KR20100130123A - Expandable polystyrene - Google Patents

Abstract

PURPOSE: A high flame retardant treatment method of expandable polystyrene is provided to maintain bondability between foam particles and to improve flame retardant treatment efficiency. CONSTITUTION: A high flame retardant treatment method of expandable polystyrene using expanded graphite and/or loess adhesive comprises the steps of: forming micro hollows on the expandable polystyrene foam and mounting the expandable polystyrene foam on a worktable; welding a expandable graphite adhesive liquid injection chamber on the side of the expandable polystyrene foam; injecting expanded graphite adhesives inside the expandable polystyrene foam; stopping the supply of the expanded graphite adhesive; separating the expandable polystyrene foam from a feed chamber; separating the expandable polystyrene foam from the worktable; drying the expandable polystyrene foam.

Description

High flame retardant treatment of expanded polystyrene foam using expanded graphite and / or ocher adhesive and expanded polystyrene foam thereof

The present invention relates to a high flame-retardant treatment method of expanded polystyrene foam, and in detail, after forming the fine pores in a dense interval in the expanded polystyrene foam molded of foam particles and then expanded graphite And / or evenly inject and dry the ocher-containing (mixed) adhesive solution so that the expanded graphite and / or the ocher adhere (fix) to the surface and inside of the expanded polystyrene foam, thereby providing a high flame retardancy of about 300 ° C. or more. It is to be maintained.

Generally, expandable polystyrene, which is a thermoplastic resin, is white, light, and has good transparency, and is excellent in water resistance, heat insulation, sound insulation, cushioning, and molding processability, such as packaging materials, building materials, buoyancy materials, ornaments, insulation materials, and daily necessities. Widely used throughout the industry.

The foamed polystyrene is made of a foamed resin by adding a foaming agent such as pentane or butane to a polystyrene resin polymerized with a styrene monomer and generating a bubble at the same time. About 98% of the volume is air and the remaining 2% is a resin. Lightweight, excellent in water resistance, heat insulation, sound insulation and cushioning, it is widely used in various packaging containers, transport packaging materials, freezing warehouse walls, thermal insulation cold insulation materials, prefabricated buildings and walls and ceilings, but shrinkage deformation due to weak heat The large and small embers instantly change the overall shape, leading not only to large fires, but also causing a large amount of soot during combustion, causing a lot of lives to be killed.

On the other hand, as a method mainly used for flame retardation of polystyrene foam foaming agents, halogen compounds, metal hydroxides, metal oxides (Al (OH) ₃ , Mg (OH) _2, etc.), halogen phosphate ester compounds, etc. In addition, a foamed polystyrene foam having a predetermined shape is added. In this case, since the flame retardant must be added in a large amount in order to increase the flame retardancy, the mechanical properties of the polystyrene resin, such as tensile strength and impact strength, are greatly reduced.

In addition, in the case of manufacturing expanded polystyrene foam by coating and drying the adhesive liquid on the surface of the expanded particle (bead), which is a raw material of the expanded polystyrene, the price of the expanded particle is high, causing a price increase factor of the expanded polystyrene foam, and an excessive investment cost and productivity. There is a falling issue.

In addition, when the adhesive liquid is injected into the surface and the inside of the foamed polystyrene foam molded into a predetermined shape, the adhesive liquid is concentrated only around the syringe, so the quality is reduced due to the flame retardancy and non-uniformity. There is this.

In addition, when expanded graphite is coated and dried on the surface of the expanded particles used to form expanded polystyrene, and then secondly foamed to obtain a flame retardant polystyrene foam, the distance between the expanded graphite becomes wider due to expansion of the expanded particles and the distribution and flame retardant efficiency are increased. There is a problem of falling, there was a problem such as the bonding strength between the second-expanded foam particles falling.

The present invention is a post-treatment by a method of densely forming fine pores in the expanded polystyrene foam molded from the expanded particles, not the expanded particles, and then forcibly apply (mixed) adhesive liquid containing expanded graphite and / or loess in the form of fine particles. By injecting and drying, the expanded graphite and / or ocher fine particles are evenly distributed and adhered to the surface and inside of the foamed polystyrene foam, thereby maintaining the bonding force between the foamed particles, and excellent workability and convenience, Oxygen (O ₂ ) inflow is blocked by expanded graphite which expands rapidly (200 ~ 250 times volume expansion) during combustion, and soot generation is suppressed by yellow soil, so high flame retardancy is maintained. It is an object to provide a high flame retardant treatment method of the expanded polystyrene foam.

Another object of the present invention is to provide a high flame retardant polystyrene foam prepared by the high flame retardant treatment method.

Another object of the present invention is to form a fine hole (0.5 mm ~ 2 mm size) at a tight interval (for example, 3 mm ~ 15 mm intervals) to the inside of the expanded polystyrene foam molded with foam particles using a needle punching machine (Post-treatment) It is characterized in that the flame-retardant treatment efficiency is greatly improved by allowing the expanded graphite and / or loess-containing adhesive liquid to be injected more easily and solidified.

Another object of the present invention is to produce a flame-retardant expanded polystyrene foam, the high flame retardancy (or high flame retardancy) in which the adhesive liquid containing expanded graphite and / or ocher penetrates deeply and evenly into the expanded polystyrene foam by ultrasonic action. It is characterized by providing a foamed polystyrene foam.

In the present invention, the injection of expanded graphite and / or ocher adhesive liquid is achieved by high pressure injection or vacuum suction.

In the case of high-pressure injection, forming a fine hole (0.5 mm ~ 2 mm size) of dense intervals (3 mm ~ 15 mm intervals) in the foamed polystyrene foam molded of foam particles and then placed on the work table to prepare; Bonding the expanded graphite and / or ocher adhesive injection chamber to one side of the expanded polystyrene foam to be sealed; Supplying the expanded graphite and / or ocher adhesive liquid at a constant temperature to the injection chamber at a high pressure; Injecting the high pressure expanded graphite and / or ocher adhesive into the foamed polystyrene foam into the injection chamber; Stopping supply of expanded graphite and / or ocher adhesive liquid supplied to the injection chamber; Separating the injection chamber from the expanded polystyrene foam; Separating the expanded polystyrene foam into which expanded graphite and / or ocher adhesive is injected from a work bench; Drying the expanded polystyrene foam separated from the work table at a predetermined temperature for a predetermined time; .

In addition, in the case of vacuum suction, forming a fine hole (0.5 mm ~ 2 mm size) of dense intervals (3 mm ~ 15 mm intervals) in the molded foam polystyrene foam and then placed on the work table to prepare; Bonding a vacuum chamber to the opposite side of the expanded polystyrene foam impregnated with expanded graphite and / or ocher adhesive liquid which is kept at a constant temperature; Vacuuming the vacuum chamber with a vacuum pump; Expanding the expanded graphite and / or ocher adhesive into the expanded polystyrene foam by the vacuum of the vacuum chamber; Stopping vacuum suction of the expanded graphite and / or ocher adhesive; Separating the vacuum chamber from the expanded polystyrene foam; Separating the expanded polystyrene foam into which the expanded graphite and / or ocher adhesive is injected from a work table; Drying the expanded polystyrene foam separated from the work table at a predetermined temperature for a predetermined time; .

The viscosity of the adhesive solution is about the same as or similar to that of the flame retardant that is commonly used to be easily injected or sucked into the expanded polystyrene foam.

The adhesive solution is water-soluble or alcoholic, and is a liquid in which expanded graphite or ocher or expanded graphite and ocher are mixed at a predetermined ratio.

The ocher mixed in the adhesive liquid is a fine particle of 200mesh ~ 1,000mesh, expanded graphite is a fine particle of 60mesh ~ 150mesh, the temperature of the adhesive solution is maintained at a constant temperature of 30 ℃ ~ 80 ℃.

The injection pressure of the expanded graphite and / or ocher adhesive liquid is 0.5 ~ 6㎏ / ㎠, the vacuum suction input is 10 ~ 1torr.

According to the present invention, the expanded graphite and / or ocher adhesive is injected into the expanded polystyrene foam by high-pressure injection or vacuum suction by forming numerous micropores having a predetermined depth and a predetermined interval in the expanded foamed polystyrene foam, and thus expanded graphite and / or ocher The adhesive liquid is evenly and deeply penetrated not only on the surface of the expanded polystyrene foam, such as between the foam particles and the foam particles, and the holes (fine gaps) of the foam particles, thereby expanding the expanded graphite into the foam particles structure. And / or high-flammability and semi-combustible expanded polystyrene foam which does not burn (ignite) or change significantly after exposure for 10 minutes at a direct flame temperature of about 1,000 ° C., while occupying 50% to 70% of space by introducing ocher fine particles. .

In addition, the heat resistance is higher than about 1,000 ° C. by expanded graphite and / or ocher adhered to the expanded polystyrene foam by high pressure injection or vacuum suction, and the form is released from the expanded polystyrene foam by the action of loess. Almost all of the amount of aldehyde is removed or greatly reduced to solve environmental problems such as sick house syndrome, and the adhesive solution is water-soluble, alcohol-based or inorganic, without the use of organic solvents, so there is no toxic gas or dust. Harmless to human body

The present invention is highly flame-retardant (highly flame-resistant) foamed by high pressure injection or vacuum suction type, because the expanded graphite and / or loess adhesive liquid deeply and evenly penetrates into the inside of the foamed polystyrene foam, It is effective to obtain polystyrene foam.

In addition, the present invention evenly infiltrate the expanded graphite and / or ocher adhesive liquid into the inside of the expanded polystyrene foam formed by the fine hole formed by the needle punching machine, the loess suppresses the generation of soot and generates a large amount of far infrared rays It has a beneficial effect on the surroundings and the human body, and the carbon dioxide (CO ₂ ) film is formed by the rapid and rapid expansion of the expanded graphite has the effect of self-extinguishing by blocking the inflow of external oxygen (O ₂ ).

In addition, the present invention is expanded graphite and / or ocher fine particles introduced into the structure through the micro-pores formed in the foam particles occupy more than 50% (50% ~ 70%) of the space of the foam particles, the direct ignition of about 1,000 ℃ There is an effect of obtaining a highly flame-retardant and semi-combustible expanded polystyrene foam that does not burn (ignite) or change significantly even when exposed to temperature for 10 minutes.

In addition, since the present invention uses the natural material ocher, it is environmentally friendly, has high thermal insulation, high soundproofing, dustproof, and high moisture resistance, and has the effect of emitting far-infrared rays, which is beneficial to the human body, for air purification, insect repellency, and human body.

In addition, the present invention has the effect that the problem of environmental pollution, such as sick house syndrome, because the amount of formaldehyde released from the expanded polystyrene foam by the action of the ocher is almost eliminated or greatly reduced.

In addition, the expanded graphite and / or ocher adhesive liquid of the present invention is water-soluble or alcohol-based or inorganic, which does not use an organic solvent, so that no toxic gas or dust is generated, which is harmless to the human body and does not generate a pollutant.

In addition, the expanded polystyrene foam of the present invention is prevented by rapid fire expansion due to the low temperature thermal decomposition of the core material by the high flame retardancy, there is an effect that effectively prevents the shape collapse due to melting of the expanded polystyrene foam.

In addition, the present invention is safe, easy to work and excellent because the forced graphite or / ocher adhesive is injected into the polystyrene foam by a predetermined pressure or vacuum suction input, or forced to suck the flame retardant treatment, and the cost of equipment investment costs, etc. There is a saving effect.

In the present invention, when forcibly injecting the expanded graphite and / or ocher adhesive liquid, when the expanded graphite and / or ocher adhesive liquid is vibrated by an ultrasonic vibrator, the surface tension is weakened by the surface activity to the expanded particles of the expanded polystyrene foam It penetrates uniformly and deeply so that the flame retardancy is excellent.

In addition, in the present invention, by forming the fine pores with a tightly spaced space up to a predetermined depth (approximately 2/3 depth) of the foamed polystyrene foam by needle punching, the adhesive liquid penetrates more easily and the flame retardant treatment efficiency is further improved. There is a very useful invention.

In describing the present invention, the same elements in the drawings are denoted by the same reference numerals as much as possible, and detailed descriptions of related well-known structures or functions will be omitted in order not to obscure the subject matter of the present invention.

The present invention forms fine pores in the foamed polystyrene foam formed by using a needle punching machine at a tight interval, and then injects and sucks the adhesive solution at 30 ° C. to 80 ° C., which contains expanded graphite and / or ocher, so as to be solidified. As carbon dioxide (CO ₂ ) film is formed by expanded graphite (200 ~ 250 times volume expansion at temperature above 700 ℃) which is rapidly expanded by combustion heat, oxygen (O ₂ ) inflow is blocked and self-extinguish, A large amount of far infrared rays are generated, soot generation is suppressed, and a high flame retardancy is achieved.

Preferred embodiments of the present invention are as follows.

1. Preparation of expanded graphite and / or ocher adhesive

a). Manufacture of expanded graphite adhesive

Highly flame-retardant expanded graphite adhesive solution is obtained by uniformly mixing 3% to 30% of expanded graphite in the form of fine particles with 97% to 70% of an aqueous adhesive solution or an alcohol-based adhesive solution, respectively.

b). Manufacture of expanded graphite and ocher adhesive

Highly flame retardant expanded graphite by evenly mixing 96% to 50% of water-soluble adhesive liquid or alcohol-based adhesive liquid in the weight ratio of 3% to 20% of fine yellow soil and 3% to 30% of expanded graphite in particulate state And ocher adhesive liquids.

As the water base adhesive solution, an acrylic resin, an α-olefin resin, an urethane resin, an ether cellulose, an ethylene-vinyl acetate emulsion, Ethylene-Vinylacetate copolymer emulsion, Epoxy resin, Polyvinyl acetate emulsion, Polyvinyl Chloride (PVC), Silicone (Silicone adhesives), Water based polymer (isocyanate) -isocyanate, Styrene-butadiene rubber latex, Phenolic resin, Polyimide, Polyvinyl acetate solvent type (PVAc), Polystyrene resin type, PS), polyvinyl alcohol (Polyvinylalcohol, PVAl), polyvinyl pyrrolidone resin (Polyvinylpyrrolidone, PVP), polyvinyl butyral resin (Polyvinylbutyral, PVB), melamine resin (Melamine resi n), urea resin (UF), resorcinol resin, water-based, melamine resin, water-based polymer-isocyanate, polystyrene resin type, PS), an inorganic binder, and the like, and one or at least one of them is mixed.

Also, alcohol-based adhesives include PVA (Polyvinylalcohol), EVA (Ethylenevinylalcohol), Ether-based cellulose, Ethylene-Vinylacetate copolymer emulsion, Phenolic resin, Examples of polyvinyl acetate resin type (Polyvinyl acetate solvent type (PVAc), polystyrene type (Polystyrene type, PS), polyvinyl butyral resin type (Polyvinylbutyral, PVB), etc., one or at least one of them are mixed do.

Acrylic resins are acrylic adhesives (CH2 = CHCOOH) and dielectrics as liquid components. Reaction system. The first generation (FGA) that involves chemical reactions during curing and bonding process, the second generation (SGA) that undergoes polymerization reaction, and the curing of radical polymerization by energy irradiation of urethane acrylate and epoxy acrylate with ultraviolet light Is called the third generation (TGA). At present, SGA two-part type which separates main ingredient liquid and hardening accelerator is the mainstream. Mixing them causes redox polymerization (a type of radical polymerization) to cure and bond. The liquid and the curing agent are alternately applied to the adherend to be bonded, and then pressed and bonded. It is excellent in chemical resistance and physical properties, adhered at room temperature or lower, and can be adhered even if there is some oil film on the surface of the adherend. It is used in many fields such as electrical and electronic goods, vehicles, architecture, and metals. It is also considered as a structural adhesive due to its excellent durability.

(alpha) -olefin type ((alpha) -Olefin resin) The adhesive which has a copolymer component of isobutylene and maleic anhydride which is a kind of alpha-olefin as a main component. Solution system (water system). A curing agent is added to the liquid to which fillers, such as calcium hydroxide, latex, and a metal oxide, were added to the copolymer resin aqueous solution, and it hardens | cures and adheres. Along with evaporation of the solvent, crosslinking with calcium hydroxide occurs, thereby improving adhesion. It is used for plywood, woodworking products and building construction from the process developed as wood adhesive which is excellent in heat resistance and creep resistance and does not use formaldehyde. The room temperature curing type is strongly alkaline above pH 12, so it is necessary to pay attention to the contamination of wood. Neutral type requires heating to cure. Moreover, (alpha)-olefin maleic anhydride resin can be used also for the protective colloid of an emulsion and latex.

Polyurethane resin is a generic term for adhesives having a urethane group -NHCOO-. In a broad sense, it includes an adhesive derived from an isocyanate group (NCO-) or a hydroxyl group (OH-) and compounded. Reaction system. The raw material can be selected from many kinds, and can further impart various physical properties through the additive. In the two-component type, a polyol having a hydroxyl group at the end and a polyisocyanate or a urethane prepolymer having an isocyanate group at the end are mixed and mixed to cause a chemical reaction to cure and adhere. Although room temperature adhesion is possible, adhesive strength can be raised by heating. It is excellent in weather resistance, oil resistance, and cold resistance, and is used for bonding laminate films for food packaging for structural materials such as metals, ceramics and plastics. One-part type hardens and bonds by mixing or heating a mixture of a urethane prepolymer and a catalyst. It is used for industrial and construction, and especially in the commercial field, it is replacing the two-component epoxy resin adhesive. If the sealing is insufficient, troubles such as hardening of the liquid surface tend to occur, so it is necessary to pay attention to storage.

Ether cellulose is an adhesive based on ether derivative cellulose. A kind of cellulose adhesive. Methylcellulose (MC) and carboxymethyl cellulose (Sodium Carboxymethylcellulose, CMC) are used as adhesives. Solution system (water system). MC aqueous solution has a viscosity in an initial state, and forms an elastic film after hardening. Used for wallpaper bonding or leather. CMC aqueous solution, which is a kind of food thickener, has viscosity and thickening property and is used in the field of fiber or paper bonding.

Ethylene-vinyl acetate resin emulsion (Ethylene-Vinylacetate copolymer emulsion) is an adhesive mainly containing an emulsion of a resin copolymerized with ethylene vinyl alcohol (EVA) and vinyl acetate. 10% to 30% of an ethylene monomer is mixed with a vinyl acetate monomer, emulsion-polymerized under high pressure, and a turbid aqueous solution is emulsified. It has excellent water resistance, weather resistance, alkali resistance and fast adhesion speed than emulsion of vinyl acetate resin monomer, and is therefore also used for bonding synthetic resins such as lamination using mortar admixtures, plastic sheets, and the like in bookbinding, umbilical cord and the like. In order to improve adhesive force and workability, many organic solvents were added, but in order to cope with environmental problems, a solvent-free type is also recently developed.

Epoxy resin is an adhesive based on epoxy resin. Reaction system. When a curing agent such as an amine is added to the epoxy resin prepolymer obtained by condensation reaction between bisphenol A and epichlorohydrin, graft polymerization occurs to cure and adhere over time. It has high initial adhesiveness and is generally excellent in water resistance, moisture resistance, chemical resistance, electrical insulation, etc., and has excellent strength and heat resistance regardless of the type of adherend. Moreover, adhesive performance can be designed variously by selecting the type of epoxy resin or the kind of hardening | curing agent. Starting with space aircraft, it is used in fields requiring high reliability, such as civil engineering, construction, electrical and electronic components, and automobiles. The adhesion method is dependent on the choice of curing agent, and in order to achieve room temperature curing, two liquids containing polyamide, aromatic sulfonic acid, or the like as a curing agent are used. When aromatic amines or the like are used, they become thermosetting and can be monolithic. In order to improve the desorption resistance and impact resistance, polymers such as nylon and isocyanate are widely used as structural adhesives. Epoxy clock conductive adhesive is prepared by adding precious metal powder to one-component epoxy resin adhesive. The metal used is rich in silver powder and is used for metal bonding as a solder substitute.

Polyvinyl chloride solvent type (PVC) is PVC resin adhesive and PVC dope cement. Solution system. Gel-like liquid in which a copolymer with a resin monomer or vinyl acetate is dissolved in a solution. The type in which nitrile rubber is added to the solution is used for vinyl chloride pipe joints and the like for bonding vinyl chloride resin. In particular, a plasticizer with a vinyl chloride resin having a small particle diameter is called a vinyl chloride sol and is used for metal bonding applications.

A polyvinyl acetate emulsion is a milky white aqueous solution in which an emulsion of polyvinyl acetate is emulsified by emulsifying and polymerizing a Povar or the like as a protective colloid. By evaporation of water, the particles of the resin are fused to harden and adhere to a transparent film. In response to environmental problems, types that do not use phthalic esters of plasticizers have been developed. Although it is inexpensive, it is easy to apply | coat, and it can respond to various uses by changing the composition of a polymer, in order to be inferior to heat resistance, water resistance, and solvent resistance, it may mix with other resin for the purpose of such improvement. Used for bonding paper, fiber, woodworking, plywood, etc., commercial woodworking bonds are very familiar.

Polychloroprene rubber (CR) is a contact-type adhesive, which is mainly composed of chloroprene rubber [(-CH2-CCI = CH-CH2-) n] and phenolic resin. Solution system. A liquid with strong adhesion, added with alkyl phenol resins and dissolved in a solvent in order to improve workability while utilizing the good adhesion properties of chloroprene rubber. Can be adhered to (contact bonding). It is widely used for industrial purposes from its ease of use and high performance, and is familiar as a yellowish brown adhesive in a tube at home. In order to further improve heat resistance and durability, a polyisocyanate compound is added and used. The functional endowment is for bonding soft vinyl chloride resin obtained by graft polymerization with methyl methacrylate.

Silicone adhesives are adhesives based on organopolysiloxanes. There are condensation curing type and addition curing type. Reaction system. Condensation hardening type is a liquid or paste form which mixed the organopolysiloxane which has a hydroxyl group at the terminal, and a crosslinking agent. After application, it is reacted with moisture in the air to start curing from the surface, finally forming a hardened layer with rubber elasticity. It is necessary to select the kind according to the use situation classified according to the kind of glass gas which arises at the time of condensation reaction. The form and main uses include a jadeite type (general purpose), a deacetic acid type (glass adhesion), a deacetone type (for electronic and electrical), an amide type (architecture) and the like. The addition curing type is a two-component type divided into an organopolysiloxane having a vinyl group at its terminal and a crosslinking agent. It hardens | cures and adhere | attaches by heating using a catalyst. The curing speed is faster than the condensation curing type, and there is no generation of free gas.

Modified Silicone adhesives are adhesives based on polypropylene oxide (modified silicone) having a methyldimethoxysilyl group at its end. Reaction system. Liquid with additives added to the modified silicone polymer. The alkoxy silyl group hydrolyzes by moisture in the air, and hardens and adheres relatively quickly while causing a condensation reaction. Since it has a high strength and does not lose rubber elasticity, the distortion generated during curing can be eliminated. It is strong in shock and is widely used as an adhesive for use in the construction field and everyday home. One-component type | mold can be divided into a modified silicone type, an epoxy modified silicone type, and an acrylic modified silicone type. Each has a different value for shear stress or release force. In the two-component type, the epoxy resin and the organic tin catalyst are made of A agent, and the curing agent for modified silicone resin and epoxy resin is B agent. The hardness can be adjusted by changing the mixing ratio.

Water based polymer-isocyanate is also called an aqueous vinyl urethane-based wood adhesive. Adhesives based on aqueous solutions or emulsion solutions of various hydrophilic polymers and isocyanate compounds as crosslinking agents. Solution system (water system) with the property of water dispersion system. A polyfunctional isocyanate or a prepolymer thereof dissolved in paraffin chloride or the like is added to a polymer aqueous solution or an emulsion solution to which a filler such as calcium carbonate is added to cure and adhere over time. At the beginning of development, it was called aqueous vinylurethane. The curing process is classified into one kind that proceeds to room temperature and two kinds that require heating. It is a water-based adhesive that is excellent in water resistance and does not contain formaldehyde. Wood is mainly used for bonding, and it is also used for complex bonding with plastics, metals, and rubber.

Styrene-butadiene rubber solution (Styrene-butadiene rubber) is SBR-based, SBS-based or SIS-based adhesives. Adhesive based on copolymer of styrene and butadiene. There are two types due to the difference in the polymerization reaction. Solution system. Random copolymerized SBR has a natural rubbery property, and the solvent solution is used as an adhesive, but the adhesive strength is not strong. Block copolymerized SBR has the property of vulcanized rubber. Solvent solutions are used to bond rubber, glass, metal, and foamed styrols with the addition of imparting agents. As the solute rubber, styrene-butadiene block copolymer (SBS) or styrene-isoprene block copolymer (SIS) is also used.

Styrene-butadiene rubber latex is an adhesive mainly composed of a copolymer of styrene and butadiene on latex. Water dispersion system. Milky liquid. Styrene ratios less than 50% (SBR latex) are mainly used for carbocysylated SBR latex (c-SBR) or copolymerization with vinyl virine, and for flooring adhesives such as carpets and fiber cord adhesives for tires. Styrene ratios of 50% or more (SB latex) are relatively light in color and are used in the field of paper coating.

Nitrile rubber (NBR) is a liquid in which nitrile rubber is dissolved in a solvent. Solution system. Phenolic resin type is used for brake lining, metal, wood and leather because of its excellent oil resistance and solvent resistance. The type which mix | blended polyvinyl chloride is used for film adhesion etc.

Nitrocellulose is one of the ester derivatives of cellulose. Adhesive based on nitrocellulose (nitrogenated cotton). It is classified as a kind of cellulose adhesive. A liquid in which nitrocellulose is dissolved in a solvent. Since it is quick to dry and harden and is suitable for bonding leather, paper, wood, ceramics and the like, it is sold as a tubular household adhesive. Although it is inexpensive, it is easy to discolor and flammable, so care must be taken with handling.

Phenolic resin is an adhesive based on a resorre type phenolic resin. Solution system (water system, formaldehyde system). Aqueous solution or alcohol solution of phenol and formaldehyde subjected to condensation reaction. It heats to 130 degreeC or more, hardens | cures, and adhere | attaches. Although the alcohol type can be adhesive at room temperature, it is necessary to add a curing agent separately, which is inferior in workability. It is excellent in water resistance, heat resistance and weather resistance, but weak in impact and strength. Moreover, since the heating temperature is high and the adhesive discolors to reddish brown after curing, the use range is limited. However, it has high adhesive strength to various adherends such as wood, metal and glass, and is used for ships or concrete panels.

Polyimide (Polyimide) is an adhesive containing a low molecular polymer of the polyimide (PI) type belonging to an aromatic heterocyclic polymer as a main component. It is classified as a kind of polyaromatic adhesive. Reaction system. Properties obtained by impregnating glass fiber with a liquid obtained by dissolving polyamide carboxylic acid in dimethylacetaldehyde. While heating to 400 ° C. or higher to remove the solvent, dehydration ring closure reaction occurs in the process to imidize, cure and bond. As an adhesive, it corresponds to the highest level. It has heat resistance of 350 degreeC or more, and is excellent also in oxidation resistance. Demand is growing in the aerospace and electrical industries.

Polyvinyl acetate resin type (Polyvinyl acetate solvent type, PVAc) is a PVAc adhesive. Adhesive based on vinyl acetate resin. Solution system. A liquid having a viscosity obtained by dissolving a vinyl acetate polymer in alcohol. Some resins are filled with other resins for modification. It is excellent in durability but inferior in water resistance and creep resistance. It is suitable for adhesion of foamed styrol because it does not contain soluble components including wood, so it is used for building materials, boards and the like.

Polystyrene solvent type (PS) is PS resin adhesive and PS dope cement. Adhesive based on polystyrene resin. Solution system. A gel-like liquid in which resin is dissolved in a solvent such as acetone. It is mainly used as a pool for plastic models.

Polyvinyl alcohol system (Polyvinylalcohol, PVAl) is a water dispersion system. PVA used in the additive of an emulsion adhesive as an emulsifier has an adhesive force alone. When water evaporates, it forms a transparent film that hardens and bonds. Familiar with office liquid glue for woodworking and paper bonding applications. It is also known as a generally speaking laundry pool.

Polyvinylpyrrolidone resin system (Polyvinylpyrrolidone, PVP) is a solution system (aqueous) near solid. Sodium fatty acid is added to the water-soluble PVP to make it almost solid, and glycol type is added and activity is given. Usually, although viscosity is low, when viscosity is added when applying, it becomes viscous. By using this property, the stick paste formed in the rod shape is widely used for stationery and office work.

Polyvinyl butyral resin (Polyvinylbutyral, PVB) is an adhesive mainly containing polyvinyl butyral resin, which is a kind of polyvinyl alcohol. Reaction system. It hardens and adheres to the liquid which added sulfuric acid as a suspension to the methanol solution of polyvinyl alcohol by stirring, mixing butylaldehyde, heating. It has excellent transparency, light resistance, impact resistance and vibration resistance, and is used for safety glass of automobiles.

Polybenzimidazole system (Polybenzimidazole, PBI) is an adhesive mainly containing polybenzimidazole (PBI) belonging to an aromatic heterocyclic polymer. It is classified as a kind of polyaromatic adhesive. Reaction system. Properties of glass fiber impregnated with low molecular polymer of PBI. It is heated to about 350 ° C. to cure and adhere. As an adhesive, it corresponds to the highest level. With heat resistance of 350 ° C. or higher, demand is growing in the aerospace and electrical industries.

Polymethylmethacrylate solvent type (PMMA) is an adhesive mainly containing polymethacrylate resin. Solution system. Gel-like liquid in which resin is dissolved in solution. Although a solution has many solvents, such as acetone, there exists also a type using MMA monomer, chloro sulfonation polyethylene, etc.

Melamine resin is an adhesive based on melamine (cyanurylamide). Solution system (water system, formaldehyde system). A syrup-like aqueous solution obtained by adding a catalyst to melamine and formaldehyde subjected to condensation reaction. Since monomers are susceptible to precipitation and crystallization, they have been improved by co-condensation (MUF) with urea resins, co-condensation with phenolic resins (MPF), and melamine-phenol-free fish co-condensation (MPUF). Heat to 50 ~ 60 ℃ to cure and bond. It is excellent in durability and heat resistance, and is used as an adhesive for wood such as outdoor plywood.

Urea resin (UF) is an urea-based adhesive. Solution system (water system, formaldehyde system). A small amount of ammonium chloride is added as a curing agent to the urea reacted with the condensation reaction and a syrupy aqueous solution of formaldehyde, and cured and bonded. Solid concentrations are classified into concentrated and unconcentrated types. Concentrates of about 60% solids can be cured at room temperature, but unconcentrated solids of 40 to 50% solids need to be heated to solidify. Although slightly inferior in durability, it is used as an adhesive for wood such as plywood because of its water resistance, low cost and good workability.

Resorcinol resin is an adhesive which contains a resorcinol resin or a phenol-resorcinol resin as a main component. Solution system (water system, formaldehyde system). Paraformaldehyde powder is added as a curing agent, cured and adhered to an aqueous solution in which resorcinor and formaldehyde are condensed with an acid or an alkali as a catalyst and dissolved in water or alcohol. It is possible to bond at room temperature, but it is better bonded when heated to about 40 ° C. Although it is relatively expensive and the adhesive surface is blackish brown, it is excellent in durability and is used for structural materials such as plywood, woodworking products, musical instruments, wooden wires, etc. for wood bonding. Resorcinor and formaldehyde were condensed under alkaline conditions, and formalin, latex and the like were added thereto to react. An aqueous solution or a solvent solution of RFL (Resorcinol Formaldehyde Latex) is used for bonding a fiber cord of a tire.

The ocher is a fine size that can penetrate sufficiently between the fine pores formed in the foamed particles constituting the expanded polystyrene foam to be fixed to the internal structure, such as fine particles of 200 mesh to 1,000 mesh, such as flour, the expanded graphite is also 60 mesh ~ Fine particles of 150 mesh and fine like flour, they are forced into foamed polystyrene foam in a state of being heated to a temperature of 30 ° C. to 80 ° C. by a heat transfer heater having a constant temperature maintaining means, and then subjected to high flame retardancy.

When the mixing amount of the ocher and the expanded graphite is low, the flame retardant effect is decreased, when the amount of the flame retardant effect is increased, but the properties of the expanded polystyrene foam or the viscosity of the adhesive liquid rises, there is a problem in the injection and suction, so the adhesive liquid and the loess and / Or the mixing ratio of expanded graphite is suitably adjusted in the said range.

In the present invention, a predetermined surfactant (eg, alkylnaphthalenesulfonate, sodium dialkylsulfosuccinate, etc.) may be used within a range that does not change the physical properties of the expanded polystyrene foam to facilitate penetration of the adhesive liquid. Other additives known to help improve flame retardancy may be used in combination.

2. Injection of expanded graphite and / or ocher adhesive

In the present invention, the expanded graphite and / or ocher adhesive liquid forcibly injected into the expanded polystyrene foam molded into the foamed particles may be achieved by a high pressure injection method or a vacuum suction method.

For example, a method of injecting expanded graphite and / or ocher adhesive liquid at high pressure so as to pass through the expanded polystyrene foam (Example 1), and a method of vacuum inhaling the expanded graphite and / or ocher adhesive liquid into the expanded polystyrene foam ( Example 2) is exemplified.

a). Example 1 (high pressure injection type)

Forming fine pores (0.5 mm to 2 mm in size) of dense intervals (3 mm to 15 mm intervals) in the expanded polystyrene foam molded of foam particles, and then preparing them by placing them on a workbench;

Bonding the expanded graphite and / or ocher adhesive injection chamber to one side of the expanded polystyrene foam to be sealed;

Supplying expanded graphite and / or ocher adhesive liquid maintained at a constant temperature at a temperature of 30 ° C. to 80 ° C. to the injection chamber at a high pressure to be injected into the expanded polystyrene foam;

Stopping supply of expanded graphite and / or ocher adhesive liquid supplied to the injection chamber;

Separating the injection chamber from the expanded polystyrene foam;

Separating the expanded polystyrene foam from which the expanded graphite and / or ocher adhesive is injected and the injection chamber is separated from a work bench;

Adjusting the foamed restyrene foam separated from the work table at a predetermined temperature for a predetermined time;

Highly flame-retardant expanded polystyrene foam is obtained.

b). Example 2 (vacuum suction type)

Preparing by forming fine pores (0.5 mm to 2 mm in size) of dense intervals (3 mm to 15 mm intervals) in the expanded polystyrene foam molded into foam particles;

Impregnating the expanded polystyrene foam with the expanded graphite and / or the ocher adhesive solution for a predetermined time in the expanded graphite and / or the ocher adhesive solution maintained at a temperature of 30 ° C. to 80 ° C .;

Bonding a vacuum chamber to the opposite surface of the expanded polystyrene foam impregnated with the expanded graphite and / or the ocher adhesive;

Vacuuming the vacuum chamber with a vacuum pump;

Expanding the expanded graphite and / or ocher adhesive into the expanded polystyrene foam by the vacuum of the vacuum chamber;

Stopping inhalation of the expanded graphite and / or ocher adhesive;

Separating the vacuum chamber from the expanded polystyrene foam;

Separating the expanded polystyrene foam from which the expanded graphite and / or ocher adhesive is sucked and the vacuum chamber is separated from a work bench;

Adjusting the foamed restyrene foam separated from the work table at a predetermined temperature for a predetermined time;

Highly flame-retardant expanded polystyrene foam is obtained.

On the other hand, the loess used in the present invention is a natural loess in the form of microparticles, and is a commercially available commodity. Therefore, the process description of collecting the natural loess to remove foreign substances, sterilizing and then grinding and processing to obtain fine particles Is omitted.

The expanded graphite used in the present invention is also a commercially available product in the form of a fine powder, and therefore, a description of the manufacturing process is omitted.

The plane of the injection chamber and the vacuum chamber is about the same as or slightly smaller than the plane of the foamed polystyrene foam, and the injection chamber and the vacuum chamber are connected to a high pressure pump and a vacuum pump to inflate the expanded graphite and / or ocher adhesive at high pressure. Or vacuum suction.

In the present invention, in the case of high-pressure injection type (Example 1), the injection pressure of the expanded graphite and / or ocher adhesive liquid is 0.5 ~ 6kg / ㎠, depending on the thickness and density and size of the expanded polystyrene foam, the injection time is injected Depending on the pressure, the expanded graphite and / or ocher adhesive may range from a few seconds to several tens of seconds to allow sufficient infusion into the expanded polystyrene foam.

In the case of vacuum suction type (Example 2), it is preferable to maintain the vacuum degree of the vacuum chamber at 10-1 torr by using a vacuum pump so that the expanded graphite and / or the ocher adhesive liquid is sufficiently sucked into the expanded polystyrene foam.

Since the expanded polystyrene foam has a large surface tension at a general temperature, the surface tension of the expanded polystyrene foam is decreased by maintaining a constant temperature below a thermal deformation temperature, such as expanded graphite and / or an ocher adhesive at a temperature of 30 ° C. to 80 ° C. By expanding or disintegrating, the expanded graphite and / or ocher adhesive is deeply and evenly injected into the expanded polystyrene foam by the surfactant effect. Therefore, expanded graphite and / or ocher adhesive liquid is injected or sucked very effectively and adheres (fixes).

At this time, the needle punching machine formed a plurality of fine holes (0.5 mm to 2 mm in size) at close intervals (3 mm to 15 mm intervals) in the foamed polystyrene foam at a predetermined depth (about 2/3 depths). And / or ocher adhesive is more effectively injected and sucked evenly.

In the present invention, when a plurality of ultrasonic vibrators are installed in the injection chamber and injected or sucked while expanding the expanded graphite and / or ocher adhesive while ultrasonically vibrating, the surface tension of the entire expanded polystyrene foam including foam particles is further lowered or degraded to inject more effectively. And inhaled.

Drying of expanded polystyrene foam in which expanded graphite and / or ocher adhesive is injected and inhaled is put into a common dryer and warmed to a temperature within a range where physical properties do not change for a predetermined time, thereby decreasing moisture content, and expanding expanded graphite, loess, and solids. A flame retardant is coated on the surface of the foamed particles, some of which also flow into the interior space of the foamed particles and stick to the structure and settle.

In other words, the coated graphite and / or the expanded graphite and / or ocher adhesive liquid are dried, and the adhesive liquid and the ocher and flame retardant are separated from the surface of the foam particles of the skin-core structure and inside the foam particle space (inner structure). ) Is prevented from falling off as it enters and is fixed.

On the other hand, in the case of non-flame-retardant foamed polystyrene foam, even if exposed to heat for several seconds in direct heat of 60 ~ 80 ℃ thermal deformation occurs. The expanded polystyrene foam according to the present invention does not burn even when heated at a temperature of about 1,000 ° C. for 10 minutes with a torch.

In other words, the foamed polystyrene foam flame-treated by the present invention is a semi-combustible material that maintains flame retardancy up to about 300 ° C., for example, melting point of expanded graphite.

The flame-retardant foamed polystyrene foam according to the present invention is injected with a large amount of expanded graphite and ocher, which is harmless to the human body, and a large amount of the adhesive liquid component which is harmless to the human body. Excellent antibacterial and flame retardant, there is an effect such as humidity control and deodorization.

The present invention is excellent in mold resistance and moisture permeability due to the action of loess, not only does not cause mold, but also has excellent deodorizing effect and can be used as a good material for various construction materials. Also, it is harmless to human body because of its excellent mold resistance, moisture permeability and deodorant effect, and it can be used for various building materials such as flooring, ceiling, interior and exterior materials.

As a result of the combustion experiment by horizontally heating the flame at about 1,000 ° C. with the foamed polystyrene foam which was highly flame-retardant according to Examples 1 and 2 of the present invention by using gasstorch, the conventional foamed polystyrene foam, which was flame-retarded, was heated for several seconds. In the present invention, the expanded polystyrene foam of the present invention, which is melted within the mold and is not flame-retarded with expanded graphite and / or ocher adhesive, hardly ignites or collapses even when directly exposed to a gas flame of about 1,000 ° C. for 10 minutes. It is not semi-combustible and thus prevents rapid fire expansion.

FIG. 1 is a photograph of a flame retardant treatment with 7% expanded graphite mixed with a flame-retardant polystyrene foam, followed by direct exposure of 1,000 ° C. torch gas flame for 10 minutes. Self-extinguishing capacity prevents the propagation of embers and no longer burns.

FIG. 2 is a photograph after directly exposing a flame at 1,000 ° C. for 10 minutes to a top foam polystyrene foam dried after flame retardant treatment with an ocher adhesive solution, and the skeleton is slightly disturbed by the flame, but expanded graphite and // Or the flame-retardant polystyrene foam was dried after flame-retardant treatment with ocher adhesive solution, it can be seen that the flame is not burned anymore because the skeleton is alive even in strong thermal power is blocked.

Figure 3 is a photograph after direct exposure of the expanded polystyrene foam flame-retardant treated with expanded graphite and ocher adhesive to a gasstorch flame of 1,000 ℃ 10 minutes, the ignition of the ignition by the expanded graphite is no longer burned. Can be seen.

4 and 5 is a configuration of the expanded graphite and / or ocher adhesive injection device 1 shown as an example of the present invention, Figure 4 is expanded polystyrene foam (2) expanded graphite and / or ocher adhesive (3) 5 is a state before injecting, and FIG. 5 illustrates a state in which expanded graphite and / or ocher adhesive liquid 3 is injected into the expanded polystyrene foam 2.

The expanded graphite and / or ocher adhesive injection device (1) is a front and rear pair of horizontal members (5) which are installed parallel to the upper support member 4 and the foamed polystyrene foam (2) can be transported A plurality of rollers 6 installed at predetermined intervals between the pair of horizontal members 5, an endless type conveyor 7 provided over the entire rollers 6, and the plurality of rollers. Chain gears (not shown) connected to the rotating shaft of the roller (6) and power transmission means (not shown) for connecting the chain gears to the endless chain so that 6 can be interlocked, and one edge The power transmission stage 8 for connecting the chain gear coupled to the rotary shaft thereof and the chain gear coupled to the rotary shaft of the reduction motor 9 so that the roller 6a positioned at The conveyor may be installed on both sides to adjust the position of the roller 6b located at the other edge. Tension adjusting means 10 for adjusting the tension of the fish (7), a storage tank (11) installed under the conveyor (7) and containing a predetermined amount of expanded graphite and / or ocher adhesive liquid (3), and expanded graphite And / or liquid level sensors 12 (13) and (14) for detecting the upper and lower limits of the ocher adhesive liquid (3), and installed in the reservoir (11) to warm the expanded graphite and / or ocher adhesive liquid (3). A plurality of electrothermal heaters 15 maintained at a constant temperature between 30 ° C. and 80 ° C., a temperature sensor 16 for sensing a temperature of the expanded graphite and / or ocher adhesive liquid 3, and an upper part of the conveyor 7, And an injection chamber (17) configured to inject expanded graphite and / or ocher adhesive liquid (3) into the expanded polystyrene foam (2) with the side and the side blocked and open to the lower edge of the injection chamber (17). Sealing member 18, such as a silicone tube, which is in close contact with the upper surface of the expanded polystyrene foam 2 when the expanded graphite and / or ocher adhesive liquid 3 is injected, and the injection chamber 17 One or a plurality of cylinders (19) for raising and lowering, an injection tube (20) installed on the upper surface or side of the injection chamber (17), a pressure connected to the middle of the injection tube (20) and provided with a check valve Flexible valve 23 such as a corrugated pipe or hose in a flexible state connected between the control valve 21, the outlet (pressure port) of the high pressure pump 22, and the pressure control valve 21, and foreign matter or particles : A filter 24 connected between the inlet (suction port) of the high pressure pump 22 and the storage tank 11 so as to filter small pieces) and the like, and installed at the rear end vertical member 25 of the horizontal member 5. It consists of a cylinder 26, a stopper 27 and a controller 28 for stopping the expanded polystyrene foam 2, which is connected to the rod lower end of the cylinder 26 and transported.

The horizontal member 5 is longer than the length of the foamed polystyrene foam (2) to accommodate the foamed polystyrene foam (2), the separation distance is also far from the width of the foamed polystyrene foam (2).

The plane of the injection chamber 17 is slightly smaller than the plane of the expanded polystyrene foam 2, and a pressure gauge 29 for detecting the injection pressure is installed at the upper portion of the injection chamber 17 and connected to the injection chamber 17. The injection tube 20 is connected to a plurality of places through the distribution tube is a rapid injection of the expanded graphite and / or ocher adhesive liquid (3).

Inclined surfaces 11a are formed at both sides of the reservoir 11 so that expanded graphite and / or ocher adhesive liquid falling from the upper injection chamber 17 or the expanded polystyrene foam 2 is collected into the reservoir 11. Lose. A discharge tube 31 having a valve 30 is connected to the bottom center of the reservoir 11 to facilitate cleaning of the reservoir 11.

The cylinders 19 and 26 are installed on the support member 32 fixed to the upper portion of the horizontal member 5, and rod ends positioned at the lower portions of the cylinders 19 and 26 are provided at a plurality of positions of the injection chamber 17. The lifting and lowering of the injection chamber 17 is achieved by being fixed to the support member 33 fixed to the support member 33.

The cylinders 19 and 26 are air cylinders or hydraulic cylinders, and may be changed to a motor and a power transmission means depending on the situation.

The conveyor 7 supports the expanded polystyrene foam 2 as a whole while the expanded graphite and / or ocher adhesive liquid 3 flowing through or flowing through the expanded polystyrene foam 2 may sufficiently fall into the storage tank 11. It is a porous structure or a mesh-type or chain-shaped structure, and sufficient supporting force is required to the extent that the expanded polystyrene foam 2 is not damaged or damaged even if the injection chamber 17 is pressurized.

6 is a circuit block diagram of the controller 28 shown as an example of the present invention.

On / off of the high pressure pump 22, pumping pressure, and on of the heat transfer heater 15 are inputted to the input of the control unit C, which is composed of a central processing unit (CPU) or PLC (PLC). ) / Off, driving of display unit D and alarm unit A, on / off of cylinders 19 and 26, and on / off of reduction motor 9 a setting unit S (off) to control the speed to set the operating speed operation time of the conveyor 7 and the like, and to reset the controller when the controller abnormality occurs; A temperature sensor 16 for sensing the temperature of the expanded graphite and / or ocher adhesive 3 and a liquid level sensor 12, 13 for detecting the upper and lower liquid levels of the expanded graphite and / or the ocher adhesive 3 14 are respectively connected.

A display unit D for displaying data such as a set value (control value) or a current value, an operation state, etc. on the output of the control unit C; A plurality of electrothermal heaters 15 for heating the expanded graphite and / or the ocher adhesive liquid 3 and maintaining the temperature at a temperature of 30 ° C. to 80 ° C .; A reduction motor 9 for driving the conveyor 7; A high pressure pump 22; Cylinders 19 and 26; Alarm unit AL for alarming sound or light or sound and light in case of various abnormalities or malfunction or breakdown of sensor or liquid level is connected.

The high pressure pump 22 is provided with a pump motor, the cylinders 19, 26 are provided with a solenoid valve for the change of direction, the control unit (C) is connected to these pump motor and the solenoid valve.

The display unit (D) includes a power indicator for indicating a power supply state, a reduction motor (9), a high pressure pump (22), cylinders (19), a heat sensor (15), a temperature sensor (16), and a liquid level. It includes an operation indicator indicating that the sensors 12, 13, 14, etc. are in operation, an alarm indicating various abnormal conditions, and various data displays, and one or more of liquid crystal display (LCD), seven segment, or light emitting diode. Of course, according to the situation can be configured by the display unit with a touch screen to facilitate the use.

Meanwhile, the process of injecting expanded graphite and / or ocher adhesive liquid 3 into the expanded polystyrene foam 2 will be described below.

When the stopper 27 is lowered to the upper part of the horizontal member 5 by operating the cylinder 26, the foamed polystyrene foam 2 is transferred to the upper surface of the distal end of the conveyor 7 and seated therein. When a plurality of rollers 6 are rotated in a clockwise direction and the conveyor 7 moves in the direction of the stopper 27, the expanded polystyrene foam 2 on the conveyor 7 is moved in the arrow direction A. The front end of the expanded polystyrene foam 2 is stopped by the stopper 27, and the reduction motor 9 is stopped by the controller 28.

The injection chamber 17 is lowered by the operation of the cylinder 19 while the expanded polystyrene foam 2 is stopped at the injection position so that the sealing member 18 is tightly sealed to the upper surface of the expanded polystyrene foam 2. .

When the sealing is achieved simultaneously with the lowering of the injection chamber 17, the high pressure pump 22 is operated to expand the expanded graphite and / or the ocher adhesive liquid 3 of the reservoir 11 to the expansion pipe 23 and the injection pipe 20. Evenly supplied to the large injection chamber 17 through the plane, the injection chamber 17 is different depending on the thickness, density and size of the foamed polystyrene foam (2), but the pressure of approximately 0.5 ~ 6kg / ㎠ It flows down through the expanded polystyrene foam (2) and falls to the reservoir (11).

In addition, the planar area of the injection chamber 17 is slightly smaller than the planar area of the expanded polystyrene foam 2, and a part of the expanded graphite and / or ocher adhesive liquid 3 supplied to the sealing member 18 is expanded polystyrene foam. After passing through (2), it flows down to the side, so that the whole including the side of the expanded polystyrene foam (2) is flame-retardant.

The filter 24 located at the front of the high pressure pump 22 is transported to the injection chamber 17 at a high pressure after foreign matter or particles generated from the expanded polystyrene foam 2 are filtered.

Injection pressure of the expanded graphite and / or ocher adhesive liquid (3) is 0.5 ~ 6㎏ / ㎠ but different depending on the thickness and density and size of the expanded polystyrene foam (2), the injection time is expanded depending on the injection pressure It is in the range of several seconds to several tens of seconds so that graphite and / or ocher adhesive liquid 3 can be sufficiently injected into the expanded polystyrene foam 2.

In the present invention, the expanded graphite and / or ocher adhesive liquid 3 is reused while being continuously circulated and filtered, and the expanded graphite and / or ocher adhesive liquid 3 is consumed by reuse or evaporation so that the lower liquid level sensor 14 is When the lowered liquid level is detected, the expanded graphite and / or ocher adhesive injection device 1 is stopped while being alerted by the alarm AL, and the expanded graphite and / or ocher adhesive solution 3 is supplied so that the liquid level is at an intermediate position. When it rises up to (13), the expanded graphite and / or ocher adhesive liquid injector 1 operates or becomes operable, and the expanded graphite and / or ocher adhesive liquid 3 is excessively supplied to the upper liquid level sensor. When the detection of the 12 is similarly alarmed by the alarm AL, the expanded graphite and / or ocher adhesive injection device 1 is stopped, and when the liquid level is lowered and the sensing of the liquid level sensor 12 is released, the expanded graphite and / Or ocher adhesive injection device (1) I will be able to operate.

The degree of pressurization of the sealing member 18 in contact with the upper surface of the foamed polystyrene foam (2) is expanded graphite and / or ocher adhesive liquid which is forcibly injected by pressure without damaging the contact surface of the foamed polystyrene foam (2). It is satisfied if the sealing force of 3) does not leak.

On the other hand, when the injection of the expanded graphite and / or ocher adhesive liquid 3 is completed, the high pressure pump 22 is stopped to stop the supply of the expanded graphite and / or ocher adhesive liquid 3, the cylinder 19 is operated The injection chamber 17 is raised and stopped to stop, and the cylinder 26 is operated so that the stopper 27 is raised and the foamed polystyrene foam 2 is discharged to the rear end of the stopper 27, and the discharged polystyrene foam ( 2) is put into the dryer and dried for a predetermined time at a predetermined temperature, the stopper 27 is lowered by the cylinder 26, and in the direction of the arrow (A) of the expanded graphite and / or ocher adhesive injection device (1) New foamed polystyrene foam is added and the next flame retardant operation is resumed.

When the injection chamber 17 is raised in the above, the expansion tube 23 is stretched.

The cylinders 19 and 26 may be air cylinders or hydraulic cylinders or reduction motors and power transmission means.

The controller 28 determines and controls the injection pressure of the injection chamber 17 and the injection pressure, injection time, injection amount of the expanded graphite and / or ocher adhesive liquid 3, and the injection using the pressure control valve 21. The pressure can be adjusted precisely or again.

The conveyor 7 of the present invention is preferably a mesh type conveyor or a steel conveyor such that the expanded graphite and / or ocher adhesive liquid 3 can be well injected into the expanded polystyrene foam 2.

The foamed polystyrene foam 2, which is transferred to the flame retardant treatment position, is punched by a needle punching machine, and a plurality of fine holes are perforated at close intervals, so that the expanded graphite and / or ocher adhesive liquid 3 is more uniform. Penetrate evenly.

In the present invention, by maintaining the temperature of the expanded graphite and / or ocher adhesive solution 3 in the range of 30 ℃ ~ 80 ℃ constant surface tension is reduced by activating the interface between the surface of the foamed polystyrene foam (2) and expanded graphite to expand the expanded graphite And / or easier to inject and infiltrate the ocher adhesive solution (3), and to improve the strength of the expanded polystyrene foam (2) by expanded graphite, ocher and flame retardants which are uniformly and deeply infiltrated, and solidified after infusion or inhalation. do.

In the present invention, by installing an ultrasonic vibrator in the injection chamber 17 to which the expanded graphite and / or ocher adhesive liquid 3 is supplied, the injection and suction of the expanded graphite and / or the ocher adhesive liquid 3 can be more facilitated.

The ultrasonic waves refer to vibrations of 20,000 Hz or more outside the actual audible frequency in the range of 20 kHz to 20,000 kHz. When ultrasonic waves are irradiated into the water, an innumerable cavitation occurs and disappears. When the vibration of the bubble is generated, the micro-current is generated, causing the mass agitation, and when the resonance is extinguished, the energy is expanded to hundreds of thousands to millions of times, and the pressure and temperature of the bubble rise, resulting in micro thermal action and dispersion. This action promotes the physical and chemical reactions in the medium.

In the present invention, such a phenomenon is repeated about 20,000 to 2,000,000 (20 Hz to 2 MHz) times per second, and the expanded graphite and / or ocher adhesive liquid is formed by a plurality of ultrasonic vibrators installed in the injection chamber 17 (not shown). While 3) is resonating, the highly inflammable foamed polystyrene foam 2 is obtained by infiltrating evenly between the foamed particles of the foamed polystyrene foam 2 and the foamed particles and between the pores formed in the foamed particles.

In particular, since the medium (adhesive liquid) is a liquid, there is little energy reduction, and the expanded graphite and / or ocher adhesive liquid (3) is dispersed between the expanded particles and the expanded particles of the expanded polystyrene foam (2) and the expanded particles by the dispersion action by ultrasonic vibration. Evenly penetrates into the space formed on the inside, and expanded graphite and / or ocher adhesive liquid 3 more easily penetrates into the inside of the expanded polystyrene foam 2 through the fine holes formed by the needle punching machine, thereby further improving the flame retardant treatment efficiency. .

In the present invention, ocher not only suppresses the generation of soot, but also generates a large amount of far-infrared rays, which acts beneficially to the surroundings and the human body.

In addition, when the flame retardant treatment only with ocher, the rate of self-extinguishing falls, but self-extinguishing is achieved because the carbon dioxide (CO ₂ ) film is formed by the rapid and rapid expansion of the expanded graphite, thereby blocking the inflow of external oxygen (O ₂ ).

In addition, the expanded graphite is a gas containing chemicals by the heat of combustion, as a result of the rapid expansion of flaky graphite to form a stable layer (CO ₂ barrier) in the heat and chemicals to produce a flame-retardant effect in a solid phase method The larger the particles, the larger the expansion volume and the expansion start temperature depending on the chemicals used.

As described above, the present invention can be variously substituted, modified, and changed without departing from the technical spirit of the present invention by those skilled in the art. It is not limited to the accompanying drawings.

1 is a flame exposure picture of the expanded polystyrene foam flame-retardant treated with 7% expanded graphite adhesive liquid in the present invention a photograph of a state in which the propagation of embers is blocked by the self-extinguishing capacity of the expanded graphite.

Figure 2 is a flame exposure comparison picture of the expanded polystyrene foam flame-retardant treated with ocher adhesive and expanded graphite and / or ocher adhesive in the present invention.

Figure 3 is a flame exposure picture of the expanded polystyrene foam flame-retardant treated with expanded graphite and ocher adhesive in the present invention a photograph of a state in which the propagation of embers is blocked by the self-extinguishing capacity of the expanded graphite.

4 is a block diagram of the expanded graphite and / or ocher adhesive injection device shown as an example of the present invention.

Figure 5 is a state of use of the expanded graphite and / or ocher adhesive injection device shown as an example of the present invention.

6 is a circuit block diagram of a controller shown as an example of the present invention.

<Explanation of symbols for the main parts of the drawings>

(1)-Expansion graphite and / or ocher adhesive injection device (2)-Polyfoamstyrene foam

(3)-expanded graphite and / or ocher adhesive (4)-support members

(5)-horizontal member (6) (6a) (6b)-roller

(7)-Conveyor (8) (10)-Power Transmission

(9)-Reduction Motor (11)-Storage

(11a)-Slope (12) (13) (14)-Level Sensor

(15)-Electric Heater (16)-Temperature Sensor

(17)-injection chamber (18)-sealing element

(19) (26)-cylinder (20)-injection tube

(21)-Pressure regulating valve (22)-High pressure pump

(23)-Elastic Pipe (24)-Filter

(25)-vertical member (27)-stopper

(28)-controller (29)-pressure gauge

(30)-valve (31)-exit tube

(32) (33)-support member (AL)-alarm

(C)-control part (D)-display part

(S)-Settings

Claims (13)

In the flame-retardant treatment method of expanded polystyrene foam; Forming fine pores (0.5 mm to 2 mm in size) of dense spacing (3 mm to 15 mm intervals) in the molded foam polystyrene foam to a predetermined depth, and then placing them on a workbench; Bonding the expanded graphite adhesive liquid injection chamber to one side of the expanded polystyrene foam to be sealed; Supplying the expanded graphite adhesive liquid maintained at a constant temperature at a temperature of 30 ° C. to 80 ° C. to the injection chamber at a high pressure and injecting into the expanded polystyrene foam; Stopping supplying the expanded graphite adhesive liquid supplied to the injection chamber; Separating the injection chamber from the expanded polystyrene foam; Separating the expanded polystyrene foam from which the expanded graphite adhesive liquid is injected and the injection chamber is separated from a work table; Adjusting the foamed restyrene foam separated from the work table at a predetermined temperature for a predetermined time; Flame retardant treatment method of expanded polystyrene foam using expanded graphite adhesive liquid. In the flame-retardant treatment method of expanded polystyrene foam; Forming fine pores (0.5 mm to 2 mm in size) of dense spacing (3 mm to 15 mm intervals) in the molded foam polystyrene foam to a predetermined depth, and then placing them on a workbench; Bonding the expanded graphite and ocher adhesive injection chamber to one side of the expanded polystyrene foam to be sealed; Supplying expanded graphite and ocher adhesive liquid maintained at a constant temperature at a temperature of 30 ° C. to 80 ° C. to the injection chamber at a high pressure, and then injected into the expanded polystyrene foam; Stopping supplying expanded graphite and ocher adhesive liquid supplied to the injection chamber; Separating the injection chamber from the expanded polystyrene foam; Separating the expanded polystyrene foam from which the expanded graphite and ocher adhesive solution is injected and the injection chamber is separated from a work table; Adjusting the foamed restyrene foam separated from the work table at a predetermined temperature for a predetermined time; Flame retardant treatment method of expanded polystyrene foam using expanded graphite and ocher adhesive solution. In the flame-retardant treatment method of expanded polystyrene foam; Preparing by forming a fine space (0.5 mm ~ 2 mm size) of dense spacing (3 mm ~ 15 mm interval) in the molded foam polystyrene foam to a predetermined depth; Impregnating the expanded graphite adhesive liquid by immersing the expanded polystyrene foam in the expanded graphite adhesive liquid at a constant temperature of 30 ° C. to 80 ° C. for a predetermined time; Bonding a vacuum chamber to the opposite surface of the expanded polystyrene foam impregnated with the expanded graphite adhesive liquid; Vacuuming the vacuum chamber with a vacuum pump; Expanding the expanded graphite adhesive liquid into the expanded polystyrene foam by the vacuum of the vacuum chamber; Stopping suction of the expanded graphite adhesive liquid; Separating the vacuum chamber from the expanded polystyrene foam; Separating the expanded polystyrene foam from which the expanded graphite adhesive liquid is sucked and the vacuum chamber is separated from a work table; Drying the expanded polystyrene foam separated from a work table at a predetermined temperature for a predetermined time; Flame retardant treatment method of expanded polystyrene foam using expanded graphite adhesive liquid. In the flame-retardant treatment method of expanded polystyrene foam; Preparing by forming a fine space (0.5 mm ~ 2 mm size) of dense spacing (3 mm ~ 15 mm interval) in the molded foam polystyrene foam to a predetermined depth; Impregnating the expanded graphite and ocher adhesive liquid by immersing the expanded polystyrene foam in the expanded graphite and ocher adhesive solution maintained at a temperature of 30 ° C. to 80 ° C. for a predetermined time; Bonding a vacuum chamber to the opposite surface of the expanded polystyrene foam impregnated with the expanded graphite and the ocher adhesive; Vacuuming the vacuum chamber with a vacuum pump; Expanding the graphite and ocher adhesive liquid into the expanded polystyrene foam by the vacuum of the vacuum chamber; Stopping inhalation of the expanded graphite and ocher adhesive; Separating the vacuum chamber from the expanded polystyrene foam; Separating the expanded polystyrene foam from which the expanded graphite and ocher adhesive is sucked and the vacuum chamber is separated from a work table; Drying the expanded polystyrene foam separated from a work table at a predetermined temperature for a predetermined time; Flame retardant treatment method of expanded polystyrene foam using expanded graphite and ocher adhesive solution. The method according to any one of claims 1 to 4; The expanded graphite adhesive liquid is a high flame retardant treatment method of expanded polystyrene foam using the expanded graphite adhesive liquid obtained by uniformly mixing 3% to 30% of expanded graphite in particulate form with 97% to 70% of adhesive liquid, respectively. The method according to claim 2 or 4; Expanded graphite and ocher adhesives are obtained by mixing evenly between 96% to 50% of the adhesive solution and 3% to 20% of fine particles of clay and 3% to 30% of particulate graphite. High flame retardant treatment method of foamed polystyrene foam using a liquid. The method according to any one of claims 1 to 4; The adhesive solution is acrylic resin, α-Olefin resin, urethane resin, ether cellulose, ethylene-vinyl acetate emulsion, Epoxy resin, Polyvinyl acetate emulsion, Polyvinyl Chloride (PVC), Silicone adhesives, Water based polymer-isocyanate, Styrene-butadiene Styrene-butadiene rubber latex, Phenolic resin, Polyimide, Polyvinyl acetate solvent type (PVAc), Polystyrene resin (Polystyrene type, PS), Polyvinyl Alcohol type (Polyvinylalcohol, PVAl), polyvinylpyrrolidone (PVP), polyvinyl butyral resin (Polyvinylbutyral, PVB), melamine resin (Uelamine resin, Urea resin, U) F), Resorcinol resin, water-based, melamine resin, isocyanate-based, polystyrene resin solvent, any one or at least any one of inorganic binders, using expanded graphite and ocher adhesive liquid High flame retardant treatment of expanded polystyrene foam. The method according to any one of claims 1 to 4; PVA (Polyvinylalcohol), EVA (Ethylenevinylalcohol), Ether-based cellulose (Ethercellulose), Ethylene-vinylacetate copolymer emulsion, Phenolic resin, Polyvinyl acetate solution system (Polyvinyl acetate of expanded polystyrene foam using expanded graphite and loess adhesive liquid, characterized in that any one or at least one of solvent type (PVAc), polystyrene resin (Polystyrene type, PS), polyvinyl butyral resin (Polyvinylbutyral, PVB) High flame retardant treatment method. The method according to claim 1 or 3; Expanded graphite is a high flame retardant treatment method of expanded polystyrene foam using expanded graphite and ocher adhesive, characterized in that 60mesh ~ 150mesh. The method according to claim 2 or 4; Ocher is 200mesh ~ 1,000mesh, expanded graphite is a high flame retardant treatment method of expanded polystyrene foam using expanded graphite and ocher adhesive, characterized in that 60mesh ~ 150mesh. The method according to claim 1 or 2; High flame retardant treatment method of expanded polystyrene foam using expanded graphite and ocher adhesive, characterized in that the injection pressure is 0.5 ~ 6㎏ / ㎠. The method according to claim 3 or 4; High flame retardant treatment method of expanded polystyrene foam using expanded graphite and ocher adhesive, characterized in that the suction power is 10 ~ 1torr. A high flame retardant polystyrene foam produced by the high flame retardant treatment method according to any one of claims 1 to 4.

Images