CN116623335A - Preparation method of regenerated chinlon floating white air-coated yarn - Google Patents

Preparation method of regenerated chinlon floating white air-coated yarn Download PDF

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Publication number
CN116623335A
CN116623335A CN202310540288.0A CN202310540288A CN116623335A CN 116623335 A CN116623335 A CN 116623335A CN 202310540288 A CN202310540288 A CN 202310540288A CN 116623335 A CN116623335 A CN 116623335A
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CN
China
Prior art keywords
regenerated
nylon poy
nylon
roller
filaments
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CN202310540288.0A
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Chinese (zh)
Inventor
刘劲松
张岚岚
傅剑琼
黄修良
李建朋
黄洁
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Zhejiang Yate New Material Co ltd
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Zhejiang Yate New Material Co ltd
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Priority to CN202310540288.0A priority Critical patent/CN116623335A/en
Publication of CN116623335A publication Critical patent/CN116623335A/en
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/38—Threads in which fibres, filaments, or yarns are wound with other yarns or filaments, e.g. wrap yarns, i.e. strands of filaments or staple fibres are wrapped by a helically wound binder yarn
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/90—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
    • D02G1/022—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting while simultaneously drawing the yarn
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/04—Blended or other yarns or threads containing components made from different materials
    • D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
    • D02G3/328—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic containing elastane
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/10—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyurethanes
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/06—Load-responsive characteristics
    • D10B2401/061—Load-responsive characteristics elastic
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/14—Dyeability
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/20—Physical properties optical

Abstract

The invention relates to the technical field of air-coated yarns, in particular to a preparation method of a regenerated nylon float white air-coated yarn. The method specifically comprises the following steps: preparing regenerated nylon POY filaments by adopting a regenerated environment-friendly slice raw material for spinning; the prepared regenerated nylon POY filaments are regularly subjected to different stretching treatments on an empty package integrated machine, so that the regenerated nylon POY filaments are on the same filament and have multiple sections of different crystals; and spandex are prepared in an empty bag integrated machine to obtain the regenerated nylon floating white air-coated yarn. The regenerated environment-friendly slice is adopted as the raw material, and the manufactured nylon ammonia air coated yarn not only can meet the requirements of weaving and clothing, but also can protect the environment and prevent over exploitation of fossil resources on earth; the texturing machine is modified to break through the dyeing of different sections of single yarn, so that the cloth woven in the subsequent step has the effect of double-color float white.

Description

Preparation method of regenerated chinlon floating white air-coated yarn
Technical Field
The invention relates to the technical field of air-coated yarns, in particular to a preparation method of a regenerated nylon float white air-coated yarn.
Background
Based on the continuous enhancement of the demand of consumers for environmental protection products, the regenerated nylon fiber is further developed. As one of the regenerated fibers, the regenerated nylon coated yarn product is relatively single in category, most of the products are concentrated on the production of conventional varieties, and the level of the product is far less than that of a domestic terylene factory. The nylon has better hydrophilicity, wear resistance and dyeing fastness than terylene, and is more suitable for being used on underwear materials of human bodies. In order to expand the variety of products, a product with a double color representation is an important development direction.
At present, in order to realize the double-color function, two different raw materials of terylene and chinlon are usually adopted for carrying out. Specifically, two raw materials with different properties are utilized to obtain a double-color effect after dyeing through false twist deformation. The biggest drawbacks of this technique are: (1) Because the bicolor yarn can be spun with poor performance and the cost is higher than that of the conventional POY, the bicolor yarn has no environmental protection property; (2) Two raw materials are combined to realize double colors, basically filaments, and the fineness and elasticity of the product are limited; (3) The limited elasticity is unfavorable for the reduction of the subsequent production cost and the product development. Based on the defects, in order to meet market demands, reduce production cost, increase profit growth points, improve product competitiveness and economic benefit, and develop a brand new preparation method of the regenerated nylon float white air coated yarn capable of realizing a double-color function.
In the process of developing and designing the bicolor yarn, the spinnability and the bicolor performance have corresponding defects, particularly when the regenerated nylon material is adopted, the bicolor contrast effect is not obvious, the color difference is not large, and the bicolor performance capability is insufficient.
Disclosure of Invention
The invention aims to solve the problems of the prior two-color fabric, namely terylene and chinlon, and provides a preparation method of a regenerated chinlon floating white air-coated yarn.
Specifically, the invention adopts the following technical scheme:
the preparation method of the regenerated chinlon floating white air-coated yarn comprises the following steps:
(1) Preparing regenerated nylon POY filaments by adopting a regenerated environment-friendly slice raw material for spinning; the method specifically comprises the following steps:
spinning: fully and uniformly melting slice raw materials by using a German Bama lattice screw extruder, wherein the temperature of each section of the screw extruder is set between 255 ℃ and 280 ℃, and the screw pressure is 115-125 kg/cm 2 The rotating speed of the screw is 40-45 r/min, and the melt spinning temperature is 255-268 ℃;
and (5) cooling by side blowing: the wind temperature is 20-28 ℃, the humidity is 90-95%, and the wind speed is 0.5-0.55m/s;
oiling and bundling: the fiber cooled by the lateral blowing is oiled and bundled by an oil nozzle; the used oiling agent is 8% nylon oiling agent pure water emulsion;
winding: the oiling filament bundles are wound through a pre-network device, a filament guiding disc and a main network device, the winding speed is 4100-4200m/min, and the regenerated nylon POY filament with stable quality is obtained;
(2) The prepared regenerated nylon POY filaments are regularly subjected to different stretching treatments on an empty package integrated machine, so that the regenerated nylon POY filaments are on the same filament and have multiple sections of different crystals; the specific parameters of the spandex in-blank integrated machine are as follows:
the speed of the machine is 600 m/min, the drawing multiple DR of the regenerated nylon POY filament is 1.22-1.35, the ratio DY of the rotating speed of the false twister to the running speed of the nylon POY filament is 1.6-1.65, the temperature of the hot box when the nylon POY filament passes through the hot box is 175-180 ℃, the false twister is 1-5-1, the spandex drawing ratio is 3.5, and the network pressure is 4.3.
Preferably, the regenerated environment-friendly slice raw material is prepared from a modified mixed material, and the modified mixed material comprises a regenerated polyamide base material and a modified master batch; 91-98% of regenerated polyamide base material and 2-9% of modified master batch; the regenerated polyamide base material is prepared from recycled polyamide, and the modified master batch comprises the following components in parts by weight: 50 parts of polyamide-based particles, 5-10 parts of bismuth nitrate, 1-3 parts of yttrium oxide, 5-8 parts of nano titanium dioxide and 2-5 parts of other auxiliary agents.
Because the variety has higher requirements on fiber raw materials, the spinnability of the regenerated nylon needs to be studied when the variety is spun: in order to cooperate with the production of the regenerated floating Bai Jinan coated yarn, the production raw materials of the POY are re-selected as the regenerated environmental protection slices, so that the raw materials of the regenerated environmental protection slices are improved according to the characteristics of the regenerated environmental protection slices. Meanwhile, the proportion of the regenerated environment-friendly slice needs to be correspondingly adjusted based on the whitening performance function of the regenerated environment-friendly slice.
On the other hand, adjustments to the specific process are also required.
The modified master batch used as described above is intended to improve the spinnability of the recycled polyamide, and to further improve the differentiation of the float by adding bismuth nitrate and yttrium oxide to improve the crystal sensitivity of the recycled nylon POY. Bismuth nitrate can not only have a certain photo-catalytic effect under the action of light, but also improve the crystallization state of filaments, thereby improving the color performance of the fabric. The yttrium oxide can improve the dyeing property of the section crystallized filaments, that is, the yttrium oxide can improve the adsorption sensitivity of different crystallinity to the coloring agent, so that the fuel absorption difference can be enlarged, the color difference is improved, and the appearance of the float white is more obvious.
Preferably, the regular different stretching of the empty bag integrated machine is realized in the following manner:
a groove roller for adjusting the regenerated nylon POY filament is arranged on the blank all-in-one machine, and a shifting fork device for attaching and detaching the regenerated nylon POY filament and the groove roller is arranged in a matched mode, so that the attaching and detaching of the regenerated nylon POY filament and the groove position of the groove roller are achieved through the shifting fork device at a certain reciprocating swing frequency.
Preferably, a half of the circumference of the grooved roller is set as a reserved area and a half of the circumference of the roller is set as a grooved area, and the grooved area is provided with a plurality of groove notches at intervals along the circumference of the roller;
the shifting fork device shifts the regenerated nylon POY filaments to be positioned in the groove area of the groove roller, part of the regenerated nylon POY filaments are attached to the peripheral side surface of the groove roller, and part of the regenerated nylon POY filaments are positioned at the groove notch so as to be separated from the peripheral side surface of the groove roller; thereby forming intermittent lamination of the regenerated nylon POY filaments and the roller;
the shifting fork device shifts the regenerated nylon POY filaments to be positioned in the reserved area of the grooved roller, and the nylon POY filaments are attached to the peripheral side surface of the grooved roller.
The regenerated nylon POY swings through a shifting fork device, so that the silk enters a groove area of a groove roller when the silk is not drawn or drawn less, oversized drawing is generated on the surface of a non-groove retaining area, and the same regenerated nylon POY forms large difference change of drawing ratio when the silk passes through the groove and does not pass through the groove. When the yarn is drawn in super-high degree, the crystallinity and molecular weight are high, and after the yarn is dyed, the dye is less absorbed due to the larger crystallinity and molecular weight, so that the whitening effect is formed.
Preferably, the fork device swings back and forth 10 times/min for the regenerated nylon POY filament.
Preferably, the screw extruder adopts a multi-section temperature setting, specifically adopts a five-section heating method, the inlet to the outlet are sequentially divided into five sections, and the length proportion of the five sections is sequentially as follows: 1:2:2:3:1, and the temperatures of all the sections are as follows in sequence: first zone 255-260 ℃, second zone 265-270 ℃, third zone 275-280 ℃, fourth zone 265-270 ℃, and fifth zone 260-270 ℃.
Preferably, the oil application rate is 2-2.5%.
The invention uses the shifting fork device, the principle is that the nylon POY swings back and forth through the shifting fork device in the process of elasticizing and drafting, so that the nylon POY enters the grooved roller when the yarn is not drafted, and ultra-large drafting is generated on the surface without grooves when the yarn is not drafted, and the shifting fork device controls the amplitude and the frequency of the swing through the PLC. Thus, the same nylon POY forms a large variation of the draft ratio when passing through the groove and when not passing through the groove. When the yarn is drawn in super-high degree, the crystallinity and molecular weight are high, and after the yarn is dyed, the dye is less absorbed due to the larger crystallinity and molecular weight, so that the whitening effect is formed.
The beneficial effects of the invention are as follows:
the regenerated environment-friendly slice is adopted as the raw material, and the manufactured nylon ammonia air coated yarn not only can meet the weaving and clothing requirements, but also can protect the environment and prevent the excessive exploitation of fossil resources on earth;
the texturing machine is modified to break through the dyeing different sections of single yarn, so that the cloth woven in the subsequent step has the effect of double-color float white;
the prepared regenerated floating white cladding yarn can be fed into a circular knitting machine for weft knitting at one time, and the product solves the problem that spandex needs to be added to the circular knitting machine double-color elastic fabric independently;
the prepared regenerated floating white cladding yarn is developed successfully, so that the consumer and the subsequent clothing factories have more choices for environment-friendly different-color products, and the market share of regenerated environment-friendly fibers is improved.
Detailed Description
The representative embodiment shown will now be further refined. It should be understood that the following description is not intended to limit the embodiments to one preferred embodiment. On the contrary, it is intended to cover alternatives, modifications, and equivalents as may be included within the spirit and scope of the embodiments as defined by the appended claims.
In the following detailed description. While these embodiments are described in sufficient detail to enable those skilled in the art to practice the embodiments, it is to be understood that these examples are not limiting, so that other examples may be used and that corresponding modifications may be made without departing from the spirit and scope of the embodiments.
Example 1:
the preparation method of the regenerated chinlon floating white air-coated yarn comprises the following steps:
(1) Preparing regenerated nylon POY filaments by adopting a regenerated environment-friendly slice raw material for spinning;
the regenerated environment-friendly slice raw material is prepared from a modified mixed material, wherein the modified mixed material comprises a regenerated polyamide base material and a modified master batch; the percentage of the regenerated polyamide base material is 91 percent, and the modified master batch is 9 percent; the regenerated polyamide base material is prepared from recycled polyamide, and the modified master batch comprises the following components in parts by weight: 50 parts of polyamide-based particles, 10 parts of bismuth nitrate, 3 parts of yttrium oxide, 8 parts of nano titanium dioxide and 5 parts of other auxiliary agents;
the preparation process of the regenerated nylon POY filament specifically comprises the following steps:
spinning: fully and uniformly melting slice raw materials by using a German Bama lattice screw extruder, wherein the temperature of each section of the screw extruder is set between 255 ℃ and 280 ℃, and the screw pressure is 115-125 kg/cm 2 The rotating speed of the screw is 40-45 r/min, and the melt spinning temperature is 255-268 ℃; the screw extruder adopts multistage temperature setting, specifically adopts five sections heating methods, and the entry is divided into five sections to the export in proper order, and the length proportion of five sections is in proper order: 1:2:2:3:1, and the temperatures of all the sections are as follows in sequence: first zone 255-260 ℃, second zone 265-270 ℃, third zone 275-280 ℃, fourth zone 265-270 ℃, and fifth zone 260-270 ℃.
And (5) cooling by side blowing: the wind temperature is 20-25 ℃, the humidity is 90-92%, and the wind speed is 0.5-0.55m/s;
oiling and bundling: the fiber cooled by the lateral blowing is oiled and bundled by an oil nozzle; the used oiling agent is 8% nylon oiling agent pure water emulsion;
winding: the oiling filament bundles pass through a pre-networking device, a filament guiding disc and a main networking device until being coiled, wherein the coiling speed is 4100-4200m/min, and the regenerated nylon POY filament with stable quality is obtained, and the specification is 93dtex/48f; the oil application rate is 2%;
(2) The prepared regenerated nylon POY filaments with the specification of 93dtex/48f and 40D spandex are utilized to regularly carry out different stretching treatments on an empty bag integrated machine, so that the regenerated nylon POY filaments have multiple sections of different crystals on the same filament; the specific parameters of the empty bag integrated machine are as follows: the speed of the machine is 600 m/min, the drawing multiple DR of the regenerated nylon POY filament is 1.22-1.35, the ratio DY of the rotating speed of the false twister to the running speed of the nylon POY filament is 1.6-1.65, the temperature of the hot box when the nylon POY filament passes through the hot box is 175-180 ℃, the false twister is 1-5-1, the spandex drawing ratio is 3.5, and the network pressure is 4.3.
The regular different stretching of possession on the empty ladle integrated machine is realized by adopting the following modes:
a grooved roller for adjusting the regenerated nylon POY filaments is arranged on the blank all-in-one machine, and a shifting fork device for attaching and detaching the regenerated nylon POY filaments to and from the grooved roller is arranged in a matched mode, so that the attaching and detaching of the regenerated nylon POY filaments to and from the grooved position of the grooved roller are realized through the shifting fork device at a reciprocating swinging frequency of 10 times/min;
the groove roller is provided with a retaining area and a groove area along the peripheral side surface of the roller at intervals;
the shifting fork device shifts the regenerated nylon POY filaments to be positioned in the groove area of the groove roller, part of the regenerated nylon POY filaments are attached to the peripheral side surface of the groove roller, and part of the regenerated nylon POY filaments are positioned at the groove notch so as to be separated from the peripheral side surface of the groove roller; thereby forming intermittent lamination of the regenerated nylon POY filaments and the roller;
the shifting fork device shifts the regenerated nylon POY filaments to be positioned in the reserved area of the grooved roller, and the nylon POY filaments are attached to the peripheral side surface of the grooved roller.
Example 2: based on the embodiment 1, the regenerated environment-friendly slice raw material is prepared from a modified mixed material, wherein the modified mixed material comprises a regenerated polyamide base material and a modified master batch; the percentage of the regenerated polyamide base material is 98 percent, and the modified master batch is 2 percent; the regenerated polyamide base material is prepared from recycled polyamide, and the modified master batch comprises the following components in parts by weight: 50 parts of polyamide-based particles, 5 parts of bismuth nitrate, 1 part of yttrium oxide, 5 parts of nano titanium dioxide and 2 parts of other auxiliary agents.
The above embodiments are implemented based on the technical solution of the present invention. Specifically, the regenerated environment-friendly slice is adopted as the raw material, and the manufactured nylon ammonia air-coated yarn not only can meet the weaving and clothing requirements, but also can protect the environment and prevent over exploitation of fossil resources on earth; the texturing machine is modified to break through the dyeing different sections of single yarn, so that the cloth woven in the subsequent step has the effect of double-color float white; the prepared regenerated floating white cladding yarn can be fed into a circular knitting machine for weft knitting at one time, and the product solves the problem that spandex needs to be added to the circular knitting machine double-color elastic fabric independently; the prepared regenerated floating white cladding yarn is developed successfully, so that the consumer and the subsequent clothing factories have more choices for environment-friendly different-color products, and the market share of regenerated environment-friendly fibers is improved.
For ease of explanation, specific nomenclature is used in the above description to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art that these specific details are not required in order to practice the embodiments described above. Thus, the foregoing descriptions of specific embodiments described herein are presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the embodiments to the precise form disclosed. It will be apparent to those skilled in the art that certain modifications, combinations and variations are possible in light of the above teachings.

Claims (7)

1. A preparation method of a regenerated chinlon floating white air-coated yarn is characterized by comprising the following steps: the method comprises the following steps:
(1) Preparing regenerated nylon POY filaments by adopting a regenerated environment-friendly slice raw material for spinning; the method comprises the following specific steps:
spinning: fully and uniformly melting slice raw materials by using a German Bama lattice screw extruder, wherein the temperature of each section of the screw extruder is set between 255 ℃ and 280 ℃, and the screw pressure is 115-125 kg/cm 2 The rotating speed of the screw is 40-45 r/min, and the melt spinning temperature is 255-268 ℃;
and (5) cooling by side blowing: the wind temperature is 20-28 ℃, the humidity is 90-95%, and the wind speed is 0.5-0.55m/s;
oiling and bundling: the fiber cooled by the lateral blowing is oiled and bundled by an oil nozzle; the used oiling agent is 8% nylon oiling agent pure water emulsion;
winding: the oiling tows are wound through a pre-network device, a yarn guiding disc and a main network device, the winding speed is 4100-4200m/min, and the regenerated nylon POY filaments with stable quality are obtained;
(2) The prepared regenerated nylon POY filaments and spandex are regularly subjected to different stretching treatments on an empty bag integrated machine, so that the regenerated nylon POY filaments and spandex are on the same filament and have multiple sections of different crystals;
the specific parameters of the empty bag integrated machine are as follows:
the speed of the machine is 600 m/min, the drawing multiple DR of the regenerated nylon POY filament is 1.22-1.35, the ratio DY of the rotating speed of the false twister to the running speed of the regenerated nylon POY filament is 1.6-1.65, the temperature of the hot box when the nylon POY filament passes through the hot box is 175-180 ℃, the false twister is 1-5-1, the spandex drawing ratio is 3.5, and the network pressure is 4.3.
2. The method for preparing the regenerated chinlon floating white air-coated yarn according to claim 1, which is characterized in that: the regenerated environment-friendly slice raw material is prepared from modified mixed materials; the modified mixture comprises a regenerated polyamide base material and a modified master batch; 91-98% of regenerated polyamide base material and 2-9% of modified master batch; the regenerated polyamide base material is prepared from recycled polyamide, and the modified master batch comprises the following components in parts by weight: 50 parts of polyamide-based particles, 5-10 parts of bismuth nitrate, 1-3 parts of yttrium oxide, 5-8 parts of nano titanium dioxide and 2-5 parts of other auxiliary agents.
3. The method for preparing the regenerated chinlon floating white air-coated yarn according to claim 1, which is characterized in that: different stretching is regularly carried out on the empty bag integrated machine, and the method is specifically realized in the following manner:
a groove roller for adjusting the regenerated nylon POY filament is arranged on the blank all-in-one machine, and a shifting fork device for attaching and detaching the regenerated nylon POY filament and the groove roller is arranged in a matched mode, so that the attaching and detaching of the regenerated nylon POY filament and the groove position of the groove roller are achieved through the shifting fork device at a certain reciprocating swing frequency.
4. The method for preparing the regenerated chinlon floating white air-coated yarn according to claim 3, which is characterized in that: half of the grooved roller is arranged as a reserved area and half of the grooved roller is arranged as a grooved area, and the grooved area is provided with a plurality of grooved notches at intervals along the circumferential side of the roller;
the shifting fork device shifts the regenerated nylon POY filaments to be positioned in the groove area of the groove roller, part of the regenerated nylon POY filaments are attached to the peripheral side surface of the groove roller, and part of the regenerated nylon POY filaments are positioned at the groove notch so as to be separated from the peripheral side surface of the groove roller; thereby forming intermittent lamination of the regenerated nylon POY filaments and the roller;
the shifting fork device shifts the regenerated nylon POY filaments to be positioned in the reserved area of the grooved roller, and the nylon POY filaments are attached to the peripheral side surface of the grooved roller.
5. The method for preparing the regenerated chinlon floating white air-coated yarn according to claim 3, which is characterized in that: the reciprocating swing frequency of the shifting fork device for the regenerated nylon POY filament is 10 times/min.
6. The method for preparing the regenerated chinlon floating white air-coated yarn according to claim 1, which is characterized in that: the screw extruder adopts multistage temperature setting, specifically adopts five sections heating methods, and the entry is divided into five sections to the export in proper order, and the length proportion of five sections is in proper order: 1:2:2:3:1, and the temperatures of all the sections are as follows in sequence: first zone 255-260 ℃, second zone 265-270 ℃, third zone 275-280 ℃, fourth zone 265-270 ℃, and fifth zone 260-270 ℃.
7. The method for preparing the regenerated chinlon floating white air-coated yarn according to claim 1, which is characterized in that: the oil-applying rate is 2-2.5%.
CN202310540288.0A 2023-05-15 2023-05-15 Preparation method of regenerated chinlon floating white air-coated yarn Pending CN116623335A (en)

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