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Central connected periodic structure-based textile product and preparation and application methods there

A periodic structure and textile technology, applied in the decoration of textiles, textiles and papermaking, textiles, etc., can solve the problems that solid-shaped structures are not suitable for low-frequency resonance points, resonance frequency differences, and affect practical performance, etc., to achieve good breathability and wearability The effect of comfortable performance, large size and easy processing

Pending Publication Date: 2018-03-23
THE QUARTERMASTER EQUIP INST OF THE LOGISTICAL SUPPORT DEPT CMC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology has proposed a general preparation method and a feasible basic principle, but it is a very complicated scientific issue for the specific application and design principles of the frequency selective surface.
[0004] For specific frequencies and requirements, in order to successfully develop products that meet the requirements, the following aspects need to be carefully studied: 1) The shape of the periodic structure needs to be designed: there are four types of commonly used periodic structures, including ring, center connection, and solid , Combined type, etc. Different structural shapes need to be prepared by different methods and are suitable for specific purposes. For example, ring structures are not suitable for direct etching on conductive substrates, and solid structures are not suitable for low-frequency resonance points, etc.; 2 ) needs to calculate the size of the periodic structure: on the one hand, for a specific frequency, there are significant differences in the size corresponding to different shapes, which affects the practical performance; If the part size is too large, it will cause grating lobes, if it is too small, it will cause processing difficulties, etc.; 3) It is necessary to consider the conductive substrate and non-conductive substrate, the difference in base material, the difference in the conductivity of the conductive part will lead to the difference in resonance frequency; 4) Necessary Combination of simulation theoretical calculations and practical experience: Due to the ever-changing combination of structures, sizes and substrates, in order to develop suitable materials with specific resonance frequency points, it is necessary to combine necessary theoretical calculations on the basis of known experience Less

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Central connected periodic structure-based textile product and preparation and application methods there
  • Central connected periodic structure-based textile product and preparation and application methods there
  • Central connected periodic structure-based textile product and preparation and application methods there

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Example 1: Using ordinary polyester / cotton 50 / 50 fabric as the base material, the warp and weft yarn count is 144dtex×144dtex, the warp and weft density is 330×260 / 10cm, and the square meter weight is 210g / m 2 . The cross-shaped periodic structural unit shown in Fig. 2(a) is adopted, and the dimensions are D=144mm, r=70mm, a=8mm. According to the structure and size, the cross-shaped periodic structural units are closely arranged to prepare a circular net with a size of 92cm×150cm, wherein the conductive part is the leakage part. Using conductive silver paste, the conductivity is 6.10×10 7 S / m, the conductive silver paste is printed on the polyester / cotton substrate through a rotary screen, and dried at 180°C to obtain a cross-shaped periodic structure textile printed with conductive areas and non-conductive areas. The resonance point of the textile is 0.9-1.0GHz, and the reflection coefficient at the resonance point is -32.58dB, such as image 3 shown. The textile is...

Embodiment 2

[0041] Embodiment 2: Based on the polyester conductive fabric coated with copper and nickel on the surface, the conductivity is 4.5×10 4 S / m, the warp and weft counts are 222dtex×222dtex, the warp and weft density is 486×325 / 10cm, and the weight is 190g / m 2 . On the laser cutting machine, the Y-shaped periodic structural unit shown in Figure 2(b) is used, and the size D=164mm; r=80mm; a=5mm. According to this size, the conductive fabric is cut to leave interconnected conductive areas and Y-shaped non-conductive areas, that is, to obtain textiles with conductive areas and non-conductive areas arranged in arrays. The resonance point of the textile is 0.9~1.0GHz, and the reflection coefficient at the resonance is -11.03dB, such as Figure 4 shown. The textile is cut and sewed, and a complete rectangular piece contains 15 Y-shaped periodic structural units in both the warp and weft directions to obtain curtains or wall decoration fabrics, which can pass the mobile phone communi...

Embodiment 3

[0042] Embodiment 3: With plain weave nylon fabric as the base material, the warp and weft yarn counts are 389dtex / 144f, the warp and weft density is 234×210 threads / 10cm, and the square meter weight is 197g / m 2 . The cross-shaped periodic structural unit shown in Fig. 2(a) is adopted, and the dimensions are D=74mm, r=36mm, a=8mm. The structure is engraved with a concave-convex pattern on the pressure roller of the hot stamping machine, and the convex part of the pressure roller pattern is consistent with the metal area in the structure. Select the commercially available bronzing paper, put its carrier film facing up, and the transfer layer is down to be close to the fabric base, using circular pressing, flat ironing, transfer printing process, in which the heating temperature is 170°C and the pressure is 8kg / cm 2 , hot stamping time 7s. Plating layer in bronzing paper (conductivity 4×10 6 S / m) is transferred to the textile according to the designed pattern, that is, a text...

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Abstract

The invention relates to a central connected periodic structure-based textile product and preparation and application methods there. According to the central connected periodic structure-based textileproduct, conductive areas and non-conductive areas form a central connected periodic structure, wherein the non-conductive areas are not communicated with one another and are in a cross or Y-shaped central connected non-conductive structure, and every non-conductive area, together with a corresponding conductive structure, forms a cross periodic structure unit or a Y-shaped periodic structure unit. The central connecting periodic structure-based textile product can be applied to preparing light and soft textile products, which can shield electromagnetic wave hazards without affecting mobile communication 2G (second-generation, 3G (third-generation) or 4G (fourth-generation networks; compared with conventional electromagnetic shieling textile products which are integrally coated with metalor achieve certain conductive properties, the central connecting periodic structure-based textile product is only locally conductive, thereby achieving frequency selectively transmitting properties as well as good breathable, wearable and comfortable properties.

Description

technical field [0001] The invention relates to a textile based on a centrally connected periodic structure that can selectively pass mobile phone signals and cut off electromagnetic waves of other frequencies, a preparation method of the textile and the application of the textile to curtains, wall decorations, etc., and belongs to the technical field of textiles. Background technique [0002] In real life, mobile communication has become a necessity of life. my country's existing 2G, 3G, 4G network Unicom, China Mobile or Telecom mobile phones use three frequency ranges: 0.9-1.0GHz, 1.8-2.0GH, and 2.3-2.6GHz. In addition to mobile phone communication frequencies, there are also various unpredictable and different frequency electromagnetic waves flooding the living space, such as TV channels in the 48.5-958MHz frequency range, 5.8GHz wireless local area network WLAN, and electromagnetic radiation in other frequency bands, and these electromagnetic waves It will more or less...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D03D1/00B05D5/12D06Q1/12D06P5/24B23K26/402
CPCD03D1/00D06P5/003D06Q1/12B05D5/12B23K26/402
Inventor 肖红王亚静施楣梧王焰
Owner THE QUARTERMASTER EQUIP INST OF THE LOGISTICAL SUPPORT DEPT CMC
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