JPH05177632A - Preparation of sheet for stamp forming - Google Patents
Preparation of sheet for stamp formingInfo
- Publication number
- JPH05177632A JPH05177632A JP35806691A JP35806691A JPH05177632A JP H05177632 A JPH05177632 A JP H05177632A JP 35806691 A JP35806691 A JP 35806691A JP 35806691 A JP35806691 A JP 35806691A JP H05177632 A JPH05177632 A JP H05177632A
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing material
- thermoplastic resin
- belts
- sheet
- supplied
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はスタンプ成形用シートの
製造法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a stamp forming sheet.
【０００２】[0002]
【従来の技術】ガラス繊維マット等の補強材に、熱可塑
性樹脂を含浸させたシートは、スタンプ成形法によりＦ
ＲＴＰを製造するための成形材料（スタンプ成形用シー
ト）として広く用いられている。又、補強繊維として
は、ガラス繊維よりなるシートが用いられていることが
多い。補強材としては、長尺のガラス繊維束をループ状
をなして堆積させたＣＳＭ或は、ガラス繊維束の切断物
（ＣＳ）を堆積させたＣＭが広く用いられる。ＣＳＭ，
ＣＭのハンドリング性を良好ならしめるために、、マッ
トバインダを附与し、或はニードリングを行ない、マッ
トに形状保持性を附与することも知られている。スタン
プ成形用シートの製造法として、所定間隙を隔てて水平
方向に回動する上下一対のベルトにより移動通路を形成
させ、上記ベルト間に熱可塑性樹脂と補強材とを供給し
て、ベルトで挾圧しつつ移動させるとともに、移動通路
の入口付近で加熱し、出口付近で冷却することにより熱
可塑性樹脂を補強材に含浸させるる方法（ベルト法）が
知られている。強度の大きいＦＲＴＰ成形品を得るため
に、長手方向に引揃えた連続繊維が併用される。2. Description of the Related Art A sheet obtained by impregnating a reinforcing material such as a glass fiber mat with a thermoplastic resin is subjected to a stamping method to form an F sheet.
It is widely used as a molding material (sheet for stamp molding) for producing RTP. In addition, a sheet made of glass fiber is often used as the reinforcing fiber. As the reinforcing material, CSM in which long glass fiber bundles are deposited in a loop shape or CM in which cut pieces (CS) of glass fiber bundles are deposited are widely used. CSM,
In order to improve the handling property of CM, it is also known to add a mat binder or perform needling to give the mat shape retention. As a method for manufacturing a stamp-forming sheet, a moving path is formed by a pair of upper and lower belts that horizontally rotate with a predetermined gap, and a thermoplastic resin and a reinforcing material are supplied between the belts and sandwiched by the belts. A method (belt method) is known in which the reinforcing material is impregnated with the reinforcing material by moving the material under pressure while heating the material near the inlet of the moving passage and cooling it near the outlet. In order to obtain a FRTP molded product having high strength, continuous fibers aligned in the longitudinal direction are used together.
【０００３】[0003]
【発明が解決しようとする課題】従来技術は、次のよう
な問題点を有する。近時、省資源、公害防止のためにリ
サイクルが行なわれるようになった。ＦＲＴＰ成形品を
リサイクルするための方法として、成形品を加熱、溶融
し、そのまま再スタンプする方法（第１方法）と、成形
品を一旦粉砕して、再使用する方法（第２方法）とが考
えられるが、これらの方法は次のような問題点を有す
る。 第１方法 長手方向に配設された連続繊維が、再スタンプする際
に、シートの流動性を阻害したり、又再スタンプ時に連
続繊維がずれたり、めくれ上がったり、交差したりし
て、再スタンプによって得られた成形品の外観や性能を
著しく劣化させる。 第２方法 長尺の連続繊維を使用したＦＲＴＰ成形品は、粉砕が極
めて困難である。The prior art has the following problems. Recently, recycling has begun to save resources and prevent pollution. As a method for recycling the FRTP molded product, there are a method of heating and melting the molded product and re-stamping as it is (first method), and a method of crushing the molded product once and reusing it (second method). Although conceivable, these methods have the following problems. First method The continuous fibers arranged in the longitudinal direction impede the fluidity of the sheet when re-stamping, and the continuous fibers are displaced, turned up or crossed during re-stamping, and re-stamped. It significantly deteriorates the appearance and performance of the molded product obtained by. Second Method FRTP molded products using long continuous fibers are extremely difficult to grind.
【０００４】本発明者は、上記問題点を解消するため検
討を重ねた結果、補強材に熱可塑性樹脂を含浸させてな
り、且つ長さ０．５〜３０ｃｍのテープ状補強材を、複
数本、熱可塑性樹脂と補強材とからなる複合シートの少
なくとも一方の面に、長手方向に沿って、重ねたことを
特徴とするスタンプ成形用シートを用いることにより極
めて好適な結果を得られることを見出し、特許出願を行
なった。（以下先発明シートという）本発明は、ベルト
法を使用し、先発明シートを製造するための工業的製法
を提供することを目的とする。As a result of repeated studies to solve the above-mentioned problems, the present inventor has obtained a plurality of tape-shaped reinforcing members having a reinforcing material impregnated with a thermoplastic resin and having a length of 0.5 to 30 cm. It was found that extremely suitable results can be obtained by using a stamp-forming sheet characterized by being laminated on at least one surface of a composite sheet composed of a thermoplastic resin and a reinforcing material along the longitudinal direction. , Filed a patent application. The present invention (hereinafter referred to as a prior invention sheet) has an object to provide an industrial production method for producing a prior invention sheet by using a belt method.
【０００５】[0005]
【課題を解決するための手段】本発明においては、上記
目的を達成するために、所定間隙を隔てて水平方向に回
動する上下一対のベルトにより移動通路を形成させ、上
記ベルト間に熱可塑性樹脂と補強材とを供給してベルト
で挾圧しつつ移動させるとともに、移動通路の入口部付
近で加熱し、出口付近で冷却することにより熱可塑性樹
脂を補強材に含浸させてスタンプ成形用シートを製造法
するに際し、熱可塑性樹脂を補強部材に含浸させてなる
テープ状補強材を通路の手前において、ベルト上に供給
することによりスタンプ成形用シートを製造する。In the present invention, in order to achieve the above object, a moving passage is formed by a pair of upper and lower belts which horizontally rotate with a predetermined gap, and a thermoplastic passage is formed between the belts. While supplying the resin and the reinforcing material while moving them while pressing them with the belt, the reinforcing material is impregnated with the thermoplastic resin by heating near the inlet of the moving passage and cooling near the outlet to form the stamp forming sheet. In the manufacturing method, a stamp-forming sheet is manufactured by supplying a tape-shaped reinforcing material obtained by impregnating a reinforcing member with a thermoplastic resin onto a belt in front of a passage.
【０００６】次に、本発明を、更に具体的に説明する。
テープ状補強材１を得るための補強部材としては、ガラ
ス繊維に集束剤を附与、集束したガラス繊維束を用いる
のが適当である。ガラス繊維としては、平均直径６〜２
５μｍ、望ましくは９〜２０μｍのものを好適に用いる
ことができる。ガラス繊維の集束本数、及びガラス繊維
束のＴｅｘ、即ち１，０００ｍ当りのｇｒ数は、夫々５
０〜５０，０００本、１０〜６０，０００、望ましくは
５０〜１０，０００本、１０〜１２，０００とするのが
好ましい。集束剤の附与量は、固型分として０．０５〜
１．５ｗｔ％、望ましくは０．１〜１．０ｗｔ％とする
のが適当である。補強部材に含浸させる熱可塑性樹脂と
しては、後述する熱可塑性樹脂と同じものを用いるの
が、リサイクル上好ましく、ＰＥ，ＰＰ，ＰＥＴ，ＰＢ
Ｔ，ＮＹ，ＰＰＳ等が例示される。Next, the present invention will be described more specifically.
As a reinforcing member for obtaining the tape-shaped reinforcing material 1, it is suitable to use a glass fiber bundle obtained by adding and focusing a sizing agent to glass fibers. As a glass fiber, the average diameter is 6 to 2
Those having a thickness of 5 μm, preferably 9 to 20 μm can be preferably used. The number of bundles of glass fibers and the Tex of glass fiber bundles, ie, the number of gr per 1,000 m, are 5 respectively.
The number is preferably 0 to 50,000, 10 to 60,000, and more preferably 50 to 10,000, and 10 to 12,000. The amount of sizing agent added is 0.05-
It is suitable to be 1.5 wt%, preferably 0.1 to 1.0 wt%. As the thermoplastic resin with which the reinforcing member is impregnated, it is preferable to use the same thermoplastic resin as described later in terms of recycling. PE, PP, PET, PB
T, NY, PPS, etc. are illustrated.
【０００７】熱可塑性樹脂を補強部材に含浸させる方法
に特に限定はなく、例えば、ロービングのような補強材
を、溶融した熱可塑性樹脂中を連続的に通過させ、ロー
ルで挟圧することにより、熱可塑性樹脂が均一に含浸さ
せた偏平なテープ状補強材１を得ることができる。補強
部材に対する熱可塑性樹脂の附与量は、補強部材の重量
が補強部材と熱可塑性樹脂の合計量の１０〜８０ｗｔ
％、又テープ状補強材１の厚み、巾は、夫々０．０２〜
２ｍｍ，１〜５０ｍｍ、望ましくは０．０３〜１ｍｍ，
１〜３０ｍｍとするのが適当である。There is no particular limitation on the method of impregnating the reinforcing member with the thermoplastic resin. For example, a reinforcing material such as roving is continuously passed through the molten thermoplastic resin, and is pressed by a roll to heat the material. It is possible to obtain the flat tape-shaped reinforcing material 1 in which the plastic resin is uniformly impregnated. Regarding the amount of the thermoplastic resin added to the reinforcing member, the weight of the reinforcing member is 10 to 80 wt of the total amount of the reinforcing member and the thermoplastic resin.
%, And the thickness and width of the tape-shaped reinforcing member 1 are 0.02 to 0.02, respectively.
2 mm, 1 to 50 mm, preferably 0.03 to 1 mm,
It is suitable to set it to 1 to 30 mm.
【０００８】ベルト２，３を夫々一対の誘導ロール４，
４；５，５で支持し、所定の間隙を隔てて、水平方向に
矢印の方向に回動せしめ、このベルト間に水平方向に延
びる移動通路６を形成させる。なお、７は後述するよう
に通路６内に供給される熱可塑性樹脂と補強材等を押圧
するための押圧ロールである。The belts 2 and 3 are provided with a pair of guide rolls 4 and 4, respectively.
4; 5 and 5 are supported, and are horizontally rotated in the direction of the arrow with a predetermined gap therebetween to form a moving passage 6 extending horizontally between the belts. Reference numeral 7 is a pressing roll for pressing the thermoplastic resin and the reinforcing material supplied into the passage 6 as described later.
【０００９】テープ状補強材１を０．５〜３０ｃｍ、望
ましくは１〜１０ｃｍの長さに切断し、この切断物８
を、通路６の手前においてベルト２，３の少なくとも一
方の面上に供給する。なお、９は、テープ状補強材１を
切断するためのカッターである。なお、切断物８同志
は、その巾方向に間隔がないように配列してもよく、又
巾方向に若干の間隔が形成されてるよう配列することも
できる。なお、切断物８同志の長手方向の切れ目１０の
位置は、平行に隣接する切断物２同志の切れ目１０と若
干づれるように配置するのが望ましい。切断物８は加熱
されたベルトで加熱されて、ベルトに粘着し、通路６内
に、後述する補強材１２とともに引き込まれる。なお、
切断物８は上方のベルト２の上面に供給してもよく、或
は下方のベルト３を上方のベルト２より長く形成し、下
方のベルト３の入口付近に供給してもよい。The tape-like reinforcing material 1 is cut into a length of 0.5 to 30 cm, preferably 1 to 10 cm, and the cut product 8
Is supplied to at least one surface of the belts 2 and 3 before the passage 6. In addition, 9 is a cutter for cutting the tape-shaped reinforcing material 1. The cut objects 8 may be arranged so that there is no space in the width direction, or they may be arranged so as to have a slight space in the width direction. The position of the cut 10 in the longitudinal direction of the cut objects 8 is preferably arranged so as to be slightly offset from the cut 10 of the cut objects 2 that are adjacent to each other in parallel. The cut object 8 is heated by the heated belt, adheres to the belt, and is drawn into the passage 6 together with the reinforcing material 12 described later. In addition,
The cut object 8 may be supplied to the upper surface of the upper belt 2, or the lower belt 3 may be formed longer than the upper belt 2 and supplied to the vicinity of the entrance of the lower belt 3.
【００１０】ベルト２，３の間に熱可塑性樹脂１１と補
強材１２とを供給する。補強材１２としては、平均直径
６〜２５μｍ、望ましくは９〜２０μｍのガラス繊維
に、ポリオレフィンエマルジョンのような被膜形成剤を
１〜１０ｗｔ％、望ましくは２〜６ｗｔ％、ノニオン系
界面活性剤のような潤滑剤を０．０５〜１．５ｗｔ％、
望ましくは、０．１〜１ｗｔ％、アミノシランのような
カップリング剤を０．０５〜１．５ｗｔ％、望ましくは
０．１〜１ｗｔ％、含む集束剤を、固型分として、０．
１〜１．５ｗｔ％、望ましくは０．２〜１ｗｔ％附与
し、５０〜８，０００本、望ましくは８０〜４，０００
本集束してなる、Ｔｅｘ即ち、１，０００ｍ当りの重量
（ｇｒ）が１０〜１，０００、望ましくは１５〜５，０
００のガラス繊維束の切断物（ＣＳ）よりなるＣＭが適
当である。又、ＣＳの長さは３〜１，０００ｍｍ、望ま
しくは６〜３００ｍｍ、ＣＭの１ｍ2 当りの重量は１０
〜２，０００ｇｒ、望ましくは５０〜１，０００ｇｒの
ものを好適に用いることができる。A thermoplastic resin 11 and a reinforcing material 12 are supplied between the belts 2 and 3. As the reinforcing material 12, a glass fiber having an average diameter of 6 to 25 μm, preferably 9 to 20 μm, and a film forming agent such as a polyolefin emulsion is used in an amount of 1 to 10 wt%, preferably 2 to 6 wt%, and a nonionic surfactant is used. 0.05 to 1.5 wt% of various lubricants,
Desirably, a sizing agent containing 0.1 to 1 wt% and a coupling agent such as aminosilane in an amount of 0.05 to 1.5 wt%, preferably 0.1 to 1 wt% is used as a solid component of 0.
1 to 1.5% by weight, preferably 0.2 to 1% by weight, 50 to 8,000, preferably 80 to 4,000
Tex, ie, the weight (gr) per 1,000 m formed by the main focusing, is 10 to 1,000, preferably 15 to 5,000.
A CM consisting of a 00 cut glass fiber bundle (CS) is suitable. Further, the length of CS is 3 to 1,000 mm, preferably 6 to 300 mm, and the weight per 1 m 2 of CM is 10.
˜2,000 gr, preferably 50 to 1,000 gr can be preferably used.
【００１１】補強材とともに供給する熱可塑性樹脂の種
類に特に限定はなく、ＰＥ，ＰＰ，ＰＥＴ，ＰＢＴ，Ｎ
Ｙ，ＰＰＳ等が例示される。熱可塑性樹脂の量は、補強
材と熱可塑性樹脂の合計重量に対する補強材の重量が１
０〜７０ｗｔ％、望ましくは２０〜５０ｗｔ％となるよ
うに定めるのが適当である。なお、熱可塑性樹脂１１は
供給装置１３を使用し、溶融物として、或は粉末又は粒
状物として供給してもよく、或いは又フィルム状物とし
て供給することもできる。The kind of thermoplastic resin supplied together with the reinforcing material is not particularly limited, and PE, PP, PET, PBT, N
Y, PPS, etc. are illustrated. The amount of the thermoplastic resin is 1 weight of the reinforcing material to the total weight of the reinforcing material and the thermoplastic resin.
It is appropriate to set it to be 0 to 70 wt%, preferably 20 to 50 wt%. The thermoplastic resin 11 may be supplied as a melt, powder or granules using the supply device 13, or may be supplied as a film.
【００１２】移動通路６には、移動通路の入口１４付近
に加熱装置１５が、出口１６付近に冷却装置１７が設け
られている。加熱装置としては電熱ヒーター、誘電加熱
装置を、冷却装置としては、冷却ロール等を用いること
ができる。ベルト２，３間に供給された補強材１２と熱
可塑性樹脂１１及び切断物８は、ベルトの回動により移
動通路内を矢印の方向に、ベルト２，３で押圧されつつ
移動する。この間に加熱装置で熱可塑性樹脂は加熱さ
れ、溶融、軟化して補強材に含浸せしめられ、冷却装置
で冷却されてスタンプ成形用シート１８が得られる。The moving passage 6 is provided with a heating device 15 near the inlet 14 of the moving passage and a cooling device 17 near the outlet 16. An electric heater or an inductive heating device can be used as the heating device, and a cooling roll or the like can be used as the cooling device. The reinforcing material 12, the thermoplastic resin 11, and the cut material 8 supplied between the belts 2 and 3 move in the direction of the arrow in the movement path by the rotation of the belt while being pressed by the belts 2 and 3. During this time, the thermoplastic resin is heated by the heating device, melted and softened to be impregnated into the reinforcing material, and cooled by the cooling device to obtain the stamp forming sheet 18.
【００１３】[0013]
【作用】所定間隙を隔てて水平方向に回動する上下一対
のベルトにより移動通路を形成させ、上記ベルト間に熱
可塑性樹脂と補強材とを供給してベルトで挾圧しつつ移
動させるとともに、移動通路の入口部付近で加熱し、出
口付近で冷却することにより熱可塑性樹脂を補強材に含
浸させてスタンプ成形用シートを製造法するに際し、熱
可塑性樹脂を補強部材に含浸させてなるテープ状補強材
を通路の手前において、ベルト上に供給することによ
り、成形性が良く、強度の大きい、リサイクルが容易な
ＦＲＴＰ成形品の得られるようなスタンプ成形用シート
を工業的に得ることができる。Operation: A pair of upper and lower belts that rotate horizontally with a predetermined gap form a moving path, and a thermoplastic resin and a reinforcing material are supplied between the belts to move the belt while pressing it with the belt. Reinforcing tape-like reinforcement by impregnating a reinforcing member with a thermoplastic resin when manufacturing a stamp molding sheet by impregnating the reinforcing resin with a thermoplastic resin by heating near the inlet of the passage and cooling near the outlet By supplying the material onto the belt in front of the passage, it is possible to industrially obtain a stamp-forming sheet having good moldability, high strength, and an easily recyclable FRTP molded article.
【００１４】[0014]
【実施例】平均直径１３μｍのガラス繊維に、集束剤
を、固型分として０．５ｗｔ％附与し、６，４００本集
束してなるＴｅｘ２，２００のストランド６７重量部
に、ＰＰを３３重量部附与し、２００℃においてロール
で挟圧し、厚み０．５ｍｍ、巾約１２ｍｍのテープ状補
強材を得た。一対の水平方向に回動するベルト間に、厚
み（上下の間隙）４ｍｍ、長さ５００ｃｍｍの通路を形
成させ、通路の入口部付近を２００℃に加熱し、又出口
部付近を５０℃に冷却した。ベルト２の上面に、上記テ
ープ状補強材を５ｃｍの長さに切断した切断物を切れ目
間の間隔１ｍｍ、巾方向の間隔１ｍｍとなるよう供給し
た。直径１３μｍのガラス繊維に、集束剤を、固型分と
して、０．５ｗｔ％附与集束してなるＴｅｘ５７５のス
トランドを１３ｍｍに切断したＣＳよりなる、１，００
０ｇｒ／ｍ2 のＣＭ２枚の間に、厚み１．６ｍｍのＰＰ
フィルムを挾み、且つＣＭの上下に夫々厚み０．８ｍｍ
のＰＰフィルムを重ねてベルト間に供給することにより
スタンプ成形用シートを得た。このシートは成形性も良
く、又このシートを用いて得られたＦＲＴＰ成形品は強
度も大きく、リサイクルも容易であった。EXAMPLE A sizing agent of 0.5 wt% was added to glass fiber having an average diameter of 13 μm as a solid component, and 6,400 strands of Tex 2,200 formed by concentrating 6,400 strands were added with 33 parts of PP by 33 parts by weight. A part of the tape-shaped reinforcing material having a thickness of 0.5 mm and a width of about 12 mm was obtained by pressing with a roll at 200 ° C. A passage having a thickness (upper and lower gap) of 4 mm and a length of 500 cmm is formed between a pair of horizontally rotating belts, the vicinity of the inlet of the passage is heated to 200 ° C, and the vicinity of the outlet is cooled to 50 ° C. did. On the upper surface of the belt 2, cut products obtained by cutting the tape-like reinforcing material into a length of 5 cm were supplied so that the gap between the cuts was 1 mm and the gap in the width direction was 1 mm. A glass fiber having a diameter of 13 μm and a sizing agent as a solid component was added at 0.5 wt% and bundled with Tex575.
Between two sheets of 0 gr / m 2 CM, PP with a thickness of 1.6 mm
The thickness of the film is 0.8mm above and below the CM.
A sheet for stamp molding was obtained by stacking the PP films of 1 above and supplying them between the belts. This sheet had good moldability, and the FRTP molded product obtained using this sheet had high strength and was easy to recycle.
【００１５】[0015]
【発明の効果】成形性が良好であり、強度が大きく、リ
サイクルの容易なＦＲＴＰ成形品を工業的に得ることが
できる。INDUSTRIAL APPLICABILITY A FRTP molded product having good moldability, high strength, and easy recycling can be industrially obtained.
【００１６】[0016]
【図１】本発明の方法を説明するための正面図。FIG. 1 is a front view for explaining a method of the present invention.
【図２】本発明の方法で得られたスタンプ成形用シート
の平面図である。FIG. 2 is a plan view of a stamp forming sheet obtained by the method of the present invention.
【図３】本発明の方法で得られたスタンプ成形用シート
の平面図である。FIG. 3 is a plan view of a stamp forming sheet obtained by the method of the present invention.
１ テープ状補強材 ２ ベルト ３ ベルト ４ 誘導ロール ５ 誘導ロール ６ 移動通路 ７ 押圧ロール ８ 切断物 ９ カッター １０ 切れ目 １１ 熱可塑性樹脂 １２ 補強材 １３ 供給装置 １４ 入口 １５ 加熱装置 １６ 出口 １７ 冷却装置 １８ スタンプ成形用シート 1 Tape Reinforcement Material 2 Belt 3 Belt 4 Induction Roll 5 Induction Roll 6 Moving Passage 7 Pressing Roll 8 Cut Material 9 Cutter 10 Break 11 Thermoplastic Resin 12 Reinforcement Material 13 Supply Device 14 Inlet 15 Heating Device 16 Outlet 17 Cooling Device 18 Stamp Molding sheet
Claims (1)
上下一対のベルトにより移動通路を形成させ、上記ベル
ト間に熱可塑性樹脂と補強材とを供給してベルトで挾圧
しつつ移動させるとともに、移動通路の入口部付近で加
熱し、出口付近で冷却することにより熱可塑性樹脂を補
強材に含浸させるスタンプ成形用シートの製造法におい
て、熱可塑性樹脂を補強部材に含浸させてなるテープ状
補強材を、通路の手前において、ベルト上に供給するこ
とを特徴とするスタンプ成形用シートの製造法。1. A moving path is formed by a pair of upper and lower belts that rotate horizontally with a predetermined gap therebetween, and a thermoplastic resin and a reinforcing material are supplied between the belts to move the belt while compressing the belt. In a method of manufacturing a stamp forming sheet in which a reinforcing material is impregnated with a thermoplastic resin by heating near the entrance of the moving passage and cooling near the exit, tape-like reinforcement obtained by impregnating the reinforcing member with the thermoplastic resin A method for manufacturing a stamp forming sheet, characterized in that the material is supplied onto a belt before the passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35806691A JPH085058B2 (en) | 1991-12-27 | 1991-12-27 | Stamp molding sheet manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35806691A JPH085058B2 (en) | 1991-12-27 | 1991-12-27 | Stamp molding sheet manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05177632A true JPH05177632A (en) | 1993-07-20 |
| JPH085058B2 JPH085058B2 (en) | 1996-01-24 |
Family
ID=18457361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35806691A Expired - Lifetime JPH085058B2 (en) | 1991-12-27 | 1991-12-27 | Stamp molding sheet manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH085058B2 (en) |
-
1991
- 1991-12-27 JP JP35806691A patent/JPH085058B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH085058B2 (en) | 1996-01-24 |
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