Metallised material ''nanotex''
FIELD: textile industry, paper industry.
SUBSTANCE: invention relates to the technology of metallised material production for shielding from electromagnetic radiation in a broad range. Metallised material ''Nanotex'' is made of synthetic monofilament thread with diameter of 30-50 micron, and a number of threads is 30-160 threads per cm and surface density is 10-50 g/m2. Material has orifices between beam threads and shoots, size of which ranges within 1d-9d, where d is thread's diameter. Metal pads with predetermined surface resistance can be distributed over the material by weave or woven methods. The invention ensures production of the material with stable performances having high shielding capacity from different types of radiation including high-frequency radiation ranged from 300 to 16000 MHz.
EFFECT: production of the material with stable performance having high shielding capacity from different types of radiation.
3 cl, 2 dwg, 1 tbl, 5 ex
Metallized material "Nanotex" refers to the textile industry and can be used for shielding from electromagnetic radiation in a wide range.
Almost shielding fabric can be used for the manufacture of:
local shielding chambers (rooms, offices, objects);
- protective clothing;
- lung covers and capes for equipment and appliances;
- protective device for preventing information leaks from the premises, military installations, etc.;
- decorative items.
Currently, when equipped with shielded rooms for certification of radio equipment for domestic and industrial use, conducting radio engineering measurements for compliance with the standards and requirements of the electromagnetic compatibility and biological protection of personnel against radiation microwave sources necessary materials, able to function effectively in a wide wavelength range.
Known fabric for the top of the heat-shielding and heat-reflecting costume for employees of the fire service in the oil and gas industry, subject to the production of the effects of extreme factors, such as fire, intense radiation, etc. the Fabric is on the front side of the continuous metallic coating auth. St. No. 2104347).
However, this fabric does not provide protection from electromagnetic radiation. In addition, the metallized coating due to the rigidity during operation cracks, the result is peeling (ed. St. No. 2104347, D3D 15/12) and falling.
Known fabric for special service made on the basis of a simple weave of forming a conductive grid with square cells conductive core and weft threads, respectively alternating with synthetic background the main background thread and weft threads, which is a yarn containing cotton fibers, with the location of the flooring at the front side of the fabric, and the weft ceilings on the wrong side, with the conductive strands to form a conductive grid and are located with a spacing in the range of 0.5×0.5 mm to 2×2 mm, and the ratio of conductive and background threads is range (25-50: 75-50) wt.% (U.S. Pat. Russia №2110628, 10.05.98. Bulletin no.13).
This fabric has good barrier properties and good appearance. However, this fabric does not provide protection in the range of electromagnetic waves 40-60 dB, due to the inclusion of the conductive yarn has a high enough surface density and cannot be used when the weight of the material is determined is shining for its functionality.
The closest analogue is the material for protection from exposure to radiation, which represents the non-metallic base, including fabric coated with an electrically conductive coating, which consists of layers, and the first from the base layer is made in the form of a composition consisting of a non-metallic electrically conductive compounds and metals, and the remaining layers are made of electrically conductive non-metallic compounds and/or metals. The coating is carried out by galvanic method. This material with a thickness of from 2-15 microns provides the weakening of the magnetic fields in the frequency range from 50 Hz to 30 MHz.
However, this material is not very effective for protection from exposure to high frequency radiation from 300-16000 MHz.
In addition, the laminate is not possible with sufficient accuracy to control its conductivity and other properties, as well as to obtain a material with a given conductivity, which is of great importance for future applications. The disadvantage is the increased stiffness of the material.
The metallization process is sequential, from electrolyte solutions containing aggressive and toxic materials requiring disposal.
Technical result achieved in the proposed textile material, is what obespechenie high shielding against electric, electromagnetic, magnetic fields, infrared radiation indicators along with stable performance through the creation of a certain material structure that allows you to apply thin layers of nanosized metal particles having a high bonding strength with the substrate.
This technical result is achieved due to the fact that the material for metallization is made of synthetic monofilament yarns with a diameter of 30-50 μm with a density of threads 30-160 nits/cm, the surface density of 10-50 g/m2with openings between the warp and weft threads, the size of which ranges from 1d-9d, where d is the diameter of the thread.
After running out to obtain conductivity material "Nanotex" exposed metallization.
Metallization material "Nanotex" by means of a magnetron sputtering of the metal in vacuum from the front, back or both sides.
The method of magnetron sputtering allows to obtain nantoka films of various metals given thickness and a given surface resistance with a high level of adhesion to the substrate.
Graphical representation of the dependencies of conductivity and surface resistance from the time of deposition of metal on the material "Nanotex" shown in figure 1 and 2.
Uniform surface structure of the fabric or t is of ecotage "Nanotex", having holes with a stable size, provides even for very thin coatings of metal of high conductivity at each point of the material and good shielding properties in a wide wavelength range, the weight of the coated material is only 10-50 g/m2.
The invention is illustrated by the following examples.
Material "Nanotex from polyamide monofilament yarns with a diameter of 30 μm, a density of filaments 30 nits/cm, the distance between the threads 9d and with a surface density of 10 g/m2, metallizer way magnetron sputtering stainless steel on the front side of the material at a constant current time spraying was 80 sec, the deposition rate of 240 A/ min, the thickness of the metal film of 0.5 μm.
Material "Nanotex from polyester monofilament yarns with a diameter of 40 μm, a density of filaments 100 nits/cm, the distance between the threads 1,5d and weighing 40 g/m2metallizer aluminum as in example 1 on both sides.
Material "Nanotex from polyamide monofilament threads with a diameter of 50 μm, the density of the filaments 160 nits/cm, the distance between the threads 1d and weighing 50 g/m2metallizer copper as in example 1, with the reverse side.
The knitted fabric "Nanotex from polyester monofilament yarn diameter is trom 40 μm, the thread 100 nits/cm, the distance between the threads 5d and weighing 40 g/m2metallizer stainless steel as in example 1.
Example 5 (analog).
Fabric base consistently treated first in ammoniacal solution of salts (sulphide of silver, tin, chromium, graphite and bismuth) in the ratio of 70:30 to full wet, and then, sequentially, in water, in a solution of sodium sulfide in water, in tartrato the bismuth salt solution and again water. The second metal layer is applied by electroplating from an electrolyte containing Nickel sulfate 200 g/l, cobalt chloride 40 g/l boric acid 30 g/l saccharin 0.5 g/l at a temperature of 40°and a current density of 1 A/DM2thickness of 3 μm. The third layer is also applied by electroplating from a solution of copper sulfide. The thickness of copper layer of 1 μm. The total coating thickness is 4 μm.
These tables show that the proposed structure of the material "Nanotex provides a shielding cloth having the best performance characteristics, including higher wear resistance, minimum surface density, less rigidity while maintaining shielding properties in a wide range of radiation.
|Number example||Surface area is the ability to metallization, g/m2||The surface density after metallization, g/m2||Radiophysical characteristics of tissues in the microwave range 10-16 GHz||Hardness, points||Abrasion, cycles|
|The reflection coefficient, dB|
|Example 5 (analog)||55||79||63||23||7600|
The changing characteristics of the claimed material "Nanotex" in a big way is not possible to form it on the loom. Scaling down results in unstable, legkodelimae structure of the material and, consequently, to the loss conductive and shielding properties.
The resulting material is different:
- high shielding characteristics from exposure to radiation of the microwave range;
- vozmozhnostuvelichivat a given conductivity and surface electrical resistance;
- high electrical conductivity, allowing the use of the material to solve the problems of static electricity;
- flexible, lightweight, drape, breathability is necessary properties for use in various protective structures, curtains, overalls;
good sewing properties, the ability soldering and gluing.
1. Material on a fabric basis of synthetic monofilament yarns with a diameter of 30-50 μm with a density of threads 30-160 nits/cm and weighing 10-50 g/m2and with openings between the warp and weft threads, the size of which is within 9d-1d, where d is the diameter of the strands that are electrically conductive metallic coating, in the form of a thin layer of nanoparticles of metal caused by the method of magnetron sputtering in vacuum.
2. The material according to claim 1, characterized in that it contains a metallic surface with front, back or both sides with a given surface resistance.
3. The material according to claim 1, wherein the fabric base is made weaving or knitting method.
FIELD: textile industry, paper industry.
SUBSTANCE: invention relates to textile industry. Soft armor is produced by means of the main weaves and their derivatives with the ratio of fiber set of the warp and weft at most 2.0 with connectivity coefficient at least 5.0 and yield at minimum 290 g/m2. Reinforced beam and filling threads are used, they have aramid filament or fiber glass filament with titer of at least 6.3 tex as a core, and secondary spun aramid fiber with titer of beam and filling threads of at least 50 tex. is used as a cover.
EFFECT: production of fiber for special protective clothes and fabrics for protection from ballistic impact, fire, thermal exposure, napalm.
3 cl, 4 dwg, 1 tbl, 6 ex
FIELD: textile industry.
SUBSTANCE: invention provides fireproofing textile for use when sewing special technical clothing for workers of Emergency Control Ministry, Ministry of defense, and other force structures in order to protect workers working at enterprises including high-temperature objects, elevated heat emission, molten metal scrap containing objects, hot shops, and the like. Fireproofing textile contains staple yarn within warp and weft, said staple yarn incorporating aromatic terpolymer-based staple filaments mixed with natural and artificial fibers. Fabric is manufactured using derived, combined, and composed weaves. As natural fibers, cotton, linen, and woolen fibers are used and, as artificial, fireproofing viscose fibers.
EFFECT: improved performance characteristics of fabric, expanded assortment possibilities and resource of raw materials.
6 cl, 6 dwg, 1 tbl, 6 ex
FIELD: production of fabrics which generate heat by means of power source and may be used for manufacture of clothing, seats, quilts, etc.
SUBSTANCE: thermal fabric comprises non-conductive thread, heating thread with positive temperature coefficient, and two current-conductive terminals. Heating thread comprises core, enclosure made from matrix including embedded current-conductive particles, and isolating sheath.
EFFECT: provision for creating fabric free of wires and possessing the function of self-regulating heating.
29 cl, 5 dwg
FIELD: textile industry.
SUBSTANCE: invention relates to manufacture of fire-protection fabrics with heat-protection properties destined for militaries, firemen, foundry workers, welders, metallurgists, and so on. Fabric contains, in warp and weft, staple yarn including staple fibers based on triple aromatic copolyamide or mixture of triple aromatic copolyamide based fibers with natural fibers, or mixture of triple aromatic copolyamide based fibers with artificial fibers, or mixture of triple aromatic copolyamide based fibers with synthetic fibers, wherein triple aromatic copolyamide is expressed by following general formula: [-NH-R1-NHCO-R2-CO-]n[-NH-R3-NHCO-R2-CO]m[-NH-R2-NHCO-R2-CO]p, where n=0.05-0.4, m=0.6-0.95, p=0.05-0.4; R1-3 denote bivalent aromatic radicals in p-position, of which R1 is heterocyclic radical of formula , R2 p-phenylene, and R3 radical of formula . More specifically, natural fibers utilized are cotton, flaxen , and wool fibers; synthetic fibers are polyester(ether) and polyacrylonitrile fibers; and artificial fibers are fire-resistant viscose fibers.
EFFECT: increased resource of raw materials and assortment possibilities, and improved working characteristics of fabric.
FIELD: textile industry, in particular, providing textile surface with at least one side having increased degree of visual contrast.
SUBSTANCE: textile surface is produced on the basis of threads or filaments of at least three types, namely, extinguishing threads or filaments, thermally stable threads or filaments and threads or filaments with increased degree of visual contrast.
EFFECT: enhanced protection from elevated temperatures and free flame.
10 cl, 1 dwg
FIELD: textile industry, in particular, production of combined current-conductive threads used for manufacture of protective current-conductive gloves.
SUBSTANCE: method involves producing current-conductive threads having linear density of from 200 to 400 tex by forming current-conductive blank through winding of two-four plated threads onto one carbon fiber used as core, said winding being performed in various directions and number of windings constituting 5-20 coils per 1 m; providing further winding using threads Pycap having greater rupture loading. Winding equipment to be used should provide 260-370 coils per 1 m.
EFFECT: improved strength, increased wear resistance and reduced electric resistance of threads produced by method.
2 cl, 2 dwg, 1 ex
FIELD: textile industry, in particular, manufacture of twisted reinforced thread.
SUBSTANCE: method involves introducing two non-twisted complex threads into fibrous flow of semi-finished product obtained in the process of drawing by means of drawer of ring spinning machine; determining distance between threads by multiplying empiric coefficient of 0.7-1.3 by partial of dividing the value of linear density of joining thread (tex) by value of linear density of joining thread fiber (tex), said values being multiplied by diameter of joining thread fiber (mm); in formed twisting triangle, twisting threads together with joining thread while dividing joining thread fibers into two parts to produce reinforced components, which are in their turn twisted together with each other.
EFFECT: improved physico-mechanical properties of threads owing to creating homogeneous elastoplastic composition, and increased wear-resistance of thread.