JP3144660B2 - Method for peeling polyurethane foam composite - Google Patents
Method for peeling polyurethane foam compositeInfo
- Publication number
- JP3144660B2 JP3144660B2 JP1013093A JP1013093A JP3144660B2 JP 3144660 B2 JP3144660 B2 JP 3144660B2 JP 1013093 A JP1013093 A JP 1013093A JP 1013093 A JP1013093 A JP 1013093A JP 3144660 B2 JP3144660 B2 JP 3144660B2
- Authority
- JP
- Japan
- Prior art keywords
- polyurethane foam
- treatment
- minutes
- peeling
- sample
- 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
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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ポリウレタン発泡複合
体の廃品において、ポリウレタン発泡体から積層部を分
離してそれぞれの素材として再利用するためのポリウレ
タン発泡複合体の剥離方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of separating a polyurethane foam composite from waste polyurethane foam composites for separating a laminated portion from the polyurethane foam and reusing them as respective materials.
【０００２】[0002]
【従来の技術】従来、ポリウレタン樹脂の廃品は、分解
してそのモノマー成分に回収する方法が種々提案されて
いる（たとえば特開昭４９−９０３７７号公報、特開昭
４９−２８７９号公報、特開昭５７−８０４３８号公報
など）。これらはポリウレタン樹脂を高温・高圧下で水
蒸気により分解して、構成成分のアミン化合物およびア
ルコール化合物に再生回収するものである。ところが、
ポリウレタン樹脂に他の樹脂や金属などが接合されたポ
リウレタン発泡複合体から、それぞれの材料を分離・回
収して再生する方法は知られていない。2. Description of the Related Art Hitherto, various methods have been proposed for decomposing polyurethane resin waste and recovering it as a monomer component (for example, JP-A-49-90377, JP-A-49-2879, No. 57-80438). These are those in which a polyurethane resin is decomposed by steam under high temperature and high pressure to regenerate and recover the constituent amine compound and alcohol compound. However,
There is no known method for separating and recovering each material from a polyurethane foam composite in which another resin, metal, or the like is bonded to a polyurethane resin, and regenerating the materials.
【０００３】ポリウレタン発泡複合体の例としては自動
車の計器盤がある。この自動車の計器盤（インストルメ
ントパネルと呼ばれる）は、ポリウレタン発泡体の表面
側に塩化ビニルレザーシートが接合され、裏面にはガラ
ス繊維強化アクリロニトリルスチレン樹脂（以下ＡＳー
Ｇという）が接合補強されて構成されている。この成形
体の廃品は、大形の成形体であり接合された各樹脂層の
分離が難しいため、そのまま、あるいは粗粉砕して埋め
立てているのが現状である。これを再生、再利用する場
合には、ポリウレタン発泡体から他の積層樹脂成分の分
離が十分おこなえないので、再生樹脂には他の成分が混
在した状態で再溶融されることとなり、品質が低下した
再生成形材料となるという問題がある。[0003] An example of a polyurethane foam composite is an instrument panel of an automobile. The instrument panel (called an instrument panel) of this automobile is formed by bonding a polyvinyl chloride leather sheet to the front side of a polyurethane foam and bonding and reinforcing glass fiber reinforced acrylonitrile styrene resin (hereinafter, AS-G) to the back side. It is configured. The waste of this molded product is a large-sized molded product, and it is difficult to separate the joined resin layers. Therefore, at present, the waste product is buried as it is or roughly ground. When this is recycled and reused, the other laminated resin components cannot be separated sufficiently from the polyurethane foam, so that the recycled resin is re-melted in a state where other components are mixed, resulting in lower quality. There is a problem that the recycled molding material is used.
【０００４】そこで、接合された積層部の界面や層間物
質を溶剤で溶かしたり、表面層を削りとるなどにより分
離して再生する方法が考えられるが、これらの方法は作
業性が悪く、しかも不完全となるなど実用的ではない。[0004] In order to solve this problem, there are conceivable methods of regenerating the interface by dissolving the interface or the interlayer material of the joined laminated portions with a solvent or by scraping off the surface layer. However, these methods have poor workability and are inefficient. It is not practical such as being perfect.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記の事情に
鑑みてなされたもので、ポリウレタン発泡複合体に接合
されている各接合部材を、それぞれ容易にかつ完全に分
離し、分離した各材質はそのまま再利用できる素材とす
ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and easily and completely separates each joining member joined to the polyurethane foam composite, and separates each of the separated materials. Is intended to be a material that can be reused as it is.
【０００６】[0006]
【課題を解決するための手段】本発明のポリウレタン発
泡複合体の剥離方法は、ポリウレタン発泡体と少なくと
もその一面に接合された樹脂、シート、または金属板で
構成された接合部材が接合されたポリウレタン発泡複合
体からポリウレタン発泡体を剥離する方法であって、 該ポリウレタン発泡複合体を閉空間中で水を主成分をす
る処理液中で１２０℃〜１８０℃の温度で加熱処理し
て、該ポリウレタン発泡複合体からポリウレタン発泡体
を剥離することを特徴とする。Peeling a polyurethane foam composite of the present invention According to an aspect of a resin bonded to at least one surface thereof with a polyurethane foam, a sheet or a metal plate,
A method for peeling a polyurethane foam from a polyurethane foam composite to which a formed joining member is bonded, comprising: removing the polyurethane foam composite in a closed space in a treatment liquid containing water as a main component at 120 ° C to 180 ° C. The polyurethane foam is peeled from the polyurethane foam composite by heat treatment at a temperature of 1.
【０００７】本発明のポリウレタン発泡複合体の剥離方
法は、ポリウレタン発泡複合体が、水を主成分とする処
理液中で、加圧下に加熱されポリウレタン発泡体からポ
リウレタン発泡体を剥離させる方法である。この剥離方
法において、処理液が水の場合には、１２０℃〜１８０
℃、５０分〜８０分の範囲内で処理をおこなうのが好ま
しい。処理温度が１２０℃未満であると剥離の進行が遅
く時間がかかるので好ましくない。また処理温度が１８
０℃を超えるとポリウレタン発泡体が分解ないしは変質
しやすくなるので好ましくない。[0007] peeling method of the polyurethane foam composite of the present invention, port polyurethane foam complex, the water treatment solution whose main component is heated under pressure from the polyurethane foam
This is a method of peeling the urethane foam . In this stripping method, when the treatment liquid is water, 120 ° C. to 180
° C., preferable to perform the treatment at 50 minutes to 80 minutes within range
New If the treatment temperature is lower than 120 ° C., the progress of peeling is slow and it takes time, which is not preferable. The processing temperature is 18
If the temperature exceeds 0 ° C., the polyurethane foam tends to be decomposed or deteriorated, which is not preferable.
【０００８】処理液がポリウレタン発泡体に浸透し易い
アルコール成分を水に添加混合した場合には、１１０℃
〜１６０℃で４０分〜６０分の範囲内で処理をおこなう
のが好ましい。この場合は、樹脂に対してより浸透性に
富むアルコール成分による樹脂の変質を防ぐため、水単
独の場合より処理温度を下げて短時間の処理とするのが
好ましい。さらに、処理液にポリウレタンの分離促進性
物質のアルカリを含む水を使用する場合は、ポリウレタ
ン発泡体の変質を防止するためにアルコールで希釈して
処理液とする。この場合も処理条件は上記の場合より温
和として１００℃〜１５０℃で２０分〜４０分の範囲内
で処理をおこなうのが好ましい。これより条件が厳しく
なると、ポリウレタン発泡体が分解して、積層部にポリ
ウレタンの分解物が固着して剥離が困難となるので好ま
しくない。When an alcohol component which is easy to penetrate into a polyurethane foam is added to water and mixed with water, a temperature of 110 ° C.
Performs processing in 40 minutes to 60 minutes within range at to 160 ° C.
Is preferred . In this case, in order to prevent deterioration of the resin due to an alcohol component having higher permeability to the resin, it is preferable to perform the treatment in a shorter time by lowering the treatment temperature than in the case of using water alone. Further, in the case where water containing alkali as a polyurethane separation accelerating substance is used for the treatment liquid, the treatment liquid is diluted with alcohol to prevent deterioration of the polyurethane foam. Also in this case, it is preferable to perform the treatment at a temperature of 100 ° C. to 150 ° C. in a range of 20 minutes to 40 minutes , which is milder than the above case. If the conditions are stricter than this, the polyurethane foam is decomposed, and the decomposed product of polyurethane adheres to the laminated portion, making it difficult to peel off.
【０００９】この剥離方法では処理液が閉空間内で加熱
され、ポリウレタン発泡複合体の接合界面に存在する微
小な空隙から浸透して、界面の接着力を弱めて接合部材
の界面剥離を促進する。このため、各成形体を構成して
いる材料は変質することなく各接合部材毎に剥離でき
る。そして、分離された接合部材はそのまま再生用素材
として利用することができる。In this stripping method, the treatment liquid is heated in a closed space, penetrates through minute voids existing at the bonding interface of the polyurethane foam composite, weakens the adhesive force of the interface, and reduces the interface of the bonding member. Promotes peeling. For this reason, the material constituting each compact can be peeled off for each joining member without deterioration. The separated joining member can be used as it is as a material for reproduction.
【００１０】これら分離した接合部材の塩化ビニルおよ
びＡＳ−Ｇを再溶融してそれぞれ成形体に成形して力学
特性を評価したところ、その物性値に変化が認められな
かった。さらに塩化ビニル樹脂が材質変化なく分離・再
生したことを確認するため重合度、可塑剤量、ゲル分率
を測定したところ、本発明の剥離方法の前後に物性値の
変化はなかった。また、接合部材を剥離したポリウレタ
ン発泡体は、そのままの状態で緩衝材として再利用が可
能である。[0010] When vinyl chloride and AS-G of these separated joining members were re-melted and formed into molded articles, and the mechanical properties were evaluated, no change was found in the physical property values. Further, the degree of polymerization, the amount of the plasticizer, and the gel fraction were measured to confirm that the vinyl chloride resin was separated and regenerated without any change in the material. As a result, there was no change in the physical properties before and after the peeling method of the present invention. Further, the polyurethane foam from which the joining member has been peeled can be reused as a cushioning material as it is.
【００１１】剥離した素材が再利用できるためには、剥
離の処理条件を上記の範囲に管理することが必要であ
る。なお、この剥離方法は、ポリウレタン発泡体に接合
された材料が樹脂のみでなく金属の場合にも適用可能で
ある。これはポリウレタン発泡体側の界面から処理液が
浸透して界面での接着力を弱め、剥離を促進することが
できるからである。In order for the peeled material to be reused, it is necessary to control the peeling processing conditions within the above range. This peeling method can be applied to a case where the material joined to the polyurethane foam is not only a resin but also a metal. This is because the treatment liquid permeates from the interface on the polyurethane foam side, weakens the adhesive force at the interface, and promotes peeling.
【００１２】[0012]
【作用】ポリウレタン発泡複合体の自動車用計器盤を成
形する際は、骨材のＡＳ−Ｇと表皮の塩化ビニルレザー
シートの間に未硬化のポリウレタン樹脂を注入し骨材と
表皮の間でポリウレタン樹脂を発泡・硬化させる。この
時ポリウレタン樹脂は発泡して骨材と表皮に接触し、界
面では両者が接着するが、その接着力はポリウレタン発
泡体のウレタン結合の化学的結合力に比べて小さい力
（ファンデルワールス力）である。また、ポリウレタン
発泡複合体の界面は、成形時に発生した発泡ガスのため
若干の空隙が存在している。When molding an automotive instrument panel of a polyurethane foam composite, an uncured polyurethane resin is injected between the aggregate AS-G and the vinyl chloride leather sheet of the skin, and the polyurethane is spread between the aggregate and the skin. Foam and harden the resin. At this time, the polyurethane resin foams and comes into contact with the aggregate and the skin, and the two adhere at the interface. The adhesive force is smaller than the chemical bonding force of the urethane bond of the polyurethane foam (van der Waals force). It is. In addition, some voids exist at the interface of the polyurethane foam composite due to the foaming gas generated during molding.
【００１３】本発明の方法によれば、ポリウレタン発泡
複合体に閉空間内で加熱された処理液の蒸気が、上記の
ポリウレタン発泡体とＡＳ−Ｇとの界面およびポリウレ
タン発泡体と塩化ビニルレザーシートの界面に存在する
若干の空隙に沿って侵入し、界面の接着力を弱め両者を
剥離する。処理液の蒸気は界面の剥離とともに更に界面
の奥へと侵入し、ついには骨材側、表皮側ともにポリウ
レタン発泡体から剥離して分離するに至る。According to the method of the present invention, the vapor of the treatment liquid heated in the closed space of the polyurethane foam composite is applied to the interface between the polyurethane foam and AS-G and the polyurethane foam and the vinyl chloride leather sheet. Penetrates along some voids existing at the interface, weakens the adhesive force at the interface and separates both. The vapor of the treatment liquid further penetrates into the interface as the interface separates, and eventually separates from the polyurethane foam on both the aggregate side and the skin side.
【００１４】したがって、界面で他の樹脂成分などを残
すことなく接合部材を剥離・分離したポリウレタン発泡
体を得ることができる。しかも、ポリウレタン発泡体お
よび各接合部材は、条件が温和であるので変質すること
なく容易に剥離・分離することができる。Therefore, it is possible to obtain a polyurethane foam in which the joining member is separated and separated without leaving other resin components at the interface. In addition, the polyurethane foam and each joining member can be easily separated and separated without deterioration because the condition is mild.
【００１５】[0015]
【実施例】以下実施例により具体的に説明する。試料と
して使用したポリウレタン発泡複合体は、自動車用計器
盤の廃品である。この自動車用計器盤は、塩化ビニルレ
ザーシート、ポリウレタン発泡体、ガラス繊維強化アク
リロニトリルスチレン樹脂（ＡＳ−Ｇ）の各層（ここで
層は本発明の接合部材に該当する。）で構成されてい
る。この廃品を、約５×２０ｃｍ角に切断して本実施例
の試料として、以下の各処理条件で剥離をおこなった。The present invention will be described more specifically with reference to the following examples. The polyurethane foam composite used as a sample is a discarded automobile instrument panel. This instrument panel for automobiles is made of a vinyl chloride leather sheet, polyurethane foam, and glass fiber reinforced acrylonitrile styrene resin (AS-G) layers (here, AS-G).
The layer corresponds to the joining member of the present invention. ) . This waste product was cut into a square of about 5 × 20 cm, and peeled off as a sample of this example under the following processing conditions.
【００１６】[0016]
【表１】 注：３層分離の判定基準は目視にて、塩化ビニル層また
はＡＳ−Ｇ層にポリウレタン発泡体が付着していないも
のを分離、付着していたものを非分離とした。 （実施例）上記の試料を、表１に示す各条件で処理して
ポリウレタン発泡体から塩化ビニルレザーシートおよび
ＡＳ−Ｇの剥離状況を調べた。[Table 1] Note: The criterion for the three-layer separation was to visually determine that the polyurethane foam was not adhered to the vinyl chloride layer or AS-G layer, and that the adhered polyurethane foam was not separated. (Example) The above samples were treated under the conditions shown in Table 1 and the state of peeling of the vinyl chloride leather sheet and AS-G from the polyurethane foam was examined.
【００１７】Ｎｏ１は切断試料多数をオートクレーブ中
で水に浸漬し、１５０℃で４．９気圧の加圧下で６０分
間処理した。処理後オートクレーブより試料を取り出し
たところ塩化ビニルレザーシートおよびＡＳ−Ｇはポリ
ウレタン発泡体から完全に分離できた。得られたポリウ
レタン発泡体はほとんど分解を受けておらず、発泡体の
原形を保っていた。For No. 1, a large number of cut samples were immersed in water in an autoclave and treated at 150 ° C. under a pressure of 4.9 atm for 60 minutes. When the sample was taken out of the autoclave after the treatment, the vinyl chloride leather sheet and AS-G were completely separated from the polyurethane foam. The obtained polyurethane foam was hardly decomposed, and retained the original shape of the foam.
【００１８】Ｎｏ２は、Ｎｏ１の処理温度を１２０℃に
下げ２．０気圧で８０分間処理した。処理後の試料はＮ
ｏ１と同様に各層に分離でき、かつポリウレタン発泡体
はほとんど分解していなかった。Ｎｏ３は、Ｎｏ１の処
理温度を１８０℃に上げ１０．２気圧で５０分間処理し
た。処理後の試料はＮｏ１と同様に各層に分離でき、か
つポリウレタン発泡体はほとんど分解していなかった。For No. 2, the processing temperature of No. 1 was lowered to 120 ° C., and the treatment was carried out at 2.0 atm for 80 minutes. Sample after treatment is N
Like o1, the layers could be separated, and the polyurethane foam was hardly decomposed. In No. 3, the processing temperature of No. 1 was raised to 180 ° C. and the processing was performed at 10.2 atm for 50 minutes. The sample after the treatment could be separated into each layer similarly to No. 1, and the polyurethane foam was hardly decomposed.
【００１９】Ｎｏ４は処理液を水とイソプロピルアルコ
ール（ＩＰＡ）の等量混合液を用い、処理温度を１１０
℃で２．０気圧下で６０分間処理した。処理後の試料は
Ｎｏ１と同様に各層に分離でき、かつポリウレタン発泡
体はほとんど分解していなかった。Ｎｏ５はＮｏ４の処
理液を用い、処理温度を１３０℃に上げ３．９気圧下で
５０分間処理した。処理後の試料はＮｏ１と同様に各層
に分離でき、かつポリウレタン発泡体はほとんど分解し
ていなかった。Ｎｏ６はＮｏ４の処理液を用い、処理温
度を１６０℃に上げ８．０気圧下で４０分間処理した。
処理後の試料はＮｏ１と同様に各層は完全に分離でき、
かつポリウレタン発泡体はほとんど分解していなかっ
た。No. 4 uses a mixed solution of water and isopropyl alcohol (IPA) in the same amount, and sets the processing temperature to 110.
Treated at 2.0 ° C. for 60 minutes at 2.0 ° C. The sample after the treatment could be separated into each layer similarly to No. 1, and the polyurethane foam was hardly decomposed. For No. 5, the processing temperature of the processing liquid of No. 4 was raised to 130 ° C., and the processing was performed at 3.9 atm for 50 minutes. The sample after the treatment could be separated into each layer similarly to No. 1, and the polyurethane foam was hardly decomposed. For No. 6, the processing temperature was raised to 160 ° C. using the processing liquid of No. 4, and the processing was performed at 8.0 atm for 40 minutes.
After the treatment, each layer can be completely separated as in No. 1,
And the polyurethane foam was hardly decomposed.
【００２０】Ｎｏ７はＮｏ４の処理液に水酸化ナトリウ
ムを０．９％加えたものを使用し、１２０℃で３．０気
圧下で３０分間処理した。処理後の試料はＮｏ１と同様
に各層は完全に分離でき、かつポリウレタン発泡体はほ
とんど分解していなかった。Ｎｏ８はＮｏ７の処理液で
処理温度を１３０℃に上げ３．９気圧下で３０分間処理
した。処理後の試料はＮｏ１と同様に各層は完全に分離
でき、かつポリウレタン発泡体はほとんど分解していな
かった。Ｎｏ９はＮｏ７の処理液で処理温度を１００℃
に下げ１．５気圧下で４０分間処理した。処理後の試料
はＮｏ１と同様に各層は完全に分離でき、かつポリウレ
タン発泡体はほとんど分解していなかった。Ｎｏ１０は
Ｎｏ７の処理液で処理温度を１５０℃に上げ７．０気圧
下で２０分間処理した。処理後の試料はＮｏ１と同様に
各層は完全に分離でき、かつポリウレタン発泡体はほと
んど分解していなかった。No. 7 was prepared by adding 0.9% of sodium hydroxide to the treatment liquid of No. 4 and was treated at 120 ° C. under 3.0 atm for 30 minutes. In the sample after the treatment, each layer could be completely separated as in No. 1, and the polyurethane foam was hardly decomposed. No. 8 was treated with the treatment liquid of No. 7 by increasing the treatment temperature to 130 ° C. and treating at 3.9 atm for 30 minutes. In the sample after the treatment, each layer could be completely separated as in No. 1, and the polyurethane foam was hardly decomposed. No. 9 is the processing liquid of No. 7 and the processing temperature is 100 ° C.
And treated at 1.5 atm for 40 minutes. In the sample after the treatment, each layer could be completely separated as in No. 1, and the polyurethane foam was hardly decomposed. In No. 10, the processing temperature was raised to 150 ° C. with the processing liquid of No. 7, and the processing was performed at 7.0 atm for 20 minutes. In the sample after the treatment, each layer could be completely separated as in No. 1, and the polyurethane foam was hardly decomposed.
【００２１】各処理試料について材質の変質度合いを調
べるために、強度測定の試験片を作製して引張強度を測
定した。ポリウレタン発泡体からはダンベル状１号形試
験片（ＪＩＳ Ｋ ６３０１）を切り出した。分離した
塩化ビニルレザーシート層、ＡＳ−Ｇ層についてはその
変質を伴わない条件である２００〜２３０℃、２〜３分
溶融後に射出成形してダンベル状１号形試験片を作製し
た。これらの各試験片について引張試験（ＪＩＳ Ｋ
６３０１、ＪＩＳ Ｋ ７１１３）をおこなった。結果
を表２に示す。In order to examine the degree of deterioration of the material for each treated sample, a test piece for measuring the strength was prepared and the tensile strength was measured. A dumbbell-shaped No. 1 test piece (JIS K6301) was cut out from the polyurethane foam. The separated vinyl chloride leather sheet layer and AS-G layer were melt-molded at 200 to 230 ° C. for 2 to 3 minutes under conditions not accompanied by alteration, and injection molded to produce a dumbbell-shaped No. 1 test piece. For each of these test pieces, a tensile test (JIS K
6301, JIS K 7113). Table 2 shows the results.
【００２２】Ｎｏ２１は、試料を熱的、化学的処理をす
ることなく機械的手段により３層に分離して実施例と同
様の試験片を作製して、引張強度および伸び率を測定し
この測定値を標準として各試料と比較して変質度合いの
判定に用いた。変質度合いの判定基準は、試料と基準試
料との測定強度差が１０％以内のものを「変質なし」と
判定した。No. 21 was prepared by separating a sample into three layers by mechanical means without performing thermal or chemical treatment, producing a test piece similar to that of the example, and measuring the tensile strength and elongation. The value was used as a standard to determine the degree of alteration by comparing with each sample. As a criterion for the degree of alteration, a sample having a measured intensity difference of 10% or less between the sample and the reference sample was judged as “no alteration”.
【００２３】表２に示すようにＮｏ１〜１０は、いずれ
も３層に分離でき、分離した各材料から作製した試験片
の強度は、いずれも基準試料との差が１０％以内であり
ほとんど変質していないことを示している。総合評価の
欄で◎となっているＮｏ１、５、７、８は測定強度値が
基準試料と誤差範囲で等しく変質が認められない優れた
ものである。As shown in Table 2, each of No. 1 to No. 10 can be separated into three layers, and the strength of the test piece made from each separated material is less than 10% from that of the reference sample, and is almost deteriorated. It does not indicate that. Nos. 1, 5, 7, and 8 marked with ◎ in the column of the comprehensive evaluation are excellent in that the measured intensity values are equal to those of the reference sample within the error range and no deterioration is observed.
【００２４】水だけの場合は、１５０℃で６０分の処
理、水とＩＰＡとが等量の混合液の場合は、１３０℃で
５０分の処理、触媒量のアルカリを含む水とＩＰＡ等量
溶液中では、１２０〜１３０℃で３０分の処理が最適の
条件であった。なお、水だけの場合は、１２０〜１８０
℃の範囲、水とＩＰＡとが等量の混合液の場合は、１１
０〜１６０℃の範囲、アルカリを含む水とＩＰＡ等量溶
液中での場合は、１００〜１５０℃の範囲での処理によ
り変質の少ない再生品として剥離できる。In the case of water alone, treatment at 150 ° C. for 60 minutes, and in the case of a mixed solution of water and IPA in the same amount, treatment at 130 ° C. for 50 minutes, water containing a catalytic amount of alkali and IPA equivalent amount In the solution, treatment at 120 to 130 ° C. for 30 minutes was the optimal condition. In the case of only water, 120 to 180
° C, water and IPA in the case of a mixture of equal amounts,
In the case of a solution in an equivalent solution of IPA and water containing alkali in the range of 0 to 160 ° C, it can be peeled off as a regenerated product with less deterioration by treatment in the range of 100 to 150 ° C.
【００２５】[0025]
【表２】 注：引張強度の単位はｋｇｆ／ｃｍ2 、伸び率の単位は
％である。総合評価は、３層が分離し、いすれも変質せ
ず、かつポリウレタン発泡体の分解のないものを○、そ
のうち特に良いものを◎とした。[Table 2] Note: The unit of tensile strength is kgf / cm 2 and the unit of elongation is%. In the overall evaluation, ○ indicates that the three layers were separated, none of which was degraded, and the polyurethane foam was not decomposed.
【００２６】[0026]
【表３】 注：３層分離の有無は分離しなかたものを「非分離」
に、判定不可能であったものを「不可能」に、分離でき
たものを「分離」と記載した。 （比較例）実施例と同じ自動車用計器盤の廃品を約５×
２０ｃｍ角に切断した試料を用いた。この試料を表３の
各条件で処理して、各層の剥離状況を調べた。Ｎｏ２２
は、切断試料多数をオートクレーブ中で水に浸漬し、処
理温度を１００℃で１．０気圧下で６０分間処理した。
処理後の試料は各層に分離できなかった。すなわち、処
理温度が低いため剥離が進行しなかった。Ｎｏ２３は、
処理温度を２００℃に上げ１５．９気圧下で６０分間と
した。処理試料は温度が高いためポリウレタン発泡体が
分解しており層間の分離の判定は不可能であった。Ｎｏ
２４は処理液を水とイソプロピルアルコールを等量の混
合液を用い、処理温度を１３０℃で３．９気圧下で２０
分間処理した。処理後の試料には、ポリウレタンが付着
して完全に分離されていなかった。すなわち、処理時間
が短く剥離の進行が不十分であった。Ｎｏ２５はＮｏ２
４の処理液で温度を１８０℃に上げて１４．０気圧下で
６０分間処理した。処理後の試料はポリウレタン発泡体
が分解しており層間の分離の判定が不可能であった。Ｎ
ｏ２６はＮｏ２４の処理液に水酸化ナトリウムを０．９
％加えたものを使用し、温度を１３０℃で３．９気圧下
で１０分間処理した。処理後の試料には、積層部にポリ
ウレタン発泡体が付着しており完全に分離されていなか
った。Ｎｏ２７は処理条件を１５０℃で７．０気圧とし
３０分間処理した。処理後の試料はポリウレタン発泡体
がある程度分解していたが、３層には分離していた。Ｎ
ｏ２８は処理条件を１２０℃で３．０気圧とし６０分間
処理した。処理後の試料はポリウレタン発泡体がある程
度分解していたが、３層には分離していた。Ｎｏ２９は
処理条件を１８０℃で１４．０気圧下とし６０分間処理
した。処理後の試料はポリウレタン発泡体が分解してお
り層間の分離の判定は不可能であった。[Table 3] Note: The presence or absence of three-layer separation means "non-separation" for those without separation.
In addition, what could not be determined was described as "impossible", and what could be separated was described as "separation". (Comparative Example) About 5 × waste of the same instrument panel for automobile as in the example
A sample cut into a 20 cm square was used. This sample was processed under the conditions shown in Table 3, and the state of peeling of each layer was examined. No22
Was prepared by immersing a large number of cut samples in water in an autoclave and treating at a treatment temperature of 100 ° C. under 1.0 atm for 60 minutes.
The sample after the treatment could not be separated into each layer. That is, the peeling did not proceed because the processing temperature was low. No23 is
The processing temperature was increased to 200 ° C. and at 15.9 atm for 60 minutes. Since the temperature of the treated sample was high, the polyurethane foam was decomposed, and it was impossible to determine the separation between the layers. No
Reference numeral 24 denotes a treatment liquid which uses a mixture of water and isopropyl alcohol in an equal amount, and is treated at a treatment temperature of 130 ° C. under a pressure of 3.9 atm.
Minutes. The sample after the treatment was not completely separated due to adhesion of the polyurethane. That is, the processing time was short and the progress of peeling was insufficient. No25 is No2
The temperature was raised to 180 ° C. with the treating solution of No. 4 and the treatment was performed at 14.0 atm for 60 minutes. In the sample after the treatment, the polyurethane foam was decomposed, and it was impossible to determine the separation between the layers. N
o26 is 0.9% sodium hydroxide
The mixture was treated at 130 ° C. under 3.9 atm for 10 minutes. In the sample after the treatment, the polyurethane foam adhered to the laminated portion and was not completely separated. No. 27 was treated at 150 ° C. and 7.0 atm for 30 minutes. In the sample after the treatment, the polyurethane foam was decomposed to some extent, but separated into three layers. N
For o28, the treatment was performed at 120 ° C. and 3.0 atm for 60 minutes. In the sample after the treatment, the polyurethane foam was decomposed to some extent, but separated into three layers. No. 29 was treated at 180 ° C. under 14.0 atm for 60 minutes. In the sample after the treatment, the polyurethane foam was decomposed, and it was impossible to determine the separation between the layers.
【００２７】[0027]
【表４】 比較例で処理した各試料のうち分離できたものについて
は、実施例と同様に強度測定用の試験片を作製して同様
に測定した。結果を表４に示す。[Table 4] Of the samples that were processed in the comparative example, those that could be separated were prepared in the same manner as in the examples, and test specimens for measuring the strength were measured. Table 4 shows the results.
【００２８】Ｎｏ２７、２８については塩化ビニル、Ａ
Ｓ−Ｇともに変質せず実施例並みの強度をもつが、ポリ
ウレタンが分解しており測定試験片が作製できなかっ
た。Ｎｏ２３、２５はポリウレタン発泡体、塩化ビニル
は分解したが、ＡＳ−Ｇは強度測定用の試験片は作製で
きたが、他の樹脂成分が混入しており強度が半分以下に
低下し変質していた。For Nos. 27 and 28, vinyl chloride, A
Both SGs were not deteriorated and had the same strength as in the example, but the polyurethane was decomposed, and a measurement test piece could not be prepared. Nos. 23 and 25 decomposed the polyurethane foam and vinyl chloride, but AS-G produced a test piece for measuring the strength, but other resin components were mixed in and the strength was reduced to less than half and deteriorated. Was.
【００２９】したがって、本発明の処理条件範囲であれ
ば、積層部をポリウレタン発泡体より剥離でき、剥離し
たものがそのまま再利用可能な物性を有している。 （参考例）実施例と同じ試料を、流入管および流出管を
設けた開放系の容器中に置き、容器内部をヒータで１５
０℃に加熱しながら１気圧の水蒸気に９０分間暴露を続
けたところ、ポリウレタン発泡複合体は各層に分離で
き、各樹脂は変質しておらず実施例と同様の状態を示し
た。しかし、容器内部の加熱温度を２５０℃（６０分
間）とした場合は、処理試料が分解しており３層に分離
したかどうかの判定が困難な状態であった。Therefore, within the processing conditions of the present invention, the laminated portion can be peeled from the polyurethane foam, and the peeled portion has physical properties that can be reused as it is. (Reference Example) The same sample as in the example was placed in an open-type container provided with an inflow pipe and an outflow pipe, and the inside of the container was heated with a heater.
Exposure to water vapor at 1 atm while heating to 0 ° C. continued for 90 minutes. As a result, the polyurethane foam composite could be separated into each layer, and each resin did not deteriorate and showed the same state as in the example. However, when the heating temperature inside the container was 250 ° C. (60 minutes), it was difficult to determine whether the treated sample had decomposed and separated into three layers.
【００３０】[0030]
【発明の効果】本発明の剥離方法により、分離が困難な
ポリウレタン発泡複合体の廃品を各積層別に分離し、処
理後には材質の変化のないそれぞれの樹脂などの再生品
を得ることができる。したがって、従来廃棄されていた
廃品の再利用が可能となり資源の有効利用が可能となっ
た。According to the peeling method of the present invention, waste products of the polyurethane foam composite, which are difficult to separate, can be separated for each lamination, and regenerated products such as respective resins whose materials do not change after treatment can be obtained. Therefore, it is possible to reuse a waste product that has been conventionally discarded, and to use resources effectively.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴木 正一 愛知県愛知郡長久手町大字長湫字横道41 番地の１ 株式会社豊田中央研究所内 (72)発明者 岩切 正司 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (72)発明者 横井 利男 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (56)参考文献 特開 平６−114842（ＪＰ，Ａ) 特開 平６−114843（ＪＰ，Ａ) 特開 昭50−52181（ＪＰ，Ａ) 特開 平５−228936（ＪＰ，Ａ) 特開 平６−99433（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B09B 3/00 303 - 304 B09B 5/00 B29B 17/02 C08J 11/00 - 11/28 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shoichi Suzuki 41-1 Chuchu-Yokomichi, Nagakute-cho, Aichi-gun, Aichi Prefecture Inside Toyota Central R & D Laboratories Co., Ltd. Inside Toyota Motor Corporation (72) Inventor Toshio Yokoi 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (56) References JP-A-6-114842 (JP, A) JP-A-6-114843 ( JP, A) JP-A-50-52181 (JP, A) JP-A-5-228936 (JP, A) JP-A-6-99433 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B09B 3/00 303-304 B09B 5/00 B29B 17/02 C08J 11/00-11/28
Claims (4)
面に接合された樹脂、シートまたは金属板で構成された
接合部材とからなるポリウレタン発泡複合体からポリウ
レタン発泡体を剥離する方法であって、 該ポリウレタン発泡複合体を閉空間中で水を主成分とす
る処理液中で１００℃〜１８０℃の温度に加熱処理し
て、該ポリウレタン発泡複合体からポリウレタン発泡体
を剥離することを特徴とするポリウレタン発泡複合体の
剥離方法。1. A polyurethane foam and a resin, sheet or metal plate bonded to at least one surface of the polyurethane foam .
A method for peeling a polyurethane foam from a polyurethane foam composite comprising a joining member, heated to a temperature of 100 ° C. to 180 ° C. in the treatment solution containing water as a main component the polyurethane foam composite in a closed space Treating the polyurethane foam composite to release the polyurethane foam from the polyurethane foam composite.
℃〜１８０℃の温度で５０分ないし８０分の条件で処理
することを特徴とする請求項１記載のポリウレタン発泡
複合体の剥離方法。2. The treatment liquid is water, and the heat treatment is 120
2. The method for peeling a polyurethane foam composite according to claim 1, wherein the treatment is carried out at a temperature of from 1 to 180 [deg.] C. for from 50 to 80 minutes .
し、該加熱処理は１１０℃〜１６０℃の温度で４０分〜
６０分の条件で処理することを特徴とする請求項１記載
のポリウレタン発泡複合体の剥離方法。3. The treatment solution is a mixed system of water and alcohol, and the heat treatment is performed at a temperature of 110 ° C. to 160 ° C. for 40 minutes to
2. The method according to claim 1, wherein the treatment is performed for 60 minutes .
ルの混合系とし、該処理条件を１００℃〜１５０℃の温
度で２０分〜４０分の条件で処理することを特徴とする
請求項１記載のポリウレタン発泡複合体の剥離方法。4. The treatment solution is a mixed system of water containing an alkali and alcohol , and the treatment conditions are 100 ° C. to 150 ° C.
The method for peeling a polyurethane foam composite according to claim 1, wherein the treatment is performed under conditions of 20 minutes to 40 minutes in degrees .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1013093A JP3144660B2 (en) | 1993-01-25 | 1993-01-25 | Method for peeling polyurethane foam composite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1013093A JP3144660B2 (en) | 1993-01-25 | 1993-01-25 | Method for peeling polyurethane foam composite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06220245A JPH06220245A (en) | 1994-08-09 |
| JP3144660B2 true JP3144660B2 (en) | 2001-03-12 |
Family
ID=11741710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1013093A Expired - Fee Related JP3144660B2 (en) | 1993-01-25 | 1993-01-25 | Method for peeling polyurethane foam composite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3144660B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10312953B4 (en) * | 2003-03-22 | 2005-07-21 | Hma Automotive Gmbh Consulting Und Development | Method for separating composites |
| JP2013103158A (en) * | 2011-11-11 | 2013-05-30 | Nissan Motor Co Ltd | Method for removing urethane from metal-urethane composite material |
| JP7239070B2 (en) * | 2021-03-11 | 2023-03-14 | Dic株式会社 | Method for separating and recovering a laminate having a plastic film layer, and method for producing recycled plastic pellets using crushed plastic recovered by the method |
| JP7211568B1 (en) * | 2021-03-11 | 2023-01-24 | Dic株式会社 | Ink stripping method, ink stripping agent used in the ink stripping method, and plastic substrate recovery method using these |
-
1993
- 1993-01-25 JP JP1013093A patent/JP3144660B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06220245A (en) | 1994-08-09 |
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