JP6130879B2 - 改質pva層を含有するセルロース繊維ベースの支持体、並びに、その製造及び使用の方法 - Google Patents
改質pva層を含有するセルロース繊維ベースの支持体、並びに、その製造及び使用の方法 Download PDFInfo
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- JP6130879B2 JP6130879B2 JP2015126324A JP2015126324A JP6130879B2 JP 6130879 B2 JP6130879 B2 JP 6130879B2 JP 2015126324 A JP2015126324 A JP 2015126324A JP 2015126324 A JP2015126324 A JP 2015126324A JP 6130879 B2 JP6130879 B2 JP 6130879B2
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- coating
- cellulose fiber
- silicone
- water
- based support
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Classifications
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Landscapes
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Description
セルロース繊維を含有する支持体を意味すると理解される。
− 該セルロース繊維ベースの箔を、パーチメント化処理(parchementizing)と共に又はなしで、形成すること、
− 該PHのヒドロキシル官能価と共有結合を形成することが出来る少なくとも1個のビニル官能基と1個のアルデヒド官能基を有する少なくとも1種の有機分子をグラフトさせることにより、該PHを官能化させること、
− 該セルロース支持体を、当業者に公知の方法により、少なくとも、該官能化PHで被覆することであって、この工程は20℃と80℃の間の温度、好ましくは65℃で有利に行うこと、
− 必要なら、該支持体をカレンダーに掛けるか又はスーパーカレンダーに掛けること
により製造することができる。
本発明とそれによってもたらされる利点は、以下の例示的態様の説明において、及び以下の図面を参照して、十分詳細に説明される。
100%セルロース繊維から成る箔(58g/m2)を、特に該繊維の精製工程を含んで、当業者に公知の方法により製造する。
− 上記の、本発明によるグラシン紙。
− 標準グラシン紙:Silca Classic Yellow 59g/m2。
Blue Star 槽:
ポリマー:11367−50g
架橋剤:12031−2.9g
触媒(60ppmの白金):12070−1.56g
通風乾燥キルン中150℃で30秒間架橋
ポリマー:D920−18.07g
架橋剤:XV525−1.43g
触媒(即ち、白金ベース):C05−2.14g
通風乾燥キルン中80℃で30秒間架橋
図2及び3により図解されている本実施例においては、グラシン紙中へのマラカイトグリーンによる針入度指数が、グラシン紙上にデポジットされたシリコーン量に従って詳細に調べられる。
本実施例では、該シリコーン層の架橋割合(即ち、ポリ試験)及び固定(即ち、こすり試験)を調査した。該LTCシリコーンを、80℃で標準グラシン紙及び本発明によるグラシン紙上にデポジットした。
本発明に関連するもう一つの利点は、シリコナイジング工程中必要な触媒(即ち、白金)の量を減少させることである。現在では白金がシリコナイジングで使用される材料の全原価の約30%を占めることを考慮すると、より少量の触媒(即ち、白金)を使用してシリコーン処理されたグラシン紙を得ることができるということは、極めて魅力的である。
シリコナイジング中に使用された白金の量に関して剥離力を測定した。比較中のグラシン紙(標準グラシン紙及びグラシン紙INV)の両方が、行った試験のすべてについて同じ値、即ち、83,60及び30ppmの白金について夫々88、119及び138cN/5cmを示していることに気付いて意外であった。それらの試験は、70℃で押圧後1時間してそれらのグラシン紙とTESA4970接着剤について剥離力を測定することにあった。
本実施例は、特定の条件下における、標準グラシン紙と比較したグラシン紙INVの耐用寿命を説明する。図6及び7は本実施例を図解している。
標準グラシン紙及びグラシン紙INVをパイロット機械でシリコーン処理した。工業的窯構造を有して、パイロット機械幅は1.3メートルで最大機械速度は1610m/minである。
使用したシリコーンは、Dow Corning SL 161(高速度でシリコナイジング処理を可能にするため曇り防止剤を添加した標準SL 160シリコーンと類似している)であった。
グラシン紙INVをパイロット機械でシリコーン処理した。工業的窯構造を有して、パイロット機械幅は1.3メートルで最大機械速度は1610m/minである。触媒含量をできるだけ減少させるため、次の特定シリコーン系(速硬化系シリコーン)を使用した:Dow Corning SL 400(速硬化性シリコーン系:SL 160について50ppm白金の代りに35ppm白金)。
実験室規模で95℃において1リッターの水に80gのPVAを溶解させた。次にそれを、酸性条件(硫酸でpH=1.5)において90℃で1時間1.3gのウンデセナールと反応させた。該反応の終りに、水酸化ナトリウムを使用してpHを7に調節した。
− 16%の官能化PVAと84%のクレイ顔料(即ち、低官能化PVA配合:LFP配合)
− 28%の官能化PVAと72%のクレイ顔料(即ち、高官能化PVA配合:HFP配合)。
− 変換機でシリコナイジング速度を増加させる、
− シリコーン配合中の触媒(即ち、白金)含量を減少させる、
− 多湿条件においてシリコーン固定を改良する、
− シリコーン消耗を減少させる。
LTCシリコーンを使用することにより得られた予備的な結果のお陰で、今度は本発明の官能化PVAを用いて製造されたクレイコーテッド紙に関して、このようなパラメーターが改良されるかも知れない。
Claims (21)
- 少なくとも一表面がヒドロキシル官能基を有する少なくとも1種の水溶性ポリマーを含有する層で被覆されており、該ヒドロキシル官能基の少なくともいくつかと、少なくとも1個のビニル官能基を含有する少なくとも1種の有機分子とが前もって反応しているセルロース繊維ベースの支持体であって、前記有機分子が、以下の式:
CH2=CH−(R)−CH=O
(式中、Rは、1〜11個の炭素原子を有する線状の炭素鎖である。)
を有することを特徴とする支持体。 - 前記有機分子のアルデヒド官能基が、ヘミアセタール又はアセタールの形態をしていることを特徴とする、請求項1に記載のセルロース繊維ベースの支持体。
- ヒドロキシル官能基を有する該水溶性ポリマーが、澱粉、アルギン酸塩、CMC、並びに、エチレン・酢酸ビニル(EVA)又は塩化ビニル・酢酸ビニル、N−ビニルピロリドン・酢酸ビニル、及び無水マレイン酸・酢酸ビニルコポリマーをヒドロキシル基を形成するように加水分解することにより得ることができる、加水分解又は部分加水分解された酢酸ビニルのコポリマーを含む群から選択されることを特徴とする、請求項1又は2に記載のセルロース繊維ベースの支持体。
- ヒドロキシル官能基を有する該水溶性ポリマーが、PVAであることを特徴とする、請求項1又は2に記載のセルロース繊維ベースの支持体(但し前記有機分子がウンデシレンアルデヒドではない)。
- 前記有機分子が、ヒドロキシル官能基を有する該水溶性ポリマーの重量で0.1%と5%の間に相当することを特徴とする、請求項1〜4のいずれか1項に記載のセルロース繊維ベースの支持体。
- 前記有機分子が、ヒドロキシル官能基を有する該水溶性ポリマーの重量で1%に相当することを特徴とする、請求項1〜4のいずれか1項に記載のセルロース繊維ベースの支持体。
- ヒドロキシル官能基を有する該官能化水溶性ポリマーが、該セルロース繊維ベースの支持体上に塗布された最上層の重量で少なくとも10%を構成することを特徴とする、請求項1〜6のいずれか1項に記載のセルロース繊維ベースの支持体。
- ヒドロキシル官能基を有する該官能化水溶性ポリマーが、該セルロース繊維ベースの支持体上に塗布された最上層の重量で20%と100%の間を構成することを特徴とする、請求項1〜6のいずれか1項に記載のセルロース繊維ベースの支持体。
- 該セルロース繊維ベースの支持体上に塗布された最上層が、0.2〜20g/m2の量でデポジットされていることを特徴とする、請求項7又は8に記載のセルロース繊維ベースの支持体。
- 該セルロース繊維ベースの支持体上に塗布された最上層が、1g/m2の量でデポジットされていることを特徴とする、請求項7又は8に記載のセルロース繊維ベースの支持体。
- 該セルロース繊維の質量が、30〜160g/m2の範囲であることを特徴とする、請求項1〜10のいずれか1項に記載のセルロース繊維ベースの支持体。
- 該セルロース繊維の質量が、55〜140g/m2の範囲であることを特徴とする、請求項1〜10のいずれか1項に記載のセルロース繊維ベースの支持体。
- 該セルロース繊維の質量が、58g/m2程度であることを特徴とする、請求項1〜10のいずれか1項に記載のセルロース繊維ベースの支持体。
- 以下の工程:
該セルロース繊維ベースの箔を形成すること;
ヒドロキシル官能基を有する該水溶性ポリマーのヒドロキシル官能価と共有結合を形成することが出来る少なくとも1個のビニル官能基と1個のアルデヒド官能基を有する、少なくとも1種の有機分子をグラフトさせることによって、ヒドロキシル官能基を有する該水溶性ポリマーを官能化させること;
該セルロース支持体を、少なくとも、ヒドロキシル官能基を有する該官能化水溶性ポリマーで被覆すること;
必要なら、該支持体をカレンダーに掛けるか又はスーパーカレンダーに掛けること;
からなる、請求項1〜13のいずれか1項に記載のセルロース繊維ベースの支持体を製造する方法。 - パーチメント化処理と共に、又はそれなしで、該セルロース繊維ベースの箔を形成することを特徴とする、請求項14に記載の方法。
- ヒドロキシル官能基を有する該水溶性ポリマーを、水性媒体中且つ酸性状態を達成するための有機酸又は無機酸の存在下、20℃と95℃の間の温度で官能化させることを特徴とする、請求項14又は15に記載の方法。
- ヒドロキシル官能基を有する該水溶性ポリマーを、水性媒体中且つ酸性状態を達成するための有機酸又は無機酸の存在下、80℃と95℃の間の温度で官能化させることを特徴とする、請求項14又は15に記載の方法。
- 使用される被覆技術が、サイズ・プレス、計量サイズ・プレス、フーラード塗工、ロッド塗工、「チャンピオン」バー塗工、「マイアー」バー塗工、エアナイフ塗工、グラビア塗工、スクレーパー・ブレード塗工、スライディング・ブレード塗工、単層及び多層カーテン塗工、リバースロール塗工、スプレー塗装、噴霧塗装、液体塗布システム(LAS)被覆、キス塗装、フォーム塗装、又は任意の表面被覆塗布方法を含むことを特徴とする、請求項14〜17のいずれか1項に記載の方法。
- 該セルロース支持体の被覆が、20℃と80℃の間の温度で行われることを特徴とする、請求項14〜18のいずれか1項に記載の方法。
- 該セルロース支持体の被覆が、65℃の温度で行われることを特徴とする、請求項14〜18のいずれか1項に記載の方法。
- 請求項1〜13のいずれか1項に記載のセルロース繊維ベースの支持体の、シリコーン処理のための使用。
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