CN1308522C - 复合无纺织物的生产方法 - Google Patents
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Abstract
一种复合无纺织物由包括短聚酯纤维的合成纤维网(10)和包括木浆纤维的纤维素纤维网(11)组成。在各网结合成一体之前,合成纤维网须经水刺以形成局部缠结网,然后,将纤维素纤维网与局部缠结网并置,以便网的水刺和结合。预缠结合成纤维网起到减少纤维素纤维网与合成纤维网结合所需要的能量输入的作用,并且也起到减少水刺和结合纤维网期间纤维素纤维损失的作用。
Description
技术领域
本发明涉及一种水刺(射流喷网)无纺织物,尤其是涉及一种由合成纤维网和纤维素纤维网构成的水刺复合无纺织物,其纤维网是一体的以便纤维素纤维和合成纤维组织相结合。这样合成的织物具有很高的强度和良好的吸水性,其特别适用于做医疗大褂和类似的应用。
背景技术
由于无纺织物具有多用性,人们已经发现它的广泛用途,其多用性是通过以可选择方式设计这种织物物理特性而获得的。由于构成织物的纤维或单纤维可有效结合为一体并且能按照特定用途要求进行定位,所以通过水刺法(射流喷网法)形成的无纺织物更有优势。通过水刺不同种类的纤维混合物可以很容易结合在一起,以至于能够制造具有特选物理性能的织物。
到目前为止,人们已经知道了由合成纤维和纤维素纤维混合制成的无纺织物,其表现出由合成纤维和纤维素纤维组成的理想物理特性。一般,合成纤维能够制成织物,以至于获得的织物具有良好的耐蚀性和抗拉强度。纤维素纤维的使用使这种织物具有了理想的吸水性和柔软性。
这里通过参考而结合的Oathout申请的专利号为US5,459,912披露了一种由合成纤维和木浆制成的有图案射流喷网织物,所用木浆据说具有很好吸水性和较少颗粒数。因而这种织物适合于在要求有这些特性的地方使用,比如用作洁净室内的拖布,食品服务业的抹布和其它类似用途。但是,该专利旨在设计干燥的状态下将木浆纤维和合成纤维相结合,随后的水刺仅仅处理其一侧。这导致了严重损失与合成纤维松散地结合在一起的木浆纤维材料,因而降低了加工过程的效率。
因为由合成纤维和纤维素纤维制成的复合无纺织物材料具有组合的理想物理特性,本发明旨在提供一种制造这种复合无纺织物的方法,该方法有利于在水刺法合成织物期间,通过减少损失到滤液中的纤维素纤维而提高织物形成的效率。
发明内容
本发明旨在提供一种制造复合无纺织物的方法,所述方法需要短合成纤维网和纤维素纤维网(典型的是木浆)结合成一体。为了降低在水刺法合成织物期间的纤维素纤维损失,本发明提出:合成纤维网首先受到水刺,然后通过水刺将纤维素纤维材料结合成局部缠结的合成纤维网中。已经发现这种制造工艺按要求减少在水刺过程中损失到水刺所使用的滤液中的纤维素纤维。合成的织物具有通过使用合成纤维和纤维素纤维而得到的合乎要求的混合特性,同时本发明的制造工艺利于高效率地形成织物并且所需成本较低。
按照本发明,一种制造复合无纺织物的方法包括提供含有短聚合纤维的合成纤维网步骤。目前,由于制造和加工聚酯纤维(PET)较经济,因而优选使用它。本工艺过程还包括水刺合成纤维以形成局部缠结网状结构。在使用相关的纤维素纤维材料之前,这种局部水刺起到合成短合成纤维的作用。
通过将纤维素纤维网与局部缠结合成纤维网并置来使用本织物中的纤维素纤维材料。然后水刺并置的缠结网,并且随后干燥形成复合无纺织物。特别是,在引入纤维素纤维材料之前,当通过水刺将合成纤维网与纤维素纤维网结合成一体时,预缠结合成纤维网能理想地减少纤维素材料的损失。预缠结合成纤维网可以起到过滤纤维素纤维材料的作用,以便最大程度地减少损失在滤液中。此外,预缠结合成纤维网允许使用供合成纤维网与纤维素纤维网缠结的低能量输入,同时它也有助于减少纤维素纤维的损失。使用供缠结各组成网的低能量输入的能力允许保持复合无纺织物的固有厚度,并因随着高压水刺无纺织物,其隙间体积的增大而导致吸水能力的提高。
从下面的详细描述、附图中可以清楚理解本发明的其它特征和优点。
附图说明
图1是制造体现本发明原理复合无纺织网的装置的示意图。
具体实施方式
本发明容许有不同形式的具体实施方式,图中所示的及下文中将要描述的是目前的优选实施例,目前公开的内容将被看作是本发明的一个例子,并且其目的不在于将本发明限定在所描述的具体实施例范围内。
参照附图1,该图示意性示出实施生产复合无纺织物的方法的装置,该方法体现了本发明原理。本复合织物最好由并置的合成纤维网和纤维素纤维网组成,该并置的合成纤维网和纤维素纤维网须经射向它的高压液体流的水刺,最好先对着并置网的一个可膨胀(expansive)表面,此后对着并置网的相对可膨胀表面。在本发明范围内每一合成纤维网和纤维素纤维网均可以具有多种形式,因此容许不同类型的合成纤维和/或不同类型的纤维素纤维结合成一体。每一合成纤维网和纤维素纤维网可由同性质组成成分的网构成,或者作为可选择的方案,由不同组成成分的混合物构成也在本发明的范围内。
目前,在优先使用的本发明中,合成纤维具有短聚酯纤维的形式,而纤维素纤维具有木浆纤维的形式,所述木浆纤维采用湿法定向纤维网形式,所述湿法定向纤维网通常指的是“薄纸”,随后通过水刺将其与合成纤维网相结合。特别的是,本发明设计出在水刺纤维素纤维网之前对合成纤维网进行水刺以形成局部缠结网。已经发现这种形式的组成物能减少在水刺合成纤维网期间纤维素纤维的损失。此外,已经发现预缠结合成纤维网容许在其与纤维素纤维网结合成一体期间施加较低的缠结压力,这也减少了在水刺期间损失到滤液中的纤维素纤维。
如图1所示,本发明设计出的制造本发明复合织物所采用的合成纤维网包括能与气流法合成纤维网11相结合的已梳的或平行的短纤维网10,能够适当地在气流成网装置12上形成气流合成法纤维网。本发明设计出通过水刺将已梳网和气流法成网并置并且结合为一体以形成局部缠结的合成纤维网。最后,引导已梳网和气流法网绕过缠结滚筒14,同时将高压液体流射向并置的网以实现结合和局部缠结。通过二次缠结滚筒16的作用能进一步实现网的局部缠结,此后,引导局部缠结合成纤维网沿着缠结带18。
在加工工序中的这个阶段,将纤维素纤维网19和局部缠结的合成纤维网并置以形成本复合无纺织物。纤维素纤维网最好具有湿法定向纤维网的形式,但是具有其它形式的纤维素纤维材料也落入本发明的范围内。并置的合成纤维网和纤维素纤维网须受到低压液体流作用下的水刺,所述低压液体流由位于缠结带18上方合适的歧管20产生。
按照本发明的优选实施方式,来自歧管20的低压液体流射向并置网的可膨胀表面。此后,引导网饶过相对的缠结滚筒22,同时低压液体流射向网的相对可膨胀表面。转移结合成一体的网到脱水槽24上,然后在26处干燥并缠绕以供贮存和运输。
附表中给出的数据比较了本工艺过程中能量输入和依照US5,459,912教导的能量输入。该数据表明,折算成英制马力小时/磅能量输入的工艺过程是相似的。但是,当比较两个不同过程的撞击能(Hp-hr-lbf/lbm;英制马力-小时/磅力/磅质量;参见专利号为5,549,912美国专利第6栏3-25行)时,很明显,本发明过程耗费了较少的撞击能,除此之外,该过程中液体的流速稍大以实现织物的理想结合,同时还减少了加工中纤维素纤维的损失。由于高流速补偿了需要的高撞击能,因此本发明中较低的撞击能致使纤维断裂更少。然而,输入足够能量使合成的无纺织物具有所要求的物理性能,如柔软性,耐磨性和其它合乎要求的使用性能。
实施例
图1示出了该装置,使用0.55盎司每平方码的气流合成纤维生产出体现本发明原理的无纺织物,所述气流法合成纤维是依照通过参考而结合的US4,475,271和US5,007,inch137公开的方法生产出来的。这种气流法合成纤维网与0.37盎司每平方码的标准已梳网相结合以形成重达1.0盎司每平方码和由100%聚酯短纤维组成的合成纤维网。这些网的原料:310P聚酯短纤维,1.5旦尼尔×1.5英寸(由Wellman Inc.生产)是市场上可以买得到的。
如图1所示,在滚筒14和16上,按照附表中表明的工艺条件,预缠结气流法合成纤维网和已梳合成纤维网。然后,将局部缠结的合成网转移到缠结带18上。纤维素纤维网具有市场上可以买得到的H431XL,31#每令纸(商业上可从Crown Vantage得到)形式,由此按照本发明的优选实施方式纤维素纤维网包含了木浆纤维。将纤维素纤维网并置在局部缠结的合成纤维网上部,依照所附的工艺数据,在缠结带上缠结并置网。
然后,引导结合成一体的合成纤维网和纤维素纤维网绕过缠结滚筒22,所述缠结滚筒表层缠绕着22×23的扁平铜经线(可从Albany International买到)。至此,低压液体流射向并置网的相对可膨胀表面。喷水量孔按照附表中的数据喷射液体流。
接着将已结合成一体的网转移到脱水槽24上,然后在干燥器26上干燥。在本实施例中不使用图1所示的轧辊28,目的是保持最终的复合无纺织物具有较强的吸水能力。在26上干燥后缠绕以形成织物。
可以这样理解,按照本发明形成的织物不须经水刺处理。所述水刺处理是当织物形成时将液压喷水量孔对着织物的两个可膨胀的表面。此外,图示轧辊可用来提高织物密度,并且可降低干燥之前的网含水量。
据以上所述,可以作出各种改进和改变而不背离本发明新颖性构思的精神和范围。可以理解,本发明不限于这里公开的特别实施例。公开的是通过附加权利要求覆盖所有落入该权利要求范围内的改进。
Claims (8)
1.一种生产复合无纺织物的方法,其包括以下步骤:
提供含有短聚酯纤维的合成纤维网;
水刺所述合成纤维网以形成局部缠结网;
将纤维素纤维网与所述局部缠结网并置;
水刺所述并置的局部缠结网和纤维素纤维网;及
干燥所述水刺的网以形成所述复合无纺织物。
2.根据权利要求1所述的一种生产复合无纺织物的方法,
其特征在于:
所述提供所述合成纤维网的步骤包括提供气流法合成纤维网和已梳合成纤维网,所述气流法合成纤维网和已梳合成纤维网已经水刺而形成所述局部缠结网。
3.根据权利要求1所述的一种生产复合无纺织物的方法,
其特征在于:所述纤维素纤维网包括木浆纤维。
4.根据权利要求1所述的一种生产复合无纺织物的方法,
其特征在于:
水刺所述并置网的所述步骤包括先将低压液体流射向所述并置网的第一可膨胀表面,此后将低压液体流射向所述并置网的相对可膨胀表面。
5.一种生产复合无纺织物的方法,其包括以下步骤:
通过将气流法短聚酯纤维网和已梳短聚酯纤维网并置而提供合成纤维网;
通过水刺所述并置的气流法网和已梳网以形成局部缠结的合成纤维网;
将包括木浆的纸网与所述局部缠结的网并置;
水刺所述并置的局部缠结网和所述纸网以将所述纸网的木浆纤维与所述局部缠结网的短聚酯纤维结合成一体;及
干燥所述水刺的网以形成所述复合无纺织物。
6.根据权利要求5所述的一种生产复合无纺织物的方法,
其特征在于:
水刺所述并置的局部缠结网和纸网的所述步骤包括:先将高压液体流射向并置网的第一可膨胀表面,然后将高压液体流射向所述并置网的相对可膨胀表面。
7.根据权利要求5所述的一种生产复合无纺织物的方法,
其特征在于:
所述气流法网包括100%聚酯纤维。
8.根据权利要求5所述的一种生产复合无纺织物的方法,
其特征在于:
所述已梳网包括100%聚酯纤维。
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US09/815,527 US6381817B1 (en) | 2001-03-23 | 2001-03-23 | Composite nonwoven fabric |
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EP (1) | EP1303661A1 (zh) |
JP (1) | JP2004519565A (zh) |
CN (1) | CN1308522C (zh) |
AU (1) | AU2002255744B2 (zh) |
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DE10008746A1 (de) * | 2000-02-24 | 2001-08-30 | Fleissner Maschf Gmbh Co | Verfahren und Vorrichtung zur Herstellung von Verbundvliesstoffen mittels hydrodynamischer Vernadelung |
WO2002068081A2 (en) * | 2001-01-17 | 2002-09-06 | Polymer Group Inc. | Hydroentangled filter media and method |
EP1444076A4 (en) * | 2001-09-21 | 2005-04-13 | Polymer Group Inc | NON-CONVENIENT DIAPHANES WITH ENHANCED ABRASIVE PERFORMANCE |
US20030118776A1 (en) * | 2001-12-20 | 2003-06-26 | Kimberly-Clark Worldwide, Inc. | Entangled fabrics |
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- 2002-03-14 CN CNB028007913A patent/CN1308522C/zh not_active Expired - Fee Related
- 2002-03-14 CA CA002409662A patent/CA2409662C/en not_active Expired - Lifetime
- 2002-03-14 EP EP20020725161 patent/EP1303661A1/en not_active Withdrawn
- 2002-03-14 WO PCT/US2002/007799 patent/WO2002077348A1/en active Application Filing
- 2002-03-14 JP JP2002575378A patent/JP2004519565A/ja active Pending
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Also Published As
Publication number | Publication date |
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EP1303661A1 (en) | 2003-04-23 |
AU2002255744B2 (en) | 2007-01-04 |
JP2004519565A (ja) | 2004-07-02 |
CA2409662A1 (en) | 2002-10-03 |
US6516502B1 (en) | 2003-02-11 |
WO2002077348A1 (en) | 2002-10-03 |
AU2002255744B9 (en) | 2002-10-08 |
US6381817B1 (en) | 2002-05-07 |
CA2409662C (en) | 2010-02-02 |
CN1460140A (zh) | 2003-12-03 |
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