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Thread: drying parameters for technomelt PA 638

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  1. #1
    Join Date
    Oct 2020
    Posts
    19

    drying parameters for technomelt PA 638

    hello All,

    Please I need your help to define drying parameters for Technomelt pa 638 because I face a bubbles issue on the material.
    N.B :
    Current parameters 50C/6 hours.
    Low-pressure injection.

    Best Regards
    Attached Thumbnails Attached Thumbnails ce6ca177-a478-4141-a6b2-9e15e2fbd2af.jpg  

  2. #2
    Join Date
    Aug 2011
    Location
    Upstate of South Carolina
    Posts
    701

    Re: drying parameters for technomelt PA 638

    I looked the resin up and it says NOTHING about drying it!? It tells you to place it in an airtight container ASAP when opening the packaging.
    I did notice that this resin carries a FR rating. Perhaps you have the barrel set too hot or the residence time is too long?
    Rick

  3. #3
    Join Date
    Oct 2020
    Posts
    19

    Re: drying parameters for technomelt PA 638

    thank you for your feedback, i will check this.

  4. #4
    Join Date
    Jun 2014
    Location
    EU
    Posts
    123

    Re: drying parameters for technomelt PA 638

    Hi,
    Rick is probably right, this seems like process temperature setup in the IM - not drying.

  5. #5
    Join Date
    Dec 2012
    Location
    Serbia
    Posts
    104

    Re: drying parameters for technomelt PA 638

    Hi,

    On Technomelt 678 im using 30C for 4h, and that solved this problem for me. On datasheet is saying that drying is not required but without, surface of parts are like moon surface because of bubbles.

  6. #6
    Join Date
    Oct 2020
    Posts
    19

    Re: drying parameters for technomelt PA 638

    Nemanja Thank you for your feedback, I used the exact parameters you mentioned, then the problem was solved.

    Salutations.

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