JPH068245A - Recovering method for resin for recycling - Google Patents
Recovering method for resin for recyclingInfo
- Publication number
- JPH068245A JPH068245A JP16744392A JP16744392A JPH068245A JP H068245 A JPH068245 A JP H068245A JP 16744392 A JP16744392 A JP 16744392A JP 16744392 A JP16744392 A JP 16744392A JP H068245 A JPH068245 A JP H068245A
- Authority
- JP
- Japan
- Prior art keywords
- molded product
- resin
- resin molded
- screen
- product
- 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.)
- Granted
Links
- 229920005989 resin Polymers 0.000 title claims abstract description 49
- 239000011347 resin Substances 0.000 title claims abstract description 49
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 36
- 230000005484 gravity Effects 0.000 claims abstract description 10
- 239000002345 surface coating layer Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 abstract description 29
- 239000011248 coating agent Substances 0.000 abstract description 27
- -1 polyethylene Polymers 0.000 abstract description 8
- 238000000227 grinding Methods 0.000 abstract description 5
- 238000010422 painting Methods 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 5
- 239000004743 Polypropylene Substances 0.000 abstract description 4
- 229920001155 polypropylene Polymers 0.000 abstract description 4
- 238000007639 printing Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 4
- 239000004698 Polyethylene Substances 0.000 abstract description 3
- 229920000573 polyethylene Polymers 0.000 abstract description 3
- 230000000704 physical effect Effects 0.000 abstract description 2
- 238000004544 sputter deposition Methods 0.000 abstract description 2
- 238000007740 vapor deposition Methods 0.000 abstract description 2
- 230000008014 freezing Effects 0.000 abstract 1
- 238000007710 freezing Methods 0.000 abstract 1
- STJLVHWMYQXCPB-UHFFFAOYSA-N propiconazole Chemical compound O1C(CCC)COC1(C=1C(=CC(Cl)=CC=1)Cl)CN1N=CN=C1 STJLVHWMYQXCPB-UHFFFAOYSA-N 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 238000010298 pulverizing process Methods 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 238000007873 sieving Methods 0.000 description 4
- 239000011342 resin composition Substances 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000011088 calibration curve Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229920005676 ethylene-propylene block copolymer Polymers 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010332 dry classification Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- CMWTZPSULFXXJA-VIFPVBQESA-N naproxen Chemical compound C1=C([C@H](C)C(O)=O)C=CC2=CC(OC)=CC=C21 CMWTZPSULFXXJA-VIFPVBQESA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920001955 polyphenylene ether Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 210000003660 reticulum Anatomy 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000002699 waste material 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
- Processing Of Solid Wastes (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、塗装等の表面被覆加工
された樹脂成形品から樹脂を回収するリサイクル用樹脂
の回収方法に関するものである。さらに詳しくは、塗装
等により表面被覆加工された樹脂成形品から、塗膜等が
除去された、再成形（リサイクル）後の成形品の機械的
物性や外観をそこなうことのない優れたリサイクル用樹
脂の回収方法に関するものである。本発明の方法は塗装
されたもの以外に印刷されたもの、貼合されたものにも
利用できる。また、成形品としては、射出成形品、押出
成形品やその他の成形法による成形品に利用できる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recovering a resin for recycling, which recovers a resin from a resin molded product which has been surface-coated by painting or the like. More specifically, it is an excellent resin for recycling that does not damage the mechanical properties or appearance of the molded product after remolding (recycling), in which the coating film has been removed from the resin molded product that has been surface-coated by painting or the like. Regarding the collection method of. The method of the present invention can be applied to printed matter and pasted matter as well as painted matter. As the molded product, an injection molded product, an extrusion molded product, or a molded product produced by another molding method can be used.
【０００２】[0002]
【従来の技術】樹脂成形品は、表面保護と高級感、個性
化付与等の外観向上のため塗装、印刷、貼合などの表面
被覆加工がなされることが多い。特に、自動車部品にお
いては、塗装品が多く使用されている。一方、近年の地
球環境問題や資源保護の観点から、種々のリサイクル、
再使用が望まれいる。樹脂成形品の場合、特に、そのニ
ーズが大きい。ただ塗装されたり、被覆加工された樹脂
成形品は、通常、塗膜や、印刷インク、貼合品と樹脂と
の分離がきわめて困難であり、そのまま粉砕、造粒して
再使用さぜるを得ない。ところがこのような成形で再利
用すると、樹脂と相溶しない塗膜、インク等が樹脂中に
残存し、衝撃強度等の機械的物性が低下する問題が発生
する。さらにこれらの残存物が表面にブツとして現わ
れ、外観不良現象が発生する。それ故、この形式の再利
用には、用途的に非常に限定される。2. Description of the Related Art Resin molded products are often subjected to surface coating processing such as painting, printing, and laminating in order to improve the appearance such as surface protection, high-quality feeling, and individualization. In particular, painted parts are often used for automobile parts. On the other hand, from the viewpoint of recent global environmental problems and resource protection, various recycling,
Reuse is desired. In the case of a resin molded product, its needs are particularly great. However, it is usually very difficult to separate the resin from the coated or coated resin molded product, and it is extremely difficult to separate the resin from the coating film, printing ink, and the bonded product. I don't get it. However, when it is reused in such molding, a coating film, an ink or the like which is incompatible with the resin remains in the resin, which causes a problem that mechanical properties such as impact strength are deteriorated. Further, these residues appear as lumps on the surface, and a phenomenon of poor appearance occurs. Therefore, this type of reuse is very limited in application.
【０００３】この塗膜等を除去する方法として、塗膜等
を溶剤で溶かしたり、剥離し、分離する方法等が考えら
れるが、使用溶剤の精製、廃液処理等で経済性、環境面
で問題がある。また、粉砕後、押出機にて溶融させ、ダ
イスの手前でスクリーンにより塗膜等を除去する方法も
考えられる。この方法は、経済性では有利であるが、す
ぐにスクリーンが目づまりをおこし、ベントアップした
りスクリーンをむりやり塗膜等が通り抜けてしまう問題
がある。これらの従来の塗膜等の除去法の欠点を改良
し、経済性及び再使用品の性能の優れたものがえられる
除去法は、社会的に強く望まれている。As a method for removing the coating film or the like, a method of dissolving the coating film or the like with a solvent, peeling and separating the coating film can be considered, but it is economically and environmentally problematic in refining the solvent used, waste liquid treatment and the like. There is. Further, a method of melting after crushing with an extruder and removing the coating film or the like with a screen before the die is also considered. This method is economically advantageous, but there is a problem that the screen immediately becomes clogged, venting up or peeling the screen, and the coating film or the like passes through. There is a strong social demand for a removal method that improves the drawbacks of these conventional methods for removing coating films and the like, and that is economical and has excellent reusable product performance.
【０００４】[0004]
【発明が解決しようとする課題】かかる観点より、経済
的に有利な粉砕、溶融押出除去法を改良し、機械的物性
や外観の優れたものを得ることは、広範囲に展開されて
いる樹脂成形品用途に対し、広くリサイクル、再使用法
の方法を提供することになり、同じ成形品用途にまで再
利用できることも考えれば、地球環境問題や資源保護の
新しい展開の可能性が期待できる。しかしながら、粉
砕、溶融押出除去法には、前述のベントアップや塗膜等
がスクリーンをパスする問題がある。この問題を解決す
るためスクリーンが一定量目づまりすると自動的に新し
いスクリーンに交換するスクリーンオートチェンジャー
を用いることが考えられるが、細かい塗膜等を除去しよ
うとして、スクリーンのメッシュ目開きサイズを小さい
ものにするとすぐに目づまりをおこし、スクリーンオー
トチェンジャーの交換スピードがおいつかなくなり、結
果的に効果がなくなる。又、メッシュ目開きサイズを大
きい方にするとスクリーンオートチェンジャーは有効に
働くが、細かい塗膜等はとれなくなるという問題点があ
る。From this point of view, it has been widely developed to improve economically advantageous pulverization and melt extrusion removal methods and obtain excellent mechanical properties and appearance. Given the wide range of recycling and reuse methods that can be used for products, and the fact that they can be reused even for the same molded product applications, new developments in global environmental issues and resource protection can be expected. However, the pulverization and melt extrusion removal methods have a problem that the above-mentioned vent-up, coating film and the like pass through the screen. To solve this problem, it is conceivable to use a screen autochanger that automatically replaces the screen with a new screen when the screen is clogged by a certain amount, but in order to remove fine coatings, the mesh opening size of the screen should be reduced. Immediately, it will cause clogging, and the replacement speed of the screen autochanger will be lost at some time, resulting in no effect. Further, when the mesh opening size is increased, the screen autochanger works effectively, but there is a problem that a fine coating film cannot be removed.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、かかる観
点より、塗装等により表面被覆加工された樹脂成形品か
ら塗膜等を除去する方法を開発すべく、広汎かつ緻密に
採集、研究した結果、再成形後の成形品の機械的物性や
外観をそこなわないリサイクル樹脂の回収方法を見い出
し、本発明に到達した。From the above viewpoints, the present inventors have extensively and precisely collected and studied in order to develop a method for removing a coating film or the like from a resin molded product surface-coated by coating or the like. As a result, they have found a method for recovering recycled resin that does not affect the mechanical properties and appearance of the molded product after remolding, and arrived at the present invention.
【０００６】すなわち、本発明は、表面被覆加工された
樹脂成形品から表面被覆層が除去された樹脂を回収する
方法において、該樹脂成形品を粉砕する手段および目開
きサイズが１０００μｍ以下のふるいにより分級する手
段を用いることを特徴とするリサイクル用樹脂の回収方
法に関するものである。さらに、本発明は、表面被覆加
工された樹脂成形品から表面被覆層が除去された樹脂を
回収する方法において、該樹脂成形品を粉砕する手段、
目開きサイズが１．９８ｍｍ以下のふるいにより分級す
る手段および比重差分離手段を用いることを特徴とする
リサイクル用樹脂の回収方法に関するものである。That is, the present invention provides a method for recovering a resin from which a surface coating layer has been removed from a surface-coated resin molded product, by means of crushing the resin molded product and a sieve having an opening size of 1000 μm or less. The present invention relates to a method for recovering a resin for recycling, which is characterized by using a classifying means. Further, the present invention provides a method for recovering a resin from which a surface coating layer has been removed from a surface-coated resin molded product, a means for crushing the resin molded product,
The present invention relates to a method for collecting a resin for recycling, which is characterized by using a means for classifying with a sieve having an opening size of 1.98 mm or less and a means for separating specific gravity.
【０００７】本発明によれば、樹脂成形品を粉砕後、粉
砕品の分級にふるいを用い、さらに必要により、ハイド
ロサイクロン等の比重差分離手段を用いて、粉砕品の径
を微少化することにより、通常、分離が困難といわれて
いた塗膜と樹脂の分離が驚くべきことに達成された。According to the present invention, after crushing a resin molded product, a sieve is used for classification of the crushed product, and if necessary, a specific gravity difference separating means such as a hydrocyclone is used to reduce the diameter of the crushed product. This surprisingly achieved the separation of the coating film and the resin, which was usually said to be difficult to separate.
【０００８】本発明における樹脂成形品とは、熱可塑性
樹脂および該熱可塑性樹脂を含有する樹脂組成物からな
る成形品をいう。具体的にはポリエチレン、ポリプロピ
レン、ポリスチレン、ポリ塩化ビニル、ポリメチルメタ
クリレート、ポリアミド、ポリカーボネート、熱可塑性
ポリエステル、ポリフェニレンエーテル等広く市場で用
いられている樹脂、あるいは、エチレン−プロピレンブ
ロック共重合体樹脂、スチレン−アクリロニトリル共重
合体樹脂、アクリロニトリル−スチレン−ブタジエン共
重合体樹脂等、およびこれらの樹脂をベースにしたブレ
ンド系、ポリマーアロイ系、フィラーや繊維強化材、添
加剤や難燃剤等を含有した樹脂組成物等からなる成形品
が挙げられる。該成形品は、射出成形、押出成形、真空
成形等、熱可塑性樹脂一般に用いられる成形法により成
形される。The resin molded product in the present invention refers to a molded product made of a thermoplastic resin and a resin composition containing the thermoplastic resin. Specifically, polyethylene, polypropylene, polystyrene, polyvinyl chloride, polymethylmethacrylate, polyamide, polycarbonate, thermoplastic polyester, polyphenylene ether, and other resins widely used in the market, or ethylene-propylene block copolymer resin, styrene. -Acrylonitrile copolymer resin, acrylonitrile-styrene-butadiene copolymer resin, etc., and a resin composition containing a blend system based on these resins, a polymer alloy system, a filler or fiber reinforcement, an additive, a flame retardant, etc. Examples include molded articles made of things. The molded product is molded by a molding method generally used for thermoplastic resins such as injection molding, extrusion molding and vacuum molding.
【０００９】該樹脂成形品の具体例としては、自動車用
部品、特に、バンパー、インストルメントパネル、フェ
ンダー、トリム、ドアーパネル、ホイールカバー、サイ
ドプロテクター、トランクリッド、ボンネット、ルーフ
等の内装、外装部品であり、二輪車用部品として、カウ
リング、マフラーカバー、レッグシールドなどが挙げら
れる。さらに電気用部品としては、ハウジング、シャー
シーなどを挙げることができる。Specific examples of the resin molded product include automobile parts, particularly interior and exterior parts such as bumpers, instrument panels, fenders, trims, door panels, wheel covers, side protectors, trunk lids, bonnets and roofs. The motorcycle parts include cowlings, muffler covers, leg shields, and the like. Further, examples of the electrical parts include a housing and a chassis.
【００１０】本発明において、表面被覆加工とは、樹脂
成形品の表面に塗装、印刷、接着、ホットスタンプ、蒸
着、スパッタリング、メッキ等により表面被覆層を形成
し、該樹脂成形品の表面に加飾、表面保護等の機能付与
を行う加工技術をいう。In the present invention, the surface coating process means that a surface coating layer is formed on the surface of a resin molded product by painting, printing, adhesion, hot stamping, vapor deposition, sputtering, plating or the like, and is applied to the surface of the resin molded product. Processing technology that gives functions such as decoration and surface protection.
【００１１】本発明において、樹脂成形品を粉砕する手
段とは、該成形品を微細化する手段を意味し、該成形品
を粗粉砕しその後微粉砕する多段粉砕方式や、微細化ま
で一段で行う方式等があるが、その方式は限定されるも
のではない。具体的な粉砕手段としては、ハンマーミ
ル、ターボミル、ジェットミル、ピンミル、遠心ミル、
ロートプレックス、パルベルイザー、湿式粉砕、チョッ
パーミル、ウルトラローター等を用いる粉砕手段が挙げ
られ、常温あるいは冷凍粉砕方式を用いることができ
る。特に、常温で粉砕しにくい、ポリエチレン、ポリプ
ロピレン等は、冷凍粉砕方式または温度上昇防止の工夫
をしている方式が有用で、具体的にはパルベライザー
（独、Ｈｅｒｂｏｌｄ社製）、ウルトラローター（独、
Ａｌｔｅｎｂｕｒｇｅｒ Ｍａｃｈｅｎｅｎ Ｊａｃｈ
ｅｒｉｎｇ社製）などを用いる手段が有用である。粉砕
する程度は微細化される程よいが、好ましくは粒径が２
ｍｍ以下、より好ましくは１０００μｍ以下、さらに好
ましくは７０１μｍ以下が良い。In the present invention, the means for crushing a resin molded product means a means for making the molded product fine, and a multi-stage pulverization method in which the molded product is roughly crushed and then finely pulverized, or one step is required until fineness. There is a method of performing the method, but the method is not limited. Specific grinding means include hammer mill, turbo mill, jet mill, pin mill, centrifugal mill,
Examples of the pulverizing means include a rotoplex, a Pulbelizer, a wet pulverization, a chopper mill, an ultra rotor and the like, and an ordinary temperature or frozen pulverization method can be used. Especially for polyethylene, polypropylene, etc., which are difficult to grind at room temperature, a freeze-grinding method or a method devised to prevent temperature rise is useful. Specifically, a pulsarizer (Germany, manufactured by Herbold), an ultra rotor (Germany, Germany,
Altenburger Machenen Jach
ering company) is useful. The finer the degree of pulverization, the better, but preferably the particle size is 2
mm or less, more preferably 1000 μm or less, still more preferably 701 μm or less.
【００１２】本発明において用いる、ふるいにより分級
する手段とは、粉砕品を分級・分離する方法のうち、乾
式分級手段の一種で、メッシュふるいあるいは振動ふる
い等による分級手段をいう。ふるいの目開きサイズは、
次に述べる比重差分離手段を用いない場合は、１０００
μｍ以下であることが必要であり、好ましくは７０１μ
ｍ以下、さらに好ましくは２０８μｍ以下である。ま
た、比重差分離手段を用いる場合は、１．９８ｍｍ以下
であることが必要であり、好ましくは７０１μｍ以下、
さらに好ましくは２０８μｍ以下である。The means for classifying by sieving used in the present invention is one of the dry classifying means among the methods for classifying and separating pulverized products, and means a classifying means such as mesh sieving or vibrating sieving. The opening size of the sieve is
If the specific gravity difference separation means described below is not used, 1000
It is necessary to be less than μm, preferably 701μ
m or less, more preferably 208 μm or less. Further, when using the specific gravity difference separating means, it is necessary that it is 1.98 mm or less, preferably 701 μm or less,
More preferably, it is 208 μm or less.
【００１３】本発明において用いる比重差分離手段と
は、上記ふるいによる分級後の粉砕品を、風あるいは流
動する水等により分離を行い、より微小化された粉砕品
を得る手段をいう。該比重差分離手段としては、流動す
る水により分離を行なうハイドロサイクロンを用いる手
段が有効である。The specific gravity difference separating means used in the present invention is a means for obtaining a finer pulverized product by separating the pulverized product after classification by the above-mentioned sieve with wind or flowing water. As the specific gravity difference separating means, a means using a hydrocyclone for separating with flowing water is effective.
【００１４】本発明において、分級・分離手段を用いた
後、パスした微小化粉砕品を溶融押出造粒し、リサイク
ル用樹脂として回収した方が好ましい。該溶融押出造粒
には、一軸スクリュー押出機、２軸スクリュー押出機等
を用いることができる。In the present invention, it is preferable that after passing through the classifying / separating means, the passed micronized pulverized product is melt-extruded and granulated and recovered as a resin for recycling. A single-screw extruder, a twin-screw extruder, or the like can be used for the melt extrusion granulation.
【００１５】[0015]
【実施例】以下、実施例により本発明を説明するが、こ
れらは単なる例示であり、本発明はこれに限定されるこ
とはない。なお、実施例中の残存塗膜量については次の
ように測定した。先ず、標準サンプルとして、下記塗装
成形品を２０８μ以下に全量を細かく粉砕したものをプ
レス成形し、蛍光Ｘ線でＴｉ含有量を定量した。その値
を残存塗膜量１００％とし、塗装していないものをこの
系に、３０ｗｔ％、７０ｗｔ％になるよう混合した系及
び、塗装してないもののみのＴｉ含有量と残存塗膜量の
直線関係を得、検量線とした。実施例中の残存塗膜量
は、各々のＴｉ含量を蛍光Ｘ線にて定量化し、この検量
線を用いて算出した。樹脂成形品は、ポリプロピレン系
樹脂組成物（エチレン−プロピレンブロックコポリマー
／タルク＝９０／１０ｗｔ％）を射出成形にて得た。
（厚み３ｍｍ）その後、クロロセンにて脱脂前処理し、
プライマー（「ＲＢ１１５」登録商標日本ビーケミカル
社製）を塗布し、風乾した。そして、変性ウレタン系白
塗料「フレキセン１０１」登録商標 日本ビーケミカル
社製）を塗布後、１２０℃、３０分焼きつけ乾燥し、塗
装成形品を得た。（プライマー厚み５μｍ、塗装厚み１
００μ）EXAMPLES The present invention will be described below with reference to examples, but these are merely examples and the present invention is not limited thereto. The amount of the remaining coating film in the examples was measured as follows. First, as a standard sample, the following coating-molded product was finely crushed to a size of 208 μ or less and press-molded, and the Ti content was quantified by fluorescent X-ray. The value was taken as the residual coating amount of 100%, and the uncoated one was mixed with this system so as to be 30 wt% and 70 wt%, and the Ti content and the residual coating amount of only the uncoated one. A linear relationship was obtained and used as a calibration curve. The amount of residual coating film in the examples was calculated by quantifying each Ti content by fluorescent X-ray and using this calibration curve. The resin molded product was obtained by injection molding a polypropylene resin composition (ethylene-propylene block copolymer / talc = 90/10 wt%).
(Thickness 3 mm) After that, degreasing pretreatment with chlorothene,
A primer ("RB115" registered trademark, manufactured by Nippon Bee Chemical Co., Ltd.) was applied and air dried. Then, a modified urethane white paint "Flexen 101" (registered trademark, manufactured by Nippon Bee Chemical Co., Ltd.) was applied, followed by baking at 120 ° C for 30 minutes and drying to obtain a coated molded article. (Primer thickness 5 μm, coating thickness 1
00μ)
【００１６】実施例１ このようにして得られた塗装成形品を５ｍｍ径の穴のあ
いたスクリーンをもつ粉砕機（「ＪＣ７型」登録商標
森田製作所製）で２２０ｋｇ／ｈｒの処理速度で常温に
て粗粉砕し、２４メッシュ（目開きサイズ７０１μｍ）
のスクリーンでパスしたものをとりだした。このときの
パス品の残存塗膜量は、８５ｗｔ％であった。Example 1 The coated molded product thus obtained was crushed with a screen having a hole with a diameter of 5 mm ("JC7 type" registered trademark).
Morita Seisakusho Co., Ltd.) coarsely crushed at room temperature at a processing rate of 220 kg / hr and 24 mesh (opening size 701 μm)
I took out what passed on the screen. The residual coating film amount of the pass product at this time was 85 wt%.
【００１７】比較例１ 実施例１と同じように粗粉砕したものを、９メッシュ
（目開きサイズ１．９８ｍｍ）パスするものだけをとり
だした。このときのパス品の残存塗膜量は９８ｗｔ％で
あった。Comparative Example 1 The same coarsely pulverized as in Example 1 was taken out so that only 9 mesh (mesh size 1.98 mm) passed. The residual coating film amount of the pass product at this time was 98 wt%.
【００１８】実施例２ 実施例１と同じように粗粉砕後、微粉砕したものを６５
メッシュ（目開きサイズ２０８μｍ）パスするものだけ
をとりだした。このときのパス品の残存塗膜量は５０ｗ
ｔ％であった。Example 2 After roughly crushing and then finely crushing in the same manner as in Example 1, 65
Only those that passed the mesh (opening size 208 μm) were taken out. The amount of remaining coating film of the pass product at this time is 50w
It was t%.
【００１９】実施例３ 比較例１のものを、ハイドロサイクロン「円錐型サイク
ロン」登録商標（帝人エンジニアリング社製）に、スラ
リー溶度１ｗｔ％でかけたところオーバーフロー側に分
離されたものの残存塗膜量は７０ｗｔ％であった。Example 3 The product of Comparative Example 1 was applied to a hydrocyclone "conical cyclone" registered trademark (manufactured by Teijin Engineering Co., Ltd.) at a slurry solubility of 1 wt%. It was 70 wt%.
【００２０】実施例４ 実施例１でえられた２４メッシュパス品をハイドロサイ
クロン「ＳＰ−３０」登録商標（ラサ工業社製）にスラ
リー濃度２ｗｔ％でかけたところオーバーフロー側に分
離されたものの残存塗膜量は５０ｗｔ％であった。Example 4 The 24-mesh pass product obtained in Example 1 was applied to a hydrocyclone "SP-30" registered trademark (manufactured by Lhasa Kogyo Co., Ltd.) at a slurry concentration of 2 wt%, and the remaining coating separated on the overflow side was applied. The film amount was 50 wt%.
【００２１】実施例５ 実施例２でえられた６５メッシュパス品を実施例４と同
じ方法でハイドロサイクロンにかけたところ、オーバー
フロー側に分離されたものの残存塗膜量は３０ｗｔ％で
あった。Example 5 The 65-mesh pass product obtained in Example 2 was subjected to a hydrocyclone in the same manner as in Example 4. As a result, the amount of residual coating film separated on the overflow side was 30 wt%.
【００２２】[0022]
【発明の効果】以上述べたように、本発明によれば、表
面被覆加工された樹脂成形品を粉砕し、ふるい分級によ
り粒径を微少化する事により、さらには比重差分離によ
り、はじめて塗膜の除去効率を大巾に向上し、成形品外
観および物性低下を大巾に改善した、リサイクル用樹脂
の回収方法を提供することができる。As described above, according to the present invention, the surface-coated resin molded product is crushed, and the particle size is reduced by sieving classification, and further, it is applied for the first time by specific gravity difference separation. It is possible to provide a method for recovering a resin for recycling, in which the efficiency of removing a film is greatly improved and the appearance and physical properties of a molded product are greatly reduced.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西尾 太一 千葉県市原市姉崎海岸５の１ 住友化学工 業株式会社内 (72)発明者 山本 正志 千葉県市原市姉崎海岸５の１ 住友化学工 業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Taichi Nishio, 1-5 Anesaki Kaigan, Ichihara, Chiba Prefecture Sumitomo Chemical Co., Ltd. (72) Masashi Yamamoto 1-5, Anesaki Kaigan, Ichihara, Chiba Sumitomo Chemical Co., Ltd. Within the corporation
Claims (5)
覆層が除去された樹脂を回収する方法において、該樹脂
成形品を粉砕する手段および目開きサイズが１０００μ
ｍ以下のふるいにより分級する手段を用いることを特徴
とするリサイクル用樹脂の回収方法。1. A method for recovering a resin from which a surface coating layer has been removed from a surface-coated resin molded article, wherein the means for crushing the resin molded article and the opening size are 1000 μm.
A method for recovering a resin for recycling, characterized by using a means for classifying with a sieve of m or less.
覆層が除去された樹脂を回収する方法において、該樹脂
成形品を粉砕する手段、目開きサイズが１．９８ｍｍ以
下のふるいにより分級する手段および比重差分離手段を
用いることを特徴とするリサイクル用樹脂の回収方法。2. A method for recovering a resin from which a surface coating layer has been removed from a surface-coated resin molded product, wherein the resin molded product is classified by means of crushing and a sieve having an opening size of 1.98 mm or less. And a method for recovering a resin for recycling, characterized by using a means and a specific gravity difference separating means.
ある請求項１または２記載の方法。3. The method according to claim 1, wherein the sieve has an opening size of 701 μm or less.
ある請求項１または２記載の方法。4. The method according to claim 1, wherein the sieve has an opening size of 208 μm or less.
いる手段である請求項２記載の方法。5. The method according to claim 2, wherein the specific gravity difference separating means is a means using a hydrocyclone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16744392A JP2730409B2 (en) | 1992-06-25 | 1992-06-25 | How to collect resin for recycling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16744392A JP2730409B2 (en) | 1992-06-25 | 1992-06-25 | How to collect resin for recycling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH068245A true JPH068245A (en) | 1994-01-18 |
| JP2730409B2 JP2730409B2 (en) | 1998-03-25 |
Family
ID=15849804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16744392A Expired - Fee Related JP2730409B2 (en) | 1992-06-25 | 1992-06-25 | How to collect resin for recycling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2730409B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107150419A (en) * | 2017-05-22 | 2017-09-12 | 芜湖博康机电有限公司 | A kind of leftover pieces retracting device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06819A (en) * | 1992-06-19 | 1994-01-11 | Isuzu Motors Ltd | Recycling method of coated plastic |
-
1992
- 1992-06-25 JP JP16744392A patent/JP2730409B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06819A (en) * | 1992-06-19 | 1994-01-11 | Isuzu Motors Ltd | Recycling method of coated plastic |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107150419A (en) * | 2017-05-22 | 2017-09-12 | 芜湖博康机电有限公司 | A kind of leftover pieces retracting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2730409B2 (en) | 1998-03-25 |
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