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US 6,555,218 B2Granted
Flame retardant filters
AssigneeH. B. Fuller Licensing & Financing, Inc.
InventorsKristine D. Halloran, Cheryl Y. Chase
Life of this patent
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Abstract
The present invention relates to a flame retardant hot melt composition comprising from about 10% to about 60% by weight of the adhesive of at least one copolymer of ethylene, from about 10% to about 70% by weight of the adhesive of a flame retarding hydrated inorganic compound and from about 5% to about 35% by weight of at least one wax component.
Claims27
A High Efficiency Particulate Air Filter comprising:
- a) a material effective for filtering airborne contaminants;
- and
- b) a hot melt adhesive disposed on said material, said adhesive comprising
- i) from about 10% to about 60% by weight at least one copolymer of ethylene,
- ii) from about 10% to about 70% by weight hydrated inorganic flame retarding compound, and
- iii) from about 5% to about 35% by weight at least one high melting point wax, wherein said filter is pleated.
3 more elements
A High Efficiency Particulate Air Filter comprising:
- a) a material effective for filtering airborne contaminants;
- and
- b) a hot melt adhesive composition disposed on at least one surface of said material, said adhesive composition comprising
- i) from about 10% to about 60% by weight of at least one copolymer of ethylene having a melt index of greater than about 400 g/10 minutes,
- ii) from about 10% to about 70% by weight of at least one hydrated inorganic flame retarding compound, and
- iii) from about 5% to about 35% by weight of at least one wax component.
3 more elements
A filter comprising:
- a) a material effective for filtering airborne contaminants;
- and
- b) a hot melt adhesive composition disposed on at least one surface of said material, said hot melt adhesive composition comprising
- i) from about 10% to about 60% by weight of at least one copolymer of ethylene,
- ii) from about 10% to about 70% by weight of at least one hydrated inorganic flame retarding compound, and
- iii) from about 5% to about 35% by weight of at least one wax component,
- wherein said hot melt adhesive composition has a viscosity of less than about 30,000 cPs at about 150° C.
4 more elements
Dependencies are inferred from the claim text.