JPH06345499A - Method for recovering glass from laminated glass - Google Patents
Method for recovering glass from laminated glassInfo
- Publication number
- JPH06345499A JPH06345499A JP13725893A JP13725893A JPH06345499A JP H06345499 A JPH06345499 A JP H06345499A JP 13725893 A JP13725893 A JP 13725893A JP 13725893 A JP13725893 A JP 13725893A JP H06345499 A JPH06345499 A JP H06345499A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- laminated glass
- intermediate film
- laminated
- recovering
- 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.)
- Pending
Links
Classifications
-
- 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
- B29K2029/00—Use of polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals or derivatives thereof as moulding 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
- B29L2031/778—Windows
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、合わせガラスからガラ
スを回収する方法に関する。さらに詳しくは、車輌用や
建築用の平板等に用いられる合わせガラスのガラスと中
間膜とを分離してガラスを回収し、ガラスを再利用でき
るようにする方法に関する。FIELD OF THE INVENTION The present invention relates to a method for recovering glass from laminated glass. More specifically, the present invention relates to a method for recovering glass by separating the glass and the interlayer film of laminated glass used for flat plates for vehicles and constructions so that the glass can be reused.
【０００２】[0002]
【従来の技術】建築物の窓ガラス、自動車のフロントガ
ラス等の安全ガラスに用いられている合わせガラスは、
２枚のガラス板の間に合わせガラス用中間膜を配置して
形成される。その中間膜としては、ポリビニルブチラー
ル樹脂等の熱可塑性樹脂からなる膜が一般的に使用され
ている。2. Description of the Related Art Laminated glass used for safety glass such as building window glass and automobile windshield is
It is formed by disposing an interlayer film for laminated glass between two glass plates. As the intermediate film, a film made of a thermoplastic resin such as polyvinyl butyral resin is generally used.
【０００３】ところで、寸法、外観の不具合等で不要と
なった合わせガラスは、市場より回収された後、ガラス
板と中間膜を容易に分離することができないために、そ
のほとんどは地中に埋められる。また、合わせガラスを
粉砕した後のガラス片が付着した中間膜については、焼
却等による廃棄処分が行われている。By the way, most of the laminated glass, which is no longer needed due to its size and appearance, is buried in the ground because the glass plate and the interlayer film cannot be easily separated after being collected from the market. To be In addition, the intermediate film to which the glass pieces after crushing the laminated glass are attached is disposed of by incineration or the like.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記のよう
に、不要となった合わせガラスを地中に埋めると、環境
破壊の問題を招来する。また、ガラス片が付着した中間
膜を焼却処分すると、未溶解のガラスがガラス粉塵とな
って大気を汚染するという問題がある。一方、溶融した
ガラスは燃焼ストーカに堆積して燃焼装置の運転に支障
をきたす等の問題がある。However, as described above, if the unnecessary laminated glass is buried in the ground, it causes a problem of environmental destruction. Further, when the intermediate film having glass pieces attached thereto is incinerated, there is a problem that unmelted glass becomes glass dust and pollutes the atmosphere. On the other hand, there is a problem that the molten glass is deposited on the combustion stoker and interferes with the operation of the combustion device.
【０００５】そこで、従来より合わせガラスからガラス
を回収する方法が種々提案されているが、例えば合わせ
ガラスをガラスの軟化点以下の温度に加熱して中間膜を
燃焼させてガラスを回収する方法（特開昭４９−３１７
２２号公報）では前述のように大気を汚染するという問
題があり、またロール等で合わせガラスを粉砕してガラ
スを回収する装置を用いる方法（特開昭５７−２０９８
４７号公報）では大掛かりな装置が必要であるという問
題点がある。Therefore, various methods for recovering glass from laminated glass have been conventionally proposed. For example, a method for recovering glass by heating the laminated glass to a temperature below the softening point of the glass and burning the interlayer film ( JP-A-49-317
No. 22) has a problem of polluting the atmosphere as described above, and a method of using a device for recovering glass by crushing laminated glass with a roll or the like (JP-A-57-2098).
No. 47) has a problem that a large-scale device is required.
【０００６】そこで本発明は、上記の欠点を解決しよう
とするもので、その目的は、不要となった合わせガラス
を廃棄処分することなく簡易な方法でガラスを回収して
再生利用することができる方法を提供することにある。[0006] Therefore, the present invention is intended to solve the above-mentioned drawbacks, and an object thereof is to recover and recycle glass by a simple method without disposing of unnecessary laminated glass. To provide a method.
【０００７】[0007]
【課題を解決するための手段】本発明の合わせガラスか
らガラスを回収する方法は、一対のガラス板の間に中間
膜が配置されて形成される合わせガラスを、加熱炉でガ
ラス軟化温度以下に加熱してガラス板の間の中間膜を軟
化させる工程と、該中間膜を張架した加熱線に押し当
て、前記合わせガラスを左右に移動させながら前記中間
膜を溶融・切断する工程を包含し、そのことにより上記
課題を達成することができる。The method for recovering glass from laminated glass according to the present invention comprises heating a laminated glass having an intermediate film disposed between a pair of glass plates to a glass softening temperature or lower in a heating furnace. The step of softening the intermediate film between the glass plates and the step of pressing the intermediate film against a heating wire that stretches the intermediate film to melt and cut the intermediate film while moving the laminated glass from side to side. The above-mentioned subject can be achieved.
【０００８】次に、本発明を詳しく説明する。合わせガ
ラス１０は、図１に示すように、２枚のガラス板１、１
の間に中間膜２が配置されて形成されたものである。上
記ガラス板１は、通常は透明、半透明、不透明あるいは
着色された板ガラスである。Next, the present invention will be described in detail. As shown in FIG. 1, the laminated glass 10 includes two glass plates 1, 1
The intermediate film 2 is arranged between the two. The glass plate 1 is usually transparent, translucent, opaque or colored plate glass.
【０００９】２枚のガラス板１、１は同種のものであっ
てもよく、あるいは異種のものであってもよい。また、
ガラス板１の厚みやサイズは限定されず、一般に市販さ
れている程度でよく、具体的にはその厚みは１〜２０ｍ
ｍである。The two glass plates 1 and 1 may be of the same kind or of different kinds. Also,
The thickness and size of the glass plate 1 are not limited, and may be generally commercially available. Specifically, the thickness is 1 to 20 m.
m.
【００１０】中間膜２を形成する樹脂としては、通常は
熱可塑性樹脂であり、この種の合わせガラスに使用され
る従来より公知の樹脂、例えばポリビニルブチラール、
ポリウレタン、エチレン−酢酸ビニル共重合体等が挙げ
られ、特に可塑化ポリビニルブチラール及びポリウレタ
ンが好適である。また、中間膜２には、可塑剤、紫外線
吸収剤、酸化防止剤等が配合されていてもよい。The resin forming the intermediate film 2 is usually a thermoplastic resin, and a conventionally known resin used for this type of laminated glass, such as polyvinyl butyral,
Examples thereof include polyurethane and ethylene-vinyl acetate copolymer, and plasticized polyvinyl butyral and polyurethane are particularly preferable. Further, the intermediate film 2 may be blended with a plasticizer, an ultraviolet absorber, an antioxidant and the like.
【００１１】本発明では、市場で不要となった上記構成
の合わせガラス１０を、例えば１５０〜２００℃に加熱
する。加熱手段としては、熱貫流式オーブン、一般的な
ギヤーオーブン等が好適に用いられる。一般にガラスの
軟化温度は６００℃前後であり、ガラス軟化温度以下に
加熱する。In the present invention, the laminated glass 10 having the above structure, which is no longer required in the market, is heated to, for example, 150 to 200 ° C. As the heating means, a heat flow-through oven, a general gear oven, etc. are preferably used. Generally, the softening temperature of glass is around 600 ° C., and the glass is heated below the softening temperature of glass.
【００１２】その後、合わせガラス１０のガラス板１、
１の間の中間膜２層に、図２に示すような張架された加
熱線２０に押し当て、合わせガラス１０を移動させて溶
融切断し、ガラス板１、１と中間膜２とを分離する。Then, the glass plate 1 of the laminated glass 10,
The intermediate film 2 layer between 1 is pressed against the heating wire 20 stretched as shown in FIG. 2, the laminated glass 10 is moved and melt cut, and the glass plates 1 and 1 and the intermediate film 2 are separated. To do.
【００１３】なお、ガラス板１を分離した後、ガラス板
１に付着している残留物は、温水（水でも可）を湿らせ
た布ですばやく拭き取るのが好ましいが、有機溶剤を用
いて拭き取ることもできる。After the glass plate 1 is separated, it is preferable that the residue attached to the glass plate 1 be quickly wiped off with a cloth moistened with warm water (water may be used), but it is wiped off with an organic solvent. You can also
【００１４】また、合わせガラス１０には、ガラス板１
の色によって種々の品種のものがあるので、不要となっ
た合わせガラス１０を加熱、溶融切断する前にそれらを
色別に選別することが好ましい。The laminated glass 10 has a glass plate 1
Since there are various types depending on the color, it is preferable to sort the laminated glass 10 by color before heating and melting and cutting the unnecessary laminated glass 10.
【００１５】本発明で使用する加熱線は、好ましくはニ
クロム線等の電気抵抗を有するものであり、その電気容
量は８０〜２００Ｗである。その加熱温度は、中間膜２
が溶融する温度、すなわち３００℃以上とし、特に５０
０℃以上であることが望ましい。３００℃未満の場合、
中間膜２層の切断に時間を要したりガラス板１が破損す
ることがあり、好ましくない。また、加熱線の径は、
０．３〜０．７ｍｍのものを使用する。これは、径が
０．３ｍｍ以下のものは切れ易いし、０．７ｍｍ以上の
ものはガラス板１、１の間に入らないためである。The heating wire used in the present invention preferably has an electric resistance such as a nichrome wire, and its electric capacity is 80 to 200 W. The heating temperature is the intermediate film 2
Melt temperature, that is, 300 ° C or higher, especially 50
It is preferably 0 ° C or higher. If the temperature is below 300 ° C,
It may take time to cut the two layers of the intermediate film or the glass plate 1 may be broken, which is not preferable. Also, the diameter of the heating wire is
The thing of 0.3-0.7 mm is used. This is because those having a diameter of 0.3 mm or less are easily cut, and those having a diameter of 0.7 mm or more do not enter between the glass plates 1 and 1.
【００１６】なお、びん等に被覆された合成樹脂被膜を
熱線を用いて剥離する方法が従来よりあるが（特公昭５
０−３８１４６号公報）、本発明は合わせガラスを対象
としている点で技術分野が異なり、しかも合わせガラス
をガラス転位温度以下で加熱して中間膜を軟化させてか
ら加熱線で中間膜を溶融・切断するので構成も異なるも
のである。There has been a conventional method of peeling a synthetic resin coating on a bottle or the like by using a heating wire (Japanese Patent Publication No.
0-38146 gazette), the present invention is different in the technical field in that it is intended for laminated glass, and furthermore, the laminated glass is heated at a glass transition temperature or lower to soften the intermediate film, and then the intermediate film is melted by a heating wire. The configuration is different because it is cut.
【００１７】[0017]
【作用】本発明では、合わせガラスをガラス軟化温度以
下に加熱することで中間膜のみを溶融直前まで軟化させ
る。この軟化した中間膜を加熱線に押し当て、合わせガ
ラスを左右に移動させることによって中間膜を溶融・切
断する。その際、合わせガラスを加熱炉にて加熱するこ
とにより、加熱線の温度低下を防ぐことができるので、
低容量で容易に中間膜を溶融・切断することができると
ともに、合わせガラスが予備加熱されるのでガラス板の
破損を防止することができる。従って、合わせガラスを
ガラスと中間膜とに短時間で容易に分離することができ
る。In the present invention, the laminated glass is heated to the glass softening temperature or lower to soften only the intermediate film until just before melting. The softened intermediate film is pressed against the heating wire and the laminated glass is moved left and right to melt and cut the intermediate film. At that time, by heating the laminated glass in a heating furnace, it is possible to prevent the temperature drop of the heating wire,
The interlayer film can be easily melted and cut with a low volume, and the laminated glass is preheated, so that the glass plate can be prevented from being damaged. Therefore, the laminated glass can be easily separated into the glass and the intermediate film in a short time.
【００１８】[0018]
【実施例】次に、本発明の実施例について説明する。EXAMPLES Next, examples of the present invention will be described.
【００１９】［実施例１］厚さ２．５ｍｍの２枚のフロ
ート板ガラス１、１の間に、厚さ０．７６ｍｍのポリビ
ニルブチラールからなる中間膜２を挟み、１５０ｍｍ×
２００ｍｍの透明な合わせガラス１０を作製した。この
合わせガラス１０を、炉内温度２００〜２１０℃のギヤ
ーオーブンに入れ、約１時間予備加熱をした。その後、
合わせガラス１０を取り出した。このときの合わせガラ
ス１０の表面温度は１８０〜２００℃となっていた。[Example 1] 150 mm × 150 mm × an interlayer film 2 made of polyvinyl butyral having a thickness of 0.76 mm was sandwiched between two float plate glasses 1 and 1 having a thickness of 2.5 mm.
A 200 mm transparent laminated glass 10 was produced. The laminated glass 10 was put in a gear oven having a furnace temperature of 200 to 210 ° C. and preheated for about 1 hour. afterwards,
The laminated glass 10 was taken out. The surface temperature of the laminated glass 10 at this time was 180 to 200 ° C.
【００２０】次に、図２に示すような張架された加熱線
（ニクロム線、径０．５ｍｍ、長さ３０ｃｍ、電気容量
１００Ｗ）２０に電源２１を接続して温度５００℃に
し、合わせガラス１０の中間膜２を加熱線２０に押し当
て、合わせガラス１０を左右に移動させながら溶融・切
断し、ガラス板１、１と中間膜２を分離させた。その
後、ガラス板１に付着している残留物を水に湿らした布
で拭き上げて残留物を除去し、分離された２枚のガラス
板１、１を得た。Next, a power source 21 is connected to a heating wire (nichrome wire, diameter 0.5 mm, length 30 cm, electric capacity 100 W) 20 stretched as shown in FIG. The intermediate film 2 of 10 was pressed against the heating wire 20, and the laminated glass 10 was melted and cut while moving left and right, and the glass plates 1 and 1 and the intermediate film 2 were separated. Then, the residue adhering to the glass plate 1 was wiped up with a cloth moistened with water to remove the residue, and two separated glass plates 1 and 1 were obtained.
【００２１】このようにして分離回収したガラス板１、
１を使用して、厚さ０．７６ｍｍのポリビニルブチラー
ルからなる中間膜を挟んで加熱圧着をして合わせガラス
を作製した。The glass plate 1 thus separated and recovered,
1 was used, and an interlayer film made of polyvinyl butyral having a thickness of 0.76 mm was sandwiched and thermocompression bonded to produce a laminated glass.
【００２２】［比較例１］実施例１において、合わせガ
ラス１０をギヤーオーブン炉内温度１００〜１２０℃に
入れ、約１時間予備加熱したこと以外は実施例１と同様
の方法で２枚のガラス板１、１を分離し、実施例１と同
様の方法で合わせガラスを作製した。なお、この方法
は、実施例１と比較すると９倍の時間を要した。Comparative Example 1 Two glass sheets were prepared in the same manner as in Example 1 except that the laminated glass 10 was placed in a gear oven furnace at a temperature of 100 to 120 ° C. and preheated for about 1 hour. The plates 1 and 1 were separated, and a laminated glass was produced in the same manner as in Example 1. It should be noted that this method required nine times as long as that of Example 1.
【００２３】［比較例２］実施例１において、合わせガ
ラス１０を常温下（２０℃）として、予備加熱無しで分
離工程を行ったこと以外は実施例１と同様の方法で実施
したが、実施例１より５０倍の時間を要し、その上にガ
ラスの破損を生じた。従って、この方法は実用的でな
い。[Comparative Example 2] The same procedure as in Example 1 was carried out except that the separating step was carried out at room temperature (20 ° C.) in the laminated glass 10 without preheating. It took fifty times longer than in Example 1 above which glass breakage occurred. Therefore, this method is not practical.
【００２４】実施例１、比較例１及び比較例２の所要時
間を表１に示す。Table 1 shows the time required for Example 1, Comparative Example 1 and Comparative Example 2.
【００２５】表１より、予備加熱が高い程、加熱線によ
る溶融・切断が速いことが分る。From Table 1, it can be seen that the higher the preheating is, the faster the melting / cutting by the heating wire is.
【００２６】[0026]
【表１】 [Table 1]
【００２７】実施例１及び比較例１で得られた合わせガ
ラスの光学特性を、ＪＩＳ３２１２に準拠して測定し
た。その結果を表２に示す。The optical characteristics of the laminated glass obtained in Example 1 and Comparative Example 1 were measured according to JIS3212. The results are shown in Table 2.
【００２８】[0028]
【表２】 [Table 2]
【００２９】表２より、実施例１及び比較例１で得られ
た合わせガラスは、通常の合わせガラスと同一の可視光
線透過率を有し、且つ雲価も変らないことが分る。From Table 2, it can be seen that the laminated glass obtained in Example 1 and Comparative Example 1 has the same visible light transmittance as the ordinary laminated glass and the cloud value does not change.
【００３０】[0030]
【発明の効果】以上の説明で明らかなように、本発明に
よれば、不要となった合わせガラスより中間膜と２枚の
ガラス板を簡易な方法で分離させることができるので、
ガラス板を容易に再利用することができる。また、再生
利用としてガラス原料へリサイクルすることも可能であ
る。As is apparent from the above description, according to the present invention, the interlayer film and the two glass plates can be separated from the unnecessary laminated glass by a simple method.
The glass plate can be easily reused. Further, it can be recycled as a glass raw material for recycling.
【図面の簡単な説明】[Brief description of drawings]
【図１】合わせガラスの断面の一例を示す部分断面図で
ある。FIG. 1 is a partial cross-sectional view showing an example of a cross section of a laminated glass.
【図２】合わせガラスのガラス板と中間膜とを分離する
手段の一例を示す説明図である。FIG. 2 is an explanatory diagram showing an example of means for separating a glass plate of laminated glass and an intermediate film.
１ ガラス板 ２ 中間膜 １０ 合わせガラス ２０ 加熱線 ２１ 電源 1 glass plate 2 interlayer film 10 laminated glass 20 heating wire 21 power supply
Claims (1)
なる中間膜が配置されて形成される合わせガラスを加熱
炉でガラス軟化温度以下に加熱して前記中間膜を軟化さ
せる工程と、前記合わせガラスの前記中間膜を張架され
た加熱線に押し当て、前記合わせガラスを左右に移動さ
せながら前記中間膜を溶融・切断する工程を包含する、
合わせガラスからガラスを回収する方法。1. A step of heating laminated glass formed by disposing an intermediate film made of a thermoplastic resin between a pair of glass plates to a glass softening temperature or lower in a heating furnace to soften the intermediate film, and the laminated glass. Pressing the intermediate film against a heating wire stretched, melting and cutting the intermediate film while moving the laminated glass left and right,
A method of recovering glass from laminated glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13725893A JPH06345499A (en) | 1993-06-08 | 1993-06-08 | Method for recovering glass from laminated glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13725893A JPH06345499A (en) | 1993-06-08 | 1993-06-08 | Method for recovering glass from laminated glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06345499A true JPH06345499A (en) | 1994-12-20 |
Family
ID=15194467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13725893A Pending JPH06345499A (en) | 1993-06-08 | 1993-06-08 | Method for recovering glass from laminated glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06345499A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8152947B2 (en) * | 2007-07-17 | 2012-04-10 | Sony Chemical & Information Device Corporation | Method for producing display device |
| US8152945B2 (en) * | 2007-07-17 | 2012-04-10 | Sony Chemical & Information Device Corporation | Method for producing display device |
-
1993
- 1993-06-08 JP JP13725893A patent/JPH06345499A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8152947B2 (en) * | 2007-07-17 | 2012-04-10 | Sony Chemical & Information Device Corporation | Method for producing display device |
| US8152945B2 (en) * | 2007-07-17 | 2012-04-10 | Sony Chemical & Information Device Corporation | Method for producing display device |
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