• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to 10 to 30% by weight of a salt consisting of 2-methylpentamethylenediamine and isophthalic acid in a polymer using 30 to 50% by weight of a mixed salt of ε-caprolactam 30 to 50% by weight of a mixed salt of adipic acid and hexamethylenediamine. Polyamide monofilament is prepared by adding 10 to 20% by weight of uractam to prepare a polyamide polymer and extruding it to obtain a polyamide monofilament having excellent rigidity and excellent transparency and flexibility even in a medium to high temperature region. .
    公开号:KR19980056773A
    申请号:KR1019960076043
    申请日:1996-12-30
    公开日:1998-09-25
    发明作者:박명수；이창황
    申请人:김인환；주식회사 효성티엔씨；
    IPC主号:
    专利说明:

    Manufacturing method of polyamide monofilament with excellent flexibility
    The present invention relates to a method for producing polyamide monofilament having excellent flexibility. More specifically, by adding a third material to the existing polyamide polymer and copolymerizing it, the rigidity is maintained well in the medium and high temperature ranges and the transparency and It is to provide a method for producing a polyamide monofilament with excellent flexibility.
    Polyamide monofilament (mono-filment) means a single thick coarse fiber, mainly used in fishing nets, brush bristles, badminton, gut of tennis rackets, etc. High nodule strength and good transparency are required.
    The polyamide monofilament for the above purpose was prepared by extrusion molten polyamide 3 to 4 times in the first step after extrusion quenching, heat drawing in two stages at high temperature and then heat setting, and transparency In order to improve the efficiency, the method of rapidly cooling the melt-extruded polyamide from the spinning nozzle to the cooling device was generally shortened to about 0.3 seconds. However, the polyamide monofilaments thus prepared have good transparency, but have insufficient defects in terms of flexibility compared to transparency.
    Accordingly, the present invention provides a method for producing a polyamide monofilament having excellent transparency and excellent flexibility even at a high draw ratio in order to solve the above problems, the polyamide used in the present invention is adipic acid and hexamethylene Copolymerization by adding a mixed salt consisting of diamine and an existing polymer consisting of ε-caprolactam, adding a third material, a salt consisting of 2-methylpentamethylenediamine and isophthalic acid, and a laulactam polymer to copolymerize them. The stiffness is maintained well at even and enables the production of polyamide monofilaments having excellent flexibility even in large diameter monofilaments.
    Hereinafter, the present invention will be described in detail.
    In the present invention, in order to ensure higher transparency and flexibility, 2-methylpenta is used in a polymer using ε-caprolactam as 30 to 50% by weight of the total raw material and 10 to 30% by weight of a mixed salt of adipic acid and hexamethylenediamine. 10 to 30% by weight of a salt consisting of methylene diamine and isophthalic acid, laulactam is characterized in that it is prepared by adding 10 to 20% by weight, more preferably 10% by weight. Wherein laulactam has a long chain of 12 carbon atoms to affect the amorphousness has the effect of maximizing flexibility, but the copolymer produced by adding only laulactam is expensive and shows the phenomenon of sticking together Eg solved this by adding 2-methylpentamethylene diamine and isophthalic acid. The polyamide copolymerized in this way may contain ordinary lubricants, dyes, colorants such as pigments, additives for improving weather resistance, and the like.
    The polyamide is usually supplied in the form of pellets, melted and extruded in a spinning nozzle having a pore size of 10 mm or more.
    In order to extrude the molten polyamide from a spinning nozzle with a pore diameter of 10 mm or more to obtain a monofilament having a diameter larger than 3.0 mm, in general, the shaking of the thread occurs, leading to instability and poor roundness, thus affecting physical properties. The polyamide copolymerized according to the present invention can uniformly flow the melt during extrusion to prevent the shaking of the yarn.
    Polyamide monofilament prepared as described above is preferably in the diameter of 2.0 to 4.0mm to satisfy the transparency and flexibility, there is an effect having a relatively excellent flexibility at the same thickness than the conventional monofilament.
    Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples.
    Example 1
    2880 g of ε-caprolactam, 1200 g of hexamethylenediamine diammonium adipate, 750 g of laulactam, 830 g of 2-methylpentamethylenediamine, and 1150 g of isophthalic acid are added together, and distilled water is added thereto to make a solution of 60 to 70%. do. The polymer was extruded from a nozzle with a diameter of 10 mm using a 50 mm extruder, held in air, quenched, then stretched, and prepared polyamide monofilament having a diameter of 3.5 mm with a pulling speed of 20 m / min. Is shown in Table 1. The relative viscosity of this copolymer is 3.12.
    Example 2
    2255 g of epsilon caprolactam, 1100 g of hexamethylenediamine diammonium adipate, 920 g of laulactam, 700) g of 2-methylpentamethylenediamine and 1002 g of isophthalic acid are added together. Distilled water is added here to make a solution of 60 to 70% and then polymerized. The polymerization and monofilament manufacturing methods were carried out in the same manner as in Example 1, and the results are shown in Table 1. The relative viscosity of this copolymer is 3.12.
    Comparative Example 1
    2100 g of epsilon caprolactam, 980 g of hexamethylenediamine aqueous solution, and 752 g of adipic acid and 980 g of distilled water were added to a reactor and reacted at 260 ° C. The relative viscosity of the copolymer thus obtained is about 3.2. The polymerization and monofilament production methods were carried out in the same manner as in Example 1, and the results are shown in Table 1.
    [Property evaluation method]
    (1) Nodule strength and linear strength indicate values measured according to JlSL 1070.
    (2) Flexibility refers to the measurement of 5cm length of monofilament yarn with a flexible measuring instrument. The smaller the size, the more flexible.
    (3) Evaluation of transparency evaluated each polyamide extruded by the above-mentioned method into a monofilament, and evaluated it by the abdomen according to the diameter.
    权利要求:
    Claims (1)
    [1" claim-type="Currently amended] In preparing a polyamide monofilament, a salt consisting of 2-methylpentamethylenediamine and isophthalic acid in a mixture using 30 to 50% by weight of ε-caprolactam and 10 to 30% by weight of a mixed salt of adipic acid and hexamethylenediamine A method for producing a flexible polyamide monofilament having excellent flexibility, characterized in that the polyamide polymer is prepared by adding 10 to 30 wt% and 10 to 20 wt% of laulactam.
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    同族专利:
    公开号 | 公开日
    KR100328147B1|2002-11-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1996-12-30|Application filed by 김인환, 주식회사 효성티엔씨
    1996-12-30|Priority to KR1019960076043A
    1998-09-25|Publication of KR19980056773A
    2002-11-07|Application granted
    2002-11-07|Publication of KR100328147B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019960076043A|KR100328147B1|1996-12-30|1996-12-30|Manufacturing method of polyamide mono-filament having excellent flexibility|
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