The warp is the lengthwise yarns which are arranged in right angles next to each other
Yarn is a long continuous length of interlocked fibers that can be used to make textiles, sew, crochet, knit, weave, embroider, or rope. It is available in a variety of colors and thicknesses and can be made of a variety of natural or synthetic materials.
Acrylic yarn is, indeed, flammable. Acrylonitrile, a colorless flammable liquid derived from polypropylene plastic, is used to make acrylic. The fabric melts when ignited. This produces a plastic-like sticky substance that can cause severe burns.
Yarns are classified as single or one-ply, ply, plied, or folded, or cord, which includes cable and hawser types.
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