KR101981286B1 - Member for curved ballistic shield and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a curved surface bulletproof shield member and a manufacturing method thereof. According to one embodiment, the curved surface bulletproof shield member comprises: a base layer having a curved surface; and a polyurea coating layer formed on a surface of the base layer. The base layer comprises a fiber matrix layer, a first adhesive layer formed on both surfaces of the fiber matrix layer, and a metal sheet layer formed on a surface of the first adhesive layer. The fiber matrix layer is formed by pressurizing a fiber sheet layer including ultra-high molecular weight polyethylene (UHMWPE) fiber and a laminate manufactured by laminating two or more unit sheets including a second adhesive layer formed on one surface of the fiber sheet layer. Therefore, an objective of the present invention is to provide the manufacturing method of a curved surface bulletproof shield member having excellent lightweight, water resistance, and light resistance.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved anti-bullet shield member,

The present invention relates to a member for a curved anti-bullet shield and a method of manufacturing the same.

The bulletproof material is intended to be worn on the body or attached to the structure to protect the body or the structure from the bullet and the debris, and is generally produced by laminating a plurality of panels woven with aramid fibers or high density ethylene fibers.

The above-mentioned bulletproof material is manufactured in the form of a jacket to protect only the concentrated parts of important organs of the body. However, these jackets were not able to fully defend the enemy 's attack because they were vulnerable to attack by other body parts except for the body part.

On the other hand, modern infantry tactical weapons carry guns (personal firearms), grenades, grenade launchers, cremora, pistols and bayonets. Since most of the infantry combat operations are attack weapons that strike the batting point, it was difficult to defend the attack through these tactical weapons with only the armor worn as a defense.

Therefore, a bulletproof shield is being developed to protect the entire body in such a combat situation. The bulletproof shield is required to have lightweight properties for carrying along with a bulletproof property that easily absorbs kinetic energy such as bullet-hole at the time of projecting. In addition, when the surface of the bulletproof shield is exposed to ultraviolet rays and moisture, the efficiency of the bulletproofing due to deterioration may be lowered, and a technique for preventing the bulletproof shield is required.

BACKGROUND ART [0002] The background art relating to the present invention is disclosed in Korean Patent Laid-Open Publication No. 2017-0068335 (published on June 19, 201, entitled "Bulletproof Shield").

One object of the present invention is to provide a method of manufacturing a curved anti-bullet shield member having excellent lightweight, water resistance and light resistance.

Another object of the present invention is to provide a method of manufacturing a curved anti-bullet shield member capable of minimizing surface defects.

Another object of the present invention is to provide a method of manufacturing a curved anti-bullet shield member having excellent corrosion resistance, abrasion resistance and impact resistance.

It is still another object of the present invention to provide a method for manufacturing a curved anti-bullet shield member which easily absorbs the kinetic energy of the bullet and the debris when it is piled, and has excellent bulletproof performance.

It is still another object of the present invention to provide a curved anti-personnel shield member made by the method for manufacturing the curved anti-personnel shield member.

One aspect of the present invention relates to a member for a curved anti-bullet shield. In one embodiment, the curved anti-personnel shield member comprises a substrate layer having a curved surface; And a polyurea coating layer formed on a surface of the base layer, wherein the base layer includes a fiber matrix layer, a first adhesive layer formed on both surfaces of the fiber matrix layer, and a metal sheet formed on a surface of the first adhesive layer, Wherein the fiber matrix layer comprises a laminate made by laminating two or more unit sheets comprising a fiber sheet layer containing ultrahigh molecular weight polyethylene (UHMWPE) fibers and a second adhesive layer formed on one side of the fiber sheet layer Wherein the polyurea coating layer is formed by applying and curing a polyurea coating agent on the surface of the substrate layer, wherein the polyurea coating agent comprises 50 to 70% by weight of a prepolymer and 30 to 70% by weight of a first isocyanate compound 30 To 50% by weight of the first mixture; And a second mixture comprising 60 to 75% by weight of a first polyol, 20 to 35% by weight of an amine compound and 0.1 to 8% by weight of a triazine light stabilizer, Wherein the amine compound comprises an amine-terminated polyether and an amine chain extender, the first mixture and the second mixture are present in a weight ratio of 1: 0.2 to 1: 3 do.

In one embodiment, the thickness of the polyurea coating layer is 0.01 to 10 mm, the thickness of the first adhesive layer is 0.01 to 5 mm, and the thickness of the metal sheet layer is 0.01 to 8 mm.

In one embodiment, the prepolymer can be prepared by reacting the second polyol and the second diisocyanate compound in a weight ratio of 1: 0.5 to 1: 2.

In one embodiment, the amine-based compound may comprise from 40 to 80 wt% amine-terminated polyether and from 20 to 60 wt% amine-chain extender.

In one embodiment the triazine based light stabilizer is selected from the group consisting of 2- (2-hydroxy-4-methoxyphenyl) -4,6-diphenyl-1,3,5-triazine, 6,6 ' Bis (3 - ((2-ethylhexyl) oxy) phenol), 2,4-di [(1,1'- Biphenyl] -4-yl) -6- (4 - ((2-ethylhexyl) oxy) 2- (4-r (2-hydroxy-3- (2-ethyl) (2,4-dimethylphenyl) -1,3,5-triazine and 2,4-bis (2-hydroxy-4-butyloxy) Phenyl) -6- (2,4-bis-butyloxyphenyl) -1,3,5-triazine.

Another aspect of the present invention relates to a method of manufacturing the curved anti-personnel shield member. In one embodiment, the method of manufacturing the curvate bulletproof shield member comprises laminating two or more unit sheets including a fiber sheet layer containing ultrahigh molecular weight polyethylene (UHMWPE) fibers and a second adhesive layer formed on one side of the fiber sheet layer Producing a laminate; Pressing the laminate to produce a fiber matrix having a curved surface; Forming a first adhesive layer on both surfaces of the fiber matrix and laminating a metal sheet layer on the surface of the first adhesive layer to produce an intermediate molded body; And forming a polyurea coating layer by applying and curing a polyurea coating agent on the surface of the intermediate molded body, wherein the polyurea coating agent comprises 50 to 70% by weight of a prepolymer and 30 to 70% by weight of a first isocyanate compound, 50% by weight; And a second mixture comprising 60 to 75% by weight of a first polyol, 20 to 35% by weight of an amine compound and 0.1 to 8% by weight of a triazine light stabilizer, Wherein the amine compound comprises an amine-terminated polyether and an amine chain extender, the first mixture and the second mixture are present in a weight ratio of 1: 0.2 to 1: 3 do.

In one embodiment, the pressurization may be carried out at a temperature of 100-180 ° C. and a pressure of 200-1000 kPa.

In one embodiment, the first adhesive layer and the second adhesive layer may each comprise at least one of ethylene-vinyl acetate, polyethylene, polyurethane, and polypropylene.

In one embodiment, the laminate may be manufactured by stacking 50 to 100 unit sheets.

In one embodiment, the amine-based compound may comprise from 40 to 80 wt% amine-terminated polyether and from 20 to 60 wt% amine-chain extender.

The curved anti-bullet shield member according to the present invention is excellent in light weight, water resistance and light resistance, minimizes surface defects such as cracks on the curved surface, has excellent corrosion resistance, abrasion resistance and impact resistance, The kinetic energy is easily absorbed and the bulletproof performance can be excellent.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a method of manufacturing a curved anti-personnel shield member according to one embodiment of the present invention.
2 shows a laminate according to one embodiment of the present invention.
3 is a cross-sectional view of a curved anti-personnel shield member according to one embodiment of the present invention.
4 is a perspective view of a curved anti-bullet shield made using the curved anti-personnel shield member of the present invention.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to be exemplary, self-explanatory, allowing for equivalent explanations of the present invention.

In the present specification, "upper" and "lower" are defined with reference to the drawings, and "upper" may be changed to "lower" and "lower" to "upper" depending on the viewpoint.

Method for manufacturing curved anti-bullet shield member

Another aspect of the present invention relates to a method of manufacturing the curved anti-personnel shield member. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a method of manufacturing a curved anti-personnel shield member according to one embodiment of the present invention. Referring to FIG. 1, the method for manufacturing a curved anti-

(S10) a laminate manufacturing step; (S20) fabricating a fiber matrix; (S30) intermediate mold forming step; And (S40) forming a polyurea coating layer. More specifically, the curvate bulletproof shield member manufacturing method comprises the steps of: (S10) forming a unit sheet including a fiber sheet layer containing ultrahigh molecular weight polyethylene (UHMWPE) fibers and a second adhesive layer formed on one surface of the fiber sheet layer, Laminating to produce a laminate; (S20) pressing the laminate to produce a fiber matrix having a curved surface; (S30) forming a first adhesive layer on both surfaces of the fiber matrix, and laminating a metal sheet layer on the surface of the first adhesive layer to produce an intermediate molded body; And (S40) coating and curing a polyurea coating agent on the surface of the intermediate molded body to form a polyurea coating layer, wherein the polyurea coating agent comprises 50 to 70% by weight of a prepolymer and 50 to 70% by weight of a first isocyanate A first mixture comprising from 30 to 50% by weight of a compound; And a second mixture comprising 60 to 75% by weight of a first polyol, 20 to 35% by weight of an amine compound and 0.1 to 8% by weight of a triazine light stabilizer, Wherein the amine compound comprises an amine-terminated polyether and an amine chain extender, the first mixture and the second mixture are present in a weight ratio of 1: 0.2 to 1: 3 do.

Hereinafter, a method for manufacturing a curved anti-personnel shield member according to the present invention will be described in detail.

(S10) The laminate  Manufacturing stage

This step is a step of preparing a laminate having a curved surface by laminating two or more unit sheets including a fiber sheet layer containing ultrahigh molecular weight polyethylene (UHMWPE) fibers and an adhesive layer formed on one side of the fiber sheet layer.

2 shows a laminate according to one embodiment of the present invention. 2, the laminate 20 includes a fiber sheet layer 10 including ultrahigh molecular weight polyethylene (UHMWPE) fibers and a second adhesive layer 12 formed on one surface of the fiber sheet layer 10 A plurality of sheets 14 are laminated.

In one embodiment, the ultra-high molecular weight polyethylene fibers may have a circular or elliptical cross section. In one embodiment, the ultra high molecular weight polyethylene (UHMWPE) fiber may have a weight average molecular weight of 300,000 g / mol or more. The abrasion resistance, the thermal stability and the bulletproof property can be excellent in the molecular weight range. For example, a weight average molecular weight of 300,000 to 5,000,000 g / mol.

In one embodiment, the ultra high molecular weight polyethylene (UHMWPE) fiber has a density of 0.95 g / cm ³ or less, for example 0.93 g / cm ³ ≪ / RTI > In this range, it is excellent in light weight and may be suitable for use as a curved anti-bullet shield member for marine use.

In one embodiment, the ultrahigh molecular weight polyethylene (UHMWPE) fiber of the fibrous sheet layer can be 100 to 30000 denier. In the present specification, the term "denier" refers to the thickness of the fiber, which is defined as 1 denier when the length of the fiber 9000 m is 1 g. In this range, the bulletproof effect can be excellent.

2, the fibrous sheet layer of the unit sheet and the second adhesive layer of the unit sheet immediately adjacent to the unit sheet may be in contact with each other. Further, the uppermost layer in the lamination may come in contact with the second adhesive layers of the unit sheet, and the fiber sheet layer may be exposed at the uppermost portion.

In one embodiment, the laminate 20 may be manufactured by stacking 50 to 100 unit sheets 14. For example, 80 to 90 laminated layers. It is possible to prevent the phenomenon that the bulletproof effect is excellent and the weight is excessively increased in the laminated water.

In one embodiment, the unit sheet layer may be formed by arranging ultra high molecular weight polyethylene fibers in one direction.

In one embodiment, the lamination can laminate the fiber orientations of adjacent fiber sheet layers in the same direction (0 degree angle). In other embodiments, the stack may be stacked so that the fiber orientation of adjacent fiber sheet layers is at an angle of 90 degrees. As described above, the cross-lamination bulletproof property can be excellent.

In one embodiment, the second adhesive layer may comprise one or more of ethylene-vinyl acetate, polyethylene, polyurethane and polypropylene. When the second adhesive layer is applied, the adhesive strength can be excellent.

For example, the second adhesive layer may be formed by applying the above-described components to the surface of the fibrous sheet layer to form a second adhesive layer, or to adhere to the surface of the fibrous sheet layer in the form of a film containing the component have.

(S20) Fabric Matrix Fabrication Step

The step is a step of pressing the laminate to produce a fiber matrix having a curved surface. In one embodiment, the laminate is put into an autoclave, and then heated and pressurized to produce a fiber matrix having a curved surface.

Referring to FIG. 2, in one embodiment, a laminate having a curved surface is manufactured, and then a fiber matrix having a curved surface can be produced by pressurization in an autoclave. As another example, a planar laminate may be manufactured, and then molded to have a curved shape.

In one embodiment, the pressurization may be carried out at a temperature of 100-180 ° C. and a pressure of 200-1000 kPa. Under the above conditions, the mechanical strength and the bulletproof property of the fiber matrix can be excellent.

In one embodiment, the fiber matrix can be produced and then cut into a predetermined shape using a water jet process or the like. The fiber matrix may then be dried to remove moisture.

(S30) Intermediate molding  Manufacturing stage

In this step, a first adhesive layer is formed on both surfaces of the fiber matrix, and a metal sheet layer is laminated on the surface of the first adhesive layer to produce an intermediate molded body having a curved surface.

In one embodiment, the first adhesive layer may comprise one or more of ethylene-vinyl acetate, polyethylene, polyurethane, and polypropylene. When the first adhesive layer is applied, the adhesion strength can be excellent. For example, the first adhesive layer may be formed by applying the above-described components to both surfaces of the fiber matrix to form a first adhesive layer, or to adhere to both surfaces of the fiber matrix in the form of a film containing the component have.

In one embodiment, the metal sheet layer may comprise aluminum. When aluminum is included, the light weight and bulletproof property can be excellent.

(S30) Polyurea  Coating layer formation step

This step is a step of applying and curing a polyurea coating agent on the surface of the intermediate molded body having the curved surface to form a polyurea coating layer. The polyurea coating layer is formed for the purpose of ensuring the water resistance, abrasion resistance and light resistance of the curvate bulletproof shield member of the present invention.

Wherein the polyurea coating agent comprises a first mixture comprising 50 to 70% by weight of a prepolymer and 30 to 50% by weight of a first isocyanate compound; And a second mixture comprising 60 to 75 wt% of the first polyol, 20 to 35 wt% of the amine compound, and 0.1 to 8 wt% of the triazine light stabilizer.

Hereinafter, the polyurea coating agent will be described in more detail.

The first mixture

The first mixture comprises 50 to 70% by weight of a prepolymer and 30 to 50% by weight of a first isocyanate compound.

In one embodiment, the prepolymer is prepared by reacting a second polyol and a second isocyanate compound. Both ends of the prepolymer are capped with an isocyanate group (NCO < - >) and can react with the amine compound.

In one embodiment, the reaction of the second polyol and the second diisocyanate compound can be carried out in a conventional manner. For example, in a solvent. As another example, the second polyol and the second diisocyanate compound may be reacted without a solvent in the presence of a catalyst. As the catalyst, a tertiary amine, an aprotic salt, or an organometallic compound may be used. For example, the second polyol and the second diisocyanate compound may be added to a reactor and reacted at 50 to 100 ° C for 1 to 15 hours.

For example, the prepolymer may be prepared by reacting the second polyol and the second diisocyanate compound at a weight ratio of 1: 0.5 to 1: 2. The polyurea coating layer having excellent reactivity and excellent mechanical strength and water resistance can be easily formed when the prepolymer is reacted in the weight ratio condition.

In one embodiment, the prepolymer may have an NCO-group content of 0.5 to 15% by weight. Under the above conditions, a polyurea coating layer excellent in reactivity and excellent in hardness, mechanical strength and water resistance can be easily formed at the time of preparing the prepolymer.

For example, the second polyol having a number average molecular weight (Mn) of 1,500 to 5,000 g / mol can be used. The polyurea coating layer may have excellent mechanical strength under the above number average molecular weight conditions.

In one embodiment, the second polyol may include at least one of a polyolefin polyol, a polyester polyol, a polycaprolactone polyol, a polyether polyol, and a polycarbonate polyol. The polyolefin polyol may include at least one of a polyether polyol and a polypropylene polyol. For example, a polyether polyol.

For example, the second diisocyanate compound may have a number average molecular weight (Mn) of 100 to 1500 g / mol. The polyurea coating layer may have excellent mechanical strength under the above number average molecular weight conditions.

In one embodiment, the second diisocyanate compound is selected from the group consisting of methylene diphenyl diisocyanate (MDI), toluene-diisocyanate (TDI), phenylene diisocyanate, chlorophenylene- , 4'-diisocyanate, isophorone diisocyanate, cyclohexylmethane diisocyanate, 3-methyldiphenyl-methane-4,4'-diisocyanate, diphenyl ether diisocyanate, ethylene diisocyanate and 1,6-hexamethylene Diisocyanate. ≪ / RTI >

The prepolymer is contained in an amount of 40 to 60% by weight based on the total weight of the first mixture. When the prepolymer is contained in an amount of less than 40% by weight, the mechanical strength of the polyurea coating layer is lowered. When the prepolymer is contained in an amount exceeding 60% by weight, impact resistance may be lowered.

In one embodiment, the first diisocyanate compound may be the same or different from the second diisocyanate compound. For example, the first diisocyanate compound may be at least one compound selected from the group consisting of methylenediphenyl diisocyanate (MDI), toluene-diisocyanate (TDI), phenylene diisocyanate, chlorophenylene-2,4-diisocyanate, Diisocyanate, isophorone diisocyanate, cyclohexylmethane diisocyanate, 3-methyldiphenyl-methane-4,4'-diisocyanate, diphenyl ether diisocyanate, ethylene diisocyanate and 1,6-hexamethylene di Isocyanates. ≪ / RTI >

For example, the first diisocyanate compound may have a number average molecular weight (Mn) of 100 to 1500 g / mol. The polyurea coating layer may have excellent mechanical strength under the above number average molecular weight conditions.

The first diisocyanate compound is contained in an amount of 30 to 50 wt% based on the total weight of the first mixture. When the amount of the first diisocyanate compound is less than 30% by weight, the polyurea coating layer is not cured, its heat resistance or mechanical strength is lowered, and if it exceeds 50% by weight, the mechanical strength such as impact resistance may be lowered .

The second mixture

The second mixture comprises 60 to 75 wt% of the first polyol, 20 to 35 wt% of the amine compound, and 0.1 to 8 wt% of the triazine light stabilizer.

The first polyol may include at least one of a polyolefin polyol, a polyester polyol, a polycaprolactone polyol, a polyether polyol, and a polycarbonate polyol. The polyolefin polyol may include at least one of a polyether polyol and a polypropylene polyol. For example, a polyether polyol.

The first polyol is contained in an amount of 60 to 75% by weight based on the total weight of the second mixture. When the first polyol is contained in an amount of less than 60% by weight, mechanical strength is lowered. When the first polyol is contained in an amount exceeding 75% by weight, uncured curing of the polyurea coating layer may occur.

The singly amine-based compound can react with the prepolymer to form a polyurea bond. In one embodiment, the amine-based compound comprises an amine-terminated polyether and an amine chain extender.

The amine terminated polyether may have a number average molecular weight of 1000 g / mol or more. For example greater than 2000 g / mol. Other examples may be 2000-6000 g / mol. Under the above conditions, the reaction efficiency of the polyurea coating agent and the mechanical properties of the coating layer can be excellent.

For example, the amine-terminated polyether may comprise a divalent or higher amine-terminated polyether. The amine chain extender can control the curing reaction to secure a pot life and improve mechanical properties such as elongation and hardness of the polyurea coating layer. For example, the amine chain extender may comprise a primary amine monomer or a divalent amine monomer.

In one embodiment, the amine-based compound may comprise from 40 to 80 wt% amine-terminated polyether and from 20 to 60 wt% amine-chain extender. Within the above ranges, the curing reaction efficiency of the polyurea coating agent of the present invention and the mechanical properties of the coating layer can be excellent. For example, from 60 to 80% by weight of an amine-terminated polyether and from 20 to 40% by weight of an amine chain extender.

The amine compound is contained in an amount of 20 to 35% by weight based on the total weight of the second mixture. When the amine compound is contained in an amount less than 20% by weight, the mechanical strength of the polyurea coating layer is lowered, and when the amine compound is contained in an amount exceeding 35% by weight, the hardness can be excessively improved.

The triazine-based light stabilizer is included for the purpose of preventing the phenomenon that the polyurea coating layer of the present invention is discolored, deteriorated or decomposed by ultraviolet rays or the like.

The triazine based light stabilizer may be selected from the group consisting of 2- (2-hydroxy-4-methoxyphenyl) -4,6-diphenyl-1,3,5-triazine, 6,6 ' Phenyl) -1,3,5-triazine-2,4-diyl) bis (3 - ((2-ethylhexyl) oxy) phenol) 4-yl) -6- (4- ((2-ethylhexyl) oxy) -2-methylphenyl-1,3,5-triazine, 2- (2-hydroxy-3- (2-ethyl) hexyl) oxy] phenyl] -4,6- (2,4-dimethylphenyl) -1,3,5-triazine and 2,4-bis (2-hydroxy-4-butyloxyphenyl) -6 - (2,4-bis-butyloxyphenyl) -1,3,5-triazine.

The triazine based light stabilizer is contained in an amount of 0.1 to 8 wt% based on the total weight of the second mixture. When the triazine-based light stabilizer is contained in an amount of less than 0.1% by weight, the effect is insignificant, and when it exceeds 8% by weight, the mechanical strength of the polyurea coating layer may be lowered. For example, 0.1% by weight to 5% by weight.

In one embodiment, the first mixture and the second mixture are included in a weight ratio of 1: 0.2 to 1: 3. The polyurethane coating layer can be easily cured within the above weight range, and the coating layer can have excellent mechanical strength and water resistance. When the first mixture contains the second mixture at a weight ratio of less than 1: 0.2, the mechanical strength of the coating layer is lowered, and when the first mixture is contained at a weight ratio of more than 1: 3, the coating layer may not be cured.

A curved anti-bullet shield member

Another aspect of the present invention relates to a curved anti-personnel shield member made by the method for manufacturing a curved anti-personnel shield member.

3 shows a curved anti-personnel shield member according to one embodiment of the present invention. Referring to FIG. 3, the curved anti-personnel shield member 1000 includes a base layer having a curved surface; And a polyurea coating layer 200 formed on the surface of the base layer, wherein the base layer includes a fiber matrix layer 100, a first adhesive layer 110, 112 formed on both surfaces of the fiber matrix layer 100, And a metal sheet layer (120, 122) formed on the surface of the first adhesive layer (110, 112), wherein the fiber matrix layer (100) comprises a fiber sheet layer comprising ultra high molecular weight polyethylene (UHMWPE) Wherein the polyurea coating layer is formed by applying a polyurea coating agent to the surface of the base layer and curing the polyurea coating layer on the surface of the base layer by pressing the laminate prepared by laminating two or more unit sheets including a second adhesive layer formed on one surface of the fiber sheet layer Wherein the polyurea coating agent comprises a first mixture comprising 50 to 70% by weight of a prepolymer and 30 to 50% by weight of a first isocyanate compound; And a second mixture comprising 60 to 75% by weight of a first polyol, 20 to 35% by weight of an amine compound and 0.1 to 8% by weight of a triazine light stabilizer, Wherein the amine compound comprises an amine-terminated polyether and an amine chain extender, the first mixture and the second mixture are present in a weight ratio of 1: 0.2 to 1: 3 do.

The radius of curvature of the curvate bulletproof shield member of the present invention is not particularly limited. Referring to FIG. 3, a curved surface curved convexly in one direction with respect to the cross-sectional surface of the curved anti-tank shield member may be formed.

Since the polyurea coating agent is the same as that described above, a detailed description thereof will be omitted.

In one embodiment, the thickness of the polyurea coating layer is 0.01 to 10 mm, the thickness of the first adhesive layer is 0.01 to 5 mm, and the thickness of the metal sheet layer is 0.01 to 8 mm.

In one embodiment, the prepolymer can be prepared by reacting the second polyol and the second diisocyanate compound in a weight ratio of 1: 0.5 to 1: 2. The polyurea coating layer having excellent reactivity and excellent mechanical strength and water resistance can be easily formed when the prepolymer is reacted in the weight ratio condition.

In one embodiment, the amine-based compound may comprise from 40 to 80 wt% amine-terminated polyether and from 20 to 60 wt% amine-chain extender.

In one embodiment the triazine based light stabilizer is selected from the group consisting of 2- (2-hydroxy-4-methoxyphenyl) -4,6-diphenyl-1,3,5-triazine, 6,6 ' Bis (3 - ((2-ethylhexyl) oxy) phenol), 2,4-di [(1,1'- Biphenyl] -4-yl) -6- (4 - ((2-ethylhexyl) oxy) 2- (4-r (2-hydroxy-3- (2-ethyl) (2,4-dimethylphenyl) -1,3,5-triazine and 2,4-bis (2-hydroxy-4-butyloxy) Phenyl) -6- (2,4-bis-butyloxyphenyl) -1,3,5-triazine.

4 is a perspective view of a curved anti-bullet shield made using the curved anti-personnel shield member of the present invention. Referring to FIG. 4, a window may be provided to puncture at least a part of the curvate bulletproof shield member to secure a field of view of the front surface. Further, a handle may be formed on at least one surface of the bulletproof shield so that the user can grip and support the bulletproof shield.

The curved anti-bullet shield member according to the present invention is excellent in light weight, water resistance and light resistance, minimizes surface defects such as cracks on the curved surface, has excellent corrosion resistance, abrasion resistance and impact resistance, The kinetic energy is easily absorbed and the bulletproof performance can be excellent.

Hereinafter, the structure and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.

The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.

Example  And Comparative Example

(1) the first mixture

(A) prepolymer: A second polymer (polyether polyol) and a second diisocyanate compound (methylenediphenyl diisocyanate) were reacted at a weight ratio of 1: 1 to prepare a prepolymer.

(B) a first isocyanate compound: methylene diphenyl diisocyanate was used.

(2) The second mixture

(A) First polymer: Polyether polyol was used.

(B) amine-based compound: amine-based compound comprising 70% by weight of an amine-terminated polyether (divalent amine-terminated polyether) and 30% by weight of an amine chain extender (divalent amine monomer).

(C) triamine-based light stabilizer, 2,4-di ([1,1'-biphenyl] -4-yl) -6- (4- ((2- ethylhexyl) oxy) , 3,5-triazine was used.

Example  1 and Comparative Example  Manufacture of one to four curved bulletproof shields

A fibrous sheet layer comprising ultra high molecular weight polyethylene (UHMWPE) fibers; And a second adhesive layer (ethylene-vinyl acetate) formed on one side of the fibrous sheet layer were prepared, 86 sheets of the unit sheets were stacked as shown in Fig. 2, Was prepared.

The laminate was put into an autoclave and pressed at a temperature of 100 to 180 ° C and a pressure of 200 to 1000 kPa to prepare a fiber matrix having a curved surface.

A first adhesive layer (polyurethane film) corresponding to the curved surface shape of the fiber matrix is formed on both surfaces of the fiber matrix, and a metal sheet layer (aluminum layer) having a thickness of 0.1 mm is formed on the surface of the first adhesive layer, After forming a molded article, a polyurea coating agent to which the components and contents shown in the following Table 1 were applied was applied and cured to form a polyurea coating layer, thereby manufacturing a curved anti-bullet shield member as shown in FIG. The first mixture and the second mixture were mixed at a weight ratio of 1: 1.

Property evaluation method

(1) Hardness (Shore D): The hardness of the curved surface bulletproof shield members of the above Examples and Comparative Examples was measured using a hardness meter. If the hardness is equal to or greater than Shore D 55, it is determined to be defective. If it is less than 55, it is determined to be defective, and the results are shown in Table 1 below.

(2) Light stability: After the curtain surface shielding member of the above Examples and Comparative Examples were exposed to light for a predetermined period of time, the appearance was observed to observe discoloration or discoloration of the surface, and the result was judged as good or bad, The results are shown in Fig.

(3) Water absorbency: The curvate bulletproof shield members of the examples and comparative examples were measured for water absorption according to ASTM D570. When the water absorption rate is less than 2% by weight, it is determined to be defective. When the water absorption rate is more than 2% by weight, it is determined to be defective.

Referring to Table 1, it can be seen that the curvate bulletproof shield member according to the present invention has excellent mechanical properties such as hardness, light stability and water resistance. However, it was found that the mechanical properties such as hardness, light stability, and water resistance of Comparative Examples 1 to 4, which were outside the conditions of the polyurea coating agent of the present invention, were lower than those of Example 1.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: fiber sheet layer 12: second adhesive layer
14: unit sheet 20: laminate
100: fiber matrix layer 110, 112: first adhesive layer
120, 122: metal sheet layer 200: polyurea coating layer
1000: Surface anti-bullet shield member

Claims (10)

A substrate layer having a curved surface; And
And a polyurea coating layer formed on the surface of the substrate layer,
Wherein the base layer includes a fiber matrix layer, a first adhesive layer formed on both surfaces of the fiber matrix layer, and a metal sheet layer formed on a surface of the first adhesive layer,
Wherein the fiber matrix layer is formed by pressing a laminate produced by laminating two or more unit sheets including a fiber sheet layer containing ultrahigh molecular weight polyethylene (UHMWPE) fibers and a second adhesive layer formed on one side of the fiber sheet layer Lt; / RTI &
The polyurea coating layer is formed by applying and curing a polyurea coating agent on the surface of the substrate layer,
Wherein the polyurea coating agent comprises 60 to 75% by weight of a first mixture comprising 50 to 70% by weight of a prepolymer and 30 to 50% by weight of a first isocyanate compound, 20 to 35% by weight of an amine compound, And 0.1 to 8% by weight of a triazine light stabilizer,
The prepolymer is formed by reacting a second polyol and a second isocyanate compound,
Wherein the amine-based compound comprises an amine-terminated polyether and an amine chain extender,
Wherein the first mixture and the second mixture are contained in a weight ratio of 1: 0.2 to 1: 3.
The polyurethane coating composition according to claim 1, wherein the polyurea coating layer has a thickness of 0.01 to 10 mm,
The thickness of the first adhesive layer is 0.01 to 5 mm,
Wherein the metal sheet layer has a thickness of 0.01 to 8 mm.
The curvate bulletproof shield according to claim 1, wherein the prepolymer is produced by reacting the second polyol and the second diisocyanate compound at a weight ratio of 1: 0.5 to 1: 2.
The curved anti-personnel shield according to claim 1, wherein the amine compound comprises 40 to 80% by weight of an amine-terminated polyether and 20 to 60% by weight of an amine chain extender.
2. The composition of claim 1, wherein the triazine based light stabilizer is selected from the group consisting of 2- (2-hydroxy-4-methoxyphenyl) -4,6-diphenyl-1,3,5- - (4-methoxyphenyl) -1,3,5-triazine-2,4-diyl) bis (3- 4- (2-ethylhexyl) oxy] -2-methylphenyl-1,3,5-triazine, 2- (2-hydroxy- 2- [4 - [(2-hydroxy-3- (2-hydroxy- Hydroxyphenyl] -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine and 2,4-bis (2-hydroxy- Butyloxyphenyl) -6- (2,4-bis-butyloxyphenyl) -1,3,5-triazine.
Preparing a laminate by laminating two or more unit sheets including a fiber sheet layer containing ultrahigh molecular weight polyethylene (UHMWPE) fibers and a second adhesive layer formed on one side of the fiber sheet layer;
Pressing the laminate to produce a fiber matrix having a curved surface;
Forming a first adhesive layer on both surfaces of the fiber matrix and laminating a metal sheet layer on the surface of the first adhesive layer to produce an intermediate molded body; And
Applying and curing a polyurea coating agent on the surface of the intermediate molded body to form a polyurea coating layer,
Wherein the polyurea coating agent comprises a first mixture comprising 50 to 70% by weight of a prepolymer and 30 to 50% by weight of a first isocyanate compound; And a second mixture comprising 60 to 75 wt% of a first polyol, 20 to 35 wt% of an amine compound, and 0.1 to 8 wt% of a triazine light stabilizer,
The prepolymer is formed by reacting a second polyol and a second isocyanate compound,
Wherein the amine-based compound comprises an amine-terminated polyether and an amine chain extender,
Wherein the first mixture and the second mixture are contained in a weight ratio of 1: 0.2 to 1: 3.
7. The method of claim 6, wherein the pressing is performed at a temperature of 100 to 180 DEG C and a pressure of 200 to 1000 kPa.
7. The method of claim 6, wherein the first adhesive layer and the second adhesive layer each comprise at least one of ethylene-vinyl acetate, polyethylene, polyurethane, and polypropylene.
The method according to claim 6, wherein the laminate is produced by laminating 50 to 100 unit sheets.
[7] The method of claim 6, wherein the amine compound comprises 40 to 80% by weight of amine-terminated polyether and 20 to 60% by weight of amine chain extender.

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