CA2053557C - Shaving system - Google Patents
Shaving systemInfo
- Publication number
- CA2053557C CA2053557C CA 2053557 CA2053557A CA2053557C CA 2053557 C CA2053557 C CA 2053557C CA 2053557 CA2053557 CA 2053557 CA 2053557 A CA2053557 A CA 2053557A CA 2053557 C CA2053557 C CA 2053557C
- Authority
- CA
- Canada
- Prior art keywords
- shaving
- water
- shaving aid
- essential oil
- insoluble
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A shaving unit that comprises at least one blade and a shaving composite has a surface for engaging the user's skin adjacent the blade edge. The shaving unit may be of a disposable cartridge type adapted for coupling to and uncoupling from a razor handle or may be integral with a handle so that the complete razor is discarded as a unit when the blade or blades become dulled. The blade edge (or edges) cooperate with skin engaging surfaces to define shaving geometry. The skin-engaging surface includes a shaving aid composite that is a mixture of water insoluble matrix material, an effective amount of shaving aid material, and an effective amount of water-insoluble essential oil material, the water-insoluble essential oil material being delivered from the shaving aid composite concurrently with the delivery of the water-leachable shaving aid material during shaving to apply at least about one nanogram of the essential oil to the skin surface per square centimeter of skin surface.
Description
S~VTNG SYSl'EM
Thi~ invention relates to shaving systems, and more particularly to shaving systems of the wet shave type.
~n shaving systems o~ the wet ~have type, factors such a~ the ~rictional drag of the razor acros~
the skln, the ~orce neQd~d to sQver hair~, and irritation of preexi~ting skin damage can create a degree of ~having di~comfort. Discomfort, and other problem~ accompanying w~t shaving systQms, can be alleviated by thQ application of shaving aid~ to the skin. Shaving aid~ may be applied prior to, during, or after shaving. A numb~r o~ problem~ accompany the u~e of pre- and post-applied shaving aids. Pre-applied-shaving aids can evaporatQ or can be carried away fromthe ~it- of application by repeated ~trokQs of the razor. Post-applied-shaving aid~ are not present on the skin during shaving and thu~ their application may be to late to prevent an unwanted affect. Both pre-applied and post-applied ~having aids add additional steps to the shaving process.
Proposals have been made to incorporats a shaving aid e.g., lubricant, whisker softener, razor cleanser, medicinal agcnt, cosmetic agent or combination thereof, into a razor, e.g., by frictionally securing a shaving aid ln a recQss on the razor, by incorporating a shaving aid directly into one or more molded polymeric CAS~: 7929 ~ 0 5 3 5 5 7 components of the razor, by adhesively securing a shaving aid composite to the razor, and by use of a mech~nical connection between a shaving aid composite and the razor. A water-soluble shaving aid, e.g. polyethylene oxide, has been mixed with non-water-soluble material, e.g., a polystyrene polymer, to form an insoluble polymer/soluble shaving aid composite. The composite has been mounted on razor and shaving cartridge structures, adjacent the shaving edge or edges, of single or multiple blade shaving system. Upon exposure to water, the water-soluble shaving aid leaches from the composite onto the skin.
In accordance with one aspect of the invention, there is provided a shaving unit that comprises at least one blade and a shaving composite that has a surface for engaging the user's skin adjacent the blade edge. The shaving unit may be of a disposable cartridge type adapted for coupling to and uncoupling from a razor handle or may be integral with a handle so that the complete razor ie ~;r~rded as a unit when the blade or blades become dulled the blade edge (or edges) cooperate with skin engaging surfaces to define shaving geometry. The skin-engaging surface includes a shaped shaving aid composite that is a mixture of water insoluble matrix material, an effective amount of shaving aid material, and an effective amount of water-insoluble essential oil material, the water-insoluble essential oil material being delivered from the shaving aid composite concurrently with the delivery of the water-leachable shaving aid material during shaving to apply at least about one nanogram of the essential oil to the skin surface per square centimetre of skin surface.
Preferably, the shaving aid composite is of extrusion-oriented material, and comprises 20-40% by weight of the matrix material, 40-75% by weight of the water-leachable shaving aid material, and 2-20% by ~s~
Thi~ invention relates to shaving systems, and more particularly to shaving systems of the wet shave type.
~n shaving systems o~ the wet ~have type, factors such a~ the ~rictional drag of the razor acros~
the skln, the ~orce neQd~d to sQver hair~, and irritation of preexi~ting skin damage can create a degree of ~having di~comfort. Discomfort, and other problem~ accompanying w~t shaving systQms, can be alleviated by thQ application of shaving aid~ to the skin. Shaving aid~ may be applied prior to, during, or after shaving. A numb~r o~ problem~ accompany the u~e of pre- and post-applied shaving aids. Pre-applied-shaving aids can evaporatQ or can be carried away fromthe ~it- of application by repeated ~trokQs of the razor. Post-applied-shaving aid~ are not present on the skin during shaving and thu~ their application may be to late to prevent an unwanted affect. Both pre-applied and post-applied ~having aids add additional steps to the shaving process.
Proposals have been made to incorporats a shaving aid e.g., lubricant, whisker softener, razor cleanser, medicinal agcnt, cosmetic agent or combination thereof, into a razor, e.g., by frictionally securing a shaving aid ln a recQss on the razor, by incorporating a shaving aid directly into one or more molded polymeric CAS~: 7929 ~ 0 5 3 5 5 7 components of the razor, by adhesively securing a shaving aid composite to the razor, and by use of a mech~nical connection between a shaving aid composite and the razor. A water-soluble shaving aid, e.g. polyethylene oxide, has been mixed with non-water-soluble material, e.g., a polystyrene polymer, to form an insoluble polymer/soluble shaving aid composite. The composite has been mounted on razor and shaving cartridge structures, adjacent the shaving edge or edges, of single or multiple blade shaving system. Upon exposure to water, the water-soluble shaving aid leaches from the composite onto the skin.
In accordance with one aspect of the invention, there is provided a shaving unit that comprises at least one blade and a shaving composite that has a surface for engaging the user's skin adjacent the blade edge. The shaving unit may be of a disposable cartridge type adapted for coupling to and uncoupling from a razor handle or may be integral with a handle so that the complete razor ie ~;r~rded as a unit when the blade or blades become dulled the blade edge (or edges) cooperate with skin engaging surfaces to define shaving geometry. The skin-engaging surface includes a shaped shaving aid composite that is a mixture of water insoluble matrix material, an effective amount of shaving aid material, and an effective amount of water-insoluble essential oil material, the water-insoluble essential oil material being delivered from the shaving aid composite concurrently with the delivery of the water-leachable shaving aid material during shaving to apply at least about one nanogram of the essential oil to the skin surface per square centimetre of skin surface.
Preferably, the shaving aid composite is of extrusion-oriented material, and comprises 20-40% by weight of the matrix material, 40-75% by weight of the water-leachable shaving aid material, and 2-20% by ~s~
2~35S7 weight o~ the essential oil material. The shaving aid composition may further include a release enhancing agent ~elected from the group eonsisting of polyethylene glycol, methoxypolyethylene glycol, methylcellulose, and carboxypolymethylene.
Suitable water-insoluble matrix materials inel~de, for example, polyethylene, polypropylene, polystyrene and polyacetyl. Suitable shaving aid material~ inelude, for exampl-, polyethylene oxide, polyvinyl pyrrolidone, polyaerylamlde, hydroxypropyl cellulosQ, polyvinyl imidazonline, polyhydroxyethylmethacry~ate, ~ilicone copolymers, suero~e ~tearate, vitamin E, panthenol and aloe.
Suitable essential oil material~ inelude menthol, lS eugenol toil of elove), euealyptol (oil of eucalyptus and oil of ca~eput), safrol (oil of sassafras~ and methyl salicylate toil of wintergrQen).
In particular embodiment~, the shaving agent CompositQ i~ a member of extrusion-oriented blend of ~polymerie materials that eontains water-soluble and water-insoluble material~, the nature and relative proportions of the water-soluble and water-insoluble polymerie materials being such that the member has adeguate meehanical ~trength, both a~ initially produeed and after a significant amount of the water-soluble material ha~ been leaehed out.
In aecordance with another aspQct, there i8 pro~ided a p~ooe~ for forming a shaped ~having aid compo~ite for a shaving system of the wet ~have type that include~ a matrix of water-in~oluble pol~merie material, an effective amount Or water-leachable shaving aid material, and an effectlve amount of water-insoluble essential oil material, the process including the ateps of forming a blend of the water-insoluble polymerie material and the water-leachable ~having aid material, addinq the water-insoluble essential oil material in particulate to form to the blend at a .
te~peratur- of less than 100-C. to foru a mixture, and ~xtruding the mixturQ in lecs than one minute after the essential oil material i~ added to form thQ shaped shaving a$d composite.
Other features and advantages will be seen as the following description of particular embodiments progressQs, in con~unction with the drawings, in which:
Fig. 1 is a pe~e~-ive view of a razor unit in accordance with the invention;
Fig. 2 is a s~ctional view takon along thQ
lin~ 2-2 of Fig. l; and Fig. 3 is a pe~pe~ivQ ViQW of another razor unit ln accordance with the lnvention.
Th~ shaving unit 10 shown in Figs. 1 and 2 lnclude~ basQ or platform member 12 molded of high ~ impact polys~y~ene that include~ integral coupling groove structurQ 14 for attachment to a razor handle and guard structure 16 that defines a transvQrsely extending forward ~kin engaging ~urfac- 18. On tho upper surfacQ
of platform 12 are disposed steel leading blade 20 having a sharp2ned edge 22, ste~l ~ollowing blade 24 having sharpened edge 26, and aluminum ~pacer member 28 that maintaln~ blade~ 20 and 24 in spaced relation. Cap m~mbor 30 i~ ~olded o~ high impact polystyrenQ and has body portlon 32 that defines skin engaging surface 34 that QxtQnds transversQly between forwardly pro~ecting end wall~ 36 and has a front edge 38 that is disposed r~arwardly o~ blade Qdge 26. Integral rivet portions 40 extend downwardly from transv~rsQly extending body portlon 32 and pas~ through hole~ in blade~ 20 and 24, spacer 28, and platform 12 to secure cap 30, blades 20, 24 and spacQr 28 on platform 12. Adhesively affixed to s~in engaging sur~ace 34 is shaving aid composite 42.
The shaving unit 50 ~hown in Fig. 3 i~ of the type shown ln Jacob~on U.S. Patent 4,586,255 and includes body 52 with front portion 5~ and rear portion 56. Re~iliently secured in body 52 are guard member 58, s ~Q 5~557 ;-leading blade unit 60 and trailing blade unit 62. A shaving aid composite in the form of elongated insert member 64 is frictionally locked in opening 66 of rear portion 56.
The following examples show by way of illustration and not by way of limitation practice of the invention.
Example 1 A blend is formed of about thirty-one percent by weight high impact polystyrene; fifty percent by weight of a water soluble polymer (specifically a mixture of sixty percent by weight Polyox* Coagulant polyethylene oxide five million molecular weight and forty weight percent Polyox* WSRN-750 polyethylene oxide -- 300,000 molecular weight); nine percent by weight of water soluble polyethylene glycol (4,500 molecular weight); and ten percent by weight of menthol. The blend includes color dye and antioxidant additives in minor amounts.
The blend is extruded through a nineteen millimeter diameter screw extruder. The menthol is fed into the mixture in small particulate form (particles of about forty microns or less in size) and is mixed with the other constituents and extruded with a residence time in the extrusion system of less than one minute. The feed zone (input to the barrel) is at a temperature of about 80~C, intermediate barrel temperatures are about 130~C and 160~C and the die is at a temperature of about 180~C. The barrel pressure is about 1,800 psi and the die pressure is about 2,400 psi. An extruded strip member of cross sectional shape indicated in Fig. 3 is formed. Members 64 are sliced from the extruded strip and secured in openings 66 of shaving units 50. The resulting extruded member 64 is sturdy and has an attractive appearance, and the resulting cartridge 50 possesses good overall shaving performance.
Example 2 A blend is formed of about thirty-two percent by weight high impact polystyrene; fifty-two percent by weight of a water soluble * Trade-mark Icd:mls ~o~iSS7 polymer (specifically a mixture of sixty percent by weight Polyox*
Coagulant polyethylene oxide five million molecular weight and forty weight percent Polyox* WSRN-750 polyethylene oxide -- 300,000 molecular weight); nine percent by weight of water soluble polyethylene glycol (4,500 molecular weight); and six percent by weight of menthol. The blend includes color dye and antioxidant additives in minor amounts. The blend is extruded through an extruder. The menthol is fed into the mixture in small particulate form (particles of fifty-one hundred microns in size) and is mixed with the other constituents. The water-cooled feed zone (input to the barrel) is at a temperature of about 17~C, intermediate barrel temperatures are about 120~C and 160~ and the die is at a temperature of about 160~C. The barrel pressure is about 2,700 psi and the die pressure is about 1,900 psi. An extruded strip member of cross sectional shape indicated in Fig. 3 is formed. Members 64 are sliced from the extruded strip and secured in openings 66 of shaving units 50. The resulting extruded member 64 is sturdy and has an attractive appearance, and the resulting cartridge 50 possesses good overall shaving performance.
Example 3 A blend is formed of about thirty-one percent by weight high impact polystyrene; fifty percent by weight of a water soluble polyethylene oxide; nine percent by weight of water soluble polyethylene glycol (4,500 molecular weight); and ten percent by weight of menthol. The blend is extruded through an extruder. The menthol is fed into the mixture in small particulate form and is mixed with the other constituents and extruded with a residence time in the extrusion system of less than one minute. The feed zone (input to the barrel) is at a temperature of about 120~C, the barrel * Trade-mark k~
~ ~ 5 3 5 ~ 7 temperature is about 160~C. and the die is at a temperature of about 160~C. An extruded strip member of cross sectional shape indicated in Fig. 3 is formed. Members 64 are sliced from the extruded strip and secured in openings 66 of shaving units 50.
The resulting extruded member 64 is sturdy and has an attractive appearance, and the resulting cartridge 50 possesses good overall shaving performance.
Ex~mple ~
A blend is formed of about twenty-seven percent by weight high impact polystyrene; forty-five percent by weight of water-soluble polyethylene oxide: eight percent by weight of water-soluble polyethylene glycol (4,500 molecular weight); and twenty percent by weight of menthol. The blend is extruded through an extruder, and the menthol is fed into the mixture in small particulate form and is mixed with the other constituents and extruded with a residence time in the extrusion system of less than one minute. The feed zone (input to the barrel) is at a temperature of about 80~C., the barrel temperature is about 160~C. and the die is at a temperature of about 180~C.
An extruded strip member of cross sectional shape indicated in Fig. 3 is formed. Members 64 are sliced from the extruded strip and secured in openings 66 of shaving units 50. The resulting extruded member 64 is s~urdy and has an attractive appearance, and the resulting cartridge 50 possesses good overall shaving performance.
The water-insoluble menthol is dispersed from the cartridge insert with the polyethylene oxide lubricant and tends to reduce the level of irritation produced upon shaving and to improve the overall comfort and quality of the shave.
The resulting quantity of the menthol in insert 64 is about three percent, a portion of which is associated with the polystyrene and about twenty percent of the original quantity ~s~
- ~a~5~7 of the menthol in the insert member remains with the polystyrene residue after the polyethylene oxide and other water-extractable materials have been completely leached from insert 64.
The system delivers about fifteen nanograms of menthol per square centimetre of the skin and about two-thirds of the delivered menthol is substantive. Inserts 64 containing about three percent menthol were shown to deliver about five mi~,o~Lams of menthol to the face during shaving (as determined by gas chromatography/mass spectrometry, analysis of alcohol extracts of the skin surface). After rinsing, about two-thirds of the delivered menthol; i.e., 3.3 micrograms, remained on the skin.
~s,~
Suitable water-insoluble matrix materials inel~de, for example, polyethylene, polypropylene, polystyrene and polyacetyl. Suitable shaving aid material~ inelude, for exampl-, polyethylene oxide, polyvinyl pyrrolidone, polyaerylamlde, hydroxypropyl cellulosQ, polyvinyl imidazonline, polyhydroxyethylmethacry~ate, ~ilicone copolymers, suero~e ~tearate, vitamin E, panthenol and aloe.
Suitable essential oil material~ inelude menthol, lS eugenol toil of elove), euealyptol (oil of eucalyptus and oil of ca~eput), safrol (oil of sassafras~ and methyl salicylate toil of wintergrQen).
In particular embodiment~, the shaving agent CompositQ i~ a member of extrusion-oriented blend of ~polymerie materials that eontains water-soluble and water-insoluble material~, the nature and relative proportions of the water-soluble and water-insoluble polymerie materials being such that the member has adeguate meehanical ~trength, both a~ initially produeed and after a significant amount of the water-soluble material ha~ been leaehed out.
In aecordance with another aspQct, there i8 pro~ided a p~ooe~ for forming a shaped ~having aid compo~ite for a shaving system of the wet ~have type that include~ a matrix of water-in~oluble pol~merie material, an effective amount Or water-leachable shaving aid material, and an effectlve amount of water-insoluble essential oil material, the process including the ateps of forming a blend of the water-insoluble polymerie material and the water-leachable ~having aid material, addinq the water-insoluble essential oil material in particulate to form to the blend at a .
te~peratur- of less than 100-C. to foru a mixture, and ~xtruding the mixturQ in lecs than one minute after the essential oil material i~ added to form thQ shaped shaving a$d composite.
Other features and advantages will be seen as the following description of particular embodiments progressQs, in con~unction with the drawings, in which:
Fig. 1 is a pe~e~-ive view of a razor unit in accordance with the invention;
Fig. 2 is a s~ctional view takon along thQ
lin~ 2-2 of Fig. l; and Fig. 3 is a pe~pe~ivQ ViQW of another razor unit ln accordance with the lnvention.
Th~ shaving unit 10 shown in Figs. 1 and 2 lnclude~ basQ or platform member 12 molded of high ~ impact polys~y~ene that include~ integral coupling groove structurQ 14 for attachment to a razor handle and guard structure 16 that defines a transvQrsely extending forward ~kin engaging ~urfac- 18. On tho upper surfacQ
of platform 12 are disposed steel leading blade 20 having a sharp2ned edge 22, ste~l ~ollowing blade 24 having sharpened edge 26, and aluminum ~pacer member 28 that maintaln~ blade~ 20 and 24 in spaced relation. Cap m~mbor 30 i~ ~olded o~ high impact polystyrenQ and has body portlon 32 that defines skin engaging surface 34 that QxtQnds transversQly between forwardly pro~ecting end wall~ 36 and has a front edge 38 that is disposed r~arwardly o~ blade Qdge 26. Integral rivet portions 40 extend downwardly from transv~rsQly extending body portlon 32 and pas~ through hole~ in blade~ 20 and 24, spacer 28, and platform 12 to secure cap 30, blades 20, 24 and spacQr 28 on platform 12. Adhesively affixed to s~in engaging sur~ace 34 is shaving aid composite 42.
The shaving unit 50 ~hown in Fig. 3 i~ of the type shown ln Jacob~on U.S. Patent 4,586,255 and includes body 52 with front portion 5~ and rear portion 56. Re~iliently secured in body 52 are guard member 58, s ~Q 5~557 ;-leading blade unit 60 and trailing blade unit 62. A shaving aid composite in the form of elongated insert member 64 is frictionally locked in opening 66 of rear portion 56.
The following examples show by way of illustration and not by way of limitation practice of the invention.
Example 1 A blend is formed of about thirty-one percent by weight high impact polystyrene; fifty percent by weight of a water soluble polymer (specifically a mixture of sixty percent by weight Polyox* Coagulant polyethylene oxide five million molecular weight and forty weight percent Polyox* WSRN-750 polyethylene oxide -- 300,000 molecular weight); nine percent by weight of water soluble polyethylene glycol (4,500 molecular weight); and ten percent by weight of menthol. The blend includes color dye and antioxidant additives in minor amounts.
The blend is extruded through a nineteen millimeter diameter screw extruder. The menthol is fed into the mixture in small particulate form (particles of about forty microns or less in size) and is mixed with the other constituents and extruded with a residence time in the extrusion system of less than one minute. The feed zone (input to the barrel) is at a temperature of about 80~C, intermediate barrel temperatures are about 130~C and 160~C and the die is at a temperature of about 180~C. The barrel pressure is about 1,800 psi and the die pressure is about 2,400 psi. An extruded strip member of cross sectional shape indicated in Fig. 3 is formed. Members 64 are sliced from the extruded strip and secured in openings 66 of shaving units 50. The resulting extruded member 64 is sturdy and has an attractive appearance, and the resulting cartridge 50 possesses good overall shaving performance.
Example 2 A blend is formed of about thirty-two percent by weight high impact polystyrene; fifty-two percent by weight of a water soluble * Trade-mark Icd:mls ~o~iSS7 polymer (specifically a mixture of sixty percent by weight Polyox*
Coagulant polyethylene oxide five million molecular weight and forty weight percent Polyox* WSRN-750 polyethylene oxide -- 300,000 molecular weight); nine percent by weight of water soluble polyethylene glycol (4,500 molecular weight); and six percent by weight of menthol. The blend includes color dye and antioxidant additives in minor amounts. The blend is extruded through an extruder. The menthol is fed into the mixture in small particulate form (particles of fifty-one hundred microns in size) and is mixed with the other constituents. The water-cooled feed zone (input to the barrel) is at a temperature of about 17~C, intermediate barrel temperatures are about 120~C and 160~ and the die is at a temperature of about 160~C. The barrel pressure is about 2,700 psi and the die pressure is about 1,900 psi. An extruded strip member of cross sectional shape indicated in Fig. 3 is formed. Members 64 are sliced from the extruded strip and secured in openings 66 of shaving units 50. The resulting extruded member 64 is sturdy and has an attractive appearance, and the resulting cartridge 50 possesses good overall shaving performance.
Example 3 A blend is formed of about thirty-one percent by weight high impact polystyrene; fifty percent by weight of a water soluble polyethylene oxide; nine percent by weight of water soluble polyethylene glycol (4,500 molecular weight); and ten percent by weight of menthol. The blend is extruded through an extruder. The menthol is fed into the mixture in small particulate form and is mixed with the other constituents and extruded with a residence time in the extrusion system of less than one minute. The feed zone (input to the barrel) is at a temperature of about 120~C, the barrel * Trade-mark k~
~ ~ 5 3 5 ~ 7 temperature is about 160~C. and the die is at a temperature of about 160~C. An extruded strip member of cross sectional shape indicated in Fig. 3 is formed. Members 64 are sliced from the extruded strip and secured in openings 66 of shaving units 50.
The resulting extruded member 64 is sturdy and has an attractive appearance, and the resulting cartridge 50 possesses good overall shaving performance.
Ex~mple ~
A blend is formed of about twenty-seven percent by weight high impact polystyrene; forty-five percent by weight of water-soluble polyethylene oxide: eight percent by weight of water-soluble polyethylene glycol (4,500 molecular weight); and twenty percent by weight of menthol. The blend is extruded through an extruder, and the menthol is fed into the mixture in small particulate form and is mixed with the other constituents and extruded with a residence time in the extrusion system of less than one minute. The feed zone (input to the barrel) is at a temperature of about 80~C., the barrel temperature is about 160~C. and the die is at a temperature of about 180~C.
An extruded strip member of cross sectional shape indicated in Fig. 3 is formed. Members 64 are sliced from the extruded strip and secured in openings 66 of shaving units 50. The resulting extruded member 64 is s~urdy and has an attractive appearance, and the resulting cartridge 50 possesses good overall shaving performance.
The water-insoluble menthol is dispersed from the cartridge insert with the polyethylene oxide lubricant and tends to reduce the level of irritation produced upon shaving and to improve the overall comfort and quality of the shave.
The resulting quantity of the menthol in insert 64 is about three percent, a portion of which is associated with the polystyrene and about twenty percent of the original quantity ~s~
- ~a~5~7 of the menthol in the insert member remains with the polystyrene residue after the polyethylene oxide and other water-extractable materials have been completely leached from insert 64.
The system delivers about fifteen nanograms of menthol per square centimetre of the skin and about two-thirds of the delivered menthol is substantive. Inserts 64 containing about three percent menthol were shown to deliver about five mi~,o~Lams of menthol to the face during shaving (as determined by gas chromatography/mass spectrometry, analysis of alcohol extracts of the skin surface). After rinsing, about two-thirds of the delivered menthol; i.e., 3.3 micrograms, remained on the skin.
~s,~
Claims (15)
1. A shaving system of the wet shave type comprising a blade member, and structure defining an external skin-engaging portion adjacent a shaving edge of said blade member, said skin-engaging portion including a shaving aid composite that includes 20-40% of a water-insoluble polymeric matrix material, 40-75% of a water-leachable shaving aid material, and 2-20% of a water-insoluble essential oil material, said water-insoluble essential oil material being delivered from said shaving aid composite concurrently with the delivery of said water-leachable shaving aid material during shaving.
2. The shaving system of claim 1, wherein said essential oil is selected from the group consisting of menthol, eugenol, eucalyptol, safrol and methyl salicylate.
3. The shaving system of claim 1, wherein said shaving aid composite further includes a release enhancing agent selected from the group consisting of polyethylene glycol, methoxypolyethylene glycol, methylcellulose, and carboxypolymethylene.
4. The shaving aid system of claim 3, wherein the molecular weight of said release enhancing agent is less than one percent of the molecular weight of said shaving aid material.
5. The shaving system of claim 1, wherein said shaving aid composite is of extrusion-oriented material.
6. The shaving system of claim 1, wherein said polymeric matrix material is selected from the group consisting of polyethylene, polypropylene, polystyrene, and polyacetyl; and said shaving aid material is selected from the group consisting of polyethylene oxide, polyvinyl pyrrolidone, polyacrylamide, hydroxypropyl cellulose, polyvinyl imidazoline, polyhydroxyethylmethacrylate, silicone polymers, sucrose stearate, vitamin E; panthenol, and aloe.
7. The shaving system of claim 3, wherein said essential oil is selected from the group consisting of menthol, eugenol, eucalyptol, safrol and methyl salicylate.
8. The shaving system of claim 7, wherein said shaving aid composite is of extrusion-oriented material.
9. The shaving system of claim 8, wherein said polymeric matrix material is selected from the group consisting of polyethylene, polypropylene, polystyrene, and polyacetyl; and said shaving aid material is selected from the group consisting of polyethylene oxide, polyvinyl pyrrolidone, polyacrylamide, hydroxypropyl cellulose, polyvinyl imidazoline, polyhydroxyethylmethacrylate, silicone polymers, sucrose stearate, vitamin E, panthenol, and aloe.
10. A process for forming a shaped shaving aid composite for a shaving system of the wet shave type that includes 20-40% of a water-insoluble polymeric matrix material, 40-75% of a water-leachable shaving aid material, and 2-20% of a water-insoluble essential oil material, comprising the steps of forming a blend of said water-insoluble polymeric material and said water-leachable shaving aid material, adding said water-insoluble essential oil material in particulate form to said blend at a temperature of less than 100°C to form a mixture and extruding said mixture to form said shaped shaving aid composite.
11. The process of claim 10, wherein said essential oil material is menthol in particles of less than one hundred micron size.
12. The process of claim 10, wherein said essential oil material is added to said blend at a temperature of less than about 80~C.
13. The process of claim 10, wherein said essential oil material is present in said shaving aid composite in an amount less than six percent by weight.
14. The process of claim 10 wherein said essential oil material is selected from the group consisting of menthol, eugenol, eucalyptol, safrol and methyl salicylate.
15. The process of claim 14 wherein said essential oil material is added to said blend as particles of less than one hundred micron size at a temperature of less than 80~C, and said essential oil material is present in said shaving aid composite in an amount of about three percent by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2053557 CA2053557C (en) | 1991-10-16 | 1991-10-16 | Shaving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2053557 CA2053557C (en) | 1991-10-16 | 1991-10-16 | Shaving system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2053557A1 CA2053557A1 (en) | 1993-04-17 |
| CA2053557C true CA2053557C (en) | 1998-01-06 |
Family
ID=4148578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2053557 Expired - Fee Related CA2053557C (en) | 1991-10-16 | 1991-10-16 | Shaving system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2053557C (en) |
-
1991
- 1991-10-16 CA CA 2053557 patent/CA2053557C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2053557A1 (en) | 1993-04-17 |
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