JP2000167501A - Production of regenerated resin - Google Patents

Production of regenerated resin

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Publication number
JP2000167501A
JP2000167501A JP10342055A JP34205598A JP2000167501A JP 2000167501 A JP2000167501 A JP 2000167501A JP 10342055 A JP10342055 A JP 10342055A JP 34205598 A JP34205598 A JP 34205598A JP 2000167501 A JP2000167501 A JP 2000167501A
Authority
JP
Japan
Prior art keywords
resin
chamber
pieces
dry ice
ice particles
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
Application number
JP10342055A
Other languages
Japanese (ja)
Other versions
JP3729668B2 (en
Inventor
Manabu Shibata
学 柴田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kao Corp
Original Assignee
Kao Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kao Corp filed Critical Kao Corp
Priority to JP34205598A priority Critical patent/JP3729668B2/en
Publication of JP2000167501A publication Critical patent/JP2000167501A/en
Application granted granted Critical
Publication of JP3729668B2 publication Critical patent/JP3729668B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To produce a clean regenerated resin efficiently by removing dirt such as a label adherent to a used resin molding from the molding by crushing the molding into pieces and washing the pieces by making the fluidized pieces collide with dry ice particles. SOLUTION: In the production of a regenerated resin, used resin moldings, which were recovered and compressed into blocks, are separated individually, and foreign materials such as glass and metal are removed by gravity separation. Moreover, the moldings are sorted by the kinds of resins by a sorting machine. The sorted moldings are crushed by a crusher into flakes, which are dropped from the upper part introduction port 4 of a chamber 2 into the chamber 2. Simultaneously, dry ice particles are introduced from the lower part introduction port 5 of the chamber 2 and made to ascend in the chamber 2 and to collide with the fluidized rein pieces to remove impurities adherent to the pieces to obtain the clean rein pieces.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、内容物やラベル等
の汚れが付着した使用済み樹脂製成形体から汚れを除去
・分離して、清浄な再生樹脂を製造する方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a clean recycled resin by removing and separating dirt from a used resin molded article to which dirt such as contents and labels adhere.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】使用済
みのポリエチレンテレフタレート(以下、PETとい
う)製ボトル等の樹脂製成形体を回収・洗浄して再生樹
脂を製造する方法には、水洗により成形体の汚れを除去
するウエット方式及び金属製ピンとの衝突若しくは摩擦
により成形体の汚れを除去するドライ方式が知られてい
る。しかし、ウエット方式は、選別・分離工程が多いこ
とから効率を高くできず、また、ドライ方式は、その前
処理としてウェット方式による洗浄が必要であり、バッ
チ処理にて行われることから再生樹脂の製造価格が高く
なる。
2. Description of the Related Art A method for manufacturing a recycled resin by collecting and washing a used resin molded article such as a polyethylene terephthalate (hereinafter referred to as PET) bottle includes a method of forming a molded article by washing with water. There are known a wet method for removing stains on the body and a dry method for removing stains on the molded body by collision or friction with a metal pin. However, the wet method cannot achieve high efficiency due to the large number of sorting / separating steps, and the dry method requires washing by a wet method as a pre-treatment, and is performed in a batch process. The production price increases.

【0003】これらの方法とは別に、ドライアイス粒子
を被洗浄物に噴射する方法が知られている(特開昭61
−15749号公報、特開平5−318710号公報、
特開平6−182306号公報、特開平8−20226
9号公報、特開平10−13814号公報)。しかし、
これらの公報に記載の方法は、洗浄の対象が固定面で、
外部露出面であるので、樹脂製成形体のような比重の小
さな(軽量な)被洗浄物の洗浄には適していない。
In addition to these methods, a method of injecting dry ice particles onto an object to be cleaned has been known (Japanese Patent Laid-Open No. 61-1986).
-15749, JP-A-5-318710,
JP-A-6-182306, JP-A-8-20226
No. 9, JP-A-10-13814). But,
In the method described in these publications, the object to be cleaned is a fixed surface,
Since it is an externally exposed surface, it is not suitable for cleaning an object to be cleaned having a small specific gravity (light weight) such as a resin molded product.

【0004】従って、本発明は、内容物やラベル等の汚
れが付着した使用済み樹脂製成形体から汚れを除去・分
離して、清浄な再生樹脂を製造し得る方法を提供するこ
とを目的とする。
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method capable of removing and separating dirt from a used resin molded article to which dirt such as contents and labels adhere, thereby producing a clean regenerated resin. I do.

【0005】[0005]

【課題を解決するための手段】本発明は、使用済み樹脂
製成形体を破砕して樹脂片とした後、該樹脂片を流動状
態下にドライアイス粒子と衝突させて該樹脂片を洗浄
し、付着物が除去された清浄樹脂片とする再生樹脂の製
造方法を提供することにより上記目的を達成したもので
ある。
According to the present invention, a used resin molded article is crushed into a resin piece, and the resin piece is washed with the dry ice particles under a flowing state by colliding the resin piece with the dry ice particles. The above object has been achieved by providing a method for producing a reclaimed resin which is a clean resin piece from which deposits have been removed.

【0006】[0006]

【発明の実施の形態】以下、本発明の再生樹脂の製造方
法を、その好ましい実施形態に基づき図面を参照して説
明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for producing a recycled resin according to the present invention will be described based on preferred embodiments with reference to the drawings.

【0007】本実施形態の再生樹脂の製造方法は、
(1)前処理工程、(2)付着物の洗浄・分離工程及び
(3)後処理工程に大別される。
The method for producing a recycled resin according to the present embodiment is as follows.
It can be broadly divided into (1) a pretreatment step, (2) a step of washing and separating attached matter, and (3) a post-treatment step.

【0008】前処理工程では、先ず、回収後に圧縮され
て塊状となった使用済み樹脂製成形体を個々に分離す
る。この分離にはベール解体機等が用いられる。次い
で、ジェットエアを用いた重力選別によりガラスや金属
等の異物を除去する。更に、近赤外線センサーを備えた
分別装置により、使用済み樹脂製成形体に対し近赤外線
分光分析を行い該成形体を樹脂の種類毎に分別する。こ
の分別によって樹脂の再利用効率が向上する。樹脂の種
類毎に分別された使用済み樹脂製成形体は、必要に応じ
て更にその色毎に分別される。色毎の分別には可視光分
光分析が用いられる。このように分別された使用済み樹
脂製成形体をフレーク化破砕機によって破砕し、一辺が
約1〜10cmのフレーク状樹脂片となす。
[0008] In the pretreatment step, first, a used resin molded article which has been compressed and collected into a lump after recovery is individually separated. For this separation, a bale dismantling machine or the like is used. Next, foreign substances such as glass and metal are removed by gravity sorting using jet air. Further, the used resin molded product is subjected to near-infrared spectroscopy by a separation device equipped with a near-infrared sensor, and the molded product is classified for each type of resin. This separation improves the resin recycling efficiency. The used resin molded product separated for each type of resin is further separated for each color as needed. Visible light spectroscopy is used for color separation. The used resin molded product thus separated is crushed by a flake crusher to form a flake-shaped resin piece having a side of about 1 to 10 cm.

【0009】得られた樹脂片を、付着物の洗浄・分離工
程に付す。この洗浄・分離工程には図1に示す分離装置
1が用いられる。この分離装置1は、第1チャンバー2
及び第2チャンバー3から構成されている。第1チャン
バー2は上部導入口4、下部導入口5、上部取出口6及
び下部取出口7を有している。第2チャンバー3は、上
部導入口8、下部導入口9、上部取出口10及び下部取
出口11を有している。そして、第1チャンバー2の上
部取出口6と第2チャンバー3の上部導入口8とが連通
している。
The obtained resin pieces are subjected to a process of washing and separating attached substances. The separation apparatus 1 shown in FIG. 1 is used for this washing / separation step. This separation device 1 includes a first chamber 2
And the second chamber 3. The first chamber 2 has an upper inlet 4, a lower inlet 5, an upper outlet 6, and a lower outlet 7. The second chamber 3 has an upper inlet 8, a lower inlet 9, an upper outlet 10, and a lower outlet 11. The upper outlet 6 of the first chamber 2 and the upper inlet 8 of the second chamber 3 communicate with each other.

【0010】内容物やラベル等の付着物が付着した状態
の樹脂片は、第1チャンバー2の上部導入口4からベル
トコンベア等の搬送手段によって第1チャンバー2内に
導入され第1チャンバー2内を落下する。これと共に第
1チャンバー2の下部導入口5からドライアイス粒子が
搬送流体によってチャンバー内に導入されて、チャンバ
ー内を上昇する。そして、第1チャンバー2内におい
て、樹脂片を流動状態下にドライアイス粒子と対向・衝
突させて該樹脂片の表面に付着している付着物を分離・
除去する。これにより付着物が除去された清浄樹脂片が
得られる。この衝突はドライアイスの存在下に低温下で
行われるから、樹脂片に接着剤を介してラベルが貼付さ
れている場合には、該接着剤がそのガラス転移点以下の
状態となり粘性を失うので樹脂片とラベル及び接着剤と
の分離・除去が容易に行える。その上、内容物として通
常除去が容易でない高粘度の液体が樹脂片に付着してい
る場合であっても、該液体が固化するのでやはり分離・
除去が容易に行える。
[0010] The resin pieces to which the attached matter such as the contents and the labels are attached are introduced into the first chamber 2 from the upper introduction port 4 of the first chamber 2 by a conveying means such as a belt conveyor, and are introduced into the first chamber 2. To fall. At the same time, dry ice particles are introduced into the chamber by the carrier fluid from the lower inlet 5 of the first chamber 2, and rise in the chamber. Then, in the first chamber 2, the resin pieces are opposed to and collide with the dry ice particles in a flowing state to separate the deposits adhering to the surface of the resin pieces.
Remove. As a result, a clean resin piece from which deposits have been removed is obtained. Since this collision is performed at a low temperature in the presence of dry ice, when a label is affixed to the resin piece via an adhesive, the adhesive becomes a state below its glass transition point and loses viscosity. Separation and removal of the resin piece from the label and the adhesive can be easily performed. In addition, even when a high-viscosity liquid that is not easily removed as a content is attached to the resin piece, the liquid is solidified, so that the separation /
Removal is easy.

【0011】清浄樹脂片は、重力による終端沈降速度
と、下部導入口5からチャンバー上方に向かう搬送流体
の速度とのバランスによって、第1チャンバー2内を沈
降し、第1チャンバー2の下部取出口7から排出・回収
される。一方、樹脂片から分離された付着物は、搬送流
体によって搬送されて第1チャンバー2内を上昇し、第
1チャンバー2の上部取出口6から排出され、該上部取
出口6と連通する第2チャンバー3の上部導入口8を通
じて第2チャンバー3内に導入される。そして付着物
は、第2チャンバー3において更に種類毎に分離されて
回収される。このようにして、付着物が付着した状態の
樹脂片が清浄樹脂片と付着物とに極めて高い分離度にて
分離され、個別に回収される。
The clean resin pieces settle down in the first chamber 2 by the balance between the terminal sedimentation speed due to gravity and the speed of the carrier fluid flowing upward from the lower inlet 5 to the upper part of the chamber, and the lower outlet of the first chamber 2 is taken out. It is discharged and collected from 7. On the other hand, the adhered matter separated from the resin pieces is transported by the transport fluid and rises in the first chamber 2, is discharged from the upper outlet 6 of the first chamber 2, and communicates with the upper outlet 6. It is introduced into the second chamber 3 through the upper inlet 8 of the chamber 3. The attached matter is further separated and collected in the second chamber 3 for each type. In this way, the resin pieces on which the deposits have adhered are separated into the clean resin pieces and the deposits with an extremely high degree of separation, and are individually collected.

【0012】ドライアイス粒子の搬送に用いられる搬送
流体としては、樹脂片の洗浄に悪影響を及ぼさないもの
であればその種類に特に制限は無いが、取り扱い性や経
済性の点から空気を用いることが好ましい。また、ドラ
イアイス粒子の大きさは、搬送中に一部が気化しても樹
脂片の洗浄ができ、搬送流体で搬送可能である点から1
00〜5000μm、特に150〜1000μmである
ことが好ましい。このようなドライアイス粒子は、例え
ば上述した特開平6−182306号公報の第4欄7〜
16行に記載の方法によって得ることができる。
The carrier fluid used for carrying the dry ice particles is not particularly limited as long as it does not adversely affect the cleaning of the resin pieces. However, air should be used from the viewpoint of handleability and economy. Is preferred. In addition, the size of the dry ice particles is 1 point because the resin pieces can be washed even if a part of the particles evaporate during the transfer and can be transferred by the transfer fluid.
It is preferably from 00 to 5000 μm, particularly preferably from 150 to 1000 μm. Such dry ice particles are described, for example, in the above-mentioned JP-A-6-182306, column 4, 7-.
It can be obtained by the method described in line 16.

【0013】第1チャンバー2内に導入されるドライア
イス粒子及び搬送流体の全圧は、低過ぎると樹脂片から
剥がれたラベル片等の付着物又はドライアイス粒子自体
も落下してしまい、また高過ぎると樹脂片を第1チャン
バー2内に導入させにくい点から、0.05〜0.8M
Pa[gage]、特に0.1〜0.5MPa[gage]であるこ
とが好ましい。ドライアイス粒子の第1チャンバー2内
への導入量は、処理される樹脂片の量との関係で、樹脂
片10kg/hに対して、0.1〜10kg/h、特に
0.3〜5kg/hであることが好ましい。
If the total pressure of the dry ice particles and the carrier fluid introduced into the first chamber 2 is too low, the deposits such as the label pieces peeled off from the resin pieces or the dry ice particles themselves fall and become high. Since it is difficult to introduce the resin piece into the first chamber 2 after the
Pa [gage], particularly preferably 0.1 to 0.5 MPa [gage]. The amount of dry ice particles introduced into the first chamber 2 is 0.1 to 10 kg / h, particularly 0.3 to 5 kg, per 10 kg / h of the resin piece in relation to the amount of the resin piece to be treated. / H.

【0014】第2チャンバー3においては、上述の通り
その上部導入口8を通じて第1チャンバー2において分
離された付着物が導入される。これと共に第2チャンバ
ー3の下部導入口9からドライアイス粒子が搬送流体に
よってチャンバー内に導入され、チャンバー内を上昇す
る。そして、第2チャンバー3内において、付着物を流
動状態下にドライアイス粒子と対向・衝突させて該付着
物をラベル片とその他の汚れ成分(例えば液体合成洗剤
等)とに分離する。
In the second chamber 3, the deposits separated in the first chamber 2 are introduced through the upper inlet 8 as described above. At the same time, dry ice particles are introduced into the chamber by the carrier fluid from the lower inlet 9 of the second chamber 3 and rise in the chamber. Then, in the second chamber 3, the attached matter is caused to face and collide with the dry ice particles in a flowing state to separate the attached matter into a label piece and another contaminant component (for example, a liquid synthetic detergent).

【0015】分離されたラベル片は、重力による終端沈
降速度と、下部導入口9からチャンバー上方に向かう搬
送流体の速度とのバランスによって、第2チャンバー3
内を沈降し、第2チャンバー3の下部取出口11から排
出・回収される。一方、ラベル片と分離したその他の汚
れ成分は、第2チャンバー3内を上昇し、第2チャンバ
ー3の上部取出口10から排出・回収される。このよう
にして、樹脂片に付着していた付着物は、第2チャンバ
ー3において、その種類毎に細かく分離されて個別に回
収される。
The separated label pieces are separated by the balance between the terminal sedimentation velocity due to gravity and the velocity of the carrier fluid flowing upward from the lower inlet 9 into the second chamber 3.
The inside of the second chamber 3 is settled and discharged and collected from the lower outlet 11 of the second chamber 3. On the other hand, other dirt components separated from the label pieces rise in the second chamber 3 and are discharged and collected from the upper outlet 10 of the second chamber 3. In this way, the deposits that have adhered to the resin pieces are finely separated for each type in the second chamber 3 and individually collected.

【0016】第2チャンバー3の下部取出口11から取
り出されたラベル片は、その他の汚れ成分から分離され
た清浄なものなので、これを回収してリサイクルするこ
とができる。その結果、使用済み樹脂製成形体のリサイ
クル率が一層高まる。また、第2チャンバー3の上部取
出口10から排出されるドライアイスの粒子は、昇華し
て気体となった後回収され、冷却されて再びドライアイ
スの粒子となる。従って、上述したウエット方式やドラ
イ方式による樹脂製成形体の洗浄方法と異なり、本実施
形態の方法は閉じた系で洗浄できるという利点もある。
更に、ドライアイスの昇華は自発的に起こるので、他に
特別な操作をすることなく最終的な汚れ成分が残るとい
う利点もある。
Since the label pieces taken out from the lower outlet 11 of the second chamber 3 are clean and separated from other contaminants, they can be collected and recycled. As a result, the recycling rate of the used resin molded article is further increased. The dry ice particles discharged from the upper outlet 10 of the second chamber 3 are sublimated and recovered as a gas after being cooled, and then cooled again to become dry ice particles. Therefore, unlike the above-described method of cleaning a resin molded article by a wet method or a dry method, the method of the present embodiment also has an advantage that it can be cleaned in a closed system.
Furthermore, since sublimation of dry ice occurs spontaneously, there is an advantage that the final stain component remains without any special operation.

【0017】第2チャンバー3におけるドライアイス粒
子の搬送に用いられる搬送流体としては、第1チャンバ
ー2で用いられるものと同様のものを用いることができ
る。また、ドライアイス粒子の大きさも第1チャンバー
2で用いられるものと同様とすることができる。
As the transport fluid used for transporting the dry ice particles in the second chamber 3, the same fluid as that used in the first chamber 2 can be used. Further, the size of the dry ice particles can be the same as that used in the first chamber 2.

【0018】第2チャンバー3内に導入されるドライア
イス粒子及び搬送流体の全圧は、第1チャンバー2の場
合より一般に低くすることができ、0.001〜0.1
MPa[gage]、特に0.01〜0.1MPa[gage]であ
ることが好ましい。ドライアイス粒子の第2チャンバー
3内への導入量は、第1チャンバー2内へ導入される樹
脂片における付着物の量との関係で、付着物10kg/
hに対して、0.01〜1kg/h、特に0.03〜
0.5kg/hであることが好ましい。
The total pressure of the dry ice particles and the carrier fluid introduced into the second chamber 3 can be generally lower than in the case of the first chamber 2 and is between 0.001 and 0.1.
It is preferably MPa [gage], particularly preferably 0.01 to 0.1 MPa [gage]. The amount of the dry ice particles introduced into the second chamber 3 is 10 kg / adhered matter in relation to the amount of the adhering matter in the resin piece introduced into the first chamber 2.
h, 0.01 to 1 kg / h, particularly 0.03 to
It is preferably 0.5 kg / h.

【0019】後処理工程においては、再生樹脂としての
清浄樹脂片がペレット化ないし圧密化されて、新たな樹
脂製品の原料樹脂として供される。
In the post-treatment step, a clean resin piece as a reclaimed resin is pelletized or consolidated and used as a raw material resin for a new resin product.

【0020】以上、本発明の再生樹脂の製造方法をその
好ましい実施形態に基づき説明したが、本発明は上記実
施形態に制限されず種々の変更が可能である。例えば、
上記実施形態は、破砕により得られた樹脂片を連続的に
洗浄して再生樹脂を得る、いわゆる連続式の方法である
が、これに代えていわゆるバッチ式の方法を用いてもよ
い。バッチ式の方法では、破砕により得られた樹脂片を
ドライアイスの粒子と共に回分槽に充填し攪拌すること
で、該樹脂片を流動状態下に該ドライアイスの粒子と衝
突させて該樹脂片を洗浄し、付着物が除去された清浄樹
脂片を得る。また、上記実施形態の分離装置はチャンバ
ーを2個備えたものであるが、これに代えて1個のみの
チャンバーを備えたものを用いてもよく、或いは分別物
の数に応じて3個以上のチャンバーを備えたものを用い
てもよい。また、後処理工程における清浄樹脂片のペレ
ット化ないし圧密化を行わず、そのままの状態で再生樹
脂として使用してもよい。また、使用済み樹脂製成形体
にキャップ等が取り付けられている場合には、前処理工
程における該成形体の破砕前に、該成形体から該キャッ
プ等を分離する工程を行ってもよい。
Although the method for producing a recycled resin according to the present invention has been described based on the preferred embodiment, the present invention is not limited to the above embodiment, and various modifications can be made. For example,
The above embodiment is a so-called continuous method in which a resin piece obtained by crushing is continuously washed to obtain a regenerated resin, but a so-called batch method may be used instead. In the batch method, the resin pieces obtained by the crushing are charged into a batch tank together with the dry ice particles and stirred, so that the resin pieces collide with the dry ice particles under a fluidized state, and the resin pieces are crushed. Washing is performed to obtain a clean resin piece from which deposits have been removed. Further, the separation apparatus of the above embodiment has two chambers, but instead of this, one having only one chamber may be used, or three or more chambers may be used according to the number of separated materials. May be used. Further, the clean resin piece may be used as a recycled resin as it is without pelletizing or consolidating in the post-treatment step. Further, when a cap or the like is attached to the used resin molded body, a step of separating the cap or the like from the molded body may be performed before the molded body is crushed in the pretreatment step.

【0021】〔実施例1〕使用済みPETボトル容器と
して、前以てャップをはずした状態のファミリーフレッ
シュコンパクト〔花王(株)製の洗剤の商品名〕の容器
を準備した。この容器を3〜4cm角のフレーク状に破
砕し、フレーク状樹脂片とした。このフレーク状樹脂片
には内容物の残りは勿論のこと、容器に接着されている
ラベルも付着している。そして、図1に示す分離装置を
用い下記運転条件にて再生樹脂を製造した。
Example 1 As a used PET bottle container, a container of Family Fresh Compact [trade name of a detergent manufactured by Kao Corporation] without a cap was prepared. This container was crushed into flakes of 3 to 4 cm square to obtain flake-shaped resin pieces. The flake-shaped resin piece has not only the remaining contents but also a label adhered to the container. Then, a recycled resin was produced using the separation apparatus shown in FIG. 1 under the following operating conditions.

【0022】得られた再生樹脂の洗浄度の評価として、
洗浄前の樹脂片、及び第1チャンバーの下部取出口から
得られた樹脂片それぞれ10ヶを1〜2cm角に切断
し、100mlの水道水の入った蓋付ガラスビンにそれ
ぞれ入れ、手で30秒間激しく振動を与え10秒後の泡
立ち量を測定した。また、分離度の評価として、第1チ
ャンバーの下部取出口、第2チャンバーの下部取出口、
及び第2チャンバーの上部取出口からそれぞれ得られた
目的物の個数とその他の固形物との比を求めた。これら
の結果を下記に示す。
As an evaluation of the degree of washing of the obtained regenerated resin,
10 pieces of resin pieces before washing and 10 pieces of resin pieces obtained from the lower outlet of the first chamber were cut into 1 to 2 cm squares, put into glass bottles with lids containing 100 ml of tap water, and manually placed for 30 seconds. Vigorous vibration was applied and the foaming amount after 10 seconds was measured. As the evaluation of the degree of separation, the lower outlet of the first chamber, the lower outlet of the second chamber,
The ratio between the number of the target products obtained from the upper outlet of the second chamber and the other solids was determined. The results are shown below.

【0023】〔運転条件〕 ・フレーク状樹脂片供給量:10kg/hr ・ドライアイス粒子の大きさ(平均);520μm ・搬送流体;空気 <第1チャンバー> ・ドライアイス粒子及び搬送流体の全圧;0.3MPa
[gage] ・ドライアイス粒子導入量;3kg/hr <第2チャンバー> ・ドライアイス粒子及び搬送流体の全圧;0.04MP
a[gage] ・ドライアイス粒子導入量;0.1kg/hr
[Operating conditions] ・ Supply amount of flake-shaped resin pieces: 10 kg / hr ・ Size of dry ice particles (average); 520 μm ・ Transport fluid; air <First chamber> ・ Total pressure of dry ice particles and transport fluid ; 0.3 MPa
[gage] ・ Amount of dry ice particles introduced; 3 kg / hr <Second chamber> ・ Total pressure of dry ice particles and carrier fluid; 0.04MP
a [gage] ・ Introduction amount of dry ice particles; 0.1 kg / hr

【0024】〔結果〕 <洗浄度評価(泡立ち量)> ・洗浄前の樹脂片;14cm3 ・第1チャンバーの下部取出口から得られた樹脂片;0
cm3 <分離度評価> ・第1チャンバーの下部取出口;(ラベル片+ラベル付
き樹脂片)/ラベルなし樹脂片=13ヶ/3897ヶ ・第2チャンバーの下部取出口;(ラベル付き樹脂片+
ラベルなし樹脂片)/ラベル片=14ヶ/1581ヶ ・第2チャンバーの上部取出口;(ラベル片+ラベル付
き樹脂片+ラベルなし樹脂片)=13ヶ
[Results] <Evaluation of Detergency (Amount of foaming)> Resin pieces before washing; 14 cm 3 Resin pieces obtained from the lower outlet of the first chamber; 0
cm 3 <Evaluation of the degree of separation> ・ Lower outlet of the first chamber; (label piece + resin piece with a label) / resin piece without label = 13/3897 ・ Lower outlet of the second chamber; (resin piece with a label) +
・ Label piece without label) / Label piece = 14/1581 ・ Top outlet of the second chamber; (Label piece + Labeled resin piece + Unlabeled resin piece) = 13

【0025】上記の結果から明らかなように、第1チャ
ンバーの下部取出口から得られた樹脂片には洗剤の付着
が無く、清浄なものであることが判る。更に、分離装置
における各取出部からは、目的物が極めて高い分離度で
得られることが判る。
As is clear from the above results, it is clear that the resin pieces obtained from the lower outlet of the first chamber are clean with no detergent attached thereto. Furthermore, it can be seen that the target product can be obtained with an extremely high degree of separation from each of the extraction sections in the separation device.

【0026】[0026]

【発明の効果】本発明によれば、内容物やラベル等の汚
れが付着した使用済み樹脂製成形体から汚れを除去・分
離して、清浄な再生樹脂を容易に製造し得る方法が提供
される。本発明の方法によれば、極めて清浄な再生樹脂
を高い分離度にて得ることができる。本発明の方法は、
特に、通常除去が容易でない高粘度の液体等が付着した
使用済み樹脂製容器から再生樹脂を製造する場合に効果
的である。
According to the present invention, there is provided a method for easily producing a clean reclaimed resin by removing and separating dirt from a used resin molded article to which dirt such as contents and labels are adhered. You. According to the method of the present invention, an extremely clean regenerated resin can be obtained with a high degree of separation. The method of the present invention comprises:
In particular, it is effective when a recycled resin is manufactured from a used resin container to which a high-viscosity liquid or the like, which is usually not easily removed, adheres.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明の再生樹脂の製造方法に好ましく用い
られる分離装置を示す模式図である。
FIG. 1 is a schematic view showing a separation apparatus preferably used in a method for producing a recycled resin of the present invention.

【符号の説明】[Explanation of symbols]

1 分離装置 2 第1チャンバー 3 第2チャンバー DESCRIPTION OF SYMBOLS 1 Separation apparatus 2 1st chamber 3 2nd chamber

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 使用済み樹脂製成形体を破砕して樹脂片
とした後、該樹脂片を流動状態下にドライアイス粒子と
衝突させて該樹脂片を洗浄し、付着物が除去された清浄
樹脂片とする再生樹脂の製造方法。
1. A used resin molded body is crushed into resin pieces, and the resin pieces are collided with dry ice particles in a flowing state to wash the resin pieces to remove the adhered substances. A method for producing a recycled resin as a resin piece.
【請求項2】 搬送流体によって搬送されてきた上記ド
ライアイス粒子を上記樹脂片と衝突させて、該樹脂片か
ら付着物を除去して上記清浄樹脂片とすると共に除去さ
れた該付着物と該清浄樹脂片とをそれぞれ分離し個別に
回収する請求項1記載の再生樹脂の製造方法。
2. The method according to claim 1, wherein the dry ice particles conveyed by the carrier fluid collide with the resin pieces to remove deposits from the resin pieces to form the clean resin pieces. The method for producing a recycled resin according to claim 1, wherein the clean resin pieces are separated and individually collected.
【請求項3】 上部導入口、下部導入口、上部取出口及
び下部取出口を有するチャンバーを備えた分離装置を用
い、上部導入口より上記樹脂片を導入すると共に下部導
入口より上記ドライアイス粒子を上記搬送流体によって
搬送・導入して、上記チャンバー内において該樹脂片を
該ドライアイス粒子と衝突させて、該樹脂片から付着物
を除去して上記清浄樹脂片とし、除去された該付着物を
上記搬送流体によって搬送して上部取出口から取り出す
共に該清浄樹脂片を下部取出口から取り出して、該付着
物と該清浄樹脂片とをそれぞれ個別に回収する請求項2
記載の再生樹脂の製造方法。
3. A separating apparatus having a chamber having an upper inlet, a lower inlet, an upper outlet and a lower outlet, wherein the resin piece is introduced from the upper inlet and the dry ice particles are introduced from the lower inlet. Is transported and introduced by the transport fluid, and the resin pieces are caused to collide with the dry ice particles in the chamber to remove the deposits from the resin pieces to form the clean resin pieces. 3. The cleaning fluid is conveyed by the carrier fluid and taken out from the upper outlet, and the clean resin piece is taken out from the lower outlet to collect the attached matter and the clean resin piece individually.
A method for producing the recycled resin according to the above.
JP34205598A 1998-12-01 1998-12-01 Manufacturing method of recycled resin Expired - Fee Related JP3729668B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34205598A JP3729668B2 (en) 1998-12-01 1998-12-01 Manufacturing method of recycled resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34205598A JP3729668B2 (en) 1998-12-01 1998-12-01 Manufacturing method of recycled resin

Publications (2)

Publication Number Publication Date
JP2000167501A true JP2000167501A (en) 2000-06-20
JP3729668B2 JP3729668B2 (en) 2005-12-21

Family

ID=18350813

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34205598A Expired - Fee Related JP3729668B2 (en) 1998-12-01 1998-12-01 Manufacturing method of recycled resin

Country Status (1)

Country Link
JP (1) JP3729668B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006181494A (en) * 2004-12-28 2006-07-13 Heiwa Corp Cleaning device of recycled resin

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006181494A (en) * 2004-12-28 2006-07-13 Heiwa Corp Cleaning device of recycled resin
JP4509767B2 (en) * 2004-12-28 2010-07-21 株式会社平和 Cleaning equipment for recycled resin

Also Published As

Publication number Publication date
JP3729668B2 (en) 2005-12-21

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