KR101036667B1 - Recycling method of waste polyurethane sheet - Google Patents
Recycling method of waste polyurethane sheet Download PDFInfo
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- KR101036667B1 KR101036667B1 KR20100099477A KR20100099477A KR101036667B1 KR 101036667 B1 KR101036667 B1 KR 101036667B1 KR 20100099477 A KR20100099477 A KR 20100099477A KR 20100099477 A KR20100099477 A KR 20100099477A KR 101036667 B1 KR101036667 B1 KR 101036667B1
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 40
- 239000004814 polyurethane Substances 0.000 title claims abstract description 40
- 239000002699 waste material Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004064 recycling Methods 0.000 title claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000007872 degassing Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000004094 surface-active agent Substances 0.000 claims abstract description 3
- 239000007791 liquid phase Substances 0.000 claims abstract 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 6
- 230000008929 regeneration Effects 0.000 abstract description 3
- 238000011069 regeneration method Methods 0.000 abstract description 3
- 230000001172 regenerating effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 239000002649 leather substitute Substances 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
본 발명은 가방이나 신발, 각종 의류에 사용되는 폴리우레탄 시트를 버핑 가공할 때 발생하는 가루 또는 재단 자투리와 같은 폐 폴리우레탄의 재생방법에 관한 것으로서, 보다 상세하게는 저렴한 재생 비용으로 원자재로 사용할 수 있는 재생 액상원료를 제공할 수 있는 폐 폴리우레탄의 재생방법을 제공코자 하는 것이다.
즉, 본 발명은 폴리우레탄 시트를 제조 및 가공하거나 재단 사용함에 있어 대량으로 발생하는 버핑 가루와 재단 자투리인 폐 폴리우레탄 시트의 재생방법에 있어서,
밀폐용기에 중량비로 폐 폴리우레탄25%에 용해제로 DMF(dimethylformamide)75%를 투입한 상태에서 폐 폴리우레탄과 용해제의 전체중량의 0.5~1%에 해당하도록 중화제로 계면활성제를 투입한 상태에서, 25~35℃ 온도 하에서 18~22시간 연속적 교반한 후 밀폐용기의 내부 압력을 대기압으로 낮추고 교반 과정에서 발생한 가스를 액상에서 분리 배출하는 탈포작업을 행하는 것이다.The present invention relates to a method of reclaiming waste polyurethane such as powder or cut pieces generated when buffing a polyurethane sheet used in bags, shoes, and various clothes, and more specifically, can be used as raw materials at low regeneration costs. It is an object of the present invention to provide a recycling method of waste polyurethane that can provide a recycled liquid raw material.
That is, the present invention relates to a method for regenerating waste polyurethane sheets which are buffing powders and cutting edges generated in large quantities in manufacturing, processing or cutting polyurethane sheets,
In a state in which a surfactant is added as a neutralizing agent so as to correspond to 0.5-1% of the total weight of the waste polyurethane and the solvent, with 25% of the waste polyurethane and 75% of the DMF (dimethylformamide) as the solvent. After 18-22 hours of continuous stirring at 25-35 ℃ temperature, the internal pressure of the closed vessel is lowered to atmospheric pressure and degassing is performed to separate and discharge the gas generated in the stirring process from the liquid phase.
Description
본 발명은 가방이나 신발, 각종 의류에 사용되는 인조가죽인 폴리우레탄 시트를 버핑 가공할 때 발생하는 가루 또는 재단 자투리와 같은 폐 폴리우레탄의 재생방법에 관한 것으로서, 보다 상세하게는 저렴한 재생 비용으로 원자재로 사용할 수 있는 재생 액상원료를 제공할 수 있는 폐 폴리우레탄의 재생방법을 제공코자 하는 것이다.The present invention relates to a method of reclaiming waste polyurethane such as powder or cut pieces generated when buffing a polyurethane sheet of artificial leather used in bags, shoes, and various clothes, and more particularly, at a low regeneration cost. It is to provide a method of recycling waste polyurethane that can provide a recycled liquid raw material that can be used as.
가방이나 신발, 각종 의류에 사용되는 인조가죽인 폴리우레탄 시트는 액상원료를 이용하여 시트를 만들고, 시트의 표면 질감이 가죽과 같은 느낌이 들도록 하기 위해서 한쪽 면을 버핑하는 작업을 행한 후 보빈에 권취하여 소요처로 제공하게 된다.Polyurethane sheet made of artificial leather used in bags, shoes, and various kinds of clothes is made of liquid raw materials, and the surface texture of the sheet is buffed on one side to make it feel like leather. Will be taken and provided to the requirements.
상기한 시트를 제조하는 작업을 위해 행하는 버핑 작업에서 대량의 버핑 가루가 발생하고, 또한 보빈에 감는 과정에서 양단부를 재단함으로 해서 발생하는 재단 자투리도 상당량 배출된다.A large amount of buffing powder is generated in the buffing operation performed for the work for producing the sheet, and a considerable amount of cutting stalks generated by cutting both ends in the process of winding on the bobbin is also discharged.
또한 가방이나 신발, 각종 의류를 제조하기 위해서 인조가죽인 폴리우레탄 시트를 재단하는 과정에서도 대량의 자투리가 발생하고 있다.In addition, in order to cut the artificial leather polyurethane sheet for the production of bags, shoes, and various garments, a large amount of dropping occurs.
그러나 상기한 종래 버핑 가루 및 재단 자투리 등은 특정 폐기물로 분류되어 대부분 소각 처리되었다.
However, the above-mentioned conventional buffing powder, cuttings and the like are classified as specific wastes and are mostly incinerated.
근자에는 원자재 값 상승으로 이들 버핑 가루 및 재단 자투리를 재활용 하고자 노력하고 있으나, 실질적으로 재활용에 따른 제반 비용 문제로 인해 현실화 되지 못하고 있는 실정이다.In recent years, efforts have been made to recycle these buffing powders and cuttings due to rising raw material prices, but they have not been realized due to the costs associated with recycling.
이에 본 발명자는 종래 폐기물로 버려지던 버핑 가루 및 재단 자투리 등의 폐 폴리우레탄을 저렴한 재생비용으로 액상 원료로 환원하여 사용할 수 있게 함에 기술적 과제를 두고 본 발명을 완성한 것이다.
Accordingly, the present inventors have completed the present invention with a technical problem in that waste polyurethane, such as buffing powder and cuttings, which have been discarded as a conventional waste, can be reduced and used as a liquid raw material at a low regeneration cost.
과제 해결수단으로 본 발명에서는 밀폐된 교반기에 폐 폴리우레탄과 용해제 및 중화제를 밀폐용기에 투입하여 25~35℃ 온도 하에서 20시간 교반한 후 교반 과정에서 화학반응에 의해 발생한 가스를 밀폐용기에 탈포기를 30~40분 서서히 배출하여 밀폐공기 내부 압력을 대기압으로 낮춘 상태에서 재생된 액상 폴리우레탄을 제조할 수 있게 하였다.
In the present invention, the waste polyurethane and the dissolving agent and neutralizing agent in a sealed stirrer in a sealed container and stirred for 20 hours at a temperature of 25 ~ 35 ℃ and degassing the gas generated by the chemical reaction during the stirring process in a sealed container Was slowly discharged for 30 to 40 minutes to prepare a recycled liquid polyurethane in a state in which the air pressure inside the closed air is lowered to atmospheric pressure.
본 발명에서 제공하는 폐 폴리우레탄 시트의 재생방법을 사용할 경우 폴리우레탄 시트를 제조 및 가공하거나 재단 사용함에 있어 대량으로 발생하는 버핑 가루와 재단 자투리를 폐기물 처리하지 않고 저 비용으로 재활용이 가능하고, 그로 인해 환경오염 예방 등을 개대할 수 있는 것이다.When using the recycling method of the waste polyurethane sheet provided by the present invention, it is possible to recycle the low-cost buffing powder and cutting edges generated in large quantities in manufacturing, processing or cutting the polyurethane sheet without waste treatment, and Therefore, environmental pollution prevention can be improved.
도 1은 본 발명 폐 폴리우레탄 시트의 재생방법에 따른 공정 블록도 1 is a process block diagram according to the recycling method of the waste polyurethane sheet of the present invention
이하에서 본 발명에서 제공하는 폐 폴리우레탄 시트의 재생방법을 설명한다.Hereinafter will be described a recycling method of the waste polyurethane sheet provided by the present invention.
도 1은 본 발명 폐 폴리우레탄 시트의 재생방법에 따른 공정 블록도를 도시한 것이다.Figure 1 shows a process block diagram according to the recycling method of the waste polyurethane sheet of the present invention.
본 발명의 폐 폴리우레탄 시트의 재생방법은 재료투입, 교반, 탈포, 배출의 순서로 작업이 이루어지는 것으로 각 단계별로 설명한다.Recycling method of the waste polyurethane sheet of the present invention will be described in each step as the operation is performed in the order of material input, stirring, defoaming, discharge.
1)재료투입1) Material input
폴리우레탄 시트를 제조 및 가공하거나 재단 사용함에 있어 대량으로 발생하는 버핑 가루와 재단 자투리인 폐 폴리우레탄과 용해제 및 중화제를 밀폐용기에 투입한다. In manufacturing, processing or cutting the polyurethane sheet, a large amount of buffing powder and cutting edges, waste polyurethane, dissolving agent, and neutralizing agent are put into a closed container.
이들의 투입비율은 중량비로 폐 폴리우레탄25%에 용해제75%를 투입한 상태에서 중화제를 폐 폴리우레탄과 용해제의 전체중량 대비 0.5~1%첨가하면 된다.These input ratios may be added by adding 0.5 to 1% of the neutralizing agent to the total weight of the waste polyurethane and the solvent in a state in which 75% of the solvent is added to 25% of the waste polyurethane by weight.
상기 폐 폴리우레탄은 여러 가지 색상이 혼합될 경우 제품성이 없으므로 버핑 가루와 재단 자투리에 이색이 혼합되는 것을 철저히 차단 관리해야 한다.Since the waste polyurethane is not productive when various colors are mixed, it is necessary to thoroughly block the mixing of the dichroic into the buffing powder and the cutting edge.
상기 폐 폴리우레탄은 여러 가지 색상이 혼합될 경우 제품성이 없으므로 버핑 가루와 재단 자투리에 이색이 혼합되는 것을 철저히 차단 관리해야 한다.Since the waste polyurethane is not productive when various colors are mixed, it is necessary to thoroughly block the mixing of the dichroic into the buffing powder and the cutting edge.
상기 용해제는 폐 폴리우레탄을 용해시키는 화학작용을 하는 것으로 DMF(디메틸포름아마이드(dimethylformamide))를 사용한다. 그리고 상기 중화제는 폐 폴리우레탄과 용해제가 용액화 될 때 묽은 용액 속에서 계면에 흡착하여 그 표면장력을 감소시키는 역할을 하는 계면활성제를 사용토록 한다. The solubilizer uses DMF (dimethylformamide) to chemically dissolve waste polyurethane. And the neutralizing agent is to use a surfactant that serves to reduce the surface tension by adsorbing to the interface in a dilute solution when the waste polyurethane and the solubilizer is liquefied.
2)교반2) stirring
상기한 비율로 폐 폴리우레탄과 용해제 및 중화제를 밀폐용기에 투입한 상태에서 밀폐용기 내에서 교반기를 이용하여 교반 작업을 행한다.The agitating operation is carried out using a stirrer in a sealed container in a state in which waste polyurethane, a dissolving agent and a neutralizing agent are put in a closed container at the above ratio.
교반 작업은 18~22시간 연속적으로 행하며, 바람직하기로는 20시간이 적당하다.Stirring operation is performed continuously for 18 to 22 hours, preferably 20 hours is preferable.
18시간 이하에서는 폐 폴리우레탄이 완전하게 용해되지 않는 문제점이 있다.There is a problem that the waste polyurethane is not completely dissolved in 18 hours or less.
또한 상기 교반 작업시 밀폐용기의 내부온도는 25~35℃ 온도 하에서 이루어진다.In addition, the internal temperature of the sealed vessel during the stirring operation is made under a temperature of 25 ~ 35 ℃.
25℃ 이하에서는 용해성이 떨어지고, 35℃ 이상에서는 과도한 가스가 발생되어 밀폐용기 내부 압력이 높아지는 등의 위험성이 있다.The solubility is inferior to 25 degrees C or less, and there exists a danger that excessive gas may generate | occur | produce in 35 degreeC or more and the pressure inside an airtight container will become high.
3)탈포3) Defoaming
상기와 같이 재료투입과 교반 작업을 행한 상태에서 밀폐용기의 내부 압력을 대기압으로 낮추고 아울러 교반 과정에서 발생한 가스를 가스처리장치(도시되지 않음)로 배출하는 탈포작업을 행하는데, 이때 재생된 폴리우레탄 용액에 존재하는 기포들이 제거된다.While degassing the material and stirring work as described above, the internal pressure of the sealed container is lowered to atmospheric pressure, and the degassing work is performed to discharge the gas generated during the stirring process to a gas treatment device (not shown), wherein the recycled polyurethane Bubbles present in the solution are removed.
4) 배출4) exhaust
상기와 같은 탈포작업이 끝난 후 밀폐용기에서 재생된 폴리우레탄 용액을 취출한다.After the defoaming operation as described above, the regenerated polyurethane solution is taken out from the sealed container.
재생된 폴리우레탄 용액은 단독으로 사용하거나 또는 원재료에 혼합하여 사용하면 된다.The recycled polyurethane solution may be used alone or mixed with raw materials.
이상에서 살펴본 바와 같이 본 발명은 간단한 제조장법을 통해서 폐 폴리우레탄을 액상의 재생원료로 제조할 수 있는 것이다.As described above, the present invention can produce waste polyurethane as a liquid recycled material through a simple manufacturing process.
본 발명의 상세한 설명에서는 구체적인 실시예에 관해 설명하고 있으나, 본 발명의 범주에서 벗어나지 않는 한도 내에서 다양한 변형이 가능함은 물론이다. 그러므로 본 발명의 보호 범위는 설명된 실시예에 국한되어 정해져서는 안 되며, 후술하는 청구범위 뿐만 아니라 균등한 것들에 의해 정해져야 한다.In the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the protection scope of the present invention should not be limited to the described embodiments, but should be defined by equivalents as well as the following claims.
Claims (1)
밀폐용기에 중량비로 폐 폴리우레탄25%에 용해제로 DMF(dimethylformamide)75%를 투입한 상태에서 폐 폴리우레탄과 용해제의 전체중량의 0.5~1%에 해당하도록 중화제로 계면활성제를 투입한 상태에서, 25~35℃ 온도 하에서 18~22시간 연속적 교반한 후 밀폐용기의 내부 압력을 대기압으로 낮추고 교반 과정에서 발생한 가스를 액상에서 분리 배출하는 탈포작업을 행하는 것을 특징으로 하는 폐 폴리우레탄 시트의 재생방법.In the recycling method of the waste polyurethane sheet, which is a buffing powder and cutting edge generated in large quantities in manufacturing, processing or cutting the polyurethane sheet,
In a state in which a surfactant is added as a neutralizing agent so as to correspond to 0.5-1% of the total weight of the waste polyurethane and the solvent, with 25% of the waste polyurethane and 75% of the DMF (dimethylformamide) as the solvent. 18-22 hours of continuous stirring at a temperature of 25 ~ 35 ℃ after the internal pressure of the closed vessel to the atmospheric pressure and the degassing process for separating and discharging the gas generated in the stirring process in the liquid phase, characterized in that for performing.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112280095A (en) * | 2020-10-26 | 2021-01-29 | 河北工程大学 | Method for recycling waste polyurethane |
| KR102718020B1 (en) | 2023-11-23 | 2024-10-16 | 주식회사 백산 | How to recycle polyurethane artificial leather |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005042135A2 (en) | 2003-10-30 | 2005-05-12 | Robert Donald Villwock | A method for recycling polyurethane and a composition comprising recycled polyurethane |
| KR20090089269A (en) * | 2008-02-18 | 2009-08-21 | 김종목 | Polyol Separation and Recovery Method from Polyurethane Waste |
| KR20100094142A (en) * | 2009-02-18 | 2010-08-26 | 김대환 | Method for producing polyurethane foam using seperating and recovering polyol from decomposing polyurethane |
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|---|---|---|---|---|
| WO2005042135A2 (en) | 2003-10-30 | 2005-05-12 | Robert Donald Villwock | A method for recycling polyurethane and a composition comprising recycled polyurethane |
| KR20090089269A (en) * | 2008-02-18 | 2009-08-21 | 김종목 | Polyol Separation and Recovery Method from Polyurethane Waste |
| KR20100094142A (en) * | 2009-02-18 | 2010-08-26 | 김대환 | Method for producing polyurethane foam using seperating and recovering polyol from decomposing polyurethane |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112280095A (en) * | 2020-10-26 | 2021-01-29 | 河北工程大学 | Method for recycling waste polyurethane |
| KR102718020B1 (en) | 2023-11-23 | 2024-10-16 | 주식회사 백산 | How to recycle polyurethane artificial leather |
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