CA1097992A - Amorphous alloy razor blade - Google Patents
Amorphous alloy razor bladeInfo
- Publication number
- CA1097992A CA1097992A CA286,584A CA286584A CA1097992A CA 1097992 A CA1097992 A CA 1097992A CA 286584 A CA286584 A CA 286584A CA 1097992 A CA1097992 A CA 1097992A
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- Prior art keywords
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- weight
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- blade
- amorphous alloy
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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
- B26B21/54—Razor-blades
- B26B21/58—Razor-blades characterised by the material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/02—Amorphous alloys with iron as the major constituent
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Physical Vapour Deposition (AREA)
- Knives (AREA)
Abstract
Docket No. P-2018 AMORPHOUS ALLOY RAZOR BLADE
ABSTRACT OF THE DISCLOSURE
A razor blade made from an amorphous alloy. The razor blade has formed on its cutting edge an adherent coating of solid fluorocarbon polymer.
ABSTRACT OF THE DISCLOSURE
A razor blade made from an amorphous alloy. The razor blade has formed on its cutting edge an adherent coating of solid fluorocarbon polymer.
Description
z BACKGROUND OF THE INVENTION
1. Ficld of the Inve_tion The present invention relates to a cutting instrument formed from an amorphous alloy. More particularly! the present invention relates to a cutting instrument, such as a razor blade, having an amorphous alloy comp-osition which is suitable for applying a solid fluorocarbon polymer at elevated heating temperatures.
1. Ficld of the Inve_tion The present invention relates to a cutting instrument formed from an amorphous alloy. More particularly! the present invention relates to a cutting instrument, such as a razor blade, having an amorphous alloy comp-osition which is suitable for applying a solid fluorocarbon polymer at elevated heating temperatures.
2. Description of the Prior Art Amorphous alloys are known in the art. One such alloy is available from Allied Chemical Corporation, Morristown, New Jersey, under the name METGLAS, a registered trademark of Allied Chemical Corporation. METGLAS
alloys consist of base metals iron and nickel, as well as chromium, cobalt and molybdenum combined with various metalloids (boron, carbon, silicon, pllosphorus, etc.). The basic fabrication process, although varying in de-tail with the base-metalloid combination, consists of extremely rapid quenching from the liquid state. In this way the random atomic structure o~ the liquid phase is retained in the solid state at ordinary temperatures.
Thus, unlike conventional metallic alloys, METGLAS materials are not aggreg-ates of small crystals and therefore do not have the "grain boundaries"
that tend to weaken conventional alloys and make them susceptible to chem-ical attack. On the other hand, and unlike ordinary glasses, the METGLAS
alloys are not brittle.
It is also well known in the art to coat safety razor blade cutting edges with a solid fluorocarbon polymer. During the coating process heat in the order of 626 F. - 700 F. is applied for about 8 to 30 minutes ~time being varied inversely proportional ;
to the temperature) to melt the coating. Examples of processes using such temperatures when coating safety razor blade cutting edges with a solid fluorocarbon polymer are disclosed in U.S. Patent Nos. 3,071,856 and 3,518,110.
S MMARY OF THE INVENTION
The applicants have determined that most nickel-iron base amorphous alloys having a high nickel content become brittle when baked at elevated temperatures in the order of 650 F. to 675~ F. as used in the above-described solid 1uorocarbon coating process. It is theorized that the brittle property is caused by amorphous alloy beginning to crystallize.
IO In accordance with one aspect of the present invention there is prov-ided a razor blade comprising: at least one strip of an amorphous alloy comprising 60 to 70 percent by weight of iron, 2 to 10 percent by weight nickel, 20 to 30 percent by weight of at least one metal selected from the group consisting of chromium, cobalt, molybdenum and tungsten, 2 to 3 percent by weight of at least one metalloid, at least one cutting edge formed on said amorpllous alloy strip, and an adherent coating on at least said cutting edge~
said coating comprising a solid fluorocarbon polymer compound of a high mol-ecular weight polytetrafluoroethylene dispersed on a base coating of low mol-ecular weight polytetrafluoroethylene, said blade and coating having been subjected to a temperature greater than approximately 626 ~. for more than npproximately 8 minutes and less than approximately 30 minutes.
The alloy preferably includes a plurality of metalloids selected from the group consisting of phosphorus~ boron, carbon, aluminum, sulfur, silicon, gallium, germanium, arseni.c, selenium, and tellurium, of which the first six elements are preferred, particularly the first three. Preferred alloys, furthermore, are those containing 10 to 20 percent by weight o:E chromium and molybdenum, or 10 to 20 percent by weight of chromium or molybdenum, or 10 to 20 percent by weight of chromium.
In another aspect of the invention, applicants have determined that a nickel-iron base amorphous alloy of high nickel and low iron content having t~
a relatively high cobalt content may be subjected to elevated coating temp-eratures without embrittlement. In accordance with this aspect of the pres-ent invcntion, there is provided a razor blade comprising: a strip of an amorphous alloy comprising approximately 5.4 percent by weight of iron, approximately 51.3 percent by weight of nickel, approximately 10.1 percent by weight of chromium, approximately 22.9 percent by weight of cobalt, approximately 7.5 percent by weight of molybdenum, and 2.8 percent by weight of boron, a cutting edge formed along a margin of said amorphous alloy strip, and an adherent coating on said cutting edge, said coating comprising a ll~ solid 1uorocarbon polymer composed of a high molecular weight polytetra-fluoroetllylene dispersed on a base coating of low molecular weight poly-tetrafluoroethylene, said blade and coating having been subjected to a temp-erature greater than approximately 626 F. and less than approximately 700 F.
for more than approximately 8 minutes and less than approximately 30 minutes.
DESCRIPTION OF SPECIFIC EMBODIMENTS
As noted above, the cutting edges of safety razor blades are generally coated with a solid fluorocarbon polymer normally comprising a dispersion of polytetrafluoroethylene. United States Patent Nos. 3,~71,856 and 3,518,110 disclose the nature and purpose of such coatings and the processes by which they are placed on the cutting edges. United States Patent No. 3,518,110, in Colunms 4, 5 and 6, Examples 1 through 10, demonstrates that temperatures ~etween approximately 626 F. and 698 F. may be successfully employed to acllieve useful coatings of polytetrafluoroethylene when the blades are sub-jected to such temperatures for appropriate periods of time. Generally the prior art shows that the achieving of a temperature above the melting point of the polymer for sufficient time so as to achieve a uniform coating of the edge produces a useful blade edge coating.
The following example provides for coating various amorphous alloy blade cutting edges with a high molecular weight polytetrafluoroethylene dis-persed on a base coating of a low molecular weight polytetrafluoroethylene.
~79~2 Examp]e ; A dispersion of fluorocarbon telomer VYDAX 1000, a registered trade-mark of DuPont Corporation, havi.ng a molecular weight of approxima~ely 20,000 is diluted by mixing with trichlorotrifluoethanc to obtain a solids level of 7.5 percent by weight. Nine parts of this mixture is then - -4a-, subsequently dlluted with 24 parts tertiarybutyl-alcohol and 5 parts tetrachlorodifluoroethane~ The mixture .is then placed in an a.ir spray recirculat.ing system pressure vessel us.ing l.ine pressure of 2 to 8 psi and a fluid heater to prevent freez.ing.
The blades are sprayed uslng a gaseous atom.izing pressure of 20-40 ps.i while the blades are transversed in front of the spray-.ing guns at a rate of 3-25 feet per minute.
Having successfully applied the base telomer, the blades are preheated via a holding oven/ induction heater, or infra-red heater until the temperatures of the blades are stabilizedbetween 140 F. and 200 F. As the blades attain this temperature, they are then processed through a second spray system containing a non-recirculating but pressurized vessel containing a tank pressure of 1-10 psi and an atomizing pressure from 3-40 psi which is spraying a d.iluted mixture of polytetrafluoroethylene particles, containing one part DuPont's Teflon PTFE Product Type 30 wlth 50-70 percent solids by weight and 9 parts of deionized water while the blades transverse at a rate of about 3-25 feet per minute.
Having appl.ied both coatings to the desired degree, the blade is placed in an atmosphere controlled furnace. The atmosphere may be a reducing atmosphere such as dissociated ammonia or an .inert atmosphere such as nitrogen gas and the blade is raised .in temperatures 650 F to 675 F. as rapidly as poss.ible above the s.intering temperature of both materials, and held for a period of ~5 8-30 minutes at that temperature followed by a subsequent rap:id cool.ing cycle.
Samples of amorphous alloys produced by Allied Chemical Corporation under the trade name METGLAS were subjected to ele-vated temperatures typically used when coating blade edges with a ~'7~1~2 solid fluorocarbon polymer. The cornpositions of the samples are given in Table I.
T A B L E
Element in Weight Sample No.
Percent 1 _ 2 3 4 5 Iron 69.4 64.165.1 35.7 5.4 Nickel 1.9 5.0 9.6 41.4 51.3 Chromium 4.0 5.017.1 15.4 10.1 Cobalt 2.2 3.2 6.2 0 22.9 Copper 0 0 0 0 0 Molybdenu~ 20.1 20.0 0 0 7.5 Phosphorous 0 0 0 6.5 0 Silicon 0.28 0.570.13 0 0 Boron 2.2 2.1 1.9 loO 2.8 Samples 1 through 4 were each divided into six strips of at least six inches in length. The thickness and width dimensions or the sample strips are given in inches in parentheses in left-hand "Sample" column of I'able II. Five of the strips of each sample were subjected to respectively di~ferent temperatures for 30 minutes as shown in Table II. Sample 5 was subjected only to the 700 F. test, previous experience having shown such temperature to be the most critical to performance of the material and its adaptability to the fabrication of razor blades.
The six strips of Samples 1 through 4 and test Sample 5 were then subjected to a break test in which a loop of each portion of 0.5 to 0.75 inch is inserted between two flat and parallel plates of a table micrometer, and compressed until the loop breaks.
The distances, in thousandths of an inch, separating the plates at the time of breakage for the portions are recorded in Table II.
However, it will be noted from Table II that Samples 1, 2, 3 and 5 as received, Sample 3 subjected to 600 F. and Sample 5 (Mirror ; surface out only) subjected to 700 F. for 30 minutes were suffi-ciently ductile so as to avoid breakage during the blending test.
:
.
.his failure to break indicates the materials as being in a highly amorphous condition which is desirable to the fabrication of cutting edges.
It is noted that the strips of Metglas tested have one highly reflectant surface and an opposing relatively dull surface.
As shown in Table II, a portion of each strip was subjected to the break test with the reflectant surface facing outwardly (MO), and another portion of each strip was tested with the reflectant surface facing inwardly (MI). The designation TB (too brit-tle) indicates fracture of the material prior to achieving a measurable bend dimension within the test fixture. This is assumed as indicating the material has crystallized to a point where its desirable characteristics have sufficiently diminished due to time temperature conditions as to obviate its applicability to razor blade fabrication in accordance with the processes described herein.
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The data of Table II shows that the four strips of Sample 4 when respect.ively heated for 30 m.inutes at 650 F., 700 F., 750 F and 930 Fo were so brlttle that they could not be looped in preparation for the break test. However, the strips of Samples 1 and 2 d,id not become two brittle for the test unt,il heated at 700 F., and the str,ips of Sample 3 d.id not become too brittle until 750 F. It is bel.ieved that the brittleness property is caused by the alloys beglnn.ing to crystall,ize.
Sample 5 did not become too br.ittle when subjected to a tempera-ture of 700 F.
The data show that the alloys of Samples 1 and 2 aresuitable for coat.ing w.ith polytetrafluoroethylene employing processes carried on at temperatures up to approximately 650 F.
Subsequent testing has indicated that the temperature range may be extended to above 675 F. without detrimental effect. The alloys of Samples 3 and 5 are shown to be suitable for processes employing temperature ranges up to and exceeding 700 F. w.ithout resultant embrittlement of the material. The break.ing of samples at various bending d.istances shown in the table does not indicate unsuitability for fabrication into razor blades but only the probability that some transition to a semi~crystalline state has occurred.
It was found subsequent to the bend testing that the sample alloys, with the exception of Sample 4, were capable of producing coated raæor blades with acceptable edge sharpness and shaving comfort. It is pointed out that the provision of accept-able shaving comfort and blade performance does not require the two-stage, low molecular weight base coating and subsequent h.igh molecular weight final coating, but may be achieved with a single coating of the Vydax 1000 dlspers:ion subjected to the same i ~
~ ~7~332 temperature ranges. The two coating process merely enhances performance rather than altering the basic characteristicsO
The embodiments of the invention described herein are intended as illustrative of applicants' novel concept and hence S all those variations and modifications which are obvious to one of ordinary skill in the art are considered to be within the scope of the invention.
alloys consist of base metals iron and nickel, as well as chromium, cobalt and molybdenum combined with various metalloids (boron, carbon, silicon, pllosphorus, etc.). The basic fabrication process, although varying in de-tail with the base-metalloid combination, consists of extremely rapid quenching from the liquid state. In this way the random atomic structure o~ the liquid phase is retained in the solid state at ordinary temperatures.
Thus, unlike conventional metallic alloys, METGLAS materials are not aggreg-ates of small crystals and therefore do not have the "grain boundaries"
that tend to weaken conventional alloys and make them susceptible to chem-ical attack. On the other hand, and unlike ordinary glasses, the METGLAS
alloys are not brittle.
It is also well known in the art to coat safety razor blade cutting edges with a solid fluorocarbon polymer. During the coating process heat in the order of 626 F. - 700 F. is applied for about 8 to 30 minutes ~time being varied inversely proportional ;
to the temperature) to melt the coating. Examples of processes using such temperatures when coating safety razor blade cutting edges with a solid fluorocarbon polymer are disclosed in U.S. Patent Nos. 3,071,856 and 3,518,110.
S MMARY OF THE INVENTION
The applicants have determined that most nickel-iron base amorphous alloys having a high nickel content become brittle when baked at elevated temperatures in the order of 650 F. to 675~ F. as used in the above-described solid 1uorocarbon coating process. It is theorized that the brittle property is caused by amorphous alloy beginning to crystallize.
IO In accordance with one aspect of the present invention there is prov-ided a razor blade comprising: at least one strip of an amorphous alloy comprising 60 to 70 percent by weight of iron, 2 to 10 percent by weight nickel, 20 to 30 percent by weight of at least one metal selected from the group consisting of chromium, cobalt, molybdenum and tungsten, 2 to 3 percent by weight of at least one metalloid, at least one cutting edge formed on said amorpllous alloy strip, and an adherent coating on at least said cutting edge~
said coating comprising a solid fluorocarbon polymer compound of a high mol-ecular weight polytetrafluoroethylene dispersed on a base coating of low mol-ecular weight polytetrafluoroethylene, said blade and coating having been subjected to a temperature greater than approximately 626 ~. for more than npproximately 8 minutes and less than approximately 30 minutes.
The alloy preferably includes a plurality of metalloids selected from the group consisting of phosphorus~ boron, carbon, aluminum, sulfur, silicon, gallium, germanium, arseni.c, selenium, and tellurium, of which the first six elements are preferred, particularly the first three. Preferred alloys, furthermore, are those containing 10 to 20 percent by weight o:E chromium and molybdenum, or 10 to 20 percent by weight of chromium or molybdenum, or 10 to 20 percent by weight of chromium.
In another aspect of the invention, applicants have determined that a nickel-iron base amorphous alloy of high nickel and low iron content having t~
a relatively high cobalt content may be subjected to elevated coating temp-eratures without embrittlement. In accordance with this aspect of the pres-ent invcntion, there is provided a razor blade comprising: a strip of an amorphous alloy comprising approximately 5.4 percent by weight of iron, approximately 51.3 percent by weight of nickel, approximately 10.1 percent by weight of chromium, approximately 22.9 percent by weight of cobalt, approximately 7.5 percent by weight of molybdenum, and 2.8 percent by weight of boron, a cutting edge formed along a margin of said amorphous alloy strip, and an adherent coating on said cutting edge, said coating comprising a ll~ solid 1uorocarbon polymer composed of a high molecular weight polytetra-fluoroetllylene dispersed on a base coating of low molecular weight poly-tetrafluoroethylene, said blade and coating having been subjected to a temp-erature greater than approximately 626 F. and less than approximately 700 F.
for more than approximately 8 minutes and less than approximately 30 minutes.
DESCRIPTION OF SPECIFIC EMBODIMENTS
As noted above, the cutting edges of safety razor blades are generally coated with a solid fluorocarbon polymer normally comprising a dispersion of polytetrafluoroethylene. United States Patent Nos. 3,~71,856 and 3,518,110 disclose the nature and purpose of such coatings and the processes by which they are placed on the cutting edges. United States Patent No. 3,518,110, in Colunms 4, 5 and 6, Examples 1 through 10, demonstrates that temperatures ~etween approximately 626 F. and 698 F. may be successfully employed to acllieve useful coatings of polytetrafluoroethylene when the blades are sub-jected to such temperatures for appropriate periods of time. Generally the prior art shows that the achieving of a temperature above the melting point of the polymer for sufficient time so as to achieve a uniform coating of the edge produces a useful blade edge coating.
The following example provides for coating various amorphous alloy blade cutting edges with a high molecular weight polytetrafluoroethylene dis-persed on a base coating of a low molecular weight polytetrafluoroethylene.
~79~2 Examp]e ; A dispersion of fluorocarbon telomer VYDAX 1000, a registered trade-mark of DuPont Corporation, havi.ng a molecular weight of approxima~ely 20,000 is diluted by mixing with trichlorotrifluoethanc to obtain a solids level of 7.5 percent by weight. Nine parts of this mixture is then - -4a-, subsequently dlluted with 24 parts tertiarybutyl-alcohol and 5 parts tetrachlorodifluoroethane~ The mixture .is then placed in an a.ir spray recirculat.ing system pressure vessel us.ing l.ine pressure of 2 to 8 psi and a fluid heater to prevent freez.ing.
The blades are sprayed uslng a gaseous atom.izing pressure of 20-40 ps.i while the blades are transversed in front of the spray-.ing guns at a rate of 3-25 feet per minute.
Having successfully applied the base telomer, the blades are preheated via a holding oven/ induction heater, or infra-red heater until the temperatures of the blades are stabilizedbetween 140 F. and 200 F. As the blades attain this temperature, they are then processed through a second spray system containing a non-recirculating but pressurized vessel containing a tank pressure of 1-10 psi and an atomizing pressure from 3-40 psi which is spraying a d.iluted mixture of polytetrafluoroethylene particles, containing one part DuPont's Teflon PTFE Product Type 30 wlth 50-70 percent solids by weight and 9 parts of deionized water while the blades transverse at a rate of about 3-25 feet per minute.
Having appl.ied both coatings to the desired degree, the blade is placed in an atmosphere controlled furnace. The atmosphere may be a reducing atmosphere such as dissociated ammonia or an .inert atmosphere such as nitrogen gas and the blade is raised .in temperatures 650 F to 675 F. as rapidly as poss.ible above the s.intering temperature of both materials, and held for a period of ~5 8-30 minutes at that temperature followed by a subsequent rap:id cool.ing cycle.
Samples of amorphous alloys produced by Allied Chemical Corporation under the trade name METGLAS were subjected to ele-vated temperatures typically used when coating blade edges with a ~'7~1~2 solid fluorocarbon polymer. The cornpositions of the samples are given in Table I.
T A B L E
Element in Weight Sample No.
Percent 1 _ 2 3 4 5 Iron 69.4 64.165.1 35.7 5.4 Nickel 1.9 5.0 9.6 41.4 51.3 Chromium 4.0 5.017.1 15.4 10.1 Cobalt 2.2 3.2 6.2 0 22.9 Copper 0 0 0 0 0 Molybdenu~ 20.1 20.0 0 0 7.5 Phosphorous 0 0 0 6.5 0 Silicon 0.28 0.570.13 0 0 Boron 2.2 2.1 1.9 loO 2.8 Samples 1 through 4 were each divided into six strips of at least six inches in length. The thickness and width dimensions or the sample strips are given in inches in parentheses in left-hand "Sample" column of I'able II. Five of the strips of each sample were subjected to respectively di~ferent temperatures for 30 minutes as shown in Table II. Sample 5 was subjected only to the 700 F. test, previous experience having shown such temperature to be the most critical to performance of the material and its adaptability to the fabrication of razor blades.
The six strips of Samples 1 through 4 and test Sample 5 were then subjected to a break test in which a loop of each portion of 0.5 to 0.75 inch is inserted between two flat and parallel plates of a table micrometer, and compressed until the loop breaks.
The distances, in thousandths of an inch, separating the plates at the time of breakage for the portions are recorded in Table II.
However, it will be noted from Table II that Samples 1, 2, 3 and 5 as received, Sample 3 subjected to 600 F. and Sample 5 (Mirror ; surface out only) subjected to 700 F. for 30 minutes were suffi-ciently ductile so as to avoid breakage during the blending test.
:
.
.his failure to break indicates the materials as being in a highly amorphous condition which is desirable to the fabrication of cutting edges.
It is noted that the strips of Metglas tested have one highly reflectant surface and an opposing relatively dull surface.
As shown in Table II, a portion of each strip was subjected to the break test with the reflectant surface facing outwardly (MO), and another portion of each strip was tested with the reflectant surface facing inwardly (MI). The designation TB (too brit-tle) indicates fracture of the material prior to achieving a measurable bend dimension within the test fixture. This is assumed as indicating the material has crystallized to a point where its desirable characteristics have sufficiently diminished due to time temperature conditions as to obviate its applicability to razor blade fabrication in accordance with the processes described herein.
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ni o o o o o -.~ O o u~ ooooo ~_ _ _, _ ~_ 11 11 11 11 11 OH u~m m ~ Z
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The data of Table II shows that the four strips of Sample 4 when respect.ively heated for 30 m.inutes at 650 F., 700 F., 750 F and 930 Fo were so brlttle that they could not be looped in preparation for the break test. However, the strips of Samples 1 and 2 d,id not become two brittle for the test unt,il heated at 700 F., and the str,ips of Sample 3 d.id not become too brittle until 750 F. It is bel.ieved that the brittleness property is caused by the alloys beglnn.ing to crystall,ize.
Sample 5 did not become too br.ittle when subjected to a tempera-ture of 700 F.
The data show that the alloys of Samples 1 and 2 aresuitable for coat.ing w.ith polytetrafluoroethylene employing processes carried on at temperatures up to approximately 650 F.
Subsequent testing has indicated that the temperature range may be extended to above 675 F. without detrimental effect. The alloys of Samples 3 and 5 are shown to be suitable for processes employing temperature ranges up to and exceeding 700 F. w.ithout resultant embrittlement of the material. The break.ing of samples at various bending d.istances shown in the table does not indicate unsuitability for fabrication into razor blades but only the probability that some transition to a semi~crystalline state has occurred.
It was found subsequent to the bend testing that the sample alloys, with the exception of Sample 4, were capable of producing coated raæor blades with acceptable edge sharpness and shaving comfort. It is pointed out that the provision of accept-able shaving comfort and blade performance does not require the two-stage, low molecular weight base coating and subsequent h.igh molecular weight final coating, but may be achieved with a single coating of the Vydax 1000 dlspers:ion subjected to the same i ~
~ ~7~332 temperature ranges. The two coating process merely enhances performance rather than altering the basic characteristicsO
The embodiments of the invention described herein are intended as illustrative of applicants' novel concept and hence S all those variations and modifications which are obvious to one of ordinary skill in the art are considered to be within the scope of the invention.
Claims (11)
1. A razor blade comprising:
at least one strip of an amorphous alloy comprising 60 to 70 percent by weight of iron, 2 to 10 percent by weight nickel, 20 to 30 percent by weight of at least one metal selected from the group consisting of chromium, cobalt, molybdenum and tungsten, 2 to 3 percent by weight of at least one metalloid, at least one cutting edge formed on said amorphous alloy strip, and an adherent coating on at least said cutting edge, said coating comprising a solid fluorocarbon polymer compound of a high molecular weight polytetrafluoroethylene dispersed on a base coating of low molecular weight poly-tetrafluoroethylene, said blade and coating having been subjected to a temperature greater than approximately 626° F. for more than approximately 8 minutes and less than approximately 30 minutes.
at least one strip of an amorphous alloy comprising 60 to 70 percent by weight of iron, 2 to 10 percent by weight nickel, 20 to 30 percent by weight of at least one metal selected from the group consisting of chromium, cobalt, molybdenum and tungsten, 2 to 3 percent by weight of at least one metalloid, at least one cutting edge formed on said amorphous alloy strip, and an adherent coating on at least said cutting edge, said coating comprising a solid fluorocarbon polymer compound of a high molecular weight polytetrafluoroethylene dispersed on a base coating of low molecular weight poly-tetrafluoroethylene, said blade and coating having been subjected to a temperature greater than approximately 626° F. for more than approximately 8 minutes and less than approximately 30 minutes.
2. The blade of Claim 1 wherein said polymer is poly-tetrafluoroethylene and is heated to a temperature of approximately 650° F.
3. The blade of Claim 1 wherein said amorphous alloy strip includes a plurality of metalloids selected from the group consisting of phosphorus, boron, carbon, aluminum, sulfur, silicon, gallium, germanium, arsenic, selenium, and tellurium.
4. The blade of Claim 1 wherein said amorphous alloy strip includes a plurality of metalloids selected from the group consisting of phosphorus, boron, carbon, aluminum, sulfur and silicon.
5. The blade of Claim 4 wherein the plurality of metalloids are phosphor-us, boron, and carbon.
6. The blade of Claim 1 wherein said amorphous alloy strip includes 10 to 20 percent by weight of chromium and molybdenum.
7. The blade of Claim l wherein said amorphous alloy strip includes 10 to 20 percent by weight of chromium or molybdenum.
8. The blade of Claim 1 wherein said amorphous alloy includes 10 to 20 percent by weight of chromium.
9. A razor blade comprising: a strip of an amorphous alloy comprising approximately 5.4 percent by weight of iron, approximately 51.3 percent by weight of nickel, approximately 10.1 percent by weight of chromium, approx-imately 22.9 percent by weight of cobalt, approximately 7.5 percent by weight of molybdenum, and 2.8 percent by weight of boron, a cutting edge formed along a margin of said amorphous alloy strip, and an adherent coating on said cut-ting edge, said coating comprising a solid fluorocarbon polymer composed of a high molecular weight polytetrafluoroethylene dispersed on a base coating of low molecular weight polytetrafluoroethylene, said blade and coating having been subjected to a temperature greater than approximately 626° F. and less than approximately 700° F. for more than approximately 8 minutes and less than approximately 30 minutes.
10. The blade of Claim 9 wherein said polymer is polytetrafluoroethylene and the temperature is approximately 650° F.
11. A razor blade comprising:
a strip of an amorphous alloy comprising approximately 65.1 percent by weight of iron, approximately 9.6 percent by weight of nickel, approxi-mately 17.1 percent by weight of chromium, approximately 6.2 percent by weight of cobalt, approximately 0.13 percent by weight of silicon, and approximately 1.9 percent by weight of boron, a cutting edge formed along a margin of said amorphous alloy strip, and an adherent coating on said cutting edge, said coating comprising a solid fluorocarbon polymer composed of a high molecular weight polytetra-fluoroethylene dispersed on a base coating of a low molecular weight poly-tetrafluoroethylene, said blade and coating having been subjected to a temper-ature greater than approximately 626° F. and less than approximately 700° F.
for more than approximately 8 minutes and less than approximately 30 minutes.
a strip of an amorphous alloy comprising approximately 65.1 percent by weight of iron, approximately 9.6 percent by weight of nickel, approxi-mately 17.1 percent by weight of chromium, approximately 6.2 percent by weight of cobalt, approximately 0.13 percent by weight of silicon, and approximately 1.9 percent by weight of boron, a cutting edge formed along a margin of said amorphous alloy strip, and an adherent coating on said cutting edge, said coating comprising a solid fluorocarbon polymer composed of a high molecular weight polytetra-fluoroethylene dispersed on a base coating of a low molecular weight poly-tetrafluoroethylene, said blade and coating having been subjected to a temper-ature greater than approximately 626° F. and less than approximately 700° F.
for more than approximately 8 minutes and less than approximately 30 minutes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US72327776A | 1976-09-15 | 1976-09-15 | |
| US723,277 | 1976-09-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1097992A true CA1097992A (en) | 1981-03-24 |
Family
ID=24905581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA286,584A Expired CA1097992A (en) | 1976-09-15 | 1977-09-13 | Amorphous alloy razor blade |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5335619A (en) |
| CA (1) | CA1097992A (en) |
| DE (1) | DE2730530A1 (en) |
| FR (1) | FR2364745A2 (en) |
| GB (1) | GB1592476A (en) |
| SE (1) | SE7708049L (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2784215A1 (en) * | 2013-03-28 | 2014-10-01 | Voith Patent GmbH | Scraper |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6054858B2 (en) * | 1980-10-09 | 1985-12-02 | 株式会社 東京宝来社 | Short fiber grafted wax pen |
| JPS5818499A (en) * | 1981-07-23 | 1983-02-03 | 株式会社東京宝来社 | Production of base paper of flocking base paper having preserving property |
| JPS5865086A (en) * | 1981-10-10 | 1983-04-18 | 株式会社松井色素化学工業所 | Production of short fiber flocked transfer print sheet |
| JPS5876291A (en) * | 1981-10-31 | 1983-05-09 | Tokyo Houraishiya:Kk | Transplanting material for flocking |
| GB8304129D0 (en) * | 1983-02-15 | 1983-03-16 | Hpw Ltd | Cutting and piercing devices |
| JPH0613239B2 (en) * | 1983-04-07 | 1994-02-23 | 富士ゼロックス株式会社 | Binding method |
| JPS60168637A (en) * | 1984-02-13 | 1985-09-02 | 三英ケミカル株式会社 | Thermal inversion type implanted transfer textile |
| JPS60171138A (en) * | 1984-02-16 | 1985-09-04 | 三英ケミカル株式会社 | Thermal inversion type implanted transfer textile |
| JPS6114942A (en) * | 1984-06-29 | 1986-01-23 | 三英ケミカル株式会社 | Thermal inversion type implanted transfer fabric |
| JPS6189378A (en) * | 1984-10-05 | 1986-05-07 | 三英ケミカル株式会社 | Thermal reversal type transfer cloth |
| JPS62103135A (en) * | 1985-10-30 | 1987-05-13 | 三英ケミカル株式会社 | Manufacture of thermal inversion type multicolor implanted transfer foundation |
| US6340084B1 (en) * | 1999-12-24 | 2002-01-22 | Terry E. Burcaw | Lumber staging device |
| US6763593B2 (en) | 2001-01-26 | 2004-07-20 | Hitachi Metals, Ltd. | Razor blade material and a razor blade |
| CN108145118B (en) * | 2018-01-11 | 2019-12-17 | 深圳大学 | amorphous alloy knife and manufacturing method thereof |
-
1977
- 1977-07-06 DE DE19772730530 patent/DE2730530A1/en not_active Withdrawn
- 1977-07-11 SE SE7708049A patent/SE7708049L/en not_active Application Discontinuation
- 1977-07-21 FR FR7722377A patent/FR2364745A2/en active Pending
- 1977-09-09 GB GB37661/77A patent/GB1592476A/en not_active Expired
- 1977-09-13 CA CA286,584A patent/CA1097992A/en not_active Expired
- 1977-09-13 JP JP10955377A patent/JPS5335619A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2784215A1 (en) * | 2013-03-28 | 2014-10-01 | Voith Patent GmbH | Scraper |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1592476A (en) | 1981-07-08 |
| JPS5335619A (en) | 1978-04-03 |
| FR2364745A2 (en) | 1978-04-14 |
| SE7708049L (en) | 1978-03-16 |
| DE2730530A1 (en) | 1978-03-23 |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry |