CN111519267A - Copolymer fiber with higher breaking strength and preparation process thereof - Google Patents

Copolymer fiber with higher breaking strength and preparation process thereof Download PDF

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Publication number
CN111519267A
CN111519267A CN202010369050.2A CN202010369050A CN111519267A CN 111519267 A CN111519267 A CN 111519267A CN 202010369050 A CN202010369050 A CN 202010369050A CN 111519267 A CN111519267 A CN 111519267A
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Prior art keywords
fiber
breaking strength
temperature
higher breaking
preparing
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CN202010369050.2A
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Chinese (zh)
Inventor
马驰
陈建新
沈家广
吉增明
孔令根
陆灯红
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Haiyang Technology Co Ltd
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Haiyang Technology Co Ltd
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Priority to CN202010369050.2A priority Critical patent/CN111519267A/en
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    • 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
    • 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
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • 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
    • 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)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Artificial Filaments (AREA)

Abstract

The invention discloses a copolymer fiber with higher breaking strength and a preparation process thereof, wherein the preparation process comprises the following steps: the fiber body is formed by bundling a plurality of fiber monofilaments, a bulge is arranged on the surface of the outer wall of each fiber monofilament, and a gap is formed between every two adjacent fiber monofilaments; the invention discovers that the PA666 fiber has higher breaking strength by analyzing the mechanical property, when the addition amount of the nylon 66 salt is 8 percent, the breaking strength is increased to 6.35 cN/dtex from 5.62 cN/dtex of the PA6 fiber, and the elongation at break is reduced to 17.40 percent from 24.70 percent, so that the strength is increased, and simultaneously, the sufficient ductility can be ensured to be processed and the better hand feeling requirement of fiber products can be met; the crystallinity of the PA666 fiber is reduced, the orientation degree of a crystal region is not greatly changed, but the sound velocity orientation factor is increased; the PA666 fiber has higher storage modulus and loss modulus, and has lower loss tangent value at low temperature and better low-temperature service performance under the condition of adding 4 percent and 8 percent of nylon 66 salt.

Description

Copolymer fiber with higher breaking strength and preparation process thereof
Technical Field
The invention relates to the technical field of textile industry, in particular to a copolymer fiber with higher breaking strength and a preparation process thereof.
Background
The polyamide 66(PA66) fiber is also called polyhexamethylene adipamide fiber and nylon 66. One of the main varieties of aliphatic polyamide fibers. The resin was prepared from adipic acid and hexamethylenediamine and spun by the melt process. The product is mainly made of long yarns, and also comprises deformed yarns, short yarns and the like. Fiber properties: a melting point of 255-264 ℃, a glass transition temperature (n) of 50 ℃, and a density of 1.149/cm 3. The strength of the common fiber is 4.9-5.6 cN/dtex. The strength yarn is 5.7-7.7 cN/dtex. The elongation is 26-40%. The rebound resilience is 95-100% when the elongation is 3%. The water absorption rate is 4%. Soluble in m-cresol. Can be made into woven, knitted, warp knitted fabrics, etc. The product can be used for socks, underwear, shirts, sport shirts, carpets, bedding decoration fabrics and the like, can be blended with cotton, wool, viscose fibers and the like, and can be used for manufacturing tyre cord threads, parachute silk, transmission belts, ropes, fishing nets, sewing threads, filter cloth and the like in the industrial aspect.
However, most of the copolymer fibers in the market have single functionality, so that the copolymer fibers are inconvenient to use, and the traditional copolymer fibers have low overall strength and are easy to break, thereby influencing the use effect of the copolymer fibers.
Disclosure of Invention
The present invention is directed to a copolymer fiber with higher breaking strength and a process for preparing the same, which solves the problems of the background art mentioned above.
In order to achieve the purpose, the invention provides the following technical scheme: a copolymer fiber with higher breaking strength and a preparation process thereof comprise: the fiber body is formed by bundling a plurality of fiber monofilaments, a bulge is arranged on the surface of the outer wall of each fiber monofilament, and a gap is formed between every two adjacent fiber monofilaments;
wherein, the fiber monofilament comprises the following components in percentage by weight: 50% -80% of PA666 slices and 4% -8% of nylon 66 salt.
Preferably, the protrusions are uniformly distributed on the surface of the fiber monofilament at intervals, and the protrusions are in a rectangular structure.
Preferably, the PA666 chip is prepared from PA666 resin through a two-step method of melt spinning and post-drawing.
Preferably, the method comprises the following steps:
s1 and PA666 slice preparation: firstly, preparing PA666 resin slices by a two-step method of melt spinning and back drawing of PA666 resin;
s2, drying: fully drying the prepared PA666 resin slices in a JM-500 ZDDGX type vacuum rotary drum oven;
s3, melt spinning: then, putting the dried PA666 resin slices and nylon 66 salt into nano composite fiber melt spinning forming test equipment, and carrying out a melt spinning experiment on the PA666 resin slices through the nano composite fiber melt spinning forming test equipment;
s4, drafting: and finally, finishing the back drawing process in a drawing machine to obtain the PA666 copolymerized fiber.
Preferably, in step S2, the drying procedure is vacuum drying at 65 ℃ and pre-crystallizing for 10 h, and then heating to 95 ℃ and vacuum drying for 8 h to fully pre-crystallize; finally, the crystal water is fully removed by vacuum drying for 15 h at 120 ℃.
Preferably, in step S3, the spinneret parameters are selected as follows: contains 36 spinneret holes with the size of 0.3X 0.75 mm.
Preferably, in step S3, the specification of the metering pump is 1.2 ml/r, the rotating speed of the metering pump is 16-20 r/min, and the winding speed is 2850 r/min.
Preferably, in step S4, the draft ratios of the copolymerized fibers are all 1.45.
Preferably, in step S3, the spinning process conditions are as follows: temperature in first zone of screw: 260 ℃ and 280 ℃, and the temperature of the second screw zone: at temperature of 270 ℃ and 300 ℃, and the temperature of the screw in the three zones: 270 ℃ and 300 ℃, head temperature: 270 ℃ plus 300 ℃, adapter temperature: 270-300, spinning box temperature: 270-300.
Preferably, in step S4, the process conditions of the drawing are: drafting temperature: 55-60 ℃, setting temperature: 100-120 ℃.
Compared with the prior art, the invention has the beneficial effects that:
the invention discovers that the PA666 fiber has higher breaking strength by analyzing the mechanical property, when the addition amount of the nylon 66 salt is 8 percent, the breaking strength is increased to 6.35 cN/dtex from 5.62 cN/dtex of the PA6 fiber, and the elongation at break is reduced to 17.40 percent from 24.70 percent, so that the strength is increased, and simultaneously, the sufficient ductility can be ensured to be processed and the better hand feeling requirement of fiber products can be met; the crystallinity of the PA666 fiber is reduced, the orientation degree of a crystal region is not greatly changed, but the sound velocity orientation factor is increased; the PA666 fiber has higher storage modulus and loss modulus, and has lower loss tangent value at low temperature and better low-temperature service performance under the condition of adding 4 percent and 8 percent of nylon 66 salt.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic cross-sectional structure of the present invention.
In the figure: 1-a fiber body; 2-fiber monofilament; 3-voids; 4-a convex part.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a copolymer fiber with higher breaking strength and a preparation process thereof comprise: the fiber body 1 is formed by bundling a plurality of fiber monofilaments 2, a convex part 4 is arranged on the outer wall surface of each fiber monofilament 2, and a gap 3 is arranged between every two adjacent fiber monofilaments 2;
wherein, the fiber monofilament 2 comprises the following components in percentage by weight: 50% -80% of PA666 slices and 4% -8% of nylon 66 salt.
The convex parts 4 are uniformly distributed on the surface of the fiber monofilament 2 at intervals, and the convex parts 4 are in a rectangular structure.
Wherein, the PA666 slices are prepared from PA666 resin through a two-step method of melt spinning and post-drawing. The PA666 chain segment is combined:
Figure DEST_PATH_IMAGE002
。
example 2:
a preparation process of a copolymer fiber with higher breaking strength comprises the following steps:
s1 and PA666 slice preparation: firstly, preparing PA666 resin slices by a two-step method of melt spinning and back drawing of PA666 resin;
s2, drying: fully drying the prepared PA666 resin slices in a JM-500 ZDDGX type vacuum rotary drum oven;
s3, melt spinning: then, putting the dried PA666 resin slices and nylon 66 salt into nano composite fiber melt spinning forming test equipment, and carrying out a melt spinning experiment on the PA666 resin slices through the nano composite fiber melt spinning forming test equipment;
s4, drafting: and finally, finishing the back drawing process in a drawing machine to obtain the PA666 copolymerized fiber.
In step S2, the drying procedure comprises vacuum drying at 65 deg.C and pre-crystallizing for 10 h, heating to 95 deg.C, and vacuum drying for 8 h for fully pre-crystallizing; finally, the crystal water is fully removed by vacuum drying for 15 h at 120 ℃.
In step S3, the selected spinneret parameters are: contains 36 spinneret holes with the size of 0.3X 0.75 mm.
Wherein, in step S3, the specification of the metering pump is 1.2 ml/r, the rotating speed of the metering pump is 16-20 r/min, and the winding speed is 2850 r/min.
In step S4, the draft ratios of the copolymerized fibers were all 1.45.
In step S3, the spinning process conditions are as follows: temperature in first zone of screw: 260 ℃ and 280 ℃, and the temperature of the second screw zone: at temperature of 270 ℃ and 300 ℃, and the temperature of the screw in the three zones: 270 ℃ and 300 ℃, head temperature: 270 ℃ plus 300 ℃, adapter temperature: 270-300, spinning box temperature: 270-300.
In step S4, the process conditions of the drawing are as follows: drafting temperature: 55-60 ℃, setting temperature: 100-120 ℃.
Combining the above examples, the mechanical property analysis shows that the PA666 fiber has higher breaking strength, when the addition amount of nylon 66 salt is 8%, the breaking strength is increased from 5.62 cN/dtex of PA6 fiber to 6.35 cN/dtex, and the elongation at break is reduced from 24.70% to 17.40%, while the strength is increased, the sufficient ductility during processing can be ensured, and the better hand feeling requirement of fiber products can be met; the crystallinity of the PA666 fiber is reduced, the orientation degree of a crystal region is not greatly changed, but the sound velocity orientation factor is increased; the PA666 fiber has higher storage modulus and loss modulus, and has lower loss tangent value at low temperature and better low-temperature service performance under the condition of adding 4 percent and 8 percent of nylon 66 salt.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A multipolymer fiber having increased breaking strength, comprising: the fiber body (1) is formed by bundling a plurality of fiber monofilaments (2), a bulge (4) is arranged on the outer wall surface of each fiber monofilament (2), and a gap (3) is arranged between every two adjacent fiber monofilaments (2);
wherein, the fiber monofilament (2) comprises the following components in percentage by weight: 50% -80% of PA666 slices and 4% -8% of nylon 66 salt.
2. The conjugate fiber having higher breaking strength as claimed in claim 1, wherein: the protrusions (4) are evenly distributed on the surface of the fiber monofilament (2) at intervals, and the protrusions (4) are of a rectangular structure.
3. The conjugate fiber having higher breaking strength as claimed in claim 1, wherein: the PA666 slices are prepared from PA666 resin through a two-step method of melt spinning and back drawing.
4. The process for preparing a copolymer fiber with higher breaking strength as claimed in claim 1, comprising the steps of:
s1 and PA666 slice preparation: firstly, preparing PA666 resin slices by a two-step method of melt spinning and back drawing of PA666 resin;
s2, drying: fully drying the prepared PA666 resin slices in a JM-500 ZDDGX type vacuum rotary drum oven;
s3, melt spinning: then, putting the dried PA666 resin slices and nylon 66 salt into nano composite fiber melt spinning forming test equipment, and carrying out a melt spinning experiment on the PA666 resin slices through the nano composite fiber melt spinning forming test equipment;
s4, drafting: and finally, finishing the back drawing process in a drawing machine to obtain the PA666 copolymerized fiber.
5. The process for preparing a copolymer fiber with higher breaking strength as claimed in claim 4, wherein: in step S2, the drying procedure is vacuum drying at 65 ℃ and pre-crystallizing for 10 h, then heating to 95 ℃ and vacuum drying for 8 h to fully pre-crystallize; finally, the crystal water is fully removed by vacuum drying for 15 h at 120 ℃.
6. The process for preparing a copolymer fiber with higher breaking strength as claimed in claim 4, wherein: in step S3, the spinneret parameters selected are: contains 36 spinneret holes with the size of 0.3X 0.75 mm.
7. The process for preparing a copolymer fiber with higher breaking strength as claimed in claim 4, wherein: in step S3, the specification of the metering pump is 1.2 ml/r, the rotating speed of the metering pump is 16-20 r/min, and the winding speed is 2850 r/min.
8. The process for preparing a copolymer fiber with higher breaking strength as claimed in claim 4, wherein: in step S4, the draft ratios of the copolymerized fibers were all 1.45.
9. The process for preparing a copolymer fiber with higher breaking strength as claimed in claim 4, wherein: in step S3, the spinning process conditions are: temperature in first zone of screw: 260 ℃ and 280 ℃, and the temperature of the second screw zone: at temperature of 270 ℃ and 300 ℃, and the temperature of the screw in the three zones: 270 ℃ and 300 ℃, head temperature: 270 ℃ plus 300 ℃, adapter temperature: 270-300, spinning box temperature: 270-300.
10. The process for preparing a copolymer fiber with higher breaking strength as claimed in claim 4, wherein: in step S4, the process conditions of the drawing are: drafting temperature: 55-60 ℃, setting temperature: 100-120 ℃.
CN202010369050.2A 2020-05-04 2020-05-04 Copolymer fiber with higher breaking strength and preparation process thereof Pending CN111519267A (en)

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Application Number Priority Date Filing Date Title
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Publications (1)

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