough to weld together. The direct application of heat is referred to as ‘impulse sealing’. However, just as your microwave heats a lot faster than your regular oven, a RF heat sealer heats the material more quickly than an impulse sealer. Consequently, the rate of production increases significantly. In addition, plastic heated with RF energy cools down more quickly than plastic heated by conventional methods, which means it is safer to handle, comes off the machine more quickly, and keeps its shape better immediately after the sealing process. Why is it important to use a buffer with RF heat sealing? Another difference between sealing with conventional heat versus RF energy is that when using the RF method, a buffer is needed beneath the material to be sealed. Why? Believe it or not, the purpose of the buffer is to require you to use more RF energy to seal. As you seal, the plastic is melting and reducing in
