CN113373535A - Preparation process of PET/PTT bi-component stretch yarn - Google Patents
Preparation process of PET/PTT bi-component stretch yarn Download PDFInfo
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- CN113373535A CN113373535A CN202110720585.4A CN202110720585A CN113373535A CN 113373535 A CN113373535 A CN 113373535A CN 202110720585 A CN202110720585 A CN 202110720585A CN 113373535 A CN113373535 A CN 113373535A
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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
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
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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
- D01D5/084—Heating filaments, threads or the like, leaving the spinnerettes
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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
- D01D5/098—Melt spinning methods with simultaneous stretching
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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
- D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
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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
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
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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
- D01D5/26—Formation of staple fibres
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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
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/34—Core-skin structure; Spinnerette packs therefor
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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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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/061—Load-responsive characteristics elastic
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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)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention discloses a preparation process of PET/PTT bi-component stretch yarn, which comprises the following steps in sequence: firstly, extruding PTT slices into an auxiliary box body through a screw extruder A after solid-phase tackifying treatment and drying treatment; extruding the PET slices into a main box body through a screw extruder B after pre-crystallization treatment and drying treatment; thirdly, the PTT melt in the auxiliary box body and the PET melt in the main box body are converged in a spinning jet through a PTT metering pump and a PET metering pump respectively and sprayed out to form a composite silk thread; when the PTT and the PET are sprayed out, a third melt is synchronously sprayed out between the PTT and the PET to form a reinforcing silk thread clamped between the PTT silk thread and the PET silk thread; fourthly, the composite silk thread forms a curled elastic structure through drafting treatment and heat treatment; the prepared PET/PTT bi-component elastic yarn has stronger strength and elasticity, better supporting force and wider application range, and the prepared filament yarn has the temperature regulating function and is warm in winter and cool in summer; the prepared staple fibers have extremely light weight, high strength and heat insulation and preservation capability.
Description
Technical Field
The invention belongs to the technical field of fiber material preparation devices, and particularly relates to a preparation process of PET/PTT bi-component stretch yarn.
Background
Currently, common polyester fibers gradually saturate in the market due to low added value and high homogeneity degree, and research and development of differentiated polyester fibers such as self-crimping fibers are increasingly important. The crimped fiber is in permanent crimp appearance through physical and mechanical action of a fiber crimp generating device, while the self-crimped fiber does not need special crimp treatment, only needs drawing and heat treatment to develop potential crimp, and can remarkably reduce the processing cost of the fiber. The side-by-side polyethylene terephthalate (PET)/polytrimethylene terephthalate (PTT) makes use of the larger thermal shrinkage performance difference between the PET component and the PTT component to make the longitudinal direction of the fiber present a three-dimensional spiral curled structure. The large extensibility and the high elastic recovery rate derived from the high crimp enable the fiber to have the potential of replacing conventional elastic fibers such as spandex and the like, can be used for weaving of elastic fabrics with woven and knitted structures, and compared with spandex or ammonia brocade wrapping yarns, the fiber has the advantages of low raw material cost, melt spinning realization, high production efficiency, good elasticity durability, chlorine rinsing resistance, aging resistance and the like, so the fiber becomes a development hotspot in recent years.
The existing PET/PTT bi-component stretch yarn process is not broken through, the application range of the prepared stretch yarn is close to stagnation, the pressure-bearing capacity of the prepared stretch yarn is not strong, a large amount of extrusion filling is needed if the proper pressure-bearing capacity is ensured by filling short yarns, the product cost is improved, and the application range is limited.
Disclosure of Invention
In order to solve the problems, the invention provides a preparation process of PET/PTT bi-component comfortable and elastic yarn, the PET/PTT bi-component comfortable and elastic yarn prepared by the process has stronger strength and comfortable elasticity, better supporting force and wider application range, and the prepared filament yarn has the temperature regulating function and is warm in winter and cool in summer; the prepared staple fibers have extremely light weight, high strength and heat insulation and preservation capability.
The technical scheme adopted by the invention is as follows:
the preparation process of the PET/PTT bi-component stretch yarn comprises the following steps in sequence:
firstly, extruding PTT slices into an auxiliary box body through a screw extruder A after solid-phase tackifying treatment and drying treatment;
extruding the PET slices into a main box body through a screw extruder B after pre-crystallization treatment and drying treatment;
thirdly, the PTT melt in the auxiliary box body and the PET melt in the main box body are converged in a spinning jet through a PTT metering pump and a PET metering pump respectively and sprayed out to form a composite silk thread;
and fourthly, forming a curled elastic structure by the composite silk thread through drafting treatment and heat treatment.
And in the third step, when the PTT and the PET are sprayed out, a third melt is synchronously sprayed out between the PTT and the PET to form a reinforcing silk thread clamped between the PTT silk thread and the PET silk thread.
The diameter of the reinforcing silk threads is smaller than the height of a combined surface of the PTT silk threads and the PET silk threads, so that the PET silk threads and the PTT silk threads are simultaneously coated with the reinforcing silk threads.
The reinforcing thread comprises the components of aromatic polyamide fiber, polyphenylene sulfide microfiber, rubber polycondensate blend elastic fiber, aramid fiber and polyether amine acetate elastic fiber or gel.
Wherein the reinforcing thread is gel thread without drying treatment in a filament state.
Wherein the gel silk is silica nanofiber-based elastic gel or cellulose nanofibril gel.
The spinneret holes of the spinneret in the step three are provided with Y-shaped flow guide channels; two inflow ports of the Y-shaped diversion channel are respectively pressed and extruded into the PET melt and the PTT melt, and an extrusion needle is arranged between the two inflow ports; the extrusion needle extrudes gel fluid, and the PET melt and the PTT melt are converged and sprayed out at the outlet of the Y-shaped flow guide channel.
Wherein the composite yarn is cut into short yarns after the drawing treatment in the step (iv) or after the heat treatment, and is dried to release the solvent in the gel; the gel after the solvent is released forms an elastic aerogel.
Wherein, the drying treatment of the PTT slices and the PET slices adopts a vacuum drum drying process, the drying temperature of the PET slices is 150-160 ℃, and the drying time is 15-19 h; the drying temperature of the PTT slices is 120-135 ℃, and the drying time is 15-19 h.
The solid-phase tackifying process of the step I comprises the following steps: the temperature of the pre-crystallization stage is 150-160 ℃, and the time is 4-5 min; the temperature of the crystallization stage is 190-210 ℃, and the time is 50-65 min; the temperature of the preheating stage is 190-210 ℃, and the time is 30-40 min; the temperature of the reaction stage is 200-220 ℃, and the reaction time is 12-13 h; the temperature of the cooling stage is 50-60 ℃ and the time is 22-24 h.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the PET/PTT bi-component stretch yarn prepared by the process has stronger strength and elasticity, better supporting force and wider application range, and the prepared filament yarn has the temperature regulating function and is warm in winter and cool in summer; the prepared staple fibers have extremely light weight, high strength and heat insulation and preservation capability.
2. The invention utilizes different thermodynamic properties and different shrinkage properties of PET and PTT, and the fibers form a compact crimp shape similar to sheep capillary under the action of internal stress after heat treatment or drafting so as to have good elasticity and bulkiness.
3. According to the process, the reinforcing silk threads are introduced between the PTT silk threads and the PET silk threads, so that on one hand, the overall strength of the composite silk threads can be increased, and on the other hand, the bonding area of the PTT silk threads and the PET silk threads can be enlarged as a medium, so that the bonding strength of the overall composite silk threads is improved; in addition, the reinforcing silk threads are made of gel materials which can be converted into elastic aerogel, so that certain supporting capacity is provided while the tensile capacity of the composite silk threads is not influenced, the partial crimping capacity is reduced, but the compression resistance after crimping is improved, and the composite silk threads have stronger supporting performance; in the filament state, because the gel is coated by PTT and PET, the solvent locked in the gel is not easy to leak and volatilize, so that the filament, especially the clothes or fabrics prepared by the filament have larger specific heat capacity than common clothes, have good temperature regulation capability, are warm in winter and cool in summer, and have wide markets no matter clothes, carpets, curtains, fabrics and the like are prepared; in the short silk state, the solvent in the gel is easy to release due to the fact that the solvent in the gel has a release channel, so that the solvent in the gel is volatilized under the drying process and is replaced by air, the aerogel is formed, and the formed aerogel is the aerogel with good elasticity, so that the elasticity of the short silk, particularly the elasticity of down jackets, pillows, throw pillows, sofas, mattresses, quilts and the like filled with the short silk is not influenced, the elasticity and the supporting force can be improved, and the elastic fiber has better comfortable elasticity and contact feeling under the condition of less using amount compared with common elastic fibers, is stronger in pressure resistance and better in restoring force; meanwhile, because of the super-strong heat insulation property of the aerogel, the filled and prepared clothes or articles have strong heat insulation property and wide application.
Drawings
FIG. 1 is a schematic process diagram of the present invention;
FIG. 2 is a schematic structural view of a spinneret according to the present invention;
fig. 3 is a schematic cross-sectional view of a composite wire of the present invention.
The labels in the figure are: 1. an auxiliary box body; 2. a main box body; 3. a PTT metering pump; 4. a PET metering pump; 5. PTT silk thread; 6. PET silk thread; 7. a reinforcing thread; 8. a Y-shaped flow guide channel; 9. a flow inlet; 10. the needle is extruded.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 3: the preparation process of the PET/PTT bi-component stretch yarn comprises the following steps in sequence:
firstly, extruding PTT slices into an auxiliary box body 1 through a screw extruder A after solid-phase tackifying treatment and drying treatment;
secondly, extruding the PET slices into the main box body 2 through a screw extruder B after pre-crystallization treatment and drying treatment;
thirdly, the PTT melt in the auxiliary box body 1 and the PET melt in the main box body 2 are converged in a spinning jet through a PTT metering pump 3 and a PET metering pump 4 respectively and are sprayed out to form a composite silk thread;
and fourthly, forming a curled elastic structure by the composite silk thread through drafting treatment and heat treatment.
By utilizing the different heat shrinkage rates of PET and PTT, the parallel composite bicomponent fiber which has self-crimping capability and can provide excellent elasticity is obtained through parallel composite spinning. The difference in thermal shrinkage of the two components is released during post-processing to produce a permanent two-dimensional helical crimp. The higher shrinkage is on the inside of the helix and the lower shrinkage is on the outside of the helix.
Further, in the third step, when the PTT and the PET are sprayed, a third melt is synchronously sprayed between the PTT and the PET to form a reinforcing thread 7 clamped between the PTT thread 5 and the PET thread 6.
Furthermore, the diameter of the reinforcing thread 7 is smaller than the height of the combined surface of the PTT thread 5 and the PET thread 6, so that the PET thread 6 and the PTT thread 5 simultaneously wrap the reinforcing thread 7.
Further, the reinforcing thread 7 is composed of aromatic polyamide fiber, polyphenylene sulfide microfiber, rubber polycondensate blend elastic fiber, aramid fiber, polyether amine acetate elastic fiber or gel.
Further, the reinforcing thread 7 is a gel thread without drying treatment in a filament state.
The reinforcing silk threads are introduced between the PTT silk threads 5 and the PET silk threads 6, so that on one hand, the overall strength of the composite silk threads can be increased, and on the other hand, the bonding area of the PTT silk threads 5 and the PET silk threads 6 can be enlarged as a medium, so that the bonding strength of the overall composite silk threads is improved; in addition, the reinforcing wires 7 are made of gel materials which can be converted into elastic aerogel, so that certain supporting capacity is provided while the tensile capacity of the composite wires is not influenced, and although the partial crimping capacity is reduced, the compression resistance after crimping is improved, so that the composite wires have stronger supporting performance; in the filament state, the gel is coated by PTT and PET, so that the solvent locked in the gel is not easy to leak and volatilize, and the filament, especially clothes or fabrics prepared from the filament have larger specific heat capacity than common clothes, have good temperature regulation capability, are warm in winter and cool in summer, and have wide markets for preparing clothes, carpets, curtains, fabrics and the like.
Further, the gel silk is silica nanofiber-based elastic gel or cellulose nanofibril gel.
Furthermore, the spinneret holes of the spinneret in the step three are provided with Y-shaped flow guide channels 8; two inlets 9 of the Y-shaped flow guide channel 8 are respectively pressed and extruded into PET and PTT melts, and an extrusion needle 10 is arranged between the two inlets 9; the extrusion needle 10 extrudes gel fluid, and the PET melt and the PTT melt are converged and sprayed out at the outlet of the Y-shaped flow guide channel 8.
Further, cutting the composite yarn into short yarns after the drawing treatment of the step (iv) or after the heat treatment, and performing a drying treatment to release the solvent in the gel; the gel after the solvent is released forms an elastic aerogel. In the short silk state, the solvent in the gel is easy to release due to the fact that the solvent in the gel has a release channel, the solvent in the gel is volatilized under the drying process and is replaced by air, and therefore aerogel is formed, the formed aerogel is aerogel with good elasticity, the elasticity of the short silk, particularly the elasticity of down jackets, pillows, throw pillows, sofas, mattresses, quilts and the like filled with the short silk cannot be affected, the elasticity and the supporting force can be improved, and compared with common elastic soft silk, the elastic soft silk has better comfortable elasticity and contact feeling under the condition of less using amount, the compression resistance is stronger, and the restoring force is better; meanwhile, because of the super-strong heat insulation property of the aerogel, the filled and prepared clothes or articles have strong heat insulation property and wide application.
Further, drying the PTT slices and the PET slices by adopting a vacuum drum drying process, wherein the drying temperature of the PET slices is 150-160 ℃, and the drying time is 15-19 h; the drying temperature of the PTT slices is 120-135 ℃, and the drying time is 15-19 h.
Further, the solid-phase tackifying process of the step I comprises the following steps: the temperature of the pre-crystallization stage is 150-160 ℃, and the time is 4-5 min; the temperature of the crystallization stage is 190-210 ℃, and the time is 50-65 min; the temperature of the preheating stage is 190-210 ℃, and the time is 30-40 min; the temperature of the reaction stage is 200-220 ℃, and the reaction time is 12-13 h; the temperature of the cooling stage is 50-60 ℃ and the time is 22-24 h.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
- The preparation process of the PET/PTT bi-component stretch yarn is characterized by comprising the following steps: comprises the following steps which are carried out in sequence:firstly, extruding PTT slices into an auxiliary box body (1) through a screw extruder A after solid-phase tackifying treatment and drying treatment are carried out on the PTT slices;secondly, extruding the PET slices into a main box body (2) through a screw extruder B after pre-crystallization treatment and drying treatment;thirdly, the PTT melt in the auxiliary box body (1) and the PET melt in the main box body (2) are converged in a spinning jet through a PTT metering pump (3) and a PET metering pump (4) respectively and are sprayed out to form a composite silk thread;and fourthly, forming a curled elastic structure by the composite silk thread through drafting treatment and heat treatment.
- 2. The process for preparing PET/PTT bi-component lycra filament as claimed in claim 1, wherein: and step three, when the PTT and the PET are sprayed out, a third melt is synchronously sprayed out between the PTT and the PET to form a reinforcing silk thread (7) clamped between the PTT silk thread (5) and the PET silk thread (6).
- 3. The process for preparing PET/PTT bi-component lycra filament as claimed in claim 2, wherein: the diameter of the reinforcing silk threads (7) is smaller than the height of the combined surface of the PTT silk threads (5) and the PET silk threads (6), so that the PET silk threads (6) and the PTT silk threads (5) are simultaneously coated with the reinforcing silk threads (7).
- 4. The process for preparing PET/PTT bi-component lycra filament as claimed in claim 3, wherein: the components of the reinforcing thread (7) are aromatic polyamide fiber, polyphenylene sulfide microfiber, rubber polycondensate blend elastic fiber, aramid fiber and polyether amine acetate elastic fiber or gel.
- 5. The process for preparing PET/PTT bi-component lycra filament as claimed in claim 4, wherein: the reinforcing threads (7) are gel threads which have not been dried in the filament state.
- 6. The process for preparing PET/PTT bi-component lycra filament as claimed in claim 5, wherein: the gel silk is silica nanofiber-based elastic gel or cellulose nanofibril gel.
- 7. The process for preparing PET/PTT bi-component lycra filament as claimed in claim 5, wherein: the spinneret holes of the spinneret in the step three are provided with Y-shaped flow guide channels (8); two flow inlets (9) of the Y-shaped flow guide channel (8) are respectively pressed and extruded into the PET melt and the PTT melt, and an extrusion needle (10) is arranged between the two flow inlets (9); the extrusion needle (10) extrudes gel fluid, and the PET melt and the PTT melt are converged and sprayed out at the outlet of the Y-shaped flow guide channel (8).
- 8. The process for preparing PET/PTT bi-component lycra filament as claimed in claim 6, wherein: cutting the composite yarn into short yarns after the drawing treatment of the step (iv) or after the heat treatment, and performing a drying treatment to release the solvent in the gel; the gel after the solvent is released forms an elastic aerogel.
- 9. The process for preparing PET/PTT bi-component lycra filament as claimed in claim 1, wherein: drying the PTT slices and the PET slices by adopting a vacuum drum drying process, wherein the drying temperature of the PET slices is 150-160 ℃, and the drying time is 15-19 h; the drying temperature of the PTT slices is 120-135 ℃, and the drying time is 15-19 h.
- 10. The process for preparing PET/PTT bi-component lycra filament as claimed in claim 1, wherein: the solid-phase tackifying process of the step I comprises the following steps: the temperature of the pre-crystallization stage is 150-160 ℃, and the time is 4-5 min; the temperature of the crystallization stage is 190-210 ℃, and the time is 50-65 min; the temperature of the preheating stage is 190-210 ℃, and the time is 30-40 min; the temperature of the reaction stage is 200-220 ℃, and the reaction time is 12-13 h; the temperature of the cooling stage is 50-60 ℃ and the time is 22-24 h.
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| CN202110720585.4A CN113373535A (en) | 2021-06-28 | 2021-06-28 | Preparation process of PET/PTT bi-component stretch yarn |
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| CN202110720585.4A CN113373535A (en) | 2021-06-28 | 2021-06-28 | Preparation process of PET/PTT bi-component stretch yarn |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114908437A (en) * | 2022-05-20 | 2022-08-16 | 常熟市海立复合材料有限公司 | Moisture-conductive quick-drying self-crimping elastic fiber and preparation method and application thereof |
| CN115341288A (en) * | 2022-08-10 | 2022-11-15 | 仪征威英化纤有限公司 | Short-process full-regeneration foam spinning process |
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