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  • PET Drying : Plastics Technology

    For instance, with PET processing, it is generally assumed that if there is 4-6 hours in the drying hopper at 325-350 F, the moisture will be reduced to less than 50 ppm. Husky machines rely on the heat from drying to process the material to achieve the cycle times they rely on and the quality of the product produced.

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    Guidelines for Drying PET - pstoughton.com

    Fig. 6 : Typical PET drying tempera- tures range from 300 to 350 F. When the drying air exits the top of the drying hopper, it has already given up a substantial amount of its heat content to the PET pellets. The air temperature exiting the top of a typical PET drying hopper will normally be in the range of 200 to 250 F.

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    How to Dry PET for Container Appli ions Plastics Technology

    Author: Pete Stoughton

    PET injection molding processing condition

    Drying. Drying is essential prior to molding. PETs are very sensitive to hydrolysis. Recommended ...

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    Polyethylene terephthalate - Wikipedia

    This is because drying the material in less than 4 hours would require a temperature above 160 C, at which level hydrolysis would begin inside the pellets before they could be dried out. PET can also be dried in compressed air resin dryers. Compressed air dryers do not reuse drying air.

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    Guidelines for drying PET. - Free Online Library

    RETURN AIR HEAT EXCHANGER Fig. 6 : Typical PET drying temperatures range from 300 to 350 F. When the drying air exits the top of the drying hopper, it has already given up a substantial amount of its heat content to the PET pellets. The air temperature exiting the top of a typical PET drying hopper will normally be in the range of 200 to 250 F.

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    polymer processing: PET drying

    Temperature - Process Temperature should be in the region of 145 170 º C Depending on the resin supplier and the drying time. Also check the Regeneration Temperature which should be around 200 230 º C depending on the maker. Time - Calculate or measure the time the material is in the hopper, this should be at least 3½ hours.

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    Drying of PET resin and PET flakes Figure - Plastic Materials

    Drying of PET resin and PET flakes Figure. The drying of a PET resin and reground PET flakes at temperature levels of 160-180oC to below 0.005% moisture content is essential for the production of amorphous multilayer polyester bottles. Polyester is an effective desiccant.

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