Structure from durable high-conductivity synthetic fabric

FIELD: technological processes; chemistry.

SUBSTANCE: fiber has channeled cross section, channels of which are essentially filled with electroconductive polymer material, which is mechanically fixed in place, and represents polypetalous monothread, at that it is coated with conductive polymer material. Surface of this monothread includes one or more C-shaped channels that pass along full length of fiber, so that mechanical cohesion with reciprocal junction is created between monothread and conductive polymer that fills channels. Conductive fabric includes multiple specified oriented polymer fibers that contain electroconductive polymer material, which is introduced into specified fiber either in the form of mixture or as coating.

EFFECT: capability to disperse static electricity and resistance to creasing and formation of folds.

23 cl, 1 dwg, 1 ex

 

The technical field

The present invention relates to the design of the conductive fabric, in particular, to the design, which effectively dissipates static charge and at the same time has the desired physical properties.

The level of technology

Until recently, to obtain conductive fabrics used, for example, to dissipate static electricity, used monofilament with a high content of conductive materials, such as carbon black or metal powders. In this case, as a rule, these conductive materials were either dispersed in the polymer base, such as polyethylene terephthalate and polyamide, or was part of the polymer coatings applied on top of the oriented monofilaments.

These traditional methods have some limitations. First, the conductivity of the fibres, containing fillers, is only in the range of 10-4up to 10-7Cm/cm, i.e. the minimum value necessary for the effective dissipation of static charge. Unfortunately, this shortcoming limits the choice of design fabric, and also degrades performance fabric. The second drawback is that in the case of completely filled products is the deterioration of the physical properties of the monofilament, such as young's modulus, tear resistance and considers the aspects of the elongation. The reason for this is that when the concentration of the fillers in excess of 20% of a conductive filler, there is a strong contamination of the material. Specified deterioration of physical properties also limits the choice of design fabrics and badly affects its performance. Another drawback is traditionally manufactured of conductive fabrics is that coatings containing a high concentration of additives, based on carbon, exhibit reduced resistance to abrasive wear and have low adhesiveness. Thus, there is deterioration as the durability of the fabric and its scattering properties.

Other manufactured by traditional methods tissue include conductive coatings, design of a metal wire or composite structures including an additional metal fiber in a synthetic structure. However, such fabrics also have their drawbacks. For example, despite the fact that such manufactured traditional ways design can dissipate static charge, it should be noted that the fabrication of structures, including metal wire, is difficult. Another disadvantage of tissues, including metal parts, is that they are easily subject to damage, and, in particular, the process operation is then subjected to unwanted wrinkling and form creases. On the other hand, structures with coatings made by conventional methods do not have sufficient wear resistance, and have low permeability in comparison with cellular structures with open cells.

A potential solution to these problems can serve as an introduction to fabric electrically conducting polymers. While conducting polymers can be used alone or in alloy form conjugated polymers. In addition, the use of such polymers has made it possible to obtain values of conductivity, comprising 30-35×103S/cm, which is only an order of magnitude lower conductivity of copper. However, the polymer must not only have sufficient conductivity, but also be stable in air at the operating temperature and to maintain its conductivity over a long period of time. In addition, the conductive polymeric material must have the necessary technological characteristics and mechanical properties suitable for specific applications.

Brief description of the invention

Thus, the main objective of the present invention is the introduction of conductive polymers in the form convenient for the manufacture of durable fabric structures.

This and other objectives of the present invention is solved by means of this izobreteny is. In this respect, the present invention is directed to the design of durable, highly conductive synthetic fabric. Primarily the present invention includes the use of functional fibers containing conductive polymer material. As a result, the ability of the specified synthetic fabric, including such conductive fibers, for dissipation of static electricity close to the same capacity previously available metallic fabrics, and physical properties when compared with the non-conductive properties of the tissues. Thus, the design proposed according to the invention allows the fabric to avoid collapse and formation of creases inherent in the structures of the metal-containing tissues.

Brief description of drawing

For a better understanding of the present invention, its objectives and advantages of the description of the invention will be accompanied by reference to the following drawing, which shows a cross-section of the multi-leaf monofilament coated with conductive polymer, in accordance with the present invention.

Detailed description of preferred examples of implementation.

A preferred example implementation of the present invention will be described in the context of designed fabrics with desired properties, such as fabrics used DL is the manufacture of non-woven textile aerodynamic hollofibre, aerodynamic method from the melt and/or method of molding ejection of high-speed air flow (draw method). However, it should be noted that the present invention can also be applied to other industrial fabrics used in the "dry" production, requiring the dissipation of static electricity, for example, through a belt drive (belting media). Design fabrics include woven, non-woven, spiral United (spiral-link fabric, fabric, placing the thread in the MD and CD directions, knitted fabrics, extruded mesh and spiral wound strips of woven and nonwoven materials. These tissues may include monofilament, twisted a few additions strands of monofilament, filament yarn of filament yarn or twisted in several additions yarn of synthetic filament yarn; they can also be single-layer, multilayer or laminated.

From detailed examination of the drawing it is seen that the invention provides for the manufacture of fabrics, including, as shown in the drawing (side view), working (functional) fibre (fiber) 10 containing a conductive polymer material 14. Thus, despite the fact that conducting polymers are generally of sufficient strength to form of them is the current load of the fiber 10, the present invention includes the use of these conductive materials 14, either as mixtures or in the form of coatings, along with polymeric materials that can be oriented to provide physical properties required for the formation of durable tissue structures. Mainly the scattering properties of tissue containing at least 5% of these conductive fibers 10, the equivalent scattering properties, which previously could only be obtained for metal-containing tissues, while their physical properties equivalent to the properties of the non-conductive tissue. Consequently, the fabric containing the fiber 10, to avoid collapse and formation of creases inherent in the structures of the metal-containing tissues.

In particular, the invention includes an introduction conductive polymer 14 in the form of a mixture in the monofilament 12 with sufficient thermal stability. In another embodiment, the present invention provides for the use of bicomponent fibers containing conductive polymer 14 and manufactured by extrusion of the melt. As another example, figure 1 shows a preferred example of implementation in which the conductive polymer 14 is applied to the monofilament 12 in the form of a coating. Methods of coating include, for example, coating what dives, deposition from a solution, dispersion on the oriented monofilament, thermal spraying or other means suitable for this purpose. It should be noted that there is at least one class of conductive polymers, namely polyaniline, of which the obtained fiber with high electrical conductivity and physical properties comparable to the physical properties of polyamides. Thus, in accordance with the present invention provides the use of these conductive fibers directly for the manufacture of fabrics.

The drawing shows a cross-section obtained according to the example implementation of a coating of conductive polymer material 14 on multilobe monofilament 12. Mainly this method increases the electrical conductivity of the fibers to values in excess of 10-3S/cm (preferably greater than 103Cm/cm), but allows to preserve the physical and tribological properties of the monofilament. Another advantage is that the surface 16 of the monofilament 12 includes many of the C-shaped grooves 18 along the entire length of the fiber; however, these grooves may be made in the process of extrusion of the monofilament 12. As a result, between the monofilaments 12 and a polymeric material 14, filling the grooves 18 formed IU anicescu grip. Thus, this configuration allows the use of polymer 14 with a lower adhesion to the monofilament 12. Another advantage of this configuration is that the highly conductive polymer 14 is constantly available on the surface 16 of the monofilament, and even if the monofilament 12 is subjected to wear, it still continues to close and protect the polymeric material 14. In addition, this protected location of the conductive polymer 14 makes less critical such disadvantages as low abrasion resistance and less satisfactory physical properties. In this regard, it is obvious that in addition to the circular cross section shown in the drawing, the monofilament 12 may also have a cross-section of non-circular shape, such as rectangular, square, trapezoidal, oblong, oval, conical, radial, or other non-circular shape suitable for the specified target.

Another advantage of the present invention is that the percentage mass fraction of the conductive polymer 14 in the fiber 10 can be as few as 10 wt.% or less. This allows to increase the cost of fabric production, which at the same time allows you to effectively dissipate static charge. In this regard, the classes of conductive polymers 14, which can be used include: polyacetylene (RA), polythiophene (R is), poly-3-alkylthiophene (RAT), polypyrrole (RDD), polyisocyanates (PITN), poly(ethylenedioxythiophene) (PEDOT), alkoxy-substituted poly(para-phenylenevinylene) (PPV), poly(para-phenylenevinylene) (PPV), poly(2,5-dialkoxy-para-phenylene, poly(para-phenylene) (PPP), multilink poly(para-phenylene) (LPPP), poly(para-phenylene)sulfide (PPS), polypeptides (RNT), poly(3-hexylthiophene) (RNT), polyaniline (PANI).

Thus, the objectives and advantages of the present invention are achieved, and despite the fact that in the present description have been described and discussed in detail preferred examples of its implementation, the scope of the present invention is not limited to these examples; on the contrary, the scope of the present invention defined in the following claims.

1. Polymer fiber, which is intended for use in industrial fabrics, which has a grooved cross-section, the grooves of which are essentially filled with a conductive polymeric material, mechanically fastened in place, and which is a multilobe monofilament, and this monofilament coating of conductive polymer material and the surface of the monofilament comprises one or more of the C-shaped grooves that run along the entire length of the fiber, so that between monofilament and a conducting polymer, filling the holding grooves, forms a mechanical coupling with a mutual connection.

2. The fiber according to claim 1, with the specified fiber includes a conductive polymeric material mixed with a polymer material which can be oriented.

3. The fiber according to claim 1, with the specified fiber is a bicomponent fiber containing conductive polymer material and is made by extrusion from the melt.

4. The fiber according to claim 1, with the specified fiber includes oriented structure, covered with a conductive polymer material.

5. The fiber according to claim 1, in which a conductive polymer is applied to one of the following methods: coating by dipping, spraying from solution, dispersion on the monofilament and thermal spraying.

6. The fiber according to claim 1, with the specified fiber includes one hundred percent of the conductive polymer material selected from the class polyaniline.

7. The fiber according to claim 6, with the specified polyaniline fiber has physical properties comparable to the physical properties of polyamide fibers.

8. The fiber according to claim 1, in which the minimum electrical conductivity of the coating is more than 10-3Siemens/cm, preferably more than 10-3Siemens/cm while maintaining the physical and tribological properties of monofilament core.

9. The fiber according to claim 1, in which the specified clutch destinat is a rule for to use a conductive polymer with a lower adhesion to the monofilament.

10. The fiber according to claim 1, in which the specified configuration is such that as wear monofilament conductive polymer will be available permanently on the surface of the monofilament, so that the fiber retains conductivity.

11. The fiber according to claim 1, in which the presence of the conductive polymer in the grooves protects the specified polymer and makes less critical the effect of low abrasion resistance and other physical properties.

12. The fiber according to claim 1, in which the mass fraction of conductive material is 10 wt.% or less, by weight of the total fibre coated.

13. The fiber according to claim 1, in which the conductive polymer is selected from polyacetylene (RA), polythiophene (RT), poly-3-alkylthiophene (RAT), polypyrrole (RDD), polyisocyanates (PITN), poly(ethylenedioxythiophene) (PEDOT), alkoxy-substituted poly(para-phenylenevinylene) (PPV), poly(2,5-dialkoxy-para-phenylene, poly(para-phenylene) (PPP), multilink poly(para-phenylene) (LPPP), poly(para-phenylene)sulfide (PPS), palihapitiya (RNT) and poly(3-hexylthiophene) (RNT).

14. Conductive fabric, including many of the oriented polymer fibers, each of these fibers includes a conductive polymer material entered in the specified fiber or in the form of a mixture or in the form of a coating; and the surface monova the window includes one or more of the C-shaped grooves, passing along the entire length of the fiber, so that between monofilament and a conducting polymer, filling the grooves formed by mechanical coupling with mutual coupling, with the specified conductive fabric has the ability to dissipate static electricity, which is comparable with the similar ability of the metal-containing tissues, and is resistant to creasing and wrinkling.

15. Fabric 14, in which the content of functional fibers ranges from five to one hundred percent by weight of the fabric.

16. The fabric on 14, for which the ability to dissipate static electricity close to the same ability of the metal-containing tissues, and physical properties comparable to the properties of non-conductive synthetic fabrics.

17. The fabric on clause 16, to which these physical properties include one of the following properties: young's modulus, tear resistance, hardness, adhesiveness, abrasion resistance and durability.

18. Fabric 14, in which the fiber is a fiber according to claims 1-13.

19. The fabric 14 in which the composition allows to increase the cost of fabric production, however, the fabric allows you to effectively dissipate static charge.

20. The fabric 14, and the fabric is a single layer, multilayer or laminated.

2. The fabric 14, and the said fabric is a woven material, nonwoven material, spirally connected fabric, fabric, placing the thread in the MD and CD directions, knitted fabric, extruded mesh or coiled strip of woven and nonwoven fabrics comprising yarns containing monofilament, twisted a few additions strands of monofilament, filament yarn of filament yarn, twisted a few build thread of the integrated yarn and staple fiber.

22. The fabric 14, and the fabric is constructed of cloth, used for the production of non-woven textile aerodynamic hollofibre, aerodynamic method from the melt and/or method of molding ejection of high-speed air flow (draw method).

23. The fabric 14, and the specified fabric used in dry industries that require the dissipation of static electricity through a belt drive.



 

Same patents:

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10 cl, 3 dwg

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The invention relates to textile production

FIELD: technological processes; chemistry.

SUBSTANCE: fiber has channeled cross section, channels of which are essentially filled with electroconductive polymer material, which is mechanically fixed in place, and represents polypetalous monothread, at that it is coated with conductive polymer material. Surface of this monothread includes one or more C-shaped channels that pass along full length of fiber, so that mechanical cohesion with reciprocal junction is created between monothread and conductive polymer that fills channels. Conductive fabric includes multiple specified oriented polymer fibers that contain electroconductive polymer material, which is introduced into specified fiber either in the form of mixture or as coating.

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23 cl, 1 dwg, 1 ex

FIELD: technological processes; chemistry.

SUBSTANCE: fiber has channeled cross section, channels of which are essentially filled with electroconductive polymer material, which is mechanically fixed in place, and represents polypetalous monothread, at that it is coated with conductive polymer material. Surface of this monothread includes one or more C-shaped channels that pass along full length of fiber, so that mechanical cohesion with reciprocal junction is created between monothread and conductive polymer that fills channels. Conductive fabric includes multiple specified oriented polymer fibers that contain electroconductive polymer material, which is introduced into specified fiber either in the form of mixture or as coating.

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23 cl, 1 dwg, 1 ex

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23 cl, 1 dwg, 1 ex

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7 cl, 6 tbl, 8 ex

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10 cl, 1 dwg

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10 cl, 1 dwg

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