CN108570758B - Method for manufacturing negative Poisson ratio warp knitted fabric - Google Patents
Method for manufacturing negative Poisson ratio warp knitted fabric Download PDFInfo
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- CN108570758B CN108570758B CN201810330212.4A CN201810330212A CN108570758B CN 108570758 B CN108570758 B CN 108570758B CN 201810330212 A CN201810330212 A CN 201810330212A CN 108570758 B CN108570758 B CN 108570758B
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/021—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polyethylene
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
-
- 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
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- 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]
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- 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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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/061—Load-responsive characteristics elastic
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- Textile Engineering (AREA)
- Knitting Of Fabric (AREA)
Abstract
The invention discloses a negative Poisson ratio warp-knitted fabric, which consists of a plurality of minimum basic units with concave structures, wherein each minimum basic unit is a polygon with a concave outline, and each minimum basic unit consists of a wale part, an elastic extension line part and a non-elastic extension line part, and the warp-knitted fabric has a negative Poisson ratio effect in a plurality of directions in the plane of the warp-knitted fabric. The warp-knitted fabric is stable in structure and can be restored to the original state and keep the negative Poisson ratio effect after being stretched repeatedly for many times. The invention also discloses a manufacturing method of the negative Poisson ratio warp-knitted fabric, the negative Poisson ratio warp-knitted fabric can be produced by the manufacturing method without complex post-treatment process, the mass production is facilitated, and the production cost is low.
Description
Technical Field
The invention belongs to the field of textiles, and relates to a method for manufacturing a negative poisson ratio warp-knitted fabric.
Background
The poisson's ratio is the negative of the ratio of the transverse strain to the longitudinal strain of a material when deformed by a force. The poisson's ratio of common materials is mostly positive, such as steel, rubber, etc. Such materials contract laterally under longitudinal tension and expand laterally under longitudinal compression, as shown in fig. 1 (a). And in bending, the shape of a saddle is shown due to different types of force applied to the upper surface and the lower surface, as shown in fig. 2 (a). Theoretically, the poisson's ratio for isotropic materials is between-1 and 0.5, indicating that the poisson's ratio of a material can be negative. Negative poisson's ratio materials differ from conventional materials in that they correspondingly elongate or contract in the transverse direction when stretched or compressed in the longitudinal direction, as shown in fig. 1 (b); when bent, a hyperbolic surface is formed as shown in fig. 2 (b). These deformation characteristics allow for an increase in many properties of the negative poisson's ratio material compared to conventional materials, such as compressive properties, fracture toughness, and energy absorption properties. Due to the unique performance of the negative poisson ratio material, the application prospect of the negative poisson ratio material is wide, in recent years, researches on the negative poisson ratio material attract attention of scholars in various fields, various novel negative poisson ratio materials and structures are continuously discovered and designed, and models such as an invagination structure, a rotation structure, a spiral structure and the like are established for explaining the negative poisson mechanism of the material.
In the field of textile-related, especially knitting, research on negative poisson's ratio fabric construction has received increasing attention in recent years.
US 2008/0011021a1, US 2012/0129416a1 and WO 2010/125397a1 describe a type of negative poisson warp knit fabric with a double-arrow structure, which has a negative poisson effect only limited to the oblique direction of the fabric and only under a small strain. In addition, as the weft-inserted yarns are easy to slip and have poor structural stability, the negative Poisson ratio effect is weakened or even disappears after repeated stretching.
US 8772187B 2 describes another type of negative poisson warp knit fabric which forms the original hexagonal mesh into a warp knit fabric with an invaginated structure by incorporating a spacer yarn on the basis of the warp knit hexagonal mesh. Because the warp let-off quantity of the backing yarn in the longitudinal direction changes greatly, the tension is not easy to control in the production process, and the yarn with hexagonal meshes is easy to transfer under the stress condition, so that the negative Poisson ratio effect is weakened.
CN103287025A and US 9475257B 2 describe a warp-knitted spacer fabric with negative poisson effect, which forms a skewed rotating structure on the surface of the fabric by means of extrusion molding on the basis of a mesh warp-knitted spacer fabric, and further generates negative poisson effect under the action of stretching, and the fabric is limited to the negative poisson spacer fabric with certain thickness due to a special after-finishing mode.
CN1049118041 also on the basis of warp knitting hexagonal mesh, the wale is skewed by the way of avoiding yarn laying of the laying yarn, and then the skewed wale rotates under the stretching action to generate negative poisson effect, and the negative poisson effect of this kind of fabric is limited by the selection of yarn type and manufacturing parameters. Also using the principle of CN1049118041, CN106012271A provides a double-sided warp-knitted spacer fabric with negative poisson's ratio effect, which fabric has negative poisson's ratio effect in two planes.
It can be seen from the above related patents that most of the existing negative poisson ratio fabrics are warp-knitted structures, and the negative poisson ratio effect is generated by directly weaving or inclining or recessing the coils in a post-processing mode. The negative Poisson ratio fabric produced by adopting the direct weaving mode has unstable loop structure, yarns forming loops, particularly weft insertion yarns are easy to transfer, the negative Poisson ratio effect is further influenced, and the negative Poisson ratio effect is difficult to maintain after repeated stretching. The negative Poisson ratio fabric produced by adopting the after-finishing mode has obvious negative Poisson ratio effect, but has higher cost and is difficult to produce in batches, and is only limited to warp-knitted spaced knitted fabrics.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a negative poisson ratio warp-knitted fabric which is easy to realize, low in production cost, stable in structure and capable of recovering the original shape and keeping the negative poisson ratio effect after repeated stretching for many times aiming at the defects in the prior art.
In order to solve the above technical problems, the present invention provides a negative poisson's ratio warp-knitted fabric, which is composed of a plurality of minimum basic units having a concave structure, the minimum basic units being polygons having concave contours composed of wale portions, elastic stretch line portions, and inelastic stretch line portions, and has a negative poisson's ratio effect in a plurality of directions within a plane thereof.
As a preferable aspect of the negative poisson's ratio warp-knitted fabric of the present invention, the polygonal shape having the concave contour includes a concave quadrilateral shape or a concave hexagonal shape.
As a preferred version of the negative poisson's ratio warp knit fabric of the present invention, the elastically extensible thread portions are formed from elastic yarns and the inelastically extensible thread portions are formed from inelastic yarns.
As a preferable aspect of the negative poisson's ratio warp-knitted fabric of the present invention, the elastic extension thread portion is composed of two or more continuous elastic extension threads.
As a preferable aspect of the negative poisson's ratio warp-knitted fabric of the invention, the inelastic extension thread portion is composed of two or more continuous inelastic extension threads.
As a preferable aspect of the negative poisson's ratio warp-knitted fabric of the present invention, the elastically extensible thread portions and the inelastically extensible thread portions are alternately arranged at intervals in the longitudinal direction and the transverse direction.
As a preferable aspect of the negative poisson's ratio warp-knitted fabric of the present invention, a distance in the longitudinal direction between the adjacent elastic extension thread portion and the inelastic extension thread portion is equal to or greater than a height of two stitches.
The invention also provides a manufacturing method of the negative Poisson ratio warp-knitted fabric, which comprises the following steps:
at least one front comb adopts non-elastic yarns to fully penetrate or empty penetrate, the specific mode is determined according to back comb threading and fabric texture, two back combs all adopt elastic yarns and non-elastic yarns to equally and alternately thread, and the threading mode is as follows:
GB2：nA，m*，nB，m*，
GB3：nA，m*，nB，m*，
wherein A represents inelastic yarn, B represents elastic yarn, n is an integer not less than 1, m is any non-negative integer, and x represents empty penetration;
the method comprises the steps of weaving on a warp knitting machine with more than 3 guide bars, knitting front bars in a loop mode, knitting rear bars symmetrically with lapping yarns in a loop mode to form a minimum basic unit, and continuously and repeatedly knitting the minimum basic unit to form the warp knitted fabric.
As a preferable mode of the manufacturing method of the present invention, the smallest basic unit is a polygon having a concave contour composed of wale portions, elastic stretch line portions, and inelastic stretch line portions, and the warp knitted fabric has a negative poisson's ratio effect in a plurality of directions in its plane.
As a preferable mode of the manufacturing method of the present invention, the elastic extension line part is composed of two or more adjacent elastic extension lines, the inelastic extension line part is composed of two or more adjacent inelastic extension lines, the elastic extension line part and the inelastic extension line part are alternately arranged in the longitudinal direction and the transverse direction, and the distance between the adjacent elastic extension line part and the inelastic extension line part in the longitudinal direction is greater than or equal to the height of two loops
Compared with the prior art, the negative poisson ratio warp-knitted fabric provided by the invention has the following beneficial effects:
1. the unique threading and weave design of the negative poisson ratio warp-knitted fabric provided by the invention enables the fabric to be easy to weave, and the negative poisson ratio warp-knitted fabric can be produced without a complex post-treatment process, so that the negative poisson ratio warp-knitted fabric is beneficial to mass production and has low production cost.
2. The negative poisson effect of the negative poisson ratio warp-knitted fabric is obvious, and the negative poisson effect can be always kept before the fabric is stretched and broken along the wale.
3. The negative poisson warp-knitted fabric is stable in structure, can restore to the original state under the condition of repeated reciprocating stretching, and keeps the negative poisson effect.
Drawings
FIG. 1(a) is a schematic drawing of a positive Poisson's ratio material, wherein the solid line boxes represent the state before drawing and the dashed line boxes represent the state after drawing;
FIG. 1(b) is a schematic drawing of a negative Poisson ratio material, wherein the dashed boxes represent the state before drawing and the solid boxes represent the state after drawing;
FIG. 2(a) is a schematic illustration of the bending of a positive Poisson's ratio material;
FIG. 2(b) is a schematic illustration of the bending of a negative Poisson ratio material;
FIG. 3(a) is a schematic structural view of a negative Poisson ratio warp knit fabric provided by the present invention;
FIG. 3(b) is a schematic representation of the smallest basic unit of a negative Poisson ratio warp knit fabric provided by the present invention;
FIG. 4(a) is a schematic representation of a negative Poisson ratio warp knit fabric provided in accordance with the present invention prior to stretching;
FIG. 4(b) is a schematic representation of a negative Poisson ratio warp knit fabric provided in accordance with the present invention after stretching;
fig. 5 is a graph of the negative poisson test results of the negative poisson warp-knitted ratio fabric along the transverse direction and the longitudinal direction of the fabric.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
The negative poisson's ratio warp-knitted fabric is composed of the smallest basic unit with the concave characteristic, is completely innovative in structure compared with the existing negative poisson's ratio warp-knitted fabric, is easy to realize, and can obtain a good negative poisson's ratio effect without a complex post-treatment process.
The invention relates to a method for manufacturing a negative Poisson ratio warp-knitted fabric, which is characterized in that elastic yarns and non-elastic yarns are woven in a symmetrical yarn laying mode by equal-quantity interval yarn threading, so that a fabric with elastic extension yarns and non-elastic extension yarns arranged at intervals in the transverse direction and the longitudinal direction in a fabric plane is formed. The manufacturing method has no special requirements on a warp knitting machine, and the negative poisson ratio warp knitted fabric can be obtained by knitting on a conventional warp knitting machine, so that the method is beneficial to batch production and has low production cost.
The method for manufacturing the negative poisson's ratio warp-knitted fabric provided by the embodiment comprises the following steps:
step S1, warping the yarn: and respectively arranging the elastic yarns and the inelastic yarns according to the tissue design requirement for sectional warping to prepare for subsequent weaving. Specifically, the elastic yarn can be elastic yarn formed by polyester high-stretch yarn or other chemical fibers or polyester fiber spandex core-spun yarn, and the non-elastic yarn can be monofilament or multifilament formed by polyester monofilament or multifilament or other chemical fibers.
Step S2, bar threading: at least one front comb is fully or empty penetrated by inelastic yarns, the specific mode is determined according to back comb penetrating yarns and fabric tissues, and the two back combs are equally and alternately penetrated by the elastic yarns and the inelastic yarns.
In this embodiment, the front comb is threaded as follows:
GB1：(1-0/0-1)×(m+n+r+h)2A，2*；
the two rear combs are threaded as follows:
GB2：(5-4/5-6)×n/(5-4/9-10)×m/(5-4/5-6)×r/(1-0/5-6)×h//2B，2*，2A，2*；
GB3：(5-6/5-4)×n/(5-6/1-0)×m/(5-6/5-4)×r/(9-10/5-4)×h//2A，2*，2B，2*；
wherein A represents inelastic yarn, B represents elastic yarn, n, m, r and h are any integers more than 1, and x represents empty penetration. The let-off quantity of GB2 and GB3 is determined by adopting a sectional let-off mode according to needs, and the threading mode of GB1 is determined according to the structure and threading of GB2, so that all longitudinal rows of basic structures formed by GB2 and GB3 are bound by the structure formed by GB1 in a looping mode in a front comb. The tissue formed by GB1 is not limited to open pillar stitch, but can also be closed pillar stitch, flat warp or other warp knitting looping stitch with binding function.
Of course, in other embodiments, the threading manner of the front comb may also be:
GB1：(1-0/0-1)×(m+n+r+h)1A，2*；
correspondingly, the threading mode of the two rear combs can be as follows:
GB2：(4-3/3-4)×n/(4-3/6-7)×m/(4-3/3-4)×r/(1-0/3-4)×h//1B，2*，1A，2*；
GB3：(3-4/4-3)×n/(3-4/1-0)×m/(3-4/4-3)×r/(6-7/4-3)×h//1A，2*，1B，2*。
step S3, weaving on a loom: weaving on a Raschel or tricot warp knitting machine with more than 3 guide bars, knitting front bars in loops, knitting back bars symmetrically laid in loops to form minimum basic units, continuously and repeatedly knitting the minimum basic units to form the fabric with elastic extension lines and non-elastic extension lines arranged at intervals in the transverse direction and the longitudinal direction in the plane of the fabric. It should be explained that at least one front bar knit loop is required in this step to bind the stitch formed by the back bar to slow the yarn transfer when the fabric is stressed, thereby enhancing the negative poisson's ratio effect of the warp knit fabric of the present invention.
As shown in fig. 3(a), the elastic stretch yarn shrinks after the fabric is taken off the machine, the inelastic stretch yarn remains unchanged, and the smallest basic unit of the fabric has a concave feature under the elastic yarn shrinkage. The schematic structure of the minimum basic unit is shown in fig. 3(b), the main body shape structure of the minimum basic unit is a concave hexagon and is composed of a wale part, an elastic extension line part and an inelastic extension line part, the elastic extension line part and the inelastic extension line part are arranged at intervals in the longitudinal direction and the transverse direction of the fabric, and the distance between the adjacent elastic extension line part and the inelastic extension line part in the longitudinal direction is greater than or equal to the height of two loops. In fig. 3(b), the line segment labeled 1, 3 represents the wale portion, which is formed by the elastic yarn and the inelastic yarn together, and the slant portion thereof may be any number of courses greater than two. The line segments denoted 2, 5, 7, 9 represent the portion of inelastic stretch thread which is formed entirely by the inelastic yarn. The segments indicated by 4, 6, 8, 10, 11 represent the portions of the elastic stretch yarn which are formed entirely by the elastic yarn. The line segments marked 1 and 3 are symmetrical, the line segments marked 2 and 7 are parallel and equal in length, the line segment marked 11 is parallel to the line segments marked 2 and 7, the line segments marked 9 and 5 are equal in length and are positioned on the same straight line overlapped with the line segment marked 1, the line segments marked 4 and 10 are equal in length and are positioned on the same straight line overlapped with the line segment marked 2, and the line segments marked 6 and 8 are equal in length and are positioned on the same straight line overlapped with the line segment marked 7. Referring to fig. 4(b), when the fabric is extended in one direction, the fabric structure dimension of the fabric perpendicular to the compression or extension direction can be increased by rotation, bending and elongation of the line segments 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 to achieve the desired negative poisson's ratio effect.
Step S4, fabric setting: and (3) tentering and setting the fabric on a heat setting machine, wherein the setting temperature is 160 ℃, and the setting time is not less than 5 minutes.
To better demonstrate the negative poisson's ratio effect of the negative poisson's ratio warp knit fabric made by the above fabrication method, we performed tensile tests on the negative poisson's ratio warp knit fabric. The poisson's ratio of the fabric was tested according to the method provided in "developing a negative poisson's ratio fabric with flat knitting machine" (Hong Hu et al, Journal of textile research, 2011, 81(14), 1493-. The test instrument used was an Instron tensile instrument. The tensile test results are shown in fig. 5, the curve denoted by a is a poisson's ratio strain curve when stretched in the longitudinal direction, and the curve denoted by B is a poisson's ratio strain curve when stretched in the transverse direction. As can be seen from fig. 5, the negative poisson ratio warp-knitted fabric exhibits a negative poisson ratio effect in a large strain range, the transverse negative poisson ratio effect is significant in a certain strain range, the fabric exhibits a large deformation capacity in the longitudinal direction, and the negative poisson ratio of the fabric changes from negative to positive as the strain increases during longitudinal stretching, no matter longitudinal stretching or transverse stretching, as long as the tensile strain is lower than 60%, the negative poisson ratio warp-knitted fabric maintains a high and stable negative poisson ratio value.
The negative poisson effect of the finally manufactured negative poisson ratio warp-knitted fabric can be optimally designed by selecting parameters such as the number of the elastic extension line parts and the inelastic extension line parts, the let-off amount, the on-machine longitudinal density and the like.
In other embodiments, the smallest basic unit may also be a concave quadrilateral structure.
In addition to using non-elastic (polyester monofilament or multifilament) and elastic (core spun or covered polyester yarn or high stretch polyester yarn or low stretch polyester yarn) yarn, those skilled in the art can select any other suitable thermoplastic fiber such as polyethylene fiber, polypropylene fiber, polyamide fiber, polyurethane fiber or any other elastic fiber according to the actual requirement, and the material of the elastic and non-elastic yarn used in the present invention can be other kinds of chemical fiber monofilament, multifilament or spun yarn.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (2)
1. A method for manufacturing a negative Poisson ratio warp-knitted fabric is characterized in that,
at least one front comb adopts non-elastic yarns to fully penetrate or empty penetrate, the specific mode is determined according to back comb threading and fabric texture, two back combs all adopt elastic yarns and non-elastic yarns to equally and alternately thread, and the threading mode is as follows:
GB2：nA，m*，nB，m*，
GB3：nA，m*，nB，m*，
wherein A represents inelastic yarn, B represents elastic yarn, n is an integer not less than 1, m is any non-negative integer, and x represents empty penetration;
weaving on a warp knitting machine with more than 3 guide bars, knitting front bars in a loop, knitting rear bars symmetrically laid yarns in a loop to form a minimum basic unit, and continuously and repeatedly knitting the minimum basic unit to form a warp knitted fabric; the smallest elementary unit is a polygon with a concave profile made up of wale portions, elastically extensible thread portions and inelastically extensible thread portions, the warp knitted fabric having a negative poisson's ratio effect in multiple directions in its plane.
2. The method of claim 1, wherein said elastic stretch yarn portion is formed by two or more adjacent lengths of elastic stretch yarn, said inelastic stretch yarn portion is formed by two or more adjacent lengths of inelastic stretch yarn, said elastic stretch yarn and said inelastic stretch yarn are alternately arranged in a longitudinal direction and a transverse direction, and a distance between said adjacent elastic stretch yarn and said inelastic stretch yarn in the longitudinal direction is greater than or equal to a height of two loops.
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| CN110629375A (en) * | 2019-09-26 | 2019-12-31 | 江南大学 | Negative Poisson ratio fabric and preparation method thereof |
| CN111529758B (en) | 2020-06-24 | 2021-05-04 | 东华大学 | Negative poisson ratio structure myocardial patch with conductive stability and preparation method thereof |
| CN112626708A (en) * | 2020-11-03 | 2021-04-09 | 东莞润信弹性织物有限公司 | Woven belt with appearance pattern changed after stretching |
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| WO2009002479A1 (en) * | 2007-06-21 | 2008-12-31 | University Of Massachusetts | Auxetic fabric structures and related fabrication methods |
| CN104911804B (en) * | 2015-07-06 | 2017-07-14 | 江南大学 | A kind of two-dimentional knitted fabric of negative poisson's ratio and its method for weaving |
| EP3341512A4 (en) * | 2015-08-26 | 2019-05-29 | The University of New Hampshire | Chiral structures with adjustable auxetic effects |
| WO2017070662A1 (en) * | 2015-10-23 | 2017-04-27 | The University Of New Hampshire | Three-dimensional structures having adjustable auxetic effects |
| CN106012271B (en) * | 2016-08-03 | 2017-08-25 | 江南大学 | A kind of preparation method with Negative poisson's ratio warp-knitted spacer fabric |
| CN106149150B (en) * | 2016-08-29 | 2019-06-11 | 香港理工大学 | A kind of negative poisson's ratio woven fabric and manufacturing method |
| CN207091629U (en) * | 2017-03-21 | 2018-03-13 | 上海八达纺织印染服装有限公司 | A kind of negative poisson's ratio woven fabric |
| CN206916373U (en) * | 2017-07-25 | 2018-01-23 | 长乐力天针纺有限公司 | A kind of broadwise strengthens screen cloth |
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2018
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