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Preparation method of polyester-nylon parallel composite elastic fiber

A composite elastic fiber and polyester-nylon technology, which is applied in the field of preparation of polyester-nylon side-by-side composite elastic fibers, can solve the problems of poor compatibility between polyester and nylon, and easy fiber opening of side-by-side composite fibers, so as to hinder heat conduction, promote char formation, Avoid the effect of fiber opening

Active Publication Date: 2020-01-03
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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Problems solved by technology

[0005] Aiming at the problems of poor compatibility between polyester and nylon and easy fiber splitting of side-by-side composite fibers, the present invention provides a method for preparing polyester-nylon side-by-side composite elastic fibers. The method uses PET slices and nylon 6 slices as two components. Then a specially designed skin-core composite spinneret is used to obtain polyester-nylon side-by-side composite elastic fibers

Method used

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  • Preparation method of polyester-nylon parallel composite elastic fiber
  • Preparation method of polyester-nylon parallel composite elastic fiber
  • Preparation method of polyester-nylon parallel composite elastic fiber

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preparation example Construction

[0033] General embodiment A kind of preparation method of polyamide juxtaposed composite elastic fiber (fiber specification is 100dtex / 36~48f), comprises the following steps:

[0034] 1) According to the mass ratio of 25:75-45:55, PET chips and nylon 6 chips are dried separately and then melted by a screw extruder (260-285° C.), to obtain PET spinning melt and nylon 6 spinning melt.

[0035] 2) The two spinning melts enter the two-component composite spinning assembly through their corresponding pipes for spinning (the temperature of the spinning box is 260-285°C), and the two spinning melts are spun from the sheath-core composite spinning The sheets are extruded to form filaments.

[0036] 3) After the filaments are cooled, oiled, stretched and shaped (the temperature of the first hot roller is 75-95°C, the temperature of the second hot roller is 130-150°C; the draw ratio is 3.0-4.0) and winding, the obtained Polyester-nylon side-by-side composite elastic fiber; two componen...

Embodiment 1

[0043] Raw material composition: PET chip (intrinsic viscosity 0.65±0.2dL / g, melting point 260~265℃)

[0044] PA6 chips (relative viscosity 2.47±0.2, melting point 215~225℃)

[0045] Dry polyester (PET) slices and nylon 6 (PA6) slices separately. The drying temperature of the polyester chips is 130°C, and the drying time is 20 hours. After drying, the water content of the polyester chips is less than 50ppm. The drying temperature of the nylon 6 chips is 95°C, the drying time is 24 hours, and the water content of the nylon 6 chips after drying treatment is less than 100ppm.

[0046] The dried polyester chips and nylon chips are sent to the twin-screw extruder according to the set compounding ratio (40:60) to be melted and extruded. The melt pipe enters the composite spinning group by the spinneret (such as figure 1 (shown) is sprayed out, then cooled by side blowing, oiled, coiled, the first hot roll, the second hot roll, and FDY coiled to form a finished product.

[0047] ...

Embodiment 2

[0050] The setting and working principle of this embodiment are the same as that of Embodiment 1, the difference is that:

[0051] Among them, PET is used as component A, and the temperature of each zone of the screw is 260-285°C; PA6 is used as component B, the temperature of each zone of the screw is 260-270°C, the temperature of the spinning box is 275°C, and the wind speed of side blowing is 0.7m / s; The wire speed is 1200m / min, the temperature is 75°C; the temperature of the second hot roller is 150°C, and the draw ratio is 3.0.

[0052] The specification of the self-crimping composite filament prepared by the above process is 100dtex / 24f.

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Abstract

The invention relates to the field of chemical fibers and discloses a preparation method of a polyester-nylon parallel composite elastic fiber, wherein PET (polyethylene terephthalate) and nylon 6 aretaken as two parallel components, then the PET and nylon 6 are respectively subjected to melt extrusion through a screw extruder, the melts enter a two-component composite spinning assembly and a skin-core composite spinneret plate with a special design, and the sprayed melt is cooled, the cooled melt is oiled, and the oiled material is stretched and shaped and wound to obtain the polyester-nylonparallel composite elastic fiber, having the advantages of moisture absorption, air permeability, pilling resistance, bulkiness, high elasticity, fabric stiffness and the like. Compared with the current polyester-nylon composite fibers, the polyester-nylon composite fiber has better elasticity, and higher added value, and the problem of fiber opening of parallel polyester-nylon composite fibers is solved.

Description

technical field [0001] The invention relates to the field of chemical fibers, in particular to a preparation method of polyester-nylon side-by-side composite elastic fibers. Background technique [0002] The elastic fiber is stretched to twice its original length at room temperature, and finally returns to its original length after releasing the tension. Elastic fibers can be divided into two categories from the elastic mechanism, one is intrinsic elastic fibers, which are made of polymers linked by soft segments and hard segments, such as polyurethane (PU) fibers, polyethylene terephthalic acid Propylene glycol ester (PTT) fiber; the other type is elastic fiber produced by shape, including subsequent processing and crimped structural fiber due to its own characteristics, also known as self-crimping fiber, such as PTT / PET (T400) fiber, PBT / PET fiber . Unlike the tight and restrained feeling provided by PU fiber, the elasticity provided by this type of fiber provides a comf...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01F8/12D01F1/07D01D5/32D01D5/253D01D5/08D01D5/16
CPCD01D5/08D01D5/16D01D5/253D01D5/32D01F1/07D01F8/12D01F8/14
Inventor 李皓岩林巧巧王军奇方哲城
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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