CN114351268A - Preparation method of flame-retardant anti-dripping polyester-nylon composite fiber - Google Patents
Preparation method of flame-retardant anti-dripping polyester-nylon composite fiber Download PDFInfo
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- CN114351268A CN114351268A CN202210011860.XA CN202210011860A CN114351268A CN 114351268 A CN114351268 A CN 114351268A CN 202210011860 A CN202210011860 A CN 202210011860A CN 114351268 A CN114351268 A CN 114351268A
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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
- D01D4/00—Spinnerette packs; Cleaning thereof
- D01D4/08—Supporting spinnerettes or other parts of spinnerette packs
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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
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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
- D01D5/20—Formation of filaments, threads, or the like with varying denier along their length
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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
- D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
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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
- 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
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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
- 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
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
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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)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
- Multicomponent Fibers (AREA)
Abstract
The invention discloses a preparation method of a flame-retardant anti-dripping polyester-nylon composite fiber, and belongs to the field of fiber preparation. A preparation method of flame-retardant anti-dripping polyester-nylon composite fiber comprises the following steps: s1, uniformly mixing the polyester slices, the silicon resin, the hydroxyphenoxy phosphine propionic acid and the antimony trioxide according to a certain proportion, adding the mixture into a screw extruder, and carrying out melt extrusion to obtain a polyester melt; s2, uniformly mixing nylon chips, tetramethylolglycoluril and 4-hydroxymethyl phosphorus sulfate according to a certain ratio, adding into a screw extruder, and carrying out melt extrusion to obtain a nylon melt; s3, adjusting the aperture size of a spinneret orifice on a spinneret plate in advance through an adjusting cylinder; and S4, conveying the polyester melt and the polyamide melt into a spinning box, mixing, spraying through a spinneret orifice on a spinneret plate, and cooling to obtain the flame-retardant anti-dripping polyester-polyamide composite fiber finished product with the required thickness.
Description
Technical Field
The invention relates to the field of fiber preparation, in particular to a preparation method of a flame-retardant anti-dripping polyester-nylon composite fiber.
Background
Because the synthetic fiber has low limiting oxygen index and is easy to burn, the fire caused by the flammability of the synthetic fiber poses serious threat to the safety of people's lives and properties every year. Flame retardant research on synthetic fibers has long been a global concern. Adding flame retardant to synthetic fibers to impart flame retardancy is an effective solution to the flammability problem of synthetic fibers. Much work has been done in research and development of flame retardant synthetic fibers both domestically and abroad since the last 70 s and many have been commercially produced.
The combustion process of the polyester-nylon composite fiber is that the polyester-nylon composite fiber is heated and melted firstly, and the phenomenon of dropping of a melt is generated during combustion, so that a fire source is transferred to other media, and a larger fire is caused, and therefore, the flame retardance and the anti-dripping modification of the polyester fiber are particularly important; meanwhile, the polyester-nylon composite fibers comprise coarse denier composite fibers and fine denier composite fibers, and when the composite fibers with different thicknesses are prepared, spinneret plates with spinneret holes of different diameters need to be replaced, so that the replacement operation is troublesome, and the waste of resource cost is easily caused.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a preparation method of flame-retardant anti-dripping polyester-nylon composite fiber, which can realize better flame-retardant anti-dripping effect of the polyester-nylon composite fiber, can be widely applied to places with high fireproof safety requirements, and can be suitable for preparing the polyester-nylon composite fibers with different thicknesses according to requirements.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A preparation method of flame-retardant anti-dripping polyester-nylon composite fiber comprises the following steps:
s1, uniformly mixing the polyester slices, the silicon resin, the hydroxyphenoxy phosphine propionic acid and the antimony trioxide according to a certain proportion, adding the mixture into a screw extruder, and carrying out melt extrusion to obtain a polyester melt;
s2, uniformly mixing nylon chips, tetramethylolglycoluril and 4-hydroxymethyl phosphorus sulfate according to a certain ratio, adding into a screw extruder, and carrying out melt extrusion to obtain a nylon melt;
s3, adjusting the aperture size of a spinneret orifice on a spinneret plate in advance through an adjusting cylinder;
and S4, conveying the polyester melt and the polyamide melt into a spinning box, mixing, spraying through a spinneret orifice on a spinneret plate, and cooling to obtain the flame-retardant anti-dripping polyester-polyamide composite fiber finished product with the required thickness.
Further, the polyester chips, the silicon resin, the hydroxyphenoxy phosphino propionic acid and the antimony trioxide are respectively 70-90 parts, 15-20 parts, 30-35 parts and 1-5 parts by weight.
Further, the weight parts of the nylon chips, the tetramethylol glycoluril and the 4-hydroxymethyl phosphonium sulfate are respectively 70-80 parts, 25-30 parts and 10-15 parts.
Further, the spinneret plate is arranged in the spinning box body, the adjusting cylinder is in threaded connection with the outer wall of the spinneret plate, a plurality of penetrating annular through holes are formed in the bottom wall of the adjusting cylinder, and the annular through holes and the adjusting cylinder share the same axis; a variable diameter part is fixedly arranged in the spinneret hole, and a limiting part is arranged at one end of the variable diameter part outside the spinneret hole; a connecting structure is arranged in the annular through hole, and the limiting part slides on the connecting structure.
Furthermore, the connecting structure comprises two annular fixing plates and a plurality of connecting plates fixedly arranged between the two annular fixing plates; the two annular fixing plates are respectively fixed on the inner walls at the two sides of the bottom of the annular through hole; the connecting plate is close to the reducing part.
Furthermore, spacing portion includes two arc limiting plates about reducing portion symmetric distribution, and arc limiting plate lower extreme contacts with the annular fixed plate upper end.
Furthermore, the diameter changing part comprises a connecting pipe and a deformation pipe; the upper end of the connecting pipe is detachably connected in the spinneret orifice, and the lower end of the connecting pipe extends to the lower side of the spinneret orifice and is fixed with the deformation pipe; the arc limiting plate is fixedly arranged on the outer wall of the bottom of the deformation pipe, the lower end face of the deformation pipe is flush with the upper end face of the annular fixing plate, and the lower end face of the deformation pipe is flush with the upper end face of the connecting plate or higher than the upper end face of the connecting plate.
Furthermore, the connecting pipe is made of hard materials, the deformation pipe is made of elastic materials, the middle part of the deformation pipe is provided with a break point, and the upper part and the lower part of the deformation pipe deform relative to the middle break point when the deformation pipe is subjected to extrusion force in the vertical direction.
Furthermore, the connecting structure comprises two annular fixing plates and a plurality of connecting plates; the two annular fixing plates are respectively fixed on the inner walls of two sides of the bottom of the annular through hole and are positioned at the lower side of the connecting plate; one end of the connecting plate is rotationally connected with the inner wall of one side of the annular through hole, and the other end of the connecting plate is rotationally connected with the inner wall of the other side of the annular through hole; and at most one connecting plate is arranged between every two adjacent variable-diameter parts.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
the scheme can realize better flame-retardant anti-dripping effect of the polyester-nylon composite fiber, can be widely applied to places with high fireproof safety requirements, and can be used for preparing the polyester-nylon composite fibers with different thicknesses according to the requirements.
(II) through the rotation connected mode between connecting plate and the annular through-hole inner wall, can realize on the one hand that the connection to a multistage adjusting cylinder is fixed, and on the other hand adjusting cylinder pivoted in-process, the connecting plate is all the time in the export top of deformation pipe, is difficult for causing the hindrance to the normal unloading of deformation pipe, and the fuse-element is difficult for drippage on the connecting plate.
And (III) the deformation pipe is driven to be folded and deformed by the upward movement operation of the adjusting cylinder, and the larger the upward movement distance of the adjusting cylinder is, the larger the folding deformation of the deformation pipe is, and the smaller the aperture for extruding the mixed melt is.
And (IV) through the mode of threaded connection between the adjusting cylinder and the spinneret plate, the adjusting cylinder can be moved to any position and can be fixed, and the extrusion deformation degree of the deformation pipe can be judged through the number of turns of the thread of the adjusting cylinder.
And (V) through the fixed connection between the connecting plate and the annular fixing plate, on one hand, the connection and fixation of the multi-section adjusting cylinder can be realized, and on the other hand, the relative rotation between the variable-diameter part and the adjusting cylinder is not easily influenced.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is an exploded view of example 1 of the present invention;
fig. 3 is a schematic cross-sectional structure view of a spinneret, a diameter-variable portion, and an adjusting cylinder portion according to embodiment 1 of the present invention;
fig. 4 is a schematic cross-sectional structure view of a diameter-variable portion and an adjustment cylinder portion in embodiment 1 of the present invention;
fig. 5 is a schematic structural view of a diameter-variable portion and a stopper portion in embodiment 1 of the present invention;
FIG. 6 is a schematic structural view showing a deformation tube of example 1 of the present invention deformed by a pressing force;
fig. 7 is a schematic view of a connection structure between the connection plate and the adjustment cylinder according to embodiment 2 of the present invention.
The reference numbers in the figures illustrate:
1 spinneret plate and 1-1 spinneret orifice;
2, adjusting cylinder and 2-1 annular through hole;
3-1 annular fixed plate and 3-2 connecting plate;
4-diameter-variable parts, 4-1 connecting pipes and 4-2 deformation pipes;
and 5, a limiting part.
Detailed Description
Example 1:
please refer to fig. 1-6, which is a method for preparing a flame retardant anti-dripping polyester-nylon composite fiber, comprising the following steps:
s1, uniformly mixing the polyester slices, the silicon resin, the hydroxyphenoxy phosphine propionic acid and the antimony trioxide according to a certain proportion, adding the mixture into a screw extruder, and carrying out melt extrusion to obtain a polyester melt;
s2, uniformly mixing nylon chips, tetramethylolglycoluril and 4-hydroxymethyl phosphorus sulfate according to a certain ratio, adding into a screw extruder, and carrying out melt extrusion to obtain a nylon melt;
s3, adjusting the aperture size of a spinneret orifice 1-1 on the spinneret plate 1 through an adjusting cylinder 2 in advance;
s4, conveying the polyester melt and the nylon melt into a spinning box, mixing, spraying through a spinneret orifice 1-1 on a spinneret plate 1, and cooling to obtain the flame-retardant anti-dripping polyester-nylon composite fiber finished product with the required thickness.
The polyester chips, the silicon resin, the hydroxyphenoxy phosphino propionic acid and the antimony trioxide are respectively 70-90 parts, 15-20 parts, 30-35 parts and 1-5 parts by weight; specifically, the polyester chips, the silicon resin, the hydroxyphenoxy phosphino propionic acid and the antimony trioxide are respectively 80 parts, 15 parts, 30 parts and 5 parts by weight; the addition of the silicon resin and the hydroxyphenoxy phosphino propionic acid enables the polyester melt to have flame-retardant and anti-dripping performance, and the addition of the antimony trioxide enables effective components among the polyester chips, the silicon resin and the hydroxyphenoxy phosphino propionic acid to be fully exerted.
The nylon melt has the flame-retardant and anti-dripping performance through the addition of the tetrahydroxymethyl glycoluril and the 4-hydroxymethyl phosphorus sulfate.
The spinneret plate 1 is arranged in the spinning box body, the adjusting cylinder 2 is in threaded connection with the outer wall of the spinneret plate 1, the bottom wall of the adjusting cylinder 2 is provided with a plurality of penetrating annular through holes 2-1, and the annular through holes 2-1 and the adjusting cylinder 2 share the same axis; a variable diameter part 4 is fixedly arranged in the spinneret orifice 1-1, and a limiting part 5 is arranged at one end of the variable diameter part 4, which is positioned outside the spinneret orifice 1-1; a connecting structure is arranged in the annular through hole 2-1, and the limiting part 5 slides on the connecting structure.
The connecting structure comprises two annular fixing plates 3-1 and a plurality of connecting plates 3-2 fixedly arranged between the two annular fixing plates 3-1; the two annular fixing plates 3-1 are respectively fixedly arranged on the inner walls of the two sides of the bottom of the annular through hole 2-1; the connecting plate 3-2 is close to the reducing part 4, and the proper distance between the connecting plate 3-2 and the reducing part 4 is set, so that when the adjusting cylinder 2 rotates clockwise relative to the spinneret plate 1 to the maximum, the adjacent reducing part 4 of the reducing part 4 close to the connecting plate 3-2 still does not rotate to the position of the connecting plate 3-2, and the connecting plate 3-2 is not easy to obstruct the blanking of the reducing part 4.
The limiting part 5 comprises two arc limiting plates which are symmetrically distributed about the diameter changing part 4, the lower ends of the arc limiting plates are in contact with the upper ends of the annular fixing plates 3-1, when the adjusting cylinder 2 rotates relative to the spinneret plate 1, the annular fixing plates 3-1 rotate relative to the arc limiting plates, meanwhile, the annular fixing plates 3-1 generate upward displacement along with the rotation of the adjusting cylinder 2, and the annular fixing plates 3-1 move upward to drive the arc limiting parts to move upward.
The variable diameter part 4 comprises a connecting pipe 4-1 and a deformation pipe 4-2; the upper end of the connecting pipe 4-1 is detachably connected in the spinneret orifice 1-1, the connecting pipe 4-1 is in threaded connection with the spinneret orifice 1-1, and the lower end of the connecting pipe 4-1 extends to the lower side of the spinneret orifice 1-1 and is fixed with the deformation pipe 4-2; the arc limiting plate is fixedly arranged on the outer wall of the bottom of the deformation pipe 4-2, the lower end face of the deformation pipe 4-2 is flush with the upper end face of the annular fixing plate 3-1, and the lower end face of the deformation pipe 4-2 is flush with the upper end face of the connecting plate 3-2 or higher than the upper end face of the connecting plate 3-2.
The connecting pipe 4-1 is made of hard materials, the deformation pipe 4-2 is made of elastic materials, the deformation pipe 4-2 is of a straight pipe-shaped structure, a break point is arranged in the middle of the deformation pipe 4-2, the upper portion and the lower portion of the deformation pipe 4-2 deform relative to the middle break point when extrusion force in the vertical direction is applied, and after the adjusting cylinder 2 drives the annular fixing plate 3-1 to move upwards to drive the limiting portion 5 to drive the deformation pipe 4-2 to deform and move upwards, the deformation pipe 4-2 can be restored to the original straight pipe-shaped structure under the elastic force action of the deformation pipe 4-2 when the original position is restored.
When the extrusion diameter of the mixed melt is adjusted, the adjusting barrel 2 is rotated clockwise, the adjusting barrel 2 gradually moves upwards relative to the spinneret plate 1, the limiting part 5 is driven to move upwards in the process that the adjusting barrel 2 moves upwards, the top of the connecting pipe 4-1 is fixed, therefore, the limiting part 5 can extrude the deformation pipe 4-2 when moving upwards, the upper part and the lower part of the deformation pipe 4-2 begin to deform towards the middle break point, the inner diameter of the deformation pipe 4-2 at the middle break point is reduced, the number of turns of the clockwise rotation of the adjusting barrel 2 is controlled according to the thickness of the composite fiber which is required to be manufactured, and then the inner diameter of the middle break point of the deformation pipe 4-2 is controlled, so that the composite fiber with the proper thickness can be extruded by the inner diameter.
Example 2:
referring to fig. 7, the connecting structure includes two annular fixing plates 3-1 and a plurality of connecting plates 3-2; the two annular fixing plates 3-1 are respectively fixedly arranged on the inner walls of the two sides of the bottom of the annular through hole 2-1, and the annular fixing plate 3-1 is positioned at the lower side of the connecting plate 3-2; one end of the connecting plate 3-2 is rotatably connected with the inner wall of one side of the annular through hole 2-1, and the other end of the connecting plate 3-2 is rotatably connected with the inner wall of the other side of the annular through hole 2-1; at most one connecting plate 3-2 is arranged between every two adjacent variable diameter parts 4; in the rotation process of the adjusting cylinder 2, the deformation pipe 4-2 is in contact with the connecting plate 3-2 to drive the connecting plate 3-2 to slide on the inner wall of the annular through hole 2-1, and the connecting plate 3-2 not only realizes the fixation of the adjusting cylinder 2, but also is not easy to influence the movement of the deformation pipe 4-2 in the annular through hole 2-1.
Through the rotation connection mode between the connecting plate 3-2 and the inner wall of the annular through hole 2-1, on one hand, the connection fixation of the multi-section adjusting cylinder 2 can be realized, and on the other hand, in the rotation process of the adjusting cylinder 2, the connecting plate 3-2 is always above the outlet of the deformation pipe 4-2, so that the normal blanking of the deformation pipe 4-2 is not easily hindered, and the melt is not easily dropped on the connecting plate 3-2.
Claims (9)
1. A preparation method of flame-retardant anti-dripping polyester-nylon composite fiber is characterized by comprising the following steps: the method comprises the following steps:
s1, uniformly mixing the polyester slices, the silicon resin, the hydroxyphenoxy phosphine propionic acid and the antimony trioxide according to a certain proportion, adding the mixture into a screw extruder, and carrying out melt extrusion to obtain a polyester melt;
s2, uniformly mixing nylon chips, tetramethylolglycoluril and 4-hydroxymethyl phosphorus sulfate according to a certain ratio, adding into a screw extruder, and carrying out melt extrusion to obtain a nylon melt;
s3, adjusting the aperture size of a spinneret orifice (1-1) on a spinneret plate (1) through an adjusting cylinder (2) in advance;
s4, conveying the polyester melt and the nylon melt into a spinning box, mixing, spraying out through a spinneret orifice (1-1) on a spinneret plate (1), and cooling to obtain the flame-retardant anti-dripping polyester-nylon composite fiber finished product with the required thickness.
2. The preparation method of the flame-retardant anti-dripping polyester-nylon composite fiber according to claim 1, which is characterized by comprising the following steps of: the polyester chips, the silicon resin, the hydroxyphenoxy phosphino propionic acid and the antimony trioxide are respectively 70-90 parts, 15-20 parts, 30-35 parts and 1-5 parts by weight.
3. The preparation method of the flame-retardant anti-dripping polyester-nylon composite fiber according to claim 1, which is characterized by comprising the following steps of: the polyamide chips, the tetramethylol glycoluril and the 4-hydroxymethyl phosphonium sulfate are respectively 70-80 parts, 25-30 parts and 10-15 parts by weight.
4. The preparation method of the flame-retardant anti-dripping polyester-nylon composite fiber according to claim 1, which is characterized by comprising the following steps of: the spinneret plate (1) is arranged in the spinning box body, the adjusting cylinder (2) is in threaded connection with the outer wall of the spinneret plate (1), the bottom wall of the adjusting cylinder (2) is provided with a plurality of penetrating annular through holes (2-1), and the annular through holes (2-1) and the adjusting cylinder (2) share the same axis;
a variable-diameter part (4) is fixedly arranged in the spinneret orifice (1-1), and a limiting part (5) is arranged at one end of the variable-diameter part (4) positioned outside the spinneret orifice (1-1);
a connecting structure is arranged in the annular through hole (2-1), and the limiting part (5) slides on the connecting structure.
5. The preparation method of the flame-retardant anti-dripping polyester-nylon composite fiber according to claim 4, characterized by comprising the following steps: the connecting structure comprises two annular fixing plates (3-1) and a plurality of connecting plates (3-2) fixedly arranged between the two annular fixing plates (3-1);
the two annular fixing plates (3-1) are respectively fixed on the inner walls of the two sides of the bottom of the annular through hole (2-1);
the connecting plate (3-2) is close to the diameter-variable part (4).
6. The preparation method of the flame-retardant anti-dripping polyester-nylon composite fiber according to claim 4, characterized by comprising the following steps: the limiting part (5) comprises two arc limiting plates which are symmetrically distributed about the variable-diameter part (4), and the lower ends of the arc limiting plates are in contact with the upper end of the annular fixing plate (3-1).
7. The preparation method of the flame-retardant anti-dripping polyester-nylon composite fiber according to claim 6, characterized by comprising the following steps: the variable diameter part (4) comprises a connecting pipe (4-1) and a deformation pipe (4-2);
the upper end of the connecting pipe (4-1) is detachably connected in the spinneret orifice (1-1), and the lower end of the connecting pipe (4-1) extends to the lower side of the spinneret orifice (1-1) and is fixed with the deformation pipe (4-2);
the arc limiting plate is fixedly arranged on the outer wall of the bottom of the deformation pipe (4-2), the lower end face of the deformation pipe (4-2) is flush with the upper end face of the annular fixing plate (3-1), and the lower end face of the deformation pipe (4-2) is flush with the upper end face of the connecting plate (3-2) or higher than the upper end face of the connecting plate (3-2).
8. The preparation method of the flame-retardant anti-dripping polyester-nylon composite fiber according to claim 7, characterized by comprising the following steps: the connecting pipe (4-1) is made of hard materials, the deformation pipe (4-2) is made of elastic materials, a folding point is arranged in the middle of the deformation pipe (4-2), and the upper portion and the lower portion of the deformation pipe (4-2) deform relative to the middle folding point when the deformation pipe is extruded in the vertical direction.
9. The preparation method of the flame-retardant anti-dripping polyester-nylon composite fiber according to claim 4, characterized by comprising the following steps: the connecting structure comprises two annular fixing plates (3-1) and a plurality of connecting plates (3-2);
the two annular fixing plates (3-1) are respectively fixed on the inner walls of the two sides of the bottom of the annular through hole (2-1), and the annular fixing plates (3-1) are positioned at the lower side of the connecting plate (3-2);
one end of the connecting plate (3-2) is rotationally connected with the inner wall of one side of the annular through hole (2-1), and the other end of the connecting plate (3-2) is rotationally connected with the inner wall of the other side of the annular through hole (2-1);
at most one connecting plate (3-2) is arranged between every two adjacent variable-diameter parts (4).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210011860.XA CN114351268B (en) | 2022-01-06 | 2022-01-06 | Preparation method of flame-retardant anti-dripping polyester-nylon composite fiber |
| PCT/CN2022/072976 WO2023130512A1 (en) | 2022-01-06 | 2022-01-20 | Preparation method for flame-retardant drip resistant polyester-nylon composite fiber |
| JP2022568582A JP7454138B2 (en) | 2022-01-06 | 2022-01-20 | Method for producing flame retardant and anti-drip nylon/polyester composite fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210011860.XA CN114351268B (en) | 2022-01-06 | 2022-01-06 | Preparation method of flame-retardant anti-dripping polyester-nylon composite fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114351268A true CN114351268A (en) | 2022-04-15 |
| CN114351268B CN114351268B (en) | 2023-02-28 |
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| CN202210011860.XA Active CN114351268B (en) | 2022-01-06 | 2022-01-06 | Preparation method of flame-retardant anti-dripping polyester-nylon composite fiber |
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| JP (1) | JP7454138B2 (en) |
| CN (1) | CN114351268B (en) |
| WO (1) | WO2023130512A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024125512A1 (en) * | 2022-12-13 | 2024-06-20 | 上海榕融新材料技术有限公司 | Multi-row blowing device and method for assisting in forming of continuous alumina fiber blanket |
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| JP7454138B2 (en) | 2024-03-22 |
| JP2024509338A (en) | 2024-03-01 |
| WO2023130512A1 (en) | 2023-07-13 |
| CN114351268B (en) | 2023-02-28 |
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