CN106794093A - 包括至少一个弹性粘结区域的一次性制品 - Google Patents
包括至少一个弹性粘结区域的一次性制品 Download PDFInfo
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- CN106794093A CN106794093A CN201580047864.1A CN201580047864A CN106794093A CN 106794093 A CN106794093 A CN 106794093A CN 201580047864 A CN201580047864 A CN 201580047864A CN 106794093 A CN106794093 A CN 106794093A
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Classifications
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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
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15699—Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
-
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Abstract
本发明要求保护一种包括至少两个粘结区域的一次性制品，其中一个区域具有弹性性能；另一个区域不同于第一区域。
Description
本专利申请要求2014年9月9日提交的临时提交专利申请号62/048047和62/048066以及2015年6月4日提交的临时专利申请号62/171129的优先权和权益。
背景技术
粘合剂通常用于将基底粘结在一起。在工业粘合剂领域中，通常使用热熔粘合剂来将多种制品粘结在一起，这些制品包括具有非织造基底的一次性吸收制品，例如尿布、训练裤、手术服、泳装、吸收内裤、成人失禁用品、卫生巾和医用敷料(例如，伤口护理产品)。
在一次性吸收制品的制造中可以使用多种热熔粘合剂。例如，在一次性尿布的制造中，热熔粘合剂用于构造(例如，将底片粘结到非织造材料和任选的吸收垫上)、弹性附接(例如，将弹性材料粘结到例如腿部或腰部的底片上)以及芯稳定(例如，将热熔粘合剂施加到吸收芯以增加芯的强度)。
热熔粘合剂也可用于形成可用在一次性制品中的弹性复合物。目前，弹性复合物常被形成在包括以下层的5层构型中：非织造材料、热熔粘合剂、弹性材料、热熔粘合剂、非织造材料。热熔粘合剂将非粘性弹性体粘结到非织造材料上以形成复合物。
或者，具有弹性性质的热熔粘合剂可替代弹性材料以形成简化的复合材料，该复合材料可为一次性制品的各部分赋予拉伸性。
发明内容
在一个方面，本发明包括一次性制品，其包括至少两个相邻的粘结区域，第一粘结区域包括：第一基底和第二基底；以及在第一基底和第二基底之间的弹性热熔粘合剂组合物，从而使第一基底和第二基底彼此粘结；该弹性热熔粘合剂组合物在350℉下的粘度小于约15,000cps，在50％滞后之后的变形不大于约20％；第二粘结区域包括：第一基底和第二基底；以及在该第一基底和第二基底之间的热熔粘合剂组合物，从而使第一基底和第二基底彼此粘结，该第二粘结区域具有与该第一粘结区域不同的性质。
在一个实施例中，至少两个相邻的粘结区域包括以不同涂层重量施加的相同的弹性热熔粘合剂。在另一个实施例中，第二粘结区域包括不同于弹性热熔粘合剂组合物的第二热熔粘合剂组合物。在又一个实施例中，使用两种不同的施加方法将两种不同的热熔粘合剂施加到基底上。
在不同的实施例中，该一次性制品是一次性吸收制品。
在一个实施例中，至少一个基底是非织造的。在另一个实施例中，该非织造材料通过气流成网、梳理成网和水刺成网。在不同的实施例中，该非织造材料在幅材横向方向上可延展至大于100％。
在一个实施例中，该至少两个相邻的粘结区域用于选自紧固耳状物、腰带、腹带和侧板的应用中。在不同的实施例中，三个相邻的粘结区域构成紧固耳状物；该三个相邻的粘结区域包括在两个第二粘结区域之间的弹性粘结区域。
在一个实施例中，该一次性制品选自尿布、吸收内裤、妇女卫生用品和医用绷带。
在另一个实施例中，该一次性制品是吸收内裤，包括遍布整个吸收内裤的相邻粘结区域，该相邻粘结区域包括与第二粘结区域交替的弹性区域。
在一个实施例中，弹性热熔粘合剂组合物包含约30重量％至约60重量％的一种或多种苯乙烯嵌段共聚物，其中该一种或多种苯乙烯嵌段共聚物具有至少约30重量％的平均苯乙烯含量、不小于约20的平均MFR(200℃/5kg)、大于约10％的增塑剂和增粘剂。
在另一个实施例中，弹性热熔粘合剂组合物包括增粘剂，该增粘剂是具有约5重量％至约20重量％的芳香族含量的烃树脂，以及；环烷油增塑剂。在不同的实施例中，该一种或多种苯乙烯嵌段共聚物的平均苯乙烯含量为至少约40重量％。在一个实施例中，该一种或多种苯乙烯嵌段共聚物具有不小于约30的平均MFR(200℃/5kg)。
在一个实施例中，使用选自槽式涂布和非接触涂布的施加方法将至少一种热熔粘合剂施加到基底。在另一个实施例中，使用选自丝网印刷、喷涂、梳状垫片槽和凹版辊的施加方法将至少一种热熔粘合剂施加到基底。
在另一方面，本发明要求保护一种包括至少两个弹性区域的一次性制品，所述弹性区域包括：至少一个基底；以及粘结到该基底上的弹性热熔粘合剂组合物，其中该热熔粘合剂组合物为粘结区域提供弹性；该弹性热熔粘合剂组合物在350℉下的粘度小于约15,000cps，在50％滞后之后的变形不超过约20％。
在一个不同方面，本发明包括一次性制品，其包括至少一个层状粘结区域，该层状粘结区域包括：第一基底；在第一基底上以连续涂层涂布的弹性热熔粘合剂组合物；第二热熔粘合剂组合物，该第二热熔粘合剂组合物以不连续的方式涂布在所述弹性热熔粘合剂上；以及第二基底；其中该第二基底通过第二热熔粘合剂组合物粘结到弹性热熔粘合剂组合物；该弹性热熔粘合剂组合物在350℉下的粘度小于约15,000cps，在50％滞后之后的变形不超过约20％。
附图说明
图1是包括三个相邻的粘结区域的尿布紧固翼片的俯视图。
图2是使用三个不同的涂布头如何将三个相邻的粘结区域施加到基底上的图示。
图3是具有相邻粘结区域的吸收内裤的前视图，该粘结区域以竖条纹模式存在于整个内裤中。
具体实施方式
本申请人发现了可用于形成弹性区域的热熔粘合剂组合物，该弹性区域可用在一次性制品(例如，一次性吸收制品)中。该组合物具有良好的弹性恢复性和在177℃(350℉)下小于约15,000cps的粘度。低粘度使得以高线速度施加热熔粘合剂，并且只对需要弹性性能的区域套准，即提供分区施加成为可能。低粘度还使得在一次性制品生产线中施加热熔粘合剂成为可能。热熔粘合剂组合物的低粘度为用户提供柔性，从而产生弹性粘结区域的能力。
一次性制品
相邻粘结区域
一次性制品可包括至少两个粘结区域，该至少两个区域可彼此相邻。相邻意味着两个粘结区域并排设置。两个相邻的粘结区域可彼此略微重叠。至少一个相邻的粘结区域使用弹性热熔粘合剂粘结。第二区域可使用弹性热熔粘合剂粘结，或者作为另外一种选择使用第二热熔粘合剂粘结。
第二热熔粘合剂可用于向该制品中引入附加性能，例如，刚度(即通过使用与弹性热熔粘合剂相比具有更高模量的粘合剂)、透气性、更低的成本、改善的粘合力和/或改善的耐蠕变性。
第二热熔粘合剂可用于通过改变该弹性粘结区域相对于第二粘结区域的宽度来控制弹性热熔粘合剂可伸长的程度。
所述至少两个相邻的粘结区域彼此不相同。在一个实施例中，使用以两种不同涂层重量施加的相同的弹性热熔粘合剂来构造两个相邻的粘结区域。
该弹性区域可包括第一基底和热熔粘合剂组合物。热熔粘合剂组合物赋予第一基底弹性。
作为另外一种选择，该弹性区域可包括第一基底、第二基底和弹性热熔粘合剂组合物。该弹性热熔粘合剂组合物存在于第一基底和第二基底之间，将这两种基底永久地彼此粘结并在粘结区域提供弹性。
层状粘结区域
在不同的实施例中，本发明包括层状粘结区域。在该实施例中，该弹性热熔粘合剂可按连续膜涂布在第一基底上，然后以不连续的方式将第二热熔粘合剂直接施加在弹性热熔粘合剂的顶部。然后可使用第二热熔体将第二基底粘结到弹性热熔粘合剂上，以形成具有四层的复合材料：第一基底、弹性热熔粘合剂膜、第二热熔粘合剂的不连续涂层和第二基底。
相邻/层状粘结区域
基底之一可以是非织造材料。可使用任何非织造材料。非织造材料可包含由以下材料制成的纤维：一种或多种聚合物(例如，PET(聚对苯二甲酸乙二醇酯)、PBT(聚对苯二甲酸丁二醇酯)、尼龙、聚丙烯和聚乙烯)、一种或多种天然纤维(例如，人造丝纤维素、棉纤维素、大麻和粘胶纤维)或它们的组合。非织造材料可通过多种不同的方法(包括例如气流成网、湿法成网、纺粘或熔喷)形成。可使纤维梳理成网(例如，用梳子)，使得纤维以特定方向取向。这些纤网可以任何方式(包括例如水刺、化学粘合、针刺或热粘合)粘结在一起。在一个实施例中，非织造材料由气流成网、梳理成网和水刺成网的聚丙烯和聚乙烯纤维的共混物组成。在另一个实施例中，非织造材料可以是自身具有弹性的。这通过将弹性纤维结合到非织造材料中或通过并入吸收的弹性材料以改善弹性来实现。本文所述的热熔粘合剂可与弹性非织造材料结合使用，以增加复合材料的弹性性能。
作为另外一种选择，其中一个基底可以是非织造材料，另一个基底可以是聚合物膜。可使用任何聚合物膜。聚合物膜可选自聚乙烯、聚丙烯、聚乙烯共聚物、聚丙烯共聚物和PET。
第一基底和第二基底可以是非织造材料。非织造材料可具有小于40gsm(克/平方米)、小于35gsm或甚至小于约30gsm的基重。非织造材料在幅材横向方向上可延展至大于100％。基底中的至少一者选自非织造材料和聚合物膜。
各种后处理诸如用带槽轧辊处理(即活化)可用于调整复合物的机械特性(如延展性)。
可使用多种施加方法(包括槽式涂布、非接触涂布、梳状垫片涂布、喷涂(包括例如螺旋喷涂和随机喷涂)、丝网印刷、发泡(例如，使用化学发泡剂或Nordson分配系统)、螺旋辊、凹辊、挤出和熔喷)将弹性热熔粘合剂施加到第一基底和/或第二基底。
可将弹性热熔粘合剂施加到一个基底上。
或者，可将弹性热熔粘合剂施加到第一基底，然后由第二基底接触，以形成粘结区域。压力、张力和/或线速度可有助于形成粘结区域。该粘结区域可在一次性制品的制造过程中形成。作为另外一种选择，粘结区域在一次性制品的制造过程之前形成。
弹性热熔胶组合物
该弹性热熔粘合剂可为压敏(即，在室温下显示粘性)热熔粘合剂。弹性热熔粘合剂组合物可以是浅色的并且可以具有良好的热稳定性。在冷却膜中，热熔粘合剂可为透光的(即半透明的)，或作为另外一种选择，热熔粘合剂可为不透明的。该弹性热熔粘合剂在制造后可具有小于约3，或甚至小于约2的初始熔融加德纳颜色。作为另外一种选择，可将弹性热熔粘合剂着色为不透明的颜色，诸如粉色、蓝色、白色、灰色等。
弹性热熔粘合剂组合物在施加温度下具有低粘度。该粘度为约177℃(350℉)下不大于约15,000cps、约177℃(350℉)下不大于约10,000cps、约177℃(350℉)下不大于约7,500cps，或甚至177℃(350℉)下不大于约5,000cps。当根据2-峰滞后测试方法测试时，弹性热熔粘合剂组合物呈现出在50％滞后之后的变形不大于约20％、不大于约12％、不大于约10％或甚至不大于约8％。
当根据剥离力测试方法测试时，弹性热熔粘合剂组合物提供良好的粘合性。在一些实施例中，弹性热熔粘合剂可具有大于约100克、大于约200克或甚至大于约300克的剥离粘合力。
弹性热熔粘合剂组合物可包括一种或多种苯乙烯嵌段共聚物，增粘剂和大于约15重量％的增塑剂。
弹性热熔粘合剂组合物可具有粘度比(即149℃(300℉)下的粘度(cps)/177℃(350℉)下的粘度)小于约7、小于约6、小于约5或甚至小于约4的粘度曲线。低粘度比可表明在较高的线速度下具有改善的加工性，因为随着热熔粘合剂冷却，其粘度增长得越来越慢。
弹性热熔性粘合剂组合物可包括具有至少一些芳族化合物含量的增粘剂和增塑剂如环烷油。
苯乙烯嵌段共聚物
弹性热熔粘合剂包括一种或多种苯乙烯嵌段共聚物。
苯乙烯嵌段共聚物包括芳香族乙烯基聚合物嵌段和共轭双烯聚合物嵌段、氢化共轭双烯聚合物嵌段或它们的组合。这些嵌段可以多种构型(包括例如直链、支链、径向、星型嵌段以及它们的组合)排列。芳香族乙烯基聚合物嵌段可衍生自多种芳香族乙烯基化合物，包括例如苯乙烯、α-甲基苯乙烯、β-甲基苯乙烯、邻-、间-、对-甲基苯乙烯、叔丁基苯乙烯、2,4,6-三甲基苯乙烯、单氟苯乙烯、二氟苯乙烯、单氯苯乙烯、二氯苯乙烯、甲氧基苯乙烯、1,3-乙烯基萘、乙烯蒽、茚、苊烯以及它们的组合。双烯聚合物嵌段可衍生自多种含双烯化合物，包括例如异戊二烯、丁二烯、己二烯、2,3-二甲基-1,3-丁二烯、1,3-戊二烯和它们的氢化型式，以及它们的组合。
有用的苯乙烯嵌段共聚物包括例如二嵌段，三嵌段和多嵌段共聚物，包括例如苯乙烯-丁二烯，苯乙烯-丁二烯-苯乙烯，苯乙烯-异戊二烯，苯乙烯-异戊二烯-苯乙烯，苯乙烯-乙烯/丁烯，苯乙烯，苯乙烯-乙烯/丙烯，苯乙烯-乙烯/丙烯-苯乙烯，苯乙烯-乙烯-乙烯/丙烯-苯乙烯及其组合。
一种或多种苯乙烯嵌段共聚物具有至少约30重量％、至少约35重量％、至少约40重量％或甚至约35重量％至约45重量％的平均苯乙烯含量。
例如，如果热熔组合物包含两种苯乙烯嵌段共聚物A和B。聚合物A以25重量％存在，苯乙烯含量为35％，聚合物B以25重量％存在，苯乙烯含量为45重量％。则一种或多种苯乙烯嵌段共聚物的平均苯乙烯含量按照下列方式计算：0.5(35)+0.5(45)＝40重量％。
根据ASTM D 1238(200℃/5kg)并以dg/分钟计，一种或多种苯乙烯嵌段共聚物具有不小于约20、不小于约25或甚至不小于约30的平均熔融流动速率(MFR)。苯乙烯嵌段共聚物的平均MFR按照与计算平均苯乙烯含量类似的方式计算。
弹性热熔粘合剂可包括至少一种苯乙烯嵌段共聚物，其中苯乙烯含量为至少约40重量％。
该组合物具有大于40重量％、大于45重量％、约30重量％至约60重量％、约35重量％至约55重量％，或甚至约40重量％至约50重量％的总苯乙烯嵌段共聚物含量。
苯乙烯嵌段共聚物可为不含两嵌段的纯三嵌段共聚物。作为另外一种选择，苯乙烯嵌段共聚物可包含一部分两嵌段。苯乙烯嵌段共聚物可包含大于30％的两嵌段含量。
可用的苯乙烯嵌段共聚物包括：购自德克萨斯州休斯顿的台橡公司(TSRC Dexco,Houston,Texas)的VECTOR 6241(直链，苯乙烯-丁二烯-苯乙烯，纯三嵌段共聚物，43重量％苯乙烯，MFR(200℃/5kg)＝23dg/分钟)、VECTOR 8508(直链，苯乙烯-丁二烯-苯乙烯，纯三嵌段共聚物，29重量％苯乙烯，MFR(200℃/5kg)＝12dg/分钟和VECTOR 4411(直链，苯乙烯-异戊二烯-苯乙烯，纯三嵌段共聚物，44重量％苯乙烯，MFR(200℃/5kg)＝40dg/分钟)，以及购自台湾台北的李长荣化学工业股份有限公司(LCY CHEMICAL CORP.,Taipei,Taiwan)的GLOBALPRENE 3545(直链，苯乙烯-丁二烯-苯乙烯嵌段共聚物，63％两嵌段，45重量％苯乙烯，MFR(190℃/5kg)＝55)。另一种有用的苯乙烯嵌段共聚物包括购自德克萨斯州休斯顿(Houston,Texas)的美国科腾聚合物有限责任公司(KRATON POLYMERS U.S.LLC)的KRATONFG 1901G(直链，苯乙烯-乙烯/丁烯-苯乙烯，30重量％苯乙烯，1.7％结合的马来酸酐)。
增粘剂
弹性热熔粘合剂可包括增粘剂。增粘剂在室温下可为流体或固体。合适的增粘剂类别包括例如芳香族、脂肪族和环脂族烃类树脂、混合的芳香族和脂肪族改性烃类树脂、芳香族改性脂肪族烃类树脂以及它们的氢化型式；萜烯、改性萜烯，以及它们的氢化型式；天然松香、改性松香、松香酯，以及它们的氢化型式；低分子量聚乳酸；以及它们的组合。可用的天然和改性松香的例子包括脂松香、木松香、妥尔油松香、蒸馏松香、氢化松香、二聚松香和聚合松香。可用的松香酯的例子包括例如浅色木松香的甘油酯、氢化松香的甘油酯、聚合松香的甘油酯、天然和改性松香的季戊四醇酯，包括浅色木松香的季戊四醇酯、氢化松香的季戊四醇酯、妥尔油松香的季戊四醇酯和松香的酚改性季戊四醇酯。
可用的增粘剂可以多种商品名商购获得，包括例如来自德克萨斯州休斯顿的埃克森美孚化工公司(Exxon Mobil Chemical Company,Houston,Texas)的商品名ESCOREZ系列，包括ESCOREZ 5400(芳香族含量为1％)、ESCOREZ 5600(芳香族含量为9.8％)、ESCOREZ5690(芳香族含量为10％)和ESCOREZ 5615(芳香族含量为9.9％)；来自田纳西州金斯波特的伊士曼化工公司(Eastman Chemical,Kingsport,Tennessee)的商品名EASTOTAC系列，包括EASTOTAC H-100R和EASTOTAC H-100L；来自宾夕法尼亚州艾斯顿的克雷威利碳烃特殊化学品公司(Cray Valley HSC,Exton,Pennsylvania)的商品名WINGTACK系列，包括WINGTACK86、WINGTACK EXTRA和WINGTACK 95；以及来自田纳西州金斯波特的伊士曼化工公司(Eastman Chemical Company,Kingsport,Tennessee)的商品名PICCOTAC和KRISTALEX系列，包括例如PICCOTAC 8095和KRISTALEX 3100。
弹性热熔粘合剂可不含具有大于约130℃的熔点的端嵌段树脂。
弹性热熔粘合剂组合物可包括至少一种具有芳香族含量的增粘剂。增粘剂可以具有大于5重量％，大于20重量％，大于50重量％，约5重量％至约20重量％，或甚至约8重量％至约15重量％的芳族含量。
该组合物可包含熔点小于100℃或甚至小于95℃的增粘剂。
弹性热熔粘合剂组合物可包括至少约20重量％、至少约25重量％、约10重量％至约50重量％、约15重量％至约40重量％或甚至约20重量％至约37重量％的增粘剂。
增塑剂
弹性热熔粘合剂组合物可包括增塑剂。合适的增塑剂包括例如环烷油、石蜡油(例如，环烷烃油)、矿物油、邻苯二甲酸酯、己二酸酯、烯烃低聚物(例如，聚丙烯、聚丁烯和氢化聚异戊二烯的低聚物)、聚丁烯、聚异戊二烯、氢化聚异戊二烯、聚丁二烯、苯甲酸酯、动物油、植物油(例如，蓖麻油、大豆油如高油酸豆油)、油的衍生物、脂肪酸的甘油酯、聚酯、聚醚、乳酸衍生物以及它们的组合。
有用的市售增塑剂包括来自Calumet Specialty Products Partners，LP(Indianapolis，Indiana)的CALSOL 550环烷油，来自Sonneborn(Tarrytown New York)的KAYDOL OIL矿物油来自Exxon Mobil Chemical Company(Houston，Texas)的PARAPOL聚丁烯，来自BASF的OPPANOL聚异丁烯(Ludwigsjhafen，Germany)，来自Petrochem CarlessLimited(Surrey，England)的KRYSTOL 550矿物油，PURETOL 35和15两种来自Petro CanadaLubricants Inc.(Mississauga，Ontario)的矿物油和来自Pioneer DuPont的PLENISH。
增塑剂可为环烷油。作为另外一种选择，增塑剂包含芳香基团或环烷基团。
增塑剂能够以至少约10重量％、至少约15重量％、至少约18重量％、约10重量％至约30重量％，或甚至约15重量％至约25重量％的量存在于弹性热熔粘合剂组合物中。
蜡
弹性热熔胶组合物可包括蜡。可用的蜡类别包括例如石蜡、微晶蜡、高密度低分子量聚乙烯蜡、副产物聚乙烯蜡、聚丙烯蜡、费托蜡、氧化费托蜡、官能化蜡诸如酸、酸酐和羟基改性的蜡、动物蜡、植物蜡(例如，大豆蜡)以及它们的组合。可用的蜡在室温下为固体并且优选地具有50℃至170℃的环球软化点。可用的蜡可商购自多个供应商，包括来自德克萨斯州休斯敦的维斯特莱克化学公司(Westlake Chemical Corporation,Houston,Texas)的商品名EPOLENE N和C系列，包括例如EPOLENE N-21；以及来自瑞士穆顿兹的科莱恩国际公司(Clariant International Ltd.,Muttenz,Switzerland)的商品名LICOCENE系列，例如TP LICOCENE PP 6102。
弹性热熔粘合剂组合物可包含不大于约8重量％、不大于约5重量％、约1重量％至约7.5重量％，或甚至约1重量％至约5重量％的蜡。
附加组分
弹性热熔粘合剂组合物任选地包括附加组分，该附加组分包括但不限于例如：发泡剂、稳定剂、抗氧化剂、附加的聚合物(例如烯烃基聚合物(例如丙烯均聚物、丙烯共聚物、乙烯均聚物、乙烯共聚物、官能化聚合物诸如酸、酸酐和羟基改性聚合物)、无定形聚-α烯烃、聚乙烯共聚物)、粘合促进剂、紫外光稳定剂、腐蚀抑制剂、气味吸收剂/中和剂、着色剂(例如，颜料(例如二氧化钛、炭黑，以及它们的混合物)和染料)、香料、填料(例如，纳米颗粒、碳酸钙、粘土、滑石粉、热解法二氧化硅)、表面活性剂、湿度指示剂、超吸收剂、共挤出涂层、加工助剂以及它们的组合。
热熔粘合剂包含约0.1重量％至约2.0重量％的颜料，或甚至约0.1重量％至约0.5重量％的颜料。
可用的抗氧化剂包括例如季戊四醇四[3,(3,5-二叔丁基-4-羟基苯基)丙酸酯]、2,2'-亚甲基双(4-甲基-6-叔丁基苯酚)、亚磷酸盐(包括例如三-(对-壬基苯基)-亚磷酸盐(TNPP)和双(2,4-二-叔丁基苯基)4,4'-二亚苯基-二膦酸盐)、二-硬脂基-3,3'-硫代二丙酸酯(DSTDP)以及它们的组合。可用的抗氧化剂可以多种商品名商购获得，包括例如商品名IRGANOX系列，包括例如IRGANOX 1010、IRGANOX 565和IRGANOX 1076受阻酚抗氧化剂，和IRGAFOS 168亚磷酸盐抗氧化剂(其均可得自新泽西州弗洛勒姆帕克的巴斯夫公司(BASFCorporation(Florham Park,New Jersey))，以及ETHYL 702 4,4'-亚甲基双(2,6-二叔丁基苯酚)。当存在抗氧化剂时，弹性热熔粘合剂组合物优选包含约0.1重量％至约2重量％的抗氧化剂。
一次性制品
本发明的粘结区域可结合到任何合适的一次性制品中，这些制品包括个人护理衣物、医疗衣服和工业工人工作服。
本发明的粘结区域可用于多种应用和结构以改善舒适度和贴合性，所述多种应用和结构包括例如一次性吸收制品，包括例如尿布、训练裤、泳装、吸收内裤(例如，成人失禁用品)、卫生巾、医疗敷料(例如，伤口护理产品和绷带)、手术垫、医用长袍、帽子、手套、手术单、面罩、实验服、连衣工作服、肉类包装产品以及吸收制品的部件，包括例如吸收元件、吸收芯材、防渗层(例如，背片)、薄纸(例如，包装薄纸)、集液层以及织造和非织造幅材层(例如，顶片材、吸收薄纸)。
一次性吸收制品
本发明的粘结区域可用于使一次性吸收制品的许多区域具有弹性，这些区域包括腿箍、腰部、腹带、侧板和紧固翼片/耳状物。本发明的弹性复合材料可进一步用于使一次性制品的任何部分或甚至整个一次性制品具有弹性。
紧固翼片/耳状物
本发明的相邻粘结区域可用于使一次性吸收制品的紧固翼片/耳状物具有弹性。
在一个实施例(图1)中，紧固翼片21包括三个相邻的粘结区域。弹性粘结区域11，其在任一侧12上具有第二粘结区域。
每个粘结区域包括第一基底和第二基底以及在第一基底和第二基底之间的热熔粘合剂组合物，从而将第一基底和第二基底粘结在一起。弹性区域包括弹性热熔粘合剂。第二粘结区域可包括第二热熔粘合剂。
弹性区域允许紧固翼片区域伸展，同时第二粘结区域可增加紧固翼片区域的强度。
第二热熔粘合剂可比弹性热熔粘合剂更硬(即，具有更高的模量)。
可使用两个或更多个不同的涂布头利用槽式涂布或非接触涂布将热熔粘合剂施加到一个基底上，形成一系列并排的连续膜，该膜可用于将第一基底和第二基底粘结在一起，并且形成粘结区域。在一个实施例(图2)中，使用三个涂布头42将3个相邻的粘合区域44施加到基底49上，所述粘合区域彼此略微重叠。
吸收内裤
本发明的相邻粘结区域可用于制造具有棉的触感和伸展性的同时能够吸收体液的吸收内裤。在一个实施例(图3)中，吸收内裤5包括在整个吸收制品中以竖条纹模式存在的相邻粘结区域，与第二粘结区域9交替的弹性区域7。这些竖条纹可以更像是细条纹；作为另外一种选择，该竖条纹可以更宽。各个条纹可具有相同或不同的宽度。竖条纹可具有约1mm至约100mm、约1mm至约50mm或甚至约2mm至25mm的宽度。
第二粘结区域可包括将某些性质引入一次性吸收制品中的第二热熔粘合剂。该第二热熔粘合剂可提供透气性、内聚力、刚度和/或较低的蠕变。在一个实施例中，通过以不连续的方式涂布一种或两种热熔粘合剂来引入透气性。
实例
表中的组合物量均以重量％计。
测试程序
除非另外指明，否则用于实例和整篇说明书的测试程序包括以下程序。
粘度测试方法
根据标题为“Standard Test Method for Apparent viscosity of Adhesivesand Coating Materials(粘合剂和涂布材料表观粘度的标准测试方法)”(1988年10月31日)的ASTM D-3236，使用美国博勒飞公司的RVDV 2型Thermosel粘度计(BrookfieldThermosel viscometer Model RVDV 2)和27号转子来测定粘度。结果以厘泊(cps)记录。
熔融加德纳颜色
测试热熔粘合剂(在熔融态中)，通过相对于ASTM D-1544中所述的熔融加德纳颜色标准比较样品的颜色来确定熔融加德纳颜色。该比较使用可得自马里兰州贝塞斯达的太平洋科学公司(Pacific Scientific,Bethesda,Maryland)的装配了照明设备的GardnerDelta比较仪进行。
测试层合结构制备
在177℃(350℉)的施加温度、10.5牛顿/厘米(N/cms)(6磅/线性英寸(PLI))的辊隙压力和至少6.1米/分钟(m/min)(20英尺/分钟)的运行速度下，通过在两种非织造*基底之间连续槽式涂布弹性热熔粘合剂组合物来制备测试层合结构。所制备的层合结构中粘合剂涂层重量为100克/平方米(gsm)，粘合剂宽度为至少7.6cm(3英寸)。制备了足够量的层合物，使得至少能够收集1.5m(60英寸)的代表性层合结构用于测试。
*所用的非织造材料经梳理成网、水刺成网，并且包含50/50(PET/PP)。其单位重量为29g/m2，横向拉伸强度为93克/cm2(600克/英寸2)，CD断裂伸长率＝217％WSP方法110.4，伸长率(CD/MD)＝4.3。
剥离力测试方法
根据上述测试层合制备方法，通过在两种基底之间涂布弹性热熔粘合剂来制备测试层合物。剥离力使用ASTM D1876-01标题为“测试粘合剂的剥离强度的试验方法(T剥离试验方法)”，除了试验以30.5cm/分钟(12英寸/分钟)的速率进行，而不是25.4cm/分钟(10英寸/分钟)，历时10秒，并且运行7次重复，而不是ASTM D1876中规定的10次。在INSTRON型测试仪器上运行样品。测试样品的宽度为2.54cm(1英寸)，长度为至少10.16cm(4英寸)。记录10秒内剥离的平均剥离力，结果以克记录。在制备层合物至少24小时之后，测量初始剥离力。
2-峰滞后测试方法
根据上述测试层合制备方法，通过在两种基底之间涂布弹性热熔粘合剂来制备测试层合物。通过沿幅材横向方向将层合物切割成宽度为1英寸、长度为至少3英寸，制备测试样品。在制备非织造层合物至少24小时之后进行测试。
将制备的样品条延展至某一张力(例如，50％、100％、150％或200％)，然后回缩至其原有尺度。随后使样品经受具有相同变形的第二次延伸-回缩循环。将十字头速度设定为每分钟50.8cm(20英寸/分钟)。延伸和回缩之间没有停留时间。在INSTRON型测试仪器上运行样品，至少重复3次。根据在拉伸应力降至5克的情况下回缩曲线上的拉伸应变确定每次循环之后的永久变形。还记录最大变形时的峰值负载/应力和每个循环之间的能量损失百分比。
流变蠕变和回复
使用具有8mm板的平行板几何形状在Texas Instruments AR-G2流变仪上进行流变蠕变和回复。该测试在38℃下恒温运行，其中间隙为300μm。
一旦在38℃下平衡，施加26,800Pa的压力。将样品在此压力下保持20分钟(测试的蠕变部分)。然后将压力释放至0Pa，保持20分钟(测试的回复部分)。
测量张力。在表中记录特定间隔处的值。
表一
比较例1和2是本发明范围之外的组合物。两者在177℃(350℉)下的粘度大于15,000cps，并且预期两者都无法良好地应用于高速生产线。
| 比较例1 | 比较例2 | |
| VECTOR 8508(Avg.MFR(200℃/5kg)＝12) | 40 | 45 |
| ESCOREZ 5615 | 49.5 | 29.5 |
| CALSOL 550 | 10 | 25 |
| IRGANOX 1010 | 0.5 | 0.5 |
| 177℃(350℉)下的粘度(cps) | 43,400 | 30,870 |
表二-弹性热熔粘合剂实例
表三-弹性热熔粘合剂实例
表四
Claims (19)
1.一种一次性制品，包括至少两个相邻的粘结区域如下：
第一粘结区域，其包括：
第一基底和第二基底；以及在第一基底和第二基底之间的弹性热熔粘合剂组合物，从而使第一基底和第二基底彼此粘结；所述弹性热熔粘合剂组合物在350℉下的粘度小于约15,000cps，在50％滞后之后的变形不大于约20％；
第二粘结区域，其包括：
第一基底和第二基底；以及在所述第一基底和第二基底之间的热熔粘合剂组合物，从而使所述第一基底和所述第二基底彼此粘结，所述第二粘结区域具有与所述第一粘结区域不同的性质。
2.根据权利要求1所述的一次性制品，其中所述至少两个相邻的粘结区域包括以不同涂层重量施加的相同的弹性热熔粘合剂。
3.根据权利要求1所述的一次性制品，其中所述第二粘结区域包括与所述弹性热熔粘合剂组合物不同的第二热熔粘合剂组合物。
4.根据权利要求1所述的一次性制品，其中所述一次性制品是一次性吸收制品。
5.根据权利要求1所述的一次性制品，其中所述基底中的至少一个是非织造材料。
6.根据权利要求5所述的一次性制品，其中所述非织造材料通过气流成网、梳理成网和水刺成网。
7.根据权利要求5所述的弹性复合物，其中所述非织造材料在幅材横向方向上可延展至大于100％。
8.根据权利要求4所述的一次性制品，其中所述至少两个相邻的粘结区域用于选自紧固耳状物、腰带、腹带和侧板的应用中。
9.根据权利要求4所述的一次性制品，其中三个相邻的粘结区域构成所述紧固耳状物；所述三个相邻的粘结区域包括在两个第二粘结区域之间的弹性粘结区域。
10.根据权利要求4所述的一次性制品，选自尿布、吸收内裤、妇女卫生用品和医用绷带。
11.根据权利要求10所述的吸收内裤，包括在整个所述吸收内裤上的相邻的粘结区域，所述相邻的粘结区域包括与第二粘结区域交替的弹性粘结区域。
12.根据权利要求1所述的一次性制品，其中所述弹性热熔粘合剂组合物包含：
约30重量％至约60重量％的一种或多种苯乙烯嵌段共聚物，其中所述一种或多种苯乙烯嵌段共聚物具有至少约30重量％的平均苯乙烯含量、不小于约20的平均MFR(200℃/5kg)、
大于约10％的增塑剂和
增粘剂。
13.根据权利要求12所述的一次性制品，其中所述弹性热熔粘合剂组合物包含：
增粘剂，所述增粘剂是具有约5重量％至约20重量％的芳香族含量的烃树脂，以及；
环烷油增塑剂。
14.根据权利要求12所述的一次性制品，其中所述一种或多种苯乙烯嵌段共聚物的平均苯乙烯含量为至少约40重量％。
15.根据权利要求12所述的一次性制品，其中所述一种或多种苯乙烯嵌段共聚物具有不小于约30的平均MFR(200℃/5kg)。
16.根据权利要求1所述的一次性制品，其中使用选自槽式涂布和非接触涂布的施加方法将所述热熔粘合剂中的至少一种施加到所述基底。
17.根据权利要求1所述的一次性制品，其中使用选自丝网印刷、喷涂、梳状垫片槽和凹版辊的施加方法将所述热熔粘合剂中的至少一种施加到所述基底。
18.根据权利要求3所述的一次性制品，其中使用两种不同的施加方法将所述两种不同的热熔粘合剂施加到所述基底。
19.一次性制品，包括至少一个层状粘结区域，
所述层状粘结区域包括：
第一基底，
在所述第一基底上以连续涂层涂布的弹性热熔粘合剂组合物，
第二热熔粘合剂组合物，所述第二热熔粘合剂组合物以不连续的方式涂布在所述弹性热熔粘合剂上，
第二基底；
其中所述第二基底通过第二热熔粘合剂组合物粘结到弹性热熔粘合剂组合物；所述弹性热熔粘合剂组合物在350℉下的粘度小于约15,000cps，在50％滞后之后的变形不超过约20％。
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2015
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- 2015-09-09 WO PCT/US2015/049207 patent/WO2016040495A1/en active Application Filing
- 2015-09-09 JP JP2017513060A patent/JP6707529B2/ja active Active
- 2015-09-09 KR KR1020177005708A patent/KR20170051432A/ko unknown
- 2015-09-09 US US14/849,273 patent/US20160067116A1/en not_active Abandoned
- 2015-09-09 WO PCT/US2015/049176 patent/WO2016040474A1/en active Application Filing
- 2015-09-09 KR KR1020177005707A patent/KR20170052579A/ko unknown
- 2015-09-09 WO PCT/US2015/049186 patent/WO2016040483A1/en active Application Filing
- 2015-09-09 CN CN201580048261.3A patent/CN107072827A/zh active Pending
- 2015-09-09 JP JP2017533173A patent/JP2017529210A/ja active Pending
- 2015-09-09 EP EP15766716.3A patent/EP3191045B1/en active Active
- 2015-09-09 US US14/849,226 patent/US10265225B2/en active Active
- 2015-09-09 CN CN201580047869.4A patent/CN106687082B/zh active Active
- 2015-09-09 EP EP15766368.3A patent/EP3191043A1/en not_active Withdrawn
- 2015-09-09 EP EP15766715.5A patent/EP3191044B1/en active Active
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- 2015-09-09 JP JP2017533171A patent/JP6910297B2/ja active Active
- 2015-09-09 US US14/849,139 patent/US20160068721A1/en not_active Abandoned
- 2015-09-09 CN CN201580047864.1A patent/CN106794093A/zh active Pending
- 2015-09-09 MX MX2017002982A patent/MX2017002982A/es unknown
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- 2017-02-08 ZA ZA2017/00967A patent/ZA201700967B/en unknown
- 2017-03-09 CO CONC2017/0002335A patent/CO2017002335A2/es unknown
- 2017-03-09 CO CONC2017/0002333A patent/CO2017002333A2/es unknown
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| CN111727026A (zh) * | 2018-03-20 | 2020-09-29 | 宝洁公司 | 吸收制品中的粘结图案 |
| CN111727026B (zh) * | 2018-03-20 | 2022-05-31 | 宝洁公司 | 吸收制品中的粘结图案 |
Also Published As
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| EP3191044B1 (en) | 2019-11-06 |
| CN106687082B (zh) | 2021-03-09 |
| CN106687082A (zh) | 2017-05-17 |
| MX2017002984A (es) | 2017-09-01 |
| JP2017529210A (ja) | 2017-10-05 |
| KR20170052579A (ko) | 2017-05-12 |
| CO2017002335A2 (es) | 2017-06-09 |
| ZA201700967B (en) | 2019-06-26 |
| MX369600B (es) | 2019-11-13 |
| JP6707529B2 (ja) | 2020-06-10 |
| EP3191044A1 (en) | 2017-07-19 |
| EP3191045A1 (en) | 2017-07-19 |
| KR20170051432A (ko) | 2017-05-11 |
| JP2017534481A (ja) | 2017-11-24 |
| US10265225B2 (en) | 2019-04-23 |
| US20160067116A1 (en) | 2016-03-10 |
| CO2017002333A2 (es) | 2017-06-20 |
| MX2017002983A (es) | 2017-05-30 |
| US20160067117A1 (en) | 2016-03-10 |
| EP3191045B1 (en) | 2019-11-06 |
| MX369599B (es) | 2019-11-13 |
| US20160068721A1 (en) | 2016-03-10 |
| CN107072827A (zh) | 2017-08-18 |
| WO2016040474A1 (en) | 2016-03-17 |
| JP6910297B2 (ja) | 2021-07-28 |
| ZA201700966B (en) | 2019-07-31 |
| MX2017002982A (es) | 2017-05-30 |
| JP2017534413A (ja) | 2017-11-24 |
| WO2016040495A1 (en) | 2016-03-17 |
| WO2016040483A1 (en) | 2016-03-17 |
| EP3191043A1 (en) | 2017-07-19 |
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