Polyester can be dyed in different method. Polyester fabric dyeing with high temperature- high pressure is the best method that is basically followed in our industries. This process requires high temperature in between 130 - 132℃. and requires high pressure up to 3.036 Kg/cm2. To penetrate the disperse dye molecule inside the fiber, either liquor or material needs to circulate. At elevated temperature, the circulation or agitation helps to swell the fiber and allow the dye molecules to penetrate inside the fiber.
This blog post aimed to provide insights into the techniques used to measure temperature from pressure, highlighting the importance of this method in scientific and industrial contexts. Whether you’re a professional in the field or an enthusiast, understanding these measurement techniques is essential for grasping the complexities of thermodynamics.
In a closed vessel, the temperature and pressure are related by Gay-Lussac’s Law. This law states that if the volume of the vessel is constant and no gas enters or leaves the vessel, the pressure of the gas is directly proportional to its temperature (measured in Kelvin). This means that as the temperature increases, the pressure also increases, and vice versa.
The mathematical relationship is expressed as:
P∝T
where, ( P ) represents the pressure,
( T ) represents the absolute temperature in Kelvin.
So, if you were to increase the temperature inside a closed vessel, you would also increase the pressure, assuming the amount of gas and the volume remain unchanged.
In the realm of physics and engineering, understanding the relationship between pressure and temperature is not just a matter of theoretical interest but a practical necessity. Various processes and systems depend on accurate measurements of these fundamental properties. While temperature is typically measured directly using thermometers, there are scenarios where it can be deduced from pressure readings.
The formula described here below seems to be a non-standard expression relating pressure and temperature. Typically, the relationship between pressure and temperature in a closed vessel is described by the Ideal Gas Law or Gay-Lussac’s Law for constant volume conditions. However, the expression provided:
T = 
where ( P ) is pressure and ( T ) is temperature, does not correspond to any standard gas law. It may be a specific empirical formula derived for a particular system or set of conditions. For standard conditions and ideal gases, the relationship is linear and direct, as described by the Ideal Gas Law and Gay-Lussac’s Law:
If you’re working with a specific scenario like U-tube jet machine or long-tube jet machine, generally this formula applies. [Yet, it would be important to refer to the context or to check the correctness of the formula at your end]
This means that if the temperature inside the closed vessel increases, the pressure will also increase, provided the volume doesn’t change. Conversely, if the temperature decreases, the pressure will also decrease. This relationship is particularly important in understanding the behavior of gases in various conditions and is a fundamental concept in thermodynamics and physical chemistry.
Temperature (0C ) Pressure ( Kg/cm2 )
100 1.000
110 1.464
120 2.074
130 2.856
132 3.036
