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  1. #1
    Senior Member egrant5329's Avatar
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    Combine 2 pieces of synthetic insulation?

    I want to make my 7yo a top quilt 36" x60" and I have quite a bit of left over primaloft-1 and primaloft from various projects.
    The pieces are all roughly 25"x36".

    Question: How would you sew in 3 pieces of primaloft so they act like 1 continuous piece?

    -If I stitch each piece down to the ripstop, I'll have a cold line where the stitching compresses the synthetic insulation.

    -I could overlap each peice and quilt it, but I am not sure how well that would hold up with repeat stuffing.

    Thoughts?

    Thanks in advance,
    Ed
    Ed

  2. #2
    Detail Man's Avatar
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    Sounds like a shingled method of construction would be approriate. Given the size of primaloft you have, sew a piece of primaloft to another about 8" from the end (25"/3 = about 8"). Sew this assembly to a third piece again at 8". Keep doing this until you have enough length for the quilt. You'll end up with a triple layer of insulation 36" wide that once covered with the shell of the TQ should be very durable. Lapping the joints like this will eliminate cold spots. Depending on the loft you need, you can adjust the math and the overlap for more or fewer layers.

    Hope this helps.
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  3. #3
    Senior Member JohnSawyer's Avatar
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    That method looks comparatively heavy...

    random unproven Ideas:
    1. You could build compartments like in a down quilt, and stuff them with PL.
    2. just over lap the edges by an inch or two and loosely hand-sew it together.
    3. Get some lightweight polyester scrim (Pellon) Many are heat-fusable... the scrim will add strength, but stiffen it quite a bit.
    4. Lay edge-to-edge, cut a patch to cover the gap, and sew down both sides.

    I am wondering if you hand-sew large loops but only go 1/2 way through the insulation if it will hold while eliminating compression from the sewing.

    That's all I got...

    John
    "Do or do not, there is no try." -- Yoda


  4. #4
    Senior Member egrant5329's Avatar
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    I think I will over lap the joints 2 or 3" and use quilting loops to adhere them together. The primaloft has scrim on it and will probably be strong enough, especially after I put a few loops through the nylon.

    It is 5oz pl-1, so I don't want to completely shingle it.

    Thanks for the input guys!
    Ed
    Ed

  5. #5
    WV's Avatar
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    You can sew two pieces of primaloft together with a machine. If you join them 1/2" from the edges and open them out, there won't be a thin spot at the seam. In fact, it will be a bit thicker. Use a piece of the fine scrim that comes with the primaloft on top of the two layers to sew through. You can leave the Primaloft open on the bottom - it won't get caught on the feed dogs (but it would catch on the presser foot if you sewed it with the insulation facing up).

    Theoretically you should quilt it to the cover every 20" or so (I've also heard 12", but that may have been for garments), but I think you'd do okay just sewing it into the cover around the edges. Use fabric up and insulation down.

  6. #6
    Senior Member egrant5329's Avatar
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    WV,
    Thanks

    I have an UQ that I put the quilting loops in and it has held up really well so far.

    Ed
    Ed

  7. #7
    Senior Member egrant5329's Avatar
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    Well I thew this together last night and I think it turned out ok. It has cinch cords/cord locks at the foot and head, as well as hanging loops.

    It's made out of 1.1 camo ripstop and a brown of sorts. The insulation is 5 oz Primaloft-1.

    Compared to most kids synthetic sleeping bags which barely compress and often weigh 3+ lbs, it is really light at 16oz and packs down pretty small.

    It will fit much nicer in my 7yo pack and I can use it as a throw this winter.
    Ed


    ImageUploadedByTapatalk1343584738.996159.jpg
    Ed

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