JPH048389B2 - - Google Patents
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- Publication number
- JPH048389B2 JPH048389B2 JP59170820A JP17082084A JPH048389B2 JP H048389 B2 JPH048389 B2 JP H048389B2 JP 59170820 A JP59170820 A JP 59170820A JP 17082084 A JP17082084 A JP 17082084A JP H048389 B2 JPH048389 B2 JP H048389B2
- Authority
- JP
- Japan
- Prior art keywords
- glass fiber
- glass
- fiber waste
- raw material
- waste
- 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 - Lifetime
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Description
【発明の詳細な説明】
本発明は、硝子繊維屑を硝子繊維材料として利
用する方法に関する。
板硝子、瓶、ブラウン管等各種硝子製品を製造
する場合、発生した屑硝子をカレツトとして硝子
調合原料（バツチ）に混合し、硝子原料として利
用することは広く行なわれている。カレツトをバ
ツチに混合することによつてバツチの熔融性も向
上し燃料使用量も減少するので、この方法は工業
的に極めて好ましい方法である。
しかしながら、硝子繊維業界においては硝子繊
維屑は硝子原料として殆ど利用されず、主として
投棄されていた。投棄には余分な費用がかかり且
つ貴重な資源が無駄になるにもかかわらず硝子繊
維屑の利用が殆ど行なわれなかつたのは、硝子繊
維屑の利用に次のような難点があつた為である。
(1) 硝子繊維屑は長く、互に絡み合つているの
で、そのままでは硝子熔融窯への投入が困難で
あること及び、原料として定量的に投入する為
には、硝子繊維屑を微粉砕する必要があるが、
硝子繊維屑の微粉砕は、板硝子等の屑に比較し
て極めて困難であること。
(2) 硝子繊維屑には硝子繊維を製造する際に用い
られた、通常、固形分として0.3〜2wt％程度の
硝子繊維集束用バインダーが付着している。バ
インダーは、通常、フイルムフオーマー（酢酸
ビニル，ポリエステル ウレタン，スターチ
等）、架橋剤（アクリルシラン，ビニルシラン，
アミノシラン等）、潤滑剤、その他必要に応じ
て帯電防止第を加えたような有機物からなる。
このようなバインダーの付着した硝子繊維屑を
硝子熔融窯に投入すると、バインダーが炭化し
て炭素が生成して熔融硝子中に混入し、硝子の
着色の原因となつたり、泡の発生の原因となる
等の難点が生ずる。
本発明者は、上述した第１の難点である硝子繊
維屑の微粉砕法について工業的に好適な方法を見
出し、さきに特願昭56−19035号及び特願昭56−
29810号として出願した。本発明は上述した第２
の難点を解決する為の研究に基づく新たなる提案
である。前述したように、バインダーの付着した
硝子繊維屑を加熱するとバインダーが炭化し易
い。硝子繊維屑の加熱を制御された条件下に行な
うことにより炭化を防止することも提案されてい
るが（特公昭56−49859参照）、この方法は工程が
煩雑であり、工業的に好適の方法とは云い難い。
硝子繊維屑を充分な酸素の存在化に長時間加熱
することにより、炭化物のない硝子繊維屑を得る
ことができるが、この方法は多量の燃料を消費す
る難点がある。
硝子繊維屑を水洗することによりバインダーを
除去することも試みられるが、この方法（水洗法
という）は次のような難点を有する。
(1) 多量の水を必要とし又この方法で発生した廃
水をそのまま排出すると公害を生ずる恐れがあ
り、排水処理設備が必要となる。
(2) ブツシングから引き出されたままの硝子繊維
屑に付着しているバインダーは水洗法によつて
比較的容易に除去できるが、乾燥工程を経た硝
子繊維に付着しているバインダーは水洗法で除
去することは事実上不可能である。
本発明者は前述した方法によつて微粉砕した硝
子繊維屑を、バインダーの炭化を招来することな
く、又煩雑な制御或は多量の燃料の消費を伴うこ
となく、硝子繊維材料を有効に利用する方法を完
成すべく幾多の実験を重ねた。その結果、本発明
者は従来の常識に反し、硝子繊維屑の微粉砕物を
微粉硝子調合原料中に混合して硝子熔融窯中に投
入するならば、通常の加熱方法によつて炭化を生
ずることなく、バインダーを燃焼除去できる予期
しない効果の得られることを見出し、本発明とし
て提案するものである。
本発明の方法は極めて簡単なものであるが、従
来の常識を破るものであり、硝子繊維屑を利用し
た硝子繊維材料の製造方法として大きな工業的価
値を有するものである。
次に本発明を更に具体的に説明する。
本発明の方法によるときは、バインダーの付着
した硝子繊維屑も好適に利用できる。本発明にお
いて硝子繊維屑としては、ブツシングから引き出
された硝子繊維にバインダーを附与集束して巻き
取る際発生する硝子繊維屑（以下採糸屑という）
及び一旦巻き取つた硝子繊維を乾燥し、引き揃
え、燃糸、合糸、切断、マツト化等の二次加工を
行なう際発生する硝子繊維屑（以下加工屑とい
う）等が使用できる。
更に詳述すると、採糸屑としては以下に述べる
三つの形態がある。
(1) 硝子繊維をコレツトに巻き取る際の巻き初め
の部分（この部分は正規の製品に比し繊維の径
が大きい。）
(2) 糸切れ等によつてコレツトへの巻き取りが中
断した際生ずる巻小品。
(3) 糸切れ時等においてプルレールで糸を低速で
引張る際生ずる屑（正規の製品に比し繊維の径
が極めて大きい。）
これらの三つの形態は互に繊維の太さ、集合形
態が大きく相異するが、バインダーは水洗により
除去され易い。
加工屑としては、口出し屑、残糸屑、マツト状
製品の耳屑、不良品、端尺品等があるが、いづれ
もバインダーは水洗によつて除去することはでき
ない。
上述した硝子繊維屑は、たとえば特願昭56−
19035号，同56−29810号に開示されたような方法
によつて好適に微粉砕しうる。このようにして微
粉砕された硝子繊維屑は、篩分けて異物を除去
し、５メツシユ以下、望ましくは20メツシユ以下
のものを使用するのが適当である。特願昭56−
19035号及び同56−29810号の方法においては、微
粉砕は湿つた状態で行なうのが望ましく、得られ
た微粉砕物は６〜12wt％程度の水分を含有して
いる、このような湿つた微粉砕物（以下湿潤微粉
砕物という。）を乾燥して水分を1wt％以下とし
た後撰別工程に送り、混入する可能性がある鉄
分、アルミ、ステンレス等の金属分を除去する。
鉄分は磁力により除去することができる。アル
ミ、ステンレス等の非磁性材料は磁力では除去す
ることができないが、微粉砕された硝子繊維が乾
燥されている場合には通常の金属検出装置を用い
れば好適に除去することができることが判明し
た。
このようにして乾燥した硝子繊維微粉砕物中に
混入した金属を精度よく除去できるが硝子繊維微
粉砕物が湿潤している場合は混入金属の検出精度
が大きく低下し良好な分離を行ない得ないことが
判明した。混入金属を分離した硝子繊維屑の微粉
砕物を硝子繊維用微粉調合原料と混合する。微粉
調合原料としては、珪砂、炭酸カルシウム、コレ
マナイト、アルミナ等の硝子原料を200メツシユ
以下に粉砕、混合したものが好適に使用できる。
原料組成は、硝子繊維用組成である限り、特に限
定されないが、例えば次のような組成が好適であ
る。
原 料 重量％
珪 砂 45.0〜49.0
炭酸カルシウム 25.0〜28.0
コレマナイト 11.0〜14.0
アルミナ 10.0〜12.0
蛍 石 1.0〜2.0
ソーダ灰 0.5〜0.8
微粉硝子繊維としては５メツシユ以下、望まし
くは20メツシユ以下の微粉が好適である。微粉硝
子繊維の組成も特に限定されるものではないが、
例えば、下記のような組成のものを用いうる。
SiO2 54.89 R2O 0.65
Al2O3 14.13 TiO2 0.14
CaO 22.77 Fe2O3 0.25
MgO 0.37 F2 0.70
B2O3 6.31
微粉調合原料は微粉硝子繊維に対し２倍以上、
好ましくは３倍以上混合する。両者の好適な混合
比は１：３〜１：10の範囲である。
本発明においては両者の混合物（以下本混合物
という。）を常法に従つて硝子熔融窯中に投入、
重油、ガス等によつて加熱する（通常1500〜1600
℃）。しかる時は特別な加熱条件を採用すること
なく、或は通常の過剰空気率（約５％）で、バイ
ンダーの炭化の生ずることのない驚くべき結果が
得られることが判明した。何故このような好適な
結果が得られるのかその理由は充分に詳らかでは
ないが、およそ次のように考えられる。バインダ
ーの付着した硝子繊維屑は充分細かく微粉砕さ
れ、多量の微粉硝子原料と混合されてれいる。そ
してこの混合物は嵩高であり、硝子繊維屑の周り
には充分な空気及び硝子繊維屑より熔融し難い調
合原料が存在し、しかも加熱によつて調合原料か
ら気体が発生する結果、硝子繊維屑同志が熔融し
て層状をなすことがなく、表面積が大きく保た
れ、その表面が空気と接触する効果があるためと
思われ、泡の混入を減少する効果も併せて得られ
る。
なお本混合物を加熱熔融すべき窯の種類に特に
限定はないが、バブラーを有する窯を用いるのが
望ましい。バブラーによる空気の噴出量は熔融硝
子トン当り0.2〜４m3程度望ましくは0.4〜２m3程
度とするのが適当である。
次に本発明の実施例を示す。
実施例 １
上記組成のほぼ２：１の重量割合の採糸屑、加
工屑を含む、バインダーが付着した硝子繊維屑を
微粉砕し、水分8wt％の微粉砕物を得た。
この微粉砕物を乾燥し、水分を0.08wt％とし
た。乾燥物中の金属を常法で除去し、篩分けて20
メツシユ以下とし、これを200メツシユ以下の微
粉調合硝子原料と混合した。この混合物（硝子繊
維屑と微粉硝子原料の重量割合１：３）を硝子熔
融窯中に投入し、1550℃で加熱熔融した、混合物
の熔融状態は良好で気体の混入増加することな
く、バインダー炭化による着色を生ずることもな
かつた。
以下に示す条件のほかは実施例１と同様にして
硝子繊維材料を製造した。結果は下記の通りであ
つた。
【表】DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of utilizing glass fiber waste as a glass fiber material. When manufacturing various glass products such as plate glass, bottles, and cathode ray tubes, it is widely practiced to mix the generated glass scraps as cullet into a glass preparation raw material (batch) and use it as a glass raw material. This method is industrially highly preferred since the meltability of the batch is improved and the amount of fuel used is reduced by mixing the cullet into the batch. However, in the glass fiber industry, glass fiber waste was hardly used as a raw material for glass, and was mainly discarded. The reason why glass fiber waste was rarely used, despite the extra cost and waste of valuable resources, is that the use of glass fiber waste had the following drawbacks: be. (1) Glass fiber waste is long and intertwined with each other, so it is difficult to feed it into a glass melting kiln as it is, and in order to quantitatively feed it as a raw material, glass fiber waste must be pulverized. Although it is necessary,
It is extremely difficult to pulverize glass fiber scraps compared to scraps such as sheet glass. (2) The glass fiber waste is usually coated with a binder for binding glass fibers, which is used in the production of glass fibers and has a solid content of about 0.3 to 2 wt%. The binder is usually a film former (vinyl acetate, polyester urethane, starch, etc.), a crosslinking agent (acrylic silane, vinyl silane,
(aminosilane, etc.), lubricants, and other organic substances with antistatic agents added as necessary.
When such glass fiber waste with binder attached is put into a glass melting kiln, the binder will carbonize and carbon will be generated and mixed into the molten glass, which may cause coloring of the glass or the generation of bubbles. This may cause problems such as: The present inventor has discovered an industrially suitable method for pulverizing glass fiber waste, which is the first difficulty mentioned above, and has previously published Japanese Patent Application No. 56-19035 and Japanese Patent Application No. 56-1903.
The application was filed as No. 29810. The present invention is directed to the above-mentioned second
This is a new proposal based on research to solve the problems of. As mentioned above, when glass fiber waste to which a binder is attached is heated, the binder tends to be carbonized. It has also been proposed to prevent carbonization by heating glass fiber waste under controlled conditions (see Japanese Patent Publication No. 56-49859), but this method requires complicated steps and is not an industrially suitable method. It's hard to say. By heating the glass fiber waste for a long time in the presence of sufficient oxygen, it is possible to obtain glass fiber waste free of carbides, but this method has the drawback of consuming a large amount of fuel. Attempts have been made to remove the binder by washing the glass fiber waste with water, but this method (referred to as the water washing method) has the following drawbacks. (1) This method requires a large amount of water, and if the wastewater generated by this method is discharged as it is, it may cause pollution, so wastewater treatment equipment is required. (2) The binder attached to the glass fiber waste that has been pulled out from the bushing can be relatively easily removed by washing with water, but the binder attached to the glass fibers that have gone through the drying process can be removed by washing with water. It is virtually impossible to do so. The present inventor has devised a method for effectively utilizing glass fiber waste finely pulverized by the method described above as a glass fiber material without causing carbonization of the binder, without complicated control, or without consuming a large amount of fuel. Many experiments were conducted to perfect the method. As a result, the inventor of the present invention found that, contrary to conventional wisdom, if finely ground glass fiber waste is mixed into a raw material for finely powdered glass preparation and put into a glass melting furnace, carbonization will occur by a normal heating method. The present inventors have discovered that an unexpected effect can be obtained in which the binder can be burnt and removed without causing any problems, and this is proposed as the present invention. Although the method of the present invention is extremely simple, it breaks conventional wisdom and has great industrial value as a method for producing glass fiber materials using glass fiber waste. Next, the present invention will be explained in more detail. When using the method of the present invention, glass fiber waste to which a binder is attached can also be suitably used. In the present invention, glass fiber waste is glass fiber waste generated when a binder is applied to glass fibers pulled out from a bushing, the fibers are bundled, and the glass fibers are wound up (hereinafter referred to as fiber waste).
Also, glass fiber waste (hereinafter referred to as processing waste) generated when glass fibers that have been wound once are dried and subjected to secondary processing such as drawing, burning, doubling, cutting, matting, etc. can be used. To explain in more detail, there are three forms of thread waste as described below. (1) The part at the beginning of winding when glass fiber is wound onto the collet (in this part, the diameter of the fiber is larger than that of the regular product) (2) Winding onto the collet is interrupted due to thread breakage, etc. A unique small piece of zurumaki. (3) Debris generated when thread is pulled at low speed with a pull rail when thread breaks (fiber diameter is extremely large compared to regular products) These three forms have large fiber thickness and aggregate form. Although different, the binder is easily removed by washing with water. Processing waste includes lead-out waste, residual thread waste, edge waste of pine-like products, defective products, end-size products, etc., but the binder cannot be removed by washing with water. The above-mentioned glass fiber waste is, for example,
It can be suitably pulverized by the method disclosed in No. 19035 and No. 56-29810. The thus finely pulverized glass fiber waste is sieved to remove foreign matter, and it is appropriate to use 5 meshes or less, preferably 20 meshes or less. Special application 1986-
In the methods of No. 19035 and No. 56-29810, it is preferable to carry out the pulverization in a wet state, and the resulting pulverized material contains about 6 to 12 wt% of water. The finely pulverized material (hereinafter referred to as the wet pulverized material) is dried to reduce the moisture content to 1wt% or less, and then sent to a sorting process to remove metals such as iron, aluminum, and stainless steel that may be mixed in.
Iron can be removed by magnetic force. Although non-magnetic materials such as aluminum and stainless steel cannot be removed by magnetic force, it has been found that finely pulverized glass fibers that have been dried can be effectively removed using a normal metal detection device. . In this way, metals mixed in the dried glass fiber finely ground material can be removed with high precision, but if the glass fiber finely ground material is wet, the detection accuracy of the mixed metals will be greatly reduced and good separation will not be possible. It has been found. The finely pulverized glass fiber waste from which mixed metals have been separated is mixed with the fine powder preparation raw material for glass fibers. As the raw material for fine powder preparation, a mixture of glass raw materials such as silica sand, calcium carbonate, colemanite, and alumina pulverized to 200 mesh or less can be suitably used.
The raw material composition is not particularly limited as long as it is a composition for glass fibers, but for example, the following composition is suitable. Raw material weight% Silica sand 45.0-49.0 Calcium carbonate 25.0-28.0 Colemanite 11.0-14.0 Alumina 10.0-12.0 Fluorite 1.0-2.0 Soda ash 0.5-0.8 As fine glass fiber, fine powder of 5 meshes or less, preferably 20 meshes or less is suitable. It is. Although the composition of the fine glass fiber is not particularly limited,
For example, one having the following composition can be used. SiO 2 54.89 R 2 O 0.65 Al 2 O 3 14.13 TiO 2 0.14 CaO 22.77 Fe 2 O 3 0.25 MgO 0.37 F 2 0.70 B 2 O 3 6.31 The raw material for fine powder preparation is more than twice that of fine glass fiber.
Preferably, it is mixed 3 times or more. A suitable mixing ratio of both is in the range of 1:3 to 1:10. In the present invention, a mixture of both (hereinafter referred to as this mixture) is put into a glass melting furnace according to a conventional method,
Heated with heavy oil, gas, etc. (usually 1500 to 1600
℃). It has been found that in such cases, surprising results without carbonization of the binder can be obtained without special heating conditions or with a normal excess air content (approximately 5%). The reason why such a favorable result is obtained is not fully understood, but it is thought to be approximately as follows. The glass fiber waste to which the binder is attached is pulverized sufficiently finely and mixed with a large amount of finely powdered glass raw material. This mixture is bulky, and there is sufficient air around the glass fiber waste and mixed raw materials that are more difficult to melt than the glass fiber waste, and gas is generated from the mixed raw materials by heating, so that the glass fiber waste This is thought to be because the surface area is kept large without melting to form a layer, which has the effect of bringing the surface into contact with air, and also has the effect of reducing the inclusion of bubbles. There is no particular limitation on the type of kiln in which this mixture is to be heated and melted, but it is desirable to use a kiln equipped with a bubbler. The amount of air ejected by the bubbler is preferably about 0.2 to 4 m 3 per ton of molten glass, preferably about 0.4 to 2 m 3 . Next, examples of the present invention will be shown. Example 1 Glass fiber scraps to which a binder was attached, including yarn scraps and processed scraps in a weight ratio of approximately 2:1 in the above composition, were pulverized to obtain a pulverized product with a water content of 8 wt%. This finely pulverized product was dried to have a moisture content of 0.08 wt%. Metals in the dried material are removed using a conventional method, and sieved to 20%
This was mixed with a finely powdered glass raw material of 200 mesh or less. This mixture (weight ratio of glass fiber waste and fine glass raw material 1:3) was put into a glass melting furnace and heated and melted at 1550℃. No coloring occurred. A glass fiber material was produced in the same manner as in Example 1 except for the conditions shown below. The results were as follows. 【table】
Claims (1)
維屑の微粉砕物を硝子繊維用微粉調合原料と混合
し、硝子原料熔融窯中に投入熔融することを特徴
とする硝子繊維屑を利用した硝子繊維材料の製造
方法。 ２ 硝子繊維屑の微粉砕物１重量部に対し硝子繊
維用微粉調合原料２重量部以上を混合することを
特徴とする、特許請求の範囲第１項記載の方法。 ３ 硝子繊維屑の微粉砕物の粒径が５メツシユ以
下であり、硝子繊維用微粉調合原料80％以上の粒
径が、200メツシユ以下であることを特徴とする
特許請求の範囲第１項記載の方法。 ４ バブラーを用いて熔融硝子のトン当り0.2〜
４m3の空気を導入する特許請求の範囲第１項記載
の方法。[Scope of Claims] 1. Glass fiber waste characterized in that a finely pulverized glass fiber waste to which a binder for binding glass fibers is attached is mixed with a fine powder preparation raw material for glass fibers, and the mixture is put into a glass raw material melting furnace and melted. A method for manufacturing glass fiber material using. 2. The method according to claim 1, characterized in that 2 parts by weight or more of a fine powder preparation raw material for glass fibers is mixed with 1 part by weight of the finely ground glass fiber waste. 3. The particle size of the finely ground glass fiber waste is 5 mesh or less, and the particle size of 80% or more of the fine powder blended raw material for glass fiber is 200 mesh or less. the method of. 4 0.2~ per ton of molten glass using a bubbler
A method according to claim 1, in which 4 m 3 of air is introduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17082084A JPS6148438A (en) | 1984-08-16 | 1984-08-16 | Method for manufacturing glass fiber material using glass fiber waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17082084A JPS6148438A (en) | 1984-08-16 | 1984-08-16 | Method for manufacturing glass fiber material using glass fiber waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6148438A JPS6148438A (en) | 1986-03-10 |
| JPH048389B2 true JPH048389B2 (en) | 1992-02-14 |
Family
ID=15911934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17082084A Granted JPS6148438A (en) | 1984-08-16 | 1984-08-16 | Method for manufacturing glass fiber material using glass fiber waste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6148438A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ297579B6 (en) | 1998-01-09 | 2007-02-07 | Saint-Gobain Vitrage | Process for melting and refining vitrifiable materials and apparatus for making the same |
| FR2774085B3 (en) | 1998-01-26 | 2000-02-25 | Saint Gobain Vitrage | PROCESS FOR MELTING AND REFINING VITRIFIABLE MATERIALS |
| JP2003212596A (en) * | 2002-01-23 | 2003-07-30 | Paramount Glass Kogyo Kk | Glass composition for producing inorganic fiber, production method therefor and inorganic fiber molding thereof |
| JP2016117628A (en) * | 2014-12-24 | 2016-06-30 | 日本電気硝子株式会社 | Production method of glass fiber |
| JP2016117627A (en) * | 2014-12-24 | 2016-06-30 | 日本電気硝子株式会社 | Production method of glass fiber |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1489797A (en) * | 1975-05-15 | 1977-10-26 | Fibreglass Ltd | Production of glass fibres |
| JPS5743530A (en) * | 1981-06-16 | 1982-03-11 | Toshiba Corp | Variable speed ac motor |
| JPS5888137A (en) * | 1981-11-19 | 1983-05-26 | Nitto Boseki Co Ltd | Preparation of glass powder |
-
1984
- 1984-08-16 JP JP17082084A patent/JPS6148438A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6148438A (en) | 1986-03-10 |
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