Adhesive alloys and filter medias including such adhesive alloys
AssigneeCummins Filtration IP, Inc.
InventorsWilliam C. Haberkamp, Kan Wang
Life of this patent
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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 %.
Claims20
An adhesive alloy, comprising:
- a thermally activated adhesive having a first melting temperature;
- and
- a polymer having a second melting temperature greater than the first melting temperature;
- wherein a ratio of the thermally activated adhesive in the adhesive alloy is in a range of 5 wt % to 70 wt %.
A filter media, comprising:
- a first filter media layer;
- a second filter media layer;
- and
- at least one adhesive alloy layer comprising an adhesive alloy disposed between the first filter media layer and the second filter media layer, the adhesive alloy comprising:
- a thermally activated adhesive having a first melting temperature, and
- a polymer having a second melting temperature greater than the first melting temperature,
- wherein a ratio of the thermally activated adhesive in the adhesive alloy is in a range of 5 wt % to 70 wt %.
A method for forming a filter media, comprising:
- mixing a first amount of a thermally activated adhesive with a second amount of a polymer to form a mixture;
- at least one of dry blending or compounding the mixture to form an adhesive alloy;
- melt blowing the adhesive allow onto a surface of a first filter media layer to form a non-woven adhesive alloy layer disposed on the first filter media layer;
- heating at least the adhesive alloy layer to a temperature greater than a softening temperature of the adhesive alloy but lower than a melting temperature of the adhesive alloy;
- disposing a second filter media layer over the heated adhesive alloy layer;
- and
- cooling the adhesive alloy layer to a temperature below the softening temperature of the adhesive alloy, causing the adhesive alloy layer to harden and bond to each of the first filter media layer and the second filter media layer,
- wherein a ratio of the thermally activated adhesive in the adhesive alloy is in a range of 5 wt % to 70 wt %.
A filter media formed by a process comprising:
- mixing a first amount of a thermally activated adhesive with a second amount of a polymer to form a mixture;
- at least one of dry blending or compounding the mixture to form an adhesive alloy;
- melt blowing the adhesive allow onto a surface of a first filter media layer to form a non-woven adhesive alloy layer disposed on the first filter media layer;
- heating at least the adhesive alloy layer to a temperature greater than a softening temperature of the adhesive alloy but lower than a melting temperature of the adhesive alloy;
- disposing a second filter media layer over the heated adhesive alloy layer;
- and
- cooling the adhesive alloy layer to a temperature below the softening temperature of the adhesive alloy, causing the adhesive alloy layer to harden and bond to each of the first filter media layer and the second filter media layer,
- wherein a ratio of the thermally activated adhesive in the adhesive alloy is in a range of 5 wt % to 70 wt %.
Dependencies are inferred from the claim text.