CN102505324B - Wave-absorbing warp knitted fabric of carbon filament covering yarn chaining elastic structure and application of wave-absorbing warp knitted fabric - Google Patents
Wave-absorbing warp knitted fabric of carbon filament covering yarn chaining elastic structure and application of wave-absorbing warp knitted fabric Download PDFInfo
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Abstract
The invention provides a wave-absorbing warp knitted fabric of a carbon filament covering yarn chaining elastic structure and application of the wave-absorbing warp knitted fabric. The wave-absorbing warp knitted fabric is characterized in that the wave-absorbing warp knitted fabric is manufactured by a multi-guide-bar chaining method of warp knitted processing, the multi-guide-bar chain method includes that carbon filament covering yarns, other fiber yarns or a combination of the carbon filament covering yarns and the other fiber yarns are mutually serially sleeved to form multiple lines of coils, the carbon filament covering yarns, the other fiber yarns or the combination of the carbon filament covering yarns and the other fiber yarns are in weft insertion back and forth to form the chaining elastic structure which is the wave-absorbing warp knitted fabric exactly, and at least one of the multiple lines of coils and weft inserts is fed with the carbon filament covering yarns. The wave-absorbing warp knitted fabric can be used for making electromagnetic shielding knitted garments, interior decorating materials of buildings and vehicles and other protecting textiles.
Description
Technical Field
The invention relates to the technical field of electromagnetic shielding, in particular to a wave-absorbing warp-knitted fabric with a carbon filament core-spun yarn chaining elastic structure 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 human bodies from being damaged by electromagnetic radiation or reduce the harm of the electromagnetic radiation as much as possible, people shield electromagnetic radiation sources and reduce the radiation amount on one hand, and on the other hand, effective protective materials are developed to carry out individual protection, and electromagnetic radiation protective fabrics are one of the electromagnetic radiation protective fabrics. 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: in Japanese unexamined patent publication Hei 2-133632, a durable sewing yarn is produced by wrapping carbon fibers with a thermoplastic multifilament yarn, and the following 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 CN200780014529.7 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 warp knitting of the carbon filament core-spun yarn used in the present invention, which uses 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 warp knitting machine like common yarns, the wave-absorbing knitted fabric is provided for the outer clothing, casual clothing and engineering materials for electromagnetic wave shielding and protection, and the textiles for vehicles, traffic and decoration, and the application range of the carbon filament bundle fibers is widened.
Disclosure of Invention
The invention aims to provide a high-elasticity electromagnetic shielding fabric which has wide wave-absorbing frequency, can be effectively used for individual protection and has good elastic deformation and application thereof.
In order to achieve the above object, the present invention provides a wave-absorbing warp-knitted fabric, which is characterized in that the wave-absorbing warp-knitted fabric is manufactured by a multi-bar chaining method of warp knitting processing, the multi-bar chaining method comprises mutually stringing and sleeving carbon filament core-spun yarns, other fiber yarns or a combination thereof into a plurality of rows of coils, and filling back and forth by the carbon filament core-spun yarns, the other fiber yarns or the combination thereof to form a chaining elastic structure, namely the wave-absorbing warp-knitted fabric, wherein at least one of the plurality of rows of coils and the filling in yarns is fed with the carbon filament core-spun yarns.
Preferably, the weft insertion is full-width weft insertion or partial weft insertion, and the full-width weft insertion refers to chaining weft insertion of the whole warp-knitted door; the partial weft insertion refers to weft insertion back and forth among a plurality of rows of coils.
Preferably, the plurality of rows of stitches made of the carbon filament core-spun yarn and the plurality of rows of stitches made of the other fiber yarn are arranged in a ribbon shape, and the plurality of rows of stitch ribbons made of the carbon filament core-spun yarn and the plurality of rows of stitch ribbons made of the other fiber yarn are arranged at intervals.
Preferably, the weft insertion strips of the carbon filament core-spun yarns and the weft insertion strips of the other fiber yarns are arranged at intervals.
Preferably, the number ratio of the plurality of rows of coils and the number of paths occupied by the carbon filament core-spun yarn in the weft insertion is more than or equal to 1: 10.
Preferably, the carbon filament core-spun yarn comprises a carbon filament bundle and other fibers coated outside the carbon filament bundle.
More preferably, the other fibers are natural fibers and common chemical fibers.
More preferably, the other fiber yarn has the same or similar chemical composition with other fibers coated on the outer side of the carbon filament bundle.
The invention also provides application of the wave-absorbing warp-knitted fabric in the aspects of manufacturing electromagnetic wave shielding knitted clothes, interior materials of buildings and vehicles and other protective textiles. The electromagnetic wave shielding knitted garment is particularly used for privacy protection. The other protective textiles are especially household protective textiles such as covers, sleeves, screens and the like.
Compared with the prior art, the invention has the following advantages and positive effects:
(a) the warp knitted fabric can provide broadband and can be effectively used for high-elasticity electromagnetic shielding fabrics for individual protection, and particularly can be realized by adjusting the structure of a warp knitted chain fabric within the range of 0.2-2.0 GHz;
(b) the elasticity of the transverse lines can be conveniently adjusted by the number of the coil rows which are inserted back and forth so as to adapt to wearing;
(c) because the chaining coil is of a three-dimensional bending structure and the chaining weft insertion is basically arranged in a straight state, the advantages of bending arrangement and straight arrangement are integrated, and the electromagnetic radiation resistance can be complemented;
(d) the chaining in the warp knitting is of a common structure and product processing, has mature technology and easy forming, can be conveniently processed into the wave-absorbing warp knitted fabric, can be used for electromagnetic wave shielding protective clothing needing an elastic structure, and is particularly used for private protective clothing, interior materials of buildings and vehicles, and household protective textiles such as covers, sleeves and screens.
Drawings
FIG. 1a is a schematic view of a wave-absorbing warp knitted fabric with a strip structure of carbon filament core-spun yarn looping and weft insertion (span 9 rows);
FIG. 1b is a schematic view of a wave-absorbing warp knitted fabric with a strip structure of both looping and weft insertion (7 rows of span) of a carbon filament core-spun yarn;
FIG. 1c is a schematic view of a wave-absorbing warp knitted fabric with a strip structure of both looping and weft insertion (span 4 rows) of a carbon filament core-spun yarn;
FIG. 2a is a schematic view of a wave-absorbing warp-knitted fabric with a uniformly distributed structure of all carbon filament core-spun yarns;
FIG. 2b is a schematic view of a wave-absorbing warp-knitted fabric with a uniformly distributed structure, in which the braided weft insertion is carbon filament core-spun yarns;
FIG. 2c is a schematic view of a wave-absorbing warp-knitted fabric with a uniformly distributed structure, which is knitted into a loop to form a carbon filament core-spun yarn;
FIG. 3a is a schematic view of a wave-absorbing warp-knitted fabric in which carbon filament core-spun yarns are strip-shaped, chain-formed and looped and other fiber yarns are laid in weft uniformly;
FIG. 3b is a schematic view of a wave-absorbing warp-knitted fabric in which carbon filament core-spun yarns are strip weft insertion and are uniformly distributed in a chain-knitting loop;
FIG. 3c is a schematic view of a wave-absorbing warp-knitted fabric in which carbon filament core-spun yarns are strip-shaped, chain-knitted and looped and weft insertion is uniformly distributed;
FIG. 4 is a schematic structural view of a carbon filament core spun yarn;
in the figure: a 1-carbon filament core spun yarn comprising 11-carbon filament core spun yarn loops; 12-carbon filament core-spun yarn weft insertion;
2-other fiber yarn, which includes 21-other fiber yarn loop formation; 22-other fiber yarn weft insertion;
3-carbon filaments;
4-other fibers.
Wherein DS is a synergistic wave-absorbing region which is a region with carbon filament core-spun yarn chaining coils and weft insertion;
LS is a wave absorbing zone and is an area only having carbon filament core-spun yarn coils;
CS is a linear wave absorbing area which is an area only having carbon filament core-spun yarn weft insertion;
NS is a wave-absorbing-free area and is an area where only other fiber yarns exist.
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 invention adopts a multi-bar chaining method of warp knitting processing, all carbon filament core-spun yarns, or all other fiber yarns, or both other fiber yarns and carbon filament core-spun yarns are mutually strung and sleeved into a row by using single yarns, and the wave-absorbing warp knitted fabric with a chaining elastic structure is formed by fully or partially weaving the carbon filament core-spun yarns or all other fiber yarns back and forth. The wave-absorbing warp knitted fabric is at least looped or fed with carbon filament core-spun yarns in weft insertion, and is knitted and chained to form the wave-absorbing warp knitted fabric with the carbon filament core-spun yarns in at least one of an even distribution, a strip shape or a back-and-forth inclined crossed strip shape.
The chaining and looping are three-dimensional bent periodic arrangement; the chain weft insertion is formed by connecting the formed coils in series and arranging the formed coils in a basically straightened period. Therefore, the carbon filament core-spun yarn has three-dimensional bending arrangement and basic straightening arrangement in the wave-absorbing warp-knitted fabric, so that the wave-absorbing advantages of two arrangements can be integrated.
The wave-absorbing warp knitted fabric with the carbon filament core-spun yarn chaining elastic structure comprises a full-width weft insertion chaining and a part of weft insertion chaining. The full width weft insertion refers to the chaining weft insertion of the whole warp knitting door width, and at the moment, the carbon filament core-spun yarns serving as the weft insertion are almost straight and are perpendicular to the longitudinal columns; the partial weft insertion refers to weft insertion back and forth among a plurality of rows of coils. The number of weft inserted rows determines the length and pitch of the back and forth transverse straight segments and the transverse elasticity of the warp knitted fabric.
The wave absorption of the wave absorbing warp knitted fabric refers to the absorption and shielding of electromagnetic waves, wherein: the area where the carbon filament core-spun yarn chaining coil and the weft insertion exist simultaneously is a synergistic wave absorbing area; the area where only the carbon filament core-spun yarn coil exists is a ring wave absorbing area; the area only having the carbon filament core-spun yarn weft insertion is a linear wave absorbing area; the areas where only other fiber yarns are present are non-absorbing areas.
The wave-absorbing warp-knitted fabric can be changed by adjusting one or more of the uniform distribution or interval path ratio of the carbon filament core-spun yarns in the wave-absorbing warp-knitted fabric, the number of crossing columns of the chaining weft insertion and the coil arrangement density. The spacing path ratio refers to the ratio of the number of the coil rows or the number of the weft insertion of the carbon filament core-spun yarn to the number of the coil rows or the number of the weft insertion of other fiber yarns. The coil arrangement density is the number of coils in unit length and is divided into longitudinal density and transverse density. The number of crossing rows is the number of rows of loops through which the weft insertion of the knitting chain runs.
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. And (2) warping the carbon filament core-spun yarn 1 and other fiber yarns 2 according to the process design requirement, wherein all the carbon filament core-spun yarn 1 or all the other fiber yarns 2 or the carbon filament core-spun yarn 1 and the other fiber yarns 2 are spaced according to a certain requirement, and then placing two warped warp beams on a warp knitting machine, wherein one warp knitting guide bar penetrates into a warp knitting looping guide bar, and the other warp knitting guide bar penetrates into a warp knitting weft insertion guide bar.
According to the selected uniform distribution or interval path ratio of the carbon filament core-spun yarn 1 and other fiber yarns 2, the crossing number of the chain weft insertion and the coil arrangement density, three types of electromagnetic shielding braided fabrics are prepared:
(a) the wave-absorbing warp-knitted fabric with the strip structure is knitted in a chaining way and laid in weft, and is shown in examples 1-3, and specific process parameters and results are shown in table 1;
(b) the wave-absorbing warp knitted fabric with the uniformly distributed structure is knitted in a chaining way, and the specific process parameters and results are shown in table 2 in examples 4 to 6;
(c) the wave-absorbing warp-knitted fabric with at least one of the chaining looping and weft insertion being in a strip structure is shown in examples 7-9, and specific process parameters and results are shown in Table 3.
The wave-absorbing performance of the wave-absorbing warp knitted fabric of the 9 embodiments, namely the shielding effectiveness (EMSE) of the electromagnetic wave is measured to obtain the peak value SE of the EMSEmaxFrequency f corresponding to peak valuemaxAnd a frequency band f of higher electromagnetic wave shielding effectiveness1，f2]The shape of the shielding effectiveness peak of the frequency band and the average value of the shielding effectiveness
Wherein,
in the formula f1，f2Respectively, the start frequency and the end frequency of the frequency band with higher electromagnetic wave shielding effectiveness. The results of the 5 parameters obtained are shown in tables 1, 2 and 3, respectively.
Example 1
Taking mulberry silk (filament) coated carbon filament core-spun yarn as partial chaining looping and weft insertion; cotton fiber (short fiber of mulberry silk) spun yarn is used as chain knitting loop formation and weft insertion for filling, and according to the requirements of blurring and shielding of private parts of human bodies, a wave-absorbing warp knitted fabric of chain knitting loop formation and back-and-forth inclined crossed strip carbon filament core-spun yarn is designed, as shown in figure 1 a. The spacing yarns of the chaining looping and weft insertion all adopt cotton staple yarns, the weft insertion yarns of the silk/carbon filament core-spun yarns are inclined back and forth and overlapped with the chaining loops of the carbon filament core-spun yarns at intervals to form a synergistic wave-absorbing area DS, and the band area of the carbon filament core-spun yarns weft insertion yarns inclined back and forth forms a linear wave-absorbing area CS. After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare a high-grade comfortable wave-absorbing warp-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Example 2
Taking the cotton fiber-coated carbon filament core-spun yarn as a part of chain knitting loop formation and weft insertion; the cotton yarn is used as the filled chaining loop and weft insertion, and the wave-absorbing warp knitted fabric of the chaining loop and the back-and-forth oblique crossing strip carbon filament core-spun yarn is designed according to the fuzzy and shielding requirements of private parts of human bodies, as shown in figure 1 b. The cotton yarn is adopted as the spacer yarn of the chaining looping and weft insertion, the weft insertion yarn of the cotton/carbon filament core-spun yarn is inclined back and forth and overlapped with the chaining loop of the carbon filament core-spun yarn at intervals to form a synergistic wave absorbing area DS, and the band area of the carbon filament core-spun yarn weft insertion yarn inclined back and forth forms a linear wave absorbing area CS. After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare a high-grade comfortable wave-absorbing warp-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Example 3
Taking the wool fiber coated carbon filament core-spun yarn as part of chaining, looping and weft insertion; the wool yarn is used as the filled chaining loop and weft insertion, and the wave-absorbing warp knitted fabric of the chaining loop and the back-and-forth oblique crossing strip carbon filament core-spun yarn is designed according to the fuzzy and shielding requirements of private parts of human bodies, as shown in figure 1 c. The interval yarns of the chaining looping and weft insertion adopt wool yarns, the weft insertion yarns of the wool/carbon filament core-spun yarns tilt back and forth and are overlapped with the chaining loops of the carbon filament core-spun yarns at intervals to form a synergistic wave-absorbing area DS, and a chaining looping strip area filled by the wool yarns forms a wave-absorbing-free area NS because no carbon filament core-spun yarns exist. After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare a high-grade comfortable wave-absorbing warp-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Table 1 measured values of technical parameters and electromagnetic shielding effectiveness EMSE5 parameters of wave-absorbing warp-knitted fabric with strip structure of chaining looping and weft insertion
Note: 52TIs a 52-size yarn, or a 52tex yarn.
Example 4
The Kevlar fiber-coated carbon filament core-spun yarn is taken as chaining looping and weft insertion, and the wave-absorbing warp-knitted fabric of the chaining looping and full-width weft insertion carbon filament core-spun yarn is designed according to the requirements of the human body privacy part on fuzziness and shielding, as shown in figure 2 a. And the chaining looping and the full-width weft insertion both adopt Kevlar/carbon filament core-spun yarns, and the Kevlar/carbon filament core-spun yarns are overlapped to form a synergistic wave-absorbing area DS. After the fabric is woven, the wave-absorbing warp knitted fabric with high strength and high modulus can be prepared after finishing and the like, and can be used as high strength and high modulus flame-retardant interior materials of buildings and vehicles and household protective textiles such as high strength and high modulus flame-retardant covers, sleeves, screens and the like.
Example 5
Taking the Nomex fiber-coated carbon filament core-spun yarn as a weft insertion; the Nomex yarn is used as a chaining and looping yarn, and a wave-absorbing warp knitted fabric of the chaining and looping yarn and the back-and-forth inclined crossed strip 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. The chain knitting loop is made of Nomex yarn, the weft insertion yarn of Nomex/carbon filament core-spun yarn is inclined back and forth, and a linear wave absorbing area CS is formed in the whole area. After the fabric is woven, the wave-absorbing warp knitted fabric with the flame-retardant function can be prepared after-finishing and the like, and can be used as flame-retardant interior materials of buildings and vehicles and household protective textiles such as flame-retardant covers, sleeves, screens and the like.
Example 6
Taking the ramie fiber-coated carbon filament core-spun yarn as a chaining loop; the ramie yarn is used as weft insertion, and a wave-absorbing warp-knitted fabric of the chain-knitting loop-forming and back-and-forth oblique crossing strip carbon filament core-spun yarn is designed according to the requirements of the blurring and shielding of the private part of the human body, as shown in figure 2 c. The ramie yarn is adopted to perform back and forth inclination, ramie/carbon filament core-spun yarns are adopted for chain knitting and looping, and a loop wave-absorbing area LS is formed in the whole area. After the fabric is woven, the wave-absorbing warp knitted fabric with high strength and high modulus can be prepared after finishing and the like, and can be used as interior materials of buildings and vehicles and household protective textiles such as covers, sleeves, screens and the like.
Table 2 measured values of technical parameters and electromagnetic shielding effectiveness EMSE5 parameters of wave-absorbing warp-knitted fabric with uniform structure of chaining looping and weft insertion
Note: denier D is the weight in grams that a 9000m long fiber has; the number (T: tex) is the weight in grams that a 1000m long fiber would have.
Example 7
Taking the polyester staple fiber coated carbon filament core-spun yarn as a part of chaining and looping; the polyester staple fiber yarn is used as a chain knitting loop and weft insertion filling material, and a wave-absorbing warp knitted fabric of the chain knitting loop and back-and-forth inclined crossed strip 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 3 a. The weft insertion yarns inclined back and forth are all polyester staple yarns; the chain knitting looping interval yarn adopts polyester staple fiber yarn, and a formed strip area does not have carbon filament core-spun yarn so as to form a wave-absorbing-free area NS; and forming a loop wave-absorbing region LS by using the chaining coil strip region of the polyester/carbon filament core-spun yarn. After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare a high-grade comfortable wave-absorbing warp-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Example 8
Taking the carbon filament core-spun yarn coated by the nylon filament as a chaining loop and a part of weft insertion; the wool/nylon composite yarn is used as the weft insertion for filling, and the wave-absorbing warp knitted fabric of the carbon filament covering yarn with the cross strips which are knitted into loops and inclined back and forth is designed according to the requirements of the blurring and the shielding of the private parts of the human body, as shown in figure 3 b. The weft-inserted spacing yarns adopt wool/nylon composite yarns, the weft-inserted yarns of the nylon-long/carbon-filament core-spun yarns are inclined back and forth and overlapped with the chaining coils of the nylon-long/carbon-filament core-spun yarns to form a synergistic wave-absorbing area DS; and the weft insertion adopts strip areas of the wool/nylon composite yarns to form a ring wave absorbing area LS. After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare a high-grade comfortable wave-absorbing warp-knitted fabric which can be used for human body electromagnetic wave shielding, privacy protection clothes and household protection textiles.
Example 9
Taking the carbon filament core-spun yarn coated with the polypropylene filament as a part of chaining, looping and weft insertion; the polypropylene textured yarn is used as a filled chaining loop, and according to the fuzzy and shielding requirements of private parts of a human body, a wave-absorbing warp knitted fabric of the chaining loop and the back-and-forth inclined crossed strip carbon filament core-spun yarn is designed, as shown in fig. 3 c. The spacer yarn of the chaining and looping adopts polypropylene textured yarn, the weft insertion yarn of the polypropylene long/carbon filament core-spun yarn inclines back and forth and is overlapped with the chaining loop of the carbon filament core-spun yarn to form a synergistic wave absorbing area DS, and only the weft insertion yarn strip area of the polypropylene long/carbon filament core-spun yarn which inclines back and forth forms a linear wave absorbing area CS. After the fabric is woven, the fabric can be dyed, post-finished and the like to prepare a high-grade comfortable wave-absorbing warp-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 technical parameters and electromagnetic shielding effectiveness EMSE5 parameters of the wave-absorbing warp-knitted fabric with at least one of the chaining, looping and weft insertion as a strip structure
Note: 61TIs a 61-size yarn, or a 61tex yarn, i.e., a 61tex yarn.
Claims (4)
1. The wave-absorbing warp knitted fabric is characterized by being manufactured by a multi-bar chaining method of warp knitting processing, the multi-bar chaining method comprises the steps of mutually stringing and sleeving carbon filament core-spun yarns, other fiber yarns or a combination of the carbon filament core-spun yarns and the other fiber yarns into a plurality of rows of coils, and inserting the carbon filament core-spun yarns, the other fiber yarns or the combination of the carbon filament core-spun yarns and the other fiber yarns back and forth to form a chaining elastic structure, namely the wave-absorbing warp knitted fabric, wherein at least one of the plurality of rows of coils and the inserting weft is fed with the carbon filament core-spun yarns; the full-width weft insertion refers to the chaining weft insertion of the whole warp knitting breadth; the partial weft insertion refers to weft insertion back and forth among a plurality of rows of coils; the multi-row coil strips formed by the carbon filament core-spun yarns and the multi-row coil strips formed by other fiber yarns are arranged at intervals; the weft insertion strips formed by the carbon filament core-spun yarns and the weft insertion strips formed by other fiber yarns are arranged at intervals.
2. The wave absorbing warp knit fabric of claim 1 wherein the ratio of the number of rows of loops to the number of courses of carbon filament core-spun yarn in the weft-insert yarns is greater than or equal to 1: 10.
3. the wave absorbing warp knit according to any one of claims 1 to 2 wherein the carbon filament core spun yarn comprises a bundle of carbon filaments and other fibers coated on the outside of the bundle of carbon filaments.
4. Use of the wave-absorbing warp knit according to any one of claims 1 to 3 for the manufacture of electromagnetic wave shielding knitted garments and interior materials for buildings and vehicles and other protective textiles.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4067210A (en) * | 1975-10-14 | 1978-01-10 | The United States Of America As Represented By The Secretary Of The Army | Warp knit fabric containing weft of protective yarn-covered activated-carbon yarn |
| 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 |
| 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 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58213615A (en) * | 1982-06-07 | 1983-12-12 | Toyobo Co Ltd | Knit cloth of fibrous active carbon |
| JPS6461527A (en) * | 1987-08-26 | 1989-03-08 | Toyo Boseki | Covered yarn |
| US5147714A (en) * | 1990-11-09 | 1992-09-15 | Abc Industries, Inc. | Antistatic reinforced fabric construction |
| FR2772240A1 (en) * | 1997-12-12 | 1999-06-18 | Picardie Lainiere | Knitted textile, for reinforcing clothing, contains antistatic threads and/or fibers |
| 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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2011
- 2011-09-27 CN CN201110289940.3A patent/CN102505324B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4067210A (en) * | 1975-10-14 | 1978-01-10 | The United States Of America As Represented By The Secretary Of The Army | Warp knit fabric containing weft of protective yarn-covered activated-carbon yarn |
| 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 |
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| JP昭58-213615A 1983.12.12 |
| JP昭64-61527A 1989.03.08 |
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