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| | |-+  welt cord that doesn't shrink for outdoor sunbrella cushions.
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: welt cord that doesn't shrink for outdoor sunbrella cushions.  ( 2439 )
gordon
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« : June 05, 2012, 09:31:51 PM »

looking for welt cord other than the rubber type with flange for outdoor use.  Tried some propolene rope slightly thicker than the usual 5/32", which meant I had to use a zipper foot instead of my usual cording foot  Hasn't gotton wet yet so don't know how it will work.  Has anyone tried something else.  Hate puckered cushions.
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« #1 : June 05, 2012, 09:41:38 PM »

Sounds like you need foam core welting.   Comes on huge rolls of a gazillion yards from wholesalers.  I have a roll that will see me to my grave. 

http://www.ebay.com/itm/Welt-Cord-5-32-Foam-Core-25-yards-/190675927917

It won't shrink and won't absorb water.   Oh, and welcome  ;D

June

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gene
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« #2 : June 05, 2012, 10:34:36 PM »

June, is this the stuff that is very stiff and rigid? Like plastic? Or is it very soft and pliable?

Thanks,

gene

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Grebo
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« #3 : June 06, 2012, 03:55:59 AM »

I use black pvc for external work, does not  seem to shrink ( so far )  ::)
http://www.ruperez-nautica.com/files/pdf/SueltasCatalogo2012/Pag.%2055.pdf
It's almost rubbery gets stiff in the cold so needs warming up in the winter, don't we all  :P

Suzi

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« #4 : June 06, 2012, 09:26:31 AM »

I've never seen it in black, Suzi.  Yes, Gene, it's quite stiff.  A bit much for light weight fabrics, but for marine vinyl and heavier wovens it's much easier to work with because you can actually feel it through the folded-over fabric.  Where it crosses at intersections I usually take a blade and "skiv" the stuff down to next-to-nothing to avoid bumps. 

June

"Horse sense is the thing a horse has which keeps it from betting on people."

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sofadoc
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All types of upholstery.....except cars and boats.


« #5 : June 06, 2012, 10:50:39 AM »

The black stuff that Suzi linked looks like pure vinyl cord, not the foam type that June linked.
Either one shouldn't have a shrinking problem.
The only problem that I've seen with fiber (tissue) welt on outdoor cushions is that it simply disintegrates over time. Haven't really noticed shrinkage.
Foam welt can be cantankerous when turning corners, especially when using light to mid-weight fabrics. Not so much of a problem with vinyl.

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gene
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« #6 : June 06, 2012, 07:07:11 PM »

Sailrite has a video where they are using this very stiff plastic cording to make welt cord. They put it in a pot of boiling water before they use it. This makes it less stiff.

I'm wondering if anyone does this on a regular basis?

gene

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Mike
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« #7 : June 06, 2012, 07:33:15 PM »

I just had to order a new roll of welt june i dont know how many tards it it but inthink its my 3rd roll that i can think of.

bobbin
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« #8 : June 09, 2012, 05:29:44 AM »

I use only polyester or the foam welt now.  For rugged marine cushions (vinyl or those used in cockpits) I use the foam welt.  But I've found that (as Gene pointed out) it's often too stiff for use with lighter weight fabrics.  For lighter goods I use the medium welt cord (polypro. filler) from Rowley and I really like it.  There are also some excellent pre-made vinyl welts available in a variety of colors to match bolt goods.  They are created over the foam welting with the appropriate vinyls. 

With the foam welt I find that deliberately flexing it back and forthe before turning the corner makes it more workable, but it is squirrel-y to handle on corners, esp. those that are acute and it is difficult to use with lighterweight goods, esp. upholstery fabrics on a knitted backing.  I find the md. welt cord tends to open when the outer netting that encases it is cut, so I give it a quick "flick of the bic" to cauterize it  and that's worked well for me.  It is the best match for the knit back upholstery fabrics as it is pliable, soft and tends to lie flat when applied to the top/bottom pieces.

In the past I've tried cotten welt (sucked) and even have used polyester cord (expensive) but that was before I had established accounts with good suppliers. 
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