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FAQ
Drying and Dehumidifying
Q1.which model could be suitable for drying PA+GF Material? What is the difference between the hopper dryer and honeycomb dehumidifier for drying above material?
There are two methods to meet this application:
1.Dryer with dehumidifying function, such as ALL-IN-ONE compact dryers SCD which includes dehumidifying,drying and conveying functions; Dehumidifying dryers SDD which include dehumidifying and dyring functions.
2.Common dryers without dehumidifying function, such as Euro type hopper dryers SHD-U, hopper dryers SHD and compact dryers SDL ro SDL-U.
High temperature drying effect would be affected by ambient humidity except for cold area, such as northern in China, but the dyring effect of dehumidifiers could not be affected, so we suggest to use SDD or SCD because PA mateial have good hygroscopicity.
1.Dryer with dehumidifying function, such as ALL-IN-ONE compact dryers SCD which includes dehumidifying,drying and conveying functions; Dehumidifying dryers SDD which include dehumidifying and dyring functions.
2.Common dryers without dehumidifying function, such as Euro type hopper dryers SHD-U, hopper dryers SHD and compact dryers SDL ro SDL-U.
High temperature drying effect would be affected by ambient humidity except for cold area, such as northern in China, but the dyring effect of dehumidifiers could not be affected, so we suggest to use SDD or SCD because PA mateial have good hygroscopicity.
Q2.Customer is using the SCD for one of the PET Preform machine and now have added second PET Preform injection machine. Check the possibility if we can use this SCD for the two machines simultaneously?
It is impossible to have any change on the original machine. You should change electric part and mechanism part. Because the machine, which can provide dyied material for two molding machines, is controlled by PLC and touch-screen.
For this situation, we suggest that you order SAL-900G2 with SVH-12L, in conjunction with a suction box of SBU-160-38D to finish above-mentioned function. When using, just run vacuum hopper on the SCD and close the SVH on SCD and shut-off value. Please refer to the usage of SAL-900G2.
For this situation, we suggest that you order SAL-900G2 with SVH-12L, in conjunction with a suction box of SBU-160-38D to finish above-mentioned function. When using, just run vacuum hopper on the SCD and close the SVH on SCD and shut-off value. Please refer to the usage of SAL-900G2.
Q3.We are a packing film supplier, main material we use is uncrystallized PET material, which model can meet our requirements?
Becase of using uncrystallized PET material, it is needed to select SCR (PET crystallizer) to processe PET in advance before drying in case PET get block. Based on the capacity, we suggest folliowing machine:
Crystallizer: SCR-900U
Dehumidifying and drying system: SD-1000H+SHD-2000U+ACF-5" +5” dehumidifying pipe system with stainless steel pipe.
Crystallizer: SCR-900U
Dehumidifying and drying system: SD-1000H+SHD-2000U+ACF-5" +5” dehumidifying pipe system with stainless steel pipe.
Q4.Could SCAD dry material such as PA? Does it have dehumidifying function? How to get better drying effect?
This series of SCAD have no dehumidifying function, it uses the pressure dew-point of high-pressure air when it released into the atmosphere to reduce dew-point value. For example, high-pressure air 0.59MPa, 20℃,when it releases into the atmosphere ,its dew-point is about -7.7℃. The dew-point value of SCAD is about -5℃~-10℃. Base on above-commention, SCAD is unsuitable for drying PA which have good hygroscopicity. It is possible to get better dehumidifying effect when it works with HDD(heatless dehumidifying dryer) which can make the dew point of air reach down to -40 celsius degree.
