CN103361811B - A kind of negative poisson ratio yarn structure and manufacture method thereof - Google Patents
A kind of negative poisson ratio yarn structure and manufacture method thereof Download PDFInfo
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- CN103361811B CN103361811B CN201210212844.3A CN201210212844A CN103361811B CN 103361811 B CN103361811 B CN 103361811B CN 201210212844 A CN201210212844 A CN 201210212844A CN 103361811 B CN103361811 B CN 103361811B
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Abstract
The invention belongs to textile technology field, and disclose a kind of negative poisson ratio yarn structure and manufacture method thereof, this negative poisson ratio yarn structure is formed by the first yarn and the second Yarn twisting, and the stretch modulus of the first yarn is greater than the stretch modulus of the second yarn.Its manufacture method comprises the following steps: 1) yarn feeding: the first yarn alternately and the second yarn are fed into yarn forming region simultaneously; 2) Yarn twisting: twist the first yarn of feeding and the second yarn by rotating slotted eye rotating disk, the first yarn and the second yarn pool negative poisson ratio yarn structure in the porch of twisting aggregation device subsequently simultaneously.Negative poisson ratio yarn structure of the present invention adopts the yarn of two groups of different modulus to twist together, Stability Analysis of Structures, top layer yarn without slippage, the twist distribution even and stretch time yam surface smooth.Manufacture method of the present invention is simple to operate, enforcement is convenient and device therefor cost is low, can be continuously produced, is convenient to promotion and implementation.
Description
Technical field
The invention belongs to textile technology field, and relate to a kind of yarn texture and manufacture method thereof.More specifically, the present invention relates to a kind of novel negative poisson ratio yarn structure and manufacture method thereof.
Background technology
In daily life, seen solid material is positive Poisson ratio material usually, and when this kind of material is subject to stretching (or compression) in one direction, it can produce contraction (or expansion) distortion perpendicular to force direction.Negative poisson's ratio material is then on the contrary, and when they are subject to stretching (or compression) in one direction, it can produce expansion (or contraction) distortion perpendicular to force direction.Therefore, negative poisson's ratio material is otherwise known as auxetic materials, the unusual mechanical property that it shows not only causes showing great attention to of material science and mechanics field researcher, and many special purposes can be developed, as sensor, explosion-proof, anticollision, sound insulation, filtration and intelligent bandage etc.
In recent years, utilize textile technology to manufacture various negative poisson's ratio material to be subject to people and more and more to pay close attention to.As one weaving negative poisson's ratio material, development and the application of negative poisson ' s ratio yarn are subject to people's attention equally.Patent WO2007/125352A1 describes a kind of negative poisson ratio yarn structure.This yarn texture by easy elongation strain elasticity heart yarn and be wrapped in the outside and rigid yarn of not easily elongation strain of heart yarn in screw type mode and form.When being subject to stretching, the outside yarn be wound around is straightened, and heart yarn is bent, causes the increase of yarn diameter and produce Negative poisson's ratio.But the easy slippage of yarn that this yarn texture outside is wound around, causes yarn texture instability and twist irregularity.In addition, the negative poisson ' s ratio effect of this yarn texture is less, and during stretching, yam surface is uneven, because which limit it in the application of clothes with other field.
Patent WO2010/146347A1 describes another kind of negative poisson ratio yarn structure.This yarn texture is formed by material internal yarn helix larger for modulus being embedded into modulus less.When being subject to elongation strain effect, inner screw type yarn is straightened, thus causes the change of outer wrap material shape to realize Negative poisson's ratio.Although this yarn texture does not exist the problem of outer wrap material slippage, because outer wrap material self is to the constraint of spiral yarn, negative poisson ' s ratio DeGrain, during stretching, yam surface is uneven equally.
Patent US2011/0039088A1 describes a kind of negative poisson ratio yarn structure similar with patent WO2007/125352A1, but the outside yarn be wound around changes the long filament to humidity sensitive into.When humidity changes, the long filament of outer moisture sensitivity produces and shrinks, and causes heart yarn to bend, causes the increase of yarn diameter and produce Negative poisson's ratio.This yarn can be used for manufacturing comfortableness clothes; When humidity increases, the gas permeability of fabric increases due to the change of negative poisson ' s ratio yarn shape, thus strengthens the comfortableness of clothes.But there is the easy slippage of outer yarn equally in this yarn texture, the problem such as during stretching the uneven and Negative poisson's ratio of yam surface is little.
Can find out from above related application, in prior art negative poisson ratio yarn structure all have that Negative poisson's ratio is little, yarn texture is unstable and twist irregularity and stretch time yam surface rough shortcoming, limit the extensive use of negative poisson ' s ratio yarn.
Summary of the invention
The technical problem to be solved in the present invention is, for in prior art, the Negative poisson's ratio of negative poisson ratio yarn structure is little, yarn texture is unstable and twist irregularity and the defects such as yam surface is uneven when stretching, provide that a kind of Negative poisson's ratio is remarkable, yarn texture is stablized and the twist evenly and stretch time the smooth negative poisson ratio yarn structure of yam surface and manufacture method thereof.
The technical problem to be solved in the present invention is achieved by the following technical programs: provide a kind of negative poisson ratio yarn structure, wherein, described yarn texture is formed by the first yarn and the second Yarn twisting, the stretch modulus of described first yarn is greater than the stretch modulus of described second yarn, and described first yarn and described second yarn are alternately.
In above-mentioned negative poisson ratio yarn structure, described first yarn to be positioned at outside described yarn texture and spaced, and described second yarn to be positioned at inside described yarn texture and to contact with each other.
In above-mentioned negative poisson ratio yarn structure, described first yarn is identical with the radical of described second yarn.
In above-mentioned negative poisson ratio yarn structure, the radical of described first yarn and described second yarn is at least respectively 2.
In above-mentioned negative poisson ratio yarn structure, the diameter of described first yarn is less than the diameter of described second yarn.
In above-mentioned negative poisson ratio yarn structure, the combination of described first yarn and described second yarn is terylene thread/rubber band yarn, terylene thread/lastex, sewing thread/spandex core-spun yarn, carbon fibers/fiberglass, fishing line/lastex or nylon yarn/rubber band yarn.
According to a further aspect in the invention, a kind of manufacture method of negative poisson ratio yarn structure is provided, said method comprising the steps of:
S1, yarn feeding step: the first yarn and the second yarn are fed into yarn forming region simultaneously;
S2, Yarn twisting step: twist described first yarn of feeding and the second yarn by rotating slotted eye rotating disk, described first yarn and the second yarn pool described negative poisson ratio yarn structure in the porch of twisting aggregation device subsequently simultaneously.
In the manufacture method of above-mentioned negative poisson ratio yarn structure, described method is further comprising the steps of:
S3, yarn tractive and batch step: by roller device and described twisting aggregation device, the negative poisson ratio yarn structure tractive of twisting shaping in described step S2 is gone out described yarn forming region, and be wound up on coiler device.
In the manufacture method of above-mentioned negative poisson ratio yarn structure, in described step S1, by described first yarn and second yarn of location, the hole feeding of described slotted eye rotating disk; Wherein the tension force of the first yarn and the second yarn can regulate separately.
In the manufacture method of above-mentioned negative poisson ratio yarn structure, by the twist of negative poisson ' s ratio yarn described in the rotational speed regulation that changes yarn draw rate and/or described slotted eye rotating disk.Meanwhile, the center of slotted eye rotating disk can be regulated to the distance of the distance at twisting aggregation device portal place and the punch position to the first yarn and the second yarn.
Implement negative poisson ratio yarn structure of the present invention and can obtain following beneficial effect: (1) this negative poisson ratio yarn structure adopts the yarn of two groups of different modulus to twist together, the shortcomings such as yarn texture has good stability, and when overcoming negative poisson ratio yarn structure top layer yarn slip in prior art, structural instability and twist skewness and stretch yam surface is uneven; (2) the raw material range of choice of this negative poisson ratio yarn structure is wide, as long as the yarn that two groups of modulus are different may be used to manufacture this yarn texture: (3) this negative poisson ratio yarn structure has larger negative poisson ' s ratio, can be used for the fabric of different negative poisson ' s ratio and the making of structure, in fields such as functional clothing, composite enhancing, communications and transportation, health care, Aero-Space, there is good application prospect.
The manufacture method implementing negative poisson ratio yarn structure of the present invention can obtain following beneficial effect: this manufacture method is simple to operate, enforcement is convenient and device therefor cost is low, can be continuously produced, is convenient to promotion and implementation.
Accompanying drawing explanation
Below with reference to the drawings and specific embodiments, the present invention is described in further details.In accompanying drawing:
Fig. 1 is the structural representation before negative poisson ratio yarn structure of the present invention is subject to axial tension;
Fig. 2 is the structural representation of negative poisson ratio yarn structure of the present invention when being subject to axial tension;
Fig. 3 a is the schematic cross-section of negative poisson ratio yarn structure of the present invention before being subject to axial tension;
Fig. 3 b is that negative poisson ratio yarn structure of the present invention is being subject to the schematic cross-section in axial tension process;
The schematic cross-section that Fig. 3 c is negative poisson ratio yarn structure of the present invention when being subject to that in axial tension process, diameter reaches maximum;
Fig. 4 a is the schematic diagram of the manufacture method according to negative poisson ratio yarn structure of the present invention;
Fig. 4 b be according to of the present invention in the manufacture process of negative poisson ratio yarn structure the first yarn and the second yarn at the layout of slotted eye rotating disk;
Fig. 4 c is the flow chart of the manufacture method according to negative poisson ratio yarn structure of the present invention;
Fig. 5 is the axial tension F (N) of negative poisson ratio yarn structure according to the embodiment of the present invention 1 and the curve map of axial strain ε x relation; Wherein, the first yarn is nylon yarn, and the second yarn is rubber band yarn;
Fig. 6 is the curve map of Poisson's ratio V according to the negative poisson ratio yarn structure of the embodiment of the present invention 1 and axial strain ε x relation; Wherein, the first yarn is nylon yarn, and the second yarn is rubber band yarn;
Fig. 7 is the axial tension F (N) of negative poisson ratio yarn structure according to the embodiment of the present invention 2 and the curve map of axial strain ε x relation; Wherein, the first yarn is fishing line, and the second yarn is lastex;
Fig. 8 is the curve map of Poisson's ratio V according to the negative poisson ratio yarn structure of the embodiment of the present invention 2 and axial strain ε x relation; Wherein, the first yarn is fishing line, and the second yarn is lastex.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, the invention provides a kind of novel negative poisson ratio yarn structure, this yarn texture is twisted by the first yarn 1 alternately and the second yarn 2 and is formed, wherein, the stretch modulus of the first yarn 1 is greater than the stretch modulus of the second yarn 2, and the diameter of the first yarn 1 is less than the diameter of the second yarn 2.Figure 1 shows that the negative poisson ratio yarn structure under non-pulled out condition, as can be seen from Figure, the second yarn 2 to be positioned at inside yarn texture and close contact each other, and the first yarn 1 is positioned at outside yarn texture and do not contact each other.This negative poisson ratio yarn structure is when being subject to axial tension or compression, and its direction perpendicular to axial direction can corresponding expansion or contraction.Further, due to yarn texture through twisting formed, Stability Analysis of Structures, without top layer yarn slippage defect and the twist be evenly distributed, and stretching or compression process in yam surface keep smooth, be therefore applicable to well weaving and clothes manufacture field.
In addition, the first and second yarns that the present invention adopts radical equal manufacture described negative poisson's ratio material.The radical of the first and second yarns used is at least 2.As illustrated in fig. 1 and 2, illustrate yarn texture then to be formed by 3 first yarns and the second Yarn twisting respectively.
With reference to Fig. 1 and 2, H
0and H
1be respectively the height of side projection when negative poisson ratio yarn structure of the present invention is not subject to axial tension and is subject to axial tension.According to the above-mentioned property description to yarn texture of the present invention, H
1h should be greater than
0; And also prove H through actual tests test
1be greater than H
0, fully demonstrate the remarkable Negative poisson's ratio that yarn texture of the present invention has.The structure change of negative poisson's ratio material of the present invention when being subject to axial tension is described in detail below in conjunction with Fig. 3 a-3c.
Fig. 3 a to 3c is the schematic cross-section of negative poisson ratio yarn structure of the present invention before the stretching, in drawing process and when the diameter of yarn texture reaches maximum respectively.Wherein R represents the radius of the second yarn, and r represents the radius of the first yarn, and R is greater than r.(Fig. 3 a), the second yarn to be positioned at inside yarn texture and close contact each other before the stretching; First yarn is positioned at the outside line of structure yarn and is spaced from each other.When yarn is subject to axial tension (Fig. 3 b), because the stretch modulus of two groups of yarns is different, the first yarn is because stretch modulus larger axis is to not easily elongating, and spiral is more easily stretching, therefore produces the trend of the center movement to yarn texture; And the second yarn easily elongates due to the less axis of stretch modulus, its position is easily extruded by the first yarn, thus the inside and outside transfer phenomena relatively of the yarn that two groups of different modulus occur, and in this process obviously the diameter of visible yarn texture increase gradually.When the first yarn arrives the inside of yarn texture completely (Fig. 3 c), the diameter of yarn texture reaches maximum.
Fig. 4 a and 4b is schematic diagram and the flow chart of the manufacture method of root negative poisson ratio yarn structure of the present invention respectively.See Fig. 4 a and 4b, the manufacture method of negative poisson ratio yarn structure comprises following three steps:
1, yarn feeding step: the first yarn 1 and the second yarn 2 are fed into yarn forming region from yarn cylinder 3 simultaneously by thread tension device, by the hole of slotted eye rotating disk 4, first yarn 1 and the second yarn 2 are accurately located in feeding process, and the first yarn 1 of feeding and the second yarn 2 should be alternately.It should be noted, the tension force of feeding yarn can be regulated separately.
2, Yarn twisting step: twist the first yarn 1 of feeding and the second yarn 2 by rotating slotted eye rotating disk 4, it pools negative poisson ratio yarn structure at the porch O of twisting aggregation device 5 subsequently simultaneously; Wherein, by the twist of the negative poisson ratio yarn structure that regulates the rotational speed regulation of slotted eye rotating disk 4 finally to be formed.
3, yarn tractive and batch step: the negative poisson ratio yarn structure tractive yarn line forming region of shaping will be twisted in step 2 by roller device 6 and twisting aggregation device 5, and be wound up on coiler device 7; Wherein, the twist by regulating yarn draw rate to regulate the final negative poisson ratio yarn structure formed.
Can be obtained by above-mentioned steps and there is certain twist, Stability Analysis of Structures and the obvious negative poisson ratio yarn structure of Negative poisson's ratio.In addition, the configuration of each device adopted in above-mentioned yarn texture process can be manufactured according to actual conditions adjustment.Such as, the distance of the distance of center to twisting aggregation device 5 porch O of adjustable slotted eye rotating disk 4 and the punch position to the first yarn 1 and the second yarn 2.
The manufacture process of negative poisson ratio yarn structure of the present invention is further illustrated below by way of specific embodiment.
Embodiment 1:
The rubber band yarn selecting stretch modulus less respectively and the larger nylon yarn of stretch modulus are as the second yarn and the first yarn, and wherein, the diameter of rubber band yarn is 0.5mm, and the diameter of nylon yarn is 0.4mm.By thread tension device, 2 rubber band yarns and nylon yarn are fed into yarn forming region from yarn cylinder 3 simultaneously, in feeding process, by the hole of slotted eye rotating disk 4, rubber band yarn and nylon yarn are accurately located, and make both alternately; Twist the rubber band yarn of feeding and nylon yarn by rotating slotted eye rotating disk 4, it pools negative poisson ratio yarn structure at the porch O of twisting aggregation device 5 subsequently simultaneously; By the negative poisson ratio yarn structure tractive yarn line forming region that twisting is shaped by roller device 6 and twisting aggregation device 5, and be wound up on coiler device 7.The twist by regulating yarn draw rate to regulate final obtained negative poisson ratio yarn structure in this embodiment, show that the number of twists of negative poisson ' s ratio yarn in embodiment 1 is 140 twists/m after tested.
Fig. 5 and Fig. 6 is the axial tension F (N) of the negative poisson ratio yarn structure of the embodiment of the present invention 1 and the curve map of axial strain ε x, Poisson's ratio V and axial strain ε x relation respectively.The tension test of above-mentioned yarn samples completes on tester Instron5566, configures a computer and a camera in addition, controls by program software image and the stretcher strain data that yarn diameter change in test process recorded in time by camera.As can be seen from Figure, under certain axial tension effect, in embodiment 1, the Poisson's ratio V of negative poisson ratio yarn structure increases along with the increase of axial strain, embodies stronger Negative poisson's ratio.In addition, by the change of yarn texture configuration of surface in camera real-time monitored drawing process, the phenomenon without outer yarn slip or yarn texture surface irregularity exists.Yarn texture moisture absorption obtained in embodiment 1 is ventilative, well-pressed smooth, and has unique negative poisson ' s ratio effect, in athletic protective etc., have wide application space.
Embodiment 2:
Select lastex that stretch modulus is less and the larger fishing line of stretch modulus as the second yarn and the first yarn respectively, wherein, the diameter of lastex is 0.7mm, and the diameter of fishing line is 0.5mm.By thread tension device, 3 lastexes and fishing line are fed into yarn forming region from yarn cylinder 3 simultaneously, in feeding process, by the hole of slotted eye rotating disk 4, lastex and fishing line are accurately located, and make both alternately; Twist the lastex of feeding and fishing line by rotating slotted eye rotating disk 4, it pools negative poisson ratio yarn structure at the porch O of twisting aggregation device 5 subsequently simultaneously; By the negative poisson ratio yarn structure tractive yarn line forming region that twisting is shaped by roller device 6 and twisting aggregation device 5, and be wound up on coiler device 7.Pass through the twist of the negative poisson ratio yarn structure regulating the rotational speed regulation of slotted eye rotating disk 4 finally to be formed in this embodiment, show that the number of twists of negative poisson ' s ratio yarn in embodiment 2 is 140 twists/m after tested.
Fig. 7 and Fig. 8 is the axial tension F (N) of the negative poisson ratio yarn structure of the embodiment of the present invention 2 and the curve map of axial strain ε x, Poisson's ratio V and axial strain ε x relation respectively.The tension test of above-mentioned yarn samples completes on tester Instron5566, configures a computer and a camera in addition, controls by program software image and the stretcher strain data that yarn diameter change in test process recorded in time by camera.As can be seen from Figure, under certain axial tension effect, in embodiment 2, the Poisson's ratio V of negative poisson ratio yarn structure increases along with the increase of axial strain, embodies stronger Negative poisson's ratio.In addition, by the change of yarn texture configuration of surface in camera real-time monitored drawing process, the phenomenon without outer yarn slip or yarn texture surface irregularity exists.Yarn texture obtained in embodiment 2 has Stability Analysis of Structures, the wear-resisting and advantage that intensity is large, is applicable to doing rope, enhanced type composite material etc.
Embodiment 3:
Select glass fibre that stretch modulus is less and the larger carbon fiber of stretch modulus as the second yarn and the first yarn respectively, wherein, the diameter of glass fibre is 0.2mm, and the diameter of carbon fiber is 0.1mm; All the other operating procedures are identical with embodiment 1, at this no longer repeated description.The number of twists of the negative poisson ' s ratio yarn obtained by drawing after tested in embodiment 3 is 50 twists/m.
Embodiment 4:
Select spandex core-spun yarn that stretch modulus is less and the larger sewing thread of stretch modulus as the second yarn and the first yarn respectively, wherein, the diameter of spandex core-spun yarn is 0.6mm, and the diameter of terylene thread is 0.4mm; All the other operating procedures are identical with embodiment 2, at this no longer repeated description.The number of twists of the negative poisson ' s ratio yarn obtained by drawing after tested in embodiment 4 is 140 twists/m.
Embodiment 5:
Select lastex that stretch modulus is less and the larger terylene thread of stretch modulus as the second yarn and the first yarn respectively, wherein the diameter of lastex is 0.6mm, the diameter of terylene thread is 0.4mm, and all the other operating procedures are identical with embodiment 2, at this no longer repeated description.The number of twists of the negative poisson ' s ratio yarn obtained by drawing after tested in embodiment 5 is 145 twists/m.
Except above five kinds of examples, other suitable yarns also can be selected to meet the negative poisson ratio yarn structure of application claims as raw material preparation, simultaneously, the combinationally using of various yarns that the present invention lists also is not limited to combinations thereof, as long as the stretch modulus of the first yarn used is greater than the stretch modulus of the second yarn, and the diameter of the first yarn is less than the stretching diameter of the second yarn.Such as, the yarn (the first yarn) that the stretch modulus that uses of negative poisson ratio yarn structure of the present invention is larger can expand to short fibre yarn, chemical-fibres filaments, natural fabric and chemical mixed yarn etc.; Yarn (the second yarn) easily extensible that stretch modulus is less is cotton synthetic fibre cladded yarn etc.Along with composite yarn selects the increase of category, negative poisson ratio yarn structure kind of the present invention also can show diversity, will have good application prospect in fields such as functional clothing, home textile product, health care, communications and transportation, composite enhancing, Aero-Space.
From above-described embodiment, adopt manufacture method of the present invention can obtain the significant yarn texture of Negative poisson's ratio, it not only has good stability, and overcome negative poisson ratio yarn structure top layer yarn slip in prior art and twist skewness and stretch time yam surface rough problem.The raw material range of choice of negative poisson ratio yarn structure of the present invention is wide, as long as the yarn that two groups of modulus are different may be used to manufacture this yarn texture: its manufacture method is simple to operate, implement convenient and device therefor cost is low, can be continuously produced, be convenient to promotion and implementation.
The foregoing is only the preferred embodiments of the present invention, not in order to limit the present invention, all do in the spirit and principles in the present invention any amendment, equivalent to replace or improvement etc., all should be included in protection scope of the present invention.
Claims (6)
1. a negative poisson ratio yarn structure, it is characterized in that, described yarn texture comprises the first yarn (1) and the second yarn (2), described first yarn (1) is identical with the radical of described second yarn (2) and be at least 2, the diameter of described first yarn (1) is less than the diameter of described second yarn (2), and described yarn texture is jointly twist one yarn formed by all the first yarns (1) and the second yarn (2) simultaneously, the stretch modulus of described first yarn (1) is greater than the stretch modulus of described second yarn (2),
Under free state, described second yarn (2) to be positioned at inside described yarn texture and to contact with each other, and described first yarn (1) to be positioned at outside described yarn texture and spaced;
Under axial tension state, described first yarn (1) is moved to the center of yarn texture, second yarn (2) is extruded by the first yarn (1), described first yarn (1) is positioned at inside described yarn texture and contact with each other, described second yarn (2) to be positioned at outside described yarn texture and spaced, and then makes the first yarn (1) and described second yarn (2) that inside and outside relatively to shift occur.
2. negative poisson ratio yarn structure according to claim 1, it is characterized in that, the combination of described first yarn (1) and described second yarn (2) is terylene thread/rubber band yarn, terylene thread/lastex, sewing thread/spandex core-spun yarn, carbon fibers/fiberglass, fishing line/lastex or nylon yarn/rubber band yarn.
3. a manufacture method for negative poisson ratio yarn structure according to claim 1, is characterized in that, said method comprising the steps of:
S1, yarn feeding step: the first yarn (1) alternately and the second yarn (2) are fed into yarn forming region simultaneously;
S2, Yarn twisting step: twist described first yarn (1) of feeding and the second yarn (2) by rotating slotted eye rotating disk (4), described first yarn (1) and the second yarn (2) pool described negative poisson ratio yarn structure in the porch of twisting aggregation device (5) subsequently simultaneously.
4. the manufacture method of negative poisson ratio yarn structure according to claim 3, is characterized in that, described method is further comprising the steps of:
S3, yarn tractive and batch step: by roller device (6) and described twisting aggregation device (5), the negative poisson ratio yarn structure tractive of twisting shaping in described step S2 is gone out described yarn forming region, and be wound up on coiler device (7).
5. the manufacture method of the negative poisson ratio yarn structure according to claim 3 or 4, it is characterized in that, in described step S1, by described first yarn (1) and second yarn (2) of location, the hole feeding of described slotted eye rotating disk (4).
6. the manufacture method of negative poisson ratio yarn structure according to claim 4, is characterized in that, by the twist of negative poisson ' s ratio yarn described in the rotational speed regulation that changes yarn draw rate and/or described slotted eye rotating disk (4).
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| CN1768176A (en) * | 2003-03-29 | 2006-05-03 | 道科宁有限公司 | Improvements in and relating to composite materials and structures |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107254724A (en) * | 2017-07-04 | 2017-10-17 | 东华大学 | The three shafting cone cylinder formula composite spinning devices and method of a kind of negative poisson's ratio yarn |
| CN107254724B (en) * | 2017-07-04 | 2019-04-09 | 东华大学 | A kind of three shafting cone cylinder formula composite spinning devices and method of negative poisson's ratio yarn |
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| CN103361811A (en) | 2013-10-23 |
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