Vacuum freeze dryer is suitable for the drying of materials such as high-grade raw material medicine, Chinese herbal medicines, biological, dehydrated vegetables, chemical industry, and pharmaceutical intermediates. It can be seen that it is widely used in the pharmaceutical industry. The advantage of vacuum freeze-drying is that it can reduce the possibility of the material being oxidized and degraded, eliminate the bacteria in the material, ensure the quality, and the original shape of the material can be well preserved.
After the vacuum freezing and drying equipment is turned on, the materials are put into the material box for freezing and the freezing process of the materials. On the one hand, vacuum is used to pull a part of the water away; on the other hand, when the material is frozen, the moisture contained in some molecules is discharged to the surface of the material. After the freezing requirement is reached, the material is heated by the heating system. Drying, evacuation of the water contained in the material to the freezing trap box frozen, to achieve the material freeze-drying requirements.
When the device is lyophilized, it is necessary to maintain the good quality of the product while achieving a faster drying rate. The latent heat required for sublimation must be transferred from the heat source through the external heat transfer process to the surface of the material to be dried, and then transferred through the internal heat transfer process to the actual occurrence of ice sublimation within the material. The generated water vapor must reach the surface of the material through an internal mass transfer process and be transferred to a vapor trap (cold trap) through an external mass transfer process.
Any one process or several processes together may become the “bottleneck†of the drying process, which depends on the design of the freeze drying equipment, the operating conditions, and the characteristics of the material being dried. Only at the same time improve the heat transfer, mass transfer efficiency, increase the surface area per unit volume of freeze-dried material, can achieve faster drying rate.
At present, the development prospect of the entire pharmaceutical machine industry is very broad, and the drying equipment industry is also the same, but it is worth noting that the industry investment costs are also high. Therefore, manufacturers must follow the trend of development and strengthen the vacuum freeze-drying equipment. Applications.
Terry Towel Warp Knitting Machine
Terry Towel Warp Knitting Machine is a highly-speed warp knitting machine, which running speed could up to 1,300RPM. Thanks to advanced technology and carbon fiber material widely used, warp knitting terry towel machine becomes more stable and higher productive compared with other terry machines.
A-ZEN TS4-C terry towel warp knitting machines, which also be called KS4FBZ, is equipped with Germany Needles, Carbon-fiber Needle bed and bars, laser-stops device as well as other market-tested spare parts, because of which A-ZEN terry towel machines gain a market acceptance since last 4 years.
Piles of warp knitting terry could reach to 6mm while back side of terry could be 3-4mm. The weight of warp knitting terry usually from 200-400gsm. Microfiber Polyester, Polyamaid and cotton yarn are available in warp knitting terry machine.
Technical Data:
Working Width/Gauge: 186"/ E24;
Working Speed: 50-1300rpm (Depends on yarn and designs);
Pattern Drive System: Pattern Disc or EL Drive (Optional);
Yarn Let-off Device: Electronical Yarn Let-off System;
Fabric Take-up: Electronical Fabric Take-up System;
Batching Device: Electronical Batching Device;
Laser Stops Detector;
Individual Terry Pile Brushing Device;
Online Service Supported.
Details please check machine leaflet.
Terry Towel Warp knitting machine,Terry machine,Microfiber towel machine
CHANGZHOU A-ZEN TEXTILE TECHNOLOGY CO.,LTD , https://www.tricotmachinery.com