KR20200070963A - Manufacturing method of environment-friendly polyurethane heat insulating material using waste - Google Patents

Abstract

According to the present invention, disclosed is a method of manufacturing an eco-friendly polyurethane heat insulation material by recycling waste. The method comprises: a water-forming composition forming step (S110) of mixing polyol, a water-forming agent, and an additive in a stirrer (210) so as to prepare a liquid or a gel type water-forming composition (40); a waste processing step (S120) of pulverizing at least one waste among Styrofoam (EPS, 10), waste PET (20), waste vinyl (30), or waste cans (70), forming the at least one waste into a sheet, or processing the at least one waste by injecting the water-foaming composition (40) thereinto; and a water-foaming synthesis step of putting the water-foaming composition (40) and the processed waste into a foaming mold (230) in which a foaming/molding space is formed and causing the composition (40) and the waste to be synthesized to each other and cured so as to form a polyurethane heat insulation material (50).

Description

MANUFACTURING METHOD OF ENVIRONMENT-FRIENDLY POLYURETHANE HEAT INSULATING MATERIAL USING WASTE}

The present invention relates to a method for manufacturing an environmentally friendly polyurethane insulating material in which waste is recycled, and more specifically, it is environmentally friendly by foaming in a water-foaming method so that recycled waste and polyols such as waste styrofoam, waste PET, waste vinyl and waste cans are synthesized. The present invention relates to a method for manufacturing an eco-friendly polyurethane insulation material in which recycled waste can be produced, which can reduce the manufacturing cost of the insulation material, does not require a license to handle dangerous goods, and can significantly increase the heat insulation rate and flame retardancy.

Conventionally, hydrogen fluorocarbon (HCFC-141b) was mainly used as a foaming agent for foaming polyurethane. However, the hydrogen fluoride fluoride is a kind of freon, and since it generates environmental pollution, production is gradually decreasing due to various regulations. The cost of the foaming agent rises due to insufficient supply, and the manufacturing cost of the foamed polyurethane foam insulation material is significantly increased. There was a rising issue.

In addition, although cyclopentane is used as a foaming agent to replace the hydrogen fluoride, the cyclopentane is a highly flammable material and is a combustible material corresponding to Class 3 of dangerous goods. In order to do so, the cost of explosion-proof equipment (500 million won per 200 pyeong) and the possibility of licensing according to the land use plan must all be evaluated, and there is a problem that the fire risk of the insulation product is amplified due to the use of flammable materials. .

On the other hand, China, which recently imported more than half of the world's waste, has designated 24 recycling wastes as plastics, vinyl, textiles, and metals for import due to environmental pollution, and secondary recycling collectors in Seoul and other metropolitan areas have recycled waste. Refusal of the collection caused a disturbance of garbage. That is, recycled waste is overflowing because there is no place to throw away. Therefore, projects that can maintain economic value as raw materials for recycled products must be actively carried out, and active support from the government's recycling field projects and mid- to long-term strategic measures are needed.

Published Patent Publication No. 10-2018-0041916 (2018. 04. 25), composite insulation material and a method for manufacturing the same.

The present invention was created to solve the above-mentioned problems, and the object of the present invention is to foam and mold a polyurethane insulating material in a water-foaming method using water as a foaming agent to prevent environmental pollution and fire hazards caused by conventional gas-type foaming agents. It does not require a license to handle dangerous goods and can significantly reduce the manufacturing cost of insulation materials.It synthesizes recycled wastes such as waste styrofoam, waste PET, waste vinyl, and waste cans with polyol to foam and insulate the insulation to increase the thermal insulation rate to increase thermal insulation performance. It is to provide a method for manufacturing an environmentally friendly polyurethane insulating material with recycled waste that can significantly improve flame retardancy and improve flame retardancy.

In order to achieve the above object, a method for manufacturing an eco-friendly polyurethane insulating material in which wastes are recycled according to the present invention is mixed with a polyol, a water-foaming agent, and an additive in a stirrer 210 to form a liquid or gel-like water-foaming composition 40. The water-foaming composition forming step (S110); Waste styrofoam (EPS, 10), waste PET (20), waste vinyl (30), or waste cans of any one or more of the waste cans (70) are crushed or molded into a sheet form, or foam-injected into the water-foaming composition (40). Waste processing step of processing (S120); And the foaming molding space is formed in the foaming mold 230, the water-foaming composition 40 and the processed wastes are introduced into each other and then synthesized and cured to form a polyurethane insulating material 50 to form a water-foaming step (S130); It includes.

Here, the waste is waste styrofoam 10, and in the waste processing step (S120), the waste styrofoam (10) is crushed and processed into a form of foam (11), and the water-foam synthesis step (S130) is processed. After mixing the foam granules 11 and the water-foaming composition 40, the foam granules 11 are dispersed and disposed in the foamed water-foaming composition 40 by injecting it with a curing agent inside the foam mold 230 with a foamer. Can be synthesized in a mutual form.

In addition, in the waste processing step (S120), the crushed foam granules 11 are mixed with a phenolic resin-containing flame retardant coating agent to coat the flame retardant coating agent on the surface of the foam granules 11 and to dry the coated flame retardant coating agent. In the water foam synthesis step (S130), the flame retardant coating agent may be mixed with the dried foam granules 11 and the water foam composition 40.

In addition, in the waste processing step (S120), water is diluted in a phenolic resin, and a flame retardant coating agent having a viscosity of 20° C. / 50 to 100 cps (centipoise) is mixed with the foam granules 11, but the foam granules 11 and flame retardant are mixed. A flame retardant coating agent may be coated on the surface of the foam granules 11 by mixing the coating agent and the curing agent in a ratio of 10:7 to 15:0.7 to 1.5.

In addition, in the waste processing step (S120), after drying the flame-retardant coating agent coated on the surface, the foam granules 11 may be cooled to a temperature of 10° C. to 25° C. so that the particles of the foam grains 11 contract.

In addition, the waste is a waste PET (20), and in the waste processing step (S120), the waste PET (20) is heated and melted, then compressed and processed into a PET sheet (21), and the water-foaming synthesis step (S130). In ), the process of placing the PET sheet 21 on top of the formed water-foaming composition layer by forming the water-foaming composition layer by injecting the water-foaming composition 40 with a curing agent inside the foaming mold 230 with a foaming machine. The water-repellent composition 40 and the PET sheet 21 may be mutually synthesized in a form in which a plurality of water-repellent composition layers and a plurality of PET sheets 21 are alternately stacked.

In addition, the waste is waste vinyl 30, and in the waste processing step (S120), each waste vinyl 30 is attached to each other in the form of a sheet, or heated and melted, and then compressed in a sheet form to a waste vinyl sheet 31. In the step of synthesizing the water-foaming step (S130), the water-foaming composition 40 is injected into the foaming mold 230 with a curing agent to form a water-foaming composition layer, and the upper part of the water-foaming composition layer is formed. The process of arranging the waste vinyl sheet 31 is repeated to synthesize the water-foaming composition 40 and the waste vinyl 30 in a form in which a plurality of the water-foaming composition layers and the plurality of waste-vinyl sheets 31 are alternately stacked. Can be.

In addition, the waste is a waste can 70, and in the waste processing step (S120), the water-repellent composition 40 is injected into the waste can 40 by injecting the water-foaming composition 40 with a curing agent into the waste can 40. ) Is processed to be foamed, and in the water-foaming synthesis step (S130), a plurality of closed cans 40 in which the water-foaming composition 40 is foamed are disposed at regular intervals inside the foam mold 230, and the foaming is performed. The water-foaming composition 40 and the waste can 40 in a form in which each waste can 40 is dispersed in the foamed water-foaming composition 40 by injecting the water-foaming composition 40 with a curing agent inside the mold 230 ).

In addition, in the waste processing step (S120), when the foamed foam composition 40 foamed inside the waste can 40 is cured, the foamed foam composition 40 foamed in the water foam synthesis step (S130) and the waste can 40 ) It is possible to form a plurality of through-holes on the surface of the closed can 40 so that the foamed water-foaming composition 40 is adhered to each other.

In addition, in the step of forming the water-foaming composition (S110), the first polyol of Mw (Molecular weight) 400 is reduced so that the brittleness and shrinkage of the water-foaming composition 40 cured through the water-foaming synthesis step (S130) are reduced. , A polyol mixture having a second polyol of Mw 500 and a third polyol of Mw 1,000 so as to have an OH-Value of 300 to 500 or less may be mixed in the agitator 210 together with the water blowing agent and additives.

According to the method of manufacturing an eco-friendly polyurethane insulation material recycled waste according to the present invention, the water-foaming composition forming step (S110) of forming the water-foaming composition 40, which is a foaming material necessary for molding the polyurethane heat-insulating material 50, is performed. By replacing the gas-type foaming agent such as hydrogen fluoride or cyclopentane to form the water-foaming composition 40 using a water-foaming agent such as water, it prevents environmental pollution and fire risk caused by the gas-type foaming agent and handles dangerous goods Furnace licensing is not required and the cost of the foaming agent can be reduced, thereby significantly reducing the manufacturing cost of the insulation.

Also,

1 is a block diagram showing the sequence of a method for manufacturing an environmentally friendly polyurethane insulation material in which waste is recycled according to a preferred embodiment of the present invention;
Figure 2 is a schematic diagram showing the configuration of a stirrer according to a preferred embodiment of the present invention,
Figure 3 is a schematic diagram showing the configuration of the foam mold 230 according to a preferred embodiment of the present invention,
Figure 4 is a schematic diagram showing the process of manufacturing a polyurethane insulating material using a waste styrofoam according to a preferred embodiment of the present invention,
5 is a photograph of a state in which the waste styrofoam according to a preferred embodiment of the present invention is crushed and processed into a form of foam grains;
Figure 6 is a schematic diagram showing a process for producing a polyurethane insulation using a waste PET according to a preferred embodiment of the present invention,
7 is a schematic view showing a process for producing a polyurethane insulating material using waste vinyl according to a preferred embodiment of the present invention,
8 is a schematic view showing a process of manufacturing a polyurethane insulating material using a waste can according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be interpreted as being limited to ordinary or dictionary meanings, and the inventor appropriately explains the concept of terms in order to explain his or her invention in the best way. Based on the principle of being able to be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Therefore, the configuration shown in the embodiments and drawings described in this specification is only one of the most preferred embodiments of the present invention and does not represent all of the technical spirit of the present invention, and thus can replace them at the time of application. It should be understood that there may be equivalents and variations.

A method of manufacturing an eco-friendly polyurethane insulation material in which waste is recycled according to a preferred embodiment of the present invention is such that recycled waste and polyol such as waste styrofoam 10, waste PET 20, waste vinyl 30 and waste can 40 are synthesized. As a method of manufacturing a polyurethane insulating material 50 that is environmentally friendly and reduces the manufacturing cost of an insulating material by foaming with a water-foaming method, and does not require a license to handle dangerous goods, and significantly increases the heat blocking rate and flame retardancy, As shown in Figure 1 includes a water-foaming composition forming step (S110), a waste processing step (S120) and a water-foaming synthesis step (S130).

First, the step of forming the water-foaming composition (S110) is a step of forming the water-foaming composition 40, which is a main raw material for foaming the polyurethane heat insulating material 50, and agitator 210 for materials such as polyol, water-foaming agent and additives ) To form a liquid or gel-like water-foaming composition 40.

Here, as shown in Figure 2, the stirrer 210 is disposed in the stirring chamber 211 and the inner space of the stirring chamber 211 to provide an inner space for stirring each material therein while rotating An impeller 212 that agitates each of the materials introduced by forming a rotational flow, and a drive motor 213 that is axially connected to the impeller 212 and the stirring shaft 214 to provide a driving force required for the impeller 212 to rotate. , It is made of a plate shape upright on the inner wall of the stirring chamber 211 to resist the rotational flow of the impeller 212 to form a vortex 215, and heating the stirring chamber 211 to a set temperature It includes a heating unit 216.

In addition, in the step of forming the water-foaming composition (S110), the water-foaming agent injected into the stirrer 210 can be used as an eco-friendly material and inexpensive water to replace the existing hydrogen fluoride fluoride to prevent environmental pollution and prevent foaming. Cost reduction can significantly reduce the manufacturing cost of insulation materials, and can replace the existing cyclopentane, thereby preventing fire hazards and realizing unnecessary effects of permitting permission to handle dangerous goods.

In addition, a polyol having a single molecular weight may be used as the polyol input to the stirrer 210, but the first polyol of Mw (Molecular weight) 400 × 2, the second polyol of Mw 500 × 1 and the third of Mw 1,000 By using a total of four types of polyols, such as polyol × 1, to make OH-Value 300 to 500 or less, by forming polyols and OH Values of different molecular weights, the phenomenon of brittleness and shrinkage of the cured water-foaming composition 40 occurs. And improve the numerical stability. In addition, the polyol ratio for each molecular weight may be 30 to 50% for Mv 400, 10 to 30% for Mv 500, and 20 to 40% for Mv 600.

In addition, due to the nature of the polyurethane insulating material 50, shrinkage and dimensional strain increase when the temperature drops below zero. To this end, by including a silicone antifoaming agent in the additive, the structure of the close sell is stabilized, cell cell opening is prevented and independent. It is possible to realize a cell structure that is not sensitive to temperature changes by improving the heat insulation by increasing the bubble ratio.

In addition, two types of silicone antifoaming agents and two types of anti-settling agent amine catalysts may be made of a material capable of interacting with polyol properties to prepare the blowing and gel time reactivity in an optimal state. As the silicone antifoaming agent, silicone-based and non-silicone-based silicones may be used, and pentamethyl diethylene triamine (PMDETA) and dimethyl cyclohexyl amine (DMCHA) may be used as the amine catalyst.

In addition, the experiment was confirmed that the order of raw material input and the mixing conditions such as the impeller type, temperature and time are main when forming the water-foaming composition 40. The stirring RPM is 1,500 and the temperature is preferably 25°C to 30°C, and it was confirmed that the temperature when injecting the raw material also affects the finished product. If the temperature is 25°C or less or the temperature is not constant, the agitation efficiency and physical properties are not good, so the product quality may not be constant. Also, through the long-term research and development, it was possible to find the optimal input technology and mixing conditions.

And, as a component of the water-foaming composition 40, the first polyol 20 ~ 30% (average functional group 3 ~ 6, 500 ~ 600mgKOH / g, Glycerol Base), the second polyol 20 ~ 30% (average functional group 5 ~ 7 , 400~500mgKOH/g, Seed Oil/Glycerol Base), 10~20% of 3rd polyol (average functional group 2~5, 400~500mgKOH/g, Glycerol Base), 15~25% of 4th polyol (average functional group 3~ 6, 200~300mg/KOH/g, Triol Sucrose/Glycerol Base), flame retardant 5~10% (TCPP, Tris(1-Chloro-2-Propyl)Phosphate), 1st silicon 1~2% (silicone system), 1st 2 Silicon 0.5~1.5% (non-silicone), 1st catalyst 0.5~2% (Pentamethyl Diethylene Triamine (PMDETA), 2nd catalyst 0.5~2% (Dimethyl Cyclohexyl Amine (DMCHA), Blowing agent 3~10% (H ₂ O Water).

Here, the silicone used as the foaming agent is a water-soluble type, and is composed of a density of 45 to 50 kg/m 3 to minimize the phenomenon of breaking or shrinking of the cured water-foaming composition 40. When the density is out of the above range, shrinkage and dimensional deformation of the insulating material occur at sub-zero temperatures, that is, it is possible to prevent the dimensional deformation without any trouble during construction work by setting the appropriate density to the weight reduction of the product as in the above density range.

In addition, as a result of the experiment, the quality was different according to the input order by raw material, and the result in the order of polyol→flame retardant→silicone foaming agent→foaming agent→catalyst was the best. When stirring, the rotation RPM was 1,000 to 1,500, and when the catalyst was added, the reactivity and quality of the molded polyurethane insulation 50 were the same when lowering to 1,000 or less.

On the other hand, the waste processing step (S120) is a step of processing the waste into a form that can be synthesized with the water-foaming composition 40, waste styrofoam (EPS, 10), waste PET 20, waste vinyl 30 or waste cans. Grinding any one or more of the waste (40) or processing in the form of a sheet, or by foam injection processing the water-foaming composition 40 therein.

The water-foaming synthetic step (S130) synthesizes the water-foaming composition (40) formed through the water-foaming composition forming step (S110) and the waste processed through the waste processing step (S120) to form a foam with a polyurethane insulating material (50). As a step to do, the foaming mold space is formed, and the water-foaming composition 40 and the processed waste are put into each other to synthesize and cure to form a polyurethane insulating material 50.

Through the waste processing step (S120) and the water-foaming synthesis step (S130), waste waste is transferred to the material of the insulation material, thereby solving the problem of waste collection and recycling, and at the same time, improving the thermal insulation performance by increasing the thermal insulation rate of the insulation material. It is possible to reduce the production cost of the heat insulating material by reducing the amount of the water-foaming composition 40.

As shown in FIG. 3, the foaming mold 230 includes a foaming chamber 231 provided with a molding space, an upper cover 232 covering the opened upper portion of the foaming chamber 231 to be opened and closed, and the foaming chamber It may include a lateral cover 233 that covers the opened upper portion of the opening 231 to be opened and closed, it is easy to mold the polyurethane insulation 50 is completed through the upper cover 232 and lateral cover 233 It can be demolded. The foaming chamber 231 may be prevented from being attached to the surface of the water-foaming composition 40 injected by being coated with Teflon on the inner surface of the molding space.

Hereinafter, a detailed manufacturing method of the waste processing step (S120) and the water foam synthesis step (S130) according to the target of the waste will be described separately.

When the waste is waste styrofoam 10, as shown in FIG. 4, in the waste processing step (S120), the waste styrofoam 10 is crushed and processed into a form of foam granules (see FIG. 11 and FIG. 5). Here, as shown in the drawing, the hammer mill 220 may be used as a crushing means, and various other means used to crush styrofoam in the form of foam particles may be used in the technical field to which the present invention pertains. And the size of each foam grain 11 is preferably crushed to be 20 mm or less.

In addition, in the water-foaming synthesis step (S130), the processed foam granules 11 and the water-foaming composition 40 are mixed and then injected with a curing agent into the foaming mold 230 with a foamer to foam the water-foaming composition. It is possible to solve the collection problem of the waste styrofoam 10 and to prepare a lightweight polyurethane insulating material 50 by mutually synthesizing the foam grains 11 in a distributed arrangement.

Here, in the waste processing step (S120), the crushed foam granules 11 are mixed with a phenolic resin-containing flame retardant coating agent to coat the flame retardant coating agent on the surface of the foam granules 11 and to dry the coated flame retardant coating agent. In the water-foaming synthetic step (S130), the flame-retardant coating agent is foamed and molded with the polyurethane foam 50 by mixing the dried foam granules 11 and the water-foaming composition 40. As described above, the foam granules 11 are coated with a flame retardant coating agent to enhance the flame retardancy of the molded polyurethane insulating material 50 and prevent static electricity between the foam granules 11, and increase the weight of the foam granules 11 to foam water. It can be easily mixed with the composition 40. The foam granules 11 crushed in the hammer mill 220 can be easily transported through a screw transport pipe connected to a separate stirrer (mixer, not shown) for coating with a flame retardant coating agent, and the foam granules 11 coated with a flame retardant coating agent ) Can be easily transferred through a screw transfer pipe connected to a dryer (not shown) provided with a hot air blower to dry the flame retardant coating agent coated on the surface, and the dryer is dried at a drying temperature of 300°C to 400°C for 30 minutes to 60 minutes. The process takes place.

In addition, in coating the flame retardant coating agent in the waste processing step (S120), water is diluted in a phenolic resin, and the viscosity is 20°C / 50 to 100 cps (centipoise) and the flame retardant coating agent is mixed with the foam granules 11 to obtain a high viscosity ( The phenolic resin of approximately 10,000 cps) is prevented from being agglomerated and gelled before being coated on the surface of the foam granules 11 to realize coating efficiency, and the foam granules 11, a flame retardant coating agent and a curing agent are 10:7 to 15:0.7 The mixing time required for the flame retardant coating agent to be coated on the surface of the foam granules 11 by mixing at a ratio of 1.5 to 1.5 (preferably 10:10:1) to coat the flame retardant coating agent on the surface of the foam granules 11 ( It can be coated on the surface in a liquid state so as not to harden within about 1 hour).

In the waste processing step (S120), the flame-retardant coating agent is cooled by drying the flame-retardant coating agent coated on the surface to a temperature of 10° C. to 25° C. (preferably about 15° C. to 20° C.) using a cold air blower (not shown). By allowing the particles of the coated foam granules 11 to shrink, it is possible to prevent the foam granules 11 from shrinking after being molded into the polyurethane insulating material 50, thereby deteriorating the strength and thermal insulation of the insulating material.

The foam granules 11 cooled to the set temperature are transferred to a stirrer (mixer) and mixed with the water-foaming composition 40 at a ratio of 1:1 for 30 to 60 minutes.

In addition, in the water-foaming synthesis step (S130), foaming injection of the water-foaming composition 40 and the foam granules 11 evenly mixed through the above mixing process into the foaming mold 230, wherein the foaming mold 230 is 40 By heating to ℃ to 50 ℃ can be prevented from thermal deformation of the water-foaming composition 40 and the synthesized waste.

When foaming, the raw material and the curing agent in which the water-foaming composition 40 and the foam granules 11 are mixed are set at a ratio of 1: 1 and foamed into the foaming mold 230 using a foaming machine, and the density is adjusted according to the mold size. The raw material weight is set according to 45 kg/m 3 to 50 kg/m 3.

Subsequently, the foamed mold 230 is packed to undergo a primary aging process for about 5 minutes to 10 minutes, and after the molded foamed polyurethane insulation 50 is demolded from a mold, it is about 30°C to 40°C in a separate heat chamber (not shown). A second aging process is performed for heating at a heating temperature of ℃ for about 30 to 60 minutes. Through this aging process, the moisture contained in the polyurethane insulating material 50 is completely dried, so that the heat insulating performance of the heat insulating material can be prevented from being lowered by moisture, and it is possible to prevent the easily deformed manufactured heat insulating material.

On the other hand, when the waste is a waste PET 20, as shown in FIG. 6, in the waste processing step (S120), the waste PET 20 is heated and melted, then compressed and processed into a PET sheet 21. The PET sheet 21 is preferably processed to a thickness of 0.3mm to 1mm.

In the water-foaming synthesis step (S130), the water-foaming composition 40 is injected into the foamed mold 230 with a foaming agent together with a curing agent to form a water-foaming composition layer and the PET sheet on the formed water-foaming composition layer ( 21) by repeating the process of arranging a plurality of water-repellent composition layers and a plurality of PET sheets 21 alternately stacked to form a water-repellent composition 40 and PET sheet 21, thereby synthesizing waste PET 20 ) Can solve the problem of collection and can significantly improve the insulation, bending resistance and durability.

Here, the PET sheet (21) with a predetermined interval (for example, 10 cm to 30 cm) to form a through hole opened up and down, with the PET sheet (21) interposed therebetween, the foamed composition 40 is foamed and injected into the upper part The water-foaming composition 40 foamed in the lower portion can be attached up and down through the through hole to further strengthen the adhesion.

On the other hand, when the waste is waste vinyl 30, as shown in FIG. 7, in the waste processing step (S120), each waste vinyl 30 is attached to each other or heated and melted as in the waste vinyl sheet 31. After pressing it in a sheet form, it is processed into a waste vinyl sheet (31). In more detail, the collected waste vinyl 30 is classified according to the type after washing according to the state. After that, it is cut in units of 1 m to 3 m using a cutting machine, and then, using a hot wire adhesive facility, 3 to 5 layers of vinyl are stacked and heat is applied to bond each vinyl in a honeycomb shape to make one waste vinyl sheet (31). .

In the water-foaming synthesis step (S130), a water-foaming composition layer is formed by injecting the water-foaming composition 40 with a curing agent into the foaming mold 230 with a foamer as in the case of using the PET sheet 21. By repeating the process of disposing the waste vinyl sheet 31 on the top of the water-foaming composition layer, a plurality of water-foaming composition layers and a plurality of waste vinyl sheets 31 are alternately stacked to form a water-foaming composition 40 and lungs. By mutually synthesizing the vinyl sheet 31, the collection problem of the waste vinyl 30 can be solved and, as in the case of using the waste vinyl sheet 31, heat insulation, bending resistance, and durability can be improved.

Here, to form a through hole opened up and down at regular intervals (for example, 10 cm to 30 cm) on the waste vinyl sheet 31, the foamed foam composition 40 is foamed and injected over the waste vinyl sheet 31 therebetween. ) And the water-foaming composition 40 foamed in the lower portion can be attached up and down through the through hole to further strengthen the adhesion.

On the other hand, when the waste is a waste can 40, in the waste processing step (S120), as shown in FIG. 8, the water-foaming composition 40 is injected with a curing agent into the waste can 40 to close the waste can 40 ) The water-foaming composition 40 is processed to be foamed, and in the water-foaming synthesis step (S130), a plurality of waste cans 40 in which the water-foaming composition 40 is foamed is fixed inside the foaming mold 230. The water-foaming composition 40 is arranged in a form in which each waste can 40 is dispersedly disposed in the water-foaming composition 40 by disposing the water-foaming composition 40 with a curing agent inside the foam mold 230 and spaced apart at intervals. ) By synthesizing the waste cans 40 with each other, the collection problem of the waste cans 40 can be solved, the heat insulation and durability can be improved, and the production cost can be lowered by significantly reducing the amount of the water-foaming composition 40. In addition, the aluminum component of the waste can 40 can enhance the flame retardancy, and the waste can 40 can be used as it is without processing, so there is no need for a recycling preparation process that compresses and melts when recycling the waste can.

Here, the collected waste cans 70 are put into a heating room set at 50°C to 60°C to remove the evaporated water inside the waste cans 70 by using a foamer to remove the water. Foaming is performed by injecting the water-foaming composition 40 according to the inner size, and after foaming, it is placed in a heat chamber and heated at a heating temperature of about 40°C to 50°C for about 30 minutes to 60 minutes to mature.

In addition, in the waste processing step (S120), when the water-foaming composition 40 foamed inside the waste can 40 is cured, the water-foaming synthesis step (S130) by forming a plurality of through holes on the surface of the waste can 40 The adhesive force between the water-repellent composition 40 and the closed can 40 by allowing the water-foaming composition 40 to be foamed in the foam mold 230 and the water-foaming composition 40 foamed inside the closed can 40 to be adhered to each other. Can be greatly enhanced.

For example, the foam mold 230 is placed between 50 mm to 100 mm between each of the closed cans 70, and is fixed to the foam mold 230 in a 1 to 3 layer structure by aligning heat and heat. Subsequently, the foaming mold 230 is injected and foamed by using a foaming machine. Thereafter, the foamed mold 230 is packed to primary aging for about 5 minutes to 10 minutes, and the matured polyurethane insulation 50 is demolded from the mold and then heated at a heating temperature of about 30°C to 60°C for 30 minutes to 60 minutes. 2nd aging.

As described above, the quality of the heat insulating material can be improved by synthesizing each waste into foamed foam, that is, the water-foaming composition 40, and specifically, the air layers of the water-foaming composition 40 are recycled sheets 21 and 31. As the temporary layer is synthesized and thermally blocked, the thermal conductivity can be lowered. In addition, the problem of the dimensional stability (contraction phenomenon) of the water foam can also prevent deformation of the heat insulating material by minimizing shrinkage by keeping the layers 21 and 31 firmly in the layers.

In addition, the foamed foam mold 230 was designed to fit the product size, and experiments on the temperature of the foam mold 230 were conducted in various ways so as not to affect the waste, so that 40°C to 50°C was able to derive the most suitable results. In addition, the adhesiveness between waste and urethane was excellent, and there was no melting or empty space. Also, it is preferable to design the foam mold 230 to be coated with Teflon so that the insulation can be easily separated after the molding is completed, thereby increasing production efficiency.

As described above, although the present invention has been described by a limited number of embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the following will be described by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims to be described.

10... waste styrofoam 11... foam granules
20... waste PET 21... PET sheet
30... waste vinyl 31... waste vinyl sheet
40...Water-repellent composition 50...Polyurethane insulation
70...closed can 210...stirrer
220...hammer mill 230...foam mold
S110...water foam composition forming step
S120...waste processing step
S130...water foam synthesis step

Claims (10)

A water-foaming composition forming step (S110) of mixing a polyol, a water-foaming agent, and an additive in a stirrer 210 to form a liquid or gel-like water-foaming composition 40;
Waste styrofoam (EPS, 10), waste PET (20), waste vinyl (30), or waste cans of any one or more of the waste cans (70) are crushed or molded into a sheet form, or foam-injected into the water-foaming composition (40). Waste processing step of processing (S120); And
The water-foaming composition step (S130) to form a polyurethane insulating material 50 by synthesizing each other by injecting the water-foaming composition 40 and the processed waste into the foamed mold 230 having the foam-molding space formed therein to form a polyurethane insulating material 50; Method for manufacturing eco-friendly polyurethane insulation that recycles waste.
The method according to claim 1,
The waste is waste styrofoam (10),
In the waste processing step (S120), the waste styrofoam 10 is crushed and processed into a form of granules 11,
In the water-foaming synthesis step (S130), the processed foam granules 11 and the water-foaming composition 40 are mixed, and then injected with a curing agent into the foaming mold 230 with a foamer to expand the foamed water-foaming composition 40 Method for manufacturing an eco-friendly polyurethane insulation material with recycled waste, characterized in that the foam particles (11) are synthesized in a distributed manner.
The method according to claim 2,
In the waste processing step (S120), the crushed foam granules 11 are mixed with a flame retardant coating agent containing phenolic resin to coat the flame retardant coating agent on the surface of the foam granules 11 and to dry the coated flame retardant coating agent.
In the water-foaming synthesis step (S130), a method for manufacturing an eco-friendly polyurethane insulation material with recycled waste, characterized in that a flame retardant coating agent is mixed with the dried foam granules 11 and the water-foaming composition 40.
The method according to claim 3,
In the waste processing step (S120), water is diluted in phenolic resin to mix a flame retardant coating agent having a viscosity of 20° C. / 50 to 100 cps (centipoise) with the foam granules 11, the foam granule 11 and a flame retardant coating agent, and A method of manufacturing an eco-friendly polyurethane insulation material with recycled waste, characterized in that a flame retardant coating agent is coated on the surface of the foam granules 11 by mixing a curing agent in a ratio of 10:7 to 15:0.7 to 1.5.
The method according to claim 4,
In the waste processing step (S120), after drying the flame-retardant coating agent coated on the surface, the waste characterized in that the foam granules 11 are cooled to a temperature of 10° C. to 25° C. so that the particles of the foam grains 11 contract. Recycled eco-friendly polyurethane insulation manufacturing method.
The method according to claim 1,
The waste is waste PET (20),
In the waste processing step (S120), the waste PET 20 is heated, melted, compressed, and processed into a PET sheet 21,
In the water-foaming synthesis step (S130), the water-foaming composition 40 is injected into the foamed mold 230 with a foaming agent together with a curing agent to form a water-foaming composition layer and the PET sheet on the formed water-foaming composition layer ( 21) Wastes characterized by repeatedly synthesizing the water-repellent composition 40 and the PET sheet 21 in a form in which a plurality of water-repellent composition layers and a plurality of PET sheets 21 are alternately laminated. Recycled eco-friendly polyurethane insulation manufacturing method.
The method according to claim 1,
The waste is waste vinyl (30),
In the waste processing step (S120), each waste vinyl 30 is attached to each other in the form of a sheet or heated to melt and then compressed into a sheet to be processed into a waste vinyl sheet 31,
In the water-foaming synthesis step (S130), the water-foaming composition 40 is injected with a curing agent into the foam mold 230 to form a water-foaming composition layer, and the waste vinyl sheet is formed on the formed water-foaming composition layer. (31) by repeating the process of arranging a plurality of water-repellent composition layer and a plurality of waste vinyl sheet (31) alternately stacked in a form in which the water-repellent composition (40) and waste vinyl (30) are mutually synthesized Manufacturing method of eco-friendly polyurethane insulation that recycles waste.
The method according to claim 1,
The waste is a waste can (70),
In the waste processing step (S120), the water-foaming composition 40 is injected into the waste can 40 with a curing agent to process the water-foaming composition 40 to foam inside the waste can 40,
In the water-foaming synthesis step (S130), a plurality of cans 40 in which the water-foaming composition 40 is foamed is disposed at regular intervals inside the foam mold 230, and the foam mold 230 is placed inside the foam foam mold 230. The water-foaming composition 40 is injected with a curing agent, and each waste can 40 is dispersed in the foamed water-foaming composition 40, and the water-foaming composition 40 and the waste can 40 are synthesized with each other. Manufacturing method of eco-friendly polyurethane insulation by recycling waste.
The method according to claim 8,
In the waste processing step (S120), when the foamed foam composition 40 inside the waste can 40 is cured, the foamed foam composition 40 foamed in the water foam synthesis step (S130) and the waste can 40 inside Eco-friendly polyurethane insulation manufacturing method of recycling waste, characterized in that a plurality of through-holes are formed on the surface of the waste can 40 so that the foamed water-foaming composition 40 is adhered to each other.
The method according to any one of claims 2 to 9,
In the step of forming the water-foaming composition (S110),
The first polyol of Mw (Molecular weight) 400, the second polyol of Mw 500, and the third of Mw 1,000 so that the fracture and shrinkage of the water-foaming composition 40 cured through the water-foaming synthesis step (S130) is reduced. A method for manufacturing an environmentally friendly polyurethane insulation material with recycled waste, characterized in that a polyol mixture is formulated in an agitator 210 together with the water blowing agent and additives so that the OH-Value is 300 to 500 or less by mixing the polyol.

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