JPH031966B2 - - Google Patents

Info

Publication number
JPH031966B2
JPH031966B2 JP60210879A JP21087985A JPH031966B2 JP H031966 B2 JPH031966 B2 JP H031966B2 JP 60210879 A JP60210879 A JP 60210879A JP 21087985 A JP21087985 A JP 21087985A JP H031966 B2 JPH031966 B2 JP H031966B2
Authority
JP
Japan
Prior art keywords
foam
carpet
base
layer
carpet tile
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 - Lifetime
Application number
JP60210879A
Other languages
English (en)
Other versions
JPS61179113A (ja
Inventor
Benjamin Higinzu Kenesu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Milliken Research Corp
Original Assignee
Milliken Research Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Milliken Research Corp filed Critical Milliken Research Corp
Publication of JPS61179113A publication Critical patent/JPS61179113A/ja
Publication of JPH031966B2 publication Critical patent/JPH031966B2/ja
Granted legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
    • D06N7/0063—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf
    • D06N7/0071—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf characterised by their backing, e.g. pre-coat, back coating, secondary backing, cushion backing
    • D06N7/0081—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf characterised by their backing, e.g. pre-coat, back coating, secondary backing, cushion backing with at least one extra fibrous layer at the backing, e.g. stabilizing fibrous layer, fibrous secondary backing
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
    • D06N7/0063—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf
    • D06N7/0071—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf characterised by their backing, e.g. pre-coat, back coating, secondary backing, cushion backing
    • D06N7/0073—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf characterised by their backing, e.g. pre-coat, back coating, secondary backing, cushion backing the back coating or pre-coat being applied as an aqueous dispersion or latex
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
    • D06N7/0063—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf
    • D06N7/0071—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf characterised by their backing, e.g. pre-coat, back coating, secondary backing, cushion backing
    • D06N7/0086—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf characterised by their backing, e.g. pre-coat, back coating, secondary backing, cushion backing characterised by the cushion backing, e.g. foamed polyurethane
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/02—Synthetic macromolecular fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/02—Synthetic macromolecular fibres
    • D06N2201/0263—Polyamide fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/08—Inorganic fibres
    • D06N2201/082—Glass fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2203/00—Macromolecular materials of the coating layers
    • D06N2203/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N2203/042—Polyolefin (co)polymers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2203/00—Macromolecular materials of the coating layers
    • D06N2203/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N2203/045—Vinyl (co)polymers
    • D06N2203/048—Polyvinylchloride (co)polymers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2203/00—Macromolecular materials of the coating layers
    • D06N2203/06—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N2203/061—Polyesters
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2203/00—Macromolecular materials of the coating layers
    • D06N2203/06—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N2203/068—Polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2205/00—Condition, form or state of the materials
    • D06N2205/04—Foam
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/02—Properties of the materials having acoustical properties
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/16—Properties of the materials having other properties
    • D06N2209/1628—Dimensional stability
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23907—Pile or nap type surface or component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23907—Pile or nap type surface or component
    • Y10T428/23979—Particular backing structure or composition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23907—Pile or nap type surface or component
    • Y10T428/23993—Composition of pile or adhesive

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Carpets (AREA)
  • Floor Finish (AREA)
  • Laminated Bodies (AREA)

Description

【発明の詳細な説明】 ［産業上の利用分野］ この発明はその上方に房を備え、かつその上を
歩く人々に快適さを与えるカーペツトタイルに関
する。このカーペツトタイルは、特に長期間の使
用により快適さと防音効果とを必要とする商業区
域に使用される。
［発明の目的］ この発明は、それを設置された場所を歩く人々
に対して快適さを増すと共に、疲労を減少させる
ことのできるカーペツトタイルを提供することに
ある。
［実施例］ 以下、この発明の一実施例を図面に基づいて説
明する。
第１図には、上面に房が設けられた新しいカー
ペツトタイル１０が示されている。このカーペツ
トタイル１０はカーペツトベース１２と発泡ベー
ス層１４とを備えている。カーペツトベース１２
は発泡ベース層１４に粘着層１６により重ねら
れ、粘着層１６が単一構造物として凝固された
時、カーペツトタイル１０の厚さを安定させるよ
うに、この粘着層１６内にはガラス製のスクリム
１８が埋設されている。
カーペツトベース１２は厚さ3.1〜25.4mmの環
状パイル層２０を備え、このパイル層２０は織ポ
リエステルの裏張２２にナイロン製の連続したフ
アイバの房を付けることにより形成されている。
このように、環状パイル層２０はナイロンで形成
されているが、ナイロンの代わりにポリエステ
ル、ポリプロピレン、アクリル又はこれらの混合
物等の他の適切な合成の糸を使用することができ
る。裏張２２は織り込まれているが、織り込まず
かつナイロン、フアイバーグラス又はポリプロピ
レン等の他の合成材料により形成することができ
る。ラテツクス層２４はスチレンブタジエンで形
成されているが、ウレタン、ポリビニルクロライ
ド（PCV）、アクリル等の他の適切な材料により
形成してもよい。
粘着層１６は、ポリオレフイン、変性ポリオレ
フイン、ポリアミド又は他の適切な熱可塑性部材
で形成された0.25〜1.78mmの厚さの層であり、こ
れらの部材の重さは337.5〜2362ｇ／m2であり、
好ましくは1687.5ｇ／m2である。埋設された安定
部材はガラス製のスクリムであるが、ガラス又は
ポリエステル、ナイロン、ポリプロピレン等の他
の適切な部材の織布又は不織布でもよい。
発泡ベース層１４は、その厚さが略3.97mmであ
り、下面に堅い表面３０を具備する高密度（発泡
率が低い）のウレタンフオーム２８の覆つている
ポリプロピレンで織布された繊維状の厚さ0.51mm
の支持裏張２６を有する。この支持裏張２６は、
前記粘着層１６を支持する。
支持裏張２６は織布又は不織布でもよく、さら
にナイロン、ポリエステル、フアイバーグラス等
の他の部材で形成することもできる。この支持裏
張２６の厚さは、0.25〜1.02mmの範囲で変えるこ
とができる。
ウレタンフオーム２８の厚さは0.25〜2.54mmの
範囲で変えることができ、かつウレタンフオーム
２８は高密度のウレタンであるが、スチレンブタ
ジエンラテツクス又はポリビニルクロライド等の
同等物を使用することができる。このウレタンフ
オーム２８の重さは337.5〜2022ｇ／m2の範囲で
変えることができ、かつ略1282.5ｇ／m2が好まし
い。このように、高密度のウレタンを用いること
によつて、カーペツトタイルの端部の曲りや反り
を防止することができる。
第２図には、第１図の実施例と比較して発泡ベ
ース層１４と粘着層１６とスクリム１８とが等し
く、カーペツトベースが異なる他の実施例が示さ
れている。このカーペツトベース３２には、ポリ
ビニルクロライド又は溶融性の粘着物３６にナイ
ロン又は他の適切な部材のカツトパイルの糸３４
が植設されており、この粘着物３６はフアイバー
グラス、ナイロン、ポリプロピレン、ポリエステ
ル等の織布の補強層すなわち基板層、又は不織布
の材料３８に重ねられている。
［発明の効果］ 上述したカーペツトタイルはクツシヨン性のあ
る発泡ベース層を備えている。このため、快適さ
が増すと共に、このカーペツトタイルが配設され
た場所で多くの時間の費やす人々に対して、快適
さが増すと共に疲労を減少させ、かつ防音効果を
高めることができる。このことは人々が毎日多く
の時間を費やす場所で特に効果的である。
なお、この発明の要旨を逸脱しない範囲で、
種々の変形を施して実施することができる。
【図面の簡単な説明】
第１図はこの発明の一実施例を示すカーペツト
タイルの断面図、第２図はこの発明の他の実施例
を示すカーペツトタイルの断面図である。 １２……カーペツトベース、１４……発泡ベー
ス層、１６……熱可塑性部材（粘着層）、１８…
…安定部材の層（ガラス製のスクリム）、２６…
…支持部材（支持裏張）、２８……発泡部材（ウ
レタンフオーム）。

Claims (1)

  1. 【特許請求の範囲】 １ 上方に突出したパイル糸を備えたカーペツト
    ベースと、 このカーペツトベースの下方に配置された発泡
    ベース層と、 この発泡ベース層とカーペツトベースとの間に
    配置され、これらを固定すると共に、その中に安
    定部材の層が埋設された熱可塑性部材層と、 を具備し、 前記発泡ベース層は、支持部材と発泡体とが積
    層され、この支持部材は、前記熱可塑性部材層に
    隣接して配置され、この熱可塑性部材を支持して
    いることを特徴とするカーペツトタイル。 ２ 前記パイル糸はカーペツトベースの基布に房
    状に植設されていることを特徴とする特許請求の
    範囲第１項記載のカーペツトタイル。 ３ 前記パイル糸はカーペツトベースの基布に接
    着されていることを特徴とする特許請求の範囲第
    １項記載のカーペツトタイル。 ４ 前記発泡体はウレタンフオームであることを
    特徴とする特許請求の範囲第１項記載のカーペツ
    トタイル。 ５ 前記発泡体の重さは337.5〜2025ｇ／m2であ
    ることを特徴とする特許請求の範囲第４項記載の
    カーペツトタイル。 ６ 前記発泡体の重さは1282.5ｇ／m2であること
    を特徴とする特許請求の範囲第５項記載のカーペ
    ツトタイル。 ７ 上方に突出したパイル糸を備えたカーペツト
    ベースと、 このカーペツトベースの下方に配置した発泡ベ
    ース層と、 カーペツトベースと発泡ベース層との間に配置
    して、カーペツトベースと発泡ベース層とを重ね
    る粘着物とを具備し、 この粘着物には寸法の安定性を与えるガラス繊
    維が埋設され、この発泡ベース層はウレタンフオ
    ームとこのウレタンフオーム上に重ねられた支持
    用のポリプロピレンの繊維とを有し、このウレタ
    ンフオームの重さは337.5〜2025ｇ／m2であるこ
    とを特徴とするカーペツトタイル。 ８ 前記ウレタンフオームは、堅い底表面を具備
    していることを特徴とする特許請求の範囲第７項
    記載のカーペツトタイル。
JP60210879A 1984-09-24 1985-09-24 カ−ペツトタイル Granted JPS61179113A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US653281 1984-09-24
US06/653,281 US4522857A (en) 1984-09-24 1984-09-24 Carpet tile with stabilizing material embedded in adhesive layer

Publications (2)

Publication Number Publication Date
JPS61179113A JPS61179113A (ja) 1986-08-11
JPH031966B2 true JPH031966B2 (ja) 1991-01-11

Family

ID=24620211

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60210879A Granted JPS61179113A (ja) 1984-09-24 1985-09-24 カ−ペツトタイル

Country Status (8)

Country Link
US (1) US4522857A (ja)
EP (1) EP0176346B1 (ja)
JP (1) JPS61179113A (ja)
AT (1) ATE49028T1 (ja)
AU (1) AU569416C (ja)
CA (1) CA1237057A (ja)
DE (1) DE3575003D1 (ja)
NZ (1) NZ213598A (ja)

Families Citing this family (120)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4629642A (en) * 1985-09-16 1986-12-16 The Dow Chemical Company Dimensionally stable carpet tiles having greige good adhered to wet-laid composite sheet
US5004638A (en) * 1986-06-30 1991-04-02 Hercules Incorporated Fabric lamination of unitary backed hot constructed carpet tile
US5160770A (en) * 1986-07-07 1992-11-03 Step Loc Corporation Carpet pads having pressure sensitive adhesive
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CA1237057A (en) 1988-05-24
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EP0176346B1 (en) 1989-12-27
JPS61179113A (ja) 1986-08-11
DE3575003D1 (de) 1990-02-01
ATE49028T1 (de) 1990-01-15
AU569416C (en) 2004-12-02
US4522857A (en) 1985-06-11
AU569416B2 (en) 1988-01-28
NZ213598A (en) 1988-02-29

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