JPS6366938B2 - - Google Patents
Info
- Publication number
- JPS6366938B2 JPS6366938B2 JP56170750A JP17075081A JPS6366938B2 JP S6366938 B2 JPS6366938 B2 JP S6366938B2 JP 56170750 A JP56170750 A JP 56170750A JP 17075081 A JP17075081 A JP 17075081A JP S6366938 B2 JPS6366938 B2 JP S6366938B2
- Authority
- JP
- Japan
- Prior art keywords
- glass fiber
- mortar
- fiber bundles
- binder
- thickness
- 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
Links
- 239000003365 glass fiber Substances 0.000 claims description 46
- 239000000463 material Substances 0.000 claims description 16
- 239000011230 binding agent Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000004513 sizing Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 230000009969 flowable effect Effects 0.000 claims 1
- 239000004570 mortar (masonry) Substances 0.000 description 30
- 238000000034 method Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【発明の詳細な説明】
本発明はモルタル石膏スラリー等の無機水硬性
スラリー或は顔料、充填剤等を含有する樹脂組成
物のような固体粒子を含有する流動性組成物用補
強体として好適な硝子繊維製マツトを提供するこ
とを目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention is suitable as a reinforcing body for fluid compositions containing solid particles, such as inorganic hydraulic slurries such as mortar gypsum slurry, or resin compositions containing pigments, fillers, etc. The purpose is to provide a mat made of glass fiber.
硝子繊維で補強されたモルタル組成物（GRC）
は、硝子繊維束切断物（チヨツプドストランド、
以下CSと略称）とモルタルとを混合し、所定形
状に成型硬化することによつて製造されるが、こ
の方法は次の如き難点を有する。 Glass fiber reinforced mortar composition (GRC)
is cut glass fiber bundle (chopped strand,
It is manufactured by mixing mortar and molding material (hereinafter abbreviated as CS) and hardening it into a predetermined shape, but this method has the following drawbacks.
(1) CSとモルタルを混合する際、硝子繊維が傷
つき、強度が低下し易い。(1) When mixing CS and mortar, the glass fibers are easily damaged and their strength decreases.
(2) CSとモルタを充分良く混合するためには水
分の多い流動性の良好なモルタルを使用する必
要があり、高強度の硬化製品をうることができ
難い。(2) In order to thoroughly mix CS and mortar, it is necessary to use mortar with high moisture content and good fluidity, making it difficult to obtain a cured product with high strength.
(3) CSとモルタルを充分良く混合するためには、
比較的短いCSを使用する必要があり、充分強
度の大きい硬化製品をうることをができ難い。(3) In order to mix CS and mortar sufficiently,
It is necessary to use a relatively short CS, and it is difficult to obtain a cured product with sufficient strength.
(4) 混合中にCSが開繊して、絡まり合い均一な
製品をうることが困難である。(4) During mixing, CS opens and becomes entangled, making it difficult to obtain a uniform product.
モルタルとCSを型面に同時に吹付ける方法も
試みられているが、層間剥離を生じ難い、巣のな
い均質な製品を得ることが困難である等の難点が
ある。 Attempts have been made to simultaneously spray mortar and CS onto the mold surface, but these methods have drawbacks such as difficulty in causing delamination and difficulty in obtaining a homogeneous product without voids.
予め所定形状を附与した硝子繊維補強体にモル
タルを注入する成型法も提案されており、理論的
には上述の難点を解消しうる理由であるが、この
方法を実際に試みると、次のような難点があり、
この方法（以下、注型法という）は実際的な方法
ということはできなかつた。 A molding method has also been proposed in which mortar is injected into a glass fiber reinforced body that has been given a predetermined shape, which could theoretically solve the above-mentioned problems, but when this method is actually tried, the following results are found: There are some difficulties,
This method (hereinafter referred to as the casting method) could not be called a practical method.
(1) モルタルの注入に際し、硝子繊維が動き易
く、硝子繊維が偏在し易い。(1) When pouring mortar, glass fibers tend to move easily and become unevenly distributed.
(2) モルタルが硝子繊維補強体中を均一に通過し
難く、通過の際にモルタルがその構成成分に分
離し易く、均一な製品をうることができない。(2) It is difficult for the mortar to pass uniformly through the glass fiber reinforcement, and the mortar easily separates into its constituent components during the passage, making it impossible to obtain a uniform product.
本発明は注型法に伴う上述の難点を解消する
為、種々検討を重ねた結果、1000m当りの重量が
20〜500grの長尺の硝子繊維束が彎曲した形状を
なして堆積しているマツト状物であり、且つ硝子
繊維束同志は結合剤で結合され、硝子繊維束に対
する結合剤と集束剤の合計量の割合は２〜50wt
％であり、又、マツト状物の嵩密度及び圧縮度は
夫々20〜200Kg/m3及び0.5mm以上である硝子繊維
マツト状物を使用することにより極めて好適な結
果の得られることを見出し、本発明として提案し
たものである。 In order to solve the above-mentioned difficulties associated with the casting method, the present invention was developed after various studies, and as a result, the weight per 1000m was reduced.
It is a pine-like material in which long glass fiber bundles of 20 to 500 gr are piled up in a curved shape, and the glass fiber bundles are bound together with a binder, and the total amount of binder and sizing agent for the glass fiber bundles is The amount ratio is 2~50wt
%, and the bulk density and degree of compaction of the pine-like material are 20 to 200 Kg/m 3 and 0.5 mm or more, respectively, and it has been found that very suitable results can be obtained by using a glass fiber mat-like material. This is proposed as the present invention.
本発明のマツト状物を使用することにより、次
のように、優れた製品をうることができる。 By using the mat-like material of the present invention, excellent products can be obtained as follows.
(1) GRCは長尺の硝子繊維束で補強されている
ので、高強度の製品が得られる。(1) Since GRC is reinforced with long glass fiber bundles, a high-strength product can be obtained.
(2) 硝子繊維束とモルタルを混練する必要がない
ので、硝子繊維束が傷つくこともない。(2) Since there is no need to knead the glass fiber bundle and mortar, the glass fiber bundle will not be damaged.
(3) 注型に際し、モルタルが構成成分に分離する
ことがない。(3) Mortar does not separate into its constituent components during casting.
(4) 肉厚の均一な製品をうることができ、工業的
大量生産が容易である。(4) Products with uniform wall thickness can be obtained, and industrial mass production is easy.
次に本発明を更に具体的に説明する。 Next, the present invention will be explained in more detail.
本発明においては1000m当りの重量が20〜
500grの長尺の硝子繊維束を使用する。硝子繊維
束はブツシングから引出した硝子繊維に集束剤を
附与して集束することによつて製造され、硝子繊
維束の1000m当りの重量は硝子繊維の太さ及び集
束本数によつて実質的に定まる。硝子繊維束の
1000m当りの重量（以下、太さという）を上述の
範囲とし、好適な結果をうるための硝子繊維束の
太さ及び集束本数は夫々10〜30μ及び30〜7000本
程度である。なお、集束剤としては酢酸ビニル重
合体等の被膜成形剤、アミン系界面活性剤等の潤
滑剤を固型分として合計３％程度含む液状のもの
が適当である。又、集束剤の附与量は固型分とし
て硝子繊維束重量の0.5〜２％程度とするのが適
当である。 In the present invention, the weight per 1000m is 20~
Use a long glass fiber bundle of 500gr. Glass fiber bundles are manufactured by adding a sizing agent to glass fibers drawn from a bushing and converging them.The weight per 1000m of glass fiber bundles depends on the thickness of the glass fibers and the number of bundles. Determined. glass fiber bundle
The weight per 1000m (hereinafter referred to as thickness) is within the above-mentioned range, and the thickness and number of bundles of glass fibers to obtain suitable results are approximately 10 to 30μ and 30 to 7000, respectively. The sizing agent is suitably a liquid material containing a total of about 3% solid content of a film forming agent such as a vinyl acetate polymer and a lubricant such as an amine surfactant. Further, it is appropriate that the amount of the sizing agent added is about 0.5 to 2% of the weight of the glass fiber bundle as a solid content.
硝子繊維束の太さは、目的とする成型物の大き
さに応じて定められ、一般的にこの大きさが大き
い程太い繊維束が使用されるが、この太さがあま
り大きいとGRC中の硝子繊維のミクロ的分布が
不均一となる。 The thickness of the glass fiber bundle is determined according to the size of the desired molded product, and generally speaking, the larger the size, the thicker the fiber bundle is used, but if the thickness is too large, it may be difficult to use during GRC. The microscopic distribution of glass fibers becomes non-uniform.
硝子繊維束の太さがあまり小さいとモルタル注
入時にモルタル成分の分離が起り易く、又、モル
タル注入抵抗が大となつて、作業性が低下し、モ
ルタルが注入口から遠い部分の端部に到達し難く
なる。 If the thickness of the glass fiber bundle is too small, separation of mortar components will easily occur during mortar injection, and mortar injection resistance will increase, reducing workability and causing mortar to reach the end of the part far from the injection port. It becomes difficult to do.
長尺の硝子繊維束を移動するコンベア上に落下
堆積せしめる。ここに長尺とは未切断の連続した
繊維束、若しくは60cm以上、望ましくは100cm以
上の切断物をいう。硝子繊維束は無方向に彎曲し
た形状をなしてコンベア上に堆積し互に絡み合い
マツト状物となる。なお、硝子繊維束の堆積量は
300〜1200gr/m2程度とするのが適当である。 A long glass fiber bundle is dropped and deposited on a moving conveyor. Here, long refers to uncut continuous fiber bundles or cut pieces of 60 cm or more, preferably 100 cm or more. The glass fiber bundles form a non-directionally curved shape and are deposited on the conveyor and intertwined with each other to form a mat-like material. The amount of accumulated glass fiber bundles is
Appropriately, it is about 300 to 1200gr/ m2 .
硝子繊維束にその重量の1.5〜48wt％の結合剤
を附与する。結合剤としては、ポリ酢酸ビニー
ル、アクリル酸又はメタアクリル酸エステルの重
合体、酢酸ビニール、エチレン共重合体の粉末が
好適に使用できる。このような結合剤を加熱して
結合剤を効硬化乃至軟化せしめて、硝子繊維束同
志を結合する。この際結合剤の量は集束剤との合
計量が硝子繊維束に対し２〜50wt％となるよう
に定める。加熱時或は加熱後マツト状物を要すれ
ば所定の厚みとなるよう挾圧することによりマツ
ト状物の嵩密度を20〜200Kg/m3ならしめる。 A binder is added to the glass fiber bundle in an amount of 1.5 to 48 wt% of its weight. As the binder, polyvinyl acetate, a polymer of acrylic acid or methacrylic acid ester, and a powder of vinyl acetate or ethylene copolymer can be suitably used. Such a binder is heated to harden or soften the binder, thereby bonding the glass fiber bundles together. At this time, the amount of the binder is determined so that the total amount including the binder is 2 to 50 wt% based on the glass fiber bundle. During heating or after heating, if necessary, the mat-like material is clamped and pressed to a predetermined thickness to adjust the bulk density of the mat-like material to 20 to 200 Kg/m 3 .
このようにして得られたマツト状物を構成する
長尺の硝子繊維束は彎曲した形状をなして絡み合
い、硝子繊維束同志は多数の点で他の硝子繊維束
と交差し、この交差点で上記結合剤により結合さ
れ格子状物を形成する。この結果、硝子繊維束は
マクロ的にはその動きを拘束されるが、ミクロ的
には変位可能である。従つて、このようなマツト
状物にモルタルを注入すると、硝子繊維束が全体
として移動せず、硝子繊維の分布に片寄りを生ず
ることはない。しかも、上述の条件下において格
子状物の大きさは適度の大きさを有し、又硝子繊
維束はミクロ的に変位可能なのでモルタル中の粗
粒成分も微粉成分と同様自由に格子状の硝子繊維
束の間を通り抜けることができるため、モルタル
を注入したときモルタル成分の分離が生ずること
はない。 The long glass fiber bundles constituting the pine-like object thus obtained are intertwined in a curved shape, and the glass fiber bundles intersect with other glass fiber bundles at many points, and at these intersections, They are bound together by a binder to form a lattice. As a result, the movement of the glass fiber bundle is restricted macroscopically, but it can be displaced microscopically. Therefore, when mortar is injected into such a mat-like material, the glass fiber bundles do not move as a whole, and the distribution of the glass fibers does not become uneven. Furthermore, under the above conditions, the size of the lattice is appropriate, and the glass fiber bundles are microscopically displaceable, so the coarse particles in the mortar can freely form the lattice like the fine particles. Since it can pass between the fiber bundles, no separation of mortar components occurs when mortar is poured.
マツト状物の以下定義する圧縮度は主として硝
子繊維の太さ、集束本数、集束剤の種類及び附与
量、結合剤の種類及び附与量によつて定まる。本
発明においてこれらを上述の限定要件を満足させ
る範囲内において実験的に定め、圧縮度を0.5mm
以上たらしめる。 The degree of compression of the mat-like material defined below is determined mainly by the thickness of the glass fibers, the number of bundled fibers, the type and amount of the sizing agent, and the type and amount of the binder. In the present invention, these are determined experimentally within a range that satisfies the above-mentioned limiting requirements, and the degree of compression is set to 0.5 mm.
That's all.
圧縮度を上述の範囲とすることにより、注入さ
れたモルタルの流動による硝子繊維束の変形、片
寄りを防止し、均一な製品の得られることが判明
した。 It has been found that by setting the degree of compression within the above range, deformation and shifting of the glass fiber bundles due to the flow of the injected mortar can be prevented, and a uniform product can be obtained.
ここに圧縮度とは、100gr/m2の割合で長尺硝子
繊維束を彎曲した形状をなして堆積したマツト状
物の厚みを、JIS C2202号の厚みの測定法に準じ
た方法により200grの荷重を用いて測定した場合
の厚みを意味する。 Here, the degree of compression is defined as the thickness of a pine-like material deposited in a curved shape of long glass fiber bundles at a rate of 100gr/m 2 to 200gr by a method according to the thickness measurement method of JIS C2202. It means the thickness when measured using a load.
なお、モルタル補強用に使用する場合、硝子繊
維は耐アルカリ性のものを使用するのが適当であ
る。 When used for reinforcing mortar, it is appropriate to use alkali-resistant glass fibers.
以下の実施例からも明らかなように、本発明の
マツト状物を使用した場合、モルタル成分の分離
を招来することなく、強度の大きい、均一な
GRCをうることができ、本発明は工業上有益な
ものであるが、本発明はその目的及び精神を逸脱
しない限度において適宜変更できるものである。
例えば、モルタルの代りに石膏スラリー等の無機
水硬性スラリー、充填剤、顔料を含む樹脂組成物
を使用することも可能である。 As is clear from the following examples, when the pine-like material of the present invention is used, it is possible to achieve a high-strength, uniform mortar without causing separation of mortar components.
GRC can be obtained and the present invention is industrially useful, but the present invention can be modified as appropriate without departing from its purpose and spirit.
For example, instead of mortar, it is also possible to use an inorganic hydraulic slurry such as gypsum slurry, a filler, and a resin composition containing a pigment.
次に本発明の実施例を示す。 Next, examples of the present invention will be shown.
実施例
太さ13μの耐アルカリ性硝子繊維200本に酢ビ
系集束剤を固形分として１％附与集束してなる
1000m当りの重量81grの連続したストランドを
530gr/m2の割合で移動するコンベア上に落下堆積
せしめた。これに結合剤として、エチレン、酢ビ
共重合体粉末を固型分として５重量％附与し、
200℃に２分間加熱して結合剤を硬化せしめ、厚
み６mm、嵩比重92.8Kg/m3、圧縮度１mmのマツト
状物を得た。このマツト状物を30cm×30cmの大き
さに切断したものを５枚重ねて箱体中に収容し、
上部に設けた３cmφのモルタル注入管からポルト
ランドセメント５重量部、砂（0.5mm以下）３重
量部、水３重量部よりなるモルタルを注入するこ
とにより、マツト状物にモルタルを含浸せしめ、
50℃で５時間養生し、４時間経過後、さらに積み
重ねた状態で１ケ月間２次養生し、GRCの物性
を測定し、次の結果を得た。Example: 200 alkali-resistant glass fibers with a thickness of 13μ are bundled with 1% vinyl acetate sizing agent as solid content.
Continuous strands weighing 81gr per 1000m
It was deposited on a conveyor moving at a rate of 530gr/m 2 . To this, 5% by weight of solids of ethylene and vinyl acetate copolymer powder was added as a binder,
The binder was cured by heating at 200° C. for 2 minutes to obtain a mat-like material having a thickness of 6 mm, a bulk specific gravity of 92.8 Kg/m 3 and a degree of compression of 1 mm. Five pieces of this pine-like material were cut into 30cm x 30cm pieces and placed in a box.
By injecting mortar consisting of 5 parts by weight of Portland cement, 3 parts by weight of sand (0.5 mm or less), and 3 parts by weight of water from the 3 cm diameter mortar injection pipe installed at the top, the pine-like material is impregnated with mortar.
They were cured at 50°C for 5 hours, and after 4 hours, they were further cured in a stacked state for 1 month.The physical properties of the GRC were measured, and the following results were obtained.
曲げ強度 373Kg/cm2 引張り強度 139Kg/cm2 アイゾツト衝撃強度 13Kg・cm／cm2 Bending strength 373Kg/cm 2 Tensile strength 139Kg/cm 2 Izotsu impact strength 13Kg・cm/cm 2
Claims (1)
繊維束が彎曲した形状をなして堆積しているマツ
ト状物であり、且つ硝子繊維束同志は結合剤で結
合され、硝子繊維束に対する結合剤と集束剤の合
計量の割合は２〜50wt％であり、又、マツト状
物の嵩密度及び圧縮度は夫々20〜200Kg/m3及び
0.5mm以上であることを特徴とする固体粒子を含
有する流動性組成物用補強体。1. It is a pine-like material in which long glass fiber bundles weighing 15 to 400g per 1000m are piled up in a curved shape, and the glass fiber bundles are bonded with a binder to form a bond to the glass fiber bundle. The total proportion of the agent and the sizing agent is 2~50wt%, and the bulk density and compaction degree of the pine-like material are 20~200Kg/m3 and 200~200Kg/ m3 , respectively.
A reinforcing body for a flowable composition containing solid particles having a size of 0.5 mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56170750A JPS5876564A (en) | 1981-10-27 | 1981-10-27 | Reinforcing body for flowable composition containing solid particle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56170750A JPS5876564A (en) | 1981-10-27 | 1981-10-27 | Reinforcing body for flowable composition containing solid particle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5876564A JPS5876564A (en) | 1983-05-09 |
| JPS6366938B2 true JPS6366938B2 (en) | 1988-12-22 |
Family
ID=15910688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56170750A Granted JPS5876564A (en) | 1981-10-27 | 1981-10-27 | Reinforcing body for flowable composition containing solid particle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5876564A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63249756A (en) * | 1987-04-01 | 1988-10-17 | 旭フアイバ−グラス株式会社 | Press molding mat |
| JPS63256758A (en) * | 1987-04-15 | 1988-10-24 | 旭フアイバ−グラス株式会社 | Glass fiber mat |
| US9186869B2 (en) | 2008-08-29 | 2015-11-17 | Certainteed Gypsum, Inc. | Composite floor underlayment with thermoplastic coatings |
| US8486516B2 (en) | 2008-08-29 | 2013-07-16 | Certainteed Gypsum, Inc. | Plastic coated composite building boards and method of making same |
| US9346244B2 (en) | 2008-08-29 | 2016-05-24 | Certainteed Gypsum, Inc. | Composite building boards with thermoplastic coatings and cementitious precoated fibrous mats |
| MX2020006532A (en) | 2017-12-19 | 2020-09-14 | Saint Gobain Adfors Canada Ltd | A reinforcing layer, a cementitious board, and method of forming the cementitious board. |
-
1981
- 1981-10-27 JP JP56170750A patent/JPS5876564A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5876564A (en) | 1983-05-09 |
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