JP2017149964A - 後続する樹脂注入のための乾式繊維質材料 - Google Patents
後続する樹脂注入のための乾式繊維質材料 Download PDFInfo
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- diisocyanate
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- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
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- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
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Abstract
【解決手段】ポリヒドロキシエーテル―ポリウレタンコポリマーと、メトキシアルキルメラミン架橋剤と、ブロックされたスルホン酸触媒とを含む、水性分散液からなるバインダー組成物。
【選択図】なし
Description
ープ機で生産された標準的拡幅テープと同様に、トウ画定およびトウ間間隙をほとんど残さない。
ィングされる。一実施形態において、不織ベールは、無作為に配列されたエポキシ樹脂に溶解可能である熱可塑性繊維を含有する。樹脂溶解可能なベールの詳細な説明は、例えば、米国公開特許出願第2006/0252334号に見出され得る。単方向テープは、構造繊維のウェブを拡幅し、それを行うテープ機を使用する従来の事前含浸方法によって作製されてもよい。次いで、樹脂溶解可能な熱可塑性ベールは、テープ形態を維持するように拡幅された構造繊維に積層される。
けるガラス転移温度(Tg)等の重要な積層の物理的特性を過度に犠牲にすることなく、注入および硬化後のコーティング繊維質成分と複合マトリックスとの間の結合強度における改善を提供する。
Vf=繊維体積分率、
Wf=繊維重量、
Wm=マトリックス樹脂重量、
ρf=繊維密度、
ρm=マトリックス樹脂密度である。
スリットテープの幅を制御するためにも役立つ。
バインダー複合体
陰イオンを形成することができ、かつイソシアネート基に反応性である少なくとも2つの基を有する化合物、
60〜400g/モルのMnを有する低いモル質量のポリオール、
その組み合わせからなる群から選択される少なくとも400g/モルの数平均モル質量(Mn)を有する1つまたは複数のポリオールを用いてポリイソシアネートを反応させ、合成され得る。
2,2―ビス(2―イソプロピル―4―ヒドロキシフェニル)プロパン、2,2―ビス―(4―ヒドルキシルナフチル)プロパン、2,2―ビス(4―ヒドロキシフェニル)―ペンタン、3,3―ビス(4―ヒドロキシフェニル)ペンタン、2,2―ビス(4―ヒドロキシフェニル)ヘプタン、ビス(4―ヒドロキシフェニル)フェニルメタン、ビス(4―ヒドロキシフェニル)シクロヘキシルメタン、1,2―ビス(4―ヒドロキシフェニル―1,2―ビス(フェニル)プロパン、2,2,―ビス(4―ヒドロキシフェニル)―l―フェニル―プロパン等のビス(ヒドロキシフェニル)アルカン、
語が、エチレン系不飽和がないジエポキシド、すなわち>C−C<、およびアセチレン系不飽和、すなわち、−C≡C−であることを意味される、飽和エポキシドが好ましい。炭素、水素、および酸素のみを含有するハロゲン置換飽和モノエポキシド、すなわち、エピクロルヒドリンおよび飽和ジエポキシド、特に、近接または隣接する炭素原子が脂肪族炭酸水素鎖の一部を形成するものが、特に好ましい。そのようなジエポキシド中の酸素は、オキシラン酸素に加えて、エーテル酸素―0―、オキサカルボニル酸素、カルボニル酸素等であり得る。
ウレタンコポリマーと、アミノプラスト架橋剤としてのメトキシアルキルメラミン(例えば、トリ〜ヘクサ―メトキシアルキルメラミン)と、ブロックされた酸触媒(ブロックされたスルホン酸触媒等)とを含有する分散液であり、
a. コポリマーは、10000〜100000Da範囲の数モル重量(Mn)お
よび1.1〜5の範囲の多分散性(Mw/Mn)を有してもよく、
b. コポリマーは、0.1〜50ミクロンの範囲の平均粒度(d50)を有して
もよい。
繊維質材料
はノンクリンプ織布の形態であってもよい。自立式単方向テープはスプール上に巻かれてもよく、ATL/AFP過程において使用され得る。ノンクリンプ織布(NCF)は、一緒に縫合される単方向トウを含む。トウは、間隙がトウの間に存在し、したがって材料中に透過性を提供するように互いに接触し、または接触しなくてもよい。対照的に、単方向テープは、繊維をまとめる一種のバインダー化学物質を含むため、縫合を含まない。Unifiberは、間隙または透過性が存在しないように繊維を一緒に結合する、細い糸を含む生成物に対する製品名である。
ミド等の高強度材料から作製されてもよい。繊維は、短繊維、連続繊維、繊維シート、織布、およびそれらの組み合わせのうちの任意の一つの形態を取ってもよい。繊維は、更に、単方向、多方向(例えば、二または三方向)、不織布、織布、編成、縫合、巻き付き、および編組構成、ならびにスワールマット、フェルトマット、およびチョップマット構造体のいずれも採用してもよい。織布繊維構造体は、約1000未満の微繊維、約3000未満の微繊維、約6000未満の微繊維、約12000未満の微繊維、約24000未満の微繊維、約48000未満の微繊維、約56000未満の微繊維、約125000未満の微繊維、および約125000を超える微繊維を有する複数の不織トウを含んでもよい。更なる実施形態において、トウは、交差トウ縫合、緯入れ編成縫合、またはサイジング剤等の少量の樹脂によって定位置に保持されてもよい。
ベール
プリフォーム
実施例
(1)図1に示す、Saertexによって供給される単方向ノンクリンプ織布(UD
NCF)。この織布は50インチ幅で生産される。炭素トウの画定は非常に明瞭であり、トウ間の間隙は最大2mm幅である。ポリエステル縫糸は、炭素トウをまとめる。細いポリエステル糸は、織布全体に積層して、織布に横方向の一貫性および安定性を提供する。
(2)図2に示すバインダーヤーン(Sigmatex Unifiberの織布)を有する拡幅したウェブ。炭素トウは、拡幅し、エポキシコーティングしたガラス糸によってテープの両側に保持する。トウ間の間隙または周辺部の間隙は存在しない。
MaterialsのCycom(登録商標)7720)でバインダーコーティングした。パウダー散布法を使用して、それぞれの織布の両面上に約5gsmのバインダー組成物を堆積させた。散布パウダー付き織布をダブルベルトプレスに通して、バインダーを繊維ウェブに更に押し込み、UD繊維ウェブの良好な結合力を確実にした。これは、安定化ステップと呼ばれる。加えて、バインダーを固定するために織布をダブルプレスに通すのと同時に、4gsmの織布面積重量を有する非常に軽重量の炭素ベールをそれぞれの織布の表面のうちの1つへと積層した。ダブルベルト処理条件は、2m/分の速度および210℃の温度であった。積層した安定化織布は非常に安定性があるが、展性であり、繊維の喪失またはエッジのほつれを伴わずに所望される形状への操作を可能にした。
実施例2
実施例3
ンプ織布を使用して、別法で同一の試験パネル(対照1)を準備した。様々な機械的試験をパネル上で実行し、結果を下の表3に示す
実施例5
比較的実施例―Z方向の透過性評価
、等しい幅および類似の面積重量の市販のバインダーコーティング/成形炭素トウ(IMS60 24K)のうちの1つと比較した。
Claims (12)
- 水性分散液の形態のバインダー組成物であって、
a.ポリヒドロキシエーテル―ポリウレタンコポリマーであって、
前記コポリマーの前記ポリヒドロキシエーテル部分が二価フェノールと飽和エポキシドに由来し、
前記コポリマーの前記ポリウレタン部分が、ポリイソシアネートと、脂肪族および芳香族ポリエーテルポリオール、ならびにポリエステルポリオールからなる群から選択されるポリオールとの反応生成物である、ポリヒドロキシエーテル―ポリウレタンコポリマーと、
b.メトキシアルキルメラミン架橋剤と、
c.ブロックされたスルホン酸触媒と、
を含む、バインダー組成物。 - 前記ポリヒドロキシエーテル―ポリウレタンコポリマーが10000Da〜100000Daの範囲の平均数モル重量を有する、請求項1に記載のバインダー組成物。
- 前記ポリイソシアネートが、エチレンジイソシアネート、1,4―テトラメチレンジイソシアネート、1,6―ヘキサメチレンジイソシアネート、2,4,4―トリメチル―1,6―ヘキサメチレンジイソシアネート、1,12―ドデカンジイソシアネート、シクロブタン―1,3―ジイソシアネート、シクロヘキサン―1,3―ジイソシアネート、1―イソシアネート―2―イソシアネートメチルシクロペンタン、イソホロンジイソシアネート、2,4―および/または2,6―ヘキサヒドロトルイレンジイソシアネート、2,4’―および/または4,4’―ジシクロヘキシルメタンジイソシアネート、a,a,a’,a―テトラメチル―1,3―および/または―1,4―キシリレンジイソシアネート、1,3―および1,4―キシリレンジイソシアネート、1―イソシアネート―1―メチル―4(3)―イソシアネートメチルシクロヘキサン、1,3―および1,4―フェニレンジイソシアネート、2,4―および/または2,6―トルイレンジイソシアネート、ジフェニルメタン―2,4’―および/または―4,4’―ジイソシアネート、ナフタレン―1,5―ジイソシアネート、トリフェニルメタン―4,4’,4”―トリイソシアネート、ポリフェニルポリメエチレンポリイソシアネートからなる群から選択される、請求項1に記載のバインダー組成物。
- 前記ポリオールが、ポリエーテルジオールである、請求項1に記載のバインダー組成物。
- 前記ブロックされたスルホン酸触媒が、アミン―ブロックされたスルホン酸である、請求項1に記載のバインダー組成物。
- バインダーで処理された繊維質材料を形成する方法であって、
構造繊維のプライを無作為に配列された繊維の不織ベールに積層して積層構造を形成する段階、
積層構造に請求項1に記載のバインダー組成物を適用する段階、および、
積層構造を乾燥する段階
を含み、
ここで、構造繊維のプライが単方向繊維を含み、バインダーで処理された繊維質材料が液体樹脂に対して透過性である、
方法。 - エポキシ系バインダーの粒子を、積層前の構造繊維のプライまたは不織ベール上に堆積
させる段階を更に含む、請求項6に記載の方法。 - 構造繊維のプライが不織ベール以外の他の層と結合していない、請求項7に記載の方法。
- 構造繊維のプライが単方向炭素繊維を含み、不織ベールが無作為に配列された炭素繊維を含む、請求項6に記載の方法。
- 請求項6に記載の方法により形成されたバインダーで処理された繊維質材料。
- 水性分散液の形態のバインダー組成物であって、
a.ポリヒドロキシエーテル―ポリウレタンコポリマーであって、
前記コポリマーの前記ポリヒドロキシエーテル部分が、一般式
(式中、Dは二価フェノールの残留ラジカルであり、Eは飽和エポキシドのヒドルキシル含有残留ラジカルであり、nは少なくとも30である)
を有し、
前記コポリマーの前記ポリウレタン部分が、ポリイソシアネートと、ポリエーテルポリオールならびにポリエステルポリオールからなる群から選択されるポリオールとの反応生成物である、ポリヒドロキシエーテル―ポリウレタンコポリマーと、
b.メトキシアルキルメラミン架橋剤と、
c.ブロックされたスルホン酸触媒と、
を含む、バインダー組成物。 - ポリヒドロキシエーテル部分が、ビスフェノールA(2,2−ビス(p−ヒドロキシフェニル)プロパン)とエピクロロヒドリンに由来する、請求項11に記載のバインダー組成物。
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