Infusion Speed

Discussion in 'Fiberglass and Composite Boat Building' started by weldandglass, Aug 5, 2021.

  1. weldandglass
    Joined: May 2010
    Posts: 28
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: Gulf Coast of Texas

    weldandglass Junior Member

    I ran a test infusion panel last night.

    The infusion stack was:
    45/45 12 oz biax
    0/90 12 oz biax
    h80 1/2" divinycell (perforated)
    0/90 12 oz biax
    45/45 12 oz biax
    peel ply
    Green airtech flow media

    Resin was Proset INF 114/212 epoxy

    The panel was about 30" wide by 44" long and I infused it the long way with inlet on one 30" side and vacuum on the other 30" side. I infused the long way so I could get a feel for the flow rate and see if I could beat the resin gel time. The panel came out very nice looking, nice clear laminate on both sides, fully wet out except just a few fibers on the bottom look a tad dry. It doesn't look like the bottom laminate was resin starved, it looks like the PVA I had down on the infusion table may have interfered but I'm not entirely certain.

    The question is this: it took about 12 min for the resin to flow 44", which seems pretty fast relative to other infusions I've seen people do. The resin front traveled extremely quickly within the first minute but after that the rate of travel was about the same ( 3"/min or so).

    Is the rate of infusion too fast? Should I be trying to slow it down? If so, what's my best strategy? Thanks in advance.
     
  2. weldandglass
    Joined: May 2010
    Posts: 28
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: Gulf Coast of Texas

    weldandglass Junior Member

    Maybe I should attempt to simplify the question:

    Most infusion instructional I’ve watched have a 30-45min infusion time for a resin flow distance of any significant length. Is infusing 44” in 12 minutes too fast? Is the decent looking infusion that resulted a fluke?
     
  3. ondarvr
    Joined: Dec 2005
    Posts: 2,700
    Likes: 420, Points: 83, Legacy Rep: 506
    Location: Monroe WA

    ondarvr Senior Member

    There is no too fast or too slow, every slight change you make in the laminate schedule, core, flow media, feed line placement, exact resin, etc, will influence the speed and distance.

    Unless you have a great deal of experience the first part is mostly just a best effort situation. After that you fine tune the all the materials to achieve your goal.
     
    fallguy likes this.
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