CN102387912A - 复合揩巾 - Google Patents
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Abstract
本发明提供一种揩巾,其包括至少一层不连续纤维的非织造网状层、以及连续纤维的纺粘-熔喷-纺粘网状层,所述纺粘-熔喷-纺粘网状层被设置为面向所述至少一层非织造网状层并与其相邻接触,其中所述揩巾的不透明指数为至少1.3,其中所述不透明指数基于以下公式计算:不透明指数=(揩巾的不透明度)/(揩巾的总基准重量)。
Description
技术领域
本发明涉及用于卫生目的的揩巾,尤其涉及具有多层结构的揩巾。
背景技术
卫生揩巾是公知的商业消费品,其已被用于婴儿揩巾、揩手巾、家用清洁揩巾、工业揩巾等。常规的揩巾包括单层的基本均一的材料。例如,某些单层揩巾包括气流法纤维网(air laid web of fibers),其在整个网中均一地混合或分布。这样的单层揩巾也包括聚合纤维,如聚酯、聚乙烯和聚丙烯,以及天然纤维或合成纤维,如纤维素纤维。
然而,利用这样的单层揩巾,难以获得必要的物理特性的平衡。具体地,取决于应用,需要优化揩巾的物理特性,如柔软度、柔韧性、强度、厚度、纹理、完整性、不透明度和弹性。
发明内容
根据本发明的示例性实施方式的揩巾包括:至少一层不连续纤维的非织造网状层;以及连续纤维的纺粘-熔喷-纺粘网状层,所述纺粘-熔喷-纺粘网状层被设置为面向所述至少一层非织造网状层并与其相邻接触,其中所述揩巾的不透明指数为至少1.3,其中所述不透明指数基于以下公式计算:
不透明指数=(揩巾的不透明度)/(揩巾的总基准重量(basis weight))。
在至少一个实施方式中,所述至少一层非织造网状层包括第一非织造网状层和第二非织造网状层,所述纺粘-熔喷-纺粘网状层设置在第一和第二非织造网状层之间。
在至少一个实施方式中,所述不连续纤维包括人造丝纤维、天然纤维和聚合纤维。
在至少一个实施方式中,所述天然纤维包括以下天然纤维类型中的至少一种:棉、竹、麻、聚交酯和浆料(含纤维素的浆料,pulp)。
在至少一个实施方式中,所述聚合纤维包括以下聚合纤维类型中的至少一种:聚丙烯和聚酯。
在至少一个实施方式中,所述至少一层非织造网状层是以下类型的网状层之一:梳理纤维网状层(carded fiber web layer)、气流成网(air-laid)纤维网状层和湿法成网(wet-laid)纤维网状层。
在至少一个实施方式中,所述至少一层非织造网状层的基准重量为约5gsm至约55gsm。
在至少一个实施方式中,所述纺粘-熔喷-纺粘网状层包括聚丙烯。
在至少一个实施方式中,所述纺粘-熔喷-纺粘网状层包括聚交酯。
在至少一个实施方式中,所述纺粘-熔喷-纺粘网状层是未粘结的。
在至少一个实施方式中,所述纺粘-熔喷-纺粘网状层是粘结的。
在至少一个实施方式中,所述纺粘-熔喷-纺粘网状层的基准重量为约5gsm至约35gsm。
在至少一个实施方式中,所述至少一层非织造网状层是与所述纺粘-熔喷-纺粘材料层粘结的。
在至少一个实施方式中,所述揩巾还包括液体。
在至少一个实施方式中,所述揩巾的总基准重量为至少20gsm。
在至少一个实施方式中,所述揩巾的不透明度为至少40%。
在至少一个实施方式中,所述揩巾的纵向抗张强度相对于所述揩巾的横向抗张强度的比率为约2.0至约3.0。
在至少一个实施方式中,所述揩巾的横向伸长率(percentage elongation)相对于所述揩巾的纵向伸长率的比率为约1.0至约1.5。
在至少一个实施方式中,所述揩巾的不透明度-横向抗张强度指数(opacity-cross dimensional tensile strength index)为至少0.5,其中所述不透明度-横向抗张强度指数基于以下公式计算:
不透明度-横向抗张强度指数=((揩巾的不透明度)(揩巾的横向抗张强度))/(揩巾的总基准重量)2。
在至少一个实施方式中,揩巾的组合指数为至少0.7,其中所述组合指数基于以下公式计算:
组合指数=[((揩巾的不透明度)(揩巾的横向抗张强度)(1/揩巾的横向伸长率))/(揩巾的总基准重量)3](10000)。
根据本发明的示例性实施方式的揩巾包括:至少一层不连续纤维的非织造网状层;以及连续纤维的纺粘-熔喷-纺粘网状层,所述纺粘-熔喷-纺粘网状层被设置为面向所述至少一层非织造网状层并与其相邻接触,其中所述揩巾的组合指数为至少0.7,其中所述组合指数基于以下公式计算:
组合指数=[((揩巾的不透明度)(揩巾的横向抗张强度)(1/揩巾的横向伸长率))/(揩巾的总基准重量)3](10000)。
形成根据本发明的示例性实施方式的揩巾的方法包括以下步骤:形成至少一层不连续纤维的非织造网状层;形成连续纤维的纺粘-熔喷-纺粘网状层;以及将所述至少一层非织造网状层与所述纺粘-熔喷-纺粘网状层粘结,其中所述揩巾的不透明指数为至少1.3,其中所述不透明指数基于以下公式计算:
不透明指数=(揩巾的不透明度)/(揩巾的总基准重量)。
在至少一个实施方式中,形成至少一层非织造网状层的步骤包括形成第一非织造网状层和第二非织造网状层。
在至少一个实施方式中,所述方法还包括将所述纺粘-熔喷-纺粘网状层置于第一和第二非织造网状层之间。
在至少一个实施方式,形成至少非织造网状层的步骤包括使用以下类型的网形成方法中的至少一种:梳理、气流成网和湿法成网。
在至少一个实施方式中,所述方法还包括粘结所述至少一层非织造网状层。
在至少一个实施方式中,粘结所述至少一层非织造网状层的步骤包括使用以下粘结方法中的至少一种:水刺缠结、热粘结、化学粘结和机械粘结。
在至少一个实施方式中,所述方法还包括粘结所述纺粘-熔喷-纺粘网状层。
在至少一个实施方式中,将所述至少一层非织造网状层与所述纺粘-熔喷-纺粘网状层粘结的步骤包括使用以下粘结方法中的至少一种:水刺缠结和热粘结。
附图说明
通过参考以下对本发明的虽然示例性的但是优选的实施方式的详细描述,当结合附图时,本发明的上述及相关的目的、特征和优点会被更充分理解,其中:
图1是根据本发明的一个示例性实施方式的揩巾的横截面视图;
图2是根据本发明的另一示例性实施方式的揩巾的横截面视图;且
图3是显示根据本发明的一个示例性实施方式的揩巾的形成方法的流程图。
图4是显示根据本发明的各种示例性实施方式和对比例的揩巾的不透明度相对于基准重量的图;
图5是显示根据本发明的各种示例性实施方式和对比例的揩巾的抗张强度比率相对于基准重量的图;
图6是显示根据本发明的各种示例性实施方式和对比例的揩巾的伸长率(elongation ratio)相对于基准重量的图;
图7是显示根据本发明的各种示例性实施方式和对比例的揩巾的不透明度-横向抗张强度指数相对于基准重量的图;且
图8是显示根据本发明的各种示例性实施方式和对比例的揩巾的组合指数相对于基准重量的图。
具体实施方式
图1是根据本发明的示例性实施方式的揩巾的横截面视图,其中揩巾被总体指定为附图标记1。揩巾1包括非织造网状层10和纺粘-熔喷-纺粘(SMS)网状层20,所述SMS网状层20被设置为面向所述非织造网状层10并与其相邻接触。如下文将更详细解释的,SMS网状层20使揩巾1的不透明度增加,从而使揩巾呈现为更重的织物,而不显著增加揩巾1的总重量。
除了天然不连续纤维和聚合不连续纤维之外,非织造网状层10优选地由人造丝(粘胶纤维)的不连续纤维组成。用于非织造网状层10中的天然不连续纤维可以由例如棉、浆料、竹、麻或这些材料的混合物制成。用于非织造网状层10中的聚合不连续纤维可以由例如聚丙烯或聚酯制成。在另一示例性实施方式中,可以使用更加环境友好的聚合材料,例如聚交酯(PLA)。
可以使用任何适当的非织造工艺形成非织造网状层10,例如梳理、湿法成网和气流成网工艺。非织造网状层10的基准重量优选为约5gsm至约55gsm。在优选的实施方式中,非织造网状层10的基准重量为33gsm。在另一优选的实施方式中,非织造网状层10的基准重量为55gsm。
SMS网状层20优选由聚合材料的连续纤维组成。聚合材料可以是例如,诸如聚丙烯和聚乙烯的聚烯烃、聚酰胺和聚酯。在另一示例性实施方式中,可以使用更加环境友好的聚合材料,例如聚交酯(PLA)。
SMS网状层20可以是粘结的或未粘结的。SMS网状层20可以是未粘结的,其中多个纺粘和熔喷束组合以产生SMS结构,可以将其直接安装在揩巾生产线中,代替展开的(unwind)以引入预先形成的SMS织物的卷(roll)。如果是粘结的,则SMS网状层10可以使用任何适当的粘结工艺粘结,例如热粘结、水刺缠结、化学粘结和机械粘结。SMS网状层20的基准重量优选为约5gsm至35gsm。在优选的实施方式中,SMS网状层20的基准重量为12gsm。在另一优选的实施方式中,SMS网状层20的基准重量为13.5gsm。选择SMS网状层20的基准重量,从而通过增加不透明度、增加织物厚度和改善白度而改善揩巾1的整体外观。此外,引入SMS网状层20改善揩巾1的抗张强度,而不必增加揩巾1的总基准重量。SMS网状层20还可以包括着色剂,例如TiO2,以进一步增加揩巾1的不透明度。在一个示例性实施方式中,加入到SMS网状层20的着色剂的量可以高达约5wt%。在本发明的一个示例性实施方式中,SMS网状层20是可以从First Quality Nonwovens(黑泽尔顿,宾夕法尼亚州)商购的SMS产品。
图2是根据本发明的另一示例性实施方式的揩巾的横截面视图,其中揩巾被总体指定为附图标记100。揩巾100包括第一外部非织造网状层110、第二外部非织造网状层130以及置于第一和第二外部非织造网状层110、130之间的SMS网状层120。第一和第二非织造网状层110、130可以与上述非织造网状层10的结构相同,包括聚合不连续纤维和天然不连续纤维。SMS网状层120可以与上述SMS层20的结构相同,包括聚合材料的连续纤维。
还可以将本文所述的揩巾用液体浸渍,从而使揩巾成为湿揩巾。液体可以是能够被吸收进揩巾或者能够驻留在揩巾上的任何溶液,并且可以包括提供期望的擦拭性质的任何适当的成分。例如,该成分可以包括水、软化剂、表面活性剂、芳香剂、防腐剂、螯合剂、pH缓冲剂、溶剂和其它清洁剂或增强剂,例如本领域技术人员公知的用于家庭/工业用途的那些或其组合。液体还可以包括洗剂(lotions)和/或药物。
还可以对本文所述的揩巾进行任何数目和种类的后处理步骤,包括例如水刺压花(hydro-embossing)、热压花(thermal embossing)、转移印花(颜色或纹理)和喷涂。
图3是显示根据本发明的一个示例性实施方式的揩巾的制造方法的流程图,其中该方法被总体指定为附图标记200。在步骤S210中,使用任何适当的非织造工艺形成不连续纤维的两层非织造网状层,例如使用梳理、湿法成网和气流成网工艺。除了天然不连续纤维和聚合不连续纤维之外,非织造网状层可以包括人造丝的不连续纤维。用于非织造网状层中的天然不连续纤维可以由例如棉、纸浆、竹、麻或这些材料的混合物制成。用于非织造网状层中的聚合不连续纤维可以由例如聚丙烯或聚酯制成。在另一示例性实施方式中,可以使用更加环境友好的聚合物材料,例如聚交酯(PLA)。
在步骤S220中,使用纺粘-熔喷-纺粘工艺形成连续纤维的网状层。连续纤维可以是聚合材料,例如,诸如聚丙烯和聚乙烯的聚烯烃、聚酰胺和聚酯。在一个示例性实施方式中,可以使用更加环境友好的聚合材料,例如聚交酯(PLA)。在另一实施方式中,可以提供预先形成的SMS卷,其中SMS卷是粘结的或者未粘结的。
在步骤S230中,对步骤S220中形成的SMS网状层进行粘结工艺。粘结工艺可以包括任何适当的粘结工艺,例如热粘结、水刺缠结、化学粘结和机械粘结。应当理解,步骤S230是任选的,并且在本发明的其它示例性实施方式中,SMS网状层可以是未粘结的。
在步骤S240中,将SMS网状层粘结在两层非织造网状层之间以形成揩巾。可以使用任何适当的粘结工艺将三层粘结在一起,包括例如水刺缠结和热粘结。
应当理解,根据本发明的揩巾的形成方法不限于上述方法。例如,在其它示例性实施方式中,可以在将SMS网状层与非织造网状层粘结的同时进行SMS网状层的粘结。此外,该方法可以包括另外的用液体浸渍揩巾的步骤,以便形成湿揩巾。
以下实施例例示本发明的优点:
实施例0(E0)
提供三层复合物。每一外部梳理网状层的基准重量为约10gsm且由粘胶纤维和聚酯制成,其中混合重量比为50/50,并且内层具有12gsm SMS结构,其可以从First Quality Nonwovens(黑泽尔顿,宾夕法尼亚州)商购。使用正方形设计(square design)对整个复合物进行水刺缠结(hydroentangled)和水刺成图(hydropatterned)。对三层复合物进行以下公知的且广泛用于工业中的标准测试操作:
抗张强度/伸长率:EDANA:ERT 20.2-89
厚度:EDANA:ERT 30.5-99
不透明度:ASTM:E 1347
基准重量:ASTM:D 6242-98
实施例1(E1)
提供两层复合物。一层复合物是13gsm的由粘胶纤维和聚酯制成的梳理网(card web),其中粘胶纤维与聚酯的重量比为30/70。另一层是20gsm的SMS结构,其可以从First Quality Nonwovens(黑泽尔顿,宾夕法尼亚州)商购。对整个复合物仅进行水刺缠结,而不进行水刺成图。对两层复合物进行与实施例0所述相同的测试操作。
实施例2(E2)
提供与实施例1相同的结构,但具有略低的基准重量,其梳理网重12gsm。对该结构进行与实施例0所述相同的测试操作。
实施例3(E3)
提供与实施例1相同的结构,但具有略低的基准重量,其梳理网重12gsm。对该结构进行与实施例0所述相同的测试操作。
实施例4(E4)
提供与实施例1相同的结构,但具有略低的基准重量,其梳理网重10gsm。使用正方形设计对整个复合物进行水刺缠结和水刺成图。对该结构进行与实施例0所述相同的测试操作。
实施例5(E5)
提供与实施例1相同的结构,但具有略低的基准重量,其梳理网重10gsm。对整个复合物进行水刺缠结而不进行水刺成图。对该结构进行与实施例0所述相同的测试操作。
对比例1(CE1)
提供100%梳理网水刺缠结的结构。梳理网由粘胶纤维和聚酯制成,其中粘胶纤维与聚酯的重量比为30/70。使用正方形设计对整个复合物进行水刺缠结和水刺成图。对该结构进行与实施例0所述相同的测试操作。
对比例2(CE2)
提供100%梳理网水刺缠结的结构。梳理网由粘胶纤维和聚酯制成,其中粘胶纤维与聚酯的重量比为30/70。对该产物不进行水刺成图。对该结构进行与实施例0所述相同的测试操作。
对比例3(CE3)
提供100%梳理网水刺缠结的结构。梳理网由粘胶纤维和聚酯制成,其中粘胶纤维与聚酯的重量比为50/50。对该结构进行与实施例0所述相同的测试操作。
对比例4(CE4)
提供100%梳理网水刺缠结的结构。梳理网由粘胶纤维和聚酯制成,其中粘胶纤维与聚酯的重量比为30/70。使用正方形设计对整个复合物进行水刺缠结和水刺成图。对该结构进行与实施例0所述相同的测试操作。
对比例5(CE5)
提供100%梳理网水刺缠结的结构,其基准重量低于对比例4。梳理网由粘胶纤维和聚酯制成,其中粘胶纤维与聚酯的重量比为30/70。使用正方形设计对整个复合物进行水刺缠结和水刺成图。对该结构进行与实施例1所述相同的测试操作。
对比例6(CE6)
提供100%梳理网水刺缠结的结构。梳理网由粘胶纤维、聚丙烯和回收纤维制成,其中混合重量比分别为29/66/5。使用正方形设计对整个复合物进行水刺缠结和水刺成图。对该结构进行与实施例0所述相同的测试操作。
对比例7(CE7)
提供100%梳理网水刺缠结的结构。梳理网由粘胶纤维和聚丙烯制成,其中粘胶纤维与聚丙烯的重量比为30/70。对整个复合物进行水刺缠结而不进行水刺成图。对该结构进行与实施例0所述相同的测试操作。
对比例8(CE8)
提供100%梳理网水刺缠结的结构,其基准重量低于对比例3。梳理网由粘胶纤维和聚酯制成,其中粘胶纤维与聚酯的重量比为50/50。对该结构进行与实施例0所述相同的测试操作。
对比例9(CE9)
提供100%梳理网水刺缠结的结构,其基准重量高于对比例3。梳理网由棉、粘胶纤维和聚酯制成,其中棉、粘胶纤维与聚酯的重量比为15/35/50。对该结构进行与实施例0所述相同的测试操作。
对比例10(CE10)
提供三层复合物,其具有外部梳理网状层和纺粘织物内层。每一梳理网状层的基准重量为10gsm且由混合比率为50/50的粘胶纤维和聚酯制成。内层的基准重量为10gsm。对总共30gsm的复合物进行水刺缠结,而不进行水刺成图。
这些测试的结果提供在如下所示的表1中:
表1
从表1,对于每一实施例和对比例,将不透明度数据相对于基准重量数据作图,并将结果示于图4提供的图中,其中该图被总体指定为附图标记300。图300显示,与作为标准水刺(spunlace)产品的对比例1-9相比,本发明的实施例0-5在较低的基准重量下一致地提供较高的不透明度,并且与作为复合结构的对比例10相比,本发明的实施例0-5在类似的基准重量下一致地提供较高的不透明度。这说明本发明的一个优点,即提供这样的揩巾:其重量相对轻,而仍然提供高不透明度的视觉保密性。对此,使用以下所示的公式1对上述每一实施例计算不透明指数:
不透明指数=(揩巾的不透明度)/(揩巾的总基准重量) (1)
每一实施例的不透明指数计算结果提供在如下所示的表2中:
表2
表2显示,与其它揩巾产品相比,本发明的实施例0-5一致地提供较高的不透明指数。具体地,根据本发明各种示例性实施方式的揩巾的不透明指数可以为至少1.3,而其它揩巾产品的不透明指数一般低于该值。
此外,从表1,对于每一实施例和对比例,将抗张强度比率数据相对于基准重量数据作图,并将结果示于图5提供的图中,其中该图被总体指定为附图标记400。抗张强度比率可以被定义为揩巾在纵向的抗张强度与揩巾在横向的抗张强度之间的比率。图400显示,与对比例1-9相比,本发明的实施例0-5在较低的基准重量下一致地提供较低的抗张强度。用对比例10的复合结构达到了相当的抗张强度比率,但如上文所指明的,对比例10不能达到实施例1-9如此高的不透明度。这说明,本发明的另一优点,即提供这样的揩巾:其重量相对轻,但具有改善的抗张强度特性,与其它揩巾结构相比,其横向抗张强度相对更接近于纵向抗张强度值。在常规的非织造制造工艺中,纵向强度通常大大高于横向强度。不幸的是,当需要为消费者提供足够的织物强度时,横向强度会成为“薄弱环节”。此外,由于显著较低的横向强度,消费者对较高纵向强度的需求减弱。本发明提供了较高质量的揩巾,其通过相对于已达到的纵向强度增加横向强度而具有更均一的多向强度。
此外,从表1,对于每一实施例和对比例,将伸长率数据相对于基准重量数据作图,并将结果示于图6提供的图中,其中该图被总体指定为附图标记500。伸长率可以被定义为揩巾在横向的伸长率与揩巾在纵向的伸长率之间的比率。图500显示,与对比例1-9相比,本发明的实施例0-5在较低的基准重量下一致地提供较低的伸长率。这说明本发明的另一优点,即提供这样的揩巾:其重量相对轻,但具有改善的伸长率特性,与其它揩巾结构相比,其横向伸长率相对更接近于纵向伸长率值。在常规的非织造制造工艺中,横向伸长率通常大大高于纵向伸长率。不幸的是,当需要为消费者提供足够的揩巾完整性时,横向伸长率会成为“薄弱环节”。具体地,消费者对具有相对较高横向伸长率的揩巾的需求会很低,因为织物的伸长会导致所得揩巾的长度和宽度尺寸显著不同。本发明提供较高质量的揩巾,其通过降低横向伸长率使其接近已达到的纵向伸长率,而具有更均一的多向伸长率。
总体来讲,根据本发明的各种示例性实施方式的揩巾相对于常规揩巾结构提供了改善的质量,且具体地能够提供增加的不透明度、增加的横向抗张强度和降低的横向伸长率的组合。对此,使用如下所示的公式2对每一上述实施例计算不透明度-横向抗张强度指数:
不透明度-横向抗张强度指数=((揩巾的不透明度)(揩巾的横向抗张强度))/(揩巾的总基准重量)2 (2)
每一实施例的不透明度-横向抗张强度指数计算结果提供于以下所示的表3中:
表3
对于每一实施例和对比例1-9,将不透明度-横向抗张强度指数数据相对于基准重量作图,结果示于图7提供的图中,其中该图被总体指定为附图标记600。图600显示,与常规的揩巾结构相比,尤其是在低基准重量下,根据本发明的揩巾一致地提供较高的不透明度-横向抗张强度指数(即,较高的不透明度和较高的横向抗张强度二者的组合)。对此,根据本发明的示例性实施方式的揩巾的不透明度-横向抗张强度指数可以为至少0.5。
此外,使用如下所示的公式3,对于每一上述实施例计算组合指数:
组合指数=[((揩巾的不透明度)(揩巾的横向抗张强度)(1/揩巾的横向伸长率))/(揩巾的总基准重量)3](10000) (3)
每一实施例的组合指数计算结果提供在如下所示的表4中:
表4
对于每一实施例和对比例1-9,将表4的组合指数数据相对于基准重量作图,结果示于图8提供的图中,其中该图被总体指定为附图标记700。图700显示,与常规的揩巾结构相比,尤其是在低基准重量下,根据本发明的揩巾一致地提供较高的组合指数(即,较高的不透明度、较高的横向抗张强度和较低的横向伸长率的组合)。对此,根据本发明的示例性实施方式的揩巾的组合指数可以为至少0.7。
现已详细显示和描述了本发明的优选实施方式,对其进行各种修改和改进对于本领域技术人员来说将是显而易见的。因此,本发明的精神和范围应当被广义地理解,并且仅由所附权利要求来限定而不是由前述说明书来限定。
Claims (44)
1.揩巾,其包括:
至少一层不连续纤维的非织造网状层;以及
连续纤维的纺粘-熔喷-纺粘网状层,所述纺粘-熔喷-纺粘网状层被设置为面向所述至少一层非织造网状层并与其相邻接触,其中所述揩巾的不透明指数为至少1.3,所述不透明指数基于以下公式计算:
不透明指数=(揩巾的不透明度)/(揩巾的总基准重量)。
2.如权利要求1所述的揩巾,其中所述至少一层非织造网状层包括第一非织造网状层和第二非织造网状层,所述纺粘-熔喷-纺粘网状层设置在所述第一非织造网状层和第二非织造网状层之间。
3.如权利要求1所述的揩巾,其中所述不连续纤维包括人造丝纤维、天然纤维和聚合纤维。
4.如权利要求3所述的揩巾,其中所述天然纤维包括以下天然纤维类型中的至少一种:棉、竹、麻和浆料。
5.如权利要求3所述的揩巾,其中所述聚合纤维包括以下聚合纤维类型中的至少一种:聚丙烯、聚酯和聚交酯。
6.如权利要求1所述的揩巾,其中所述至少一层非织造网状层是以下类型的网状层之一:梳理纤维网状层、气流成网纤维网状层、湿法成网纤维网状层、或其组合。
7.如权利要求1所述的揩巾,其中所述至少一层非织造网状层的基准重量为约5gsm至约55gsm。
8.如权利要求1所述的揩巾,其中所述纺粘-熔喷-纺粘网状层包括聚丙烯。
9.如权利要求1所述的揩巾,其中所述纺粘-熔喷-纺粘网状层包括聚交酯。
10.如权利要求1所述的揩巾,其中所述纺粘-熔喷-纺粘网状层是未粘结的。
11.如权利要求1所述的揩巾,其中所述纺粘-熔喷-纺粘网状层是粘结的。
12.如权利要求1所述的揩巾,其中所述纺粘-熔喷-纺粘网状层的基准重量为约5gsm至约35gsm。
13.如权利要求1所述的揩巾,其中所述至少一层非织造网状层是与所述纺粘-熔喷-纺粘材料层粘结的。
14.如权利要求1所述的揩巾,其还包括液体。
15.如权利要求1所述的揩巾,其中所述揩巾的不透明度-横向抗张强度指数为至少0.5,其中所述不透明度-横向抗张强度指数基于以下公式计算:
不透明度-横向抗张强度指数=((揩巾的不透明度)(揩巾的横向抗张强度))/(揩巾的总基准重量)2。
16.如权利要求1所述的揩巾,其中所述揩巾的总基准重量为至少20gsm。
17.如权利要求1所述的揩巾,其中所述揩巾的不透明度为至少40%。
18.如权利要求1所述的揩巾,其中所述揩巾的纵向抗张强度相对于所述揩巾的横向抗张强度的比率为约2.0至约3.0。
19.如权利要求1所述的揩巾,其中所述揩巾的横向伸长率相对于所述揩巾的纵向伸长率的比率为约1.0至约1.5。
20.如权利要求1所述的揩巾,其中所述揩巾的组合指数为至少0.7,其中所述组合指数基于以下公式计算:
组合指数=[((揩巾的不透明度)(揩巾的横向抗张强度)(1/揩巾的横向伸长率))/(揩巾的总基准重量)3](10000)。
21.揩巾,其包括:
至少一层不连续纤维的非织造网状层;以及
连续纤维的纺粘-熔喷-纺粘网状层,所述纺粘-熔喷-纺粘网状层被设置为面向所述至少一层非织造网状层并与其相邻接触,其中所述揩巾的组合指数为至少0.7,其中所述组合指数基于以下公式计算:
组合指数=[((揩巾的不透明度)(揩巾的横向抗张强度)(1/揩巾的横向伸长率))/(揩巾的总基准重量)3](10000)。
22.一种形成揩巾的方法,包括以下步骤:
形成至少一层不连续纤维的非织造网状层;
形成连续纤维的纺粘-熔喷-纺粘网状层;以及
将所述至少一层非织造网状层与所述纺粘-熔喷-纺粘网状层粘结,其中所述揩巾的不透明指数为至少1.3,其中所述不透明指数基于以下公式计算:
不透明指数=(揩巾的不透明度)/(揩巾的总基准重量)。
23.如权利要求22所述的方法,其中形成所述至少一层非织造网状层的步骤包括形成第一非织造网状层和第二非织造网状层。
24.如权利要求23所述的方法,其还包括将所述纺粘-熔喷-纺粘网状层置于所述第一非织造网状层和第二非织造网状层之间。
25.如权利要求22所述的方法,其中形成所述至少非织造网状层的步骤包括使用以下类型的网形成方法中的至少一种:梳理、气流成网和湿法成网。
26.如权利要求22所述的方法,其还包括粘结所述至少一层非织造网状层。
27.如权利要求26所述的方法,其中粘结所述至少一层非织造网状层的步骤包括使用以下粘结方法中的至少一种:水刺缠结、热粘结、化学粘结和机械粘结。
28.如权利要求22所述的方法,其还包括粘结所述纺粘-熔喷-纺粘网状层。
29.如权利要求22所述的方法,其中将所述至少一层非织造网状层与所述纺粘-熔喷-纺粘网状层粘结的步骤包括使用以下粘结方法中的至少一种:水刺缠结和热粘结。
30.如权利要求1所述的揩巾,其中所述揩巾的不透明指数为至少1.6。
31.如权利要求1所述的揩巾,其中所述揩巾的不透明指数为1.6-1.7。
32.如权利要求1所述的揩巾,其中所述揩巾的不透明指数为至少1.7。
33.如权利要求15所述的揩巾,其中所述揩巾的不透明度-横向抗张强度指数为至少0.7。
34.如权利要求15所述的揩巾,其中所述揩巾的不透明度-横向抗张强度指数为0.7-1.1。
35.如权利要求15所述的揩巾,其中所述揩巾的不透明度-横向抗张强度指数为至少1.1。
36.如权利要求20所述的揩巾,其中所述揩巾的组合指数为至少2.7。
37.如权利要求20所述的揩巾,其中所述揩巾的组合指数为2.7-4.3。
38.如权利要求20所述的揩巾,其中所述揩巾的组合指数为至少4.3。
39.如权利要求21所述的揩巾,其中所述揩巾的组合指数为至少2.7。
40.如权利要求21所述的揩巾,其中所述揩巾的组合指数为2.7-4.3。
41.如权利要求21所述的揩巾,其中所述揩巾的组合指数为至少4.3。
42.如权利要求22所述的揩巾,其中所述揩巾的不透明指数为至少1.6。
43.如权利要求22所述的揩巾,其中所述揩巾的不透明指数为1.6-1.7。
44.如权利要求22所述的揩巾,其中所述揩巾的不透明指数为至少1.7。
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CN106120158A (zh) * | 2016-08-18 | 2016-11-16 | 杭州湿法无纺布设备有限公司 | 复合擦拭材料生产装置及其工艺 |
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CN112513357A (zh) * | 2018-07-31 | 2021-03-16 | 连津格股份公司 | 无纺织物、无纺织物的用途和包含所述无纺织物的擦拭巾、干衣纸以及面膜 |
CN112513357B (zh) * | 2018-07-31 | 2023-07-11 | 连津格股份公司 | 无纺织物、无纺织物的用途和包含所述无纺织物的擦拭巾、干衣纸以及面膜 |
CN113573882A (zh) * | 2019-01-31 | 2021-10-29 | 杜邦安全与建筑公司 | 多层片材结构 |
CN110576660A (zh) * | 2019-09-18 | 2019-12-17 | 上海研蓁化工科技有限公司 | Msm复合无纺布及其制造方法 |
Also Published As
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CA2736186A1 (en) | 2010-03-11 |
EP2331854A1 (en) | 2011-06-15 |
WO2010028238A1 (en) | 2010-03-11 |
AU2009289510A1 (en) | 2010-03-11 |
CA2736186C (en) | 2016-02-23 |
NZ591666A (en) | 2012-12-21 |
ES2436032T3 (es) | 2013-12-26 |
EP2331854B1 (en) | 2013-06-12 |
BRPI0918909A2 (pt) | 2018-05-22 |
MX2011002437A (es) | 2011-09-27 |
US20100062671A1 (en) | 2010-03-11 |
RU2011112049A (ru) | 2012-10-10 |
AU2009289510B2 (en) | 2015-04-02 |
EP2331854A4 (en) | 2012-02-01 |
RU2522062C2 (ru) | 2014-07-10 |
JP2012501752A (ja) | 2012-01-26 |
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