KR20070121148A - Multifunctional flame retardant polystyrene foam and its manufacturing method - Google Patents

Abstract

A multi-functional, flame-retardant expanded polystyrene foam is provided to ensure excellent molding adhesion, to improve compressive strength and flame retardancy, and to minimize a damaged surface area thereof upon firing. A multi-functional, flame-retardant expanded polystyrene foam is manufactured by the steps of: preparing expanded polystyrene beads; high-pressure spraying 100-170 parts by weight of a multi-functional flame retardant composition onto 100 parts by weight of the expanded polystyrene beads; drying the coated beads with hot blast; aging the dried beads in a silo; expanding the aged beads; drying and aging the expanded beads in a drying and aging room equipped with a blowing gas removal air-conditioner and a dehumidifier for 10-20 minutes; drying and aging the beads in a yard for 2-3 days; and removing residual gases from the beads through a catalytic reaction.

Description

Multifunctional flame retardant foam polystyrene foam and method for manufacturing the same

1 is a process diagram of the present invention

The present invention relates to a multi-functional flame-retardant foam polystyrene foam and a method for manufacturing the same, by using a conventional foam polystyrene foam manufacturing apparatus (process) of the same industry, by injecting the EPS raw material into the steam heating foam of the manufacturing apparatus first 100 to 170 parts by weight of the flame retardant composition of the present invention was blended and kneaded with respect to 100 parts by weight of the EPS foam beads prepared by foaming, transporting them through a drying process, and storing and aging them in between to prepare a flame retardant EPS foam beads through a hot air drying process. Multi-functional flame-retardant foamed polystyrene foam with improved flame retardancy and improved point cohesion when manufacturing multi-functional foamed polystyrene foam by storing and steam-heat-molding in a conventional foamed polystyrene foam molding machine and effectively removing foaming gas using a gas removal catalyst. The manufacturing method is characterized.

The flame retardant composition used in the present invention is based on 100 parts by weight of the liquid silicate mixture of the present invention 0.5 to 20 parts by weight of inorganic flame retardant, 0.5 to 15 parts by weight of phosphorus flame retardant, 10 to 30 parts by weight of zeolite as a functional filler, flame retardant performance enhancing flame retardant 0.5 to 20 parts by weight of graphite for the purpose of improving the efficiency of electromagnetic waves, 0.5 to 40 parts by weight of thermally expandable graphite, 0.5 to 50 parts by weight of bentonite classified as an inorganic thickener for the purpose of increasing the viscosity and increasing the flame retardant effect, and 0.5 to 50 parts by weight of the inorganic porous thermal insulation material. It is characterized by producing by mixing and dispersing the flame retardant composition of the present invention composed of 30 parts by weight.

In addition, in the present invention, in order to diversify the physical properties and functions of the multi-functional flame-retardant expanded polystyrene foam by adding zeolite for the purpose of removing harmful gas and humidity control, deodorization, static elimination, far-infrared radiation, matting effect and color enhancement of the used space In order to diversify the physical properties and its functions by using the mixture, it is also used in the cutting and processing process such as cutting and molding processing for the secondary processing purposes such as sandwich panel and woodworking engraving processing cutting at the construction site. As a method for improving sawdust scattering of foamed polystyrene foam, functional foamed polystyrene foam with excellent workability is improved by removing static electricity generated during processing by adding zeolite to improve scattering environmental pollution in the workplace.

The expanded polystyrene foam prepared by adding the zeolite has a catalytic function of adsorption and removal of ammonia gas and nitrogen oxide gas, which are functional features of the zeolite, so that the underground parking lot of a building, an underground space of a building, a restaurant, a cooking facility, an enclosed space When used as a thermal insulation for water purification plants, wastewater treatment plants, septic tanks of large buildings, etc., it has an additional function of removing harmful gases and deodorizing effect.

In addition, in order to improve the decrease in thermal insulation performance of the expanded polystyrene foam caused by the addition of a flame retardant, expandable graphite having excellent thermal insulation performance was added and improved.

The selection of flame retardants was overcome by using inorganic flame retardants, phosphorus flame retardants and expandable graphite that meet the enhanced environmental standards. In addition, multifunctional flame retardant polystyrene foam having excellent cutting processability that can be cut even after the flame retardant composition of the present invention is added is manufactured. The foam was made.

Therefore, in case of further strengthening the flame retardant performance and additional functions of the expanded polystyrene foam, it is possible to improve the safety of fire, to expand its use, to improve the environmental pollution of the workplace, and to increase the economic added value and the commercial value.

In general, the production of flame-retardant expanded polystyrene foam is performed by using a flame-retardant EPS raw material manufactured by mixing a flame retardant in the EPS raw material manufacturing process, and forcibly injecting a flame-retardant liquid by cutting the finished foamed polystyrene foam board or using a pin for joining. The product using the method of making is manufactured.

In addition, lightweight boards are manufactured by molding and curing molded EPS beads or waste styropol into particles by using cement slurry and adhesives, and another manufacturing method is foaming raw materials of EPS beads (Beads). The method of foaming pulverized EPS beads of which the surface area is expanded to foam and repeatedly applying calcium carbonate and sodium silicate has been disclosed as a registered patent.

Most of the flame retardant foam polystyrene foam products injected with the above flame retardant are used as interior materials of sandwich panels, and the styropole lightweight board using the cement slurry and adhesive is used as a high-strength product that is used as an internal lightweight partition or prefabricated wall. have.

However, these products have structural defects in the manufacturing process and are used only for specific purposes. The defects include flame retardant foam polystyrene foam products in which the flame retardant is injected, and low density foam for injecting the flame retardant into the finished foam board. Since the board should be used and more preferably the flame retardant should be injected evenly by further expanding the voids between the EPS foam particles of the board, the bonding strength between the EPS foam particles is lowered and is used for internal filling.

In addition, the lightweight styropole board of the method of curing curing into a mold using the cement slurry and adhesive, when the amount of cement slurry for flame retardation and bonding curing is reduced, the pozzolanic hydration reaction of the cement is insufficient and the bonding strength is insufficient. It is not possible to reduce the thermal insulation performance due to the use of excessive cement, and the disadvantages of being used as an auxiliary insulation material, and the increase in weight and the cutting of hot wires are impossible, so cutting workability is disadvantageous.

As another manufacturing method of the above, a method of forming by repeatedly applying calcium carbonate and sodium silicate by foaming the pulverized EPS beads of the expanded raw material of EPS beads (expanded) by expanding the surface area of the beads. This is the first step. EPS beads before foaming are crushed to 1/8 to 1/8 size through the grinding process. Next, the next step is to foam the beads 5 to 20 times, and then the pool or dilute solution of sodium silicate is coated on the foamed beads, followed by coating the calcium carbonate powder and repeating the process twice And then kneaded with additional sodium silicate, and then pressed into the mold to press and pressurized, and flame-retardant styrofoam formed by supplying carbon dioxide gas for flame retardant and hardening purposes It has been introduced.

This was done by crushing the EPS beads before foaming to the size of 1/2 to 1/8 and foaming the beads 5 to 20 times. Destructive breakdown of the independent bubble, which is relatively a relatively reduced insulation function and has the disadvantage of increasing the amount of moisture absorption.

As a disadvantage, the efficiency of the insulation is the most effective way of breaking the structure of the independent bubble structure, and the thermally conductive binder (sodium silicate, calcium carbonate) penetrates into the wider surface on the enlarged surface area. Since it is applied, the thermal insulation performance is lowered.

In addition, since the surface of the expanded polystyrene bead particles is a waterproof resin film, it has a waterproofing performance, and thus exhibits an effective thermal insulation structure. However, the surface of the crushed and curved surface having an enlarged surface area is a capillary tube that stores moisture or moisture. As it is opened in a structure, the absorption rate is increased, so that the thermal insulation efficiency is lowered and the absorption rate is increased.

Insulation material containing moisture is degraded due to the high thermal conductivity of moisture, and becomes a weak waterproof structure.

In addition, the pulverized EPS beads before foaming after the process of crushing the raw material of the EPS beads (beads) before the foaming to a size of 1/2 to 8/8 through the grinding process is saturated in the EPS beads (Beads) in the grinding process As the foaming gas is volatilized, the foaming performance is lost, and foaming is insufficient. In addition, the EPS beads after foaming have been subjected to a process of crushing the foamed EPS beads to a size of 1/2 to 8/8. As the foaming gas is volatilized in the aging process, further foaming is not suitable.

In addition, the flame-retardant foam polystyrene foam product injecting the flame retardant solution is disclosed in Utility Model Application 20-2005-0036052, the flame-retardant by cutting the foamed polystyrene foam board or using a pin for joining and using a vacuum adsorption method in combination It is manufactured by the method of forcing a liquid.

However, the flame retardant foam polystyrene foam product injected with the flame retardant should use a low density foam board to inject the flame retardant into the finished foam board, and evenly expand the air gap between the EPS foam particles of the foam board to even out the flame retardant. Since the bond strength between the EPS foam particles is lowered and the dense adhesive structure between the EPS foam particles inside the foam board that is molded and bonded during the EPS raw material foam molding process does not penetrate the flame retardant, it is inefficient and separate flame retardant is injected. The process must be carried out, resulting in an increase in production costs.

In addition, the flame retardant completely fills the voids between the foamed beads, which leads to overuse of the flame retardant, which makes it impossible to cut the hot wire and prolongs exposure to moisture to form low density foamed polystyrene foam voids, flame retardants and sheaths or coalesce. It shows the disadvantage of decreasing the insulation performance by increasing the absorption of moisture on the damaged part using the dragon pin, and the bond strength gradually decreases.

In addition, when foamed using a flame-retardant EPS raw material prepared by mixing a flame retardant in the EPS (EPS raw material) raw material manufacturing process, it is recognized that the foaming ratio is low and the flame retardant performance is insufficient, so it is not economical.

Therefore, the present invention has solved the above problems and studied the flame retardant expanded polystyrene foam and its manufacturing method to diversify the function, in order to achieve this, mixing the zeolite used as the functional material in the present invention to the liquid silicate mixture of the present invention Mix and disperse one or two or more of the group consisting of inorganic flame retardant and phosphorus flame retardant, which are relatively environmentally safe, and mix and disperse the thermally expandable graphite in the present invention, which is environmentally safe and improves flame retardant effect and thermal insulation performance. By kneading to prepare and prepare the functional flame retardant composition of the present invention, by mixing and mixing the flame retardant composition of the present invention in EPS foam beads using a conventional foam polystyrene foam manufacturing apparatus of the same industry through a hot air drying process flame-retardant EPS foam Prepare beads and foam polystyrene foam After heating and steam-forming in a steaming process, after aging is completed, cutting and processing are carried out, and foaming gas is effectively removed by using a gas removal catalyst to produce a multifunctional foamed polystyrene foam, which overcomes the water resistance deterioration, which is a disadvantage of liquid silicate. The multifunctional flame-retardant expanded polystyrene foam with improved cohesion and water resistance was confirmed and completed the present invention.

Therefore, in the present invention, the liquid silicate mixture of the present invention is prepared to improve the coking force and the flame retardant performance, and the zeolite is added to diversify the above functions and remove the harmful gas, and the thermally expandable graphite is added to the flame retardant combustion carbon film. Preparation to solve the above problems by forming (char) and kneading the EPS foam beads in the flame retardant composition of the present invention prepared by further improving the thermal insulation deterioration caused by the addition of a flame retardant, and by adding an inorganic and phosphorus flame retardant The method was completed.

Accordingly, it is an object of the present invention to improve flame retardancy, to reduce the amount of harmful gas generated during combustion, to minimize the surface area of the expanded polystyrene foam in the event of fire, and to provide a multi-purpose foamed polystyrene foam for multipurpose purposes and a method of manufacturing the same.

In order to achieve the above object, the multi-functional flame-retardant polystyrene foam according to the present invention and a method for producing the same flame retardant having the above-mentioned multi-function in the EPS beads (foads) foamed using a conventional foam polystyrene foam manufacturing apparatus in the industry The flame retardant composition according to the present invention is dried and aged by mixing and kneading the flame retardant composition of the present invention, which is composed by mixing a functional filler flame retardant with a liquid silicate mixture in order to achieve the above object. It provides a multi-functional flame-retardant foam polystyrene foam and a method of manufacturing the foamed EPS beads coated with a multi-functional flame retardant composition is completed by the production process of the catalytic reaction aging through steam heating molding and drying process.

More specifically, EPS beads (foam beads), which are resin raw materials for foaming, are added to a steam heating foam part of a conventional foamed polystyrene foam manufacturing apparatus, and firstly foamed and dried through transfer and aged to form foamed EPS beads. Preparing; 100 parts by weight of foamed EPS beads are quantitatively supplied to the mixing kneading mixer for coating the flame retardant composition of the present invention, and 100 to 170 parts by weight of the flame retardant composition according to the desired flame retardant grade is injected under high pressure. Kneading for 10 minutes to uniformly coat the multifunctional flame retardant composition of the present invention on the foamed EPS beads; Removing the moisture of the flame retardant by kneading the coated EPS beads at a low temperature for 5 to 10 minutes in a hot air drying apparatus maintained at 50 to 60 ° C .; Removing the entanglement and adhesion of the coated EPS beads and drying the residual moisture of the coated EPS beads in a secondary hot air drying unit maintained at 50 to 60 ° C. to carry out transfer storage aging between them; Putting the EPS beads, which have completed the coating process by storage aging for a predetermined time, into a molding machine, and performing secondary foam molding while maintaining a steam heating temperature at 98 ° C .; In order to improve the efficiency of removing residual moisture of foamed gas and foamed heated steam after molding, a residual gas adsorption removal air conditioner equipped with an activated carbon filter and zeolite filter is installed as a residual gas removing device in a drying mature room, and residual foamed steam remains. Drying aging in a dry aging room for 10 to 20 minutes after molding to install a dehumidifier for removing moisture; Drying aging for 2 to 3 days in a naturally dry aging field in a well ventilated condition; Cutting according to the use; Subsequently, in order to further improve the flame retardant performance of the cut foamed polystyrene foam and to reduce the deformation of the product due to residual gas and residual moisture, the catalytic reaction to remove residual EPS foam gas and residual moisture by using the catalytic reaction of zeolite included in the flame retardant composition. Method to smoothly ventilate the foamed polystyrene foam that has been cut by the method, and matured by degassing catalytic reaction using zeolite for 7 to 10 days, and removes the foamed vapor water remaining in the voids between the foamed gas remaining in the EPS beads and the beads. Multifunctional flame-retardant polystyrene foam and a method for producing the same, characterized in that the product is completed through a catalytic reaction step to reduce the deformation of the product and further increase the flame retardant performance.

In the present invention, the foamed polystyrene foam prepared according to the present invention, which exhibits various functions of the expanded polystyrene foam according to the present invention and an extended durability of flame retardant physical properties, is referred to as a multifunctional flame-retardant foamed polystyrene foam.

In order to impart the above-mentioned versatile functionality, in the present invention, zeolite, graphite, and expandable graphite are added and kneaded, and thus, a certain amount is mixed in the flame retardant composition manufacturing process to achieve the object.

The zeolite used in the present invention can be used both natural zeolite synthetic zeolite artificial zeolite and in the case of synthetic zeolite a very wide variety of types of products are synthesized and manufactured, and its function also shows various characteristics in the present invention of the multi-functional flame-retardant polystyrene foam According to the purpose of use, one or two or more kinds of the zeolite group were selected and blended to achieve the object. The amount used is 10 to 30 parts by weight, more preferably 15 to 20 parts by weight based on 100 parts by weight of the liquid silicate mixture of the present invention.

The performance improvement characteristics of the multifunctional flame-retardant expanded polystyrene foam of the present invention by mixing and kneading the zeolite were improved in the humidity control function (water discharge function), and thus the long-term gap in the foamed EPS beads, which is a disadvantage of the conventional foamed polystyrene foam, was improved. Cumulative absorption of moisture (for buildings exposed to moisture or damaged waterproofing, sandwich panels that have been used for a long time, and sandwich panels that are poorly assembled, the moisture absorption and absorption amount is increased by several times the weight of the original foamed polystyrene foam. The larger the voids between the foamed EPS beads, the more the absorption is increased), thereby achieving the problem of reducing the insulation effect and reducing the weight increase.

In terms of the absorption of expanded polystyrene foam, no moisture penetrates into the expanded EPS beads, but the expanded EPS beads have a waterproofing effect and the progress of absorption of the expanded polystyrene foam is a small gap between the expanded EPS beads and the beads. Moisture penetrates and the water continues to accumulate depending on the climatic environment and conditions of use.

The amount of absorption and penetration varies depending on the product, and depends on the density, degree of fusion, timing of exposure to moisture, particle size, and water pressure of the expanded polystyrene foam, and the capillary action is caused by the small gap between the pores and joints between the expanded EPS beads and beads. Absorption and storage of water continues, and the absorbed water is isolated from the outside, which delays external release and accumulates more water.

Therefore, the expanded EPS beads, which form the outer wall of the moisture accumulated continuously by the capillary action, form a water repellent (acting as a water repellent barrier) delay film and block the evaporation of water to the outside. In some cases, it may increase to 100 to 1000% of the specific gravity (weight) of the expanded polystyrene foam at the beginning of the product shipment, which lasts for the life of the building and leads to the loss of energy. In addition, it freezes in the winter and the frozen state may be maintained until the summer. Therefore, the thermal conductivity increases, thereby increasing the weight of the building due to the decrease in insulation performance and the increase in specific gravity.

In addition, in the case of foam polystyrene foam used as external insulation method (dry bit method) of building, it minimizes steam foam residual moisture and residual foam gas in order to reduce deformation after construction, so deformation after construction and defect of climate change can be reduced. Maintaining production and aging periods Expansion of aging drying space leads to an increase in production cost of goods, making it difficult to use prescribed products that have been matured. Shrinkage expansion due to post-foaming deformation of residual gas and freeze-drying of residual and infiltrating moisture causes cracks. This shortens the service life of the external insulation method (dry bit method).

Accordingly, in the present invention, the moisture accumulated in the zeolite is gradually discharged into the air by using the water discharge promoting function of the zeolite to increase the deformation durability of the expanded polystyrene foam, improve the decrease in thermal insulation performance due to the accumulation of moisture, The weight gain was improved and the residual discharge of moisture accumulated in the forming vapor pressure process was also shortened.

In addition, foam polystyrene foam works using various cutting saws such as molding and carving of buildings, dry bit processing, internal and external insulation, sandwich panel shape processing, woodworking, sculpture processing, and other industrial shape processing. Suspended fly ash pollution of the expanded polystyrene foam powder (powder) generated in the process has caused problems such as electrostatic adhesion of the environmental pollution machinery in the workability degradation workplace. Therefore, this problem has been solved by adding zeolite to the manufacturing process of the present invention to remove static electricity by using the ion exchange function of the zeolite as a solution for this. Therefore, the scattering of the dust powder in the cutting process is improved to be constantly falling to the bottom and collected.

In addition, by using the catalytic reaction characteristic of the gas of the zeolite, the foamed gas remaining in the EPS beads as a catalytic reaction removal method for removing residual EPS foaming gas (residual pentane or butane gas having a very high fuel index) after foamed polystyrene foam molding. By removing the finished flame retardant foam polystyrene foam to further increase the flame retardant performance.

The amount of residual gas in the finished product after the primary foaming-drying-aging-secondary foaming with the amount of foaming pentane gas in the EPS raw material (raw raw material before foaming) is 100 depends on the expansion ratio and the aging time, In this case, approximately 35 to 55% of pentane gas remains.

In addition, the water content due to steam (steam) foaming remaining in the finished product after foam molding is 10 to 25%.

Moisture is difficult to penetrate inside the EPS bead foam, but air can be ventilated. Therefore, it is possible to remove residual gas using the zeolite catalyst method, and in particular, the gas adsorption function and the ion exchange function using the zeolite pores effectively discharge the residual gas. Flame retardant performance is further improved.

As another example, after installing the multi-functional flame-retardant polystyrene foam in which the zeolite is added to the isolated space on the wall and the ceiling, it is exposed to ammonia gas (25 ° C./48 hours) and the reduction effect is confirmed. It was confirmed to exert.

In addition, in the case of mixing and using zeolite which is more useful for removing nitrogen oxide gas from the zeolite group, the function of removing nitrogen oxide (NOx) gas, which is a harmful substance in the air, was better.

In addition, the far-infrared emissivity of natural zeolite has a 93% emissivity which is similar to that of elvan. In the case of using natural zeolite, the particle size suitable for the present invention is suitable for the microparticles processed into 200-300 mesh, and is suitable for the purpose of using the multifunctional flame-retardant expanded polystyrene foam The addition amount is selectively added to 10 to 30 parts by weight based on 100 parts by weight of the liquid silicate mixture of the present invention to the flame retardant composition production process to prepare a multifunctional flame-retardant expanded polystyrene foam.

In addition, the inorganic thickener used in the present invention is bentonite, and the bentonite that can be used in the flame retardant composition manufacturing process of the present invention includes montmorillonite-based silicate mineral bentonite, and zeolitic bentonite is a heavy metal. It is possible to use as a functional inorganic thickener due to its adsorption capacity, which is more suitable for the production of the multifunctional flame-retardant expanded polystyrene foam. The amount of the bentonite is 0.5 to 50 parts by weight based on 100 parts by weight of the liquid silicate mixture of the present invention, and more preferably 5 It is -20 weight part.

In particular, 30-50 parts by weight of zeolitic bentonite is added to 100 parts by weight of the liquid silicate mixture, and the multifunctional flame-retardant method of the present invention utilizes the adsorption of harmful substances such as heavy metal adsorption capacity of zeolitic bentonite. When foamed polystyrene foam is used as a buoy for aquaculture, it is possible to improve marine pollution using heavy metal adsorption.

When the amount of inorganic phosphorus-based flame retardant added to the flame retardant of the expanded polystyrene foam of the present invention is continuously increased, the thermal insulation performance is lowered. In the present invention, the inorganic porous insulating thermal insulation material is selected from at least one type of diatomaceous earth perlite. The amount is 0.5 to 30 parts by weight and preferably 10 to 20 parts by weight with respect to 100 parts by weight of the liquid silicate mixture of the present invention. If it is less than 10 parts by weight, the effect is insufficient, if more than 20 parts by weight cutting workability is disadvantageous.

Diatomaceous earth is a silicate mineral with more fine pores than activated carbon, which is effective in the production of the multifunctional foamed polystyrene foam of the present invention due to its increased flame retardant effect, adsorption of harmful substances, and humidity control, and a product having a specific gravity of 0.15 or less is more suitable.

The graphite used in the present invention uses thermally expanded graphite and ordinary graphite, which are suitable for the present invention for increasing the flame retardant effect by lowering the thermal conductivity as carbon particles to increase the thermal insulation effect and forming the carbonized film. When exposed, it expands rapidly, forms pores with the carbonized insulation layer (char), and forms a very effective barrier to block the propagation of the flame.

The suitable particle size of thermally expandable graphite used in the present invention is 50 to 200mesh is suitable, and the expansion ratio is more effective, and the thermal expansion is expanded at 100 ° C. and expands rapidly as temperature rises to form a carbonized void layer. Expansion volume is 50-400 ml / g. The use amount is 0.5-40 weight part with respect to 100 weight part of liquid silicate mixtures of this invention, Preferably it is 20-30 weight part. If it is less than 20 parts by weight of the flame retardant effect is insufficient, if more than 30 parts by weight cutting workability is disadvantageous.

As graphite used in the present invention, natural graphite, earthy graphite, artificial graphite can be used, and a product of 200-325 mesh is suitable. The amount used is 0.5 to 20 parts by weight with respect to 100 parts by weight of the liquid silicate mixture of the present invention, and suitably 5 to 15 parts by weight, depending on the purpose of electromagnetic shielding and the purpose of improving the flame retardancy, the amount of mixing is increased or decreased.

Examples of the present invention are shown below and the examples are not limited below.

The manufacturing apparatus uses a conventional foamed polystyrene foam manufacturing apparatus in the industry, the mixing kneading mixer section for coating the flame retardant composition on the foamed EPS beads ribbon blender in the cylindrical kneading hopper attached to the raw material supply and opening and closing device A general kneading mixer with an impeller, which is a mixing kneading mixer having a high pressure spray nozzle part for spraying flame retardant liquid through a plurality of high pressure spray nozzles, and the coated EPS bead hot air drying device is mounted on a horizontal rotating shaft operating at a low speed. The ribbon blender impeller is installed, and the cylindrical hopper forming the outside is a kneading drying device having an upper supply port and an outlet at the end of the cylindrical hopper made of a densely perforated metal plate. Tangle of coated EPS beads supplied from the hot air dryer and The device for removing the secondary and completing the second drying is provided with a circular feed hopper part on the upper surface thereof, and a metal perforated mesh or screen (seed mesh) perforated to a certain size is provided horizontally at the center of the supply hopper part. The vertical rotating shaft is installed and horizontally mounted impeller rotating at the top of the screen to release the entanglement is mounted on the rotating shaft, and the vibrator is mounted on the side of the feed hopper which forms the outline and the upper part of the mesh or screen (screen). To make EPS beads more easily fall, install a cylindrical conveying pipe made of metal mesh or metal perforated plate for conveying EPS beads gathered under the hopper and drying the secondary hot air, and then screw them to rotate at low speed. The hot air is supplied to the operating process to dry secondly, and blower air pressure is applied to the end of the blower. To be transferred between the storage aging.

The hot air temperature of the 1st and 2nd hot air drying process is controlled and supplied at 50 to 60 ° C., and is dried while maintaining the coated EPS beads without causing shrinkage deformation.

Therefore, the coated EPS beads improve the water resistance of the flame retardant composition mixed and coated with the present invention by steam heating in a hot air drying process and a secondary foam molding process maintaining 50 to 60 ° C.

The flame retardant composition used in the present invention is a flame retardant composition of the present invention made of a functional additive material for improving the flame retardancy of the foamed polystyrene foam of the present invention and diversifying its function.

More specifically, 0.5 to 20 parts by weight of inorganic flame retardant, 0.5 to 15 parts by weight of phosphorus flame retardant, 10 to 30 parts by weight of zeolite as a functional filler, heat insulation performance enhancement, flame retardant efficiency enhancement, electromagnetic wave blocking based on 100 parts by weight of the liquid silicate mixture of the present invention. 0.5 to 20 parts by weight of the desired graphite, 0.5 to 40 parts by weight of thermally expandable graphite, 0.5 to 50 parts by weight of bentonite classified as an inorganic thickener for the purpose of increasing the viscosity and increasing the flame retardant effect, and 0.5 to 30 parts by weight of the inorganic porous insulating material. The flame retardant composition of the present invention.

The liquid silicate mixture used in the present invention is a liquid silicate (Liquid Silicates) mixture used by adding and kneading potassium silicate or lithium silicate colloidal silica for the purpose of improving physical properties mainly based on liquid sodium silicate as follows. Called liquid silicate mixture and indicated.

The mixed composition of the liquid silicate (Liquid Silicates) mixture of the present invention is liquid potassium silicate (Liquid Potassium Silicates) 10 to 50 parts by weight of 100 parts by weight of liquid sodium silicate (Liquid Sodium Silicates) in the present invention for improving workability and water resistance Part by weight, or 0 to 20 parts by weight of lithium silicate (Lithium Silicates), 0 to 30 parts by weight of colloidal silica (Colloidal Silica) is prepared by mixing at least one kind and foamed because the mixed composition of liquid potassium silicate or lithium silicate colloidal silica The uniform coating process is performed on the surface of EPS beads, and the high pressure spraying workability of the kneading coating process is improved, the water resistance of Liquid Sodium Silicates is improved, and the water resistance is further improved through the subsequent heat drying process.

The liquid sodium silicate (Liquid Sodium Silicates) used in the present invention is classified into four types of one, two, three, and four kinds according to specific gravity, and all of them can be used in the present invention. Priest, Emerging Silica Co., Ltd.) three species showed better workability.

The liquid potassium silicate (Liquid Potassium Silicates) used in the present invention is classified according to the molar ratio and concentration, and can be used in the present invention. However, in terms of workability and physical properties, the liquid silicate of POSIL35, POSIL45 (Emerging Silica) Potassium was suitable.

Lithium silicate (Lithium Silicates) used in the present invention was suitable for products with a specific gravity (20 占 폚) of 1.16 (manufactured by Emerging Silicate) and a molar ratio of 4.5 to 5.

The colloidal silica used in the present invention is classified according to the molar ratio and the concentration of the product, and generally has a particle size of 1 to 100nm, does not settle and is stable in a solvent and has excellent dispersibility in the present invention. All of them can be used, but in consideration of workability and economical efficiency, a low-cost 10-20nm product (SOL30E, SOL40 / Emerging Silica) is more suitable.

Examples of the inorganic flame retardant used in the present invention include aluminum hydroxide, magnesium hydroxide boric acid, and aluminum hydroxide is economically advantageous, and workability and safety are good. The use amount is 0.5-20 weight part, More preferably, it is 5-15 weight part.

Examples of the phosphorus flame retardant used in the present invention include ammonium polyphosphate (AMMONIUM POLYPHOSHATE / APP), red, trichloroethyl phosphate (TCEP), trichloropropyl phosphate (TCPP) and the like. The use amount is 0.5-15 weight part of phosphorus flame retardants, More preferably, it is 5-10 weight part.

It demonstrates in detail as an Example and an Example of this invention is not limited below.

<Example 1>

Formulation Preparation of the Flame Retardant Composition of the Invention

Liquid Silicate Mixture 100 parts by weight ---- [Liquid Sodium Silicate 100: Liquid Potassium Silicate 30]

Aluminum hydroxide (inorganic flame retardant) 5 parts by weight --- [powder type / KH-17R KC Corporation]

Ammonium Polyphosphate (Phosphorus Flame Retardant) 5 parts by weight ------ [APP-1 powder type import goods]

Zeolite 15 parts by weight ----------------------- [4A type manufactured by Zeo Builder]

Bentonite (Inorganic thickener) 10 parts by weight ------------ [opazil-product made by Korea Suomi Kemi Co., Ltd.]

5 parts by weight of graphite --------------------------- [325mesh Soil Black Co., Ltd.]

20 parts by weight of expandable graphite -------------------- [80mesh manufactured by Kolmar Industries]

The liquid silicate mixture was a liquid silicate mixture prepared by mixing and mixing 30 parts by weight of Liquid Potassium Silicates (POSIL45) with respect to 100 parts by weight of three types of Liquid Sodium Silicates.

To 100 parts by weight of expanded EPS beads prepared by primary steam foaming and dry aging of EPS raw material before foaming; On the basis of the 110 parts by weight of the flame retardant composition prepared by the blending kneading, kneading coating and molding was completed in the above-described method of the present invention to prepare a multi-functional flame-retardant polystyrene foam.

<Example 2>

Formulation Preparation of the Flame Retardant Composition of the Invention

Liquid Silicate Mixture 100 parts by weight-[Liquid Sodium Silicate 100: Colloidal Silica 30]

Aluminum hydroxide (inorganic flame retardant) 5 parts by weight --- [powder type / KH-17R KC Corporation]

Zeolite 15 parts by weight ----------------------- [4A type manufactured by Zeo Builder]

Bentonite (Inorganic thickener) 5 parts by weight ------------ [opazil-made in Korea Soto Chemi Co., Ltd.]

Diatomite 15 ------------------------ [C281-325mesh Celite Korea]

5 parts by weight of graphite --------------------------- [325mesh Soil Black Co., Ltd.]

20 parts by weight of expandable graphite -------------------- [80mesh manufactured by Kolmar Industries]

The liquid silicate mixture used was a liquid silicate mixture formed by mixing and mixing 30 parts by weight of colloidal silica (Colloidal Silica / SOL30E / manufactured by Emerging Silica Co., Ltd.) with respect to 100 parts by weight of two types of liquid sodium silicate.

To 100 parts by weight of expanded EPS beads prepared by primary steam foaming and dry aging of EPS raw material before foaming; On the basis of the 110 parts by weight of the flame retardant composition prepared by the blending kneading, kneading coating and molding was completed in the above-described method of the present invention to prepare a multi-functional flame-retardant polystyrene foam.

<Example 3>

Formulation Preparation of the Flame Retardant Composition of the Invention

Liquid Silicate Mixture 100 parts by weight ---- [Liquid Sodium Silicate 100: Liquid Potassium Silicate 30]

Aluminum hydroxide (inorganic flame retardant) 5 parts by weight --- [powder type / KH-17R KC Corporation]

Ammonium Polyphosphate (Phosphorus Flame Retardant) 5 parts by weight ----- [APP-1 powder type import goods]

Zeolite 15 parts by weight --------------------- [4A type manufactured by Zeo Builder]

5 parts by weight of graphite ------------------------- [325 mesh earth black powder]

The liquid silicate mixture was a liquid silicate mixture formed by mixing and mixing 30 parts by weight of liquid potassium silicate (Liquid Potassium Silicates) with respect to 100 parts by weight of liquid sodium silicate.

To 100 parts by weight of expanded EPS beads prepared by primary steam foaming and dry aging of EPS raw material before foaming; Based on the 110 parts by weight of the flame retardant composition prepared by the mixing kneading, kneading coating and molding was completed in the above-described method of the present invention to prepare a multi-functional flame-retardant polystyrene foam.

<Example 4>

Formulation Preparation of the Flame Retardant Composition of the Invention

Liquid Silicate Mixture 100 parts by weight ---- [Liquid Sodium Silicate 100: Liquid Potassium Silicate 30]

Aluminum hydroxide (inorganic flame retardant) 5 parts by weight --- [powder type / KH-17R KC Corporation]

Zeolite 15 parts by weight --------------------- [4A type manufactured by Zeo Builder]

5 parts by weight of graphite ------------------------- [325 mesh earth black powder]

20 parts by weight of expandable graphite -------------------- [80mesh manufactured by Kolmar Industries]

The liquid silicate mixture was a liquid silicate mixture formed by mixing and mixing 30 parts by weight of liquid potassium silicate (Liquid Potassium Silicates) with respect to 100 parts by weight of liquid sodium silicate.

To 100 parts by weight of expanded EPS beads prepared by primary steam foaming and dry aging of EPS raw material before foaming; On the basis of the 110 parts by weight of the flame retardant composition prepared by the blending kneading, kneading coating and molding was completed in the above-described method of the present invention to prepare a multi-functional flame-retardant polystyrene foam.

<Example 5>

Formulation Preparation of the Flame Retardant Composition of the Invention

Liquid Silicate Mixture 100 parts by weight ---- [Liquid Sodium Silicate 100: Liquid Potassium Silicate 30]

Aluminum hydroxide (inorganic flame retardant) 5 parts by weight --- [powder type / KH-17R KC Corporation]

Zeolite 15 parts by weight --------------------- [4A type manufactured by Zeo Builder]

5 parts by weight of graphite -------------------------- [325mesh earth black coating agent]

The liquid silicate mixture was a liquid silicate mixture formed by mixing and mixing 30 parts by weight of liquid potassium silicate (Liquid Potassium Silicates) with respect to 100 parts by weight of liquid sodium silicate.

The compounding ratios of Examples 1 to 5 were based on the compounding ratios based on 100 parts by weight of the liquid silicate mixture of the present invention.

To 100 parts by weight of expanded EPS beads prepared by primary steam foaming and dry aging of EPS raw material before foaming; On the basis of the 110 parts by weight of the flame retardant composition prepared by the blending kneading, kneading coating and molding was completed in the above-described method of the present invention to prepare a multi-functional flame-retardant polystyrene foam.

The results of the combustion test and the physical property test of the molded products prepared in Examples 1 to 5 are shown in Table 1 and Table 2.

Table 1

Combustion test result

In the test, the size of the flame using butane GAS as the fire source was 15 mm (measured based on the blue flame) and the length of the flame was 120 mm (measured based on the blue flame). Examples 1 to 5 The molded product was installed vertically and heated directly at a distance of 100mm at a 90 ° angle. The heating time was 15 seconds, and then the combustion time of the residual flame time and the burning area were measured.

As can be seen in Table 1 it showed a very good flame retardant performance compared to the general foamed polystyrene foam.

[Table 2]

Property test result

As can be seen in Table 2, the water resistance is excellent, the scattering dust during the cutting process was improved and the electrostatic adhesion was improved.

In addition, it is possible to cut the hot wire to facilitate the molding process, lower the manufacturing cost and improve the scattering dust.

Compared with the general flame retardant styrofoam, the molding adhesion is excellent. Therefore, the compressive strength is improved, the surface shape is not damaged, the flame retardancy performance is improved, and various functionalities are given to improve the commercial property. You can expand the use.

Multifunctional flame-retardant foamed polystyrene foam of the present invention and the method of manufacturing the foamed polystyrene foam can achieve a variety of functions and expand the durability of flame-retardant physical properties and improve the water discharge function of the multi-functional flame-retardant foamed polystyrene foam of the present invention mixed and kneaded coating zeolite Therefore, the problem of reducing the insulation effect and the purpose of reducing the weight increase were achieved.

In addition, it is possible to reduce the deformation after construction of the expanded polystyrene foam used in the external heat insulation method (dry bit method) of the building and the defect of climate change, and to increase the production cost of goods caused by the expansion of the maturation drying space during the production and maintenance period. Can reduce.

In the work process using various cutting saws such as molding and engraving of foam polystyrene foam, dry bit processing, internal / external insulation attachment, shape processing for sandwich panels, wood processing, shape processing of sculpture works, and other industrial shape processing Improved electrostatic suspended fly-contamination of the foamed polystyrene foam powder (powder) generated, thereby reducing the workability, such as electrostatic adhesion of environmental pollution machinery in the workplace.

By using the catalytic reaction characteristics of the gas of zeolite, the foamed gas remaining in EPS beads is removed to complete the multi-functional flame-retardant polystyrene foam which further improves the flame retardant performance, and due to the steam (steam) foam remaining in the finished product after foaming The moisture content can be lowered further.

Multifunctional flame-retardant expanded polystyrene foam with zeolite bentonite graphite has added functions such as ammonia gas removal and harmful gas removal in the atmosphere, heavy metal adsorption removal and far infrared radiation shielding.

Claims (6)

In the production method of the multi-functional flame-retardant foam polystyrene foam, EPS beads (foamed resin), which is a foaming resin raw material, are first foamed by steam heating foaming part of a conventional foamed polystyrene foam manufacturing apparatus, and foamed by transporting through a drying process. Preparing the prepared EPS beads; 100 to 170 parts by weight of the flame retardant composition of the present invention according to the desired flame retardant grade by quantitatively supplying to the mixed kneading mixer for coating the flame retardant composition of the present invention on the basis of 100 parts by weight of foamed EPS beads And kneading for 5 to 10 minutes to uniformly coat the multifunctional flame retardant composition of the present invention on the foamed EPS beads; Removing the moisture of the flame retardant by kneading the coated EPS beads at a low temperature for 5 to 10 minutes in a hot air drying apparatus maintained at 50 to 60 ° C .; Removing the entanglement and adhesion of the coated EPS beads and drying the residual moisture of the coated EPS beads in a secondary hot air drying unit maintained at 50 to 60 ° C. to carry out storage storage aging between them; Putting the EPS beads, which have completed the coating process by storage aging for a predetermined time, into a molding machine, and performing secondary foam molding while maintaining a steam heating temperature at 98 ° C .; In order to improve the efficiency of removing residual moisture of foamed gas and foamed heated steam after molding, a degassing air conditioner equipped with activated carbon filter and zeolite filter is installed inside the drying aging chamber as a degassing device. Dry maturation in a dry aging room after molding to install 10 to 20 minutes; Drying aging for 2 to 3 days in a naturally dry aging field in a well ventilated condition; Cutting according to the use; Subsequently, in order to further improve the flame retardant performance of the expanded expanded polystyrene foam and to reduce the deformation of the product due to residual gas and residual moisture, a catalyst for removing residual EPS foam gas and residual moisture by using the catalytic reaction of the zeolite included in the flame retardant composition The ventilation method of the foamed polystyrene foam processed by the reaction method is smoothly formed and aged by degassing catalytic reaction using zeolite for 7 to 10 days, and the foamed vapor water remaining in the voids between the foamed gas remaining in the EPS beads and the beads is removed. Method of producing a multi-functional flame-retardant foam polystyrene foam characterized in that the product is completed by removing the residual gas removal catalytic reaction step to reduce the deformation of the product and further increase the flame retardant performance. In the multi-functional flame-retardant expanded polystyrene foam, EPS beads foamed by firstly foaming by adding EPS beads, which are resin materials for foaming, to the steam heated foaming part of a conventional foamed polystyrene foam manufacturing apparatus, followed by transfer aging through a drying process. Preparing (Beads); 100 parts by weight of foamed EPS beads are quantitatively supplied to the mixing kneading mixer for coating the flame retardant composition of the present invention on the basis of the quantitative formulation, and 100 to 170 parts by weight of the flame retardant composition according to the desired flame retardant grade is injected at a high pressure. Kneading for 10 minutes to uniformly coat the multifunctional flame retardant composition of the present invention on the foamed EPS beads; Removing the moisture of the flame retardant by kneading the coated EPS beads at a low temperature for 5 to 10 minutes in a hot air drying apparatus maintained at 50 to 60 ° C .; Removing the entanglement and adhesion of the coated EPS beads and drying the residual moisture of the coated EPS beads in a secondary hot air drying unit maintained at 50 to 60 ° C. to carry out storage storage aging between them; Putting the EPS beads, which have completed the coating process by storage aging for a predetermined time, into a molding machine and performing secondary foam molding while maintaining a steam heating temperature at 98 ° C .; In order to improve the efficiency of removing residual moisture of foamed gas and foamed heated steam after molding, a degassing air conditioner equipped with activated carbon filter and zeolite filter is installed inside the drying aging chamber as a degassing device. Dry maturation in a dry aging room after molding to install 10 to 20 minutes; Drying aging for 2 to 3 days in a naturally dry aging field in a well ventilated condition; Cutting according to the use; Subsequently, in order to further improve the flame retardant performance of the cut foamed polystyrene foam and to reduce the deformation of the product due to residual gas and residual moisture, the catalytic reaction to remove residual EPS foam gas and residual moisture by using the catalytic reaction of zeolite included in the flame retardant composition. Method to smoothly ventilate the foamed polystyrene foam that has been cut by the method, and matured by degassing catalytic reaction using zeolite for 7 to 10 days, and removes the foamed vapor water remaining in the voids between the foamed gas remaining in the EPS beads and the beads. Multi-functional flame-retardant polystyrene foam characterized in that the product is completed through the catalytic reaction step to reduce the deformation of the product and further increase the flame retardant performance. The method of claim 1, In the method for producing a multifunctional flame-retardant expanded polystyrene foam, the mixed composition of the liquid silicate mixture of the present invention is liquid potassium silicate (Liquid Potassium Silicates) 10 with respect to 100 parts by weight of liquid sodium silicate (Liquid Sodium Silicates) -50 parts by weight, or 0 to 20 parts by weight of lithium silicate (Lithium Silicates) Colloidal Silica (Colloidal Silica) 0 to 30 parts by weight of a multi-functional prepared by using the flame retardant composition of the present invention Method for producing flame retardant expanded polystyrene foam. The method of claim 2, In the multifunctional flame-retardant expanded polystyrene foam of the present invention, the mixed composition of the liquid silicate (Liquid Silicates) mixture of the present invention is based on 100 parts by weight of liquid sodium silicate (Liquid Potassium Silicates) 10-50 weight Multi-functional flame-retardant foamed polystyrene foam prepared by using the flame retardant composition of the present invention prepared by mixing one or more parts 0 to 20 parts by weight of lithium silicate (Lithium Silicates) 0 to 30 parts by weight of colloidal silica. The method of claim 1, In the method for producing a multifunctional flame-retardant expanded polystyrene foam, 0.5 to 20 parts by weight of inorganic flame retardant, 0.5 to 15 parts by weight of phosphorus flame retardant, 10 to 30 parts by weight of zeolite and 0.5 to 0.5 parts by weight of the liquid silicate mixture of the present invention. Multifunctional flame-retardant foamed polystyrene foam prepared by using the flame retardant composition of the present invention composed of -20 parts by weight, 0.5-40 parts by weight of thermally expandable graphite, 0.5-50 parts by weight of bentonite, and 0.5-30 parts by weight of an inorganic porous insulating material. Manufacturing method. The method of claim 2, In the multifunctional flame-retardant expanded polystyrene foam, 0.5 to 20 parts by weight of inorganic flame retardant, 0.5 to 15 parts by weight of phosphorus flame retardant, 10 to 30 parts by weight of zeolite, and 0.5 to 20 parts by weight of 100 parts by weight of the liquid silicate mixture of the present invention. A multi-functional flame-retardant polystyrene foam prepared using the flame retardant composition of the present invention, which is composed of parts, 0.5 to 40 parts by weight of thermally expandable graphite, 0.5 to 50 parts by weight of bentonite, and 0.5 to 30 parts by weight of an inorganic porous insulating material.

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