CN105581873A - 生产用于吸收性卫生用品的后片的方法和吸收性卫生用品 - Google Patents

生产用于吸收性卫生用品的后片的方法和吸收性卫生用品 Download PDF

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CN105581873A
CN105581873A CN201510747025.2A CN201510747025A CN105581873A CN 105581873 A CN105581873 A CN 105581873A CN 201510747025 A CN201510747025 A CN 201510747025A CN 105581873 A CN105581873 A CN 105581873A
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圭多·博内利
迭戈·瓜尔蒂耶里
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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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • A61F13/56—Supporting or fastening means
    • A61F13/62—Mechanical fastening means, ; Fabric strip fastener elements, e.g. hook and loop
    • A61F13/622—Fabric strip fastener elements, e.g. hook and loop
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    • A—HUMAN NECESSITIES
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    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • A61F13/15577—Apparatus or processes for manufacturing
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    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
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    • A61F13/00—Bandages or dressings; Absorbent pads
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    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • A61F13/56—Supporting or fastening means
    • A61F13/62—Mechanical fastening means, ; Fabric strip fastener elements, e.g. hook and loop
    • A61F13/622—Fabric strip fastener elements, e.g. hook and loop
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y10T156/1075—Prior to assembly of plural laminae from single stock and assembling to each other or to additional lamina
    • Y10T156/1077—Applying plural cut laminae to single face of additional lamina

Abstract

本发明提供一种生产设有钩环连接件(24)的用于吸收性卫生用品(10)的后片(14)的方法，包括以下步骤：使不具有支撑件的纤维材料的连续卷材(30)以第一速度V1前进；在横向方向上剪切纤维材料的连续卷材(30)从而形成纤维材料段(38)；使纤维材料段(38)以比所述第一速度(V1)更大的第二速度(V2)加速；将所述纤维材料段(38)转化成用于钩环固定件的环材料的前带(26)；形成设有以恒定的间距间隔开的环材料的前带(26)的连续后片卷材(14)。

Description

生产用于吸收性卫生用品的后片的方法和吸收性卫生用品
技术领域
本发明涉及吸收性卫生用品(例如尿布)的生产，并且涉及生产用于吸收性卫生用品的后片的方法。本发明还涉及包括所述后片的吸收性卫生用品。
背景技术
尿布通常由当穿上尿布时将会接触使用者皮肤的可渗透的顶片、不可渗透的后片以及封装在顶片和后片之间的吸水芯组成。尿布通常具有后腰部区域和前腰部区域，后腰部区域和前腰部区域通过钩环固定件(如著名的固定器件)围绕使用者的腰部而闭合。这些固定器件通常包括从后腰部区域侧向地凸出的一对闭合翼，该闭合翼可释放地锚固在前带上，该前带在前腰部区域处被施加在后片的外侧上。前带包括形成钩环闭合器件的母端部分的环材料层。
钩环固定件的环材料由例如聚丙烯的材料来形成，所述材料的上表面上设置有适合与闭合翼的微型钩相接合的微型环。环材料通常固定在支撑件上，所述支撑件代表性地由塑料材料或由无纺聚丙烯等的膜形成。
EP-A-2540272描述了用于尿布的前片的多层材料，其包括由聚烯烃膜形成的支撑件和由无纺聚烯烃材料形成的环材料层。通过胶合将支撑件和环材料层固定在一起。
在传统的解决方案中，对由环材料形成的前带和相应的支撑件进行剪切并将其施加在与前腰部区域同一水平的后片的外侧上。通过胶合或通过超声波焊接将前带施加在后片上。由于焊接会损害后片的不可渗透性，因此其通常不合适。
尿布的后片是多层复合结构，所述多层复合结构包括内部的不可渗透膜以及通过胶合层施加在该不可渗透膜上的外无纺材料的层。在这些情况下，通常通过胶合层将前带施加在后片的无纺层的外侧。该已知的解决方案的缺点在于，后片在前带处相当厚且僵硬，这是由于在该区域设置了以下层：位于后片内的不可渗透层、第一胶合层、后片的外无纺层、第二胶合层、前带的支撑件、第三胶合层以及前带的环材料。
原则上，能够选择具有预先形成的环的材料，类似于闭合件的“环”材料。用于一次性用品的预先形成的环材料可以是US5611791中描述的3M类型的，其描述了起皱成具有环结构的相对薄的无纺材料。典型地，可以使用粘合剂层将该材料施加在后片上。但是，该解决方案对于一次性用品来说非常昂贵。
AplixInc.的EP2636782A1描述了形成钩环闭合件的环材料的无纺复合材料。将纤维材料层压到基材上。在将前体纤维材料焊接在基板上后，该纤维材料成为环材料。在具有图案的区域进行焊接，该图案具有双重目的：在前体的表面上制造三维性以使其适于与钩接合，以及将该三维性稳定化以便在放置有钩时该钩不会撕扯纤维。
发明内容
本发明的目的在于提供生产用于吸收性卫生用品的后片的方法以及包括该后片的吸收性卫生用品，其克服了现有技术的问题。
根据本发明，通过如下所述的方法和吸收性卫生用品来实现该目的。
本发明提出了一种生产用于吸收性卫生用品的后片的方法，所述吸收性卫生用品设有钩环固定件，所述方法包括以下步骤：使不具有支撑件的纤维材料的连续卷材以第一速度V1前进，在横向方向上剪切纤维材料的连续卷材，从而形成纤维材料的段，使所述纤维材料的段加速到比所述第一速度V1更大的第二速度V2，将以恒定的间距间隔开的所述纤维材料的段焊接在以所述第二速度V2前进的连续的无纺支撑卷材上，以将所述纤维材料的段转化成用于钩环固定件的环材料的前带，以及将连续的不可渗透膜固定在具有所述环材料的前带的所述连续的无纺支撑卷材上，从而形成设有以恒定的间距间隔开的环材料的前带的连续的后片卷材。
优选地，所述不具有支撑件的纤维材料的连续卷材包括具有纵向地定向的纤维的材料。
优选地，通过设置在横向方向上的焊接线来将所述纤维材料的段焊接在所述连续的无纺支撑卷材上。
优选地，通过胶合来将连续的不可渗透膜固定在具有所述环材料的前带的所述连续的无纺支撑卷材上。
本发明还提出了一种吸收性卫生用品，所述吸收性卫生用品包括后片，所述后片包括固定在不可渗透膜上的无纺支撑层和直接固定在无纺支撑层上的不具有支撑件的环材料的前带。
附图说明
将参照附图、仅通过非限制性的例子对本发明进行详细描述，其中：
图1是根据本发明的吸收性卫生用品的立体图，并且
图2是根据本发明的用于制造吸收性卫生用品的后片的方法的示意性侧视图。
具体实施方式
参照图1，标号10表示以被穿着时的结构来图示的尿布。尿布10包括在使用中接触使用者的皮肤的由可渗透性材料制成的顶片12，不可渗透的后片14以及封装在顶片12和后片14之间的吸收芯16。尿布10具有在使用中围绕使用者的腰部闭合的前腰部区域18和后腰部区域20。腹股沟区域22在前腰部区域18和后腰部区域20之间延伸，在使用中该腹股沟区域22设置在使用者的两腿之间。
尿布10包括将前腰部区域18和后腰部区域20彼此固定的钩环固定器件24。钩环固定器件24包括在前腰部区域18处施加在后片14的外表面上的环材料的前带26，以及从后腰部区域20侧向地凸出的一对闭合翼28。闭合翼28具有设有微型钩的表面，该微型钩形成钩环固定件24的公端部分。前带26具有设有微型环的外表面，该微型环形成钩环固定件24的母端部分。
图2示意性地图示了生产具有相应的前带26的后片14的方法。
标号30表示纤维材料的连续卷材，其形成钩环闭合件的环材料的前体。纤维材料的连续卷材30由例如聚酯或聚丙烯的单一无纺层形成。纤维材料的连续卷材可以由具有纵向地定向的纤维的单一无纺层(例如粗梳无纺材料)构成。使纤维材料的连续卷材30在直线方向上以速度V1朝向剪切单元32前进。剪切单元32包括剪切滑移辊34以及与该剪切滑移辊34配合的刀辊36。剪切单元32在横断的方向上对纤维材料的连续卷材30进行剪切，以便从纤维材料的连续卷材30上分离出纤维材料的连续段38，每个连续段38形成环材料的前带26的前体。纤维材料的段38通过吸气而被保持在剪切滑移辊34的表面上，并且从辊34开始使纤维材料的段38加速至比环材料的连续卷材30的速度V1更大的速度V2。
以速度V2将连续的无纺支撑卷材40输送向焊接单元42。该焊接单元42包括砧辊44、焊接辊46以及偏辊48。砧辊44通过吸气从剪切滑移辊34上获取纤维材料的段38。砧辊44以等于速度V2的周缘速度旋转。连续的无纺支撑卷材40输送到位于焊接辊46的下游的砧辊44的表面上。焊接辊46以恒定的间距将纤维材料的段38焊接在连续的无纺卷材40上。
纤维材料的段38的纤维通过热焊接或超声焊接固定在连续的无纺支撑件40上，该连续的无纺支撑件40具有焊接区域图案，例如已引用的EP2636782A1所图示的，该焊接区域图案提供合适尺寸的连续线、直线段或曲线、点或闭合轮廓线(例如圆)。这些焊接区域形成设置在两个相邻的焊接区域之间的纤维的弧。这些弧形成环，该环适合于接收钩环闭合件的互补性元件的钩。在本发明的优选实施例中，纤维材料的连续卷材30的纤维优选纵向地定向，焊接区域由横向地设置的直的或弯的连续线或段形成。因此，优选地为横向的焊接将优选地具有纵向定向的纤维的纤维材料的段38转换为环材料的前带26。
在砧辊44的出口处，连续的无纺支撑卷材40具有连续串的环材料的前带26，连续串的环材料的前带26以固定的间隔固定在该无纺支撑卷材40的一个上表面上。具有环材料的前带38的连续无纺支撑卷材40以速度V2前进。
具有环材料的前带38的连续的无纺支撑卷材40与以速度V2前进的连续的不可渗透膜50相连接。该连续的不可渗透膜50施加在连续的无纺支撑卷材40的与其上施加有环材料的前带26的表面相对的表面上。通过施胶单元54施加的胶和层将连续的不可渗透膜50和连续的无纺支撑卷材40固定在一起。在施胶单元54的下游，使得具有环材料的前带26的连续的无纺卷材40和连续的不可渗透膜50穿过一对压力辊56。
在压力辊56的下游，形成了连续的后片卷材14，其设有以规则的间距间隔开的环材料的前带26，以速度V2前进。在随后的工艺步骤中，根据现有技术将连续的后片卷材14连续地与其他部件相连，以形成尿布的挡片的连续链。
每个后片14均由固定在无纺材料的支撑层40上的不可渗透膜50形成，在无纺材料的支撑层40上设有不具有支撑件的环材料的前带26。不具有支撑件的环材料的前带26直接固定在无纺支撑层40上，而不是直接固定在不可渗透膜50上。
在将连续的无纺支撑卷材40施加在连续的不可渗透膜50上之前将纤维材料的段38施加在连续的无纺支撑卷材40上是有利的，这是因为这不会损害连续的不可渗透膜50的完整性。
本发明包括，将环材料的纤维材料前体直接施加在将要形成后片的支撑件的无纺材料上，该无纺材料因此用作环材料的前带的基体。通过“激活”前体材料的热机械焊接或超声焊接来进行纤维材料的施加。随后，典型地通过粘合剂将具有“激活后的”前体材料的无纺材料层压在不可渗透膜上，以形成已经包括环材料的复合的后片。通过焊接在基材上来进行的前体材料的激活是直接在后片的支撑卷材上进行的。以这种方式，能够省去前带的基体。归功于该解决方案，不需要获得昂贵的环材料，简单且经济的无纺材料已足够，该无纺材料优选地具有纵向地设置的纤维，该纤维将通过嵌入式焊接到后片的支撑卷材上而成为环材料，特别优选地，其具有横向焊点，所述横向焊点与具有纵向地设置的纤维的无纺材料相连接。
可以理解的是，本发明能够免去支撑层，根据现有技术的解决方案，该支撑层设置在环材料的层和后片的外表面之间。因此，本发明允许获得厚度减小并且在前带处具有更好的柔性的尿布。本发明还允许较大程度地减小环材料的前带的成本。
当然，只要不违背本发明的原则、结构和实施例的细节可相对于所描述和图示有很大的改变，而不脱离以下的权利要求所限定的本发明的范围。

Claims (5)

1.生产用于吸收性卫生用品(10)的后片(14)的方法，所述吸收性卫生用品(10)设有钩环固定件(24)，所述方法包括以下步骤：
使不具有支撑件的纤维材料的连续卷材(30)以第一速度(V1)前进，
在横向方向上剪切纤维材料的连续卷材(30)，从而形成纤维材料的段(38)，
使所述纤维材料的段(38)加速到比所述第一速度(V1)更大的第二速度(V2)，
将以恒定的间距间隔开的所述纤维材料的段(38)焊接在以所述第二速度(V2)前进的连续的无纺支撑卷材(40)上，以将所述纤维材料的段(38)转化成用于钩环固定件的环材料的前带(26)，以及
将连续的不可渗透膜(50)固定在具有所述环材料的前带(26)的所述连续的无纺支撑卷材(40)上，从而形成设有以恒定的间距间隔开的环材料的前带(26)的连续的后片卷材(14)。
2.根据权利要求1所述的方法，其特征在于，所述不具有支撑件的纤维材料的连续卷材(30)包括具有纵向地定向的纤维的材料。
3.根据权利要求1或2所述的方法，其特征在于，通过设置在横向方向上的焊接线来将所述纤维材料的段(38)焊接在所述连续的无纺支撑卷材(40)上。
4.根据权利要求1到3中任一项所述的方法，其特征在于，通过胶合来将连续的不可渗透膜(50)固定在具有所述环材料的前带(26)的所述连续的无纺支撑卷材(40)上。
5.一种吸收性卫生用品，所述吸收性卫生用品包括后片(14)，所述后片(14)包括固定在不可渗透膜(50)上的无纺支撑层(40)和直接固定在无纺支撑层(40)上的不具有支撑件的环材料的前带(26)。
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