Fragrance compositions and delivery systems
A dry fragrance composition having from about 0.1 to about 20%, by total carrier weight, of a fragrance composition substantially uniformly deposited on the surface of a nonabsorbent solid inorganic particulate substrate is used to impart a fragrance to a second material. The nonabsorbent solid inorganic particulate substrate can be an alkali metal chloride, sulfates, or tripolyphosphates, soda ash, borax, or a zeolite.
1. A fragrance delivery system consisting essentially of:
(i) a source of fragrance;
(ii) a sealed envelope of a polymeric film completely enveloping the fragrance source, said film being permeable to the fragrance at a controlled rate less than the rate of release of fragrance from the fragrance source; and
(iii) an outer sheath of flexible material retaining said sealed envelope and having permeability to the fragrance exceeding the permeability of the sealed envelope to the fragrance,
whereby the fragrance is released into the ambient surroundings at the rate determined only by permeability of the polymeric film.
2. A fragrance delivery system according to claim 1 wherein the fragrance source consists of pure fragrance.
3. A fragrance delivery system according to claim 1 wherein the fragrance source is fragrance carried on a carrier.
4. A fragrance delivery system according to claim 3 wherein carrier is sodium chloride.
5. A fragrance delivery system according to claim 1 wherein the fragrance source is latent but operative when activated by moisture or heat.
6. A fragrance delivery system according to claim 1 wherein the polymeric film of the envelope comprises a polyolefin.
7. A fragrance delivery system according to claim 6 wherein the polyolefin comprises polyethylene.
8. A fragrance delivery system according to claim 6 wherein the polyolefin comprises polypropylene.
9. A fragrance delivery system according to claim 1 wherein the envelope comprises polyvinyl chloride.
10. A fragrance delivery system according to claim 1 wherein the polymeric film is perforated.
11. A fragrance delivery system according to claim 1 wherein the polymeric film is laminated to said outer sheath.
12. A fragrance delivery system according to claim 1 wherein the polymeric film is deposited on said outer sheath.
13. A fragrance delivery system according to claim 1 wherein the sheath is a nonwoven.
14. A fragrance delivery system according to claim 1 wherein the envelope and outer sheath are a composite of polymeric film covering one face of nonwoven material with said polymeric film being joined around a portion of the perimeter of the composite at least sufficient to define said envelope.