EP0348627B1 - Rasiereinheit mit eingearbeitetem Schmiermittel - Google Patents
Rasiereinheit mit eingearbeitetem Schmiermittel Download PDFInfo
- Publication number
- EP0348627B1 EP0348627B1 EP89107307A EP89107307A EP0348627B1 EP 0348627 B1 EP0348627 B1 EP 0348627B1 EP 89107307 A EP89107307 A EP 89107307A EP 89107307 A EP89107307 A EP 89107307A EP 0348627 B1 EP0348627 B1 EP 0348627B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaving
- weight
- shaving unit
- platform
- cap
- 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 - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/40—Details or accessories
- B26B21/44—Means integral with, or attached to, the razor for storing shaving-cream, styptic, or the like
- B26B21/443—Lubricating strips attached to the razor head
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/40—Details or accessories
- B26B21/44—Means integral with, or attached to, the razor for storing shaving-cream, styptic, or the like
Definitions
- This invention relates to shaving units that provide a comfortable shaving whatever the holding position and angle is, as a result of supplying a shaving composition which is water soluble or soluble in shaving foam or soap with the friction of cap and platform sections to the skin.
- the complete shaving unit or its cartridge is disposable and it comprises one or more razor blades.
- the whole shaving unit as well as the cartridge section that is engaged with the handle are disposable and made of water insoluble polymer polystyrene based material.
- the polymer blend includes a water soluble polymeric material in an amount of up to 50% by weight selected from the class consisting of polyethylene oxide, polyvinyl pyrrolidone, polyacrylamide, hydroxypropyl cellulose, polyvinyl imidazoline and polyhydroxyethylmethacrylate and a water insoluble polymer in an amount of at least 50% by weight selected from the class consisting of polyethylene, polypropylene, polystyrene and polyacetale.
- the member consisting of water soluble polymer that is present in the shaving units manufactured in accordance with this technique is placed on the cap that is above the razor blade. During shaving as a result of the frictional drag of the razor across the skin the water soluble polymer present in the member is leached and provides a smooth surface.
- the general feature in the prior art shaving units is to manufacture the shaving aid member which consists of shaving aid material separately, placing on top of the blade in form of strip; the blend includes 50% (preferably 80%) water soluble polymer and 50% (preferably 20%) water insoluble polymer.
- U.S. Patent No. 4, 170, 821 discloses a disposable razor cartridge having a shaving aid containing lubricant as micro-encapsulated silicone oil, polyethylene oxide in the range of molecular weight between 100 000 - 6 000 000, non-ionic polyacrylamide, natural polysaccaride from plants such as guar gum, hair softening agent, cleaning agent, medicinal agent and blood coagulant.
- This patent does not claim any percentages for mixing of water soluble and insoluble materials in the mixture. In low percentages of water soluble polymer which is polyethylene oxide, the slippery feature will be hardly felt during shaving.
- the mixture contains non-ionic polymer polyacrylamide which is not a polyethylene oxide plasticizer as a non-ionic polymer.
- non-ionic polymer polyacrylamide which is not a polyethylene oxide plasticizer as a non-ionic polymer.
- a mixing process is not mentioned therefore homogeneous distribution of water soluble and insoluble polymer in the shaving unit during injection moulding process may not be obtained.
- United Kingdom Patent No. 2,183,523 discloses a razor cartridge of which one or more of the skin contacting surfaces is/are composed of a self lubricating plastics material comprising a moulded thermoplastics polymer containing a water insoluble migratable slip or lubricating agent, preferably free silicone oil (up to 5 percent by weight) or polytetrafluoroethylene (up to 20 percent by weight).
- a self lubricating plastics material comprising a moulded thermoplastics polymer containing a water insoluble migratable slip or lubricating agent, preferably free silicone oil (up to 5 percent by weight) or polytetrafluoroethylene (up to 20 percent by weight).
- a shaving unit described in the United Kingdom Patent No. 2,024,082 comprises the guard and cap surfaces formed wholly in part of a moulded mixture of at least one hydrophobic material and at least one water leachable hydrophilic polymeric material.
- the mixture of polymeric materials comprises 85 to 5% by weight of the hydrophobic material(s) and 15 to 95% by weight of the hydrophilic material(s), or from 50 to 60% by weight of the hydrophobic material(s) and 50 to 40% by weight of hydrophilic material(s).
- the hydrophobic polymeric materials described in the patent are polystyrene, polyethylene, polypropylene or polyacetal.
- the hydrophilic polymeric materials are polyethylene oxide, polyvinyl pyrrolidone, polyacrylamide, hydroxypropyl cellulose, polyvinyl imidazoline or polyhydroxyethyl methacrylate. These hydrophilic materials do not contain polyethylene glycol as being plasticizer of polyethylene oxide and flow modifier.
- FR-A-2229389 discloses the use of polyethylene glycol in shaving aids (e.g. shaving creams).
- the objective of this invention is to provide comfortable and easy shaving by making the surface smooth during shaving before the friction of the blade with the skin and keeping it smooth afterwards.
- This smoothness is defined as coating the whisker or hair by gel type of water soluble polymer so as not to feel cutting action during shaving.
- This objective of the invention can be reached by the manufacture of platform and cap portions of the shaving units that can be totally or partly disposable with the addition of polyethylene glycol that makes the dissolving easier and that is surface active during the injection process into the mixture prepared with water soluble and insoluble polymers because it is a plasticizer for polyethylene oxide and non-ionic polymer.
- Subject matter of the present invention is a disposable shaving unit according to claim 1.
- a further subject matter of the present invention is a method of manufacturing a shaving unit according to the present invention.
- FIGURE 1 is a front view of the disposable shaving unit.
- FIGURE 2 is a side view of the disposable shaving unit.
- FIGURE 3 is a bottom view of the platform section of the shaving unit
- FIGURE 4 is the top view of the platform of the shaving unit
- FIGURE 5 is the bottom view of the cap section of the shaving unit
- FIGURE 6 is a top view of the cap section of the shaving unit.
- FIGURE 7 is a view of the cartidge of the shaving units that can be attached to the handle.
- This invention discloses an improved technique that uses polyethylene glycol in addition to the water soluble and insoluble polymers in the blend used in the manufacture of platform 5 and cap 3 as being plasticizer of polyethylene oxide and flow modifier for the injection moulding process.
- composition of the blend that forms the cap 3 and platform structure may be summarized as follows:
- Water soluble polymer is prepared by mixing 80% by weight WRPA 5769® and 20% by weight WSR 301®. This water soluble polymer is mixed with polyethylene glycol with the weight percentage ratio 7:1. Water insoluble polymer which is polystyrene is humidified with a plasticizer dibutyl phatalat. 50-100 ml of dibutyl phatalat is used per 100 kilogram of polystyrene as premix. Then 60% by weight of humidified polystyrene is mixed with 40% by weight of water soluble polymers. As the final mixture for injection moulding process, the weight percentages of the polymers become 60% polystyrene, 35% water soluble polymer and 5% polyethylene glycol.
- the cap 3 and platform 5 of the shaving unit is manufactured by injection moulding process at 190-200°C temperature, under 5 to 10 MPa (50-100 bar) injection pressure with screws that have a diameter of 35-45 mm.
- the cap 3 and platform 5 that were taken out of the mould as hard pieces at 30-40°C would become the main shaving part of the shaving unit after inserting the razor blade(s) 4 between them and riveting the pins 6 on the cap 3 by cold riveting process.
- polyethylene glycol is not compatible with polystyrene and being plasticizer for polyethylene oxide, after the injection moulding process it tends to take place at the surface of polystyrene component with some of the polyethylene oxide. This feature makes the water soluble polymer dissolve easier and create a thin gel layer on the skin to provide a comfortable and smooth shaving.
- the protection bar 7 in front of the platform 5 made of the above described blend is moved along the skin just before the razor blade(s) 1 touch(es) the skin.
- the cap 3 made of the same blend that is disposed on the blade(s) 4 continues to contact the skin and it makes the skin smooth that may be required for blade(s)'s second pass from the same spot by dissolving the platform 5 as well as the protection bar 7.
- all surfaces of the shaving unit will dissolve in water as a result of friction and provides the skin with a continuous smoothness and a very comfortable shaving.
- section 2 on the platform 5 of the shaving unit that provides the engagement with the handle 1 consists of water soluble polymer blend material and It contacts with water since it is not exposed to water there would be no slippery surface on the handle 1. The same applies to the handle because the water soluble polymer and polyethylene glycol is not present in the blend of the handle 1.
- the forming of the smoothness on the skin during shaving is first started with the contact of the platform 5 with skin and continues with the contact of the cap the parts that are made of the said blend may continue to contact with the skin whatever the handling position and angle may be so it provides the user with the opportunity to enjoy a very comfortable shaving.
- the compounds of the blend of which platform and cap is consisted of the lowest and highest limits of weight percentages and the characteristics of the blend will be defined below.
- the blend When the blend is composed of 50-90% water soluble polymer, 9-40% water soluble polymer and 1-10% polyethylene glycol, it provides the manufacture of the platform 5 and cap 3 for a comfortable shaving.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cosmetics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Lubricants (AREA)
- Reverberation, Karaoke And Other Acoustics (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Claims (10)
Herstellung einer Mischung eines wasserunlöslichen Polymers in einer Menge von 50 bis 90 Gew.-%, eines wasserlöslichen Polymers in einer Menge von 9 bis 40 Gew.-% und Polyethylenglykol in einer Menge von 1 bis 10 Gew.-%;
Spritzgießen der Plattform (5) und der Kappe (3) innerhalb eines Temperaturbereichs von 190 bis 200°C unter Verwendung eines Einspritzdruckes von 50 bis 10 Mpa (50 bis 100 bar) und von Spritzgießschnecken mit einem Durchmesser von 25 bis 45 mm;
Entfernen der Plattform und der Kappe aus der Spritzgußform bei einem Temperaturbereich von 30 bis 40°C; und
Einbrigen einer Rasierklinge (4) zwischen die Plattform (5) und die Kappe (3).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89107307T ATE79069T1 (de) | 1988-05-02 | 1989-04-22 | Rasiereinheit mit eingearbeitetem schmiermittel. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR305/88A TR22895A (tr) | 1988-05-02 | 1988-05-02 | Platform ve bashk kisimlarinin tamami yardimci tiras malzemesi katkisiyla ueretilen,sulu ortamda kaygan zemin olusturan,bir veya cok bicakh tiras ueniteleri |
TR22895/88 | 1988-05-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0348627A1 EP0348627A1 (de) | 1990-01-03 |
EP0348627B1 true EP0348627B1 (de) | 1992-08-05 |
Family
ID=21620515
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89107307A Expired - Lifetime EP0348627B1 (de) | 1988-05-02 | 1989-04-22 | Rasiereinheit mit eingearbeitetem Schmiermittel |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0348627B1 (de) |
AT (1) | ATE79069T1 (de) |
DE (2) | DE68902369T2 (de) |
ES (1) | ES2013225T3 (de) |
GR (2) | GR900300074T1 (de) |
IL (1) | IL90114A (de) |
TR (1) | TR22895A (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6839968B2 (en) | 2002-05-09 | 2005-01-11 | The Gillette Company | Shaving systems |
US6852262B2 (en) | 2002-05-09 | 2005-02-08 | The Gillette Company | Insert molding razor cartridges |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2046353C (en) * | 1990-08-07 | 1999-11-16 | Evan N. Chen | One-piece flexible razor head |
US5113585A (en) * | 1990-09-28 | 1992-05-19 | The Gillette Company | Shaving system |
US5646190A (en) * | 1991-03-01 | 1997-07-08 | Warner-Lambert Company | Acne treating-wound healing compositions and methods for preparing and using same |
US5658957A (en) * | 1991-03-01 | 1997-08-19 | Warner Lambert Company | Immunostimulating wound healing compositions and method for preparing and using same |
US5602183A (en) * | 1991-03-01 | 1997-02-11 | Warner-Lambert Company | Dermatological wound healing compositions and methods for preparing and using same |
US5641814A (en) * | 1991-03-01 | 1997-06-24 | Warner-Lambert Company | Antikeratolytic-wound healing compositions and methods for preparing and using same |
US5674912A (en) * | 1991-03-01 | 1997-10-07 | Warner-Lambert Company | Sunscreen-wound healing compositions and methods for preparing and using same |
US5863938A (en) * | 1991-03-01 | 1999-01-26 | Warner Lambert Company | Antibacterial-wound healing compositions and methods for preparing and using same |
US5648380A (en) * | 1991-03-01 | 1997-07-15 | Warner-Lambert Company | Anti-inflammatory wound healing compositions and methods for preparing and using same |
US5633285A (en) * | 1991-03-01 | 1997-05-27 | Warner-Lambert Company | Cytoprotective wound healing compositions and methods for preparing and using same |
US5663208A (en) * | 1991-03-01 | 1997-09-02 | Warner-Lambert Company | Antifungal wound healing compositions and methods for preparing and using same |
US5692302A (en) * | 1991-03-01 | 1997-12-02 | Warner-Lambert Company | Razor cartridges comprising wound healing compositions and methods for preparing and using same |
US5652274A (en) * | 1991-03-01 | 1997-07-29 | Martin; Alain | Therapeutic-wound healing compositions and methods for preparing and using same |
US5658956A (en) * | 1991-03-01 | 1997-08-19 | Warner-Lambert Company | Bioadhesive-wound healing compositions and methods for preparing and using same |
US5856364A (en) * | 1991-03-01 | 1999-01-05 | Warner Lambert Company | Therapeutic antiviral-wound healing compositions and methods for preparing and using same |
US5614561A (en) * | 1991-03-01 | 1997-03-25 | Warner-Lambert Company | Antihistamine-wound healing compositions and methods for preparing and using same |
EP0625173B1 (de) * | 1992-02-06 | 2004-09-29 | Warner-Lambert Company | Rasiermittel für ein nassrasierapparat |
US5454164A (en) * | 1994-03-17 | 1995-10-03 | The Gillette Company | Wet shaving system with a lubricating device |
US6594904B1 (en) | 1994-07-01 | 2003-07-22 | The Gillette Company | Shaving system |
US6944952B1 (en) | 1994-07-01 | 2005-09-20 | The Gillette Company | Shaving system |
US6295733B1 (en) | 1994-08-03 | 2001-10-02 | Warner-Lambert Company | Changeable color shaving aid |
JP3940166B2 (ja) * | 1994-09-30 | 2007-07-04 | エバレデイ バツテリ カンパニー インコーポレーテツド | 創傷を治癒する組成物を含むレザーカートリッジ |
US6298558B1 (en) | 1994-10-31 | 2001-10-09 | The Gillette Company | Skin engaging member |
US5713131A (en) * | 1995-06-30 | 1998-02-03 | The Gillette Company | Shaving aid composite with a non-volatile cooling agent |
US5711076A (en) * | 1996-03-27 | 1998-01-27 | The Gillette Company | Shaving system with improved guard structure |
US5956848A (en) | 1997-02-27 | 1999-09-28 | The Gillette Company | Shaving system |
US6115902A (en) | 1998-02-13 | 2000-09-12 | Bic Corporation | Method of manufacturing a razor |
ES2214966B2 (es) * | 2003-03-05 | 2006-04-16 | Contadores De Agua De Zaragoza, S.A | Equipo autonomo para gestion y control de agua para riego. |
CA2766318C (en) * | 2009-06-26 | 2016-10-25 | Sumitomo Seika Chemicals Co., Ltd. | Resin composition whose lubricity under wet conditions is maintained |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2024082A (en) * | 1978-05-31 | 1980-01-09 | Gillette Co | Safety razors |
US4624051A (en) * | 1984-12-07 | 1986-11-25 | The Gillette Company | Shaving unit |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2229389A1 (en) * | 1973-05-14 | 1974-12-13 | Wakeman L | Multipurpose toilet cream contg. anionic detergent - with fillers, polishers and other additives |
US4170821A (en) * | 1977-12-02 | 1979-10-16 | Warner-Lambert Company | Razor cartridges |
GB8525330D0 (en) * | 1985-10-15 | 1985-11-20 | Wilkinson Sword Ltd | Razors & cartridges |
-
1988
- 1988-05-02 TR TR305/88A patent/TR22895A/xx unknown
-
1989
- 1989-04-22 AT AT89107307T patent/ATE79069T1/de not_active IP Right Cessation
- 1989-04-22 ES ES198989107307T patent/ES2013225T3/es not_active Expired - Lifetime
- 1989-04-22 DE DE8989107307T patent/DE68902369T2/de not_active Expired - Lifetime
- 1989-04-22 EP EP89107307A patent/EP0348627B1/de not_active Expired - Lifetime
- 1989-04-22 DE DE198989107307T patent/DE348627T1/de active Pending
- 1989-04-28 IL IL90114A patent/IL90114A/xx unknown
-
1991
- 1991-07-31 GR GR90300074T patent/GR900300074T1/el unknown
-
1992
- 1992-09-25 GR GR920402135T patent/GR3005810T3/el unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2024082A (en) * | 1978-05-31 | 1980-01-09 | Gillette Co | Safety razors |
US4624051A (en) * | 1984-12-07 | 1986-11-25 | The Gillette Company | Shaving unit |
Non-Patent Citations (1)
Title |
---|
Kirk-Othmer, Encyclopedia of Chemical Technology, 3rd Edition, volume 11, pages 933,935,953 and volume 18, page 113. * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6839968B2 (en) | 2002-05-09 | 2005-01-11 | The Gillette Company | Shaving systems |
US6852262B2 (en) | 2002-05-09 | 2005-02-08 | The Gillette Company | Insert molding razor cartridges |
Also Published As
Publication number | Publication date |
---|---|
EP0348627A1 (de) | 1990-01-03 |
ES2013225T3 (es) | 1993-04-01 |
DE68902369T2 (de) | 1993-01-07 |
GR3005810T3 (de) | 1993-06-07 |
ATE79069T1 (de) | 1992-08-15 |
GR900300074T1 (en) | 1991-07-31 |
IL90114A0 (en) | 1989-12-15 |
DE348627T1 (de) | 1990-05-23 |
DE68902369D1 (de) | 1992-09-10 |
IL90114A (en) | 1992-01-15 |
TR22895A (tr) | 1988-10-11 |
ES2013225A4 (es) | 1990-05-01 |
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