CN102425027B - Plated yarn and warp high-elasticity wave absorbing weft-knitted fabric of carbon filament core yarns and application thereof - Google Patents

Abstract

The invention provides a plating-wound warp-wound high-elastic wave-absorbing weft knitted fabric of carbon filament core-spun yarn and its application. The wave-absorbing weft-knitted fabric is characterized in that it contains carbon filament core-spun yarn, and the carbon filament core-spun yarn includes carbon filament bundles and other fibers wrapped outside the carbon filament bundles. The wave-absorbing weft-knitted fabric includes a weft-knitted fabric, and all or part of the knitting yarns of the weft-knitted fabric are composed of carbon filament core-spun yarns. Alternatively, the wave-absorbing weft-knitted fabric includes a weft-knitted fabric, and also includes at least one of horizontal plating and longitudinal warp wrapping, the knitting yarn of the weft-knitted fabric does not contain carbon filament core-spun yarn, and the All or part of at least one of the transverse plating and longitudinal warp wrapping is composed of carbon filament core-spun yarn. The wave-absorbing weft-knitted fabric can be used to make electromagnetic wave shielding protective clothing and other protective textiles.

Description

Plate-wound warp-wound high-elastic wave-absorbing weft knitted fabric of carbon filament core-spun yarn and its application

technical field

The invention relates to the technical field of electromagnetic shielding, in particular to a high-elastic wave-absorbing weft knitted fabric made of carbon filament core-spun yarn and its application.

Background technique

With the increasing application of electrical equipment, electromagnetic radiation has become a new kind of pollution. The human body is exposed to electromagnetic radiation for a long time, and the nervous system, cardiovascular system, endocrine system, reproductive system, etc. will be damaged to varying degrees. In order to protect the human body from or minimize the harm of electromagnetic radiation, on the one hand, people shield the source of electromagnetic radiation to reduce the amount of radiation; on the other hand, they develop effective protective materials for personal protection, and electromagnetic radiation protective fabric is one of them. At present, there are mainly two ways to develop fabrics with electromagnetic shielding function, one is to apply an electromagnetic shielding coating on the fabric, and the other is to process fibers with electromagnetic shielding function into fabrics.

Regarding the first approach, there have been many patent reports. Chinese patent CN200910054882.9 uses chemical silver plating to form a layer of silver on the surface of polyester fabric, thereby endowing the fabric with electromagnetic shielding properties. Chinese patent CN200910048743.5 utilizes the method of electroless copper plating to form a layer of copper on the surface of the polyester fabric, thereby endowing the fabric with electromagnetic shielding properties. Chinese patent CN200610119515.9 uses vacuum sputtering method to spray one or more of metal aluminum, silver, iron, nickel, chromium, gold, platinum or magnesium; or metal aluminum, silver, iron, nickel, chromium, gold One or more of the oxides of platinum, platinum or magnesium form a film on the fabric, giving the fabric an electromagnetic shielding effect. The metal coating is not resistant to washing. After repeated washing, the electromagnetic shielding effect is seriously reduced. The coated fabric feels rough, has poor air permeability, and the process is complicated. In order to achieve a better shielding effect, multiple coatings are often required. This is completely different from the way the composite yarn weaves used in the present invention.

Regarding the second approach, it is generally purely spun with metal fibers or blended with ordinary clothing fibers and then woven into fabrics. Chinese patent CN101423996A uses permalloy and clothing yarn to interweave fabric to realize electromagnetic shielding. Chinese patent CN1045428A is that the blended yarn of cotton fiber and stainless steel fiber is woven into electromagnetic shielding fabric. Chinese patent CN87103582A utilizes nickel fiber and spinnable flame-retardant fiber blended yarn to weave electromagnetic shielding fabric. The metal fiber has a large specificity, and the woven fabric is thick and rough, which is irritating to the skin. Carrying out metal plating on ordinary clothing fibers to make conductive fibers also belongs to the second method. Chinese patent CN201395671Y silver-plates chemical fiber filaments, and then interweaves with ordinary yarns to obtain high-shielding radiation-proof fabrics.

Textiles made of carbon fibers can be used as electromagnetic wave shielding materials, because the electrical properties of carbon fibers are similar to metals. The resistivity of carbon fiber is (1. 5~3. 0) ×10 ^-3 Ω cm, which is an excellent electromagnetic shielding structural material, but carbon fiber is very brittle, and single fiber breakage is easy to occur during bending. Therefore, the application of most carbon fiber composite materials is firstly preformed and then coated with resin and solidified to form a structural material of the desired shape. The current processing method mainly uses special three-dimensional weaving equipment to weave the carbon filament yarn into a three-dimensional fabric, and then coats it with resin for shaping and cooling to obtain a composite material. In the weaving process, the carbon filament yarn is easy to break and the surface is easy to be roughened to form hairiness, so it is difficult for carbon fiber to form a fabric. Some people have tried to impregnate the carbon filaments with sizing agents such as paste and oil to improve the sizing performance, but the use of sizing agents to improve the sizing performance will make the carbon filaments thick and hard. In the patent document: JP-A-2-133632, carbon fibers are wrapped with thermoplastic multifilaments to make durable sewing yarns. Carbon fiber is a covered yarn in which the core yarn is covered with ultra-high molecular weight polyethylene fiber, which retains the advantages of high strength and high modulus of carbon filament, and suppresses the generation of carbon fiber hairiness. This is how to protect the carbon fiber tow from damage.

U.S. Patent No. USP 4237108 provides a method for preparing carbon fiber fabrics. The heat-set acrylonitrile fibers are woven into cloth, then oxidized, and then carbonized to obtain carbon fiber fabrics. Chinese patent CN 200780014529.7 provides a method for weaving carbon fiber cloth by using an air-jet loom. The carbon fiber sliver with a denier of 400-6000tex is used as the warp yarn, and the auxiliary fiber whose denier is 1/5 or less of the carbon fiber sliver is used as the weft yarn to weave unidirectional Permanent carbon fiber fabric, which overcomes the problem of carbon fiber fluffing in the weaving process. However, this method can only weave carbon fiber unidirectional fabrics, and the adjustment of weaving parameters is relatively complicated, and the warp density and weft density are also limited to prevent carbon fiber fluff from affecting weaving. These are processing problems solving pure carbon fiber fabrics, which are completely different from the principle of composite yarn knitting that the present invention adopts.

The above-mentioned electromagnetic wave shielding fabrics or wave-absorbing fabrics are all woven fabrics, which shield electromagnetic waves in the form of a uniform body, which is fundamentally different from the present invention in principle, method, structure and application.

The knitted structure is that the loops are intertwined with each other. This characteristic determines that the knitted fabric is softer than the woven fabric. There are also patents in this area that use the knitting method to prepare radiation-proof fabrics. U.S. Patent USP 5968854 silver-plates nylon and other chemical fiber filaments to make conductive filament yarns, and then uses a knitting structure to weave high-conductivity radiation-proof knitted fabrics. Direct metallization of chemical fiber filaments can overcome the shortcomings of heavy metal fibers and skin irritation, and can also overcome the shortcomings of metal-coated fabrics such as rough hand feeling, poor air permeability and resistance to washing, but it also has the problem of complicated process. Chinese patent CN200910181902.9 provides a method for preparing warm and anti-radiation knitted fabrics. It is made of anti-radiation fiber yarn (mainly composed of metal blended fibers) and elastic yarn in the same way. , the inside and the front are woven and connected with connecting yarn. It is a warm, radiation-proof and elastic knitted fabric that can be piled up, and it is comfortable to wear. But this patent does not point out that according to the needs of actual radiation protection, adjust the radiation protection performance of the fabric through tissue design. This is completely different from the carbon fiber composite yarn weft knitting adopted in the present invention, which adopts different organizational structures and controls the arrangement density of the fabric.

The most similar is that Chinese patent CN200710190584.3 provides a method for preparing carbon fiber fabrics, which uses regenerated cellulose fibers or polyacrylonitrile fiber yarns to weave fence fabrics, and obtains graphite fiber yarn nets as base fabrics by heating at high temperatures. Fabrics are formed by dry jet spinning. Although the method of weaving with acrylonitrile fiber or regenerated cellulose fiber and then carbonizing to form carbon fiber fabric avoids the problem of carbon fiber fluff, the fiber will shrink through heat treatment. Deformation will affect the appearance and flatness of the fabric, and high temperature treatment will inevitably consume a lot of energy, which is not energy-saving enough. However, this method also uses a woven structure. First, regenerated cellulose fibers or polyacrylonitrile fibers are used to make grid-like fabrics, and then carbonized to obtain open grid-like pure carbon fiber fabrics. The purpose is to avoid spinning and weaving. To the damage of carbon fiber, and can not be used as clothing fabric, this is all different from the principle of the present invention, shaping mode and fabric form.

The invention uses the carbon filament core-spun yarn, so that the carbon filament yarn can well overcome the weakness that burrs are easily formed during the weaving process. It enables carbon filament yarns to be woven on ordinary weft knitting machines like ordinary yarns, provides wave-absorbing knitted fabrics for electromagnetic wave shielding and protection underwear and other textiles, and broadens the scope of use of carbon filament bundle fibers.

Contents of the invention

The object of the present invention is to provide a highly elastic striped wave-absorbing weft-knitted fabric and its application after adding rigid fibers due to electromagnetic shielding requirements, so as to solve the current problem of lack of electromagnetic wave shielding fabrics that can be effectively used for personal protection.

In order to achieve the above object, the present invention provides a wave-absorbing weft-knitted fabric, which is characterized in that it contains carbon filament core-spun yarn, and the carbon filament core-spun yarn includes carbon filament bundles and carbon long filament bundles Other fibers outside the tow.

As a preferred solution, the wave-absorbing weft-knitted fabric includes a weft-knitted fabric, and all or part of the knitting yarns of the weft-knitted fabric are composed of carbon filament core-spun yarns.

Preferably, the wave-absorbing weft-knitted fabric further includes at least one of transverse plating and longitudinal warp wrapping, and at least one of the transverse plating and longitudinal warp wrapping is wholly or partially made of carbon filament core-spun yarn constitute.

More preferably, the knitting yarn adopts the loop knitting form, the horizontal plating adopts at least one of loop plating and half-circle plating, and the longitudinal warp winding adopts two kinds of warp wrapping and return oblique lines form.

More preferably, the knitting yarns of the weft-knitted fabric composed of carbon filament core-spun yarns are arranged in strips.

More preferably, the transverse plating composed of carbon filament core-spun yarns is arranged in strips.

More preferably, the longitudinal warps made of carbon filament core-spun yarns are arranged in strips.

More preferably, the horizontal plating made of carbon filament core-spun yarn and the longitudinal warp made of carbon filament core-spun yarn are arranged in a grid shape.

As a preferred solution, the wave-absorbing weft-knitted fabric includes a weft-knitted fabric, and also includes at least one of horizontal plating and longitudinal warp wrapping, and the knitting yarn of the weft-knitted fabric does not contain carbon filament core-spun yarns, All or part of at least one of the horizontal plating and the longitudinal warping is composed of carbon filament core-spun yarn.

Preferably, the knitting yarn adopts the loop knitting form, the horizontal plating adopts at least one of loop plating and half-circle plating, and the longitudinal warp wrapping adopts two forms of warp wrapping and return oblique lines .

More preferably, the transverse plating composed of carbon filament core-spun yarns is arranged in strips.

More preferably, the longitudinal warps made of carbon filament core-spun yarns are arranged in strips.

More preferably, the horizontal plating made of carbon filament core-spun yarn and the longitudinal warp made of carbon filament core-spun yarn are arranged in a grid shape.

As a preferred solution, the other fibers are natural fibers or chemical synthetic fibers.

The other parts of the knitting yarn of the weft-knitted fabric and the horizontal plating and the longitudinal winding are made of other fiber yarns. same or similar material.

The present invention also provides the use of the above-mentioned wave-absorbing weft-knitted fabric in making electromagnetic wave shielding protective clothing and other protective textiles. The electromagnetic wave shielding protective clothing especially refers to protective underwear for human privacy and safety, and the other protective textiles especially refer to household and protective textiles such as covers, covers, covers, and screens.

Compared with the prior art, the present invention has the following advantages and positive effects:

(a) Since general weft-knitted fabrics can only provide uniform or horizontal strip electromagnetic shielding effects, the introduction of warp wrapping in the present invention can provide vertical strip electromagnetic shielding effects, and can be combined with horizontal strips to form grid-like and multiple Electromagnetic shielding effect;

(b) Since the transverse extensibility of general weft-knitted fabrics is several times greater than that of the longitudinal direction, the plating of the present invention, especially the plating without loops, can adjust its transverse elasticity;

(c) Since the plating and warp winding are coil structures, even if rigid fiber yarns such as carbon filament core-spun yarns are introduced, weft-knitted fabrics with the same elasticity as flexible fiber yarns can be achieved, because knitted fabrics are Coil deformation is dominant, and the deformation of rigid fiber yarn is more elastic;

(d) Since plating and warp wrapping are commonly used methods in weft knitting, it is possible to easily adjust the spacing ratio of carbon filament core-spun yarn, the number of plating and paths or the number of warps and windings, and the arrangement density of coils. Adjust and change the wave-absorbing properties of knitted fabrics to achieve the effect of anti-electromagnetic radiation in broadband;

(e) Since the wave-absorbing weft-knitted fabric of the present invention has high elasticity, it can be used for electromagnetic wave shielding and protective clothing requiring high elasticity, especially for protective underwear for human privacy and safety, as well as high-end comfortable household and Protective textiles.

Description of drawings

Figure 1a is a schematic diagram of a superimposed grid-shaped wave-absorbing weft braided fabric with all the carbon filament core-spun yarn ground tissue and added yarn around the warp;

Fig. 1b is a schematic diagram of a superimposed grid-like wave-absorbing weft knitted fabric with half-circle plating and warp wrapping of all other fiber yarns;

Figure 1c is a schematic diagram of a superimposed grid-shaped wave-absorbing weft knitted fabric with a part of the carbon filament core-spun yarn ground structure and additional yarn winding around the warp

(full-circle plating on other fibers, half-circle plating on carbon filament core-spun yarn);

Figure 1d is a schematic diagram of a superimposed grid-shaped wave-absorbing weft braided fabric with carbon filament core-spun yarn and other fiber yarns alternated (1′1, that is, one road is separated by one road) and then added yarns around the warp.

Fig. 2a is a schematic diagram of strip-shaped wave-absorbing weft braided fabric with all carbon filament core-spun yarns ground tissue and half-circle plating;

Figure 2b is the rhombus-shaped strip-shaped suction of all other fiber yarns (3 rows of full-circle plating and 3 rows of half-circle plating; each row is misplaced with a left-slanted column and each row is misplaced with a right-slanted column). Schematic diagram of wave weft woven fabric;

Figure 2c is a schematic diagram of a strip-shaped wave-absorbing weft braided fabric with partial carbon filament core-spun yarn plating (full-circle plating on other fibers, half-circle plating on carbon filament core-spun yarn) ;

Figure 2d is a schematic diagram of a strip-shaped wave-absorbing weft knitted fabric with carbon filament core-spun yarns alternated with other fiber yarns (1′2, that is, one line separated by two lines) and then plated (5 rows and a half of full circle plating) Circle Plating 4 columns).

Fig. 3a is a schematic diagram of a strip-shaped wave-absorbing weft braided fabric with all the carbon filament core-spun yarn ground tissue rewinding;

Fig. 3b is a schematic diagram of a vertical wave-absorbing weft knitted fabric in which all other fiber yarns are grounded and warp-wound;

Fig. 3c is a schematic diagram of a striped wave-absorbing weft braided fabric in which part of the carbon filament core-spun yarn is wound around the warp;

Fig. 4 is a schematic diagram of the structure of carbon filament core-spun yarn;

In the picture:

1—carbon filament core-spun yarn, which includes 11—carbon filament core-spun yarn ring knitting; 12—carbon filament core-spun yarn ring plating; 13—carbon filament core-spun yarn half-circle plating; 14— Carbon filament core-spun yarn warp loop; 15 – Carbon filament core-spun yarn warp return slash;

2 – other fiber yarns;

3 – carbon filament bundle;

4 – Other fibers.

in,

The TS area is a triple electromagnetic wave shielding function area (TS: Triple Shielding): TS-CCC is a three-dimensional curved arrangement area of coils (C represents a coil); TS-CLC is a three-dimensional bending and a straight line arrangement area of two coils (L represents a straight line); TS–CLSc is a three-dimensional bending of a coil, a straight line and a half-circle arrangement area (Sc represents a half-circle);

The DS area is a double electromagnetic wave shielding function area (DS: Double Shielding); DS-CC is a three-dimensional curved arrangement area of coils (C represents a coil); DS-CL is a three-dimensional bending and a straight line arrangement area of a coil ( L means a straight line); DS-CSc is a three-dimensional bending of a coil and an arrangement area of half a circle;

S area is the area with electromagnetic wave shielding function (S: Shielding); S–C is the three-dimensional curved arrangement area of coils (C means coil); S–L is the straight line arrangement area (L means straight line); S–Sc is half circle The near linear arrangement area (Sc means half circle);

The NS area is a functional area without electromagnetic wave shielding (NS: Non-Shielding).

Detailed ways

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

The wave-absorbing weft-knitted fabric of the present invention is a high-elastic wave-absorbing weft-knitted fabric formed by weft-knitting carbon filament core-spun yarn or other fiber yarns. It is composed of all or at least one interval of carbon filament core-spun yarn, or all other yarns of other fibers, and the carbon filament package fed in a strip-shaped horizontal plating, or longitudinal warp, or both at the same time. Weft knitting of core yarn, which is a highly elastic wave-absorbing weft knitted fabric in the shape of strips, which is sequentially stacked into loops or half-loop plating. The strips refer to strips, strips, and superimposed grids. The collective name of the state.

The knitting yarn in the wave-absorbing weft knitted fabric is in the form of loop knitting yarn; the plating of the carbon filament core-spun yarn has two forms: loop plating and half-circle plating; the carbon filament core-spun yarn There are two forms of warp winding and return slash. Wherein the circle is a three-dimensional curved coil; the return oblique line is a straight line; the half circle is a combination of a straight line and a curved line, and the straight line segment is more than the curved line segment. Therefore, the wave-absorbing weft knitted fabric has the characteristics of a combination of curved arrangement and straight arrangement, wherein the curved arrangement is the main body.

The wave-absorbing weft-knitted fabric refers to the weft-knitted fabric of all carbon filament core-spun yarns or all other fiber yarns, or at least carbon filament core-spun yarns that are spaced along the way. Plating of the core yarn to enhance the strip-shaped wave-absorbing performance; or filling or superimposing the warp feeding of the carbon filament core-spun yarn to form a grid-shaped wave-absorbing performance; or the above-mentioned plating and warp-winding at the same time It is superimposed and fed in a strip shape to form a superimposed grid shape and has both multiple absorbing properties.

The wave-absorbing properties of the wave-absorbing weft knitted fabric are regional, and on the weft-knitted fabric with the carbon filament core-spun yarn, there is no plating or warp wrapping of the carbon filament core-spun yarn, or Or the grid areas superimposed by the two are single, double, or triple electromagnetic shielding effective areas; The grid area where the warp or the two are superimposed is a single or double electromagnetic shielding effective area respectively; while the bar area where only other fiber yarns are weft-knitted is a non-electromagnetic shielding effective area.

The wave absorption refers to the absorption and shielding of electromagnetic waves, which can be achieved by adjusting the ratio of the number of intervals of the carbon filament core-spun yarn in the weft knitted fabric, the number of plating and the number of routes or the number of warps and the number of routes, and the arrangement density of the coils. Or the adjustment of the above items to change, the said spacing ratio refers to the ratio of the number of coils of the carbon filament core-spun yarn to the number of coils of other fiber yarns; The number of lines can be divided into horizontal density and vertical density; the number of plating and the number of courses mentioned above refer to whether the plating is or not and the number of courses of the plating; Number of loops for weft knitting.

As shown in FIG. 4 , it 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 wrapped outside the carbon filament bundle 3 . Take a number of tubes of carbon filament core-spun yarn 1, place them on the creel of a common circular weft machine, use special knitting needles and special sinkers, and use a special yarn guide, so that the circular weft machine can weave plating organization and winding organization. The arrangement density of yarn, the form and the size of grid block, and knitting yarn and plating, warp-wound organization are combined, carry out weft knitting, obtain three kinds of electromagnetic shielding weft-knitted fabrics of the present invention:

(a) Wave-absorbing weft knitted fabrics with both plating and warp winding: Example 1-Example 4, the specific process parameters are shown in Table 1;

(b) only plated wave-absorbing weft knitted fabric: embodiment 5 ~ embodiment 8, the specific process parameters are shown in Table 2;

(c) Wave-absorbing weft knitted fabrics with warp only: Example 9~Example 11, see Table 3 for specific process parameters.

有影响，其中，

，式中f ₁，f ₂分别为较高电磁波屏蔽效能频率段的起始频率和终止频率。所以，对这三类电磁屏蔽添纱绕经纬编织物，11个实施例试样作电磁屏蔽效能EMSE的测量和计算。所得5个参数结果值分列于对应的表1、表2和表3中。 Due to the spacing ratio of carbon filament core-spun yarn 1 and other fiber yarns 2; loop length and fabric structure; form and size of bars; and carbon filament core-spun yarn 1 plating or winding or a combination of the two , the peak value of the electromagnetic wave shielding effectiveness (EMSE:electromagnetic shielding efficiency) curve SE _max and the frequency f _max corresponding to the peak value, and the frequency band [ f ₁ , f ₂ ] with higher electromagnetic wave shielding effectiveness, the shielding effectiveness of this frequency band Peak morphology and shielding effectiveness average

have an impact, among which,

, where f ₁ and f ₂ are the start frequency and stop frequency of the frequency band with higher electromagnetic wave shielding effectiveness, respectively. Therefore, for these three types of electromagnetic shielding plaited warp and weft knitted fabrics, the electromagnetic shielding effectiveness EMSE was measured and calculated for the 11 embodiment samples. The resulting values of the five parameters are listed in the corresponding Table 1, Table 2 and Table 3.

Example 1

The ramie fiber-coated carbon filament core-spun yarn is used as the weft stitch ground weaving yarn, loop plating, half-circle plating and warp wrapping yarn, and the carbon filament core-spun yarn is designed according to the blurring and occlusion requirements of the private parts of the human body. The grid electromagnetic shielding weft knitted fabric is shown in Fig. 1a. The plaiting and warp yarns of ramie/carbon filament core-spun yarn are overlapped on the weft plain stitch of ramie/carbon filament core-spun yarn, and the overlapping grid area of the three forms a triple electromagnetic wave shielding functional area (TS area); only the plaited or warp-wrapped and ground-weave overlapping grid area forms a double electromagnetic wave shielding functional area (DS area); while the grid area without warp winding and plating forms an electromagnetic wave shielding functional area (S area) . After the fabric is woven, it can be dyed and finished to make a high-grade and comfortable electromagnetic shielding weft knitted fabric, which can be used for human electromagnetic wave shielding and privacy protection clothing and household protective textiles.

Example 2

The Nomex yarn is used as the knitting yarn to weave the weft flat stitch, and the Nomex fiber-coated carbon filament core-spun yarn is used as the half-circle plating and warp yarn. The grid electromagnetically shields the weft-woven fabric, as shown in Figure 1b. Plating and warp wrapping yarns using Nomex/carbon filament corespun yarns are overlapped on the weft plain stitch using Nomex yarns, and the overlapping grid area forms a double electromagnetic wave shielding functional area (DS area); only plating or wrapping The grid area of warp yarn and ground weave forms an electromagnetic wave shielding functional area (S area); while the grid area without warp winding and plating forms a non-electromagnetic wave shielding functional area (NS area). After the fabric is woven, it can be dyed and finished to make a high-grade and comfortable electromagnetic shielding weft knitted fabric, which can be used for human electromagnetic wave shielding and privacy protection clothing and household protective textiles.

Example 3

The polypropylene filament-coated carbon filament core-spun yarn is used as the weft and flat stitch to weave part of the loop knitting yarn, loop plating, half-circle plating and warp wrapping yarn. According to the blurring and occlusion requirements of the private parts of the human body, the carbon filament wrapping is designed. The grid of core yarns electromagnetically shields the weft-knitted fabric, as shown in Figure 1c. Full-circle plating is applied to the weave of polypropylene filament yarn, and half-circle plating is applied to the weave of polypropylene long/carbon filament core-spun yarn. The plaiting and warp yarns using acrylic/carbon filament core-spun yarn are overlapped on the weft stitch ground weave that also uses acrylic long/carbon filament core-spun yarn, and the overlapping grid area of the three forms a triple electromagnetic wave shielding functional area (TS area); only the plated yarn or the warp yarn is overlapped on the weft plain stitch that also uses the acrylic long/carbon filament core-spun yarn, and the overlapping grid area of the two forms a double electromagnetic wave shielding functional area (DS area) , the strip area obtained by overlapping the ground structure with polypropylene filament yarn is the area with electromagnetic shielding function (S area). After the fabric is woven, it can be dyed and finished to make a high-grade and comfortable electromagnetic shielding weft knitted fabric, which can be used for human electromagnetic wave shielding and privacy protection clothing and household protective textiles.

Example 4

Taking Kevlar fiber-coated carbon filament core-spun yarn as the weft flat stitch to weave part of the loop knitting yarn, loop plating and warp wrapping yarn, according to the fuzzy and shielding requirements of the private parts of the human body, the grid electromagnetic of the carbon filament core-spun yarn is designed. Shield the weft-knit fabric, as shown in Figure 1d. The ground structure adopts the form of Kevlar/carbon filament core-spun yarn and Kevlar yarn at a ratio of 1:1, that is, one road is separated by one road. Plating and wrapping yarns using Kevlar/carbon filament core-spun yarns are overlapped on the plain weave, and the overlapping grid area of the three forms a triple electromagnetic wave shielding functional area (TS area); only the plating or wrapping yarns overlap to In the weft and plain stitch, the overlapping grid area forms a double electromagnetic wave shielding functional area (DS area), while the grid area without warp winding and plating forms an electromagnetic wave shielding functional area (S area). After the fabric is woven, it can be dyed and finished to make a high-grade and comfortable electromagnetic shielding weft knitted fabric, which can be used for human electromagnetic wave shielding and privacy protection clothing and household protective textiles.

Table 1 Process parameters and electromagnetic shielding effectiveness EMSE5 parameter measured value of embodiment 1～embodiment 4

Parameter Example Example 1 Example 2 Example 3 Example 4 Carbon Filament Corespun 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 Yarn number of other fibers (tex) Ramie yarn: 52 ^T Nomex yarn: 70 ^T Polypropylene filament yarn: 500D Kevlar filament: 650D Interval ratio of knitting (root:root) all - 6:3 1:1 Number of plating intervals (root+empty root) (4+4)+(3+3) 6+6 (3+0)+(6+0) 4+5 The number of intervals between warp yarns (root + empty 5+3 5+3 5+3 5+3 Arrangement density of yarn (root/5cm) horizontal density and vertical density) 45 45 45 45 yarn structure Weft needle Weft stitch Weft stitch Weft needle grid block format Circle Plating Orthogonal Grid + Half Circle Plating Orthogonal Grid Orthogonal grid for half circle plating Circle Plating Orthogonal Grid + Half Circle Plating Orthogonal Grid Loop Plating Orthogonal Grid Grid bar size (horizontal column' vertical row)) 4'5 6'5 3′5+6′5 4'5 Peak SE _max (dB) 30.22 15.53 26.82 24.79 Peak frequency f _max (GHz) 1.2 1.2 1.2 1.2 Frequency band f ₁ ~ f ₂ (GHz) 0.2~1.6 0.2~1.6 0.2~1.6 0.2~1.6 EMSE peak morphology three peaks three peaks three peaks three peaks

(dB)EMSE mean

(dB) 16.73 11.39 22.70 21.87 Basic use Hemp style comfort, wear and home protection Enhanced Flame Retardancy and Household Protection Polypropylene style comfort, wear and home protection Enhanced Flame Retardancy and Household Protection

Note: Denier D is the weight in grams of a 9000m long fiber; the number is the weight in grams of a 1000m long fiber.

Example 5

Cotton fiber-coated carbon filament core-spun yarn is used as weft flat stitch ground weave circle yarn and half-circle plating. According to the fuzzy and shielding requirements of the private parts of the human body, the strip electromagnetic shielding weft weaving of carbon filament core-spun yarn is designed. objects, as shown in Figure 2a. The plated yarn using cotton/carbon filament core-spun yarn is overlapped on the weft plain stitch that also uses cotton/carbon filament core-spun yarn, and the horizontal strip area where the two overlap forms a double electromagnetic wave shielding function area (DS area) ; And there is no electromagnetic wave shielding functional area (S area) in the bar area without plating. After the fabric is woven, it can be dyed and finished to make a high-grade and comfortable electromagnetic shielding weft knitted fabric, which can be used for human electromagnetic wave shielding and privacy protection clothing and household protective textiles.

Example 6

Wool yarn is used as weft flat stitch ground weaving yarn, wool fiber coated carbon filament core-spun yarn is used as loop plating and half-circle plating, and carbon filament core-spun yarn is designed according to the blurring and occlusion requirements of the private parts of the human body The strip electromagnetic shielding weft knitted fabric, as shown in Figure 2b. The ring plating and half ring plating of wool/carbon filament core-spun yarn are plated at intervals of 3 columns, and each row is misplaced by a column of left oblique % and each row is dislocated by a column of right oblique &, forming a diamond-shaped strip-shaped wave absorption weft knitted fabric. The entire plated area forms an electromagnetic wave shielding functional area (S area). After the fabric is woven, it can be dyed and finished to make a high-grade and comfortable electromagnetic shielding weft knitted fabric, which can be used for human electromagnetic wave shielding and privacy protection clothing and household protective textiles.

Example 7

Take polyester filament coated carbon filament core-spun yarn as the weft flat stitch to weave part of the circle knitting yarn, circle plating and half circle plating, and design the carbon filament core-spun yarn according to the blurring and shielding requirements of the private parts of the human body. Strip electromagnetic shielding weft-knitted fabric, as shown in Figure 2c. Full-circle plating on other fibers, half-circle plating on polyester/carbon filament core-spun yarn. The full-circle plating area forms an electromagnetic wave shielding functional area (S area); the half-circle plating overlaps with the polyester long/carbon filament core-spun yarn to form a double electromagnetic wave shielding functional area (DS area). After the fabric is woven, it can be dyed and finished to make a high-grade and comfortable electromagnetic shielding weft knitted fabric, which can be used for human electromagnetic wave shielding and privacy protection clothing and household protective textiles.

Example 8

The carbon filament core-spun yarn covered with silk fiber is used as the weft flat stitch to weave circle yarn, circle plating and semi-circle plating. According to the blurring and occlusion requirements of the private parts of the human body, the strips of the carbon filament core-spun yarn are designed Electromagnetic shielding weft knitted fabric, as shown in Figure 2d. Silk/carbon filament yarn and spun yarn are woven in the form of 1:2, that is, one road is separated by two roads. Full circle plating and half circle plating are plated in the form of 5:4. The weft flat stitch strip area using silk/carbon filament core-spun yarn forms a double electromagnetic wave shielding functional area (DS area); the weft flat stitch strip area using silk yarn forms an electromagnetic wave shielding functional area (S district). After the fabric is woven, it can be dyed and finished to make a high-grade and comfortable electromagnetic shielding weft knitted fabric, which can be used for human electromagnetic wave shielding and privacy protection clothing and household protective textiles.

Process parameters and electromagnetic shielding effectiveness EMSE5 parameter measured value of table 2 embodiment 5～8

`` parameter Example Example 5 Example 6 Example 7 Example 8 Carbon Filament Corespun Yarn Number (tex) 80 80 80 80 Composite ratio of carbon filament core-spun yarn Carbon filament tow 75/cotton 25 Carbon filament bundle 75/hair 25 Carbon filament bundle 75/polyester length 25 Carbon filament 75/silk 25 Yarn number of other fibers (tex) Cotton yarn: 52 ^T Wool yarn: 48 ^T Polyester textured yarn: 48 ^T Silk (silk) yarn: 60 ^T Interval ratio of knitting (root:root) all - 5:3 1:2 Number of plating intervals (root+empty root) 4+3 All, full circle plating 3 rows' half circle plating 3 rows (4+0) +(5+0) +(3+0) All, full circle plating 5 rows' half circle plating 4 rows Yarn arrangement density (root/5cm) horizontal density and vertical density 40 40 40 40 yarn structure 1+1 rib Weft stitch Weft stitch Weft stitch grid block format half circle plating bar Plating Diamond Plating stripes Plating stripes Grid bar size (horizontal column' vertical row) 4'0 5'3 4′0+5′0+3′0 1′0+2′0 Peak SE _max (dB) 23.34 17.84 20.89 23.84 Frequency corresponding to the peak value f _max (GHz) 1.2 1.2 1.2 1.2 Frequency band f ₁ ~ f ₂ (GHz) 0.2~1.6 0.2~1.6 0.2~1.6 0.2~1.6 EMSE peak morphology three peaks three peaks three peaks three peaks

(dB)EMSE mean

(dB) 20.23 14.07 16.37 20.37 Basic use Cotton style comfort, wear and home protection Wool style comfort, wear and home protection Polyester style comfort, wear and home protection Silk style comfort, wear and home protection

Note: 52 ^T is No. 52 yarn, or 52 tex yarn is 52tex yarn.

Example 9

Take polyester staple fiber coated carbon filament core-spun yarn as the weft flat stitch ground weave loop knitting yarn and warp wrapping yarn, and design the strip electromagnetic shielding weft knitted fabric of carbon filament core-spun yarn according to the fuzzy and shielding requirements of the private parts of the human body , as shown in Figure 3a. The warp-wrapping yarns of polyester staple/carbon filament core-spun yarns are overlapped on the weft-plain stitches, and the overlapping vertical strips form a double electromagnetic wave shielding functional area (DS area); while the vertical strips without warp-wrapping yarns form There is an electromagnetic wave shielding functional area (S area). After the fabric is woven, it can be dyed and finished to make a high-grade and comfortable electromagnetic shielding weft knitted fabric, which can be used for human electromagnetic wave shielding and privacy protection clothing and household protective textiles.

Example 10

The polyester filament yarn is used as the weft and flat stitch weaving yarn, and the polyester filament-coated carbon filament core-spun yarn is used as the warp yarn. According to the blurring and occlusion requirements of the private parts of the human body, the strips of the carbon filament core-spun yarn are designed Electromagnetic shielding weft knitted fabric, as shown in Figure 3b. The vertical strip area of the warp-wound yarn using polyester long/carbon filament core-spun yarn forms an electromagnetic wave shielding functional area (S area); while the vertical strip area without warp wrapping forms a non-electromagnetic wave shielding functional area (NS area). After the fabric is woven, it can be dyed and finished to make a high-grade and comfortable electromagnetic shielding weft knitted fabric, which can be used for human electromagnetic wave shielding and privacy protection clothing and household protective textiles.

Example 11

Nylon filament-coated carbon filament core-spun yarn is used as the weft flat stitch to weave part of the loop yarn and warp-wrapped yarn, and according to the fuzzy and shielding requirements of the private parts of the human body, the strip electromagnetic shielding weft weaving of carbon filament core-spun yarn is designed objects, as shown in Figure 3c. The plated yarn using brocade long/carbon filament core-spun yarn is overlapped on the weft stitch ground weave that also uses brocade long/carbon filament core-spun yarn, and the overlapping grid area of the two forms a double electromagnetic wave shielding functional area (DS Area), while the grid area overlapping with the ground structure of the wool/nylon composite yarn forms an electromagnetic wave shielding functional area (S area); the area of the structure area of the nylon long/carbon filament core-spun yarn without warp yarns forms an electromagnetic wave In the shielding functional area (S area), there is no electromagnetic wave shielding functional area (NS area) formed by the wool/nylon composite yarn without warp yarns. After the fabric is woven, it can be dyed and finished to make a high-grade and comfortable electromagnetic shielding weft knitted fabric, which can be used for human electromagnetic wave shielding and privacy protection clothing and household protective textiles.

Table 3 Process parameters and electromagnetic shielding effectiveness EMSE5 parameter measured values of embodiment 9~embodiment 11

Parameter Example Example 9 Example 10 Example 11 Carbon Filament Corespun Yarn Number (tex) 100 100 100 Composite ratio of carbon filament core-spun yarn Carbon filament 70/ polyester short 30 Carbon filament 65/ polyester length 35 Carbon filament 65/ brocade length 35 Yarn number of other fibers (tex) Polyester yarn: 61 ^T Polyester filament: 600D Wool/nylon composite yarn: 50 ^T Interval ratio of knitting (root:root) all - 6:3 The number of warp intervals (root + empty root) 5+3 5+3 5+3 Yarn arrangement density (root/5cm) horizontal density and vertical density) 45 45 45 yarn structure 1.62 1.64 1.64 grid block format warp vertical bar warp vertical bar knitting warp yarn grid Grid bar size (horizontal column' vertical row) 0'5 (0′5 6'5 Peak SE _max (dB) 20.98 10.90 18.99 Peak frequency f _max (GHz) 1.2 1.2 1.2 Frequency band f ₁ ~ f ₂ (GHz) 0.2~1.6 0.2~1.6 0.2~1.6 EMSE peak morphology three peaks three peaks three peaks EMSE mean (dB) 18.23 8.98 15.98 Basic use Polyester style comfort, wear and home protection Polyester style comfort, wear and home protection Wool style comfort, wear and home protection

Note: Denier D is the weight in grams of a 9000m long fiber; the number is the weight in grams of a 1000m long fiber.

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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