LOFTY SPUNBOND NONWOVEN LAMINATE

摘要

The present invention is a laminate of a low loft layer, the first layer, and a high loft layer, the second layer. More specifically, the present invention provides a nonwoven laminate containing a first layer from thermoplastic spunbond filaments having an average denier less than about 1.8 dpf (2.0 dtex); and a second layer containing thermoplastic multicomponent spunbond filaments having an average denier greater than about 2.3 dpf (2.55 dtex). The laminate has a structure such that the density of the first layer is greater than the density of the second layer and the thickness of the second layer is greater than the thickness of the first layer. Also disclosed is a laminate containing the laminate of a low loft layer containing spunbond filaments having an average denier less than 1.8 dpf (2.0 dtex), a high loft layer containing thermoplastic multicomponent spunbond filaments having an average denier greater than about 2.3 dpf (2.55 dtex) and layer containing a meltblown nonwoven web. The meltblown layer may be between the high loft layer and the low loft layer, adjacent to the high loft layer and opposite the low loft layer, adjacent to the low loft layer and opposite the high loft layer. Additionally, the present invention relates to a thermal or acoustical insulation material which contains the laminate of the high loft layer and the low loft layer, or the laminate of the low loft layer, the high loft layer and a meltblown nonwoven web. Also disclosed is a method of attenuating sound waves passing from a sound source area to a second area. The method includes positioning an acoustical insulation material containing the nonwoven laminate of the present invention between the sound source area and the second area.