Wet curtain microwave drying technology
Wet curtain , also known as curtain , the performance of the honeycomb structure is made ​​of paper processing . In our country there are so few brands : Yi Fu Tak , soil Wo , three and , Yao Shun , Pacific , etc., are generally divided into corrugated high 5mm, 7mm and 9mm three , ripple is divided into 60 ° × 30 ° staggered pairs location and 45 ° × 45 ° staggered opposite , high-quality wet curtain microwave drying polymer materials using the latest technology to produce cross-linking and space , with strong absorbent , strong water resistant, anti- mildew and long service life and other advantages . Large surface area and surface evaporation , cooling efficiency up to 80% , and there is no surface -active agents , natural absorption , diffusion rapid , long-lasting performance. A drop of water 4 to 5 seconds can spread out . International standards for the industry is 60 ~ 70mm/5min natural absorption or 200mm/1.5hr.
Wet curtain manufacturing process is generally sizing - dry - pressing corrugated - stereotypes - glue - Cure - Slice - grinding - to taste like. Quality wet curtain does not contain any skin allergies phenol and other chemicals used to install no effect on the human body , green, safe , energy saving, environmental protection and economic . Such applications are generally three aspects: poultry and livestock , greenhouses and horticulture , industrial cooling.
Microwave is a very short wavelength of electromagnetic waves (i.e., wave length of 1 mm to 1 meter ) it and the radio waves , infrared , visible light waves are all the same . Microwave is the frequency at 300 MHz to 300 GHz, with a penetrating properties of electromagnetic waves , commonly used microwave frequency of 915MHz and 2450MHz. Microwave heating hundreds of millions of times per second rely speed through the cycle within the material of the microwave , polar molecules interact with the material , the material in the polar ( such as water molecules ) absorb microwaves and change its original performed on the same molecular structure as polarities movement speed , resulting in frequent collisions between them and generate a lot of frictional heat , so that the various parts of the material obtained at the same instant heat and temperature , heating successive generation , expanded and evaporation occurs , to achieve the purpose of heating and drying .
Microwave frequency electromagnetic field in a rapidly changing molecular interaction with matter , is absorbed and thermal effects , the microwave energy is directly converted to medium heat, microwaves are absorbed by the object , the object from the raw heat, heat from the object inside, outside and began , both inside and outside can be heated , the type of material to absorb the microwave different capacities , the heating effect is different, depending on the material of the dielectric loss . Water is a very strong material absorb microwaves , generally a substance containing water can be heated with microwaves , rapid and uniform to achieve a good drying effect .
After various drying methods of testing and comparison , microwave drying because the material inside and outside simultaneously heated , thus achieving high efficiency . And there is odor microwave drying function , the product quality has been greatly improved, and economic benefit.

 

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