Bonding using hot-melt adhesives
AssigneeHenkel AG & Co. KGaA
InventorsJuergen Lotz, Dirk Kasper, Lutz Pielert
Life of this patent
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Abstract
The invention relates to the use of a hot-melt adhesive having high hardness for adhesive bonding of metal films or foils, paper films or foils, and/or plastic films or foils. The invention further relates to a method for adhesively bonding a metal film or foil, paper film or foil, and/or plastic film or foil onto a substrate.
Claims22
A hot-melt adhesive comprising:
- (A) 10 to 80 wt % of at least one thermomechanically degraded polypropylene copolymer,
- (B) 5 to 60 wt % of at least one tackifying resin,
- (C) 0 to 40 wt % of at least one further additive,
- wherein the hot-melt adhesive has a Shore D hardness above 50 measured in accordance with DIN EN ISO 868:2003;
- wherein the components (A), (B) and (C) totals to 100 wt % of the hot-melt adhesive;
- and
- wherein the adhesive is adapted for bonding a film/foil selected from a metal film, metal foil, paper film, paper foil, plastic film or plastic foil.
An article comprising at least one adhesive layer of a hot-melt adhesive on a film/foil selected from a metal film, metal foil, paper film, paper foil, plastic film or plastic foil,
- wherein the hot-melt adhesive comprises:
- (A) 10 to 80 wt % of at least one thermomechanically degraded polypropylene copolymer,
- (B) 5 to 60 wt % of at least one tackifying resin,
- (C) 0 to 40 wt % of at least one further additive,
- and the hot-melt adhesive has a Shore D hardness above 50 measured in accordance with DIN EN ISO 868:2003.
A method for adhesively bonding a film/foil onto a substrate, comprising the steps of:
- (A) applying a hot-melt adhesive, having a Shore D hardness above 50 measured in accordance with DIN EN ISO 868:2003, onto one surface of the film/foil to form a coated film/foil;
- (B) activating the coated film/foil;
- (C) bringing together the coated film/foil and a substrate;
- and then
- (D) bonding the coated film/foil to the substrate with simultaneous application of pressure and temperature;
- wherein the hot-melt adhesive comprises (1) 10 to 80 wt % of at least one thermomechanically degraded polypropylene copolymer, (2) 5 to 60 wt % of at least one tackifying resin, and (3) 0 to 40 wt % of further additives;
- and
- wherein the film/foil selected from a metal film, metal foil, paper film, paper foil, plastic film or plastic foil.
A hot-melt adhesive comprising:
- (A) 61 to 80 wt % of at least one thermomechanically degraded polypropylene copolymer,
- (B) 5 to 60 wt % of at least one tackifying resin,
- (C) 0 to 40 wt % of at least one further additive,
- wherein the hot-melt adhesive has a Shore D hardness above 50 measured in accordance with DIN EN ISO 868:2003;
- wherein the components (A), (B) and (C) totals to 100 wt % of the hot-melt adhesive;
- and
- wherein the adhesive is adapted for bonding a film/foil selected from a metal film, metal foil, paper film, paper foil, plastic film or plastic foil.
Dependencies are inferred from the claim text.