Laboratory heat sealer is a very common used testing instrument in the flexible packing industry. The capability, feature and size of the machine depends in its use in different industry. Whatever be the size, the equipment works on the same principle. When heated the sealant molecules get bonded to each other and get adhered with the substrate. There are various things which must be kept in mind when you wish to obtain a perfect seal.
The sealing pressure is also very important. In order to achieve a strong adhesion bond, it is vital to put required amount of pressure. In case right amount of pressure is not applied, it can be the case that the package generate leak of air or liquid. And this can lead to product failure. If the outside air is coming inside, then it can also harm the content inside.
Another thing is the dwell time, it is the time duration which is required to form the adhesion bond between the substrate and the seal. In case the dwell time is high it can be weaken after cooling down. It is a very important thing for the material and sealer both.