JPS6359874B2 - - Google Patents
Info
- Publication number
- JPS6359874B2 JPS6359874B2 JP55065260A JP6526080A JPS6359874B2 JP S6359874 B2 JPS6359874 B2 JP S6359874B2 JP 55065260 A JP55065260 A JP 55065260A JP 6526080 A JP6526080 A JP 6526080A JP S6359874 B2 JPS6359874 B2 JP S6359874B2
- Authority
- JP
- Japan
- Prior art keywords
- mat
- fiber mat
- adhesive
- inorganic fiber
- cover
- 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
- 239000000463 material Substances 0.000 claims description 54
- 239000000853 adhesive Substances 0.000 claims description 21
- 230000001070 adhesive effect Effects 0.000 claims description 21
- 239000012784 inorganic fiber Substances 0.000 claims description 21
- 239000012790 adhesive layer Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 210000005069 ears Anatomy 0.000 claims description 3
- 102100040428 Chitobiosyldiphosphodolichol beta-mannosyltransferase Human genes 0.000 description 15
- 239000011491 glass wool Substances 0.000 description 14
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 8
- 235000011613 Pinus brutia Nutrition 0.000 description 8
- 241000018646 Pinus brutia Species 0.000 description 8
- 239000010426 asphalt Substances 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- 208000002193 Pain Diseases 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Manufacturing Of Multi-Layer Textile Fabrics (AREA)
- Laminated Bodies (AREA)
Description
【発明の詳細な説明】
本発明は、表被材で被覆した無機質繊維マツト
特にガラス繊維マツトの製造法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing inorganic fiber mat, particularly glass fiber mat, coated with a facing material.
ガラス繊維マツト等の無機質繊維マツトは、従
来から繊維特有の刺激性（チクチクする）がある
ため、マツトをプラスチツクフイルム、アルミフ
イルム、紙等の表被材及び下側シート状物で覆つ
た被覆繊維マツトが望まれ、各種製造されてい
る。 Inorganic fiber mats such as glass fiber mats have traditionally been irritating (stinging), which is characteristic of fibers. Pine is desired, and various types are manufactured.
従来の製造方法は、例えば第１図に示すように
ローラコンベヤで移送されるグラスウールマツト
１の上面に表被材２を移動させ、上面押圧ロール
及び側面押圧ロール等により表被材２をグラスウ
ールマツト１に押圧して、グラスウールマツト１
の上面、両側面及び下面を覆う。一方、グラスウ
ールマツト１の下面の全巾に亘つてアスフアルト
４が塗布された下側シート状物５が移動してお
り、この下側シート状物５をグラスウールマツト
１の下面中央及び表被材２の両端部３，３′の下
面に夫々接着して製造していた。 In the conventional manufacturing method, for example, as shown in FIG. 1, the outer covering material 2 is moved onto the top surface of a glass wool mat 1 that is transported by a roller conveyor, and the outer covering material 2 is moved onto the glass wool mat 1 using a top pressing roll, a side pressing roll, etc. Press 1 and press glass wool mat 1
Cover the top, both sides and bottom of the On the other hand, a lower sheet material 5 coated with asphalt 4 is moving over the entire width of the lower surface of the glass wool mat 1, and this lower sheet material 5 is placed between the center of the lower surface of the glass wool mat 1 and the surface material 2. They were manufactured by adhering them to the lower surfaces of both end portions 3 and 3', respectively.
前記マツトを被覆した表被材はマツトの上面を
接着しないで構成しているため、マツト上面の表
被材が風によつて円弧状にふくらみ、露出面が増
加し、その露出面から無機質繊維が飛散したり、
ふくらみにより表被材が剥れたり破れたりする欠
点があつた。更に製造の際、長手方向に移動する
ものを所定寸法に切断して製品化されるものであ
るから、表被材がふくらむと、切断の際に表被材
が切断されない場合や不正確な寸法で切断された
りすると同時に、表被材が切断装置に引掛かり破
損する恐れがあつた。 Since the surface material covering the pine is constructed without bonding the top surface of the pine, the surface material on the top surface of the pine swells in an arc shape due to the wind, increasing the exposed surface, and the inorganic fibers are exposed from the exposed surface. is scattered,
The problem was that the outer covering material could peel or tear due to swelling. Furthermore, during manufacturing, products that move in the longitudinal direction are cut into predetermined dimensions, so if the surface material swells, the surface material may not be cut during cutting or the dimensions may be inaccurate. At the same time, there was a risk that the cover material would get caught in the cutting device and be damaged.
又、壁面に取付けた後においても、空気がマツ
トと表被材との間を流れ、その空気がマツト内を
流れることになり、断熱性能を低下させる欠点が
あつた。 In addition, even after it is attached to a wall surface, air flows between the mat and the covering material, and this air flows inside the mat, resulting in a reduction in heat insulation performance.
前記の各欠点を排除するために、マツト上面の
全面に表被材を接着することが考えられる。マツ
トと表被材の接着を強固にするためには接着剤を
マツト内部にまで侵入せしめ投錨効果により接着
力を大とする必要がある。このため、マツト全面
に接着剤を塗布すると、内部の無機質繊維同志が
接着される結果、製品を圧縮梱包すると、開梱し
ても復元性が充分行なわれなくなる欠点があつ
た。 In order to eliminate each of the above-mentioned drawbacks, it is conceivable to adhere a covering material to the entire top surface of the pine. In order to strengthen the adhesion between the pine and the surface material, it is necessary to penetrate the adhesive into the interior of the pine and increase the adhesive strength through the anchoring effect. For this reason, when the adhesive is applied to the entire surface of the mat, the internal inorganic fibers are adhered to each other, resulting in the disadvantage that when the product is compressed and packed, it is not able to recover satisfactorily even after unpacking.
本発明はかかる難点を解決するため、種々検討
を重ねた結果、表被材を長手方向に連続した複数
個の線条部分で接着するならば、圧縮梱包した際
の復元性の低下もなく、しかも表被材のふくらみ
及びこれに起因する断熱性の低下、繊維の飛散防
止等についても全面接着の場合と実質的に同一の
効果をあげられることを見出した。 In order to solve such difficulties, the present invention has been made after various studies.If the outer covering material is bonded with a plurality of continuous linear parts in the longitudinal direction, there will be no loss of resilience when compressed and packed. Moreover, it has been found that substantially the same effects as in the case of full-surface adhesion can be achieved with respect to the swelling of the surface material, the resulting reduction in heat insulation, and the prevention of fiber scattering.
尚、接着線条の数は３〜５とするのが適当であ
り、この数が少いとふくらみを充分防止できず、
又、この数があまり大となると復元性が損われや
すい。接着線条はほゞ等間隔とするのが望まし
い。 In addition, it is appropriate that the number of adhesive stripes is 3 to 5; if this number is small, bulging cannot be sufficiently prevented,
Moreover, if this number becomes too large, restorability is likely to be impaired. It is desirable that the adhesive striations be approximately equally spaced.
本発明方法により得られた表被材を被覆した無
機質繊維マツトを、第４図ニに基いて、詳細に説
明すると、無機質繊維マツト１の上面及び両側面
と下面の中央部分を除いて表被材２で覆い、無機
質繊維マツト１の上面のみを両側端部を除いて長
手方向に複数個の接着層１８，……によつて接着
し、更に無機質繊維マツト１の下面両側部を覆つ
た表被材２の両端及び無機質繊維マツト１の下面
中央部分とに接着剤４を介して下側シート状物５
を接着する。尚、シート状物の両端耳部３８，３
８′はマツトよりも両側に突出するように形成し、
柱に固定できるようになつている。 The inorganic fiber mat coated with the surface material obtained by the method of the present invention will be described in detail with reference to FIG. material 2, and only the upper surface of the inorganic fiber mat 1 is adhered in the longitudinal direction except for both ends with a plurality of adhesive layers 18, . . . A lower sheet-like material 5 is attached to both ends of the material 2 and the center portion of the lower surface of the inorganic fiber mat 1 via an adhesive 4.
Glue. In addition, both edge portions 38, 3 of the sheet-like material
8' is formed so as to protrude from both sides than the pine,
It is designed to be fixed to a pillar.
本発明方法により得られた表被材を被覆した無
機質繊維マツトは前記のように構成したもので、
表被材２は無機質繊維マツト１の上面に、複数個
所において長手方向に接着されているので、旋工
時に風によつて表被材２が円弧状にふくらむよう
なことがない。それ故、従来のように施工時に無
機質繊維マツトが露出して無機質繊維が飛散する
ようなことがない。 The inorganic fiber mat coated with the surface material obtained by the method of the present invention is constructed as described above,
Since the facing material 2 is adhered to the upper surface of the inorganic fiber mat 1 at a plurality of locations in the longitudinal direction, the facing material 2 does not swell into an arcuate shape due to wind during turning. Therefore, unlike the conventional method, the inorganic fiber mat is not exposed during construction and the inorganic fibers are not scattered.
又、壁面に取付けた後に、空気が表被材２とマ
ツトとの間及びマツト内を流れることにより断熱
性能の低下を来すことがない。 In addition, after it is attached to a wall surface, air flows between the covering material 2 and the mat and within the mat, which prevents the insulation performance from deteriorating.
更に又、表被材とマツト上面の接着は線条であ
るため、圧縮梱包後に開梱した際、十分に復元す
ることができる。 Furthermore, since the adhesive between the cover material and the top surface of the mat is linear, it can be fully restored when unpacked after being compressed and packed.
次に本発明方法を第２図以下に示す装置に基い
て詳細に説明すると、硬化されたグラスウールマ
ツト１はローラコンベヤ６によつて移送される。 Next, the method of the present invention will be explained in detail based on the apparatus shown in FIGS.
一方、ポリエチレンフイルム等の表被材２は軸
７に巻取られており、引出ロール８，９で引出さ
れ方向転換ロール１０，１１，１２，１３の案内
でグラスウールマツト１上に導入される。そし
て、引出ロール８，９と方向転換ロール１０との
間には接着剤箱１４が設置されており、この接着
剤箱１４中にはモータ１５で駆動される接着用ロ
ール軸１６（第３図参照）が横架されており、接
着用ロール軸１６には所定間隔をおいて複数個の
接着用ロール１７，……（３〜５個）が軸着され
ており、接着剤箱１４上を通過する表被材２の中
央部に所定間隔をおいて接着剤を付着させ接着層
１８，……を形成する。 On the other hand, a surface material 2 such as a polyethylene film is wound around a shaft 7, pulled out by pull-out rolls 8 and 9, and introduced onto the glass wool mat 1 under the guidance of direction change rolls 10, 11, 12, and 13. An adhesive box 14 is installed between the pull-out rolls 8 and 9 and the direction change roll 10, and an adhesive roll shaft 16 (see FIG. ) is hung horizontally, and a plurality of adhesive rolls 17, . Adhesive is applied to the center of the passing surface material 2 at a predetermined interval to form adhesive layers 18, . . . .
前記のように接着層１８，……を形成した表被
材２は方向転換ロール１０，……により方向を転
換させて接着層１８，……を下面に位置させ、抑
えロール１９及び押圧ロール２０によりグラスウ
ールマツト１上〔第４図イ参照〕に位置させられ
る。そして、押圧ロール２０の抑えロール１９側
には、両側に側面包みロール２１，２１′，２２，
２２′を設置されており、表被材２の両側を下方
に向つて直角に折曲げ、更に移動に伴い側面折曲
げロール２３，２３′，２４，２４′により完全に
グラスウールマツト１の側面に沿わせる〔第４図
ロ参照〕。更に移動すると、上側は側面抑えロー
ル２５，２５′，２６，２６′で抑えられ、下側は
下面包みロール２７，２８（一方は図示省略）に
より表被材２の側面をグラスウールマツト１の下
面に折込み、上下挾圧ロール２９，３０で第４図
ハに示すようにグラスウール１を包み込んだ状態
に形成する。尚、抑えロール１９及び上挾圧ロー
ル２９により接着層１８，……はグラスウールマ
ツト１の上面に接着される。 The surface material 2 on which the adhesive layers 18, . . . have been formed as described above is changed in direction by direction changing rolls 10, . It is placed on the glass wool mat 1 (see Fig. 4A). On the pressing roll 19 side of the pressing roll 20, side wrapping rolls 21, 21', 22,
22' is installed, and both sides of the cover material 2 are bent downward at right angles, and as it moves, it is completely folded onto the sides of the glass wool mat 1 by side bending rolls 23, 23', 24, 24'. (See Figure 4 B). As it moves further, the upper side is held down by side pressing rolls 25, 25', 26, 26', and the lower side is held down by lower wrapping rolls 27, 28 (one not shown) to wrap the side surface of the covering material 2 against the lower surface of the glass wool mat 1. The glass wool 1 is folded into a state in which it is wrapped around the glass wool 1 using upper and lower pressing rolls 29 and 30, as shown in FIG. The adhesive layers 18, .
一方、ローラコンベヤ６の下方には軸３１に巻
取られたクラフト紙で形成した下側シート状物５
が位置し、抑えロール３２，３２′で抑えられて
おり、引出ロール３３，３３′で引出され、シー
ト用ローラコンベヤ３４により移送される。この
移送の際に、上方に設置した溶融アスフアルト塗
布装置３５によりアスフアルト４を下側シート状
物５に例えば巾方向の端部付近を除いて全面に塗
布され両端を複数個のＵ字形をした折返部材４
０，４０，……で折返してアスフアルト４上に重
ね、押えロール４１で押えて耳部３８，３８′を
形成する〔第４図ハ参照〕。その後上昇コンベヤ
３６によりグラスウールマツト１側に上昇し、加
圧コンベヤ３７，３７′間をグラスウールマツト
１と共に移動し、その間に両者が加圧され、第４
図ニに示すように接着され、耳部３８，３８′を
両側に突出した被覆無機質繊維マツト３９を形成
する。尚、図面では省略したが、その後所定寸法
に切断し、圧縮梱包する。 On the other hand, below the roller conveyor 6 is a lower sheet-like material 5 formed of kraft paper wound around a shaft 31.
is located, held down by holding rolls 32, 32', pulled out by pull-out rolls 33, 33', and transported by a sheet roller conveyor 34. During this transfer, the molten asphalt coating device 35 installed above applies asphalt 4 to the entire surface of the lower sheet-like material 5 except for the vicinity of the edges in the width direction. Part 4
0, 40, . . . and stacked on the asphalt 4, and pressed with a presser roll 41 to form ears 38, 38' (see FIG. 4C). Thereafter, the ascending conveyor 36 raises the glass wool mat 1 and moves between the pressure conveyors 37 and 37' together with the glass wool mat 1, during which time both are pressurized and the fourth
As shown in FIG. 2, they are bonded to form a coated inorganic fiber mat 39 with ears 38, 38' projecting on both sides. Although not shown in the drawings, it is then cut into predetermined dimensions and compressed and packed.
尚、本発明に用いる無機質繊維マツトとはグラ
スウール、岩綿等が使用でき、綿状のふわふわし
たものである。 The inorganic fiber mat used in the present invention may be glass wool, rock wool, etc., and is cotton-like and fluffy.
本発明に用いる表被材としてはポリエチレン、
塩化ビニル、塩化ビニリデン、ポリプロピレン、
ポリエステル等のプラスチツクフイルム及びそれ
らの積層品並びにそれらとアルミ箔、紙等とのラ
ミネート品或は、それらにアルミ等を蒸着したも
の等が使用できる。 The surface material used in the present invention is polyethylene,
Vinyl chloride, vinylidene chloride, polypropylene,
Plastic films such as polyester, laminates thereof, laminates of them with aluminum foil, paper, etc., or products with aluminum or the like vapor-deposited thereon can be used.
又、本発明の下側シート状物としては前記プラ
スチツクフイルム或いはアスフアルト紙等及びそ
れらとアルミ箔及びそれら同志の積層シート状物
が使用できる。 Further, as the lower sheet-like material of the present invention, the above-mentioned plastic film, asphalt paper, etc., and a laminated sheet-like material of these, aluminum foil, and the like can be used.
更に、又、本発明に用いる接着剤としては、樹
脂系接着剤、ゴム系、アスフアルト系接着剤、等
各種の接着剤を使用することができる。 Furthermore, various adhesives such as resin adhesives, rubber adhesives, asphalt adhesives, etc. can be used as the adhesive used in the present invention.
本発明方法は前記のように構成したもので、表
被材２が剥離し難い被覆無機質繊維マツトを容易
に製造することができる。 With the method of the present invention configured as described above, it is possible to easily produce a coated inorganic fiber mat in which the surface material 2 is difficult to peel off.
又、表被材２は無機質繊維マツトの上面に簡単
に接着することができ、接着剤は表被材２に付着
して、しかも３〜５個の線条に付与されるため、
表被材のふくらみ及びこれに起因する断熱性の低
下を防止する効果は全面接着のものとほとんど変
らずしかも圧縮梱包後に開梱した際、十分に復元
することができる。 In addition, the surface material 2 can be easily adhered to the top surface of the inorganic fiber mat, and the adhesive adheres to the surface material 2 and is applied to 3 to 5 filaments.
The effect of preventing the bulge of the outer covering material and the deterioration of heat insulation properties caused by this is almost the same as that of fully adhesive adhesive, and it can be fully restored when unpacked after compression packaging.
又、表被材２が無機質繊維マツト１の上面に部
分的に接着されているため、表被材２が風により
円弧状にふくらむようなことがなく、所定寸法に
切断する際に表被材２の切断不良が生じたり、不
正確な寸法で切断されることがなく、切断時に表
被材２が切断装置に引掛つて破損する恐れがな
い。 In addition, since the cover material 2 is partially adhered to the top surface of the inorganic fiber mat 1, the cover material 2 will not swell into an arc shape due to wind, and the cover material 2 will not bulge in an arc shape due to the wind. There is no possibility of defective cutting of 2 or cutting with inaccurate dimensions, and there is no fear that the surface material 2 will be caught in the cutting device and damaged during cutting.
第１図は従来例を示す分解断面図、第２図は本
発明に係る表被材で被覆した無機質繊維マツトの
製造法に用いる装置の斜視図、第３図は接着剤付
着装置の断面図、第４図は工程を示す断面図であ
る。
尚、図中１は無機質繊維マツト、２は表被材、
５は下側シート状物である。
Fig. 1 is an exploded sectional view showing a conventional example, Fig. 2 is a perspective view of an apparatus used in the method for producing inorganic fiber mat covered with a surface material according to the present invention, and Fig. 3 is a sectional view of an adhesive application apparatus. , FIG. 4 is a sectional view showing the process. In addition, in the figure, 1 is the inorganic fiber mat, 2 is the surface material,
5 is a lower sheet-like material.
Claims (1)
複数列の接着層を長手方向に設けた表被材で接着
しながら覆い、その後、表被材の両端を無機質繊
維マツトの両側及び下面に沿つて折り込み、両端
を除いて一面に接着剤を塗布した下側シート状物
の両端を折返して両耳部を形成し、この下側シー
ト状物を無気質繊維マツトに押圧することにより
無気質繊維マツトの下面及び折込んだ表被材の両
端下面に接着することを特徴とする表被材で被覆
した無機質繊維マツトの製造法。1. Cover the top surface of the moving inorganic fiber mat with a cover material having multiple rows of adhesive layers in the longitudinal direction in the center, and then cover both ends of the cover material along both sides and the bottom surface of the inorganic fiber mat. The lower sheet-like material is folded in and coated with adhesive on one side except for both ends, and both ends are folded back to form both ears, and the lower sheet-like material is pressed against the non-porous fiber mat to form the non-porous fiber mat. A method for producing an inorganic fiber mat coated with a top covering material, characterized by adhering to the bottom surface of the mat and the bottom surface of both ends of a folded top covering material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6526080A JPS56161151A (en) | 1980-05-19 | 1980-05-19 | Inorganic fiber mat coated with coating material and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6526080A JPS56161151A (en) | 1980-05-19 | 1980-05-19 | Inorganic fiber mat coated with coating material and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56161151A JPS56161151A (en) | 1981-12-11 |
| JPS6359874B2 true JPS6359874B2 (en) | 1988-11-21 |
Family
ID=13281761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6526080A Granted JPS56161151A (en) | 1980-05-19 | 1980-05-19 | Inorganic fiber mat coated with coating material and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56161151A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0345848U (en) * | 1989-09-14 | 1991-04-26 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7045062B2 (en) * | 2018-05-22 | 2022-03-31 | 株式会社ホウセン | Insulation material skin covering device |
-
1980
- 1980-05-19 JP JP6526080A patent/JPS56161151A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0345848U (en) * | 1989-09-14 | 1991-04-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56161151A (en) | 1981-12-11 |
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