CN112160046A - Flame-retardant regenerated polyester chenille yarn - Google Patents
Flame-retardant regenerated polyester chenille yarn Download PDFInfo
- Publication number
- CN112160046A CN112160046A CN202011122045.8A CN202011122045A CN112160046A CN 112160046 A CN112160046 A CN 112160046A CN 202011122045 A CN202011122045 A CN 202011122045A CN 112160046 A CN112160046 A CN 112160046A
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- Prior art keywords
- yarn
- regenerated
- polyester
- chenille
- twisting
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- 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.)
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/42—Chenille threads
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
- D02G3/443—Heat-resistant, fireproof or flame-retardant yarns or threads
-
- 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
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
-
- 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
- D10B2401/063—Load-responsive characteristics high strength
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention relates to the technical field of yarns, and discloses a flame-retardant regenerated polyester chenille yarn which comprises a core wire, a down yarn, a polyester yarn and a fiber yarn, wherein the core wire is specifically a regenerated polyester plied yarn, the down yarn is specifically a regenerated polyester chenille yarn, the polyester yarn is specifically regenerated PET melt spinning, and the fiber yarn is specifically regenerated PET melt spinning. And performing Z twisting and S twisting on the feathered yarn and the core yarn alternately to prepare the regenerated polyester chenille yarn. The preparation method of the regenerated polyester chenille yarn comprises the steps of spinning a regenerated PET melt to prepare regenerated POY precursor yarn, and elasticizing the regenerated POY precursor yarn to prepare a regenerated DTY low-elasticity interlaced yarn; a method for preparing a regenerated polyester plied yarn. This fire-retardant regeneration dacron chenille yarn through the mode of dacron line and the non-uniform length intermittent type S twist of fibre yarn and heart yearn, under the prerequisite of the comfort level when guaranteeing the life of yarn, hygroscopicity and dress, has promoted the rupture strength and the toughness of yarn, makes it difficult rupture and damage.
Description
Technical Field
The invention relates to the technical field of yarns, in particular to a flame-retardant regenerated polyester chenille yarn.
Background
The chenille yarn is also called chenille yarn, and is a novel fancy yarn. It uses two strands of yarn as core yarn, and the feather yarn is sandwiched by twisting. The use of the chenille yarn gives the home textile fabric a thick feeling, and has the advantages of high quality and luxury, soft and plump hand feeling, good drapability and the like.
In the prior art, the core wire of the chenille yarn is feather yarn which is formed by using polyester yarn as a raw material and cutting viscose yarn into short feathers, and is widely applied to the field of home textiles and knitted clothes. The common chenille yarn fabric has decorative effect, but has poor flame retardant effect and can change after being washed, so the prior art needs to be improved to solve the problems
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the flame-retardant regenerated polyester chenille yarn which has the advantages of better flame-retardant effect and good toughness, and solves the problems of poorer flame-retardant effect and poor toughness.
(II) technical scheme
In order to achieve the purposes of better flame retardant effect and good toughness, the invention provides the following technical scheme: the core wire is specifically a regenerated polyester plied yarn, the down yarn is specifically a regenerated polyester chenille yarn, the polyester yarn is specifically regenerated PET melt spinning, and the fiber yarn is specifically regenerated PET melt spinning.
Preferably, the feathered yarn and the core yarn are alternately subjected to Z twisting and S twisting to prepare the regenerated polyester chenille yarn.
Preferably, the preparation method of the regenerated polyester chenille yarn comprises the steps of spinning a regenerated PET melt to prepare a regenerated POY protofilament, and texturing the regenerated POY protofilament to prepare a regenerated DTY low-elasticity interlaced yarn; the preparation method of the regenerated polyester plied yarn comprises the steps of spinning the regenerated PET melt to prepare regenerated polyester FDY filaments, and plying the regenerated polyester FDY filaments to prepare the regenerated polyester plied yarn. The method for stranding the regenerated DTY low-elasticity interlaced yarn and the regenerated polyester plied yarn comprises the following steps of:
step S1, spinning a semi-finished yarn by taking the regenerated DTY low-elasticity interlaced yarn as a down yarn and the regenerated polyester plied yarn as a core yarn;
and step S2, performing Z twisting and S twisting on the semi-finished yarn alternately to prepare the regenerated polyester chenille yarn. The method for preparing the regenerated POY protofilament by spinning the regenerated PET melt and preparing the regenerated POY protofilament into the regenerated DTY low-elasticity interlaced yarn by elasticizing comprises the following steps: the method comprises the following steps of sequentially carrying out melt filtration, homogenization, spinning, winding and texturing on a regenerated PET raw material, wherein the thickness range of a regenerated DTY low-stretch interlaced yarn is as follows: 160D to 280D, inclusive of the fiber number range: 50F to 280F. The method for preparing the regenerated polyester FDY filament yarns by spinning the regenerated PET melt and preparing the regenerated polyester FDY filament yarns into the regenerated polyester plied yarns by plying comprises the following steps: sequentially carrying out melt filtration, homogenization, spinning and stretching on a regenerated PET raw material, wherein the thickness range of a regenerated polyester FDY filament is as follows: 76D to 200D, inclusive of the fiber number range: 38F to 95F.
Preferably, the flame-retardant recycled polyester chenille yarn now provides a manufacturing device of the flame-retardant recycled polyester chenille yarn, which comprises an eccentric wheel, an eccentric sleeve is movably sleeved on the outer ring of the eccentric wheel, a driving rod is movably sleeved on the outer ring of the eccentric sleeve, the outer ring of the driving rod is movably sleeved with a limiting block, the top end of the driving rod is fixedly connected with a holding strip, a leather collar is movably connected between the two clamps of the holding strip, the inner ring of the leather collar is movably sleeved with a driving conical roller, the side end of the driving conical roller is movably connected with a driven conical roller, the top end of the axis of the driven conical roller is fixedly connected with a rotating roller, the outer ring of the rotating roller is provided with an auxiliary through hole, two sides of the rotating roller are movably connected with a twisting shaft, the axis position of the rotating roller is provided with a main through hole, the main wire is movably connected in the hole of the main through hole, and the auxiliary wire is movably connected in the hole of the auxiliary through hole.
Preferably, the limiting block, the driving conical roller and the driven conical roller are respectively fixedly connected and rotatably connected to a bearing back plate of the external equipment.
Preferably, when the main thread and the sub thread are respectively a core thread and a feather thread, a polyester thread and a fiber thread, the eccentric wheel does not rotate when the twisting shaft rotates, and when the main thread and the sub thread are respectively a regenerated polyester chenille thread and a finished product formed by alternately S-twisting the polyester thread and the fiber thread, the eccentric wheel works.
(III) advantageous effects
Compared with the prior art, the invention provides the flame-retardant regenerated polyester chenille yarn which has the following beneficial effects:
1. according to the flame-retardant regenerated polyester chenille yarn, Z twisting and S twisting are alternately carried out on the core wire and the core wire, so that the produced regenerated polyester chenille yarn achieves the effect of improving the flame retardant capability.
2. This fire-retardant regeneration dacron chenille yarn through the mode of dacron line and the non-uniform length intermittent type S twist of fibre yarn and heart yearn, under the prerequisite of the comfort level when guaranteeing the life of yarn, hygroscopicity and dress, has promoted the rupture strength and the toughness of yarn, makes it difficult rupture and damage.
Drawings
FIG. 1 is a schematic representation of the yarn structure of the present invention;
FIG. 2 is a schematic view of the rotating speed intermittent cyclic variation device of the rotating roller structure of the invention;
FIG. 3 is a schematic view showing the increased rotation speed of the driven conical roller structure according to the present invention;
FIG. 4 is a schematic side view of a clip strip configuration of the present invention;
FIG. 5 is a schematic view of a twist shaft structure according to the present invention.
In the figure: 1. an eccentric wheel; 2. an eccentric sleeve; 3. a driving lever; 4. a limiting block; 5. clamping strips; 6. a leather collar; 7. a driving conical roller; 8. a driven conical roller; 9. rotating the roller; 10. a secondary through hole; 11. twisting a shaft; 12. a main through hole; 13. a main line; 14. and (4) a secondary line.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, a flame retardant recycled polyester chenille yarn includes a core yarn, a down yarn, a polyester yarn and a fiber yarn, wherein: the core wire is specifically a regenerated polyester plied yarn, the down yarn is specifically a regenerated polyester chenille yarn, the polyester yarn is specifically regenerated PET melt spinning, and the fiber yarn is specifically regenerated PET melt spinning.
Wherein: and performing Z twisting and S twisting on the feathered yarn and the core yarn alternately to prepare the regenerated polyester chenille yarn.
Wherein: the preparation method of the regenerated polyester chenille yarn comprises the steps of spinning a regenerated PET melt to prepare regenerated POY precursor yarn, and elasticizing the regenerated POY precursor yarn to prepare a regenerated DTY low-elasticity interlaced yarn; the preparation method of the regenerated polyester plied yarn comprises the steps of spinning the regenerated PET melt to prepare regenerated polyester FDY filaments, and plying the regenerated polyester FDY filaments to prepare the regenerated polyester plied yarn. The method for stranding the regenerated DTY low-elasticity interlaced yarn and the regenerated polyester plied yarn comprises the following steps of:
step S1, spinning a semi-finished yarn by taking the regenerated DTY low-elasticity interlaced yarn as a down yarn and the regenerated polyester plied yarn as a core yarn;
and step S2, performing Z twisting and S twisting on the semi-finished yarn alternately to prepare the regenerated polyester chenille yarn. The method for preparing the regenerated POY protofilament by spinning the regenerated PET melt and preparing the regenerated POY protofilament into the regenerated DTY low-elasticity interlaced yarn by elasticizing comprises the following steps: the method comprises the following steps of sequentially carrying out melt filtration, homogenization, spinning, winding and texturing on a regenerated PET raw material, wherein the thickness range of a regenerated DTY low-stretch interlaced yarn is as follows: 160D to 280D, inclusive of the fiber number range: 50F to 280F. The method for preparing the regenerated polyester FDY filament yarns by spinning the regenerated PET melt and preparing the regenerated polyester FDY filament yarns into the regenerated polyester plied yarns by plying comprises the following steps: sequentially carrying out melt filtration, homogenization, spinning and stretching on a regenerated PET raw material, wherein the thickness range of a regenerated polyester FDY filament is as follows: 76D to 200D, inclusive of the fiber number range: 38F to 95F.
Wherein: and the terylene yarn and the fiber yarn are alternately subjected to S twisting, and then the terylene yarn and the fiber yarn are alternately subjected to S twisting at intervals of non-uniform length.
Wherein: according to the flame-retardant regenerated polyester chenille yarn, the manufacturing equipment of the flame-retardant regenerated polyester chenille yarn is provided, and comprises an eccentric wheel 1, an eccentric sleeve 2 is movably sleeved on the outer ring of the eccentric wheel, a driving rod 3 is movably sleeved on the outer ring of the eccentric sleeve 2, a limiting block 4 is movably sleeved on the outer ring of the driving rod 3, a clamping strip 5 is fixedly connected to the top end of the driving rod 3, a leather collar 6 is movably connected between two clamps of the clamping strip 5, a driving conical roller 7 is movably sleeved on the inner ring of the leather collar 6, a driven conical roller 8 is movably connected to the side end of the driving conical roller 7, a rotating roller 9 is fixedly connected to the top end of the axis of the driven conical roller 8, an auxiliary through hole 10 is formed in the outer ring of the rotating roller 9, twisting shafts 11 are movably connected to two sides of the rotating roller 9, a main through hole 12 is formed in the axis position of the rotating roller 9, a main wire 13 is movably connected to.
Wherein: the limiting block 4, the driving conical roller 7 and the driven conical roller 8 are respectively fixedly connected and rotatably connected to a bearing back plate of external equipment.
Wherein: when the main thread 13 and the sub thread 14 are respectively a core thread and a feather thread, a polyester thread and a fiber thread, the eccentric wheel 1 does not rotate when the twisting shaft 11 rotates, and when the main thread 13 and the sub thread 14 are respectively a regenerated polyester chenille thread and a finished product formed by alternately S-twisting the polyester thread and the fiber thread, the eccentric wheel 1 works.
The working principle is as follows: the output end of an external motor is connected to the axis of the eccentric wheel 1, and drives the eccentric wheel 1 to rotate, and under the transmission of the eccentric sleeve 2, the driving rod 3 is driven to do intermittent and uniform reciprocating motion under the limiting action of the limiting block 4, and simultaneously the leather collar 6 is driven to synchronously move through the holding strip 5. The driving conical roller 7 and the driven conical roller 8 are driven by the leather collar 6, and as can be seen from comparing fig. 2 and 3, the leather collar 6 is positioned at the smaller rotating radius of the driving conical roller 7, meanwhile, the part with larger rotating radius of the driven conical roller 8 is connected, the rotating angular speed of the driven conical roller 8 is higher, otherwise, the rotation is slower, the rotating speed of the reciprocating roller is driven to continuously and intermittently change in the reciprocating process, at the moment, the rotating speed of the rotating roller 9 synchronously changes, the main line 13 penetrates through the main through hole 12 through the transmission of the twisting shaft 11 and moves forwards, the secondary line 14 is wound on the outer ring of the main line 13 through the secondary through hole 10 and the constantly rotating roller 9, so as to fulfill the purpose of non-uniform twisting among the core wires, the feathers, the polyester yarns and the fiber yarns, and the state can be seen from figure 1, the feathers at the inner ring are twisted uniformly, and the polyester yarns and the fiber yarns at the outer ring are twisted non-uniformly but intermittently fixed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a fire-retardant regeneration dacron chenille yarn, includes heart yearn, feather yarn, dacron line and fibre yarn, its characterized in that: the core wire is specifically a regenerated polyester plied yarn, the down yarn is specifically a regenerated polyester chenille yarn, the polyester yarn is specifically regenerated PET melt spinning, and the fiber yarn is specifically regenerated PET melt spinning.
2. The flame-retardant recycled polyester chenille yarn as claimed in claim 1, characterized in that: and the feathered yarns and the core yarns are subjected to Z twisting and S twisting alternately to prepare the regenerated polyester chenille yarns.
3. The flame-retardant recycled polyester chenille yarn as claimed in claim 2, characterized in that: the preparation method of the regenerated polyester chenille yarn comprises the steps of spinning a regenerated PET melt to prepare regenerated POY precursor yarn, and elasticizing the regenerated POY precursor yarn to prepare a regenerated DTY low-elasticity interlaced yarn; the preparation method of the regenerated polyester plied yarn, namely, the regenerated PET melt spinning is made into regenerated polyester FDY filament yarns, the regenerated polyester FDY filament yarns are twisted to make the regenerated polyester plied yarn, and the method for twisting the regenerated DTY low-elastic interlaced yarn and the regenerated polyester plied yarn comprises the following steps:
step S1, spinning a semi-finished yarn by taking the regenerated DTY low-elasticity interlaced yarn as a down yarn and the regenerated polyester plied yarn as a core yarn;
step S2, the semi-finished yarn is alternately subjected to Z twisting and S twisting to prepare a regenerated polyester chenille yarn, the regenerated PET melt is spun to prepare a regenerated POY protofilament, and the regenerated POY protofilament is elasticated to prepare a regenerated DTY low-elasticity interlaced yarn, wherein the method comprises the following steps: the method comprises the following steps of sequentially carrying out melt filtration, homogenization, spinning, winding and texturing on a regenerated PET raw material, wherein the thickness range of a regenerated DTY low-stretch interlaced yarn is as follows: 160D to 280D, inclusive of the fiber number range: 50F-280F, the method for preparing the regenerated polyester FDY filament by spinning the regenerated PET melt and preparing the regenerated polyester FDY filament into the regenerated polyester plied yarn by plying comprises the following steps: sequentially carrying out melt filtration, homogenization, spinning and stretching on a regenerated PET raw material, wherein the thickness range of a regenerated polyester FDY filament is as follows: 76D to 200D, inclusive of the fiber number range: 38F to 95F.
4. The flame-retardant recycled polyester chenille yarn as claimed in claim 1, characterized in that: and the terylene yarn and the fiber yarn are alternately subjected to S twisting, and then the terylene yarn and the fiber yarn are alternately subjected to S twisting at intervals of non-uniform length.
5. The flame-retardant recycled polyester chenille yarn as claimed in claim 1, which provides a manufacturing device of the flame-retardant recycled polyester chenille yarn, comprising an eccentric wheel (1), characterized in that: an eccentric sleeve (2) is movably sleeved on the outer ring of the eccentric wheel (1), a driving rod (3) is movably sleeved on the outer ring of the eccentric sleeve (2), a limiting block (4) is movably sleeved on the outer ring of the driving rod (3), a clamping strip (5) is fixedly connected to the top end of the driving rod (3), a leather collar (6) is movably connected between two clamps of the clamping strip (5), a driving conical roller (7) is movably sleeved on the inner ring of the leather collar (6), a driven conical roller (8) is movably connected to the side end of the driving conical roller (7), a rotating roller (9) is fixedly connected to the top end of the axis of the driven conical roller (8), an auxiliary through hole (10) is formed in the outer ring of the rotating roller (9), a twisting shaft (11) is movably connected to two sides of the rotating roller (9), a main through hole (12) is formed in the axis position of the rotating roller (9), and a main line (13) is movably connected to the, and an auxiliary line (14) is movably connected in the hole of the auxiliary through hole (10).
6. The manufacturing equipment of the flame-retardant recycled polyester chenille yarn as claimed in claim 5, wherein: the limiting block (4), the driving conical roller (7) and the driven conical roller (8) are respectively and fixedly connected and rotatably connected to a bearing back plate of external equipment.
7. The manufacturing equipment of the flame-retardant recycled polyester chenille yarn as claimed in claim 5, wherein: when the main thread (13) and the auxiliary thread (14) are respectively a core thread and a feather yarn, a polyester thread and a fiber yarn, the eccentric wheel (1) does not rotate when the twisting shaft (11) rotates, and when the main thread (13) and the auxiliary thread (14) are respectively a finished product formed by alternately S-twisting a regenerated polyester chenille yarn, the polyester thread and the fiber yarn, the eccentric wheel (1) works.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011122045.8A CN112160046A (en) | 2020-10-20 | 2020-10-20 | Flame-retardant regenerated polyester chenille yarn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011122045.8A CN112160046A (en) | 2020-10-20 | 2020-10-20 | Flame-retardant regenerated polyester chenille yarn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112160046A true CN112160046A (en) | 2021-01-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011122045.8A Withdrawn CN112160046A (en) | 2020-10-20 | 2020-10-20 | Flame-retardant regenerated polyester chenille yarn |
Country Status (1)
| Country | Link |
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| CN (1) | CN112160046A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142168B (en) * | 2022-01-07 | 2023-08-01 | 桐昆集团浙江恒通化纤有限公司 | Production method and device of special DTY (draw textured yarn) fiber for special chenille yarns |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03180530A (en) * | 1989-12-08 | 1991-08-06 | Kuraray Co Ltd | Chenille yarn |
| CN2672095Y (en) * | 2004-01-09 | 2005-01-19 | 上海纺织机械总厂 | Conic belt wheel speed regulator |
| CN101619513A (en) * | 2009-08-13 | 2010-01-06 | 南通新源特种纤维有限公司 | Three-dimensional space positioning lead supporting arm for twisting machine |
| CN105463652A (en) * | 2016-01-26 | 2016-04-06 | 江苏优越纺织科技有限公司 | Recycled polyester chenille yarn, manufacturing method thereof and method for manufacturing recycled polyester chenille yarn blanket |
| CN209412403U (en) * | 2018-12-13 | 2019-09-20 | 浙江力达现代纺织有限公司 | A kind of fire-retardant regenerated terylene chenille yarn |
| CN210657291U (en) * | 2019-09-04 | 2020-06-02 | 天津市圣地芬网业有限公司 | Twisting frame of weaving usefulness |
-
2020
- 2020-10-20 CN CN202011122045.8A patent/CN112160046A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03180530A (en) * | 1989-12-08 | 1991-08-06 | Kuraray Co Ltd | Chenille yarn |
| CN2672095Y (en) * | 2004-01-09 | 2005-01-19 | 上海纺织机械总厂 | Conic belt wheel speed regulator |
| CN101619513A (en) * | 2009-08-13 | 2010-01-06 | 南通新源特种纤维有限公司 | Three-dimensional space positioning lead supporting arm for twisting machine |
| CN105463652A (en) * | 2016-01-26 | 2016-04-06 | 江苏优越纺织科技有限公司 | Recycled polyester chenille yarn, manufacturing method thereof and method for manufacturing recycled polyester chenille yarn blanket |
| CN209412403U (en) * | 2018-12-13 | 2019-09-20 | 浙江力达现代纺织有限公司 | A kind of fire-retardant regenerated terylene chenille yarn |
| CN210657291U (en) * | 2019-09-04 | 2020-06-02 | 天津市圣地芬网业有限公司 | Twisting frame of weaving usefulness |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142168B (en) * | 2022-01-07 | 2023-08-01 | 桐昆集团浙江恒通化纤有限公司 | Production method and device of special DTY (draw textured yarn) fiber for special chenille yarns |
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