KR101578041B1 - A production method of elastic pavement by using Eco-friendly polyurethane chip - Google Patents
A production method of elastic pavement by using Eco-friendly polyurethane chip Download PDFInfo
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- KR101578041B1 KR101578041B1 KR1020150071611A KR20150071611A KR101578041B1 KR 101578041 B1 KR101578041 B1 KR 101578041B1 KR 1020150071611 A KR1020150071611 A KR 1020150071611A KR 20150071611 A KR20150071611 A KR 20150071611A KR 101578041 B1 KR101578041 B1 KR 101578041B1
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- polyurethane
- packaging material
- chip
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C15/00—Pavings specially adapted for footpaths, sidewalks or cycle tracks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
Abstract
Description
The present invention relates to a method of manufacturing an elastic packaging material using an environmentally friendly polyurethane chip, and more particularly, to a method of manufacturing a polyurethane chip by separating a thermosetting waste polyurethane into polyester series and polyether series, It is possible to keep the elasticity of the elastic packaging material constant due to the excellent physical properties of the polyurethane chip by installing the elastic packaging material by using the polyurethane chip prepared by melting the polyether-series resin in a rotary type stirrer The present invention also relates to a method of constructing an elastic packaging material using an environmentally friendly polyurethane chip, which is characterized in that the elderly can walk comfortably and is not easily broken even under a strong impact.
Polyurethane, which is widely used in materials such as shoes, refrigerators, and vehicles that mass-produce many wastes as the industry develops, is rich in calorific value, so it is deserved to be recycled with various materials. However, There is a problem that environmental pollution is caused by incineration or landfill mainly without showing value.
In recent years, various methods for recycling waste tires have been sought in order to recycle the above-mentioned industrial wastes. Among them, a method of using the waste tires in a circular state such as military training, civil works, landfill, However, in the case of a circular shape, the tire is a degradation-resistant material, so that there is a problem that the environmental problem lasts for a long period of time. In the case of using the heat, There are environmental problems causing secondary pollutants generated in the process.
Therefore, in order to solve the above-mentioned problems, research and development and patent applications have been made. In the patent publications 10-2002-0072499 (2002.09.16) and 10-2002-0072500 (2002.09.16) In the case of packaging materials using EPDM chips or SBR chips used as packaging materials, properties such as shrinkage expansion coefficient and weather resistance differ from those of polyurethane adhesives (binders), resulting in poor durability of packaging materials and dark or monotone color. In addition, the rubber-elastic packaging material has a complicated manufacturing process and has a problem in that it smells unique to rubber (EPDM, SBR, etc.) in summer.
On the other hand, as a conventional wrapping material for a sidewalk, a bicycle road, a park walkway, etc., concrete made of a mixture of stone and cement, which are inorganic materials, or some color cones, pitcher cones,
However, since the concrete molding product has a high strength, the impact on the ground surface is large, and concrete pavement block and color cone are excellent in hardness, heat resistance and weatherability, but are vulnerable to weak impact. However, There is a problem that the elderly people use it because of the feeling of hardness and shock absorbing power.
Accordingly, in order to solve the above-mentioned problems, a variety of waste polyurethanes are collected and packaged in Patent Documents 10-0390926 (2003.07.12) and 10-0484381 (2005.04.20) However, when the polyurethane is melted due to the mixing of the polyurethanes having different melting points as described above, a part of the packaging material is not melted when the polyurethane is melted. Therefore, the inherent physical properties of the polyurethane are destroyed and hardened, There is a problem that the elasticity of the elastic member is deteriorated.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing a polyurethane chip by separating a thermosetting waste polyurethane into a polyester series and a polyether series to produce a polyester- By using the polyurethane chips prepared by melting the polyurethane chips while injecting them in stages in an agitator, the elastic polyurethane is melted in a state in which the conventional polyester-based and polyether-based resins are not separated, The physical properties inherent to the polyurethane are destroyed and the surface of the applied polyurethane is broken. However, in the case of the present invention, since the physical properties of the polyurethane chip can be constantly maintained, Maintain the surface elasticity for a long time Using Eco polyurethane chip, it characterized in that there is provided a construction method of the resilient packing material.
The present invention relates to a polyurethane resin composition which is excellent in mechanical properties such as heat resistance and weather resistance by using an elastic packaging material prepared by adding a polyurethane binder mixed with diphenylmethane diisocyanate and polypropylene glycol- The present invention also provides a method of constructing an elastic packaging material using an environmentally friendly polyurethane chip, which is characterized in that it is not easily broken and can maintain a strong elasticity and absorbs shocks when walking. have.
According to an aspect of the present invention, there is provided a method of manufacturing a semiconductor device, including: 1) a packaging surface cleaning step of removing moisture and foreign matter distributed on a packaged surface;
2) a primer layer forming step of applying a primer to the packaging surface;
3) an elastic packaging material manufacturing step of mixing 20 to 30 parts by weight of a polyurethane binder with 100 parts by weight of a polyurethane chip to produce an elastic packaging material;
4) applying an elastic packaging material to the surface of the primer layer to apply the elastic packaging material prepared in the step 3);
5) a coating surface voltage step in which a low-temperature thermostatic roller coated with 20 to 30 kg of Teflon on the surface of the elastic packaging material is subjected to voltage 2 to 4 times while maintaining the surface temperature of the roller at 60 to 80 ° C;
6) In the step 5), the surface of the elastic packaging material, which is not exposed to the low-temperature thermo-sensitive roller, and the finished part are cured by grinding the surface with a Teflon-coated trowel in a thickness of 0.1 to 0.5 mm. do.
The primer is a mixture of 100 parts by weight of the polyol mixture and 50 to 100 parts by weight of a solubilizer in which the chloroprene rubber and the solvent are mixed in a weight ratio of 1:
1 to 3 parts by weight of dimethylacetamide (DMAC) is added to 100 parts by weight of polyester-based thermosetting waste polyurethane pulverizer in a rotary mixer in which the internal temperature of the polyurethane chip is maintained at 140 to 210 DEG C, ≪ / RTI >
A secondary melting step in which 10-15 parts by weight of pulverized polyether thermosetting waste polyurethane is added to a rotary type stirrer in which the primary melting step is carried out and the mixture is melted for 10 to 15 minutes;
40 to 60 parts by weight of polyether-based thermosetting waste polyurethane fibers, 60 to 90 parts by weight of calcium carbonate and 1 to 5 parts by weight of pigment are added to 100 parts by weight of the thermosetting waste polyurethane resin melted in the secondary melting step, And melted in a gel state for 3 to 5 minutes;
The molded polyurethane resin melted in the gel state is molded by an extruder, and the molded product is pulverized to a size of 1 to 4 mm by a pulverizer.
The method for manufacturing the elastic packaging material using the environmentally friendly polyurethane chip according to the present invention having the above-mentioned structure is characterized in that when the thermosetting waste polyurethane is separated into a polyester series and a polyether series and a polyurethane chip is produced, By using the polyurethane chips prepared by melting the pulverized product of the polyurethane chips prepared in the stepwise manner in the rotary type stirrer as the raw materials of the elastic packaging material, the physical properties of the polyurethane chips are excellent and the elasticity of the applied elastic packaging materials can be maintained constant, Can be easily walked, and is excellent in mechanical properties, so that it is not easily broken even in a strong impact.
In addition, the present invention can add various color pigments to the polyurethane chip, so that the color of the applied surface can be expressed in appropriate color, and the waste polyurethane, which is continuously generated, is recycled, There is an advantage to enjoy the economic effect.
In order to accomplish the above-mentioned effects, the present invention relates to a method of constructing an elastic packaging material using an environmentally friendly polyurethane chip, and only a part necessary for understanding the present invention will be described, It will be omitted within the scope of the present invention.
The present invention provides: 1) a packaging surface cleaning step of removing moisture and foreign matter distributed on a packed surface;
2) a primer layer forming step of applying a primer to the packaging surface;
3) an elastic packaging material manufacturing step of mixing 20 to 30 parts by weight of a polyurethane binder with 100 parts by weight of a polyurethane chip to produce an elastic packaging material;
4) applying an elastic packaging material to the surface of the primer layer to apply the elastic packaging material prepared in the step 3);
5) a coating surface voltage step in which a low-temperature thermostatic roller coated with 20 to 30 kg of Teflon on the surface of the elastic packaging material is subjected to voltage 2 to 4 times while maintaining the surface temperature of the roller at 60 to 80 ° C;
6) The step of hardening the surface of the elastic packaging material and the finishing portion, which are not contacted by the low-temperature thermo-sensitive roller in step 5), with a Teflon-coated trowel in a thickness of 0.1 to 0.5 mm to cure the coated surface. And a method of constructing an elastic packaging material using a polyurethane chip.
In the present invention, the step (1) is a packaging surface cleaning step for removing moisture and foreign matter distributed on a packed surface. In order to remove moisture and foreign matter distributed on the packaging surface, the primer is penetrated into the packaging surface so that the elastic packaging material in which the polyurethane chip and the polyurethane binder are mixed is applied in order to firmly adhere to the packaging surface. If moisture or foreign matter distributed on the packaging surface is not removed, the primer may not penetrate smoothly on the packaging surface, and the elastic packaging material may not be firmly adhered to the packaging surface.
In the present invention, the step 2) is a primer applying step of applying a primer to the packaging surface to adhere the elastic packaging material mixed with a polyurethane chip and a polyurethane binder to the packaging surface. The primer applied to the packaging surface is a mixture of 100 parts by weight of a polypropylene glycol-polyol having a molecular weight of 1,000 to 4,000 and 50 to 100 parts by weight of a solvent in which chloroprene rubber and a solvent are mixed in a weight ratio of 1: 1, When the primer is applied to the pavement surface, the primer is strongly adhered to the pavement surface within a short period of time because of its excellent adhesion property and short curing time. In the above, the polyol is a polymer compound having a hydroxyl group. The solvent is preferably selected from among ketones, esters and alcohols, but is not particularly limited.
When the solvent is mixed in an amount of less than 50 parts by weight based on 100 parts by weight of the polypropylene glycol-polyol having a molecular weight of 1,000 to 4,000, the primer may not completely dissolve the polyol due to the insufficient amount of the solubilizer, And when the solubilizer is mixed in an amount of more than 100 parts by weight based on 100 parts by weight of the polyol, the polyol may be completely dissolved in excess of the amount of the solubilizer compared to the polyol, but the viscosity of the primer may not be uniformly applied to the packaging surface.
The application amount of the primer is preferably 0.5 to 1 L per 1 m 2 uniformly. When the application amount of the primer is less than 0.5 L / m 2, there is a possibility that the amount of the primer applied is insufficient and the penetration amount of the primer on the packaging surface is lowered. When the application amount of the primer exceeds 1 L / m 2, Although the application amount of the primer is sufficient and the penetration amount of the primer can be improved, the effect is insufficient compared to the application amount.
In the present invention, in the step 3), 20 to 30 parts by weight of a polyurethane binder is mixed with 100 parts by weight of a polyurethane chip on a primer-coated surface to produce an elastic packaging material.
If the mixing amount of the polyurethane binder is less than 20 parts by weight based on 100 parts by weight of the polyurethane chips, the polyurethane chips may not be completely mixed due to the lowering of the mixing amount of the polyurethane binder, When the mixing amount of the urethane binder is more than 30 parts by weight based on 100 parts by weight of the polyurethane chip, the elastic packaging material in which the polyurethane chips are completely mixed can be produced. However, since the viscosity of the elastic packaging material is low, There is a fear that the property may deteriorate.
On the other hand, the polyurethane binder is a propylene ethylene oxide glycol copolymer prepared by mixing polypropylene glycol having a molecular weight of 1,000 to 4,000 as a polyol or 1 to 50 parts by weight of polypropylene glycol having 1,000 to 4,000 in 100 parts by weight of propylene oxide glycol And 1,3-butanediol or 1,4-butanediol is mixed with 0.5 to 3 parts by weight of the propylene oxide glycol in 100 parts by weight of the propylene oxide glycol.
Hereinafter, a method of manufacturing a polyurethane chip used in the present invention will be described.
The polyurethane chips used in the present invention are prepared by adding 1 to 3 parts by weight of dimethylacetamide (DMAC) to 100 parts by weight of polyester-based thermosetting waste polyurethane pulverized product in a rotary mixer in which the internal temperature is maintained at 140 to 210 ° C First melt for 10 to 15 minutes.
If the internal temperature of the rotary stirrer, the amount of dimethylacetamide mixed and the melting time are out of the above ranges, the meltability of polyester thermosetting waste polyurethane may be lowered. The size of the pulverized waste material is preferably 20 mm or less.
In the present invention, 10 to 15 parts by weight of a polyether-based thermosetting waste polyurethane pulverized product is added to a rotary stirrer in which the first melting step is performed, and the product is secondarily melted for 10 to 15 minutes. If the melting time of the polyether thermosetting waste polyurethane and the polyether thermosetting waste polyurethane are out of the above ranges, there is a fear that the polyether-based thermosetting waste polyurethane pulverizer is not completely dissolved. The size of the pulverized waste material is preferably 20 mm or less.
Further, the present invention provides a thermoplastic resin composition comprising 40 to 60 parts by weight of a polyether thermosetting waste polyurethane fiber, 60 to 90 parts by weight of calcium carbonate, and 1 to 5 parts by weight of a pigment, based on 100 parts by weight of the thermosetting waste polyurethane resin melted in the secondary melting step The mixture is put into the rotary type stirrer and melted in a gel state for 3 to 5 minutes.
The thermosetting waste polyurethane fiber serves as a reinforcing agent for strengthening the strength by bonding the molten polyester resin and the polyether resin to each other. The amount of the thermosetting waste polyurethane fiber to be used is 40 to 60 weight parts per 100 weight parts of the thermosetting waste polyurethane resin It is preferable to mix the components. When the mixing amount of the thermosetting waste polyurethane fibers is less than 40 parts by weight, the bonding strength between the molten polyester resin and the polyether resin may be lowered. When the mixing amount of the thermosetting waste polyurethane fibers exceeds 60 parts by weight, The bonding strength between the polyester-based resin and the polyether-based resin can be improved, but the function of the polyurethane chip may deteriorate due to a decrease in the amount of the other additives. The size of the waste polyurethane fiber is preferably 20 mm or less.
The calcium carbonate serves to improve the mechanical properties such as the hardness and the elasticity of the polyurethane chip. The amount of the calcium carbonate used is preferably 60 to 90 parts by weight based on 100 parts by weight of the thermosetting waste polyurethane resin. If the mixing amount of the calcium carbonate is less than 60 parts by weight, the mechanical properties of the polyurethane chip may be deteriorated. If the mixing amount of the calcium carbonate is more than 90 parts by weight, the mixing amount of the polyurethane chips May be deteriorated.
In the above, the pigment serves to indicate the color of the polyurethane chip, and the amount of the pigment is preferably 1 to 5 parts by weight based on 100 parts by weight of the thermosetting waste polyurethane resin. When the mixing amount of the pigment is less than 1 part by weight, there is a possibility that the color to be expressed by the decrease in the mixing amount of the pigment may not be clearly expressed. When the mixing amount of the pigment exceeds 5 parts by weight, It is too strong and may cause color change. The pigment to be used in the present invention is not particularly limited, and a suitable pigment may be selected from organic pigments and inorganic pigments according to the needs of the consumer or the manufacturer.
On the other hand, as described above, the mixture charged into the rotary type stirrer is melted in a gel state for 3 to 5 minutes, molded by an extruder, and then the formed product is pulverized to a size of 1 to 4 mm by a pulverizer to produce a polyurethane chip. If the melting time and the particle size of the polyurethane chip are less than the above ranges, the charged mixtures may not be completely melted or the particles of the molded product may be too small to reduce the mechanical properties. The melting time and the particle size of the polyurethane chips Exceeds the above range, the charged mixture can be completely melted but its effect is insufficient compared with the energy consumption. In addition, if the particles of the molded product are too large, the surface area becomes smaller than the amount of the polyurethane chips used, and the adhesiveness with the polyurethane binder is deteriorated, thereby deteriorating the mechanical properties.
In the present invention, the step 4) is a step of applying the elastic packaging material prepared in the step 3) to the surface of the primer layer. The thickness to be applied to the surface of the primer layer is not particularly limited and may be appropriately applied depending on the needs of the customer or the needs of the customer, but it is preferable to coat the primer layer with a thickness of preferably 10 to 30 mm.
In the present invention, in step 5), the surface of the primer layer is coated with 20 to 30 kg of Teflon on the surface of the primer layer in step 4), and the surface temperature of the roller is maintained at 60 to 80 ° C It is the step of voltage 2 ~ 4 times. If the voltage is less than the above-mentioned condition, the surface of the elastic packaging material may not be sufficiently voltage, and the life of the elastic packaging material may be shortened. If the voltage is higher than the above condition, May be sufficiently voltage, but the mechanical properties of the elastic packaging material may be deteriorated due to the high temperature of the roller.
In the present invention, step 6) is a step of hardening the coated surface and the finished part of the elastic packaging material, which are not exposed to the low-temperature heating roller in step 5), with a Teflon coated trowel in a thickness of 0.1 to 0.5 mm. If the thickness of Teflon coated on the trowel is less than 0.1 mm, the stability of the elastic packaging material may deteriorate due to the decrease of the thickness of the coated Teflon. If the thickness of Teflon coated on the trowel exceeds 0.5 mm, Teflon is too thick to reduce the workability of the surface. In this case, the curing time of the elastic packaging material is generally set to be completely cured after 12 hours, but a preferable curing time is 15 to 20 hours.
On the other hand, since the Teflon-coated low-temperature thermostatic roller and the trowel used in the present invention are coated with the non-adhesive Teflon, it is possible to maintain the stability of the elastic packaging material even at high surface temperatures, There are advantages to that.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the following examples. However, the present invention is not limited to the following examples.
(Example 1) Production of polyurethane chips
1. Collection and selection of waste polyurethane
The thermosetting waste polyurethane to be recovered was recovered and separated into a polyester series and a polyether series, and each was pulverized to 20 mm or less.
2. Melting
2 kg of dimethylacetamide (DMAC) was added to 100 kg of the polyester-based thermosetting waste polyurethane pulverized product at an internal temperature of 200 ° C. and melted for 12 minutes. Then, a polyether-based thermosetting waste polyurethane 13 kg of pulverized product was added and melted for 12 minutes. Then, 50 kg of polyether-based thermosetting waste polyurethane fiber pulverized to 20 mm or less, 70 kg of calcium carbonate, 50 kg of pigment (product name: Tanax Yellow) 4 kg was added and melted in a gel state for 4 minutes.
3. Forming and grinding
The melt melted in the gel state in 2 above was molded into a sheet having a thickness of 10 to 15 mm and then pulverized to a size of 4 mm or less by a pulverizer to produce a polyurethane chip.
(Example 2)
1. Preparation of specimens
The specimens of Examples 2-1 to 2-3 and Comparative Examples 2-1 to 2-2 were produced according to KS F 6518 (vulcanized rubber physical test method) according to the following method. However, the EPDM chip of 4 mm or less was used for the chip used in Comparative Example 2-1, and the SBR chip of 4 mm or less was used for the chip used in Comparative Example 2-2.
A specimen was prepared by mixing 1 part by weight of a veneer plate with 100 parts by weight of a polypropylene glycol-polyol having a molecular weight of 2,000 and 70 parts by weight of a solubilizer mixed with chloroprene rubber and methyl isobutyl ketone in a weight ratio of 1: To form a primer layer, and then the elastic packaging material prepared in Examples 2-1 to 2-3 and Comparative Examples 2-1 to 2-2 in Table 1 was applied to the surface of the primer layer Next, the surface temperature was maintained at 70 ° C, and a low-temperature constant temperature roller coated with 25 kg of Teflon was applied three times to produce a 15 mm thick elastic packaging material, which was cured for 15 hours to prepare a sample according to KS F 6518.
Note 1) The binder is a polypropylene glycol-polyol having a molecular weight of 2,000.
2. Evaluation and Results
In Examples 2-1 to 2-3 and Comparative Examples 2-1 and 2-2, tensile strength and elongation were measured according to KS F 6518 (physical test method for vulcanized rubber), and the results are shown in Table 2.
According to the above Table 2, in Examples 2-1 to 2-3, the polyurethane chips and the polyurethane binder were mixed within the range required by the present invention to produce an elastic foam, and mechanical properties such as tensile strength and elongation It is evaluated that it is able to maintain the elasticity of the elastic packaging material for a long period of time and is not easily broken even under a strong impact.
On the other hand, in the case of Comparative Example 2-1, the mechanical properties in terms of tensile strength and elongation are close to the KS quality standard due to the use of the EPDM chip, but there is a problem that the elasticity is lowered after a certain period of time due to the limit of shrinkage and expansion coefficient Lt; / RTI >
In the case of Comparative Example 2-2, the mechanical properties in terms of tensile strength and elongation were satisfied with the KS quality standard by using the SBR chip. However, after a certain period of time, the physical properties such as shrinkage, expansion coefficient and weather resistance reached a limit, The strength was evaluated to be lowered.
While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.
Claims (4)
2) a primer layer forming step of applying a primer to the packaging surface;
3) an elastic packaging material manufacturing step of mixing 20 to 30 parts by weight of a polyurethane binder with 100 parts by weight of a polyurethane chip to produce an elastic packaging material;
4) applying an elastic packaging material to the surface of the primer layer at a thickness of 10 to 30 mm;
5) a coating surface voltage step in which a low-temperature thermostatic roller coated with 20 to 30 kg of Teflon on the surface of the elastic packaging material is subjected to voltage 2 to 4 times while maintaining the surface temperature of the roller at 60 to 80 ° C;
6) The step of curing the surface of the elastic packaging material and the finishing portion, which are not contacted by the low-temperature heating roller in step 5), with a Teflon-coated trowel in a thickness of 0.1 to 0.5 mm,
The polyurethane binder in the step 3) is obtained by mixing 1 to 50 parts by weight of a polypropylene glycol-polyol having a molecular weight of 1,000 to 4,000 with 100 parts by weight of propylene oxide glycol and 0.5 to 5 parts by weight of a chain extender 0.5 selected from 1,3-butanediol or 1,4- To 3 parts by weight of a propylene-ethylene oxide-glycol copolymer obtained by polymerizing a propylene-ethylene-oxide-glycol copolymer.
Wherein the primer is a mixture of 100 parts by weight of a polypropylene glycol-polyol having a molecular weight of 1,000 to 4,000 and 50 to 100 parts by weight of a solvent in which chloroprene rubber and a solvent are mixed in a weight ratio of 1: Construction method of packaging material.
1 to 3 parts by weight of dimethylacetamide (DMAC) is added to 100 parts by weight of polyester-based thermosetting waste polyurethane pulverizer in a rotary mixer in which the internal temperature of the polyurethane chip is maintained at 140 to 210 DEG C, ≪ / RTI >
A secondary melting step in which 10-15 parts by weight of pulverized polyether thermosetting waste polyurethane is added to a rotary type stirrer in which the primary melting step is carried out and the mixture is melted for 10 to 15 minutes;
40 to 60 parts by weight of polyether-based thermosetting waste polyurethane fibers, 60 to 90 parts by weight of calcium carbonate and 1 to 5 parts by weight of pigment are added to 100 parts by weight of the thermosetting waste polyurethane resin melted in the secondary melting step, And melted in a gel state for 3 to 5 minutes;
Wherein the molded polyurethane resin melted in the gel state is molded by an extruder, and then the molded product is pulverized to a size of 1 to 4 mm by a pulverizer.
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| KR1020150071611A KR101578041B1 (en) | 2015-05-22 | 2015-05-22 | A production method of elastic pavement by using Eco-friendly polyurethane chip |
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| KR1020150071611A KR101578041B1 (en) | 2015-05-22 | 2015-05-22 | A production method of elastic pavement by using Eco-friendly polyurethane chip |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190000164A (en) * | 2017-06-22 | 2019-01-02 | 박성준 | Method for paving eco-friendly elastic paving materials |
| KR20230124133A (en) | 2022-02-17 | 2023-08-25 | 에코리엔트샤인 (주) | Luminous elastic chip composition, elastic flooring material comprising the same and constructing method using the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060012187A (en) * | 2004-08-02 | 2006-02-07 | 주식회사 소일콘 | The packing method oh urethane - elasticity with the reforming urethane binder for elasticity - packing use |
| KR101223923B1 (en) * | 2012-08-30 | 2013-01-21 | 주식회사 한길산업 | Primer for polyurethane |
-
2015
- 2015-05-22 KR KR1020150071611A patent/KR101578041B1/en active IP Right Grant
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060012187A (en) * | 2004-08-02 | 2006-02-07 | 주식회사 소일콘 | The packing method oh urethane - elasticity with the reforming urethane binder for elasticity - packing use |
| KR101223923B1 (en) * | 2012-08-30 | 2013-01-21 | 주식회사 한길산업 | Primer for polyurethane |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190000164A (en) * | 2017-06-22 | 2019-01-02 | 박성준 | Method for paving eco-friendly elastic paving materials |
| KR102032778B1 (en) * | 2017-06-22 | 2019-10-17 | 박성준 | Method for paving eco-friendly elastic paving materials |
| KR20230124133A (en) | 2022-02-17 | 2023-08-25 | 에코리엔트샤인 (주) | Luminous elastic chip composition, elastic flooring material comprising the same and constructing method using the same |
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