Bostik, Inc.

Kathleen M Farris

Kimberly Eileen Secrist

Kevin J Stafeil

Jill Marie Scheu

Jill M Scheu

Kevin Stafeil

A hot melt adhesive composed of an ethylene vinyl acetate copolymer, a hydrogenated styrenic block copolymer, a tackifying resin, and a liquid plasticizer. The preferred ethylene vinyl acetate copolymer has a vinyl acetate content between 8 and 28 percent by weight, and the preferred hydrogenated styrenic block copolymer is a styrene-ethylene-butylene-styrene having about 30% styrene content and essentially no diblock. The hot melt gives excellent peel strength when used as a construction adhesive for disposable nonwoven articles. It can also be formulated to exhibit very low bleed through and blocking characteristics when used on low basis weight nonwoven fabrics.

Hot melt adhesive containing a hydrogenated styrenic block copolymer and an ethylene vinyl acetate copolymer exhibiting low blocking force

A hot melt adhesive composition, which may be used as a construction adhesive in hygiene articles, comprises a first polymer comprising a unimodal copolymer of propylene and ethylene and having a weight average molecular weight of between about 5,000 and 60,000 daltons; a second polymer comprising a copolymer of propylene and ethylene and having a weight average molecular weight of at least 100,000 daltons; a tackifying resin having a Ring & Ball softening point of at most 115&#xb0; C.; and a plasticizer. The composition demonstrates good peel strength and good shear resistance and is sprayable, with a sufficiently low viscosity, at low application temperatures, such as at about 121&#xb0; C.

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West Allis, WI, United States of America

Kathleen M Farris