Beam for weaving and sizing method

摘要

To provide a method for sizing polytrimethylene terephthalate fiber yarns and a warp beam improved in mutual stickiness of the yarns and excellent in weavability,The sizing method according to the present invention is characterized in that the yarns are dried while controlling a stretch ratio S (%) between a squeeze roll and a drying cylinder in a range from -9 to -3% or from -1 to +4%. From the sized yarns thus obtained, a warp beam is formed at a winding tension in a range from 0.09 to 0.22 cN/dtex to have hardness in a range from 65 to 90 degrees.