CN110353890A - 一种超吸水复合式芯体及其制造方法 - Google Patents
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- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
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- A61F2013/530708—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties
- A61F2013/530715—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties by the acquisition rate
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- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
- A61F2013/530708—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties
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Abstract
本发明公开了一种超吸水复合式芯体及其制造方法,所述复合式芯体从上到下依次包括面层、含超吸水纤维无纺布层、吸收芯体、PE透气底膜,吸收芯体由导流纤维和天然木浆纤维交叉编织成具有镂空网格的芯体单体交错叠加组成,无纺布层复合于吸收芯体上,且无纺布层的厚度沿吸收芯体的中部向两端逐步减小,芯体更薄,透气性更好,且吸水材料铺设更加均匀,吸水后整体膨胀,能够将液体均匀分散导入吸水层,在芯体中部铺洒更高密度的吸水性材料,具有超强的吸液能力和保液能力,可以将面层透过和导流下来的尿液快速吸收和贮藏起来,起到导流的尿液的作用,帮助尿液扩散,且不易反渗,保持表面干爽,整个复合式芯体手感柔软蓬松,具有良好肌肤触感。
Description
技术领域
本发明涉及卫生用品技术领域,具体的涉及一种超吸水复合式芯体及其制造方法。
背景技术
纸尿裤是一次性使用后即可抛弃的产品。以无纺布、卫生纸、绒毛浆、高分子吸水树脂、PE膜、橡皮筋等材料制成。有幼儿专用与成人专用两种。其中中国市场主要为婴儿纸尿裤,中国每年有近2000万的婴儿出生,使用尿裤的0岁至2岁的婴儿达到4000多万,巨大的人群需求量,对纸尿裤的市场来说,促使纸尿裤的快速发展。婴儿皮肤娇嫩,角质皮层很薄,防御功能较差,而且出汗多,擦伤后容易引起细菌感染。因此,婴儿纸尿裤要求柔软性极佳、无皮肤刺激性,不但能快速吸收尿液,还要柔软,整个产品的手感要柔软有弹性、无刺激性,不会伤害到宝宝幼嫩的肌肤,也需要符合宝宝生长的要求。
纸尿裤的吸收芯体基本分三种:一种是传统的芯体,采用绒毛浆加吸水树脂制成,导流效果好,但容易断层;第二种是采用无尘纸加无纺布加吸水树脂制成的复合芯体,不会出现断层现象,也不会起坨,但是吸收速度较慢;第三种叫半芯体,是以薄型的复合芯体下面再铺绒毛浆和吸水树脂制成,但业内认为其并不是一种成熟的工艺技术,而是为了缩减成本,降低工艺难度,同时保有复合芯体一些特点的替代方案。因此,市面上最常见的是采用复合芯体制成的纸尿裤。
在纸尿裤实际应用的过程中,尿液主要集中在裆部,但也有少部分会因婴儿俯卧/躺卧而流至前腰部/后腰部,所以裆部处的芯体吸收量要大,而前腰部和后腰部的芯体吸收速度要快。吸收量大便是需要更高密度的吸水树脂分布,然而复合芯体的制作是在大块的无尘纸与无纺布之间均匀铺洒吸水树脂,然后按纸尿裤的大小来确定芯体尺寸并进行切割,所以无法做到将芯体中部铺洒更高密度的吸水性材料,存在以下问题:1、表面干爽度差,由于婴儿皮肤娇嫩,长时间穿着不干爽的纸尿裤容易使婴儿皮肤造成过敏,从而患上尿布疹;2、只能够起到吸附性的作用,并不能够做到更好的透气效果,在不透气的情况下,会造成人体皮肤的溃烂;3、导流层无法将液体均匀分散导入吸水层,使液体集中在吸水层的某一区域,导致吸水层的吸水材料形成一坨,不利于吸水层吸水。
发明内容
本发明的目的在于克服现有技术中存在的技术问题,提供一种超吸水复合式芯体及其制造方法。
为实现上述目的,本发明采用的技术方案如下:一种超吸水复合式芯体,所述复合式芯体从上到下依次包括面层、含超吸水纤维无纺布层、吸收芯体、PE透气底膜,所述吸收芯体由导流纤维和天然木浆纤维交叉编织成具有镂空网格的芯体单体交错叠加组成,所述含超吸水纤维无纺布层复合于吸收芯体上,且含超吸水纤维无纺布层的厚度沿吸收芯体的中部向两端逐步减小。
进一步的,所述含超吸水纤维无纺布层包括聚羧酸类吸水纤维、丙烯酸系吸水纤维、聚丙烯腈吸水纤维、聚乙烯醇类吸水纤维、改性聚乙烯醇类吸水纤维、纯海藻酸盐类吸水纤维中的至少一种吸水纤维或其任意组合。
进一步的,所述含超吸水纤维无纺布层的厚度为1~5mm。
进一步的,所述镂空网格中结合有活性炭、沸石、茶多酚中的一种或多种。
进一步的,所述导流纤维的重量比为30~60%,所述然木浆纤维的重量比为40~70%。
进一步的,所述芯体单体包括三层,所述中间层芯体单体位于上下两层芯体单体的中部,且中间层芯体单体的长度小于上下两层芯体单体的长度。
进一步的,所述芯体单体的厚度为1~2mm,所述吸收芯体的厚度为3-6mm。
进一步的,所述面层为3D珍珠棉。
一种超吸水复合式芯体的制备方法,其特征在于,所述方法包括:
将导流纤维和天然木浆纤维混合后交叉编织成具有镂空网格的单体,通过热风穿透将芯体单体粘合交错叠加形成吸收芯体;
将含超吸水纤维无纺布层复合于吸收芯体上;
将面层、复合有含超吸水纤维无纺布层的吸收芯体、PE透气底膜顺次通过热熔胶固定连接形成超吸水复合式芯体。
进一步的,在吸收芯体上添加活性炭、沸石、茶多酚中的一种或多种。
由上述对本发明的描述可知,与现有技术相比,本发明提供的一种超吸水复合式芯体及其制造方法,木浆纤维具有超强的吸水功能和超强的锁水效应,能够起到吸附性作用,并且吸收芯体由导流纤维和天然木浆纤维交叉编织成具有镂空网格的芯体单体交错叠加组成,使得芯体更薄,透气性更好,且吸水材料铺设更加均匀,将含超吸水纤维无纺布层复合于吸收芯体上,吸水后整体膨胀,能够将液体均匀分散导入吸水层,不会导致吸水材料形成一坨,产品不易变形,含超吸水纤维无纺布层的厚度沿吸收芯体的中部向两端逐步减小,可以在芯体中部铺洒更高密度的吸水性材料,具有超强的吸液能力和保液能力,可以将面层透过和导流下来的尿液快速吸收和贮藏起来,起到导流的尿液的作用,帮助尿液扩散,且不易反渗,保持表面干爽,有效的阻隔尿液与宝宝幼嫩的皮肤接触,有效减少婴儿使用纸尿裤导致过敏的几率,整个复合式芯体手感柔软蓬松,具有良好肌肤触感。
附图说明
图1为本发明超吸水复合式芯体结构示意图;
图2为本发明吸收芯体结构示意图;
图3为图2局部放大图;
图4为本发明超吸水复合式芯体的制备方法流程图;
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
如图1所示,本实施例提供一种超吸水复合式芯体,所述复合式芯体从上到下依次包括面层1、含超吸水纤维无纺布层2、吸收芯体3、PE透气底膜4,
所述面层1采用3D珍珠棉,3D珍珠棉亲肤柔软、通气;
所述含超吸水纤维无纺布层2包括聚羧酸类吸水纤维、丙烯酸系吸水纤维、聚丙烯腈吸水纤维、聚乙烯醇类吸水纤维、改性聚乙烯醇类吸水纤维、纯海藻酸盐类吸水纤维中的至少一种吸水纤维或其任意组合,超吸水纤维的高分子结构由主链骨架、吸水基团和交联基团等构成,通过交联技术形成三维网状结构,具有大的比表面积及微孔结构,从而体现了出了优越的吸水能力、保液性能和溶胀特性,吸水速度快,超吸水性纤维含有-COOH、-COONa、-CONH2和/或-OH吸水基团,在本实施例中采用聚丙烯腈吸水纤维,聚丙烯腈吸水纤维吸水后,立体网中的亲水性基团通过氢键作用将水牢牢的锁在各个网孔内,且聚丙烯腈吸水纤维制备方便,以聚丙烯腈半成品为原料进行碱性水解反应,然后在甘油水溶液中进行酯化,可以制备得到聚丙烯腈吸水纤维,吸水倍率达到42(g/g)。由于超吸水纤维具有大的长径比,还可与其他纤维进行复合,例如与PE/PET纤维进行复合,可以将75%聚丙烯腈吸水纤维与25%PE/PET纤维复合而成无纺布,所述含超吸水纤维无纺布层的厚度为1~5mm,且厚度沿吸收芯体的中部向两端逐步减小;
如图2、图3所示,所述吸收芯体3由导流纤维和天然木浆纤维交叉编织成具有镂空网格的芯体单体交错叠加组成,使得芯体更薄,透气性更好,且吸水材料铺设更加均匀,所述导流纤维的重量比为30~60%,所述然木浆纤维的重量比为40~70%,在本实施例中导流纤维采用PE/PET复合纤维,PE/PET复合纤维具有足够抗拉伸强度的同时亲水性好,木浆纤维具有超强的吸水功能和超强的锁水效应,能够起到吸附性作用,在本实施例中,PE/PET复合纤维的重量比是25%,木浆纤维的重量比是75%,这样PE/PET复合纤维与木浆纤维混合后具有良好的挺度、芯体稳定性增强,不会起坨,并且将含超吸水纤维无纺布层复合于吸收芯体3上,使得吸收芯体3吸水后整体膨胀,能够将液体均匀分散导入吸水层,不会导致吸水材料形成一坨,产品不易变形,所述芯体单体包括三层,所述中间层芯体单体位于上下两层芯体单体的中部,且中间层芯体单体的长度小于上下两层芯体单体的长度,所述芯体单体的厚度为1~2mm,所述吸收芯体的厚度为3-6mm,在芯体中部铺洒了更高密度的吸水性材料,具有超强的吸液能力和保液能力,可以将面层透过和导流下来的尿液快速吸收和贮藏起来,起到导流的尿液的作用,帮助尿液扩散,且不易反渗,保持表面干爽,有效的阻隔尿液与宝宝幼嫩的皮肤接触,有效减少婴儿使用纸尿裤导致过敏的几率,还可以在镂空网格中结合有活性炭、沸石、茶多酚等,在本实施例中添加活性炭,活性炭可吸收尿液分解产生的尿素,从而有效抑制细菌增长,防止湿疹。
所述PE透气底膜4具有防潮性大、透湿性小和良好的透气性,能排除闷热湿气,外层干爽且不粘手,有预防宝宝红屁屁,通过四层复合之后,整个复合式芯体手感柔软蓬松,具有良好肌肤触感。
如图4所示,本实施例还一种超吸水复合式芯体的制备方法,所述方法包括以下步骤:
S1:将导流纤维和天然木浆纤维混合后交叉编织成具有镂空网格的芯体单体,通过热风穿透将芯体单体粘合交错叠加形成吸收芯体;
S2:在吸收芯体上添加活性炭;
S3:将含超吸水纤维无纺布层复合于吸收芯体上;
S4:将面层、复合有含超吸水纤维无纺布层的吸收芯体、PE透气底膜顺次通过热熔胶固定连接形成超吸水复合式芯体。
具体如下:准备PE/PET复合纤维和木浆纤维,且PE/PET复合纤维的重量比是25%,木浆纤维的重量比是75%,将PE/PET复合纤维和木浆纤维混合后交叉编织具有镂空网格的单体,芯体单体包括三层,中间层芯体单体位于上下两层芯体单体的中部,且中间层芯体单体的长度小于上下两层芯体单体的长度,经热风粘合机构进行热风穿透,通过PE/PET复合纤维在加热过程中产生的热粘合作用将三层芯体单体交错粘合叠加形成吸收芯体;在此过程中,可以控制热风穿透温度130℃左右,车间的湿度范围在35%左右,准备含超吸水纤维无纺布层,以聚丙烯腈半成品为原料进行碱性水解反应,然后在甘油水溶液中进行酯化,得到聚丙烯腈吸水纤维,其中聚丙烯腈吸水纤维的厚度沿吸收芯体的中部向两端逐步减小,将含超吸水纤维无纺布层复合于吸收芯体上,复合时,可采用热风穿透粘合,也可使用热熔胶进行复合,将面层、复合有含超吸水纤维无纺布层的吸收芯体、PE透气底膜顺次通过热熔胶固定连接形成超吸水复合式芯体。
由上述对本发明的描述可知,与现有技术相比,本发明提供的一种超吸水复合式芯体及其制造方法,木浆纤维具有超强的吸水功能和超强的锁水效应,能够起到吸附性作用,并且吸收芯体由导流纤维和天然木浆纤维交叉编织成具有镂空网格的芯体单体交错叠加组成,使得芯体更薄,透气性更好,且吸水材料铺设更加均匀,将含超吸水纤维无纺布层复合于吸收芯体上,吸水后整体膨胀,能够将液体均匀分散导入吸水层,不会导致吸水材料形成一坨,产品不易变形,含超吸水纤维无纺布层的厚度沿吸收芯体的中部向两端逐步减小,可以在芯体中部铺洒更高密度的吸水性材料,具有超强的吸液能力和保液能力,可以将面层透过和导流下来的尿液快速吸收和贮藏起来,起到导流的尿液的作用,帮助尿液扩散,且不易反渗,保持表面干爽,有效的阻隔尿液与宝宝幼嫩的皮肤接触,有效减少婴儿使用纸尿裤导致过敏的几率,整个复合式芯体手感柔软蓬松,具有良好肌肤触感。
本说明书中各个实施例采用递进的方式描述,每个实施例重点说明的都是与其他实施例的不同之处,各个实施例之间相同相似部分互相参见即可。
对所公开的实施例的上述说明,使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,在其它实施例中实现。因此,本发明将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。
Claims (10)
1.一种超吸水复合式芯体,其特征在于:所述复合式芯体从上到下依次包括面层、含超吸水纤维无纺布层、吸收芯体、PE透气底膜,所述吸收芯体由导流纤维和天然木浆纤维交叉编织成具有镂空网格的芯体单体交错叠加组成,所述含超吸水纤维无纺布层复合于吸收芯体上,且含超吸水纤维无纺布层的厚度沿吸收芯体的中部向两端逐步减小。
2.根据权利要求1所述的超吸水复合式芯体,其特征在于:所述含超吸水纤维无纺布层包括聚羧酸类吸水纤维、丙烯酸系吸水纤维、聚丙烯腈吸水纤维、聚乙烯醇类吸水纤维、改性聚乙烯醇类吸水纤维、纯海藻酸盐类吸水纤维中的至少一种吸水纤维或其任意组合。
3.根据权利要求1所述的超吸水复合式芯体,其特征在于:所述含超吸水纤维无纺布层的厚度为1~5mm。
4.根据权利要求1所述的超吸水复合式芯体,其特征在于:所述镂空网格中结合有活性炭、沸石、茶多酚中的一种或多种。
5.根据权利要求1所述的超吸水复合式芯体,其特征在于:所述导流纤维的重量比为30~60%,所述然木浆纤维的重量比为40~70%。
6.根据权利要求1所述的超吸水复合式芯体,其特征在于:所述芯体单体包括三层,所述中间层芯体单体位于上下两层芯体单体的中部,且中间层芯体单体的长度小于上下两层芯体单体的长度。
7.根据权利要求6所述的超吸水复合式芯体,其特征在于:所述芯体单体的厚度为1~2mm,所述吸收芯体的厚度为3-6mm。
8.根据权利要求1所述的超吸水复合式芯体,其特征在于:所述面层为3D珍珠棉。
9.一种超吸水复合式芯体的制备方法,其特征在于,所述方法包括:
将导流纤维和天然木浆纤维混合后交叉编织成具有镂空网格的单体,通过热风穿透将芯体单体粘合交错叠加形成吸收芯体;
将含超吸水纤维无纺布层复合于吸收芯体上;
将面层、复合有含超吸水纤维无纺布层的吸收芯体、PE透气底膜顺次通过热熔胶固定连接形成超吸水复合式芯体。
10.根据权利要求9所述超吸水复合式芯体的制备方法,其特征在于:在吸收芯体上添加活性炭、沸石、茶多酚中的一种或多种。
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