KR19980060270A - Recycling method of used car hard board - Google Patents
Recycling method of used car hard board Download PDFInfo
- Publication number
- KR19980060270A KR19980060270A KR1019960079627A KR19960079627A KR19980060270A KR 19980060270 A KR19980060270 A KR 19980060270A KR 1019960079627 A KR1019960079627 A KR 1019960079627A KR 19960079627 A KR19960079627 A KR 19960079627A KR 19980060270 A KR19980060270 A KR 19980060270A
- Authority
- KR
- South Korea
- Prior art keywords
- hard board
- binder
- powder
- parts
- waste
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000004064 recycling Methods 0.000 title claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 18
- 239000002699 waste material Substances 0.000 claims abstract description 17
- 239000011230 binding agent Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 13
- 238000000465 moulding Methods 0.000 abstract description 8
- 238000005452 bending Methods 0.000 abstract description 6
- 238000000151 deposition Methods 0.000 abstract description 5
- 230000001172 regenerating effect Effects 0.000 abstract description 5
- 238000011049 filling Methods 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 239000006260 foam Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- 229920002472 Starch Polymers 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000003953 foreskin Anatomy 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
- 229920002397 thermoplastic olefin Polymers 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
-
- 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
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
-
- 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
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B2017/0424—Specific disintegrating techniques; devices therefor
- B29B2017/044—Knives
-
- 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
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
- B29B2017/0424—Specific disintegrating techniques; devices therefor
- B29B2017/0468—Crushing, i.e. disintegrating into small particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
-
- 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
Abstract
본 발명은 자동차 폐하드보드의 재생방법에 관한 것으로서, 더욱 상세하게는 폐하드보드(hard board)를 햄머-밀(hammer-mill) 분쇄기에서 분쇄하고 고속분말분쇄기를 통해 분말화한 후 물이 담겨진 용기에 결합체와 함께 첨가하여 침적시킨 다음 금형내에 충전시켜 압축성형함으로써 재생재료를 굴곡성형이 요구되는 복잡한 구조를 도어트림재로 사용할 수 있어 재생효율을 향상시키고 원가를 절감할 수 있는 자동차 폐하드보드의 재생방법에 관한 것이다.The present invention relates to a method for regenerating automobile waste hard board, and more particularly, the waste hard board is pulverized in a hammer-mill grinder and powdered through a high speed powder grinder to contain water. By adding the binder to the container and depositing it, then filling it in the mold and compressing it, the complex structure requiring the bending molding of the recycled material can be used as the door trim material, thereby improving the recycling efficiency and reducing the cost It relates to a method of reproducing.
Description
본 발명은 자동차 폐하드보드의 재생방법에 관한 것으로서, 더욱 상세하게는 폐하드보드(hard board)를 햄머-밀(hammer-mill) 분쇄기에서 분쇄하고 고속분말분쇄기를 통해 분말화한 후 물이 담겨진 용기에 결합제와 함께 첨가하여 침적시킨 다음 금형내에 충전시켜 압축성형함으로써 재생재료를 굴곡성형이 요구되는 복잡한 구조의 도어트림재로 사용할 수 있어 재생효율을 향상시키고 원가를 절감할 수 있는 자동차 폐하드보드의 재생방법에 관한 것이다.The present invention relates to a method for regenerating automobile waste hard board, and more particularly, the waste hard board is pulverized in a hammer-mill grinder and powdered through a high speed powder grinder to contain water. By adding the binder to the container and depositing it, then filling it into a mold and compressing it, the recycled material can be used as a door trim material with a complex structure requiring bending molding, thereby improving regeneration efficiency and reducing costs. It relates to a method of reproducing.
자동차의 도어트림(door trim)은 내장재중에서도 그 구성요소가 다양하고 형상이 매우 복잡한 부품으로서 실내를 고급스럽게 하고, 탑승자에게 편의성을 부여해주는 매우 중요한 부품이다.The door trim of a car is a very important part that makes the interior of the interior high quality and provides convenience to the occupant, with its components varying in shape and very complex among interior materials.
현재 도어트림은 포피, 폼 및 기재의 3층으로 구성되어 있으며, 표피로는 폴리염화비닐, 열가소성 폴리올레핀수지가 주로 사용되며, 폼으로는 폴리우레탄, 폴리프로필렌 또는 폴리에틸렌 폼이 사용되고, 그리고 기재로는 하드보드, 수지 펠트(resin felt), 우드스톡(wood stock), 폴리프로필렌 등이 사용되고 있다.Currently, the door trim is composed of three layers of foreskin, foam, and substrate, and polyvinyl chloride and thermoplastic polyolefin resin are mainly used as the skin, and polyurethane, polypropylene or polyethylene foam is used as the foam, and as the substrate, Hard boards, resin felt, wood stock, polypropylene, and the like are used.
통상적으로 도어트림은 가공시 표피, 폼을 미리 접착시킨 것과 기재의 압착을 통해 성형·접착시키며, 성형시 스크랩의 발생이 많다. 그리고, 3층의 적층재료로 구성되어 있어 성형후 표피, 폼을 분리하지만 기재자체가 재생이 곤란하여 거의 소각처리하고 있다.In general, the door trim is molded and adhered by pre-adhesion of the skin and foam during processing and pressing of the substrate, and a lot of scrap occurs during molding. It is composed of three layers of laminated materials, and the skin and foam are separated after molding, but the substrate itself is difficult to regenerate and is almost incinerated.
이와같이 재생의 곤란 때문에 최근 일체성형 형태의 도어트림을 제작하기도 하지만, 아직까지는 대부분의 차량에 하드보드 또는 수지펠트를 기재로 하는 도어트림을 대부분 사용하고 있다. 이중 하드보드는 트럭, 승합차 등 저급차종에 대부분 채택되고 있으며, 가격이 저렴하고 후변형이 없는 장점으로 인해 많이 사용되고 있다. 그러나, 하드보드는 굴곡성형이 불리한 단점이 있다.Due to the difficulty of reproducing, in recent years, door trims of the integral type have been manufactured, but most of the door trims based on hard boards or resin felts are still used in most vehicles. Dual boards are mostly used in low-end models such as trucks and vans, and are widely used due to their low price and no post deformation. However, hard boards have disadvantages in that bending molding is disadvantageous.
현재 우리나라에서 하드보드의 폐기물 발생량은 연간 1,300톤 정도이며, 전량 소각하고 있다.Currently, the amount of hard board waste generated in Korea is about 1,300 tons per year, and all of it is incinerated.
이와같은 문제로 선진국에서는 하드보드의 재활용기술 개발에 많은 연구를 행하고 있지만, 구체적으로 적용된 예는 없다.Due to this problem, developed countries are doing a lot of research on the development of recycling technology of hard board, but there is no specific application.
본 발명은 상기와 같이 차량의 도어트림재의 기재를 구성하는 하드보드 재생의 문제점을 해결하기 위하여 하드보드를 햄머-밀 분쇄기를 이용하여 분쇄하고 고속분말분쇄하여 분말화한 후, 이를 수중에 결합제와 함께 첨가하여 침적시키고 압축성형함으로써 재생재료를 굴곡성형이 요구되는 복잡한 구조의 자동차 도어트림재로 적용할 수 있도록 한 하드보드의 재생방법을 제공하는 데 그 목적이 있다.The present invention, in order to solve the problem of regenerating the hard board constituting the base material of the door trim material of the vehicle as described above, after grinding the hard board using a hammer-mill grinder, and powdered by high-speed powder grinding, it is then combined with a binder in water The purpose of the present invention is to provide a method for regenerating a hard board, which can be applied to a car door trim material having a complicated structure requiring bending by adding and depositing it together with compression molding.
본 발명은 자동차 폐하드보드를 햄머-밀 분쇄기에서 10∼15mm 크기로 분쇄한 다음, 고속분말분쇄기에서 분말화하고, 분말을 수중에 결합제와 함께 침적시킨 후 압축성형하는 자동차 폐하드보드의 재생방법에 그 특징이 있다.The present invention is a method for recycling automobile waste hard boards, which are ground to a size of 10 to 15 mm in a hammer mill mill, and then powdered in a high-speed powder mill, and the powder is deposited with a binder in water and then compression molded. Has its features.
이와같은 본 발명을 더욱 상세하게 설명하면 다음과 같다.The present invention will be described in more detail as follows.
하드보드는 목분을 종이와 같은 박막의 시트를 수십개의 층을 적층시켜 그층 사이에 페놀 수지와 같은 열경화성 수지를 함침시켜 가열가압하여 보드 형태로 만든 재료이다.Hard board is a material made of wood board in the form of board by laminating dozens of layers of thin sheets of paper such as paper and impregnating thermosetting resin such as phenolic resin between the layers.
이와같은 폐하드보드를 재생하기 위해 우선 햄머-밀 분쇄기에서 10∼15mm 크기로 분쇄한다. 만일, 분쇄크기가 15mm보다 크면 고속분말분쇄기에서 분말화수율이 떨어지고, 특히 하드보드내의 열경화성 수지의 크기감소 및 효과적인 라디칼 및 반응기 생성이 이루어지지 않아 최종제품 성형시 굴곡성형은 물론 부품으로서의 충분한 물성을 기대하기 어렵다. 또한, 고속분말분쇄길에서 분말화가 잘 되지 않아 큰 분쇄물이 토출되어 상품성이 떨어지고, 원료투입구가 막혀 원활한 재료공급이 이루어지지 않아 생산성이 저하된다.In order to regenerate such a waste hard board, it is first ground in a hammer mill mill to a size of 10 to 15 mm. If the crushing size is larger than 15mm, the powdering yield falls in the high-speed powder grinder, and in particular, the size of the thermosetting resin in the hard board and the effective radical and reactor generation are not achieved. It's hard to expect In addition, the powder is not well powdered in the high-speed powder grinding road, the large pulverized product is discharged, the commercial property is reduced, the raw material inlet is blocked, the smooth material supply is not achieved, the productivity is reduced.
그 다음 분쇄물을 고속분말분쇄기에서 분말화하는데, 이때 모터회전수에 따라 폐하드보드 분말의 수율이 결정되는 바 본 발명에서는 1,500∼2,000rpm으로 한다. 이때, 교반속도가 1,500rpm 미만이면 열경화성 수지로 굳어진 하드보드를 효과적으로 분말화할 수 없으며 커터(cutter)가 빨리 손상된다. 한편, 교반속도가 2,000rpm을 초과하는 경우 잔존하는 열경화성 수지가 고속회전에 의한 과다한 마찰열로 탄화현상이 발생하여 재생재료 제조시 이 탄재(char)가 심각한 물성취 약점(crack point)로 작용하게 된다.Then, the pulverized powder is powdered in a high speed powder grinder, in which the yield of the waste hard board powder is determined according to the number of motor revolutions. In the present invention, 1,500 to 2,000 rpm is used. At this time, if the stirring speed is less than 1,500rpm, the hard board hardened by the thermosetting resin cannot be effectively powdered and the cutter is quickly damaged. On the other hand, when the stirring speed exceeds 2,000rpm, the remaining thermosetting resin is carbonized due to excessive frictional heat due to high speed rotation, and this char acts as a serious crack point in the production of recycled materials. .
이와같이 분말화된 하드보드에 결합제를 첨가하는 데, 결합제의 종류와 투입량은 용도에 따라 달라질 수 있다. 그런데, 통상적으로 굴곡성형이 가능하도록 하기 위해서는 결합제로서 아교나 녹분과 같은 종류의 것을 사용하는 것이 바람직하며, 보다 바람직하기로는 녹분을 사용하는 것이다. 이는 녹분에 다량 함유된 관능성기로 인한 강력한 수소결합과 녹분 자체가 가지고 있는 분자구조적인 잇점으로 굴곡성형에 더욱 유리하기 때문이다.To add a binder to the powdered hard board, the type and amount of the binder may vary depending on the application. By the way, in order to bend shape | molding possible normally, it is preferable to use the kind of glue | gum and a starch as a binder, More preferably, it uses rust. This is because the strong hydrogen bonds due to the functional groups contained in the starch powder and the molecular structural advantages of the starch itself are more favorable for bending molding.
이때, 첨가되는 결합제의 사용량은 폐하드보드 분말에 대하여 5∼15 중량부인 것이 바람직하다.In this case, the amount of the binder to be added is preferably 5 to 15 parts by weight based on the waste hard board powder.
분쇄된 하드보드와 결합제를 물에 침적시키는데, 이때 물의 양은 침적되는 하드보드와 결합제의 양에 대하여 120∼140 중량부인 것이 바람직하다. 만일, 물의 사용량이 120 중량부 미만이면 투입되는 하드보드와 결합제에 충분히 수분공급이 이루어지지 않게 되며, 140 중량부를 초과하는 경우 결합제가 과다하게 희석되어 원료손실은 물론 물성, 특히 강성의 감소가 현저하다. 침적시간은 5∼8분이 적당하지만, 교반기를 사용하여 5분 미만으로 단축시킬 수도 있다.The crushed hard board and the binder are immersed in water, wherein the amount of water is preferably 120 to 140 parts by weight based on the amount of the hard board and the binder to be deposited. If the amount of water used is less than 120 parts by weight, the water is not sufficiently supplied to the hard board and the binder. If the amount is more than 140 parts by weight, the binder is excessively diluted, resulting in a significant loss of material properties, particularly stiffness. Do. Although 5-8 minutes are suitable for immersion time, it can also be shortened to less than 5 minutes using a stirrer.
이와같이 침적된 하드보드와 결합제를 성형될 금형내에 충전시키고 압축성형을 하는데, 이때 금형내의 온도를 90∼95℃로 유지시키고 잔류시간을 25∼35초로 하는 것이 바람직하다.The hard board and the binder thus deposited are filled in a mold to be molded and compression molded, whereby the temperature in the mold is maintained at 90 to 95 ° C. and the residence time is preferably 25 to 35 seconds.
이와같이 제조된 재생재료는 굴곡성형이 가능하여 복잡한 형상의 자동차 도어트림에 유용하게 사용될 수 있다.The recycled material prepared as described above can be flexibly molded and can be usefully used for automobile door trims having a complicated shape.
이하, 본 발명을 실시예에 의거하여 상세히 설명하면 다음과 같은 바, 본 발명이 실시예에 의해 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail with reference to the following Examples, but the present invention is not limited by the Examples.
실시예Example
실시예 1Example 1
폐하드보드를 햄머-밀 분쇄기에서 10∼12mm 크기로 분쇄하고, 1,700∼1,750rpm의 고속분말분쇄기에서 분말화한 후 녹분이 주성분인 수용성접착제를 상기 폐하드보드 100 중량부에 대하여 15 중량부를 첨가하여 잘 혼합한 다음, 물 140 중량부를 혼합물에 첨가하고 교반기로 4분간 혼합한 다음, 제품금형내에 충전시켜 150톤의 압력하에 금형온도 90℃, 잔류시간 28초 동안 가압하여 재생제품을 성형하였다.The waste hard board is pulverized in a hammer mill mill to a size of 10 to 12 mm, and powdered in a high speed powder mill at 1,700 to 1,750 rpm, and 15 parts by weight of a water-soluble adhesive having a main component of rust is added to 100 parts by weight of the waste hard board. After mixing well, 140 parts by weight of water was added to the mixture, and mixed with a stirrer for 4 minutes. Then, the product was filled into a mold and pressurized under a pressure of 150 tons at a mold temperature of 90 ° C. and a residual time of 28 seconds to form a recycled product.
비교예 1Comparative Example 1
상기 실시예 1에서와 동일한 방법으로 제품을 성형하되, 다만 수용성 접착제를 폐하드보드 100 중량부에 대하여 5 중량부 첨가하였다.The product was molded in the same manner as in Example 1 except that 5 parts by weight of a water-soluble adhesive was added based on 100 parts by weight of the waste hard board.
비교예 2Comparative Example 2
상기 실시예 1에서와 동일한 방법으로 제품을 성형하되, 다만 침적시 물의 양을 폐하드보드 100 중량부에 대하여 100 중량부로 하였다.The product was molded in the same manner as in Example 1 except that the amount of water during deposition was 100 parts by weight based on 100 parts by weight of the waste hard board.
비교예 3Comparative Example 3
상기 실시예 1에서와 동일한 방법으로 제품을 성형하되, 다만 침적시 교반하지 않고 4분 동안 침적시켰다.The product was molded in the same manner as in Example 1 except that it was deposited for 4 minutes without stirring during deposition.
상기 실시예 1 및 비교예 1∼3에 따라 제조된 성형제품에 대하여 두께, 외관, 낙구충격강도, 내환경성, 열노화성 및 연소성을 측정하였으며, 그 결과를 다음 표 1에 나타내었다.For the molded products prepared according to Example 1 and Comparative Examples 1 to 3, the thickness, appearance, falling impact strength, environmental resistance, thermal aging and burnability were measured, and the results are shown in Table 1 below.
[표 1] TABLE 1
본 발명에 따라 재생된 시트는 자동차용 부품, 특히 굴곡성형이 요구되는 도어트림재로 사용이 가능하며, 전량 폐기, 소각되고 있는 폐하드보드를 재생하므로써 재생효율을 높이고 원가를 절감할 수 있다.The sheet recycled according to the present invention can be used as a door trim member for automobile parts, in particular, bending molding is required, it is possible to increase the regeneration efficiency and reduce the cost by regenerating the waste hard board that is discarded, incinerated entirely.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960079627A KR19980060270A (en) | 1996-12-31 | 1996-12-31 | Recycling method of used car hard board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960079627A KR19980060270A (en) | 1996-12-31 | 1996-12-31 | Recycling method of used car hard board |
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| Publication Number | Publication Date |
|---|---|
| KR19980060270A true KR19980060270A (en) | 1998-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960079627A KR19980060270A (en) | 1996-12-31 | 1996-12-31 | Recycling method of used car hard board |
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| Country | Link |
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| KR (1) | KR19980060270A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100610588B1 (en) * | 2004-02-27 | 2006-08-09 | 박일홍 | Environmental-Affinitive and Aroma Sustained-Release Type Wall Structures and Fabricating Methods for Inside Wall of Building There of |
-
1996
- 1996-12-31 KR KR1019960079627A patent/KR19980060270A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100610588B1 (en) * | 2004-02-27 | 2006-08-09 | 박일홍 | Environmental-Affinitive and Aroma Sustained-Release Type Wall Structures and Fabricating Methods for Inside Wall of Building There of |
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