CN110468496B - Compression elastic modulus split warp knitting spacer fabric and preparation method thereof - Google Patents
Compression elastic modulus split warp knitting spacer fabric and preparation method thereof Download PDFInfo
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- CN110468496B CN110468496B CN201910901860.5A CN201910901860A CN110468496B CN 110468496 B CN110468496 B CN 110468496B CN 201910901860 A CN201910901860 A CN 201910901860A CN 110468496 B CN110468496 B CN 110468496B
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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
- 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
- D04B21/06—Patterned fabrics or articles
- D04B21/08—Patterned fabrics or articles characterised by thread material
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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
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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
- D10B2331/02—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
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/061—Load-responsive characteristics elastic
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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
- D10B2505/00—Industrial
- D10B2505/08—Upholstery, mattresses
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Woven Fabrics (AREA)
Abstract
A compressive elastic modulus split warp-knitted spacer fabric and a preparation method thereof belong to the field of warp-knitted spacer fabrics. The separation into regions of different compressive elastic modulus in the width direction is achieved by: 1. the spacer layer is woven by chemical fiber monofilaments with different bending stiffness; 2. different threading modes are adopted in the weaving process; 3. in the post-finishing process, the large compressive elastic modulus region and the medium compressive elastic modulus region are treated by stiffening agents in different proportions, or the large compressive elastic modulus region and the medium compressive elastic modulus region are woven by low-melting yarns in different proportions, and after heat-setting, the different regions show different compressive elastic moduli. The impact fatigue deformation rate of the large, medium and small compressive elastic modulus regions is less than 8%, and the compressive stress value CV of the small compressive elastic modulus is smaller than that of the small compressive elastic modulus region 40 5 to 8kpa; the medium compressive elastic modulus region is 9-12 kpa, and the large compressive elastic modulus is more than 13kpa. The production difficulty is reduced, the production process is simplified, the production efficiency is improved, and the product performance is excellent.
Description
Technical Field
The invention relates to the field of warp-knitted spacer fabrics, in particular to an ergonomic compressive elastic modulus split warp-knitted spacer fabric and a preparation method thereof.
Background
The three-dimensional warp knitted spacer fabric is used as a novel pad material, and is widely applied to the fields of mattresses, cleaning pads, infant climbing pads, yoga pads, seat cushions and the like in recent years. However, warp knitted spacer fabrics on the market today are mostly based on the same product with the same compressive modulus of elasticity, and the compressive modulus of elasticity is the same for each part of the fabric. When a human body lies on the mattress, the extrusion degrees of different parts of the human body on all parts of the mattress are different, for example, the extrusion of shoulders and buttocks on the mattress is larger, and the extrusion of waist on the mattress is relatively smaller. Under such conditions, it is desirable that the shoulder and hip regions of the mattress bladder material have a relatively low modulus of compressive elasticity, have excellent containment properties, minimize compression of the mattress to the human body, and the waist region have a relatively high modulus of compressive elasticity, have excellent support properties, and allow the human spine to be in a natural state. However, the existing market products have certain limitations, the product structure does not conform to human engineering, and the user experience is poor.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides the compressive elastic modulus split warp knitted spacer fabric and the preparation method thereof, which not only can prepare the compressive elastic modulus split warp knitted spacer fabric material with more excellent performance, but also can greatly reduce the existing production difficulty and improve the production efficiency.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the compressive elastic modulus split warp knitted spacer fabric comprises areas with different compressive elastic moduli, namely a small compressive elastic modulus area, a medium compressive elastic modulus area and a large compressive elastic modulus area; the surface layers of the small compressive elastic modulus region, the medium compressive elastic modulus region and the large compressive elastic modulus region are respectively made of colored yarns with different colors; the spacer layer raw materials in the areas with different compressive elastic moduli are woven by chemical fiber monofilaments with different flexural rigidity; the high compressive elastic modulus region is knitted by adopting one or more of polypropylene monofilaments and polyethylene terephthalate (PET) monofilaments with high bending rigidity; the small compressive elastic modulus region is knitted by one or more of polyamide monofilaments, polytrimethylene terephthalate (PTT) monofilaments and polybutylene terephthalate (PBT) monofilaments with low bending rigidity; the middle compressive elastic modulus region is woven by modified polyester monofilaments with medium bending rigidity or mixed monofilaments with high bending rigidity and monofilaments with low bending rigidity.
The modified polyester monofilament with the medium bending rigidity is formed by mixing and spinning PET and PBT or PTT slices, or the modified polyester monofilament with the medium bending rigidity is a sheath-core structure monofilament formed by taking PET as a core layer and taking PBT or PTT as a skin layer.
The mixing ratio of PET and PBT or PTT of the modified polyester monofilament with medium bending rigidity is 4:1-1:4; in the sheath-core structure monofilament, the ratio of the sheath layer to the core layer is 1:2-1:5.
When the monofilament with higher bending rigidity and the monofilament with lower bending rigidity are adopted for mixed knitting in the middle compressive elastic modulus region, the mixing ratio of the monofilament with higher bending rigidity and the monofilament with lower bending rigidity is 5:1-1:5.
The areas with different compressive elastic modulus adopt different threading modes to realize the difference of the compressive elastic modulus.
The large compression elastic modulus region is penetrated by 1-5 in the 2-hole in the spacing guide bar, the small compression elastic modulus region is penetrated by 1-2-hole in the 1-5-hole in the spacing guide bar, and the medium compression elastic modulus region is penetrated by 1-hole in the spacing guide bar.
The large compressive elastic modulus region and the medium compressive elastic modulus region are treated by a stiffening agent in the after-finishing process so that the compressive elastic modulus of the large compressive elastic modulus region and the medium compressive elastic modulus region are different; the stiffening agent adopts one or more of polypropylene resin, polyimide resin, polyester resin and polyamide resin.
The spacer wires in the large compressive elastic modulus region are woven by adopting sheath-core structure low-melting-point wires with lower sheath melting point and higher core layer melting point, the medium compressive elastic modulus region is woven by adopting low-melting-point wires and conventional chemical fiber wires in a mixed manner, and the small compressive elastic modulus region is woven by adopting conventional chemical fiber wires.
The impact fatigue deformation rate of the large compressive elastic modulus region is less than 8%, and the compressive stress value CV is smaller than that of the large compressive elastic modulus region 40 Greater than 13kpa; the impact fatigue deformation rate of the small compressive elastic modulus region is less than 8%, and the compressive stress value CV is smaller than that of the small compressive elastic modulus region 40 5 to 8kpa; the impact fatigue deformation rate of the medium compressive elastic modulus region is less than 8%, and the compressive stress value CV is smaller than that of the medium compressive elastic modulus region 40 9 to 12kpa.
The preparation method of the compressive elastic modulus split warp knitting spacer fabric material comprises the following steps:
1) Designing the width and the number of large, medium and small compressive elastic modulus areas of a finished product according to the human engineering requirements, designing the total warping number of monofilaments and face yarns, and designing and arranging the number of monofilaments with different bending stiffness and the number of face yarns with different colors according to the width and the number of the large, medium and small compressive elastic modulus areas of the finished product;
2) Warping the monofilaments and the surface yarns into a pan head required by weaving according to the designed warping number and the arrangement rule for weaving production;
3) According to the design requirement, the monofilament pan heads are arranged on a warp beam of a loom according to a certain rule, and are penetrated and woven according to the designed technological requirement;
4) And shaping and finishing the weaving blank at a certain temperature and at a certain speed according to design requirements and the characteristics of the monofilaments with different bending rigidity and the monofilaments with low melting point of the sheath core.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
1. the spacer layers of the large, medium and small compressive elastic modulus areas adopt chemical fiber materials with different bending rigidities, and conventional simplified and convenient production of the split products is realized by utilizing a weaving and mixed weaving process or a finishing process, so that the existing production difficulty is reduced, the production process is simplified, and the production efficiency is improved.
2. The invention can adopt different threading processes, and produce products with different compressive elastic modulus in each region by using the same raw material, thereby improving the added value of the finished product.
3. Because the middle compression elastic modulus region is produced by adopting a novel modified monofilament with medium bending rigidity, the monofilament has excellent elasticity, and the produced split product has excellent compression fatigue resistance, the mattress finished product can not have the problem of local collapse, and meets the requirement of human engineering.
Drawings
FIG. 1 is a schematic view of the structure of regions with different compressive elastic moduli of large, medium and small;
FIG. 2 is a schematic cross-sectional view of a modified polyester monofilament of sheath-core structure;
FIG. 3 is a schematic representation of a seven-segment warp knit spacer fabric of example 1;
FIG. 4 is a schematic representation of a five-segment warp knit spacer fabric of example 2.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear and obvious, the invention is further described in detail below with reference to the accompanying drawings and embodiments.
According to the human engineering requirements, the split warp-knitted spacer fabric is designed into 3-7 areas with different compressive elastic modulus in the width (transverse) direction of the product, wherein the areas comprise a small compressive elastic modulus area, a medium compressive elastic modulus area and a large compressive elastic modulus area, and the surface layers of the areas with the large compressive elastic modulus, the medium compressive elastic modulus area and the small compressive elastic modulus area are respectively distinguished by different colored yarns.
The difference in compressive modulus of elasticity in the different regions can be achieved by:
(1) The interlayer raw materials in the areas with different compressive elastic modulus are woven by chemical fiber monofilaments with different flexural rigidity;
(2) The weaving process of the areas with different compressive elastic modulus adopts different threading modes to realize the different compressive elastic modulus;
(3) In the post-finishing process of the blank fabric with the same compressive elastic modulus, the large compressive elastic modulus area and the middle compressive elastic modulus area are treated by stiffening agents with different proportions to achieve the compressive elastic modulus difference of different areas of the final product, or the large compressive elastic modulus area and the middle compressive elastic modulus area are woven by low-melting yarns with different proportions, and after heat setting, the compressive elastic modulus of the different areas is different.
The high compressive elastic modulus region can be selected from one or more of polypropylene monofilaments and polyethylene terephthalate monofilaments with high bending rigidity, the small compressive elastic modulus region can be selected from one or more of polyamide monofilaments, polypropylene terephthalate monofilaments and polybutylene terephthalate monofilaments with low bending rigidity, and the medium compressive elastic modulus region can be selected from modified polyester monofilaments with medium bending rigidity or from monofilaments with high bending rigidity and monofilaments with low bending rigidity through mixed braiding in different proportions.
As shown in FIG. 1, the structural schematic diagram of large, medium and small areas with different compressive elastic modulus woven by monofilaments with different flexural rigidity is adopted, the small compressive elastic modulus area woven by PTT monofilaments is a soft area, the large compressive elastic modulus area woven by PET monofilaments is a hard area, and the medium compressive elastic modulus area woven by PTT and PET mixed is a medium hard area.
The modified polyester monofilament with medium bending rigidity can be formed by mixing and spinning PET and PBT or PTT slices according to different proportions, or can also be produced by taking PET as a core layer and PBT or PTT as a skin layer, so as to produce the monofilament with a sheath-core structure, as shown in figure 2.
The invention weaves on an HDR6 type double needle bar warp knitting machine with six guide bars, the guide bars are arranged from the front to the back of the machine and are respectively face guide bars GB1 and GB2 which are knitted on a front needle bar, spacing guide bars GB3 and GB4 which are knitted on a front needle bar and a back needle bar in turn, and bottom guide bars GB5 and GB6 which are knitted on a back needle bar.
The face guide bars GB1 and GB2 penetrate yarns with different colors according to design requirements, the interval guide bars GB3 and GB4 penetrate monofilaments with different bending stiffness respectively according to the design requirements, and the bottom guide bars GB5 and GB6 penetrate yarns with the same color or different colors according to the design requirements.
The warp-knitted spacer fabric is characterized in that the large compressive elastic modulus region of the warp-knitted spacer fabric is penetrated by a 2-space 1-5-space 1-space mode of a spacing comb GB3 and GB4, the small compressive elastic modulus region is 1 through 2 void-1 through 5 void, and the medium compressive elastic modulus region is 1 through 1 void.
In the post-finishing process, the high compressive elastic modulus region and the medium compressive elastic modulus region can be subjected to stiffening treatment by adopting one or more stiffening agents such as polypropylene resin, polyimide resin, polyester resin, polyamide resin and the like in different proportions.
In the invention, the surface yarn or the spacer yarn in the large compressive elastic modulus region can be woven by adopting sheath-core structure low-melting-point yarn with lower melting point of the sheath layer and higher melting point of the core layer, the medium compressive elastic modulus region is woven by adopting low-melting-point yarn and conventional chemical fiber yarn according to different proportions, and the small compressive elastic modulus region is woven by adopting conventional chemical fiber yarn.
The impact fatigue deformation rate of the large compressive elastic modulus region is less than 8 percent (according to the test of GB/T18941-2003), and the compressive stress value isCV 40 Above 13kpa (according to the standard GB/T18942.1 test), the impact fatigue deformation rate of the small compressive elastic modulus region is less than 8%, and the compressive stress value CV 40 5 to 8kpa; the impact fatigue deformation rate of the medium compressive elastic modulus region is less than 8%, and the compressive stress value CV is smaller than that of the medium compressive elastic modulus region 40 9 to 12kpa.
The mixing proportion of PET and PBT or PTT is 4:1-1:4 in the mixed spinning process of the modified polyester monofilament with medium bending rigidity; when PET is used as a core layer and PBT or PTT is used as a skin layer to produce the monofilament with a skin-core structure, the ratio of the skin layer to the core layer is 1:2-1:5.
When the monofilament with higher bending rigidity and the monofilament with lower bending rigidity are adopted for mixed knitting in the middle compressive elastic modulus region, the mixing ratio of the monofilament with higher bending rigidity and the monofilament with lower bending rigidity is 5:1-1:5.
The thickness of the split warp-knitted spacer fabric can be 5-60 mm, and the weight per unit area can be 800-2000 g/square meter. The mesh shape of the surface layer adopts one of equilateral triangle, diamond, rectangle and regular hexagon, and the arrangement mode of the spacing wires adopts one of 1-shaped, V-shaped, X-shaped and 1X 1-shaped.
The preparation method of the split warp knitting spacer fabric material mainly comprises the following steps:
(1) Designing the width and the number of large, medium and small compressive elastic modulus areas of a finished product according to the human engineering requirements, designing the total warping number of monofilaments and face yarns, and designing and arranging the number of monofilaments with different bending stiffness and the number of face yarns with different colors according to the width and the number of the large, medium and small compressive elastic modulus areas of the finished product;
(2) Warping the monofilaments and the surface yarns into a pan head required by weaving according to the designed warping number and the arrangement rule for weaving production;
(3) According to the design requirement, the monofilament pan heads are arranged on a warp beam of a loom according to a certain rule, and are penetrated and woven according to the designed technological requirement;
(4) And shaping and finishing the weaving blank at a certain temperature and at a certain speed according to design requirements and the characteristics of the monofilaments with different bending rigidity and the monofilaments with low melting point of the sheath core.
The present invention is specifically described below with reference to examples 1 and 2.
Example 1
(1) Seven-zone fabric design and warping and yarn-discharging
According to the ergonomic requirement, the product is designed into 7 areas with large, medium and small compressive elastic modulus along the width direction, and the areas are respectively from left to right: a first region, a second region, a third region, a fourth region, a fifth region, a sixth region and a seventh region; the corresponding width of each zone is: 28. 34, 21, 34, 28; the compressive modulus of elasticity corresponding to each region is: medium, small, large, small, medium, i.e.: medium hard zone, soft zone, medium hard zone, as shown in fig. 3.
The number of the face yarn warping heads corresponding to GB1 and GB6 is 180 (each pan head), the total number of the face yarn warping heads corresponding to GB2 and GB5 is 360 (each pan head), and the number of the monofilament warping heads corresponding to GB3 and GB4 is 179 (each pan head). The rules of the yarn arrangement of the face yarn and the monofilament corresponding to each region are as follows (the yarn arrangement of the 4 th, 5 th and 6 th disc heads are respectively the same as the 1 st, 2 nd and 3 rd disc heads):
(2) Production of warping heads
According to the design of the step (1), the monofilaments and the surface yarns are warping into the required pan head for weaving production. The number of each pan head is shown in the step (1) according to the warping and yarn discharging rule of each pan head, the first group of the face yarn pan heads are GB1-1 to GB1-6, the second group of the face yarn pan heads are GB2-1 to GB2-6, the third group of the monofilament pan heads are GB3-1 to GB3-6, the fourth group of the monofilament pan heads are GB4-1 to GB4-6, the fifth group of the face yarn pan heads are GB5-1 to GB5-6, and the sixth group of the face yarn pan heads are GB6-1 to GB6-6.
(3) Weaving process design and upper shaft production
And placing the pan heads of each group on a warp beam of a loom according to the sequence of 1-6, and penetrating and weaving according to the following technological requirements. The product was knitted by the air-through method on a karl Mayer E16 machine with a needle bed gauge of 20mm, a knitting density of 8wpc, and a production count of 2.
The process organization is as follows:
GB1:2-2/0-0/0-0/2-2/2-2/1-1/1-1/3-3/3-3/1-1/1-1/2-2//
GB2:0-1/1-0//
GB3:0-1/0-1/5-6/5-6//
GB4:1-0/1-0/6-5/6-5//
GB5:0-1/1-0//
GB6:2-2/0-0/0-0/2-2/2-2/1-1/1-1/3-3/3-3/1-1/1-1/2-2//
the raw materials and the hollow thread are as follows:
(4) Shaping and finishing production
The blank product produced by weaving is shaped at a certain temperature and speed and then is finished, so that meshes and various performances of the blank product meet the design requirements. The setting speed is 12-18 m/min, and the temperature is 140-180 ℃.
The specific parameters of each region after shaping are shown in table 1:
TABLE 1
Example 2
(1) Fifth, dividing strip fabric design and warping and yarn discharging:
according to the ergonomic requirement, the product is designed into 5 areas with large, medium and small compressive elastic modulus along the width direction, and the areas from left to right are respectively: a first zone, a second zone, a third zone, a fourth zone and a fifth zone; the corresponding width of each zone is: 62. 21, 34, 21, 62; the compressive modulus of elasticity corresponding to each region is: medium, large, small, large, medium, i.e.: medium hard zone, soft zone, hard zone, medium hard zone, as shown in fig. 4.
The number of the face yarn warping heads corresponding to GB1 and GB6 is 180 (each pan head), the total number of the face yarn warping heads corresponding to GB2 and GB5 is 360 (each pan head), and the number of the monofilament warping heads corresponding to GB3 and GB4 is 179 (each pan head). The rules of the yarn arrangement of the face yarn and the monofilament corresponding to each region are as follows (the yarn arrangement of the 4 th, 5 th and 6 th disc heads are respectively the same as the 1 st, 2 nd and 3 rd disc heads):
(2) Production of warping heads
According to the design of the step (1), the monofilaments and the surface yarns are warping into the required pan head for weaving production. The number of each of the six groups of the heads is six, the threading rule of each of the heads is shown in the step (1), each of the heads is numbered after warping is completed, the first group of the face yarn heads is GB1-1 to GB1-6, the second group of the face yarn heads is GB2-1 to GB2-6, the third group of the monofilament heads is GB3-1 to GB3-6, the fourth group of the monofilament heads is GB4-1 to GB4-6, the fifth group of the face yarn heads is GB5-1 to GB5-6, and the sixth group of the face yarn heads is GB6-1 to GB6-6.
(3) Weaving process design and upper shaft production
And placing the pan heads of each group on a warp beam of a loom according to the sequence of 1-6, and penetrating and weaving according to the following technological requirements. The product was knitted by the air-through method on a karl Mayer E16 machine with a needle bed gauge of 20mm, a knitting density of 8wpc, and a production count of 2.
The process organization is as follows:
GB1:2-2/0-0/0-0/2-2/2-2/1-1/1-1/3-3/3-3/1-1/1-1/2-2//
GB2:0-1/1-0//
GB3:0-1/0-1/5-6/5-6//
GB4:1-0/1-0/6-5/6-5//
GB5:0-1/1-0//
GB6:2-2/0-0/0-0/2-2/2-2/1-1/1-1/3-3/3-3/1-1/1-1/2-2//
the raw materials and the hollow thread are as follows:
(4) Shaping and finishing production
The blank product produced by weaving is shaped at a certain temperature and speed and then is finished, so that meshes and various performances of the blank product meet the design requirements. The setting speed is 12-18 m/min, and the temperature is 140-180 ℃.
The specific parameters of each region after shaping are shown in table 2:
TABLE 2
The width of the large, medium and small compressive elastic modulus areas can be freely designed according to the human engineering requirements, the surface yarns select color yarns with different colors according to the design to distinguish the different compressive elastic modulus areas, and a relatively special novel chemical fiber material is used, and the conventional simple production of the compressive elastic modulus split product is realized by utilizing a weaving and braiding process or a finishing process. Because the novel modified monofilament is selected for production in the middle compression elastic modulus region, the material is excellent in elasticity and compression fatigue resistance, and the mattress product produced by the novel modified monofilament does not have the problem of local collapse, so that the difficulty of production can be greatly reduced, the production process is simplified, and the production efficiency is improved.
Claims (7)
1. The compression elastic modulus divides strip warp knitting spacer fabric, its characterized in that: the device comprises areas with different compressive elastic modulus, namely a small compressive elastic modulus area, a medium compressive elastic modulus area and a large compressive elastic modulus area; the surface layers of the small compressive elastic modulus region, the medium compressive elastic modulus region and the large compressive elastic modulus region are respectively made of colored yarns with different colors; the spacer layer raw materials in the areas with different compressive elastic moduli are woven by chemical fiber monofilaments with different flexural rigidity; the high compressive elastic modulus region is knitted by adopting one or more of polypropylene monofilaments and polyethylene terephthalate monofilaments with high bending rigidity; the small compressive elastic modulus region is knitted by one or more of polyamide monofilaments, polytrimethylene terephthalate monofilaments and polybutylene terephthalate monofilaments with low bending rigidity; the middle compressive elastic modulus region is woven by modified polyester monofilaments with medium bending rigidity or mixed monofilaments with high bending rigidity and monofilaments with low bending rigidity;
the modified polyester monofilament with the medium bending rigidity is formed by mixing and spinning PET and PBT or PTT slices, or is a sheath-core structure monofilament formed by taking PET as a core layer and taking PBT or PTT as a skin layer;
the areas with different compressive elastic modulus adopt different threading modes to realize the difference of the compressive elastic modulus;
the large compressive elastic modulus region and the medium compressive elastic modulus region are treated by a stiffening agent in the after-finishing process so that the compressive elastic modulus of the large compressive elastic modulus region and the medium compressive elastic modulus region are different;
the large compression elastic modulus region is penetrated by 1-5 in the 2-hole in the spacing guide bar, the small compression elastic modulus region is penetrated by 1-2-hole in the 1-5-hole in the spacing guide bar, and the medium compression elastic modulus region is penetrated by 1-hole in the spacing guide bar.
2. The compression elastic modulus split warp knit spacer fabric of claim 1 wherein: the PET and PBT or PTT mixed proportion of the modified polyester monofilament with medium bending rigidity is 4:1-1:4; in the sheath-core structure monofilament, the ratio of the sheath layer to the core layer is 1:2-1:5.
3. The compression elastic modulus split warp knit spacer fabric of claim 1 wherein: when the monofilament with higher bending rigidity and the monofilament with lower bending rigidity are mixed and woven in the middle compressive elastic modulus region, the mixing ratio of the monofilament with higher bending rigidity to the monofilament with lower bending rigidity is 5:1-1:5.
4. The compression elastic modulus split warp knit spacer fabric of claim 1 wherein: the stiffening agent adopts one or more of polypropylene resin, polyimide resin, polyester resin and polyamide resin.
5. The compression elastic modulus split warp knit spacer fabric of claim 1 wherein: the spacer wires in the large compressive elastic modulus region are woven by adopting sheath-core structure low-melting-point wires with lower sheath melting point and higher core layer melting point, the medium compressive elastic modulus region is woven by adopting low-melting-point wires and conventional chemical fiber wires in a mixed manner, and the small compressive elastic modulus region is woven by adopting conventional chemical fiber wires.
6. The compression elastic modulus split warp knit spacer fabric of claim 1 wherein: the impact fatigue deformation rate of the large compressive elastic modulus region is less than 8%, and the compressive stress value CV is smaller than that of the large compressive elastic modulus region 40 Greater than 13kpa; the impact fatigue deformation rate of the small compressive elastic modulus region is less than 8%, and the compressive stress value CV is smaller than that of the small compressive elastic modulus region 40 5-8 kpa; the impact fatigue deformation rate of the medium compressive elastic modulus region is less than 8%, and the compressive stress value CV is smaller than that of the medium compressive elastic modulus region 40 9 to 12kpa.
7. A method for preparing a split warp knit spacer fabric material employing a compressive elastic modulus as claimed in claim 1, comprising the steps of:
1) Designing the width and the number of large, medium and small compressive elastic modulus areas of a finished product according to the human engineering requirements, designing the total warping number of monofilaments and face yarns, and designing and arranging the number of monofilaments with different bending stiffness and the number of face yarns with different colors according to the width and the number of the large, medium and small compressive elastic modulus areas of the finished product;
2) Warping the monofilaments and the surface yarns into a pan head required by weaving according to the designed warping number and the arrangement rule for weaving production;
3) According to the design requirement, the monofilament pan heads are arranged on a warp beam of a loom according to a certain rule, and are penetrated and woven according to the designed technological requirement;
4) And shaping and finishing the weaving blank at a certain temperature and at a certain speed according to design requirements and the characteristics of the monofilaments with different bending rigidity and the monofilaments with low melting point of the sheath core.
Priority Applications (1)
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