JPH03138140A - Soundproof and vibration-proof plate made of aluminum - Google Patents
Soundproof and vibration-proof plate made of aluminumInfo
- Publication number
- JPH03138140A JPH03138140A JP27794189A JP27794189A JPH03138140A JP H03138140 A JPH03138140 A JP H03138140A JP 27794189 A JP27794189 A JP 27794189A JP 27794189 A JP27794189 A JP 27794189A JP H03138140 A JPH03138140 A JP H03138140A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- thickness
- strength
- plate
- corrosion resistance
- 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.)
- Pending
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 55
- 239000000463 material Substances 0.000 claims abstract description 50
- 238000013016 damping Methods 0.000 claims abstract description 26
- 230000007797 corrosion Effects 0.000 claims abstract description 21
- 238000005260 corrosion Methods 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 9
- 239000000956 alloy Substances 0.000 claims abstract description 6
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 3
- 230000000052 comparative effect Effects 0.000 description 6
- 239000004698 Polyethylene Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000002952 polymeric resin Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Abstract
Description
（産業上の利用分野）
本発明はアルミニウム製の防音、防振板に係り、屋根な
どの建築材、自動車などの車輌用外板及び内装材、エン
ジン周辺部材、電気製品部材などで防音、防振、耐食性
及び強度を必要とされる材料に適するアルミニウム製防
音、防振板に関する。
（従来の技術とその課題）・
近年、防音、防振を目的とした制振鋼板が電気洗濯機の
外板、自動車のオイルパン、屋根材などに使用されるよ
うになってきたが、一方では、１１板よりも１／３も軽
量で且つ耐食性に優れているアルミニウム材を使用した
アルミニウム製の制振材も自動車用材料として一部使用
され始めている。
後者のアルミニウム製制振材としては、従来、は、Ａｌ
１００．Ａ３０５２Ｐ、Ａ３１８２Ｐ、Ａ１０５０Ｐな
どを用途に応じて選択し、同一の材質及び厚さからなる
外板及び内板の間に樹脂層を介在させた構造の積層体が
製作されている。通常、外板及び内板の板厚は０．３〜
２．０ｍｍであり、樹脂層としては厚さ数１０μｍの薄
い粘弾性高分子樹脂、例えばポリエチレンをベースにし
た重合体などの熱可塑性樹脂が用いられている。
ところで、アルミニウム製制振材に対する要求特性は様
々であり、基本的には、■制振性、防音性、■強度、■
耐食性、耐久性、■加工性、■軽量性、■コストなどに
区分されるが、最近では、用途毎に重点がやや異なる状
況にある。
例えば、自動車用外板としては、重点特性として強度が
要求されるので、従来よりＭｇを５％程度含有している
５０００系のアルミニウム合金板が使用されているが、
耐食性及び耐応力腐食割れ性が悪いうえに、プレス加工
時にストレッチャーストレインマークが出やくなると共
に塗装後のベーキング強度が低下するという問題がある
。
また、屋根材では、耐食性を重視して３０００系のアル
ミニウム板が使用しているが、強度が不足するという問
題がある。
このように、従来のアルミニウム製制振材は、基本的に
は制振性を最重点特性とし、耐食性及び強度は中程度と
する設計で、３００ｏ系、５０００系のアルミニウム合
金が主として用６’ｔられてｂ）るが、このような設計
のアルミニウム製制振材では、各種用途に応じた要求品
質に十分対応することが困難であった。
本発明は、力いる事情に鑑みてなされたものであって、
用途に応じた要求特性に適宜対応できるアルミニウム製
防音、制振材を提供することを目的とするものである。
（課題を解決するための手段）
本発明者は、用途に応じた多様な要求特性に対応できる
材料構成について鋭意研究を重ねた。
まず、従来のように、防音、制振性に最も優れることを
優先して同一板厚からなる構成を必須とし、更に用途に
応じて外板及び内板の材質を選択するのでは、加工性、
強度又は経済性などを共に向上させることが困難である
ことから、外板と内板との材質及び板厚を変化させるこ
とを試みた。
その結果、外板と内板の材質及び板厚を適切に組合せる
ことにより、用途に応じた防音、制振性を確保しつつ、
様々な要求特性に対応できることを見い出し、ここに本
発明をなしたものである。
すなわち、本発明は、２枚のアルミニウム板の間に樹脂
層を有するアルミニウム製積層板であって、一方のアル
ミニウム板を耐食性の優れる純アルミニウム系の材料で
構成すると共に、他方のアルミニウム板を強度の優れる
高力系アルミニウム合金材料で構成し、更に樹脂層を制
振特性の優れる熱可塑性粘弾性樹脂で構成し、かつ、前
記一方の純アルミニウム系の板厚１に対して、他方の高
力系アルミニウム合金板の板厚を１〜１０にすることを
特徴とするアルミニウム製防音、防振板を要旨とするも
のである。
以下に本発明を更に詳細に説明する。
（作用）
本発明に係るアルミニウム製制振材は、従来と同様、第
１図に示すように２枚のアルミニウム板１．２の間に樹
脂層３を介在させた断面構造を有するが、基本的には、
用途によって防音、制振性が最重点特性ではないことを
考慮し、耐食性と強度を兼ね備えたものである。
防音、制振性が最重点特性である場合には外板及び内板
の板厚を同−乃至略同一とするが、他の場合には異なる
板厚とし、更に材料組合せに関しては、耐食性を要求さ
れる表側には１０００系の純アルミニウム板を用い、裏
側には２０００系、５００ｏ系、６ｏ００系、７０００
系などの高力系アルミニウム合金板を使用する。これに
より、所望の特性に応えることができるのみならず、全
板厚の薄肉化も可能になり、アルミニウム板としての軽
量化の特徴を一層発揮することができる。
具体的には、要求特性に対する本発明による材料組合せ
例を第１表に示す。(Industrial Application Field) The present invention relates to soundproofing and vibrationproofing plates made of aluminum, and is used for soundproofing and vibrationproofing in construction materials such as roofs, exterior and interior materials for vehicles such as automobiles, engine peripheral parts, electrical product parts, etc. This invention relates to aluminum soundproofing and vibrationproofing plates suitable for materials that require vibration, corrosion resistance, and strength. (Conventional technology and its issues) - In recent years, damping steel plates for the purpose of soundproofing and vibrationproofing have come to be used for the outer panels of electric washing machines, oil pans of automobiles, roofing materials, etc. Aluminum damping materials, which are 1/3 lighter than No. 11 plates and have excellent corrosion resistance, have also begun to be used as materials for automobiles. As the latter aluminum damping material, conventionally, Al
100. A3052P, A3182P, A1050P, etc. are selected depending on the application, and a laminate having a structure in which a resin layer is interposed between an outer plate and an inner plate made of the same material and thickness is manufactured. Normally, the thickness of the outer and inner panels is 0.3~
2.0 mm, and the resin layer is made of a thin viscoelastic polymer resin with a thickness of several tens of micrometers, such as a thermoplastic resin such as a polyethylene-based polymer. By the way, there are various characteristics required for aluminum vibration damping materials, and basically they are: ■ vibration damping properties, soundproofing properties, ■ strength, ■
It is classified into corrosion resistance, durability, ■processability, ■lightness, ■cost, etc., but recently the emphasis has been slightly different depending on the application. For example, since strength is required as an important characteristic for automobile outer panels, 5000 series aluminum alloy plates containing about 5% Mg have traditionally been used.
In addition to poor corrosion resistance and stress corrosion cracking resistance, there are problems in that stretcher strain marks are likely to appear during press working and baking strength after painting is reduced. Furthermore, for roofing materials, 3000 series aluminum plates are used with emphasis on corrosion resistance, but there is a problem that they lack strength. In this way, conventional aluminum vibration damping materials are basically designed with damping properties as the most important characteristic, and corrosion resistance and strength are moderate, and 300o series and 5000 series aluminum alloys are mainly used. However, with aluminum damping materials designed in this way, it has been difficult to sufficiently meet the quality requirements for various uses. The present invention was made in view of the pressing circumstances, and
The purpose of this invention is to provide an aluminum soundproofing and vibration damping material that can suitably meet the required characteristics depending on the application. (Means for Solving the Problems) The present inventor has conducted extensive research into material configurations that can meet various required characteristics depending on the application. First, as in the past, it is essential to prioritize the best soundproofing and vibration damping properties, and the structure is made up of the same thickness, and the materials for the outer and inner panels are selected depending on the application. ,
Since it is difficult to improve both strength and economic efficiency, we attempted to change the material and thickness of the outer and inner panels. As a result, by appropriately combining the materials and thicknesses of the outer and inner panels, we are able to ensure soundproofing and vibration damping properties suited to the application.
The present invention has been made based on the discovery that it can meet various required characteristics. That is, the present invention is an aluminum laminate having a resin layer between two aluminum plates, in which one aluminum plate is made of a pure aluminum material with excellent corrosion resistance, and the other aluminum plate is made of a pure aluminum material with excellent strength. It is made of a high-strength aluminum alloy material, and the resin layer is made of a thermoplastic viscoelastic resin with excellent vibration damping properties, and the thickness of the one pure aluminum material is 1, while the other high-strength aluminum The gist of this invention is an aluminum soundproofing and vibrationproofing plate characterized by having an alloy plate having a thickness of 1 to 10 mm. The present invention will be explained in more detail below. (Function) The aluminum vibration damping material according to the present invention has a cross-sectional structure in which a resin layer 3 is interposed between two aluminum plates 1.2 as shown in FIG. Specifically,
Considering that soundproofing and vibration damping properties are not the most important characteristics depending on the application, it is designed to have both corrosion resistance and strength. When sound insulation and vibration damping properties are the most important characteristics, the thickness of the outer and inner panels should be the same or almost the same, but in other cases, the thicknesses should be different, and in addition, regarding material combinations, corrosion resistance should be selected. 1000 series pure aluminum plate is used for the required front side, and 2000 series, 500o series, 6o00 series, 7000 series is used for the back side.
Use high-strength aluminum alloy plates such as This not only makes it possible to meet the desired characteristics, but also makes it possible to reduce the total thickness of the plate, thereby further demonstrating the lightweight feature of an aluminum plate. Specifically, Table 1 shows examples of material combinations according to the present invention that meet the required characteristics.
同表よりわかるように、例えば、自動車用外板の場合に
は、耐食性の優れる１０００系の純アルミニウム板とベ
ーク強度を上げるためにＣｕを添加した５０００系のア
ルミニウム板の組み合せとすることにより、強度と耐食
性を共に満足でき、しかもプレス加工性についても、成
形性の優れた１０００系の純アルミニウム板を外板とす
るので問題はない。この場合、板厚の比は、０．２ ：
０゜８が望ましい。
また、屋根板では、１０００系の耐食性の優れた純アル
ミニウム板と５０００系の高力系合金のアルミニウム板
との組み合せにより、耐食性及び強度の両面で優れた特
徴を発揮できる。従来、この種の用途ではクラッド圧延
でしか実現できなかったアルミニウム板のみの組み合せ
に対し、制振性及び防音性という新規な機能を付加した
アルミニウム制振材を経済的に提供できる。
他の用途に対しても、同表に示す材料組合せによって要
求特性に応えることができる。
なお、純アルミニウム系材料としては、耐食性の優れた
１００ｏ系のものから選択すればよい。
高力アルミニウム合金系の材料としては、強度の優れる
２００ｏ系、５０００系、６０００系。
７０００系などから選択すればよい。この場合、上述の
自動車外板の例で示したように、ベーク後強度を確保す
る場合には、Ｃｕを１％程度添加した５０００系のもの
を選択する。このように本発明における材料選択は種々
の成分組成のものが対象となり、ＪＩＳに規定される成
分組成を含むことは勿論のこと、他の成分組成も含むも
のである。
また、樹脂層としては、従来と同様でよく、厚さ数１０
μｍ程度で、粘弾性高分子樹脂（例、ポリエチレンベー
スの重合体）などの熱可塑性樹脂を用いる。
制振性に影響を及ぼす板厚比に関しては、１０００系の
純アルミニウム板と高力系アルミニウム板との板厚比を
変えて制振性について実験を行った結果を第２図に示す
ように、純アルミニウム系板厚：高力系アルミニウム板
厚の比が１：１の場合に最も制振性に優れるが、１：１
０よりも純アルミニウム系板厚が小さくなると、極端に
制振性が劣化することがわかる。・したがって、本発明
においては、純アルミニウム系板厚：高力系アルミニウ
ム板厚の比は１：１〜１：１０の範囲とするのが好まし
い。
次に本発明の実施例を示す。
（実施例）
第２表に示す材質及び板厚の組合せにて自動車用外板を
製作した。
比較材Ｎａ １はＡｌ２−４．５％Ｍｇ−０，４％Ｃｕ
組成の５０３０相当材（弊社呼称）の単板からなる材料
である。
比較材Ｎａ ２はＡＱ−４，５％Ｍｇ−０，４％Ｃｕ組
成の５０３０相当材（弊社呼称）からなる２枚（板厚０
、８ ｌｌ１ｍと０ 、４ ｍｍ）の間にポリエチレ
ンベースの重合体（厚さ７０μＩｎ）を介在させた構造
のものである。
本発明材Ｎα３は、板厚０．２ｎ＋ｍの純アルミニウム
材（１０５０）と、板厚０ 、８ ｍｍのＡＱ−４，５
％Ｍｇ−１，０％Ｃｕ組成の５０３０相当材（弊社呼称
）との間にポリエチレンベースの重合体（厚さ７０μｍ
）を介在させた構造のものである。
なお、比較材Ｎα２と本発明材Ｎα３は、第１図に示す
構成を有している。
また、それぞれの板厚は５耐プント性を考慮しで決定し
た。耐プント性は、δ＝ｆ（σ。、２・ｔ ！ ）（但
し、σ。、２は耐力、ｔは板厚を表わす）で定義される
が、２枚のアルミ板を用いた場合、ｔｚ（ｔｔ＋ｔｚ）
にはならず、比較材Ｎα２の場合にはｔ、＝０．８ｍｍ
、ｔ、＝０．４ｍｍとする必要がある。
一方、本発明材Ｎα３の場合、比較材Ｎα２と同じ耐プ
ント性を確保するためには、ｔ、（１０５０材）＝０．
２ｍｍ、ｔｚ（５０３０相当材）＝０．８ｍｍとする組
合せにて対応できる。これは、５ｏ３０相当材としてＣ
ｕを１．０％添加することによって、ベーク後耐力を１
３ ｋｇｆ ／ ｍｍ” −４２０ｋｇｆ ／ ｍｕ”
に高めることができるためである。
これらの評価結果を第２表に示す。
なお、特性の評価に関しては、制振性は損失係数の測定
により、強度は耐プント性により、それぞれ評価した。
第２表より、比較材Ｎａ ２は、自動車外板用として強
度を主たる特性として製作されたものであり、耐食性や
加工性が充分ではない。
一方、本発明材Ｎα３は、耐食性と加工性が優れており
、しかも必要な強度が確保されており、更には比較材Ｈ
ａ ２に比べ、合計板厚が約２０％減少し、軽量化がで
き、低コストである。
［以下余白］
（発明の効果）
以上詳述したように、本発明によれば、優れた耐食性及
び加工性を備え、必要な強度も有するアルミニウム製防
音、制振板を提供できるので、屋根などの建築材、自動
車用の外板及び内装材５電気製品部材等々の広い用途に
応じた要求特性に充分対応できる。As can be seen from the table, for example, in the case of automobile exterior panels, by combining a 1000 series pure aluminum plate with excellent corrosion resistance and a 5000 series aluminum plate added with Cu to increase baking strength, Since the outer plate is made of a 1000 series pure aluminum plate that satisfies both strength and corrosion resistance and has excellent press workability, there is no problem. In this case, the ratio of plate thickness is 0.2:
0°8 is desirable. Furthermore, in roof panels, the combination of 1000-series pure aluminum plates with excellent corrosion resistance and 5000-series high-strength alloy aluminum plates can exhibit excellent characteristics in both corrosion resistance and strength. Conventionally, for this type of application, it is possible to economically provide an aluminum vibration damping material that has novel functions of vibration damping and soundproofing, compared to a combination of only aluminum plates that could only be realized by clad rolling. For other uses as well, the required characteristics can be met by the material combinations shown in the same table. Note that the pure aluminum-based material may be selected from 100o-based materials that have excellent corrosion resistance. High-strength aluminum alloy materials include 200o series, 5000 series, and 6000 series, which have excellent strength. You can choose from 7000 series, etc. In this case, as shown in the above-mentioned example of an automobile outer panel, in order to ensure strength after baking, a 5000 series material containing approximately 1% Cu is selected. As described above, the selection of materials in the present invention targets materials with various component compositions, and includes not only component compositions specified by JIS but also other component compositions. In addition, the resin layer may be the same as the conventional one, and has a thickness of several tens of
micrometer, and a thermoplastic resin such as a viscoelastic polymer resin (eg, a polyethylene-based polymer) is used. Regarding the plate thickness ratio that affects vibration damping performance, we conducted experiments on vibration damping properties by changing the plate thickness ratio of 1000 series pure aluminum plate and high strength aluminum plate, and the results are shown in Figure 2. , when the ratio of pure aluminum plate thickness to high strength aluminum plate thickness is 1:1, the vibration damping properties are the best, but 1:1
It can be seen that when the thickness of the pure aluminum plate becomes smaller than 0, the damping performance deteriorates extremely. - Therefore, in the present invention, the ratio of pure aluminum plate thickness to high strength aluminum plate thickness is preferably in the range of 1:1 to 1:10. Next, examples of the present invention will be shown. (Example) Automotive outer panels were manufactured using the combinations of materials and thicknesses shown in Table 2. Comparative material Na 1 is Al2-4.5%Mg-0.4%Cu
This material is made of a veneer of a material with a composition equivalent to 5030 (our company's name). The comparison material Na 2 is two sheets (thickness: 0
, 8 ll1m and 0.4 mm), a polyethylene-based polymer (thickness 70 μIn) is interposed between the two. The present invention material Nα3 is made of pure aluminum material (1050) with a plate thickness of 0.2n+m and AQ-4,5 with a plate thickness of 0.8 mm.
A polyethylene-based polymer (thickness 70 μm
). Note that the comparative material Nα2 and the present invention material Nα3 have the configurations shown in FIG. In addition, the thickness of each plate was determined taking into consideration the 5 Punt resistance. Punt resistance is defined as δ=f(σ., 2・t!) (where σ., 2 represents proof stress and t represents plate thickness), but when two aluminum plates are used, tz (tt+tz)
In the case of comparative material Nα2, t = 0.8 mm.
,t,=0.4mm. On the other hand, in the case of the present invention material Nα3, in order to ensure the same Punt resistance as the comparative material Nα2, t, (1050 material) = 0.
A combination of 2 mm and tz (5030 equivalent material) = 0.8 mm can be used. This is C as a 5o30 equivalent material.
By adding 1.0% of u, the proof stress after baking was increased to 1.
3 kgf/mm"-420kgf/mu"
This is because it can be increased to These evaluation results are shown in Table 2. Regarding the evaluation of characteristics, vibration damping property was evaluated by measuring loss coefficient, and strength was evaluated by Punt resistance. From Table 2, the comparative material Na 2 was manufactured with strength as its main characteristic for use in automobile exterior panels, and its corrosion resistance and workability were insufficient. On the other hand, the present invention material Nα3 has excellent corrosion resistance and workability, and also has the necessary strength, and also has the comparative material H
Compared to A2, the total plate thickness is reduced by about 20%, making it lighter and cheaper. [Blank below] (Effects of the Invention) As detailed above, according to the present invention, it is possible to provide an aluminum soundproofing and vibration damping plate that has excellent corrosion resistance and workability, and also has the necessary strength, so it can be used for roofs, etc. It can fully meet the required characteristics for a wide range of applications, such as building materials, automobile exterior panels, interior materials, and electrical product components.
第１図はアルミニウム製防音、制振板の断面構造を示す
図、
第２図は板厚比と損失係数との関係を示す図である。
１．２・・・アルミニウム板、３・・・樹脂層。Figure 1 is a diagram showing the cross-sectional structure of an aluminum soundproofing and damping plate, and Figure 2 is a diagram showing the relationship between plate thickness ratio and loss coefficient. 1.2... Aluminum plate, 3... Resin layer.
Claims (1)
ム製積層板であって、一方のアルミニウム板を耐食性の
優れる純アルミニウム系の材料で構成すると共に、他方
のアルミニウム板を強度の優れる高力系アルミニウム合
金材料で構成し、更に樹脂層を制振特性の優れる熱可塑
性粘弾性樹脂で構成し、かつ、前記一方の純アルミニウ
ム系の板厚１に対して、他方の高力系アルミニウム合金
板の板厚を１〜１０にすることを特徴とするアルミニウ
ム製防音、防振板。An aluminum laminate having a resin layer between two aluminum plates, one of which is made of a pure aluminum material with excellent corrosion resistance, and the other aluminum plate is made of a high-strength aluminum alloy material with excellent strength. The resin layer is made of a thermoplastic viscoelastic resin with excellent vibration damping properties, and the thickness of the other high-strength aluminum alloy plate is set to 1 for the pure aluminum plate. An aluminum soundproofing and vibrationproofing plate characterized by a rating of 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27794189A JPH03138140A (en) | 1989-10-25 | 1989-10-25 | Soundproof and vibration-proof plate made of aluminum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27794189A JPH03138140A (en) | 1989-10-25 | 1989-10-25 | Soundproof and vibration-proof plate made of aluminum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03138140A true JPH03138140A (en) | 1991-06-12 |
Family
ID=17590415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27794189A Pending JPH03138140A (en) | 1989-10-25 | 1989-10-25 | Soundproof and vibration-proof plate made of aluminum |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03138140A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0692371A1 (en) * | 1994-07-13 | 1996-01-17 | Alusuisse-Lonza Services AG | Deformable composite panel |
-
1989
- 1989-10-25 JP JP27794189A patent/JPH03138140A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0692371A1 (en) * | 1994-07-13 | 1996-01-17 | Alusuisse-Lonza Services AG | Deformable composite panel |
| CH687815A5 (en) * | 1994-07-13 | 1997-02-28 | Alusuisse Lonza Services Ag | Formable composite panel. |
| EP0692371B1 (en) * | 1994-07-13 | 2001-03-28 | Alusuisse Technology & Management AG | Deformable composite panel |
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