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ABSORBENT ARTICLE CONTAINING A LAYER OF RESPIRABLE MATERIAL
专利权人:
SCA HYGIENE PRODUCTS AB
发明人:
CHARLOTTA HANSSON,INGRID GUSTAFSON,MARIA FERNKVIST
申请号:
BRPI0719372
公开号:
BRPI0719372B1
申请日:
2007.12.07
申请国别(地区):
BR
年份:
2018
代理人:
摘要:
An absorbent article includes a breathable backsheet material layer. At least a part of the layer includes a polymeric material exhibiting a discontinuous change in free volume in response to any of the following conditions or variables: liquid contact, the presence of certain ions, temperature and/or pH. One example of such polymeric materials is side chain liquid crystalline polymers which are able to undergo a phase transition between an isotropic phase and a nematic phase. The discontinuous change in free volume involves an abrupt change of the permeability of the breathable material layer.
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