A Look at Kapton Polymide Tapes
Kapton POLYIMIDE TAPE or films are made using silicone adhesives. They are found to be compatible with a large temperature range like the low 269°C or -452°F and as high as 260°C or 500°F. The chemical nomenclature for Kapton K and HN happens to be poly or (4,4′-oxydiphenylene-pyromellitimide). It is manufactured by the condensation of 4,4′-oxydiphenylamine and pyromellitic dianhydride. This implies that Kapton is made by using dianhydride in step polymerization process. The intermediate polymer called as poly or amic acid, happens to be soluble due to the strong hydrogen bonds in the polar solvents generally used within the reaction. The closure of the ring happens at high temperature.
The Uses of Kapton
Kapton displays high thermal conductivity at as low temperatures as 0.5 to 5 kelvins. This, along with Kapton’s good dielectric capabilities as well as its availability in thin sheet form has made Kapton a favorite material for cryogenics where it offers good electrical insulation even for low thermal gradient. Kapton POLYIMIDE TAPE is also used to make thermal micrometeoroid garments or the outer layer of the space suit and flexible printed circuit or flexible electronics. In addition, electrical wiring used in military and civil aircrafts is insulated using Kapton as it is light compared to other insulators with good temperature and insulating characteristics.
Kapton is also used regularly like an insulator within extremely high vacuum environment because it has less out gassing rate. It is also used to bind components like thermocouples to hot-ends of 3D printer extruder. However, care needs to be taken as thermocouples that are insufficiently attached may detach and lead to overheating of nozzle, and cause fires. Kapton is also widely utilized in the manufacture of windows of different types at X-ray sources such as synchrotron beam-line and X-ray tube as well as X-ray detectors. It is a preferred material due to its high thermal, mechanical stability and good transmittance to X-ray. Kapton is also resistant to radiation damage.
Benefits of Low Static Kapton Masking Disc
Low static Kapton masking discs have silicon adhesive that do not leave any kind of residue. This low static Kapton tape is 1 mil thick along with a 1.5 mil of silicone adhesive thickness. The Kapton masking discs are able to withstand temperature of nearly 500°F or 260°C. These are packaged within a 3″ core. The low static Kapton masking discs conform to MIL SPEC MIL-P-46112 Type I. They have peel strength of 500 +/- 100 and tensile strength of 20 lbs/in. The elongation is less than 50 percent. It has a static charge unwinding of 50 V and static charge peel off of 50 V.
Features of Low Static Kapton Discs
The low static Kapton masking discs are conformable and then enabling the masking of uneven surface. It removes neatly without any adhesive residue even after getting exposed to temperature. High strength backing offers ultimate resistance to tear and puncture. It is resistant to chemical attack. The low static Kapton disc has a dielectric strength of almost 6,500 V. These masking discs are mainly utilized for circuit board production, high temperature masking, wave soldering, insulation on coils, motors and transformers, protection of the circuit board while wave soldering, solar panels and similar other such applications wherever static charge can be a concern.
The low static Kapton masking discs have high dielectric strength. It is used in protecting printed circuit board gold finger contacts while wave soldering and is used in insulating electrical applications having class H requirements. The low static Kapton tape displays resistance to oils, solvents, and acids. It is RoHS compliant and is available in custom sizes and shapes.