JP7422489B2 - セルロースナノフィラメントを含むマルチ密度紙製品 - Google Patents
セルロースナノフィラメントを含むマルチ密度紙製品 Download PDFInfo
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- JP7422489B2 JP7422489B2 JP2018569044A JP2018569044A JP7422489B2 JP 7422489 B2 JP7422489 B2 JP 7422489B2 JP 2018569044 A JP2018569044 A JP 2018569044A JP 2018569044 A JP2018569044 A JP 2018569044A JP 7422489 B2 JP7422489 B2 JP 7422489B2
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Description
本発明は、セルロースナノフィラメントを含むペーパーウェブ製品、より特定的には、セルロースナノフィラメントを含むマルチ密度タオルまたはティッシュペーパーウェブ構造物に関する。
本明細書では、「紙製品」は、伝統的にセルロース繊維を含むが、必ずしもそうではない、任意の形成された、繊維状構造物製品を示す。1つの実施形態では、本発明の紙製品は吸収性タオル製品を含む。他の実施形態では、本発明の紙製品はソフトサニタリティッシュ製品を含む。
所望であれば、様々な化学添加組成物が、消費者所望の利点、例えば柔らかさ、少ない糸くず、吸収性、シート柔軟性、および一時的および/または永久的湿潤強化添加物をさらに増強させるために任意で使用され得る。化学添加物は剥離剤(debonder)、ケイ素軟化添加物、非ケイ素軟化添加物、強化添加物、吸収性添加物および美的添加物からなる群より選択される。
化学剥離剤はまた、ウェブを軟化させるために適用することができる。特定的には、化学剥離剤はウェブの1つ以上の層内の水素結合の量を低減させることができ、これによりよりソフトな製品が得られる。得られるティッシュ製品の所望の特性によって、剥離剤は、ペーパーウェブの乾燥繊維ベースの0重量%~約3.0重量%、好ましくは約0.1~約2.0重量%、より好ましくは約0.5~約1.0重量%の量で適用することができる。剥離剤は単層または多層ティッシュウェブの任意の層に組み入れることができる。
主として滑らかな手触りを付与することにより機能する化学軟化剤が所望である場合、ポリシロキサンまたは「ケイ素」が使用され得る。得られるティッシュ製品の所望の特性によって、ケイ素はペーパーウェブの乾燥繊維ベースの0重量%~約3.0重量%、好ましくは約0.1~約2.0重量%、より好ましくは約0.5~約1.0重量%の量で適用することができる。ケイ素は、単層または多層ティッシュウェブの任意の層に組み入れることができる。本発明において使用するのに好適なケイ素化合物は下記で詳細に記載される。
化学抄紙添加物乳化界面活性剤材料以外の任意の界面活性剤は以後「界面活性剤」と呼ばれ、乳化された化学抄紙添加物の乳化成分として存在する任意の界面活性剤は以後「乳化剤」と呼ばれる。界面活性剤はティッシュペーパーに単独で、または他の化学抄紙添加物と同時に、その後に、もしくはその前に適用され得る。典型的なプロセスでは、別の添加物が存在する場合、界面活性剤はセルロース基材に他の添加物(複数可)と同時に適用される。糸くず制御のために、および/または引張強さを増加させるために、剥離剤含有ティッシュペーパーを比較的低いレベルのバインダで処理することもまた、望ましい可能性がある。
(R1)4-m-N+-[R2]mX-
mは1~3であり;
各R1はC1-C8アルキル基、ヒドロキシアルキル基、ヒドロカルビルもしくは置換ヒドロカルビル基、アルコキシル化基、ベンジル基、またはそれらの混合物であり;各R2はC9-C41アルキル基、ヒドロキシアルキル基、ヒドロカルビルもしくは置換ヒドロカルビル基、アルコキシル化基、ベンジル基、またはそれらの混合物であり;ならびにX-は任意の軟化剤-適合性アニオンである。好ましくは、各R2はC16-C18アルキルであり、最も好ましくは各R2は直鎖C18アルキルである。好ましくは、各R1はメチルであり、X-は塩化物またはメチルスルフェートである。任意で、R2置換基は植物油源由来とすることができる。下記式を有する生分解性エステル-官能性四級アンモニウム化合物もまた、本発明で使用することができる:
(R1)4-m-N+-[(CH2)n-Y-R2]mX-
各Y=-O-(O)C-、または-C(O)-O-;
m=1~3;好ましくは、m=2;
各n=1~4;好ましくは、n=2;
各R1置換基は短鎖C1-C6、好ましくはC1-C3、アルキル基、例えば、メチル(最も好ましい)、エチル、プロピル、など、ヒドロキシアルキル基、ヒドロカルビル基、ベンジル基またはそれらの混合物であり;各R2は長鎖、少なくとも部分不飽和(約5超~約100未満、好ましくは約10~約85のIV)、C11-C23ヒドロカルビル、もしくは置換ヒドロカルビル置換基であり、対イオン、X-は任意の軟化剤適合性アニオン、例えば、酢酸、塩化物、臭化物、メチル硫酸、ギ酸、硫酸、硝酸などである。好ましくは、R2の大半は、少なくとも90%のC18-C24鎖長を含有する脂肪アシルを含む。より好ましくは、R2の大半は、少なくとも90%のC18、C22およびそれらの混合物を含有する脂肪アシルからなる群より選択される。
増強された吸収性が所望である場合、界面活性剤が、本発明のペーパーウェブを処理するために使用され得る。界面活性剤のレベルは、使用される場合、1つの実施形態では、ティッシュウェブの乾燥繊維重量ベースにより約0.01%~約2%とすることができる。1つの実施形態では、界面活性剤は8以上の炭素原子を有するアルキル鎖を有する。あるいは、高度の不飽和(モノおよび/またはポリ)および/または分枝鎖アルキル基を有するカチオン性軟化剤活性材料成分は著しく吸収性を増強させることができる。
美的添加物が所望である場合、それは下記化学薬品の群から選択することができる:インク;染料;芳香剤;乳白剤(例えばTiO2または炭酸カルシウム)、光学的増白剤、およびそれらの混合物。紙の美学もまた、この発明で記載されるプロセスを使用して、改善することができる。インク、染料、および/または芳香剤は好ましくは、水性組成物に添加され、その後、それはティッシュペーパーウェブに適用される。美学添加物は単独で、または湿潤、軟化、および/または強度添加物と組み合わせて適用され得る。
本発明を以下、発明の全ての実施形態ではないが、いくつかが示される添付の図面を参照して、以後より詳しく記載する。実際、これらの発明は多くの異なる形態で具体化され得、本明細書で明記される実施形態に限定されるものと解釈されるべきではなく;むしろ、これらの実施形態は、この開示が適用可能な法的必要条件を満たすように提供される。同様の数字は全体を通して同様の要素を示す。
図1では、抄紙へッドボックス1を有するツインワイヤフォーマーは、抄紙繊維の水性懸濁液の完成紙料を複数のフォーミングファブリック、例えば外側フォーミングファブリック5および内側フォーミングファブリック3上に注入または堆積させ、これにより、ウェットティッシュウェブ6が形成される。本開示の形成プロセスは、抄紙業界で知られている任意の従来の形成プロセスであってもよい。そのような形成プロセスとしては、長網、ルーフフォーマー、例えばサクションブレストロールフォーマー、およびギャップフォーマー、例えばツインワイヤフォーマーおよびクレセントフォーマーが挙げられるが、それらに限定されない。
抄紙機10が図2に示される。抄紙機はウェットセクションまたは形成セクション20、プレスセクション30および乾燥セクション50を含む。ウェットセクション20はへッドボックス22、フォーミングロール23、エンドレス内側布24、およびフォーミングワイヤーからなるエンドレス外側布25を含む。内側および外側布24および25は、それぞれ、いくつかのガイドロール26および27周りの別個のループで動く。
本明細書で示される事項は例示であり、本発明の実施形態の事例的説明目的のものにすぎず、最も有用であると考えられるものならびに本発明の原理および概念的見地の容易に理解される説明を提供するために提示される。この関連で、本発明の基本的理解に必要なもの以上により詳細に、本発明の構造的細部を示す試みはなにもなされず、本発明の形態が実際にはどのように具体化され得るかについて当業者にあきらかにする説明が図面と共に記載される。
図4を参照して、この発明を実施する方法を詳細に記載する。図4は、加熱組成物のオフライン適用に好適なクレープ加工なしスルーエア乾燥ベースシートを製造するためのプロセスを示す。抄紙繊維の水性懸濁液流をフォーミングファブリック2上に注入または堆積させる層状抄紙へッドボックス1を有するツインワイヤフォーマーが示される。ウェブはその後、ファブリック4にトランスファーされ、これは新たに形成されたウェットウェブを支持し、プロセスの下流に運搬するように機能し、その間、ウェブは約10乾燥重量パーセントの濃度まで部分的に脱水される。ウェットウェブの追加の脱水は、例えば真空吸引により実施することができ、その間、ウェットウェブはフォーミングファブリックにより支持される。
Claims (12)
- 密度差のある吸収タオルペーパーウェブ製品の乾燥繊維ベースの0.05重量パーセント~20.0重量パーセントの30nm~500nmの平均幅および200~5000のアスペクト比を有するセルロースナノフィラメントを含むことを特徴とし、前記セルロースナノフィラメントが、高アスペクト比セルロースナノフィラメントおよび少なくとも約5重量%のセルロース極細繊維を含むことをさらに特徴とする、密度差のある吸収タオルペーパーウェブ製品。
- 密度差のある吸収タオルペーパーウェブ製品の乾燥繊維ベースの0.5重量%~5.0重量%の湿潤強度ポリマを含むことをさらに特徴とする、請求項1に記載の密度差のある吸収タオルペーパーウェブ製品。
- 前記セルロースナノフィラメントが、ミクロおよびナノサイズのセルロースフィラメントのブレンドであることをさらに特徴とする、請求項1または2に記載の密度差のある吸収タオルペーパーウェブ製品。
- ミクロおよびナノサイズのセルロースフィラメントの前記ブレンドが:
a)少なくとも50%の前記セルロースナノフィラメント;および
b)少なくとも10%の無傷のフィブリル化繊維、前記無傷のフィブリル化繊維は、前記繊維本体から解放されるが、前記繊維に一端で結合されたままである個々のセルロースフィラメントまたはその束を含む、
をさらに特徴とする、請求項3に記載の密度差のある吸収タオルペーパーウェブ製品。 - 前記密度差のある吸収性タオルペーパーウェブ製品が、スルーエア乾燥(TAD)吸収性タオルペーパーウェブ製品、新ティッシュ技術(NTT)吸収性タオルペーパーウェブ製品、先進ティッシュ成型システム(ATMOS)吸収性タオルペーパーウェブ製品、およびクレープ加工なしスルーエア乾燥(UCTAD)吸収性タオルペーパーウェブ製品から成る群から選択されることをさらに特徴とする、請求項1~4のいずれか一項に記載の密度差のある吸収タオルペーパーウェブ製品。
- 前記密度差のある吸収タオルペーパーウェブ製品の乾燥繊維ベースの20重量%超過~89.9重量%の軟材繊維を含むことをさらに特徴とする、請求項1~5のいずれか一項に記載の密度差のある吸収タオルペーパーウェブ製品。
- 密度差のあるソフトサニタリーティッシュペーパーウェブ製品の乾燥繊維ベースの0.05重量パーセント~20.0重量パーセントの30nm~500nmの平均幅および200~5000のアスペクト比を有するセルロースナノフィラメントを含むことを特徴とし、前記セルロースナノフィラメントが、高アスペクト比セルロースナノフィラメントおよび少なくとも約5重量%のセルロース極細繊維を含むことをさらに特徴とする、密度差のあるソフトサニタリーティッシュペーパーウェブ製品。
- 密度差のあるソフトサニタリーティッシュペーパーウェブ製品の乾燥繊維ベースの0重量%超過~56.4重量%の軟材繊維を含むことをさらに特徴とする、請求項7に記載の密度差のあるソフトサニタリーティッシュペーパーウェブ製品。
- 密度差のあるソフトサニタリーティッシュペーパーウェブ製品の乾燥繊維ベースの0.5重量%~3.0重量%の湿潤強度ポリマを含むことをさらに特徴とする、請求項7または8に記載の密度差のあるソフトサニタリーティッシュペーパーウェブ製品。
- 前記セルロースナノフィラメントがミクロおよびナノサイズのセルロースフィラメントのブレンドであることをさらに特徴とする、請求項7~9のいずれか一項に記載の密度差のあるソフトサニタリーティッシュペーパーウェブ製品。
- ミクロおよびナノサイズのセルロースフィラメントの前記ブレンドが:
a)少なくとも50%のセルロースナノフィラメント;および
b)少なくとも10%の無傷のフィブリル化繊維、前記無傷のフィブリル化繊維は、前記繊維本体から解放されるが、前記繊維に一端で結合されたままである個々のセルロースフィラメントまたはその束を含む、
をさらに特徴とする、請求項10に記載の密度差のあるソフトサニタリティッシュペーパーウェブ製品。 - 密度差のあるソフトサニタリーティッシュペーパーウェブ製品が、スルーエア乾燥(TAD)ソフトサニタリーティッシュペーパーウェブ製品、新ティッシュ技術(NTT)ソフトサニタリーティッシュペーパーウェブ製品、先進ティッシュ成型システム(ATMOS)ソフトサニタリーティッシュペーパーウェブ製品、およびクレープ加工なしスルーエア乾燥(UCTAD)ソフトサニタリーティッシュペーパーウェブ製品から成る群から選択されることをさらに特徴とする、請求項7~11のいずれか一項に記載の密度差のあるソフトサニタリーティッシュペーパーウェブ製品。
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US10724173B2 (en) | 2020-07-28 |
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