CN1119930A - 用于一次性尿布的粘接方法 - Google Patents
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- A61F13/00—Bandages or dressings; Absorbent pads
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Abstract
一种用于一次性尿布的粘接方法,包括这些步骤:将设置于包括一上片、一底片和一夹于两者之间的芯的前、后身5、6上的翼状部分相互对叠起来,使所述上片面对面叠置;将熔点高于所述底片之熔点的包覆片放在熔点高于所述底片之熔点的所述翼状部分的外表面上;然后,在从所述包覆片外侧施加的热和压力作用下把所述翼状部分的横向相对边缘粘接起来。
Description
本发明涉及一种用于沿一次性尿布的腰部高度上的横向相对两边将其边缘粘接起来的方法。
日本专利申请公开第1993—15551号揭示了一例内裤式一次性尿布,根据该申请,一种包括上片、底片和一夹于两者之间的液体吸收芯的尿布沿穿过裆部的中心线向上对叠起来,将前、后身对置并沿其腰部高度上的横向相对两边缘用超声波将上、底片粘接在一起,以得到一内裤式结构形状。上、底片都可用例如适于由超声波处理熔化的热塑性合成树脂的无纺布制成。
所述专利公开揭示的技术中用作上、底片的无纺布可由如上所述的同一类型的纤维组成并且被熔化至无纺布呈现出一合适的粘性,以便上、底片的粘接区可具有一种光滑的成品外观。但是,如果将由熔点相对较高的聚丙烯纤维的无纺布制成的上片与由熔点相对较低的聚乙烯薄膜制成的底片一起使用,在将尿布向上叠起形成内裤式样并进行超声波处理时,聚乙烯薄膜会比聚丙烯纤维早熔化。结果,聚乙烯薄膜可能熔化至一过低的粘性并粘到为进行超声波处理已压在薄膜上的焊头上。粘在焊接上的聚乙烯薄膜在冷却后会呈现出一种对穿着者皮肤有刺痒作用和不舒适感并有损尿布美观的粗糙表面。如果聚乙烯粘留在焊头上,在处理的下一周期中,在用于超声波处理的焊头和砧座之间就不能保证精确的间隙,这样就很难进行连续处理。
因此,本发明的一个主要目的是通过将一熔点高于底片熔点的包覆片放在底片的外表面上并使之与诸如用于超声波处理的焊头的压接装置接触来解决上述现有技术中存在的问题。
根据本发明,上文提出的目的通过一种用于一次性尿布的粘接方法来实现。该方法大体包括这些步骤:将一液体可渗透的上片、一液体不可渗透的底片和夹在两者之间的液体吸收芯组合成一次性尿布的结构形状;将从所述芯的横向相对两侧边缘向外延伸的前、后身的翼状部分对叠起来;然后,将对叠起来的翼状部分在热和压力作用下粘接到一起,形成在所述前、后身的腰部高度上的两个相对的侧部。所述粘接方法还包括这些步骤:将与所述上片相连以形成其延伸部分的上片构件与由熔点低于所述上片构件之熔点的材料制成的底片组合形成所述翼状部分;将所述翼状部分相互对叠起来,使所述上片构件在所述尿布内侧面对面地对置;将熔点高于所述底片之熔点的包覆片放在所述底片的外表面上;然后沿所述翼状部分之横向相对两侧缘将其与所述包覆片粘接在一起。
所述包覆片的熔点最好高于所述上片构件的熔点。
根据如上所述的粘接方法,用诸如有所希望形状的超声波焊头或加热元件的加热/加压装置压在将被粘接在一起的部分上。为防止熔融的底片粘在加压/加热装置上,将熔点高于底片熔点的包覆片与加热/加压装置接触。
现参照附图对本发明的粘接方法作更详细的描述,其中:
图1是内裤式一次性尿布的立体图;
图2是尿布展开时的俯视图;
图3是沿图2中的线X—X的剖视图;
图4是表示超声波处理的示意图;
图5A和5B是具有不同外形的粘接区的剖视图;和
图6A和6B是类似于图3但示出不同结构形状的视图。
图1是示出用本发明的粘接方式得到的内裤式一次性尿布1的立体图。该尿布1包括一由熔合粘结的聚丙烯纤维无纺布制成的液体可渗透的上片2、一由聚乙烯薄膜制成的不可渗透底片3和夹在上片2和底片3之间的液体吸收芯4。尿布1也可以大体上说是由一前身5、一后身6和一裆部7构成。腰部开口11和两腿部开口12分别设有沿其周边粘接的可弹性伸展的构件13、14。将前身5和后身6对折地叠起来,使上片2面对面地折叠在尿布1内,并且,沿着前身5和后身6之腰部的模向相对两侧在底片3加上包覆片20,以便用沿腰部的横向两侧垂直延伸的超声波间断粘接线(见标号15)将片2、3和20粘接在一起。
图2是在所述粘接前,前、后身5、6纵向展开并剖去一局部时尿布1A的俯视图。尿布1A中,从液体吸收芯4的横向侧缘向外延伸的前、后身5、6的腰部分别形成翼状部分21、22。应能理解,这些翼状部分21、22可以通过将具有所需特性的上片构件和/或底片构件粘合于上片和/或底片以形成除所述上、底片之外的它们的延伸部分来构成。底片3的翼状部分21、22的边上有上述聚丙烯包覆片20。在翼状部分21、22的内侧,在尿布1A的横向相对两侧设有一对在上片2上纵向延伸的翼片31。每个翼片31沿其外边缘25和纵向相对的两端26、27粘合于上片2以便在以拉伸状态粘合于其内边缘28的弹性件29的作用下,内边缘28可皱立起来。
图3是沿图2中的线X—X的剖视图。在此,应能理解,沿图2中的线Y—Y的剖视图与图3基本相同。沿着尿布1A的每一翼状部分21的整个长度,用热熔胶33把上片2和底片3相互间断地粘合,并且,将底片3和包覆片20也用热熔胶33相互间断地粘合。每一翼片31和上片2共同构成一个向尿布1A内开口的袋囊。如果必要,液体吸收芯4可粘合于上片2和/或底片3。
图4是一表示尿布1A的折叠和粘接方式的示意侧视图,将所述尿布1A沿图2中的中心线C—C向内对折起来然后用一超声波粘接机40把叠合在一起的前身和后身的翼状部分21和22粘接起来。粘接机40可以是现有技术类型的,并且包括一连接于一超声波振荡器(未示出)的焊头41和一固定的砧座42。翼状部分21、22放在它们之间并由其粘接在一起,从而形成一与焊头41的前端形状相一致的粘接区15(图1)。
在尿布1A的超声波处理中,必须选择最佳处理状态来将上片2的相互叠靠的部分粘接在一起。在这种处理过程中,由于构成底片3的聚乙烯薄膜的熔点比构成上片2的聚丙烯无纺布的熔点低,所以它会较早变得发粘,为了防止聚乙烯薄膜(底片3)粘到焊头41上,将聚丙烯的包覆片20放在聚乙烯薄膜(底片3)和焊头41之间。
图5A、5B是通过超声波处理得到的粘接区的示意侧视图,其中图5A示出了根据本发明的方法采用包覆片20得到的粘接区15,而图5B示出了没采用包覆片20的情况。图5A所示的情况中,聚乙烯薄膜(底片3)的粘性减小不明显,因而粘接是在一种相当粘的熔化状态下进行,所以,焊头升压在粘接区15上的压痕是圆的,结果形成一不会刺激穿着者皮肤的光滑表面。另一方面,图5B所示的情况中,在聚丙烯片(上片2)的熔化状态有较高的粘性时,聚乙烯薄膜(底片3)熔化了并粘在焊头41和砧座42上,所以,冷却后的粘接区15a呈现出一种粗糙的表面,其对穿着者的皮肤会有一种刺痒作用。
图6A、6B是示出结构彼此不同且不同于图3所示结构的剖视图。图6A中,上片2的从芯4的横向相对两侧缘向外延伸的部分极小。但是,用热熔胶33粘合于上片2的两翼片31的外延区域25却相对较大并与底片3共同形成翼状部分21。前身5和后身6(见图2)沿两者之间的边界线叠起来,将外延区域25一起置于前身5的边上和后身6的边上,因而这些区域25受到超声波处理。每个翼片31都是由精细的聚丙烯无纺布制成。在图6B中,各翼状部分21的上片构件包括覆盖着相关外延区域25的精细的聚丙烯无纺布包覆片37。上片2、区域25和包覆片37用热熔胶33粘合在一起。前、后身5、6彼此相对地叠起,将包覆片37放在前身5的边上,又将包覆片放在后身6的边上,然后对这一区域进行超声波处理。在图6A和6B所示的结构中,底片3是用聚乙烯薄膜制成的。
在不偏离本发明的的情况下,也可用具有不同熔点的混合纤维制成上片构件、底片3和包覆片20。在此,每一片中的不同熔点应理解为总地占该片重量的60%或更高的组成纤维之间的不同熔点。
包覆片20的熔点应高于构成底片3的材料的熔点,并且,最好等于或高于上片构件的熔点,以便于在热效应下容易形成一种所希望的浅而小的压痕。
在像本发明的一个实施例的尿布1A那样由聚丙烯组成的无纺布构成的上片2和上片构件时,有一个相对较高牢度的聚丙烯纤维会使无纺布柔软,这取决于细度和密度,并且尿布1在穿到身上时会给穿戴者一种舒适的感觉。用聚乙烯薄膜作为底片3,会使价格相对便宜,而且提供一种舒适、柔软的触感。
应能理解,包覆片20的尺寸可设计成包覆住底片3的必要区域或整个区域并且预先层叠在其上。
根据本发明的粘接方法,为了防止熔化的底片粘到加热/加压装置上,将熔点高于底片的熔点的包覆片放在诸如超声波焊头的加热/加压装置和底片之间,从而避免了现有技术没有解决的问题,即,粘接区冷却后呈现出一种会对穿着者皮肤有刺痒作用和/或有损尿布美观的粗糙表面。而且,由于没有熔化的薄膜材料粘在焊头上,所以超声波处理工艺非常稳定。
Claims (3)
1.一种用于一次性尿布的粘接方法,它大体包括这些步骤:将一液体中渗透的上片、一液体不可渗透的底片和夹在两者之间的液体吸收芯组合成一次性尿布的结构形状;将从所述芯的横向相对两侧边缘向外延伸的前、后身的翼状部分对叠起来然后,将对叠起来的翼状部分在热和压力作用下粘接到一起,形成在所述前、后身的腰部高度上的两个相对的侧部;所述粘接方法还包括这些步骤:将与所述上片相连以形成其延伸部分的上片构件与由熔点低于所述上片构件熔点的材料制成的底片组合形成所述翼状部分;将所述翼状部分相互对叠起来,使所述上片构件在所述尿布内侧面对面地对置;将熔点高于所述底片之熔点的包覆片放在所述底片的外表面上;然后沿所述翼状部分之横向相对两侧缘将其与所述包覆片粘接在一起。
2.如权利要求1所述的一次性尿布,其特征在于,所述上片构件是所述上片的从所述芯的横向侧缘向外延伸的一部分。
3.如权利要求1所述的一次性尿布,其特征在于,所述上片构件是粘合在所述翼状部分的所述底片上的一独立的膜片。
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-
1993
- 1993-05-19 JP JP11734593A patent/JP3205643B2/ja not_active Expired - Lifetime
-
1994
- 1994-05-16 ES ES94870082T patent/ES2109655T5/es not_active Expired - Lifetime
- 1994-05-16 DE DE69404747T patent/DE69404747T3/de not_active Expired - Lifetime
- 1994-05-16 AU AU63138/94A patent/AU679219B2/en not_active Expired
- 1994-05-16 US US08/242,975 patent/US5628738A/en not_active Expired - Lifetime
- 1994-05-16 EP EP94870082A patent/EP0625346B2/en not_active Expired - Lifetime
- 1994-05-17 CA CA002123755A patent/CA2123755C/en not_active Expired - Lifetime
- 1994-05-19 MY MYPI94001279A patent/MY115151A/en unknown
- 1994-05-19 CN CN94105609A patent/CN1089575C/zh not_active Expired - Lifetime
- 1994-05-19 GB GB9410079A patent/GB2279229B/en not_active Expired - Lifetime
- 1994-05-19 KR KR1019940010871A patent/KR100298379B1/ko not_active IP Right Cessation
- 1994-05-19 SG SG1996003637A patent/SG52371A1/en unknown
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1995
- 1995-03-31 US US08/414,570 patent/US5618366A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110613556A (zh) * | 2019-09-17 | 2019-12-27 | 福建恒安集团有限公司 | 一种吸收性物品的制备方法 |
Also Published As
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AU6313894A (en) | 1994-11-24 |
KR100298379B1 (ko) | 2001-10-24 |
DE69404747T2 (de) | 1998-01-08 |
GB2279229B (en) | 1997-06-25 |
GB9410079D0 (en) | 1994-07-06 |
EP0625346B1 (en) | 1997-08-06 |
DE69404747D1 (de) | 1997-09-11 |
MY115151A (en) | 2003-04-30 |
US5628738A (en) | 1997-05-13 |
CN1089575C (zh) | 2002-08-28 |
US5618366A (en) | 1997-04-08 |
JP3205643B2 (ja) | 2001-09-04 |
EP0625346B2 (en) | 2000-07-26 |
EP0625346A1 (en) | 1994-11-23 |
SG52371A1 (en) | 1998-09-28 |
ES2109655T5 (es) | 2000-11-01 |
JPH06327713A (ja) | 1994-11-29 |
GB2279229A (en) | 1995-01-04 |
CA2123755A1 (en) | 1994-11-20 |
AU679219B2 (en) | 1997-06-26 |
ES2109655T3 (es) | 1998-01-16 |
DE69404747T3 (de) | 2001-03-08 |
CA2123755C (en) | 1998-11-10 |
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