Patent ID: 7323244

Claim:
A low and weakly-interlaced industrial polyester multifilament yarn with relatively high strength, wherein an average number of interlaced portions is 0.4 to 4.0 number/m, a deviation of the interlaced portions is 75 or less, an average thickness is 45 to 81 μm, an average tear strength of the interlaced portions is 3 to 15 gf, and a number of peaks, at which the average tear strength of the interlaced portions is 3 gf or more, is 8 peaks or less/5000 mm, wherein lengths of openings of the yarn are 5000 mm or less, wherein a winding angle of a yarn supplied to a winding cake (θ 1 ) is 160° or less leading to an increase of a tension of the yarn, and an interval length in an interlacing device is 50 cm or less so as to shorten wave length of yarn vibrations leading to a reduction of interlace portions of the yarn whereby enabling the yarn to be low and weakly interlaced.