Re-usable tube for winding fiberglass yarn

A winding tube for glass fiber yarn comprising

• an inner cylinder and an outer covering on the inner cylinder,
• the inner cylinder being made of a composite having at least two sheets of polypropylene film bonded together, with each sheet having a plurality of parallel fiberglass filaments embedded within the film of that sheet, and with the filaments of one sheet being at 90 degrees with the filaments of the other sheet,
• the outer covering being a polyester fabric having a spiral stitching of thread, so glass fiber yarn can be wound on the fabric covering of the winding tube to make a yarn package,
• the winding tube having sufficient resilience to maintain a cylindrical shape and sufficient flexibility that after a desired amount of glass fiber yarn is wound on the winding tube to make a yarn package, the winding tube can be radially collapsed sufficiently to permit the winding tube to be withdrawn from within the yarn package,
• wherein the winding tube is dimensionally stable in length and width with a thermal expansion of 0.000015 inches/inch/degree Fahrenheit or less.