JPH039050B2 - - Google Patents
Info
- Publication number
- JPH039050B2 JPH039050B2 JP59146622A JP14662284A JPH039050B2 JP H039050 B2 JPH039050 B2 JP H039050B2 JP 59146622 A JP59146622 A JP 59146622A JP 14662284 A JP14662284 A JP 14662284A JP H039050 B2 JPH039050 B2 JP H039050B2
- Authority
- JP
- Japan
- Prior art keywords
- crucible
- nozzle
- diameter
- glass
- opening angle
- 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
Links
- 239000003365 glass fiber Substances 0.000 claims description 26
- 239000006060 molten glass Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000011521 glass Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 10
- 239000006063 cullet Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 239000012510 hollow fiber Substances 0.000 description 5
- 238000009987 spinning Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910001260 Pt alloy Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000000635 electron micrograph Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/022—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres, undulated fibres, fibres presenting a rough surface
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、中空ガラス繊維の製造方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing hollow glass fibers.
従来の技術及び問題点
ガラス繊維は、高強度を有し、安価であるため
有用であるが、比重が大きいためその軽量化が要
望されている。このため中空ガラス繊維が注目さ
れ、複合材料の原料、断熱材料、機能性素材等と
して実用化が期待されている。BACKGROUND TECHNOLOGY AND PROBLEMS Glass fibers are useful because they have high strength and are inexpensive, but because of their high specific gravity, there is a desire to reduce their weight. For this reason, hollow glass fibers are attracting attention and are expected to be put to practical use as raw materials for composite materials, insulation materials, functional materials, etc.
中空ガラス繊維の製造方法としては、現在次の
ような方法が知られている。 The following methods are currently known as methods for producing hollow glass fibers.
(1) 底部に穴を有する大小二種類のルツボを間隔
をあけて重ね合わせ、その間に入れた溶融ガラ
スを底部の穴から紡糸する方法（特開昭56−
134532号公報）。(1) A method in which two types of crucibles, large and small, each having a hole in the bottom are placed one on top of the other with a gap between them, and the molten glass placed between them is spun from the hole in the bottom (JP-A-56-
134532).
(2) 底部に穴を有するルツボに溶融ガラスを３〜
５mm厚に入れ、空気を巻き込ませながら底部の
穴から紡糸する方法。(2) Place molten glass in a crucible with a hole at the bottom for 3~
A method of spinning yarn from the hole at the bottom by inserting it into a 5mm thick yarn and drawing in air.
(3) 底部に紡糸ノズルを有するルツボに溶融ガラ
スを入れ、紡糸ノズルエ上方から空気を吹き付
け、ノズル中央部の溶融ガラスを排除しながら
紡糸する方法（米国特許第3510393号公報）。(3) A method in which molten glass is placed in a crucible having a spinning nozzle at the bottom, air is blown from above the spinning nozzle, and the molten glass in the center of the nozzle is removed while spinning (US Pat. No. 3,510,393).
しかしながら上記(1)の方法は、ルツボのノズル
とガラスとのいわゆるえ濡れ具合によつて中空繊
維の製造条件が微妙に変化し、安定した生産には
適さない、(2)の方法は、ノズルの濡れ具合や溶融
ガラスの液面の状態により中空繊維の状態が大き
く影響を受ける、(3)の方法は、装置の構造が極め
て複雑であるという欠点がある。 However, method (1) above is not suitable for stable production because the hollow fiber manufacturing conditions change slightly depending on the degree of wetting between the nozzle of the crucible and the glass, and method (2) is not suitable for stable production. Method (3), in which the state of the hollow fibers is greatly affected by the degree of wetting of the glass and the state of the liquid level of the molten glass, has the disadvantage that the structure of the device is extremely complicated.
問題点を解決するための手段
本発明者は、上記した点に鑑みて、種々研究を
重ねた結果、簡単な装置により、均質な中空ガラ
ス繊維を安定して連続生産し得る方法を見出し、
ここに本発明を完成した。Means for Solving the Problems In view of the above-mentioned points, the present inventor has conducted various studies and has discovered a method for stably and continuously producing homogeneous hollow glass fibers using a simple device.
The present invention has now been completed.
即ち、本発明は、ルツボの底部に開き角度70〜
120゜の円錐状で口径４〜10mmのノズルを設けた大
小二種類のルツボを底部の間隔ｌが１〜３mmにな
るように重ね合わせ、外ルツボのノズルの開き角
度θ1と内ルツボのノズルの開き角度θ2とがθ1≧θ2
の関係にあり、外ルツボのノズルの口径φ1と内
ルツボのノズルの口径φ2とがφ1≦φ2の関係にあ
る二重ルツボを使用し、両ルツボの間に入れた溶
融ガラスをノズルの先端から紡糸することを特徴
とする中空ガラス繊維の製造方法に係る。 That is, the present invention has an opening angle of 70 to 70 at the bottom of the crucible.
Two types of crucibles, large and small, each equipped with a 120° conical nozzle with a diameter of 4 to 10 mm are placed one on top of the other so that the distance between the bottoms is 1 to 3 mm, and the opening angle of the nozzle of the outer crucible is θ 1 and the nozzle of the inner crucible is The opening angle θ 2 and θ 1 ≧ θ 2
The molten glass placed between the two crucibles is The present invention relates to a method for producing hollow glass fiber, which is characterized by spinning from the tip of a nozzle.
本発明は、従来問題の多かつたノズルの形状を
改善することにより、中空ガラス繊維の安定な連
続生産を可能にするものである。 The present invention enables stable continuous production of hollow glass fibers by improving the shape of the nozzle, which has conventionally caused many problems.
本発明で使用する二重ルツボの一例の縦断面図
を第１図に、ノズル部分の拡大図を第２図に示
す。ここで外ルツボ１の底面の円錐状ノズル３の
開き角度θ1と内ルツボ２の底面の円錐状ノズル４
の開き角度θ2は、70〜120゜の範囲内にあり且つθ1
≧θ2の関係にある。また外ルツボ１のノズル３の
口径φ1と内ルツボ２のノズル４の口径φ2は４〜
10mmの範囲内にあり、φ1≦φ2の関係にある。内
ルツボ２と外ルツボ１との底面の間隔ｌは、１〜
３mmとする。間隔が１mmより狭いと溶融ガラス５
の供給が不充分で糸が切れやすくなり、３mmより
広いと溶融ガラス５の供給が多すぎてノズル部分
にガラスが溜まり糸が中空になりにくい。 FIG. 1 shows a vertical cross-sectional view of an example of the double crucible used in the present invention, and FIG. 2 shows an enlarged view of the nozzle portion. Here, the opening angle θ 1 of the conical nozzle 3 on the bottom of the outer crucible 1 and the conical nozzle 4 on the bottom of the inner crucible 2
The opening angle θ 2 is within the range of 70 to 120°, and θ 1
There is a relationship of ≧θ 2 . Also, the diameter φ 1 of the nozzle 3 of the outer crucible 1 and the diameter φ 2 of the nozzle 4 of the inner crucible 2 are 4 to 4.
It is within the range of 10 mm and has the relationship of φ 1 ≦φ 2 . The distance l between the bottoms of the inner crucible 2 and the outer crucible 1 is 1 to
It is set to 3mm. If the gap is narrower than 1mm, it will be molten glass5
If the supply is insufficient, the thread will easily break, and if the width is wider than 3 mm, too much molten glass 5 will be supplied, and the glass will accumulate in the nozzle area, making it difficult for the thread to become hollow.
本発明では、上記した形状のノズルを有する二
重ルツボを使用することにより、ノズルの濡れ具
合に起因する問題点を解決し、中空ガラス繊維の
安定な連続生産を可能とすることができる。 In the present invention, by using a double crucible having a nozzle having the above-described shape, problems caused by the wetness of the nozzle can be solved and stable continuous production of hollow glass fibers can be made possible.
また本発明に使用する二重ルツボは、上部平面
部等に適当にガラスカレツト投入口（図示せず）
を開けることにより、原料として使用するガラス
カレツトを両ルツボ間の間隙に投入することがで
きる。 In addition, the double crucible used in the present invention has a glass cullet inlet (not shown) in the upper flat part, etc.
By opening the crucible, a glass cullet to be used as a raw material can be introduced into the gap between both crucibles.
ルツボの材料としては、白金合金、セラミツク
ス等が使用できる。白金合金は、耐熱性及び耐食
性に優れているために望ましいが高価である。セ
ラミツクスは、割れやすいという欠点があるが、
安価であり、かつ耐熱性に富み、実用上ほとんど
問題はない。 As the material for the crucible, platinum alloy, ceramics, etc. can be used. Platinum alloys are desirable because of their excellent heat resistance and corrosion resistance, but are expensive. Ceramics have the disadvantage of being easily broken, but
It is inexpensive, has high heat resistance, and poses virtually no problems in practical use.
本発明では、まず上記した二重ルツボを1000〜
1250℃に保持された加熱炉の中に置き、ガラスカ
レツト投入口からガラスカレツトを両ルツボ間に
入れる。次にガラスカレツトが溶融してノズルの
先端から流出したら、これを70〜1400ｍ／min程
度の速度でドラム等に巻き取ることにより、内ル
ツボから空気を導きながら連続的に中空ガラス繊
維を得ることができる。 In the present invention, first, the above-mentioned double crucible is
Place it in a heating furnace maintained at 1250°C, and insert a glass cullet between both crucibles from the glass cullet inlet. Next, once the glass cullet has melted and flowed out from the tip of the nozzle, by winding it up on a drum or the like at a speed of about 70 to 1400 m/min, it is possible to continuously obtain hollow glass fibers while guiding air from the inner crucible. can.
本発明では、溶融ガラスの原料として、あらか
じめ泡を含まないように調製されたガラスカレツ
トまたはマーブル等が使用できる。 In the present invention, glass cullet or marble, which has been prepared in advance so as not to contain bubbles, can be used as a raw material for the molten glass.
本発明によつて得られる中空ガラス繊維は、通
常外径10〜100μｍ、内径３〜30μｍ程度の長繊維
である。繊維の太さは、ノズルの形状、ノズルの
口径、ルツボの温度及びガラス繊維の巻き取り速
度等の種々の要因によつて調整可能である。 The hollow glass fibers obtained by the present invention are usually long fibers with an outer diameter of about 10 to 100 μm and an inner diameter of about 3 to 30 μm. The thickness of the fiber can be adjusted by various factors such as the shape of the nozzle, the diameter of the nozzle, the temperature of the crucible, and the winding speed of the glass fiber.
発明の効果
本発明方法によれば、外径10〜100μｍ、内径
３〜30μｍ程度の品質の一定した中空ガラス繊維
の安定な連続製造が可能となる。Effects of the Invention According to the method of the present invention, it is possible to stably and continuously produce hollow glass fibers of constant quality with an outer diameter of about 10 to 100 μm and an inner diameter of about 3 to 30 μm.
実施例
次に実施例を示して本発明を更に詳しく説明す
る。Examples Next, the present invention will be explained in more detail with reference to Examples.
実施例 １
木節粘土、ロウ石及びシヤモツトからなる泥し
ようを石膏型に鋳込み、肉厚約３mmの二重ルツボ
を得た。内ルツボの円錐状ノズルの開き角度と外
ルツボの円錐状ノズルの開き角度はともに120゜と
し、外ルツボのノズルの口径７mm、内ルツボのノ
ズルの口径８mm、内ルツボと外ルツボの底面の間
隔は１mmとした。Example 1 Mud made of Kibushi clay, waxite, and siyamoto was cast into a plaster mold to obtain a double crucible with a wall thickness of about 3 mm. The opening angle of the conical nozzle of the inner crucible and the opening angle of the conical nozzle of the outer crucible are both 120°, the diameter of the nozzle of the outer crucible is 7 mm, the diameter of the nozzle of the inner crucible is 8 mm, and the distance between the bottoms of the inner crucible and outer crucible is was set to 1 mm.
この二重ルツボを炭化ケイ素発熱体電気炉に入
れ、1300℃に加熱して数時間保持した後温度を下
げ1200℃に保つた。 This double crucible was placed in an electric furnace with a silicon carbide heating element, heated to 1300°C, held for several hours, and then lowered and maintained at 1200°C.
次に、SiO250％、CaO18％、B2O817％、
Al2O39.41％及びNa2O5.57％からなるガラスカレ
ツトをガラスカレツト投入口より二重ルツボの間
に入れた。カレツトが溶解して外ルツボのノズル
からガラスが流出したら、電気炉の温度を1150℃
にし、ガラスを400rpmで回転する直径450mmの
Al製のドラムに巻き取つた。このようにして得
られた中空ガラス繊維の電子顕微鏡写真（215倍）
を第２図に示す。これより得られたガラス繊維
は、外径29μｍ、内径13μｍ程度でありマカロニ
状の構造を有することが明らかである。このガラ
ス繊維は、引つ張り強度54.8Kg／mm2、見掛け比重
1.98（真比重2.48）であつた。 Next, SiO2 50%, CaO18%, B2O8 17 %,
A glass cullet containing 9.41% Al 2 O 3 and 5.57% Na 2 O was placed between the double crucible through the glass cullet inlet. Once the cullet has melted and the glass has flowed out of the nozzle of the outer crucible, increase the temperature of the electric furnace to 1150℃.
and rotate the glass at 400rpm with a diameter of 450mm.
It was wound onto an aluminum drum. Electron micrograph of the hollow glass fiber obtained in this way (215x magnification)
is shown in Figure 2. The glass fiber thus obtained had an outer diameter of about 29 μm and an inner diameter of about 13 μm, and clearly had a macaroni-like structure. This glass fiber has a tensile strength of 54.8Kg/mm 2 and an apparent specific gravity.
It was 1.98 (true specific gravity 2.48).
実施例 ２
内ルツボのノズルの開き角度90゜、口径８mmと
し、外ルツボのノズルの開き角度120゜、口径８mm
としたこと以外は、実施例１と同様の二重ルツボ
を用い、実施例１と同様の条件で中空ガラス繊維
を作製した。その結果外径30μｍ程度、内径10μ
ｍ程度の均質な中空ガラス繊維を連続して得るこ
とができた。Example 2 The nozzle opening angle of the inner crucible was 90° and the diameter was 8 mm, and the nozzle of the outer crucible had an opening angle of 120° and the diameter was 8 mm.
A hollow glass fiber was produced using the same double crucible as in Example 1 and under the same conditions as in Example 1, except for the following. As a result, the outer diameter is about 30μm, and the inner diameter is 10μm.
It was possible to continuously obtain homogeneous hollow glass fibers of about m length.
比較例 １
内ルツボのノズル口径φ2を４mm、外ルツボの
ノズル口径φ1を８mm、即ち、φ1＞φ2とすること
以外は、実施例１と同じ条件で中空ガラス繊維の
製造を行なつたところ、内ルツボからの空気の導
入が制限されて、中空繊維を得ることができなか
つた。Comparative Example 1 Hollow glass fibers were produced under the same conditions as in Example 1, except that the nozzle diameter φ 2 of the inner crucible was 4 mm, and the nozzle diameter φ 1 of the outer crucible was 8 mm , that is, φ 1 > φ 2 . However, the introduction of air from the inner crucible was restricted, making it impossible to obtain hollow fibers.
比較例 ２
外ルツボのノズルの開き角度θ1を140゜とし、他
の条件は、実施例１と同一として、中空ガラス繊
維の製造を行なつた。その結果、中空孔の中心が
ガラス繊維の中心からずれ易くなり、また、繊維
の断面形状がいびつになつて糸切れが発生し易く
なつて、中空ガラス繊維を安定して連続製造する
ことができなかつた。Comparative Example 2 A hollow glass fiber was produced under the same conditions as in Example 1 except that the opening angle θ 1 of the nozzle of the outer crucible was 140°. As a result, the center of the hollow hole tends to shift from the center of the glass fiber, and the cross-sectional shape of the fiber becomes distorted, making it easier to break the fibers, making it difficult to stably and continuously manufacture hollow glass fiber. Nakatsuta.
比較例 ３
外ルツボのノズルの開き角度θ1を90゜、内ルツ
ボのノズルの開き角度θ2を120゜、即ちθ1＜θ2とす
ること以外は、実施例１と同じ条件で中空ガラス
繊維の製造を行なつた。その結果、空気の導入が
スムーズに行なわれなくなり、中空ガラス繊維を
得ることができなかつた。Comparative Example 3 Hollow glass was produced under the same conditions as Example 1, except that the opening angle θ 1 of the nozzle of the outer crucible was 90°, and the opening angle θ 2 of the nozzle of the inner crucible was 120°, that is, θ 1 < θ 2 . Manufactured textiles. As a result, air could not be introduced smoothly, making it impossible to obtain hollow glass fibers.
比較例 ４
内ルツボの外底と外ルツボの内底の間隔を0.8
mmとすること以外は、実施例１と同様にして中空
ガラス繊維の製造を行なつた。その結果、ガラス
の供給が不足するために中空糸の肉厚が薄くなり
過ぎて糸切れが頻繁に発生した。Comparative example 4 The distance between the outer bottom of the inner crucible and the inner bottom of the outer crucible is 0.8
Hollow glass fibers were produced in the same manner as in Example 1 except that the diameter was mm. As a result, the hollow fibers became too thin due to a lack of glass supply, resulting in frequent fiber breakage.
比較例 ５
内ルツボの外底と外ルツボの内底の間隔ｌを４
mmとすること以外は、実施例１と同様にして中空
ガラス繊維の製造を行なつた。その結果、ガラス
の供給量が多過ぎて中空糸の肉厚が厚くなり、中
空孔が極端に小さくなつた。Comparative example 5 The distance l between the outer bottom of the inner crucible and the inner bottom of the outer crucible is 4
Hollow glass fibers were produced in the same manner as in Example 1 except that the diameter was mm. As a result, the amount of glass supplied was too large, the thickness of the hollow fibers increased, and the hollow holes became extremely small.
第１図は、本発明に使用する二重ルツボの一例
の断面図である。第２図は、第１図に示す二重ル
ツボのノズル部分の拡大図である。第３図は、実
施例１で得た中空ガラス繊維の電子顕微鏡写真
（215倍）である。
尚図に於いて、１は外ルツボ、２は内ルツボ、
３は外ルツボのノズル、４は内ルツボのノズル、
５は溶融ガラスである。
FIG. 1 is a sectional view of an example of a double crucible used in the present invention. FIG. 2 is an enlarged view of the nozzle portion of the double crucible shown in FIG. 1. FIG. 3 is an electron micrograph (215x magnification) of the hollow glass fiber obtained in Example 1. In the figure, 1 is the outer crucible, 2 is the inner crucible,
3 is the nozzle of the outer crucible, 4 is the nozzle of the inner crucible,
5 is molten glass.
Claims (1)
で口径４〜10mmのノズルを設けた大小二種類のル
ツボを底部の間隔ｌが１〜３mmになるように重ね
合わせ、外ルツボのノズルの開き角度θ1と内ルツ
ボのノズルの開き角度θ2とがθ1≧θ2の関係にあ
り、外ルツボのノズルの口径φ1と内ルツボのノ
ズルの口径φ2とがφ1≦φ2の関係にある二重ルツ
ボを使用し、両ルツボの間に入れた溶融ガラスを
ノズルの先端から紡糸することを特徴とする中空
ガラス繊維の製造方法。1 Two types of crucibles, each with a conical nozzle with an opening angle of 70 to 120 degrees and a diameter of 4 to 10 mm, are stacked on top of each other so that the distance between the bottoms is 1 to 3 mm, and the nozzle of the outer crucible The opening angle θ 1 of the inner crucible and the opening angle θ 2 of the nozzle of the inner crucible are in the relationship of θ 1 ≧θ 2 , and the diameter of the nozzle of the outer crucible φ 1 and the diameter of the nozzle of the inner crucible φ 2 are φ 1 ≦φ. 2. A method for producing hollow glass fibers, characterized in that a double crucible having the relationship of 2 is used, and molten glass placed between both crucibles is spun from the tip of a nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14662284A JPS6126534A (en) | 1984-07-13 | 1984-07-13 | Production of hollow glass fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14662284A JPS6126534A (en) | 1984-07-13 | 1984-07-13 | Production of hollow glass fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6126534A JPS6126534A (en) | 1986-02-05 |
| JPH039050B2 true JPH039050B2 (en) | 1991-02-07 |
Family
ID=15411897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14662284A Granted JPS6126534A (en) | 1984-07-13 | 1984-07-13 | Production of hollow glass fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6126534A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4723939B2 (en) * | 2005-07-22 | 2011-07-13 | 株式会社ブリヂストン | Pneumatic tire |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56134532A (en) * | 1980-03-24 | 1981-10-21 | Agency Of Ind Science & Technol | Preparation of hollow glass fiber |
-
1984
- 1984-07-13 JP JP14662284A patent/JPS6126534A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56134532A (en) * | 1980-03-24 | 1981-10-21 | Agency Of Ind Science & Technol | Preparation of hollow glass fiber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4723939B2 (en) * | 2005-07-22 | 2011-07-13 | 株式会社ブリヂストン | Pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6126534A (en) | 1986-02-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |