CA2154534C - Antitrauma packet - Google Patents
Antitrauma packet Download PDFInfo
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- CA2154534C CA2154534C CA 2154534 CA2154534A CA2154534C CA 2154534 C CA2154534 C CA 2154534C CA 2154534 CA2154534 CA 2154534 CA 2154534 A CA2154534 A CA 2154534A CA 2154534 C CA2154534 C CA 2154534C
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- Prior art keywords
- fibers
- packet
- antitrauma
- matrix
- aramid fibers
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
- F41H5/04—Plate construction composed of more than one layer
- F41H5/0471—Layered armour containing fibre- or fabric-reinforced layers
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
Abstract
An antitrauma packet for supplementing that resistance to mechanical impact and to ballistic penetration of structures that are made of at least one panel of polymeric fibers. At least one layer, having a matrix of polymeric fibers with a plurality of hollow microspheres scattered therein, is attached to the at least one panel.
Description
.
ANTITRAUMA P~-'~T
Backqround of th~ TnveDtion 1. Field Qf ~e ; nven~ion The present invention relates to a material or 5 strueture that resists ballistic penetration and meehanieal impaet forees. More speeifieally, the present invention relates to a material that is comprised of a matri~ of polymerie fibers in whieh a plurality of microspheres are spread throughout.
10 2. Des~ril?tion of the Rela~ed l~r~.
The invention of linear polyamides (e.g., nylon, nylon 6, etc ~, has lead to further research ~or new synthetic textile fibers, polyester fibers, polyurethane f ibers, etc . This research leads to the invention of a type 15 of fibers which have high heat resistance and high resistance to mechanical strain. These new fibers are classified under the generic name of "para amide ~ibers~
(or simply aramid ~ibers), and include the KEVLARR, NOMEXR
and TWARONR, three important mem.~bers of this group.
Aramid polymers are a product of the reaction of -the amino groups o~ a p~ m;nnhpn7ene compound and the acid groups o~ a terephtalic acid compound (The f irst example of a para amide polymer in this series was obtained from the polymerization of p-aminobenzoic aeid, coded PPD-T) .
In view of its superior mechanical and dynamic properties, its reduced expansion and thermal conductivity, its exeellent abrasion resistance, heat resistance and chemical inertia, the aramid fibers and in partieular, KEVLARR and TWARONR have been used in a great number o~
applieations in the manufacture of ropes, laminated tissues, etc. Aramid fibers are also used in the field of ballistic protection, both as soft body armors and heavy, high coverage armors, instead of body armors and bullet-resistant vests that are made of, for example, polyesters 5 f ibers or nylon f ibers .
The application of polymeric fiber materials in ballistic protection replaced other integrated structures with denser materials such as glass fibers or aluminum fibers. The ballistic resistance of polymeric fibers is 10 greater than that of glass or aluminium fibers. It is believed that ballistic resistance of fibers in general is due to the f act that, as a conse~uence of the impact and the penetration of the bullets, the yarns are stretched and thus absorb the energy of the projectile and dissipate that 15 energy laterally (through the fibrous yarns which surround the impact zone) and also di6sipate that energy longitudinally in the direction of the proj ectile . Aramids, the same as their predecessors, aliphatic polyamides and polyesters, are used under the form of flexible structures 20 (of woven fibers arranged in juxtaposed layers or of masses of felt-like (i.e unwoven) fibers having the thickness determined by the degree of exposure to projectiles) or rigid structures of laminate aramids for fragment and bullet-resistant garments and body armor panels. These 25 structures and pieces are applicable for both soft armors and heavy armors.
Materials used in ballistic protection should meet the regulations of standard norms which vary in each country. The standard norms establish the conditions to 30 measure the speed of pro~ectiles, and to measure penetration of the projectile into the material to determine the limit of the material. Ballistic resistance, for example, is the maximum velocity at which a fired bullet may be stopped and the bullet resistance corresponds 35 to a "Vso" value, which is defined a6 the velocity at which the penetration probability is 50~.
.
Another factor contemplated by the norms refers to the body protection and is important for the design and manufacture of personal body armors and garments. The body protection is the magnitude and the prof ile of t~e 5 deformation in the armor backing material or support of a bullet defense. This deformation, which for a certain defense, depends on the caliber, the weight, the velocity and the kind of bullet or fragment, may cause damage or ~~
bodily injuries, the severity of which also depends on the 10 point of impact, since part of the energy of each impact is felt and received: in the area of the body which is in line ---with the point of impact and results in traumas of a particularly severe nature when they correspond to the -hepatic region, the left iliac cavity, the spine, etc. The maximum deformation of the rear part of a ballistic defense -~~
after the impact is called "trauma", and is quantitatively expressed by lts depth (the length of the deformation in the direction of the impact).
In practice, the ballistic protection (soft or 20 rigid) is obtained by panels (also called packets) that are formed by a layer or a plurality of layers of fabrics made of woven or felt-like (i.e unwoven) aramid fibers, such as KEVI,AR 29R, KE~VLAR 49R, TWARON CT 930R, TWARON 1260R, etc.
~ach panel is covered by a hermetic, waterproof, flexible 25 cover or envelope having a predetermined thickness and design depending on the level of protection desired and the bullet parameters. Depending on each case, the flexible cover may be backstitched in order to increase the density of the fiber mass.
In laminated materials, the woven or unwoven aramid fibers are combined with polyester resins, phenolic resins, elastomers, and depending on each case, with carbon fibers or ceramic fibers to form a structure to be applied in heavy ballistic armors (e.g. helmets, defensive armors 3~ for vehicles, shelters or cabins, etc.) .~
Trauma may be controlled by modifying the thickness of the ballistic panels, the density of the fiber mass, the weave pattern of the fibers, etc. ~dditionally, trauma may be controlled by incorporating additional 5 laminates of antitrauma packets, aramid fillings or ceramic plates which cover the whole or a part of the front or the back of the ballistic panels.
SummarY o~ ~hP Iny~ntisn It is an object of the present invention to 10 increase the ballistic resistance, the bullet penetration and reduce the magnitude of the trauma of structures that are resistant to impact and/or to ballistic penetration It is a further obj ect of this invention to provide an antitrauma packet to supplement the resistance 15 of the mechanical impact and/or the ballistic penetration of structures formed by panels of woven, unwoven or laminated polymeric fibers. The packet comprises at least one layer or sheet which def ines a matrix of woven or unwoven polymeric fibers including a plurality of hollow 20 microspheres.
It is another object of this invention to provide an antitrauma packet to supplement the resistance to the mechanical impact and/or the ballistic penetration of structures formed by panels of woven or unwoven aramid 25 fibers. The packet comprising at least one layer or sheet which includes a matrix of woven or unwoven aramid fibers having a plurality of hollow microspheres which together def ine a polymeric covering .
It is yet another object of this invention to 30 provide a garment for body ballistic protection of the type which comprises a bullet-resistant panel formed by at least one plate or sheet of woven or unwoven aramid fibers. The panel acts as filling within a cover that is defined by a closed and waterproof covering and at least an additional panel formed by a plurality of sheets formed by a matrix of polymeric fibers, such as aramid fibers where a plurality of hollow microspheres are scattered therein.
It is yet another object of the present invention to provide an armor which comprises a reinforced structure resistant to the mechanical impact which comprises a plurality of layers of aramid fibers consolidated with synthetic resins, such as polyester resins or phenolic resins and as an additional antitrauma structure. At least one packet is defined by a closed and waterproof envelope having at least one of the layers or sheets of woven or unwoven fibers, for e~ample, aramid fibers, where hollow microspheres are scattered therein.
~rie~ Deqcri~tion of the Fiqure_ The above and still further objects, features and advantages of the present invention will become apparent upon consideration of the following detailed description of a specific embodiment thereof, especially when taken in conjuntion with the accompanying drawings wherein like reference numerals in the various figures are u~ilized to designate like components, and wherein:
Figure 1 shows an enlarged view of an antitrauma layer according to the ~resent invention.
Figure 2 shows a graph representative of the depth of the trauma in accordance with the data o~ Table 1.
DPt~ P~l Desçri~tion 9~ i~he PrPqPntl~ Pr~erred r ~ -~; tq The antitrauma packet of the present invention comprises a plurality of juxtaposed laminates or layers of a substrate or matrix of woven or unwoven f ibers, as a support for a plurality of hollow microspheres that are randomly scattered in the matrix.
These kinds of support materials per sé are well known in art. These support materials have been used in the manufacture of laminates, or as low weight reinforcing 5 material, to replace other known reinforcing materials, such as liners or blankets made of reticulate woven polyester fibers, glass fibers or aramid fibers, etc., all of which have a heavier weight.
The present invention pref erably uses the 10 commercially available product known as CORE~TR 3~[owever, it should be understood that the present invention should not be limited to this product and the fiber/microsphere component can comprise virtually any fiber product 80 long as hollow microspheres are used as an additional component 15 for the antitrauma structures or materials.
COREr~T~ (a product of Lantor B .V. ) is in the form of blankets or laminates of unwoven polyester fibers and has a variable thickness and density. In the tests conducted and explained hereinbelow, blankets having a ~o thickness of 2 moa were used. These blankets were 60~6 by wei~ht of polyester fibers and 40~ by weight of hollow polymeric microspheres. The blankets had a density of approximately 40/g/m'/mm of thickness. The large number of microspheres used in ~orming the blankets plays a 25 fl~n~m,on~l role in obtaining such reduced density levels.
The packet of the present invention should be united with a number of laminates in accordance with the level of supplemental protection required, which, of cour6e, depends on the type of impact load that the 30 material is to withstand. For example, the impact load may be from the velocity of a bullet when it refers to ballistic defenses, or to the strength or the condition of a certain mechanical impact when it refers to defenses against purely mechanical aggressions or effects (bumper or fender structures) in the protection, for example, of critical parts or areas of civil or military vehicles.
The antitrauma packet of this invention has increased resistance to ballistic penetration and to 5 me~hAn;rAl impact. The material, which carries the microspheres, in accordance with this invention, is a reinforce~Lent of laminate materials, having a function similar to that of other reinforcement materials, but which is extremely lightweight.
In this invention, the fiber structure and the microspheres make up a material having unexpected superior antitrauma effects, as shown in the tests explained =.
hereinbelow .
The packet of this invention can be of the f orm 15 of units or panels with a ~9PtPrm; n.~l number of juxtaposed sheets included in a hermetic envelope or cover The packet may be coupled with convPn~;nnAl protection structures formed by panels made of aramid fibers. Another possible alternative is to associate the packet of the present 20 invention at the back of any of the known structures that are resistant to ballistic penetration and/or mechanical impact (such as KEVI,AR~ or TWARONR sheets or felts) . ~or the purposes of this invention, the matrix on which the microspheres are scattered does not depend on a particular 25 kind of f ibers or microspheres . The known material, the COREM~T~ (polyester fibers and hollow polystyrene microspheres) has been spe~ ;f;~ y mentioned herein and it is considered that other woven or unwoven structures, such as nylon, I~EVLAR or TWARON and compounds thereof, are 30 useful for the purpose of this invention and should be considered within the scope thereof.
The microspheres distributed in the matrix are hollow particles preferably with a 1 to 100 micron average diameter The values of the microsphere diameters are 2 t 54534 indicated for illustrative purposes only. The microspheres should preferably be hollow particles which are not so small as to behave as a powder material nor so big as to be virtual bores in the matrix. The embedding of microspheres in a resin material is known from U.S. Patent No. 4.543.106 to Parekti, which is hereby incorporated by reference.
Fig. 1 shows a plurality of orifices or through holes in a COREMAT product that have been produced by a bullet The f ibers are shown in the background of the drawing. A garment may be made in accordance with the present invention by packing layers of E~EVLAR, or other suitable fibrous material along with a layer of fiber/microsphere component that have been attached to each other, for example by sewing or VELCROR, etc, within an envelope that is preferable waterproof.
Balli~ti~ T~t~ -Comparative tests (i.e. without the antitrauma panel) of ballistic penetration and depth of the trauma were conducted by firing bullets of different caliber on a 20 target formed by a 40cm x 40cm panel made of monofilament and microfilament KEVLAR or TWARON fibers, compacted in a polyester backstitched covering having sealed edges.
The following Table shows the information corresponding to one of these tests:
Table I
Surface pPnPtr~t;on of thP Bllllet ;n~n thP p~nPl ;n .
mill~ mPt~'rS
Caliber Without the With the antitrauma panel antitrauma panel 30 9 mm 70 mm o . 3 5 7 Magnum 3 5 . 0 mm 3 mm .44 Magnum 43-44 mm 6 mm ,., .. . i g The antitrauma panel in accordance with the present invention, used in these tests was formed by lO
layers of 2 mm thick of COREMATP- formed by a non typical polyester matrix (60~6 of weight) and hollow microspheres ~-(4096 of weight), with a density of 40 g/m'/mm thickness Figure 2 shows the antitrauma effect which is verified by supplementing a conventional panel of Kevlar fibers with a package of 12 COREMATR laminates. The COREMATR
laminates and the Kevlar were included inside an envelope 10 made of oil cloth, i e. they were loose within a tight envelope thus forming a monolitic structure The envelope was sewed and the Kevlar and the Coremat laminate were held together Lnside it. The set of 12 COREMATR laminates weighs 40g. These laminates reduce the ballistic deformation of a 15 conventional backing for a 44 Magnum gun from 43 mm to 6 0 mm
ANTITRAUMA P~-'~T
Backqround of th~ TnveDtion 1. Field Qf ~e ; nven~ion The present invention relates to a material or 5 strueture that resists ballistic penetration and meehanieal impaet forees. More speeifieally, the present invention relates to a material that is comprised of a matri~ of polymerie fibers in whieh a plurality of microspheres are spread throughout.
10 2. Des~ril?tion of the Rela~ed l~r~.
The invention of linear polyamides (e.g., nylon, nylon 6, etc ~, has lead to further research ~or new synthetic textile fibers, polyester fibers, polyurethane f ibers, etc . This research leads to the invention of a type 15 of fibers which have high heat resistance and high resistance to mechanical strain. These new fibers are classified under the generic name of "para amide ~ibers~
(or simply aramid ~ibers), and include the KEVLARR, NOMEXR
and TWARONR, three important mem.~bers of this group.
Aramid polymers are a product of the reaction of -the amino groups o~ a p~ m;nnhpn7ene compound and the acid groups o~ a terephtalic acid compound (The f irst example of a para amide polymer in this series was obtained from the polymerization of p-aminobenzoic aeid, coded PPD-T) .
In view of its superior mechanical and dynamic properties, its reduced expansion and thermal conductivity, its exeellent abrasion resistance, heat resistance and chemical inertia, the aramid fibers and in partieular, KEVLARR and TWARONR have been used in a great number o~
applieations in the manufacture of ropes, laminated tissues, etc. Aramid fibers are also used in the field of ballistic protection, both as soft body armors and heavy, high coverage armors, instead of body armors and bullet-resistant vests that are made of, for example, polyesters 5 f ibers or nylon f ibers .
The application of polymeric fiber materials in ballistic protection replaced other integrated structures with denser materials such as glass fibers or aluminum fibers. The ballistic resistance of polymeric fibers is 10 greater than that of glass or aluminium fibers. It is believed that ballistic resistance of fibers in general is due to the f act that, as a conse~uence of the impact and the penetration of the bullets, the yarns are stretched and thus absorb the energy of the projectile and dissipate that 15 energy laterally (through the fibrous yarns which surround the impact zone) and also di6sipate that energy longitudinally in the direction of the proj ectile . Aramids, the same as their predecessors, aliphatic polyamides and polyesters, are used under the form of flexible structures 20 (of woven fibers arranged in juxtaposed layers or of masses of felt-like (i.e unwoven) fibers having the thickness determined by the degree of exposure to projectiles) or rigid structures of laminate aramids for fragment and bullet-resistant garments and body armor panels. These 25 structures and pieces are applicable for both soft armors and heavy armors.
Materials used in ballistic protection should meet the regulations of standard norms which vary in each country. The standard norms establish the conditions to 30 measure the speed of pro~ectiles, and to measure penetration of the projectile into the material to determine the limit of the material. Ballistic resistance, for example, is the maximum velocity at which a fired bullet may be stopped and the bullet resistance corresponds 35 to a "Vso" value, which is defined a6 the velocity at which the penetration probability is 50~.
.
Another factor contemplated by the norms refers to the body protection and is important for the design and manufacture of personal body armors and garments. The body protection is the magnitude and the prof ile of t~e 5 deformation in the armor backing material or support of a bullet defense. This deformation, which for a certain defense, depends on the caliber, the weight, the velocity and the kind of bullet or fragment, may cause damage or ~~
bodily injuries, the severity of which also depends on the 10 point of impact, since part of the energy of each impact is felt and received: in the area of the body which is in line ---with the point of impact and results in traumas of a particularly severe nature when they correspond to the -hepatic region, the left iliac cavity, the spine, etc. The maximum deformation of the rear part of a ballistic defense -~~
after the impact is called "trauma", and is quantitatively expressed by lts depth (the length of the deformation in the direction of the impact).
In practice, the ballistic protection (soft or 20 rigid) is obtained by panels (also called packets) that are formed by a layer or a plurality of layers of fabrics made of woven or felt-like (i.e unwoven) aramid fibers, such as KEVI,AR 29R, KE~VLAR 49R, TWARON CT 930R, TWARON 1260R, etc.
~ach panel is covered by a hermetic, waterproof, flexible 25 cover or envelope having a predetermined thickness and design depending on the level of protection desired and the bullet parameters. Depending on each case, the flexible cover may be backstitched in order to increase the density of the fiber mass.
In laminated materials, the woven or unwoven aramid fibers are combined with polyester resins, phenolic resins, elastomers, and depending on each case, with carbon fibers or ceramic fibers to form a structure to be applied in heavy ballistic armors (e.g. helmets, defensive armors 3~ for vehicles, shelters or cabins, etc.) .~
Trauma may be controlled by modifying the thickness of the ballistic panels, the density of the fiber mass, the weave pattern of the fibers, etc. ~dditionally, trauma may be controlled by incorporating additional 5 laminates of antitrauma packets, aramid fillings or ceramic plates which cover the whole or a part of the front or the back of the ballistic panels.
SummarY o~ ~hP Iny~ntisn It is an object of the present invention to 10 increase the ballistic resistance, the bullet penetration and reduce the magnitude of the trauma of structures that are resistant to impact and/or to ballistic penetration It is a further obj ect of this invention to provide an antitrauma packet to supplement the resistance 15 of the mechanical impact and/or the ballistic penetration of structures formed by panels of woven, unwoven or laminated polymeric fibers. The packet comprises at least one layer or sheet which def ines a matrix of woven or unwoven polymeric fibers including a plurality of hollow 20 microspheres.
It is another object of this invention to provide an antitrauma packet to supplement the resistance to the mechanical impact and/or the ballistic penetration of structures formed by panels of woven or unwoven aramid 25 fibers. The packet comprising at least one layer or sheet which includes a matrix of woven or unwoven aramid fibers having a plurality of hollow microspheres which together def ine a polymeric covering .
It is yet another object of this invention to 30 provide a garment for body ballistic protection of the type which comprises a bullet-resistant panel formed by at least one plate or sheet of woven or unwoven aramid fibers. The panel acts as filling within a cover that is defined by a closed and waterproof covering and at least an additional panel formed by a plurality of sheets formed by a matrix of polymeric fibers, such as aramid fibers where a plurality of hollow microspheres are scattered therein.
It is yet another object of the present invention to provide an armor which comprises a reinforced structure resistant to the mechanical impact which comprises a plurality of layers of aramid fibers consolidated with synthetic resins, such as polyester resins or phenolic resins and as an additional antitrauma structure. At least one packet is defined by a closed and waterproof envelope having at least one of the layers or sheets of woven or unwoven fibers, for e~ample, aramid fibers, where hollow microspheres are scattered therein.
~rie~ Deqcri~tion of the Fiqure_ The above and still further objects, features and advantages of the present invention will become apparent upon consideration of the following detailed description of a specific embodiment thereof, especially when taken in conjuntion with the accompanying drawings wherein like reference numerals in the various figures are u~ilized to designate like components, and wherein:
Figure 1 shows an enlarged view of an antitrauma layer according to the ~resent invention.
Figure 2 shows a graph representative of the depth of the trauma in accordance with the data o~ Table 1.
DPt~ P~l Desçri~tion 9~ i~he PrPqPntl~ Pr~erred r ~ -~; tq The antitrauma packet of the present invention comprises a plurality of juxtaposed laminates or layers of a substrate or matrix of woven or unwoven f ibers, as a support for a plurality of hollow microspheres that are randomly scattered in the matrix.
These kinds of support materials per sé are well known in art. These support materials have been used in the manufacture of laminates, or as low weight reinforcing 5 material, to replace other known reinforcing materials, such as liners or blankets made of reticulate woven polyester fibers, glass fibers or aramid fibers, etc., all of which have a heavier weight.
The present invention pref erably uses the 10 commercially available product known as CORE~TR 3~[owever, it should be understood that the present invention should not be limited to this product and the fiber/microsphere component can comprise virtually any fiber product 80 long as hollow microspheres are used as an additional component 15 for the antitrauma structures or materials.
COREr~T~ (a product of Lantor B .V. ) is in the form of blankets or laminates of unwoven polyester fibers and has a variable thickness and density. In the tests conducted and explained hereinbelow, blankets having a ~o thickness of 2 moa were used. These blankets were 60~6 by wei~ht of polyester fibers and 40~ by weight of hollow polymeric microspheres. The blankets had a density of approximately 40/g/m'/mm of thickness. The large number of microspheres used in ~orming the blankets plays a 25 fl~n~m,on~l role in obtaining such reduced density levels.
The packet of the present invention should be united with a number of laminates in accordance with the level of supplemental protection required, which, of cour6e, depends on the type of impact load that the 30 material is to withstand. For example, the impact load may be from the velocity of a bullet when it refers to ballistic defenses, or to the strength or the condition of a certain mechanical impact when it refers to defenses against purely mechanical aggressions or effects (bumper or fender structures) in the protection, for example, of critical parts or areas of civil or military vehicles.
The antitrauma packet of this invention has increased resistance to ballistic penetration and to 5 me~hAn;rAl impact. The material, which carries the microspheres, in accordance with this invention, is a reinforce~Lent of laminate materials, having a function similar to that of other reinforcement materials, but which is extremely lightweight.
In this invention, the fiber structure and the microspheres make up a material having unexpected superior antitrauma effects, as shown in the tests explained =.
hereinbelow .
The packet of this invention can be of the f orm 15 of units or panels with a ~9PtPrm; n.~l number of juxtaposed sheets included in a hermetic envelope or cover The packet may be coupled with convPn~;nnAl protection structures formed by panels made of aramid fibers. Another possible alternative is to associate the packet of the present 20 invention at the back of any of the known structures that are resistant to ballistic penetration and/or mechanical impact (such as KEVI,AR~ or TWARONR sheets or felts) . ~or the purposes of this invention, the matrix on which the microspheres are scattered does not depend on a particular 25 kind of f ibers or microspheres . The known material, the COREM~T~ (polyester fibers and hollow polystyrene microspheres) has been spe~ ;f;~ y mentioned herein and it is considered that other woven or unwoven structures, such as nylon, I~EVLAR or TWARON and compounds thereof, are 30 useful for the purpose of this invention and should be considered within the scope thereof.
The microspheres distributed in the matrix are hollow particles preferably with a 1 to 100 micron average diameter The values of the microsphere diameters are 2 t 54534 indicated for illustrative purposes only. The microspheres should preferably be hollow particles which are not so small as to behave as a powder material nor so big as to be virtual bores in the matrix. The embedding of microspheres in a resin material is known from U.S. Patent No. 4.543.106 to Parekti, which is hereby incorporated by reference.
Fig. 1 shows a plurality of orifices or through holes in a COREMAT product that have been produced by a bullet The f ibers are shown in the background of the drawing. A garment may be made in accordance with the present invention by packing layers of E~EVLAR, or other suitable fibrous material along with a layer of fiber/microsphere component that have been attached to each other, for example by sewing or VELCROR, etc, within an envelope that is preferable waterproof.
Balli~ti~ T~t~ -Comparative tests (i.e. without the antitrauma panel) of ballistic penetration and depth of the trauma were conducted by firing bullets of different caliber on a 20 target formed by a 40cm x 40cm panel made of monofilament and microfilament KEVLAR or TWARON fibers, compacted in a polyester backstitched covering having sealed edges.
The following Table shows the information corresponding to one of these tests:
Table I
Surface pPnPtr~t;on of thP Bllllet ;n~n thP p~nPl ;n .
mill~ mPt~'rS
Caliber Without the With the antitrauma panel antitrauma panel 30 9 mm 70 mm o . 3 5 7 Magnum 3 5 . 0 mm 3 mm .44 Magnum 43-44 mm 6 mm ,., .. . i g The antitrauma panel in accordance with the present invention, used in these tests was formed by lO
layers of 2 mm thick of COREMATP- formed by a non typical polyester matrix (60~6 of weight) and hollow microspheres ~-(4096 of weight), with a density of 40 g/m'/mm thickness Figure 2 shows the antitrauma effect which is verified by supplementing a conventional panel of Kevlar fibers with a package of 12 COREMATR laminates. The COREMATR
laminates and the Kevlar were included inside an envelope 10 made of oil cloth, i e. they were loose within a tight envelope thus forming a monolitic structure The envelope was sewed and the Kevlar and the Coremat laminate were held together Lnside it. The set of 12 COREMATR laminates weighs 40g. These laminates reduce the ballistic deformation of a 15 conventional backing for a 44 Magnum gun from 43 mm to 6 0 mm
Claims (16)
1. An antitrauma packet for supplementing the resistance to mechanical impact and to ballistic penetration of structures comprising:
at least one panel comprising aramid fibers; and at least one layer having a matrix of polymeric fibers with a plurality of hollow microspheres scattered therein, being attached to said at least one panel.
at least one panel comprising aramid fibers; and at least one layer having a matrix of polymeric fibers with a plurality of hollow microspheres scattered therein, being attached to said at least one panel.
2. Antitrauma packet for supplementing the resistance to mechanical impact and ballistic penetration of structures comprising:
at least one panel of aramid fibers; and at least one layer having a matrix of aramid fibers with a plurality of hollow microspheres defined by a polymeric cover scattered therein, said at least one layer being attached to said at least one panel.
at least one panel of aramid fibers; and at least one layer having a matrix of aramid fibers with a plurality of hollow microspheres defined by a polymeric cover scattered therein, said at least one layer being attached to said at least one panel.
3. An antitrauma packet according to claim 1 wherein said matrix is comprised of fibers selected from the group consisting of polyester, nylon or aramid fibers and mixtures thereof.
4. An antitrauma packet according to claim 2, wherein said matrix is comprised of fibers selected from the group consisting of polyester, nylon or aramid fibers and mixtures thereof.
5. An antitrauma packet in accordance with claim 3, wherein said fibers, comprise a polymer comprising p-diaminobenzene and terephtalic acid.
6. An antitrauma packet in accordance with claim 4, wherein said fibers comprise a polymer comprising p-diaminobenzene and therephtalic acid.
7. An antitrauma packet in accordance with claim 3, wherein said packet comprises a plurality of laminates, each of said laminates comprises a felt of the group consisting of polyester fibers, aramid fibers or mixtures thereof which form said matrix.
8. An antitrauma packet in accordance with claim 4, wherein said packet comprises a plurality of laminates, each of said laminates comprises a felt of the group consisting of polyester fibers, aramid fibers or mixtures thereof which form said matrix.
9. An antitrauma packet in accordance with claim 7, wherein each laminate comprises about 40% by weight of microspheres.
10. An antitrauma packet in accordance with claim 7 wherein each laminate comprises about 40% by weight of microspheres.
11. A laminated structure for personal resistance to ballistic penetration comprising:
a bullet-resistant panel formed by at least one sheet of aramid fibers, said sheet being a filling of an envelope that is defined by a closed and waterproof cover;
and at least one additional panel formed by a plurality of sheets that are formed by a matrix of polymeric fibers, said polymeric fibers being aramid fibers having a plurality of hollow microspheres spread therein.
a bullet-resistant panel formed by at least one sheet of aramid fibers, said sheet being a filling of an envelope that is defined by a closed and waterproof cover;
and at least one additional panel formed by a plurality of sheets that are formed by a matrix of polymeric fibers, said polymeric fibers being aramid fibers having a plurality of hollow microspheres spread therein.
12. A reinforced structure comprising:
a plurality of layers of aramid fibers that are consolidated with synthetic resins, said resins being selected from the group consisting of polyester resins or phenolic resins; at least one packet being defined by a closed and waterproof envelope having at least one of the layers of aramid fibers having a plurality of hollow microspheres scattered therein.
a plurality of layers of aramid fibers that are consolidated with synthetic resins, said resins being selected from the group consisting of polyester resins or phenolic resins; at least one packet being defined by a closed and waterproof envelope having at least one of the layers of aramid fibers having a plurality of hollow microspheres scattered therein.
13. A structure according to claim 11, wherein said matrix is selected from the group consisting of polyester fibers, nylon fibers or aramid fibers and mixtures thereof.
14. A structure according to claim 12, wherein said matrix is selected from the group consisting of polyester fibers, nylon fibers or aramid fibers and mixtures thereof.
15. A structure according to claim 11, wherein said matrix comprises about 40% by weight of microspheres.
16. A structure according to claim 12, wherein said matrix comprises about 40% by weight of microspheres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2154534 CA2154534C (en) | 1995-07-24 | 1995-07-24 | Antitrauma packet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2154534 CA2154534C (en) | 1995-07-24 | 1995-07-24 | Antitrauma packet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2154534A1 CA2154534A1 (en) | 1997-01-25 |
| CA2154534C true CA2154534C (en) | 2000-06-20 |
Family
ID=4156284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2154534 Expired - Fee Related CA2154534C (en) | 1995-07-24 | 1995-07-24 | Antitrauma packet |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2154534C (en) |
-
1995
- 1995-07-24 CA CA 2154534 patent/CA2154534C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2154534A1 (en) | 1997-01-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |