JP2923010B2 - Vacuum forming bonding method - Google Patents
Vacuum forming bonding methodInfo
- Publication number
- JP2923010B2 JP2923010B2 JP2230887A JP23088790A JP2923010B2 JP 2923010 B2 JP2923010 B2 JP 2923010B2 JP 2230887 A JP2230887 A JP 2230887A JP 23088790 A JP23088790 A JP 23088790A JP 2923010 B2 JP2923010 B2 JP 2923010B2
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- vacuum forming
- skin material
- primer
- bonding
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は真空成形接着方法、更に詳しくは、難接着の
ポリオレフィン発泡体を自動車内装部品の表皮材とし
て、基材層に真空成形と同時に接着する方法に関する。Description: FIELD OF THE INVENTION The present invention relates to a vacuum forming and bonding method, and more particularly, to a method of bonding a poorly bonding polyolefin foam as a surface material of an automobile interior part to a base material layer simultaneously with vacuum forming. About.
従来技術と発明が解決しようとする課題 自動車内装部品は、高級化の目的から、各種の基材層
にポリオレフィン発泡体表皮材を積層させたものが使用
されつつあり、かかる積層体の製造方法としては、たと
えば上記基材層にポリオレフィン発泡体表皮材を付与
し、真空成形法で両者の成形と接着を同時に行う方法が
採用されている。Prior Art and Problems to be Solved by the Invention Automotive interior parts are being used in which a polyolefin foam skin material is laminated on various base material layers for the purpose of upgrading, and as a method for producing such a laminate, For example, a method is employed in which a polyolefin foam skin material is applied to the above-described base material layer, and both molding and bonding are performed simultaneously by a vacuum molding method.
ところで、このような接着方法では、ポリオレフィン
発泡体表皮材が難接着であり、複雑な形状の基材層に沿
って加熱しながら真空成形接着する場合に、表皮材の伸
縮変形に伴う応力の発生により、冷却放置後基材層の凹
部形状部分における剥離、浮き等の接着不良が発生する
ことがあるなどの難点があった。By the way, in such a bonding method, the polyolefin foam skin material is difficult to bond, and when performing vacuum forming bonding while heating along a base material layer having a complicated shape, generation of stress due to expansion and contraction deformation of the skin material is generated. Therefore, there was a problem that adhesion failure such as peeling or floating may occur in the concave portion of the base material layer after being left to cool.
また、従来の接着剤を用いる自動車内装部品の真空成
形接着方法では、接着剤としてはポリエステルポリウレ
タンを溶剤に溶融せしめた溶剤系のものであり、自動車
内装用途に要求される耐熱性を満足させる目的で硬化剤
（ポリイソシアネート化合物）を混合する二液型接着剤
が用いられている。これは真空成形接着する工程で、接
着の直前に塗布する必要があり、二液型接着剤の混合の
手間乃至混合後の接着するまでの使用時間の制限、およ
び有機溶剤の揮散に伴う環境汚染の問題、安全衛生の問
題などから、二液型接着剤に比肩する耐熱性と成形接着
ラインの脱溶剤化が望まれていた。In the conventional vacuum forming and bonding method for automotive interior parts using an adhesive, the adhesive is a solvent-based adhesive obtained by melting a polyester polyurethane in a solvent, and is intended to satisfy the heat resistance required for automotive interior applications. And a two-part adhesive for mixing a curing agent (polyisocyanate compound). This is a process of vacuum forming and bonding, which must be applied immediately before bonding, which limits the time required for mixing two-part adhesives to the time required for bonding after mixing, and environmental pollution due to the volatilization of organic solvents. In view of the above problems, safety and health, and the like, there has been a demand for heat resistance comparable to that of a two-part adhesive and desolvation of a molding adhesive line.
課題を解決するための手段 本発明者らは、かかる要望に応えるため種々検討を進
めたところ、ポリオレフィン発泡体表皮材に予じめ特定
の接着プライマーとポリエステルポリウレタン接着剤を
塗布しておけば、ポリオレフィン発泡体に対する接着性
と耐熱性の向上、および成形接着ラインでの脱溶剤化を
図ることができることを見出し、さらに、特に架橋反応
を伴わなくても、自動車内装用途で要求される耐熱性を
満足し、かつ従来の真空成形条件で十分な接着力を発揮
し、しかも当該接着剤のポリエステルポリウレタンはホ
ットメルト樹脂であるため、熱溶融ラミネーション塗
布、すなわち無溶剤塗布ができることを見出し、本発明
を完成させるに至った。Means for Solving the Problems The present inventors have conducted various studies in order to respond to such a demand, and if a specific adhesive primer and a polyester polyurethane adhesive have been applied to a polyolefin foam skin material in advance, It has been found that the adhesiveness and heat resistance of polyolefin foam can be improved, and that solvent removal can be achieved in the molding and bonding line. Furthermore, the heat resistance required for automotive interior applications is not particularly required without a crosslinking reaction. It has been found that since the polyester polyurethane of the adhesive is a hot melt resin, it can be applied by hot-melt lamination coating, that is, solvent-free coating, and the present invention is satisfied. It was completed.
すなわち、本発明は、ポリオレフィン発泡体表皮材
に、水添ポリブタジエングリコールと過剰量のポリイソ
シアネート化合物の反応によって得られる活性イソシア
ネート基含有ウレタンプレポリマーを成分とする接着プ
ライマーを塗布、乾燥し、次いで該接着プライマー塗布
面に、ヘキサングリコールとアジピン酸を主原料とする
ポリエステルポリオール成分を主成分として含む分子量
５万〜30万のポリエステルポリウレタンから成る接着剤
を溶液状態で塗布、乾燥または熱溶融状態で塗布した
後、かかる接着剤を予じめ塗布した表皮材を基材層に重
ね合せて真空成形と同時に接着することを特徴とする真
空成形接着方法を提供するものである。That is, the present invention provides a polyolefin foam skin material coated with an adhesive primer containing an active isocyanate group-containing urethane prepolymer obtained by the reaction of hydrogenated polybutadiene glycol and an excess amount of a polyisocyanate compound, followed by drying, followed by drying. An adhesive composed of a polyester polyurethane having a molecular weight of 50,000 to 300,000 and containing a polyester polyol component mainly composed of hexane glycol and adipic acid as a main component is applied in a solution state to the surface to which the adhesive primer is applied, and is applied in a dry or hot melt state. After that, the present invention provides a vacuum forming bonding method characterized in that a skin material coated in advance with such an adhesive is superimposed on a base material layer and bonded simultaneously with vacuum forming.
本発明において自動車内装部品に用いるポリオレフィ
ン発泡体表皮材には、たとえばポリエチレン、ポリプロ
ピレン、EPDMなどの表皮層を有する発泡体が挙げられ
る。In the present invention, examples of the polyolefin foam skin material used for automobile interior parts include foams having a skin layer such as polyethylene, polypropylene, and EPDM.
本発明において、ポリオレフィン発泡体表皮材との接
着力を構造させる接着プライマーは、水添ポリブタジエ
ングリコールと過剰量のポリイソシアネート化合物［た
とえばヘキサメチレンジイソシアネート、2,2,4−トリ
メチルヘキサメチレンジイソシアネート、リジンメチル
エステルジイソシアネートなどの脂肪族ポリイソシアネ
ート類、水添ジフェニルメタンジイソシアネート、イソ
ホロンジイソシアネート、水添トリレンジイソシアネー
トなどの脂環式ポリイソシアネート類、トリレンジイソ
シアネート（TDI）、ジフェニルメタンジイソシアネー
ト（MDI）、ナフチレンジイソシアネート、キシリレン
ジイソシアネート、トリフェニルメタントリイソシアネ
ート、トリス（４−フェニルイソシアネート）チオホス
フェートなどの芳香族ポリイソシアネート類］との反応
により得られる活性イソシアネート基（NCO）含有ウレ
タンプレポリマー（通常、活性NCO含有量２〜20重量％
に調整）で構成される。上記反応は、要すれば触媒（た
とえばジブチルチンジラルリレート、トリエチルアミ
ン、オクチル酸鉛など）や反応溶媒（たとえばヘキサ
ン、トルエン、ヘプタン、シクロヘキサン、キシレンな
ど）の存在下、常温乃至40〜80℃で４〜30時間の条件で
行えばよい。In the present invention, the adhesion primer for structuring the adhesion to the polyolefin foam skin material comprises hydrogenated polybutadiene glycol and an excess amount of a polyisocyanate compound [for example, hexamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, lysine methyl Aliphatic polyisocyanates such as ester diisocyanate, alicyclic polyisocyanates such as hydrogenated diphenylmethane diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), naphthylene diisocyanate, xylylene Aromatic poly such as diisocyanate, triphenylmethane triisocyanate, tris (4-phenylisocyanate) thiophosphate Active isocyanate group obtained by the reaction between isocyanate compound] (NCO) containing urethane prepolymer (usually active NCO content of 2 to 20 wt%
Adjustment). The above reaction may be carried out at room temperature to 40 to 80 ° C., if necessary, in the presence of a catalyst (eg, dibutyltin diallylate, triethylamine, lead octylate, etc.) and a reaction solvent (eg, hexane, toluene, heptane, cyclohexane, xylene, etc.). It may be performed under the condition of 4 to 30 hours.
一方、本発明で用いる真空成形接着用接着剤は、ヘキ
サングリコールのアジピン酸を主原料とするポリエステ
ル（実質的にヘキサングリコールとアジピン酸の２成分
以外に、たとえばエチレングリコール、プロピレングリ
コール、ジエチレングリコール、ジプロピレングリコー
ル、ネオペンチルグリコール、1,3−ブタンジオール、
1,4−ブタンジオール、水素化ビスフェノールＡ、無水
フタル酸、イソフタル酸、テレフタル酸、テトラヒドロ
無水フタル酸、メチルテトラヒドロ無水フタル酸、エン
ドメチレンテトラヒドロ無水フタル酸、セバシン酸など
の副原料を反応させたポリエステルも含まれる）をポリ
オール成分として用い、これに通常のイソシアネート成
分（たとえば2,4−トリレンジイソシアネート、2,6−ト
リレンジイソシアネート、4,4′−ジフェニルメタンジ
イソシアネート、トリデンジイソシアネート、ヘキサメ
チレンジイソシアネート、トリメチルヘキサメチレンジ
イソシアネート）を反応させて得られる分子量５万〜30
万のポリエステルポリウレタンから成り、これらはたと
えばバイエル（株）製、「デスモコール＃500」；大日
本インキ化学工業（株）製、「パンデックスＴ−526
5」；カゾケミカル（株）製、「カゾボンドＫ−150
T」；アイロマーケミカル（株）製、「アイロスティッ
ク212K」の商品名で市販されている。ポリエステルポリ
ウレタンの分子量が５万未満であると、耐熱性が劣り、
また30万を越えると、接着性が低下する。On the other hand, the adhesive for vacuum forming and bonding used in the present invention is a polyester containing adipic acid of hexane glycol as a main material (in addition to substantially two components of hexane glycol and adipic acid, for example, ethylene glycol, propylene glycol, diethylene glycol, diethylene glycol, Propylene glycol, neopentyl glycol, 1,3-butanediol,
Secondary materials such as 1,4-butanediol, hydrogenated bisphenol A, phthalic anhydride, isophthalic acid, terephthalic acid, tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride, endmethylenetetrahydrophthalic anhydride, and sebacic acid were reacted. Polyester is also used as a polyol component, and a normal isocyanate component (for example, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, triden diisocyanate, hexamethylene diisocyanate) , Trimethylhexamethylene diisocyanate) to obtain a molecular weight of 50,000 to 30
These are made of, for example, "Desmocall # 500" manufactured by Bayer K.K .; "PANDEX T-526" manufactured by Dainippon Ink and Chemicals, Inc.
5 "; manufactured by Kazo Chemical Co., Ltd.," Kazobond K-150 "
T "; commercially available under the trade name" Irostick 212K "manufactured by Iromar Chemical Co., Ltd. If the molecular weight of the polyester polyurethane is less than 50,000, heat resistance is poor,
If it exceeds 300,000, the adhesiveness is reduced.
上記ポリエステルポリウレタンは、そのまま（常温固
形）あるいは適当な溶剤（メチルエチルケトン、アセト
ン、トルエン、酢酸エチル、トリクロルエタン）に溶解
した系で構成され、さらに必要に応じて通常のウレタン
架橋触媒、染顔料、可塑剤、ブロック化ポリイソシアネ
ート化合物などを添加してもよい。The above-mentioned polyester polyurethane is composed of a system as it is (solid at room temperature) or dissolved in an appropriate solvent (methyl ethyl ketone, acetone, toluene, ethyl acetate, trichloroethane). If necessary, a conventional urethane crosslinking catalyst, dye / pigment, plastic An agent, a blocked polyisocyanate compound and the like may be added.
本発明に係る真空成形接着方法は、ポリオレフィン発
泡体表皮材に上述の接着プライマーと接着剤を予じめ塗
布せしめ、これを各種の基材層（たとえばABS板、ノリ
ル板、ASG板、ポリカーボネート板、木質複合ボード）
に対し、加熱をしながら、真空成形接着を行い、基材層
の成形と同時に基材層に表皮材を接着させる方法であ
り、具体的には、以下の手順で実施することができる。In the vacuum forming bonding method according to the present invention, the above-mentioned adhesive primer and adhesive are preliminarily applied to a polyolefin foam skin material, and this is applied to various base material layers (for example, an ABS plate, a noril plate, an ASG plate, a polycarbonate plate). , Wood composite board)
In this method, a vacuum molding adhesion is performed while heating, and a skin material is adhered to the base material layer simultaneously with the formation of the base material layer. Specifically, the method can be performed by the following procedure.
ｉ）先ず、上記表皮材に上述の接着プライマーを通常５
〜50μ厚で塗布し、乾燥させる。i) First, the above-mentioned adhesive primer is usually added to the above-mentioned skin material for 5 times.
Apply at ~ 50μ thickness and dry.
ii）次に該プライマー塗布面に、上述の接着剤を溶液状
態でまたは熱溶融状態で、通常乾燥膜厚10〜400μにて
塗布する。溶液状態の場合は、塗布後乾燥する。また熱
溶融ラミネーションは、溶融加熱しながらノズル孔より
押出し、常温放置によりラミネートすることができる。ii) Next, the above-mentioned adhesive is applied to the primer-coated surface in a solution state or a hot-melt state, usually with a dry film thickness of 10 to 400 μm. In the case of a solution state, it is dried after application. The hot-melt lamination can be extruded from a nozzle hole while being melted and heated, and can be laminated at room temperature.
iii）このようにして予じめ得られたポリオレフィン発
泡体表示材を基材層との加熱下の、真空成形接着に供す
る。かかるプライマーと接着剤の乾燥皮膜を有する表皮
材は80〜180℃の温度に加熱しながら、基材層に重ね合
せ、通常の条件（たとえば加熱温度170℃付近、真空度1
0mmHg、成形時間５〜20秒）で真空成形を行い、成形と
接着を同時に行う。iii) The polyolefin foam display material thus obtained is subjected to vacuum forming adhesion with a base material layer while heating. The skin material having the dried film of the primer and the adhesive is superposed on the base material layer while being heated to a temperature of 80 to 180 ° C., and is subjected to a normal condition (for example, a heating temperature of about 170 ° C., a degree of vacuum of 1).
Vacuum forming is performed at 0 mmHg for a forming time of 5 to 20 seconds, and forming and bonding are performed simultaneously.
発明の効果 本発明の真空成形接着方法は、ポリオレフィン発泡体
表皮材にプライマーと接着剤を予じめ塗布、乾燥したプ
レコート型であるため、しかも熱溶融ラミネーションが
可能であるため、成形ラインで接着剤塗布に伴う溶剤揮
散がなく、環境汚染の防止および接着剤の混合、塗布、
乾燥工程を別工程で実施できるので、成形接着工程の合
理化を図ることができ、さらに上記接着プライマーとの
組合せにより、従来の真空成形条件で十分な接着力を発
揮でき、かつ自動車内装用途に要求される耐熱性を満足
させることができる。Effect of the Invention The vacuum forming and bonding method of the present invention is a pre-coated type in which a primer and an adhesive are preliminarily applied to a polyolefin foam skin material and dried, and since hot-melt lamination is possible, bonding is performed at a forming line. No solvent volatilization caused by application of adhesive, prevention of environmental pollution and mixing and application of adhesive
Since the drying process can be performed in a separate process, the molding and bonding process can be rationalized, and in combination with the above-mentioned bonding primer, sufficient bonding force can be exhibited under the conventional vacuum forming conditions and required for automotive interior applications. Required heat resistance can be satisfied.
次に実施例を挙げて、本発明をより具体的に説明す
る。なお、「部」とあるは「重量部」を意味する。Next, the present invention will be described more specifically with reference to examples. Here, “parts” means “parts by weight”.
実施例１ （１）接着プライマーの調製 水添ポリブタジエングリコール（三菱化成工業（株）
製、ポリテールＨ）100部とMDI（40部）をトルエン2660
部中、ジブチルチンジラウリレート0.1部の存在下、50
℃で24時間撹拌反応させて接着プライマーを得る。な
お、反応物のウレタンプレポリマーの活性NCO含有量は
0.5重量％である。Example 1 (1) Preparation of adhesion primer Hydrogenated polybutadiene glycol (Mitsubishi Kasei Kogyo Co., Ltd.)
100 parts of Polytail H) and MDI (40 parts) in toluene 2660
Parts, in the presence of 0.1 part of dibutyltin dilaurate, 50 parts
Stir at 24 ° C. for 24 hours to obtain an adhesion primer. The active NCO content of the urethane prepolymer of the reactant is
0.5% by weight.
（２）接着剤の調製 ポリエステルポリウレタン（バイエル（株）製、デス
モコール＃500、分子量15万）100部をメチルエチルケト
ン400部に加え、室温で16時間撹拌溶解させて、接着剤
溶液を得る。(2) Preparation of Adhesive 100 parts of polyester polyurethane (manufactured by Bayer K.K., Desmocol # 500, molecular weight: 150,000) is added to 400 parts of methyl ethyl ketone, and stirred and dissolved at room temperature for 16 hours to obtain an adhesive solution.
（３）真空成形接着と接着評価 ポリオレフィン発泡体表皮材（東レ（株）製、PPAM、
厚み3mm）に、上記（１）の接着プライマーを30μ厚で
塗布し、80℃で２分間乾燥させた後、該プライマー塗布
面に上記（２）の接着剤溶液を200μ厚で塗布し、80℃
で２分間乾燥させて、接着剤塗布表皮材を得る。(3) Vacuum molding adhesion and adhesion evaluation Polyolefin foam skin material (Toray Co., Ltd., PPAM,
(3 mm thick), apply the adhesive primer of (1) above in a thickness of 30 μm and dry at 80 ° C. for 2 minutes. Then, apply the adhesive solution of the above (2) in a thickness of 200 μm on the primer coated surface, ° C
For 2 minutes to obtain an adhesive-coated skin material.
次に、かかる接着材塗布表皮材を７日間室温放置後、
140℃で４時間加熱した直後に、市販のABS板（厚み2m
m）へ0.6kg/cm2×20秒間圧締して積層体を得る。この積
層体の初期剥離強度、常態剥離強度および耐熱クリープ
の測定結果は、以下の通りである。Next, after leaving the adhesive coated skin material at room temperature for 7 days,
Immediately after heating at 140 ° C for 4 hours, a commercially available ABS plate (2 m thick)
Press m) to 0.6 kg / cm 2 × 20 seconds to obtain a laminate. The measurement results of the initial peel strength, the normal peel strength, and the heat creep of the laminate are as follows.
結果 初期剥離強度 :2.1kg/25mmMB 常態剥離強度 :2.1kg/25mmMB 耐熱クリープ :0mm 注）貼合せ10分後 ）20℃×24時間後 ）20℃×24時間後、80℃雰囲気中100g/25mmの荷重
を90゜角方向に加え、24時間後の剥離長さを測定 ）表皮材の材破Result Initial peel strength : 2.1kg / 25mmMB Normal peel strength : 2.1kg / 25mmMB Heat creep : 0mm Note) After 10 minutes of bonding) After 20 ° C x 24 hours) After 20 ° C x 24 hours, load of 100g / 25mm in 80 ° C atmosphere
90 ° square direction and measure the peeling length after 24 hours.)
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０９Ｊ 5/02 Ｃ０９Ｊ 5/02 // Ｂ２９Ｋ 23:00 105:04 (56)参考文献 特開 平３−87244（ＪＰ，Ａ) 特開 平１−132674（ＪＰ，Ａ) 特開 昭62−95326（ＪＰ，Ａ) 特開 平３−239780（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B29C 51/00 - 51/46 B29C 65/48 - 65/54 B29C 65/70,65/72 C08J 5/12 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification symbol FI C09J 5/02 C09J 5/02 // B29K 23:00 105: 04 (56) References JP-A-3-87244 (JP, A JP-A-1-132674 (JP, A) JP-A-62-95326 (JP, A) JP-A-3-239780 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) B29C 51/00-51/46 B29C 65/48-65/54 B29C 65 / 70,65 / 72 C08J 5/12
Claims (1)
ブタジエングリコールと過剰量のポリイソシアネート化
合物の反応によって得られる活性イソシアネート基含有
ウレタンプレポリマーを成分とする接着プライマーを塗
布、乾燥し、次いで 該接着プライマー塗布面に、ヘキサングリコールとアジ
ピン酸を主原料とするポリエステルポリオールを主成分
として含む分子量５万〜30万のポリエステルポリウレタ
ンから成る接着剤を溶液状態で塗布、乾燥または熱溶融
状態で塗布した後、かかる接着剤を予じめ塗布した表皮
材を基材層に重ね合せて真空成形と同時に接着すること
を特徴とする真空成形接着方法。An adhesive primer comprising a urethane prepolymer containing an active isocyanate group obtained by reacting hydrogenated polybutadiene glycol with an excess amount of a polyisocyanate compound is applied to a polyolefin foam skin material, dried, and then dried. After applying an adhesive composed of a polyester polyurethane having a molecular weight of 50,000 to 300,000 and containing a polyester polyol containing hexane glycol and adipic acid as main components in a solution state, drying or hot-melting on the primer application surface, A vacuum forming bonding method characterized in that a skin material coated with such an adhesive in advance is superimposed on a base material layer and bonded simultaneously with vacuum forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2230887A JP2923010B2 (en) | 1990-08-30 | 1990-08-30 | Vacuum forming bonding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2230887A JP2923010B2 (en) | 1990-08-30 | 1990-08-30 | Vacuum forming bonding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04110135A JPH04110135A (en) | 1992-04-10 |
| JP2923010B2 true JP2923010B2 (en) | 1999-07-26 |
Family
ID=16914864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2230887A Expired - Fee Related JP2923010B2 (en) | 1990-08-30 | 1990-08-30 | Vacuum forming bonding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2923010B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4019554B2 (en) | 1998-08-03 | 2007-12-12 | トヨタ自動車株式会社 | Method for producing multiple uneven plate for fuel cell separator |
-
1990
- 1990-08-30 JP JP2230887A patent/JP2923010B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04110135A (en) | 1992-04-10 |
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