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CN117026515A - 一种美妆用途的高亲水无纺布的制备方法 - Google Patents

一种美妆用途的高亲水无纺布的制备方法 Download PDF

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CN117026515A
CN117026515A CN202311010622.8A CN202311010622A CN117026515A CN 117026515 A CN117026515 A CN 117026515A CN 202311010622 A CN202311010622 A CN 202311010622A CN 117026515 A CN117026515 A CN 117026515A
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carboxymethyl cellulose
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陈连节
范龙雪
谢红萍
陆宏斌
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Chen Lianjie
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Zhejiang Longteng New Materials Co ltd
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Abstract

本发明提供一种美妆用途的高亲水无纺布的制备方法，包括将羧甲基纤维素纤维与热塑性纤维共混后铺网、梳理、复合、热轧制成无纺布。本发明制备的美妆用途的高亲水无纺布克重为10g/m2～45g/m2，吸液倍率＞10倍，吸液性良好的同时，机械性能也十分优异，可加工性强，吸液后无纺布的形态也不易改变，可作为面膜基材应用于美妆领域。控制无纺布中羧甲基纤维素纤维的添加比优选为35％～65％、热塑性纤维的添加比优选为35％～65％，控制无纺布密度为0.15g/cm3～0.4g/cm3，选择羧甲基纤维素取代度为0.2～0.55的羧甲基纤维素纤维，三者相辅相成，可有效解决无纺布吸液后羧甲基纤维素纤维水溶从无纺布脱落的问题，同时无纺布柔软质轻，肤感好。

Description

一种美妆用途的高亲水无纺布的制备方法
技术领域
本发明属于无纺布技术领域，具体涉及一种美妆用途的高亲水无纺布的制备方法。
背景技术
羧甲基纤维素是纤维素经羧甲基化后制成的一类纤维素醚，有良好的生物相容性和高吸湿性，其水溶液具有增稠、成膜、黏接、水分保持、胶体保护、乳化及悬浮等作用，广泛应用于石油、食品、医药、纺织和造纸等行业。羧甲基纤维素纤维遇水成凝胶，其中大量羟基(-OH)及羧基(-COOH)赋予纤维独特的亲水性能，制成面膜纸可负载大量的水分，延长使用时间，使肌肤保湿更持久。此外，羧甲基纤维素成凝胶后可作为功能性添加剂(如玻尿酸、维生素E等)的载体，与功能性添加剂相容性好，功能性添加剂得以有效释放，可帮助功能性添加剂渗透入皮肤。
但是，羧甲基纤维素纤维机械性能差，遇水后纤维基本无强度，空间成型效果差，并且，单纯采用羧甲基纤维素纤维制成无纺布可加工性能差，成本也高；不含羧甲基纤维素纤维的无纺布，亲水性能差、无凝胶，不利于应用在美妆用膜布基材方面。
发明内容
为解决现有技术存在的问题，本发明提供一种美妆用途的高亲水无纺布的制备方法，实现无纺布吸液量大的同时又机械性能良好的发明目的。
为解决以上技术问题，本发明采用以下技术方案：
一种美妆用途的高亲水无纺布的制备方法，包括以下步骤：
S1、将羧甲基纤维素纤维与热塑性纤维共混，得混合纤维；
S2、混合纤维进入铺网机横向纵向交叉折叠5层后送入主梳理机梳理；
S3、梳理后引入纤网传送帘，再进行三层复合，喂入热辊进行热轧，制成具有一定克重的高亲水无纺布。
优选的，所述热塑性纤维为涤纶、腈纶、锦纶、氨纶、丙纶、聚乳酸(PLA)纤维、ES纤维中的一种或多种。
优选的，按质量百分比计，所述羧甲基纤维素纤维的添加比优选为35％～65％，所述热塑性纤维的添加比优选为35％～65％。
优选的，所述羧甲基纤维素纤维的线密度为0.8dtex～2.0dtex、长度为1.5cm～10.0cm；所述热塑性纤维线密度为0.8dtex～2.0dtex、长度为1.5cm～10.0cm。
优选的，所述热轧温度为130℃～260℃，热辊压力为0.5MPa～2MPa。
优选的，所述高亲水无纺布的克重10g/m2～45g/m2，吸液倍率＞10倍，密度为0.15g/cm3～0.4g/cm3。
为了使无纺布同时具有良好的吸液性和优异的机械性能，申请人进行了大量试验，并且在研究过程中发现，制备的高亲水无纺布作为面膜基材在吸液时，主要起吸液作用的是羧甲基纤维素纤维。但令人意外的是，大量吸液后的高亲水无纺布会出现羧甲基纤维素纤维水溶脱落的现象，而羧甲基纤维素纤维承载了大量的水分和精华液，脱落后面膜基材不均匀，使护肤、保湿效果大打折扣，造成精华液的浪费。
为了避免羧甲基纤维素纤维吸液后从无纺布脱落，申请人继续研究，并总结出影响羧甲基纤维素纤维吸液后与无纺布结合效果的三点因素，具体如下：
(1)高亲水无纺布中羧甲基纤维素纤维和热塑性纤维的比例
当混合纤维从主梳理机进入热轧机上下热辊进行热轧，依靠热辊的压力和温度将纤维融化加固，热辊带有轧点，轧点处温度使热塑性纤维融化，使得纤维与纤维之间发生粘连形成无纺布，热塑性纤维粘合后在无纺布中呈“脉络”状限制羧甲基纤维素纤维吸液后的溶胀。同时，热塑性纤维的添加比例对无纺布的性能有重大影响，当热塑性纤维占比过小时，混合纤维难以热轧为无纺布；当热塑性纤维占比过大时，作为美妆用途的无纺布在使用时挺硬，肤感较差，因此，按质量百分比计，所述羧甲基纤维素纤维的添加比优选为35％～65％，所述热塑性纤维的添加比优选为35％～65％。
(2)高亲水无纺布的密度
当高亲水无纺布密度过大时，无纺布中的“脉络”之间的空间很小，吸液时水分无法渗入布料中，羧甲基纤维素纤维无法溶胀，布料遇水挺硬，肤感不好；当密度过小时，无纺布“脉络”结构对羧甲基纤维素纤维的束缚较小，超出羧甲基纤维素纤维溶胀极限时羧甲基纤维素纤维会发生水溶，受重力影响导致羧甲基纤维素水溶液从布料上流走，因此无纺布的密度设计为0.15g/cm3～0.4g/cm3。
(3)羧甲基纤维素纤维中羧甲基纤维素的取代度
取代度是指纤维素分子中平均每个葡萄糖环上的羟基(-0H)通过醚键被钠甲基(-CH2COONa)取代的数目。若羧甲基纤维素取代度太高，羧甲基纤维素纤维的吸液量太大，而羧甲基纤维素溶胀-溶解的区间太窄，满足无纺布中纤维比例以及密度的条件下，无纺布中的“脉络”结构依然对无纺布中羧甲基纤维素纤维的束缚不足，超出羧甲基纤维素纤维溶胀极限时，会发生水溶从无纺布上脱落；取代度太低，吸液性差，布料遇水挺硬，肤感较差。
设计无纺布中羧甲基纤维素纤维和热塑性纤维的添加比例和无纺布的密度，利用热塑性纤维热轧形成的“脉络”结构对羧甲基纤维素纤维的溶胀空间进行限定，实现大量吸液后羧甲基纤维素纤维溶胀不溶解。因此在无纺布中热塑性纤维的添加比优选为35％～65％、无纺布密度为0.15g/cm3～0.4g/cm3的前提下，选择羧甲基纤维素取代度为0.2～0.55的羧甲基纤维素纤维，三者相辅相成，可有效解决无纺布吸液后羧甲基纤维素纤维水溶从无纺布脱落的问题。
由于采用了上述技术方案，本发明达到的技术效果是：
1、本发明制备的美妆用途的高亲水无纺布将羧甲基纤维素纤维与热塑性纤维混合后热轧，无纺布吸液倍率＞10倍，吸液性良好的同时，机械性能也十分优异，可加工性强，吸液后无纺布的形态也不易改变，可作为面膜基材应用于美妆领域。
2、控制无纺布中羧甲基纤维素纤维的添加比优选为35％～65％、热塑性纤维的添加比优选为35％～65％，控制无纺布密度为0.15g/cm3～0.4g/cm3，选择羧甲基纤维素取代度为0.2～0.55的羧甲基纤维素纤维，三者相辅相成，可有效解决无纺布吸液后羧甲基纤维素纤维水溶从无纺布脱落的问题，同时无纺布柔软质轻，肤感好。
具体实施方式
下面结合具体的实施例，进一步阐述本发明。
实施例1一种美妆用途的高亲水无纺布的制备方法，包括以下步骤：
S1、按质量百分比计，将55％的羧甲基纤维素纤维与45％的丙纶纤维共混，得混合纤维。
S2、混合纤维进入铺网机横向纵向交叉折叠5层后送入主梳理机梳理；
S3、梳理后引入纤网传送帘，再进行三层复合，喂入热辊进行热轧，制成具有一定克重的高亲水无纺布。
所述S1中羧甲基纤维素纤维的线密度为1.5dtex、长度为3.5cm；所述热塑性纤维线密度为1.5dtex、长度为3.5cm。
所述S3中热轧温度为170℃，热辊压力为0.9MPa。
所述高亲水无纺布的克重25g/m2，吸液倍率为12倍，密度为0.3g/cm3。
所述羧甲基纤维素纤维中羧甲基纤维素的取代度为0.37。
实施例2一种美妆用途的高亲水无纺布的制备方法，包括以下步骤：
S1、按质量百分比计，将35％的羧甲基纤维素纤维与65％的涤纶纤维共混，得混合纤维。
S2、混合纤维进入铺网机横向纵向交叉折叠5层后送入主梳理机梳理；
S3、梳理后引入纤网传送帘，再进行三层复合，喂入热辊进行热轧，制成具有一定克重的高亲水无纺布。
所述S1中羧甲基纤维素纤维的线密度为0.8dtex、长度为1.5cm；所述热塑性纤维线密度为0.8dtex、长度为1.5cm。
所述S3中热轧温度为260℃，热辊压力为2MPa。
所述高亲水无纺布的克重45g/m2，吸液倍率为10.5倍，密度为0.4g/cm3。
所述羧甲基纤维素纤维中羧甲基纤维素的取代度为0.2。
实施例3一种美妆用途的高亲水无纺布的制备方法，包括以下步骤：
S1、按质量百分比计，将65％的羧甲基纤维素纤维与35％的锦纶纤维共混，得混合纤维。
S2、混合纤维进入铺网机横向纵向交叉折叠5层后送入主梳理机梳理；
S3、梳理后引入纤网传送帘，再进行三层复合，喂入热辊进行热轧，制成具有一定克重的高亲水无纺布。
所述S1中羧甲基纤维素纤维的线密度为2.0dtex、长度为10.0cm；所述热塑性纤维线密度为2.0dtex、长度为10.0cm。
所述S3中热轧温度为220℃，热辊压力为0.5MPa。
所述高亲水无纺布的克重10g/m2，吸液倍率为14倍，密度为0.15g/cm3。
所述羧甲基纤维素纤维中羧甲基纤维素的取代度为0.55。
对比例1
选择具有代表性的实施例1，改为选用羧甲基纤维素的取代度为0.1的羧甲基纤维素纤维，其余均与实施例1一致。
对比例2
选择具有代表性的实施例1，改为选用羧甲基纤维素的取代度为0.7的羧甲基纤维素纤维，其余均与实施例1一致。
对比例3
选择具有代表性的实施例1，控制高亲水无纺布的密度为0.05g/cm3，其余均与实施例1一致。
对比例4
选择具有代表性的实施例1，控制高亲水无纺布的密度为0.5g/cm3，其余均与实施例1一致。
对实施例和对比例中无纺布的吸液倍率进行检测，并进行对比，具体见表1。
表1
注：所述吸液倍率的检测方法为：
1、将已知质量的5cm*5cm无纺布样品置于培养皿内。
2、加入预热至(37±1)℃的试验液(试验液为水)，其质量为供试材料的40倍(±5g)。
3、移入干燥箱内，在(37±1)℃下保持30min。
4、用镊子夹持样品一角或一端，悬垂30s后，称重。
5、吸液倍率＝吸液后重量/吸液前重量。
除非特殊说明，本发明所述比例，均为质量比例，所述百分比，均为质量百分比；原料均为市购。
最后应说明的是：以上所述仅为本发明的优选实施例，并不用于限制本发明，尽管参照前述实施例对本发明进行了详细说明，对于本领域的技术人员来说，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (7)

1.一种美妆用途的高亲水无纺布的制备方法，其特征在于，所述制备方法包括以下步骤：
S1、将羧甲基纤维素纤维与热塑性纤维共混，得混合纤维；
S2、混合纤维进入铺网机横向纵向交叉折叠5层后送入主梳理机梳理；
S3、梳理后引入纤网传送帘，再进行三层复合，喂入热辊进行热轧，制成具有一定克重的高亲水无纺布。
2.根据权利要求1所述的一种美妆用途的高亲水无纺布的制备方法，其特征在于，所述热塑性纤维为涤纶、腈纶、锦纶、维纶、氨纶、丙纶、聚乳酸纤维、ES纤维中的一种或多种。
3.根据权利要求1所述的一种美妆用途的高亲水无纺布的制备方法，其特征在于，按质量百分比计，所述羧甲基纤维素纤维的添加比为35％～65％，所述热塑性纤维的添加比为35％～65％。
4.根据权利要求1所述的一种美妆用途的高亲水无纺布的制备方法，其特征在于，所述羧甲基纤维素纤维的线密度为0.8dtex～2.0dtex、长度为1.5cm～10.0cm；所述热塑性纤维线密度为0.8dtex～2.0dtex、长度为1.5cm～10.0cm。
5.根据权利要求1所述的一种美妆用途的高亲水无纺布的制备方法，其特征在于，所述热轧温度为130℃～260℃，热辊压力为0.5MPa～2MPa。
6.根据权利要求1所述的一种美妆用途的高亲水无纺布的制备方法，其特征在于，所述高亲水无纺布的克重10g/m2～45g/m2，吸液倍率＞10倍，密度为0.15g/cm3～0.4g/cm3。
7.根据权利要求1所述的一种美妆用途的高亲水无纺布的制备方法，其特征在于，所述羧甲基纤维素纤维中羧甲基纤维素的取代度为0.2～0.55。
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CN101790604A (zh) * 2007-06-22 2010-07-28 尤妮佳股份有限公司 无纺织物及其制造方法
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