MXPA99005933A - Multilaminar structure for conforming flexible components highly resistant to impacts and dynamic strain - Google Patents

Abstract

A special structure (1) of the type formed by a plurality of sheets (2,3,4,5,6,7,8,9) weaved with threads of natural or artificial fibers, the threads (11,12,13,14,15) are arranged one on top of the other, joined by adhesives or stitching. The novelty is that each sheet is arranged offset at an angle (biased) from adjacent sheets by means of a turn in the same vertical axis. Thus, the web weaves of each sheet (biased) are arranged in different directions, increasing the resistance to impacts and dynamic strains, with less weight, less number of sheets and higher flexibility and resistance to breakage.

Description

MULTILAMINAR STRUCTURE FOR THE FORMULATION OF FLEXIBLE PARTS THAT ARE EXTREMELY RESISTANT TO IMPACTS AND DYNAMIC EFFORTS.

The main object of the present invention patent is a MULTILAYER STRUCTURE FOR THE FORMULATION OF FLEXIBLE PARTS SUMMARY RESISTANT TO IMPACTS AND DYNAMIC EFFORTS, which can be applied for a variety of purposes, such as forming the internal lining of armor for special police transport vehicles or flow, internal lining of aircraft walls, or be part of the cover of various objects likely to be exposed to blows or impacts that may suffer deforming but without suffering any type of breakage, such as bulletproof vests for use of personnel of security forces, as well as many other purposes that are not mentioned because they are not the basis of this invention.

More specifically, the present patent of invention covers a special multilayered structure, constituted from the fabric of multifilament yarns created with extremely resistant artificial or natural fibers, such as those of aradmides, polyester, dyneema, nylon, carbon, titanium, or their equivalents.; today individually known and in the public domain. Being the novelty and creation that is covered by this document, the special way, in bias, in which the multiplicity of sheets that constitute each flexible structure overlap each other.

PREVIOUS ART Laminates are known which are constituted with natural or artificial fiber yarns of the type indicated, and which, superimposed on one another, form structures which are blocks of joined sheets, preferably with layers of intercalated adhesive. In this sense, the one that is identified and known with the trademark "TWARON", "KEBLAR" and "DYNEEMA", specially designed for the constitution of bulletproof protective garments and diverse industrial uses, is cited as background.

These are fabrics consisting of the fabric of mutilated yarn, artificial or natural fibers, which are superposed in the exposed conditions and are resistant to impacts, such as bullet wounds, yet sufficiently flexible and lightweight to allow the conformation of vests or other ballistic protection garments or against sharp elements, among other industrial purposes.

Invariably, these are quadrangular mesh fabrics, while the weft as the warp are defined with said artificial or natural fiber threads, and it has been proven that they are effective because the aforementioned bullet impacts do not go through the entire cloth, given the resistance of said yarns; being able to appreciate that the projectiles remain inserted in the body of the same producing their deformation, causing a considerable trauma.

It is especially clear that these results are achieved with the use of a plurality of loose sheets or sewn and / or glued together from a minimum amount depending on the type and degree of impacts to which it will be subjected.

In all these known cases, especially garments, especially designed for ballistic protection, bríndales of all kinds, (vests, helmets, shields and armor), the key is in the amount of microfilaments of each thread, which must have a proven resistance to traction, elongation and breaking strength.

Also the fabric is important to achieve the desired effects for example in a bulletproof vest. The cloth must be extremely resistant but flexible at the same time.

With the use and verification of the behavior of the vests and bulletproof garments thus constituted, it has been possible to verify that the majority of the impacts managed to cross a good amount of sheets of the superposition that makes up the cloth, however, not all of them show breakage of the yarn, but rather, the deformation of the weft constituting the mesh is visible, displacing the yarns without. cut them to the majority.

Obviously, the effect indicated in the previous paragraph is clear in the first half of the thickness of the body of the garment, not allowing the projectile to advance and exit in the second half of the thickness of the body of the garment.

From the indicated observation, the cloth referred to in the present patent of invention is born.

NOVELTY AND MAIN OBJECT Indeed, own experiments have verified that a good amount of sheets passed through the projectile did not cut most of the threads, but suffered a shift to the sides, that is, deformed the mesh without crossing the total of the sheets of fiber spinning, causing very large deformation due to impact (trauma).

This behavior was simple to check because all the superposed sheets that, as a whole, determine the body of the cloth have their quadrangular mesh in the same orientation. Saving small relative displacements between sheet and sheet, verifying that, invariably, the grid that defines each sheet is of the same format, with the same orientation as that of its adjacent ones.

The novelty that highlights the structure to which this invention patent refers consists in that the mesh of each sheet is displaced with respect to its adjacent ones, achieving a special biased arrangement of the sheets that make up the invented structure.

Said disposition in sešgo is obtained by means of an angular displacement with respect to a vertical axis of each sheet with respect to its adjacent ones.

Starting from the indicated constructive condition, what is obtained is that the structure's resistance to dynamic impacts or blows increases very considerably given that, when the aforementioned angular displacement of the sheets occurs, the mechanical resistance that opposes the each impact. In fact, in this case, in order for the projectile, or any equivalent dynamic force, to advance on the body of the cloth, it will be forced to cut the threads since, in the exposed manner, the disposition of them prevents any possibility of being displaced and / or deformed, considerably preventing the same from penetrating, causing less deformation, and reducing trauma from impact.

As a result of the above, it has been verified that with a decrease of between 30% and 50% of sheets required compared to the superimposed sheets with their quadrangular mesh in the same orientation, the same results were achieved if they were available in the manner indicated as novel in the previous paragraph.

Clear then arise a series of advantages that optimize the use of cloth invented against the others already known and public domain. With less weight, less sheet and greater capacity for flexibility, better results are obtained.

DESCRIPTION OF AN EXAMPLE OF REALIZATION To specify the advantages thus briefly commented, to which the users and those skilled in the art may add many others, and to facilitate the understanding of the constructive, constitutive and functional characteristics of the invented cloth, a preferred example of the following is described below: embodiment, which is illustrated, schematically and without a specific scale, in the attached sheet, with the express clarification that, precisely because it is an example, it is not appropriate to assign to it a limiting or exclusive nature of the scope of protection of this patent of invention, but simply attends a merely explanatory and illustrative intention of the basic conception on which it is based.

Figure No. 1 is a perspective view showing a section of flexible structure multilane constituted according to the present invention.

Figure No. 2 is a top plan view showing the arrangement of the overlapping sheets in a bias according to a constructive condition established in this invention.

Figure No. 3 is a detail diagram showing the arrangement of the yarns in the fabric, according to a top view in the case of three superimposed sheets.

It is clarified that, in all the figures, at the same reference numbers, correspond the same or equivalent parts or constituent elements of the set, according to the example chosen for the present explanation of the cloth invented.

As can be seen in Figure No. 1, the multilayered cloth to which the present patent of invention refers, is constituted by a plurality of superimposed sheets oriented in particular shape (in bias), its main advantage being that of offering large resistance to impacts and dynamic efforts.

Each sheet is of the type whose fabric is formed with spun fibers of artificial or very strong natural fibers such as those of aradmides, polyester, dyneema, nylon, carbon, titanium and the like, and are quadrangular mesh according to fabric lines that may be parallel to the sides of each sheet, as indicated by reference - 1 in Figure No. 1.

It treats of fabrics where the treats and the warp are, in general, perpendicular to each other. However, other types of fabrics should be understood as falling within the scope of this invention, for example, those in which the warp is not perpendicular to the weft, forming different angles.

It is a condition of the invention that each of said sheets is arranged angularly offset from its previous (biased), which is shown in Figure No. 2, with the references -2- to -9-.

What is obtained with this special arrangement is that the yarns of each sheet (arranged in bias) also overlap, generating a body very resistant to impacts and dynamic efforts. The detail of Figure No. 3 is intended to exemplify this behavior by showing the case of three overlapping sheets, where the yarns -10 and -11- of the first sheet, have different orientation to the -12- and -13- of the second sheet , as well as with respect to the -14- and -15- of the third sheet.

In the exposed manner, it is achieved that with lquantity of superimposed sheets (in bias), an effective behavior with lweight, greater flexibility and, above all, lower cost results when lmaterial is required.

Starting from the basic structure previously exemplified, there are some constructive options included within the scope that is claimed. Among them is the fact that all the sheets are adhered to each other by means of compatible intercalated adhesive substances.

It also includes the grouping of sheets to define independent blocks that overlap with others with the same characteristics and are linked by means of seam lines. These sewing lines can be of different sizes and proportions, defining square, rhomboidal, spiral or cross figures.

These packages, formed by superimposed sheets, may be arranged with an angular displacement with respect to their adjacent ones.

Preferably, the adhesive to be used is of the "hot melt" type because, in addition to acting on the adhesion between sheets or between packages, it provides greater resistance to the dynamic forces to which the cloth can be subjected. It is even contemplated that the already formed cloth can be externally coated with this type of adhesive.

Claims (10)

R E I V I N D I C A C I O N S Having described and illustrated the nature and main purpose of the present invention, as well as the manner in which it can be put into practice, it is claimed to claim ownership and exclusive rights.

1. MULTILILLARY STRUCTURE FOR FORMING FLEXIBLE PARTS SUMMARY RESISTANT TO IMPACTS AND DYNAMIC EFFORTS, of the type consisting of a plurality of overlapping and joined sheets; each sheet being formed by the fabric of microfilament yarns constituted with artificial or natural synthetic fibers such as aradmides, polyester, dyneema, nylon, carbon, titanium and the like, characterized in that each sheet is arranged angularly (biased) displaced from its adjacent ones by means of a turn with respect to the same vertical axis.

2. MULTILAYER STRUCTURE, as claimed in 1, characterized in that the sheets are joined together by means of adhesives (such as the "hot melt")

3. MULTILAMINAR STRUCTURE, as claimed in 1, characterized in that the grouped sheets (in bias) form bundles joined and superimposed by adhesive.

4. MULTILAMINAR STRUCTURE, as claimed in 1, characterized in that the grouped sheets (in bias) form blocks joined and superimposed by seam lines.

5. MULTILAMINAR STRUCTURE, as claimed in 1, characterized in that the plurality of sheets (biased) are joined together by means of solid adhesives (such as the "hot melt").

6. MULTILAMINAR STRUCTURE, as claimed in 1, characterized in that the plurality of sheets (biased) joined together, are covered by an outer layer of solid adhesive type "holt melt".

7. MULTILAMINAR STRUCTURE, as claimed in 1, characterized in that the plurality of sheets (biased) are glued by their side edges together, using a glue type "hot melt".

8. MULTILAMINAR STRUCTURE, as claimed in 1, characterized in that the sheets are quadrangular mesh fabrics.

9. MULTILAMINAR STRUCTURE, as claimed in 8, characterized in that the quadrangular mesh fabric has its warp oriented perpendicular to the weft.

10. MULTILAMIÑAR STRUCTURE, as claimed in 8, characterized in that the quadrangular mesh fabric has its warp oriented obliquely with respect to the weft.