CN115247289B - Co-spun fibers and method of making same - Google Patents
Co-spun fibers and method of making same Download PDFInfo
- Publication number
- CN115247289B CN115247289B CN202210102809.XA CN202210102809A CN115247289B CN 115247289 B CN115247289 B CN 115247289B CN 202210102809 A CN202210102809 A CN 202210102809A CN 115247289 B CN115247289 B CN 115247289B
- Authority
- CN
- China
- Prior art keywords
- poly
- oxadiazole
- sulfuric acid
- spinning solution
- spinning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
-
- 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
- D01D1/00—Treatment of filament-forming or like material
- D01D1/02—Preparation of spinning solutions
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Artificial Filaments (AREA)
Abstract
A co-spinning fiber and a preparation method thereof, belonging to the technical field of fibers. The raw materials of the co-spun fiber comprise polyaromatic oxadiazole and poly-paraphenylene terephthalamide. The preparation method of the co-spun fiber comprises the following steps: spinning the spinning solution to obtain co-spun fiber, wherein the solvent in the spinning solution comprises concentrated sulfuric acid or fuming sulfuric acid, and the solvent is dissolved with polyaromatic oxadiazole and poly-p-phenylene terephthalamide. Which can solve the problem of low strength of the polyaromatic oxadiazole fiber.
Description
Technical Field
The application relates to the technical field of fibers, in particular to a co-spun fiber and a preparation method thereof.
Background
Polyaromatic Oxadiazole (POD) is an aromatic high temperature resistant polymer which can be processed into fibers and is used in the fields of protective fabrics, composite materials, heat insulation materials and the like. The polyaromatic oxadiazole fiber has the advantages of good flexibility and good fatigue resistance, but the molecular chain structure of the polyaromatic oxadiazole is spirally arranged, and along with the increase of molecular weight, serious entanglement phenomenon occurs between macromolecules, and a high orientation structure is not easy to form in the forming processing, so that the formed polyaromatic oxadiazole fiber has low strength.
Disclosure of Invention
The application provides a co-spun fiber and a preparation method thereof, which can solve the problem of low strength of polyaromatic oxadiazole fiber.
Embodiments of the application are implemented as follows:
in a first aspect, embodiments of the present application provide a co-spun fiber, the raw materials of the co-spun fiber comprising polyaromatic oxadiazole and poly-paraphenylene terephthalamide.
In a second aspect, embodiments of the present application provide a method for preparing a co-spun fiber, comprising: spinning the spinning solution to obtain co-spun fiber, wherein the solvent in the spinning solution comprises concentrated sulfuric acid or fuming sulfuric acid, and the solvent is dissolved with polyaromatic oxadiazole and poly-p-phenylene terephthalamide.
The embodiment of the application at least comprises the following beneficial effects:
according to the preparation method of the co-spun fiber, the polyarenyl oxadiazole and the poly-p-phenylene terephthalamide can be dissolved in concentrated sulfuric acid or fuming sulfuric acid, the formed spinning solution can be used for spinning, in the spinning process, the rigid rod-shaped structure of the poly-p-phenylene terephthalamide has the effect of inducing the orientation of polyarenyl oxadiazole molecular chains, and in the spinning process, the drafting multiple of the polyarenyl oxadiazole is effectively improved, so that the orientation degree of the polyarenyl oxadiazole fiber is improved, and the obtained co-spun fiber has high strength.
The raw materials of the co-spinning fiber contain the polyaromatic oxadiazole and the poly-p-phenylene terephthalamide, and compared with the single polyaromatic oxadiazole fiber, the co-spinning fiber has higher strength, and the problem of low strength of the polyaromatic oxadiazole fiber is solved.
Detailed Description
Embodiments of the present application will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only for illustrating the present application and should not be construed as limiting the scope of the present application. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The following is a specific description of the co-spun fibers and the preparation method thereof according to the embodiment of the present application:
in a first aspect, embodiments of the present application provide a co-spun fiber, the raw materials of the co-spun fiber comprising polyaromatic oxadiazole and poly-paraphenylene terephthalamide.
It should be noted that co-spinning refers to a spinning method in which more than one polymer melt or concentrated solution is uniformly mixed and spun into fibers. Wherein, the single Polyaromatic Oxadiazole (POD) fiber has good flexibility, good fatigue resistance, high elongation and low strength. The raw materials of the co-spun fiber in the embodiment of the application comprise polyaromatic oxadiazole and poly-paraphenylene terephthalamide (abbreviated as PPTA in English), and the overall strength is higher than that of the single polyaromatic oxadiazole fiber. In addition, the inventor of the application discovers in the research that the individual poly (p-phenylene terephthalamide) fiber has lower elongation at break and poor fatigue resistance, and the co-spun fiber of the embodiment of the application has higher elongation at break than the individual poly (p-phenylene terephthalamide) fiber, and the co-spun fiber has both higher strength and elongation at break.
The test shows that the breaking strength of the co-spun fibers of the embodiment of the application is 4.5-10.0 cN/dtex, for example, the breaking strength is any one or any numerical value between 4.5cN/dtex, 5cN/dtex, 6cN/dtex, 7cN/dtex, 8cN/dtex, 9cN/dtex and 10 cN/dtex.
The elongation at break of the co-spun fibers of the embodiments of the present application is 10 to 30%, for example, a value of any one or any two of 10%, 15%, 20%, 25% and 30%.
In terms of molecular structure, although the polyaromatic oxadiazole and the poly-p-phenylene terephthalamide are both in rigid chain structures, the molecular chain conformations of the polyaromatic oxadiazole are spirally and spirally distributed, and along with the increase of molecular weight, serious entanglement phenomenon occurs among macromolecules, and high orientation is not easy to form in the process of forming fibers by spinning, so that the strength is low.
The rigid rod-shaped structure of the poly-p-phenylene terephthamide has the function of inducing the orientation of the molecular chain of the poly-aromatic oxadiazole, and can effectively improve the drafting multiple of the poly-aromatic oxadiazole in the spinning process, thereby improving the orientation degree of the poly-aromatic oxadiazole; on the other hand, the nitrogen atom and the oxygen atom on the oxadiazole group in the polyarenyl oxadiazole molecular chain can form a hydrogen bond with an amide bond on the polyparaphenylene terephthalamide molecular chain, so that the intermolecular acting force is further improved, the further improvement of the strength is facilitated, and the co-spun fiber with higher strength is obtained.
In some embodiments, the mass ratio of polyaromatic oxadiazole to poly (paraphenylene terephthalamide) is 5-9:1-5, the strength at break of the co-spun fibers is 5.0-9.5cN/dtex, and the elongation at break is 13-27%.
Illustratively, the mass ratio of polyaromatic oxadiazole to poly (paraphenylene terephthalamide) is 9:1, 8:2, 7:3, 6:4, or 1:1.
The inventors of the present application have found in research that when the quality of the poly-p-phenylene terephthalamide in the raw material is high, the poly-aryloxadiazole can play a plasticizing role, and although the poly-aryloxadiazole breaks the regular structure of the poly-p-phenylene terephthalamide, the flexibility of the whole system is also increased, and the fatigue resistance of the co-spun fiber is higher than that of the poly-p-phenylene terephthalamide fiber alone.
In a second aspect, embodiments of the present application provide a method for preparing a co-spun fiber, comprising: spinning the spinning solution to obtain co-spun fibers, wherein the solvent in the spinning solution comprises concentrated sulfuric acid or fuming sulfuric acid, the polyaromatic oxadiazole and the poly-p-phenylene terephthalamide are dissolved in the solvent, and the polyaromatic oxadiazole and the poly-p-phenylene terephthalamide are dissolved in the concentrated sulfuric acid.
Illustratively, the concentration of concentrated sulfuric acid is 92-100%, e.g., in a range between any one or any two of 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% and 100%.
Wherein oleum refers to sulfuric acid solution of sulfur trioxide, and has chemical formula of H 2 SO 4 ·xSO 3 It is colorless to light brown viscous fuming liquid with density, melting point and boiling point due to SO 3 The content varies. Illustratively, free SO in oleum 3 Less than or equal to 65 percent, the concentration of the converted sulfuric acid is less than or equal to 114.65 percent. Free SO in oleum 3 When the concentration of the sulfuric acid is 65%, the concentration of the sulfuric acid is 114.65%. Alternatively, free SO in oleum 3 Is any one or a value between any two of 1%, 3%, 5%, 10%, 15%, 20%, 30%, 40%, 50%, 60% and 65%.
The polyarenyl oxadiazole and the poly-p-phenylene terephthalamide can be dissolved in concentrated sulfuric acid or fuming sulfuric acid, and form transparent and clear spinning solution, although a liquid crystal phase cannot be formed, spinning can still be carried out, in the spinning process, the rigid rod-shaped structure of the poly-p-phenylene terephthalamide has the effect of inducing the orientation of polyarenyl oxadiazole molecular chains, and the drafting multiple of the polyarenyl oxadiazole is effectively improved in the spinning process, so that the orientation degree of the polyarenyl oxadiazole fibers is improved, and the obtained co-spun fibers have higher strength.
Wherein the spinning solution may be prepared by a variety of preparation methods, in some embodiments the step of preparing the spinning solution comprises: a sulfuric acid solution of poly (paraphenylene terephthalamide) was mixed with polyareoxadiazole.
In other embodiments, the step of preparing the spinning solution comprises: a sulfuric acid solution of polyaromatic oxadiazole is mixed with poly (paraphenylene terephthalamide).
In other embodiments, the step of preparing the spinning solution comprises: the polyaromatic oxadiazole and the poly-p-phenylene terephthalamide are mixed together with concentrated sulfuric acid. For example, the polyarylene oxadiazole and the polyparaphenylene terephthalamide may be put into a dissolution vessel, and then dissolved by adding a sulfuric acid solution. The sulfuric acid solution may be added to a dissolution vessel, and then the polyarenyl oxadiazole and the poly (paraphenylene terephthalamide) may be added to the dissolution vessel together for dissolution.
The sulfuric acid solution in the above embodiments may be concentrated sulfuric acid or fuming sulfuric acid. The polyarylene oxadiazole and the polyparaphenylene terephthalamide may be in the form of particles or fibers before being dissolved in the sulfuric acid solution.
In some embodiments, the mass ratio of polyaromatic oxadiazole to poly paraphenylene terephthalamide in the spinning solution is 50-99:1-50. Illustratively, the mass ratio of polyaromatic oxadiazole to poly paraphenylene terephthalamide in the spinning solution is 99: 1. 9:1, 8:2, 7:3, 6:4, or 1:1.
In some embodiments, the mass ratio of polyaromatic oxadiazole to poly paraphenylene terephthalamide in the spinning solution is 5-9:1-5, 5-7:3-5, 6-8: 2-4 or 6-9: 1 to 4.
In some embodiments, the sum of the masses of the polyaromatic oxadiazole and the polyparaphenylene terephthalamide in the spinning solution is 5 to 12%, for example, a value between any one or any two of 5%, 8%, 10% and 12% of the mass of the spinning solution.
Further, the spinning solution may be wet spinning or dry-wet spinning, wherein dry-wet spinning is a spinning technology combining dry spinning with wet spinning.
Wherein, the wet spinning process comprises: solution defoaming, solution filtering, extruding a spinneret into a coagulating bath, drawing by a first drawing roller, drawing by a second drawing roller, drawing by a third drawing roller, neutralizing and washing by a water bath, drying, shaping, winding into a cylinder or packaging after cutting.
The dry-wet spinning process comprises the following steps: solution defoaming, solution filtering, extruding a spinneret into an air bath, entering a coagulating bath, drawing by a first drawing roller, drawing by a second drawing roller, drawing by a third drawing roller, neutralizing and washing by a water bath, drying, shaping, winding into a cylinder or cutting and packaging.
In one embodiment, the step of wet spinning the spinning solution comprises:
s1: standing and defoaming the spinning solution under the pressure of less than 1000 Pa;
s2: filtering the defoamed spinning solution by adopting a stainless steel metal sintered felt with the filtering precision of 20 mu m;
s3: and (3) introducing the filtered spinning solution into a spinneret, spraying a trickle through a spinneret orifice with the diameter of 0.07-0.10 mm, and entering a coagulating bath with the temperature of 20-60 ℃ to form a primary fiber. Wherein, the coagulating bath contains dilute sulfuric acid with the volume concentration less than or equal to 50 percent;
s4: drawing by using a first drawing roller with a drawing ratio of 0.6-1.5, a second drawing roller with a drawing ratio of 1.5-3.0 and a third drawing roller with a drawing ratio of 1-2 in sequence to obtain co-spinning fibers;
s5: washing the co-spun fibers by using sodium bicarbonate solution with the concentration of 5g/L as a neutralizing agent;
s6: drying the co-spun fibers at a temperature of 100-150 ℃;
s7: shaping the co-spun fibers at a temperature of 300-450 ℃;
s8: wound into a roll or cut and packaged.
In one embodiment, the step of dry-wet spinning the spinning solution comprises:
s1: standing and defoaming the spinning solution under the pressure of less than 1000 Pa;
s2: filtering the defoamed spinning solution by adopting a stainless steel metal sintered felt with the filtering precision of 10 mu m;
s3: and (3) introducing the filtered spinning solution into a spinneret, spraying trickles through spinneret holes with the length of 0.08-0.12 mm, entering an air bath with the length of 10-30 mm, and then entering a coagulating bath with the temperature of 20-60 ℃ to form the primary fibers. Wherein, the coagulating bath contains dilute sulfuric acid with the volume concentration less than or equal to 50 percent;
s4: drawing by using a first drawing roller with a drawing ratio of 1.5-4.5, a second drawing roller with a drawing ratio of 1.0-2.0 and a third drawing roller with a drawing ratio of 1.0-1.5 in sequence to obtain co-spinning fibers;
s5: washing the co-spun fibers by using sodium bicarbonate solution with the concentration of 5g/L as a neutralizing agent;
s6: drying the co-spun fibers at a temperature of 100-150 ℃;
s7: shaping the co-spun fibers at a temperature of 300-450 ℃;
s8: wound into a roll or cut and packaged.
The co-spun fibers of the present application and methods of making the same are described in further detail below in conjunction with the examples.
Example 1
The present embodiment provides a method for preparing a co-spun fiber, comprising:
(1) 9kg of polyaromatic oxadiazole and 1kg of poly (paraphenylene terephthalamide) were dissolved in 100kg of concentrated sulfuric acid (concentration 98%) to obtain a spinning solution;
(2) Standing and defoaming the spinning solution under the pressure of 800 Pa;
(3) Filtering the defoamed spinning solution by adopting a stainless steel metal sintered felt with the filtering precision of 20 mu m;
(4) The filtered spinning solution is fed into a spinneret, and a trickle is sprayed out through a spinneret orifice with the diameter of 0.10mm and enters a coagulating bath with the temperature of 50 ℃ to form nascent fibers. Wherein, the coagulating bath contains dilute sulfuric acid with the volume concentration of 40 percent;
(5) Drawing by sequentially utilizing a first drawing roller with a drawing ratio of 1, a second drawing roller with a drawing ratio of 1.5 and a third drawing roller with a drawing ratio of 2 to obtain co-spun fibers;
(6) Washing the co-spun fibers by using sodium bicarbonate solution with the concentration of 5g/L as a neutralizing agent;
(7) The co-spun fibers were dried at a temperature of 120 ℃.
Example 2
Example 2 provides a method for preparing a co-spun fiber, which differs from example 1 only in the quality of the polyaromatic oxadiazole and the poly-paraphenylene terephthalamide in the preparation step (1) of example 2, wherein the polyaromatic oxadiazole and the poly-paraphenylene terephthalamide in example 2 are 8kg and 2kg, respectively.
Example 3
Example 3 provides a method for preparing a co-spun fiber, which differs from example 1 only in the quality of the polyaromatic oxadiazole and the poly-paraphenylene terephthalamide in the preparation step (1) of example 3, wherein the polyaromatic oxadiazole and the poly-paraphenylene terephthalamide in example 3 are 7kg and 3kg, respectively.
Example 4
Example 4 provides a method of preparing a co-spun fiber, which differs from example 1 only in the quality of the polyaromatic oxadiazole and the poly-paraphenylene terephthalamide in the preparation step (1) of example 4, wherein the polyaromatic oxadiazole and the poly-paraphenylene terephthalamide in example 4 are 6kg and 4kg, respectively.
Example 5
Example 5 provides a method of preparing a co-spun fiber, which differs from example 1 only in the quality of the polyaromatic oxadiazole and the poly-paraphenylene terephthalamide in the preparation step (1) of example 5, wherein the polyaromatic oxadiazole and the poly-paraphenylene terephthalamide in example 5 are 5kg and 5kg, respectively.
Example 6
Example 6 provides a method of preparing a co-spun fiber, which differs from example 1 only in the quality of the polyaromatic oxadiazole and the poly-paraphenylene terephthalamide in the preparation step (1) of example 6, wherein the polyaromatic oxadiazole and the poly-paraphenylene terephthalamide in example 6 are 4kg and 6kg, respectively.
Example 7
Example 7 provides a method of preparing a co-spun fiber, which differs from example 1 only in the quality of the polyaromatic oxadiazole and the poly-paraphenylene terephthalamide in the preparation step (1) of example 7, wherein the polyaromatic oxadiazole and the poly-paraphenylene terephthalamide in example 7 are 2kg and 8kg, respectively.
Example 8
Example 8 provides a method for producing co-spun fibers, which differs from example 1 only in the mass of concentrated sulfuric acid in the production step (1) of example 8, wherein the mass of concentrated sulfuric acid in example 8 is 75kg.
Example 9
Example 9 provides a method for producing a co-spun fiber, which differs from example 1 only in the mass of concentrated sulfuric acid in the production step (1) of example 9, wherein the mass of concentrated sulfuric acid in example 9 is 190kg.
Comparative example 1
This comparative example provides a process for preparing a polyaromatic oxadiazole fiber comprising:
(1) 10kg of polyareoxadiazole was dissolved in 100kg of concentrated sulfuric acid (98% strength) to obtain a spinning solution;
(2) Standing and defoaming the spinning solution under the pressure of 800 Pa;
(3) Filtering the defoamed spinning solution by adopting a stainless steel metal sintered felt with the filtering precision of 20 mu m;
(4) The filtered spinning solution is fed into a spinneret, and a trickle is sprayed out through a spinneret orifice with the diameter of 0.10mm and enters a coagulating bath with the temperature of 50 ℃ to form nascent fibers. Wherein, the coagulating bath contains dilute sulfuric acid with the volume concentration of 40 percent;
(5) Sequentially using a first drafting roller with a drafting ratio of 1, a second drafting roller with a drafting ratio of 1.5 and a third drafting roller with a drafting ratio of 2 to draft to obtain the polyoxadiazole fiber;
(6) Washing the polyareoxadiazole fiber by adopting sodium bicarbonate solution with the concentration of 5g/L as a neutralizing agent;
(7) The polyaromatic oxadiazole fiber is dried at a temperature of 120 ℃.
Comparative example 2
This comparative example provides a method of making a poly (paraphenylene terephthalamide) fiber comprising:
(1) 25kg of poly (paraphenylene terephthalamide) was dissolved in 100kg of concentrated sulfuric acid (98% strength) to obtain a spinning solution;
(2) Standing and defoaming the spinning solution under the pressure of 800 Pa;
(3) Filtering the defoamed spinning solution by adopting a stainless steel metal sintered felt with the filtering precision of 20 mu m;
(4) The filtered spinning solution is fed into a spinneret, and a trickle is sprayed out through a spinneret orifice with the diameter of 0.10mm, and then the trickle is firstly fed into an air bath, and then fed into a coagulation bath with the temperature of 10 ℃ to form a primary fiber. Wherein, the coagulating bath contains dilute sulfuric acid with the volume concentration of 15 percent;
(5) Sequentially using a first drafting roller with a drafting ratio of 5, a second drafting roller with a drafting ratio of 1.1 and a third drafting roller with a drafting ratio of 1.05 to carry out drafting to obtain the para-poly (paraphenylene terephthalamide) fiber;
(6) Washing the poly (p-phenylene terephthalamide) fiber by adopting sodium bicarbonate solution with the concentration of 5g/L as a neutralizing agent;
(7) The poly (paraphenylene terephthalamide) fiber was dried at a temperature of 120 ℃.
Test examples
The co-spun fibers prepared in examples 1 to 9, the polyarylene oxadiazole fibers prepared in comparative example 1, and the polyparaphenylene terephthalamide fibers prepared in comparative example 2 were tested for breaking strength and elongation at break, and the results are recorded in table 1. Among them, the test standard of breaking strength and breaking elongation is referred to GB/T14337.
TABLE 1 results of Performance test of fibers
| Breaking strength/cN/dtex | Elongation at break/% | |
| Example 1 | 5.3 | 26.8 |
| Example 2 | 5.9 | 23.4 |
| Example 3 | 7.2 | 21.2 |
| Example 4 | 8.7 | 16.8 |
| Example 5 | 9.2 | 13.0 |
| Example 6 | 10.5 | 11.4 |
| Example 7 | 12.8 | 10.2 |
| Example 8 | 5.1 | 24.6 |
| Example 9 | 5.7 | 28.5 |
| Comparative example 1 | 4.1 | 32.3 |
| Comparative example 2 | 18.6 | 5.1 |
As can be seen from the results of Table 1, the co-spun fibers prepared in the examples of the present application have a significantly improved breaking strength as compared to the polyarylene oxadiazole fibers prepared in comparative example 1, and have a significantly improved elongation at break as compared to the polyphenylene terephthalamide fibers prepared in comparative example 2. The co-spun fiber prepared by the embodiment of the application has higher strength and elongation at break.
The above is only a specific embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. A co-spun fiber characterized in that the raw materials of the co-spun fiber comprise polyarenyl oxadiazole and poly-paraphenylene terephthalamide; the mass ratio of the polyaromatic oxadiazole to the poly (paraphenylene terephthalamide) is 5-9:1-5; the co-spun fibers are prepared by spinning a spinning solution, wherein the solvent in the spinning solution comprises concentrated sulfuric acid or fuming sulfuric acid.
2. The co-spun fiber of claim 1, wherein said co-spun fiber has a tenacity at break of 4.5 to 10.0cN/dtex and an elongation at break of 10.0 to 30.0%.
3. The co-spun fiber of claim 2, wherein said co-spun fiber has a tenacity at break of from 5.0 to 9.5cN/dtex and an elongation at break of from 13 to 27%.
4. A method of making a co-spun fiber comprising: spinning a spinning solution to obtain the co-spun fibers, wherein a solvent in the spinning solution comprises concentrated sulfuric acid or fuming sulfuric acid, and polyaromatic oxadiazole and polyparaphenylene terephthalamide are dissolved in the solvent; the mass ratio of the polyaromatic oxadiazole to the poly (paraphenylene terephthalamide) is 5-9:1-5.
5. The method of producing a co-spun fiber of claim 4, wherein the step of producing the spinning solution comprises: a sulfuric acid solution of poly (paraphenylene terephthalamide) is mixed with the polyaromatic oxadiazole.
6. The method of producing a co-spun fiber of claim 4, wherein the step of producing the spinning solution comprises: a sulfuric acid solution of polyaromatic oxadiazole is mixed with the poly (paraphenylene terephthalamide).
7. The method of producing a co-spun fiber of claim 4, wherein the step of producing the spinning solution comprises: mixing the polyaromatic oxadiazole and the poly-p-phenylene terephthalamide together with concentrated sulfuric acid.
8. The method for producing a co-spun fiber according to any one of claims 4 to 7, wherein the sum of the mass of the polyarylene oxadiazole and the polyparaphenylene diamine in the spinning solution is 5 to 12% of the mass of the spinning solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210102809.XA CN115247289B (en) | 2022-01-27 | 2022-01-27 | Co-spun fibers and method of making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210102809.XA CN115247289B (en) | 2022-01-27 | 2022-01-27 | Co-spun fibers and method of making same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115247289A CN115247289A (en) | 2022-10-28 |
| CN115247289B true CN115247289B (en) | 2023-09-22 |
Family
ID=83698414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210102809.XA Active CN115247289B (en) | 2022-01-27 | 2022-01-27 | Co-spun fibers and method of making same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115247289B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101735455A (en) * | 2008-11-14 | 2010-06-16 | 无锡华东创新材料研究院 | Method for preparing special aromatic polyoxadiazole and flame-retardant high-temperature resistant polyoxadiazole fiber thereof |
| CN106192551A (en) * | 2016-08-11 | 2016-12-07 | 江苏展宝新材料有限公司 | High-frequency circuit plate substrate prepared by a kind of poly-virtue diazole fibrous material |
| DE102016124608A1 (en) * | 2016-01-07 | 2017-07-13 | Coroplast Fritz Müller Gmbh & Co. Kg | High temperature and flame resistant colored adhesive tape, use of a carrier for its production and wiring harness with such an adhesive tape |
| CN109468729A (en) * | 2018-12-29 | 2019-03-15 | 江苏宝德新材料有限公司 | A kind of blended fabric containing poly- fragrant oxadiazoles fiber |
| CN111424353A (en) * | 2020-02-24 | 2020-07-17 | 山东宏业纺织股份有限公司 | Flame-retardant sewing thread and production process thereof |
| CN112501949A (en) * | 2020-11-23 | 2021-03-16 | 江苏展宝新材料有限公司 | Polyaryloxadiazole fiber basalt composite material and preparation method thereof |
| CN113373544A (en) * | 2021-06-29 | 2021-09-10 | 宁夏泰和芳纶纤维有限责任公司 | High-elongation para-aramid fiber and preparation method thereof |
-
2022
- 2022-01-27 CN CN202210102809.XA patent/CN115247289B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101735455A (en) * | 2008-11-14 | 2010-06-16 | 无锡华东创新材料研究院 | Method for preparing special aromatic polyoxadiazole and flame-retardant high-temperature resistant polyoxadiazole fiber thereof |
| DE102016124608A1 (en) * | 2016-01-07 | 2017-07-13 | Coroplast Fritz Müller Gmbh & Co. Kg | High temperature and flame resistant colored adhesive tape, use of a carrier for its production and wiring harness with such an adhesive tape |
| CN106192551A (en) * | 2016-08-11 | 2016-12-07 | 江苏展宝新材料有限公司 | High-frequency circuit plate substrate prepared by a kind of poly-virtue diazole fibrous material |
| CN109468729A (en) * | 2018-12-29 | 2019-03-15 | 江苏宝德新材料有限公司 | A kind of blended fabric containing poly- fragrant oxadiazoles fiber |
| CN111424353A (en) * | 2020-02-24 | 2020-07-17 | 山东宏业纺织股份有限公司 | Flame-retardant sewing thread and production process thereof |
| CN112501949A (en) * | 2020-11-23 | 2021-03-16 | 江苏展宝新材料有限公司 | Polyaryloxadiazole fiber basalt composite material and preparation method thereof |
| CN113373544A (en) * | 2021-06-29 | 2021-09-10 | 宁夏泰和芳纶纤维有限责任公司 | High-elongation para-aramid fiber and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115247289A (en) | 2022-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107313126B (en) | Method for producing graphene modified polyamide-6 fiber through high-speed spinning | |
| CN110565197B (en) | Preparation method of heterocyclic aramid 1313 fiber | |
| RU2534767C2 (en) | Fibre from completely aromatic metatype polyamide | |
| CN102926022A (en) | Preparation method for aromatic copolyamide fibers | |
| CN107675283B (en) | High-strength aromatic copolyamide fiber and preparation method thereof | |
| CN113321803A (en) | Modification method of heterocyclic aramid spinning solution, modified heterocyclic aramid spinning solution and application | |
| CN113529200A (en) | Preparation method of anti-cutting polyethylene fiber | |
| CN115247289B (en) | Co-spun fibers and method of making same | |
| CN113373544A (en) | High-elongation para-aramid fiber and preparation method thereof | |
| CN103014902B (en) | Polyimide fiber and preparation method thereof | |
| CN115704116B (en) | Method for manufacturing aromatic polysulfonamide fiber | |
| US11993867B2 (en) | Spun ABPBI fibers and process for preparing the same | |
| CN104195666B (en) | Method for preparing polyimide fibers based on imidization of o-methyl aryl amide | |
| KR101587048B1 (en) | Method of manufacturing copolymerized aramid fiber and copolymerized aramid fiber thereby | |
| CN114479070A (en) | Polyamide acid and polyimide fiber thereof and preparation method thereof | |
| JP2014070283A (en) | Method for manufacturing fully aromatic polyamide fiber | |
| CN112226842B (en) | High-strength high-elongation-at-break polyimide fiber and preparation method thereof | |
| JPH08509268A (en) | PPD-T fiber showing high elongation | |
| JPH08504007A (en) | Low denier polybenzazole fiber and method for producing the same | |
| CN115627555B (en) | Polybenzoxazole fiber containing benzimidazole structure and preparation method thereof | |
| CN115074868B (en) | Preparation method of pre-oxidized fiber and pre-oxidized fiber | |
| JP3565297B2 (en) | Method and apparatus for producing polybenzazole fiber | |
| CN111088535B (en) | Oiling method of low-silicon polyacrylonitrile protofilament | |
| KR102253139B1 (en) | Method of manufacturing aramid fiber with low denier | |
| CN110029405A (en) | A kind of preparation method of high uniformity p-aramid fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |