CN100436690C - 多层无纺织物 - Google Patents
多层无纺织物 Download PDFInfo
- Publication number
- CN100436690C CN100436690C CNB038200279A CN03820027A CN100436690C CN 100436690 C CN100436690 C CN 100436690C CN B038200279 A CNB038200279 A CN B038200279A CN 03820027 A CN03820027 A CN 03820027A CN 100436690 C CN100436690 C CN 100436690C
- Authority
- CN
- China
- Prior art keywords
- synthetic layer
- bondedfibre fabric
- thermoplastic
- binding domain
- calmodulin binding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/697—Containing at least two chemically different strand or fiber materials
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Abstract
一种无纺织物包括第一合成层,其包括重量占大约50%-90%的非热塑性吸收人造短纤维和重量占大约10%-50%的热塑性纤维。第一合成层的第一外表面上的主要纤维包括非热塑性吸收人造短纤维,第一合成层的第二外表面上的主要纤维包括非热塑性吸收人造短纤维。该无纺织物还包括第二合成层,其包括重量占大约50%-90%的非热塑性吸收人造短纤维和重量占大约10%-50%的热塑性纤维。第二合成层与第一合成层的第二外表面相邻。无纺织物还包括结合区域,其中第一合成层的热塑性纤维的一部分熔合到第二合成层的热塑性纤维的一部分,另外该结合区域具有多个邻接空隙。
Description
发明领域
本发明通常涉及非纺织材料的准备和制造。更具体地,本发明涉及可适于用作吸收擦拭物的非纺织材料的准备和制造。
背景技术
在许多应用中需要有一种具有快速吸收大量油和水的擦拭物。擦拭物理想地保持也无条痕的干净表面。优选地,通过将吸收的液体拧出,擦拭物能重新使用。擦拭物理想地具有足够强度和抗磨损性来经受住这种使用而不撕开、撕碎或露出棉绒。擦拭物理想地还具有包括柔软和布质性能这样的舒适接触手感。
有许多类型的擦拭物可以利用。纸质擦拭物价格便宜,但对于吸收油质液体常常效果不好。而布质擦拭物能充分吸收水和油,但其制造成本高,需要洗烫来使其使用划算。非纺织擦拭物价格低廉可任意处理,但是与布质擦拭物相比在吸收性能和手感方面都不足。
在现有技术中能吸收水和油的亲水和斥水纤维的非纺织合成物是已知的。这些高基重擦拭物具有接近布质擦拭物那样的吸收能力。然而,仍需要提供一种无纺织物用于具有改进触觉性质的、更高吸收能力的低价非纺织擦拭物。
发明内容
本发明提供一种高吸收能力的无纺织物满足改进非纺织擦拭物的上述需要。该无纺织物包括第一合成层,其包括重量占50-90%的非热塑性吸收人造短纤维和重量占10-50%的热塑性纤维。第一合成层的第一外表面上的主要纤维包括非热塑性吸收人造短纤维,第一合成层的第二外表面上的主要纤维包括热塑性纤维。该无纺织物还包括第二合成层,其包括重量占50-90%的非热塑性吸收人造短纤维和重量占10-50%的热塑性纤维。第二合成层与第一合成层的第二外表面相邻。无纺织物还包括结合区域,其中第一合成层的热塑性纤维的一部分与第二合成层的热塑性纤维的一部分熔合,另外该结合区域具有多个邻接空隙。
理想地,邻接空隙允许被吸收液体在结合区域内的充分流动。一方面,结合区域包括无纺织物表面上按式样布置的分散结合点;另一方面,结合区域采用超声波焊接。
一方面,结合区域在z向,即垂直于无纺织物表面的方向,是基本上多孔的。理想地,结合区域在x向和y向,即平行于无纺织物表面的方向是基本上多孔的。更理想地,结合区域在所有方向上,即x向、y向和z向都是基本上多孔的。
一方面,结合区域在擦拭应用中提供足够强度来抑制各层的分离。撕裂强度是设计的测量结合在一起的各层之间强度的一种测试。理想的无纺织物的撕裂强度在大约50-500克之间,更理想地,撕裂强度在大约50-300克之间,无纺织物的基重在大约40-300gsm之间。
一方面,非热塑性吸收人造短纤维包括纸浆纤维。另一方面,热塑性纤维包括基本上连续的纤维丝。理想地,热塑性纤维包括基本上连续的聚丙烯纤维丝。
另一方面,第二合成层的第一外表面上的主要纤维包括非热塑性吸收人造短纤维,第二合成层的第二外表面上的主要纤维包括热塑性纤维。理想地,第二合成层的第二外表面与第一合成层的第二外表面相邻。
在另一实施例中,无纺织物包括含有非热塑性吸收人造短纤维和热塑性纤维的第一合成层以及含有非热塑性吸收人造短纤维和热塑性纤维的第二合成层,其中第二合成层与第一合成层相邻,无纺织物还包括结合区域,其中第一合成层的热塑性纤维部分与第二合成层的热塑性纤维部分熔合,另外结合区域具有多个邻接空隙。
下面更详细地说明本发明的其它特征和各个方面。
附图简述
图1是用于将无纺材料的各层折叠在一起的示范过程的示意图。
图2是用于生产无纺材料的板层的示范过程的示意图。
图3是无纺材料的两个板层之间的示范热结合的剖面图的扫描电子显微镜(SEM)图像。
图4是包括热塑性纤维丝和纸浆纤维的液压缠绕而成的合成材料的两个板层之间的示范超声波焊接的剖面图的扫描电子显微镜图像。
定义
此处使用的术语“加工方向”指非纺织网成形期间纤维所积聚的成形表面的行进方向。
此处使用的术语“横向加工方向”指与上面定义的加工方向垂直的方向。
此处使用的术语“人造短纤维”指天然纤维或来自传统的人造短纤维纺纱和拉丝过程生产的纤维丝的切割长度。
此处使用的术语“纸浆”指来自象木本植物和非木本植物这种自然资源的纤维,木本植物包括,例如落叶树和针叶树。非木本植物包括,例如棉花、亚麻、细茎针草、乳草属植物、稻草、黄麻、***和甘蔗渣。
此处使用的术语“基本上连续的”纤维丝或纤维指通过从喷丝头挤出而准备的纤维丝或纤维,包括但不限于纺粘和吹熔的纤维。基本上连续的纤维丝或纤维的平均长度可从大于20厘米到大于1米,直至形成的网或织物的长度。此外和/或可选地,“基本上连续的”纤维丝或纤维的定义包括在形成无纺网或织物之前未切割,但后来在切割无纺网或织物时也被切割的那些材料。
此处以及权利要求中使用的术语“包括”是包含性的或可扩充的,并不排斥另外未列举的元素、组成成分或方法步骤。相应地,术语“包括”包含更限制性的术语“基本由......组成”和“由......组成”
具体实施方式
现参考本发明的具体实施例详细说明本发明。通过实施例说明本发明,而不是限制本发明。例如,作为一个实施例一部分说明示意的特征可与另一个实施例一同使用形成其它实施例。应注意,本发明包括在其范围和精神之内的这些和其它修改和变化。
本发明提供包括含有非热塑性吸收人造短纤维和热塑性纤维的合成层的无纺织物。各层在结合区域相互粘结,其中每个合成层的热塑性纤维和另外合成层的热塑性纤维熔合。非热塑性吸收人造短纤维和热塑性纤维理想的布置是,使得合成层的一个表面上的主要纤维是非热塑性吸收人造短纤维而另一表面上的主要纤维是热塑性纤维。理想地,具有主要热塑性纤维的各表面彼此相邻,以便形成具有外表面主要是非热塑性吸收人造短纤维的非纺织材料。
合成层的非纺织吸收人造短纤维可以是适用于非纺织成形过程的任何平均纤维长度,包括但不限于常规的湿法成形过程、气流成网过程、梳理过程等。作为非限制性的示例,非纺织吸收人造短纤维的平均长度可以为大约0.7-25毫米。通过非限制性示例,纸浆纤维是本发明应用中有用的非纺织吸收人造短纤维。其它合适的人造短纤维包括,但不限制于乙酸人造短纤维、粘胶人造短纤维、Nemex人造短纤维、Kevlar人造短纤维、聚乙烯醇人造短纤维、溶剂纺粘胶(lyocell)人造短纤维等。理想地,一层之内的非纺织吸收人造短纤维的基重例如大约为8-120gsm。更理想地,一层之内的非纺织吸收人造短纤维的基重大约为10-60gsm。
合成层的热塑性纤维可由已知的非纺织挤压过程形成,例如象已知的溶液纺丝或熔融纺丝过程,例如纺粘法或吹熔法。热塑性纤维可以是人造短纤维或者是基本上连续的纤维丝。
热塑性纤维可由任何可溶液纺丝或熔融纺丝的热塑性聚合物、共聚物或其混和物形成。对于本发明合适的聚合物包括,但不限于聚烯烃、聚酰胺、聚酯、聚亚安酯、其混和物和其共聚物等。理想地,热塑性纤维包括聚烯烃。更理想地,热塑性纤维包括聚丙烯和聚乙烯。合适的纤维成形聚合物成分可另外具有混和在其中的热塑性弹性体以及包含颜料、抗氧化剂、流动性促进剂、稳定剂、香料、磨料微粒、填充剂等。可选地,热塑性纤维可以是由两种或更多不同聚合物组成的多成分纤维。热塑性纤维可以是圆形或者本领域技术人员熟悉的任何合适的形状,包括但不限于双叶形、三叶形等。理想地,一层之内的热塑性纤维的基重为大约8-70gsm。更理想地,热塑性纤维的基重为大约10-35gsm。
本发明的另一方面中,合成层可包括例如象活性碳、粘土、淀粉和超强吸收材料这样的多种材料。例如,这些材料可以在非热塑性吸收人造短纤维结合进合成层之前加到它们中间。可选地和/或额外地,这些材料可以在非热塑性吸收人造短纤维与热塑性纤维结合之后加到合成层中。熟悉吸收材料的本领域技术人员对有用的超强吸收剂是熟悉的。在合成层中超强吸收剂理想的比例是在每100克纤维中占到大约50克。
理想地可使用结束步骤和/或后处理过程来将选择的性能施加到单个合成层。例如,合成层可受到机械处理、化学处理等。机械处理包括,通过非限制性的示例,挤压、压绉、刷光和/或用砑光辊、压花辊挤压等来提供统一的外观和/或某种触觉性质。化学后处理包括,通过非限制性的示例,用粘合剂、染料等处理。
能够用作来形成本发明非纺织材料的一层的合成非纺织材料示例,包括但不限于属于Anderson等的美国专利4,100,324、属于Georger等的美国专利5,508,102和属于Eschwey等的美国专利4,902,559中所说明的材料,在此完整地引入这些专利的内容作为参考。其它示范材料包括和吸收人造短纤维液压缠绕在一起的热塑性纤维成分,象属于Everhart等的美国专利5,284,703所说明的那样,在此完整地引入该专利的内容作为参考。
参照附图1,在10示意显示形成能用于形成至少一个本发明非纺织材料的合成层液压缠绕合成纤维的示范过程。在该过程中,非热塑性吸收人造短纤维的悬浮液由压头箱12提供,并通过水闸14在分散中沉积到常规的湿法成形机器的成形织物16上。然而,尽管在此通过湿法成形过程作为参考来形成非热塑性吸收人造短纤维网,要理解,非纺织吸收人造短纤维网可选地可通过其它常规过程来制造,例如象梳理成网、气流成网、干法成网等。
人造短纤维的悬浮液可以为典型地用于传统湿法成形过程中的任何稠度。例如,悬浮液可包括重量大约为0.01%-1.5%的悬浮在水中的人造短纤维。将水从人造短纤维的悬浮液去除以形成均匀的人造短纤维层18。人造短纤维层18的干基重例如可以是大约10-120gsm。理想地,人造短纤维层18的干基重为大约10-60gsm。
在该实施例中,人造短纤维可以是适用于常规的湿法成形过程的任意平均纤维长度。通过非限制性的示例,北方软木牛皮纸浆纤维是适用于湿法成形过程的人造短纤维,作为非限制性的示例,该人造短纤维的平均纤维长度可以是大约1.5到大约6mm。理想的纸浆纤维包括那些具有更短平均纤维长度的纤维,包括但不限于确定的原始硬木纸浆和来自例如新闻用纸、回收纸板、办公垃圾等处的二次(即再生)纤维。来自这些地方的纸浆纤维的典型平均纤维长度小于大约1.2mm,例如为0.7-1.2mm。其它合适的人造短纤维包括但不限于乙酸人造短纤维、粘胶人造短纤维等。
当纸浆纤维用于本发明中时,它们可能非精制的或受到不同程度的精制。可加入湿强度树脂和/或树脂粘合剂来提高所需要强度和的抗磨损性。有用的粘合剂和湿强度树脂对熟悉造纸领域技术人员是熟悉的。也可将交联介质和/或水合介质加入该纸浆。如果需要非常敞开或松散的纸浆纤维,可加入松解介质来降低氢键结合度。有用的松解介质对熟悉造纸领域技术人员是熟悉的。加入一些松解介质也可降低静态和动态摩擦系数。松解剂被认为充当润滑剂或摩擦降低介质。
再次参照附图1,热塑性纤维基层20从供应辊22上解绕。热塑性纤维基层20经过由叠辊28和30形成的S形辊列26的夹隙24。在可选实施例(未显示)中,非纺织基层可在导入夹隙24之前在处于一条直线上。对于本发明辊的排列是否精确并不关键。
热塑性纤维基层20的基重可大约为10-70gsm。理想地,热塑性纤维基层20的基重可大约为10-35gsm。组成热塑性纤维基层的聚合物可包括另外的材料,例如象颜料、抗氧化剂、流动性促进剂、稳定剂等。
在液压缠绕过程之前可将热塑性纤维基层20结合。理想地,热塑性纤维基层20的结合区域小于大约30%,而均匀结合密度大于大约100结点/平方英寸。例如,热塑性纤维基层可具有大约2%-30%的结合区域和大约250-500针结点/平方英寸的结合密度。这种结合中,总结合区域和结合密度可通过用具有不同结合模式的结合辊将热塑性纤维基层结合来达到。尽管以上说明了由热结合辊成生针结合是理想的,但是也能使用其它能在最小总体结合区域产生良好纤维丝束的任何形式的结合。例如,结合热结合和乳胶注入可用于提供理想的具有最小结合区域的纤维束。可选地和/或额外地,可通过例如喷洒或印晒将树脂、乳胶或粘合剂应用于热塑性纤维基层,并使其干燥以提供理想的结合。
然后,人造短纤维层18置放到搁置在传统的液压缠绕机械的有孔缠绕表面32上的热塑性纤维基层20上。理想地,人造短纤维层18在热塑性纤维基层20和液压缠绕支管34之间。人造短纤维层18和热塑性纤维基层20从一个或多个液压缠绕支管34之下经过,用液体射流处理使人造短纤维缠绕热塑性纤维基层20。液体射流也将人造短纤维驱入并穿过热塑性纤维基层20以形成合成材料36。
可选地,人造短纤维层18和热塑性纤维基层20在相同的湿法成网发生处的有孔筛网(即网格织物)上时,可发生液压缠绕。可选的,干燥的人造短纤维片能重叠到热塑性纤维基层上,重新水合为特定的稠度,然后用于液压缠绕。
当人造短纤维层18用水高度饱和时,发生液压缠绕。例如,当人造短纤维层18在刚刚液压缠绕之前包括重量达到大约90%的水。可选地,人造短纤维层可以是人造短纤维气流成网层或干垫干法成网层。
液压缠绕可运用常规的液压缠绕过程和设备完成,例如象属于Everhart等人的美国专利5,284,703和属于Evans的美国专利3,485,706中的那些设备,在此引入这些专利的全部内容作为参考。液压缠绕可通过例如水这样的合适的工作流体来完成。工作流体流过将流体均匀分配到一系列单独的孔或口(orifice)的支管,通过非限制性示例,它们的直径可以为大约0.07-0.4毫米。也可使用许多其它的本领域技术人员熟知的支管配置和组合。例如,可使用单个支管或接连布置几个支管。
在液压缠绕过程中,工作流体理想地在大约1300-14000kPa的压力下通过所述口。在所述压力的上限下,可预期,合成织物以大约300米/分钟的速度被处理。流体影响由有孔缠绕表面32支撑的人造短纤维层18和热塑性纤维基层20,所述表面可以是例如具有网格尺寸大约为40×40-100×100的单个平面网格。有孔缠绕表面32也可以是网格尺寸大约为50×50-200×200的多层网格。象在许多典型的喷水处理过程中一样,真空槽38可直接位于液压缠绕支管34之下或位于液压缠绕支管34下游的有孔缠绕表面32之下,以便多余的水从液压缠绕合成材料36排出。
直接影响置于热塑性纤维基层上的人造短纤维的工作流体的柱形射流将那些纤维驱入并部分通过热塑性纤维基层中的纤维的基体或非纺织网络。当流体射流和人造短纤维与热塑性纤维基层相互作用时,人造短纤维缠绕到热塑性纤维基层的纤维上并自身相互缠绕。可达到的缠绕程度取决于热塑性纤维已经结合在一起的程度。如果热塑性纤维基层结合太松散,纤维丝通常就太容易移动以至于不能形成一致的基体来固定人造短纤维。另一方面,如果热塑性纤维基层的总结合区域太大,人造短纤维的渗透性可能会很差。此外,太多的结合区域也会造成非均匀的合成纤维,因为当流体射流碰撞到大的非孔结合点时它们会泼溅和洗刷人造短纤维。如上所述,合适的结合程度提供一致的热塑性纤维,通过在仅仅一边之上液压缠绕,该纤维可形成适用于作为本发明非纺织材料中的合成层的织物,并仍提供坚固、有用的织物以及具有理想的尺寸稳定性的合成织物。
能够调整作用人造短纤维层和热塑性纤维基层的流体射流的能量,以便人造短纤维按照加强所形成的合成层的两面性的方式***连续纤维丝基层并与其缠绕。亦即,能够调整缠绕来生产一种材料,其一个表面上的主要纤维是非热塑性吸收人造短纤维,而相反表面上的主要纤维是热塑性纤维。
在流体射流处理之后,合成织物36可选择性地转到干燥操作,理想地是非压缩性干燥操作。如果需要,合成织物在转到干燥操作之前可湿法压绉。所述网的非压缩性干燥可使用图1中42所示的常规转鼓通气干燥装置完成。通气干燥机42可以是外部可旋转圆柱体44,具有多个穿孔46与一个外罩48相结合以接收吹过穿孔46的热空气。通气干燥机带50装运合成织物36通过通气干燥机外部圆柱体40的上部。强制通过通气干燥机42的外部圆柱体44上的穿孔46的加热空气除去来自合成织物36的水分。由通气干燥机42强制通过合成层的空气的温度可按照线速度、饱和度、大气状况等变化。干燥空气可被加热或等于环境温度。其它有用的通气干燥方法和装置可以在例如属于Niks的美国专利2,666,369以及属于Shaw的美国专利3,821,068中发现,在此引入前述每个参考文件的全部内容作为参考。
例如,能够按照图2所示的过程生产本发明无纺织物。如上所述的第一和第二合成层120是从第一和第二基辊解绕得来,并送入超声层压机140的夹隙142。超声层压机140的夹隙142在静态超声焊头146和旋转压花支撑辊148之间形成。然而,可以预期可将多于两个合成层层合在一起以形成本发明的无纺织物。合成层120在夹隙142内结合在一起以形成随后缠绕到最终基辊152的无纺织物150。可选地,离开超声层压机140的无纺织物150可转到随后的转化步骤,象本领域技术人员熟知的纵剪、压纹、压实、重绕等。
通过静态焊头和旋转压花支撑辊的超声波焊接在本领域是熟知的,并在例如属于GrGach等人的美国专利3,939,033和属于Rust JR的美国专利3,844,869以及属于Hill的美国专利4,259,399中有所讲授,在此引入前述每个参考文件的全部内容作为参考。也可预期,本发明的材料能够通过使用包括具有旋转压花支撑辊的旋转焊头的超声波焊接装置生产,如在例如属于Neuwirth等人的美国专利5,096,532、属于Ehlert的美国专利5,110,403以及属于Brennecke等人的美国专利5,096,532中有所讲授的,在此引入前述每个参考文件的全部内容作为参考。然而,尽管以上已经识别了特定的几种超声波焊接装置,但是相信仍还有适用于本发明的其它结合装置。
层合在一起的合成层120理想地具有上述的有边性质。每个合成层120的一个表面上主要是热塑性纤维,使其具有油布雨衣、更象塑料的感觉,而相反的表面上具有主要是非热塑性纺织吸收纤维,使其具有更柔软、更一致的感觉。当将这两个合成层层压在一起时,需要具有主要是热塑性纤维的表面面向层压结构的内侧,将具有主要是非热塑性纺织吸收纤维的表面留到外侧。按照这种方式并列合成层提高了两层的热塑性纤维之间的接触,从而提高了发生结合的数量。还将具有主要是非热塑性纺织吸收纤维的表面留到层压结构的外侧,与单板层结构相比造成不透明度提高以及改善视觉审美度和手感。将具有主要是热塑性纤维的合成层置于层压层的内部也允许未染色热塑性纤维的使用,因为在合成层层压在一起之后热塑性纤维是更加不可见的。随后就能够通过例如仅仅干燥非热塑性吸收人造短纤维生产有色擦拭物,造成生产成本降低。
尽管发明人不希望被固定到具体的操作理论,但是相信,结合区域的面积上存在的非热塑性吸收人造短纤维抑制热塑性纤维的完全融合,从而防止在结合仅仅包括热塑性纤维的网时会发生的基本上充满聚合物的结合区域的形成。图3和图4提供对比的结合区域。图3和图4中的样本浸在液氮中并使用单边刮刀沿一行结合区域对分。在没有任何导电涂层的情况下,所述对分剖面用区域发射扫描电子显微镜(FESEM))在低电压(1.2KV)下进行评定。使用具有负偏压的微通道平板探测器产生成分(电子反向散射)图像。
图3显示聚丙烯纺粘纤维网中超声波焊接区域的示例。可以看到,形成基本上充满聚合物的结合区域,基本上无孔以及无空隙率。然而,图4显示本发明无纺织物中超声波焊接区域的示例。可以看出,尽管在单个热塑性纤维之间存在结合,但是在处理区域中不存在基本上充满聚合物的结合区域。在结合区域的表面上存在多孔的迹象,并且结合区域在例如垂直于无纺织物表面的结合区域的整个z向具有空隙率。这种多孔性和空隙率允许液体在结合区域的表面进入擦拭物并从侧面流过结合区域,进入结合区域之间的擦拭物的高容量区域。
合成层之间的结合区域理想地提供足够的强度以减少使用期间分层的可能性。使用撕裂强度测试来确定结合或层压织物的合成层之间的结合强度。理想地,撕裂强度的范围在大约50-500克。更理想地,撕裂强度的范围在大约50-300克。更为理想地,撕裂强度的范围在大约50-200克。达到理想撕裂强度而不形成基本上充满聚合物的结合点的能力也使得擦拭物具有改善的感觉,使其表现出增加的布质性能和/或柔软性。尽管发明人不希望拥有具体的操作理论,但是相信这是因为没有充装聚合物的结合区域以及由于自由度增加造成纸浆纤维必须在结合区域内移动的结果。由于不存在充满聚合物的结合区域,纸浆纤维基本上不闭塞在结合区域之内。这就改善了布质性能、柔软性和/或手感。
因此,使用提供充分层合强度、在结合区域之内仍具有敞开结构的超声波焊接过程来生产本发明的无纺织物。所述结构在所有三个维度上是敞开的,不仅允许液体从结合区域的外侧流到结合区域的内侧,例如z向,而且允许液体在x向和y向的横向地流过。该过程也提供热结合材料中不会具有的柔软性、手感和/和悬垂性。理想地,通过选择和使用高超声功率输出、高线速度和低夹隙压力达到这些性能。高超声功率输出允许能量穿透合成层并在无纺织物的中间区域熔合热塑性纤维。高线速度减少停留时间并降低能够引起燃烧和/或形成孔的过度结合的可能性。低夹隙压力降低结合区域内的纤维压缩并同时避免空隙的完全消失。
合成层的超声层压能造成最终无纺织物的显著的有边性。在层压期间,压花支撑辊提供在结合步骤期间与其接触的层压材料一边的粗表面织品质地。该表面织品质地能有助于从清洗表面擦洗、去除和截留杂物。该粗表面织品质地也提供具有重复的有织纹几何形状的更大表面面积,有助于将高粘性液体清除和截留到无纺织物的表面并促进带入无纺织物的表面。液体从无纺织物的表面能够随后在z向吸入到无纺织物的中心。未层压或压花的无纺织物能够在未设置这种性质的材料的两边显示比较光滑的织品质地。
本发明的材料不限于任何特定式样设计或几何形状。可以利用提供足够点或面积以允许热塑性材料熔融、流动、结合和固化的任何设计式样。可以选择提供理想视觉外观,如作为非限制性的示例的布状外观的设计式样。示范式样包括但不限于属于Sayovitz等人的美国专利D369,907、属于Romano III等人的专利D428,267和属于Romano III等人的美国专利D428,710中所讲授的那些,在此引入前述每个参考文件的全部内容作为参考。
在合成层结合在一起之后,理想地可使用结束步骤和/或后处理过程来将所选择的性能施加给分层无纺织物。例如,织物可由砑光辊轻微挤压、压绉或刷光来提供均匀的外观和/或某种触觉性能。可选地和/或额外地,可进行将粘合剂或染料添加到织物这样的化学后处理。
本发明的无纺织物作为擦拭物材料特别有用。示范擦拭物材料的基重理想地在大约40-300gsm的范围。更理想地,示范擦拭物材料的基重大约为40-50gsm、50-60gsm、60-75gsm、75-100gsm、100-150gsm、150-200gsm或200-250gsm。更为理想地,示范擦拭物材料的基重大约为120-130gsm。擦拭物可以为任何尺寸,能够选择适用于各种擦拭任务的尺寸。示范擦拭物的宽度理想地大约为8-100厘米,更理想地为大约10-50厘米,更为理想地为20-25厘米。示范擦拭物的长度理想地为大约10-200厘米,更理想地为大约20-100厘米,更为理想地为35-45厘米。擦拭物能打包成多种形状、材料和/或容器,包括但不限于辊、盒、桶、柔性包装材料等。每包理想地包括大约10-500块擦拭物,更理想地每包包括大约50-200块擦拭物。包内的擦拭物可按多种方式折叠,包括但不限于交错折叠、C形折叠等。
本发明的无纺织物作为用于预湿擦拭物材料的基层也是有用的。无纺织物能够,通过非限制性示例,用水、无水洗手液这样的液体或其它合适的液体来处理。所述液体可包括,通过非限制性示例,防腐剂、防火剂、表面活化剂、缓和剂、保湿剂等。许多适用于湿擦拭物应用的液体和成分为熟悉本领域的技术人员所熟知。当完全饱和时,在预湿擦拭物材料的结合区域内的邻接空隙中也会至少部分充满液体,甚至全部充满液体。
测试步骤
基重:样本的基重基本上按照SSTM D3776-96确定,但有以下改变:样本的尺寸为5×5英寸的正方形。
蓬松性(Bulk):样本的蓬松性基本上按照TAPPI测试方法T411-89确定。相关的薄板卡钳(单个板层厚度)使用Emveco受控载荷千分尺确定,其模型号为200-A,可从Newberg或USA的Emveco Inc.获得。使用的载荷压力为2.0kpa,压脚直径为56.42mm。压脚降低速度为0.8毫米/秒,停留时间大约为3秒。
油水比例:测试中吸收材料的样品将吸收液体,通过测量该材料完全吸收0.1毫升液体所需的时间确定该比例。在测试中,材料的一边放有三滴液体,记录下将其完全吸收所要的时间。每个样本报告三次测试的平均值。将样本翻一边重复以上测试,以便材料的两边都得到测试。使用马达油(10W30)和水来进行测试。
油水吸收能力:吸收能力是指材料在一段时间中吸收液体的能力,与材料在其饱和点保持液体的总量有关。通过测量由于吸收液体引起材料样本的重量增加确定材料的吸收能力。测试了对于水和油(10W30)的吸收能力。4×4英寸的样本称重后浸入液体中5分钟,此后将样本移出,挂起来排液。浸在水中的样本允许排液3分钟。浸在马达油中的样本允许排液5分钟。排液之后,将样本再次称重。吸收能力可用百分比由以下方程表示为吸收液体的重量除以样本的重量:
总吸收能力=[(饱和样本重量-样本重量)/样本重量]×100
磨损:基本上按照ASTM D3884使用Taber双头旋转研磨器进行抗磨损性测试,其模型号为5130,可以从Taber Industries of NorthTonawanda,NY,USA获得。磨损测试确定当织物受到受控压力和磨损作用下的重复旋转摩擦作用时,织物对磨损的抵抗阻力。样本安装在样品保持器中,样品保持器模型号E140-15,也可从Taber Industries获得。样本接受两个直径为6.3英寸的陶瓷研磨轮的滑动旋转,模型号H-18的研磨轮也可从Taber Industries获得,以70RPM旋转而没有额外的重量施加到研磨轮上。磨损测试测量通过对于湿和干样本材料形成0.5英寸孔所需要的周数。
悬垂性(drape):样本的悬垂性硬度基本上按照ASTM D1388测量,除了该样本尺寸是1×8英寸之外。
梯形撕裂:样本的梯形撕裂强度基本上按照ASTM D1117-14测量,区别是撕裂载荷由第一载荷和最高峰值载荷的平均来计算而不是最低载荷和最高峰值载荷的平均。
Grab拉伸强度:样本的Grab拉伸强度基本上按照ASTM D5034-90测量。样本的拉伸强度测量利用Instron模型1122通用测试仪器完成,该仪器可以从Instron Corporation of Canton,MA,USA获得。拉伸强度是指将样本拉伸到断裂时所发生的最大载荷或力(亦即峰值载荷)。峰值载荷的测量在加工方向或横向加工方向上完成。例如,对于测量为4英寸宽、6英寸长(拉伸方向)的样本,测量结果的用力(克)的单位表示。
剥离强度测试:剥离强度基本上按照ASTM D2724.13确定。该过程想要确定层压织物的z向强度(结合强度)。织物的合成层之间结合的有效性可通过测量将织物分层的所需要力来确定。分层定义为由于结合力失效引起层压织物的板层的分离。剥离强度是在指定条件下分离织品的合成层所需的张力。在该过程中,6×2英寸样本(6英寸在加工方向)的板层用手工沿样本的长度分离大约2英寸。一层随后夹入具有量规长度为1英寸的张力测试机械的每个钳夹,并测试完全分离织物的合成层所需的最大力(亦即峰值载荷)。每组样本测试7个样品并计算平均峰值载荷。结果按照力的单位表示。数值越高代表织物结合得越牢固。
示例
将按照本发明的两层超声波焊接的无纺织物与未结合的单板层擦拭物材料进行比较。2一板层无纺织物的每个合成层包括大约14gsm聚丙烯纺粘纤维和大约53gsm北方软木牛皮纸浆纤维。每个合成层按照属于Everhart等人的美国专利5,284,703制成,其中合成层的一个表面主要是聚丙烯纺粘纤维,相反表面上主要是纸浆纤维。两个合成层通过超声层压机将主要聚丙烯纺粘纤维的表面相互面对,以形成大约134gsm的主要是大量纸浆纤维表面的无纺织物。层压机是Branson超声单元,模型号2000BDC,可从Branson Ultrasonic Corporation ofDanbury,CT,USA获得,其具有9英寸的静态焊头。两个合成层使用具有属于Romano III等人的美国专利D428,267中所述式样的压花支撑辊结合在一起。来自焊头的功率输出设为最大功率水平,而线速度增加到大约85米/分钟以防止燃烧。在夹隙之内的压力通过调整超声焊头和压花支撑辊之间的间隔来最小化以达到足够的撕裂强度,同时防止结合区域的过度压缩。用作比较的单板层材料大约为135gsm液压缠绕成分,其包括按照美国专利5,284,703制造的大约29gsm的聚丙烯纺粘纤维和大约106gsm的纸浆纤维。
表1提供了这两种材料的比较。从表1可见,通过对于水和油的吸收率和吸收容量的测量,两层无纺织物的吸收性能增加。由蓬松性的增加和悬垂性的降低指示,两层无纺织物也具备改善的触觉性能。两种材料之间的耐用性的性能指标,亦即抗磨损性、撕裂强度和抗张强度,基本相同。
表1两层和单层材料性能的比较
性能 | 两层 | 单层 |
基重(gsm) | 134.9 | 134.5 |
纸浆百分比 | 78.8 | 78.3 |
聚丙烯百分比 | 21.2 | 21.7 |
蓬松性(内) | .0320 | .0233 |
马达油吸收速度(秒) | 25 | 78 |
马达油吸收容量(克) | 6.0 | 4.3 |
水的吸收速度(秒) | 0.70 | 1.05 |
水的容量(克) | 6.9 | 4.85 |
磨损,干样本(周数) | 212 | 175 |
磨损,湿样本(周数) | 226 | 313 |
撕裂强度,md(克) | 92 | N/A |
撕裂强度,cd(克) | 91 | N/A |
悬垂性,md(厘米) | 3.4 | 3.9 |
悬垂性,cd(厘米) | 2.5 | 2.9 |
梯形撕裂,md(磅) | 6.4 | 6.9 |
梯形撕裂,cd(磅) | 3.3 | 4.8 |
抗张强度,md(磅) | 21.5 | 25.6 |
抗张强度,cd(磅) | 16.6 | 19.0 |
尽管本发明已按照其特定的实施例、特别是通过在此所述的示例详细说明,但是对于熟悉本领域的技术人员将显而易见,在不背离本发明的精神和范围的情况下,本发明有多种变更、修改和其它改变。因此所有这些修改、变更和其它改变都包含在随后的权利要求中。
Claims (16)
1.一种无纺织物,包含:
第一合成层,所述第一合成层包括重量占50%-90%的非热塑性吸收人造短纤维和重量占10%-50%的热塑性纤维,其中第一合成层的第一外表面上的主要纤维包括非热塑性吸收人造短纤维,另外第一合成层的第二外表面上的主要纤维包括热塑性纤维;
第二合成层,所述第二合成层包括重量占50%-90%的非热塑性吸收人造短纤维和重量占10%-50%的热塑性纤维,
其中第二合成层的第一外表面上的主要纤维包括非热塑性吸收人造短纤维,另外第二合成层的第二外表面上的主要纤维包括热塑性纤维,此外,所述第二合成层的第二外表面与所述第一合成层的第二外表面相邻;以及:
结合区域,其中所述第一合成层的一部分所述热塑性纤维熔合到所述第二合成层的一部分所述热塑性纤维,另外该结合区域具有多个邻接空隙。
2.如权利要求1所述的无纺织物,其中所述结合区域包括分散结合点。
3.如权利要求1所述的无纺织物,其中所述结合区域在z向是多孔的。
4.如权利要求1所述的无纺织物,其中所述邻接空隙允许被吸收液体在结合区域内流动。
5.如权利要求1所述的无纺织物,其中所述结合区域在x向和y向是多孔的。
6.如权利要求1所述的无纺织物,其中所述结合区域在x向和y向和z向是多孔的。
7.如权利要求1所述的无纺织物,其中无纺织物的剥离强度在50-500克之间。
8.如权利要求1所述的无纺织物,其中无纺织物的剥离强度在50-300克之间,另外,无纺织物的基重在40-300gsm之间。
9.如权利要求1所述的无纺织物,其中所述结合区域是用超声波焊接的。
10.如权利要求1所述的无纺织物,其中非热塑性吸收人造短纤维包括纸浆纤维。
11.如权利要求1所述的无纺织物,其中热塑性纤维包括连续的纤维丝。
12.如权利要求1所述的无纺织物,其中热塑性纤维包括聚丙烯纤维。
13.一种无纺织物,包含:
第一合成层,所述第一合成层包括重量占50%-90%的吸收纸浆纤维和重量占10%-50%的基本上连续的聚丙烯纤维丝,其中,第一合成层之内的所述吸收纸浆纤维和所述基本上连续的聚丙烯纤维丝缠绕在一起,另外,第一合成层的第一外表面上的主要纤维包括吸收纸浆纤维,此外,第一合成层的第二外表面上的主要纤维包括基本上连续的聚丙烯纤维丝;
第二合成层,所述第二合成层包括重量占50%-90%的吸收纸浆纤维和重量占10%-50%的基本上连续的聚丙烯纤维丝,其中,第二合成层之内的所述吸收纸浆纤维和所述基本上连续的聚丙烯纤维丝缠绕在一起,另外,第二合成层的第一外表面上的主要纤维包括吸收纸浆纤维,此外,第二合成层的第二外表面上的主要纤维包括基本上连续的聚丙烯纤维丝,此外,所述第二合成层的第二外表面与所述第一合成层的第二外表面相邻;以及:
结合区域,在该结合区域中所述第一合成层的一部分所述基本上连续的聚丙烯纤维丝熔合到第二合成层的一部分所述基本上连续的聚丙烯纤维丝,另外该结合区域具有多个邻接空隙;其中,所述无纺织物的剥离强度在50-500克之间。
14.如权利要求13所述的无纺织物,其中所述结合区域在z向是多孔的。
15.如权利要求13所述的无纺织物,其中所述结合区域是用超声波焊接的。
16.包括如权利要求13所述的无纺织物的擦拭物,所述无纺织物的基重在40-300gsm之间。
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- 2002-09-09 US US10/237,455 patent/US6992028B2/en not_active Expired - Lifetime
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2003
- 2003-08-08 EP EP03794462A patent/EP1537268B1/en not_active Expired - Lifetime
- 2003-08-08 RU RU2005104937A patent/RU2328377C2/ru active
- 2003-08-08 MX MXPA05002023A patent/MXPA05002023A/es active IP Right Grant
- 2003-08-08 WO PCT/US2003/024872 patent/WO2004022832A1/en active Application Filing
- 2003-08-08 DE DE60324946T patent/DE60324946D1/de not_active Expired - Lifetime
- 2003-08-08 CA CA002496582A patent/CA2496582C/en not_active Expired - Lifetime
- 2003-08-08 KR KR1020057002973A patent/KR101028321B1/ko active IP Right Grant
- 2003-08-08 BR BRPI0313742-2A patent/BR0313742B1/pt active IP Right Grant
- 2003-08-08 CN CNB038200279A patent/CN100436690C/zh not_active Expired - Lifetime
- 2003-08-08 JP JP2004534274A patent/JP4521274B2/ja not_active Expired - Lifetime
- 2003-08-08 AU AU2003259075A patent/AU2003259075B2/en not_active Expired
- 2003-09-03 AR ARP030103195 patent/AR041140A1/es not_active Application Discontinuation
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- 2005-02-23 ZA ZA200501598A patent/ZA200501598B/xx unknown
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Publication number | Priority date | Publication date | Assignee | Title |
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CN110691695A (zh) * | 2017-07-06 | 2020-01-14 | 惠普发展公司,有限责任合伙企业 | 织物印刷介质 |
CN110691695B (zh) * | 2017-07-06 | 2022-04-15 | 惠普发展公司,有限责任合伙企业 | 织物印刷介质 |
Also Published As
Publication number | Publication date |
---|---|
EP1537268A1 (en) | 2005-06-08 |
JP2005538264A (ja) | 2005-12-15 |
US6992028B2 (en) | 2006-01-31 |
KR20050058430A (ko) | 2005-06-16 |
BR0313742B1 (pt) | 2014-04-29 |
MXPA05002023A (es) | 2005-06-03 |
EP1537268B1 (en) | 2008-11-26 |
CN1678785A (zh) | 2005-10-05 |
KR101028321B1 (ko) | 2011-04-12 |
AU2003259075B2 (en) | 2008-07-31 |
CA2496582C (en) | 2009-05-12 |
BR0313742A (pt) | 2005-07-12 |
DE60324946D1 (de) | 2009-01-08 |
RU2328377C2 (ru) | 2008-07-10 |
AU2003259075A1 (en) | 2004-03-29 |
ZA200501598B (en) | 2006-04-26 |
AR041140A1 (es) | 2005-05-04 |
WO2004022832A1 (en) | 2004-03-18 |
CA2496582A1 (en) | 2004-03-18 |
RU2005104937A (ru) | 2005-09-20 |
US20040048542A1 (en) | 2004-03-11 |
JP4521274B2 (ja) | 2010-08-11 |
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