Water sensitive hot melt adhesives for nonwoven applications

Details Water sensitive hot melt adhesives for nonwoven applications Water sensitive hot melt adhesives for nonwoven applications

A - Human Necessities

61

L

A61L 15/22 (2006.01) B32B 7/12 (2006.01) B32B 27/12 (2006.01) C08F 283/06 (2006.01) C09J 151/08 (2006.01)

Patent

CA 2068036

Nonwoven assemblies bonded with water dispersible or sensitive hot melt adhesives comprising 50-100 parts of a graft copolymer of 40-85% of at least one vinyl monomer and 15-60% of at least one water soluble polyalkylene oxide polymer, and 0-50 parts by weight of tackifying resin. The compositions may also be employed as water sensitive binders in the manufacture of the nonwoven. Vinyl acetate is the preferred vinyl monomer whereas ethylene oxide homo- or copolymers are the preferred polyalkylene oxide. The use of tackifying resin is optional and may be undesirable for many of the applications.

Matières non tissées liées par des adhésifs thermofusibles, hydrodispersables ou sensibles à l'eau, renfermant de 50 à 100 parties d'un copolymère de greffe, de 40 à 85 % d'au moins un monomère vinylique et de 15 à 60 % d'au moins un polymère de poly(oxyde d'alkylène) hydrosoluble, ainsi que de 0 à 50 % en poids d'une résine de collage. Les compositions peuvent également être employées comme liants hydrosensibles pour la fabrication des non tissées. L'acétate de vinyle est le monomère privilégié, le poly(oxyde d'alkylène) étant l'homo- ou le copolymère préféré d'oxyde d'éthylène. L'utilisation de résine de collage est optionnelle et peut se révéler indésirable pour un grand nombre des applications.

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