JP2003048210A - Method for reusing polypropylene resin molded product and releasing agent for resin paint film - Google Patents
Method for reusing polypropylene resin molded product and releasing agent for resin paint filmInfo
- Publication number
- JP2003048210A JP2003048210A JP2001237338A JP2001237338A JP2003048210A JP 2003048210 A JP2003048210 A JP 2003048210A JP 2001237338 A JP2001237338 A JP 2001237338A JP 2001237338 A JP2001237338 A JP 2001237338A JP 2003048210 A JP2003048210 A JP 2003048210A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- coating film
- polypropylene resin
- polypropylene
- resin coating
- 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
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
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Paints Or Removers (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (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]
【発明の属する技術分野】本発明は、熱硬化性樹脂塗膜
が形成されているポリプロピレン系樹脂成形品の再利用
方法及び該再利用方法に用いる樹脂塗膜剥離剤に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reusing a polypropylene resin molded article having a thermosetting resin coating film formed thereon, and a resin coating film peeling agent used in the recycling method.
【０００２】[0002]
【従来の技術】従来、自動車用のバンパー等として、ポ
リプロピレン系樹脂成形品が用いられている。ポリプロ
ピレン系樹脂は成形品材料としての諸物性に優れている
上、回収再生が比較的容易であるので、製造工程で不良
とされたバンパーや、使用済みのバンパーからポリプロ
ピレン系樹脂を再生し、樹脂成形品材料として再利用す
ることが検討されている。2. Description of the Related Art Conventionally, polypropylene resin molded articles have been used as bumpers for automobiles. Polypropylene resin has excellent properties as a molding material and is relatively easy to recover and recycle.Therefore, polypropylene resin is regenerated from bumpers that have been defective in the manufacturing process or used bumpers. Reuse as a molding material is being considered.
【０００３】ところが、前記バンパーは表面に熱硬化性
樹脂塗膜が形成されているので、前記バンパーから前記
塗膜を剥離せずに、そのままポリプロピレン系樹脂とし
て再生すると、成形したときに耐衝撃性、機械的強度が
低く、亀裂が発生しやすい樹脂が得られるに過ぎない。
前記バンパーは、高度の機械的強度、外観品質が求めら
れるので、前記のようにして再生されたポリプロピレン
系樹脂は、バンパーの材料には用いることができず、低
グレードの成形品材料としてのみ使用されている。However, since the thermosetting resin coating film is formed on the surface of the bumper, if it is regenerated as a polypropylene resin as it is without peeling the coating film from the bumper, the impact resistance when molded is high. However, it is only possible to obtain a resin that has low mechanical strength and is prone to cracking.
Since the bumper is required to have high mechanical strength and appearance quality, the polypropylene resin regenerated as described above cannot be used as a material for the bumper, and is used only as a low-grade molded article material. Has been done.
【０００４】そこで、前記バンパーから前記熱硬化性樹
脂塗膜を剥離することにより、高品質のポリプロピレン
系樹脂として再生する技術が提案されている。例えば、
特許第２５１２２６５号公報には、前記バンパーをＮ−
メチル−２−ピロリドン等のピロリドン液に浸漬して前
記熱硬化性樹脂塗膜を剥離した後、該ピロリドン液中で
比重差によりポリプロピレン系樹脂と前記塗膜とを分離
し、回収されたポリプロピレン系樹脂を加熱下にペレッ
ト化して再生する技術が記載されている。Therefore, a technique has been proposed in which the thermosetting resin coating film is peeled from the bumper to regenerate it as a high quality polypropylene resin. For example,
In Japanese Patent No. 2512265, the bumper is N-
After removing the thermosetting resin coating film by immersing it in a pyrrolidone solution such as methyl-2-pyrrolidone, the polypropylene resin and the coating film are separated in the pyrrolidone solution due to the difference in specific gravity, and the polypropylene system is recovered. A technique for pelletizing a resin under heating to regenerate it is described.
【０００５】前記公報の記載によれば、前記バンパーを
前記ピロリドン液に浸漬することにより前記塗膜を完全
に剥離することができるので、高品質の再生ポリプロピ
レン系樹脂を得ることができるとされている。According to the description of the above publication, the coating film can be completely peeled off by immersing the bumper in the pyrrolidone solution, so that a high quality recycled polypropylene resin can be obtained. There is.
【０００６】しかしながら、前記技術により再生された
ポリプロピレン系樹脂を用いて射出成形によりバンパー
を製造すると、成形金型が傷みやすく、該成形金型の寿
命が短くなると共に、得られたバンパーの機械的強度が
低くなるという不都合がある。However, when a bumper is manufactured by injection molding using the polypropylene resin regenerated by the above technique, the molding die is easily damaged, the life of the molding die is shortened, and the mechanical properties of the obtained bumper are reduced. There is an inconvenience that the strength becomes low.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、かかる不都
合を解消して、再生されたポリプロピレン系樹脂を用い
て射出成形する際に金型を傷めることが無いと共に、機
械的強度に優れた成形品を製造することができる高品質
の再生ポリプロピレン系樹脂を得ることができるポリプ
ロピレン系樹脂成形品の再利用方法を提供することを目
的とする。DISCLOSURE OF THE INVENTION The present invention eliminates such inconvenience, and does not damage the mold at the time of injection molding using a regenerated polypropylene resin, and is excellent in mechanical strength. An object of the present invention is to provide a method for reusing a polypropylene-based resin molded product, which is capable of obtaining a high-quality recycled polypropylene-based resin capable of producing a product.
【０００８】また、本発明の目的は、前記再利用方法に
用いる樹脂塗膜剥離剤を提供することにもある。Another object of the present invention is to provide a resin coating film peeling agent used in the above recycling method.
【０００９】[0009]
【課題を解決するための手段】本発明者らは、前記バン
パーをＮ−メチル−２−ピロリドン等のピロリドン液に
浸漬して前記熱硬化性樹脂塗膜を剥離することにより得
られた再生ポリプロピレン系樹脂を用いて射出成形を行
うと、得られた成形品の機械的強度が低くなると共に、
成形金型が傷む原因について鋭意検討を重ねた。この結
果、前記のようにして前記熱硬化性樹脂塗膜を剥離して
回収されたポリプロピレン系樹脂には、剥離剤のピロリ
ドン液が付着していること、前記ピロリドンは沸点が高
いために前記ペレット化する工程でも気化せず、該ペレ
ット化より高温で処理される射出成形時に初めて気化す
ること、このように気化したピロリドン蒸気により成形
金型が腐食されることを見出した。また、前記ピロリド
ンは前記射出成形により製造された成形品中にも残存
し、これにより得られた成形品の機械的強度が低くなる
ことを見出した。DISCLOSURE OF THE INVENTION The present inventors have regenerated polypropylene obtained by immersing the bumper in a pyrrolidone solution such as N-methyl-2-pyrrolidone and peeling off the thermosetting resin coating film. When injection molding is performed using a system resin, the mechanical strength of the obtained molded product decreases and
We have made extensive studies on the cause of damage to the molding die. As a result, the polypropylene resin recovered by peeling off the thermosetting resin coating film as described above, the pyrrolidone solution of the release agent is adhered, the pyrrolidone has a high boiling point, the pellets. It has been found that the vaporization does not occur even in the process of vaporizing, the vaporization occurs only at the time of injection molding which is performed at a higher temperature than the pelletization, and the vaporizing pyrrolidone vapor corrodes the molding die. It was also found that the pyrrolidone remains in the molded product produced by the injection molding, and the mechanical strength of the molded product thus obtained is lowered.
【００１０】本発明者らは前記知見に基づいてさらに検
討を重ね、ポリプロピレン系樹脂成形品の表面に形成さ
れた熱硬化性樹脂塗膜を剥離することができると共に、
回収されたポリプロピレン系樹脂から容易に除去するこ
とができ、射出成形工程に残留することのない剥離剤と
して、シクロヘキサノンを用いることができることを見
出し、本発明に到達した。The inventors of the present invention have conducted further studies based on the above findings, and are able to peel off the thermosetting resin coating film formed on the surface of the polypropylene resin molded article, and
The present inventors have found that cyclohexanone can be used as a release agent that can be easily removed from the recovered polypropylene-based resin and does not remain in the injection molding process, and thus arrived at the present invention.
【００１１】そこで、前記目的を達成するために、本発
明のポリプロピレン系樹脂成形品の再利用方法は、熱硬
化性樹脂塗膜が形成されているポリプロピレン系樹脂成
形品を実質的にシクロヘキサノンからなる樹脂塗膜剥離
剤に浸漬して該ポリプロピレン系樹脂から該樹脂塗膜を
剥離せしめ、該ポリプロピレン系樹脂と該樹脂塗膜とを
分離して該ポリプロピレン系樹脂を回収し、回収された
該ポリプロピレン系樹脂を加熱下にペレット状体に再生
加工し、該ペレット状体を用いて射出成形を行うことを
特徴とする本発明の方法によれば、まず、熱硬化性樹脂
塗膜が形成されているポリプロピレン系樹脂成形品を実
質的にシクロヘキサノンからなる樹脂塗膜剥離剤に浸漬
する。前記樹脂塗膜剥離剤は、ほぼ純粋なシクロヘキサ
ノンからなるが、製造工程、精製工程等で混入する水
分、有機物等の不可避的不純物を含んでいてもよい。Therefore, in order to achieve the above object, the method for reusing a polypropylene resin molded article of the present invention comprises a polypropylene resin molded article on which a thermosetting resin coating film is formed, substantially consisting of cyclohexanone. The polypropylene resin is immersed in a resin coating film release agent to separate the resin coating film from the polypropylene resin, the polypropylene resin and the resin coating film are separated to recover the polypropylene resin, and the polypropylene resin is recovered. According to the method of the present invention characterized in that the resin is reprocessed into pellets under heating and injection molding is performed using the pellets, first, a thermosetting resin coating film is formed. A polypropylene resin molded article is immersed in a resin coating film peeling agent consisting essentially of cyclohexanone. The resin coating film peeling agent is composed of almost pure cyclohexanone, but may contain inevitable impurities such as water and organic substances mixed in the manufacturing process, the purification process and the like.
【００１２】前記樹脂成形品を前記樹脂塗膜剥離剤に浸
漬すると、シクロヘキサノンが前記樹脂成形品のポリプ
ロピレン系樹脂と前記熱硬化性樹脂塗膜との界面に浸透
して行って前記熱硬化性樹脂塗膜が剥離され、ポリプロ
ピレン系樹脂と熱硬化性樹脂塗膜とに分離される。When the resin molded article is dipped in the resin coating film release agent, cyclohexanone penetrates into the interface between the polypropylene resin of the resin molded article and the thermosetting resin coating film to form the thermosetting resin. The coating film is peeled off and separated into a polypropylene resin and a thermosetting resin coating film.
【００１３】ここで、前記熱硬化性樹脂塗膜の比重は約
１．２であり、ポリプロピレン系樹脂の比重は約０．９
０〜０．９１であるのに対して、シクロヘキサノンの比
重は０．９４２であるので、剥離された前記熱硬化性樹
脂塗膜は前記樹脂塗膜剥離剤の液底に沈降し、ポリプロ
ピレン系樹脂は液面に浮上する。この結果、液面に浮上
したポリプロピレン系樹脂を容易に回収することができ
る。The specific gravity of the thermosetting resin coating film is about 1.2, and the specific gravity of the polypropylene resin is about 0.9.
The specific gravity of cyclohexanone is 0.942, while the specific gravity of cyclohexanone is 0.942. Therefore, the peeled thermosetting resin coating film settles on the liquid bottom of the resin coating film release agent, and the polypropylene resin Floats on the liquid surface. As a result, the polypropylene resin floating on the liquid surface can be easily collected.
【００１４】回収されたポリプロピレン系樹脂は、次
に、１８０〜２００℃に加熱されることにより溶融さ
れ、ダイから押し出されることにより、ペレット状体に
再生加工される。前記回収されたポリプロピレン系樹脂
は、前記樹脂塗膜剥離剤により前記熱硬化性樹脂塗膜が
完全に除去されているので、前記ペレット状体に再生加
工することにより、高品質の再生ポリプロピレン系樹脂
を得ることができる。The recovered polypropylene resin is then melted by heating at 180 to 200 ° C. and extruded from the die to be regenerated into pellets. Since the thermosetting resin coating film is completely removed by the resin coating film peeling agent in the recovered polypropylene resin, a high quality recycled polypropylene resin resin is produced by reprocessing the pellet-shaped body. Can be obtained.
【００１５】このとき、回収されたポリプロピレン系樹
脂には、前記樹脂塗膜剥離剤のシクロヘキサノンが付着
しているが、シクロヘキサノンの沸点は１５５．７℃で
あり、前記回収されたポリプロピレン系樹脂を溶融する
温度範囲よりも低いので、前記溶融のための加熱により
気化する。この結果、シクロヘキサノンが除去されたペ
レット状体を得ることができる。At this time, cyclohexanone as the resin coating film peeling agent adheres to the recovered polypropylene resin, but the boiling point of cyclohexanone is 155.7 ° C., and the recovered polypropylene resin is melted. Since the temperature is lower than the temperature range for heating, it is vaporized by the heating for melting. As a result, a pellet-shaped body from which cyclohexanone has been removed can be obtained.
【００１６】前記ペレット状体は、次に、２００〜２２
０℃の加熱下に射出成形を行うことにより自動車用のバ
ンパー等の成形品とすることにより再利用される。この
とき、前記ペレット状体は、前記のようにシクロヘキサ
ノンが除去されているので、前記射出成形によりシクロ
ヘキサノンが気化することがなく、シクロヘキサノン蒸
気による成形金型の損傷を防止することができる。ま
た、前記のようにシクロヘキサノンが除去されている前
記ペレット状体を用いることにより、前記射出成形品に
シクロヘキサノンが残存することがなく、機械的強度に
優れた射出成形品を得ることができる。The pellets are then
By injection molding under heating at 0 ° C., a molded article such as an automobile bumper is reused. At this time, since cyclohexanone has been removed from the pellets as described above, cyclohexanone is not vaporized by the injection molding, and damage to the molding die due to cyclohexanone vapor can be prevented. Moreover, by using the pellet-shaped body from which cyclohexanone has been removed as described above, cyclohexanone does not remain in the injection molded product, and an injection molded product excellent in mechanical strength can be obtained.
【００１７】本発明の方法では、前述のように、熱硬化
性樹脂塗膜が形成されているポリプロピレン系樹脂成形
品から該樹脂塗膜を剥離せしめる剥離剤として、実質的
にシクロヘキサノンからなる樹脂塗膜剥離剤を好適に用
いることができる。In the method of the present invention, as described above, a resin coating substantially consisting of cyclohexanone is used as a release agent for peeling the resin coating film from the polypropylene resin molded article on which the thermosetting resin coating film is formed. A film peeling agent can be preferably used.
【００１８】[0018]
【発明の実施の形態】次に、本発明の実施の形態につい
てさらに詳しく説明する。BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described in more detail.
【００１９】本実施形態では、表面に熱硬化性樹脂塗膜
が形成されているポリプロピレン系樹脂成形品として、
製造工程で不良とされた自動車用バンパーまたは廃車か
ら取り外された使用済みの自動車用バンパーを用いる。In the present embodiment, as a polypropylene resin molded article having a thermosetting resin coating film formed on its surface,
Use an automobile bumper that has been defective in the manufacturing process or a used automobile bumper that has been removed from a scrap car.
【００２０】前記ポリプロピレン系樹脂は、重合法の相
違による各種結晶構造のものを含み、エチレン−プロピ
レン共重合体ゴム、エチレン−プロピレン−ブタジエン
３元共重合体等のエチレン系共重合体ゴムを配合したも
のでもよい。また、前記ポリプロピレン系樹脂は、さら
にタルク、炭酸カルシウム等の無機性フィラー、カーボ
ンブラック等の顔料、酸化防止剤、紫外線吸収剤、熱安
定剤等の添加剤を含んでいてもよい。The polypropylene-based resins include those having various crystal structures depending on the polymerization method, and blended with ethylene-based copolymer rubbers such as ethylene-propylene copolymer rubber and ethylene-propylene-butadiene terpolymer. You can also use it. Further, the polypropylene-based resin may further contain an additive such as an inorganic filler such as talc and calcium carbonate, a pigment such as carbon black, an antioxidant, an ultraviolet absorber and a heat stabilizer.
【００２１】前記熱硬化性樹脂塗膜は、通常の塗料に用
いられるものであって、ウレタン樹脂、フェノール樹
脂、メラニン樹脂、エポキシ樹脂、アルキド樹脂、尿素
樹脂等からなるもの等を挙げることができる。The thermosetting resin coating film is used for ordinary paints, and examples thereof include urethane resin, phenol resin, melanin resin, epoxy resin, alkyd resin, urea resin and the like. .
【００２２】次に、前記バンパーを切断機、圧砕機等で
０．１ｍｍ角〜２０ｃｍ角程度の小片に分割し、実質的
にシクロヘキサノンからなる樹脂塗膜剥離剤に浸漬して
撹拌する。この結果、前記樹脂塗膜剥離剤のシクロヘキ
サノンが前記バンパーを構成するポリプロピレン系樹脂
と、該ポリプロピレン系樹脂の表面に形成されている前
記熱硬化性樹脂塗膜との界面に浸透していき、前記熱硬
化性樹脂塗膜を剥離させることにより、ポリプロピレン
系樹脂と熱硬化性樹脂塗膜とを分離する。Next, the bumper is divided into small pieces of about 0.1 mm square to 20 cm square by a cutting machine, a crusher, etc., and immersed in a resin coating film peeling agent consisting essentially of cyclohexanone and stirred. As a result, cyclohexanone of the resin coating film release agent penetrates into the interface between the polypropylene resin forming the bumper and the thermosetting resin coating film formed on the surface of the polypropylene resin, By peeling the thermosetting resin coating film, the polypropylene resin and the thermosetting resin coating film are separated.
【００２３】分離されたポリプロピレン系樹脂と熱硬化
性樹脂塗膜とは、シクロヘキサノンの比重が０．９４２
であるのに対して、前記ポリプロピレン系樹脂の比重は
約０．９０〜０．９１であり、前記熱硬化性樹脂塗膜の
比重は約１．２であるので、前記ポリプロピレン系樹脂
は液面に浮上し、前記熱硬化性樹脂塗膜は液底に沈降す
る。そこで、前記樹脂塗膜剥離剤の液面に浮上した前記
ポリプロピレン系樹脂を回収する。Cyclohexanone has a specific gravity of 0.942 in the separated polypropylene resin and thermosetting resin coating film.
On the other hand, the specific gravity of the polypropylene resin is about 0.90 to 0.91 and the specific gravity of the thermosetting resin coating film is about 1.2. And the thermosetting resin coating film settles on the liquid bottom. Therefore, the polypropylene resin floating on the liquid surface of the resin coating film peeling agent is collected.
【００２４】次に、前記のようにして回収されたポリプ
ロピレン系樹脂を水洗し、乾燥した後、ペレット化す
る。前記ペレット化は、乾燥されたポリプロピレン系樹
脂を、１８０〜２００℃に加熱して溶融し、ダイから押
し出すことにより行うことができ、ペレット状の再生ポ
リプロピレン系樹脂を得る。前記再生ポリプロピレン系
樹脂は、前記ペレット化に際し、予め、前記エチレン系
共重合体ゴム、前記添加剤等が配合されていてもよい。Next, the polypropylene resin recovered as described above is washed with water, dried and then pelletized. The pelletization can be performed by heating the dried polypropylene resin to 180 to 200 ° C. to melt it and extruding it from a die to obtain a pelletized recycled polypropylene resin. The regenerated polypropylene-based resin may be preliminarily blended with the ethylene-based copolymer rubber, the additive and the like at the time of pelletizing.
【００２５】前記再生ポリプロピレン系樹脂は、２００
〜２２０℃の加熱下に射出成形を行うことにより、自動
車用バンパーに加工して再利用することができる。前記
再生ポリプロピレン系樹脂は、前記ペレット化における
加熱により前記樹脂塗膜剥離剤であるシクロヘキサノン
が気化して除去されているので、前記射出成形に用いる
金型を傷めることがないと共に、優れた機械的強度を備
えるバンパーを得ることができる。The recycled polypropylene resin is 200
By performing injection molding under heating at 220 ° C., it can be processed into a bumper for automobile and reused. Since the recycled polypropylene resin has been vaporized and removed by cyclohexanone, which is the resin coating film release agent, by heating in the pelletization, it does not damage the mold used for the injection molding, and has excellent mechanical properties. A bumper with strength can be obtained.
【００２６】次に、本実施形態で得られた再生ポリプロ
ピレン系樹脂の物性について、引張降伏強度及び曲げ強
度を試験した。前記引張降伏強度は、ＡＳＴＭ Ｄ ６
３８に準ずる自動車用樹脂材料一般試験方法により、本
実施形態で得られた再生ポリプロピレン系樹脂を用いて
ＡＳＴＭ Ｎｏ．１ダンベル（板厚３．２ｍｍ）を製造
し、該ダンベルについて測定した。結果を引張伸び率と
して表１に示す。また、前記曲げ強度は、ＡＳＴＭ Ｄ
７９０に準ずる自動車用樹脂材料一般試験方法によ
り、本実施形態で得られた再生ポリプロピレン系樹脂を
用いて、全長１２７ｍｍ、幅１２．７ｍｍ、高さ（両端
２点と中央１点の平均値）６．３５ｍｍの試験片を製造
し、該試験片について測定した。結果を曲げ弾性率とし
て表１に示す。Next, the tensile yield strength and bending strength of the recycled polypropylene resin obtained in this embodiment were tested. The tensile yield strength is ASTM D 6
According to the general test method for automotive resin materials according to No. 38, the regenerated polypropylene resin obtained in the present embodiment was used to obtain ASTM No. One dumbbell (thickness: 3.2 mm) was manufactured, and the dumbbell was measured. The results are shown in Table 1 as tensile elongation. Also, the bending strength is ASTM D
Using the regenerated polypropylene resin obtained in the present embodiment, according to the general test method for automobile resin materials according to 790, the total length is 127 mm, the width is 12.7 mm, and the height (the average value of two ends and one center point). A test piece of 0.35 mm was manufactured, and the test piece was measured. The results are shown in Table 1 as flexural modulus.
【００２７】また、比較のために本実施形態で用いた樹
脂塗膜剥離剤に替えて、Ｎ−メチル−２−ピロリドンを
用いた以外は本実施形態と全く同一にして得られた再生
ポリプロピレン系樹脂（比較例）と、参考のために未使
用のポリプロピレン系樹脂（参考例）とについて、本実
施形態の場合と同一にして引張降伏強度及び曲げ強度を
試験した。結果を併せて表１に示す。For comparison, a recycled polypropylene system obtained in exactly the same manner as this embodiment except that N-methyl-2-pyrrolidone was used instead of the resin coating film release agent used in this embodiment. The tensile yield strength and bending strength of the resin (comparative example) and an unused polypropylene resin for reference (reference example) were tested in the same manner as in the present embodiment. The results are also shown in Table 1.
【００２８】[0028]
【表１】
表１から、本実施形態で得られた再生ポリプロピレン系
樹脂は、比較例の再生ポリプロピレン系樹脂に比較して
優れた機械的強度を備えており、未使用のポリプロピレ
ン系樹脂（参考例）に近い物性を備えていることが明ら
かである。[Table 1] From Table 1, the regenerated polypropylene-based resin obtained in the present embodiment has excellent mechanical strength as compared with the regenerated polypropylene-based resin of the comparative example, and is close to an unused polypropylene-based resin (reference example). It is clear that it has physical properties.
【００２９】また、本実施形態で用いる樹脂塗膜剥離剤
は、使用後、前記バンパーから剥離された熱硬化性樹脂
塗膜を分離した後、濃縮し、蒸留することにより精製し
て再利用に供することができる。In addition, the resin coating film release agent used in this embodiment is used, after the thermosetting resin coating film separated from the bumper is separated, concentrated and distilled for purification and reuse. Can be offered.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｂ２９Ｋ 23:00 Ｂ２９Ｋ 23:00 Ｆターム(参考） 4D071 AA42 AB23 DA15 4F201 AA11 AA50 AB19A BA02 BC19 BC25 BD04 BK13 BL29 4F301 AA12 BF06 BF09 BF31 CA09 4J038 RA02 RA15 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) // B29K 23:00 B29K 23:00 F term (reference) 4D071 AA42 AB23 DA15 4F201 AA11 AA50 AB19A BA02 BC19 BC25 BD04 BK13 BL29 4F301 AA12 BF06 BF09 BF31 CA09 4J038 RA02 RA15
Claims (2)
ロピレン系樹脂成形品を実質的にシクロヘキサノンから
なる樹脂塗膜剥離剤に浸漬して該樹脂成形品から該樹脂
塗膜を剥離せしめ、該ポリプロピレン系樹脂と該樹脂塗
膜とを分離して該ポリプロピレン系樹脂を回収し、回収
された該ポリプロピレン系樹脂を加熱下にペレット状体
に再生加工し、該ペレット状体を用いて射出成形を行う
ことを特徴とするポリプロピレン系樹脂成形品の再利用
方法。1. A polypropylene-based resin molded article having a thermosetting resin coating film formed thereon is immersed in a resin coating film release agent consisting essentially of cyclohexanone to release the resin coating film from the resin molded article. The polypropylene resin and the resin coating film are separated to recover the polypropylene resin, the recovered polypropylene resin is reprocessed into pellets under heating, and injection molding is performed using the pellets. A method for reusing a polypropylene-based resin molded article, the method comprising:
ロピレン系樹脂成形品から該樹脂塗膜を剥離せしめる剥
離剤であって、実質的にシクロヘキサノンからなる樹脂
塗膜剥離剤。2. A release agent for releasing a resin coating film from a polypropylene resin molded article having a thermosetting resin coating film formed thereon, which is substantially a cyclohexanone release agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001237338A JP4523208B2 (en) | 2001-08-06 | 2001-08-06 | Method for reusing polypropylene resin molded product and resin coating film release agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001237338A JP4523208B2 (en) | 2001-08-06 | 2001-08-06 | Method for reusing polypropylene resin molded product and resin coating film release agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003048210A true JP2003048210A (en) | 2003-02-18 |
| JP4523208B2 JP4523208B2 (en) | 2010-08-11 |
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ID=19068434
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001237338A Expired - Fee Related JP4523208B2 (en) | 2001-08-06 | 2001-08-06 | Method for reusing polypropylene resin molded product and resin coating film release agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008101118A (en) * | 2006-10-19 | 2008-05-01 | Jsr Corp | Resin composition and molded product |
| JP2013237719A (en) * | 2012-05-11 | 2013-11-28 | Nicca Chemical Co Ltd | Method of producing recycled polypropylene resin molded product |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05194705A (en) * | 1991-10-17 | 1993-08-03 | Sumitomo Bayer Urethane Kk | Method for decomposing polymer containing urethane and/or urea linkage |
| JPH0631731A (en) * | 1992-07-17 | 1994-02-08 | Mitsubishi Kasei Corp | Recovering method for polypropylene resin molding |
| JPH07331138A (en) * | 1994-06-13 | 1995-12-19 | Create:Kk | Method and apparatus for removing coating film from resin article |
-
2001
- 2001-08-06 JP JP2001237338A patent/JP4523208B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05194705A (en) * | 1991-10-17 | 1993-08-03 | Sumitomo Bayer Urethane Kk | Method for decomposing polymer containing urethane and/or urea linkage |
| JPH0631731A (en) * | 1992-07-17 | 1994-02-08 | Mitsubishi Kasei Corp | Recovering method for polypropylene resin molding |
| JPH07331138A (en) * | 1994-06-13 | 1995-12-19 | Create:Kk | Method and apparatus for removing coating film from resin article |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008101118A (en) * | 2006-10-19 | 2008-05-01 | Jsr Corp | Resin composition and molded product |
| JP2013237719A (en) * | 2012-05-11 | 2013-11-28 | Nicca Chemical Co Ltd | Method of producing recycled polypropylene resin molded product |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4523208B2 (en) | 2010-08-11 |
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