A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 13/15 (2006.01) B32B 31/00 (1995.01)
Patent
CA 2268245
Absorbent articles such as diapers, incontinent articles, sanitary napkins, and the like are provided. More particularly, a coversheet for absorbent articles having a nonwoven and an apertured thermoplastic film and methods of laminating plural layers, at least one of which is a thermoplastic film and another a nonwoven are disclosed. The apertured thermoplastic film comprises from more than 0 % to less than 30 % of polypropylene and from more than 70 % to less than 100 % of polyethylene, and the nonwoven comprises at least polypropylene. The nonwoven and the apertured thermoplastic film are joined at least by applying pressure. A strong bond between the layers can be achieved due to both containing the same chemical component of polypropylene, while the manufacture of the film is easier with a lower temperature and vacuum being required, than if it consisted entirely of polypropylene.
L'invention concerne des articles absorbants, tels que des couches, des articles pour personnes incontinentes, des serviettes hygiéniques et analogues. Plus particulièrement, l'invention concerne une feuille de couverture destinée à des articles absorbants présentant un non-tissé et un film thermoplastique ajouré ainsi que des procédés de stratification de plusieurs couches, dont au moins une est un film thermoplastique et une autre un non-tissé. Le film thermoplastique ajouré comprend plus de 0 % à moins de 30 % de polypropylène et plus de 70 % à moins de 100 % de polyéthylène, et le non-tissé comprend au moins du polypropylène. Le non-tissé et le film thermoplastique ajouré sont joints au moins par application de pression. Une liaison forte entre les couches peut être obtenue du fait qu'elles contiennent toutes les deux le même constituant chimique polypropylène, et la production du film étant plus facile à une température plus basse et sous un vide nécessaire que si il se composait uniquement de polypropylène.
Sim & Mcburney
The Procter & Gamble Company
LandOfFree
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