CN105308241B - 高性能织物剥离组合物及其用途 - Google Patents

高性能织物剥离组合物及其用途 Download PDF

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CN105308241B
CN105308241B CN201480021690.7A CN201480021690A CN105308241B CN 105308241 B CN105308241 B CN 105308241B CN 201480021690 A CN201480021690 A CN 201480021690A CN 105308241 B CN105308241 B CN 105308241B
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D·D·崔
D·E·沙洛颜
C·P·迪尔克斯
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Suo Li Cisco Skill Cayman Co
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Abstract

本发明提供一种用于在例如薄纸和毛巾制造方法的应用中提高织物剥离的组合物以及方法。所述方法包括在结构化纸页制造应用中使用含有疏水季铵化氨基酰胺(例如咪唑啉)与其它疏水物和表面活性剂的组合物来处理织物的表面。

Description

高性能织物剥离组合物及其用途
本发明要求于2013年4月18日提交的美国专利申请号61/813286的权益，其全部内容在此通过援引加入本文中。
技术领域
本申请提供用于在例如薄纸和毛巾的制造方法的应用中提高织物剥离的组合物以及方法。所述方法包括在薄纸造纸机的结构化纸页的制造应用中使用包含疏水季胺与其它疏水物和表面活性剂的组合物来处理织物的表面。
背景技术
用于制造产品例如化妆纸、卫生纸和厨房纸巾的薄纸制造方法包括由含水纸浆和化学添加剂形成湿薄纸幅，然后从湿薄纸中除去水。水的除去可通过将湿薄纸压榨到例如Yankee烘缸或Yankee干燥机上，这两个术语在本文中可互换使用。直到最近，在干法起皱新月形成形器(Dry Crepe Crescent Former)上以及热风穿透干燥(TAD)法制备薄纸。热风穿透干燥(TAD)法包括将纸幅转移到TAD织物上，所述TAD织物具有3维特性并产生湿纸幅结构和图案，从而当干燥时，所述图案留在薄纸中。这通过将热风穿透湿薄纸提供水除去并干燥纸幅来完成。然后将结构化薄纸或图案化薄纸转移到Yankee烘缸中用于进一步干燥和起皱。热风穿透干燥法(TAD)可产生具有提高体积和柔软度、更高强度和吸水性的更高质量的薄纸。
当降低水含量时，纤维彼此紧密接近，缔合度和粘合显著增长。纤维不仅彼此粘附，而且还易于粘附到织物上。薄纸对织物表面增加的粘附是不希望的，因为这可能影响纸幅结构，导致在织物表面上形成纤维沉积，并导致从织物剥离薄纸，并将其进一步转移到例如Yankee烘缸中更复杂。为了避免这些不希望的影响，使用了很多处理，包括改进织物的覆盖材料，和/或施用各种织物剥离剂以帮助薄纸与织物的分离。在将纸幅从成形织物转移到剥离织物之前，通常将织物剥离剂施加到织物表面上。
最近在薄纸制造领域中的进展提供大规模的TAD法以及干法起皱薄纸(DCT)的速度和能耗效率。方法例如Metso’s NTT法和Voith公司的高级薄纸模塑系统(ATMOS)使用纹理化或结构化的织物或带。
疏水材料例如硅油、矿物油和植物油，以及聚α-烯烃已用于处理TAD织物。由于是将疏水材料加入到含水体系中，这些化学品的应用并不是一直简单直接的。在许多情况下，将这些疏水材料与表面活性剂混合。将表面活性剂例如非离子表面活性剂加入到疏水材料中具有有益效果，因为所述表面活性剂有助于乳化所述疏水材料(例如矿物油)和促进更有效的递送并在表面例如TAD织物或Yankee烘缸的表面上铺展疏水物，并可对金属、织物和其它表面具有有益效果。
美国专利8,071,667教导将一种或多种聚C5-C20α-烯烃与一种或多种表面活性剂组合用于在热风穿透干燥过程中将纸幅与织物剥离和/或用于将纸幅与Yankee烘缸剥离。所要求保护的组合物包含99％-60％的α-烯烃和1％-40％的表面活性剂。
美国专利申请2005/0241791公开了一种制造纤维素薄纸纸幅的方法，其通过用化学脱粘剂来处理薄纸造纸机的网部表面。所述化学脱粘剂包含油烯基咪唑鎓化合物。所述组合物还包含润滑剂和表面活性剂。将所述组合物施加到薄纸网部上，并通过对网部进行真空抽吸使化学脱粘剂分布到网部的整个厚度上。建议将所述组合物施加到快速转移和热风穿透干燥操作之间的网部上或第一次和第二次热风穿透干燥操作之间的网部上。
在本申请中所引用的每个参考文献包括书籍、专利、公布申请、期刊文章和其它出版物，在此通过援引将它们全部并入本文。
发明内容
本发明涉及用于降低薄纸纸幅和表面例如在薄纸制造过程中所使用的结构化或纹理化的织物、带、盘或辊之间的粘附力的组合物和方法，从而提高薄纸纸幅与例如TAD织物表面的剥离。所述方法包括将组合物施加到例如TAD织物表面、结构化织物表面、造纸带表面、纹理化或结构化的带表面、印版滚筒或辊表面，或Yankee烘缸表面上，所述组合物包含疏水氨基酰胺季铵盐，以及a)不同于氨基酰胺的至少一种疏水组分，c)一种或多种表面活性剂和/或它们的混合物。
在一个实施方案中，本发明还涉及一种降低纸张与织物表面的粘附力的方法，其通过将包含环状或直链的季铵化疏水氨基酰胺或它们的混合物、矿物油以及表面活性剂的组合物施加到织物表面。所提出的配制物可通过喷雾器或辊式涂敷器施用到所感兴趣的表面上。
具体实施方式
本发明涉及可用于降低所形成的薄纸纸幅和织物表面之间的粘附力的组合物和方法。所述组合物包含疏水胺例如低分子量的疏水咪唑啉和非环状疏水氨基酰胺季铵盐和/或它们的混合物，与至少一种a)另一种疏水组分例如矿物油和植物油，和/或b)表面活性剂例如线型聚乙二醇酯、各种脂肪酸例如油酸、硬脂酸和棕榈酸的单酯和二酯，以及c)它们的混合物。
本发明还涉及将疏水组合物或含水乳液施加到薄纸造纸机的表面上，从而降低薄纸对织物的粘附力并提高薄纸剥离。
还预期本发明的组合物可用到其它薄纸应用的表面上，例如结构化织物、纹理化/结构化的带、盘或辊的处理。例如，在Metso’s NTT方法中的纹理化带或在Voith公司的高级薄纸模塑系统(ATMOS)方法中所使用的结构化或纹理化的辊。
术语“疏水胺”定义为任意低分子量的胺或含铵化合物，其中胺或铵基的氮键合到疏水基团或脂肪基团上，例如烃链或氟碳链上。所述胺可以是直链或支链脂肪烷基胺、铵化合物、环状咪唑啉、直链氨基酰胺等。
发现本发明的低分子量疏水胺在降低薄纸对例如TAD织物的粘附力中非常有效，以及在TAD织物剥离应用中非常有效。疏水胺包括，例如季铵化氨基酰胺和/或连接一个或两个疏水基团的季铵化咪唑啉环状结构以及它们的混合物。所述组合物可包含季铵化线性氨基酰胺、季铵化环状咪唑啉和/或它们的混合物。
以下式I和式II代表可用于本发明的季铵化氨基酰胺：
其中
R1可以是饱和或不饱和的、直链或支链的C12-C22脂族基团，以及可以是C16-C18脂族基团；
R2可以是甲基或乙基；以及
X可以是抗衡离子，例如乙基硫酸根或甲基硫酸根。
本发明的胺通过脂肪酸(例如油酸、棕榈酸或硬脂酸)与二亚乙基三胺或氨基乙基乙醇胺之间反应，然后通过硫酸二乙酯、硫酸二甲酯或乙酸对所得氨基酰胺进行季铵化来制备。疏水链的数量取决于脂肪酸与胺的比例，可以是约1:1的比例，可以是约2:1的比例。
咪唑啉季铵化产物的环化或闭环的程度取决于反应条件。在特定条件下，可以是最多约90％环化。在其它情况下，可以低至10％环化，产生环状咪唑啉季铵盐和线性氨基酰胺季铵盐的混合物。咪唑啉和非环状氨基酰胺季铵盐强烈吸附到带负电荷的材料例如织物、金属和纤维的表面上，使它们疏水化。
术语“矿物油”定义为意指来自矿物源的油，并且可以是直链、支链和芳族的烃、石蜡和蜡类的混合物。术语“表面活性剂或非离子表面活性剂”用于定义包括但不限于二醇和各种脂肪酸的单酯和二酯的组合物。非离子表面活性剂的其它实例可包括，例如直链或支链脂肪醇乙氧基化物、脂肪醇烷氧基化物、聚氧乙烯-聚氧丙烯嵌段共聚物、脂族聚醚、乙氧基化聚甲基烷基硅氧烷、烷基聚葡萄糖苷、乙氧基化山梨聚糖衍生物、脱水山梨糖醇脂肪酸酯、烷基苯基乙氧基化物，以及烷氧基化胺。
通过深入研究，我们已经发现，季铵化咪唑啉和氨基酰胺的混合物，比TAD织物剥离应用中通常所使用的矿物油、聚α-烯烃和其它疏水材料，在降低薄纸纸幅和TAD织物表面之间的粘附力上更有效。我们还发现，季铵化咪唑啉和氨基酰胺与其它疏水材料例如矿物油或植物油的组合，与包含单个组分的组合物相比较，在TAD织物剥离应用中更有效。
通过这样的工作，我们发现，咪唑啉和氨基酰胺季铵盐比α-烯烃和矿物油，在织物剥离应用中更有效。因此，人们会认为在具有咪唑啉季铵盐的配制物中增加α-烯烃或矿物油的含量，会降低咪唑啉季铵盐-矿物油混合物的效力。然而，我们发现，当使用包含季铵化氨基酰胺和不同于氨基酰胺的至少一种其它疏水组分例如矿物油的组合物来处理织物的表面时，提高了织物剥离，其中所述其它疏水组分占整个组合物的至多约60重量％，可以占整个组合物的约5重量％-约40重量％。在季铵化氨基酰胺的混合物中加入矿物油提高了TAD织物剥离，这是完全出乎意料的。此外，还发现，季铵化氨基酰胺与不同于氨基酰胺的至少一种其它疏水活性物以及非离子表面活性剂的组合导致薄纸纸幅和TAD织物之间的粘附力的降低。
在一个实施方案中，穿透热风干燥(TAD)织物剥离组合物包含一种或多种季铵化氨基酰胺、不同于氨基酰胺的至少一种疏水组分、以及任选存在的一种或多种非离子表面活性剂，其中所述季铵化氨基酰胺是低分子量的咪唑啉和非环状氨基酰胺季铵盐和/或它们的混合物，并且占整个组合物的20重量％-99重量％，可占整个组合物的约40重量％-约75重量％；其中所述至少一种疏水组分是矿物油、植物油、硅油、聚α-烯烃和/或它们的混合物，占整个组合物的至多60重量％，可以占整个组合物的约5重量％-约40重量％；其中所述表面活性剂是二醇和/或其酯，脂肪酸的单酯和二酯，和/或它们的混合物；并且其中所述非离子表面活性剂占整个组合物的0％-约40重量％，可以占整个组合物的约10重量％-约30重量％。
在另一个实施方案中，将包含a)疏水咪唑啉和疏水非环状氨基酰胺的混合物，b)矿物油和c)聚乙二醇二酯例如油酸、硬脂酸和棕榈酸的配制物用于降低薄纸和TAD织物之间的粘附力。
在另一个实施方案中，可将所述组合物用于在薄纸制造方法中例如用于Yankee剥离应用的薄纸造纸厂中提高薄纸剥离。
结合若干特定实施例来描述本发明，所述特定实施例被视为示例性的，并非限制本发明的范围。
实施例
评价本发明的组合物在降低湿薄纸对TAD织物材料的粘附力的能力。在由Hercules Inc设计的TAD织物剥离测试仪上测试若干配制物以测量所述组合物对所产生的粘附力的影响以及对配制物进行Zwick剥离测试(参看Choi,D.D.，“New SimulationCapability Turns Art into Science for Structured Tissue and Towel MakingProcesses，”Proceedings of Tissue 360Forum，PaperCon 2013，2013)。用60mg/m3和120mg/m2的处理水平测试水溶液形式的所述配制物。
下表1A、1B和1C中所列出的咪唑啉包括以下物质：
咪唑啉A，其是环状咪唑啉和由油酸与二亚乙基三胺(2:1的比例)反应所形成的线性单酰胺和双酰胺的混合物，用硫酸二甲酯季铵化。
通过比较在用本发明的组合物对TAD织物表面处理所进行的实验和空白实验的结果，确定本发明组合物的效力，其中在所述空白实验中，TAD织物表面没有用本发明的组合物处理。
表1汇总了结果，其记录了空白(未处理表面)和处理表面(第3和4栏)的粘附力的绝对值，以及相对空白处理(第5和6栏)以降低％所表示的相对效果。所示数据是每个处理6次测量的平均值。
实施例#1
A.使用上述的咪唑啉A、矿物油和非离子表面活性剂的混合物进行多次TAD织物剥离实验。将非离子表面活性剂的含量保持恒定为20％，并将咪唑啉A和矿物油的量在0％-80％间变化。测试在60mg/m2和120mg/m2添加水平下所述混合物的TAD织物剥离。
B.完成第二套实验，其中混合物中非离子表面活性剂的量为10％并保持不变。咪唑啉A和矿物油的量在0％-90％间变化。使用上述测试方法测试在60mg/m2和120mg/m2添加水平下所述混合物的TAD织物剥离。
C.进行第三套实验，其中混合物中非离子表面活性剂的量为4％并保持不变。咪唑啉A和矿物油的量在0％-96％间变化。使用上述测试方法测试在60mg/m2和120mg/m2添加水平下所述混合物的TAD织物剥离。
表1A、1B和1C
表1A.PEG 400DO–20％
表1B.PEG 400DO–10％
表1C.PEG 400DO–4％
对于与固定量的表面活性剂混合的各组分，可以看出，在TAD织物剥离测试中，咪唑啉A比矿物油更有效。咪唑啉A的粘附力值比矿物油的粘附力值更低。从以上的实施例还可以观察到，在这三种测试情况中，咪唑啉A与矿物油的混合物都比咪唑啉A本身更有效。
例如，在具有20％表面活性剂的系列中，具有80％的咪唑啉A的混合物和具有80％的矿物油的混合物的粘附力值分别为14.55N和19.48N。因此，对于包含40％的咪唑啉A和40％的矿物油的混合物，可能预期粘附力值为约17.02N。实际上粘附力值为11.94N，其比预期值低29.8％。类似地，在具有4％的表面活性剂的系列中，对于96％的咪唑啉A和96％的矿物油，粘附力值分别为17.56N和25.31N。对于包含64％的咪唑啉A和32％的矿物油的混合物，粘附力值为15.42N，其比单个组分的预期粘附力值低20.3％。当与较低效率的组分矿物油混合时，咪唑啉的性能的增强是完全出乎意料的。
还可以看出，观察到织物剥离的增强的咪唑啉A和矿物油的百分比范围根据是否使用表面活性剂和表面活性剂的量而变化。将增强范围定义为与单独使用咪唑啉A相比较，具有较低的粘附力的矿物油和咪唑啉A的混合物的％范围。例如，对于具有20％的表面活性剂的配制物，在20％-60％的咪唑啉A范围内有织物剥离的增强；对于具有10％的表面活性剂的配制物，在30％-75％的咪唑啉A的范围内有织物剥离的增强；以及对于具有4％的表面活性剂的配制物，在48％-80％的咪唑啉A的范围内有织物剥离的增强。总之，在包含约20％-约80％的咪唑啉A的配制物的范围内观察到织物剥离的增强。当配制物包含约40％-约75％的咪唑啉A时，看到额外的增强。
实施例#2
使用三个配制物在TAD织物剥离测试仪上进行对比测试。结果见表2。受试样品是未处理的对照，根据本发明制备产品B，其是包含咪唑啉A、矿物油和非离子表面活性剂的三组分配制物。然后对矿物油/表面活性剂以及聚α-烯烃/表面活性剂的双组份配制物进行测试。测试结果证明，在粘附力降低上，具有咪唑啉A组分的产品B明显胜过矿物油和聚α-烯烃的配制物。
表2
虽然已经使用特定实施方案描述了本发明，但是对它的很多其它形式和变型对于本领域技术人员而言是显而易见的。在本申请中所描述的本发明通常应当被解释为包括各种形式和变型，它们均落入本发明的范围内。

Claims (10)

1.一种组合物的用途，所述组合物包含：
a)一种或多种疏水季铵化氨基酰胺；
b)不同于氨基酰胺的至少一种疏水组分；以及
c)一种或多种非离子表面活性剂；
其中所述一种或多种疏水季铵化氨基酰胺是低分子量咪唑啉、非环状氨基酰胺季铵盐、或它们的混合物，并占整个组合物的40重量％-75重量％；以及
其中所述至少一种疏水组分是矿物油、植物油、硅油、聚α-烯烃和/或它们的混合物，并且占整个组合物的5重量％-40重量％；以及
所述非离子表面活性剂是二醇和/或其酯；脂肪酸的单酯和二酯；和/或它们的混合物，并且占整个组合物的10重量％-30重量％，
其中所述组合物用于降低湿薄纸与热风穿透干燥(TAD)织物表面的粘附力。
2.权利要求1所述的用途，其中所述疏水季铵化氨基酰胺是具有以下式I的结构的低分子量咪唑啉：
或
具有以下式II的结构的非环状氨基酰胺：
以及它们的混合物；
其中
R1为直链或支链的、饱和或不饱和的C12-C22脂族基团；
R2为甲基或乙基；以及
X为抗衡离子。
3.权利要求2所述的用途，其中所述抗衡离子是乙基硫酸根或甲基硫酸根。
4.权利要求2所述的用途，其中R1为直链或支链的、饱和或不饱和的C16-C18脂族基团。
5.权利要求1或2所述的用途，其中所述至少一种疏水组分是矿物油、植物油、或它们的组合物。
6.权利要求1所述的用途，其中所述非离子表面活性剂占整个组合物的小于40重量％。
7.权利要求1所述的用途，其中所述低分子量咪唑啉为10％-90％环化的。
8.权利要求1所述的用途，其中所述非离子表面活性剂选自油酸、硬脂酸和棕榈酸的二醇二酯。
9.降低薄纸纸幅和织物表面之间的粘附力的方法，所述方法包括：
-提供包含以下组分的组合物：
a)多种疏水环状和/或直链季铵化氨基酰胺；
b)不同于氨基酰胺的至少一种疏水组分；以及
c)一种或多种非离子表面活性剂；
其中所述疏水环状和/或直链季铵化氨基酰胺是低分子量咪唑啉、非环状氨基酰胺季铵盐、或它们的混合物，并且占整个组合物的40重量％-75重量％；
其中所述至少一种疏水组分是矿物油、植物油、硅油、聚α-烯烃和/或它们的混合物，并且占整个组合物的5重量％-40重量％；且
其中所述非离子表面活性剂是二醇和/或其酯，脂肪酸的单酯和二酯，和/或它们的混合物，并且占整个组合物的10重量％-30重量％；以及
-向织物表面施加所述组合物，
其中所述织物表面是热风穿透干燥机(TAD)的织物表面。
10.权利要求9所述的方法，其中将所述组合物通过喷涂施加到所述织物表面。
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