CN102425027B - Plated yarn and warp high-elasticity wave absorbing weft-knitted fabric of carbon filament core yarns and application thereof - Google Patents
Plated yarn and warp high-elasticity wave absorbing weft-knitted fabric of carbon filament core yarns and application thereof Download PDFInfo
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- CN102425027B CN102425027B CN201110288293.4A CN201110288293A CN102425027B CN 102425027 B CN102425027 B CN 102425027B CN 201110288293 A CN201110288293 A CN 201110288293A CN 102425027 B CN102425027 B CN 102425027B
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Abstract
The invention provides a plated yarn and warp high-elasticity wave absorbing weft-knitted fabric of carbon filament core yarns and application thereof. The wave absorbing weft-knitted fabric is characterized by comprising carbon filament core yarns, wherein the carbon filament core yarns comprise carbon filament bunches and other fibers clad on the outer side of the carbon filament bunches. The wave absorbing weft-knitted fabric comprises the weft-knitted fabric, and the whole or part of woven yarns of the weft-knitted fabric consist of the carbon filament core yarns. Otherwise, the wave absorbing weft-knitted fabric comprises the weft-knitted fabric and at least one of horizontal plated yarns and longitudinal warps. The woven yarns of the weft-knitted fabric do not contain the carbon filament core yarns, and the whole or part of at least one of the horizontal plated yarns and longitudinal warps consist of the carbon filament core yarns. The wave absorbing weft-knitted fabric can be used for manufacturing electromagnetic wave shielding protective clothing and other protective textiles.
Description
Technical Field
The invention relates to the technical field of electromagnetic shielding, in particular to a plating warp winding high-elasticity wave-absorbing weft-knitted fabric of carbon filament core-spun yarn and application thereof.
Background
With the increasing use of electrical equipment, electromagnetic radiation has become a new pollution. When a human body is exposed to electromagnetic radiation for a long time, the nervous system, the cardiovascular system, the endocrine system, the reproductive system and the like are damaged to different degrees. In order to protect the human body from being damaged by electromagnetic radiation or reduce the harm of the electromagnetic radiation as much as possible, people shield an electromagnetic radiation source on the one hand and reduce the radiation quantity; on the other hand, effective protective materials are developed for individual protection, and electromagnetic radiation protective fabrics are one of the materials. At present, there are two main approaches for developing fabrics with electromagnetic wave shielding function, namely, applying a coating with electromagnetic wave shielding property on the fabric for finishing, and processing the fabric with fibers with electromagnetic shielding function.
Regarding the first approach, there are many patent reports in chinese patent CN200910054882.9, which uses chemical silvering method to form a layer of silver on the surface of polyester fabric, thereby imparting electromagnetic shielding property to the fabric. Chinese patent CN200910048743.5 utilizes a chemical copper plating method to form a layer of copper on the surface of the polyester fabric, thereby imparting electromagnetic shielding property to the fabric. Chinese patent CN200610119515.9 uses a vacuum sputtering method to sputter one or more of metal aluminum, silver, iron, nickel, chromium, gold, platinum or magnesium; or one or more of the oxides of metal aluminum, silver, iron, nickel, chromium, gold, platinum or magnesium forms a film on the fabric, so that the fabric has an electromagnetic shielding effect. The metal coating is not washable, the electromagnetic shielding effect is seriously reduced after multiple times of washing, the coated fabric has thick and hard hand feeling, poor air permeability and complex process, and multiple coatings are usually required to achieve better shielding effect. This is quite different from the manner in which the composite yarns used in the present invention are woven.
In the second approach, the metal fibers are generally spun pure or blended with common clothing fibers and then woven into a fabric. The Chinese patent CN101423996A realizes electromagnetic shielding by weaving permalloy and the fabric made of the cloth yarn. Chinese patent CN1045428A is an electromagnetic shielding fabric woven from blended yarn of cotton fiber and stainless steel fiber. Chinese patent CN87103582A is an electromagnetic shielding fabric woven by using nickel fiber and spinnable flame retardant fiber blended yarn. The metal fiber has large specific gravity, and the woven fabric is thick and hard in hand feeling and has stimulation effect on skin. The second method is to make conductive fiber by metal coating on common clothing fiber, and Chinese patent CN201395671Y is to silver-plate chemical fiber filament, and then interweave with common yarn to obtain high-shielding radiation-proof fabric.
A textile made of carbon fiber can be used as an electromagnetic wave shielding material because the electrical properties of carbon fiber are similar to those of metal. The carbon fiber has a specific resistance of (1.5 to 3.0) x 10-3Omega cm is an excellent electromagnetic shielding structure material, but carbon fibers are fragile and are easy to break single fibers in the bending process. Therefore, most of the carbon fiber composite materials are applied by first performing and then coating resin to cure and shape the materials into structural materials with required shapes. The existing processing method mainly utilizes special three-dimensional weaving equipment to weave carbon filament yarns into three-dimensional fabrics, and then coats resin for shaping and cooling to obtain the composite material. In the weaving process, the carbon filament yarn is easy to break and the surface is easy to grind to form hairiness, so the carbon fiber is difficult to form into fabrics. Attempts have been made to improve the bundling performance by impregnating carbon filaments with a sizing agent such as a paste or an oil, but the use of a sizing agent for improving the bundling performance causes the carbon filaments to be coarse and hard. In the patent literature: thermoplastic resin used in Japanese unexamined patent publication No. 2-133632A durable sewing yarn made by wrapping carbon fibers with a multifilament yarn is disclosed in patent documents: in Japanese patent application laid-open No. 64-061527, a coated yarn in which carbon fibers are used as core yarns and the core yarns are covered with ultra-high molecular weight polyethylene fibers is spun by a hollow spindle spinning method, and the generation of carbon fiber hairiness is suppressed while the advantages of high strength and high modulus of carbon filaments are maintained. This is how the carbon fiber tow is protected from damage during expression.
U.S. Pat. No. USP 4237108 provides a method for preparing a carbon fiber fabric by weaving a cloth with a heat-set acrylonitrile fiber, and then subjecting the cloth to an oxidation treatment and a carbonization treatment to obtain a carbon fiber fabric. Chinese patent CN 200780014529.7 provides a method for weaving carbon fiber cloth by using an air jet loom, which takes a carbon fiber sliver with the fineness of 400-. However, the method can only weave carbon fiber unidirectional fabrics, the adjustment of weaving parameters is complex, and the warp density and the weft density are limited to a certain extent so as to prevent the carbon fiber fluffing from influencing the weaving. These are to solve the processing problem of pure carbon fiber fabric, and are completely different from the composite yarn knitting principle adopted by the invention.
The electromagnetic wave shielding fabric or the wave absorbing fabric is a woven fabric, and the electromagnetic wave shielding is carried out in a uniform mode, which is fundamentally different from the principle, the method, the structure and the application of the invention.
The knitting structure is characterized in that the knitting fabric is formed by mutually interlooping loops, so that the knitted fabric is softer than woven fabric due to the characteristic, and the patent in the aspect adopts a knitting method to prepare the radiation-proof fabric. U.S. patent No. USP 5968854 silver-coats chemical fiber filaments such as nylon to prepare conductive filament yarns, and then weaves highly conductive radiation-proof knitted fabrics using a knitted structure. The direct plating of metal on chemical fiber filament can overcome the demerits of heavy metal fiber and skin irritation, and the demerits of thick and hard hand feeling, poor air permeability and no washing resistance of metal plated fabric, but also has the problem of complicated technological process. Chinese patent CN200910181902.9 provides a method for preparing a warm-keeping radiation-proof knitted fabric, which is formed by knitting radiation-proof fiber yarns (mainly composed of metal blend fibers) and elastic yarns in the same way, wherein the front side is formed by knitting raised fibers, the inner side is formed by knitting the raised fibers, and the inner side and the front side are connected by knitting connecting yarns. However, the patent does not indicate that the radiation protection performance of the fabric can be adjusted through the texture design according to the actual radiation protection requirement. This is completely different from the carbon fiber composite yarn weft knitting adopted by the invention, which adopts different weave structures and controls the arrangement density of the fabric.
Most closely, chinese patent CN200710190584.3 provides a method for preparing carbon fiber fabric, which weaves regenerated cellulose fiber or polyacrylonitrile fiber yarn into barrier fabric, heats at high temperature to obtain graphite fiber yarn net as base fabric, and forms fabric by dry jet spinning. Although the method of weaving acrylonitrile fiber or regenerated cellulose fiber and then carbonizing the woven fabric to form the carbon fiber fabric avoids the problem of fluffing of the carbon fiber, the fiber is thermally shrunk through thermal treatment, and the fiber is deformed due to thermal shrinkage when the fabric which is not carbonized sufficiently is thermally treated, so that the appearance and the flatness of the fabric are influenced, and a large amount of energy is consumed through high-temperature treatment, so that energy is not saved sufficiently. However, this method is also a woven structure, which is to make a lattice-shaped fabric from regenerated cellulose fibers or polyacrylonitrile fibers and then carbonize the fabric to obtain an open lattice-shaped pure carbon fiber fabric, and the purpose of this method is to avoid the damage to carbon fibers in spinning and weaving, and it cannot be used as a fabric for clothing, which is different from the principle, forming mode and fabric form of this invention.
The carbon filament core-spun yarn is used, so that the carbon filament yarn well overcomes the defect that burrs are easy to form in the weaving process. The carbon filament yarns can be woven on a common weft knitting machine like common yarns, the wave-absorbing knitted fabric is provided for underwear and other textiles for electromagnetic wave shielding and protection, and the application range of the carbon filament bundle fibers is widened.
Disclosure of Invention
The invention aims to provide a high-elasticity strip-shaped wave-absorbing weft knitted fabric with rigid fibers added according to electromagnetic shielding requirements and application thereof, so as to solve the problem that the electromagnetic wave shielding fabric which can be effectively used for individual protection is lacked at present.
In order to achieve the aim, the invention provides a wave-absorbing weft-knitted fabric which is characterized by comprising carbon filament core-spun yarns, wherein the carbon filament core-spun yarns comprise carbon filament bundles and other fibers coated on the outer sides of the carbon filament bundles.
As a preferable scheme, the wave-absorbing weft-knitted fabric comprises weft-knitted fabric, and the knitting yarns of the weft-knitted fabric are all or partially composed of carbon filament core-spun yarns.
Preferably, the wave-absorbing weft-knitted fabric further comprises at least one of transverse plating and longitudinal warp winding, and the at least one of transverse plating and longitudinal warp winding is wholly or partially formed by carbon filament core-spun yarns.
More preferably, the knitting yarn is in the form of loop knitting yarn, the transverse plating yarn is in the form of at least one of loop plating yarn and half loop plating yarn, and the longitudinal warp winding is in the form of warp winding loop and back oblique line.
More preferably, the yarns of the weft-knitted fabric comprising the carbon filament core-spun yarn are arranged in a ribbon shape.
More preferably, the transverse plating yarns composed of the carbon filament core yarns are arranged in a ribbon shape.
More preferably, the longitudinal warp yarns of the carbon filament core-spun yarns are arranged in a ribbon shape.
More preferably, the transverse plating yarn composed of the carbon filament core-spun yarn and the longitudinal warp composed of the carbon filament core-spun yarn are arranged in a grid shape.
Preferably, the wave-absorbing weft-knitted fabric comprises a weft-knitted fabric and at least one of transverse plating and longitudinal wrap, the knitting yarn of the weft-knitted fabric does not contain carbon filament core-spun yarn, and at least one of the transverse plating and the longitudinal wrap is wholly or partially composed of the carbon filament core-spun yarn.
Preferably, the knitting yarn is in the form of loop knitting yarn, the transverse plating yarn is in the form of at least one of loop plating yarn and half loop plating yarn, and the longitudinal warp winding is in the form of warp winding loop and back oblique line.
More preferably, the transverse plating yarns composed of the carbon filament core yarns are arranged in a ribbon shape.
More preferably, the longitudinal warp yarns of the carbon filament core-spun yarns are arranged in a ribbon shape.
More preferably, the transverse plating yarn composed of the carbon filament core-spun yarn and the longitudinal warp composed of the carbon filament core-spun yarn are arranged in a grid shape.
Preferably, the other fibers are natural fibers or chemical synthetic fibers.
The other parts of the knitting yarns, the transverse plating yarns and the longitudinal wrap yarns of the weft-knitted fabric are composed of other fiber yarns, and the other fiber yarns are made of materials which are the same as or similar to other fibers coated on the outer side of the carbon filament core-spun yarns.
The invention also provides application of the wave-absorbing weft-knitted fabric in the aspects of manufacturing electromagnetic wave shielding protective clothing and other protective textiles. The electromagnetic wave shielding protective clothing is particularly a protective underwear for human privacy and safety, and the other protective textiles are particularly household and protective textiles such as covers, sleeves, covers, screens and the like.
Compared with the prior art, the invention has the following advantages and positive effects:
(a) because the common weft-knitted fabric can only provide uniform or transverse strip electromagnetic shielding effect, the warp winding of the invention can provide vertical strip electromagnetic shielding effect and form strip lattice and multiple electromagnetic shielding effect by combining with the transverse strip;
(b) because the extensibility of the horizontal direction of the common weft-knitted fabric is several times larger than that of the vertical direction, the plating of the invention, especially the plating without loops, can adjust the horizontal elasticity;
(c) since plating and wrap are of a loop structure, even if a rigid fiber yarn such as a carbon filament core yarn is introduced, a weft knitted fabric having the same elasticity as that of a flexible fiber yarn can be obtained because the knitted fabric is mainly deformed by loops and the elasticity of such deformation of the rigid fiber yarn is stronger;
(d) because plating and warp winding are common methods for weft knitting processing, the wave absorption of the knitted fabric can be adjusted and changed by conveniently adjusting the spacing path ratio, plating and path number or warp winding and path number of the carbon filament core-spun yarn or the coil arrangement density, so as to achieve the function of resisting electromagnetic radiation in a wide frequency band;
(e) the wave-absorbing weft-knitted fabric has high elasticity, so that the wave-absorbing weft-knitted fabric can be used for electromagnetic wave shielding protective clothing which needs high elasticity and meets the wearing requirements, in particular to protective underwear for privacy and safety of human bodies and high-grade comfortable household and protective textiles.
Drawings
FIG. 1a is a schematic diagram of a superimposed grid-shaped wave-absorbing weft-knitted fabric with a structure of all carbon filament core-spun yarns and then plated and wrapped;
FIG. 1b is a schematic view of a superimposed grid-shaped wave-absorbing weft-knitted fabric with half-turn plating and warp winding of the weave of all other fiber yarns;
FIG. 1c is a schematic view of a superimposed grid-shaped wave-absorbing weft-knitted fabric with a part of carbon filament core-spun yarn weave being plated and wound
(weave with full circle plating on other fibers, weave with half circle plating on carbon filament covering yarn);
fig. 1d is a schematic diagram of the superimposed grid-shaped wave-absorbing weft-knitted fabric in which carbon filament core-spun yarns and other fiber yarns are alternately (1' 1), namely, one by one, and then plated and wrapped.
FIG. 2a is a schematic view of a strip wave-absorbing weft-knitted fabric with a structure of a half turn plated of all carbon filament core-spun yarns;
FIG. 2b is a schematic diagram of a diamond-shaped strip wave-absorbing weft-knitted fabric with the weave of all other fiber yarns being re-plated (3 rows of full-circle plating and 3 rows of' half-circle plating and one row of left slant percent and one row of right slant and one row of dislocation);
FIG. 2c is a schematic view of a band-shaped wave-absorbing weft-knitted fabric with a part of carbon filament core-spun yarn weave plated again (full circle plated to other fiber weave, half circle plated to carbon filament core-spun yarn weave);
fig. 2d is a schematic view of a strip-like wave-absorbing weft-knitted fabric with carbon filament core yarns and other fiber yarns arranged alternately (1' 2, i.e. one way every two ways) and plated (full-turn plating 5 rows and half-turn plating 4 rows).
FIG. 3a is a schematic view of a strip wave-absorbing weft-knitted fabric with a weave of all carbon filament core-spun yarns being rewound;
FIG. 3b is a schematic view of a vertical bar-shaped wave-absorbing weft-knitted fabric with weave of all other fiber yarns and wrap;
FIG. 3c is a schematic view of a strip lattice wave-absorbing weft-knitted fabric in which a part of the carbon filament core-spun yarn is weaved and then is rewound;
FIG. 4 is a schematic structural view of a carbon filament core spun yarn;
in the figure:
1-a carbon filament core spun yarn comprising an 11-carbon filament core spun loop-knitted yarn; plating 12-carbon filament core-spun yarn loops; 13-half-turn plating of the carbon filament core-spun yarn; winding the 14-carbon filament core-spun yarn into warp loops; winding the 15-carbon filament core-spun yarn through a back oblique line;
2-other fiber yarns;
3-carbon filament bundle;
4-other fibers.
Wherein,
the TS region is a Triple electromagnetic wave Shielding functional region (TS): TS-CCC are three-dimensional curved arrangement regions (C denotes coil) each of which is a coil; TS-CLC is the three-dimensional curvature of two coils and the arrangement area of a straight line (L represents a straight line); TS-CLSc is the three-dimensional curvature of a coil, a straight line and an arrangement of half a turn (Sc denotes half a turn);
the DS area is a Double electromagnetic wave Shielding function area (DS); DS-CC are three-dimensional curved arrangement regions (C denotes coil) which are all coils; DS-CL is the three-dimensional curvature of a coil and the arrangement area of a straight line (L represents a straight line); DS-CSc is the three-dimensional curvature of a coil and the arrangement area of a half-coil;
the S area is an area with an electromagnetic wave Shielding function (S: Shielding); S-C is a three-dimensional bending arrangement area of the coil (C represents the coil); S-L is a linear arrangement region (L represents a straight line); S-Sc is a half-circle near-linear arrangement region (Sc represents a half-circle);
the NS region is a Non-electromagnetic wave Shielding functional region (NS: Non-Shielding).
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The wave-absorbing weft-knitted fabric is a high-elasticity wave-absorbing weft-knitted fabric formed by carbon filament core-spun yarns or weft knitting with other fiber yarns. The strip-shaped high-elasticity wave-absorbing weft knitted fabric is formed by sequentially stringing and sleeving a carbon filament core-spun yarn, a weaving yarn of all or at least one path of carbon filament core-spun yarns at intervals or all other fiber yarns, a strip-shaped transverse plaiting yarn, a longitudinal warp winding yarn or a carbon filament core-spun yarn fed simultaneously, and a strip-shaped high-elasticity wave-absorbing weft knitted fabric which is formed by lapping and looping or half-loop plaiting yarns in sequence, wherein the strip-shaped weaving yarn refers to the general names of strip shapes, strip lattices and grid superposition.
The knitting yarns in the wave-absorbing weft-knitted fabric are in a loop knitting yarn form; the plating of the carbon filament covering yarn has two forms of circle plating and half circle plating; the warp of the carbon filament core-spun yarn has two forms of warp winding and back oblique line. Wherein the loop is a three-dimensional curved coil; the return oblique line is a straight line; the half circle is the combination of a straight line and a bending line, and the straight line section is more than the bending section. Therefore, the wave-absorbing weft-knitted fabric has the characteristic of combining bent arrangement and straight arrangement, wherein the bent arrangement is a main body.
The wave-absorbing weft-knitted fabric is prepared by feeding plating yarns of carbon filament core-spun yarns on all carbon filament core-spun yarns or all other fiber yarns or on at least one path of alternate weft-knitted fabric of the carbon filament core-spun yarns so as to enhance the strip-shaped wave-absorbing performance; or filling or overlapping the wrap of the carbon filament core-spun yarn to form strip-shaped wave-absorbing performance; or the plating and the wrap are simultaneously fed in a strip-shaped overlapping manner to form an overlapping grid shape and have the multiple wave absorbing performance of the plating and the wrap.
The wave absorbing property of the wave absorbing weft-knitted fabric has regionality, and plaiting regions without or additionally added with carbon filament core-spun yarns or warp winding or superimposed strip lattice regions of the carbon filament core-spun yarns are single or double or triple electromagnetic shielding efficiency regions respectively on weft-knitted tissues with the carbon filament core-spun yarns; the method is characterized in that strip-shaped carbon filament core-spun yarn plaiting or warp winding or strip lattice areas superposed by the carbon filament core-spun yarn plaiting or the warp winding or the carbon filament core-spun yarn plaiting and warp winding are respectively single or double electromagnetic shielding effect areas on weft knitting tissues of other fiber yarns; and the strip area only having weft knitting of other fiber yarns is the area without electromagnetic shielding effectiveness.
The wave absorption refers to the absorption and shielding of electromagnetic waves, and can be changed by adjusting one or more of the spacing path ratio, plating and path number or warp and path number and coil arrangement density of the carbon filament core-spun yarns in the weft-knitted fabric, wherein the spacing path ratio refers to the ratio of the coil path number of the carbon filament core-spun yarns to the coil path number of other fiber yarns; the coil arrangement density refers to the number of coils in unit length and is divided into transverse density and longitudinal density; the plating and the number of the roads refer to the number of rows of plating and whether plating is performed or not; the number of warp and pass refers to the number of loops of weft knitting in the transverse direction of warp and whether warp is warp or not.
As shown in fig. 4, which is a schematic structural diagram of a carbon filament core-spun yarn, the carbon filament core-spun yarn 1 includes a carbon filament bundle 3 and other fibers 4 coated outside the carbon filament bundle 3. The carbon filament core-spun yarn 1 is placed on a creel of a common circular knitting machine, and a circular knitting machine can knit plating tissues and warp winding tissues by adopting a special knitting needle and a special sinker and a special yarn guide. The arrangement density of the yarns, the form and the size of the grid bar blocks, and the combination of the knitting yarns, the plating yarns and the warp winding tissues are combined for weft knitting to obtain three types of electromagnetic shielding weft-knitted fabrics of the invention:
(a) the wave-absorbing weft-knitted fabric with both plating and warp winding is characterized in that: examples 1 to 4, the specific process parameters are shown in table 1;
(b) plating-only wave-absorbing weft-knitted fabric: examples 5 to 8, the specific process parameters are shown in table 2;
(c) wave-absorbing weft-knitted fabric with only warp winding: examples 9 to 11, the specific process parameters are shown in Table 3.
Due to the spacing ratio of the carbon filament core-spun yarn 1 and the other fiber yarns 2; loop length and weave; the form and size of the bar; and the peak value of the electromagnetic wave shielding effectiveness (EMSE) curve of the carbon filament core-spun yarn 1 with plating or winding or the combination of the twoSE maxFrequency corresponding to peak valuef maxAnd higher electromagnetismFrequency band of wave shielding effectivenessf 1，f 2]The shape of the shielding effectiveness peak of the frequency band and the average value of the shielding effectiveness
There are effects, in which,
in the formulaf 1，f 2Respectively, the start frequency and the end frequency of the frequency band with higher electromagnetic wave shielding effectiveness. Therefore, for these three types of electromagnetic shielding plating warp and weft-wound fabrics, 11 samples of examples were subjected to measurement and calculation of electromagnetic shielding effectiveness EMSE. The results of the 5 parameters obtained are shown in tables 1, 2 and 3, respectively.
Example 1
The ramie fiber-coated carbon filament core-spun yarn is taken as weft plain ground to weave loop-knitting yarn, loop plating yarn, half loop plating yarn and winding warp yarn, and a grid electromagnetic shielding weft-knitted fabric of the carbon filament core-spun yarn is designed according to the requirements of the blurring and the shielding of private parts of a human body, as shown in figure 1 a. The plating yarn and the wrap yarn of the ramie/carbon filament core-spun yarn are overlapped on a weft plain-stitch ground structure of the same ramie/carbon filament core-spun yarn, and a strip lattice area formed by overlapping the plating yarn and the wrap yarn forms a triple electromagnetic wave shielding functional area (TS area); only the overlapped bar grid area of the plating or winding warp yarn and the ground weave forms a double electromagnetic wave shielding function area (DS area); and the lattice region where the warp and plating are not wound is formed with an electromagnetic wave shielding function region (S region). After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare high-grade and comfortable electromagnetic shielding weft-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Example 2
Nomex yarn is taken as knitting yarn to weave a weft plain stitch ground structure, Nomex fiber coated carbon filament core-spun yarn is taken as half-turn plating yarn and winding warp yarn, and a grid electromagnetic shielding weft-knitted fabric of the carbon filament core-spun yarn is designed according to the requirements of blurring and shielding of private parts of a human body, as shown in figure 1 b. The plating and warp winding yarns using the Nomex/carbon filament covering yarn are overlapped on the weft plain stitch using the Nomex yarn, and the overlapped lattice regions form a double electromagnetic wave shielding function region (DS region); only the plaid or warp winding yarn and the ground weave lattice region is formed with an electromagnetic wave shielding functional region (S region); while the areas of the bar lattice that are not wound around the warp and plating form the areas of non-electromagnetic wave shielding function (NS areas). After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare high-grade and comfortable electromagnetic shielding weft-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Example 3
The polypropylene filament-coated carbon filament core-spun yarn is taken as partial loop knitting yarn, loop plating yarn, half loop plating yarn and winding warp yarn of a weft plain-knit ground structure, and a grid electromagnetic shielding weft-knitted fabric of the carbon filament core-spun yarn is designed according to the requirements of blurring and shielding of private parts of a human body, as shown in figure 1 c. The full circle plating is carried out on the ground weave of the polypropylene filament yarn, and the half circle plating is carried out on the ground weave of the polypropylene/carbon filament core-spun yarn. The plating yarn and the wrap yarn of the polypropylene/carbon filament core-spun yarn are overlapped on a weft plain-stitch ground structure of the polypropylene/carbon filament core-spun yarn, and a strip lattice area formed by overlapping the plating yarn and the wrap yarn forms a triple electromagnetic wave shielding functional area (TS area); only plating or winding yarns are overlapped on a weft plain weave also using a polypropylene filament/carbon filament core yarn, and the overlapped bar lattice region forms a double electromagnetic wave shielding function region (DS region), and the bar block region obtained by overlapping on a weave using a polypropylene filament yarn is an electromagnetic wave shielding function region (S region). After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare high-grade and comfortable electromagnetic shielding weft-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Example 4
The Kevlar fiber-coated carbon filament core-spun yarn is taken as the loop knitting yarn, the loop plating yarn and the winding warp yarn of the part of the weft plain stitch ground structure, and the grid electromagnetic shielding weft-knitted fabric of the carbon filament core-spun yarn is designed according to the requirements of the blurring and the shielding of the private part of the human body, as shown in figure 1 d. The ground weave adopts Kevlar/carbon filament core-spun yarn and Kevlar yarn 1: 1, i.e. one way after the other. The plating yarn and the warp winding yarn of the Kevlar/carbon filament covering yarn are overlapped on the weft plain stitch, and the overlapped lattice area of the plating yarn and the warp winding yarn forms a triple electromagnetic wave shielding functional area (TS area); only the plating or warp winding yarn is overlapped on the weft plain stitch, and the overlapped lattice region of the two forms a double electromagnetic wave shielding function region (DS region), while the lattice region without the plating or warp winding yarn is formed with an electromagnetic wave shielding function region (S region). After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare high-grade and comfortable electromagnetic shielding weft-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Table 1 measured values of process parameters and EMSE5 parameters of examples 1 to 4
| Parameter examples | Example 1 | Example 2 | Example 3 | Example 4 |
| Carbon filament core spun yarn number (tex) | 90 | 120 | 80 | 100 |
| Composite ratio of carbon filament core-spun yarn | Carbon filament 72/Ramie 28 | Carbon length 50/Nomex50 | Carbon filament bundle 75/c length 25 | Carbon length 60/Kevlar40 |
| Other fibre yarn number (tex) | Ramie yarn: 52T | Nomex yarn: 70 T | Polypropylene filament yarn: 500D | Kevlar filament 650D |
| Interval ratio of knitting yarn (root: root) | All are | ― | 6:3 | 1:1 |
| Quantity of plaiting interval (root + hollow root) | (4+4)+(3+3) | 6+6 | (3+0)+(6+0) | 4+5 |
| Number of intervals (root + empty) between warp-winding yarns | 5+3 | 5+3 | 5+3 | 5+3 |
| Arrangement Density of yarn (root/5 cm) horizontal and longitudinal Density) | 45 | 45 | 45 | 45 |
| Weave structure of yarn | Weft plain knitting | Weft plain knitting | Weft plain knitting | Weft plain knitting |
| In the form of grid blocks | Circle plating winding warp orthogonal grid and half circle plating winding warp orthogonal grid | Half-turn plating warp orthogonal grid | Circle plating winding warp orthogonal grid and half circle plating winding warp orthogonal grid | Coil plaited warp orthogonal grid |
| Size of grid Bar (horizontal column' column) | 4′5 | 6′5 | 3′5+6′5 | 4′5 |
| Peak valueSE max (dB) | 30.22 | 15.53 | 26.82 | 24.79 |
| Peak frequencyf max(GHz) | 1.2 | 1.2 | 1.2 | 1.2 |
| Frequency bandf 1~f 2 (GHz) | 0.2~1.6 | 0.2~1.6 | 0.2~1.6 | 0.2~1.6 |
| Peak morphology of EMSE | Three peaks | Three peaks | Three peaks | Three peaks |
Mean of EMSE |
16.73 | 11.39 | 22.70 | 21.87 |
| Basic use | Comfortable type, wearing and household protection of leprosy | Enhanced fire retardance and home protection | Comfortable polypropylene style, wearing and household protection | Enhanced fire retardance and home protection |
Note: denier D is the weight in grams that a 9000m long fiber has; the number is the weight in grams that a 1000m long fiber has.
Example 5
The cotton fiber-coated carbon filament core-spun yarn is taken as weft plain ground to weave loop knitting yarn and half loop plating yarn, and the strip electromagnetic shielding weft knitting fabric of the carbon filament core-spun yarn is designed according to the fuzzy and shielding requirements of private parts of human bodies, as shown in figure 2 a. The plating yarn of the cotton/carbon filament core-spun yarn is overlapped on the weft plain-stitch ground structure of the cotton/carbon filament core-spun yarn, and the overlapped transverse strip area of the two forms a double electromagnetic wave shielding functional area (DS area); and the region of the cross bar without plating is formed with an electromagnetic wave shielding function region (S region). After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare high-grade and comfortable electromagnetic shielding weft-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Example 6
The wool yarn is taken as weft plain ground to weave the loop knitting yarn, the wool fiber coated carbon filament core-spun yarn is taken as loop plating yarn and half loop plating yarn, and the strip electromagnetic shielding weft-knitted fabric of the carbon filament core-spun yarn is designed according to the fuzzy and shielding requirements of private parts of a human body, as shown in figure 2 b. And (3) performing loop plating and half-loop plating of the wool/carbon filament core-spun yarn at intervals of 3 rows, and staggering one row of left oblique percent and one row of right oblique percent in each row to form the rhombic strip-shaped wave-absorbing weft-knitted fabric. The entire plated region is formed with an electromagnetic wave shielding function region (S region). After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare high-grade and comfortable electromagnetic shielding weft-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Example 7
The carbon filament core-spun yarn coated by the polyester filament is taken as partial loop knitting yarn, loop plating yarn and half loop plating yarn of the weft plain-knit ground structure, and the strip electromagnetic shielding weft-knitted fabric of the carbon filament core-spun yarn is designed according to the fuzzy and shielding requirements of private parts of a human body, as shown in figure 2 c. The full circle is plated on the other fiber weave, and the half circle is plated on the polyester long/carbon filament core-spun yarn weave. An electromagnetic wave shielding function region (S region) is formed in the full-circle plated region; half-turn plating is overlapped to the weave of the polyester long/carbon filament core-spun yarn to form a double electromagnetic wave shielding function region (DS region). After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare high-grade and comfortable electromagnetic shielding weft-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Example 8
The method comprises the steps of taking the silk fiber-coated carbon filament core-spun yarn as weft plain ground to weave loop knitting yarn, loop plating yarn and half loop plating yarn, and designing a strip electromagnetic shielding weft knitting fabric of the carbon filament core-spun yarn according to the requirements of blurring and shielding of private parts of a human body, as shown in figure 2 d. Silk/carbon filament yarns and spun yarns were blended in a ratio of 1: 2, namely, one path separates two paths. Full-turn plating and half-turn plating are performed by the following steps of 5: 4 plating. Forming a double electromagnetic wave shielding functional area (DS area) by adopting a weft plain ground weave strip area of the silk/carbon filament core-spun yarn; an electromagnetic wave shielding function region (S region) is formed in a weft plain weave band region using spun yarn. After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare high-grade and comfortable electromagnetic shielding weft-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
TABLE 2 measured values of the process parameters and EMSE5 parameters for examples 5-8
| Parameters ofExamples | Example 5 | Example 6 | Example 7 | Example 8 |
| Carbon filament core spun yarn number (tex) | 80 | 80 | 80 | 80 |
| Composite ratio of carbon filament core-spun yarn | Carbon filament bundle 75/Cotton 25 | Carbon filament bundle 75/wool 25 | Carbon filament bundle 75/polyester filament 25 | Carbon filament 75/Silk 25 |
| Other fibre yarn number (tex) | Cotton yarn: 52T | Wool yarn: 48 T | Polyester textured yarn: 48 T | Spun (silk) yarn: 60T |
| Interval ratio of knitting yarn (root: root) | All are | ― | 5:3 | 1:2 |
| Quantity of plaiting interval (root + hollow root) | 4+3 | Full, full lap plating 3' half lap plating 3 | (4+0) +(5+0) +(3+0) | Full, full lap plating 5' half lap plating 4 |
| Arrangement Density (root/5 cm) of yarn Cross Density and longitudinal Density | 40 | 40 | 40 | 40 |
| Weave structure of yarn | 1+1 rib | Weft plain knitting | Weft plain knitting | Weft plain knitting |
| In the form of grid blocks | Half-circle plating horizontal bar | Plating diamond | Plating horizontal strip | Plating horizontal strip |
| Size of grid block (horizontal row' column) | 4′0 | 5′3 | 4′0+5′0+3′0 | 1′0+2′0 |
| Peak valueSE max (dB) | 23.34 | 17.84 | 20.89 | 23.84 |
| Frequency corresponding to peak valuef max(GHz) | 1.2 | 1.2 | 1.2 | 1.2 |
| Frequency bandf 1~f 2 (GHz) | 0.2~1.6 | 0.2~1.6 | 0.2~1.6 | 0.2~1.6 |
| Peak morphology of EMSE | Three peaks | Three peaks | Three peaks | Three peaks |
Mean of EMSE |
20.23 | 14.07 | 16.37 | 20.37 |
| Basic use | Comfortable cotton style, wear and household protection | Comfortable type, wearing and household protection of maofeng style | Comfortable terylene style, wearing and household protection | Comfortable silk style, wear and household protection |
Note: 52TIs a 52-size yarn, or a 52tex yarn.
Example 9
The carbon filament core-spun yarn coated with the polyester staple fiber is taken as weft plain ground weave loop-knitted yarn and winding warp yarn, and the strip electromagnetic shielding weft-knitted fabric of the carbon filament core-spun yarn is designed according to the requirements of the fuzziness and shielding of private parts of a human body, as shown in figure 3 a. The wrap yarn of the polyester short/carbon filament core-spun yarn is overlapped on the weft plain weave, and the overlapped vertical bar area of the polyester short/carbon filament core-spun yarn and the weft plain weave forms a double electromagnetic wave shielding functional area (DS area); and the area of the vertical bar not wound around the warp is formed with an electromagnetic wave shielding function area (S area). After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare high-grade and comfortable electromagnetic shielding weft-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Example 10
The polyester filament yarn is taken as weft plain ground knitting yarn, the polyester filament yarn-coated carbon filament core-spun yarn is taken as winding warp yarn, and the strip electromagnetic shielding weft-knitted fabric of the carbon filament core-spun yarn is designed according to the requirements of the fuzziness and the shielding of the private part of a human body, as shown in figure 3 b. The electromagnetic wave shielding functional area (S area) is formed in the vertical strip area of the warp winding yarn of the polyester long/carbon long filament covering yarn; while the area of the vertical bars not wound around the warp yarns forms a region without electromagnetic wave shielding function (NS region). After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare high-grade and comfortable electromagnetic shielding weft-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Example 11
The carbon filament core-spun yarn wrapped by the nylon filament is taken as the partial loop knitting yarn and the winding warp yarn of the weft plain stitch, and the strip electromagnetic shielding weft knitting fabric of the carbon filament core-spun yarn is designed according to the fuzzy and shielding requirements of private parts of human bodies, as shown in figure 3 c. The plating yarn of the nylon-long/carbon filament core-spun yarn is overlapped on a weft plain-stitch ground structure of the nylon-long/carbon filament core-spun yarn, a double electromagnetic wave shielding functional area (DS area) is formed in a strip lattice area overlapped with the weft plain-stitch ground structure of the nylon-long/carbon filament core-spun yarn, and an electromagnetic wave shielding functional area (S area) is formed in a strip lattice area overlapped with the ground structure of the wool/nylon composite yarn; the electromagnetic wave shielding function area (S area) is formed in the weaving bar area of the brocade length/carbon filament covering yarn without winding the warp yarns, and the electromagnetic wave shielding function free area (NS area) is formed in the weaving bar area of the wool/brocade composite yarn without winding the warp yarns. After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare high-grade and comfortable electromagnetic shielding weft-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
TABLE 3 measured values of the process parameters and the EMSE5 parameters for examples 9-11
| Parameter examples | Example 9 | Example 10 | Example 11 |
| Carbon filament core spun yarn number (tex) | 100 | 100 | 100 |
| Composite ratio of carbon filament core-spun yarn | Carbon filament 70/polyester staple 30 | Carbon filament 65/polyester filament 35 | Carbon filament 65/brocade length 35 |
| Other fibre yarn number (tex) | Polyester yarn: 61T | Polyester filament yarn: 600D | Wool/nylon composite yarn: 50T |
| Interval ratio of knitting yarn (root: root) | All are | ― | 6:3 |
| Number of interval wrap (root + hollow root) | 5+3 | 5+3 | 5+3 |
| Arrangement Density of yarn (root/5 cm) horizontal and longitudinal Density) | 45 | 45 | 45 |
| Weave structure of yarn | 1.62 | 1.64 | 1.64 |
| In the form of grid blocks | Warp winding vertical bar | Warp winding vertical bar | Warp knitting and winding strip lattice |
| Size of grid block (horizontal row' column) | 0′5 | (0′5 | 6′5 |
| Peak valueSE max (dB) | 20.98 | 10.90 | 18.99 |
| Peak frequencyf max(GHz) | 1.2 | 1.2 | 1.2 |
| Frequency bandf 1~f 2 (GHz) | 0.2~1.6 | 0.2~1.6 | 0.2~1.6 |
| Peak morphology of EMSE | Three peaks | Three peaks | Three peaks |
| Mean of EMSE (dB) | 18.23 | 8.98 | 15.98 |
| Basic use | Comfortable terylene style, wearing and household protection | Comfortable terylene style, wearing and household protection | Comfortable type, wearing and household protection of maofeng style |
Note: denier D is the weight in grams that a 9000m long fiber has; the number is the weight in grams that a 1000m long fiber has.
Claims (8)
1. The wave-absorbing weft-knitted fabric is characterized by comprising carbon filament core-spun yarns, wherein the carbon filament core-spun yarns comprise carbon filament bundles and other fibers coated on the outer sides of the carbon filament bundles; the wave-absorbing weft-knitted fabric comprises a weft-knitted fabric, wherein the knitting yarn of the weft-knitted fabric is wholly or partially composed of carbon filament core-spun yarn; the wave-absorbing weft-knitted fabric also comprises at least one of transverse plating and longitudinal wrap, and the whole or part of at least one of the transverse plating and the longitudinal wrap is formed by carbon filament core-spun yarns.
2. The wave absorbing weft knitted fabric of claim 1, wherein the yarns of the weft knitted fabric of carbon filament core yarns are arranged in a ribbon.
3. The wave-absorbing weft-knitted fabric is characterized by comprising carbon filament core-spun yarns, wherein the carbon filament core-spun yarns comprise carbon filament bundles and other fibers coated on the outer sides of the carbon filament bundles; the wave-absorbing weft-knitted fabric comprises a weft-knitted fabric and at least one of transverse plating and longitudinal wrap, wherein the knitting yarn of the weft-knitted fabric does not contain carbon filament core-spun yarn, and at least one of the transverse plating and the longitudinal wrap is wholly or partially composed of the carbon filament core-spun yarn.
4. The wave-absorbing weft-knitted fabric according to claim 1 or 3, characterized in that said knitting yarn is in the form of loop knitting yarn, said transverse plating is in the form of at least one of loop plating and half loop plating, and said longitudinal warp winding is in the form of warp winding loops and back slashes.
5. A wave-absorbing weft knitted fabric according to claim 1 or 3, characterized in that the transverse plating of carbon filament core yarns is arranged in the form of a ribbon.
6. A wave-absorbing weft knitted fabric according to claim 1 or 3, wherein the longitudinal warp windings of carbon filament core yarn are arranged in the form of strips.
7. A wave-absorbing weft knitted fabric according to claim 1 or 3, characterized in that the transverse plating of carbon filament core yarns and the longitudinal warp of carbon filament core yarns are arranged in a grid.
8. Use of the wave-absorbing weft-knitted fabric according to claim 1 or 3 for the manufacture of electromagnetic wave shielding protective clothing and other protective textiles.
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| CN2178932Y (en) * | 1993-05-20 | 1994-10-05 | 王亮 | Textile for decoration with shield |
| DE20221735U1 (en) * | 2002-10-22 | 2007-04-19 | Schumacher, Rolf | Warp knitted fabric with inserted weft yarn, e.g. for curtains, includes a conducting yarn in the main fabric or as inserted weft |
| CN201290349Y (en) * | 2008-10-08 | 2009-08-19 | 解彦炯 | Screen bellyband |
| CN201678812U (en) * | 2010-02-11 | 2010-12-22 | 汕头市奥山服饰有限公司 | Radiation-proof knit fabric |
| CN101942729A (en) * | 2009-07-08 | 2011-01-12 | 汕头市奥山服饰有限公司 | Fabric capable of preventing electromagnetic radiation |
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| JP5184797B2 (en) * | 2006-04-11 | 2013-04-17 | 松山毛織株式会社 | Electromagnetic wave / acoustic absorption yarn, electromagnetic wave / acoustic absorption fabric, electromagnetic wave / acoustic absorption sheet, electromagnetic wave / acoustic absorption plate and electromagnetic wave / acoustic absorption structure |
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|---|---|---|---|---|
| CN2178932Y (en) * | 1993-05-20 | 1994-10-05 | 王亮 | Textile for decoration with shield |
| DE20221735U1 (en) * | 2002-10-22 | 2007-04-19 | Schumacher, Rolf | Warp knitted fabric with inserted weft yarn, e.g. for curtains, includes a conducting yarn in the main fabric or as inserted weft |
| CN201290349Y (en) * | 2008-10-08 | 2009-08-19 | 解彦炯 | Screen bellyband |
| CN101942729A (en) * | 2009-07-08 | 2011-01-12 | 汕头市奥山服饰有限公司 | Fabric capable of preventing electromagnetic radiation |
| CN201678812U (en) * | 2010-02-11 | 2010-12-22 | 汕头市奥山服饰有限公司 | Radiation-proof knit fabric |
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