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US 10,370,567 B2Granted
Hot melt adhesive
AssigneeHenkel AG & Co. KGaA
InventorsMasahiro Moriguchi, Shigekazu Saito
Life of this patent
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Abstract
The present invention provides a hot melt adhesive for high-speed coating and spiral coating at low temperature. The hot melt adhesive has excellent adhesion to polyethylene and nonwoven fabric, and is suitable for disposable products. The hot melt adhesive comprises: (A) a propylene homopolymer having a melting point of 100° C. or lower which is obtainable by polymerizing propylene using a metallocene catalyst; and (B) an ethylene-based copolymer.
Claims5
A hot melt adhesive, comprising:
- (A) a propylene homopolymer which has a melting point not higher than 100° C. and is obtainable by polymerizing propylene with a metallocene catalyst;
- (B) an ethylene-based copolymer;
- (C) a tackifier resin;
- and
- (D) an oil,
- wherein (A) the propylene homopolymer comprises both (A1) a propylene homopolymer having weight average molecular weight not more than 60,000 and (A2) a propylene homopolymer having weight average molecular weight more than 60,000,
- wherein (B) the ethylene-based copolymer comprises an ethylene/α-olefin copolymer, and the ethylene/α-olefin copolymer comprises an ethylene/propylene copolymer, and
- wherein the combined (A) the propylene homopolymer and (B) the ethylene-based copolymer is 100 parts by weight of the total weight of the hot melt adhesive;
- wherein (A) the propylene homopolymer is 60 to 95 parts by weight per 100 parts by weight of the combined (A) the propylene homopolymer and (B) the ethylene-based copolymer;
- wherein (C) the tackifier resin is 20 to 180 parts by weight of the total weight of the hot melt adhesive;
- and
- wherein (D) the oil is 40 to 120 parts by weight of the total weight of the hot melt adhesive.
9 more elements
Dependencies are inferred from the claim text.