JP4307466B2 - Composite yarn containing metal-plated yarn and warp knitted fabric - Google Patents

Description

  The present invention provides a composite yarn combined with a dyeable yarn so that the metal-plated yarn having antibacterial properties and electromagnetic wave shielding properties is not visually exposed, a fabric or a weft knitted product containing the composite yarn, and a metal-plated yarn The present invention relates to a warp knitted fabric that is disposed so as not to expose a metal-plated yarn while being used alone as a part of a warp knitted fabric.

  As the quality of life in recent times is required, a more comfortable living environment is required. Especially in countries with high temperature and high humidity like Japan, various bacteria are easy to propagate, which impedes healthy living and suffers from bad odors. Therefore, it is widely performed to treat underwear and the like with an antibacterial agent.

  On the other hand, along with the development of electronic technology, various electronic devices such as TVs, word processors and personal computers that constantly leak electromagnetic waves have spread to the workplace and home, and as a result, obstacles to the body of electromagnetic waves have become a problem.

  Three types of antibacterial agents are roughly used. The first is metal or metal-containing inorganic particles, the second is various organic compounds, and the third is animal polymer compounds such as chitin and chitosan, respectively. It is used depending on the application and inclusion in the fiber itself.

  However, the antibacterial properties vary depending on the use conditions and washing conditions of the target textile products, and further antibacterial agents having a sufficient effect on all textile products have not been found when sanitary safety is added. An antibacterial agent that is particularly excellent in durability and can be used in a wide range of applications has not been found.

  On the other hand, as a countermeasure against electromagnetic interference, it is basically preferable to shield the electronic device itself so as not to leak electromagnetic waves. However, it is impossible to effectively shield all types of electronic equipment. Therefore, it has been practiced to wear clothes having electromagnetic shielding properties on the user side of electronic devices. For example, garments made from fabrics having a coating layer containing metal powder are used for this purpose. A garment made of a fabric having a coating layer is heavy and it is practically difficult to give various colors desired for garments.

  Considering durable antibacterial properties and electromagnetic shielding properties, metal-containing fibers are excellent. However, in metal-containing fibers obtained by kneading metal particles into a thermoplastic resin and melt spinning, the metal particles are buried in the fibers, so that sufficient antibacterial properties cannot be exhibited. In addition, the metal content as a yarn that can withstand high-speed melt spinning is at most about 0.5%, and this amount of metal cannot exhibit antibacterial and electromagnetic shielding properties. However, 100% metal yarns having antibacterial and electromagnetic shielding properties such as silver and copper, that is, wires themselves cannot be used as fabric yarns from the viewpoint of yarn flexibility.

  Therefore, if a yarn having a metal layer such as silver or copper on the surface, that is, a metal-plated yarn is obtained, it is effective as an antibacterial yarn or an electromagnetic shielding yarn. As the seed yarn, silver-plated polyamide yarn (trade name, X-Static) is commercially available from Sauquoit, USA. The antibacterial and electromagnetic shielding properties of this yarn are extremely excellent. However, when this yarn itself is used alone or as a twisted yarn with another synthetic fiber yarn, another problem arises.

  That is, it is an essential condition for textile products, especially clothing products, to be dyed in a desired color. However, the surface of the X-Static (registered trademark) yarn has a silver color and cannot be dyed like conventional natural fibers or synthetic fiber yarns. In addition, when it is twisted with other synthetic fiber yarns, only mottled dyeing can be performed. In addition, when the metal comes out on the surface, the metal wears during use, which hinders long-term maintenance of antibacterial and electromagnetic shielding properties. Dyeing problems also occur when X-Static (registered trademark) yarns are mixed with woven or knitted fabrics in the usual manner.

  An object of the present invention is to provide a yarn capable of desired dyeing while exhibiting the excellent antibacterial property and electromagnetic wave shielding property of a metal-plated yarn by using a composite yarn having a special structure, and using this composite yarn Providing a fabric and further containing the metal plating thread itself, so that the metal plating thread is not visually exposed to the surface, and the desired antibacterial property or electromagnetic wave shielding property is relatively inexpensive and stably maintained. Another object of the present invention is to provide a fabric that can be dyed to a desired color.

  The object of the present invention consists of a wedge knitting yarn knitted using a dyeable yarn and an insertion yarn inserted as a core yarn in the wedge knitting yarn, the insertion yarn including at least one metal-plated yarn. This is achieved by a composite yarn characterized in that it consists of:

  By using the composite yarn of the present invention as a part of its constituent yarn, the fabric or weft knitted product of the present invention can be obtained.

  When a warp knitted fabric is obtained using the metal-plated yarn itself, the metal-plated yarn may be inserted into the warp knitted fabric as an insertion thread so that it cannot be visually discriminated from the surface of the warp knitted fabric. At that time, if two or more types of metal plating yarns supplied by different types of braids are used, and the two or more types of metal plating yarns are arranged so as to cross in the warp knitted fabric, the conductivity of the metal plating yarns is improved. The electromagnetic shielding properties of the obtained warp knitted fabric can be improved.

  Among metals, silver has the most antibacterial properties. Therefore, it is more preferable that the metal plating yarn in the composite yarn of the present invention is a silver plating yarn.

  The yarn type of the metal yarn to be metal-plated may be appropriately selected according to the use of the fiber product in which the composite yarn of the present invention is used.

  The type of raw yarn may be a spun yarn made of monofilament, multifilament or short fiber. In any case, it is preferable that 20% to 40% of metal is plated with respect to the fiber weight in weight ratio.

  By producing a fabric such as a woven fabric, a circular knitted fabric, a warp knitted fabric or a weft knitted product such as a sock, a stocking, and a seta using the composite yarn of the present invention, a fabric or product having high antibacterial or electromagnetic shielding properties is provided. Can do. At that time, the composite yarn or the fabric of the present invention may be partially used depending on the use of the fabric, the product made from the fabric, or the weft knitted product.

  The composite yarn of the present invention was filed by the same applicant as the present application as Japanese Patent Application No. 7-271200 on October 19, 1995, and published on Japanese Patent Application Laid-Open No. 9-111624 on April 28, 1997. The name of the invention “composite yarn having elasticity and gloss” and Japanese Patent Application No. 7-271194 filed on Oct. 19, 1995, and Japanese Patent Application Laid-Open No. 9-111623 on Apr. 28, 1997. It has the same structure as the composite yarn used in the published title “Composite thread for embroidery lace”. The former is intended to provide a yarn having stretchability and gloss by knitting a wedge knitting yarn with a non-stretchable long fiber yarn and using a stretchable yarn as an insertion yarn. Knitted with a non-stretchable yarn that can be dissolved or decomposed by a solvent containing water or heat, and by using a stretchable yarn as an insertion yarn, there are no operational defects such as yarn breakage and It is intended to give stretchability corresponding to the lace fabric to the pattern portion of the embroidery lace by subsequent processing, and the effect of the yarn is different from that of the present invention. The composite yarn does not have antibacterial and electromagnetic shielding properties, and does not provide a means for improving the dyeability of the composite yarn produced by using a metal-plated yarn.

  The composite yarn of the present invention supplies a dyeable yarn and an insertion yarn containing at least one metal-plated yarn to the needles of the warp knitting machine through different yarn guides, and the yarn for the dyeable yarn A knit yarn is knitted by reciprocating the guide in the cut yarn forming mode, and at the same time, the yarn guide for the insertion yarn is reciprocated in the insert yarn forming mode to A composite yarn in which at least one metal-plated yarn is inserted is obtained.

  In this case, the knitting yarn may be knitted using two or more dyeable yarns, or one or more other types of fiber yarns may be used in combination with the metal-plated yarn as the insertion yarn. The selection may be arbitrarily determined according to the intended use of the composite yarn.

  In the composite yarn of the present invention, since the insertion yarn including the metal plating yarn is entangled with the loop of the comb knitting yarn made of dyeable yarn, the metal plating yarn does not substantially protrude from the surface of the composite yarn. In addition, by appropriately selecting the thickness of the metal-plated yarn, the thickness of the dyeable yarn and the number of stitches per unit length of the comb knitting yarn according to the thickness of the composite yarn determined according to the intended use It is possible to prevent the metal-plated yarn from being exposed to the surface of the composite yarn. As a result, it is possible to prevent the metal-plated yarn from being damaged by friction and to uniformly dye the composite yarn.

  However, the metal plating yarn itself is an expensive yarn, and if a composite yarn is made using this metal plating yarn, the yarn becomes more expensive. Therefore, if a metal-plated thread itself is appropriately disposed in a part of the fabric with a special structure, antibacterial or electromagnetic shielding properties can be exhibited as well as using a composite thread, and a metal-plated thread can be used. The inventor of the present application intensively studied based on the idea that the surface of the fabric should not be visually exposed, and as a result, the durability of the metal-plated yarn and the uniform dyeing of the fabric should be possible. As a result, it has been found that a fabric having such requirements can be achieved by the following warp knitted fabric.

  The warp knitted fabric according to the present invention is a warp knitted fabric using two or more types of yarns. At least one type of metal braided yarn is used as the yarn, and the metal braided yarn is visually from the surface of the warp knitted fabric. It is inserted so that it cannot be identified. When the metal-plated yarn is arranged as an insertion yarn, the insertion yarn is not entangled with other constituent yarns of the warp knitted fabric, so it is arranged to extend substantially linearly in the warp or weft direction of the warp knitted fabric. Therefore, the antibacterial effect or electromagnetic wave shielding property by the metal-plated yarn can be made uniform in a predetermined area of the warp knitted fabric. In addition, since the insertion yarn can be arranged inside the warp knitted fabric, it helps to improve the above-mentioned color unevenness and antibacterial durability. It should be noted that when used in a field requiring electromagnetic shielding properties, it is preferable to dispose the metal-plated yarns so as to cross each other.

  If the warp knitted fabric is a net warp knitted fabric used as a ground organization such as a power net, an embroidery lace is made on the net warp knitted fabric with embroidery thread, and a bra is formed using the embroidery lace. It is good to make underwear for women such as. By doing so, underwear having excellent antibacterial properties and electromagnetic wave shielding properties can be obtained.

  The metal-plated yarn used in the present invention has excellent performance in terms of antistatic properties. Therefore, the composite yarn of the present invention, the fabric made using the composite yarn, and the warp knitted fabric including the metal-plated yarn exhibit excellent effects in antistatic properties as well as antibacterial properties and electromagnetic wave shielding properties. It will be.

  The configuration of the composite yarn of the present invention will be described based on the accompanying drawings showing an example of the composite yarn of the present invention. FIG. 1 (A) shows a composite yarn 1 in which an insertion yarn 2 is inserted into an open-cut wedge yarn 3 by hooking, and FIG. 2 (A) shows a wedge yarn 3 similar to FIG. 1 (A). A composite yarn 1a which is an open stitch and has an insertion yarn 2a inserted in a reverse manner is shown in FIG. 3A. FIG. 11 is shown. FIG. 1 (A), FIG. 2 (A) and FIG. 3 (A) are all yarns showing how an insertion yarn including a metal plating yarn is knitted on a comb knitting yarn made of a dyeable yarn. FIG. 2 is a structural diagram, and in an actual composite yarn after knitting, the insertion yarn is linear, and accordingly, the shape of the loop of the comb knitting yarn is different from the shape shown in the drawing.

  Whether the knitting yarn is knitted with open or closed stitches, and whether the insertion yarn is inserted with the front or back is arbitrary depending on the application of the composite yarn, the type of yarn used, or the knitting conditions It only has to be selected.

  In any of the composite yarns shown in FIGS. 1 (A), 2 (A) and 3 (A), the comb knitting yarns 3, 13 are yarns extending in the axial direction of the composite yarns 1, 1a, 11 indicated by 3a, 13a. And the yarns that are entangled with the curved adjacent loops indicated by 3b and 13b, while the insertion yarns 2, 2a and 12 pass through the loops of the knitting yarns 3 and 13, and the axes of the composite yarns 1 and 11 As a result, the insertion yarns 2, 2a, 12 are encased in the knitting yarns 3, 13 and entangled like a core yarn. For this purpose, the loop of the weft knitting yarns 3, 13 tightens the insertion yarns 2, 2a, 12. The strength and interval of the tightening and the elongation of the obtained composite yarns 1, 1a, 11 are adjusted by adjusting the amount of dyeable yarns sent for the wedge knitting yarns 3, 13 at the time of manufacture. It can change freely according to the use of 1a and 11.

  1 (B), 2 (B) and 3 (B) are knitting structure diagrams of corresponding composite yarns.

  As the dyeable yarn, spun yarn, multifilament, and monofilament can be used.

  As the spun yarn, a natural fiber such as cotton, wool or hemp, a short fiber of various artificial fibers such as viscose yarn, and a short fiber of various synthetic fibers can be used alone or in combination.

  As the multifilament, viscose rayon yarn, cupola ammonium rayon yarn, acetate rayon yarn or various synthetic fiber multifilament yarns can be used.

  The yarn type and thickness of these dyeable yarns may be selected according to the intended use.

  Silver, copper, zinc, lead, tin, aluminum, iron, etc. can be used as the metal seed of the metal plating thread. Although expensive, gold may be used depending on the application. The metal plating may be performed by vacuum plating or vapor phase plating corresponding to the metal to be used. At that time, for example, various synthetic fibers such as polyamide fiber and polyester fiber, and inorganic fibers such as glass fiber may be used as the raw material for metal plating.

The thickness of the metal-plated yarn is determined according to the use of the composite yarn of the present invention. In the case of silver-plated yarn, a monofilament or multifilament of about 10 ^{d to} 110 ^d is used, and the silver content in the case of this seed yarn The rate is 20% to 40% in terms of weight.

  A metal-plated yarn may be used in combination with another dyeable yarn as the insertion yarn. In this case, the dyeable yarn may be the same type as the dyeable yarn used for the comb knitting yarn.

  The ratio of the metal-plated yarn in the composite yarn is primarily based on the antibacterial or electromagnetic shielding properties required for the product in which the composite yarn is used. Should be selected in consideration of

  As a general tendency, the antibacterial properties of metal-plated yarns are extremely high as shown in the examples described later, so the weight of metal-plated yarns required for products that require antibacterial properties is relatively small. That's okay. Therefore, the usage form of the composite yarn of the present invention in the product can be selected with a margin, for example, every few.

  Next, preferred fabrics and weft knitted products using the antibacterial composite yarn of the present invention will be described in detail below.

  As described above, the composite yarn of the present invention has excellent antibacterial properties and can substantially eliminate a color difference from other portions when dyed. Therefore, various types of fabrics such as woven fabrics, warp knitted fabrics, weft knitted fabrics and weft knitted products made of socks, stockings, setters, etc. can be freely selected to provide antibacterial fabrics using composite yarns. can do.

  FIG. 4 shows an organization chart of a 6-course net warp knitted fabric as an example of a fabric using the composite yarn of the present invention.

  FIG. 5 shows an organization chart of an example of a warp knitted fabric of the present invention using a metal-plated yarn as a direct insertion yarn. In the warp knitted fabric shown in FIG. 5, the dyeable yarns 41, 42, 43, 44, 45 are knitted with the illustrated structure. Metal braided yarns 51, 52, 53, 54 are simply swung from side to side and inserted into the knitted fabric while extending in the longitudinal direction of the warp knitted fabric.

  As can be seen by comparing the structure chart of FIG. 5 with the composite yarn diagrams shown in FIGS. 1 to 3, the warp knitted fabric of FIG. It can be said that it is a net warp knitted fabric connected with yarn.

  Since the metal plating yarn is inserted in such a structure, the metal plating yarn is not visually exposed on the surface of the warp knitted fabric. In particular, the metal-plated yarn can be made less noticeable when the dyeable yarn is dyed with a cationic dye.

  FIG. 6 shows a structure diagram of another example of the warp knitted fabric of the present invention in which a metal-plated yarn that is preferably used when electromagnetic shielding properties are required is used as a direct insertion yarn.

  In the figure, the yarns indicated by thin solid lines 61, 63, and 65 are dyeable yarns supplied with the same cocoon, and the yarns indicated by thin solid lines 62, 64, and 66 are dyeable that are supplied with the other cocoon. The dyeable yarns 61, 63, and 65 are knitted mirror-symmetrically with the dyeable yarns 62, 64, and 66 to form a net warp knitted fabric. In the figure, the yarns indicated by thick solid lines 71, 73, and 75 are metal plating yarns supplied by the same kite, and the yarns indicated by thick broken lines 72, 74, and 76 are metal plating yarns supplied by other same kites. The metal plating threads 71, 73, and 75 are inserted together with the metal plating threads 72, 74, and 76 into a net warp knitted fabric knitted with a dyeable yarn as shown in the drawing.

  Among the warp knitted fabrics of the present invention, the characteristics of the warp knitted fabric shown by way of example in FIG. 6 are that metal braiding yarns of groups 71, 73, 75 shown in FIG. It is in the point where it crosses in the braided yarn and the warp knitted fabric. As described above, since the metal plating yarn has a metal plating on the surface, by arranging the adjacent metal plating yarns to cross each other, substantially all the metal plating yarns in the warp knitted fabric are electrically connected. As a result, the electromagnetic wave shielding property is further improved.

  Further, as is apparent from FIG. 6, since the metal plating yarn is inserted so as to overlap all the stitches of the net warp knitted fabric knitted with dyeable yarn, the metal plating yarn is inserted into the warp knitting fabric of FIG. There is no visual exposure, and the metal-plated yarn is arranged to the maximum with respect to a predetermined net warp knitted fabric, so that the electromagnetic wave shielding property can be improved. Since the metal-plated yarn has antibacterial properties, the warp knitted fabric shown in FIG. 6 can also be used for applications that require antibacterial properties.

  FIG. 7 shows an organization chart of an example of a warp knitted fabric of the present invention using the composite yarn of the present invention as an insertion yarn.

  In the figure, yarns 81 to 86 indicated by thin solid lines are dyeable yarns supplied in the same kite, and are knitted into a chain knitting with each wale. Yarns 91 and 96 indicated by thin broken lines are other elastic yarns supplied in the same heel, and are inserted into the chain stitch of the dyeable yarn while being swung from side to side by each wale. In the figure, the yarns A1 to A3 indicated by thick broken lines and the yarns B1 to B3 indicated by thick solid lines are composite yarns of the present invention inserted as shown in the figure by different ridges. In this warp knitted fabric, elastic yarns 91 to 96 are used, so that it has elasticity in the wale direction. Also, composite yarns are used to connect the chain-dyed dyeable yarns extending in the respective wale directions, and in this way a large number of composite yarns having metal-plated yarns as core yarns are arranged. A good electromagnetic shielding property can be exhibited in a state where the plating thread is not visually exposed.

  In order to achieve an ideally high electromagnetic wave shielding property, it is preferable to surround the electromagnetic wave generation source with a metal plate or a metal foil. However, in a field of application that is physically flexible and requires breathability or moisture absorption, such as clothing, a plate-like or foil-like one cannot be used. Therefore, in the case of clothing, although the size of the hole is large or small, there are holes that penetrate through the top and bottom of the cloth surface in some form. Regarding the electromagnetic wave shielding property, the presence of this hole causes the electromagnetic wave shielding property to deteriorate. In other words, it is required to satisfy the physical properties required for clothing as well as the appearance while retaining the holes with a size sufficient to satisfy the electromagnetic shielding required for the application. According to the knowledge of the inventor of the present invention regarding the warp knitted fabric, the size of the fabric hole relating to electromagnetic wave shielding from this viewpoint is preferably about 3 mm or less and preferably about 2 mm or less.

The present invention is described in detail below based on examples.
Example 1
In Example 1, antibacterial properties and antistatic properties were examined for warp knitted fabrics knitted using the composite yarn of the present invention.
Asahi Kasei Acrylic Multifilament, Pyuron (trade name), with a silver thread (X-Static trademark) type 30XS10 (material polyamide multifilament 30 ^d / 10f, denier 40 ^d after plating) manufactured by Sauquoit, USA The composite yarn of the present invention was obtained as a knitting yarn. A net warp knitted fabric (12 courses—complete structure) shown in FIG. 4 was knitted using the composite yarns as yarns 31, 33 and polyamide filaments as the yarns 11, 12, 13 and yarns 21, 22, 23. The weight ratio of silver-plated gold yarn in the warp knitted fabric was 2%.
The obtained net warp knitted fabric was dyed under the following conditions.
The polyamide multifilament was dyed with acid dye for 2 hours, and Pyuron was dyed with canon dye for 2 hours with 2 bath dyeings using Wins, and then washed and dried.
When the dyed cloth was observed, the silver-plated gold thread was uniformly dyed without being exposed.

The following antibacterial test was performed on the obtained dyed fabric.
・ Samples were collected from the resulting dyed cloth. ・ Measurement method of antibacterial effect: Shake flask method compliant ・ Klebsiella pneumoniae
·Test results
Sterilization rate (%)
Blank test 4.9
Unprocessed fabric (nylon standard white cloth) 10.8
Net warp knitted fabric of the present invention 99.8-99.9
In the antibacterial test, the value effective for antibacterial is when the difference between the value of the test piece and the unprocessed fabric as seen in the sterilization rate is 26% or more. The warp knitted fabric example of the present invention is very good against this standard, which proves that the composite yarn made of the metal-plated yarn of the present invention has an excellent effect on antibacterial properties. In addition, the net warp knitted fabric can be further reduced in the use ratio of the composite yarn (as a result, the warp knitted fabric can be made effective at a lower price).

The antistatic property was evaluated on the dyed fabric of the example.
Three samples were collected from the dyed fabric of the example, and as a comparative example, a nylon lace not containing silver-plated yarn was used to measure the half-life of static electricity and the triboelectric charge amount. The results obtained are shown below.
Sample 1 Sample 2 Sample 3 Nylon
Race half-life (seconds) 1.0 1.0 1.0 17.4
Frictional charge 0.05 0.05 0.13 0.09 3.20
As can be seen from the above results, the antistatic property of the warp knitted fabric using the composite yarn of the present invention is remarkably superior to that of the comparative example.
In addition, there is a theory that products with good antistatic properties, especially metal-plated thread, cause rash when directly touching the skin, and there is a theory that burns will occur when exposed to infrared rays etc. because it generates electricity. However, in the product of the present invention (a warp knitted fabric including a composite yarn and a metal-plated yarn), the metal-plated yarn does not directly touch the skin, so there is almost no risk of causing the above-mentioned injury.
Example 2
In Example 2, the electromagnetic shielding properties of the warp knitted fabric of the present invention using a metal-plated yarn as a direct insertion yarn were examined.
That using a warp knitting machine of 28G a warp knitted fabric shown in FIG. 6, using a polyamide multifilament 40 ^d / 10f as dyeable yarns 61-66, as metal-plated yarn U.S. Sauquoit Co. silver plated yarns (X- The fabric was knitted using a Static 30) type 30XS10 (material polyamide multifilament 30 ^d / 10f, denier 40 ^d after plating). The basis weight of the obtained warp knitted fabric is about 60 g / m ² , and the weight of the metal-plated yarn in the warp knitted fabric is about 20%, that is, 12 g / m ² . Was about 3 mm.

  The electromagnetic shielding properties of the obtained warp knitted fabric were measured with respect to 1-1000 MHz based on the electromagnetic shielding effect measurement method by the KEC method. A warp knitted fabric of a sample is placed between a transmitter and a receiver placed at a distance of 10 mm in a test chamber of 20 ° C. and 40% RH, and incident energy is irradiated onto the warp knitted fabric from above the warp knitted fabric. The electromagnetic shielding effect was measured below the warp knitted fabric.

The obtained results are shown in Table 1 below.
Table 1
Frequency (MHZ) 100 200 300 500 700 1000
Electric field shielding effect (dB) 22.5 22.7 23.1 24.5 26.0 25.5
Electric field shielding ratio (%) 92.5 92.7 93.0 94.0 95.0 94.7
Magnetic field shielding effect (dB) 3.6 7.0 9.1 11.6 12.8 12.5
Magnetic field shielding ratio (%) 33.9 55.3 64.9 73.7 77.1 76.3
The electric field shielding effect in Table 1 is shown in a graph in FIG.
As apparent from Table 1 and FIG. 8, in the warp knitted fabric of the present invention in which the adjacent metal plating yarns shown in FIG. 6 are arranged so as to cross each other, the electric field shielding effect is almost in the range of 1 to 1000 MHz. It is kept constant. This seems to be based on the fact that adjacent metal plating threads are arranged in a crossing manner.
Example 3
In Example 3, the electromagnetic shielding properties of a knitted fabric in which a knitted yarn was woven into a net warp knitted fabric using the composite yarn of the present invention as an insertion yarn were examined.
That the warp knitted fabric shown in FIG 7, using a 20G warp knitting machine, using a polyamide multifilament 30 ^d / 10f as dyeable yarns 81-86, the core yarn of polyurethane yarn 140 ^d as the elastic yarn 91-96 A covering yarn wound with polyamide multifilament 50 ^d / f is used as a chain knitting yarn composed of polyamid multifilament 70 ^d / 24 f as composite yarns A1 to A3 and B1 to B3. yarns (X-Static trademark) type 30XS10 obtained using the yarns obtained by inserting (material polyamide multifilament 30 ^d / 10f, denier 40d after plating). The basis weight of the obtained warp knitted fabric is 210 g / m ² , the weight of the metal-plated yarn in the warp knitted fabric is about 12%, that is, 25 g / m ² , and the maximum hole size in the warp fabric is about 2 mm. Met.
The obtained warp knitted fabric was subjected to embroidery at 85 g per m ² using embroidery yarns consisting of 140 ^d / 3 polyamide multifilaments. The electromagnetic shielding properties by the KEC method were measured on the warp knitted fabric after this embroidering in the same manner as in Example 2.

The obtained results are shown in Table 2 below.
Table 2
Frequency (MHZ) 100 200 300 500 700 1000
Electric field shielding effect (dB) 40.7 33.8 26.3 17.2 11.2 4.2
Electric field shielding ratio (%) 99.1 98.0 95.2 86.2 72.5 38.3
Magnetic field shielding effect (dB) 2.3 4.1 4.9 5.4 5.4 11.5
Magnetic shielding ratio (%) 23.3 37.6 43.1 46.3 46.3 73.4
The electric field shielding effect in Table 2 is shown as a graph in FIG.
As apparent from Table 2 and FIG. 9, in the warp knitted fabric using the composite yarn of the present invention shown in FIG. 7, the power shielding effect decreases at a frequency higher than 200 MHz. It is understood that this occurs because the metal plating yarns are separated from each other by chain stitch yarns made of dyeable yarns so that they cannot be contacted with each other, so that the metal plating yarns of the warp knitted fabric are not electrically connected to each other. However, the electromagnetic wave shielding property is high at a frequency of 100 MHz or less as compared with Example 2, the amount of metal-plated yarn in the warp knitted fabric is about 25 g / m ² , which is about twice that of Example 1, and It is understood that this is due to the small size of the holes.

  Since the composite yarn of the present invention and the fabric and weft knitted product using the composite yarn contain metal-plated yarn, they exhibit excellent antibacterial effect and electromagnetic wave shielding property, and the yarn surface is made of a dyeable yarn. Since it is composed of knitting yarn, it can exhibit the same color as ordinary dyeable yarn. Further, the warp knitted fabric according to the present invention is inserted so that the metal-plated yarn is covered in the warp knitted fabric, so that the surface of the warp knitted fabric can be made the same level as a normal dyeable yarn knitted fabric and The composite yarn can be arranged almost uniformly in the knitted fabric, and as a result, a product that is relatively inexpensive and excellent in antibacterial and electromagnetic shielding properties can be produced. These products of the present invention also have antistatic properties.

FIG. 1A is a diagram showing an example of a composite yarn of the present invention, FIG. 1A is a diagram showing the structure of the yarn, and FIG. 1B is a knitting structure diagram. FIG. 2A is a diagram showing another example of the composite yarn of the present invention, FIG. 2A is a diagram showing the structure of the yarn, and FIG. 2B is a knitting structure diagram. FIG. 3A is a diagram showing still another example of the composite yarn of the present invention, FIG. 3A is a diagram showing the structure of the yarn, and FIG. 3B is a knitting structure diagram. It is an organization chart of a net warp knitted fabric showing an example of a warp knitted fabric using the composite yarn of the present invention. It is a structure | tissue chart which shows an example of the warp knitted fabric of this invention which used the metal plating thread | yarn as direct insertion thread | yarn. It is a structure | tissue chart which shows another example of the warp knitted fabric of this invention aiming at the improvement of electromagnetic wave shielding property, using a metal plating thread | yarn as a direct insertion thread | yarn. It is an organization chart showing an example of the warp knitted fabric of the present invention aiming at improvement of electromagnetic wave shielding properties using the composite yarn of the present invention as an insertion yarn. It is a graph which shows the electromagnetic wave shielding property of the warp knitted fabric by which the metal plating thread | yarn of this invention is arrange | positioned as a direct insertion thread | yarn. It is a graph which shows the electromagnetic wave shielding property of the warp knitted fabric containing the composite yarn of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1a, 11 Composite yarn 2,2a, 12 Insertion yarn which comprises metal-plating yarn 3,13 Weft knitting yarn which consists of dyeable yarn 11,12,13 Yarn 21,22 supplied from the same guide bar , 23 Yarns supplied from other identical guide bars 31, 33 Composite yarns 41, 42, 43, 44 of the present invention Dyeable yarns 51, 52, 53, 54 Metal-plated yarns 61, 63, 65 Supplied dyeable yarn 62, 64, 66 Other dyeable yarn supplied in the same kite 71, 73, 75 Metal braided yarn supplied in the same kite 72, 74, 76 Supplied in the other same kite Metal thread 81-86 Dyeable thread supplied in the same thread 91-96 Elastic thread A1-A3 Composite thread B1-B3 Composite thread

Claims (5)

In warp knitted fabrics using two or more types of yarn,
Of the two or more types of yarns, the first metal plating yarn and the second metal plating yarn are each used as at least one type of yarn, and these metal plating yarns are visually observed from the surface of the warp knitted fabric. Inserted so that it cannot be identified automatically,
The first metal-plated yarn is swung from side to side in a continuous course between adjacent wales of the warp knitted fabric, and the second metal in the continuous course between the adjacent wales. The plating thread is swung from side to side in the opposite direction to the first metal plating thread, so that the first metal plating thread and the second metal plating thread are between the adjacent wales and the continuous A warp knitted fabric characterized by crossing over the course to be performed .   The warp knitted fabric according to claim 1, wherein the other of the two or more types of yarn is dyed with a cationic dye.   The warp knitted fabric according to claim 1 or 2, wherein the metal plated yarn is inserted so as to overlap all the stitches of the warp knitted fabric.   The warp knitted fabric according to any one of claims 1 to 3, wherein at least one of the two or more types of yarn is an elastic yarn. The warp knitted fabric according to claim 1, wherein the first metal plating yarn and the second metal plating yarn are knitted mirror-symmetrically with each other.

Images