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公开(公告)号：US20090286444A1
公开(公告)日：2009-11-19
申请号：US12120984
申请日：2008-05-15
CPC分类号： A61F13/4902 , B32B5/022 , B32B5/06 , B32B5/08 , B32B5/22 , B32B5/26 , B32B27/08 , B32B27/12 , B32B27/18 , B32B27/20 , B32B27/302 , B32B27/32 , B32B27/327 , B32B27/34 , B32B27/36 , B32B27/40 , B32B2262/0238 , B32B2262/0246 , B32B2262/0253 , B32B2262/0276 , B32B2262/0292 , B32B2262/04 , B32B2262/12 , B32B2270/00 , B32B2274/00 , B32B2307/51 , B32B2307/514 , B32B2307/702 , B32B2307/704 , B32B2307/72 , B32B2307/736 , B32B2437/00 , B32B2555/02 , Y10T442/601 , Y10T442/602
摘要： A nonwoven composite that exhibits latent elastic properties is provided. The composite is formed from a multi-layered, elastic film laminated to a nonwoven web facing. Latent elasticity is imparted to the composite through the use of at least one base layer that contains a thermoplastic elastomer and at least one skin layer that contains a propylene/α-olefin copolymer. During formation, the film is stretched in one or more directions to orient the elastomer chains. Without intending to be limited by theory, the present inventors believe that the oriented state of the chains may be held in place by the relatively stiff semi-crystalline domains of the propylene/α-olefin copolymer. The stretched elastic film may subsequently be relaxed and bonded to a nonwoven web facing to form the composite. The composite may be later activated (e.g., heated at or above the softening point of the copolymer) to soften the crystalline domains and allow the chains to return to their unoriented state. This causes the film to retract, which forms buckles in the nonwoven facing. In this manner, the resulting composite becomes elastic in that it has the ability to stretch and recover due to the “latent” buckle formation in the nonwoven facing.
摘要翻译： 提供了具有潜在的弹性特性的非织造复合体。 复合材料由层压到非织造织物面向上的多层弹性膜形成。 通过使用含有热塑性弹性体的至少一个基层和至少一个含有丙烯/α-烯烃共聚物的表层，赋予复合材料潜在弹性。 在形成期间，膜在一个或多个方向上拉伸以使弹性体链定向。 不期望受理论的限制，本发明人认为链的定向状态可以通过丙烯/α-烯烃共聚物的相对硬的半结晶域保持在适当的位置。 拉伸的弹性薄膜随后可以松弛并粘合到面向非织造织物以形成复合材料。 复合物可以稍后活化（例如，在共聚物的软化点或高于共聚物的软化点加热）以软化结晶域并允许链条恢复到其未取向状态。 这导致胶片收缩，这在非织造面部中形成带扣。 以这种方式，所得到的复合材料变得弹性，因为它具有由于非织造材料面中的“潜在的”带扣形成而拉伸和恢复的能力。
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公开(公告)号：US20080119102A1
公开(公告)日：2008-05-22
申请号：US11603953
申请日：2006-11-22
CPC分类号： A61F13/15585 , A61F13/4902 , B32B27/02 , B32B27/08 , B32B27/12 , B32B27/20 , B32B27/32 , Y10T156/10 , Y10T442/601
摘要： A nonwoven composite that exhibits latent elastic properties is provided. The composite is formed from an elastic film laminated to a nonwoven web facing. Latent elasticity may be imparted to the elastic film through the combination of a thermoplastic elastomer and a polyolefin capable of forming semi-crystalline domains among the amorphous elastomeric chains. More specifically, the elastic film may be stretched in one or more directions to orient the elastomer chains. Without intending to be limited by theory, the present inventors believe that the oriented state of the chains may be held in place by the relatively stiff semi-crystalline domains of the polyolefin. The stretched elastic film may subsequently be relaxed and bonded to a nonwoven web facing to form the composite. The composite may be later activated (e.g., heated) to shrink the elastic film and provide it with “latent” stretchability. For instance, the composite may be heated at or above the softening temperature of the polyolefin to soften the crystalline domains and allow the chains to return to their unoriented state. As a result of the present invention, the elastic film may be extended and recover from its unoriented state.
摘要翻译： 提供了具有潜在的弹性特性的非织造复合体。 复合材料由层压到非织造织物面向的弹性膜形成。 可以通过热塑性弹性体和能够在无定形弹性体链中形成半结晶域的聚烯烃的组合来赋予弹性薄膜潜在弹性。 更具体地，可以在一个或多个方向上拉伸弹性膜以使弹性体链定向。 不期望受理论的限制，本发明人认为链的定向状态可以通过聚烯烃的相对硬的半结晶域保持在适当的位置。 拉伸的弹性薄膜随后可以松弛并粘合到面向非织造织物以形成复合材料。 复合材料可以稍后被激活（例如加热）以收缩弹性膜并使其具有“潜在的”拉伸性。 例如，可以将复合材料加热至等于或高于聚烯烃的软化温度以软化结晶域并使链条恢复到其未取向状态。 作为本发明的结果，弹性膜可以从其未取向状态延伸并恢复。
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公开(公告)号：US07582178B2
公开(公告)日：2009-09-01
申请号：US11603953
申请日：2006-11-22
CPC分类号： A61F13/15585 , A61F13/4902 , B32B27/02 , B32B27/08 , B32B27/12 , B32B27/20 , B32B27/32 , Y10T156/10 , Y10T442/601
摘要： A nonwoven composite that exhibits latent elastic properties is provided. The composite is formed from an elastic film laminated to a nonwoven web facing. Latent elasticity may be imparted to the elastic film through the combination of a thermoplastic elastomer and a polyolefin capable of forming semi-crystalline domains among the amorphous elastomeric chains. More specifically, the elastic film may be stretched in one or more directions to orient the elastomer chains. Without intending to be limited by theory, the present inventors believe that the oriented state of the chains may be held in place by the relatively stiff semi-crystalline domains of the polyolefin. The stretched elastic film may subsequently be relaxed and bonded to a nonwoven web facing to form the composite. The composite may be later activated (e.g., heated) to shrink the elastic film and provide it with “latent” stretchability. For instance, the composite may be heated at or above the softening temperature of the polyolefin to soften the crystalline domains and allow the chains to return to their unoriented state. As a result of the present invention, the elastic film may be extended and recover from its unoriented state.
摘要翻译： 提供了具有潜在的弹性特性的非织造复合体。 复合材料由层压到非织造织物面向的弹性膜形成。 可以通过热塑性弹性体和能够在无定形弹性体链中形成半结晶域的聚烯烃的组合来赋予弹性薄膜潜在弹性。 更具体地，可以在一个或多个方向上拉伸弹性膜以使弹性体链定向。 不期望受理论的限制，本发明人认为链的定向状态可以通过聚烯烃的相对硬的半结晶域保持在适当的位置。 拉伸的弹性薄膜随后可以松弛并粘合到面向非织造织物以形成复合材料。 复合材料可以稍后被激活（例如加热）以收缩弹性膜并使其具有“潜在的”拉伸性。 例如，可以将复合材料加热至等于或高于聚烯烃的软化温度以软化结晶域并使链条恢复到其未取向状态。 作为本发明的结果，弹性膜可以从其未取向状态延伸并恢复。
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