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Forum > Fabrics and more... > Rayon jersey separated ( Moderated by CynthiaSue)

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Rayon jersey separated
RobA.
RobA.  Friend of PR
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Date: 10/17/13 4:13 PM

I sewed a cowl-neck top using rayon jersey. I used a "wobbly stitch", i.e., a slight zigzag and polyester thread. It looked fine, and I wore it a few times. When I went to put it on last time, I thought the underarm seam had opened. But the seam is still there, sewed close, and the fabric of the sleeve had simply separated from the seam! The edge was so smooth you could believe it had been cut with a rotary blade. Any ideas on why that would have happened?

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Rob

Janie Viers
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Date: 10/17/13 4:39 PM

The thread was stronger than the fabric? Did you use a cotton thread or one with no give? I have had that happen to items sewn with the wrong thread.

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JanieV

simplystitches
simplystitches
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Date: 10/17/13 4:49 PM

Possibly the wrong type of needle.

If it was the wrong needle check other seams for small holes. That's a dead give away.

Debbie

beauturbo
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In reply to RobA. <<
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Date: 10/17/13 4:56 PM

They call that kind of thing, seam grin. It's still seam grin, even if it is not cut and smooth and more just pulling apart in fiber too. I see it like that more often on fabrics though.

Sometimes it just is really something not that great, or easy to sew, about your fabric and not much you can do about it. Or even fabric that has an issue, made badly or beginning to rot out. But also just happens on tightly worn things, especially if the thread is a lot stronger than your fabric and you got pulling forces on it. Something has to give, and the weaker thing, is just what gives.

If it's a knit, maybe you really cut most of those knit fibers when you sewed into it, and it just took that long for them to separate? Or fabric could be just too weak for the kind of seams, needles and thread used. Also if you know something is prone to that, then you need to make sure less stitches in it, further apart and not more of them often.

If wanting to patch it up just right there, and worried about that happening again, I think if you just fold it over a bit where that happened and even then just take a hand needle and thread and slip stitch it down,loosely not tight, it will probably be fine and not noticeable and less stress on it there and maybe hold.

That kind of seam grin, I do get occasional on clothes sometimes from the stores, not so much on stuff I sew though. You even see it in the dressing rooms, of lots of clothes tried on by a lot of people sometimes. As already starting to happen there even sometimes. But when it happens on something store bought, unless I'm or anyone is just wearing it too tight, then I feel that they in the factory did not do enough testing on how they made that garment and the choices on it, or even the fabric I think most times.
-- Edited on 10/17/13 5:06 PM --

goodworks1
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Date: 10/20/13 9:43 PM

I've had this happen with some knits that I think must have been processed incorrectly at the factory. Maybe too much heat? Or something wrong with the dyes? The reason I suspect that in my case is that other identical knits from the same factory were fine (but a different color)

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Doris W. in TN
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In reply to RobA. <<


Date: 10/30/13 1:16 PM

What type needle did you use when you sewed the seam? A sharp point type needle will cut the thread/yarn used to create the fabric, thus creating perforations and tear or cause a run in the fabric, depending on the knit.
A "stretch" needle will push them aside.
-- Edited on 10/30/13 1:17 PM --

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