CN108642711B - 一种高蓬松无纺布的制备方法及无纺布 - Google Patents

一种高蓬松无纺布的制备方法及无纺布 Download PDF

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CN108642711B
CN108642711B CN201810400649.0A CN201810400649A CN108642711B CN 108642711 B CN108642711 B CN 108642711B CN 201810400649 A CN201810400649 A CN 201810400649A CN 108642711 B CN108642711 B CN 108642711B
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孙瑜
曹秀明
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Sunshine Health Medical Technology Jiangyin Co ltd
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Abstract

本发明公开了一种高蓬松无纺布的制备方法,包括以下步骤:S1,配置生产无纺布的混合纤维;S2,清花、梳理、铺网,得纤维网;S3,对S2所得纤维网进行水刺处理;S4,烘干,得到无纺布成品;混合纤维的主要组成为第一纤维和第二纤维,其中,第一纤维为天然纤维和/或合成纤维,第二纤维为Optim Max纤维。通过向无纺布中引入Optim Max纤维,在水刺处理后,无纺布中的Optim Max纤维与第一纤维发生缠结,利用纤维的收缩率差,使得Optim Max之间的第一纤维呈现拱起或弯曲状态,纤维间隙增加导致无纺布容积增加,干燥后的无纺布成高蓬松状态,手感柔软。

Description

一种高蓬松无纺布的制备方法及无纺布
技术领域
本发明属于无纺布技术领域,具体涉及一种高蓬松无纺布的制备方法及无纺布。
背景技术
水刺无纺布是将高压微细水流喷射到一层或多层纤维网上,使纤维相互缠结在一起,从而使纤网得以加固而具备一定强力,得到的织物即为水刺无纺布。其纤维原料来源广泛,可以是涤纶、锦纶、丙纶、粘胶纤维、甲壳素纤维、超细纤维、天丝、蚕丝、竹纤维、木浆纤维、海藻纤维等。与针刺无纺布相比,水刺无纺布的克重较小,适于用作美容耗材如面膜和医用敷料。
现有技术中的无纺布湿巾纸按照表面形态分为两种,一种是平滑形的,一种是压印出凹凸状表面的,凹凸表面更有助于污渍的擦拭,卸妆棉同理,而且持水效果优于平滑表面的无纺布湿巾纸,但相较而言,具有凹凸状表面的无纺布克重通常大于平滑表面的无纺布。改进的蓬松无纺布如CN104562452A中公开的,该无纺布为包括表面层与底层的双层结构,所述表面层由 95%以上的纤维表面熔点小于140° C 的双组分纤维组成和小于 5%的纤维表面熔点大于 140℃的纤维组成;而所述底层由30-90%的纤维表面熔点小于 140℃的 双组分纤维和 10-70%的纤维表面熔点大于 140℃的纤维组成;所述表面层与底层经热风复合而成无纺布。利用烘干步骤热风温度高于140℃,表面层中双组份纤维含量较高,纤维粘结点数量多,组成具有滑爽细腻的表面层,而底层中未熔融的单组份纤维可以有效减少粘结点,从而形成具有厚实感,毛绒蓬松的底层。但是,粘接点的增加会导致无纺布的柔软程度下降,影响无纺布的手感,而且烘干时间和烘干温度的控制须严格。
发明内容
本发明的目的之一在于克服现有技术中存在的缺陷,提供一种高蓬松无纺布的制备方法,Optim Max纤维水刺状态下成吸湿伸长状态,湿热条件下水刺和后续的烘干,可使Optim Max纤维长度收缩甚至超收缩,干燥无纺布中与Optim Max纤维发生缠结的其他纤维成弯曲状态,无纺布手感蓬松。
为实现上述目的,本发明的技术方案为:一种高蓬松无纺布的制备方法,其特征在于,包括以下步骤:
S1,配置生产无纺布的混合纤维;
S2,清花、梳理、铺网,得纤维网;
S3,对S2所得纤维网进行水刺处理;
S4,烘干,得到无纺布成品;
其特征在于,所述混合纤维的主要组成为第一纤维和第二纤维,其中,第一纤维为天然纤维和/或合成纤维,第二纤维为Optim Max纤维。
采用第一纤维和Optim Max纤维混合,利用湿热处理后不同纤维之间的收缩程度不一,收缩率小的纤维由于受Optim Max纤维的缠结影响呈现拱起或者弯曲状态,由于纤维本身的刚性和韧性,干燥状态下无纺布呈现蓬松状态,不存在纤维之间的固定连接点,因此手感爽滑,持水性能良好。
优选的技术方案为,混合纤维包括横定向混合纤维和纵定向混合纤维,横定向混合纤维和纵定向混合纤维在纤维网中的纤维延伸方向垂直或者近似垂直;横定向混合纤维和纵定向混合纤维的组成一致;或者横定向混合纤维为天然纤维和/或合成纤维,纵定向混合纤维由第一纤维和第二纤维混合而成。前一并列方案中横向收缩和纵向收缩趋于一致,后一并列方案中横向长度基本不变,纵向收缩明显,因此无纺布面具有若干同向的凸起纹路。
优选的技术方案为,纵定向混合纤维中第二纤维的含量为5-15%。纵定向混合纤维含量过低,则缠结点受天然纤维和/或合成纤维影响较大,收缩不明显;纵定向混合纤维含量过高,则整个无纺布布面收缩率过大,布面纤维间隙小,无纺布趋于致密,手感和持水性能均下降。
为了优化Optim Max纤维的回缩率,优选的技术方案为,S2和S3之间还包括预烘和静置步骤,预烘后无纺布半成品的带液率为35-50%,静置工艺条件为:温度35-45℃,常压,静置环境相对湿度70-60%,时长36-72h。
优选的技术方案为,第一纤维为棉纤维,高蓬松无纺布的克重为20-45g/m2。进一步优选,棉纤维为长绒棉纤维。高蓬松无纺布中还可以加入水溶性维纶,水刺处理后增加退维步骤,使无纺布更趋蓬松。
优选的技术方案为,烘干温度为90-100℃。Optim Max纤维为经牵伸处理的羊毛纤维,烘干温度过高对Optim Max纤维损伤大,不利于纤维的回缩。
优选的技术方案为,S3中用于水刺的高速喷射水流组成中包含渗透剂,所述渗透剂为中性渗透剂,水流的温度为25-30℃。渗透剂的作用在于使水渗入至Optim Max纤维内部,使纤维充分溶胀,有助于湿热处理后收缩率的进一步提高。中性渗透剂不会致使喷头堵塞。
优选的技术方案为,渗透剂由脂肪醇聚氧烷基醚和乙醇组合而成,脂肪醇聚氧烷基醚与乙醇的重量比为1:(3-6),高速喷射水流中渗透剂的重量百分比为4-8%。脂肪醇聚氧烷基醚和乙醇同时使用,兼具降低水溶液表面张力和羊毛脱脂,同时所得水体低泡,不影响高速水流的正常喷射。
本发明的目的之二在于提供一种高蓬松无纺布,其特征在于,由权利要求1只8中任意一项所述的高蓬松无纺布的制备方法制得。
本发明的目的之三在于提供高蓬松无纺布的应用,其特征在于,包括高蓬松无纺布在面膜、卸妆棉、干湿巾、医疗敷料中的应用。面膜的应用优势在于吸水和持水性能,卸妆棉、干湿巾的应用优势在于湿润后的无纺布具有凹凸表面,清洁效能增强。医疗敷料中可采用脱脂棉或者木棉纤维,应用优势在于触感温柔且快速吸收伤口创面渗出液。
本发明的优点和有益效果在于:
通过向无纺布中引入Optim Max纤维,在水刺处理后,无纺布中的Optim Max纤维与第一纤维发生缠结,由于第一纤维经过湿热处理后,不会收缩或者收缩率低,而OptimMax纤维收缩可达20-25%,甚至超收缩,使得Optim Max之间的第一纤维呈现拱起或弯曲状态,纤维间隙增加导致无纺布容积增加,干燥后的无纺布成高蓬松状态,手感柔软。
具体实施方式
下面结合实施例,对本发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案,而不能以此来限制本发明的保护范围。
天然纤维和/或合成纤维:包括但不限于已知的涤纶、锦纶、丙纶、粘胶纤维、甲壳素纤维、超细纤维、天丝、蚕丝、竹纤维、木浆纤维、海藻纤维。
实施例1
实施例1高蓬松无纺布的制备方法,包括以下步骤:
S1,配置生产无纺布的混合纤维;
S2,清花、梳理、铺网,得纤维网;
S3,对S2所得纤维网进行水刺处理;
S4,烘干,得到无纺布成品;
混合纤维的主要组成为第一纤维和第二纤维,其中,第一纤维为粘胶纤维,第二纤维为Optim Max纤维,两种纤维经过混合清花后,纤维方向呈随机状铺网。混合纤维中OptimMax纤维的重量百分比为30%。高蓬松无纺布的克重为30g/m2。烘干温度为130℃。
实施例2
实施例2与实施例1的区别在于,混合纤维包括横定向混合纤维和纵定向混合纤维,横定向混合纤维和纵定向混合纤维在纤维网中的纤维延伸方向垂直或者近似垂直;横定向混合纤维和纵定向混合纤维的组成一致;横定向混合纤维和纵定向混合纤维中第二纤维的含量为5%;烘干温度为100℃;第一纤维为棉纤维。
实施例3
实施例3与实施例2的区别在于,横定向混合纤维为天然纤维和/或合成纤维,纵定向混合纤维由第一纤维和第二纤维混合而成。
纵定向混合纤维中第二纤维的含量为15%,烘干温度为90℃。
实施例4中S2和S3之间还包括预烘和静置步骤,预烘后无纺布半成品的带液率为35%,静置工艺条件为:温度35℃,常压,静置环境相对湿度70-60%,时长72h。烘干温度为95℃。
实施例4
实施例4中S2和S3之间还包括预烘和静置步骤,预烘后无纺布半成品的带液率为50%,静置工艺条件为:温度45℃,常压,静置环境相对湿度70%,时长36h。
实施例5
实施例5与实施例4的区别在于S3中用于水刺的高速喷射水流组成中包含渗透剂,所述渗透剂为中性渗透剂,水流的温度为25-30℃。渗透剂由脂肪醇聚氧烷基醚在水体中的重量百分比为1%。
实施例6
渗透剂由脂肪醇聚氧烷基醚和乙醇组合而成,脂肪醇聚氧烷基醚与乙醇的重量比为1:3,高速喷射水流中渗透剂的重量百分比为4%。
实施例7
实施例7中脂肪醇聚氧烷基醚与乙醇的重量比为1:6,高速喷射水流中渗透剂的重量百分比为8%。
对比例
对比例1中的无纺布纤维仅为粘胶纤维,纤维方向随机。
对比例2中采用与实施例2相同的棉纤维作为横定向纤维和纵定向纤维。
性能对比:
将实施例和对比例所得试样分切成5*5cm的方块各五片,干燥后将方块叠合,不对层叠的无纺布施加格外的下压作用力,以对比例15片高度为1,高度比值=实施例或对比例2中5片叠合高度实测值/对比例1中5片叠合高度实测值。
高度比值见下表:
实施例1 实施例2 实施例3 实施例4 实施例5
高度比值 1.53 1.38 1.51 1.65 1.71
实施例6 实施例7 对比例1 对比例2
高度比值 1.69 1.70 1 1.06
实施例1的无纺布由于加入了过量的Optim Max纤维,手感偏硬;
实施例6和实施例7中加入了乙醇,不仅同时完成了羊毛的脱脂操作,还具有抑泡效果,无纺布纤维中存在少量气泡,增加清洗难度,但总体不影响高速水流的喷射。
适于美容医用敷料使用的高蓬松无纺布的克重为20-45g/m2,由于手感蓬松,因此克重趋小控制。
上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。

Claims (8)

1.一种高蓬松无纺布的制备方法,其特征在于,包括以下步骤:
S1,配置生产无纺布的混合纤维;
S2,清花、梳理、铺网,得纤维网;
S3,对S2所得纤维网进行水刺处理;
S4,烘干,得到无纺布成品;
其特征在于,所述混合纤维的主要组成为第一纤维和第二纤维,其中,第一纤维为天然纤维和/或合成纤维,第二纤维为Optim Max纤维;
S2和S3之间还包括预烘和静置步骤,预烘后无纺布半成品的带液率为35-50%,静置工艺条件为:温度35-45℃,常压,静置环境相对湿度70-60%,时长36-72h。
2.根据权利要求1所述的高蓬松无纺布的制备方法,其特征在于,混合纤维包括横定向混合纤维和纵定向混合纤维,横定向混合纤维和纵定向混合纤维在纤维网中的纤维延伸方向垂直或者近似垂直;横定向混合纤维和纵定向混合纤维的组成一致;或者横定向混合纤维为天然纤维和/或合成纤维,纵定向混合纤维由第一纤维和第二纤维混合而成。
3.根据权利要求2所述的高蓬松无纺布的制备方法,其特征在于,纵定向混合纤维中第二纤维的含量为5-15%。
4.根据权利要求3所述的高蓬松无纺布的制备方法,其特征在于,第一纤维为棉纤维,高蓬松无纺布的克重为20-45g/m2
5.根据权利要求1所述的高蓬松无纺布的制备方法,其特征在于,烘干温度为90-100℃。
6.根据权利要求5所述的高蓬松无纺布的制备方法,其特征在于,S3中用于水刺的高速喷射水流组成中包含渗透剂,所述渗透剂为中性渗透剂,水流的温度为25-30℃。
7.根据权利要求6所述的高蓬松无纺布的制备方法,其特征在于,渗透剂由脂肪醇聚氧烷基醚和乙醇组合而成,脂肪醇聚氧烷基醚与乙醇的重量比为1:(3-6),高速喷射水流中渗透剂的重量百分比为4-8%。
8.一种高蓬松无纺布,其特征在于,由权利要求1至7中任意一项所述的高蓬松无纺布的制备方法制得。
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