Almost all raw plastic material seems dry. All the same, everything is not always what it appears. To appoint just three, hygroscopic materials specified as Polycarbonate, Nylon, and PET draw in moisture from the close air. And so, though it is made up “dry”, by the time it arrives at the processor, it will have a few moisture substances.
A chemical reaction (hydrolysis) falls out during working on it, making the elongated polymer chains into short pieces. Long polymer chains are needed to create a good product. Merely short chains lead to poor-quality plastic mouldings.
Try to process raw materials that bear moisture substances. You could find out a count of at long last expensive issues, specified as product quality in terms of intensity and appearance.
It would better be taken into account that drying more than the material requires for too long or at too high temperatures is possibly disastrous. If colouring pigments are being utilised, over-drying out and too long residency time in the drying procedure can cause changes in the colour, perhaps making it darken.
So what are the alternatives acquirable to plastics processors to assure that their raw material is in the best condition for working on? Flying Tigers offers a wide range of Dehumidifying Dryers commonly used in the plastic industry. You can use these dehumidifying dryers to make the raw materials in the best condition for processing.
1. Dehumidifying Dryers:
Dehumidifying Dryers are designed to eradicate moisture in the plastic material prior to processing. Air is pressured through a desiccant bed to create it highly dry out. This air pressure is then heated up to a fixed temperature and fed into a Drying Hopper carrying the material to be dried out. This hot, dry air pulls the moisture out of the plastic material; the concentrated air is then fed out of such Drying Hopper and rearwards through the desiccant bed once again to remove the moisture before the cycle starts again.
This desiccant has a confined ability to carry water before it requires to be reformed (dried out). Commonly, plastics processors utilise regenerative or duplicate tower dryers. In that case, as the desiccant bed has attained its moisture-retaining capacity, the flow of air is automatically changed to the second desiccant bed to let the drying procedure proceed. At the same time, the first desiccant bed is reformed by heating to move out moisture, permitted to cool, and is then geared up to draw moisture over again.
2. Rotary Wheel Dryers:
Rotary Wheel Dryers have been planned to deal with energy and additional revenue running out consequences presented by different sorts of drying. Rotor Dryers have a steady dew point, whereas, in duplicate desiccant dryers, the dew point begins low and just increases as the desiccant bed impregnates. As the flow of air is switched to the second desiccant bed, the dew point then sets out low once again.
A dew point check is a design characteristic of Rotor Dryers that permits the user to choose a dew point appropriate for the material to be worked on and keep this. This is an incredibly beneficial characteristic as it nearly eradicates over-drying. A few models of Rotor Dryers can lay aside 40% in energy consumption compared with the most effective duplicate desiccant dryers due to a less regeneration temperature. This figure depends on the maker of the dryer and can be less while only a three-stage circuit technology is the start of the design. Four-stage technologies are acquirable.
Rotor Dryers use a rotating wheel that endlessly puts dry-out desiccant into servicing due to its power to reform concentrated desiccant in the rotational cycle. Whereas the desiccant bed utilised in conventional Dehumidifying Dryers contains desiccant beads and clay binder, which demeans, Rotary Wheel Dryers apply in the area of three times the sum of pure desiccant. Desiccant beds on duplicate tower Dehumidifying Dryer’s reform at 320c; all the same in the Rotor Dryer it is an energy-saving up 140c. They do not utilise cooled water and do not need compressed air.
3. Low-Pressure Dryers or Vacuum Dryers:
Low-Pressure Dryers or Vacuum Dryers speed up the plastic stuff drying out procedure by utilising a vacuum to bring down the boiling point of water from 100 °C to 56 °C. The moisture is quickly extracted from the heated-up material. These are getting it out in a condition to be formed or squeezed out. Commonly, these Low-Pressure Dryers will dry out materials in one-sixth of the time needed by a desiccant dryer.
The utilisation of a vacuum provides a lot of procedure and revenue benefits compared with traditional drying out methods. This process of drying out does not utilise desiccant in the least and in and of itself saves up the expense and time needed to keep and replace the desiccant. These machines’ low drying out times bring down the risk of material abjection from disclosing material to long elevated drying out times.
4. Compressed Air Dryers:
Compressed Air Dryers, thick and light in weight, are planned to meet the requirement of the processing machine, though a free-standing border can be utilised.
Typically a drying-out process utilised for more modest throughput machines, the Compressed Air Dryer is likewise equipped with duplicate desiccant beds as the Dehumidifying Dryer. The primary difference between the two is that flow of air is engendered by compressed air rather than electrically driven mechanistic blowers.
5. Hot Air Dryers:
Before working, Hot Air Dryers are organised to take out surface moisture from non-hygroscopic plastic material and preheat material. This preheating is precious in conditions where stuff has been stacked away outside at low temperatures and is brought into more warming and humid circumstances for processing. These commonly contain a well-isolated hopper with a tied blower and heater. Hot air moves through the plastic material granules, and the wet air is driven out into the atmosphere.
Flying Tiger KJ Co. Ltd is among the leading plastic moulding companies. It is the first developer in Taiwan to launch a range of technology and manufacturing for plastic manufacturing. The company not only offers services but products as well, including the best plastic moulding services to its customers to give them the best they deserve.