Katzzz wrote:
I was once told that the polyester tears quilts over a period of time when washed, and if you sew to tiny of stitches by machine the same will happen over a period of time.
I've also heard this was a myth on polyester thread because back in the day cotton thread was the only resource to be used.
Katzzz, it's not a myth. It happened to me.
The first quilt I made (in the early 1990s) was a lap quilt that I put through the washer and dryer a lot. (I was a newbie--what did I know about washing quilts?) After about ten years the polyester thread sawed through many of the seams, and the patches fell off.
Now I use Aurifil 50-weight thread for piecing. It's nice and strong, and leaves very little lint in my sewing machine.
If I have to replace something in a few years, I'd sooner it was the thread than the fabric! It's never happened to me, though, since I switched from poly to cotton.
Anne in Vancouver, Canada