CN114061374A - Novel-structure body armor chip and softness testing method - Google Patents

Novel-structure body armor chip and softness testing method Download PDF

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Publication number
CN114061374A
CN114061374A CN202111336669.4A CN202111336669A CN114061374A CN 114061374 A CN114061374 A CN 114061374A CN 202111336669 A CN202111336669 A CN 202111336669A CN 114061374 A CN114061374 A CN 114061374A
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China
Prior art keywords
chip
formaldehyde resin
bulletproof
body armor
layer
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CN202111336669.4A
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Inventor
李年华
艾青松
陈虹
虎龙
许冬梅
方心灵
李宗家
崔正浩
刘元坤
吴中伟
潘智勇
傅丽强
张静
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Beijing Aerospace Rate Mechanical & Electrical Engineering Co ltd
Beijing Institute of Aerospace Testing Technology
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Beijing Aerospace Rate Mechanical & Electrical Engineering Co ltd
Beijing Institute of Aerospace Testing Technology
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Priority to CN202111336669.4A priority Critical patent/CN114061374A/en
Publication of CN114061374A publication Critical patent/CN114061374A/en
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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
    • F41H1/00—Personal protection gear
    • F41H1/02—Armoured or projectile- or missile-resistant garments; Composite protection fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0078—Testing material properties on manufactured objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2571/00—Protective equipment
    • B32B2571/02—Protective equipment defensive, e.g. armour plates or anti-ballistic clothing

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
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  • Pathology (AREA)
  • Textile Engineering (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

The invention provides a novel-structure body armor chip and a softness testing method, and belongs to the field of individual protection. The method aims to solve the problems that the light weight, the comfort and the excellent bulletproof performance are difficult to be considered at the same time, the production and manufacturing cost is high, and an effective softness testing method for soft protective materials is lacked. The novel structural bullet-proof vest chip comprises a protective layer and a waterproof sleeve, wherein the protective layer consists of a bullet-proof layer and a buffer layer; the bulletproof layer is formed by compounding multiple layers of fiber cloth, and is formed by sequentially arranging a poly-p-phenylene benzobisoxazole fiber woven fabric (PB0 fiber woven fabric), an aramid fiber woven fabric, high-strength polyamide fiber non-woven cloth and aramid fiber non-woven cloth from a bullet hitting surface inwards; the buffer layer is made of high foaming ethylene-vinyl acetate foam (EVA). The bulletproof vest chip has the advantages of softness, light weight, low cost and the like, and better meets the requirements of the international market; the softness testing device is simple, the testing is convenient and easy, the cost is low, the testing result can describe the softness of the bulletproof chip material closely and comprehensively, the high consistency is realized with the subjective evaluation of a wearer, and the popularization and the application of comfortable bulletproof vest are facilitated.

Description

Novel-structure body armor chip and softness testing method
Technical Field
The invention belongs to the field of individual protection, and particularly relates to a novel-structure body armor chip and a softness testing method.
Background
Under the large background of international situation wind and cloud fall, regional local conflicts frequently occur, particularly terrorist attacks of extreme organizations, and a large number of injuries and deaths of military, police and people are caused. The body armor is used as important individual protective equipment, prevents penetration by absorbing and dissipating kinetic energy of warheads and fragments, further effectively protects the protected part of a human body, and is widely applied to the fields of military, police, civil and the like. In order to maintain the stability of the international environment and ensure the civilization, progress and prosperity of the human society, the anti-terrorism strength is continuously increased, and the market demand of the body armor is also expanded year by year.
With the continuous development of scientific technology and the change of high and new technical materials, the research level of body armor is continuously improved, the performance requirements of the market on the body armor are not limited to bulletproof performance, the lightweight and comfortable body armor is continuously developed on the premise of meeting excellent protective performance, the life health and safety of a protective object are ensured, and the protective object can be ensured to perform normal activities (such as a series of actions of squatting, jumping, running and the like) at the same time, so that the task can be completed more quickly and better. Therefore, the traditional hard body armor is gradually eliminated, soft protective materials mainly made of aramid fiber are increasingly applied to the preparation of the body armor, and particularly in recent years, the price of aramid fiber protofilaments is reduced, so that the market advantage of the aramid fiber body armor is remarkable.
The soft bulletproof vest structurally comprises a bulletproof chip and an outer sleeve, wherein the bulletproof chip comprises a protective layer and a waterproof sleeve. The bulletproof chip is a key factor for determining the bulletproof performance, light weight and softness (comfort) of the protective equipment. At the present stage, the standard for ballistic protection with high international acceptance is the NIJ 0101.06 body armor standard of the U.S. department of justice, in which the customer demands the most protection with a class IIIA armor and on the basis of this also demands good flexibility. However, the soft aramid bulletproof vest cannot balance the comfort and the bulletproof performance well, and the softness of the bulletproof vest is greatly reduced by additionally adding a PC plate or an aramid fiber pressing plate to prevent overlarge impact depression. Chinese patent CN 212109742U discloses a bulletproof chip with soft anti-sag material and a bulletproof vest comprising the same, wherein a three-dimensional composite layer is used as an anti-sag layer, so that the wearing comfort is improved; chinese patent CN 210689387U discloses a bulletproof chip and a body armor comprising the same, wherein a first UD composite material layer, a second UD composite material layer and a fabric layer are sequentially connected to an anti-recess layer, so that the flexibility of the bulletproof chip is improved; chinese patent CN 111457790A discloses a soft and light bulletproof vest chip and a manufacturing method thereof, wherein the softness of aramid fiber cloth is improved through the toughening of aqueous polyurethane, and the softness of the bulletproof chip is tested and represented through the half free falling angle. It can be found that the soft protection raw material mainly comprises aramid fiber, the improvement of the prior art is mainly to improve the flexibility of the body armor by changing the performance of the raw material or improving the weaving process, or to increase the production cost of the body armor product, or to reduce the bulletproof performance, and the structure of the bulletproof chip is not deeply optimized, which is not beneficial to the popularization of the body armor product in domestic and international markets; meanwhile, because the soft protection chip is of a laminated structure of multiple layers of fiber cloth, the existing softness test system and the standard cannot be described and evaluated in a close-fitting manner, the half-edge free falling angle has a great deal of human errors by measuring the included angle between the tangent line of the curling point of the falling sample and the extension line of the desktop, the operation is difficult, the softness test of the bulletproof chip is not accurate, the acceptance in the industry is difficult to obtain, and the popularization and the development of comfortable bulletproof clothes are not facilitated.
Therefore, aiming at the defects and shortcomings, the invention provides a novel structural bullet-proof vest chip and a softness testing method.
Disclosure of Invention
The invention aims to solve the problems that the current bulletproof vest chip is difficult to combine light weight, comfort and excellent bulletproof performance, the production and manufacturing cost is high, and an effective softness testing method for soft protective materials is lacked.
The invention is realized by the following technical scheme:
a novel structural bullet-proof vest chip comprises a protective layer and a waterproof jacket, wherein the protective layer consists of a bullet-proof layer and a buffer layer. The bulletproof layer is formed by compounding multiple layers of fiber cloth, and is formed by sequentially arranging a poly-p-phenylene benzobisoxazole fiber woven fabric (PBO fiber woven fabric), an aramid fiber woven fabric, a high-strength polyamide fiber non-woven fabric and an aramid fiber non-woven fabric from a bullet hitting surface to the inside; the buffer layer is made of high foaming ethylene-vinyl acetate foam (EVA).
The PBO fiber woven fabric comprises 0-2 layers, 1-3 layers of aramid fiber woven fabric, 1-3 layers of high-strength nylon fiber laid fabric, 10-14 layers of aramid fiber laid fabric and 1 layer of EVA.
Preferably, the PBO fiber woven fabric is 2 layers, the aramid fiber woven fabric is 1-2 layers, the high-strength polyamide fiber laid fabric is 2 layers, the aramid fiber laid fabric is 11-12 layers, and the EVA is 1 layer.
Further, modified urea-formaldehyde resin adhesives are used for bonding between the bulletproof layer and the buffer layer, between the same fiber cloth layers and between different fiber cloth layers, the bulletproof layer and the buffer layer are placed at 120-150 ℃ after bonding, drying is carried out for 3-5 hours, the protective layer of the bulletproof vest chip with the novel structure is obtained, and then the protective layer is subjected to edge sealing and packaging by using a waterproof sleeve, so that the bulletproof vest chip with the novel structure is obtained.
The preparation method of the modified urea-formaldehyde resin adhesive comprises the following steps: urea formaldehyde resin, aluminum sulfate, beta-methyl propoxide, polymethyl methacrylate, microcrystalline paraffin, a silane coupling agent KH-550 and bentonite are respectively weighed according to the mass ratio of 60-70: 8-10: 5-10: 3-5: 1-3; dissolving urea-formaldehyde resin into a tetrahydrofuran solution according to a mass-to-volume ratio (g: ml) of 1: 10, and mechanically stirring at a rotating speed of 100-200 r/min for 10-30 min to obtain a urea-formaldehyde resin dispersion liquid; adding a silane coupling agent KH-550 into a urea-formaldehyde resin dispersion liquid, mechanically stirring for 5-10 min at the rotating speed of 300-500 r/min, then adding aluminum sulfate, bentonite and microcrystalline paraffin, continuously mechanically stirring for 20-30 min at the rotating speed of 800-1000 r/min, and simultaneously dispersing for 30min by using ultrasound, wherein the ultrasonic power is 200W, and the frequency is 50KHz, so as to obtain a modified urea-formaldehyde resin mixed liquid; adding beta-methyl propoxide and polymethyl methacrylate into the modified urea-formaldehyde resin mixed solution, and mechanically stirring for 60-90 min at the rotating speed of 500-800 r/min to obtain a modified urea-formaldehyde resin adhesive precursor; and placing the precursor of the modified urea-formaldehyde resin adhesive in an oven at 70-80 ℃ for 2-3 h to obtain the modified urea-formaldehyde resin adhesive.
Furthermore, the invention also provides a method for testing the softness of the novel structural body armor chip on the basis of providing the novel structural body armor chip.
The method for testing the softness of the novel structural body armor chip specifically comprises the following steps:
1. placing the protection chip on a horizontal desktop, wherein one end of the protection chip is tightly attached to the mark board surface, and the other end of the protection chip is flush with the edge of the horizontal desktop;
2. pushing the protection chip out 1/3 with the length of the protection chip along the horizontal desktop, fixing the chip on the desktop through a fixing plate, and recording the sagging lowest point 1 of the protection chip on a marking plate;
3. recording a contact point T between the edge of the desktop and the marking plate, connecting the contact point with the lowest point 1 of the sag of the protection chip, and measuring an included angle between the connecting line and the horizontal desktop extension line by using a protractor to obtain a test included angle 1;
4. opening the fixing plate, pushing the protective chip out 2/3 with the length of the protective chip along the horizontal desktop, fixing the chip on the desktop through the fixing plate, and recording the sagging lowest point 2 of the protective chip on the mark plate;
5. connecting the contact point T with the lowest sagging point 2 of the protection chip, and measuring an included angle between the connecting line and the extension line of the horizontal desktop by using a protractor to obtain a test included angle 2;
note: when the test included angle 1 is larger than or equal to 30 degrees and the test included angle 2 is larger than or equal to 60 degrees, the softness test is met.
Advantageous effects
1. According to the novel-structure bulletproof vest chip provided by the invention, the optimal protective performance of the existing protective material is utilized to the greatest extent in structure, the number of meaningless fiber cloth layers is reduced, the weight of the chip is reduced, the bulletproof chip meets the requirement of light weight, the excellent protective performance of the bulletproof chip is ensured, the excellent flexibility is ensured, the production cost is reduced, the novel-structure bulletproof vest chip is suitable for large-scale industrial production, and the requirement of the international market is better met;
2. according to the novel-structure bulletproof vest chip, the gradient structure design is adopted, and the synergistic effect among different fiber cloth layers is fully utilized, so that each fiber layer can fully respond at different stages of a ballistic process, and the optimization of a bulletproof effect is achieved;
3. according to the novel-structure bulletproof vest chip, the modified resin adhesive is used for interlayer bonding, the traditional fixing modes such as four-point fixing, two-point fixing and the like are abandoned, so that the bonding performance between the same fiber layers and the bonding performance between different fiber layers are more excellent, the bonding force is not so strong on the premise of ensuring the enough bonding performance, the adhesive can disperse energy in the impact process of a bullet, the buffering effect is achieved, and the bulletproof performance is further enhanced; meanwhile, the bonding force is not weak, so that slippage and dislocation between the same fiber layers and different fiber layers can be avoided, the wearing comfort is obviously enhanced, and the bulletproof performance is more excellent;
4. the method for testing the softness of the bulletproof chip with the novel structure, provided by the invention, is simple, the test is convenient and easy, the cost is low, the test result can describe the softness of the bulletproof chip material closely and comprehensively, the method has high consistency with the subjective evaluation of a wearer, and the popularization and the application of comfortable bulletproof clothes are facilitated.
Drawings
FIG. 1 is a hierarchical block diagram of a new structural body armor core panel structure of the present invention;
fig. 2 is a schematic diagram of a softness test of the novel structural body armor chip of the invention.
Detailed Description
The following examples are intended to further illustrate the invention and are intended to be part, but not all, of the examples herein. Based on the embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without any creative efforts shall fall within the protection scope of the present invention.
Example 1
Dissolving 325g of urea-formaldehyde resin into 3250ml of tetrahydrofuran solution, mechanically stirring at the rotating speed of 160r/min, and obtaining urea-formaldehyde resin dispersion after 20 min; adding 15g of silane coupling agent KH-550 into urea-formaldehyde resin dispersion liquid, mechanically stirring for 8min at the rotating speed of 350r/min, then adding 40g of aluminum sulfate, 10g of bentonite and 45g of microcrystalline paraffin, continuously mechanically stirring for 20min at the rotating speed of 950r/min, simultaneously dispersing for 30min by using ultrasound, wherein the ultrasonic power is 200W, and the frequency is 50KHz, thus obtaining modified urea-formaldehyde resin mixed liquid; adding 30g of beta-methyl propoxide and 35g of polymethyl methacrylate into the modified urea-formaldehyde resin mixed solution, and mechanically stirring for 70min at the rotating speed of 600r/min to obtain a precursor of the modified urea-formaldehyde resin adhesive; and placing the precursor of the modified urea-formaldehyde resin adhesive in an oven at 80 ℃ for 2h to obtain the modified urea-formaldehyde resin adhesive.
Selecting 2 layers of PBO fiber woven fabric, 1 layer of aramid fiber woven fabric, 1 layer of high-strength nylon fiber laid fabric, 13 layers of aramid fiber laid fabric and 1 layer of EVA (ethylene vinyl acetate), then carrying out lamination combination on the materials of each layer according to the structure of PBO fiber woven fabric-aramid fiber woven fabric-high-strength nylon fiber laid fabric-aramid fiber laid fabric-EVA, uniformly coating a modified urea-formaldehyde resin adhesive between each contact surface for bonding, placing the bonded materials at 130 ℃ for drying for 4 hours to obtain a protective layer of the novel-structure bullet-proof vest chip, and then carrying out edge sealing and packaging on the protective layer by using a waterproof sleeve to obtain the novel-structure bullet-proof vest chip.
Example 2
Dissolving 315g of urea-formaldehyde resin into 3150ml of tetrahydrofuran solution, mechanically stirring at the rotating speed of 150r/min for 25min to obtain urea-formaldehyde resin dispersion; adding 25g of silane coupling agent KH-550 into urea-formaldehyde resin dispersion liquid, mechanically stirring for 7min at the rotating speed of 450r/min, then adding 50g of aluminum sulfate, 15g of bentonite and 30g of microcrystalline paraffin, continuously mechanically stirring for 30min at the rotating speed of 800r/min, simultaneously dispersing for 30min by using ultrasound, wherein the ultrasonic power is 200W, and the frequency is 50KHz, thus obtaining modified urea-formaldehyde resin mixed liquid; adding 40g of beta-methyl propoxide and 25g of polymethyl methacrylate into the modified urea-formaldehyde resin mixed solution, and mechanically stirring for 80min at the rotating speed of 700r/min to obtain a precursor of the modified urea-formaldehyde resin adhesive; and placing the precursor of the modified urea-formaldehyde resin adhesive in a 75 ℃ oven for 3h to obtain the modified urea-formaldehyde resin adhesive.
Selecting 3 layers of aramid woven fabric, 2 layers of high-strength polyamide fiber laid fabric, 12 layers of aramid laid fabric and 1 layer of EVA, then carrying out lamination combination on the materials of each layer according to the structure of the aramid woven fabric, the high-strength polyamide fiber laid fabric, the aramid laid fabric and the EVA, uniformly coating a modified urea-formaldehyde resin adhesive between each contact surface for bonding, placing the bonded materials in 140 ℃ for drying for 3 hours to obtain a protective layer of the novel-structure bullet-proof vest chip, and then carrying out edge sealing and packaging on the protective layer by using a waterproof sleeve to obtain the novel-structure bullet-proof vest chip.
Example 3
Dissolving 340g of urea-formaldehyde resin into 3400ml of tetrahydrofuran solution, mechanically stirring at the rotating speed of 180r/min, and obtaining urea-formaldehyde resin dispersion after 15 min; adding 20g of silane coupling agent KH-550 into urea-formaldehyde resin dispersion liquid, mechanically stirring for 10min at the rotating speed of 400r/min, then adding 45g of aluminum sulfate, 5g of bentonite and 35g of microcrystalline paraffin, continuously mechanically stirring for 25min at the rotating speed of 900r/min, and simultaneously dispersing for 30min by using ultrasound, wherein the ultrasonic power is 200W, and the frequency is 50KHz, so as to obtain modified urea-formaldehyde resin mixed liquid; adding 25g of beta-methyl propoxide and 30g of polymethyl methacrylate into the modified urea-formaldehyde resin mixed solution, and mechanically stirring for 85min at the rotating speed of 750r/min to obtain a precursor of the modified urea-formaldehyde resin adhesive; and placing the precursor of the modified urea-formaldehyde resin adhesive in a 70 ℃ oven for 2.5 hours to obtain the modified urea-formaldehyde resin adhesive.
Selecting 1 layer of PBO fiber woven fabric, 2 layers of aramid fiber woven fabric, 3 layers of high-strength nylon fiber laid fabric, 11 layers of aramid fiber laid fabric and 1 layer of EVA (ethylene-vinyl acetate), then carrying out lamination combination on the materials of each layer according to the structure of PBO fiber woven fabric-aramid fiber woven fabric-high-strength nylon fiber laid fabric-aramid fiber laid fabric-EVA, uniformly coating a modified urea-formaldehyde resin adhesive between each contact surface for bonding, placing at 120 ℃ after bonding, drying for 5 hours to obtain a protective layer of the novel-structure bullet-proof vest chip, and then carrying out edge sealing and packaging on the protective layer by using a waterproof sleeve to obtain the novel-structure bullet-proof vest chip.
Note: the fiber cloth of the above examples was 40cmx40cm in all specifications, not specifically described.
Effect verification
The new structural body armor chips obtained in example 1, example 2 and example 3 were subjected to surface density, softness and ballistic performance tests, respectively, and the test results are shown in table 1.
Table 1: novel structure body armor chip test result
Figure BSA0000256927300000061
Note: the bulletproof performance test is strictly carried out according to the NIJ 0101.06 IIIA-level body armor test standard of the department of justice of America, and the test is carried out by using a 15.6g Mark quality Maginan semi-armor hollow pointed bullet (.44), the dent value is required to be less than 44mm, and more international market customers require the dent value to be less than 40 mm.
According to the test results in table 1, the bulletproof vest chip with small surface density, small impact depression value and high softness can be obtained by optimizing the structure of the bulletproof vest chip and bonding the fiber cloth layers by using the modified urea-formaldehyde resin adhesive, and the bulletproof performance meets the NIJ 0101.06 IIIA-level bulletproof vest standard of the United states department of justice, is superior to the standard and the requirements of the international market, and meets the performance index requirements of light weight and comfort.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. A novel structural body armor chip and a softness testing method are characterized in that: a novel structural bullet-proof vest chip comprises a protective layer and a waterproof jacket, wherein the protective layer consists of a bullet-proof layer and a buffer layer. The bulletproof layer is formed by compounding multiple layers of fiber cloth, and is formed by sequentially arranging a poly-p-phenylene benzobisoxazole fiber woven fabric (PBO fiber woven fabric), an aramid fiber woven fabric, a high-strength polyamide fiber non-woven fabric and an aramid fiber non-woven fabric from a bullet hitting surface to the inside; the buffer layer is made of high foaming ethylene-vinyl acetate foam (EVA).
2. A new structural body armor panel of claim 1 wherein: the PBO fiber woven fabric comprises 0-2 layers, the aramid fiber woven fabric comprises 1-3 layers, the high-strength polyamide fiber laid fabric comprises 1-3 layers, the aramid fiber laid fabric comprises 10-14 layers, and the EVA is 1 layer.
3. A new structural body armor panel of claim 1 wherein: preferably, the PBO fiber woven fabric is 2 layers, the aramid fiber woven fabric is 1-2 layers, the high-strength polyamide fiber laid fabric is 2 layers, the aramid fiber laid fabric is 11-12 layers, and the EVA is 1 layer.
4. A new structural body armor panel of claim 1 wherein: further, modified urea-formaldehyde resin adhesives are used for bonding between the bulletproof layer and the buffer layer, between the same fiber cloth layers and between different fiber cloth layers, the bulletproof layer and the buffer layer are placed at 120-150 ℃ after bonding, drying is carried out for 3-5 hours, the protective layer of the bulletproof vest chip with the novel structure is obtained, and then the protective layer is subjected to edge sealing and packaging by using a waterproof sleeve, so that the bulletproof vest chip with the novel structure is obtained.
5. A new structural body armor panel of claim 4 wherein: the preparation method of the modified urea-formaldehyde resin adhesive comprises the following steps: urea formaldehyde resin, aluminum sulfate, beta-methyl propoxide, polymethyl methacrylate, microcrystalline paraffin, a silane coupling agent KH-550 and bentonite are respectively weighed according to the mass ratio of 60-70: 8-10: 5-10: 3-5: 1-3; dissolving urea-formaldehyde resin into a tetrahydrofuran solution according to a mass-to-volume ratio (g: ml) of 1: 10, and mechanically stirring at a rotating speed of 100-200 r/min for 10-30 min to obtain a urea-formaldehyde resin dispersion liquid; adding a silane coupling agent KH-550 into a urea-formaldehyde resin dispersion liquid, mechanically stirring for 5-10 min at the rotating speed of 300-500 r/min, then adding aluminum sulfate, bentonite and microcrystalline paraffin, continuously mechanically stirring for 20-30 min at the rotating speed of 800-1000 r/min, and simultaneously dispersing for 30min by using ultrasound, wherein the ultrasonic power is 200W, and the frequency is 50KHz, so as to obtain a modified urea-formaldehyde resin mixed liquid; adding beta-methyl propoxide and polymethyl methacrylate into the modified urea-formaldehyde resin mixed solution, and mechanically stirring for 60-90 min at the rotating speed of 500-800 r/min to obtain a modified urea-formaldehyde resin adhesive precursor; and placing the precursor of the modified urea-formaldehyde resin adhesive in an oven at 70-80 ℃ for 2-3 h to obtain the modified urea-formaldehyde resin adhesive.
6. A new structural body armor panel of claim 1 wherein: on the basis of providing a novel structure body armor chip, a method for testing the softness of the novel structure body armor chip is also provided.
7. The method for testing the softness of the novel structural body armor chip of claim 6, wherein: the method for testing the softness of the novel structural body armor chip specifically comprises the following steps: (1) placing the protection chip on a horizontal desktop, wherein one end of the protection chip is tightly attached to the mark board surface, and the other end of the protection chip is flush with the edge of the horizontal desktop; (2) pushing the protection chip out 1/3 with the length of the protection chip along the horizontal desktop, fixing the chip on the desktop through a fixing plate, and recording the sagging lowest point 1 of the protection chip on a marking plate; (3) recording a contact point T between the edge of the desktop and the marking plate, connecting the contact point with the lowest point 1 of the sag of the protection chip, and measuring an included angle between the connecting line and the horizontal desktop extension line by using a protractor to obtain a test included angle 1; (4) opening the fixing plate, pushing the protective chip out 2/3 with the length of the protective chip along the horizontal desktop, fixing the chip on the desktop through the fixing plate, and recording the sagging lowest point 2 of the protective chip on the mark plate; (5) and connecting the contact point T with the lowest point 2 of the sag of the protection chip, and measuring an included angle between the connecting line and the extension line of the horizontal desktop by using a protractor to obtain a test included angle 2.
8. The method for testing the softness of the novel structural body armor chip of claim 7, wherein: when the test included angle 1 is larger than or equal to 30 degrees and the test included angle 2 is larger than or equal to 60 degrees, the softness test is met.
CN202111336669.4A 2021-11-12 2021-11-12 Novel-structure body armor chip and softness testing method Pending CN114061374A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024098422A1 (en) * 2022-11-11 2024-05-16 北京航天凯恩新材料有限公司 Lightweight and comfortable bulletproof and stab-proof garment and manufacturing method therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024098422A1 (en) * 2022-11-11 2024-05-16 北京航天凯恩新材料有限公司 Lightweight and comfortable bulletproof and stab-proof garment and manufacturing method therefor

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