TWI749322B - Elastic conductive composite fabric - Google Patents

Abstract

An elastic conductive composite fabric includes a fabric layer and an elastic conductive layer formed on the fabric layer. The fabric layer has elasticity. The elastic conductive layer includes at least one elastic body and conductive filler. The resistance value and the elastic strain increment of the elastic conductive composite fabric satisfy the following relationship: R _T =R+nε/R _T =R+m e ^nε . Wherein ε is an elastic strain increment, R is a resistance value when the elastic strain increment is 0, R_T is a resistance value when the elastic conductive composite fabric is deformed by an external force, and m and n are coefficients. The m and n are decimals or integers. The elastic conductive composite fabric obtains the strain increment of the elastic conductive composite fabric by detecting the change of the resistance value of the elastic conductive composite fabric, thereby analyzing the variation of the flexion and extension motion of the limb.

Description

Elastic conductive composite fabric

The invention relates to the field of smart wearable products, in particular to an elastic conductive composite fabric.

In recent years, people’s demand for smart wearable products has increased. With the development of smart wearable products, the positioning of smart wearable products is mainly based on sports, positioning, and calls, especially in healthy and leisure life. Under the current trend, sports fitness has become an important application field of smart wearable products. The transformation and amplitude of body movements (such as flexion and extension) during exercise directly affects the effectiveness of fitness; however, improper exercise may cause permanent s damage. In the prior art, smart wearable products are often made of conductive fabrics. The conductive fabric in the prior art is usually a highly elastic conductive knitted fabric. This type of fabric adjusts the blending ratio of ultrafine metal fibers and elastic yarns to control the feel, high elasticity and high conductivity of the conductive fabric. However, the highly elastic conductive knitted fabric in the prior art cannot intuitively understand the change and amplitude of the user's limb movement through the highly elastic conductive knitted fabric.

In view of this, the present invention provides an elastic conductive composite fabric that can intuitively understand the change and amplitude of the user's limb movement.

An elastic conductive composite fabric includes a fabric layer and an elastic conductive layer formed on the fabric layer. The fabric layer has elasticity. The elastic conductive layer is composited by at least one elastomer and conductive filler. The resistance value and the elastic strain increment of the elastic conductive composite fabric satisfy the following relationship: R _T =R+nε/R _T =R+m e ^nε . Among them, ε is the elastic strain increment; R is the resistance value when the elastic strain increment is 0; R _T is the resistance value when the elastic conductive composite fabric is deformed by an external force; m and n are coefficients, which are decimals or integers. .

Further, the fabric layer includes a fabric layer body and a plurality of elastic yarns, and the elastic yarns are arranged in the fabric layer body along a first direction and/or a second direction, wherein the first The direction refers to the direction along the X axis, and the second direction refers to the direction along the Y axis.

Further, the elastic conductive composite fabric has an elastic coefficient E ₁ , the fabric layer body has an elastic coefficient E ₂ , and the ratio between the E ₁ and E ₂ is between 1.2 and 1.6.

Further, the elastic conductive layer has adhesiveness, and the elastic conductive layer is adhered to the fabric layer.

Further, in the elastic conductive layer, the quality percentage of the conductive filler is 30% to 60%, and the resistance value of the elastic conductive layer is between 10 ^-1 to 10 ⁴ ohms.

Further, in the elastic conductive layer, the quality percentage of the conductive filler is 10% to 30%, and the resistance value of the elastic conductive layer is between 10 ² to 10 ⁵ ohms.

Further, when the resistance value and the elastic strain increment of the elastic conductive composite fabric satisfy R _T =R+nε , where n is between 1.0 and 2.5.

Further, when the resistance value and the elastic strain increment of the elastic conductive composite fabric satisfy R _T =R+m e ^nε , m is between 9.0 and 10.0; n is between 0.05 and 0.06.

Further, the shape of the conductive filler is in the form of particles, powder, wire or fiber, and the material of the filler is gold, silver, structural silver, copper, iron, nickel, stainless steel, carbon black, graphene, nanotubes or High molecular polymer with conductivity.

Further, the elastomer is an elastic polymer material, and the elastomer is styrene, olefin, diene, vinyl chloride, urethane, ester, amide, organic fluorine, or silicone Type or ethylene type thermoplastic elastomer.

The elastic conductive composite fabric provided by the present invention has an elastic conductive layer connected with an elastic fabric layer, the elastic conductive layer can be connected to various external devices or electronic components, and the elastic strain of the elastic conductive composite fabric and its resistance change Correspondingly, there is an exponential or linear relationship. Therefore, by detecting the change in the resistance value of the elastic conductive composite fabric, the strain increment of the elastic conductive composite fabric can be obtained, and the limb flexion can be analyzed according to the change in the strain increment And stretching exercises.

100: Elastic conductive composite fabric

12: Fabric layer

121: Fabric layer body

122: elastic yarn

11: Elastic conductive layer

D1: First direction

D2: second direction

Fig. 1 is a schematic side view of an elastic conductive composite fabric provided by a preferred embodiment of the present invention.

Fig. 2 is a top view of the fabric layer of the elastic conductive composite fabric shown in Fig. 1.

Fig. 3 is a cross-sectional view taken along the line III-III shown in Fig. 2.

Fig. 4 is a cross-sectional view taken along the line IV-IV shown in Fig. 2.

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to another element or a centrally arranged element may exist at the same time. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terminology used in the description of the present invention herein is only for the purpose of describing specific embodiments, and is not intended to limit the present invention.

Referring to FIGS. 1-4, a preferred embodiment of the present invention provides an elastic conductive composite fabric 100. The elastic conductive composite fabric 100 includes a fabric layer 12 and an elastic conductive layer 11 formed on the fabric layer 12. The fabric layer 12 has elasticity. The elastic conductive layer 11 is composited by at least one elastomer and conductive filler. The resistance value and the elastic strain increment of the elastic conductive composite fabric 100 satisfy the following relationship: R _T =R+nε/R _T =R+m e ^nε . Wherein, the ε is the elastic strain increment; R is the resistance value when the elastic strain increment is 0; R _T is the resistance value when the elastic conductive composite fabric 100 is deformed by an external force; m and n are coefficients, which are Decimal or integer.

Since the elastic conductive composite fabric 100 has elasticity, when the elastic conductive composite fabric 100 is loaded with a tensile external force, it can respond to elastic deformation immediately and can quickly return to the original state after the tensile external force is unloaded.

Since the elastic conductive composite fabric 100 has conductivity, the elastic conductive composite fabric 100 can be connected to various external devices or electronic components, and the elastic strain of the elastic conductive composite fabric corresponds to its resistance change and has an exponential or linear relationship. Therefore, the resistance value of the elastic conductive composite fabric can be converted into a corresponding output signal. The output signal can be directly observed by the user in a terminal product. Variety.

Wherein, the fabric layer 12 includes a fabric layer body 121 and a plurality of elastic yarns 122. Wherein, the elastic yarn 122 is woven in the fabric layer along a first direction D1 and/or a second direction D2 体121内. Wherein, the first direction refers to a direction along the X axis, and the second direction refers to a direction along the Y axis. In this embodiment, the elastic yarn 122 is arranged in the fabric layer main body 121 along a first direction D1.

Wherein, the elastic yarn 122 is a fiber of 60 to 100 deniers, and preferably, the elastic yarn 122 is a fiber of 80 deniers.

Wherein, the elongation of the fabric layer 12 in the first direction D1 and/or the second direction D2 is 10%-50% of the initial length of the fabric layer 12. The elongation of the fabric layer 12 can be designed according to the body shape of the wearer, and the Denier number of the elastic yarn 122 and the structure of the fabric layer 12 can be adjusted according to the body shape.

Wherein, the elastic conductive composite fabric 100 has a coefficient of elasticity E ₁ , the body of the fabric layer 12 has a coefficient of elasticity E ₂ , and the ratio between the E ₁ and E ₂ is between 1.2 and 1.6, so that the The elastic conductive composite fabric 100 can instantly respond to the flexion and extension of the limbs during the process of being worn.

Wherein, the fabric layer body 121 may be a knitted fabric or a three-dimensional fabric structure. The material of the fabric layer main body 121 can be TC blended yarn, polyester, nylon, polyacrylonitrile and the like. Among them, TC blended yarn refers to polyester and cotton blended yarn.

Wherein, the material of the elastic yarn 122 is polyurethane (PU) material, which can be OP yarn, spandex fiber, Lycra fiber, etc. In this embodiment, the material of the elastic yarn 122 is a fiber with a trade name of Lycra.

In one embodiment, the elastic conductive layer 11 is a preformed patterned film, and the preformed patterned film is laminated on the fabric layer 12 at low temperature, so that the preformed patterned film Connect with the fabric layer 12. Wherein, the low temperature is 90°C to 130°C.

In another embodiment, the elastic conductive layer 11 is formed by directly coating or screen printing a solution formed by compounding the elastomer and the conductive filler on the fabric layer 12, patterning and drying with low-temperature hot air. of. Wherein, the low temperature is 80°C to 140°C.

The above-mentioned connection manner of the elastic conductive layer 11 and the fabric layer 12 makes the elastic conductive layer 11 adhesive and can be combined with the fabric layer 12, so that the elastic conductive composite fabric can be bent or twisted , Without interface delamination.

In one embodiment, in the elastic conductive layer 11, the quality percentage of the conductive filler is 30% to 60%, and the resistance value of the elastic conductive layer 11 is in the range of 10 ^-1 to 10 ⁴ ohms. between.

In another embodiment, in the elastic conductive layer 11, the quality percentage of the conductive filler is 10% to 30%, and the resistance value of the elastic conductive layer 11 is between 10 ² and 10 ⁵ ohms. between.

Wherein, the conductive filler is in the form of particles, powder, threads or fibers.

Wherein, the material of the conductive filler is a conductive metal material or a non-metal material. Specifically, the conductive filler is made of metal materials such as gold, silver, copper, iron, nickel, and stainless steel, or non-metallic materials such as carbon black, graphene, nanotubes, and high-molecular polymers with conductivity.

Wherein, the elastomer is an elastic polymer material. The elastomer may be styrene, olefin, diene, vinyl chloride, urethane, ester, amide, organic fluorine, silicone, or vinyl thermoplastic elastomer. Specifically, the elastomer may be styrene/butadiene/styrene block copolymer (SBS); styrene/isoprene/styrene block copolymer (SIS); styrene/hexene- Butene/styrene block copolymer (SEBS), styrene/ethylene-propylene/styrene block copolymer (SEPS), thermoplastic polyurethane (TPU), etc.

Wherein, when the resistance value and the elastic strain increment of the elastic conductive composite fabric satisfy R _T =R+nε , n is between 1.0 and 2.5.

Wherein, when the resistance value and the elastic strain increment of the elastic conductive composite fabric satisfy R _T =R+m e ^nε , m is between 9.0 and 10.0; n is between 0.05 and 0.06.

Hereinafter, the present invention will be described in detail through specific embodiments.

Example 1

First, the conductive filler with a quality percentage of 30% is uniformly mixed with TPU (elastomer), and the uniformly mixed conductive filler and elastomer are placed in a patterned jig to form a film in advance to obtain an elastic For the conductive layer 11, press the elastic conductive layer 11 and the fabric layer 12 for 8 to 35 seconds at a low temperature of 90~130°C and a pressure of 2MPa~8Mpa, so that the elastic conductive layer 11 is The fabric layers 12 are joined together to obtain an elastic conductive composite fabric 100. Wherein, the resistance value of the elastic conductive composite fabric 100 is between 100 Ω and 10 ³ Ω. After that, a force is applied to the elastic conductive composite fabric 100, and the elastic conductive composite fabric 100 stretches under the tension. Finally, the resistance value of the elastic conductive composite fabric 100 and the length strain increment of the elastic conductive composite fabric 100 under different tensions are measured.

Wherein, in Example 1, the length strain increment of the elastic conductive composite fabric 100 is ε, and the relationship between _{the resistance value R T and the strain increment ε of the elastic conductive composite fabric 100 is: R T} =10.35e ^{0.33 ε} , where ε can be an integer or a decimal.

Example 2

First, the conductive filler with a quality percentage of 60% is uniformly mixed with TPU and SEBS (elastomer), and the uniformly mixed conductive filler and elastomer are directly coated on the fabric layer 12, and then 110 Drying with hot air at ℃ for 20 minutes, an elastic conductive layer 11 and an elastic conductive composite fabric 100 are obtained. Wherein, the resistance value of the elastic conductive composite fabric 100 is between 10 ^-1 Ω and 10 ² Ω. After that, a force is applied to the elastic conductive composite fabric 100, and the elastic conductive composite fabric 100 stretches under the tension. Finally, the resistance value of the elastic conductive composite fabric 100 and the length strain increment of the elastic conductive composite fabric 100 under different tensions are measured.

Wherein, in Example 2, the length strain increment of the elastic conductive composite fabric 100 is ε, and the relationship between _{the resistance value R T and the strain increment ε of the elastic conductive composite fabric 100 is: R T} =0.75+1.68 ε ^ε , where ε can be an integer or a decimal.

The present invention also provides an electronic product 200 using the elastic conductive composite fabric 100 to detect and display the resistance value and resistance value changes of the elastic conductive composite fabric.

It can be seen from the above that the elastic strain increment of the elastic conductive composite fabric 100 corresponds to its resistance change and has an exponential or linear relationship. Therefore, by detecting the resistance change of the elastic conductive composite fabric, the elastic conductive composite fabric can be obtained. The strain increment of the composite fabric 100 can be used to analyze changes in the flexion and extension of the limbs according to the change in the strain increment.

In addition, the fabric layer 12 of the elastic conductive composite fabric 100 is insulated from the human body, and the elastic conductive layer 11 is not in direct contact with the human body. Therefore, the human body does not affect the resistance value of the elastic conductive composite fabric 100.

Furthermore, the elastic conductive composite fabric 100 also has the properties of breathability, skin-friendliness, comfort and softness.

The above are only the preferred embodiments of the present invention and do not limit the present invention in any form. Although the present invention has been disclosed as the preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the profession , Without departing from the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or modification into equivalent implementations with equivalent changes, provided that the technical content of the present invention is not deviated from the technical essence of the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solutions of the present invention.

100: Elastic conductive composite fabric

12: Fabric layer

11: Elastic conductive layer

D1: First direction

D2: second direction

Claims (10)

An elastic conductive composite fabric, comprising a fabric layer having elasticity, wherein the elastic conductive composite fabric further includes an elastic conductive layer formed on the fabric layer, and the elastic conductive layer is composed of at least one elastic conductive layer. The resistance value and the elastic strain increment of the elastic conductive composite fabric satisfy the following relationship: R _T =R+nε/R _T =R+m e ^nε ; where ε is the elastic strain increment , R is the resistance value when the elastic strain increment is 0, R _T is the resistance value when the elastic conductive composite fabric is deformed by an external force, m and n are coefficients, which are decimals or integers. The elastic conductive composite fabric according to claim 1, wherein the fabric layer includes a fabric layer body and a plurality of elastic yarns, and the elastic yarns are arranged in the first direction and/or the second direction. In the body of the fabric layer, the first direction refers to the direction along the X axis, and the second direction refers to the direction along the Y axis. The elastic conductive composite fabric according to claim 1, wherein the elastic conductive composite fabric has an elastic coefficient E ₁ , the fabric layer body has an elastic coefficient E ₂ , and the ratio between _{E 1} and E _{2 is between} Between 1.2~1.6. The elastic conductive composite fabric according to claim 1, wherein the elastic conductive layer has adhesiveness, and the elastic conductive layer is adhered to the fabric layer. The elastic conductive composite fabric according to claim 1, wherein, in the elastic conductive layer, the quality percentage of the conductive filler is 30% to 60%, and the resistance value of the elastic conductive layer is 10 ^{− Between 1} ~10 ⁴ ohms. The elastic conductive composite fabric according to claim 1, wherein, in the elastic conductive layer, the quality percentage of the conductive filler is 10%-30%, and the resistance value of the elastic conductive layer is 10 ² ~10 ⁵ ohms. The elastic conductive composite fabric according to claim 1, wherein, when the resistance value and the elastic strain increment of the elastic conductive composite fabric satisfy R _T =R+nε , n is between 1.0 and 2.5. The elastic conductive composite fabric according to claim 1, wherein when the resistance value and the elastic strain increment of the elastic conductive composite fabric satisfy R _T =R+m e ^nε , m is between 9.0 and 10.0, and n is between 0.05 ~0.06. The elastic conductive composite fabric according to claim 1, wherein the conductive filler is in the form of particles, powder, thread or fiber, and the material of the filler is gold, silver, copper, iron, nickel, stainless steel, carbon Black, graphene, nanotube or conductive polymer. The elastic conductive composite fabric according to claim 1, wherein the elastomer is an elastic polymer material, and the elastomer is styrene, olefin, diene, vinyl chloride, urethane, ester , Amines, organic fluorine, organic silicon or vinyl thermoplastic elastomers.

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