Conducting monofilament and fabric

FIELD: electricity.

SUBSTANCE: monofilament contains conducting material and binding agent. The fabric that dissipates static charge includes polymer monofilaments containing conducting material containing metal particles and binding agent, which is attached in the form of solid coating in longitudinal direction of the above monofilaments or solid film in longitudinal direction, which is applied to them. The above monofilaments have static charge dissipation properties.

EFFECT: invention provides creation of threads to be used in industrial fabrics, for which static charge dissipation is compulsory.

21 cl, 5 dwg

 

CROSS REFERENCES TO RELATED APPLICATIONS the Present application claimed priority under provisional patent application U.S. Conductive Monofilament and Fabric" ("Conductive monofilament and fabric") (60/993158, date of submission: 10 September 2007) and the provisional patent application U.S. Conductive Monofilament and Fabric" ("Conductive monofilament and fabric") (60/933548, filing date: June 7, 2007)that should be considered included in the present application.

The technical FIELD

The present invention relates to conductive thread and woven structure that dissipates static charge, in particular to one which effectively dissipates static charge and at the same time has the necessary physical properties.

The LEVEL of TECHNOLOGY

Known conductive fabric, suitable for dissipation of static electricity, are composed of monofilament with a high content of conductive materials, such as particles of carbon black or metal. Typically, these conductive materials dispersed in the base polymer, such as polyethylene terephthalate and polyamide, or included in a polymer coating applied over oriented monofilaments.

Specified the known methods has several drawbacks. First, the conductivity of such monofilaments is limited in the range of 10-4-10-7S/cm, which is the min is correctly necessary to effectively dissipate static charge. Unfortunately, this shortcoming limits the possibilities for constructing tissue and degrades its performance. The second disadvantage is that the maximum content in the monofilament conductive filler leads to deterioration of the physical properties of the monofilament, such as elastic modulus, strength and elongation. This is a consequence of the high impurity contamination caused by the contents of impurities in excess of 20% of the content of the conductive filler. This loss of physical properties also limit the ability to design fabric and negatively affect its performance.

Other well-known conductive fabric containing conductive coating structure with a metal wire either integrated design, combining the metal fibers with some synthetic structure. However, these fabrics also have drawbacks. For example, although the known technical solutions allow to dissipate static charge, noted the complexity of manufacturing structures with metal wires. Another drawback is that the fabric on a metal base are easily damaged, particularly on them during operation easily formed unwanted dents and bends. On the other hand, well-known fabric with coating and insufficient wear-resistant, the coating can lead to a reduction in permeability of open cellular structures.

DISCLOSURE of INVENTIONS

Thus, the main object of the invention is the creation of threads for use in industrial fabrics such as the technical fabrics used, for example, in wind production wind production from the melt, spunbond production from the melt, and drying the fabrics used for making paper, and other industrial fabrics, for which mandatory or desirable is the dissipation of static charge and which addressed the above-mentioned disadvantages.

Another object of the invention is the creation of the scattering static charge yarns for use in the structure of power cables, such as used in oil wells, high-voltage transmission lines, as grounding means during production of the cable to prevent the formation of electric charge, the discharge of which may result in equipment damage, serious injury and/or someone's death.

Another object of the invention is the creation of the scattering static charge yarns for use in the structure of tubular braids, containing various thermoplastic monofilament, for protection, grounding and shielding is t electromagnetic interference beams of the multi-purpose cables, laid in the cells between structural elements in aerospace applications, for example for aircraft controls, lighting, and entertainment tasks, and automotive.

Another object of the invention is the creation of threads that dissipates static charge, for use in knitted and/or textile fabrics for cleaning.

The present invention solves these and other problems and provides these and other benefits. In this regard, the present invention relates to wear-resistant, having high conductivity polymer monofilament or wear-resistant, having high conductivity polymer woven monovacancy yarns used or used in a woven structure. The preferred embodiment of the invention includes the use of functional monofilaments or twisted monofilaments having a coating or film of conductive material containing metal particles and binder. In one embodiment, the implementation Monovolume contains at least one longitudinal groove, in which essentially is specified coating or is this film. When worn threads or monofilaments of a conductive material remains in the groove and protected from wear. As a result, tissue properties have the AMI for the dissipation of static charge, they previously had only fabric on a metal basis, and on physical and thermal properties are comparable to traditional industrial fabrics. Thus, the proposed woven structure is stable against the formation of dents and bends like fabric on a metal basis, but it provides a good dissipation of static charge. The quality of the dissipation of static charge, however, depends on the thickness of the coating, the level of conductivity of the material used for coating, the coverage area of the structure (surface, internal, etc.), gaps monovacancy grille and some other factors that were taken into consideration in the present invention.

BRIEF DESCRIPTION of DRAWINGS

For a better understanding of the objectives and advantages of the present invention, its description should be read in conjunction with the attached drawings, on which:

figure 1 is a view in cross section of the monofilament according to the present invention;

figure 2 is a top view of the fabric according to one aspect of the invention;

figa - section of the monofilament according to one aspect of the present invention;

fig.3b - section of the monofilament according to another aspect of the present invention;

figure 4 - diagram of a method of coating using heads for coating.

The IMPLEMENTATION of the INVENTION

PR is pactically an embodiment of the present invention is described in the context of technical fabrics, such as fabrics used in the manufacture of non-woven textile aerodynamic method, the aerodynamic method from the melt and/or spunbond method from the melt, and the release of non-woven products formed on the fabric, is improved by eliminating the formation of static charge. However, it should be noted that the invention can be applied to other industrial fabrics such as clothes fabrics used in paper production, and other fabrics used in any "dry" areas that require the dissipation of static electricity, for example, woven through the environment. In addition, since the conductive material is a good conductor of heat, the present invention can be applied where the quality of thermal conductivity. For example, the proposed conductive or dissipative static electricity threads can be used in the structure of power cables, such as used in oil wells, high-voltage transmission lines, as a grounding means, during production of the cable to prevent the formation of electric charge, the discharge of which may result in equipment damage, serious injury and/or someone's death. Another example is the use of the structure is re tubular braids, containing various thermoplastic monofilament, for protection, grounding and shielding from electromagnetic interference beams of the multi-purpose cables laid between structural elements for use in the aerospace industry, for example for aircraft controls, lighting, and provision of entertainment, and in the automotive industry. We also offer the scattering static thread can be used in knitted and/or textile fabrics used for cleaning. Woven structures can contain textile fabrics, arrays of yarns oriented in the machine direction or transverse to the movement of the fabric in the machine, knitted fabric, kits spiral links, film structures or patterns like film, extruded cells and spirally twisted strip of material of the above patterns. It should be noted that these industrial fabrics are relatively large and are often under the influence of very aggressive environments. These tissues may contain a synthetic fiber-based monofilament, woven monofilament, integrated fiber or twisted complex fiber, and can be single-layered or multi-layered, mnogosloinymi or layered.

As shown in figure 1, the present invention offers a TC is neither, containing functional Monovolume or functional thread 10 (section), which is or which contains electrically conductive material 12. Because the conductive material may not be durable enough for the formation of monofilaments 10, capable of withstanding the load, in a preferred implementation of the present invention, the material 12 is essentially in the grooves 14, passing along the monofilament 10. Tissue containing monofilament 10, preferably have the properties of the dissipation of static charge, which previously had only fabric on a metal basis, and on the physical properties of the processing equivalent to the traditional industrial fabrics. In addition, tissue monofilaments 10 resistant to the formation of dents and bends as known fabric with metallic fibers.

In particular, in the present invention the conductive material 12 is in a binder substance. The material used is preferably a conductive paste or a conductive adhesive, for example, from the company Engineered Conductive Materials, LLC or Engineered Material Systems, Inc., 132 Johnson Drive Delaware, Ohio 43015. This company offers a wide range of such pastes and glues. The most effective paste containing silver particles and a binder, preferably C1-1020. For this purpose, can also be other suitable navigating the e pasta with other metals, such as copper, Nickel, zinc, or their combinations. The binder can serve as epoxy resin, acrylic resin, vinylidenechloride, copolymers of these substances, or any other binder, suitable for this purpose.

Material 12 passes along the grooves 14 and do not have to fill them completely. However, in order to be effective, the material 12 should be continuous in the longitudinal direction of the grooves 14. On figa shown were obtained with a scanning electron microscope image of the preferred embodiments in which the material 12 deposited on Monovolume 10 in the form of a coating or film. Technologies include, for example, coating by immersion or dipping, spraying, injection, or other means suitable for this purpose. For example, it may be used is shown in figure 4, the method of coating using heads for coating, in which the material 12 and the binder metered serves to create a film on the surface of the monofilament, in particular in the area of the groove, and the inner perimeter of the head for coating approximately corresponds to the outer perimeter of the monofilament. In figure 4, in particular, shows an example of a device for applying a conductive coating, in which Monovolume without dormancy is itia, from the supply reel 18 passes through the cylinder 16 for coating, the monofilament at the same time put a layer of material 12 supplied from a tank 22 for applying a conductive coating. The dosage of the coating is controlled by the size of the head 16, and the coating on the monofilament 10 is then dried in a protective environment 24 with controlled heating, placed in a drying chamber, using a blower 26 hot air. After that Monovolume 10 is wound on the output container (not shown). Although preferred are essentially round monofilament with grooves, there may be other shape, such as planar (e.g., rectangular), polygonal or other non-circular shape. However, they are preferred molded monofilament at least one groove to accommodate a cover.

In the case of monofilaments with grooves conductive material with the binder uniformly covers the grooves 14, forming in the groove 14 of the continuous channel conductive coating or conductive film. Can be used at least one groove, in figure 1 the example shows three grooves.

It should be noted that for the application of the dye head size is the size of the monofilament. This reduces the weight of cover and costs due to the decrease of the expenditure required m the material. The groove 14 when this protects the material 12, as the latter is below the surface of the wear monofilament, which can cause abrasion. In other cases, the coating may be located on the outer surface.

Thus, by applying a conductive coating is firmly attached by means of a binder, durable against bending, thin, cheap and secure, get Monovolume, conductivity, equivalent conductivity of the metal thread. This monofilament can be used as is or may be subject to tradenew or torsion for forming twisted monovacancy structure in accordance with the desired end use. Figure 2 shows the fabric 20 according to one implementation variant of the invention, which contains Monovolume 10 passing in the direction transversely of the movement of the fabric in the machine.

It should be noted that these monofilament does not necessarily have to contain all the threads of the fabric, which may contain proposed monofilament forming the fabric, only partially. They can be used in the machine direction and/or perpendicular movement of the fabric in the machine and in any weaving pattern if necessary dissipation of static electricity in a specific version of application.

On fig.3b dormancy is the result obtained with a scanning electron microscope image of another version of the invention in relation to the coverage of the grooved monofilament 10 conductive material 12. The advantage of this variant implementation is the increased conductivity of the monofilament while maintaining its physical and functional properties. The material 12 is attached to the surface of the monofilament on its perimeter, and within the perimeter of the at least one groove. This arrangement of the thread groove serves to protect the conductive material 12 even when the wear of the monofilament 10, and shields and protects the conductive material 12. Specified preventing the placement of conductive material 12 provides a reduction in loss of conductivity over time, if the coating has less endurance than Monovolume 10.

It should be noted that Monovolume can be made from any suitable material, including polymers, such as polyester, polyamide or other materials known in the art. It should also be noted that the proposed conductive material has a conductivity that is close or equivalent to the conductivity of the metal fiber may be subjected to repeated bending maintain the required conductivity (ability to dissipate static charge) and is very well bonded to polymers, such as polyester, nylon, polyster, peek, etc.

Thus, in the present invention are realized his ass and and benefits although in detail here disclosed and described preferred options for its implementation, the scope and essence of the invention is not limited and defined by the attached claims.

1. Tissue scattering static charge containing polymer monofilament containing a conductive material containing metal particles and a binder, attached as continuous in the longitudinal direction cover these monofilaments or continuous in the longitudinal direction marked on them film, and these monofilament possess the properties of dissipation of static charge.

2. The fabric according to claim 1, in which the monofilament contain one or more longitudinal groove, in which the conductive material and binder is placed in the form of a continuous coating or a continuous film.

3. The fabric according to claim 1, in which the binder is an epoxy resin, acrylic resin, vinylidenechloride or copolymer.

4. The fabric according to claim 1, in which the metal particles are silver, copper, Nickel, zinc, or combinations of these substances.

5. The fabric according to claim 1, in which the monofilament are round or not round shape.

6. The fabric according to claim 1, in which the conductive material and the binder applied one of the following ways: immersion or dipping, spraying, priscu the tion or with heads for coating.

7. The fabric according to claim 1, which is a textile fabric, an array of filaments oriented in the machine direction or transverse to the movement of the fabric in the machine, knitted fabric, complete with spiral links, extruded cell or twisted strips of the above structures.

8. The fabric according to claim 1, in which the monofilament is made of polyester, nylon, polyster or peek.

9. The fabric according to claim 1, which is a technical fabric used in the manufacture of non-woven textile aerodynamic method, the aerodynamic method from the melt or spunbond method from the melt, or fabric for paper production.

10. The fabric according to claim 1, which is single - or multilayer, mnogosloinaya or layered.

11. Polymer monofilament having applied thereto in the longitudinal direction of a continuous coating or applied thereto in the longitudinal direction of the continuous film of conductive material containing metal particles and a binder and having the properties of dissipation of static charge.

12. The monofilament according to claim 11, containing one or more longitudinal groove, in which the conductive material and binder is placed in the form of a continuous coating or a continuous film.

13. The monofilament according to claim 11, in which the binder is predstavljaet an epoxy resin, acrylic resin, vinylidenechloride or copolymer.

14. The monofilament according to claim 11, in which the metal particles are silver, copper, Nickel, zinc, or combinations of these substances.

15. The monofilament according to claim 11, in which the conductive material and the binder applied one of the following ways: immersion or dipping, spraying, injection, or by using the head for coating.

16. The monofilament according to claim 11, which has a round or non-round shape.

17. The monofilament according to claim 11, which is made of polyester, nylon, polyster or peek.

18. The monofilament according to claim 11, used in the manufacture of technical fabrics used in the manufacture of non-woven textile aerodynamic method, the aerodynamic method from the melt or spunbond method from the melt, or tissue for paper production.

19. The monofilament according to claim 11, in respect of which the said fabric is a single or multilayer, mnogosloinaya or layered.

20. Technical fabric that contains:
polymer monofilament, which contain a conductive material and a binder,
moreover, the specified conductive material is applied in the form of a continuous in the longitudinal direction of the coating containing the metal particles having the properties rasayani the static charge.

21. The monofilament according to claim 11, used in the manufacture of power cables, cables, oil wells, high-voltage power lines, grounding means, tubular braids, screens against electromagnetic interference, cameras between structural elements in aerospace engineering, automotive engineering or knitted, or-textile fabrics for cleaning.



 

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