Microwave Dyeing Mechanism and Process
Microwave energy application technology in the food , pharmaceutical , chemical and other fields has been widely used. In recent years, the application of microwave in the dyeing industry has also made ​​a breakthrough in cotton , acrylic , polyester and polyester blue cloth dyeing been applied and achieved good economic and social benefits.
First, the microwave heating principle:
Microwave frequencies from 300MHz ~ 300GMHz are electromagnetic waves , the direction and size of the periodically changing . Microwave and materials directly , ultra high frequency electromagnetic wave is converted into heat in the process of microwave heating process . Water is highly fire microwave absorbing material , the material of the water molecules are polar molecules under microwave irradiation , with its outer electromagnetic field polarity orientation changes , 915MHz microwave motion that the water molecules 1.83 billion times per second , resulting in a sharp molecular friction , collision , embassies and puffing heating material produces a series of microwave heating process to achieve the goal .
Second, the microwave heating characteristics:
1, the heat quickly and evenly
Without heat conduction process , it can instantly penetrate into the material to be heated , the penetration depth of up to a few centimeters , or even a dozen centimeters , seconds to minutes will be able to convert the microwave to heat . Selective microwave heating , will heat more evenly.
2 , energy efficient
Because the material contains moisture and heat easily absorb microwave and therefore , in addition to a small amount of transmission loss has almost no other losses. Infrared heating and microwave heating as compared to the energy saving 1/ 3 to 1 /2.
3 , mold sterilization preservation
Microwave heating with thermal effects and biological effects , can therefore be at a lower temperature to kill mold and bacteria .
4 , advanced technology , continuous production
Controlling the microwave power can be realized as long as the heating or terminated. It has the perfect delivery system to ensure continuous production, labor-saving .
5 , safe
Since the microwave energy is controlled by the metal of the heating chamber and the wave tube work, so the microwave leakage is effectively suppressed. No radiation hazards and harmful emissions , does not produce heat , not contaminate food , not pollute the environment.
6, the device small footprint, improve working conditions
Three , microwave dyeing process:
Padding liquor - Microwave heating stain - other related Process
Fourth, microwave dyeing equipment features:
1 , microwave dyeing fast. Normal just a few minutes , it's just a few traditional dyeing tenth time . This is the microwave heating mechanism and characteristics of the decision, dye it soluble in water, the water molecules are polar molecules in the microwave field, the external electromagnetic field with its polarity orientation and change , and then dye in the ultra- high-speed friction , impact , vibration , in the weaving, fibers penetrate the shuttle, spread the infection. Time is short, energy efficient.
2 , dyeing excellent quality . It is stained with a dye than the traditional process solid , uniform color . Is heated by the microwave permeability and selectivity of microwave heating characteristics of the decision .
3 , the microwave technology to solve the traditional dyeing vat dyeing machine storm water pollution , but also greatly improved the poor working conditions and labor intensity .