Premium PTC heating General?
Premium heating element structure
Strong Point of Premium PTC Heating Film
| Section | Material | RexVa's Premium PTC Heating film | Other's |
| Heating Parts | PTC Carbon Paste |
Using carbon paste with the function of self-regulation Making the carbon paste by RexVa's research center. Electric conductivity and improving the strength adhesive Without the crack on the surface of carbon paste after using a long time Constant of resistance and keeping uniform in heating Dispersion the heating to the both side when heating film is overheated on the middle heating parts As PTC heating system, that can control the temperature and saving the 20%-30% energy. |
Carbon paste producers Or imports of liquid-type carbon compound with thermosetting adhesive added through imports, and the resistance change is severe because the optimum condition due to seasonal temperature is not maintained This liquid type carbon is sparked due to surface cracking of carbon heating element when using heating heat, and it is transferred to dangerous element. Since the carbon resistance value, which is the disadvantage of the surface heating element, can not be kept constant, there is a large variation in the heating area on the area of 1 m 2 If the heating film length is increased, the deviation becomes more severe. There is a phenomenon that the controller is burned out due to overloading 1Roll measured in watts in 1m increments are very different |
| Copper Busbar | Tough Pitch Copper 15mm (Electric conductivity 106%) |
The thinner and wider the copper foil, the higher the allowable current RexVa's manufacturing method is a high-precision thermal laminating process which eliminates air layer formation of carbon paste layer. |
The other other's company manufacturing method is a method of bonding a copper foil bus bar using an adhesive agent. When the flatness of the cushioning and the floor of the heat insulating material is not constant, a separation phenomenon occurs due to a wave phenomenon |
| Silver Paste | 45% Silver18mm |
It has high conductivity and does not load current flow Increasing the electricity efficiency The higher the content of silver and the larger the area, the better the current flow and the less the spark and the load |
General surface heating element has a structural disadvantage that it does not apply silver paste and sparks due to shrinkage and expansion due to heat generation at wave and clearance. |
| Base | PET(VTM-2) Premium white PET |
Using VTM-1 Class and the best quality white PET Good effect of dampproofing and heatin-resisting Prevention of danger when occur sparking |
Element has low cost by using LLD (PE series) material and nonwoven fabric for maintenance of shape and electricity cut, but PE series material is weak to moisture and there is risk of fire transition when spark occurs. Spreading the fire when occur sparking Heat curing type urethane is hard to use for a long time due to heat generated by hardening phenomenon |
| Gravure printing equipment | Drying System |
Printing the carbon paste and Silver at the same time lessen the difference of resistance and improving quality |
General surface heating element is adhesive laminating equipment, there is no drying system, and after rewinding the product, it is hard drying method. If the carbon paste is not dried, laminex laminating is very weak to impact and humidity. As the resistance value changes, the temperature of the heating part changes frequently, and the quality is poor as a heating heating element. |
Premium PTC Film temperature performance test
Temperature performance test
Test Name : DC300V, 60Hz, 1,000mm*1,700mm, 700W( Korea's famous Bed manufacturer G Company)
The Method of Test : Installing K type sensor on the 9parts and covering the padding on the surface of heating film. Removing the padding and check the temperature
Temperature sensor installation photo
Laboratory conditions(Temperature / Humidity) : 21~23℃/52~53%
Test regulator New Ostar(Uriel)
Test meter(Lutron Co.)
Installation location of Temperature
Number 1~9 : thermographer K-type measuring sensor
Temperature sensor : thermostat control 5kΩ thermistor
Covering a thin blanket
Without a thin blanket
Temperature change graph with time
Notice : Indicates changes in laboratory temperature conditions
The following is the result of measuring the surface temperature of each part while maintaining the film maximum temperature state by removing the temperature sensor controlled by the regulator.
| Elapsed time | Average temperature value for each channel(1 hours) | MAX | MIN | RANGE | |||||||||
| CH-1 | CH-2 | CH-3 | CH-4 | CH-5 | CH-6 | CH-7 | CH-8 | CH-9 | CH-10 | ||||
| After 1hour | 62.2 | 61.7 | 61.3 | 62.4 | 63.2 | 57.0 | 60.8 | 68.5 | 63.6 | 24.9 | 68.5 | 57.0 | 11.5 |
| After 2hour | 62.9 | 62.1 | 61.9 | 62.4 | 63.9 | 57.7 | 61.5 | 69.3 | 64.1 | 24.8 | 69.3 | 57.7 | 11.6 |
| After 3hour | 63.6 | 62.3 | 62.1 | 62.5 | 64.1 | 58.0 | 61.8 | 69.8 | 64.0 | 24.6 | 69.8 | 58.0 | 11.8 |
| After 4hour | 64.1 | 62.6 | 62.2 | 62.7 | 64.5 | 58.2 | 62.2 | 70.4 | 64.1 | 24.5 | 70.4 | 58.2 | 12.2 |
| After 5hour | 64.0 | 62.1 | 62.2 | 62.5 | 64.3 | 57.9 | 61.8 | 70.2 | 63.8 | 24.2 | 70.2 | 57.9 | 12.3 |
| After 6hour | 63.8 | 62.0 | 62.2 | 62.1 | 64.2 | 57.7 | 61.7 | 69.9 | 63.6 | 24.1 | 69.9 | 57.7 | 12.2 |
| After 7hour | 63.5 | 61.9 | 62.2 | 61.6 | 63.9 | 57.5 | 61.5 | 69.5 | 63.3 | 24.0 | 69.5 | 57.5 | 12.0 |
| After 8hour | 63.8 | 62.3 | 62.7 | 61.9 | 64.3 | 57.8 | 61.9 | 69.8 | 63.7 | 24.0 | 69.8 | 57.8 | 12.1 |
| 9시간 후 | 63.6 | 62.1 | 62.5 | 61.8 | 64.1 | 57.6 | 61.9 | 69.6 | 63.5 | 23.9 | 69.6 | 57.6 | 12.0 |
| After 10hour | 63.9 | 62.3 | 62.7 | 62.0 | 64.4 | 57.8 | 62.4 | 69.8 | 63.8 | 23.9 | 69.8 | 57.8 | 12.1 |
