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JP4126340B2 - Method for separating and recovering vinyl chloride backing layer from tile carpet - Google Patents
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JP4126340B2 - Method for separating and recovering vinyl chloride backing layer from tile carpet - Google Patents

Method for separating and recovering vinyl chloride backing layer from tile carpet Download PDF

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JP4126340B2
JP4126340B2 JP2003271585A JP2003271585A JP4126340B2 JP 4126340 B2 JP4126340 B2 JP 4126340B2 JP 2003271585 A JP2003271585 A JP 2003271585A JP 2003271585 A JP2003271585 A JP 2003271585A JP 4126340 B2 JP4126340 B2 JP 4126340B2
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vinyl chloride
backing layer
carpet
layer
chloride backing
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JP2004168023A (en
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洋 真野
正四郎 石山
康夫 柳田
勝美 木村
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株式会社タジマ
株式会社資源化研究所
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B17/0206—Selectively separating reinforcements from matrix material by destroying the interface bound before disintegrating the matrix to particles or powder, e.g. from tires or belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B29B17/0412—Disintegrating plastics, e.g. by milling to large particles, e.g. beads, granules, flakes, slices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/26—Scrap or recycled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/732—Floor coverings
    • B29L2031/7322—Carpets
    • 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

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Description

本発明は、カーペット層と塩化ビニル裏打ち層よりなるタイルカーペットから塩化ビニル裏打ち層を分離回収する方法に関するものである。   The present invention relates to a method for separating and recovering a vinyl chloride backing layer from a tile carpet comprising a carpet layer and a vinyl chloride backing layer.

タイルカーペットが広く使われるようになって１０数年が経過し、更新の時期を迎えている。一方、廃棄物の処理は、年々困難になってきており、特に塩化ビニル樹脂系製品はダイオキシンの問題を伴い、その廃棄は一層困難であるため、回収したタイルカーペットの再利用が社会的課題となってきている。
米国などでは、洗浄したのち表面のカーペット層を再度染色し模様を施して再利用しているが、一度汚れたカーペット層の汚れを充分に落とすことは難しく、染色の色合いは必然的に濃い色に限定されてくるのが実情である。
タイルカーペットの再利用技術としては、特許文献１〜２記載の技術がある。これらの技術は、カーペット層を実質的に刈り取って除去することにより得られた廃材の表面または裏面に表面化粧樹脂層を形成するものである。カーペット層を実質的に刈り取って除去する理由は、カーペット層が存在すると、その面に接着剤や粘着材が適用できないからである。そのため、これらの技術においてはカーペット層を実質的に刈り取ってしまう必要があったのである。しかし、その結果として大量のカーペット層の繊維屑が発生し、これが産業廃棄物になるという問題があるほか、カーペット層の刈り取り工程が必要となるためコストアップの原因となる。
また、特許文献３〜５に記載されている回収タイルカーペットを微細に粉砕し、比重分離法等によりカーペット層と塩化ビニル裏打ち層を分離する方法も一般に行われているが、常温で柔らかいタイルカーペットを粉砕するには多くのエネルギーを必要とし粉砕時の騒音も大きい。
更に、特許文献６には、マイナス３０℃以下に冷凍することにより容易に粉砕できる裏打ち層を用いたタイルカーペットを作ることも提案されているが、既に市場に出回っている軟質塩化ビニルを裏打ち層とするタイルカーペットに適用するには冷凍温度を極度に低くする必要があるため、実用には至っていない。 Ten years have passed since tile carpets were widely used, and the time has come for renewal. On the other hand, the disposal of waste has become difficult year by year, and in particular, vinyl chloride resin-based products are accompanied by the problem of dioxins, and the disposal is even more difficult. It has become to.
In the US, etc., after cleaning, the carpet layer on the surface is re-stained, patterned, and reused. However, once the soiled carpet layer is difficult to remove, it is difficult to remove the stain, and the color of the dyeing is inevitably dark. The fact is that it is limited to.
As a technique for reusing tile carpets, there are techniques described in Patent Documents 1 and 2. In these techniques, a surface decorative resin layer is formed on the front surface or the back surface of the waste material obtained by substantially cutting and removing the carpet layer. The reason why the carpet layer is substantially cut and removed is that when the carpet layer exists, an adhesive or a pressure-sensitive adhesive cannot be applied to the surface. Therefore, in these techniques, it was necessary to substantially cut the carpet layer. However, as a result, there is a problem that a large amount of fiber waste of the carpet layer is generated, which becomes industrial waste, and a carpet layer mowing process is required, leading to an increase in cost.
In addition, a method of finely pulverizing the recovered tile carpet described in Patent Documents 3 to 5 and separating the carpet layer and the vinyl chloride backing layer by a specific gravity separation method or the like is generally performed. It takes a lot of energy to pulverize, and the noise during pulverization is large.
Furthermore, Patent Document 6 proposes to make a tile carpet using a backing layer that can be easily pulverized by freezing to minus 30 ° C. or lower. However, the soft vinyl chloride already on the market is used as the backing layer. Since it is necessary to make the freezing temperature extremely low for application to the tile carpet, it has not been put into practical use.

特開２０００−２２０２８１号公報JP 2000-220281 A 特開２０００−２２０２８２号公報JP 2000-220282 A 実開昭５９―１３２５８１号公報 第１頁Japanese Utility Model Publication No.59-132581 first page 実開昭５９―１３２５８２号公報 第１頁Japanese Utility Model Publication No.59-132582, first page 特開平８―３１２１１７号公報 第２頁 段落０００５JP-A-8-312117, page 2, paragraph 0005 特開平９―１７３１９７号公報 第３頁 段落００１８JP-A-9-173197, page 3, paragraph 0018

本発明は、多大のエネルギーを必要とせず、騒音や粉塵の発生もなく、且つ、カーペット層の繊維の混入も無い純度の高い塩化ビニル裏打ち層を、タイルカーペットから効率的に分離回収する方法の提供を目的とする。   The present invention provides a method for efficiently separating and recovering a high-purity vinyl chloride backing layer from a tile carpet, which does not require a great deal of energy, does not generate noise or dust, and does not contain fibers in the carpet layer. For the purpose of provision.

本発明は、１．２〜５倍の回転差を有する一対のロールの隙間をカーペット層と塩化ビニル裏打ち層からなるタイルカーペットの塩化ビニル裏打ち層の厚さ以下に絞り、１００〜１７０℃に加熱したタイルカーペットを、該一対のロールのうち速い方のロール側に塩化ビニル裏打ち層が来るようにして前記隙間に通すことにより、カーペット層と塩化ビニル裏打ち層の境界面に層間のずれを生じさせ、剥離を起こさせることを特徴とするタイルカーペットから塩化ビニル裏打ち層を分離回収する方法に関する。 In the present invention, a gap between a pair of rolls having a rotational difference of 1.2 to 5 times is reduced to a thickness of a vinyl chloride backing layer of a tile carpet composed of a carpet layer and a vinyl chloride backing layer, and heated to 100 to 170 ° C. The tile carpet is passed through the gap so that the vinyl chloride backing layer is on the faster roll side of the pair of rolls, thereby causing a gap between the carpet layer and the vinyl chloride backing layer. And a method for separating and recovering a vinyl chloride backing layer from a tile carpet characterized by causing peeling.

以下、上記本発明について詳しく説明する。
本発明におけるタイルカーペットとは、カーペット層（繊維層）と塩化ビニル裏打ち層の二層構造を有する床仕上げ材を指し、ビチュウメン（瀝青）バッキングのものは含まないものとする。
本発明においては、タイルカーペットを１００℃〜１７０℃に加熱する必要がある。好ましくは１１０℃〜１４０℃である。１００℃未満では剥離が円滑に行われないし、１７０℃を越えると、塩化ビニル裏打ち層に粘着性が出てロールに付着し、カーペット層に塩化ビニルが練り込まれる状態が発生することがあり、分離はより困難になる。
本発明において、タイルカーペットの加熱温度とは塩化ビニル裏打ち層の表面を非接触型温度計にて測定したものを言う。
タイルカーペットを加熱する方法としては、熱風を吹き付ける方法、加熱炉を通過させる方法、赤外線ヒーターを通過させる方法、熱板の上を通過させる方法、超音波加熱を用いる方法などが挙げられるが、回収した使用済みタイルカーペットの場合にはカーペット側が汚れているので、洗浄を兼ねてスチームを吹き付ける方法も採用可能である。スチームの温度は高いほど効果的であるが、１１０℃〜１６０℃が作業しやすい温度である。
Hereinafter, the present invention will be described in detail.
The tile carpet in the present invention refers to a floor finishing material having a two-layer structure of a carpet layer (fiber layer) and a vinyl chloride backing layer, and does not include a bitumen backing.
In the present invention, it is necessary to heat the tile carpet to 100 to 170 ° C. Preferably it is 110 to 140 degreeC. If it is less than 100 ° C. , peeling does not occur smoothly, and if it exceeds 170 ° C., the vinyl chloride backing layer becomes sticky and adheres to the roll, and the carpet layer may be kneaded into the carpet layer. Separation becomes more difficult.
In the present invention, the heating temperature of the tile carpet means a temperature measured on the surface of the vinyl chloride backing layer with a non-contact thermometer.
Examples of the method for heating the tile carpet include a method of blowing hot air, a method of passing through a heating furnace, a method of passing through an infrared heater, a method of passing over a hot plate, a method of using ultrasonic heating, etc. In the case of the used tile carpet, since the carpet side is dirty, it is possible to employ a method of spraying steam also for cleaning. The higher the steam temperature, the more effective, but 110 ° C. to 160 ° C. is the temperature at which it is easy to work.

加熱されたタイルカーペットを一対のロールの隙間に通すのは、タイルカーペット中の一番弱い組織の部分で組織を破壊し、剥離を起させるのが目的である。従って、カーペット層と塩化ビニル裏打ち層の境界面に層間のずれを生じさせる意味から回転差を設ける必要があり、その回転差は１．２〜５倍であることが好ましく、さらに好ましくは２〜５倍である。加熱されたタイルカーペットを一対のロールの隙間に通す際には、回転の速いロール側に塩化ビニル裏打ち層が来るように投入することが必須である。投入する向きを反対にしてカーペット層を速いロール側にして通すと分離することは難しくなる。
同様に、一対のロールの隙間は、カーペット層と塩化ビニル裏打ち層の境界面に層間のずれを生じさせる意味から、タイルカーペットの塩化ビニル裏打ち層の厚さ以下とする。一対のロールの隙間がタイルカーペットの厚さを越えるとタイルカーペットがずり落ちてしまうし、カーペット層と塩化ビニル裏打ち層の境界面に層間のずれを生じさせることが出来ない。
分離されたカーペット層には、塩化ビニル裏打ち層が一部付着して含有されているが、該塩化ビニル裏打ち層は境界面に生じた層間のずれのためにボロボロの状態になっており、カーペット層を擦るとか、揉むとかすることで含有されている塩化ビニル裏打ち層をさらに丁寧に分離すれば、より純度の高いカーペット層を得ることができる。 The purpose of passing the heated tile carpet through the gap between the pair of rolls is to destroy the structure at the weakest part of the tissue in the tile carpet and cause peeling. Accordingly, it is necessary to provide a rotation difference in order to cause a shift between the layers at the boundary surface between the carpet layer and the vinyl chloride backing layer, and the rotation difference is preferably 1.2 to 5 times, more preferably 2 to 2. 5 times. When the heated tile carpet is passed through the gap between the pair of rolls, it is essential that the vinyl chloride backing layer be placed on the side of the roll that rotates rapidly. If the carpet layer is passed on the fast roll side with the loading direction reversed, separation becomes difficult.
Similarly, the gap between the pair of rolls is set to be equal to or less than the thickness of the vinyl chloride backing layer of the tile carpet in order to cause a shift between the layers at the boundary surface between the carpet layer and the vinyl chloride backing layer. If the gap between the pair of rolls exceeds the thickness of the tile carpet, the tile carpet slides down, and the interlayer between the carpet layer and the vinyl chloride backing layer cannot be displaced.
The separated carpet layer contains a vinyl chloride backing layer in a partially adhered state, but the vinyl chloride backing layer is in a tattered state due to the displacement between layers generated at the boundary surface. By further carefully separating the vinyl chloride backing layer contained by rubbing or rubbing the layer, a carpet layer with higher purity can be obtained.

以上の方法の工程を、図面を示して説明する。
図１は、本発明の分離方法でタイルカーペットから塩化ビニル裏打ち層を分離回収する方法の原理を示す断面図である。
回転速度の異なる一対のロール２の間に、別途加熱したタイルカーペット１を、塩化ビニル裏打ち層を速いロール側にして通す。この際、一対のロール２の間隙は塩化ビニル裏打ち層の厚さ以下に設定される。一対のロールの隙間を通過したタイルカーペットは、二層の境界面で塩化ビニル裏打ち層４と塩化ビニル組成物が若干付着したカーペット層３に容易に分離されるのである。 The steps of the above method will be described with reference to the drawings.
FIG. 1 is a sectional view showing the principle of a method for separating and recovering a vinyl chloride backing layer from a tile carpet by the separation method of the present invention.
The tile carpet 1 heated separately is passed between a pair of rolls 2 having different rotation speeds with the vinyl chloride backing layer on the fast roll side. At this time, the gap between the pair of rolls 2 is set to be equal to or less than the thickness of the vinyl chloride backing layer. The tile carpet that has passed through the gap between the pair of rolls is easily separated into a carpet layer 3 to which the vinyl chloride backing layer 4 and the vinyl chloride composition are slightly attached at the boundary surface between the two layers.

図２は、本発明のタイルカーペットから塩化ビニル裏打ち層を分離回収する工程の一例を示す断面図である。
回収されたタイルカーペットはコンベア６に乗って加熱炉５を通り、加熱されたタイルカーペット１となり、回転差のある一対のロール２に供給される。その際、加熱されたタイルカーペットの塩化ビニル裏打ち層は、回転の速い方のロール２−２に、カーペット層は回転の遅い方のロール２−１に供給される。
一対のロール２の隙間を通過したタイルカーペットは、塩化ビニル裏打ち層が引き伸ばされた状態でカーペット層３と分離されて出てくる。回転の速い側のロールにはスクレイバーブレード８が取り付けられており、ロールに付着した塩化ビニル裏打ち層４が分離工程のコンベアに誘導され容易に分離できる。カーペット層は別のコンベアで分離される。 FIG. 2 is a cross-sectional view showing an example of a process for separating and recovering the vinyl chloride backing layer from the tile carpet of the present invention.
The collected tile carpet passes on the conveyor 6, passes through the heating furnace 5, becomes a heated tile carpet 1, and is supplied to a pair of rolls 2 having a rotational difference. At that time, the vinyl chloride backing layer of the heated tile carpet is supplied to the roll 2-2 having a higher rotation speed, and the carpet layer is supplied to the roll 2-1 having a lower rotation speed.
The tile carpet that has passed through the gap between the pair of rolls 2 is separated from the carpet layer 3 in a state where the vinyl chloride backing layer is stretched. A scraper blade 8 is attached to the roll on the fast rotating side, and the vinyl chloride backing layer 4 adhering to the roll is guided to the conveyor in the separation process and can be easily separated. The carpet layers are separated on a separate conveyor.

本発明で分離回収された塩化ビニル裏打ち層は、再度タイルカーペットまたは合成樹脂床タイルの裏打ち層として利用することができる。
また、本発明で分離回収された塩化ビニル裏打ち層は、単独で、または他の方法で回収された塩化ビニル組成物と混合して、ＯＡ床、住宅用二重床、屋外用二重床の支柱として利用することができる。
本発明で分離回収されたカーペット層（繊維層）は、予めナイロンと他の繊維に分別しておき、塩化ビニル裏打ち層を若干含んだ粗ナイロンとして利用し、ＯＡ床の床パネル、コンクリート打設時の型枠材等の強度を要する板材として利用することができる。
また、純度の高いカーペット層（繊維層）が得られれば、この繊維の再利用の道がさらに広がる可能性も出てくる。 The vinyl chloride backing layer separated and recovered in the present invention can be used again as a backing layer for tile carpets or synthetic resin floor tiles.
In addition, the vinyl chloride backing layer separated and recovered in the present invention may be used alone or mixed with a vinyl chloride composition recovered by other methods to form an OA floor, a residential double floor, and an outdoor double floor. It can be used as a support.
The carpet layer (fiber layer) separated and recovered in the present invention is preliminarily separated into nylon and other fibers, and is used as crude nylon slightly containing a vinyl chloride backing layer. It can be used as a plate material requiring strength such as a formwork material.
In addition, if a carpet layer (fiber layer) with high purity is obtained, there is a possibility that the path of reuse of this fiber will be further expanded.

本発明は、次の（１）〜（４）のような効果を奏する。
（１）従来は管理型産業廃棄物処分場に廃棄するか、焼却するしかなかったタイルカーペットの廃棄物から、加熱して一対のロールの隙間を通すという簡単な作業と工程で、カーペット層と塩化ビニル裏打ち層とを分離することができる。
（２）分離した塩化ビニル裏打ち層にはカーペットの繊維屑が混入しておらず、裏打ち層としては極めて純度が高いので、再溶融しタイルカーペットなどの床材の原料として再利用するのに極めて有用である。
（３）分離したカーペット層は塩化ビニル裏打ち層を約５０％含んでいるが、管理型ではない産業廃棄物処分場でも処分できるし、処理前のタイルカーペットに比べて重量で約３分の１に減量しており、塩化ビニル裏打ち層の含有量も、回収処理前の約８７％から回収処理後には約５０％に変化しているので、例えば焼却する場合には有利であるし、ナイロンそのものとしての再利用方法も開けてくる。
（４）この工程は、従来法に比べて騒音が少なく、エネルギー消費量も少ない。さらに、本発明の分離回収方法によれば、粉砕工程や刈り取り工程を必要としないため、カーペットの繊維屑その他の塵埃が発生せず、作業環境および作業者の健康の面でも極めて優れている。 The present invention has the following effects (1) to (4).
(1) A carpet layer and a simple work and process of heating through a gap between a pair of rolls from tile carpet waste that has conventionally been disposed of in a managed industrial waste disposal site or incinerated. The vinyl chloride backing layer can be separated.
(2) The separated vinyl chloride backing layer does not contain carpet fiber waste and is extremely pure as the backing layer, so it is extremely reusable and reused as a raw material for flooring materials such as tile carpets. Useful.
(3) The separated carpet layer contains about 50% of the vinyl chloride backing layer, but it can be disposed of at an unmanaged industrial waste disposal site and is about one-third by weight compared to the tile carpet before treatment. Since the content of the vinyl chloride backing layer has also changed from about 87% before the recovery process to about 50% after the recovery process, it is advantageous for incineration, for example, nylon itself As a way to reuse it.
(4) This process has less noise and less energy consumption than the conventional method. Furthermore, according to the separation and recovery method of the present invention, a pulverizing step and a mowing step are not required, so that carpet fiber waste and other dust are not generated, which is extremely excellent in terms of work environment and worker health.

以下、実施例により本発明を更に具体的に説明するが、本発明はこの実施例により何ら限定されるものではない。   Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to the examples.

実施例１
回収したタイルカーペット（全体の厚さ６．５ｍｍ、塩化ビニル裏打ち層の厚さ３．０ｍｍ）を２００℃の加熱炉に２．５分間入れて、タイルカーペットの塩化ビニル裏打ち層の表面温度を１４０℃に加熱し、すかさず塩化ビニル裏打ち層が速い方のロール側に来るようにして一対のロールの隙間を通した。この一対のロールは、予め、ロール間隙１．２ｍｍ、ロール温度３０℃、回転差４．２倍に設定した。
回収したタイルカーペットのカーペット層と塩化ビニル裏打ち層の重量比は、約１３対８７であったが、この工程を通して二層に分離した結果、塩化ビニル裏打ち層の一部が粉末状で付着したカーペット層（重量比で３９％）と、純粋な塩化ビニル裏打ち層（重量比で６１％）に分離することができた。 Example 1
The collected tile carpet (total thickness 6.5 mm, vinyl chloride backing layer thickness 3.0 mm) was placed in a heating furnace at 200 ° C. for 2.5 minutes, and the surface temperature of the vinyl chloride backing layer of the tile carpet was 140. The mixture was heated to 0 ° C., and the gap between the pair of rolls was passed through so that the vinyl chloride backing layer was on the faster roll side. The pair of rolls was set in advance with a roll gap of 1.2 mm, a roll temperature of 30 ° C., and a rotation difference of 4.2 times.
The weight ratio of the carpet layer and the vinyl chloride backing layer of the recovered tile carpet was about 13 to 87. As a result of separation into two layers through this process, the carpet in which a part of the vinyl chloride backing layer adhered as a powder. It was possible to separate into a layer (39% by weight) and a pure vinyl chloride backing layer (61% by weight).

実施例２
回収したタイルカーペット(全体厚さ６．５ｍｍ、塩化ビニル裏打ち層３．０ｍｍ)を遠赤外線ヒーターで加熱してタイルカーペットの塩化ビニル裏打ち層の表面温度を１００℃とし、すかさずロールに塩化ビニル裏打ち層が速い方のロール側に来るようにして一対のロールの隙間を通した。この一対のロールは、予め、ロール間隙１．２ｍｍ、ロール温度３０℃、回転差３．０倍に設定した。
回収したタイルカーペットのカーペット層と塩化ビニル裏打ち層の重量比は約１３対８７であったが、この工程を通して二層に分離した結果、塩化ビニル裏打ち層の両端の一部が付着したカーペット層(重量比で４５％)と純粋な塩化ビニル裏打ち層(重量比で５５％)に分離することが出来た。 Example 2
The collected tile carpet (total thickness 6.5 mm, vinyl chloride backing layer 3.0 mm) is heated with a far-infrared heater so that the surface temperature of the vinyl chloride backing layer of the tile carpet is 100 ° C., and the vinyl chloride backing layer is quickly applied to the roll. The gap between the pair of rolls was passed through so as to come to the faster roll side. This pair of rolls was previously set to a roll gap of 1.2 mm, a roll temperature of 30 ° C., and a rotation difference of 3.0 times.
The weight ratio of the carpet layer and the vinyl chloride backing layer of the collected tile carpet was about 13 to 87. As a result of separation into two layers through this process, the carpet layer (part of both ends of the vinyl chloride backing layer adhered) And 45% by weight) and a pure vinyl chloride backing layer (55% by weight).

比較例1
回収したタイルカーペット(全体厚さ６．５ｍｍ、塩化ビニル裏打ち層３．０ｍｍ)を１５０℃の加熱炉に２．０分間入れて、タイルカーペットの塩化ビニル裏打ち層の表面温度を８０℃に加熱した点以外は実施例１と同じ条件で処理した。その結果、カーペット層と塩化ビニル裏打ち層は部分的にくっ付いているところがあり、円滑に分離できず、かつ不完全にしか分離出来なかった。 Comparative Example 1
The collected tile carpet (total thickness 6.5 mm, vinyl chloride backing layer 3.0 mm) was placed in a 150 ° C. heating furnace for 2.0 minutes to heat the surface temperature of the vinyl carpet backing layer of the tile carpet to 80 ° C. Processing was performed under the same conditions as in Example 1 except for the points. As a result, the carpet layer and the vinyl chloride backing layer were partially attached, and could not be separated smoothly and only partially.

比較例２
回収したタイルカーペット(全体厚さ６．５ｍｍ、塩化ビニル裏打ち層３．０ｍｍ)を２００℃の加熱炉に５．０分間入れて、タイルカーペットの塩化ビニル裏打ち層の表面温度を１８０℃に加熱した点以外は実施例１と同じ条件で処理した。その結果、塩化ビニル裏打ち層と塩化ビニル裏打ち層の一部が付着したカーペット層とに分離することが出来たが、タイルカーペットの表面温度が高すぎるため、繰り返し実験では塩化ビニル裏打ち層が軟化してロールに巻きつき失敗することがあった。 Comparative Example 2
The collected tile carpet (total thickness 6.5 mm, vinyl chloride backing layer 3.0 mm) was placed in a heating furnace at 200 ° C. for 5.0 minutes, and the surface temperature of the vinyl chloride backing layer of the tile carpet was heated to 180 ° C. Processing was performed under the same conditions as in Example 1 except for the points. As a result, it was possible to separate the vinyl chloride backing layer and the carpet layer to which a part of the vinyl chloride backing layer was attached, but the surface temperature of the tile carpet was too high, and the vinyl chloride backing layer softened in repeated experiments. Sometimes, it rolls around a roll and fails.

タイルカーペットの塩化ビニル裏打ち層とカーペット層の境界面で両層を分離回収する方法の原理を示す断面図。Sectional drawing which shows the principle of the method of isolate | separating and collect | recovering both layers in the interface of a vinyl chloride backing layer and carpet layer of a tile carpet. タイルカーペットから塩化ビニル裏打ち層を分離回収する工程の一例を示す断面図。Sectional drawing which shows an example of the process of isolate | separating and collect | recovering a vinyl chloride backing layer from a tile carpet.

符号の説明Explanation of symbols

１ 加熱されたタイルカーペット
２ 回転差のある一対のロール
２−１ 回転の遅い方のロール
２−２ 回転の速い方のロール
３ カーペット層
４ 塩化ビニル裏打ち層
５ 加熱炉
６ コンベア
７ 分離工程
８ スクレイバーブレード

DESCRIPTION OF SYMBOLS 1 Heated tile carpet 2 A pair of rolls with a rotation difference 2-1 Roll with slow rotation 2-2 Roll with fast rotation 3 Carpet layer 4 Vinyl chloride backing layer 5 Heating furnace 6 Conveyor 7 Separation process 8 Labor blade

Claims (1)

１．２〜５倍の回転差を有する一対のロールの隙間をカーペット層と塩化ビニル裏打ち層からなるタイルカーペットの塩化ビニル裏打ち層の厚さ以下に絞り、１００〜１７０℃に加熱したタイルカーペットを、該一対のロールのうち速い方のロール側に塩化ビニル裏打ち層が来るようにして前記隙間に通すことにより、カーペット層と塩化ビニル裏打ち層の境界面に層間のずれを生じさせ、剥離を起こさせることを特徴とするタイルカーペットから塩化ビニル裏打ち層を分離回収する方法。 A tile carpet heated to 100-170 ° C. , with the gap between a pair of rolls having a rotational difference of 1.2 to 5 times reduced to the thickness of the vinyl chloride backing layer of the tile carpet composed of the carpet layer and the vinyl chloride backing layer By passing the vinyl chloride backing layer through the gap so that the faster side of the pair of rolls comes to the side of the pair of rolls, a slippage between the carpet layer and the vinyl chloride backing layer is caused and peeling occurs. A method for separating and recovering a vinyl chloride backing layer from a tile carpet.
JP2003271585A 2002-11-01 2003-07-07 Method for separating and recovering vinyl chloride backing layer from tile carpet Expired - Fee Related JP4126340B2 (en)

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JP4863252B2 (en) * 2004-09-21 2012-01-25 株式会社タジマ Fiber forming layer material or block or elongate sheet material and method of using the same
US8500047B2 (en) * 2008-11-14 2013-08-06 Chengjin Yu Method of removing backing adhesive of carpet and the device thereof
US8864057B2 (en) * 2011-11-04 2014-10-21 Shaw Industries Group, Inc. Processes for recycling carpet and products of such processes
JP5681317B1 (en) * 2013-11-13 2015-03-04 裕 赤星 Manufacturing method of regenerated powder and regenerated fiber
US11364661B2 (en) 2016-04-20 2022-06-21 Broadview Group International, Llc Processes and structures for recycling carpet and products of such processes
DE102018101176A1 (en) * 2018-01-19 2019-07-25 Adler Pelzer Holding Gmbh Process for recovering fibers
WO2025158502A1 (en) * 2024-01-22 2025-07-31 本田技研工業株式会社 Carbon fiber bundle regeneration method and carbon fiber bundle regeneration device

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