Absorbent article comprising microporous film

Details Absorbent article comprising microporous film Absorbent article comprising microporous film

A - Human Necessities

61

F

A61F 13/15 (2006.01)

Patent

CA 2322455

An absorbent article having a breathable microporous film is disclosed. The breathable microporous film is made by stretching a mixture of a thermoplastic resin and inorganic fillers at least in one direction. At least a part of the breathable microporous film is deformed such that Z number specified by equation (1) is 3.0 or above, wherein MS: average material strain at break of breathable microporous film; AS: average applied strain for deformation; N: neck down prevention coefficient; .sigma.MS: standard deviation of material strain at break; .sigma.AS: standard deviation of applied strain.

La présente invention concerne un article absorbant muni d'un film microporeux respirant. Ce film microporeux respirant est fabriqué par étirement dans au moins une direction d'un mélange de résine thermoplastique et de charges inorganiques. Au moins une partie du film microporeux respirant est déformée de façon qu'un nombre Z déterminé par l'équation (1) suivante est supérieur ou égal à 3,0: dans laquelle MS représente la contrainte matérielle moyenne à la rupture du film microporeux respirant; AS représente la contrainte moyenne appliquée de déformation; N représente le coefficient de prévention de striction; sigma MS représente l'écart-type de la contrainte matérielle à la rupture; et sigma AS représente l'écart-type de la contrainte appliquée.

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