JP2005288897A - Regenerated molded product - Google Patents

Regenerated molded product Download PDF

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JP2005288897A
JP2005288897A JP2004107567A JP2004107567A JP2005288897A JP 2005288897 A JP2005288897 A JP 2005288897A JP 2004107567 A JP2004107567 A JP 2004107567A JP 2004107567 A JP2004107567 A JP 2004107567A JP 2005288897 A JP2005288897 A JP 2005288897A
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molded body
crushed pieces
shaped
crushed
surface side
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JP4309793B2 (en
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Yasuhiro Saito
康宏 斉藤
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Sekisui Chemical Co Ltd
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    • 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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  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a regenerated molded product having sufficient strength and rigidity by recycling a waste structure formed of a fiber reinforced molding material in a high speed producible manner. <P>SOLUTION: The regenerated molded product is formed by press-molding a plate-shaped aggregate of broken pieces, wherein a binder is bonded to the surfaces of the elongated chip-like broken pieces obtained by crushing a structure formed by a fiber reinforced molding material, in a thickness direction and the surface side in the wall thickness direction of the regenerated molded product is shaped so that the aggregate is shaped long in an orientation direction while orienting the longitudinal direction of the broken pieces in the same direction and the central part in a wall thickness direction of the regenerated molded product is formed so that the longitudinal direction of the broken pieces are shaped in a random direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は繊維強化成形材を素材とする構造体をリサイクルして製される再生成形体に関する。   The present invention relates to a recycled molded body produced by recycling a structure made of a fiber reinforced molding material.

近時、鉄道の軌道に用いられる枕木や傾斜地の崖崩れを防止するための受圧板、あるいは、水槽や水路に架設される覆蓋などには、木材に代えて耐腐食性や強度に優れた合成木材が多用されている。
合成木材は、長手方向に配向されたガラス繊維などで補強された硬質合成樹脂発泡体を素材としたもので、軽量で耐腐食性が高く長期の使用に耐えるものである。 Synthetic materials with excellent corrosion resistance and strength instead of wood for sleepers used on railway tracks, pressure plates to prevent landslides on slopes, and cover lids installed in water tanks and waterways. Wood is heavily used.
Synthetic wood is made of a hard synthetic resin foam reinforced with glass fibers or the like oriented in the longitudinal direction, and is lightweight, highly resistant to corrosion, and can withstand long-term use.

ところで、合成木材はガラス繊維などの強化繊維を多量に含むため、廃材となった合成木材をそのまま廃棄することが困難であった。このため、ガラス繊維などの含有量の低減やリサイクル方法の開発が検討されている。   By the way, since synthetic wood contains a large amount of reinforcing fibers such as glass fibers, it has been difficult to dispose of the used synthetic wood as it is. For this reason, the reduction of the content of glass fibers and the development of recycling methods are being studied.

上記に関し、特許文献１には、出願人より、繊維強化成形材で製された構造体を破砕して得られる細長いチップ状の破砕片の表面に結合剤を付着させ、当該破砕片の長手方向を同一方向に引き揃えて配向しつつ破砕片による集合体が配向方向へ長尺となるように板状に整形し、整形された破砕片の板状の集合体を厚さ方向にプレス成形して形成されることを特徴とする再生成形材などが記載されている。   With regard to the above, Patent Document 1 discloses that the applicant attaches a binder to the surface of an elongated chip-shaped crushed piece obtained by pulverizing a structure made of fiber-reinforced molding material, and the longitudinal direction of the crushed piece. The aggregates of the crushed pieces are shaped into a plate shape so that the aggregates of the crushed pieces are elongated in the orientation direction while being aligned in the same direction, and the plate-like aggregates of the crushed pieces are pressed in the thickness direction. Recycled molding materials characterized by being formed are described.

上記によれば、繊維強化成形材で製された廃棄構造体を再利用して充分な強度、剛性を有する再生成形材などを提供することを可能ならしめるものである。   According to the above, it is possible to provide a recycled molding material having sufficient strength and rigidity by reusing a waste structure made of a fiber reinforced molding material.

しかしながら、本発明者による更なる検討によれば、上記のようにチップ状の破砕片の長手方向を同一方向に引き揃えて配向するには、成形工程において破砕片を配向するために必要な時間（以下、「配向時間」ともいう）が長くかかる場合があり、必ずしも良好な成形速度が得られないことがあった。このため、高速で生産可能であり且つ十分な強度、剛性を有する再生成形体が要望されていた。
特願２００３−１３７５５８号公報 However, according to further studies by the present inventor, in order to align the longitudinal direction of the chip-shaped crush pieces in the same direction as described above, the time required for orienting the crush pieces in the molding process (Hereinafter also referred to as “orientation time”) may take a long time, and a good molding speed may not always be obtained. For this reason, there has been a demand for a regenerated molded body that can be produced at high speed and has sufficient strength and rigidity.
Japanese Patent Application No. 2003-137558

本発明の目的は、上記のような実情に鑑みてなされたもので、繊維強化成形材で製された廃棄構造体を再利用して充分な強度、剛性を有する再生成形体を提供するものであって、且つ高速で生産可能な再生成形体を提供することにある。   The object of the present invention has been made in view of the above circumstances, and provides a recycled molded body having sufficient strength and rigidity by reusing a waste structure made of a fiber-reinforced molding material. Another object of the present invention is to provide a regenerated molded body that can be produced at high speed.

請求項１記載の再生成型体は、繊維強化成形材で製された構造体を破砕して得られる細長いチップ状の破砕片の表面に結合剤を付着させた破砕片の板状の集合体が厚さ方向にプレス成形された再生成形体であって、再生成形体の肉厚方向における表面側は、破砕片の長手方向を同一方向に引き揃えて配向しつつ集合体が配向方向へ長尺となるように整形され、再生成形体の肉厚方向における中央部分は、破砕片の長手方向がランダムな方向に整形されてなることを特徴とする。   The reclaimed molded body according to claim 1 is a plate-like aggregate of crushed pieces in which a binder is attached to the surface of an elongated chip-shaped crushed piece obtained by crushing a structure made of a fiber-reinforced molding material. Recycled molded product that is press-molded in the thickness direction, and the surface side in the thickness direction of the regenerated molded product is aligned with the longitudinal direction of the crushed pieces aligned in the same direction, and the aggregate is elongated in the alignment direction. The central part in the thickness direction of the regenerated molded body is characterized in that the longitudinal direction of the crushed pieces is shaped in a random direction.

以下、本発明を詳細に説明する。
通常、繊維強化成形材を破砕すると、繊維の周りに樹脂材が固着した細長いチップ状の破砕片や、樹脂だけが粉末状に粉砕された破砕物が生じる。本発明によれば、これらの破砕物のうち、粉末状に破砕された樹脂の破砕物は用いずに、繊維を含んだ細長いチップ状の破砕片のみを選択的に再利用して新たな成形材を再生するものである。 Hereinafter, the present invention will be described in detail.
Usually, when a fiber reinforced molding material is crushed, a slender chip-like crushed piece in which a resin material is fixed around the fiber or a crushed product in which only the resin is pulverized into a powder form are generated. According to the present invention, among these crushed materials, a new molding is performed by selectively reusing only the elongated chip-shaped crushed pieces containing fibers without using the crushed resin crushed into powder. Recycle the material.

本発明において、繊維強化成形体で製された構造体を破砕する装置には種々のものがある。例えば、回転刃を有するローラで構造体を破砕する一軸破砕機や、回転刃を有する平行に配された一対のローラの間に構造体を通過させることにより双方の回転刃を構造体に噛み込ませて破砕する２軸破砕機などを採用することができる。また、破砕物から所定範囲の厚さ、幅および長さを有する細長いチップ状の破砕片を選別する装置としては、例えば、ウェーブローラ方式の分級機を挙げることができる。ウェーブローラ方式の分級機は、破砕物の厚さや幅を基準にして連続的に分級する装置であり、区分された破砕物から所定範囲の厚さ、幅および長さを有する細長いチップ状の破砕片を選別することができる。   In the present invention, there are various apparatuses for crushing a structure made of a fiber-reinforced molded body. For example, a uniaxial crusher that crushes a structure with a roller having a rotary blade or a structure that passes between a pair of rollers arranged in parallel with a rotary blade so that both rotary blades are engaged with the structure. A biaxial crusher or the like for crushing can be employed. In addition, as an apparatus for sorting elongated chip-shaped crushed pieces having a predetermined range of thickness, width and length from crushed materials, for example, a wave roller type classifier can be used. A wave roller type classifier is a device that continuously classifies on the basis of the thickness and width of the crushed material. Pieces can be sorted out.

選別された破砕片に結合剤を付着させるには、例えば、コンベア上やドラムブレンダー内などに投入した破砕片に結合剤を噴霧して、破砕片の表面に結合剤を均一に付着させる方法を採ることができる。   In order to attach the binder to the selected crushed pieces, for example, a method in which the binder is sprayed on the crushed pieces put on a conveyor or in a drum blender to uniformly adhere the binder to the surface of the crushed pieces. Can be taken.

プレス成形は、例えば、破砕片の板状の集合体を両面から加熱しつつ加圧して行われ、所定サイズの再生成形体を得ることができる。このときの加圧時間は反発力の緩和時間と結合剤（接着剤）の硬化時間に応じて定められる。ここで、反発力とは、再生成形体が所定密度まで圧縮されたときに、プレス板が再生成形体から受ける反発力である。加熱方法には、プレス板を加熱することによって再生成形体を加熱する方法や、スチームや電磁波を用いて再生成形体の内部を直接加熱する方法があり、内部を直接加熱する後者の方法によれば成形時間が短縮され作業効率が向上する。   The press molding is performed, for example, by pressing a plate-like aggregate of crushed pieces while heating from both sides, whereby a regenerated molded body having a predetermined size can be obtained. The pressing time at this time is determined according to the repulsive force relaxation time and the binder (adhesive) curing time. Here, the repulsive force is a repulsive force that the press plate receives from the regenerated molded body when the regenerated molded body is compressed to a predetermined density. The heating method includes a method of heating the regenerated molded body by heating a press plate and a method of directly heating the interior of the regenerated molded body using steam or electromagnetic waves, and the latter method of directly heating the interior. As a result, the molding time is shortened and the working efficiency is improved.

本発明においては、上記再生成形体の肉厚方向における表面側は、破砕片の長手方向を同一方向に引き揃えて配向しつつ集合体が配向方向へ長尺となるように整形される。   In the present invention, the surface side in the thickness direction of the regenerated molded body is shaped so that the aggregate is elongated in the orientation direction while aligning the longitudinal directions of the crushed pieces in the same direction.

上記破砕片をその長手方向に引き揃えて配向させるには種々の方法を採ることができる。例えば、破砕片を成形金型やコンベア上に落下させる際に、所定の幅および長さを有する櫛状のスリットを通して配向させる方法や、ランダムに配向した破砕片の集合体をディスク状のスリットを通すことで配向させる方法などを採ることができる。また、木質系成形材の製造に用いられるディスクオリエンターなどを用いることも可能である。則ち、破砕片を落下させる際にディスクオリエンターによって成形ライン方向に破砕片の長手方向を引き揃えて配向させることができる。   Various methods can be employed to align the crushed pieces in the longitudinal direction. For example, when dropping shredded pieces onto a molding die or a conveyor, a method of orienting through a comb-shaped slit having a predetermined width and length, or an assembly of randomly oriented shredded pieces with a disk-shaped slit The method of orienting by passing can be adopted. It is also possible to use a disk orienter used for manufacturing a wood-based molding material. That is, when the crushed pieces are dropped, the longitudinal direction of the crushed pieces can be aligned and oriented in the molding line direction by the disc orienter.

また、本発明においては、再生成形体の肉厚方向における中央部分は、破砕片の長手方向がランダムな方向に整形されてなる。   Moreover, in this invention, the longitudinal direction of the crushing piece is shape | molded in the random direction in the center part in the thickness direction of a reproduction | regeneration molded object.

上記のような再生成形体を得る方法としては、特に限定されるものではないが、例えば、複数のディスクが所定の間隔で配置されたディスクオリエンターなどの配向装置を用い、結合剤を塗布した破砕片を、配向装置を介して同一方向に引き揃えつつ成形金型に投入して肉厚方向における表面側の集合体を形成した後、配向装置を一旦外し、配向装置を介さずに破砕片を投入して、破砕片の長手方向がランダムな方向に整形された肉厚方向における中央部分の集合体を形成し、再び配向装置を介して破砕片を投入してもう一方の表面側の集合体を形成した後、成形金型をプレス装置に挿入して加熱しつつ加圧することで再生成形体を得ることができる。   The method for obtaining the regenerated molded body as described above is not particularly limited. For example, a binding agent is applied using an orientation device such as a disk orienter in which a plurality of disks are arranged at predetermined intervals. The crushed pieces are thrown into the molding die while being aligned in the same direction through the aligning device to form the aggregate on the surface side in the thickness direction, and then the aligning device is removed and the crushed pieces are not passed through the aligning device. To form the aggregate of the central part in the thickness direction in which the longitudinal direction of the crushed pieces is shaped in a random direction, and again throw the crushed pieces through the orientation device to collect on the other surface side After forming the body, a remolded body can be obtained by inserting the molding die into a press device and applying pressure while heating.

また、結合剤を塗布した破砕片を、配向装置を介して同一方向に引き揃えつつ成形金型に投入して肉厚方向における表面側の集合体を形成した後、配向装置を一旦外し、配向装置を介さずに破砕片を投入して、破砕片の長手方向がランダムな方向に整形された集合体を形成した後に第一のプレス成形をし、得られた２層成形品を２枚用いて、破砕片がランダムな方向に整形された側が接するように重ね合わせ第二のプレス成形をすることで、肉厚方向における中央部分の破砕片がランダムに配向され、表面側の破砕片が同一方向に引き揃えて配向された上記再生成形体を得ることもできる。   In addition, the crushed pieces coated with the binder were put into a molding die while being aligned in the same direction via the aligning device to form an aggregate on the surface side in the thickness direction, and then the aligning device was removed once to align After putting the crushed pieces without going through the apparatus to form an assembly in which the longitudinal direction of the crushed pieces is shaped in a random direction, the first press molding is performed, and two obtained two-layer molded products are used. Then, by pressing the second piece so that the side of the crushed piece shaped in a random direction touches, the crushed piece at the center in the thickness direction is randomly oriented, and the crushed piece on the surface side is the same It is also possible to obtain the reclaimed molded body that is aligned by being oriented in the direction.

本発明の再生成形体は、上記のように、表面側では破砕片が一方向に配向され高い強度や剛性の発現に寄与することができるとともに、肉厚方向の中央部分では、成形工程での配向時間を要せず、成形速度の向上に寄与することができる。このため充分な強度、剛性を有しつつも高速で生産可能な再生成形体を提供することができる。   As described above, the reclaimed molded body of the present invention can contribute to the development of high strength and rigidity with the crushed pieces oriented in one direction on the surface side, and in the central part in the thickness direction, It does not require alignment time and can contribute to improvement of the molding speed. Therefore, it is possible to provide a reclaimed molded body that can be produced at high speed while having sufficient strength and rigidity.

本発明の再生成形体において、肉厚方向における表面側の重量としては、各々再生成形体全体の重量に対する重量比（表面側の重量／再生成形体全体の重量）において２０〜４０％であることが好ましい。表面側の重量が少なすぎると、充分な強度、剛性などの品質が得られないことがあり、重量が大きすぎると成形工程での配向時間が長くなりすぎて十分な成形速度が得られず、良好な生産性（コスト）が得られないことがある。   In the regenerated molded article of the present invention, the weight on the surface side in the thickness direction is 20 to 40% in the weight ratio to the total weight of the regenerated molded article (weight on the surface side / total weight of the regenerated molded article). Is preferred. If the weight on the surface side is too small, quality such as sufficient strength and rigidity may not be obtained, and if the weight is too large, the orientation time in the molding process becomes too long and sufficient molding speed cannot be obtained, Good productivity (cost) may not be obtained.

換言すると、本発明によれば、求められる品質や生産性（コスト）に応じて、適宜表面側の厚みを設計することが可能であり、品質と生産性（コスト）のバランスが最適な再生成形体を提供することが可能となる。   In other words, according to the present invention, the thickness on the surface side can be appropriately designed according to the required quality and productivity (cost), and the regenerative molding has an optimal balance between quality and productivity (cost). The body can be provided.

本発明における破砕片の形状としては、繊維強化された方向が長軸方向の細長いチップ状であれば特に限定されないが、チップの長軸と短軸の比が２以上であることが好ましい。この比が２に満たない場合は、表面側において配向させる方向が定まり難くなることがあり、得られる再生成形体の品質が不十分になることがある。   The shape of the crushed pieces in the present invention is not particularly limited as long as the fiber-reinforced direction is an elongated chip shape in the major axis direction, but the ratio of the major axis to the minor axis of the chip is preferably 2 or more. When this ratio is less than 2, the orientation direction on the surface side may be difficult to be determined, and the quality of the obtained recycled molded product may be insufficient.

本発明において破砕する構造体の素材である繊維強化成形材（ＦＲＰ）は特に限定されないが、再生成形体を強度の要求される構造材として用いる場合は熱硬化性硬質樹脂が好ましい。具体的には、ポリウレタン樹脂、フェノール樹脂、不飽和ポリエステル樹脂、ジアリルフタレート樹脂、ビニルエステル樹脂、エポキシ樹脂、ウレア樹脂、メラミン樹脂、ポリイミド樹脂、ポリアミドイミド樹脂、アクリル樹脂などが挙げられ、これらの樹脂が助剤などを用いて発泡したものでも良い。特に軽量かつ高強度な再生成形体を得るためには硬質ポリウレタン樹脂の発泡体が好ましい。   In the present invention, the fiber reinforced molding material (FRP), which is a material of the structure to be crushed, is not particularly limited. However, when the recycled molded body is used as a structural material requiring strength, a thermosetting hard resin is preferable. Specific examples include polyurethane resins, phenol resins, unsaturated polyester resins, diallyl phthalate resins, vinyl ester resins, epoxy resins, urea resins, melamine resins, polyimide resins, polyamideimide resins, acrylic resins, and the like. May be foamed using an auxiliary agent. In particular, in order to obtain a light-weight and high-strength recycled molded body, a foam of a hard polyurethane resin is preferable.

また、破砕する繊維強化成形材に含まれる繊維は、補強繊維としての機能を有していればその形状は限定されず、例えば、モノフィラメント、フィブリル化繊維素（髭状の繊維が突き出たもの）、織り糸などが挙げられる。また、補強繊維は、例えば、ガラス繊維だけでも良く、ガラス繊維に炭素繊維や合成繊維などの補強繊維が複合されたものでも良い。   In addition, the shape of the fiber contained in the fiber-reinforced molding material to be crushed is not limited as long as it has a function as a reinforcing fiber. For example, monofilaments and fibrillated fiber elements (those protruding from cocoon-like fibers) And weaving yarns. Further, the reinforcing fiber may be, for example, only glass fiber, or may be a composite of glass fiber and reinforcing fiber such as carbon fiber or synthetic fiber.

本発明で用いる結合剤は特に限定されないが、フェノール、尿素、イソシアネート、ウレタン、エポキシ、その他木材工業用などに用いられる樹脂系接着剤が挙げられ、それらを単独または複数併用して用いることができる。また、結合剤の量は、破砕片の形状、表面性状、密度にもよるが、通常、破砕片の重量に対して１〜２０重量％を付着させるのが好ましい。特に、再生成形体を軽量化するためには、できるだけ少量の結合剤を破砕片に均一に塗布することが好ましく、低粘度のイソシアネートが好適である。   The binder used in the present invention is not particularly limited, and examples thereof include phenol, urea, isocyanate, urethane, epoxy, and other resin adhesives used for the wood industry, and these can be used alone or in combination. . Moreover, although the quantity of a binder is based also on the shape, surface property, and density of a crushing piece, it is preferable to attach 1 to 20 weight% normally with respect to the weight of a crushing piece. In particular, in order to reduce the weight of the regenerated molded body, it is preferable to apply as little binder as possible to the crushed pieces, and low-viscosity isocyanate is suitable.

本発明の再生成形体は、繊維強化成形材で製された構造体を破砕して得られる細長いチップ状の破砕片の表面に結合剤を付着させた破砕片の板状の集合体が厚さ方向にプレス成形された再生成形体であって、再生成形体の肉厚方向における表面側は、破砕片の長手方向を同一方向に引き揃えて配向しつつ集合体が配向方向へ長尺となるように整形され、再生成形体の肉厚方向における中央部分は、破砕片の長手方向がランダムな方向に整形されてなるので、表面側では破砕片が一方向に配向され高い強度や剛性の発現に寄与することができるとともに、肉厚方向の中央部分では、成形工程での配向時間を要せず、成形速度の向上に寄与することができる。このため充分な強度、剛性を有しつつも高速で生産可能な再生成形体を提供することができる。   The reclaimed molded product of the present invention has a plate-like aggregate of crushed pieces in which a binder is attached to the surface of an elongated chip-like crushed piece obtained by crushing a structure made of fiber-reinforced molding material. Recycled molded body press-molded in the direction, the surface side in the thickness direction of the regenerated molded body is aligned with the longitudinal direction of the crushed pieces aligned in the same direction, and the aggregate is elongated in the alignment direction The central part in the thickness direction of the recycled molded body is shaped in a random direction in the longitudinal direction of the crushed pieces, so that the crushed pieces are oriented in one direction on the surface side and high strength and rigidity are exhibited. In addition, the center portion in the thickness direction does not require the alignment time in the molding process, and can contribute to the improvement of the molding speed. Therefore, it is possible to provide a reclaimed molded body that can be produced at high speed while having sufficient strength and rigidity.

以下に実施例および比較例を示すことにより、本発明を更に具体的に説明する。
尚、本発明は下記実施例のみに限定されるものではない。 Hereinafter, the present invention will be described more specifically by showing examples and comparative examples.
In addition, this invention is not limited only to the following Example.

（実施例１）
廃棄する構造体としてガラス長繊維強化硬質ウレタン樹脂発泡体を素材とする合成木材（積水化学工業株式会社製 エスロンネオランバーＦＦＵ７４）を用いた。まず、廃棄する構造体の破砕工程では、上記合成木材を２軸破砕機を用いて破砕した。そして、破砕物をウェーブローラ方式の分級機に投入して分級し、厚さおよび幅が０．５ｍｍ以上１０ｍｍ未満、長さが１０ｍｍ以上２００ｍｍ未満の細長いチップ状の破砕片を選別した。選別した破砕片の密度は０．５ｇ／ｃｍ3〜０．８ｇ／ｃｍ3であった。 (Example 1)
As a structure to be discarded, synthetic wood (Eslon Neo Lumber FFU74 manufactured by Sekisui Chemical Co., Ltd.) made of a long glass fiber reinforced rigid urethane resin foam was used. First, in the crushing process of the structure to be discarded, the synthetic wood was crushed using a biaxial crusher. The crushed material was put into a wave roller classifier and classified, and elongated chip-shaped crushed pieces having a thickness and width of 0.5 mm to less than 10 mm and a length of 10 mm to less than 200 mm were selected. Density of sorted fragments was 0.5g / cm 3 ~0.8g / cm 3 .

次に、結合剤付着工程では、ドラムブレンダー内に破砕片と共に結合剤（ＭＤＩ：Ｍｅｔｈｙｌｅｎｅ Ｄｉｐｈｅｎｙｌ Ｉｓｏｃｙａｎａｔｅ．住化バイエルウレタン株式会社製「スミジュール４４Ｖ１０」を破砕片の総量に対して１０重量％投入し、回転撹拌して破砕片の表面に結合剤を均一に塗布した。   Next, in the binder adhering step, 10% by weight of a binder (MDI: Methylene Diphenyl Isosorbate. Sumika Bayer Urethane Co., Ltd. "Sumidur 44V10") is put into the drum blender together with the crushed pieces. The binder was uniformly applied to the surface of the crushed pieces by rotating and stirring.

次いで、複数のディスクを１０ｍｍ間隔で配置したディスクオリエンターを用い、上記により得られた結合剤を塗布した破砕片を、ディスクオリエンターの上部に配置されたベルトコンベアから落下させ、ディスクオリエンターを介して破砕片の長手方向が長尺となるように成形金型に投入して肉厚方向における第一の表面側の集合体を形成した。   Next, using a disc orienter in which a plurality of discs are arranged at intervals of 10 mm, the crushed pieces coated with the binder obtained as described above are dropped from a belt conveyor arranged on the top of the disc orienter, and the disc orienter is removed. Then, it was put into a molding die so that the longitudinal direction of the crushed pieces was long, and an aggregate on the first surface side in the thickness direction was formed.

その後、ディスクオリエンターを一旦スライドして外し、上記同様にベルトコンベアから破砕片を落下させ、上記成形金型に投入して、破砕片の長手方向がランダムな方向に整形された肉厚方向における中央部分の集合体を形成した。   Thereafter, the disk orienter is slid once and removed, and the crushed pieces are dropped from the belt conveyor in the same manner as described above, and the crushed pieces are placed in the molding die in the thickness direction in which the longitudinal direction of the crushed pieces is shaped in a random direction. A central part assembly was formed.

次に、上記ディスクオリエンターをスライドバックして再配置し、上記同様にベルトコンベアから破砕片を落下させ、ディスクオリエンターを介して破砕片の長手方向が長尺となるように成形金型に投入して肉厚方向における第二の表面側の集合体を形成した。   Next, the disk orienter is slid back and rearranged, and the crushed pieces are dropped from the belt conveyor in the same manner as described above, and the longitudinal direction of the crushed pieces becomes long through the disk orienter. An aggregate on the second surface side in the thickness direction was formed.

上記により得られた、第一の表面側、中央部分、及び第二の表面側からなる３層構成の集合体が形成された成形金型をプレス装置に挿入して１８０℃で１時間加熱しつつ加圧し、厚さ７０ｍｍ、幅２３０ｍｍ、長さ２ｍの再生成形体を得た。得られた３層構成の再生成形体における各層の重量比は、再生成形体の全体の重量に対して、第一の表面側が３０％、中央部分が４０％、第二の表面側が３０％であった。   The molding die formed with the three-layered assembly composed of the first surface side, the central portion, and the second surface side obtained as described above was inserted into a press apparatus and heated at 180 ° C. for 1 hour. While being pressurized, a reclaimed molded body having a thickness of 70 mm, a width of 230 mm, and a length of 2 m was obtained. The weight ratio of each layer in the obtained three-layered recycled molded body was 30% on the first surface side, 40% on the center portion, and 30% on the second surface side with respect to the total weight of the recycled molded body. there were.

（実施例２）
３層構成の再生成形体における各層の重量比が、再生成形体の全体の重量に対して、第一の表面側が２５％、中央部分が５０％、第二の表面側が２５％となるようにしたこと以外は実施例１と同様にして再生成形体を得た。 (Example 2)
The weight ratio of each layer in the three-layer recycled molded body is such that the first surface side is 25%, the central portion is 50%, and the second surface side is 25% with respect to the total weight of the recycled molded body. A recycled molded body was obtained in the same manner as in Example 1 except that.

（実施例３）
３層構成の再生成形体における各層の重量比が、再生成形体の全体の重量に対して、第一の表面側が３５％、中央部分が３０％、第二の表面側が３５％となるようにしたこと以外は実施例１と同様にして再生成形体を得た。
（実施例４）
３層構成の再生成形体における各層の重量比が、再生成形体の全体の重量に対して、第一の表面側が１５％、中央部分が７０％、第二の表面側が１５％となるようにしたこと以外は実施例１と同様にして再生成形体を得た。 (Example 3)
The weight ratio of each layer in the three-layer recycled molded body is such that the first surface side is 35%, the central portion is 30%, and the second surface side is 35% with respect to the total weight of the recycled molded body. A recycled molded body was obtained in the same manner as in Example 1 except that.
Example 4
The weight ratio of each layer in the three-layered recycled molded body is such that the first surface side is 15%, the central portion is 70%, and the second surface side is 15% with respect to the total weight of the recycled molded body. A recycled molded body was obtained in the same manner as in Example 1 except that.

（比較例１）
ディスクオリエンターを取り外すことなく、破砕片をディスクオリエンターの上部に配置されたベルトコンベアから落下させ、ディスクオリエンターを介して、肉厚方向の全ての部分において、破砕片の長手方向が長尺となるように成形金型に投入して集合体を形成したこと以外は実施例１と同様にして、実施例１と同形状（厚さ７０ｍｍ、幅２３０ｍｍ、長さ２ｍ）の再生成形体を得た。 (Comparative Example 1)
Without removing the disk orienter, the crushed pieces are dropped from the belt conveyor placed at the top of the disk orienter, and the longitudinal direction of the crushed pieces is long in all the thickness direction through the disk orienter. A recycled molded body having the same shape as in Example 1 (thickness 70 mm, width 230 mm, length 2 m) was obtained in the same manner as in Example 1 except that the assembly was formed by charging into a molding die so that Obtained.

上記実施例及び比較例について以下の評価を行った。評価結果は表１に示した。
（配向時間）
ディスクオリエンターを介して、第一の表面側を形成し、ディスクオリエンターを外して中央部分を形成し、再びディスクオリエンターを配置して第二の表面側を形成するのに要した時間を、第一及び第２の表面側の重量で除した値を求めた。尚、比較例１においては、肉厚方向の全ての部分を形成するのに要した時間を、再生成形体全体の重量で除した値を求めた。
（生産性）
上記配向時間について、比較例１に対する各々の百分率を求めた。値の小さい方が、成形速度が早く生産性に優れていることを意味する。
（曲げ強度）
上記により得られた再生成形体について、スパン９８０ｍｍ（厚さ７０ｍｍ）の３点曲げ試験を行い曲げ強度を求めた。 The following evaluation was performed about the said Example and comparative example. The evaluation results are shown in Table 1.
(Orientation time)
The time required to form the first surface side through the disc orienter, remove the disc orienter to form the central portion, and place the disc orienter again to form the second surface side. The value divided by the weight on the first and second surface sides was determined. In Comparative Example 1, a value obtained by dividing the time required to form all the portions in the thickness direction by the weight of the entire recycled molded body was obtained.
(productivity)
With respect to the alignment time, each percentage with respect to Comparative Example 1 was determined. A smaller value means faster molding speed and better productivity.
(Bending strength)
The regenerated molded body obtained above was subjected to a three-point bending test with a span of 980 mm (thickness: 70 mm) to determine the bending strength.

Figure 2005288897
Figure 2005288897

表１より明らかなように、本発明の実施例においては、良好な曲げ強度を有つつも配向速度の向上が図れ、高い生産性を発揮し得ることが判明した。   As is clear from Table 1, in the examples of the present invention, it was found that the orientation rate can be improved and high productivity can be exhibited while having good bending strength.

Claims (1)

繊維強化成形材で製された構造体を破砕して得られる細長いチップ状の破砕片の表面に、結合剤を付着させた破砕片の板状の集合体が厚さ方向にプレス成形された再生成形体であって、再生成形体の肉厚方向における表面側は、破砕片の長手方向を同一方向に引き揃えて配向しつつ集合体が配向方向へ長尺となるように整形され、再生成形体の肉厚方向における中央部分は、破砕片の長手方向がランダムな方向に整形されてなることを特徴とする再生成型体。
Regeneration in which a plate-like assembly of crushed pieces with a binder attached is press-formed in the thickness direction on the surface of elongated chip-shaped crushed pieces obtained by crushing a structure made of fiber-reinforced molding material The molded body, the surface side in the thickness direction of the recycled molded body is shaped so that the aggregate is elongated in the orientation direction while aligning the longitudinal direction of the crushed pieces in the same direction, and then recycled molded A reclaimed molded body characterized in that the central part in the thickness direction of the body is formed by shaping the longitudinal direction of the crushed pieces in a random direction.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05138797A (en) * 1991-11-19 1993-06-08 Nhk Spring Co Ltd Composite material
JP2002192543A (en) * 2000-12-25 2002-07-10 Asahi Fiber Glass Co Ltd Manufacturing method for fiber-reinforced thermoplastic resin moldings using industrial waste
JP2002322602A (en) * 2001-04-24 2002-11-08 Dainippon Ink & Chem Inc Pavement material of floor material and manufacturing method thereof
JP2004148796A (en) * 2002-09-03 2004-05-27 Sekisui Chem Co Ltd Production method for recycled forming material, forming material, recycled structural material, synthetic railroad tie and lightweight synthetic wood
JP2005082802A (en) * 2003-09-05 2005-03-31 Gomisho:Kk Recycled product using waste textile material as reinforcing material and method for producing the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05138797A (en) * 1991-11-19 1993-06-08 Nhk Spring Co Ltd Composite material
JP2002192543A (en) * 2000-12-25 2002-07-10 Asahi Fiber Glass Co Ltd Manufacturing method for fiber-reinforced thermoplastic resin moldings using industrial waste
JP2002322602A (en) * 2001-04-24 2002-11-08 Dainippon Ink & Chem Inc Pavement material of floor material and manufacturing method thereof
JP2004148796A (en) * 2002-09-03 2004-05-27 Sekisui Chem Co Ltd Production method for recycled forming material, forming material, recycled structural material, synthetic railroad tie and lightweight synthetic wood
JP2005082802A (en) * 2003-09-05 2005-03-31 Gomisho:Kk Recycled product using waste textile material as reinforcing material and method for producing the same

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