Why is thread tension important?
Why Tension Matters
The tension adjustment on your sewing machine controls how tight or loose the top thread is when you’re creating a lockstitch. If the thread is too loose or too tight, the small knots between stitches will be visible on the top or bottom of the seam.
Can you sew ripped polyester?
Over time, polyester, like all fabrics, will wear, tear or develop holes. … You can use an iron-on patch designed for polyester fabric repair or you can overlay a polyester patch to the back of your fabric and machine stitch the two fabrics together. Both types of repair will extend the life of the fabric.