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Multifunctional self-curled polycaprolactam-polyurethane eccentric skin core compound filament and preparation method thereof

A polycaprolactam and composite filament technology is applied in the field of spinning, which can solve the problems of high spinning failure rate, large difference in flow properties, and easy channeling of composites, and achieves the effects of super soft stretchability and improved elasticity.

Inactive Publication Date: 2019-02-15
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inventor found after research that the preparation technology of this product is relatively difficult, so it has been unable to realize industrialization. At present, there are few studies on this aspect. Only application number 200610117221.2 discloses polycaprolactam-polyurethane composite three-dimensional crimped fiber and its preparation method
However, the inventors have found in practice that because the flow properties of the two components are quite different, channeling is prone to occur during compounding, and spinning according to the method of the above-mentioned patent has a very high spinning failure rate, and the obtained The fiber properties are not ideal, so it is necessary to develop a new process to realize the large-scale practical mass production of polycaprolactam-polyurethane eccentric sheath-core composite filaments

Method used

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  • Multifunctional self-curled polycaprolactam-polyurethane eccentric skin core compound filament and preparation method thereof
  • Multifunctional self-curled polycaprolactam-polyurethane eccentric skin core compound filament and preparation method thereof
  • Multifunctional self-curled polycaprolactam-polyurethane eccentric skin core compound filament and preparation method thereof

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preparation example Construction

[0044] A method for preparing multifunctional self-crimping polycaprolactam-polyurethane eccentric sheath-core composite filaments, comprising the following steps: 1) Drying: drying polycaprolactam slices and polyurethane slices respectively, the drying temperature of polyurethane slices is 65-70°C, The drying time is 45-50min; the drying temperature of polycaprolactam is 115-125°C, and the drying time is 45-50min.

[0045] 2) UDY spinning: Polyurethane slices are melted and extruded by the screw, enter the auxiliary box, and then enter the main box after the distribution and metering of the polyurethane melt. In the main box, the polyurethane melt enters the eccentric skin-core composite component; The composite functional masterbatch is mixed in the caprolactam chips, melted and extruded by the screw, and enters the main box for distribution and metering of the polycaprolactam melt, and then enters the eccentric skin-core composite component, between the distribution plate an...

Embodiment l

[0052] A multifunctional self-crimping polycaprolactam-polyurethane eccentric sheath-core composite filament, the cortex is polycaprolactam containing composite functional masterbatch, and the core layer is polyurethane. The mass ratio of the skin layer to the core layer is 50:50.

[0053] Among them, the relative viscosity of the polycaprolactam is 3.3±0.020, the melting point is 221° C., and the water content of the dry slice is less than 140 ppm. The relative viscosity of the polyurethane is 1.37±0.020, the melting point is 180°C, and the water content of the dry chips is less than 60ppm. The composite functional masterbatch contains anti-ultraviolet component, antistatic component and antibacterial component, wherein the total component content is 25%, the water content of the masterbatch is less than 100ppm, and the addition amount of the composite functional masterbatch in the cortex is 2wt%.

[0054] A preparation method of multifunctional self-crimping polycaprolactam...

Embodiment 2

[0060] The difference between this embodiment and embodiment 1 is that the temperature of the spinning box is 265°C. The draw ratio is 2.5, the stretching temperature is 60°C, and the heat setting temperature is 80°C.

[0061] The specifications of the eccentric skin-core composite component used: the specification of the spinneret is 4 holes, the diameter of the spinneret hole d'=0.3mm; the diameter of the spinneret guide hole D'=3mm; the specification of the distribution plate: the height of the slit h= 0.28mm, eccentric angle θ=1.2°, diameter of circular boss D=6mm, diameter of core layer component pipeline d=lmm, depth of core layer component pipeline l=4mm.

[0062] The specification of the self-crimping composite filament prepared by the above process is 200dtex / 4f.

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Abstract

The invention relates to the field of spinning and discloses a multifunctional self-curled polycaprolactam-polyurethane eccentric skin core compound filament and a preparation method thereof. The polycaprolactam-polyurethane eccentric skin core compound filament is prepared by taking polycaprolactam which is relatively good in wear resistance and adding compound functional master batch as a skin layer and polyurethane with high elastic reversion rate as a core layer by compounding the eccentric skin core. The two high polymers are melted and extruded through a screw extruder, are gathered in aeccentric skin core compound spinneret plate which is designed specially, are extruded from a spinneret orifice, and are oiled, guided and wound to form a UDY filament; and after being balanced, theUDY filament is pulled and thermally set to wind the DY filament so as to finally prepare the multifunctional self-curled polycaprolactam-polyurethane eccentric skin core compound filament with antistatic, anti-ultraviolet and antibacterial compound functions. The product has high elasticity, high elastic reversion rate, relatively good wear resistance and air permeability, and is relatively highin additional value and relatively wide in application range.

Description

technical field [0001] The invention relates to the field of spinning, in particular to a multifunctional self-crimping polycaprolactam-polyurethane eccentric sheath-core composite filament and a preparation method thereof. Background technique [0002] Polycaprolactam is obtained by ring-opening polymerization of caprolactam, and polycaprolactam fibers can be prepared by melt spinning. Polycaprolactam fiber has excellent abrasion resistance, dyeing performance, high strength, soft hand feeling and lightness, but its elastic recovery rate is poor. It is mainly used to prepare high-grade elastic fabrics and stockings. [0003] Polyurethane is composed of diisocyanate, dihydroxy compound, chain extender and additives. It is a block copolymer containing 85% urethane segment repeating structural units. Polyurethane fibers can be prepared by solution spinning or melt spinning. Polyurethane fiber has excellent elasticity and elastic recovery rate, but low strength and poor wear r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/16D01F8/12D01F1/10D01F1/09D01D5/34D01D5/08
CPCD01D5/08D01D5/34D01F1/09D01F1/103D01F1/106D01F8/12D01F8/16
Inventor 林巧巧
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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