JP2516858B2 - Coating film peeling separation collection method for polypropylene resin molded products - Google Patents
Coating film peeling separation collection method for polypropylene resin molded productsInfo
- Publication number
- JP2516858B2 JP2516858B2 JP27357491A JP27357491A JP2516858B2 JP 2516858 B2 JP2516858 B2 JP 2516858B2 JP 27357491 A JP27357491 A JP 27357491A JP 27357491 A JP27357491 A JP 27357491A JP 2516858 B2 JP2516858 B2 JP 2516858B2
- Authority
- JP
- Japan
- Prior art keywords
- coating film
- resin molded
- coating
- molded products
- polypropylene resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000011248 coating agent Substances 0.000 title claims description 27
- 238000000576 coating method Methods 0.000 title claims description 27
- 229920005989 resin Polymers 0.000 title claims description 12
- 239000011347 resin Substances 0.000 title claims description 12
- 238000000034 method Methods 0.000 title claims description 10
- -1 polypropylene Polymers 0.000 title claims description 8
- 239000004743 Polypropylene Substances 0.000 title claims description 7
- 229920001155 polypropylene Polymers 0.000 title claims description 7
- 238000000926 separation method Methods 0.000 title description 2
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000007667 floating Methods 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 230000008961 swelling Effects 0.000 claims description 2
- 238000009775 high-speed stirring Methods 0.000 claims 1
- 239000002904 solvent Substances 0.000 description 12
- 239000000758 substrate Substances 0.000 description 5
- 230000005484 gravity Effects 0.000 description 3
- 239000004709 Chlorinated polyethylene Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- 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
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- 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
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Description
【０００１】この発明は、自動車バンパー等塗装が施さ
れているポリプロピレン成型品を再利用するため、該塗
膜を剥離し且つ剥離した塗膜片を自動的に分離して樹脂
基材を再生用原料として回収できる塗膜剥離自動分離回
収法に関する。The present invention reuses a coated polypropylene molded article such as an automobile bumper. Therefore, the coating film is peeled off and the peeled coating film piece is automatically separated to regenerate the resin substrate. The present invention relates to a coating film peeling automatic separation and collection method that can be collected as a raw material.
【０００２】[0002]
【従来技術】合成樹脂基材表面の付着物を除去する方法
として、フロンを主溶剤とし塩化メチレンを副溶剤とし
た混合液に浸漬する方法（特開昭５８−６５６２５）、
或は樹脂基材に接着された金属膜等を剥離する方法とし
て塩化メチレンの乳化液中に浸漬する方法（特開昭５８
−６２０１４）が知られているが、前者は単なる表面洗
浄であり、後者は一部剥離したものをその後に分離する
作業が必要である他、界面活性剤を用いるので再生樹脂
原料として好ましくない。自動車用バンパー等ポリプロ
ピレン成型品に施されている塗膜は、強力なプライマー
を介して塗装されているため塗膜を剥離除去することが
困難であって、再生利用可能な高純度樹脂基材を得るこ
とができなかった。2. Description of the Related Art As a method for removing the deposits on the surface of a synthetic resin substrate, a method of immersing it in a mixed solution containing CFC as a main solvent and methylene chloride as an auxiliary solvent (JP-A-58-65625),
Alternatively, as a method for peeling off a metal film or the like adhered to a resin substrate, a method of immersing it in an emulsion of methylene chloride (Japanese Patent Laid-Open No. 58-58)
No. 62014) is known, the former is merely surface cleaning, and the latter is not preferable as a recycled resin raw material because it requires a work of separating a partially peeled one after that and a surfactant is used. The coating applied to polypropylene molded products such as automobile bumpers is difficult to peel off because it is coated with a strong primer, and a recyclable high-purity resin substrate is used. I couldn't get it.
【０００３】[0003]
【解決しようとする問題点】ポリプロピレン樹脂の大型
成型品である自動車バンパーは、成型体の表面に塩素化
ポリエチレン系プライマを介してウレタン系塗料が塗装
されている。従って、廃車バンパーを粗粉砕して上記公
知の技術を適用しても高純度再生原料を経済的に得るこ
とはできない。本発明は、粗粉砕物に付着している塗膜
を溶液中で剥離し、更に比重差を利用して基材（Ｓｐｇ
＝０．９１８〜０．９２）と剥離塗膜（Ｓｐｇ＝１．５
〜１．８）を自動的に液中分離することによって基材の
回収を容易に行なえる方法を提供するものである。[Problems to be Solved] An automobile bumper, which is a large-sized molded product of polypropylene resin, has a urethane-based paint applied on the surface of a molded product through a chlorinated polyethylene-based primer. Therefore, even if the scrap car bumper is roughly crushed and the above-mentioned known technique is applied, a high-purity recycled material cannot be economically obtained. The present invention peels a coating film adhering to a coarsely pulverized product in a solution, and further utilizes the difference in specific gravity to make a base material (Spg
= 0.918-0.92) and a release coating (Spg = 1.5
The present invention provides a method for easily recovering a substrate by automatically separating (1) to (1.8) in a liquid.
【０００４】[0004]
【解決手段】本発明において塩素化ポリエチレン系プラ
イマの溶剤又は膨潤剤として塩素化炭化水素、特に塩化
メチレンが有効である。また、処理過程で塩化メチレン
が気散するのを減少又は防止する目的で少量の水を共存
させておくのが有効である。In the present invention, a chlorinated hydrocarbon, particularly methylene chloride, is effective as a solvent or a swelling agent for a chlorinated polyethylene-based primer. Further, it is effective to make a small amount of water coexist for the purpose of reducing or preventing methylene chloride from being vaporized during the treatment process.
【０００５】更に、プライマの浸触と剥離を促進するた
め溶剤の沸点に達しない温度まで加熱すると共に機械的
な撹拌が必要である。従って本発明において使用する容
器は、撹拌機を投入でき又は固定的に備えたジャケット
付溶解槽とする。この容器内において、溶剤層の上面
は、水の気散防止層で覆われる。粗粉砕された塗膜付原
料は、この状態で投入されてもよいが、原料中に溶剤と
水を順次注加してもよい。Furthermore, in order to promote the contact and peeling of the primer, it is necessary to heat the solvent to a temperature below the boiling point of the solvent and mechanically stir it. Therefore, the container used in the present invention is a jacketed dissolution vessel into which a stirrer can be charged or which is fixedly provided. In this container, the upper surface of the solvent layer is covered with a water vapor diffusion preventing layer. The roughly crushed raw material with a coating film may be charged in this state, but a solvent and water may be sequentially added to the raw material.
【０００６】即ち、本発明は撹拌翼を備えた容器中に塗
膜付ポリプロピレン樹脂成型品を粗粉砕した塗膜付粉砕
原料と水及び塩化メチレンを投入して約４０℃に加熱す
ると共に高速撹拌下で塗装プライマを溶解又は膨潤させ
て塗膜を剥離した後、撹拌を停止して剥離した塗膜を容
器底部に沈降させると共に樹脂基材を上部水層に浮遊さ
せて回収することを特徴とするものである。That is, in the present invention, a pulverized raw material with a coating obtained by roughly pulverizing a polypropylene resin molded article with a coating, water and methylene chloride are put into a container equipped with a stirring blade, heated to about 40 ° C. and stirred at a high speed. After the coating primer is dissolved or swollen below to peel off the coating film, stirring is stopped, the peeled coating film is allowed to settle at the bottom of the container, and the resin base material is floated in the upper water layer for recovery. To do.
【０００７】[0007]
【実施例】クラッシャによって適当な大きさ（例えば
０．５ｃｍ3 以下）及び形状に粗粉砕された原料３０ｋ
ｇを容器１内に投入し、塩化メチレン（Ｓｐｇ＝１．３
８、沸点４０．２℃）１００Ｌ、水１０Ｌを注加した。
蓋２をした状態でジャケットに温水を供給し４０℃に加
熱し、撹拌機３の速度を５００ｒ．ｐ．ｍ．として１時
間撹拌した。この撹拌によって粉砕片表面に付着してい
る水溶性物質は水に溶解し、油分等は溶剤中に移行する
と共に塗装プライマーは膨潤して塗膜片が剥離する。そ
の後加熱を停止して、２０ｒ．ｐ．ｍ．として更に１０
分間撹拌してから撹拌を停止して放置した。３０分後、
液層は最初の二層状態となると共に比重が塩化メチレン
より大きい塗膜片６（白色塗膜Ｓｐｇ＝１．５〜１．
８）が容器底部４に沈降した。溶剤層の上層及び水層に
は塗膜が除去された基材（Ｓｐｇ＝０．９１８〜０．９
２）が浮遊する。[Example] A raw material 30k roughly crushed by a crusher into an appropriate size (for example, 0.5 cm 3 or less) and shape
g into the container 1, and methylene chloride (Spg = 1.3
(8, boiling point 40.2 ° C.) 100 L, and water 10 L were added.
With the lid 2 on, warm water is supplied to the jacket to heat it to 40 ° C., and the speed of the stirrer 3 is set to 500 r. p. m. Was stirred for 1 hour. By this agitation, the water-soluble substance adhering to the surface of the crushed pieces is dissolved in water, the oil and the like are transferred into the solvent, and the coating primer is swollen and the coating pieces are peeled. After that, the heating is stopped, and 20 r. p. m. As 10
After stirring for a minute, the stirring was stopped and allowed to stand. 30 minutes later
The liquid layer becomes the first two-layer state and the specific gravity of the coating film piece 6 is larger than that of methylene chloride (white coating film Spg = 1.5 to 1.
8) settled on the bottom 4 of the container. The base material (Spg = 0.918 to 0.918) from which the coating film has been removed is formed on the upper layer and the water layer of the solvent layer.
2) floats.
【０００８】浮遊基材の回収はスクイ取りの他、水を注
入してオーバフローさせることによって容易にでき、回
収物は水分乾燥後直ちに再生原料として使用可能であ
る。沈降塗膜片は排出弁５を開き塩化メチレンの一部又
は全部と共に適当な受器に収容し、後に濾別する。塗膜
片の乾燥重量は約１３５ｇであった。（除去率約９２
％）なお、処理時間により最高９５％まで除去可能であ
る。塩化メチレンは反覆使用できること勿論である。The recovery of the floating base material can be easily carried out by pouring water and overflowing in addition to removing the squeeze, and the recovered material can be used as a recycled raw material immediately after drying the water content. The sedimented coating film piece is placed in an appropriate receiver together with a part or all of methylene chloride by opening the discharge valve 5 and then filtered. The dry weight of the coating film piece was about 135 g. (Removal rate about 92
%) It is possible to remove up to 95% depending on the treatment time. Of course, methylene chloride can be used again.
【０００９】[0009]
【効果】本発明は、基材樹脂及び塗装膜をこれらの比重
差を利用して溶液中で自動分離して夫々簡単に回収でき
る他、回収片は水及び溶剤によって洗浄されているので
そのまま再生原料とすることができる。更に溶剤の上面
が水の層によって覆われているから溶剤の気散が少なく
済む利点もある。[Effect] According to the present invention, the base resin and the coating film can be easily separated by automatically separating them in the solution by utilizing the difference in specific gravity between them, and the collected pieces are washed with water and a solvent, so that they can be regenerated as they are. It can be a raw material. Further, since the upper surface of the solvent is covered with the water layer, there is an advantage that the solvent is less likely to vaporize.
【図１】容器の断面図FIG. 1 is a sectional view of a container
３は撹拌機 ５は排出弁 ６は剥離塗膜片 3 is a stirrer 5 is a discharge valve 6 is a release coating piece
Claims (1)
ピレン樹脂成型品を粗粉砕した塗膜付粉砕原料と水及び
塩化メチレンを投入して約４０℃に加熱すると共に高速
撹拌下で塗装プライマを溶解又は膨潤させて塗膜を剥離
した後、撹拌を停止して前記剥離した塗膜を容器底部に
沈降させると共に樹脂基材を上部水層に浮遊状態として
回収することを特徴とするポリプロピレン樹脂成型品の
塗膜剥離分離回収法。1. A pulverized raw material with a coating, which is obtained by roughly pulverizing a polypropylene resin molded article with a coating, water and methylene chloride in a container equipped with a stirring blade, heated to about 40 ° C., and coated under high-speed stirring. A polypropylene characterized by dissolving or swelling a primer to peel off a coating film, stopping stirring, allowing the peeled coating film to settle to the bottom of the container, and collecting the resin base material in a floating state in the upper water layer. A method for separating and recovering coating film from resin molded products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27357491A JP2516858B2 (en) | 1991-09-26 | 1991-09-26 | Coating film peeling separation collection method for polypropylene resin molded products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27357491A JP2516858B2 (en) | 1991-09-26 | 1991-09-26 | Coating film peeling separation collection method for polypropylene resin molded products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0584746A JPH0584746A (en) | 1993-04-06 |
| JP2516858B2 true JP2516858B2 (en) | 1996-07-24 |
Family
ID=17529702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27357491A Expired - Fee Related JP2516858B2 (en) | 1991-09-26 | 1991-09-26 | Coating film peeling separation collection method for polypropylene resin molded products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2516858B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100336834B1 (en) | 1999-05-19 | 2002-05-16 | 주덕영 | Method and apparatus of removing paint film of plastic bumper for automobile |
| JP3806067B2 (en) | 2002-06-10 | 2006-08-09 | 富士通株式会社 | Method for removing coating film of coated magnesium alloy material and method for producing magnesium alloy recycled material |
| JP6832539B2 (en) * | 2017-03-10 | 2021-02-24 | 三菱マテリアル株式会社 | How to separate covered wires |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5862014A (en) * | 1981-10-09 | 1983-04-13 | Nobuhide Maeda | Method of separating resin part of automobile |
| JPS5865625A (en) * | 1981-10-16 | 1983-04-19 | Nobuhide Maeda | Method of removing impurity adhered to synthetic resin member |
-
1991
- 1991-09-26 JP JP27357491A patent/JP2516858B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0584746A (en) | 1993-04-06 |
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