Back to results
US 11,049,421 B2Granted
Label assemblies for adverse environments
AssigneeAvery Dennison Corporation
InventorPavel Janko
Life of this patent
Estimating the term…
Abstract
Various labels for use in adverse environments are described. The labels are particularly well suited for applications in which a permanent label bond is required. The labels utilize a two stage adhesive which is initially in the form of a pressure sensitive adhesive (PSA) and then upon heating, converted to a permanent non-PSA.
Claims25
A label assembly comprising:
- a first face layer defining a first face and an oppositely directed second face;
- and
- a two stage adhesive disposed on at least one of the first face and the second face of the first face layer, the two stage adhesive exhibiting a first stage in which the adhesive is initially in the form of a pressure sensitive adhesive (PSA) and upon exposure to heat, converts from the pressure sensitive adhesive (PSA) to a permanent, non-PSA,
- wherein the pressure sensitive adhesive comprises 10-90 wt % of an acrylic backbone base polymer having molecular weight (Mw) of 5,000 to 1,000,000,
- wherein the two stage adhesive converts from the PSA to the permanent, non-PSA adhesive upon exposure to a temperature with a range of from 80° C. to 240° C., and
- wherein the heat exposure is for a time period of about 1 second to about 200 seconds.
3 more elements
A label assembly comprising:
- a first face layer defining a first face and an oppositely directed second face;
- and
- a two stage adhesive composition disposed on at least one of the first face and the second face of the first face layer, the two stage adhesive exhibiting a first stage in which the adhesive is initially in the form of a pressure sensitive adhesive (PSA) non exposure to heat, converts from the pressure sensitive adhesive (PSA) to a permanent, non-PSA,
- wherein the pressure sensitive adhesive comprises 10-90 wt % of an acrylic backbone base polymer having a molecular weight (Mw) of a 5,000 to 1,000,000, and
- wherein the thickness of the first face layer is from about 20 microns to about 150 microns.
2 more elements
A label assembly comprising:
- a first face layer defining a first face and an oppositely directed second face;
- and
- a two stage adhesive disposed on at least one of the first face and the second face of the first face layer, the two stage adhesive exhibiting a first stage in which the adhesive is initially in the form of a pressure sensitive adhesive (PSA) and upon exposure to heat, converts from the pressure sensitive adhesive (PSA) to a permanent, non-PSA,
- wherein the pressure sensitive adhesive comprises 10-90 wt % of an acrylic backbone base polymer having a molecular weight (Mw) of 5,000 to 1,000,000,
- wherein the glass transition temperature (Tg) of the acrylic backbone base polymer is less than 50° C., and
- wherein the first face layer is selected from the group consisting of polyvinyl chloride (PVC) film, polyethylene terephthalate (PET) film, polyolefin film, polyamide film, synthetic textiles, synthetic leathers, paper, fiber glass, polyvinylidene fluoride (PVF) film, metal foils, ceramics, natural leather, and combinations thereof.
3 more elements
Dependencies are inferred from the claim text.