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US 12,427,457 B2Granted
Adhesive alloys and filter medias including such adhesive alloys
AssigneeCummins Filtration IP, Inc.
InventorsWilliam C. Haberkamp, Kan Wang
Life of this patent
Estimating the term…
Abstract
Embodiments described herein relate generally to adhesive alloys and their use in filter media, and in particular to adhesive alloys that can be melt blown onto a filter media layer, and which are thermally activated to bond the filter media layer to another filter media layer. An adhesive alloy is provided. A thermally activated adhesive has a first melting temperature. A polymer has a second melting temperature greater than the first melting temperature. A ratio of the thermally activated adhesive in the adhesive alloy is in a range of 5 wt % to 70 wt %.
Claims14
A filter media, comprising:
- a first filter media layer;
- a second filter media layer;
- a first adhesive alloy layer comprising a first adhesive alloy disposed between the first filter media layer and the second filter media layer, the first adhesive alloy comprising:
- a thermally activated adhesive having a first melting temperature, and
- a polymer blended with the thermally activated adhesive, the polymer having a second melting temperature greater than the first melting temperature,
- wherein a ratio of the thermally activated adhesive in the first adhesive alloy is in a range of 5 wt % to 70 wt %;
- and
- a second adhesive alloy layer comprising a second adhesive alloy disposed on the first adhesive alloy layer, the second adhesive alloy comprising:
- the thermally activated adhesive having the first melting temperature, and
- the polymer blended with the thermally activated adhesive, the polymer having the second melting temperature,
- wherein a ratio of the thermally activated adhesive in the second adhesive alloy is in a range of 5 wt % to 70 wt %;
- wherein the ratio of the thermally activated adhesive in the second adhesive alloy is greater than the ratio of the thermally activated adhesive in the first adhesive alloy,
- wherein the first adhesive alloy layer is different from the second adhesive alloy layer and the first adhesive alloy is different from the second adhesive alloy, and
- wherein the first adhesive alloy layer and the second adhesive alloy layer have a first porosity that is greater than a second porosity of the first filter media layer or the second filter media layer.
11 more elements
A filter media formed by a process comprising:
- mixing a first amount of a thermally activated adhesive with a polymer to form a mixture;
- at least one of dry blending or compounding the mixture to form a first adhesive alloy;
- melt blowing the first adhesive alloy onto a surface of a first filter media layer to form a first non-woven adhesive alloy layer disposed on the first filter media layer;
- melt blowing a second adhesive alloy comprising a second amount of the thermally activated adhesive and the polymer onto a surface of the first adhesive alloy to form a second non-woven adhesive alloy layer disposed on the first adhesive alloy;
- heating at least the first non-woven adhesive alloy layer to a temperature greater than a softening temperature of the first adhesive alloy but lower than a melting temperature of the first adhesive alloy;
- disposing a second filter media layer over the second non-woven adhesive alloy layer;
- and
- cooling the first non-woven adhesive alloy layer to a temperature below the softening temperature of the first adhesive alloy, causing the first non-woven adhesive alloy layer to harden and bond to each of the first filter media layer and the second adhesive alloy,
- wherein a ratio of the thermally activated adhesive in the first adhesive alloy is in a range of 5 wt % to 70 wt %,
- wherein a ratio of the thermally activated adhesive in the second adhesive alloy is in a range of 5 wt % to 70 wt %,
- wherein the ratio of the thermally activated adhesive in the second adhesive alloy is greater than the ratio of the thermally activated adhesive in the first adhesive alloy,
- wherein the first adhesive alloy is different from the second adhesive alloy and the first non-woven adhesive alloy layer is different from the second non-woven adhesive alloy layer, and
- wherein the first adhesive alloy layer the second adhesive alloy layer have a first porosity that is greater than a second porosity of the first filter media layer or the second filter media layer.
10 more elements
Dependencies are inferred from the claim text.