KR102070304B1 - Lightweight sandwich panels for military buildings - Google Patents

Abstract

The present invention, bulletproof and explosion-proof functional layer; Strength and heat insulation functional layer on the anti-ballistic and explosion-proof functional layer; Anti-ballistic and security functional layers on the proof strength and thermal insulation functional layers; It is made of a sound-proof functional layer on the anti-ballistic and security functional layer, and the lightweight sandwich panel component, characterized in that the anti-ballistic and explosion-proof functional layer is located at the outermost.
Sandwich panel composition of the present invention is a multi-function of bulletproof and explosion-proof, strength and insulation, security and soundproofing, buildings that must be quickly installed in a harsh environment to perform a variety of functions, military buildings requiring internal protection and security, disaster area There is an effect that can be urgently installed in and used for protection and temporary residence.

Description

Lightweight sandwich panels for military buildings

The present invention relates to lightweight composite sandwich panel constructions for use in military or military buildings or buildings.

Composite materials are generally compounded by mechanical mixing, and reinforcement materials having excellent mechanical properties, and base materials which fix the reinforcement materials so as not to be deformed or moved within a specific space to express the inherent mechanical properties of the reinforcement materials. It is a material with mechanical properties that cannot be exhibited by reinforcement and base alone.

These composites have a long history and are widely applied, ranging from soil bricks mixed with plant stems used thousands of years ago to carbon fiber composites used in aircraft fuselage.

BACKGROUND ART Composite materials employing continuous phase oil, inorganic reinforcing materials and polymer resins as base materials, which are of interest in the present invention, have recently been applied in a wide range of industrial fields, and their applications are expanding. It has excellent mechanical performance and low specific gravity compared to the existing metal or mineral materials, and it is trying to improve energy efficiency and increase the ease of movement and installation by replacing the existing material and reducing the weight of parts and finished products. As a part, the aerospace industry, the wind power generation industry, the machinery industry, the transportation equipment industry, the construction and civil engineering industries have been spotlighted as substitute materials for existing materials.

In addition, since it is a lightweight material having excellent mechanical properties and at the same time excellent heat insulating performance, the movement to apply as a new material to reduce energy consumption by applying to the building structure has been started. In order to use as a building material, it is required to have excellent mechanical properties to satisfy structural functionality and to prevent heat loss due to temperature difference between the inside and outside of the building. Sandwich panel constructions based on functional plates with physical properties can be manufactured and used.

It is known that the basic mechanical properties of the sandwich panel components can be expressed as the main variables of the mechanical properties of the skin material and the distance to the other skin material bonded through the core material. This is a concept similar to that in the steel I-beam or H-beam, the mechanical properties of copper steel are determined by the configuration of flange and web. In other words, the mechanical properties represented by the material, thickness, width, etc. of the flange portion in the shape steel and the distance between the flanges facing each other by the web to work together to define the mechanical properties of the copper steel. Thus, in sandwich panel constructions, the distance between the skin material, expressed in terms of the mechanical properties of the skin material and the thickness of the core material, is a major factor in the mechanical properties of the entire sandwich panel.

Functionally, the characteristics of the skin and core material can be expressed as the properties of the sandwich panel composition, and the sandwich panel composition based on the composite material with excellent mechanical properties as the skin material and the functional plate material with unique mechanical properties is excellent. Can be used as a building material.

As described above, the sandwich panel component is a material having a very unique function by the combination of the skin and the core, and can be applied to various purposes. Sandwich panel construction as a multifunctional building material of particular interest in the present invention is applicable as a novel material having a wide variety of possibilities.

On the other hand, there are many kinds and purposes of buildings in addition to the general buildings used as the living space for residents. Temporary residential building, not a concept of permanent residence, a building that can be easily established or moved for commercial purposes, a building for storing uninhabited goods, a building for storing various equipment or means of transportation, a kiosk for emergency disaster relief, wallpaper There is a demand for various kinds of buildings according to the use and function, such as easy-to-set buildings and special-purpose buildings, and various solutions are proposed to satisfy these requirements, and sandwich panel components are also proposed as one of these solutions. There is a situation.

In general, sandwich panel components applied to buildings such as kiosks, factories, warehouses, and the like are steel sheet sandwich panels composed of a steel sheet as a skin and a foamed resin sheet as a core. The steel sheet sandwich panel has been applied to many buildings due to the ease of manufacture and excellent mechanical properties. However, the steel plate sandwich panel has a disadvantage in that the construction method is complicated and a large number of seams between the panels is generated because the width of the steel plate used as the skin material is narrow to about 1 m and the subsequent construction of a plurality of panels. In addition, the construction method should be established by fixing the panel to the beam after completion of floor foundation work and the installation of the section steel on the floor. Therefore, heavy equipment for floor foundation construction, concrete pouring equipment for floor foundation, section steel It can be installed only in the area where heavy equipment such as heavy equipment for installation can be accessed, and the concrete pouring process is required, so the construction can not be carried out during the concrete curing period. In addition, the building is constructed of a steel plate sandwich panel composition is applied to a large amount of steel sheet and steel, vulnerable to corrosion, due to the excellent heat transfer characteristics of the metal material is limited thermal insulation between the inside and outside, the internal living environment is not good, There is a fundamental problem that the cost of heating and cooling may be excessive. Due to these drawbacks, it is very difficult to establish a steel plate sandwich panel construction in areas in which transportation is inconvenient and heavy equipment and large vehicles are difficult to access, or in areas where electricity or fuel cannot be supplied smoothly. In other words, when there is an urgent need to establish a building in an area where heavy equipment is difficult to access and difficult to secure energy, such as a desert or jungle, it is easy to transport, the building period is very short, and the function to minimize energy consumption is required. The building materials they had and their buildings were needed. In particular, it is a building that requires functions such as short establishment time, establishment method that does not require special heavy equipment, protection against external shock, minimization of environmental influence such as temperature and precipitation, sound insulation and noise isolation, etc. These include buildings that need to be installed and exert various functions, military buildings that require internal protection and security, and buildings that can be used for emergency and temporary housing in disaster areas.

The present invention seeks to provide a versatile lightweight composite sandwich panel construction that solves the above problems and simplifies existing complex processes. In particular, a lightweight composite multifunctional lightweight composite sandwich panel construction that can be applied to military buildings requiring rapid establishment and dismantling, internal protection and security is disclosed.

Republic of Korea Patent Publication 2016-0128025

The present invention seeks to provide a lightweight multifunctional lightweight composite sandwich panel construction having insulation, interior protection and security functions.

The present invention, bulletproof and explosion-proof functional layer to solve the above problems; Strength and heat insulation functional layer on the anti-ballistic and explosion-proof functional layer; Anti-ballistic and security functional layer on the proof strength and thermal insulation functional layer; And a soundproof functional layer on the anti-ballistic and security functional layer.

According to one embodiment of the invention, the anti-ballistic and explosion-proof functional layer is composed of an outer layer and an inner layer, the outer layer is a fiber-reinforced composite material obtained by impregnating a resin on carbon fiber or glass fiber, the inner layer is on aramid fiber It is characterized in that the fiber-reinforced composite material obtained by impregnating the resin.

According to one embodiment of the invention, the strength and heat insulation functional layer is made of a skin material and a core material, the skin material is a fiber-reinforced composite material in the form of a sheet prepared by applying, impregnating and polymerizing a polymer resin composition on a reinforcing fiber The core material is characterized in that the one selected from the group consisting of a foamed resin plate of a polymer resin, foamed glass, foamed minerals, glass fiber concentrator, mineral fiber concentrator, and a porous sound absorbing material.

According to one embodiment of the invention, the anti-ballistic and security functional layer is composed of a bulletproof functional composite material layer and a security functional composite material layer, the anti-ballistic functional composite material layer is a composite material obtained by impregnating a resin on the aramid fiber fabric Wherein the resin is 10 to 40 parts by weight based on 100 parts by weight of the aramid fiber fabric, and the security functional composite layer is a composite material obtained by impregnating a resin on the carbon fiber fabric. The resin is characterized in that 30 to 200 parts by weight.

According to an embodiment of the present invention, the sound insulation functional layer is composed of a sound absorbing layer and a sound insulating layer, and the sound absorbing layer is a polyester fiber converging plate member having a density of 24 kg / m 3 to 50 kg / m 3, and the sound insulating layer is It is produced by kneading any one kind of thermosetting rubber and polyvinyl chloride and minerals, and has a density of 1.5 g / cm 3 to 2.2 g / cm 3.

Sandwich panel composition of the present invention is a multi-function of bulletproof and explosion-proof, strength and insulation, security and soundproofing, the building must be quickly installed in a harsh environment to perform a variety of functions, military buildings requiring internal protection and security, disaster area There is an effect which can be urgently installed in and used for protection and temporary residence.

In addition, the sandwich panel component of the present invention has the advantage of increasing energy efficiency and increasing ease of movement and installation by reducing the weight of parts and finished products because of the use of lightweight materials.

Hereinafter, the present invention will be described in detail. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the ordinary or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own inventions. Based on principles that can be defined, it should be interpreted as meanings and concepts corresponding to the technical spirit of the present invention.

The lightweight composite sandwich panel component of the present invention has excellent mechanical properties due to its structural characteristics, and thus is a lightweight material that can serve as a skeleton of a building itself, and thus is prepared as a product in which functional materials are mixed in advance in a factory. It is a versatile sandwich panel that is easy to set up and can serve its intended function upon establishment.

The lightweight composite sandwich panel component of the present invention is composed of a soundproof functional layer, a bulletproof and security functional layer, a strength and a thermal insulation functional layer, a bulletproof and an explosion proof functional layer from the inside of the structure, and at the same time performs the strength and thermal insulation function as a basic building The contents of the activities are not transmitted to the outside, but the structure is designed to mitigate the impact of shootings from the outside. If necessary, an outer layer may be added on the sound insulation functional layer.

The soundproof functional layer has a function of preventing the contents of conversations made between personnel working inside the building or the contents of conversations made using a communication network from being detected from the outside. Sound insulation technology can be divided into sound insulation technology that blocks the transmission of sound to prevent sound from passing through a specific layer and sound absorption technology that absorbs the transmitted sound and converts it into kinetic energy or heat energy. The sound insulation material by sound insulation technology is mainly made of high density and hard material in the form of plate. Sound-absorbing material by the sound absorption technology has a porous structure consisting mainly of irregularly arranged fibers, which is processed into a low-density, stretch-like plate material is applied. The vibration energy of the air delivered to the sound absorbing material vibrates the fiber in many holes between the fibers, and is converted into heat of friction by the vibration, so that the energy is absorbed by the sound absorbing material.

The anti-ballistic and security functional layer is a functional layer for protecting personnel operating inside the building from external shocks, especially attacks, and prevents internal information from being detected from the outside. This functional layer has a secondary protective function, in which the external shape that has passed through the first and second forms in the anti-ballistic and explosion-proof functional layer and absorbs energy is added to the anti-ballistic and security functional layer. It has the function of preventing energy from being absorbed and going further inside. In addition, since it forms a very hard layer, it can act as a sound insulation material in addition to the sound insulation functional layer. In particular, it includes a layer having a metal or carbon fiber having electrical conductivity to provide a sound shielding function and a radio wave blocking function at the same time to impart security functionality. Bulletproof function is given by using composite sheet with aramid fiber with very high tensile strength, and sound insulation and radio wave blocking function are applied by composite sheet with carbon fiber which is very hard and electrically conductive. The layers are combined to form a bulletproof and security functional layer.

The load-bearing and heat-insulating functional layer forms a wall, a roof, etc. of the building to maintain the shape of the structure, and has a function of minimizing the influence of the interior of the building due to temperature difference between inside and outside. The strength and insulation functional layer is a sandwich panel structure consisting of a skin material and a core material, the skin material is a composite sheet consisting of continuous phase oil, inorganic reinforcing material and polymer resin in order to optimize the strength and heat insulation function, the core material is a structural material And a foamed resin plate functioning as a heat insulating material.

The anti-ballistic and explosion-proof functional layer is a functional layer for primarily protecting internal manpower from impacts from outside, especially debris or shooting caused by an explosion, and to an outer layer and an inner layer on an outer side of a building. consist of. The outer layer protects the inner layer from the external environment and at the same time serves to destroy or disperse the external object colliding with the building into small pieces. The inner layer absorbs the kinetic energy of the external object passing through the outer layer to prevent the external object from further traveling inside or to minimize the kinetic energy. The outer layer is applied to a high rigidity, high strength material, mainly using a composite material of a continuous phase reinforcement made of glass fiber or carbon fiber and a polymer resin. The inner layer applies a high-strength material, mainly using a composite material of a continuous phase reinforcement made of aramid fibers and a polymer resin.

In the light weight composite sandwich panel composition of the present invention, since the functional layers such as the soundproof functional layer, the bulletproof and security functional layer, the strength and insulation functional layer, the bulletproof and the explosion proof functional layer are integrated to form a sandwich panel component, the transport is easy and the site In the building of the sandwich panel in a proper way to obtain a building having the above various functions only by fastening and fastening, it is a very efficient building construction material that can establish a military building on the site in a short time. In addition, when the appropriate fastening method is applied, it has the advantage that it can be quickly disassembled and re-established after moving to another position.

Hereinafter, the present invention will be described in more detail.

The sound insulation functional layer is composed of a sound absorbing layer and a sound insulating layer. The sound absorbing layer is mainly composed of a flexible and high-strength fiber bundle, and has a structure equivalent to that of a porous plate. The sound energy reaching the sound absorbing layer causes friction by air vibration in small spaces formed between the fibers of the fiber concentrator, and the sound energy is converted into thermal energy by the friction, so that sound is absorbed. Some of this sound energy is transmitted to the fiber and is lost while causing the fiber to vibrate. The sound insulation layer consists mainly of a dense material, which is known to be proportional to the mass per unit area of the material. The sound insulation material has a function of suppressing a considerable level of vibration of the sound insulation layer by the sound energy when the sound energy is transmitted and reflecting the sound. The sound transmitted by this function is no longer transmitted through the sound insulation layer.

As such, the sound absorbing layer uses a plate-shaped material mainly composed of a porous fiber concentrator. In this invention, the board | plate material which concentrated the polyester fiber was used as a sound absorption material. In the case of the plate material using mineral fiber, the mineral fiber fragments are likely to scatter when exposed to the surface due to the characteristics of the material, and in the case of the plate material using the polyurethane material, the corroded polyurethane material may scatter due to long-term use. to be. The sound absorbing material used for the sound absorbing layer is generally a polyester fiber converging plate material having a density of 24 kg / m 3 to 50 kg / m 3. The sound absorbing material may vary sound absorption performance by density and thickness, and may be applied by determining the specification of the material according to the required sound absorbing performance.

The sound insulation layer mainly uses a material having a high density sheet or sheet. In the present invention, a sound insulating material obtained by kneading a mineral with a thermosetting rubber or polyvinyl chloride resin was used. The sound insulating material having the same composition has a high density of minerals mixed in high concentration, and generally has a density of 1.5 g / cm 3 to 2.2 g / cm 3 and low sound transmittance because of less vibration caused by sound energy. Moreover, the vibration energy of sound is attenuated by the flexible and elastic resin component.

The sound insulation function layer is a sound absorbing layer and the sound insulation layer is combined to give a sound insulation function. The soundproof functional layer is a functional layer exposed to the interior of the building in the light weight composite sandwich panel construction of the present invention, it is attached to the final process when manufacturing the light weight composite sandwich panel construction. The sound insulation layer can be used by adhering to the anti-ballistic and security functional layer of the lightweight composite sandwich panel construction of the present invention. The attaching method may be bonded to the bulletproof and security functional layer by bonding using an adhesive or fastening using a steel member. The sound absorbing layer may be used by bonding to the upper portion of the sound insulating layer in the same manner. The sound absorbing layer and the sound insulating layer may be prepared by bonding in advance, and these bonded composites may be attached to the antiballistic and security functional layer to be used. The sound absorbing layer is preferably exposed in the direction of the sound energy source. However, the sound absorbing layer exposed in the process of transporting, assembling and disassembling the light weight composite sandwich panel component of the present invention may be damaged, so that a member such as a lumber of appropriate thickness is fixed to the sound insulating layer prepared on the bulletproof and security functional layer. After the sound absorbing layer is prepared between the members, an extra anti-ballistic and security function layer may be attached to the upper part of the member to reinforce the anti-ballistic and security function and to protect the sound absorbing layer from damage caused by external impact. Alternatively, a sheet of a composite material sheet, a polymer resin extruded sheet, or the like may be attached onto the member and used.

The bulletproof and security functional layer is composed of a bulletproof functional composite layer and a security functional composite layer. The anti-ballistic functional composite material layer is composed of a composite material having a continuous aramid fiber having excellent tensile strength as a reinforcing material and a polymer resin as a base material. Aramid fibers used in bulletproof functional composites are mainly manufactured using aromatic polyamide resins having para-bonds. Copper aramid fiber has a very high strength due to its chemical structure with relatively long unfolded molecules and strong hydrogen bonds between amide groups.

The antiballistic functional composite material layer is obtained by preparing a prepreg impregnated with a resin in such continuous aramid fiber fabric, then laminating and integrating it. Examples of the resin used herein include thermosetting resins such as epoxy resins, unsaturated polyester resins, vinyl ester resins, and phenol resins, nylon resins, polyester resins, polyvinyl butyral resins, polycarbonate resins, and poly There are thermoplastic resins such as ketone resins and polyurethane resins, but are not limited thereto. The prepreg may also be prepared by using the thermosetting resin and the thermoplastic resin together. The prepreg prepared as described above is laminated in multiple layers and then heat and pressure are integrated to obtain an antiballistic functional composite material layer of appropriate thickness. At this time, the amount of the resin impregnated into the continuous aramid fiber fabric is preferably 10 to 40 parts by weight based on 100 parts by weight of the continuous aramid fiber fabric. If the amount of the resin exceeds 40 parts by weight with respect to 100 parts by weight of the continuous aramid fiber fabric, the weight of the anti-ballistic functional composite layer becomes heavy, which is disadvantageous in transporting the sandwich panel composition and at the same time deteriorates the ballistic performance. . When the amount of the resin is less than 10 parts by weight with respect to 100 parts by weight of the continuous aramid fiber fabric, a problem occurs in joining each prepreg layer, and an interlayer separation phenomenon may occur when an impact is applied from the outside. The thickness of the antiballistically functional composite material layer is adjusted according to the required antiballistic performance.

The security functional composite layer is a composite material having a continuous carbon fiber fabric as a reinforcing material and a polymer resin as a base material, and has a radio wave blocking function. Since carbon fiber with electrical conductivity is used as a reinforcing material, radio waves from inside and outside the building are continuously absorbed by the carbon fiber and cannot pass through walls or roofs, which is advantageous for communication security and the internal electronic equipment is not affected by external radio waves. You may not. The security functional composite layer is obtained by preparing a prepreg impregnated with a resin in a continuous carbon fiber fabric, then laminating and integrating it. The security functional composite layer is prepared using a continuous carbon fiber fabric as the reinforcement and using the same resin as the resin used to make the antiballistic functional composite layer. The amount of the resin for preparing the security functional composite layer is preferably 30 to 200 parts by weight based on 100 parts by weight of the continuous phase carbon fiber fabric. When the amount of the resin exceeds 200 parts by weight with respect to 100 parts by weight of the continuous carbon fiber fabric, the layer of copper-functional functional composite material becomes thicker than necessary and the radio wave blocking function may be degraded, and the amount of the resin is continuous carbon fiber fabric 100 When the amount is less than 30 parts by weight, the adhesion between the prepregs is insufficient, and interlayer separation may occur when the external shock is applied.

The anti-ballistic functional composite material layer and the security functional composite material layer are each prepared by integrating by using an appropriate adhesive, or by stacking each prepreg into one and applying heat and pressure once without using an adhesive. It can also be integrated into and used.

The strength and heat insulation functional layer is composed of a skin material and a core material. The skin material is a composite sheet composed of continuous phase oil, inorganic reinforcing material and polymer resin, and the core material is made of foamed resin sheet which imparts structural and insulating properties to the sandwich panel structure.

The composite sheet constituting the skin material of the sandwich panel structure is a sheet-like fiber-reinforced composite material prepared by applying, impregnating and polymerizing a resin composition to a continuous phase oil and an inorganic reinforcement material. It is a material that dramatically improved mechanical properties by compounding resins.

The continuous oil and inorganic reinforcing materials are characterized by using unidirectional fibers, continuous woven fabrics or nonwoven fabrics. The unidirectional fiber can use the mechanical performance of the fiber to the maximum, but since the function works in one direction, it is a material that is laminated and used as necessary. Continuous fiber fabrics are arranged while crossing fibers in a certain direction, so that they can have high mechanical properties with reinforcing effects in a plurality of directions, and various types of fabrics such as plain weave, runner weave, twill weave, and multiaxial fabrics can be used. Therefore, the physical properties of the composite material can be optimized. The nonwoven fabric has a structure in which fibers are arranged more freely than the continuous fiber fabric, and the reinforcing property is lower than that of the unidirectional fiber or continuous fiber fabric, but the mechanical properties of the nonwoven fabric are less than that of the fiber reinforced composite material. .

The unidirectional fiber, continuous fiber fabric or nonwoven fabric used in the present invention is not particularly limited, but in terms of mechanical properties, the fiber yarn constituting the reinforcing fiber fabric is selected from the group consisting of carbon fiber, glass fiber and aramid fiber or It is preferable that it is 2 or more types of fiber yarns. As the continuous fiber fabric according to the present invention, a fabric produced by the weaving method such as plain weave, twill weave or runner weave is used. The choice of continuous-phase fiber fabrics to be used can be selected from materials and weaving methods depending on the physical properties, mechanical properties and functions of the final product required. For example, carbon fiber is applied when high rigidity is required in the final product, and aramid fiber is mainly selected when impact strength is required. It is also possible to mix and use the continuous fiber fabric.

Next, the resin composition used for manufacture of the composite material sheet of this invention is demonstrated. As the matrix resin according to the present invention, a thermoplastic resin or a thermosetting resin may be used, and the matrix is impregnated with the reinforcing fiber to be composited, thereby expressing the mechanical properties of the composite material.

Examples of the thermoplastic resin include polyamide resin, polybutylene terephthalate resin, polycarbonate resin, thermoplastic polyurethane resin, polyphenylene sulfide resin, polyether ether ketone resin, polyolefin resin, polyketone resin One or two or more resins selected from the group consisting of one, but not limited thereto. The thermosetting resin is preferably one or two or more resins selected from the group consisting of unsaturated polyester resins, vinyl ester resins, epoxy resins, thermosetting urethane resins, and phenol resins, but is not limited thereto.

In addition, the resin used may further include a polymerization catalyst, UV stabilizer, color control additives, impact strength enhancer, heat stabilizer, viscosity regulator, flame retardant and the like.

The core material of the sandwich panel structure is a foamed resin plate of a polymer resin having a plate shape or a plate member having a heat insulating function as a concentrator of a mineral material, and a foamed resin plate of a polymer resin that gives heat insulation while minimizing weight, foamed glass, and foaming. Minerals, glass fiber concentrators, mineral fiber concentrators or porous sound absorbing materials can be used. These foams have a density of 20kg / ㎥ to 200kg / ㎥, when the density is less than 20kg / ㎥ has the advantage of lighter weight of the whole composition, but has a problem that the heat insulation performance, structural performance and compression performance is deteriorated, If the density exceeds 200kg / ㎥ compressive strength is very good, but the weight of the entire component is heavy, there is a problem that requires additional labor or equipment is required for construction in the field. The foam is preferably one or two or more foam resin plates selected from foam resin plates such as bead polystyrene foam, extruded polystyrene foam, polyethylene terephthalate foam, polyurethane foam, phenolic resin foam, and polyisocyanurate foam. . In addition, the polymer resin constituting the copper foam may contain a flame retardant to enhance the flame retardant performance. In addition, a foamed glass, a foamed mineral, a glass fiber condenser, a mineral fiber condenser or a porous sound absorbing material can be used as the core material.

The method for producing a sandwich panel structure of the present invention comprises the steps of preparing a composite sheet by applying, impregnating and polymerizing a resin composition to a continuous phase oil and inorganic reinforcing material; Applying an adhesive on the fiber reinforced composite sheet; Laminating a foamed resin plate on the adhesive layer; Applying an adhesive on the foamed resin plate; Stacking a composite sheet on the adhesive layer to form a laminate having a sandwich panel structure; And bonding the fiber-reinforced composite sheet and the foamed resin plate by hardening the adhesive by applying heat and pressure at the top or the top and bottom of the laminate of the sandwich panel structure.

The adhesive bond layer of the sandwich panel of this invention is demonstrated. Adhesive layer of the present invention serves to bond the core material and core material, core material and skin material. The adhesive layer is formed by applying one or two or more resin adhesives selected from the group consisting of a one-component urethane-based resin adhesive, a two-component urethane-based resin adhesive, and an epoxy-based resin adhesive onto a reinforcing fiber composite or core material. The adhesive can be used for adhesion between soundproof functional layers, antiballistic and security functional layers, bearing and insulation functional layers and antiballistic and explosion proof functional layers. Meanwhile, in the present invention, a flame retardant may be mixed with the adhesive layer.

The anti-ballistic and explosion-proof functional layer is an outermost layer of the light weight composite sandwich panel component of the present invention, and has a function of primarily mitigating or defending an external impact or attack applied to a building made of the light weight composite sandwich panel component.

The outer and inner layers of the anti-ballistic and explosion-proof functional layer have a function of alleviating a shock transmitted to the inside of the building against direct external impact or attack or defending a projectile or fragment thereof toward the inside of the building.

The outer layer of the anti-ballistic and explosion-proof functional layer has a function of preventing the progress of the external object while minimizing the amount of deformation of the outer layer within the strength range for the object that proceeds from the outside to the building by applying a high rigidity and strength. At this time, the external object is deprived of significant kinetic energy and can be deformed or destroyed by a strong impact. This outer layer consists of fiber-reinforced composites, which are usually prepared in the form of sheets or plates. The fiber-reinforced composite material used in the outer layer is composed of carbon fiber or glass fiber having a very high rigidity and high strength as a continuous phase oil and inorganic reinforcing material, in particular, unidirectional fiber or continuous fiber fabric of continuous carbon fiber or continuous glass fiber. Preference is given to using.

The fiber-reinforced composite material forming the outer layer of the anti-ballistic and explosion-proof functional layer is obtained by preparing a prepreg impregnated with a resin in such a continuous carbon fiber or continuous glass fiber fabric, and then laminating and integrating it.

Examples of the resin used herein include thermosetting resins such as epoxy resins, unsaturated polyester resins, vinyl ester resins, and phenol resins, nylon resins, polyester resins, polyvinyl butyral resins, polycarbonate resins, and poly Thermoplastic resins, such as a ketone resin and a polyurethane resin, can be enumerated, A prepreg can also be manufactured using the said thermosetting resin and a thermoplastic resin together.

In order to increase the impregnation of the resin, the thermoplastic resin may be selected to prepare a prepreg by the following method.

The resin composition containing the said thermoplastic resin particle is apply | coated on a reinforcing fiber. Particles of the above-described configuration is a configuration having a powder form, the powder can be easily prepared by adding and dispersing the thermal polymerization catalyst in the melt of the monomer of the thermoplastic polymer, the powder can be prepared by the dispersion process described later Since it can be dispersed on the surface, it should be interpreted to include all forms such as granules and pellets. As the powder composed of particles is uniformly dispersed on the reinforcing fiber fabric layer, the surface of the fiber reinforcing material is covered with the powder, and the volume ratio with the fiber reinforcing layer can be adjusted according to the dispersion thickness of the powder.

Thereafter, the reinforcing fiber layer to which the particles are applied is heat treated so that the particles are melted and impregnated into the reinforcing fiber layer while thermally polymerizing the monomer of the thermoplastic polymer into the thermoplastic polymer. That is, the heat treatment of the reinforcing fiber layer to which the particles are applied melts the monomer which is the matrix component of the powder composed of the particles, and the melt of the monomer has a low viscosity so that it is well impregnated with the fiber reinforcing material. In addition, the monomer melt impregnated on the fiber reinforcement layer is polymerized into a polymer by a dispersed thermal polymerization catalyst. The heat treatment may be appropriately selected as a temperature at which the melting and polymerization of the monomers is possible, for example, 160 to 300 ° C., and the heat treatment temperature may be adjusted stepwise as necessary.

The prepreg thus prepared is stacked in several layers, and then an outer layer having an appropriate thickness is obtained by integrating heat and pressure. At this time, the amount of the resin impregnated into the continuous carbon fiber fabric is preferably 35 to 100 parts by weight based on 100 parts by weight of the continuous carbon fiber fabric. When the amount of the resin exceeds 100 parts by weight relative to 100 parts by weight of the continuous phase carbon fiber fabric, the rigidity of the outer layer may not be sufficient to prevent external objects and the outer layer may be deformed or destroyed. When the amount of the resin is less than 35 parts by weight with respect to 100 parts by weight of the continuous phase carbon fiber fabric, a sufficient impregnation of the resin may not be achieved, and a defective part having very low rigidity and strength may occur. The amount of the resin impregnated into the continuous glass fiber fabric is preferably 25 to 70 parts by weight based on 100 parts by weight of the continuous glass fiber fabric. When the amount of the resin exceeds 70 parts by weight with respect to 100 parts by weight of the continuous phase carbon fiber fabric, the rigidity of the outer layer may not be sufficient to prevent external objects and the outer layer may be deformed or destroyed. When the amount of the resin is less than 25 parts by weight with respect to 100 parts by weight of the continuous phase glass fiber fabric, sufficient impregnation of the resin may not be achieved, and a defective part having very low rigidity and strength may occur.

In the outer layer of the anti-ballistic and explosion-proof functional layer, by attaching or installing a functional film, sheet, plate, etc. on the upper portion thereof, it is possible to minimize the influence of the external environment on the anti-ballistic and explosion-proof functional layer.

The inner layer of the anti-ballistic and explosion-proof functional layer applies a material having high toughness and strength, which prevents further progress after losing some of the kinetic energy while passing through the outer layer, which has not been blocked in the outer layer. Do it. Most objects deform or break down through the outer layer and break up into small pieces. When these objects reach the inner layer, they meet with tough and high-strength materials and lose most of their kinetic energy and become trapped in the inner layer. In other words, the kinetic energy of the external object penetrating the outer layer is transferred to the continuous phase oil and inorganic reinforcement through the polymer resin of the fiber reinforced composite material forming the inner layer, and the continuous phase fiber used as the continuous phase oil and the inorganic reinforcement material. At this time, the transmitted kinetic energy is transferred into the fiber in a very short time, attenuated and absorbed. Particularly, continuous phase fibers having a very high tensile strength and strong toughness have a very large kinetic energy damping and absorption effect, and are therefore very suitable as a continuous phase oil and inorganic reinforcing material constituting an inner layer.

The inner layer of the anti-ballistic and explosion-proof functional layer is made of a fiber-reinforced composite material having a fabric made of continuous aramid fibers having excellent tensile strength as a reinforcing material and a polymer resin as a base material. Aramid fibers used in the inner layer is prepared using an aromatic polyamide resin mainly consisting of para- bonds.

The inner layer of the anti-ballistic and explosion-proof functional layer is obtained by preparing a prepreg in which the continuous aramid fiber fabric is impregnated with a resin, and then laminating and unifying it. Examples of the resin used herein include thermosetting resins such as epoxy resins, unsaturated polyester resins, vinyl ester resins, and phenol resins, nylon resins, polyester resins, polyvinyl butyral resins, polycarbonate resins, and poly There are thermoplastic resins such as ketone resins and polyurethane resins, but are not limited thereto. The prepreg may also be prepared by using the thermosetting resin and the thermoplastic resin together. The prepreg thus prepared is laminated in several layers, and then an inner layer having an appropriate thickness is obtained by integrating heat and pressure. At this time, the amount of the resin impregnated into the continuous aramid fiber fabric is preferably 10 to 40 parts by weight based on 100 parts by weight of the continuous aramid fiber fabric. If the amount of the resin exceeds 40 parts by weight with respect to 100 parts by weight of the continuous aramid fiber fabric, the weight of the anti-ballistic functional composite layer becomes heavy, which is disadvantageous in transporting the sandwich panel composition and at the same time deteriorates the ballistic performance. . If the amount of the resin is less than 10 parts by weight with respect to 100 parts by weight of the continuous aramid fiber fabric, a problem occurs in the bonding of each prepreg layer, and an interlayer separation phenomenon occurs when an impact is applied from the outside. And through the explosion-proof functional layer.

The inner and outer layers of the anti-ballistic and explosion-proof functional layer may be prepared by adjusting the thickness of the prepreg according to the required performance.

Hereinafter, a method for manufacturing a light weight composite sandwich panel component according to the present invention will be described in detail with reference to the following examples, but the scope of the present invention is not limited to the following examples.

EXAMPLE

(1) Production of anti-ballistic and explosion-proof functional layer

A glass fiber fabric having a basis weight of 1,000 g / m 2 was prepared using glass fiber roving having a linear density of 2,400 tex, and a powder of ultra low viscosity polyamide 6 resin having an average particle diameter of 100 micrometers was prepared as a base material.

 After wrapping the prepared 2.2m wide glass fiber fabric in a rolled state, one layer was unrolled on the carrying belt, and then, at a constant speed, 880 g of polyamide 6 resin powder was applied on the top of the fabric. In addition, one layer of the glass fiber fabric was further prepared and covered with the upper portion of the glass fiber fabric and the polyamide 6 resin powder mixture prepared as described above while moving and unwinding from the roll in the same manner as above. After continuously applying the raw material prepared as described above, heat was applied to melt the resin to impregnate the resin between the glass fibers, and then the composition was cooled to prepare a fiber-reinforced composite prepreg sheet for manufacturing the outer layer of the bulletproof and explosion-proof functional layer of a constant thickness. Got it.

2.2m wide and rolled in rolls, 1 × 500 denier aramid fibers, 410g / m² of 2 x 2 basket fabric, weighed in the same way as above, unfold one layer on the carrying belt and move at a constant speed. 50 g of polyamide 6 resin powder per m 2 of aramid fiber fabric was applied to the top of the fabric, and then the resin was melted by applying heat while continuously pressing the aramid fiber fabric and the polyamide 6 resin powder mixture. After impregnating the resin, the composition was cooled to obtain a fiber-reinforced composite prepreg sheet for inner layer production of a bulletproof and explosion-proof functional layer of a constant thickness.

Four sheets were prepared by cutting the composite prepreg sheet for outer layer production to 2.2 m in width and 6.2 m in length obtained by the above process, and 30 sheets were prepared by cutting the composite prepreg sheet for inner layer to 2.2 m in width and 6.2 m in length. . 30 sheets of the composite prepreg sheets for inner layer production were prepared by laminating on a raw material conveying roller conveyor, and 4 sheets of the composite prepreg sheets for outer layer manufacturing were prepared on these laminates, and then 50um thick white polyester film was placed on the laminates. Was prepared.

Heat and pressure were applied to the laminate of the composite prepreg sheet and the white polyester film prepared as above to be integrated to produce a bulletproof and explosion-proof functional layer having a thickness of 16 mm. At this time, the outer layer of the anti-ballistic and explosion-proof functional layer was 6 mm thick, and the inner layer was 10 mm thick.

(2) Production of strength and heat insulation functional layer

A glass fiber fabric having a basis weight of 580 g / m 2 was prepared using glass fiber roving having a linear density of 1,200 tex, and a powder of an ultra low viscosity polyamide 6 resin having an average particle diameter of 100 micrometers was prepared as a base material.

 In a state in which the prepared 2.2 m wide glass fiber fabric was wound in a roll state, 510 g of polyamide 6 resin powder per 1 m 2 of glass fiber fabric was uniformly applied to the top of the fabric while unrolling one layer onto the carrying belt and moving it at a constant speed. In addition, one layer of the glass fiber fabric was further prepared and covered with the upper portion of the glass fiber fabric and the polyamide 6 resin powder mixture prepared as described above while moving and unwinding from the roll in the same manner as above. Heat was applied while continuously pressing the raw materials prepared as described above to melt the resin to impregnate the resin between the glass fibers, and then the composition was cooled to obtain a composite sheet having a constant thickness.

Two sheets were prepared by cutting the composite sheet into a width of 2.2 m and a length of 6.2 m, and a foamed polyethylene terephthalate resin plate having a density of 70 kg / m 3 and a thickness of 150 mm was prepared. One composite sheet was prepared on a workbench, and a two-component urethane adhesive was applied on the composite sheet. A foamed polyethylene terephthalate resin plate prepared on a two-component urethane-based adhesive was placed, and a two-component urethane-based adhesive was applied on the resin plate. One composite sheet prepared on the two-component urethane-based adhesive was prepared, and the adhesive was cured and integrated by a method of applying heat while pressing the composite sheet and the foamed resin laminate to prepare a strength and thermal insulation functional layer. .

(3) Manufacture of bulletproof and security functional layers

A carbon fiber fabric having a basis weight of 280 g / m 2 was prepared using carbon fibers having a linear density of 400 tex (6K), and a powder of ultra low viscosity polyamide 6 resin having an average particle diameter of 100 micrometers was prepared as a base material.

 In a state where the prepared 1.2 m wide carbon fiber fabric was wound in a roll state, 350 g of polyamide 6 resin powder per 1 m 2 of carbon fiber fabric was uniformly applied to the upper fabric while releasing one layer onto the carrying belt and moving it at a constant speed. In addition, one layer of the carbon fiber fabric was additionally prepared and covered with the above-described method while covering the top of the carbon fiber fabric and the polyamide 6 resin powder mixture prepared as described above. After continuously applying the raw materials prepared as described above, heat was applied to melt the resin to impregnate the resin between the carbon fibers, and the composition was cooled to prepare a security functional composite material layer of bulletproof and security functional layers having a constant thickness. A fiber reinforced composite prepreg sheet was obtained.

2 x 2 basket fabrics of 410 g / m 2 basis weight, woven from 1,500 denier aramid fibers, 1.2 m wide and rolled into rolls, were unrolled at a constant speed by unfolding one layer on the carrying belt in the same manner as above. 50 g of polyamide 6 resin powder per m 2 of aramid fiber fabric was applied to the top of the fabric, and then the resin was melted by applying heat while continuously pressing the aramid fiber fabric and the polyamide 6 resin powder mixture. After impregnating the resin, the composition was cooled to obtain a fiber-reinforced composite prepreg sheet for producing a bulletproof functional composite material layer having a bulletproof and security functional layer of a constant thickness.

One sheet was prepared by cutting the composite prepreg sheet for manufacturing a security functional composite layer obtained by the above process to 1.2m in width and 6.2m in length, and the composite prepreg sheet for producing a bulletproof functional composite layer in width 1.2m and 6.2m in length. 30 sheets were prepared by cutting. After stacking one sheet of composite prepreg sheet for manufacturing a security functional composite material layer on the raw material conveying roller conveyor, and preparing 30 sheets of composite prepreg sheet for manufacturing a bulletproof functional composite material layer on the laminate, A 50-um thick white polyester film was prepared.

Heat and pressure were applied to the laminate of the composite prepreg sheet and the white polyester film prepared as described above to be integrated to produce a bulletproof and security functional layer having a thickness of 11 mm. At this time, the security functional composite material layer of the bulletproof and security functional layer was 1 mm thick, and the bulletproof functional composite material layer was 10 mm thick.

(4) Production of sound insulation functional layer

In the sound-absorbing layer of the soundproofing functional layer, a product having a density of 45 kg / m 3 was prepared as a polyether fiber condenser having a width of 1 m, a width of 2 m, and a thickness of 25 mm. As a sound insulation layer, a product having a specific gravity of 2.1 g / cm 3 was prepared as a polyvinyl chloride resin composite having a width of 1 m, a width of 1 m, and a thickness of 2 mm.

(5) Fabrication of Lightweight Composite Sandwich Panel Components

Each functional layer manufactured by the said process (1)-(4) was prepared. A wooden box having a width of 28 mm, a width of 28 mm, and a length of 3 m was prepared. In addition, the composite sheet prepared in step (2) was cut into 2 m in width and 6 m in length to prepare one sheet.

The ballistic-proof and explosion-proof functional layer obtained by the said process (1) was cut and prepared to 2 m in width and 6 m in length using the circular saw. The yield strength and heat insulation functional layer obtained at the said process (2) were cut out and prepared to 2 m in width and 6 m in length using the circular saw. The bulletproof and security functional layer obtained at the process (3) was cut | disconnected and prepared to 1 m in width and 6 m in length.

The anti-ballistic and explosion-proof functional layer cut by the above method was prepared on the workbench, but the white polyester film was placed face down. A two-component urethane-based adhesive was applied onto the prepared antiballistic and explosion proof functional layers. The load-bearing and heat-insulating functional layer cut by the above method was placed on the applied adhesive so that there was no deviation of the ballistic-proof and explosion-proof functional layer. A two-component urethane-based adhesive was applied onto the placed proof strength and heat insulating functional layer. The antiballistic and security functional layer was placed on the applied adhesive, such that the antiballistic functional composite layer was bonded onto the proof strength and thermal insulation functional layer. A two-component urethane-based adhesive was applied on the placed bulletproof and security functional layer. The sound insulation layer prepared on the apply | coated adhesive was arrange | positioned so that there may be no gap between sound insulation layers. The prepared wooden blocks were placed on the arranged sound insulation layer and fixed to the above bulletproof and security functional layer and the sound insulation layer with a direct screw having a length of 50 mm. At this time, the distance between the centers of each box was 1,028mm so that the sound-absorbing layer can be fitted without empty space. Using the extra timbers, the cut surfaces of the placed timbers were placed perpendicular to each other so that the sound absorbing layer stayed in the prepared timber frame. The sound-absorbing layer was inserted in the wooden frame prepared as described above, and a two-component urethane-based adhesive was applied on the wooden box. The composite sheet prepared in step (2) on the applied adhesive was placed to fit the size of the sandwich panel construction and secured to the box with a straight screw 50 mm long. By the same process as above, a lightweight composite sandwich panel component having a width of 2 m and a length of 6 m was obtained.

The lightweight composite sandwich panel component obtained by the above method has the advantage of being assembled and stored in advance according to the design at the factory and then transported to the site as needed to quickly assemble the building.

Thus, it is suitable for use as sandwich panel construction for military purpose buildings where speed is required.

Claims (6)

Bulletproof and explosion proof functional layers;
Strength and heat insulation functional layer on the anti-ballistic and explosion-proof functional layer;
Anti-ballistic and security functional layers on the proof strength and thermal insulation functional layers; And
Comprising a soundproof functional layer on the anti-ballistic and security functional layer, the anti-ballistic and explosion-proof functional layer is located at the outermost,
The anti-ballistic and explosion-proof functional layer is composed of an outer layer and an inner layer, wherein the outer layer is a fiber reinforced composite material obtained by impregnating a resin on carbon fiber or glass fiber, and the inner layer is a fiber reinforced composite obtained by impregnating a resin on aramid fibers. Material
The strength and heat insulation functional layer is made of a skin material and a core material, wherein the skin material is a sheet-reinforced fiber reinforced composite material prepared by applying, impregnating and polymerizing a polymer resin composition on a reinforcing fiber, and the core material is a foam of a polymer resin. It is one kind selected from the group consisting of a resin plate, a foamed glass, a foamed mineral, a glass fiber focusing body, a mineral fiber focusing body, and a porous sound absorbing material,
The anti-ballistic and security functional layer is composed of a bulletproof functional composite material layer and a security functional composite material layer, the anti-ballistic functional composite material layer is a composite material obtained by impregnating a resin on an aramid fiber fabric 100 parts by weight of the aramid fiber fabric The resin is 10 to 40 parts by weight, the security functional composite layer is a composite material obtained by impregnating a resin on a carbon fiber fabric, and the resin is 30 to 200 parts by weight based on 100 parts by weight of the carbon fiber fabric,
The sound insulation functional layer is composed of a sound absorbing layer and a sound insulating layer, and the sound absorbing layer is a polyester fiber converging plate member having a density of 24 kg / m 3 to 50 kg / m 3, and the sound insulating layer is any of thermosetting rubber and polyvinyl chloride. A light weight sandwich panel component prepared by kneading one kind with a mineral and having a density of 1.5 g / cm 3 to 2.2 g / cm 3. delete delete delete delete The method of claim 1,
The resin of the anti-ballistic and explosion-proof functional layer is a thermoplastic resin, one or two selected from the group consisting of nylon resin, polyester resin, polyvinyl butyral resin, polycarbonate resin, polyketone resin, and polyurethane resin Light weight sandwich panel component, characterized in that more than one species.