CN108166122A - The bifilar sewing thread of single multifilament and its manufacturing method with drawn expanded performance - Google Patents
The bifilar sewing thread of single multifilament and its manufacturing method with drawn expanded performance Download PDFInfo
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- CN108166122A CN108166122A CN201810129402.XA CN201810129402A CN108166122A CN 108166122 A CN108166122 A CN 108166122A CN 201810129402 A CN201810129402 A CN 201810129402A CN 108166122 A CN108166122 A CN 108166122A
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- Prior art keywords
- multifilament
- elastic force
- monofilament
- sewing thread
- bifilar
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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
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
- D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
-
- 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
- D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
- D02G3/328—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic containing elastane
-
- 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
- D02G3/46—Sewing-cottons or the like
-
- 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
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/04—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of halogenated hydrocarbons
- D10B2321/041—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of halogenated hydrocarbons polyvinyl chloride or polyvinylidene chloride
-
- 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
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
-
- 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
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/10—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyurethanes
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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 bifilar sewing thread of single multifilament with drawn expanded performance, including multifilament, the elastic force monofilament mutually kinked, multifilament, elastic force monofilament are in parallel construction between each other, multifilament is made for FDY filament, multifilament, elastic force monofilament are wavy shaped configuration, and the diameter of multifilament is the 75% -125% of elastic force filament diameter, and the intensity of multifilament is more than elastic force monofilament, the flexibility of multifilament is less than elastic force monofilament, and the Poisson's ratio of single bifilar sewing thread of multifilament is less than 0 and is more than or equal to 0.5.The design not only has drawn expanded performance, can be gone out by actual fabrication, can carry out large-scale production, and sutures product not easy glide, and no filoplume sutures conducive to puncture, and intensity is high, is suitble to sewing at a high speed.
Description
Technical field
The present invention relates to a kind of sewing threads, belong to field of textiles more particularly to a kind of list with drawn expanded performance is answered
The bifilar sewing thread of silk and its manufacturing method, it is particularly applicable to will be provided with the sewing thread actual fabrication of drawn expanded performance to go out, and energy
It accomplishes scale production.
Background technology
Sewing thread is the suture material in fabrics for industrial use processing, the effects that playing suture, connection, reinforce.Sewing thread matter
The quality of amount not only influences sewing efficiency and processing cost, also influences the stable structure and presentation quality of suture product.Industry is stitched
Line of threading is generally divided into natural fiber sewing thread, synthetic fibers sewing thread and mixing sewing thread three categories by raw material.In sewing, need
Want sewing thread frictional resistance small, it is soft；After it has been gathered, need product secured, sewing thread does not slide.
Poisson ratio material refer to when material is acted on by the tensile load of a direction the extension strain that generates and perpendicular to
The ratio between contraction strain of draw direction.Under normal circumstances, when most material is stretched, the Poisson ratio measured is all
One positive value, and negative poisson's ratio（Negative Poisson’s Ratio）Phenomenon is then completely on the contrary, when material is in a direction
On be stretched load effect when, expansion can be generated to a certain extent instead on the direction perpendicular to drawing force.It is negative
The simple definition of Poisson's ratio yarn is：During by axial tension external force effect, diameter increased yarn instead.Negative poisson's ratio yarn
Design although have existed, but be limited to its form and composition material, at present, just material object for, there is no negative poisson's ratio structure
Yarn gone out by actual fabrication, be not more put into production with carry out scale making.
The information for disclosing the background technology part is merely intended to increase the understanding to the general background of present patent application, without
It should be considered as recognizing or imply that information composition has been the existing skill well known to persons skilled in the art in any form
Art.
Invention content
The purpose of the present invention is overcome in the prior art by actual fabrication not gone out, can not carry out large-scale production
The defects of and problem, provide it is a kind of can be gone out by actual fabrication, can carry out large-scale production there is drawn expanded performance
The bifilar sewing thread of single multifilament and its manufacturing method.
In order to achieve the above object, the technical solution of the present invention is：A kind of single multifilament with drawn expanded performance is double
Stock sewing thread；The list multifilament bifilar sewing thread includes the multifilament, the elastic force monofilament that mutually kink, multifilament, elastic force monofilament mutually it
Between in parallel construction, and multifilament is made for FDY filament；The multifilament, elastic force monofilament are wavy shaped configuration, multifilament it is straight
Diameter is the 75% -125% of elastic force filament diameter, and the intensity of multifilament is more than elastic force monofilament, and the flexibility of multifilament is less than elastic force monofilament；Institute
The Poisson's ratio for stating the bifilar sewing thread of single multifilament is less than 0 more than or equal to -0.5.
The diameter of the multifilament is the 100% of elastic force filament diameter.
The fracture strength of the FDY filament is 5.2 cN/dtex -12.0 cN/dtex, and elongation at break is 7% -23%.
The FDY filament is FDY polyester filament or FDY polyamide filaments.
The elongation at break of the elastic force monofilament is 300% -600%, and elastic recovery rate is 85% -95%.
The elastic force monofilament is elastic polyurethane fiber monofilament or PVC elastic force monofilament.
A kind of manufacturing method of the above-mentioned bifilar sewing thread of single multifilament with drawn expanded performance, the manufacturing method include
Following steps：
Multifilament, elastic force monofilament are first obtained respectively, then by multifilament, elastic force monofilament simultaneously by doubling frame so that multifilament, elastic force monofilament
It mutually kinks as primary sewing thread, high-temperature shaping is then carried out to primary sewing thread to obtain the bifilar sewing of single multifilament
Line.
After multifilament, elastic force monofilament is obtained, winding procedure first is carried out to multifilament, elastic force monofilament to obtain multifilament cylinder respectively
Son, monofilament bobbin, then by multifilament bobbin, monofilament bobbin on doubling frame, then by answering on multifilament bobbin, monofilament bobbin
Silk, elastic force monofilament are simultaneously by doubling frame so that multifilament, elastic force monofilament are mutually kinked as primary sewing thread；To multifilament, elastic force
While monofilament carries out winding procedure, multifilament, elastic force monofilament are checked using yarn cleaning device, and removes and has an impact to quality
Fault and impurity.
The acquisition multifilament refers to：First by selected FDY filament by boundling and wire process to obtain non-twist multifilament, then will
Non-twist multifilament by twisted filament process to increase the twist of 5T/10cm -30T/10cm, so as to obtain multifilament；The FDY filament
Fracture strength is 5.2 cN/dtex -12.0 cN/dtex, and elongation at break is 7% -23%.
The acquisition elastic force monofilament refers to：Selected elongation at break is 300% -600%, and elastic recovery rate is 85% -95%
Elastic polyurethane fiber monofilament or PVC elastic force monofilament.
Compared with prior art, beneficial effects of the present invention are：
1st, the present invention has in the bifilar sewing thread of single multifilament and its manufacturing method of drawn expanded performance, single bifilar sewing thread of multifilament
Including multifilament, the elastic force monofilament mutually kinked, between each other in parallel construction, multifilament makes for FDY filament for multifilament, elastic force monofilament
It forming, multifilament, elastic force monofilament are wavy shaped configuration, and the diameter of multifilament is the 75% -125% of elastic force filament diameter, during making,
Multifilament, elastic force monofilament diameter be not much different, the twist contraction that generates is basically identical during twisting side by side so that the sewing thread twist of formation
Stablize, so as to put into actual production using twisted construction arranged side by side, carry out scale making, be readily produced and apply, apply
When, since the intensity of multifilament is more than elastic force monofilament, the flexibility of multifilament is less than elastic force monofilament, when sewing thread is in an axial direction by force-extension
When, multifilament is tightened, and forms sandwich layer yarn, and the multifilament that elastic force monofilament can then be stretched squeezes and buckling, forms yarn helix winding
Outside multifilament, fasciated yarn is formed, at this point, before the diameter of sewing thread is more than and stretches, therefore it is with drawn expanded performance.Cause
This, the present invention can not only be gone out by actual fabrication, and can carry out large-scale production.
2nd, the present invention has in the bifilar sewing thread of single multifilament and its manufacturing method of drawn expanded performance, single bifilar seam of multifilament
Line of threading is not only negative poisson's ratio yarn, has drawn expanded performance, moreover, single bifilar sewing thread of multifilament is by multifilament, elastic force monofilament
It is made, multifilament, elastic force monofilament are made of filament fiber, and advantage includes：First, drawn expanded performance causes using the sewing
The product not easy glide that linear slit closes；Secondly, the characteristics of being made of filament fiber has so that final sewing thread does not have filoplume
Intensity is high, item does the advantages of uniform, twist is stablized, and is sutured conducive to puncturing；Again, the intensity of multifilament is high, and sewing at a high speed is suitble to add
Work, suture fastness are high, especially suitable for geotextiles-ocean super thick mould bag（＞ 60cm）Sewing when：Both it can ensure that suture is held
Easily, it also can guarantee the suture fastness of mould bag, while when high pressure cement is perfused, due to drawn expanded, mould bag will not generate seam
The variation of displacement of the lines of threading and suture stitching.Therefore, the present invention not only has drawn expanded performance, sutures product not easy glide, and
And it without filoplume, is sutured conducive to puncturing, intensity is high, is suitble to sew at a high speed, is particularly suitable for the seam of geotextiles-ocean super thick mould bag
System.
3rd, the present invention have drawn expanded performance the bifilar sewing thread of single multifilament and its manufacturing method in, realize multifilament,
When kinking of elastic force monofilament both can directly be realized by doubling frame, can also first undergo winding procedure respectively and be fabricated to multifilament
Bobbin, monofilament bobbin, then by multifilament bobbin, monofilament bobbin docked, produced with doubling frame, it is more sharp to improve working efficiency
It is suitable for scale production in input practical operation.Therefore, the present invention can not only be gone out by actual fabrication, and can be into professional etiquette
Modelling produces.
Description of the drawings
Fig. 1 is the structure diagram of the bifilar sewing thread of single multifilament before the stretching in the present invention.
Fig. 2 is the structure diagram of the bifilar sewing thread of single multifilament after the stretch in the present invention.
Specific embodiment
Below in conjunction with description of the drawings, the present invention is described in further detail with specific embodiment.
Referring to Fig. 1 to Fig. 2, a kind of bifilar sewing thread of single multifilament with drawn expanded performance；The bifilar seam of the list multifilament
Line of threading includes the multifilament, the elastic force monofilament that mutually kink, and multifilament, elastic force monofilament are between each other in parallel construction, and multifilament is FDY long
Silk is made；The multifilament, elastic force monofilament are wavy shaped configuration, the diameter of multifilament be elastic force filament diameter 75%-
125%, the intensity of multifilament is more than elastic force monofilament, and the flexibility of multifilament is less than elastic force monofilament；The Poisson of the bifilar sewing thread of the list multifilament
It is more than or equal to -0.5 than being less than 0.
The diameter of the multifilament is the 100% of elastic force filament diameter.
The fracture strength of the FDY filament is 5.2 cN/dtex -12.0 cN/dtex, and elongation at break is 7% -23%.
The FDY filament is FDY polyester filament or FDY polyamide filaments.
The elongation at break of the elastic force monofilament is 300% -600%, and elastic recovery rate is 85% -95%.
The elastic force monofilament is elastic polyurethane fiber monofilament or PVC elastic force monofilament.
A kind of manufacturing method of the above-mentioned bifilar sewing thread of single multifilament with drawn expanded performance, the manufacturing method include
Following steps：
Multifilament, elastic force monofilament are first obtained respectively, then by multifilament, elastic force monofilament simultaneously by doubling frame so that multifilament, elastic force monofilament
It mutually kinks as primary sewing thread, high-temperature shaping is then carried out to primary sewing thread to obtain the bifilar sewing of single multifilament
Line.
After multifilament, elastic force monofilament is obtained, winding procedure first is carried out to multifilament, elastic force monofilament to obtain multifilament cylinder respectively
Son, monofilament bobbin, then by multifilament bobbin, monofilament bobbin on doubling frame, then by answering on multifilament bobbin, monofilament bobbin
Silk, elastic force monofilament are simultaneously by doubling frame so that multifilament, elastic force monofilament are mutually kinked as primary sewing thread；To multifilament, elastic force
While monofilament carries out winding procedure, multifilament, elastic force monofilament are checked using yarn cleaning device, and removes and has an impact to quality
Fault and impurity.
The acquisition multifilament refers to：First by selected FDY filament by boundling and wire process to obtain non-twist multifilament, then will
Non-twist multifilament by twisted filament process to increase the twist of 5T/10cm -30T/10cm, so as to obtain multifilament；The FDY filament
Fracture strength is 5.2 cN/dtex -12.0 cN/dtex, and elongation at break is 7% -23%.
The acquisition elastic force monofilament refers to：Selected elongation at break is 300% -600%, and elastic recovery rate is 85% -95%
Elastic polyurethane fiber monofilament or PVC elastic force monofilament.
The principle of the present invention is described as follows：
FDY filament：Refer to FDY（FULLY DRAWN YARN）Fully drawn yarn introduces stretching action in spinning process, can obtain
Obtain the undrawn yarn with high-orientation and crystalline medium degree, as fully drawn yarn.The conventional fully drawn yarn for having terylene and polyamide fibre,
Belong to chemical-fibres filaments.
The diameter of multifilament is the 75% -125% of elastic force filament diameter：Optimal selection is multifilament, the diameter one of elastic force monofilament
It causes, such most convenient is manufactured.Because during processing, it is consistent with two root unit body feeding speed of thickness, during twisting, two
Root unit body generates identical twist contraction, and the structure of two root unit body loopings arranged side by side is just stablized, just suitable for sewing thread in the present invention
Actual fabrication and large-scale production.
The bifilar sewing thread of single multifilament in the present invention, referring to Fig. 1 and Fig. 2, when in an axial direction by force-extension, multifilament
Since its resilience is relatively poor, deformation is not likely to produce, is tightened under the effect of external force, form sandwich layer yarn, and elastic force monofilament is then
The multifilament that can be stretched squeezes and buckling, forms yarn helix and is wrapped in outside multifilament, forms fasciated yarn.Assuming that the width of single thread
（Diameter）For D, before stretching, the width of single bifilar sewing thread of multifilament is multifilament, the sum of diameter of elastic force monofilament, as 2D, when
After elastic force monofilament translates into looping structure after sewing thread is stretched, the width of sewing thread becomes 3D, i.e. sewing thread produces drawing
Stretch dilatancy.By the bifilar sewing thread of single multifilament produced by the present invention, have the characteristics that adapt to sew and suture at a high speed secured：One side
Face in sewing, since sewing thread even structure is without filoplume, sutures conducive to puncturing, meanwhile, have high intensity, high rigidity feature
Multifilament undertake the effect of stitch tension, be suitble to sewing processing at a high speed；On the other hand, the product of suture, draws under external force
It stretches, has high flexibility, the elastic force monofilament of high resiliency feature can generate winding effect, sewing thread generates laterally swollen because of stretching
It is swollen, prevent the sliding of sewing thread.
Boundling and wire process：Non-twist multifilament is prepared by boundling and wire process, boundling is designed by fineness, to ensure tow
Line density, monofilament tension want uniformity, in favor of the progress of subsequent handling.Boundling and wire process are by silk and close one
It rises, does not twist.
Twisted filament process：The twist of 5T/10cm -30T/10cm is added to aforementioned non-twist multifilament by twisted filament process, makes multifilament
Stable structure is laterally not easy destruction of decoherencing.
Winding procedure：That is reeling process.This process changes package, increases the Rong Siliang of tow package, improves later process
Productivity.Operation while, tow is checked using yarn cleaning device, remove tow on quality influential fault and
Impurity improves the uniformity and finish of tow.
High-temperature shaping process：Under certain temperature and damp condition, no-station pole canopy heat treatment is carried out to primary sewing thread, is eliminated
The internal stress that strand is generated by twisting stablizes the twist of strand, and the twist contraction that strand generates is avoided to influence sewed product presentation quality.
Embodiment 1：
Obtain multifilament：First selected FDY filament is passed through by boundling and wire process to obtain non-twist multifilament, then by non-twist multifilament
Twisted filament process is to increase the twist of 5T/10cm, so as to obtain multifilament；The fracture strength of the FDY filament is 5.2 cN/dtex,
Elongation at break is 7%.
Obtain elastic force monofilament：Selected elongation at break is 300% -600%, and elastic recovery rate is 85% -95% spandex bullet
Power monofilament or PVC elastic force monofilament are as elastic force monofilament.
Make the bifilar sewing thread of single multifilament：First by multifilament, elastic force monofilament simultaneously by doubling frame so that multifilament, elastic force monofilament
It mutually kinks as primary sewing thread, the diameter of multifilament is the 100% of elastic force filament diameter, then carries out high temperature to primary sewing thread and determine
For type to obtain the bifilar sewing thread of single multifilament, Poisson's ratio is -0.14.
Embodiment 2：
Substance with embodiment 1, the difference lies in：
Obtaining multifilament, after elastic force monofilament, winding procedure first is carried out to multifilament, elastic force monofilament respectively with obtain multifilament bobbin,
Monofilament bobbin, then by multifilament bobbin, monofilament bobbin on doubling frame, then by multifilament, the bullet on multifilament bobbin, monofilament bobbin
Power monofilament is simultaneously by doubling frame so that multifilament, elastic force monofilament are mutually kinked as primary sewing thread；To multifilament, elastic force monofilament into
While row winding procedure, multifilament, elastic force monofilament are checked using yarn cleaning device, and remove on quality influential fault
And impurity.
Embodiment 3：
Substance with embodiment 1, the difference lies in：
It obtains in multifilament：Non-twist multifilament is by twisted filament process to increase the twist of 20T/10cm；The fracture strength of the FDY filament
For 8.1 cN/dtex, elongation at break 16%.
It makes in the bifilar sewing thread of single multifilament：The diameter of multifilament is the 75% of elastic force filament diameter, single bifilar sewing thread of multifilament
Poisson's ratio be -0.25.
Embodiment 4：
Substance with embodiment 1, the difference lies in：
It obtains in multifilament：Non-twist multifilament is by twisted filament process to increase the twist of 25T/10cm；The fracture strength of the FDY filament
For 10.6 cN/dtex, elongation at break 21%.
It makes in the bifilar sewing thread of single multifilament：The diameter of multifilament is the 95% of elastic force filament diameter, single bifilar sewing thread of multifilament
Poisson's ratio be -0.32.
Embodiment 5：
Substance with embodiment 1, the difference lies in：
It obtains in multifilament：Non-twist multifilament is by twisted filament process to increase the twist of 15T/10cm；The fracture strength of the FDY filament
For 7.8 cN/dtex, elongation at break 9.2%.
It makes in the bifilar sewing thread of single multifilament：The diameter of multifilament is the 105% of elastic force filament diameter, single bifilar sewing of multifilament
The Poisson's ratio of line is -0.22.
Embodiment 6：
Substance with embodiment 1, the difference lies in：
It obtains in multifilament：Non-twist multifilament is by twisted filament process to increase the twist of 22T/10cm；The fracture strength of the FDY filament
For 9.8 cN/dtex, elongation at break 13%.
It makes in the bifilar sewing thread of single multifilament：The diameter of multifilament is the 100% of elastic force filament diameter, single bifilar sewing of multifilament
The Poisson's ratio of line is -0.50.
Embodiment 7：
Substance with embodiment 1, the difference lies in：
It obtains in multifilament：Non-twist multifilament is by twisted filament process to increase the twist of 12T/10cm；The fracture strength of the FDY filament
For 10.6 cN/dtex, elongation at break 18%.
It makes in the bifilar sewing thread of single multifilament：The diameter of multifilament is the 75% of elastic force filament diameter, single bifilar sewing thread of multifilament
Poisson's ratio be -0.18.
Embodiment 8：
Substance with embodiment 1, the difference lies in：
It obtains in multifilament：Non-twist multifilament is by twisted filament process to increase the twist of 14T/10cm；The fracture strength of the FDY filament
For 12 cN/dtex, elongation at break 23%.
It makes in the bifilar sewing thread of single multifilament：The diameter of multifilament is the 125% of elastic force filament diameter, single bifilar sewing of multifilament
The Poisson's ratio of line is -0.26.
Embodiment 9：
Substance with embodiment 1, the difference lies in：
It obtains in multifilament：Non-twist multifilament is by twisted filament process to increase the twist of 9.8T/10cm；The fracture of the FDY filament is strong
It spends for 8.3 cN/dtex, elongation at break 20.8%.
It makes in the bifilar sewing thread of single multifilament：The diameter of multifilament is the 105% of elastic force filament diameter, single bifilar sewing of multifilament
The Poisson's ratio of line is -0.31.
Claims (10)
1. a kind of bifilar sewing thread of single multifilament with drawn expanded performance, it is characterised in that：The bifilar sewing thread of the list multifilament
Including multifilament, the elastic force monofilament mutually kinked, multifilament, elastic force monofilament are between each other in parallel construction, and multifilament is FDY filament system
It forms；The multifilament, elastic force monofilament are wavy shaped configuration, and the diameter of multifilament is the 75% -125% of elastic force filament diameter, multiple
The intensity of silk is more than elastic force monofilament, and the flexibility of multifilament is less than elastic force monofilament；The Poisson's ratio of the bifilar sewing thread of the list multifilament is less than 0
More than or equal to -0.5.
2. a kind of bifilar sewing thread of single multifilament with drawn expanded performance according to claim 1, it is characterised in that：Institute
The diameter for stating multifilament is the 100% of elastic force filament diameter.
3. a kind of bifilar sewing thread of single multifilament with drawn expanded performance according to claim 1 or 2, feature exist
In：The fracture strength of the FDY filament is 5.2 cN/dtex -12.0 cN/dtex, and elongation at break is 7% -23%.
4. a kind of bifilar sewing thread of single multifilament with drawn expanded performance according to claim 1 or 2, feature exist
In：The FDY filament is FDY polyester filament or FDY polyamide filaments.
5. a kind of bifilar sewing thread of single multifilament with drawn expanded performance according to claim 1 or 2, feature exist
In：The elongation at break of the elastic force monofilament is 300% -600%, and elastic recovery rate is 85% -95%.
6. a kind of bifilar sewing thread of single multifilament with drawn expanded performance according to claim 1 or 2, feature exist
In：The elastic force monofilament is elastic polyurethane fiber monofilament or PVC elastic force monofilament.
7. a kind of manufacturing method of single multifilament bifilar sewing thread described in claim 1 with drawn expanded performance, feature
It is that the manufacturing method includes the following steps：
Multifilament, elastic force monofilament are first obtained respectively, then by multifilament, elastic force monofilament simultaneously by doubling frame so that multifilament, elastic force monofilament
It mutually kinks as primary sewing thread, high-temperature shaping is then carried out to primary sewing thread to obtain the bifilar sewing of single multifilament
Line.
8. a kind of manufacturing method of bifilar sewing thread of single multifilament with drawn expanded performance according to claim 7,
It is characterized in that：After multifilament, elastic force monofilament is obtained, winding procedure first is carried out to multifilament, elastic force monofilament to obtain multifilament respectively
Bobbin, monofilament bobbin, then by multifilament bobbin, monofilament bobbin on doubling frame, then by answering on multifilament bobbin, monofilament bobbin
Silk, elastic force monofilament are simultaneously by doubling frame so that multifilament, elastic force monofilament are mutually kinked as primary sewing thread；To multifilament, elastic force
While monofilament carries out winding procedure, multifilament, elastic force monofilament are checked using yarn cleaning device, and removes and has an impact to quality
Fault and impurity.
9. a kind of manufacturing method of bifilar sewing thread of single multifilament with drawn expanded performance according to claim 7 or 8,
It is characterized in that：
The acquisition multifilament refers to：First by selected FDY filament by boundling and wire process to obtain non-twist multifilament, then will be non-twist
Multifilament by twisted filament process to increase the twist of 5T/10cm -30T/10cm, so as to obtain multifilament；The fracture of the FDY filament
Intensity is 5.2 cN/dtex -12.0 cN/dtex, and elongation at break is 7% -23%.
10. a kind of manufacturer of bifilar sewing thread of single multifilament with drawn expanded performance according to claim 7 or 8
Method, it is characterised in that：
The acquisition elastic force monofilament refers to that selected elongation at break is 300% -600%, and elastic recovery rate is 85% -95% spandex
Elastic force monofilament or PVC elastic force monofilament.
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