CN115573049A - Processing technology of high-strength high-toughness polyamide industrial yarn - Google Patents

Processing technology of high-strength high-toughness polyamide industrial yarn Download PDF

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CN115573049A
CN115573049A CN202211183499.5A CN202211183499A CN115573049A CN 115573049 A CN115573049 A CN 115573049A CN 202211183499 A CN202211183499 A CN 202211183499A CN 115573049 A CN115573049 A CN 115573049A
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attapulgite
modified
spinning
toughness
modified nylon
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张良铖
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Fujian Zhongjin New Materials Co ltd
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Fujian Zhongjin New Materials Co ltd
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    • 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
    • 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
    • D01D5/082—Melt spinning methods of mixed 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
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
    • 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
    • D01D5/12—Stretch-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

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Artificial Filaments (AREA)

Abstract

A processing technology of high-strength high-toughness chinlon industrial yarn comprises the following steps: conveying modified nylon particles with relative viscosity of 2.4-2.7 into a drying tower, and circularly drying by adopting nitrogen to obtain high-viscosity modified nylon particles with relative viscosity of 3.0-3.3; conveying the high-viscosity modified nylon particles into a screw extruder, and performing melt extrusion on the high-viscosity modified nylon particles to form a spinning melt; conveying the spinning melt into a spinning box through a melt pipeline, quantitatively pressing the spinning melt into a spinning assembly through a metering pump, and then spraying the spinning melt out of a spinneret plate to form modified nylon tows in the spinning box; step four, cooling the obtained modified nylon tows, then performing stretching and shaping treatment, and finally performing winding treatment to obtain the high-strength and high-toughness nylon industrial yarn; according to the invention, the prepared nylon particles are modified by adding the reinforcing fibers and the modified attapulgite, so that the strength and toughness of the finally prepared nylon industrial yarn are greatly improved.

Description

Processing technology of high-strength high-toughness polyamide industrial yarn
Technical Field
The invention belongs to the field of preparation of nylon industrial yarns, and particularly relates to a processing technology of high-strength and high-toughness nylon industrial yarns.
Background
Chinlon is a trade name of polyamide fiber and is a general name of thermoplastic resin containing repeated amide groups on a molecular main chain. The main varieties are nylon 6 and nylon 66. The nylon yarn is made of polyamide fiber, and is divided into nylon filament and nylon staple.
The nylon has a wide application range, for example, in the aspect of clothes, the nylon filament is made into stretch yarn, and the staple yarn is blended with cotton and acrylic fiber. The nylon can be used for manufacturing sportswear, casual clothes, quick-drying clothes, down jackets, outdoor tents and the like. The main industrial application of the nylon filament is the production of high-performance tires, airbags, ropes, conveyor belts and the like.
However, in the prior art, the problem that the nylon yarn is difficult to meet a wide application scene due to insufficient strength often exists, and a person skilled in the art wants to develop a new nylon yarn to have higher strength, so that the requirement of practical application can be better met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a processing technology of high-strength high-toughness nylon industrial yarn.
The invention adopts the following technical scheme:
a processing technology of high-strength high-toughness chinlon industrial yarn comprises the following steps:
conveying the modified nylon particles with the relative viscosity of 2.4-2.7 into a drying tower, and circularly drying by adopting nitrogen to obtain high-viscosity modified nylon particles with the relative viscosity of 3.0-3.3;
conveying the high-viscosity modified nylon particles into a screw extruder, and performing melt extrusion on the high-viscosity modified nylon particles to form a spinning melt;
conveying the spinning melt into a spinning box through a melt pipeline, quantitatively pressing the spinning melt into a spinning assembly through a metering pump, and then spraying the spinning melt out of a spinneret plate to form modified nylon tows in the spinning box;
step four, cooling the obtained modified nylon tows, then performing stretching and shaping treatment, and finally performing winding treatment to obtain the high-strength and high-toughness nylon industrial yarn;
the preparation method of the modified nylon chip comprises the following steps:
mixing 35-50 parts by weight of polyamide resin, 7-12 parts by weight of modified attapulgite, 5-6 parts by weight of reinforcing fiber, 1-2 parts by weight of ethylene-acrylic acid copolymer wax, 4-6 parts by weight of benzene, 1-2 parts by weight of hydroxyl silicone oil and 1-3 parts by weight of maleic anhydride grafted POE, ultrasonically stirring for 30-50min, mixing by a high-speed mixer, and then pressurizing and extruding to obtain modified polyamide particles.
Preferably, the reinforcing fiber consists of granite fiber, carbon fiber and glass fiber in a weight ratio of 1.
Preferably, in the third step, the temperature of the spinning box is 285-305 ℃, and the residence time of the spinning melt in the spinning assembly is 2-3min.
Preferably, the preparation method of the modified attapulgite comprises the following steps:
(1) Pulverizing attapulgite to 10-20 mesh, adding pulverized attapulgite into water, stirring, soaking for more than 12 hr, centrifuging, filtering, and drying;
(2) Adding the attapulgite treated in the first step into concentrated phosphoric acid solution, stirring and heating at the stirring speed of 180-250r/min and the heating temperature of 80-90 ℃; then filtering to remove the concentrated phosphoric acid solution, washing the attapulgite with a weak base solution to be neutral, washing with deionized water for 2-3 times, and drying for later use;
(3) Raising the temperature of the attapulgite obtained in the step two from room temperature to 250-300 ℃, enabling water vapor to contact and react with the attapulgite through inert gas, starting to cool after the reaction is finished, and stopping adding the water vapor; and after the temperature is reduced to room temperature, taking out the attapulgite, washing with water, drying, grinding and crushing to obtain the nanoscale modified attapulgite.
Preferably, in the step (2), the phosphoric acid solution has a mass concentration of 5%.
Preferably, in the fourth step, the total stretching multiple of the modified nylon tows is 2.5-2.8.
Preferably, in the third step, the spraying speed of the modified nylon tows is 6-8m/min.
As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are: according to the invention, the processing technology of the industrial nylon yarn is limited, and the prepared nylon particles are modified by adding the reinforced fiber and the modified attapulgite, so that the strength and toughness of the finally prepared industrial nylon yarn are greatly improved, wherein the tensile strength is more than 136MPa, the breaking strength is more than 10.5g/d, the breaking elongation is more than 21.5%, and the nylon yarn has a wide application prospect;
by adding maleic anhydride grafted POE and hydroxyl silicone oil as compatilizers, the compatibility among the components is increased, so that the raw materials are uniformly mixed, and the performance of the finally prepared nylon industrial yarn is ensured;
through the modification step of injecing the attapulgite, modify the attapulgite, reduce its surface stress, prevent to reunite, do benefit to the homodisperse of modified attapulgite, effectively cooperate with other auxiliaries, and then improve the mechanical properties of the polyamide fibre industrial yarn of preparation, satisfy the production demand.
Detailed Description
The invention is further described below by means of specific embodiments.
A processing technology of high-strength high-toughness chinlon industrial yarn comprises the following steps:
conveying modified nylon particles with relative viscosity of 2.4-2.7 into a drying tower, and circularly drying by adopting nitrogen to obtain high-viscosity modified nylon particles with relative viscosity of 3.0-3.3;
conveying the high-viscosity modified nylon particles into a screw extruder, and performing melt extrusion on the high-viscosity modified nylon particles to form a spinning melt;
conveying the spinning melt into a spinning box through a melt pipeline, quantitatively pressing the spinning melt into a spinning assembly through a metering pump, and then spraying the spinning melt out of a spinneret plate to form modified nylon tows in the spinning box; wherein the temperature of the spinning box is 285-305 ℃, the residence time of the spinning melt in the spinning assembly is 2-3min, and the ejection speed of the modified nylon filament bundle is 6-8m/min;
and step four, cooling the obtained modified nylon tows, then performing stretching and shaping treatment, and finally performing winding treatment to obtain the high-strength and high-toughness nylon industry, wherein the total stretching multiple of the modified nylon tows is 2.5-2.8.
The preparation method of the modified nylon chip comprises the following steps:
mixing 35-50 parts by weight of polyamide resin, 7-12 parts by weight of modified attapulgite, 5-6 parts by weight of reinforcing fiber, 1-2 parts by weight of ethylene-acrylic acid copolymer wax, 4-6 parts by weight of benzene, 1-2 parts by weight of hydroxyl silicone oil and 1-3 parts by weight of maleic anhydride grafted POE, ultrasonically stirring for 30-50min, mixing by a high-speed mixer, and then pressurizing and extruding to obtain modified polyamide particles.
Specifically, the reinforcing fiber consists of granite fiber, carbon fiber and glass fiber according to the weight ratio of 1.3-0.5.
The preparation method of the modified attapulgite comprises the following steps:
(1) Pulverizing attapulgite to 10-20 mesh, adding pulverized attapulgite into water, stirring, soaking for more than 12 hr, centrifuging, filtering, and drying;
(2) Adding the attapulgite treated in the first step into concentrated phosphoric acid solution with the mass concentration of 5%, stirring and heating at the stirring speed of 180-250r/min and the heating temperature of 80-90 ℃; then filtering to remove the concentrated phosphoric acid solution, washing the attapulgite with a weak base solution to be neutral, washing with deionized water for 2-3 times, and drying for later use;
(3) Raising the temperature of the attapulgite obtained in the step two to 250-300 ℃ from room temperature, enabling water vapor to contact and react with the attapulgite through inert gas, and after the reaction is finished, starting to cool and stopping adding the water vapor; and after the temperature is reduced to room temperature, taking out the attapulgite, washing with water, drying, grinding and crushing to obtain the nanoscale modified attapulgite.
Example 1
A processing technology of high-strength high-toughness chinlon industrial yarn comprises the following steps:
conveying the modified nylon particles with the relative viscosity of 2.4 into a drying tower, and circularly drying by adopting nitrogen to obtain high-viscosity modified nylon particles with the relative viscosity of 3.0;
conveying the high-viscosity modified nylon particles into a screw extruder, and performing melt extrusion on the high-viscosity modified nylon particles to form a spinning melt;
conveying the spinning melt into a spinning box through a melt pipeline, quantitatively pressing the spinning melt into a spinning assembly through a metering pump, and then spraying the spinning melt out of a spinneret plate to form modified nylon tows in the spinning box; wherein the temperature of the spinning box is 285 ℃, the residence time of the spinning melt in the spinning assembly is 3min, and the ejection speed of the modified nylon filament bundle is 6m/min;
and step four, cooling the obtained modified nylon tows, then performing stretching and shaping treatment, and finally performing winding treatment to obtain the high-strength and high-toughness nylon industry, wherein the total stretching multiple of the modified nylon tows is 2.5.
The preparation method of the modified nylon chip comprises the following steps:
mixing 35 parts by weight of polyamide resin, 7 parts by weight of modified attapulgite, 6 parts by weight of reinforcing fiber, 1 part by weight of ethylene-acrylic acid copolymer wax, 6 parts by weight of benzene, 1 part by weight of hydroxy silicone oil and 3 parts by weight of maleic anhydride grafted POE, ultrasonically stirring for 30min, mixing by a high-speed mixing mill, and then pressurizing and extruding to obtain modified polyamide particles.
Specifically, the reinforcing fiber consists of granite fiber, carbon fiber and glass fiber according to the weight ratio of 1.3.
The preparation method of the modified attapulgite comprises the following steps:
(1) Pulverizing attapulgite into 10-20 mesh, adding pulverized attapulgite into water, stirring, soaking for more than 12 hr, centrifuging, filtering, and drying;
(2) Adding the attapulgite treated in the first step into concentrated phosphoric acid solution with the mass concentration of 5%, stirring and heating at the stirring speed of 180r/min and the heating temperature of 80 ℃; then filtering to remove a phosphoric acid concentrated solution, washing the attapulgite with a weak base solution to be neutral, washing with deionized water for 2 times, and drying for later use;
(3) Raising the temperature of the attapulgite obtained in the step two from room temperature to 250 ℃, enabling water vapor to contact and react with the attapulgite through inert gas, starting to cool after the reaction is finished, and stopping adding the water vapor; and after the temperature is reduced to room temperature, taking out the attapulgite, washing with water, drying, grinding and crushing to obtain the nanoscale modified attapulgite.
Example 2
A processing technology of high-strength high-toughness chinlon industrial yarn comprises the following steps:
conveying the modified nylon particles with the relative viscosity of 2.7 into a drying tower, and circularly drying by adopting nitrogen to obtain high-viscosity modified nylon particles with the relative viscosity of 3.3;
conveying the high-viscosity modified nylon particles into a screw extruder, and performing melt extrusion on the high-viscosity modified nylon particles to form a spinning melt;
conveying the spinning melt into a spinning box through a melt pipeline, quantitatively pressing the spinning melt into a spinning assembly through a metering pump, and then spraying the spinning melt out of a spinneret plate to form modified nylon tows in the spinning box; wherein the temperature of the spinning box is 305 ℃, the residence time of the spinning melt in the spinning assembly is 2min, and the ejection speed of the modified nylon tows is 8m/min;
and step four, cooling the obtained modified nylon tows, then performing stretching and shaping treatment, and finally performing winding treatment to obtain the high-strength and high-toughness nylon industry, wherein the total stretching multiple of the modified nylon tows is 2.8.
The preparation method of the modified nylon chip comprises the following steps:
50 parts by weight of nylon resin, 12 parts by weight of modified attapulgite, 5 parts by weight of reinforcing fiber, 2 parts by weight of ethylene-acrylic acid copolymer wax, 4 parts by weight of benzene, 2 parts by weight of hydroxy silicone oil and 1 part by weight of maleic anhydride grafted POE are mixed, ultrasonically stirred for 50min, mixed by a high-speed mixer, and then pressed and extruded to obtain modified nylon particles.
Specifically, the reinforcing fiber consists of granite fiber, carbon fiber and glass fiber according to the weight ratio of 1.
The preparation method of the modified attapulgite comprises the following steps:
(1) Pulverizing attapulgite to 10-20 mesh, adding pulverized attapulgite into water, stirring, soaking for more than 12 hr, centrifuging, filtering, and drying;
(2) Adding the attapulgite treated in the first step into concentrated phosphoric acid solution with the mass concentration of 5%, stirring and heating at the stirring speed of 250r/min and the heating temperature of 90 ℃; then filtering to remove a phosphoric acid concentrated solution, washing the attapulgite with a weak base solution to be neutral, washing with deionized water for 3 times, and drying for later use;
(3) Raising the temperature of the attapulgite obtained in the step two to 300 ℃ from room temperature, enabling water vapor to contact and react with the attapulgite through inert gas, starting to cool after the reaction is finished, and stopping adding the water vapor; and after the temperature is reduced to room temperature, taking out the attapulgite, washing with water, drying, grinding and crushing to obtain the nanoscale modified attapulgite.
Example 3
A processing technology of high-strength high-toughness chinlon industrial yarn comprises the following steps:
conveying the modified nylon particles with the relative viscosity of 2.55 into a drying tower, and circularly drying by adopting nitrogen to obtain high-viscosity modified nylon particles with the relative viscosity of 3.15;
conveying the high-viscosity modified nylon particles into a screw extruder, and performing melt extrusion on the high-viscosity modified nylon particles to form a spinning melt;
conveying the spinning melt into a spinning box through a melt pipeline, quantitatively pressing the spinning melt into a spinning assembly through a metering pump, and then spraying the spinning melt out of a spinneret plate to form modified nylon tows in the spinning box; wherein the temperature of the spinning box is 295 ℃, the residence time of the spinning melt in the spinning assembly is 2.5min, and the ejection speed of the modified nylon filament bundle is 7m/min;
and step four, cooling the obtained modified nylon tows, then performing stretching and shaping treatment, and finally performing winding treatment to obtain the high-strength and high-toughness nylon industry, wherein the total stretching multiple of the modified nylon tows is 2.7.
The preparation method of the modified nylon chip comprises the following steps:
42 parts by weight of polyamide resin, 9 parts by weight of modified attapulgite, 5.5 parts by weight of reinforcing fiber, 1.5 parts by weight of ethylene-acrylic acid copolymer wax, 5 parts by weight of benzene, 1.5 parts by weight of hydroxyl silicone oil and 2 parts by weight of maleic anhydride grafted POE are mixed, stirred ultrasonically for 40min, mixed by a high-speed mixer and then extruded under pressure to form modified polyamide particles.
Specifically, the reinforcing fiber consists of granite fiber, carbon fiber and glass fiber according to the weight ratio of 1.4.
The preparation method of the modified attapulgite comprises the following steps:
(1) Pulverizing attapulgite to 10-20 mesh, adding pulverized attapulgite into water, stirring, soaking for more than 12 hr, centrifuging, filtering, and drying;
(2) Adding the attapulgite treated in the first step into concentrated phosphoric acid solution with the mass concentration of 5%, stirring and heating at the stirring speed of 220r/min and the heating temperature of 85 ℃; then filtering to remove a phosphoric acid concentrated solution, washing the attapulgite with a weak base solution to be neutral, washing with deionized water for 3 times, and drying for later use;
(3) Raising the temperature of the attapulgite obtained in the step two from room temperature to 275 ℃, enabling water vapor to contact and react with the attapulgite through inert gas, starting cooling after the reaction is finished, and stopping adding the water vapor; and after the temperature is reduced to room temperature, taking out the attapulgite, washing with water, drying, grinding and crushing to obtain the nanoscale modified attapulgite.
Comparative example 1
The raw material composition and the processing technology are basically consistent with those of the embodiment 3, and the differences are as follows: modified attapulgite is not added in the raw material composition.
Comparative example 2
The raw material composition and the processing technology are basically consistent with those of the embodiment 3, and the differences are as follows: the attapulgite is conventional attapulgite, and is not subjected to modification treatment.
Comparative example 3
The raw material composition and the processing technology are basically consistent with those of the embodiment 3, and the differences are as follows: the raw material composition is not added with hydroxyl silicone oil.
Comparative example 4
The raw material composition and the processing technology are basically consistent with those of the embodiment 3, and the differences are as follows: maleic anhydride grafted POE and hydroxyl silicone oil are not added in the raw material composition.
The industrial nylon yarns prepared in the examples 1 to 3 and the comparative examples 1 to 4 are tested, and the following data are obtained:
table 1 table of performance data of each example
Figure BDA0003866251480000091
Figure BDA0003866251480000101
According to the table, the processing technology of the industrial nylon yarn is limited, the prepared nylon particles are modified by adding the reinforcing fiber and the modified attapulgite, so that the strength and the toughness of the finally prepared industrial nylon yarn are greatly improved, wherein the tensile strength is greater than 136MPa, the breaking strength is greater than 10.5g/d, the breaking elongation is greater than 21.5%, and the industrial nylon yarn has a wide application prospect; by adding maleic anhydride grafted POE and hydroxyl silicone oil as compatilizers, the compatibility among the components is increased, so that the raw materials are uniformly mixed, and the performance of the finally prepared nylon industrial yarn is ensured; through the modification step of injecing the attapulgite, modify the attapulgite, reduce its surface stress, prevent to reunite, do benefit to the homodisperse of modified attapulgite, effectively cooperate with other auxiliaries, and then improve the mechanical properties of the polyamide fibre industrial yarn of preparation, satisfy the production demand.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents and modifications within the scope of the description.

Claims (7)

1. A processing technology of high-strength high-toughness chinlon industrial yarn is characterized by comprising the following steps: the method comprises the following steps:
conveying modified nylon particles with relative viscosity of 2.4-2.7 into a drying tower, and circularly drying by adopting nitrogen to obtain high-viscosity modified nylon particles with relative viscosity of 3.0-3.3;
conveying the high-viscosity modified nylon particles into a screw extruder, and performing melt extrusion on the high-viscosity modified nylon particles to form a spinning melt;
conveying the spinning melt into a spinning box through a melt pipeline, quantitatively pressing the spinning melt into a spinning assembly through a metering pump, and then spraying the spinning melt out of a spinneret plate to form modified nylon tows in the spinning box;
step four, cooling the obtained modified nylon tows, then performing stretching and shaping treatment, and finally performing winding treatment to obtain the high-strength and high-toughness nylon industrial yarn;
the preparation method of the modified nylon chip comprises the following steps:
mixing 35-50 parts by weight of polyamide resin, 7-12 parts by weight of modified attapulgite, 5-6 parts by weight of reinforcing fiber, 1-2 parts by weight of ethylene-acrylic acid copolymer wax, 4-6 parts by weight of benzene, 1-2 parts by weight of hydroxyl silicone oil and 1-3 parts by weight of maleic anhydride grafted POE, ultrasonically stirring for 30-50min, mixing by a high-speed mixer, and then pressurizing and extruding to obtain modified polyamide particles.
2. The processing technology of the high-strength high-toughness chinlon industrial yarn according to claim 1, characterized by comprising the following steps of: the reinforcing fiber consists of granite fiber, carbon fiber and glass fiber according to the weight ratio of 1.3-0.5.
3. The processing technology of the high-strength high-toughness chinlon industrial yarn according to claim 1, characterized by comprising the following steps of: in the third step, the temperature of the spinning box is 285-305 ℃, and the retention time of the spinning melt in the spinning assembly is 2-3min.
4. The processing technology of the high-strength high-toughness chinlon industrial yarn according to claim 1, characterized by comprising the following steps of: the preparation method of the modified attapulgite comprises the following steps:
(1) Pulverizing attapulgite into 10-20 mesh, adding pulverized attapulgite into water, stirring, soaking for more than 12 hr, centrifuging, filtering, and drying;
(2) Adding the attapulgite treated in the first step into concentrated phosphoric acid solution, stirring and heating at the stirring speed of 180-250r/min and the heating temperature of 80-90 ℃; then filtering to remove the concentrated phosphoric acid solution, washing the attapulgite with a weak base solution to be neutral, washing with deionized water for 2-3 times, and drying for later use;
(3) Raising the temperature of the attapulgite obtained in the step two from room temperature to 250-300 ℃, enabling water vapor to contact and react with the attapulgite through inert gas, starting to cool after the reaction is finished, and stopping adding the water vapor; and after the temperature is reduced to room temperature, taking out the attapulgite, washing with water, drying, grinding and crushing to obtain the nanoscale modified attapulgite.
5. The processing technology of the high-strength high-toughness chinlon industrial yarn according to claim 4, characterized in that: in the step (2), the mass concentration of the phosphoric acid solution is 5%.
6. The processing technology of the high-strength high-toughness chinlon industrial yarn according to claim 1, characterized by comprising the following steps of: in the fourth step, the total stretching multiple of the modified nylon tows is 2.5-2.8.
7. The processing technology of the high-strength high-toughness chinlon industrial yarn according to claim 1, characterized by comprising the following steps of: in the third step, the spraying speed of the modified nylon tows is 6-8m/min.
CN202211183499.5A 2022-09-27 2022-09-27 Processing technology of high-strength high-toughness polyamide industrial yarn Pending CN115573049A (en)

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