LATENT ELASTIC COMPOSITE FORMED FROM A MULTI-LAYERED FILM

摘要

Potential is a non-woven composite material is provided showing the elastic properties. Complex is formed from a multi-layered elastic film laminated to a non-woven web facing. Elastic potential is applied to the composite through the use of one or more skin layers containing at least one base layer and a propylene / a-olefin copolymer containing a thermoplastic elastomer. During the formation, by stretching the film in one direction, thereby orienting the elastomeric chain. While not intended to be limited by theory, the present inventors considered that the alignment state of the chain can be held in place by the relatively rigid semi-crystalline domains in the propylene / a-olefin copolymer. Then relaxing the elongated elastic film, the nonwoven web is to bond the facing to form a composite. Activating a complex later (for example, heating at least the softening point of the copolymer) to soften the crystalline domains, it is possible to restore the chain to its non-aligned state. This forms the non-woven facing the buckling to shrink the film. In this way, the resulting composite is in the non-woven facing "potential" because of the buckling form and has a height that is the elastic recovery capability, in that. ;