KR20030079359A - Method for manufacturing the bottom material using the used urethane bumper - Google Patents

Abstract

PURPOSE: A method for manufacturing floor covering using waste urethane bumper is provided to recycle resources and conserve environment by recycling the waste urethane bumper as adhering material or floor covering material. CONSTITUTION: The method for manufacturing floor covering using waste urethane bumper comprises the steps of collecting the pulverized waste urethane bumper chips by shredding waste urethane bumper for automobiles into polyurethane chip having size of 1.5 mm or less; agitating the raw materials by physical mixing of 5 to 15 wt.% of the collected polyurethane chips with polyol and isocyanate at 60 deg.C; and injecting the agitated mixture into a mold for 2 to 4 minutes, and completely hardening the polyurethane form by demolding polyurethane form after a certain period of time, wherein the mixing process is performed at a temperature of 58 to 62 deg.C.

Description

Method for manufacturing the bottom material using the used urethane bumper}

The present invention relates to a flooring manufacturing method using waste urethane bumpers, and more particularly, to a flooring manufacturing method using waste urethane bumpers that can be used to recycle resources and to preserve the environment by using waste urethane bumpers.

In general, it is clear that environmental problems at global scale, such as global warming, acid rain and ozone depletion, are both important challenges to be solved at the beginning of the 21st century and at the same time our own problems. The big problems that surface when considering the global environmental problem, especially the carbon dioxide problem, are the resource, energy and waste problems.

The amount of plastic discarded due to the high economic growth is also increasing every year, and their disposal is currently disposed of landfill and incineration. In this case, additives such as endocrine disrupting substances are eluted, and there are various problems such as waste gas and wastewater treatment as well as contamination of groundwater and rivers and lack of landfill.

Therefore, there is a strong demand for recycling, and there are two ways to recycle them: physical, chemical, and thermal or energy.

Physical property recycling is a technique of reusing waste material. The recovered waste plastic is transported to a regeneration treatment facility, and then sorted by metals and resins first, and then metals are removed again, followed by washing, foreign material separation, drying and pelletization.

Chemical recycling is a method in which plastic is thermally decomposed or chemically treated to make low molecular weight and used as a chemical raw material and a fuel. Examples thereof include pyrolysis emulsification and hot gasification.

Thermal recycling is a method in which waste plastic is crushed and assembled into fuel in a blast furnace.

However, the problem of recycling waste plastics is not actually activated due to the practical difficulties of economics and competitiveness.

The present invention has been made in order to solve the above problems according to the prior art, the object of the present invention is to recycle waste urethane bumper, which is dead every year in a huge amount of waste plastics, such as adhesive material or flooring material. By recycling, the present invention provides a method for manufacturing flooring using waste urethane bumpers that can achieve a positive effect on recycling waste resources, preserving the environment, and preserving the ecosystem.

Flooring manufacturing method using the waste urethane bumper according to the present invention for achieving the above object is

a) collecting the waste urethane bumper of the car by crushing to a certain size particle size,

b) stirring the collected milled product with physical mixing with polyol and isocyanate, and

c) injecting the stirred mixture into a mold and demolding the polyurethane foam after a predetermined time to completely cure the mold;

d) The temperature for mixing in step b) is a flooring manufacturing method using a waste urethane bumper to 58 ~ 62 ℃.

As the sample of the present invention, the waste urethane bumper is crushed, and the particle size (Waste Polyurethane Granule, hereinafter referred to as 'PUG') is 1.0 to 1.5 mm (hereinafter referred to as 'A') and 1.0 to 0.5 mm (hereinafter referred to as 'B'). ) And 0.5mm or less (hereinafter referred to as 'C'), which is divided into three types, and samples are collected by the cone quarter method.

The sample for each particle size collected is stirred by physical mixing with polyol (Polyol: PPG-7850 system) and isocyanate (Isocianate: NS-595: manufactured by DOW), and then the stirred mixture is injected into a mold. After a predetermined time, the mold is demoulded and the physical properties of the flooring specimens for complete hardening (crosslinking) are measured.

Here, the stirring conditions are as follows. The mixing time is 7 seconds, the mixing speed is 5000rpm, the temperature is room temperature (23-25 ℃), the temperature of polyol and isocyanate is 22-25 ℃, and the mixing type is IKKA RE66-1.

On the other hand, while stirring the polyol and the isocyanate, it was stirred for each of Samples A, B, and C while the PUG content was fixed at 10% by weight, and for the sample B, the PUG content was 5% by weight, 10% by weight, and 15% by weight. Each of them is adjusted to% to make specimens for flooring and to investigate their properties.

The molded specimens shall be manufactured under the following conditions. The size of PUG is 1.0 ~ 1.5mm, B sample is 1.0 ~ 0.5mm, C sample is 0.5mm or less, and PUG content is 5%, 10%, 15% by weight The mold size is 200 mm * 200 mm * 10 mm, the temperature of the mold is 60 ° C ± 2, demolding in 3 minutes ± 1 in the mold.

The physical properties of the prototype molded under the above conditions are as follows. When the specimen for flooring was made from the sample adjusted to 0.5 ~ 1.0mm particle size (B), the result of the test by PUG content can be obtained as shown in Table 1 below.

The PUG is fixed at 10% by weight and casted for each particle size (A, B, C). As a result, the result shown in Table 2 can be obtained.

As a result of using the waste urethane bumper as the above, the prototype of the flooring material was produced. As a result of the use of the flooring material, there is almost no difference in physical properties when compared to the existing product. You can get it.

The present invention collects urethane bumpers, which have been incinerated or landfilled in the prior art, and recycled flooring materials, which are recycled through crushing, mixing, and molding, have little difference in physical properties when compared to conventional products, thereby reducing pollution through resource recycling. Recycling and recycling of waste materials has led to innovative reductions in costs, and is in line with the big propositions of resource conservation and environmental conservation.

Claims (9)

In the flooring manufacturing method using the waste urethane bumper, a) collecting the waste urethane bumper of the car by crushing to a certain size particle size, b) stirring the collected milled product with physical mixing with polyol and isocyanate, and c) a method of manufacturing a flooring material using a waste urethane bumper comprising the step of injecting the stirred mixture into a mold and demolding the polyurethane foam after a predetermined time passes to completely harden it; d) In the step b), the temperature for mixing is a flooring manufacturing method using a waste urethane bumper is 58 ~ 62 ℃. The method of claim 1, A) the size of the granulated granules (Polyurethane Granule) pulverized in the collecting process to less than 0.5mm, The b) flooring manufacturing method using the waste urethane bumper, characterized in that the content of the particle size in the mixing step to 10% by weight (part by weight). The method of claim 1, A) the size of the particle size pulverized in the collecting process is 0.5 ~ 1.0mm, The b) flooring manufacturing method using the waste urethane bumper, characterized in that the content of the particle size in the mixing process to 5% by weight. The method of claim 3, wherein A flooring manufacturing method using the waste urethane bumper, characterized in that the content of the particle size to 10% by weight. The method of claim 3, wherein A flooring manufacturing method using the waste urethane bumper, characterized in that the content of the particle size to 15% by weight. The method of claim 1, A) the size of the particle size pulverized in the collecting process to 1.0 ~ 1.5mm, The b) flooring manufacturing method using the waste urethane bumper, characterized in that the content of the particle size in the mixing step 10% by weight. The method of claim 1, The method of manufacturing a flooring material using the waste urethane bumper, characterized in that the time for injecting the mixture into the mold in the molding step c) 3 minutes. The method of claim 1, The method of manufacturing a flooring material using the waste urethane bumper, characterized in that the time for injecting the mixture into the mold in the molding step c). The method of claim 1, The method for producing a flooring material using the waste urethane bumper is a temperature for mixing in step b) to 60 ℃.