CN115265278A - Combined bulletproof plate and preparation method thereof - Google Patents
Combined bulletproof plate and preparation method thereof Download PDFInfo
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- CN115265278A CN115265278A CN202211080763.2A CN202211080763A CN115265278A CN 115265278 A CN115265278 A CN 115265278A CN 202211080763 A CN202211080763 A CN 202211080763A CN 115265278 A CN115265278 A CN 115265278A
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- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000000835 fiber Substances 0.000 claims abstract description 113
- 239000004744 fabric Substances 0.000 claims abstract description 79
- 239000002131 composite material Substances 0.000 claims abstract description 52
- 239000004698 Polyethylene Substances 0.000 claims abstract description 44
- -1 polyethylene Polymers 0.000 claims abstract description 44
- 229920000573 polyethylene Polymers 0.000 claims abstract description 44
- 238000010008 shearing Methods 0.000 claims abstract description 15
- 239000010410 layer Substances 0.000 claims description 120
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 68
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 68
- 239000000463 material Substances 0.000 claims description 43
- 239000002356 single layer Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000003475 lamination Methods 0.000 claims description 10
- 238000007731 hot pressing Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 description 14
- 238000005452 bending Methods 0.000 description 6
- 238000013329 compounding Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
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- 238000004321 preservation Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 208000009893 Nonpenetrating Wounds Diseases 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
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- 230000001627 detrimental effect Effects 0.000 description 1
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Classifications
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- 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
- F41H5/023—Armour plate, or auxiliary armour plate mounted at a distance of the main armour plate, having cavities at its outer impact surface, or holes, for deflecting the projectile
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- 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
- F41H5/0485—Layered armour containing fibre- or fabric-reinforced layers all the layers being only fibre- or fabric-reinforced layers
Abstract
The invention relates to the technical field of bulletproof armor plates, in particular to a combined bulletproof plate and a preparation method thereof. The combined bulletproof plate sequentially comprises a shearing resistant layer, a stretching resistant layer and a deformation resistant layer which are stacked; the anti-shearing layer accounts for 5% -30% of the total mass of the combined bulletproof plate; the tensile resistant layer accounts for 40-90% of the total mass of the combined bulletproof plate; the deformation-resistant layer accounts for 5% -30% of the total mass of the combined bulletproof plate; the anti-shearing layer comprises a first polyethylene fiber laid composite cloth; the stretch-resistant layer comprises a second polyethylene fiber laid composite fabric; the deformation-resistant layer comprises third polyethylene fiber laid composite cloth. The bulletproof armor has the advantages that the bulletproof performance and the back-convex reducing performance of the bulletproof armor are improved by arranging the anti-shearing layer, the anti-stretching layer and the anti-deformation layer of the three different functional areas.
Description
Technical Field
The invention relates to the technical field of bulletproof armor plates, in particular to a combined bulletproof plate and a preparation method thereof.
Background
The light bulletproof armor equipment mainly comprises a bulletproof armor plate, a bulletproof inserting plate, a bulletproof helmet and the like, and the bulletproof armor mainly faces two kinds of injuries when defending against the damage of bullets: penetrating injury; and the deformation of the bulletproof material caused by high-speed impact of the bullet head when the bullet head is not penetrated can cause impact injury to human bodies or equipment.
At present, light bulletproof armor equipment is mainly prepared by compounding weftless composite cloth prepared by compounding ultrahigh molecular weight polyethylene fiber and an adhesive as a bulletproof material through hot-pressing compounding. The bulletproof mechanism mainly comprises: the bullet-resistant energy-absorbing mechanism comprises a bullet-facing material, a middle layer and a back material, wherein the bullet-facing material absorbs energy in a fiber shearing fracture mode, the middle layer absorbs energy in a fiber stretching fracture mode and a layering mode, and the back material absorbs energy in a stretching bulge mode.
The prior ultra-high molecular weight polyethylene fiber bulletproof plate is basically prepared by hot pressing the same weftless composite cloth and structural lamination, and the performance of the ultra-high molecular weight polyethylene fiber material in the aspects of bulletproof performance and back-convex reducing performance is difficult to be considered.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a combined bulletproof plate and a manufacturing method thereof, which have the advantages of both bulletproof performance and back-protrusion reduction, and are used to solve the problems in the prior art.
In order to achieve the above and other related objects, an aspect of the present invention provides a combined ballistic panel, which includes, in order, a shear resistant layer, a tensile resistant layer, and a deformation resistant layer that are stacked; the anti-shearing layer accounts for 5% -30% of the total mass of the combined bulletproof plate; the stretch-resistant layer accounts for 40% -90% of the total mass of the combined bulletproof plate; the deformation-resistant layer accounts for 5% -30% of the total mass of the combined bulletproof plate; the anti-shearing layer comprises a plurality of layers of first polyethylene fiber laid composite cloth; the stretch-resistant layer comprises a plurality of layers of second polyethylene fiber laid composite cloth; the deformation-resistant layer comprises a plurality of layers of third polyethylene fiber laid composite cloth.
In some embodiments of the invention, the content of the ultra-high molecular weight polyethylene fiber in the first polyethylene fiber laid composite fabric is 85-95%; preferably, the molecular weight of the ultra-high molecular weight polyethylene fiber is 200 to 500 ten thousand; the crystallinity of the ultra-high molecular weight polyethylene fiber is more than 80%, and the orientation degree is more than 90%. In some embodiments of the invention, the first polyethylene fiber laid composite fabric comprises a plurality of layers of laid fabrics, and the lamination angle of the single layer adjacent to the laid fabrics is 0/90 °.
In some embodiments of the invention, the impact strength of the material of the first polyethylene fiber laid composite fabric in the shear resistant layer is more than or equal to 90kJ/m 2 。
In some embodiments of the invention, the second polyethylene fiber laid composite fabric has an ultrahigh molecular weight polyethylene fiber content of 75% to 85%; preferably, the polyethylene of the ultra-high molecular weight polyethylene fiber has a molecular weight of 200 to 500 ten thousand; the crystallinity of the ultra-high molecular weight polyethylene fiber is more than 80%, and the orientation degree is more than 90%.
In some embodiments of the invention, the second polyethylene fiber laid composite fabric comprises a plurality of layers of laid fabrics, and the lamination angle of the single layer adjacent to the laid fabrics is 0/90.
In some embodiments of the invention, the 180 DEG peel strength of the material of the second polyethylene fiber laid composite fabric in the stretch resistant layer is 1kN/m to 10kN/m.
In some embodiments of the invention, the third polyethylene fiber laid composite fabric has an ultrahigh molecular weight polyethylene fiber content of 70% to 85%; preferably, the molecular weight of the ultra-high molecular weight polyethylene fiber is 200 to 500 ten thousand; the crystallinity of the ultrahigh molecular weight polyethylene fiber is more than 80 percent, and the orientation degree is more than 90 percent.
In some embodiments of the invention, the third polyethylene fiber laid composite fabric comprises a plurality of layers of laid fabrics, and the lamination angle of the single layer adjacent to the laid fabrics is 0/90 °/45 °/135 °.
In some embodiments of the present invention, the third polyethylene fiber laid composite fabric in the deformation resistant layer has a flexural modulus of 5Gpa to 30Gpa.
In some embodiments of the invention, the combined ballistic panel has an areal density of 5kg/m 2 ～30kg/m 2 。
According to another aspect of the present invention, there is provided a method for preparing the combined ballistic panel of the present invention, comprising sequentially laminating and hot pressing the shear resistant layer, the tensile resistant layer and the deformation resistant layer into a whole.
In some embodiments of the invention, the pressure of the hot pressing is 10 to 30MPa; the processing temperature is 120-145 ℃; keeping the temperature and the pressure for 10-150min.
Another aspect of the invention provides the use of a modular ballistic panel according to the invention in lightweight ballistic armor equipment.
Compared with the prior art, the combined bulletproof plate has the following beneficial effects:
the combined bulletproof plate is a multi-layer combined bulletproof plate, combines the bulletproof mechanism of the ultra-high molecular weight polyethylene fiber plate, and improves the bulletproof performance and the back-protrusion reducing performance of the bulletproof armor by setting up the anti-shearing layer, the anti-stretching layer and the anti-deformation layer of three different functional regions. Wherein: 1. the shear resistant layer has ultrahigh molecular weight polyethylene fiber with ultrahigh content and excellent shock resistance, can fully exert the shear fracture resistance of the ultrahigh molecular weight polyethylene fiber on the bullet-facing surface of the bulletproof armor plate, and fully absorb the impact energy of the bullet; 2. the tensile layer positioned in the middle of the armor has proper contents of the ultra-high molecular weight polyethylene fiber and the glue, so that the tensile pull-out fracture of the ultra-high molecular weight polyethylene fiber and the bonding layering energy absorption capacity between layers can be fully exerted; 3. the deformation-resistant layer enables the energy absorption of the back protrusion of the bulletproof plate to be concentrated on the 0/90-degree direction (the damaged shape of the back is approximately cross) but dispersed on a larger cloth cover (the damaged shape of the back is approximately round) by arranging the multi-angle ultra-high molecular weight polyethylene fiber laid composite cloth lamination, and meanwhile, the deformation condition of the material is controlled by controlling the bending modulus of the material, so that the back protrusion of the bulletproof armor is reduced, and the non-penetrating injury is reduced.
Drawings
Fig. 1 is a schematic structural view of the combined bulletproof plate of the present invention.
In the figure, the position of the upper end of the main shaft,
1. shear resistant layer
2. Stretch resistant layer
3. Deformation resistant layer
Detailed Description
Hereinafter, embodiments of the composite ballistic panel of the present application and the method of manufacturing the same are specifically disclosed in the detailed description.
The "ranges" disclosed herein are defined in terms of lower limits and upper limits, with a given range being defined by a selection of one lower limit and one upper limit that define the boundaries of the particular range. Ranges defined in this manner may or may not include endpoints and may be arbitrarily combined, i.e., any lower limit may be combined with any upper limit to form a range. For example, if ranges of 60-120 and 80-110 are listed for a particular parameter, it is understood that ranges of 60-110 and 80-120 are also contemplated. Furthermore, if the minimum range values 1 and 2 are listed, and if the maximum range values 3,4, and 5 are listed, the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4 and 2-5. In this application, unless otherwise stated, the numerical range "a-b" represents a shorthand representation of any combination of real numbers between a and b, where a and b are both real numbers. For example, a numerical range of "0 to 5" indicates that all real numbers between "0 to 5" have been listed herein, and "0 to 5" is only a shorthand representation of the combination of these numbers. In addition, when a parameter is an integer of 2 or more, it is equivalent to disclose that the parameter is, for example, an integer of 2, 3,4, 5, 6, 7, 8, 9, 10, 11, 12, or the like.
The inventor provides a combined bulletproof plate and a preparation method thereof through a large number of exploration experiments, and by combining the bulletproof mechanism of an ultra-high molecular weight polyethylene fiber plate, the bulletproof performance and the back-protrusion reducing performance of a bulletproof armor are improved by setting a shear-resistant layer 1, a stretch-resistant layer 2 and a deformation-resistant layer 3 of three different functional regions. On the basis of this, the present invention has been completed.
The invention provides a combined bulletproof plate, which sequentially comprises a shear-resistant layer 1, a tensile-resistant layer 2 and a deformation-resistant layer 3 which are arranged in a stacked manner; the anti-shearing layer 1 accounts for 5% -30% of the total mass of the combined bulletproof plate; the stretch-resistant layer 2 accounts for 40-90% of the total mass of the combined bulletproof plate; the deformation-resistant layer 3 accounts for 5-30% of the total mass of the combined bulletproof plate; the shear resistant layer 1 comprises a plurality of layers of first polyethylene fiber laid composite cloth; the anti-stretching layer 2 comprises a plurality of layers of second polyethylene fiber laid composite cloth; the deformation-resistant layer 3 comprises a plurality of layers of third polyethylene fiber laid composite cloth.
In the combined bulletproof plate provided by the invention, the content of the ultra-high molecular weight polyethylene fiber in the first polyethylene fiber laid composite cloth is 85-95%; preferably, the molecular weight of the ultra-high molecular weight polyethylene fiber is 200 to 500 ten thousand; the crystallinity of the ultra-high molecular weight polyethylene fiber is more than 80%, and the orientation degree is more than 90%. The components of the first polyethylene fiber laid composite fabric except the ultra-high molecular weight polyethylene fiber are glue.
In the combined bulletproof plate provided by the invention, the first polyethylene fiber weftless composite cloth comprises a plurality of layers of weftless cloth, and the lamination composite angle of the adjacent weftless cloth in a single layer is 0/90 degrees. Wherein the composite angle of the single-layer adjacent laid fabric layers is 0/90 degrees. The 0 degree means that the ultra-high molecular weight polyethylene fiber is unidirectional cloth, a plurality of bundles of fibers are arranged orderly in one direction and then are bonded by an adhesive, and the 0/90 degree compounding means that one 0 degree unidirectional cloth is rotated by 90 degrees and then is laminated and compounded with one 0 degree unidirectional cloth.
In the combined bulletproof plate provided by the invention, the impact strength of the material of the first polyethylene fiber laid composite cloth in the anti-shearing layer 1 is more than or equal to 90kJ/m 2 . Preferably more than 120kJ/m 2 。
In the combined bulletproof plate provided by the invention, the content of ultrahigh molecular weight polyethylene fibers in the second polyethylene fiber laid composite cloth is 75-85%; preferably, the molecular weight of the ultra-high molecular weight polyethylene fiber is 200 to 500 ten thousand; the crystallinity of the ultra-high molecular weight polyethylene fiber is more than 80%, and the orientation degree is more than 90%. The components of the second polyethylene fiber laid composite fabric except the ultra-high molecular weight polyethylene fiber are glue.
In the combined bulletproof plate provided by the invention, the second polyethylene fiber laid composite fabric comprises a plurality of layers of laid fabrics, and the laminated composite angle of the adjacent laid fabrics of a single layer is 0/90 degrees. The 0 degree means that the ultra-high molecular weight polyethylene fiber is unidirectional cloth, a plurality of bundles of fibers are arranged orderly in one direction and then are bonded by an adhesive, and the 0/90 degree compounding means that one 0 degree unidirectional cloth is rotated by 90 degrees and then is laminated and compounded with one 0 degree unidirectional cloth.
In the combined bulletproof plate provided by the invention, the 180-degree peel strength of the material of the second polyethylene fiber laid composite fabric in the stretch-resistant layer 2 is 1 kN/m-10 kN/m. Too low a peel strength (below 1 kN/m) or too high a peel strength (above 10 kN/m) is detrimental to the tensile pull-out failure of the ultra high molecular weight polyethylene fibers and the energy absorption capability of the bonding delamination between the layers. In some embodiments, the 180 DEG peel strength of the material of the second polyethylene fiber laid composite fabric in the stretch-resistant layer 2 can also be 1kN/m to 3kN/m, 3kN/m to 5kN/m, 5kN/m to 8kN/m, 8kN/m to 10kN/m, and the like.
In the combined bulletproof plate provided by the invention, the content of the ultrahigh molecular weight polyethylene fiber in the third polyethylene fiber weftless composite cloth is 70-85%; preferably, the molecular weight of the ultra-high molecular weight polyethylene fiber is 200 to 500 ten thousand; the crystallinity of the ultra-high molecular weight polyethylene fiber is more than 80%, and the orientation degree is more than 90%. The third polyethylene fiber laid composite fabric is glue except the ultra-high molecular weight polyethylene fiber.
In the combined bulletproof plate provided by the invention, the flexural modulus of the material of the deformation-resistant layer 3 is 5Gpa to 30Gpa. And the material with too low flexural modulus (for example, the flexural modulus is lower than 5 Gpa) has large deformation amount, and is easy to cause non-penetrating impact damage, and the material with high flexural modulus (for example, higher than 30 Gpa) is favorable for controlling deformation but not favorable for absorbing deformation energy of the material, and influences the bulletproof performance of the bulletproof plate. In some embodiments, the material of the deformation resistant layer 3 may have a flexural modulus of, for example, 5 to 10Gpa, 10 to 15Gpa, 15 to 20Gpa, 20 to 25Gpa, or 25 to 30Gpa, etc.
In the combined bulletproof plate provided by the invention, the third polyethylene fiber laid composite fabric comprises a plurality of layers of laid fabrics, and the laminated composite angle of the adjacent single layers of laid fabrics is 0/90 DEG/45 DEG/135 deg. Wherein the multi-angle compounding is beneficial to dispersing the impact energy of the bullet to a larger bulletproof cloth cover. The 0-degree unidirectional cloth can rotate to 45 degrees, 135 degrees or any angle, and then is laminated and compounded with another 0-degree unidirectional cloth. The angle can be in a range value, and the 0/90 °/45 °/135 ° composite angle is the optimal scheme for both impact deformation resistance and elasticity prevention.
In the combined bulletproof plate provided by the invention, the surface density of the combined bulletproof plate can be 5kg/m 2 ～30kg/m 2 、5kg/m 2 ～10kg/m 2 、10kg/m 2 ～15kg/m 2 、15kg/m 2 ～20kg/m 2 、20kg/m 2 ～25kg/m 2 Or 25kg/m 2 ～30kg/m 2 And the like.
The invention provides a preparation method of a combined bulletproof plate, which comprises the steps of sequentially laminating and hot-pressing a shear-resistant layer 1, a tensile-resistant layer 2 and a deformation-resistant layer 3 into a whole.
In the preparation method of the combined bulletproof plate provided by the invention, the pressure of hot pressing is 10-30 MPa; the processing temperature is 120-145 ℃; keeping the temperature and the pressure for 10-150min.
In some embodiments, the pressure may also be, for example, 10 to 20MPa, 20 to 30MPa, 10 to 15MPa, 15 to 20MPa, 20 to 25MPa, or 25 to 30MPa, or the like.
In some embodiments, the processing temperature can be, for example, 120-130 deg.C, 130-145 deg.C, 120-125 deg.C, 125-130 deg.C, 130-135 deg.C, 135-140 deg.C, 140-145 deg.C, or the like.
In some embodiments, the holding time may be, for example, 10-50min, 50-100min, or 100-150min, etc.
A third aspect of the invention provides the use of a modular ballistic panel according to the first aspect of the invention in lightweight ballistic armour equipment.
In conclusion, the combined bulletproof plate of the invention:
1. the shear resistant layer 1 has ultrahigh molecular weight polyethylene fiber with ultrahigh content and excellent shock resistance, can fully exert the shear fracture resistance of the ultrahigh molecular weight polyethylene fiber on the bullet-facing surface of the bulletproof armor plate, and fully absorb the impact energy of the bullet.
2. The tensile layer 2 positioned in the middle of the armor has proper contents of the ultra-high molecular weight polyethylene fiber and the glue, and can fully exert the tensile pull-out fracture of the ultra-high molecular weight polyethylene fiber and the bonding layering energy absorption capacity between layers.
3. The deformation-resistant layer 3 enables the energy absorption of the back protrusion of the bulletproof plate to be concentrated on the 0/90-degree direction (the damaged shape of the back is similar to a cross shape) but dispersed on a larger cloth cover (the damaged shape of the back is similar to a circle) by arranging the multi-angle ultra-high molecular weight polyethylene fiber laid composite cloth lamination, and meanwhile, the deformation condition of the material is controlled by controlling the bending modulus of the material, so that the back protrusion of the bulletproof armor is reduced, and the non-penetrating injury is reduced.
The following examples are provided to further illustrate the advantageous effects of the present invention.
In order to make the objects, technical solutions and advantageous technical effects of the present invention more clear, the present invention is further described in detail below with reference to examples. However, it should be understood that the embodiments of the present invention are only for explaining the present invention and not for limiting the present invention, and the embodiments of the present invention are not limited to the embodiments given in the specification. The examples were made under conventional conditions, or conditions recommended by the material suppliers, without specifying specific experimental conditions or operating conditions.
Furthermore, it is to be understood that one or more method steps recited in the present disclosure are not exclusive of other method steps that may also be present before or after the recited combination of steps or that other method steps may also be inserted between the explicitly recited steps, unless otherwise indicated; it is also to be understood that a combined connection between one or more devices/apparatus as referred to in the present application does not exclude that further devices/apparatus may be present before or after the combined device/apparatus or that further devices/apparatus may be interposed between two devices/apparatus explicitly referred to, unless otherwise indicated. Moreover, unless otherwise indicated, the numbering of the various method steps is merely a convenient tool for identifying the various method steps, and is not intended to limit the order in which the method steps are arranged or the scope of the invention in which the invention may be practiced, and changes or modifications in the relative relationship may be made without substantially changing the technical content.
In the following examples, reagents, materials and instruments used are commercially available unless otherwise specified.
In each example, the impact strength of the material is tested according to the method for testing the SIMspecimen beam impact toughness of GB/T1451-2005 fiber reinforced plastics.
The 180 DEG peel strength of the material is tested in accordance with GB/T2791-1995 adhesive T peel strength test method.
The flexural modulus of the material is tested according to the test method of the flexural property of the GB/T1449-2005 fiber reinforced plastic.
Ultra-high molecular weight polyethylene fibers were purchased from jiujiujiujiu technologies ltd, jiang.
Example 1
Pressing a block with the surface density of 18kg/m by a flat plate press under the conditions that the pressure is 20MPa, the temperature is 135 ℃, and the heat preservation and pressure maintaining are carried out for 90 minutes 2 The combined ultra-high molecular weight polyethylene fiber bulletproof plate specifically comprises the following components from the bullet-facing surface: 20 percent of shear resistant layer 1, wherein the content of the ultra-high molecular weight polyethylene fiber accounts for 90 percent, and the impact strength of the material of the shear resistant layer 1 is 120kJ/m 2 (ii) a 50% of the anti-stretching layer 2, wherein the content of the ultra-high molecular weight polyethylene fiber accounts for 80%, and the 180-degree peel strength of the material of the anti-stretching layer 2 is 2.53kN/m;30% of the anti-deformation layer 3, wherein the content of the ultra-high molecular weight polyethylene fiber accounts for 80%, each single-layer weftless fabric is overlapped and compounded according to 0/90 DEG/45 DEG/135 DEG, and the bending modulus of the material of the anti-deformation layer 3 is 11Gpa.
Wherein, 20% of the shear resistant layer 1 means that the shear resistant layer 1 accounts for 20% of the total mass of the combined bulletproof plate. And 50% of the tensile layer 2 means that the tensile layer 2 accounts for 50% of the total mass of the combined bulletproof plate. The 30% deformation-resistant layer 3 means that the deformation-resistant layer 3 accounts for 30% of the total mass of the combined bulletproof plate. The remaining examples are explained here.
Example 2
Pressing a block by a flat plate press under the conditions of 30MPa of pressure, 130 ℃ of temperature and 60 minutes of heat preservation and pressure maintaining to obtain a block with the surface density of 18kg/m 2 Combined type superThe high molecular weight polyethylene fiber bulletproof plate specifically comprises the following components from the bullet-facing surface: 30 percent of the anti-shearing layer 1, wherein the content of the ultra-high molecular weight polyethylene fiber accounts for 95 percent, and the balance is glue. Impact strength of 90kJ/m of shear resistant layer 1 material 2 (ii) a 60 percent of the stretch-proof layer 2, wherein the content of the ultra-high molecular weight polyethylene fiber accounts for 78 percent, and the balance is glue. The 180-degree peel strength of the material of the anti-stretching layer 2 is 5kN/m;10% of deformation-resistant layer 3, wherein the content of the ultra-high molecular weight polyethylene fiber accounts for 80%, and the balance is glue. Each single-layer weftless fabric is superposed and compounded according to the angle of 0/90 DEG/45 DEG/135 DEG, and the bending modulus of the material of the deformation-resistant layer 3 is 5Gpa.
Example 3
Pressing a block by a flat plate press under the conditions of 10MPa of pressure, 140 ℃ of temperature and 120 minutes of heat preservation and pressure maintaining to obtain a block with the surface density of 18kg/m 2 The combined type ultra-high molecular weight polyethylene fiber bulletproof plate specifically comprises the following components from a bullet facing surface: 10% of the anti-shearing layer 1, wherein the content of the ultra-high molecular weight polyethylene fiber accounts for 85%, and the balance is glue. Impact strength of 140kJ/m of shear resistant layer 1 material 2 (ii) a 70 percent of the stretch-proof layer 2, wherein the content of the ultra-high molecular weight polyethylene fiber accounts for 88 percent, and the balance is glue. The 180-degree peel strength of the material of the anti-stretching layer 2 is 1.79kN/m;20% of deformation-resistant layer 3, wherein the content of the ultra-high molecular weight polyethylene fiber accounts for 75%, and the balance is glue. Each single-layer weftless fabric is superposed and compounded according to the angle of 0/90 DEG/45 DEG/135 DEG, and the bending modulus of the material of the deformation-resistant layer 3 is 20Gpa.
Comparative example 1
As in example 1, a block was pressed to an areal density of 18kg/m 2 The ultra-high molecular weight polyethylene fiber bulletproof plate of (1), wherein the bulletproof material and the structure are the same as the shear resistant layer 1 in example 1.
Comparative example 2
As in example 1, a block was pressed to an areal density of 18kg/m 2 The ultra-high molecular weight polyethylene fiber ballistic panel of (1), wherein the ballistic material and structure are identical to the tensile layer 2 of example 1.
Comparative example 3
As in example 1, a block was pressed to an areal density of 18kg/m 2 The ultra-high molecular weight polyethylene fiber bulletproof plate of (1), wherein the bulletproof material and the structure are the same as the deformation-resistant layer 3 in example 1.
Comparative example 4
Pressing a block with the surface density of 18kg/m by a flat plate press under the conditions that the pressure is 15MPa, the temperature is 130 ℃, and the heat preservation and pressure maintaining time is 120 minutes 2 The combined ultra-high molecular weight polyethylene fiber bulletproof plate specifically comprises the following components from the bullet-facing surface: 40% of the anti-shearing layer 1, wherein the content of the ultra-high molecular weight polyethylene fiber accounts for 80%, and the balance is glue. Impact strength of 70kJ/m of shear resistant layer 1 material 2 (ii) a The balance being glue. 40% of the anti-stretching layer 2, wherein the content of the ultra-high molecular weight polyethylene fiber accounts for 70%, and the 180-degree peel strength of the material of the anti-stretching layer 2 is 12kN/m;20% of the anti-deformation layer 3, wherein the content of the ultra-high molecular weight polyethylene fiber accounts for 80%, and the balance is glue. The single-layer non-woven fabrics are superposed and compounded according to the angle of 0/90 degrees, and the bending modulus of the material of the deformation-resistant layer 3 is 15Gpa.
The ballistic panels obtained by pressing the above-described example 1 and comparative examples 1 to 3 were cut into 250X 300mm sizes and subjected to ballistic tests according to protection grade 5 in GA141-2010 standard, i.e., 7.62mm semi-automatic rifle of 1956, which fired 7.62mm plain bullets of 1956 (steel core) at a bullet firing rate of 725. + -.10 m/s for 3 bullets per panel; the experimental data are shown in table 1.
TABLE 1
As can be seen from the data in Table 1, the ballistic resistant panels prepared by the method of examples 1-3 according to the present invention can significantly combine and exert the advantages of the ultrahigh molecular weight polyethylene fiber material in terms of ballistic resistance and back-bulge reduction.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (10)
1. The combined bulletproof plate is characterized by sequentially comprising an anti-shearing layer, a tensile layer and a deformation-resistant layer which are arranged in a stacked manner; the anti-shearing layer accounts for 5% -30% of the total mass of the combined bulletproof plate; the stretch-resistant layer accounts for 40% -90% of the total mass of the combined bulletproof plate; the deformation-resistant layer accounts for 5% -30% of the total mass of the combined bulletproof plate; the shear resistant layer comprises a plurality of layers of first polyethylene fiber laid composite cloth; the stretch-resistant layer comprises a plurality of layers of second polyethylene fiber laid composite cloth; the anti-deformation layer comprises a plurality of layers of third polyethylene fiber laid composite cloth.
2. The combined bulletproof plate of claim 1, wherein the content of the ultra-high molecular weight polyethylene fibers in the first polyethylene fiber laid composite fabric is 85-95%; preferably, the molecular weight of the ultra-high molecular weight polyethylene fiber is 200 to 500 ten thousand; the crystallinity of the ultrahigh molecular weight polyethylene fiber is more than 80 percent, and the orientation degree is more than 90 percent.
3. The combination ballistic panel of claim 1 wherein the first polyethylene fiber laid composite fabric comprises a plurality of layers of laid fabric, a single layer having a lamination angle of 0/90 ° adjacent to the laid fabric;
and/or the impact strength of the material of the first polyethylene fiber laid composite fabric in the shear resistant layer is more than or equal to 90kJ/m 2 。
4. The combination ballistic panel of claim 1 wherein the second polyethylene fiber laid composite fabric has an ultra high molecular weight polyethylene fiber content of 75% to 85%; preferably, the polyethylene of the ultra-high molecular weight polyethylene fiber has a molecular weight of 200 to 500 ten thousand; the crystallinity of the ultra-high molecular weight polyethylene fiber is more than 80%, and the orientation degree is more than 90%.
5. The combination ballistic panel of claim 1 wherein the second polyethylene fiber laid composite fabric comprises a plurality of layers of laid fabric, a single layer having a lamination angle of 0/90 ° adjacent to the laid fabric;
and/or the 180-degree peel strength of the material of the second polyethylene fiber laid composite fabric in the stretch-resistant layer is 1 kN/m-10 kN/m.
6. The combination ballistic panel of claim 1 wherein the third polyethylene fiber laid composite fabric has an ultra high molecular weight polyethylene fiber content of from 70% to 85%; preferably, the molecular weight of the ultra-high molecular weight polyethylene fiber is 200 to 500 ten thousand; the crystallinity of the ultra-high molecular weight polyethylene fiber is more than 80%, and the orientation degree is more than 90%.
7. The combination ballistic panel of claim 1 wherein the third polyethylene fiber laid composite fabric comprises a plurality of layers of laid fabric, a single layer having a lamination angle of 0/90 °/45 °/135 ° adjacent to the laid fabric;
and/or the flexural modulus of the material of the third polyethylene fiber laid composite fabric in the deformation-resistant layer is 5 Gpa-30 Gpa; and/or the combined bulletproof plate has an area density of 5kg/m 2 ～30kg/m 2 。
8. The method for preparing a combined ballistic panel of any one of claims 1-7, which comprises sequentially laminating and heat-pressing a shear resistant layer, a tensile resistant layer and a deformation resistant layer into a single body.
9. The method for preparing a combined ballistic panel of claim 8 wherein the pressure of the hot pressing is 10 to 30MPa; the processing temperature is 120-145 ℃; keeping the temperature and the pressure for 10-150min.
10. Use of a modular ballistic panel according to any one of claims 1 to 7 in lightweight ballistic armour.
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| CN202211080763.2A CN115265278A (en) | 2022-09-05 | 2022-09-05 | Combined bulletproof plate and preparation method thereof |
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| CN202211080763.2A CN115265278A (en) | 2022-09-05 | 2022-09-05 | Combined bulletproof plate and preparation method thereof |
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