RU2114942C1 - Carbon woven material - Google Patents

Abstract

FIELD: carbon woven materials. SUBSTANCE: carbon woven material has carbon thread of warp secured with carbon thread of weft located in the form of bundles uniformly over length of woven material. Warp and weft additionally have nonconducting threads alternating with carbon thread. Warp carbon thread with linear density of at least 30 tex are wound with nonconducting thread having linear density of 5-15 tex. Interval between turns is 0.5-1.5 mm, distance between threads is determined by the relation given in the invention Description. Bundles of weft carbon threads are located so that distance between them exceeds 2d but not more than half of material width. Bundles of weft carbon threads have not less than two threads with linear density of not less than 30 tex nonwound or wound with nonconducting thread with linear density of 5-15 tex and interval between turns measuring 0.5-1.5 mm. EFFECT: extended functional potentialities of electric heating elements. 2 cl, 1 dwg , 1 tbl

Description

 The invention relates to the textile industry and can be used in various fields of technology, for example, in the manufacture of various heating elements used in the construction of electric heating devices.

 Known fabric used as a resistive element of a flat heater, made using carbon and glass fibers, and the carbon fibers are located at a distance of 7 mm from each other both on the basis and on the weft (application France 2681753, CL H 05 B 3 / 36, 1991).

 Known fabric made on the basis of and a weft of electrically conductive and non-electrically conductive yarns, laid alternately, and non-conductive yarns are made of complex cotton threads. The volume ratio of non-conductive to conductive warp threads is 1: 1-1: 1.5, and the volume ratio of conductive warp and weft is 1: 1.5-1: 10 (RF patent 2046552, CL H 05 B 3/36, 1995).

 Known fabric containing conductive weft threads that are fastened with non-conductive warp threads, and the current lead (electrode) is carried out by two bundles of conductive warp threads located at the edges of the fabric. It is proposed to use metallic or carbon filaments as electrically conductive filaments (UK application 1490534, CL H 05 B 3/34, 1977).

 The closest technical solution is a carbon woven material in the form of a tape containing unidirectional warp threads made of carbon, fastened with carbon weft threads arranged discreetly in bundles along the length of the tape, while the warp threads are laid with a distance between them of the order of their diameter, and the distance between the bundles of weft threads is taken the order [1].

 However, the used fabric structures do not allow controlling the density of electric power, and therefore, the temperature on the surface of the fabric over a wide range for one cycle of manufacturing such a fabric on weaving equipment. This limits the scope of technical application of fabrics as electric heating elements.

 The technical task of this invention is to expand the functionality of electric heating elements in which the woven material of the claimed structure is used.

,
где;
P_уд- заданная удельная электрическая мощность, Вт/м²;
V - напряжение питания, В;
Т - линейная плотность углеродной нити, текс;
a - длина тканого материала, м;
b - ширина тканого материала, м;
c - коэффициент, зависящий от соотношения линейного электрического сопротивления, крутки и линейной плотности углеродной нити, кг•Ом/м,
а необвитые или обвитые неэлектропроводной нитью линейной плотности 5 - 15 текс с расстоянием между витками 0,5 - 1,5 мм углеродные нити утка линейной плотности не менее 30 текс расположены в виде пучков, содержащих не менее двух нитей, дискретно по длине тканого материала так, что расстояние между пучками больше 2d, но не более половины ширины тканого материала.The solution to the problem is due to the fact that in a carbon woven material containing carbon warp threads bonded by carbon weft threads arranged in bundles uniformly along the length of the material, the warp and weft additionally contain non-conductive threads laid alternating with carbon threads, and carbon threads basics of linear density of at least 30 tex are twisted in a spiral with a non-conductive thread of linear density 5 - 15 tex with a distance between turns of 0.5 - 15 mm and are evenly spaced across the width of the woven fabric rial so that the distance between them is determined from the ratio, see:

,
Where;
P _beats - a given specific electric power, W / m ² ;
V is the supply voltage, V;
T is the linear density of the carbon fiber, tex;
a is the length of the woven material, m;
b is the width of the woven material, m;
c is a coefficient depending on the ratio of linear electrical resistance, twist and linear density of the carbon fiber, kg • Ohm / m,
and unweaved or entwined with a non-conductive filament of linear density of 5-15 tex with a distance between turns of 0.5-1.5 mm, carbon weft of linear density of at least 30 tex are arranged in bundles containing at least two threads, discrete along the length of the woven material so that the distance between the beams is more than 2d, but not more than half the width of the woven material.

 The drawing shows the structure of a carbon woven material consisting of complex carbon warp yarns 1, which are connected by bundles of complex weft yarns 2, and non-conductive warp and weft yarns 3.

 The distance between the carbon fiber bundles of the weft is of the order of 1, and between the carbon warp threads is of the order of d.

 Samples of the woven material were obtained on conventional textile equipment: warping machine brand SL-140, loom brand AT-100, upholstery machine.

 As a non-conductive thread, you can use kapron, lavsan, natural and other threads. Examples of carbon woven materials are shown in the table.

 Thus, the carbon woven material of the claimed structure is made in one cycle on conventional weaving equipment, which allows you to create a heating element with a given specific power, and therefore, with a given temperature field on the surface of the material, taking into account the characteristics of carbon filaments and such parameters as the voltage of the heating element , its dimensions.

Claims (2)

1. Carbon woven material containing carbon complex warp yarns, bonded by carbon weft yarns arranged in bundles uniformly along the length of the woven material, characterized in that the warp and weft further comprise non-conductive yarns laid alternating with carbon threads, carbon warp threads of a linear density of at least 30 tex are entwined with a non-conductive filament of linear density of 5 to 15 tex with a distance between turns of 0.5 to 1.5 mm and arranged so that the distance between them is determined from the ratio, see:

where P _beats - a given specific power, W / m ² ;
V is the supply voltage, B;
T is the linear density of the carbon fiber, tex;
a, b - length and width of the material, m;
c is a coefficient depending on the ratio of linear electrical resistance, twist and linear density of the carbon fiber, kg • Ohm / m,
and the bundles of carbon weft threads are arranged so that the distance between them is greater than 2d, but not more than half the width of the material.  2. The material according to claim 1, characterized in that the carbon fiber bundles of the weft contain at least 2 filaments of linear density of at least 30 tex, unweaved or entwined with a non-conductive filament of linear density of 5 to 15 tex with a distance between turns of 0.5 to 1.5 mm

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