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PA Granules material dryer parameter
PA Granule dryer So what is the difference between PA dehumidifying dryer and ordinary dryer? Under what circumstances is the plastic desiccant dryer produced?
To understand this problem, we must first talk about ordinary dryers. Ordinary dryers use electric heating to heat hot air to dry materials inside the space at a high temperature, so as to evaporate water from the materials. The incoming air heated by the electric heating is the air in the environment. This is what we usually call a hot air dryer.
Therefore, under current weather conditions, incomplete drying of materials will occur. Because electric heating must first heat the incoming air, but the incoming air contains high moisture, how can the material be dried thoroughly? (Mainly reflected in materials with high moisture absorption rate, similar to nylon).
In view of the above situation, firstly, the ambient air is drawn in to remove the moisture in the air at a low dew point, and then relatively dry air is used to heat the material into the dryer to dry the material.
Therefore, the difference between these two dryers is that the moisture content of the inlet air used for drying is different. One has processed the inlet air moisture, and the other has not processed the inlet air moisture.
The parameters of the PA pellet dryer are different depending on the product, particle size or powder, and the drying and dehumidifying time parameters of the predetermined material are also different. For general, you can check the following comparison table.
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PA Particle dryer Equipment principle
PA Granule dryer can dry to a moisture content below 0.02%, and solves the shortcomings of poor transparency, sprue sticking, bubbles, silver bars, cracks, poor dimensional stability, internal stress, and insufficient product physical strength.
Dehumidification and drying feeding equipment series are composed of: non-heat dehumidification dryer, heat preservation type drying barrel and all stainless steel suction machine. The suction machine can transport the raw materials from the drying barrel to the forming machine, and can also transport the raw materials from the storage barrel to the drying barrel. According to customer needs, a kind of raw material can be delivered to two molding machines, vacuum motors and safety filter dust collectors are installed inside the machine. According to the production needs of different products, we can provide a powder-removing suction machine to separate the powder in the raw material and capture it. This device has a compact structure and is suitable for the production of precision injection products using engineering plastics such as connectors, precision gears, mobile phone communications, digital cameras and product size requirements, so that the moisture content of the raw materials after wet and dry is low and stable, which can meet strict requirements Technical and quality requirements.
Most engineering plastics are hygroscopic. When the plastic is taken out from the moisture-proof sealed packaging bag and exposed to the atmosphere, it will begin to absorb moisture from the atmosphere.
If it is a conventional hot-air barrel dryer, it is Humid external air can dry the plastic, so it cannot prevent the plastic from continuing to absorb moisture.
1. The internal circulation of the dehumidifier: through the operation of the compressor → discharge high-temperature and high-pressure gas through the exhaust port → enter the condenser for cooling → become a low-temperature and high-pressure gas → pass through the capillary tube → become a low-temperature and low-pressure liquid → evaporate and suck through the evaporator Heat → until the compressor becomes a low-temperature and low-pressure gas. So it goes back and forth.
2. The external circulation of the dehumidifier: under normal startup → through the operation of the fan → moist air is sucked in from the air inlet → passes through the evaporator → the evaporator absorbs the moisture in the air on the aluminum sheet → becomes dry air → Pass through the condenser to dissipate heat → blow out from the air outlet.
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PA pellet material dryer application
PA Granule dryer With the widespread use of engineering plastics, Dehumidifying dryers have gradually replaced traditional hot air dryers.
This is a device used to dehumidifying plastic resin to achieve drying. For example,
POM,ABS,TPE,PAL,ABS,CAB,EVA(2),EVOH,LM(4),LCP,PA11,PA6.46.6,PAI,PAR,PBT,
PC,PC/ABS,PC/PBT,PE.HDEPE,LDPE black3%,PE.HDEPE.LDPE black40%,PEEK,PE(1),
PEN,PES,PET,PETG,PI,PMMA,POM,PP,PPO,PPS,PS,[GPPS.EPS.HIPS],PSU,PIT,PUR,
PVC,SAN,SB,TPE,TPE,TPO,TPU,
| Material |
Initial Moisture Content |
Drying Time |
Drying temp. |
| ABS Acrylonitrile Butadiene styrene |
0.6% |
2~3 H |
80℃ |
| PA 6 Polyamide 6 |
1% |
4~6 H |
75℃ |
| PA 66 Polyamide 66 |
1% |
4~6 H |
75℃ |
| PA 6, 10 Polyamide 6, 106 |
1% |
3~4 H |
75℃ |
| PA 11 Polyamide 11 |
1% |
3~4 H |
75℃ |
| PA 12 Polyamide 12 |
1.8% |
2~3 H |
75℃ |
| PC Polycarbonate |
0.36% |
2~3 H |
120℃ |
| PE Polyethylene |
0% |
1 H |
90℃ |
| PE Polyethylene w/carbon black |
0.5% |
3~6 H |
85℃ |
| PET Polyethylene Terephthalate |
0.4% |
3~6 H |
160℃ |
| PETG Polyethylene Terephthalate Glycol |
0.1% |
6 H |
66℃ |
| PBT Polybuthyleneterephthalate |
0.4% |
3 H |
160℃ |
| PI Polyimide |
0.32% |
3 H |
120℃ |
| PMMA Polymethylmethacrylate |
0.7% |
2~4 H |
80℃ |
| PSU Polysulfone |
0.22% |
3 H |
120℃ |
| POM Polyoxymethylene |
0.25% |
3 H |
100℃ |
| PP Polypropylene |
0% |
1 H |
90℃ |
| PPO Polyphenyleneoxide (Norl R) |
0.13% |
3 H |
120℃ |
| PS Polystyrene |
0% |
1 H |
80℃ |
| PUR Polyurethane |
0.9% |
3 H |
90℃ |
| PVC Polyvinyl Chloride |
0.4% |
1 H |
70℃ |
| SAN Styrene Acrylonitrile Copolymer |
0.3% |
2~3 H |
80℃ |
| SB Styrene Hi-impact |
0.6% |
2 H |
80℃ |
| lonomer(SurlynR) |
1% |
2~8 H |
50℃ |
| VPE Crosslinked Polyethylene |
2% |
6 H |
50℃ |
| KODAR PETG 6763 |
1.8% |
4 H |
66℃ |
| PES Polyester |
0.6% |
4 H |
75℃ |
| CA Cellulose Acetate |
1.3% |
2~3 H |
75℃ |
| CAB Cellulose Acetate Butyrate |
1.3% |
2~3 H |
75℃ |
| CP Cellulose Propionate |
1.3% |
2~3 H |
75℃ |
| lonomer |
1.4% |
2~3 H |
90℃ |
Dehumidifier dryerand other plastic resins must be dehumidified and dried during the production process to improve the quality of the finished product.
PA pellet dryer series are mainly designed for high-efficiency dehumidification of engineering plastics with strong hygroscopicity. Using the honeycomb runner with ceramic fiber as the base material, which represents the highest technological achievements of today, as the core component, the dry air provided can easily reach -40℃ dew point, and ideally it can reach -50℃ or even lower dew point , And the dew point temperature is stable, ensuring the high quality and stability of the molded plastic products. The whole series adopts P.LD. temperature control system as standard equipment; also provides PLC control with LCD touch-sensitive human-machine interface and can monitor the dehumidification effect of the machine Dew point meter is optional, the maximum drying air volume of this product can reach 3000m3/hr. The plastic before molding must be dried to an orientation ratio of less than 0.02%, which is completely bad, sprue adhesion, burrs, bubbles, silver bars, flow marks, cracks, dimensional stability and internal stress. Product defects (for example, insufficient physical properties and strength) are caused by sufficient dehumidification of the plastic before molding. Especially for PET, PBT, PA, PC and other high water absorption plastics, drying equipment with an ultra-low dew point of -40°C is required.
PA Granule dryer, can be dried to a volume ratio of less than 0.02%, which solves the shortcomings of short circuit, gate adhesion, bubbles, silver bars, cracks, poor dimensional stability, internal stress and insufficient physical strength of the product. There are a lot more.
Mainly used in plastic products, automobiles, optical discs, experiments, communications, optics, etc.; the rotary honeycomb can reach a low dew point of zero bai for dehumidification and drying at -40°C. In the case of enhanced configuration, the dehumidification dew point can be as high as -50°C. It is a choice for high-precision industries.
PA Granule dryer Precautions
PA Granule dryer
(1) Ensure that the hot air is clean.
(2) Measures should be taken to prevent coke dust and avoid backflow of hot air.
(3) During the drying process of the material, all parts of the equipment in contact with the material must be cleaned and disinfected.
(4) For viscous materials, measures should be taken to minimize sticking.
(5) In order to improve the solubility, instant solubility, and dry products, they should be continuously discharged from the drying chamber quickly and packaged after cooling.
(6) The exhaust air temperature is allowed to exceed the requirements to ensure product quality and safety.
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