Thermo cool (Cooling base)

• Can measure warm/cool feeling evaluation value \"q-max\".
  q-max is the peak value of heat current measured immediately after the heat stored on a pure copper plate (area: 9cm², weight: 9.79g) travels to a specimen when the plate touches the surface of the specimen.
  In other words, it accurately reproduces the warm/cool feeling (hear transfer) experienced when a human finger touches an object. (Standard: sensitivity to coldness / option: sensitivity to hotness)
• Can measure thermal conductivity and heat diffusivity.
  The pressure applied to the specimen can be varied when taking measurements.
• Can maintain temperature while taking measurements.
• Various measurement methods can be considered according to the purpose, such as the wet method, space method and wet-space method.

• Fabric Products
• Cooling Sheets
• Food Products
• Cosmetics and Toiletries

I Measurement of q max (warm/cool feeling measurement)
1) q max is the value measured by the following system.
Build up the heat in solid copper plate (0.41855 J/ ºC) with 9cm² of area and 9.79 g of mass, on touching the upper surface of sample , stored calories will pass to the sample’s lower temperature side. The peak value (will reach to the peak in 0.2 second after contact by the filter) of the moved heat current is what we call q max. Namely the signal passes the initial proportional factor of a time constant of 0.2sec. This filter simulates the heat conduction that is considered to relate to the warm/cool feeling felt when the skin layer touches objects.


2) The bigger q max value, the cooler; the higher the q max value, the warmer. q max is in proportion to –T, which is the difference between initial copper plate temperature To and the sample temperature Ts. It also relates to the contact pressure. 10gf/cm² is used as the standard test (the weight of TBOX is 90g, the area of TBOX heat plate is 9 cm²).