Teknoseal manufactures the TSP 99 range of vacuum impregnation sealants used in the Impregnation process. These impregnation sealants are widely used throughout the world for various types of components, some of which are the following.
Metal castings
The introduction of vacuum impregnation sealants in porosities avoids micro porosity leakages and field failures during the working life of a metal casting. Micro porosity Leakages in critical application such as the automobile engines could lead to engine failures on the road leading to expensive loss of the time and money and also would compromise safety during the working life of the engine. Vacuum Impregnation is a quality assurance process to ensure that a good casting would never leak during the life of the casting. Apart from the automotive industry, impregnation is also widely used as a quality assurance process for all casting which need to leak tight/pressure tight during its ultimate application also in oil and gas application and the pump, valve, and pneumatic industries. Further impregnation is now also a mandatory process for all castings used in inert gas applications such as helium, nitrogen, SF-6 etc and also in the computer hard disk industry.
Electrical components
Vacuum impregnation is widely used for electrical and electronic connectors and also for wire harnesses. Vacuum impregnation prevents the ingress of moisture, acids and alkalis in the micro fine gaps between the metal conductor and the plastic molded body of electrical connectors. When the metal connector is molded into a plastic housing during the plastic molding process, invariably micro fine gaps would exist between the plastic and the metal. Vacuum impregnation helps to seal these gaps.
In the case of wire harnesses, vacuum impregnation helps to seal the micro porosities in the plastic insulation/ plastic sheath over the copper or aluminium wires. If impregnation is not done, these micro porosities in the plastic insulation may lead to ingress of moisture leading to sparking between the electrical wires.
Sintered Powder Metal components
Powder metal sintered components are naturally porous on account of the manufacturing process. In case of powder metal parts, impregnation seals these porosities and eliminates the possibility of internal corrosion and also makes the parts leak tight in case it needs to pressure tight in its ultimate application. The machinability of powder metal parts is greatly improved since impregnation reduces the tool chatter. This, in turn, extends the life of cutting tools many times.
Wood
Wood subjected to the vacuum impregnation process prevents the entry of germs and bacteria and also moisture into wood substrate, thereby it does not allow the wood to rot or decay. Moreover, the process also improves the machinability of wood and also improves its compressive strength. This application is very useful especially in the pharmaceutical and packing industries and also for home building.
Wood used for decorative purposes like door handles etc, if impregnated have a very machine finished and thereby has a very good surface for the onward plating, painting and other decorative surface finished processes to be used.
Composite materials
Impregnation fills up the gaps in the laminates and enhances its strength. The expenses for vacuum impregnation are low when compared with compression molded laminates. Also, impregnated laminates have a lesser density than compression molded laminates.
Due to the large number of benefits listed above, vacuum impregnation is recommended in various industries that use ferrous and non-ferrous metal castings, electrical components, wood and composites. Teknoseal has proven records of all the above benefits after usage of its range of vacuum impregnation sealants.
