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METHOD AND DEVICE FOR MANUFACTURE OF LOW SHRINKING THREAD OF ALIPHATIC POLYAMIDE AND LOW SHRINKING THREAD
METHOD AND DEVICE FOR MANUFACTURE OF LOW SHRINKING THREAD OF ALIPHATIC POLYAMIDE AND LOW SHRINKING THREAD
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机译:制造脂族聚酰胺的低收缩率和低收缩率的方法和装置
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摘要
FIELD: manufacturing technology.;SUBSTANCE: present invention relates to a method and apparatus for the production of a small shrinkable yarn from an aliphatic polyamide. Method for the production of a low-shrinkable yarn from an aliphatic polyamide, wherein the aliphatic polyamide contains at least 90 % by weight of monomer units, obtained from caprolactam, according to which polyamide is extruded through a die to form elementary fibers, which are then cooled and combined to form at least one strand, at least one thread is subjected to stretching between the spinneret and a pair of input rolls, then at an additional stage of multi-stage stretching is subjected to 4–6-fold stretching in pairs of exhaust rolls, a pair of exhaust rolls sequentially heat the thread, and at least the last pair of exhaust rollers has a temperature of 5–20 °C below the melting point of the thread, relax the thread by 4–10 % in the subsequent, at least three-step relaxation zone and hold in the temperature range 5–15 °C below the melting point of the thread, and then wound on the device for rewinding.;EFFECT: present invention further relates to a yarn consisting of a low shrinking fiber of an aliphatic polyamide.;22 cl, 1 dwg
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